A welding method and welding apparatus for repairing hot-rolled mandrels of seamless steel pipes.

Abstract

This invention discloses a welding method and apparatus for repairing hot-rolled mandrels of seamless steel pipes. The apparatus includes a machine base, a control box fixedly connected to the top of the machine base, and a clamping seat rotatably connected to the outer surface of the control box. It also includes an auxiliary component fixedly connected to the top of the control box; a screw rotatably connected to the top of the machine base, a displacement seat rotatably connected to the outer surface of the screw, an installation component rotatably connected to the top of the displacement seat, and a welder fixedly connected to the outer surface of the installation component. This invention relates to the field of welding equipment technology. The welding method and apparatus for repairing hot-rolled mandrels of seamless steel pipes adjust the welding position as the displacement seat moves, facilitating adjustment of the welding position during mandrel welding and preventing omissions during the welding process. Three welders are installed on the installation component to ensure stable welding of the mandrel when three welders are used.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to a welding method and apparatus for repairing hot-rolled mandrels of seamless steel pipes. Background Technology

[0002] Hardfacing, as an economical and rapid process for material surface modification, involves melting metal using electric or gas welding and depositing it onto tool or machine parts. It is typically used to repair worn and cracked parts. Existing mandrels are mostly single-use; once defects such as reduced diameter, surface cracks, or scratches appear, they are scrapped, resulting in wasted materials and time. Current mandrel repair methods in the industry are simply patch welding operations, lacking clear specifications and requirements for repair materials, processes, and post-treatment. This leads to repaired mandrels not meeting expected lifespans. Furthermore, equipment often misses parts during repair, reducing the repair effectiveness and requiring secondary repairs. Adjusting or replacing repaired parts is difficult, necessitating disassembly and repositioning of the mandrel during repair, increasing the difficulty of hardfacing. Additionally, it's difficult to collect fallen weld slag during hardfacing, causing it to accumulate and hinder equipment movement.

[0003] In summary, the equipment is prone to omissions when repairing mandrels, which reduces the repair effect and requires secondary repair of the mandrel after initial repair. Furthermore, it is difficult to adjust or replace repaired parts during the repair process, necessitating disassembly and reassembly of the mandrel to replace the welded areas. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this invention is as follows: A welding device for repairing hot-rolled mandrels of seamless steel pipes, comprising a base, a control box fixedly connected to the top of the base, a groove formed below the mandrel welding position on the base, and a clamping seat rotatably connected to the outer surface of the control box, further comprising:

[0005] An auxiliary component, which is fixedly connected to the top of the control box, is used to purify the air during the welding process.

[0006] A screw is rotatably connected to the top of the machine base. The screw is used to adjust the position of the weld overlay. A drive motor is fixedly connected to one end of the screw. A displacement seat is rotatably connected to the outer surface of the screw. An installation assembly is rotatably connected to the top of the displacement seat. A welder is fixedly connected to the outer surface of the installation assembly. Three welders are set on the installation assembly and are distributed in a circle on the installation assembly.

[0007] A collection component is fixedly connected to the bottom of the machine base cavity. The collection component is used to collect the welding slag that falls off during the welding process. The collection component is located below the mandrel welding position.

[0008] The mounting assembly includes a mounting cylinder rotatably connected to the top of the displacement seat, a rotary motor fixedly connected to the bottom end of the mounting cylinder, the outer surface of the rotary motor fixedly connected to the displacement seat, the mounting cylinder being used to adjust the position of the welder, a fixing block fixedly connected to the top end of the mounting cylinder, and a barrier sleeve fixedly connected to the bottom of the inner cavity of the mounting cylinder.

[0009] An air supply duct is fixedly connected to the top of the inner cavity of the mounting cylinder. The air supply duct is used to blow the mandrel after the welding is completed. Side support plates are fixedly connected to the outer surface of the air supply duct. The side support plates are distributed in a circular pattern on the air supply duct. Air guide pipes are connected to the air supply duct at the position away from the side support plates. Three air guide pipes are set on the air supply duct and are distributed in a circular pattern on the air supply duct.

