Metal pipeline welding device and method

Abstract

The present invention discloses a metal pipe welding device and method, which relates to the field of welding technology, and comprises two symmetrically arranged circular frames and a gasket workpiece, wherein the inner end of the circular frame is fixedly connected with a positioning block, and the outer end of the positioning block is provided with a fixing assembly for installing the gasket workpiece to the position of the pipe welding position, and the outer ends of the two circular frames are provided with connecting pieces, and the gasket workpiece is installed on the top of the connecting piece, and a grinding and cleaning assembly for post-processing the gasket workpiece after pipe welding is provided between the two circular frames. The metal pipe welding device and method, through the drive of a third motor, a mechanical transmission system composed of a first gear, a first gear ring, a second gear ring and a second gear, ensures that the grinding wheel can accurately adjust the position and efficiently grind the weld. At the same time, the linkage design of the driving wheel and the fan plate not only cleans the impurities generated by grinding in time, but also accelerates the cooling of the weld, which helps to improve the quality of the weld.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a metal pipeline welding device and method. Background Art

[0002] In the field of pipeline welding, especially for arc pipeline welding, welding backing device plays a vital role. The welding backing device in the prior art usually includes a welding platform, backing material and an adjustment mechanism, which is intended to ensure the uniformity and quality of the weld during the welding process;

[0003] However, with the continuous advancement of welding technology, the requirements for weld quality are also increasing. The existing welding backing device has the following defects:

[0004] Difficulty in cleaning impurities: If the impurities generated by traditional welding backing devices during welding are not cleaned in time, it will seriously affect the cleanliness and quality of the weld. Traditional welding backing devices usually rely on manual operation for impurity cleaning, which is inefficient and difficult to ensure the cleaning effect;

[0005] Insufficient welding stress release: If the stress generated during welding cannot be released in time, the risk of weld cracking will increase. Traditional welding backing devices lack effective means for stress release and are difficult to meet the needs of high-quality welding. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a metal pipe welding device and method, which solves the technical problems mentioned in the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a metal pipe welding device, comprising two symmetrically arranged circular frames and a gasket workpiece, the inner ends of the circular frames are fixedly connected with positioning blocks, the outer ends of the positioning blocks are provided with fixing components for installing the gasket workpiece to the position of the pipe welding, the outer ends of the two circular frames are provided with connecting pieces, and the gasket workpiece is installed on the top of the connecting pieces, and a grinding and cleaning component for post-processing the gasket workpiece after pipe welding is provided between the two circular frames;

[0008] The grinding and cleaning assembly includes a third motor located between two positioning blocks, driving members are provided on both sides of the third motor, a rotating frame is provided on the driving member, a supporting frame is provided at the outer end of the rotating frame, a grinding wheel for grinding the weld is provided on the top of the supporting frame, fan plates for heat dissipation and dust removal are rotatably provided on both sides of the grinding wheel, and a knocking rod for cleaning is provided at the outer end of the fan plate.

[0009] As a further preferred embodiment of the present technical solution, the driving member includes a first gear fixedly mounted on the output end of the third motor, the outer end of the first gear is meshedly connected with a first ring gear rotatably mounted on the inner end of the positioning block, the outer end of the first ring gear is meshedly connected with a second gear, and the rotating frame is mounted on the second gear, and the outer end of the second gear is meshedly connected with a second ring gear fixedly mounted on the connecting member.

[0010] As a further preferred embodiment of the present technical solution, a circular groove is provided at the inner end of the circular frame, the rotating frame is slidably connected to the circular frame via a slider located in the circular groove, a cylinder is fixedly connected to the rotating frame, the output end of the cylinder is fixedly connected to the support frame, and the support frame is slidably connected to the rotating frame via a guide rod.

[0011] As a further preferred embodiment of the present technical solution, the grinding wheel is installed on the supporting frame through a mounting frame, and a fourth motor is arranged on one side of the mounting frame, driving wheels are arranged at both ends of the fourth motor, and a pushing rod is rotatably connected to a position deviating from the center of the circle between the driving wheels, and a swing rod is rotatably connected to the other end of the pushing rod, and the swing rod is fixedly connected to the fan plate.

[0012] As a further preferred embodiment of the present technical solution, a first rotating shaft is fixedly connected to the outer end of the driving wheel, the first rotating shaft is connected to the second rotating shaft through a second bevel gear set, and the second rotating shaft is connected to a spline rod and a third rotating shaft through a third bevel gear set.

