Welded pipe former
By adding large diameter large pressing rollers in the spiral welded pipe molder and adjusting the position of the side pressing rollers using the transverse driving device, the problem of "pouting" defects during the welded pipe molding process is solved, and the molding quality of the welded pipe is significantly improved.
Patent Information
- Application Number
- CN202421597814.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-08
AI Technical Summary
During the process of forming a spiral welded pipe, the occlusion edge of the steel pipe is prone to elastic deformation due to the influence of the side pressing roller and the inner pressing roller, causing the welded pipe molding seam to rise outward ('pout' defect), affecting the quality of the welded pipe.
A welded pipe molder is designed, including an inner pressing roller, an outer pressing roller and an external control roller. By adding large diameter large pressing rollers between the side pressing rollers and using a transverse driving device to accurately adjust the position of the side pressing rollers, the 'pout' defects in the steel pipe forming process are reduced.
Through the design of the welded pipe molder, the possibility of "pouting" defects on the joint of the welded pipe molding joint is significantly reduced, and the molding quality of the welded pipe is improved.
Smart Images
Figure CN222754088U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of spiral welded pipe processing equipment, in particular to a welded pipe former. Background Art
[0002] The production of spiral welded pipes is to unwind, level, trim and mill the hot-rolled strip, bend it in a former at a certain forming angle, and then weld the formed tube inside and outside to finally obtain a welded pipe.
[0003] During the forming process of spiral welded pipes, after the two interlocking edges of the steel pipe are interlocked, various factors often limit the process, causing one or both sides of the forming seam to warp outward (commonly known as "pouting"), which is a key factor affecting the quality of the welded pipe and measures must be taken to avoid it. By analyzing the causes of this defect, it can be determined that during the forming process of the strip steel, due to the influence of the side pressure roller and the inner pressure roller, elastic deformation occurs, internal extrusion and external stretching cause the parent material to expand excessively in the lateral direction during the deformation process, which is an important reason for the defect. Utility Model Content
[0004] The utility model aims to provide a welded pipe former to solve the problems existing in the prior art.
[0005] The purpose of the utility model is achieved as follows: a welded pipe former, comprising an inner pressure roller arranged on the inner side of a steel pipe body, an outer pressure roller and an outer control roller arranged around the outer side of the steel pipe body, the outer pressure roller is arranged below the steel pipe body, comprising a large pressure roller and side pressure rollers arranged on both sides of the large pressure roller, the large pressure roller and the inner pressure roller are arranged on the inner and outer sides of the steel pipe body opposite to each other, the diameter of the large pressure roller is larger than the diameters of the inner pressure roller and the side pressure roller, the outer control roller is arranged above the steel pipe body, comprising a first outer control roller located directly above the large pressure roller and a second outer control roller and a third outer control roller arranged on both sides of the first outer control roller, the large pressure roller is installed on a lifting base, the side pressure roller is installed on a transverse base, and the transverse base is connected to a transverse drive device.
[0006] The forming process of the spiral welded pipe blank of the welded pipe former of the utility model is as follows: the strip enters the former in the horizontal direction with the assistance of the guide plate, is bent and deformed by the joint action of the inner pressure roller and the outer pressure roller, and then the initially formed steel pipe is sized by the outer control roller, and finally can be welded by the inner and outer welding equipment to achieve the purpose of producing the required diameter steel pipe. The utility model greatly reduces the pouting defect in the steel pipe forming process by adding a large-diameter large pressure roller between the side pressure rollers, and accurately adjusts the lateral position of the side pressure rollers through the transverse driving device to bend the edge of the strip into the required pre-bending rate, further eliminating the possibility of the "pouting" defect in the welded pipe forming joint seam.