[0010] Preferably, the side support plate is fixedly connected to the mounting cylinder at a position away from the air supply duct, and the bottom end of the fixing block is fixedly connected to the air supply duct.

[0011] Preferably, the bottom of the displacement seat is slidably connected to the machine base, and the outer surface of the welder penetrates the mounting cylinder.

[0012] Preferably, the side of the clamping seat away from the mounting cylinder passes through the control box and extends into the control box, and the bottom of the auxiliary component passes through the control box and extends into the control box.

[0013] Preferably, a central fixing plate is fixedly connected to the inner surface of the barrier sleeve, and a side connecting block is fixedly connected to the top of the central fixing plate;

[0014] The pressing plate is fixedly connected to the central solid plate near the side connecting block. Two pressing plates and two side connecting blocks are set on the central solid plate, and the two pressing plates are installed opposite each other. A support frame is fixedly connected to the top of the pressing plate, and a connecting plate is fixedly connected to the top of the support frame. The top of the connecting plate is slidably connected to the air supply tube.

[0015] Preferably, the top of the connecting plate extends to the outside of the barrier sleeve, and the bottom of the support frame is slidably connected to the side connecting block.

[0016] Preferably, the auxiliary component includes a bracket, which is fixedly connected to the top of the control box, and a blocking ring is fixedly connected to the top of the bracket, with a purification cylinder slidably connected to the inner surface of the blocking ring;

[0017] An auxiliary block is fixedly connected to the inner surface of the support. A buffer block is fixedly connected to the top of the auxiliary block. A spring is connected between the buffer block and the auxiliary block. The two ends of the spring are fixedly connected to the buffer block and the auxiliary block respectively. An auxiliary rod is fixedly connected to the auxiliary block near the support. The auxiliary rods are distributed in a circle on the auxiliary block, and three auxiliary rods are provided.

[0018] Preferably, the bottom of the auxiliary block is fixedly connected to the control box, and the top of the buffer block is slidably connected to the purification cylinder.

[0019] Preferably, the collecting component includes an abutment plate, which is fixedly connected to the bottom of the inner cavity of the base, a connecting plate is fixedly connected to the outer surface of the abutment plate, and an arc-shaped plate is fixedly connected to the top of the abutment plate;

[0020] An extraction cylinder is fixedly connected to the abutment plate near the arc-shaped plate. The extraction cylinder is used to extract the fumes generated during welding. A limiting frame is fixedly connected to the outer surface of the extraction cylinder. The bottom of the limiting frame is fixedly connected to the abutment plate. A collection shell is fixedly connected to the extraction cylinder away from the limiting frame.

[0021] Preferably, a limiting sleeve is fixedly connected to the bottom of the inner cavity of the limiting frame, and a reset plate is fixedly connected to the top of the limiting sleeve. The reset plates are distributed in a circular pattern on the limiting sleeve, and a mating plate is fixedly connected to the top of the reset plate. The outer surface of the mating plate is slidably connected to the limiting frame.

[0022] A lifting plate is slidably connected to the bottom of the inner cavity of the limiting frame. A fixed rod is fixedly connected to the top of the lifting plate, and a movable plate is fixedly connected to the top of the fixed rod. The outer surface of the movable plate is slidably connected to the limiting frame.

[0023] This invention provides a method and apparatus for overlay welding to repair hot-rolled mandrels of seamless steel pipes. It offers the following advantages:

[0024] 1. The surfacing welding method and device for repairing hot-rolled mandrels of seamless steel pipes includes a welder, a displacement seat, and a clamping seat. The clamping seat is horizontally installed on the control box, allowing the control box to control the clamping of the clamping seat. This ensures the stability of the clamping seat in holding the mandrel and guarantees the accuracy of the surfacing welding. The surfacing position is adjusted by moving the displacement seat, facilitating the adjustment of the surfacing position during mandrel surfacing and preventing omissions during the surfacing process. Three welders are installed on the mounting assembly to ensure stable surfacing of the mandrel when three welders are used, avoiding cracking problems after the welder surfacing the mandrel.

