Pipe welding apparatus and method of construction thereof

Abstract

The application discloses a pipeline welding device and a construction method thereof, and belongs to the technical field of pipeline welding devices. The pipeline welding device comprises a welding machine, two vertical rods respectively arranged at opposite ends of the welding machine, a pressure roller rotatably arranged on the two vertical rods, a welding head arranged on the vertical rod and connected to the welding machine, a driving roller rotatably arranged at the lower end of the vertical rod, auxiliary rollers arranged on the front and back sides of the driving roller, hinged arms rotatably arranged at the opposite sides of the vertical rod, the lower end of the hinged arm rotatably arranged on the auxiliary roller, a sliding groove arranged on the end surface of the welding machine and arranged perpendicularly to the vertical rod, a locking piece arranged in the sliding groove and used for locking the hinged arm, and a circular elastic belt detachably arranged on the outside of the pressure roller and the pipeline. The pipeline welding device solves the problem that the existing track type pipeline welding machine takes a long time to debug during installation and use.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding technology, specifically to a pipeline welding equipment and its construction method. Background Technology

[0002] Current pipe welding machines, such as magnetic pipe welding machines, use magnetic rollers to adhere to the pipe and weld along the circumference of the pipe. However, they cannot be used with stainless steel (which is not magnetic).

[0003] Some pipe welding machines use a track-type design. When welding steel pipes, a metal track is installed on the outside of the pipe, and the welding machine is mounted on and moves along the track to weld the pipe. However, installing the track requires multiple adjustments to the pipe to ensure the track is coaxial with the pipe, which is necessary to guarantee welding accuracy, making the operation relatively cumbersome.

[0004] Furthermore, when welding pipes of different diameters, the distance between the welding machine and the steel pipe cannot be determined. Therefore, when welding different pipes, the distance between the welding head and the circumference of the steel pipe must be determined before the program can be set to weld the steel pipe. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, a pipe welding equipment and its construction method are provided to solve the problem of long commissioning time during the installation and use of existing track-type pipe welding machines.

[0006] To achieve the above objectives, a pipe welding device is provided, comprising:

[0007] A welding machine, wherein two poles are respectively erected at opposite ends of the welding machine, and pressure rollers are rotatably mounted on the two poles. A welding head is mounted on the poles and the welding head is connected to the welding machine.

[0008] An active roller rotatably rotates at the lower end of the upright.

[0009] Auxiliary rollers are arranged on the front and rear sides of the active roller. Hinged arms are rotatably connected to opposite sides of the upright. The lower end of the hinged arm is rotatably mounted on the auxiliary roller. A sliding groove is opened on the end face of the welding machine. The sliding groove is perpendicular to the upright. A locking member for locking the hinged arm is installed in the sliding groove in an adjustable position. The auxiliary roller is supported on the circumferential surface of the pipe so that the upright is arranged in the radial direction of the pipe.

[0010] An annular elastic band, detachably clamped, is provided outside the pressure roller and the pipe so that the active roller and the auxiliary roller press against the circumferential surface of the pipe. After the active roller rotates, the welding machine moves along the circumferential direction of the pipe between the inner side of the annular elastic band and the circumferential surface of the pipe, so that the welding head moves along the circumferential direction of the pipe.

[0011] Furthermore, guide grooves are provided on opposite sides of the two uprights, the guide grooves are arranged along the axial direction of the uprights, and the two ends of the pressure roller are rotatably connected to socket sleeves, the socket sleeves are lifted and lowered and fitted onto the upper end of the uprights, and a push spring is connected between the socket sleeves and the welding machine.

[0012] Furthermore, the upper end of the hinge arm is provided with a shaft hole, and the opposite sides of the two columns are connected to a pivot. The shaft holes of the hinge arms on the front and rear sides of the drive roller are rotatably fitted onto the pivot.

