Flame cutting device for large-diameter steel pipe

Abstract

The utility model discloses a flame cutting device for a large-diameter steel pipe, which is applied to the machining process of a large-diameter spiral welded steel pipe, is more stable in the cutting process by arranging a triangular spherical positioning mode, and is more stable in the cutting process by matching with an elastic buffer structure and an adjusting control structure at the rear end. Meanwhile, the distance between a cutting gun of the flame cutting device and the surface of the steel pipe is kept consistent all the time, and the flame cutting device is not influenced by factors such as large caliber, overall out-of-roundness and large outer diameter deviation of the steel pipe, so that the end face of the pipe is flush during cutting, the pipe orifice and the groove angle are consistent, and the cutting efficiency is improved. And the requirement of directly performing butt welding after the steel pipe is cut is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe cutting, and in particular relates to a flame cutting device for large-diameter steel pipes. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Among the large-diameter steel pipes, spiral welded steel pipes have been widely used in various fields such as municipal administration, water conservancy, gas, petroleum, and public works. They have been widely recognized by various industries for their good pressure resistance, high strength, and reliability. In the actual production and processing of spiral welded steel pipes, large chamfering machines and flame cutting devices are usually used for processing, but there are certain technical problems:

[0004] Large chamfering machines are too large and expensive, and are affected by factors such as processing accuracy and matching clearance. It is difficult to meet the processing accuracy of spiral welded steel pipes after processing.

[0005] When current flame cutting devices process large-diameter spiral steel pipes, the steel pipes usually need to be rotated for cutting. Since the steel pipes themselves have large diameters, large overall non-roundness and large outer diameter deviations, the rotation of the steel pipes can easily cause the distance between the cutting gun in the flame cutting device and the steel pipe to be unstable, resulting in changes in the cutting angle and cutting distance, resulting in inconsistent angles of the pipe mouth and groove after cutting, and being unable to meet the requirements for direct butt welding after the steel pipes are cut.

[0006] In the prior art, generally, the spiral welded steel pipe is first flame cut by a flame cutting device, and then is manually leveled using an angle grinder to perform secondary processing. The overall production efficiency is low and the processing quality of the spiral welded steel pipe is poor. Utility Model Content

[0007] The utility model aims to provide a flame cutting device for large-diameter steel pipes, which is applied in the processing of large-diameter spiral welded steel pipes. The flame cutting device is more stable in the cutting process by setting a triangular spherical positioning method. The flame cutting device is not affected by rotation and shaking in the steel pipe cutting process by cooperating with the elastic buffer structure and the adjustment control structure at the rear end. At the same time, the distance between the cutting gun of the flame cutting device and the surface of the steel pipe is always kept consistent, and the distance is not affected by factors such as the large diameter of the steel pipe, the overall non-roundness and the large outer diameter deviation. The end face of the pipe is more flush during cutting, and the angles of the pipe mouth and the groove are consistent, so as to meet the requirement of directly performing butt welding after the steel pipe is cut.

[0008] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0009] In a first aspect, an embodiment of the utility model provides a flame cutting device for a large-diameter steel pipe, comprising a triangular fixing frame, wherein the triangular fixing frame is respectively connected to a cutting gun fixing structure, a spherical pressing structure and an elastic buffer structure, and the direction of the line connecting the positions of the cutting gun fixing structure and the spherical pressing structure on the triangular fixing frame is parallel to the axis direction of the steel pipe;

[0010] The other end of the elastic buffer structure away from the triangular fixing frame is fixedly connected to the adjusting control structure; the spherical clamping structure is arranged on the outside of the steel pipe, and the elastic buffer structure is located at the rear of the elastic clamping structure away from the steel pipe. The direction of the connecting line of the spherical clamping structure, the elastic buffer structure and the adjusting control structure is perpendicular to the axial direction of the steel pipe.

[0011] As a further technical solution, the cutting gun fixing structure includes a cutting gun body, the bottom end of the cutting gun body is slidably connected to a triangular fixing frame through a guide structure, and the top end of the cutting gun body is arranged on the outside of the steel pipe.

[0012] As a further technical solution, a cutting gun fixing block is connected to the side of the cutting gun body, and the cutting gun fixing block is connected to the cutting gun locking structure.