[0025] 2. The overlay welding method and device for repairing hot-rolled mandrels of seamless steel pipes are described. The installation cylinder is vertically installed on the displacement seat, which facilitates the movement of the welding machine by the installation cylinder. This prevents the mandrel from tilting during overlay welding, which would affect the overlay welding of the mandrel. The side support plate and the fixing block cooperate to fix the air supply duct, making it less likely for the air supply duct to loosen in its installation position inside the installation cylinder. Thus, the fixing block and the side support plate are used for support, and the air supply duct and the side support plate cooperate to divide the active space inside the installation cylinder.

[0026] 3. The overlay welding method and device for repairing hot-rolled mandrels of seamless steel pipes generate air force inside the installation cylinder through an air supply duct and deliver it to the air guide pipe. The air force flowing inside the installation cylinder flows through the grooves in the installation cylinder, thereby blowing away the residual welding slag when the air force flows to the mandrel overlay position. The air guide pipe discharges air close to the barrier sleeve, so that the air flow can quickly enter the barrier sleeve, which facilitates the air guide pipe to guide the discharge of air force and increases the contact area inside the installation cylinder.

[0027] 4. The overlay welding method and device for repairing the hot-rolled mandrel of the seamless steel pipe, by dividing the inside of the barrier sleeve through the middle solid plate, thereby using the installation position of the middle solid plate to play a restrictive role inside the barrier sleeve, so that the middle solid plate can block the flow of air. The connecting plate can knock the air supply tube, so that the dust adhering to the air supply tube is knocked off, which helps to keep the air supply tube clean. In addition, the connecting plate connects two support frames, and the tilting of the connecting plate drives the support frames to move.

[0028] 5. The overlay welding method and device for repairing the hot-rolled mandrel of the seamless steel pipe include two pressing plates on the central solid plate, which facilitate the extension and retraction of the pressing plates to support the support frame, thereby increasing the load-bearing capacity of the support frame and ensuring the stability of the support frame during movement. Two side connecting blocks are also provided on the central solid plate, which can restrict the contraction of the pressing plates and guide the side connecting blocks when they contact the support frame, ensuring that the pressing plates are squeezed when the support frame moves.

[0029] 6. The welding method and device for repairing hot-rolled mandrels of seamless steel pipes, wherein the purification cylinder is fixed by a bracket on the control box in cooperation with the blocking ring, which facilitates the placement of the purification cylinder by the blocking ring, thereby increasing the load-bearing capacity of the blocking ring on the bracket and preventing the blocking ring from breaking under pressure and causing the purification cylinder to fall. Activated carbon is placed inside the purification cylinder, so that the purification cylinder placed on the blocking ring can purify the air around the equipment and prevent the generation of odors during the mandrel welding process from affecting the use of the equipment.

[0030] 7. The overlay welding method and device for repairing the hot-rolled mandrel of the seamless steel pipe, wherein the control box and the bracket are connected by an auxiliary block, which facilitates the increase of the contact area of ​​the auxiliary block, and the installation position of the purification cylinder can be restricted by the auxiliary rod, so that the auxiliary rod and the auxiliary block cooperate with each other for reinforcement. The buffer block has a spring, so that the buffer block is shaken and raised and lowered under the action of the spring. The rise and fall of the buffer block knocks the purification cylinder, which facilitates the movement of the purification cylinder when the buffer block knocks, so that the rise and fall of the buffer block is not prone to tilting and affecting the support of the buffer block.