[0007] As a further improvement of the utility model, the first externally controlled roller is installed on the top bracket through a lifting and adjusting mechanism, one side of the top bracket is slidably connected to the vertical bracket, and the other side is slidably connected to the oblique support arm, the second externally controlled roller is slidably connected to the bottom side of the top bracket, and the third externally controlled roller is installed on the oblique support arm. The entire structure is easy to adjust and can meet the processing needs of spiral welded pipes of different diameters.
[0008] As a further improvement of the utility model, an oblique support is arranged on the bottom side of the vertical bracket, and a fourth externally controlled roller is slidably connected to the oblique support, which further improves the forming and sizing effect of the welded pipe.
[0009] As a further improvement of the utility model, the vertical bracket is slidably connected to the oblique support to expand the position adjustment range of the fourth externally controlled roller and ensure the forming and sizing effect of the welded pipe.
[0010] As a further improvement of the utility model, a telescopic support device is hinged on the outer side of the oblique support arm, and the lower end of the telescopic support device is hinged to the ground foundation. The telescopic support device can be adaptively telescopically adjusted as the position of the oblique support arm is adjusted, playing a supporting and fixing role for the oblique support arm, ensuring structural stability.
[0011] As a further improvement of the utility model, the side pressure roller is fixed on the mounting seat, and one end of the mounting seat is hinged to the transverse base, that is, the side pressure roller adopts a swinging roller, which improves the smooth movement of the strip into the former and the bending deformation effect, and reduces the rebound of the steel plate.
[0012] As a further improvement of the utility model, the diameter of the large pressure roller is 1.2-1.4 times that of the inner pressure roller and the side pressure roller, so as to avoid the "pouting" defect of the welded pipe forming joint to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the welded pipe former of the utility model.
[0014] Among them, 1 is a steel pipe main body, 2 is an inner pressure roller, 3 is a large pressure roller, 4 is a side pressure roller, 5 is a first externally controlled roller, 6 is a second externally controlled roller, 7 is a third externally controlled roller, 8 is a lifting base, 9 is a transverse shifting base, 10 is a transverse shifting driving device, 11 is a top bracket, 12 is a vertical bracket, 13 is an oblique support arm, 14 is a telescopic support device, 15 is a mounting seat, 16 is an oblique support, and 17 is a fourth externally controlled roller. DETAILED DESCRIPTION
[0015] like Figure 1 The welded pipe former shown comprises an inner pressure roller 2 arranged on the inner side of a steel pipe body 1 , an outer pressure roller and an outer control roller arranged around the outer side of the steel pipe body 1 .
[0016] The outer pressure roller is arranged below the steel pipe body 1, including a large pressure roller 3 and side pressure rollers 4 arranged on both sides of the large pressure roller 3. The large pressure roller 3 and the inner pressure roller 2 are arranged on the inner and outer sides of the steel pipe body 1, and the diameter of the large pressure roller 3 is larger than the diameters of the inner pressure roller 2 and the side pressure roller 4. Preferably, the diameter of the large pressure roller 3 is about 1.3 times that of the inner pressure roller 2 and the side pressure roller 4, so as to avoid the "pout" defect of the welded pipe forming joint seam to the maximum extent. Specifically, in this embodiment, the diameters of the inner pressure roller 2 and the side pressure roller 4 are 170mm, and the diameter of the large pressure roller 3 is 220mm. The large pressure roller 3 is installed on the lifting base 8, and the side pressure roller 4 is installed on the transverse base 9, and the transverse base 9 is connected to the transverse drive device 10. The side pressure roller 4 is fixed on the mounting seat 15, and one end of the mounting seat 15 is hinged to the transverse base 9, that is, the side pressure roller 4 adopts a swinging roller, which improves the smooth movement of the strip into the welded pipe former and the effect of bending deformation, and reduces the rebound of the steel plate.