[0013] Furthermore, a strip-shaped hole is provided in the middle of the hinge arm, extending along the length of the hinge arm, and the locking member includes:

[0014] A locking rod, one end of which is slidably disposed in the sliding groove, and the middle part of which is movably disposed in the strip hole;

[0015] A retaining element is adjustablely mounted on the other end of the locking rod. The retaining element presses against the side of the hinge arm away from the welding machine so that the hinge arm presses against the end face of the welding machine.

[0016] Furthermore, the other end of the locking rod has an external thread, and the pressing member has a threaded hole, with the other end of the locking rod screwed into the threaded hole of the pressing member.

[0017] Furthermore, a limiting groove is formed on the circumferential surface of the pressure roller, and the annular elastic band is embedded in the limiting groove.

[0018] This invention provides a construction method for pipeline welding equipment, comprising the following steps:

[0019] The welding machine is placed on the circumferential surface of the pipe to be welded, such that the drive rollers at opposite ends of the welding machine are arranged along the axial direction of the pipe.

[0020] Adjust the position of the locking component in the groove of the welding machine so that the auxiliary rollers on the front and rear sides of the active roller are supported on the circumferential surface of the pipe so that the upright is set along the radial direction of the pipe.

[0021] A removable annular elastic band is placed on the outside of the pressure roller and the pipe so that the driving roller and the auxiliary roller press against the circumferential surface of the pipe.

[0022] When the active roller is turned on to rotate, the welding machine moves along the circumferential direction of the pipe between the inner side of the annular elastic band and the circumferential surface of the pipe, so that the welding head moves along the circumferential direction of the pipe.

[0023] The welding machine is turned on, and the welding head welds the pipe along the circumference of the pipe.

[0024] The beneficial effects of the present invention are that the pipe welding equipment of the present invention adopts an annular elastic belt, which can ensure a tight fit between the welding machine and the steel pipe when the annular elastic belt is taut, and the welding machine is always coaxially set with the steel pipe; the pressure roller is rolledly connected to the annular elastic belt, and the pressure roller will rotate when the welding machine rolls, reducing the friction between it and the annular elastic belt, so that the welding machine can move stably and at a uniform speed.

[0025] The pipe welding equipment of the present invention can be adapted to pipes of different diameters. However, regardless of the type of pipe, the straight line direction of the upright and the drive roller always points to the axis of the steel pipe, ensuring that the distance between the welding head and the circumference of the steel pipe is fixed. When welding different pipes, it is not necessary to redetermine the distance between the welding head and the circumference of the pipe.

[0026] The pipe welding equipment of this invention features a hinged arm and auxiliary rollers that are always in contact with the circumferential surface of the steel pipe, ensuring that the straight line of the upright always points to the axis of the steel pipe and guaranteeing the accuracy of the welding position. When setting the welding thickness (or weld depth), the determination of the welding depth can be more accurate. Furthermore, during the movement of the welding machine, it ensures that the welding head is always perpendicular to the tangent of the circumferential surface of the steel pipe, guaranteeing the uniformity of the weld thickness. On the other hand, it eliminates the need for cumbersome installation and debugging, improving the efficiency of pipe welding construction. Attached Figure Description

[0027] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the pipe welding equipment according to an embodiment of the present invention.

[0029] Figure 2 This is a partially enlarged schematic diagram of the pipe welding equipment according to an embodiment of the present invention.

[0030] Figure 3 This is a top view of the pipe welding equipment according to an embodiment of the present invention. Detailed Implementation

[0031] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Reference Figures 1 to 3 As shown, the present invention provides a pipe welding device, including: a welding machine 1, a drive roller 2, an auxiliary roller 3, and an annular elastic belt 4.

[0034] Welding machines are electrical appliances that provide power with certain characteristics for welding. Welding is widely used in various industrial fields, such as aerospace, shipbuilding, automobiles, and containers, due to its advantages of flexibility, simplicity, convenience, strength and reliability, and the fact that the welded material can even have the same strength as the base material.