[0031] 8. The overlay welding method and device for repairing hot-rolled mandrels of seamless steel pipes are provided. The abutment plate is installed inside the machine base, which facilitates the abutment plate to restrict the collection space inside the machine base. The collection shell collects on the abutment plate, which facilitates the movement space between the collection shell and the abutment plate, so that the collection shell can fully collect the welding slag. The collection shell has a buffer pad inside, which makes it less likely for the welding slag to bounce when it comes into contact with the welding slag, thus reducing the difficulty of subsequent welding slag cleaning.

[0032] 9. The overlay welding method and device for repairing hot-rolled mandrels of seamless steel pipes, wherein an arc-shaped plate is located between the abutment plate and the collection shell, which facilitates the entry of some of the falling welding slag into the groove of the machine base, preventing the welding slag from scattering everywhere and affecting subsequent cleaning. The extraction cylinder can generate suction on the abutment plate, so that the suction generated by the extraction cylinder flows on the collection shell, which facilitates the suction flow of the extraction cylinder and the collection shell to assist in the collection of welding slag, preventing the flue gas from flowing everywhere and affecting air purification.

[0033] 10. The overlay welding method and device for repairing hot-rolled mandrels of seamless steel pipes, wherein the installation position of the extraction cylinder is reinforced by a limiting frame on the abutment plate, which facilitates the installation position of the limiting frame to restrict the extraction cylinder and prevents the extraction cylinder from shifting on the abutment plate and affecting the collection of welding slag. The reset plate supports the mating plate on the limiting sleeve, so that the reset plate can expand and contract under the pressure of the mating plate, which facilitates the expansion and contraction of the reset plate to drive the mating plate to move, and prevents the limiting sleeve from shifting and affecting the position of the mating plate. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a structural schematic diagram of the invention from another perspective;

[0036] Figure 3 This is a schematic diagram of the structure of the mounting component of the present invention;

[0037] Figure 4 This is a schematic diagram of the barrier sleeve of the present invention;

[0038] Figure 5 This is a schematic diagram of the solid disk structure in this invention;

[0039] Figure 6 This is a schematic diagram of the structure of the auxiliary component of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of the bracket of the present invention;

[0041] Figure 8 This is an enlarged view of the auxiliary rod of the present invention;

[0042] Figure 9 This is a schematic diagram of the structure of the components used in this invention;

[0043] Figure 10 This is a structural schematic diagram of the collection component from another perspective of the present invention;

[0044] Figure 11 This is a schematic diagram of the structure of the limiting frame of the present invention;

[0045] Figure 12 This is an enlarged view of the reset plate of the present invention.

[0046] In the diagram: 1. Base; 2. Control box; 3. Clamping seat; 4. Auxiliary components; 41. Purification cylinder; 42. Baffle ring; 43. Bracket; 44. Auxiliary block; 45. Buffer block; 46. Auxiliary rod; 5. Mounting components; 51. Fixing block; 52. Air supply duct; 53. Side support plate; 54. Mounting cylinder; 55. Air guide tube; 56. Barrier sleeve; 561. Central solid plate; 562. Connecting plate; 563. Side connecting block; 564. Pressing plate; 565. Support frame; 6. Collection components; 61. Abutment plate; 62. Arc plate; 63. Collection shell; 64. Connecting plate; 65. Extraction cylinder; 66. Limiting frame; 661. Lifting plate; 662. Fixing rod; 663. Movable plate; 664. Limiting sleeve; 665. Reset plate; 666. Mating plate; 7. Displacement seat; 8. Screw; 9. Welding device. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0048] Example 1, please refer to Figures 1-12This invention provides a technical solution: a welding device for repairing hot-rolled mandrels of seamless steel pipes, including a base 1. A control box 2 is fixedly connected to the top of the base 1. A groove is formed below the mandrel welding position of the clamping seat 3 on the base 1, allowing the groove to collect welding slag and preventing it from scattering on the base 1, which would increase the difficulty of collection. Furthermore, the groove position of the base 1 can limit the movement distance of the displacement seat 7, causing the displacement seat 7 to gradually stop when it approaches the groove. This allows the base 1 and the control box 2 to cooperate in a limiting effect, preventing... To prevent displacement of components mounted on the base 1 from affecting the accuracy of welding, a clamping seat 3 is rotatably connected to the outer surface of the control box 2. The clamping seat 3 is horizontally mounted on the control box 2, allowing the control box 2 to control the clamping of the clamping seat 3. This facilitates maintaining the stability of the clamping seat 3 in holding the mandrel. The rotation of the mandrel driven by the clamping seat 3 allows for adjustment of the subsequent welding position of the mandrel, ensuring accuracy during welding. Furthermore, the operation of the clamping seat 3 and the equipment is controlled by the control box 2, facilitating the removal and placement of the mandrel held by the clamping seat 3. The system also includes:

[0049] Auxiliary component 4 is fixedly connected to the top of control box 2 and is used to purify the air during welding operations.

[0050] The screw 8 is rotatably connected to the top of the base 1. The screw 8 is used to adjust the position of the weld overlay. Driven by a motor, the screw 8 rotates clockwise on the base 1, causing the displacement seat 7 to move closer to the control box 2. This movement of the displacement seat 7 adjusts the weld overlay position, facilitating the adjustment during mandrel welding and preventing any omissions, ensuring thorough welding. Counterclockwise rotation of the screw 8 moves the displacement seat 7 away from the control box 2. As the displacement seat 7 moves the mounting assembly 5 away from the control box 2, the movement of the mounting assembly 5 on the displacement seat 7 is less affected. The rotation of the screw 8 guides the displacement seat 7, preventing it from being obstructed. If tilting or jamming occurs when moving on the base 1, the outer surface of the screw 8 is rotatably connected to the displacement seat 7, and the top of the displacement seat 7 is rotatably connected to the mounting assembly 5. The outer surface of the mounting assembly 5 is fixedly connected to the welder 9. Three welders 9 are set on the mounting assembly 5, so that the three welders 9 sequentially use low alloy welding wire, medium-low alloy welding wire and high alloy welding wire to carry out the surfacing work. This ensures that the three welders 9 can stably surfacing the mandrel when surfacing the mandrel, and avoids the problem of cracking after the welders 9 surfacing the mandrel. In addition, the use of the three welders 9 is adjusted with the clockwise rotation of the mounting assembly 5, so that the welders 9 are not prone to excessive rotation angle during the adjustment process, thereby avoiding the deviation of the contact between the welder 9 and the mandrel.

[0051] The collecting component 6 is fixedly connected to the bottom of the inner cavity of the base 1. The collecting component 6 is used to collect the welding slag that falls off during the welding process of the welder 9. By installing the collecting component 6 inside the groove of the base 1, the collecting component 6 can collect the falling welding slag, which is convenient for the welding slag collected by the base 1 to be removed together during cleaning, ensuring quick cleaning of welding slag. The collecting component 6 can also buffer when it comes into contact with the welding slag, so that the welding slag is less likely to splash during collection. The collecting component 6 is located below the mandrel welding position, so that the collecting component 6 corresponds to the mandrel held by the clamping seat 3.

[0052] The mounting assembly 5 includes a mounting cylinder 54, which is rotatably connected to the top of the displacement seat 7. The mounting cylinder 54 is vertically mounted on the displacement seat 7, allowing it to rotate under the influence of a rotary motor. This allows for directional adjustment of the mounting cylinder 54, facilitating the movement of the welding device 9. Furthermore, the position of the welding device 9 on the mounting cylinder 54 is higher than the clamping position of the mandrel, minimizing interference during the welding process and preventing tilting that could affect the welding of the mandrel. The mounting cylinder 54 is used for welding... The position of the device 9 is adjusted. A fixing block 51 is fixedly connected to the top of the mounting cylinder 54. A blocking sleeve 56 is fixedly connected to the bottom of the inner cavity of the mounting cylinder 54. The blocking sleeve 56 is inside the mounting cylinder 54, which can reinforce the bottom of the mounting cylinder 54 and prevent the position of the mounting cylinder 54 connecting the rotary motor and the displacement seat 7 from being affected. The blocking sleeve 56 can also guide the air flowing through the mounting cylinder 54, so that the wind can flow through the blocking sleeve 56, which can increase the contact area inside the mounting cylinder 54.