[0013] As a further preference of the present technical solution, moving rods are connected at both ends of the spline rod, and the moving rods are rotated and slidably installed on the support frame through a mounting seat, and the two ends of the moving rod are respectively fixedly connected to a limit disk and a toggle rod, a winding disk is provided on the outer wall of the rotating frame, and a first damping spring is provided on the outer wall of the moving rod, and convex rods are fixedly connected on both sides of the outer wall of the winding disk, and adjustment parts corresponding to the positions of the toggle rods are provided on both sides of the support frame, a pull rope is wound around the winding disk, and the other end of the pull rope is fixedly connected to the knocking rod, and brackets are fixedly connected on both sides of the support frame, and the knocking rod is slidably installed on the bracket in the vertical direction, and a second damping spring is provided between the knocking rod and the bracket.

[0014] As a further preferred embodiment of the present technical solution, the adjusting member includes a double-head frame fixedly mounted on a supporting frame, and a first trapezoidal block and a second trapezoidal block are fixedly mounted on both sides of the double-head frame respectively, the positions of the first trapezoidal block and the second trapezoidal block correspond to the positions of the toggle lever, and the first trapezoidal block and the second trapezoidal block are centrally symmetrically arranged.

[0015] As a further preferred embodiment of the present technical solution, the fixed component includes a disc rotatably mounted on the outer end of the positioning block, three groups of cross bars are fixedly connected to the outer end of the disc, a fixed frame is slidably connected to the three groups of cross bars, three groups of support rods are rotatably connected to the outer end of the fixed frame, a second motor is fixedly connected to the support rods, and the output end of the second motor is connected to the moving wheel through the first bevel gear group.

[0016] As a further preferred embodiment of the present technical solution, a first motor is fixedly installed at the other end of the three groups of cross bars, a screw rod is fixedly connected to the output end of the first motor, and the other end of the screw rod is rotatably connected to the fixed frame, a movable frame is threadedly connected to the outer wall of the screw rod, and three groups of first connecting rods are rotatably connected to the outer end of the movable frame, and the other end of the first connecting rod is rotatably connected to the support rod.

[0017] As a further preferred embodiment of the present technical solution, the connecting member includes a vertical rod fixedly mounted on the outer end of the disc, a sliding rod is slidably connected to the surface of the vertical rod, and a pad workpiece is arranged on the top of the connecting member, a second connecting rod is rotatably connected to the side wall of the sliding rod, and the other end of the second connecting rod is rotatably connected to the support rod.

[0018] The present invention also discloses a metal pipe welding method, which specifically comprises the following steps:

[0019] Step 1: The first motor and the screw drive the moving frame to slide on the cross bar, and the first connecting rod and the support rod are used to adjust the moving wheel to fit the inner wall of the pipe, thereby adjusting the position of the liner workpiece. The second motor rotates synchronously with the moving wheel to move the liner workpiece according to the position of the weld.

[0020] Step 2: When the support rod rotates, the second connecting rod drives the slide rod to move up and down, thereby adjusting the height of the liner workpiece and installing it to the position of the pipeline weld;

[0021] Step three, the third motor drives the first gear to rotate, and through the cooperation of the first gear ring and the second gear ring, drives the second gear and the rotating frame to rotate in a circle, and then adjusts the grinding position of the grinding wheel. The fourth motor drives the grinding wheel and the driving wheel to rotate synchronously to grind the weld, and uses the fan plate to generate wind flow to blow away the grinding impurities. At the same time, the driving wheel drives the spline rod to rotate through a series of gear sets, and then through the cooperation of the toggle rod, the winding disk and the pull rope, the reciprocating knocking action of the knocking rod is realized, and the polished pipe is knocked and cleaned.

[0022] Compared with the prior art, it has the following beneficial effects:

[0023] Driven by the third motor, the mechanical transmission system composed of the first gear, the first gear ring, the second gear ring and the second gear ensures that the grinding wheel can accurately adjust its position and grind the weld efficiently. At the same time, the linkage design of the driving wheel and the fan plate not only cleans up the impurities generated by grinding in time, but also accelerates the cooling of the weld, which helps to improve the quality of the weld.

