Steel pipe flange welding auxiliary tool

Abstract

The utility model relates to the technical field of steel pipe flange welding, in particular to a steel pipe flange welding auxiliary tool. In order to solve the problem that the judgment error is large when a naked eye correction method is adopted for judging whether a flange plane is parallel to the cross section of a steel pipe or not, the novel steel pipe flange welding auxiliary tool comprises two vertical butt joint plates and I-shaped steel, and the length direction of the I-shaped steel is arranged in the front-back direction; a left flange plate and a right flange plate of the I-shaped steel are fixed to the inner side end faces of the upper ends of the two vertical butt joint plates respectively, the front end face of the I-shaped steel is flush with the front side faces of the two vertical butt joint plates, and the inner side end faces of the lower ends of the two vertical butt joint plates are arc faces matched with the left side and the right side of the circumferential face of the upper portion of the steel pipe. A welding notch is formed in the front end of a middle web of the I-shaped steel. When the auxiliary tool is used for welding the steel pipe flange, a plurality of defective workpieces are reduced, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe flange welding, in particular to a steel pipe flange welding auxiliary tool. Background Art

[0002] With the continuous improvement of coal mine production capacity, underground working faces are gradually extending farther, and underground drainage pipelines are being used more and more. This requires the welding of a large number of 4-inch, 6-inch, 8-inch and other steel pipe flanges. When welders weld the flanges at both ends of the steel pipe, they need to use the naked eye correction method to judge that the flange plane is parallel to the cross-section of the steel pipe before welding. However, the naked eye correction method has a large error in judgment, so the parallelism of the welded flange plane and the cross-section of the steel pipe often does not meet the specified standards. When the non-standard steel pipe flanges are welded during pipeline installation and docking, either the pipelines are not arranged neatly or the two flanges are not tightly docked, resulting in bevels, water leakage, etc., which often lead to rework of pipeline laying, low work efficiency and a large waste of manpower and material resources. Summary of the invention

[0003] In order to solve the problem of large judgment error when judging whether the flange plane is parallel to the cross section of a steel pipe by using naked eye correction method, the utility model provides a new steel pipe flange welding auxiliary tool.

[0004] The utility model is realized by adopting the following technical solutions:

[0005] A steel pipe flange welding auxiliary tool comprises two vertical butt plates symmetrically distributed on the left and right, an I-beam composed of a left flange plate, a right flange plate and a middle web plate, the length direction of the I-beam is arranged along the front-to-back direction, the left flange plate and the right flange plate of the I-beam are respectively fixed to the inner end faces of the upper ends of the two vertical butt plates, the front end face of the I-beam is flush with the front side faces of the two vertical butt plates, the inner end faces of the lower ends of the two vertical butt plates are both arc surfaces matched with the left and right sides of the upper circumferential surface of the steel pipe, and the front end of the middle web of the I-beam is provided with a welding notch.

[0006] When in use, first put the flange on the steel pipe, then use a square to measure the distance that the outer edge of the inner ring of the flange exceeds the orifice of the steel pipe. The appropriate distance is 1mm, and then the welding auxiliary tool described in the utility model is placed on the steel pipe to be welded with the flange and the front side surfaces of its two vertical docking plates are in close contact with the flange. At this time, since the vertical docking plate in the auxiliary tool that contacts the flange is consistent with the cross-section of the steel pipe, this ensures that the flange plane is parallel to the cross-section of the steel pipe. During the final welding, use one hand to lightly float the flange so that the flange is close to the vertical docking plate of the tool, and use the other hand to spot weld the contact position of the flange and the steel pipe in the welding notch on the I-beam with a welding gun, and then spot weld the contact position of the flange and the steel pipe at the lower side of the two vertical docking plates of the tool respectively. In this way, the position of the flange is fixed at three points, and then the tool is removed, and the flange and the steel pipe can be continuously arc welded.

[0007] Furthermore, a lifting ring is fixed to the rear end of the middle web of the I-beam, which facilitates the use and carrying of the tool.

[0008] Furthermore, multiple corners of each vertical docking plate are rounded, thereby improving the safety and convenience of using the tool.

[0009] Furthermore, the distance between the outer end surfaces of the upper ends of the two vertical docking plates is smaller than the distance between the outer end surfaces of the lower ends of the two vertical docking plates, which plays a role in reducing weight while ensuring that the set functions can be achieved.

[0010] Furthermore, the length of the I-beam is 100 mm, which is reasonable in size and easy to use.