[0013] As a further technical solution, the guide structure is also connected to an angle adjustment structure, and the angle adjustment structure is provided with a scale.

[0014] As a further technical solution, the angle adjustment structure includes a strip plate and a fan-shaped block, the fan-shaped block is arranged inside the triangular positioning frame, the strip plate is arranged outside the triangular positioning frame, and the strip plate and the fan-shaped block are fixedly connected.

[0015] As a further technical solution, the fan core of the fan-shaped block is connected to the guide structure, and the arc edge of the fan-shaped block is tangent to the triangular positioning frame.

[0016] As a further technical solution, the cutting gun locking structure includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are connected through a connecting block, the first connecting rod is fixedly connected to the cutting gun fixing block, and the second connecting rod is fixedly connected to the fan-shaped block.

[0017] As a further technical solution, the spherical pressing structure includes a spherical pressing block and a spherical bearing. The spherical bearing and the spherical pressing block are arranged cocentrically, and the spherical bearing is fixedly connected to a triangular fixing frame.

[0018] As a further technical solution, the elastic buffer structure is one of a gas rod, a hydraulic rod, and a spring.

[0019] As a further technical solution, the regulating and controlling structure comprises a connecting plate, the elastic buffer structure is fixedly connected to the connecting plate, and a fixing structure is provided at the other end of the connecting plate.

[0020] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0021] (1) The flame cutting device for large-diameter steel pipes provided by the utility model is aimed at the problem that the ends of the cutting links are not aligned and misaligned seriously due to the large diameter of the steel pipe, the high height of the weld rib, the large out-of-roundness and the large outer diameter deviation during the cutting process of the large-diameter spiral welded steel pipe. By setting a triangular fixing frame and a spherical clamping structure, the flame cutting device is more stable during the cutting process, and cooperates with the elastic buffer structure and the adjustment control structure at the rear end to prevent it from being affected by the rotation and shaking during the steel pipe cutting process. At the same time, the distance between the cutting gun of the flame cutting device and the surface of the steel pipe is always kept consistent, so that the end face of the pipe is more flush during cutting, and the angles of the pipe mouth and the groove are consistent, meeting the requirement of directly performing butt welding after the steel pipe is cut.

[0022] (2) The utility model sets the fixing frame as a triangular structure, which can rely on the stability of the triangular structure to improve the structural stability of the overall device. At the same time, according to the structure of the triangular positioning frame, a guiding structure and an angle adjustment structure are set to achieve horizontal movement and angle adjustment of the cutting gun, so that the device can process large-diameter steel pipes of different sizes, thereby improving the practicality of the device.

[0023] (3) The utility model adopts a spherical clamping block to vertically clamp large-diameter steel pipes. The movement path of the spherical clamping block on the steel pipe is more flexible, which can avoid the shaking and movement of ordinary cylindrical structures or other structures when they are subjected to axial vertical force when moving on the steel pipe, thereby causing unstable cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1 This is a structural front view of a flame cutting device for a large-diameter steel pipe in Example 1 of the utility model;

[0026] Figure 2 It is a structural side view of a flame cutting device for large-diameter steel pipes in Example 1 of the utility model.

[0027] The schematic diagram is for illustrative purposes only;

[0028] Among them, 1. cutting gun body; 2. cutting gun fixing block; 3. cutting gun locking structure; 4. guiding structure; 5. angle adjustment structure; 6. triangular fixing frame; 7. adjustment control structure; 8. elastic buffer structure; 9. spherical clamping structure; 10. steel pipe. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] Example 1

[0031] In a typical implementation of the present invention, Figure 1 As shown, a flame cutting device for large-diameter steel pipes is provided, including a triangular fixing frame 6, which is respectively connected to a cutting gun fixing structure, a spherical clamping structure 9 and an elastic buffer structure 8, and the direction of the line connecting the positions of the cutting gun fixing structure and the spherical clamping structure 9 on the triangular fixing frame 6 is parallel to the axial direction of the steel pipe 10.

[0032] The other end of the elastic buffer structure 8 away from the triangular fixing frame 6 is fixedly connected to the adjusting control structure 7; the spherical clamping structure 9 is arranged on the outside of the steel pipe 10, and the elastic buffer structure 8 is located at the rear of the spherical clamping structure 9 away from the steel pipe 10. The direction of the connecting line of the spherical clamping structure 9, the elastic buffer structure 8 and the adjusting control structure 7 is perpendicular to the axial direction of the steel pipe 10.

