Flat welding tool for pressure-bearing pipe orifice

Abstract

The utility model discloses a flat-position welding tool for a pressure-bearing pipe orifice. The flat-position welding tool comprises a workbench, a rotating track, a positioning track and a positioning pin. The workbench is composed of the supporting legs, the tie bars and the connecting plates, and supporting is stable; the two positioning rails are oppositely arranged on the workbench and provided with a plurality of positioning holes. The two rotating rails are installed on the positioning rails through positioning pins, angle steel is adopted, bearings and square groove holes are matched, and flexible rotation of pipe openings is achieved. The tool is simple in structure, low in cost and capable of being manufactured on a construction site. By adjusting the distance between the rotating rails to adapt to pressure-bearing pipe orifices with different diameters, a welder can rotate the pipe orifices at any time, so that a welding seam is kept at a flat welding position, the welding quality is improved, and defects are reduced. The tool is easy and convenient to operate and suitable for manual or semi-automatic welding, the production efficiency is remarkably improved, the maintenance cost is reduced, and the wide engineering application value is achieved.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a flat welding fixture for pressure-bearing pipe openings. Background Technology

[0002] Pressure vessels, as key equipment in the industrial field, are widely used in many industries such as petroleum, chemical, energy, and power. In the petrochemical industry, various pressure vessels such as towers and reactors undertake the important tasks of material reaction, separation, and storage. As the connection hub between the pressure vessel and the external piping system, the pressure-bearing nozzles must withstand the long-term effects of high temperature, high pressure, and corrosive media. The welding quality of the nozzles is a key guarantee for the service life of the equipment, and the welding quality of the nozzles is crucial to the use of pressure vessels.

[0003] Currently, manufacturers primarily employ two methods for welding pressure vessel nozzles: one is to purchase specialized automated equipment, such as automatic positioners, automatic roller frames, and dedicated welding machines. Automated equipment is generally expensive, especially for heavy-duty equipment, increasing costs. Furthermore, its adaptability and specificity are insufficient for on-site operations or when encountering nozzles with unique structures, making it difficult to achieve ideal welding results. The other method involves manual or semi-automatic welding, relying on the welder's skills to perform horizontal or all-position welding, incorporating continuous lifting and turning processes to complete the welding of the pressure vessel nozzle. This method demands a high level of skill from the welder, as horizontal or all-position welding is prone to defects, making it difficult to guarantee the quality of the weld joint. Moreover, if horizontal welding is to be used, which is easier to operate, auxiliary lifting equipment is required, and the welder needs to operate more meticulously. Completing the welding of a single nozzle often takes a considerable amount of time, severely restricting production progress for mass-produced pressure vessel nozzles and failing to meet the actual production needs of manufacturers.

[0004] Therefore, developing a low-cost, simple-structured, and easy-to-use welding fixture for pressure pipe openings that can be fabricated by welders on-site is of significant practical importance and engineering application value. This fixture can not only save production costs but also facilitate welders' use, providing strong assurance for welding quality in manual or semi-automatic welding applications. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the following technical problems existing in the prior art, the present invention provides a pressure-bearing pipe port flat welding fixture, characterized in that it includes a worktable, a rotating track, a positioning track and a positioning pin, the two positioning tracks are arranged in a relative position on the worktable, and the two rotating tracks are arranged on the positioning track by the positioning pin.

[0007] As a preferred technical solution for a pressure-bearing pipe port flat welding fixture, the positioning track is provided with a number of positioning holes.

[0008] As a preferred technical solution for a pressure-bearing pipe port flat welding fixture, the workbench includes legs, tie rods, and a connecting plate. The connecting plate is supported by several legs, and the legs are connected to each other by the tie rods.

[0009] As a preferred technical solution for a pressure-bearing pipe port horizontal welding fixture, the support leg can be made of hollow round tube, hollow square tube or angle steel.

[0010] As a preferred technical solution for a pressure-bearing pipe port horizontal welding fixture, the rotating track is made of angle steel, and the rotating track is equipped with bearings through bearing fixing pins.

[0011] As a preferred technical solution for a pressure-bearing pipe port flat welding fixture, the rotating track is provided with a square slot.