[0035] In this embodiment, welding machine 1 is selected as an argon arc welding machine, such as a tungsten inert gas (TIG) welding machine. The welding machine's casing is rectangular. The welding machine has opposite left and right ends and opposite front and rear sides. Uprights 12 are respectively erected at opposite ends of the welding machine 1. The upper ends of the uprights extend above the welding machine, and the lower ends extend below the welding machine. Pressure rollers 13 are rotatably mounted on the two uprights 12. The pressure rollers are located at the upper ends of the uprights. Welding heads 11 are mounted on the uprights 12. The welding heads 11 are connected to the welding machine 1.

[0036] The active roller 2 is rotatably mounted on the lower end of the upright 12. In this embodiment, the active roller is an electric roller. A motor is installed at the lower end of the upright. The motor is driven and connected to the axle of the active roller. The axle is arranged along the axial direction of the pipeline. Auxiliary rollers 3 are respectively provided on the front and rear sides of the active roller 2.

[0037] Specifically, hinged arms 31 are rotatably connected to opposite sides of the upright 12. The lower ends of the hinged arms 31 are rotatably mounted on auxiliary rollers 3. A sliding groove 10 is formed on the end face of the welding machine 1. The sliding groove 10 is perpendicular to the upright 12. A locking element 32 is adjustablely installed in the sliding groove. The locking element 32 is used to lock the hinged arms 31, so that the auxiliary rollers at the lower ends of the two hinged arms are equally spaced on the front and rear sides of the driving roller. The auxiliary rollers 3 are supported on the circumferential surface of the pipe 5 so that the upright 12 is positioned along the radial direction of the pipe 5.

[0038] The removable elastic band 4 is set outside the pressure roller 13 and the pipe 5 so that the driving roller 2 and the auxiliary roller 3 press against the circumferential surface of the pipe 5.

[0039] After the active roller is started, the active roller 2 rotates to drive the welding machine 1 to move along the circumference of the pipe 5 between the inner side of the annular elastic band 4 and the circumferential surface of the pipe 5, so that the welding head 11 moves along the circumferential direction of the pipe 5.

[0040] In a preferred embodiment, guide grooves are provided on opposite sides of the two uprights 12. The guide grooves are arranged along the axial direction of the uprights 12. Socket sleeves 14 are rotatably connected to both ends of the pressure roller 13. Socket sleeves 14 are vertically and flexibly fitted onto the upper end of the uprights. A push spring is connected between the socket sleeves 14 and the welding machine 1.

[0041] Specifically, the upper end of the upright is movably inserted into the socket sleeve along its axial direction. In this embodiment, the inner diameter of the lower end of the socket sleeve is larger than the inner diameter of the middle part of the socket sleeve. The socket sleeve slides towards the lower end of the upright under the pressure of the annular elastic band, as... Figure 2 As shown, the lower end of the socket sleeve is fitted over the upper end of the two hinged arms, causing the two hinged arms to flip downwards simultaneously, thereby causing the auxiliary roller to press against the circumferential surface of the pipe to be welded.

[0042] In this embodiment, refer to Figure 2 As shown, the upper end of the hinge arm 31 has a shaft hole. Pivots are connected to the opposite sides of the two columns. The distance from the pivot to the bottom of the drive roller is less than the distance from the pivot to the bottom of the auxiliary roller. The angles between the two hinge arms and the columns are equal. The columns are positioned on the bisector of the angle between the two hinge arms. The shaft holes of the hinge arms 31 on both the front and rear sides of the drive roller 2 are rotatably fitted onto the pivots.

[0043] As a preferred embodiment, the hinge arm 31 has a strip-shaped hole in the middle part, which is arranged along the length direction of the hinge arm 31.

[0044] In this embodiment, the locking member 32 includes a locking rod and a pressing member. Slide grooves are formed on the end faces of opposite ends of the welding machine, and the upright is perpendicular to the slide grooves. The slide grooves intersect with the strip-shaped holes.