[0024] The design of the mechanical transmission system allows the grinding wheel to be precisely adjusted in position, ensuring that burrs and protrusions on the weld surface are effectively eliminated, making the weld fit more closely to the pipe surface, reducing gaps, and improving the sealing of the weld. Through precise control of the grinding wheel, the system reduces the heat-affected zone during welding, helping to reduce the risk of welding deformation and cracks. At the same time, the knocking and cleaning process can release part of the welding stress and further reduce the risk of weld cracking. The knocking rod, under the action of the toggle rod and the first and second damping springs, performs reciprocating knocking and cleaning, effectively shaking off residual impurities from the pipe surface and improving the cleanliness of the weld.

[0025] Through the precise threaded connection between the first motor and the lead screw, the system can achieve precise control of the position of the moving frame. This design ensures that the gasket workpiece can be accurately installed at the required position, thereby improving the installation accuracy. The design of the support rod and the moving wheel enables the system to adapt to pipes of different diameters. The moving wheel can fit closely to the inner wall of the pipe and slide along it, thereby ensuring that the system can work effectively under various pipe sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the fixing assembly and the connecting member in the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the grinding and cleaning component and the liner workpiece in the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the driving member in the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the grinding wheel in the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the rotating frame and the supporting frame in the present invention;

[0032] Figure 7 It is a structural schematic diagram of the fan plate in the present invention;

[0033] Figure 8 It is a schematic diagram of the structure of the grinding wheel and the supporting frame in the present invention;

[0034] Fig. 9 It is a schematic diagram of the structure of the adjusting member and the knocking rod in the present invention.

[0035] In the figure: 1, circular frame; 2, positioning block; 3, fixing assembly; 4, connecting piece; 5, lining workpiece; 6, grinding and cleaning assembly; 31, disc; 32, cross bar; 33, fixing frame; 34, first motor; 35, screw rod; 36, moving frame; 37, first connecting rod; 38, supporting rod; 39, second motor; 310, first bevel gear set; 311, moving wheel; 41, vertical rod; 42, sliding rod; 43, second connecting rod; 61, third motor; 62, first gear; 63, first gear ring; 64, second gear; 65, second gear ring; 66, rotating frame; 67, slider; 68, cylinder; 69, supporting frame; 610, grinding wheel ;611, fourth motor;612, driving wheel;613, pushing rod;614, swing rod;615, fan plate;616, first rotating shaft;617, second bevel gear set;618, second rotating shaft;619, third bevel gear set;620, spline rod;621, third rotating shaft;622, double-head frame;623, first trapezoidal block;624, second trapezoidal block;625, mounting seat;626, moving rod;627, limiting plate;628, winding disc;629, first damping spring;630, protruding rod;631, toggle rod;632, knocking rod;633, second damping spring;634, pull rope;635, bracket. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] Embodiment 1: Combination Figure 1-Figure 9 As shown, the present invention provides a technical solution: a metal pipe welding device, comprising two symmetrically arranged circular frames 1 and a gasket workpiece 5, the inner end of the circular frame 1 is fixedly connected with a positioning block 2, and the outer side of the positioning block 2 is equipped with a fixing component 3, so as to accurately install the gasket workpiece 5 to the welding part of the pipe, in addition, the outer ends of the two circular frames 1 are provided with connecting pieces 4, and the gasket workpiece 5 is installed on the top of the connecting piece 4;

[0038] Between the two circular frames 1, a set of grinding and cleaning components 6 is specially arranged for performing detailed post-processing on the liner workpiece 5 after pipe welding. The core of this set of components is a third motor 61, which is located between the two positioning blocks 2. Drive members are installed on both sides of the third motor 61, and these drive members are equipped with a rotating frame 66. A support frame 69 is arranged at the outer end of the rotating frame 66, and a grinding wheel 610 for welding seam grinding is equipped on the top of the support frame 69;

[0039] In order to enhance the heat dissipation and dust removal capabilities of the device, rotatable fan plates 615 are also provided on both sides of the grinding wheel 610, and the outer ends of these fan plates 615 are also connected to knocking rods 632 for cleaning work;

[0040] The driving member includes a first gear 62 fixedly mounted on the output end of the third motor 61, the first gear 62 is meshed with a first gear ring 63 rotatably mounted on the inner end of the positioning block 2, the outer side of the first gear ring 63 is meshed with a second gear 64, and the second gear 64 is mounted on a rotating frame 66, and the second gear 64 is also meshed with a second gear ring 65 fixedly mounted on the connecting member 4, forming a complete transmission chain;

[0041] A circular groove is provided at the inner end of the circular frame 1, so that the rotating frame 66 can be slidably connected with the circular frame 1 in the circular groove through the slider 67. In addition, a cylinder 68 is fixedly connected to the rotating frame 66, and the output end of the cylinder 68 is fixedly connected to the support frame 69. The support frame 69 is also slidably connected with the rotating frame 66 through a guide rod, thereby ensuring the stability and flexibility of the structure.

