CN218946722U

CN218946722U - Flat top guide wheel for pre-welding machine

Info

Publication number: CN218946722U
Application number: CN202320164627.5U
Authority: CN
Inventors: 王文玉
Original assignee: Qingdao Jiaheng New Energy Equipment Co ltd
Current assignee: Qingdao Jiaheng New Energy Equipment Co ltd
Priority date: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-05-02
Anticipated expiration: 2033-02-01

Abstract

The utility model discloses a flat top guide wheel for a pre-welding machine, which comprises a wheel body, wherein the wheel body is rotationally connected to a wheel frame, the wheel frame is movably connected to the pre-welding machine and is provided with a welding gun, the wheel body is coaxially arranged in front of the welding gun to guide the welding gun, and round corners on two side surfaces of the outer wall surface of the wheel body are respectively abutted against two groove surfaces of a tube blank welding seam, so that the axis of the wheel body always tends to be horizontal under the action of dead weight, and a welding wire is always guided to be aligned with the tube blank welding seam. The utility model has good guiding performance, reasonable structure, wide application range and correction effect on defects such as seam misalignment and the like, and is beneficial to popularization and application.

Description

Flat top guide wheel for pre-welding machine

Technical Field

The utility model relates to the technical field of straight welded pipe processing, in particular to a flat top guide wheel for a pre-welding machine.

Background

The straight welded pipe, especially the large caliber thick wall straight welded pipe, is widely used in oil and gas transportation pipeline engineering, electric power tower, bridge construction, offshore platform and other heavy steel structure engineering. The process for manufacturing the straight welded pipe mainly comprises the steps of grooving a steel plate, pressing or rolling the steel plate into a pipe blank with joints (openings), pressing the openings and welding the joints (pre-welding), welding the inner surfaces of the joints, welding the outer surfaces of the joints and manufacturing the pipe.

Wherein, after the shaping process, the pre-welding process is used for applying force and pressing the joint of the open circular tube blank and welding while pressing (the joint and the welding are generally continuous) to form a closed circular tube blank; the special equipment for joint welding in the pre-welding procedure is called a pre-welding machine, and the guiding of a welding gun of the pre-welding machine is divided into two main types, namely laser guiding and mechanical guiding. The laser guide has strict requirements on the machining precision of the groove of the steel pipe blank and the precision of the whole machine of the pre-welding machine, and the manufacturing cost is tens of times of that of the mechanical guide. At present, the guiding of a welding gun of a domestic pre-welding machine mostly adopts a mechanical guiding wheel structure, as shown in fig. 1, the outer wall surface of the guiding wheel is usually designed to be provided with a taper angle, the outer wall surface of the guiding wheel provided with the taper angle rolls along a V-shaped groove of an open pipe blank, and the welding gun is guided to move along the groove.

In actual production, particularly in thick-wall straight welded pipe production, the wall thickness specification of the steel pipe is changeable, the bevel angle also changes along with the thickness change of the steel plate, in addition, the processing dimensional accuracy of the bevel is often uneven, so that the seam is often misplaced in the seaming process, the actual bevel is difficult to achieve an ideal completely symmetrical state, the taper of the outer wall surface of the guide wheel is difficult to completely coincide with the bevel angle of the welding seam, the taper angle of the guide wheel is easy to be inserted into the seam to be clamped, or the taper angle of the guide wheel is not in contact with the bevel of the bevel on the outer wall surface of the guide wheel, so that the guide wheel is easy to deviate in the bevel, a welding gun deviates, and welding defects such as welding seam deviation or bending are caused.

In addition, in general, the taper of the outer wall surface of the guide wheel is also matched with the inclination angle of the bevel of the steel pipe, so that different guide wheels are required to be matched according to the inclination angle of the bevel of the pipe blank, and the guide wheels are frequently replaced, so that the working efficiency is reduced and the labor intensity is increased.

Moreover, the pre-welding generally adopts two welding processes of gas-shielded welding and submerged-arc welding, and compared with the gas-shielded welding, the submerged-arc welding has the advantages of high welding efficiency, high welding seam quality, no arc pollution during welding and the like. When submerged arc pre-welding is used, the welding wire head is buried in the welding flux, whether the welding wire and the joint are aligned or not cannot be seen by a welding operator, and when the guide wheel with the taper angle deviates and does not go straight, the operator cannot find out in time and cannot correct the deviation in time. Therefore, when the mechanical guide wheel with the cone angle is used for guiding, the mechanical guide wheel with the cone angle is not suitable for the pre-welding performed by the submerged arc welding process.