[0045] One end of the locking rod is slidably disposed in the slide groove 10. The middle part of the locking rod is movably disposed in the strip hole. The pressing member is adjustablely installed at the other end of the locking rod. The pressing member presses against the side of the hinge arm 31 away from the welding machine 1 so that the hinge arm 31 presses against the end face of the welding machine 1.

[0046] In a preferred embodiment, the other end of the locking rod has an external thread. The pressing member has a threaded hole. The other end of the locking rod is screwed into the threaded hole of the pressing member.

[0047] In a preferred embodiment, a limiting groove is formed on the circumferential surface of the pressure roller 13. The annular elastic band 4 is embedded in the limiting groove.

[0048] This invention provides a construction method for pipeline welding equipment, comprising the following steps:

[0049] S1. Place the welding machine 1 on the circumferential surface of the pipe 5 to be welded, such that the active rollers 2 at opposite ends of the welding machine 1 are set along the axial direction of the pipe 5.

[0050] S2. Adjust the position of the locking element 32 in the slide groove 10 of the welding machine 1 so that the auxiliary rollers 3 on the front and rear sides of the active roller 2 are supported on the circumferential surface of the pipe 5 so that the upright 12 is set along the radial direction of the pipe 5.

[0051] S3. The removable elastic band 4 is placed on the outside of the pressure roller 13 and the pipe 5 so that the active roller 2 and the auxiliary roller 3 press against the circumferential surface of the pipe 5.

[0052] S4. When the active roller 2 is turned on to rotate, the welding machine 1 moves along the circumferential direction of the pipe 5 between the inner side of the annular elastic band 4 and the circumferential surface of the pipe 5, so that the welding head 11 moves along the circumferential direction of the pipe 5.

[0053] S5. Turn on welding machine 1, and weld head 11 along the circumference of pipe 5.

[0054] The pipe welding equipment of the present invention uses the elastic pressure of an annular elastic band to set up a welding machine and a steel pipe together. A vertical pole is fixedly installed on the central axis of the welding machine, and a socket sleeve is slidably provided on the inner side of the upper end of the vertical pole. The socket sleeve can move downward along the vertical pole. A pressure roller is rotatably installed on the top of the socket sleeve via a hinge support. The pressure roller and the steel pipe are in contact with the inner wall of the annular elastic band.

[0055] Two hinged arms are rotatably mounted on the upright via a pivot. The tops of the two hinged arms are mounted on the same pivot, forming a V-shape. A drive roller is also installed at the bottom of the upright. The drive roller can only rotate at the bottom of the upright. Auxiliary rollers are rotatably mounted at the lower end of the hinged arms.

[0056] The welding machine has grooves on the side walls of both ends, and through slots on the hinged arms. Locking rods are installed at the intersection of the grooves and slots. During installation, the tightness of the clamping parts is adjusted to change the position of the insert rod within the grooves. As the hinged arms move outwards, the opening of the V-shaped structure widens, allowing the insert rod to slide outwards within the grooves.

[0057] The outer diameter of the bottom opening of the socket sleeve is larger than the diameter of the upper opening of the socket sleeve, and the bottom of the socket sleeve presses against the upper end of the hinge arm. After the socket sleeve moves downward, the opposite sides of the end face of the socket sleeve simultaneously press down against the two hinge arms, so that the two hinge arms can move synchronously and symmetrically about the axis of the upright, thereby keeping the state of the welding machine unchanged, that is, the upright is always in the center of the V-shaped structure.

[0058] When the articulated arm is open, it also acts as a load-bearing component. The socket sleeve acts on the articulated arm. Since the articulated arm and the upright are set together, the force of the socket sleeve is also transferred to the upright. The upright is subjected to a downward force until it is tightly fitted with the steel pipe. At this time, the auxiliary roller is also opened to its maximum state. Then, the fastening bolts can be tightened to fix the position of the articulated arm and the welding machine, that is, to fix the opening size of the V-shaped structure. In other words, the articulated arm and the upright are shaped to ensure that the extension line of the upright always passes through the axis of the steel pipe.