[0042] The grinding wheel 610 is mounted on the support frame 69 through a mounting frame, and a fourth motor 611 is equipped on one side of the mounting frame. The two ends of the fourth motor 611 are connected to driving wheels 612. The two driving wheels 612 are connected by a push rod 613 to form a linkage structure. The other end of the push rod 613 is rotatably connected to a swing rod 614, and the swing rod 614 is fixedly connected to the fan plate 615. This design enables the fan plate 615 to swing when the driving wheel 612 rotates, thereby realizing the functions of heat dissipation and dust removal.

[0043] The outer end of the driving wheel 612 is fixedly connected to the first rotating shaft 616, which is connected to the second rotating shaft 618 through the second bevel gear set 617, and the second rotating shaft 618 is connected to the spline rod 620 and the third rotating shaft 621 through the third bevel gear set 619. This complex transmission design ensures efficient transmission and conversion of energy.

[0044] The second rotating shaft 618 is rotatably mounted on the support frame 69, and the two ends of the spline rod 620 are connected to the moving rod 626. The moving rod 626 is rotatably and slidably mounted on the support frame 69 through the mounting seat 625, so that the moving rod 626 can be moved and adjusted within a certain range. The two ends of the moving rod 626 are respectively fixedly connected to the limit plate 627 and the toggle rod 631. This design enables the movement of the moving rod 626 to drive the toggle rod 631 to perform corresponding actions;

[0045] In addition, a winding disk 628 is sleeved on the outer wall of the rotating frame 66, and the disk is rotatably mounted on the mounting seat 625. A first damping spring 629 is sleeved on the outer wall of the moving rod 626, and the spring is located between the limit plate 627 and the winding disk 628, which plays a role of buffering and stabilization. Lugs 630 are fixedly connected to both sides of the outer wall of the winding disk 628. The positions of these lugs correspond to the positions of the toggle rod 631. When the toggle rod 631 moves, it interacts with the lug 630, thereby driving the winding disk 628 to rotate.

[0046] Adjusting members corresponding to the positions of the toggle rod 631 are also provided on both sides of the support frame 69. These adjusting members can adjust the position and angle of the toggle rod 631 as needed, thereby realizing precise control of the performance of the equipment. A pull rope 634 is wound around the winding disk 628, and the other end of the pull rope 634 is fixedly connected to the knocking rod 632. When the winding disk 628 rotates, the knocking rod 632 is driven by the pull rope 634 to perform corresponding movement, thereby realizing the cleaning function.

[0047] The two sides of the support frame 69 are also fixedly connected to the bracket 635, and the knocking rod 632 is slidably mounted on the bracket 635 in the vertical direction, so that the knocking rod 632 can move up and down along the bracket 635. In addition, a second damping spring 633 is arranged between the knocking rod 632 and the bracket 635, which plays a role in buffering and stabilizing the knocking force, ensuring that the knocking rod 632 can work smoothly and powerfully during the knocking process;

[0048] The adjusting member includes a double-headed frame 622 fixedly mounted on the supporting frame 69, and a first trapezoidal block 623 and a second trapezoidal block 624 are fixedly mounted on both sides of the double-headed frame 622, respectively. The shapes and sizes of the two trapezoidal blocks correspond to each other, and the positions of the toggle rod 631 also correspond to each other. When the toggle rod 631 contacts the first trapezoidal block 623 or the second trapezoidal block 624 during movement, due to the inclined design of the trapezoidal block, the toggle rod 631 will be subjected to a lateral thrust or pull, thereby changing its position. This design allows the user to adjust the knocking force and frequency of the knocking rod 632 as needed, thereby achieving flexible response to different working conditions.