[0017] The externally controlled rollers are arranged above the steel pipe body 1, including the first externally controlled roller 5 located just above the large pressure roller 3, and the second externally controlled roller 6 and the third externally controlled roller 7 arranged on both sides of the first externally controlled roller 5. The first externally controlled roller 5 is installed on the top bracket 11 through a lifting and adjusting mechanism. One side of the top bracket 11 is slidably connected to the vertical bracket 12, and the other side is slidably connected to the oblique support arm 13. The second externally controlled roller 6 is slidably connected to the bottom side of the top bracket 11, and the third externally controlled roller 7 is installed on the oblique support arm 13. The whole structure is easy to adjust and can meet the processing needs of spiral welded pipes of different diameters. A telescopic support device 14 is hinged on the outside of the oblique support arm 13, and the lower end of the telescopic support device 14 is hinged to the ground foundation. The telescopic support device 14 can be adaptively telescopically adjusted as the position of the oblique support arm 13 is adjusted, which plays a supporting and fixing role for the oblique support arm 13 to ensure structural stability.
[0018] In this embodiment, an oblique support 16 is slidably connected to the bottom side of the vertical bracket 12, and a fourth externally controlled roller 17 is slidably connected to the oblique support 16, which further improves the forming and sizing effect of the welded pipe.
[0019] The forming process of the spiral welded pipe blank of the welded pipe former of this embodiment is as follows: the strip enters the former in the horizontal direction with the assistance of the guide plate, is bent and deformed by the joint action of the inner pressure roller 2 and the outer pressure roller, and then the steel pipe preliminarily formed is sized by the outer control roller, and finally can be welded by the inner and outer welding equipment to achieve the purpose of producing the steel pipe with the required diameter. This embodiment greatly reduces the pouting defect in the steel pipe forming process by adding a large-diameter large pressure roller 3 between the side pressure rollers 4, and accurately adjusts the lateral position of the side pressure rollers 4 through the transverse driving device 10, so that the edge of the strip is bent into the required pre-bending rate, further eliminating the possibility of the "pouting" defect in the welded pipe forming joint seam.
[0020] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.
Claims
1. A welded pipe former, comprising an inner pressure roller arranged inside a steel pipe body, an outer pressure roller and an outer control roller arranged around the outer side of the steel pipe body, characterized in that: The outer pressure roller is arranged below the steel pipe body, including a large pressure roller and side pressure rollers arranged on both sides of the large pressure roller. The large pressure roller and the inner pressure roller are arranged on the inner and outer sides of the steel pipe body opposite to each other. The diameter of the large pressure roller is larger than that of the inner pressure roller and the side pressure roller. The outer control roller is arranged above the steel pipe body, including a first outer control roller located directly above the large pressure roller and a second outer control roller and a third outer control roller arranged on both sides of the first outer control roller. The large pressure roller is installed on a lifting base, and the side pressure roller is installed on a transverse moving base. The transverse moving base is connected to a transverse moving drive device.
2. The welded pipe former according to claim 1, characterized in that: The first externally controlled roller is installed on the top bracket through a lifting and adjusting mechanism. One side of the top bracket is slidably connected to the vertical bracket, and the other side is slidably connected to the oblique support arm. The second externally controlled roller is slidably connected to the bottom side of the top bracket, and the third externally controlled roller is installed on the oblique support arm.
3. The welded pipe former according to claim 2, characterized in that: An oblique support is arranged at the bottom side of the vertical bracket, and a fourth externally controlled roller is slidably connected to the oblique support.
4. The welded pipe former according to claim 3, characterized in that: The vertical bracket is slidably connected to the oblique support.
5. The welded pipe former according to claim 2, characterized in that: A telescopic support device is hinged on the outer side of the oblique support arm, and the lower end of the telescopic support device is hinged to the ground foundation.
6. The welded pipe former according to any one of claims 1 to 5, characterized in that: The side pressure roller is fixed on a mounting seat, and one end of the mounting seat is hinged to the transverse displacement base.
7. The welded pipe former according to any one of claims 1 to 5, characterized in that: The diameter of the large pressing roller is 1.2-1.4 times that of the inner pressing roller and the side pressing roller.