[0033] In this embodiment, the triangular fixing frame 6 adopts a right-angled triangle, which is respectively connected to the cutting gun fixing structure, the spherical clamping structure 9 and the elastic buffer structure 8, and the right-angle end is connected to the spherical clamping structure 9. The direction of the line connecting the positions of the cutting gun fixing structure and the spherical clamping structure 9 on the triangular fixing frame is parallel to the axial direction of the steel pipe 10, that is, the two are on the right-angle side of the triangular fixing frame 6, and the other right-angle side perpendicular to this right-angle side is connected to the elastic buffer structure 8, that is, the direction of the connecting line of the spherical clamping structure 9, the elastic buffer structure 8 and the adjustment control structure 7 is perpendicular to the axial direction of the steel pipe 10.

[0034] Among them, the fixing frame is set as a triangular structure, which can rely on the stability of the triangular structure to improve the structural stability of the overall device. At the same time, the spherical clamping structure 9 can be placed at the end of the steel pipe 10. The ends of large-diameter steel pipes are generally free of weld ribs, so the device is not affected by the weld ribs, and the overall cutting effect is more stable and of higher quality.

[0035] In this embodiment, the cutting gun fixing structure includes a cutting gun body 1, the bottom end of the cutting gun body 1 is slidably connected to the triangular fixing frame 6 through the guide structure 4, and the top end of the cutting gun body 1 is arranged outside the steel pipe 10. The top end of the cutting gun body 1 and the steel pipe 10 have a certain preset distance and angle, and the cutting gun body 1 can move along one side of the triangular fixing frame 6. It is understandable that in other embodiments, a plasma cutting device can also be used as the cutting gun body 1.

[0036] In this embodiment, a torch fixing block 2 is connected to the side of the torch body 1, and the torch fixing block 2 is connected to a torch locking structure 3. The torch locking structure 3 is used to lock and fix the torch body 1 after the position and angle are determined to prevent the torch body 1 from shaking during use.

[0037] In this embodiment, the guide structure 4 is also connected to an angle adjustment structure 5 to facilitate adjustment of the angle of the cutting gun body 1. The angle adjustment structure 5 is provided with scales to allow operators to perform angle adjustment operations more intuitively.

[0038] In this embodiment, the angle adjustment structure 5 includes a strip plate and a fan-shaped block. The fan-shaped block is arranged inside the triangular positioning frame, and the strip plate is arranged outside the triangular fixing frame 6. The strip plate and the fan-shaped block are fixedly connected. The fan center of the fan-shaped block is connected to the guide structure 4, and the arc edge of the fan-shaped block is tangent to the triangular fixing frame 6.

[0039] It is understandable that, according to the structure of the triangular fixing frame 6, the guiding structure 4 and the angle adjustment structure 5 are arranged in cooperation to realize the horizontal movement and angle adjustment of the cutting gun, so that the device can process large-diameter steel pipes of different sizes, thereby improving the practicability of the device.

[0040] In this embodiment, the cutting gun locking structure 3 includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are connected through a connecting block, the first connecting rod is fixedly connected to the cutting gun fixing block 2, and the second connecting rod is fixedly connected to the fan-shaped block. Through the above arrangement, the cutting gun locking structure 3, the cutting gun body 1, the angle adjustment structure 5, and the guide structure 4 form a whole, making the overall structure of the device more stable while ensuring that the device is not easy to shake during use, and the position of the cutting gun body 1 can also be adjusted, thereby improving its practicality.

[0041] In this embodiment, the spherical pressing structure 9 includes a spherical pressing block and a spherical bearing, the spherical bearing and the spherical pressing block are arranged with the same spherical center, and the spherical bearing is fixedly connected to the triangular fixing frame 6. It can be understood that the spherical pressing block is used to vertically press the large-diameter steel pipe, and the walking path of the spherical pressing block on the steel pipe is more flexible, which can avoid the problem of shaking and moving of ordinary cylindrical structures or other structures when they are subjected to axial vertical force on the steel pipe, thereby causing unstable cutting.

[0042] In this embodiment, the elastic buffer structure 8 is one of a gas rod, a hydraulic rod, and a spring.