[0049] In the embodiment of the present invention, the third motor 61 and the fourth motor 611 are both dual-axis motors. The grinding and cleaning system is mainly composed of the third motor 61, the first gear 62, the first gear ring 63, the second gear ring 65, the second gear 64, the rotating frame 66, the grinding wheel 610 and other components. When the third motor 61 is started, it drives the first gear 62 to rotate synchronously. The rotation of the first gear 62 further drives the first gear ring 63 located on the positioning block 2 to rotate synchronously. During the rotation process, the first gear ring 63 and the second gear ring 65 cooperate with each other, so that the second gear 64 can rotate in a circle with the first gear ring 63 as the axis. This ingenious mechanical transmission design enables the rotating frame 66 to rotate synchronously with the rotation of the first gear ring 63, thereby driving the grinding wheel 610 to adjust its position. The system is also equipped with a fourth motor 611 for driving the grinding wheel 610. The grinding wheel 610 rotates synchronously with the driving wheel 612. The rotation of the grinding wheel 610 can adjust the grinding position of the weld to ensure that the burrs and protrusions on the weld surface are effectively eliminated. This grinding process makes the weld fit more closely to the pipe surface, reduces the gap, and thus improves the sealing of the weld. In addition, the precise control of the grinding wheel 610 also helps to reduce the heat-affected zone during welding and reduce the risk of welding deformation and cracks. This design enables the driving wheel 612 to cooperate with the push rod 613 to drive the swing rod 614 and the fan plate 615 to reciprocate while the grinding wheel 610 is grinding. The wind flow generated by the fan plate 615 during the rotation process can effectively blow away the impurities generated by grinding in time to keep the weld area clean. At the same time, the fan treatment can also accelerate the cooling speed of the weld, which helps to control the generation of welding deformation and cracks.

[0050] In addition, the driving wheel 612 is also connected to the spline rod 620 through a series of mechanical transmission devices (including the first rotating shaft 616, the second bevel gear set 617, the second rotating shaft 618, the third bevel gear set 619, and the third rotating shaft 621), so as to realize the synchronous rotation of the spline rod 620. The rotation of the spline rod 620 further drives the synchronous rotation of the moving rod 626 and the toggle rod 631. During the rotation process, the toggle rod 631 cooperates with the convex rod 630 to drive the winding disk 628 to rotate synchronously. The rotation of the winding disk 628 realizes the winding operation of the pull rope 634, and the pull rope 634 drives the knocking rod 632 to slide downward on the bracket 635. And compress the second damping spring 633. When the toggle rod 631 rotates to the position of the first trapezoidal block 623, the first trapezoidal block 623 will push the toggle rod 631 and the moving rod 626 to move outward on the spline rod 620 and compress the first damping spring 629. At this time, the toggle rod 631 no longer exerts a force on the protruding rod 630. The knocking rod 632 moves upward under the elastic force of the second damping spring 633 to knock and clean the polished pipe. This reciprocating knocking cleaning can effectively shake off residual impurities from the surface of the pipe and improve the cleanliness of the weld. At the same time, the knocking process can also release part of the welding stress and reduce the risk of weld cracking.

[0051] Embodiment 2: Combination Figure 2 As shown, on the basis of the first embodiment, the fixing assembly 3 includes a disc 31 rotatably mounted on the outer end of the positioning block 2, the outer end of the disc 31 is fixedly connected with three groups of cross bars 32, the three groups of cross bars 32 are slidably connected with a fixing frame 33, the outer end of the fixing frame 33 is rotatably connected with three groups of support rods 38, the support rods 38 are fixedly connected with a second motor 39, the output end of the second motor 39 is transmission-connected with a moving wheel 311 through a first bevel gear set 310, and the moving wheel 311 is rotatably mounted on the support rod 38;

[0052] A first motor 34 is fixedly installed at the other end of the three groups of cross bars 32, a screw rod 35 is fixedly connected to the output end of the first motor 34, and the other end of the screw rod 35 is rotatably connected to the fixed frame 33, a movable frame 36 is threadedly connected to the outer wall of the screw rod 35, and three groups of first connecting rods 37 are rotatably connected to the outer end of the movable frame 36, and the other end of the first connecting rod 37 is rotatably connected to the support rod 38.