[0012] The beneficial effects of this utility model are: during the manual welding process of the flange of the pipe to be welded and the connecting pipe / forged pipe, the welder can rotate the pipe opening at any time according to his own needs during the welding process, so that the welding speed and the rotation of the pipe opening are matched, and the weld pool is kept in a flat welding position, thereby ensuring more reliable weld quality. Moreover, the device is inexpensive, simple in structure, and can be made by welders on the construction site, making it simple and practical. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0014] Figure 1 This is a structural diagram of the welding fixture for the pressure-bearing pipe inlet at a horizontal position;

[0015] Figure 2 This is a schematic diagram of the use of the flat welding fixture for pressure-bearing pipe openings;

[0016] Figure 3 This is the main view of the pressure-bearing pipe inlet horizontal welding fixture used for horizontal welding;

[0017] Figure 4 This is a bottom view of the rotating track;

[0018] Figure 5 It is a structural diagram of a positioning track with positioning holes.

[0019] Reference numerals: 1. Workbench; 11. Support leg; 12. Tie rod; 13. Connecting plate; 2. Rotating track; 21. Square slot; 22. Bearing; 23. Bearing fixing pin; 3. Positioning track; 4. Positioning pin; 5. Pressure-bearing pipe port. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0023] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0024] Please refer to Figures 1 to 5 As shown, the technical solution of this utility model provides a flat welding fixture for pressure-bearing pipe openings, consisting of a worktable, rotating rails, positioning rails, and positioning pins. The worktable has a square structure and includes legs, tie rods, and connecting plates for support. The rotating rails consist of two parts, including angle steel, bearings, and bearing fixing pins, providing rotation for the pipe openings. Positioning holes are arranged on the positioning rails. The distance between the two rotating rails is adjusted according to the diameter of the pressure-bearing pipe opening, and the positioning pins are inserted into the positioning holes for limiting the position, thereby adapting to various specifications of pressure-bearing pipe openings for flat welding and ensuring the quality of the circumferential weld of the pressure-bearing pipe opening.

[0025] The workbench includes support legs, tie rods, and connecting plates. The workbench is made of steel, and the components are fixed together by welding to form a stable structure, so as to ensure sufficient rigidity to support the weight of pressure-bearing pipes of different sizes to be welded.

[0026] The legs of the workbench can be made of hollow round tubes, hollow square tubes, or angle steel, which helps to reduce the weight of the workbench itself and facilitates handling on the construction site.

[0027] Furthermore, the rotating track can be made of angle steel, and bearings and bearing fixing pins are installed on the rotating track. There are two rotating tracks, which are distributed on both sides below the pressure-bearing pipe opening to be welded.

[0028] Furthermore, the rotating track has square slots to provide space for the bearing to rotate. The bearing is placed into the square slots on the angle steel, and the spacing is adjusted to prevent interference between the bearing and the angle steel when rotating. The bearing retaining pin is then passed through the bearing's center hole on the back of the angle steel and welded firmly to the rotating track, providing a fulcrum for the bearing's rotation.

[0029] Furthermore, the positioning track has symmetrically distributed through holes for the insertion of positioning pins, providing a limiting function for the rotating track.

[0030] Furthermore, the distance between the two rotating tracks can be adjusted according to the diameter of the pressure-bearing pipe opening to be welded. When the rotating track is placed on the positioning track, the positioning pin is inserted into the through hole on the positioning track nearby, thus realizing that the workpiece diameter applicable to the flat welding fixture for the pressure-bearing pipe opening is adjustable.

[0031] The embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A welding fixture for a pressure-bearing pipe port at a horizontal position, characterized in that, It includes a worktable, a rotating track, a positioning track, and a positioning pin. Two positioning tracks are arranged on the worktable in a relative position, and two rotating tracks are set on the positioning tracks by the positioning pin.

2. The pressure-bearing pipe port horizontal welding fixture according to claim 1, characterized in that, The positioning track has several positioning holes.

3. The pressure-bearing pipe port horizontal welding fixture according to claim 1, characterized in that, The workbench includes legs, tie rods, and a connecting plate. The connecting plate is supported by several legs, and the legs are connected to each other by the tie rods.

4. The pressure-bearing pipe port parallel welding fixture according to claim 3, characterized in that, The outriggers can be made of hollow round tubes, hollow square tubes, or angle steel.

5. The pressure-bearing pipe port horizontal welding fixture according to claim 1, characterized in that, The rotating track is made of angle steel, and the rotating track is equipped with bearings via bearing fixing pins.

6. The pressure-bearing pipe port horizontal welding fixture according to claim 5, characterized in that, The rotating track has square slots.

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