[0043] In this embodiment, the adjustment control structure 7 includes a connecting plate, the elastic buffer structure 8 is fixedly connected to the connecting plate, and the other end of the connecting plate is provided with a fixing structure. By adjusting the control structure 7, the distance between the device and the working steel pipe 10 can be adjusted as a whole, and the device can be fixed and provided with stability support. In other embodiments, the connecting plate includes but is not limited to a circular, square, or rectangular structure.

[0044] The working principle of the flame cutting device for large-diameter steel pipes in this utility model is as follows:

[0045] First, fix the device by adjusting the control structure 7, and adjust the distance to place the device outside the large-diameter steel pipe 10, so that the spherical pressing structure 9 can vertically press and contact the outside of the steel pipe 10;

[0046] Then, the position of the cutting gun body 1 is adjusted by the guide structure 4 and the angle adjustment structure 5, and the cutting gun body 1 is adjusted to the predetermined processing position. After the position and angle of the cutting gun body 1 are determined, the position of the cutting gun body 1 is fixed by the cutting gun locking structure 3;

[0047] Carry out cutting operations.

[0048] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A flame cutting device for large diameter steel pipes, characterized in that: It comprises a triangular fixing frame, the triangular fixing frame is respectively connected to the cutting gun fixing structure, the spherical pressing structure and the elastic buffer structure, and the direction of the position connection line of the cutting gun fixing structure and the spherical pressing structure on the triangular fixing frame is parallel to the axis direction of the steel pipe; The other end of the elastic buffer structure away from the triangular fixing frame is fixedly connected to the adjusting control structure; the spherical clamping structure is arranged on the outside of the steel pipe, and the elastic buffer structure is located at the rear of the elastic clamping structure away from the steel pipe. The direction of the connecting line of the spherical clamping structure, the elastic buffer structure and the adjusting control structure is perpendicular to the axial direction of the steel pipe.

2. A flame cutting device for large diameter steel pipes as claimed in claim 1, characterized in that: The cutting gun fixing structure comprises a cutting gun body, the bottom end of the cutting gun body is slidably connected to a triangular fixing frame through a guide structure, and the top end of the cutting gun body is arranged on the outside of the steel pipe.

3. A flame cutting device for large diameter steel pipes as claimed in claim 2, characterized in that: A cutting gun fixing block is connected to the side of the cutting gun body, and the cutting gun fixing block is connected to the cutting gun locking structure.

4. A flame cutting device for large diameter steel pipes as claimed in claim 2, characterized in that: The guide structure is also connected to an angle adjustment structure, and the angle adjustment structure is provided with a scale.

5. A flame cutting device for large diameter steel pipes as claimed in claim 4, characterized in that: The angle adjustment structure comprises a strip plate and a fan-shaped block, wherein the fan-shaped block is arranged inside the triangular positioning frame, and the strip plate is arranged outside the triangular positioning frame, and the strip plate and the fan-shaped block are fixedly connected.

6. A flame cutting device for large diameter steel pipes as claimed in claim 5, characterized in that: The fan core of the fan-shaped block is connected to the guide structure, and the arc edge of the fan-shaped block is tangent to the triangular positioning frame.

7. A flame cutting device for large diameter steel pipes as claimed in claim 3, characterized in that: The cutting gun locking structure comprises a first connecting rod and a second connecting rod, wherein the first connecting rod and the second connecting rod are connected via a connecting block, the first connecting rod is fixedly connected to the cutting gun fixing block, and the second connecting rod is fixedly connected to the fan-shaped block.

8. The flame cutting device for large diameter steel pipe according to claim 1, characterized in that: The spherical pressing structure comprises a spherical pressing block and a spherical bearing. The spherical bearing and the spherical pressing block are arranged cocentrically, and the spherical bearing is fixedly connected to a triangular fixing frame.

9. The flame cutting device for large diameter steel pipe according to claim 1, characterized in that: The elastic buffer structure is one of a gas rod, a hydraulic rod and a spring.

10. The flame cutting device for large diameter steel pipe according to claim 1, characterized in that: The regulating and controlling structure comprises a connecting plate, the elastic buffer structure is fixedly connected to the connecting plate, and the other end of the connecting plate is provided with a fixing structure.

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