[0059] The welding machine is placed on top of the steel pipe to be welded, and a ring-shaped elastic band is used to wrap around the steel pipe and the pressure roller on top of the welding machine. The pressure roller can roll on top of the socket sleeve. The upright of welding machine 1 points vertically downwards towards the axis of the steel pipe, and the welding head is installed on one side of the upright.

[0060] The socket sleeve is located on the upper outer side of the upright. The annular elastic band is tightened and contracts along the radial direction of the steel pipe. During the contraction, the pressure roller and the socket sleeve also move along the radial direction of the steel pipe and squeeze the hinged arm located on the upright.

[0061] The hinged arm is rotatably connected to the middle of the upright. The hinged arm, under the thrust of the socket sleeve, opens to both sides along the circumference of the steel pipe, forming a V-shaped structure. Furthermore, the movement of the two hinged arms is synchronous and symmetrical about the upright.

[0062] Simultaneously, as the socket sleeve moves downwards, the hinge arm opens, causing the upright and drive roller to move downwards and come into close contact with the steel pipe, while the hinge arm opens to its maximum position. At this time, the annular elastic band contracts to its tightest position.

[0063] A slotted hole is provided on the articulated arm, and a groove is provided on the side wall of the welding machine. A fastening bolt is installed at the intersection of the groove and the slotted hole. The fastening bolt is not tightened when the V-shaped structure formed by the articulated arm is not fully open. The drive roller and the steel pipe are tightly fitted together. When the V-shaped structure formed by the articulated arm is fully open and the annular elastic band is fully contracted, the fastening bolt can be tightened to fix the articulated arm and the welding machine together, thus completing the fixation of the V-shaped structure. The V-shaped structure can accommodate steel pipes of different diameters.

[0064] The bottom of the drive roller remains tangent to the steel pipe, and the distance between the drive roller and the welding machine is constant. The line containing the drive roller passes through the axis of the steel pipe. When the drive roller is in close contact with the steel pipe, the distance from the welding head to the circumference of the steel pipe is fixed. This distance remains constant regardless of the diameter of the steel pipe. Therefore, when welding steel pipes of different diameters, it is not necessary to redetermine the distance from the welding head to the circumference of the steel pipe, making it applicable to steel pipes of various diameters.

[0065] The bottom of the welding machine is also equipped with a motor, which drives the drive roller to move along the circumference of the steel pipe to achieve welding.

[0066] The pipe welding equipment of the present invention adopts an annular elastic belt. When the annular elastic belt is taut, it can ensure a tight fit between the welding machine and the steel pipe, and the welding machine is always set coaxially with the steel pipe. The pressure roller is rolledly connected to the annular elastic belt. When the welding machine rolls, the pressure roller will rotate, reducing the friction between it and the annular elastic belt, so that the welding machine can move stably and at a uniform speed.

[0067] The pipe welding equipment of this invention, through the coordinated operation of the socket sleeve, upright, and hinged arm, causes the hinged arm to open outward into a V-shape as the socket sleeve moves downward. Simultaneously, the socket sleeve, along with the upright and welding machine, moves downward and fits into the steel pipe. The opening of the V-shape varies depending on the diameter of the steel pipe. The larger the diameter, the larger the opening of the V-shape; conversely, the smaller the diameter, the smaller the opening of the V-shape.

[0068] The pipe welding equipment of the present invention can be adapted to pipes of different diameters. However, regardless of the type of pipe, the straight line direction of the upright and the drive roller always points to the axis of the steel pipe, ensuring that the distance between the welding head and the circumference of the steel pipe is fixed. When welding different pipes, it is not necessary to redetermine the distance between the welding head and the circumference of the pipe.