[0053] In the embodiment of the present invention, when the first motor 34 is started, the screw rod 35 will rotate synchronously. The screw rod 35 and the moving frame 36 are connected by a precise threaded connection to ensure that the rotation of the screw rod 35 can be accurately converted into the sliding of the moving frame 36 on the cross bar 32, thereby ensuring the stability of the transmission. When it is necessary to install a gasket on the pipeline welding part, we first need to control the moving frame 36 to move toward the side of the fixed frame 33. By adjusting the first motor 34, we can accurately control the moving speed and distance of the moving frame 36. When the moving frame 36 moves to a suitable position, it will cooperate with the first connecting rod 37 to push the support rod 38 to move outward. The movement of the support rod 38 will drive the moving wheel 311 to fit closely with the inner wall of the pipeline and slide along the inner wall of the pipeline. This design enables the device to adapt to pipelines of different diameters and ensure that the moving wheel 311 always maintains close contact with the inner wall of the pipeline. At the same time, since the friction of the moving wheel 311 is small, the device will not cause damage to the pipeline during movement.

[0054] When it is necessary to adjust the position of the liner workpiece 5, we can achieve it by turning on the second motor 39. The second motor 39 is connected to the moving wheel 311 through a transmission device, so that the rotation of the second motor 39 can drive the moving wheel 311 to rotate synchronously. Since the moving wheel 311 slides in contact with the inner wall of the pipe, its rotation will drive the entire device to move along the inner wall of the pipe. By precisely controlling the rotation speed and direction of the second motor 39, we can achieve precise adjustment of the position of the liner workpiece 5.

[0055] Example 3: Combination Figure 2 As shown, on the basis of embodiment 2, the connecting member 4 includes a vertical rod 41 fixedly mounted on the outer end of the disc 31, a sliding rod 42 is slidably connected to the surface of the vertical rod 41, and the cushion workpiece 5 is arranged on the top of the connecting member 4, and a second connecting rod 43 is rotatably connected to the side wall of the sliding rod 42, and the other end of the second connecting rod 43 is rotatably connected to the support rod 38.

[0056] In an embodiment of the present invention, when the support rod 38 rotates, the support rod 38 cooperates with the second connecting rod 43 to drive the sliding rod 42 to move up and down, thereby driving the lining workpiece 5 to move up and down, and then installing the lining workpiece 5 to the position of the pipeline weld.

[0057] The present invention also discloses a metal pipe welding method, which specifically comprises the following steps:

[0058] Step 1, after placing the device in the pipeline, the first motor 34 is turned on to drive the screw rod 35 to rotate synchronously, and the screw rod 35 drives the moving frame 36 to slide on the cross bar 32. When it is necessary to install a gasket on the pipeline welding part, the first motor 34 and the screw rod 35 are used to control the moving frame 36 to move toward the side of the fixed frame 33, so that the moving frame 36 cooperates with the first connecting rod 37 to push the support rod 38 to move outward, thereby driving the moving wheel 311 to slide in contact with the inner wall of the pipeline. When it is necessary to adjust the position of the gasket workpiece 5, the second motor 39 is turned on to cooperate with the moving wheel 311 to rotate synchronously. Since the moving wheel 311 slides in contact with the inner wall of the pipeline, the gasket workpiece 5 is driven to move, and the position of the gasket workpiece 5 can be adjusted according to the position of the weld.

[0059] Step 2: When the support rod 38 rotates, the support rod 38 cooperates with the second connecting rod 43 to drive the sliding rod 42 to move up and down, thereby driving the lining workpiece 5 to move up and down, and then installing the lining workpiece 5 to the position of the pipeline weld;