Disclosure of Invention

The utility model discloses a flat top guide wheel for a pre-welding machine, which solves the problems of three outstanding defects of the guide wheel of the pre-welding machine in the prior art, namely, the uneven welding is easily caused by poor guiding performance; secondly, the guide wheel is required to be frequently replaced along with the change of the groove of the steel pipe; thirdly, submerged arc welding is not applicable. The flat-top guide wheel has the technical effects of good guide performance, reasonable structure, wide application range and correction effect on defects such as seam misalignment of a pipe blank. The technical scheme adopted is as follows:

the utility model provides a flat top leading wheel for prewelding machine, includes the wheel body, the wheel body rotates to be connected on the wheel carrier, wheel carrier swing joint just is equipped with the welder on the boom of prewelding machine on it, the welder direction is located to the wheel body coaxial in the place ahead for the welder, just both sides face fillet on the wheel body outer wall surface is contradicted with two groove faces of pipe welding seam respectively, so that the wheel body tends to the level all the time under the dead weight effect its axis, and the guide welding wire is aligned with the steel pipe seam all the time.

On the basis of the technical scheme, the outer wall surface of the wheel body is a cylindrical surface.

On the basis of the technical scheme, the outer wall surface of the wheel body and the two side surfaces of the wheel body are in smooth transition and form two side surface fillets.

On the basis of the technical scheme, the wheel body is made of high-temperature-resistant and wear-resistant metal or nonmetal materials.

On the basis of the technical scheme, the welding machine further comprises an installation seat, the wheel frame and the installation seat are coaxially arranged, one end, far away from the wheel body, of the wheel frame is connected with the installation seat in an up-down adjustable mode, and the installation seat can swing left and right to be hinged with the boom of the welding machine.

On the basis of the technical scheme, the mounting seat is further provided with a screw and a screw nut matched with the screw, two ends of the screw are respectively connected with the mounting seat in a rotating mode, the screw nut is sleeved on the screw and can be connected with the mounting seat in a vertical sliding mode, the right end of the wheel frame stretches into a groove in the left end face of the screw nut and can be connected with the screw nut in a vertical sliding mode, and the top face and the bottom face of the wheel frame are in butt joint with the groove wall of the groove through the compression spring.

On the basis of the technical scheme, the welding machine further comprises a linear guide rail and a slider matched with the linear guide rail, wherein the slider is fixedly connected with the mounting seat, the linear guide rail is fixedly connected with the boom of the welding machine, and the slider is sleeved on the linear guide rail and is connected with the boom of the welding machine in a sliding manner in a front-back manner.

On the basis of the technical scheme, the wheel frame comprises a guide wheel supporting plate, and a pin shaft penetrates through the guide wheel supporting plate and the wheel body to enable the wheel body to be rotationally connected with the guide wheel supporting plate.

Advantageous effects

The guide wheel has reasonable structure, the outer wall surface of the guide wheel stretches across the V-shaped groove of the pipe blank of the steel pipe, the round corners of the two side surfaces of the outer wall surface of the guide wheel are respectively abutted with the two groove surfaces of the welding seam of the pipe blank, when the groove angle or the opening size is reduced, the guide wheel automatically moves upwards, and when the groove angle or the opening size is increased, the guide wheel automatically moves downwards, so that the guide wheel with one specification can be suitable for the welding seam with various groove sizes, the application range is wide, the frequent replacement of the guide wheel can be avoided, the production efficiency is improved, the manual labor intensity is reduced, and meanwhile, the manual operation error can be avoided. In addition, when the processing size deviation of the pipe blank groove is large, the pipe blank joint is in a staggered edge state and the like, the guide wheel also has a correction function, specifically, the axis of the guide wheel always tends to be horizontal under the action of self gravity, so that the condition that the taper angle of the guide wheel with the taper angle is clamped in the joint or the taper angle is not matched with the inclined plane of the pipe blank groove can be avoided, further, welding defects such as uneven welding or uneven welding line can be avoided, the processing precision requirement on the steel plate groove is reduced, and the production cost is reduced. In addition, the outer wall surface of the guide wheel spans the V-shaped groove, the wheel frame can be adjusted up and down and can swing left and right, so that the axis of the guide wheel can be self-adaptively kept to be horizontal all the time, the welding wire is always aligned with the joint, the guide performance is good, gas shielded welding and submerged arc welding are both applicable, the guide wheel structure is reasonable in design, the outer wall surface of the guide wheel and the two side surfaces of the wheel body are smoothly transited to form two side surface fillets, and the processing is simple and convenient.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is apparent that the drawings in the following description are only one embodiment of the present utility model, and that other embodiments of the drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a prior art mechanical guide wheel structure;