[0069] The pipe welding equipment of this invention features a hinged arm and auxiliary rollers that are always in contact with the circumferential surface of the steel pipe, ensuring that the straight line of the upright always points to the axis of the steel pipe, thus guaranteeing accurate welding position. When setting the welding thickness (or weld depth), the determination of the welding depth can be more accurate, and during the movement of the welding machine, it can ensure that the welding head is always perpendicular to the tangent of the circumferential surface of the steel pipe, guaranteeing the uniformity of the welding thickness.

[0070] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A pipe welding device, characterized in that, include: A welding machine, wherein uprights are respectively installed at opposite ends of the welding machine, and pressure rollers are rotatably installed on the two uprights. Welding heads are installed on the uprights and connected to the welding machine. An active roller is rotatably mounted on the lower end of the upright; Auxiliary rollers are arranged on the front and rear sides of the active roller. Hinged arms are rotatably connected to opposite sides of the upright. The auxiliary rollers are rotatably mounted on the lower end of the hinged arms. A sliding groove is opened on the end face of the welding machine. The sliding groove is perpendicular to the upright. A locking member for locking the hinged arms is installed in the sliding groove in an adjustable position. The auxiliary rollers are supported on the circumferential surface of the pipe so that the upright is arranged along the radial direction of the pipe. An annular elastic band, detachably clamped, is provided outside the pressure roller and the pipe so that the active roller and the auxiliary roller press against the circumferential surface of the pipe. After the active roller rotates, the welding machine moves along the circumferential direction of the pipe between the inner side of the annular elastic band and the circumferential surface of the pipe, so that the welding head moves along the circumferential direction of the pipe.

2. The pipe welding equipment according to claim 1, characterized in that, Guide grooves are provided on opposite sides of the two uprights, and the guide grooves are arranged along the axial direction of the uprights. The two ends of the pressure roller are rotatably connected to socket sleeves, and the socket sleeves are lifted and lowered and fitted onto the upper end of the uprights. A push spring is connected between the socket sleeves and the welding machine.

3. The pipe welding equipment according to claim 1, characterized in that, The upper end of the hinge arm is provided with a shaft hole, and the opposite sides of the two uprights are connected to a pivot. The shaft holes of the hinge arms on the front and rear sides of the drive roller are rotatably fitted onto the pivot.

4. The pipe welding equipment according to claim 3, characterized in that, The hinge arm has a strip-shaped hole in its middle portion that extends along the length of the hinge arm, and the locking element includes: A locking rod, one end of which is slidably disposed in the sliding groove, and the middle part of which is movably disposed in the strip hole; A retaining element is adjustablely mounted on the other end of the locking rod. The retaining element presses against the side of the hinge arm away from the welding machine so that the hinge arm presses against the end face of the welding machine.

5. The pipe welding equipment according to claim 4, characterized in that, The other end of the locking rod has an external thread, and the pressing member has a threaded hole. The other end of the locking rod is screwed into the threaded hole of the pressing member.

6. The pipe welding equipment according to claim 5, characterized in that, A limiting groove is formed on the circumferential surface of the pressure roller, and the annular elastic band is embedded in the limiting groove.

7. A construction method for a pipe welding equipment as described in any one of claims 1 to 6, characterized in that, Includes the following steps: The welding machine is placed on the circumferential surface of the pipe to be welded, such that the drive rollers at opposite ends of the welding machine are arranged along the axial direction of the pipe. Adjust the position of the locking component in the groove of the welding machine so that the auxiliary rollers on the front and rear sides of the active roller are supported on the circumferential surface of the pipe so that the upright is set along the radial direction of the pipe. A removable annular elastic band is placed on the outside of the pressure roller and the pipe so that the driving roller and the auxiliary roller press against the circumferential surface of the pipe. When the active roller is turned on to rotate, the welding machine moves along the circumferential direction of the pipe between the inner side of the annular elastic band and the circumferential surface of the pipe, so that the welding head moves along the circumferential direction of the pipe. The welding machine is turned on, and the welding head welds the pipe along the circumference of the pipe.

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