[0060] Step 3: Turn on the third motor 61 to drive the first gear 62 to rotate synchronously. The first gear 62 drives the meshing first gear ring 63 located on the positioning block 2 to rotate synchronously. During the rotation process, the first gear ring 63 cooperates with the second gear ring 65 to drive the meshing second gear 64 to rotate in a circle with the first gear ring 63 as the axis. When the first gear ring 63 rotates in a circle, it can drive the rotating frame 66 to rotate synchronously, thereby driving the grinding wheel 610 to rotate synchronously, and then adjust the grinding position of the grinding wheel 610 on the weld. Turn on the fourth motor 611 to drive the grinding wheel 610 and the driving wheel 612 rotates synchronously, the grinding wheel 610 grinds the weld, and at the same time, the fourth motor 611 can drive the driving wheel 612 to rotate synchronously, and the driving wheel 612 cooperates with the pushing rod 613 to drive the swing rod 614 and the fan plate 615 to rotate back and forth, so that the fan plate 615 can generate wind flow, and the impurities generated by the grinding can be blown away in time; at the same time, the driving wheel 612 drives the spline rod 620 to rotate synchronously through the first rotating shaft 616, the second bevel gear set 617, the second rotating shaft 618, the third bevel gear set 619, and the third rotating shaft 621, and the spline rod 620 rotates synchronously. When rotating, it can drive the moving rod 626 to rotate synchronously, and the moving rod 626 drives the toggle rod 631 to rotate synchronously, so that when the toggle rod 631 rotates, it cooperates with the convex rod 630 to drive the winding disk 628 to rotate synchronously, and the winding disk 628 realizes the winding of the pull rope 634 during the rotation process. At the same time, the pull rope 634 drives the knocking rod 632 located on the bracket 635 to slide downward and compress the second damping spring 633. As the toggle rod 631 rotates to the position of the first trapezoidal block 623, the first trapezoidal block 623 pushes the toggle rod 631 and the moving rod 626 located at the spline rod 620 The toggle rod 631 moves upward and outward and compresses the first damping spring 629. When the toggle rod 631 slides over the first trapezoidal block 623, the toggle rod 631 no longer exerts a force on the protruding rod 630. The knocking rod 632 moves upward under the elastic force of the second damping spring 633, so that the knocking rod 632 knocks and cleans the polished pipe. The toggle rod 631, under the elastic force of the first damping spring 629, cooperates with the limit plate 627 and the moving rod 626 to drive the toggle rod 631 to reset, and so on and so forth, thereby realizing reciprocating knocking and cleaning of the polished pipe.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal pipe welding device, comprising two symmetrically arranged circular frames (1) and a gasket workpiece (5), characterized in that: A positioning block (2) is fixedly connected to the inner end of the circular frame (1); a fixing component (3) for mounting the liner workpiece (5) to the position of the pipe welding position is provided at the outer end of the positioning block (2); a connecting piece (4) is provided at the outer ends of the two circular frames (1), and the liner workpiece (5) is mounted on the top of the connecting piece (4); and a grinding and cleaning component (6) for post-processing the liner workpiece (5) after pipe welding is provided between the two circular frames (1); The grinding and cleaning assembly (6) comprises a third motor (61) located between the two positioning blocks (2), a driving member is arranged on both sides of the third motor (61), a rotating frame (66) is arranged on the driving member, a support frame (69) is arranged at the outer end of the rotating frame (66), a grinding wheel (610) for grinding the weld is arranged on the top of the support frame (69), fan plates (615) for heat dissipation and dust removal are rotatably arranged on both sides of the grinding wheel (610), and a knocking rod (632) for cleaning is arranged at the outer end of the fan plate (615); The driving member comprises a first gear (62) fixedly mounted on the output end of the third motor (61), the outer end of the first gear (62) being meshingly connected to a first gear ring (63) rotatably mounted on the inner end of the positioning block (2), the outer end of the first gear ring (63) being meshingly connected to a second gear (64), and a rotating frame (66) being mounted on the second gear (64), and the outer end of the second gear (64) being meshingly connected to a second gear ring (65) fixedly mounted on the connecting member (4); A circular groove is provided at the inner end of the circular frame (1); the rotating frame (66) is located in the circular groove and is slidably connected to the circular frame (1) via a slider (67); a cylinder (68) is fixedly connected to the rotating frame (66); an output end of the cylinder (68) is fixedly connected to a support frame (69); and the support frame (69) is slidably connected to the rotating frame (66) via a guide rod; a grinding wheel (610) is mounted on the support frame (69) via a mounting frame; a fourth motor (611) is provided on one side of the mounting frame; driving wheels (612) are provided at both ends of the fourth motor (611); a push rod (613) is rotatably connected to a position between the driving wheels (612) offset from the center of the circle; a swing rod (614) is rotatably connected to the other end of the push rod (613); and the swing rod (614) is fixedly connected to the fan plate (615); The outer end of the driving wheel (612) is fixedly connected to a first rotating shaft (616); the first rotating shaft (616) is transmission-connected to a second rotating shaft (618) via a second bevel gear set (617); the second rotating shaft (618) is transmission-connected to a spline rod (620) and a third rotating shaft (621) via a third bevel gear set (619); The two ends of the spline rod (620) are connected to a moving rod (626), and the moving rod (626) is rotatably and slidably mounted on the support frame (69) through a mounting seat (625). The two ends of the moving rod (626) are respectively fixedly connected to a limit plate (627) and a toggle rod (631). The outer wall of the rotating frame (66) is provided with a winding disk (628), and the outer wall of the moving rod (626) is provided with a first damping spring (629). Both sides of the outer wall of the winding disk (628) are fixedly connected to convex rods (630). ), adjusting members corresponding to the positions of the toggle rod (631) are arranged on both sides of the support frame (69), a pull rope (634) is wound around the winding disk (628), the other end of the pull rope (634) is fixedly connected to the knocking rod (632), brackets (635) are fixedly connected to both sides of the support frame (69), and the knocking rod (632) is slidably mounted on the bracket (635) in the vertical direction, and a second damping spring (633) is arranged between the knocking rod (632) and the bracket (635).