FIG. 2 is a schematic view of the structure of the guide wheel of the present utility model;

FIG. 3 is a schematic view of the partial cross-sectional structure of FIG. 2;

FIG. 4 is a partial view of the side view of FIG. 2;

FIG. 5 is a schematic front view of the wheel body of the present utility model;

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in, or substituted for, those of others. The scope of the embodiments herein includes the full scope of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like herein are used merely to distinguish one element from another element and do not require or imply any actual relationship or order between the elements. Indeed the first element could also be termed a second element and vice versa. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a structure, apparatus or device comprising the element. Various embodiments are described herein in a progressive manner, each embodiment focusing on differences from other embodiments, and identical and similar parts between the various embodiments are sufficient to be seen with each other.

The terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein refer to an orientation or positional relationship based on that shown in the drawings, merely for ease of description herein and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus are not to be construed as limiting the utility model. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanically or electrically coupled, may be in communication with each other within two elements, may be directly coupled, or may be indirectly coupled through an intermediary, as would be apparent to one of ordinary skill in the art.

Herein, unless otherwise indicated, the term "plurality" means two or more.

Herein, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

Herein, the term "and/or" is an association relation describing an object, meaning that three relations may exist. For example, a and/or B, represent: a or B, or, A and B.

The flat top guide wheel for the pre-welding machine, as shown in fig. 2-5, comprises a wheel body 1, wherein the wheel body 1 is rotatably connected to a wheel frame 2, as shown in fig. 4, center bosses are symmetrically arranged on two side surfaces of the wheel body 1, the wheel frame 2 comprises a guide wheel supporting plate 9, a pin shaft passes through the guide wheel supporting plate 9 and the wheel body 1 to enable the wheel body 1 to be rotatably connected with the wheel frame 2, and a bearing is sleeved at the position of the pin shaft passing through the guide wheel supporting plate 9. In this embodiment, the wheel body 1 is made of a metal material with high temperature resistance and wear resistance, and in other embodiments of the present utility model, the wheel body may be made of a nonmetal material with high temperature resistance and wear resistance.

As shown in fig. 2 and 3, the wheel carrier 2 is movably connected to the boom 10 of the pre-welding machine, specifically, the pre-welding machine further comprises an installation seat 6, the wheel carrier 2 and the installation seat 6 are coaxially arranged along the advancing direction of the wheel body 1, just the right end of the wheel carrier 2 far away from the wheel body 1 is connected with the installation seat 6 and is adjustable up and down, specifically, the installation seat 6 is further provided with a lead screw 8 and a lead screw nut 7 matched with the lead screw 8, two ends of the lead screw 8 are respectively and rotatably connected with the installation seat 6, a bearing is sleeved at the rotating connection position of the lead screw 8, a hand wheel is installed at the top end of the lead screw 8, the lead screw nut 7 is sleeved on the lead screw 8 and is slidably connected with the installation seat 6 up and down, the hand wheel can drive the lead screw nut 7 to move up and down so as to adjust the up and down initial positions of the wheel carrier 2, as shown in fig. 3, the vertical fixedly connected with a shaft lever in the groove is arranged, the lead screw nut 7 is sleeved on the top surface of the right end of the wheel carrier 2 and the bottom surface of the lead screw nut through compression springs, the top surface of the lead screw 8 and the bottom surface of the lead screw 8 are respectively, the left end wall and the end wall of the left end wall of the lead screw nut 7 are correspondingly compressed by the springs and the groove 1 are correspondingly arranged, and the left end wall and the end wall of the swing body is correspondingly compressed, and the end wall is correspondingly prevented from the swing body is in the swing and the end frame is in the swing case is in the machine.

In addition, the welding machine further comprises a linear guide rail and a sliding block (not shown) matched with the linear guide rail, wherein two ends of the linear guide rail are fixedly connected with the boom of the pre-welding machine respectively, and the sliding block is sleeved on the linear guide rail and can be connected with the boom 10 of the pre-welding machine in a sliding mode back and forth.