[0011] The beneficial effects produced by the utility model are as follows: when the auxiliary tool in the utility model is used for steel pipe flange welding, it greatly ensures that the flange plane is parallel to the cross section of the steel pipe, reduces a lot of defective workpieces, effectively improves work efficiency, effectively improves welding quality, and avoids a lot of waste of manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings herein are incorporated into and constitute a part of the specification, show embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 This is a front view of the steel pipe flange welding auxiliary tool described in the utility model;

[0015] Figure 2 for Figure 1 A top view of

[0016] Figure 3 for Figure 1 Side view of.

[0017] In the figure: 1-vertical butt plate, 2-I-beam, 21-left flange plate, 22-right flange plate, 23-middle web plate, 3-arc surface, 4-welding notch, 5-lifting ring. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the scheme of the utility model will be further described below. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0019] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] The specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 3 As shown, a steel pipe flange welding auxiliary tool comprises two vertical butt plates 1 symmetrically distributed on the left and right, an I-beam 2 consisting of a left flange plate 21, a right flange plate 22 and a middle web plate 23, the length direction of the I-beam 2 is arranged along the front-to-back direction, the left flange plate 21 and the right flange plate 22 of the I-beam 2 are respectively fixed to the inner end faces of the upper ends of the two vertical butt plates 1, the front end face of the I-beam 2 is flush with the front side faces of the two vertical butt plates 1, the inner end faces of the lower ends of the two vertical butt plates 1 are both arc surfaces 3 matched with the left and right sides of the upper circumferential surface of the steel pipe, and the front end of the middle web 23 of the I-beam 2 is provided with a welding notch 4.

[0023] When in use, first put the flange on the steel pipe, then use a square to measure the distance that the outer edge of the inner ring of the flange exceeds the orifice of the steel pipe. The appropriate distance is 1mm, and then the welding auxiliary tool described in the utility model is placed on the steel pipe to be welded with the flange and the front side of its two vertical docking plates 1 is in close contact with the flange. At this time, since the vertical docking plate 1 in the auxiliary tool that contacts the flange is consistent with the cross-section of the steel pipe, this ensures that the flange plane is parallel to the cross-section of the steel pipe. Finally, when welding, use one hand to lightly float the flange so that the flange is close to the vertical docking plate 1 of the tool, and use the other hand to spot weld the contact position of the flange and the steel pipe in the welding notch 4 on the I-beam 2 with a welding gun, and then spot weld the contact position of the flange and the steel pipe at the lower side of the two vertical docking plates 1 of the tool respectively. In this way, the position of the flange is fixed at three points, and then the tool is removed, and the flange and the steel pipe can be continuously arc welded.

[0024] During specific implementation, a lifting ring 5 is fixed to the rear end of the middle web 23 of the I-beam 2, so as to facilitate the use and carrying of the tool.

[0025] In specific implementation, multiple corners of each vertical docking plate 1 are rounded to improve the safety and convenience of using the tool.

[0026] In specific implementation, the distance between the outer end surfaces of the upper ends of the two vertical docking plates 1 is smaller than the distance between the outer end surfaces of the lower ends of the two vertical docking plates 1, which plays a role in reducing weight while ensuring that the set functions can be achieved.

[0027] In this specific implementation manner, the length of the I-beam 2 is 100 mm, which is of reasonable size and convenient to use.

[0028] The above is only a specific implementation of the utility model, which enables those skilled in the art to understand or implement the utility model. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A steel pipe flange welding auxiliary tool, characterized in that: The invention comprises two vertical butt joint plates (1) symmetrically arranged on the left and right, an I-beam (2) composed of a left flange plate (21), a right flange plate (22) and a middle web plate (23), the length direction of the I-beam (2) being arranged in the front-to-back direction, the left flange plate (21) and the right flange plate (22) of the I-beam (2) being respectively fixed to the inner end faces of the upper ends of the two vertical butt joint plates (1), the front end face of the I-beam (2) being flush with the front side faces of the two vertical butt joint plates (1), the inner end faces of the lower ends of the two vertical butt joint plates (1) being arc surfaces (3) matching the left and right sides of the upper circumferential surface of the steel pipe, and the front end of the middle web plate (23) of the I-beam (2) being provided with a welding notch (4).

2. A steel pipe flange welding auxiliary tool according to claim 1, characterized in that: A lifting ring (5) is fixed to the rear end of the middle web (23) of the I-beam (2).

3. A steel pipe flange welding auxiliary tool according to claim 2, characterized in that: Multiple corners of each vertical docking plate (1) are rounded.

4. A steel pipe flange welding auxiliary tool according to claim 3, characterized in that: The distance between the outer end surfaces of the upper ends of the two vertical butt joint plates (1) is smaller than the distance between the outer end surfaces of the lower ends of the two vertical butt joint plates (1).

5. A steel pipe flange welding auxiliary tool according to claim 4, characterized in that: The length of the I-beam (2) is 100 mm.

Images