2. A metal pipe welding device according to claim 1, characterized in that: The adjusting member comprises a double-head frame (622) fixedly mounted on a support frame (69), a first trapezoidal block (623) and a second trapezoidal block (624) being fixedly mounted on both sides of the double-head frame (622), the positions of the first trapezoidal block (623) and the second trapezoidal block (624) corresponding to the position of the toggle rod (631), and the first trapezoidal block (623) and the second trapezoidal block (624) being centrally symmetrically arranged.

3. A metal pipe welding device according to claim 2, characterized in that: The fixing assembly (3) comprises a disc (31) rotatably mounted on the outer end of the positioning block (2); the outer end of the disc (31) is fixedly connected to three groups of cross bars (32); the three groups of cross bars (32) are slidably connected to a fixing frame (33); the outer end of the fixing frame (33) is rotatably connected to three groups of support bars (38); the support bars (38) are fixedly connected to a second motor (39); and the output end of the second motor (39) is transmission-connected to a moving wheel (311) via a first bevel gear set (310).

4. A metal pipe welding device according to claim 3, characterized in that: A first motor (34) is fixedly mounted on the other end of the three groups of cross bars (32); a screw rod (35) is fixedly connected to the output end of the first motor (34); the other end of the screw rod (35) is rotatably connected to the fixed frame (33); the outer wall of the screw rod (35) is threadedly connected to a movable frame (36); the outer end of the movable frame (36) is rotatably connected to three groups of first connecting rods (37); the other end of the first connecting rod (37) is rotatably connected to a support rod (38).

5. A metal pipe welding device according to claim 4, characterized in that: The connecting member (4) comprises a vertical rod (41) fixedly mounted on the outer end of the disc (31), a sliding rod (42) being slidably connected to the surface of the vertical rod (41), and a liner workpiece (5) being arranged on the top of the connecting member (4), a side wall of the sliding rod (42) being rotatably connected to a second connecting rod (43), and the other end of the second connecting rod (43) being rotatably connected to the support rod (38).

6. A welding method for a metal pipe welding device according to claim 5, characterized in that: The specific steps include: Step 1: The first motor (34) and the screw rod (35) are used to drive the moving frame (36) to slide on the cross bar (32), and the first connecting rod (37) and the support rod (38) are used to adjust the moving wheel (311) to fit the inner wall of the pipe, thereby adjusting the position of the liner workpiece (5); the second motor (39) rotates synchronously with the moving wheel (311), so that the liner workpiece (5) moves according to the position of the weld; Step 2: When the support rod (38) rotates, the second connecting rod (43) drives the sliding rod (42) to move up and down, thereby adjusting the height of the liner workpiece (5) and installing it at the position of the pipeline weld; Step 3: The third motor (61) drives the first gear (62) to rotate, and through the cooperation of the first gear ring (63) and the second gear ring (65), drives the second gear (64) and the rotating frame (66) to rotate in a circle, thereby adjusting the grinding position of the grinding wheel (610). The fourth motor (611) drives the grinding wheel (610) and the driving wheel (612) to rotate synchronously to grind the weld, and uses the fan plate (615) to generate airflow to blow away the grinding impurities. At the same time, the driving wheel (612) drives the spline rod (620) to rotate through a series of gear sets, and then through the cooperation of the toggle rod (631), the winding disk (628) and the pull rope (634), the reciprocating knocking action of the knocking rod (632) is realized, and the polished pipeline is knocked and cleaned.

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