The wheel carrier 2 is further provided with a welding gun 3, the welding gun 3 is upwards connected with a shaft lever, the shaft lever vertically passes through the wheel carrier 2, a pin shaft passes through the wheel carrier 2 and the shaft lever to vertically position the welding gun 3, the wheel body 1 is coaxially arranged in front of the welding gun 3 to guide the welding gun 3, as shown in fig. 4 and 5, the outer wall surface of the wheel body 1 is a cylindrical surface, and round corners of two side surfaces on the outer wall surface of the wheel body 1 are respectively abutted against two bevel 5 inclined surfaces of a welding seam of the pipe blank 4, so that the wheel body 1 is in linear contact with a sloping surface, the axis of the wheel body 1 always tends to be horizontal under the action of dead weight, and the welding wire is always aligned with the welding seam. In this embodiment, the outer wall surface of the wheel body 1 and the two side surfaces of the wheel body 1 are in smooth transition and form two side surface fillets, the two side surface fillets are easy and convenient to process, and the wheel body 1 is favorable to adaptively adjusting under the action of dead weight so that the axis of the wheel body tends to be horizontal, and the middle surface of the thickness direction of the wheel body is aligned with the seam of the tube blank.

The present utility model has been described above by way of example, but the present utility model is not limited to the above-described embodiments, and any modifications or variations based on the present utility model fall within the scope of the present utility model.

Claims

1. The utility model provides a flat top leading wheel for prewelding machine, its characterized in that, includes wheel body (1), wheel body (1) rotates to be connected on wheel carrier (2), wheel carrier (2) swing joint just is equipped with welder (3) on prewelding machine davit (10), wheel body (1) locate welder (3) the place ahead with direction welder (3) coaxially, just both sides face fillet on wheel body (1) outer wall surface is contradicted with two groove faces (5) of pipe (4) welding seam respectively, so that wheel body (1) trend the level all the time under the dead weight effect its axis, and the guide welding wire is aligned with the steel pipe seam all the time.

2. Flat top guide wheel for a pre-welder according to claim 1, characterized in that the outer wall surface of the wheel body (1) is a cylindrical surface.

3. The flat top guide wheel for the pre-welding machine according to claim 2, wherein the outer wall surface of the wheel body (1) is in smooth transition with two side surfaces of the wheel body (1) and forms two side surface fillets.

4. A flat top guide wheel for a pre-welder according to any one of claims 1 to 3, wherein the wheel body (1) is made of a high temperature and abrasion resistant metal or nonmetal material.

5. The flat top guide wheel for the pre-welding machine according to claim 4, further comprising a mounting seat (6), wherein the wheel frame (2) is coaxially arranged with the mounting seat (6), one end, far away from the wheel body (1), of the wheel frame (2) is connected with the mounting seat (6) in an up-down adjustable manner, and the mounting seat (6) is hinged with the boom (10) of the pre-welding machine in a left-right swinging manner.

6. The flat top guide wheel for the pre-welding machine according to claim 5, wherein the installation seat (6) is further provided with a screw rod (8) and a screw rod nut (7) matched with the screw rod (8), two ends of the screw rod (8) are respectively connected with the installation seat (6) in a rotating mode, the screw rod nut (7) is sleeved on the screw rod (8) and can be adjusted up and down relative to the installation seat (6), the right end of the wheel frame (2) stretches into a groove on the left end face of the screw rod nut (7) and is connected with the screw rod nut (7) in a sliding mode up and down, and the top face and the bottom face of the right end of the wheel frame (2) are in butt joint with the groove wall of the groove through compression springs.

7. The flat top guide wheel for the pre-welding machine according to claim 6, further comprising a linear guide rail and a sliding block matched with the linear guide rail, wherein two ends of the linear guide rail are fixedly connected with a boom of the pre-welding machine respectively, the sliding block is fixedly connected with the boom (10) of the pre-welding machine, and the sliding block is sleeved on the linear guide rail and is connected with the boom of the pre-welding machine in a sliding manner back and forth.

8. Flat top guide wheel for a pre-welder according to any of the claims 5-7, characterized in that the wheel frame (2) comprises a guide wheel support plate (9), a pin shaft passing through the guide wheel support plate (9) and the wheel body (1) to connect the wheel body (1) with the guide wheel support plate (9) in rotation.