[0053] An air supply duct 52 is fixedly connected to the top of the inner cavity of the mounting cylinder 54. Airflow generated inside the mounting cylinder 54 is delivered to the air guide duct 55, which then discharges the airflow into the mounting cylinder 54. The airflow within the mounting cylinder 54 flows through grooves, effectively blowing away residual weld slag when it reaches the mandrel welding position. This cleaning effect on the mandrel after welding is achieved. The air supply duct 52 is used to blow away the mandrel after welding. A side support plate 53 is fixedly connected to the outer surface of the air supply duct 52. The side support plate 53 and the fixing block 51 cooperate to secure the air supply duct 52, preventing it from loosening inside the mounting cylinder 54. The fixing block 51 and the side support plate 53 further enhance the stability of the air supply duct. The support plate 53 increases the load-bearing capacity of the mounting cylinder 54 and prevents dents or bends on the surface of the mounting cylinder 54 from affecting the operation of the welder 9. The side support plate 53 restricts the installation position of the air supply duct 52 inside the mounting cylinder 54, so that the air supply duct 52 and the side support plate 53 cooperate to divide the internal space of the mounting cylinder 54. The air supply duct 52 is connected to the air guide pipe 55 at the position away from the side support plate 53. Three air guide pipes are set on the air supply duct 52 to facilitate the air flow to different positions inside the mounting cylinder 54 when the air flow is in the air guide pipe 55, ensuring the air flow inside the mounting cylinder 54. The position where the air flow is discharged by the air guide pipe 55 is close to the blocking sleeve 56, so that the air flow can quickly enter the blocking sleeve 56 when the air flow is in the air guide pipe 55, which facilitates the air flow to be guided by the air guide pipe 55.

[0054] The side support plate 53 is fixedly connected to the mounting cylinder 54 at a position away from the air supply duct 52, and the bottom end of the fixing block 51 is fixedly connected to the air supply duct 52.

[0055] The bottom of the displacement seat 7 is slidably connected to the base 1, and the outer surface of the welder 9 penetrates the mounting cylinder 54.

[0056] The clamping seat 3 extends through the control box 2 and into the control box 2 on the side away from the mounting cylinder 54, and the bottom of the auxiliary component 4 extends through the control box 2 and into the control box 2.

[0057] The inner surface of the barrier sleeve 56 is fixedly connected to a central fixing plate 561. The central fixing plate 561 divides the interior of the barrier sleeve 56, reinforcing the position of the barrier sleeve 56 near the mounting cylinder 54. The installation position of the central fixing plate 561 restricts airflow within the barrier sleeve 56, effectively blocking the flow of wind. The central fixing plate 561 is horizontally installed, and a side connecting block 563 is fixedly connected to its top. The side connecting block 563 further reinforces the central fixing plate 56. Two side blocks 563 are provided on 61 to restrict the retraction of the pressing plate 564. This allows the side blocks 563 to guide the pressing plate 564 when they contact the support frame 565, ensuring that the pressing plate 564 is squeezed when the support frame 565 moves. The side blocks 563 and the pressing plate 564 cooperate with each other between the support frame 565 and the central solid plate 561 to support the support frame 565 and prevent the central solid plate 561 from tilting and affecting the extension and retraction of the pressing plate 564. This allows the side blocks 563 to be installed vertically on the central solid plate 561.

[0058] The pressing plate 564 is fixedly connected to the central fixed plate 561 near the side connecting block 563. Two pressing plates 564 are provided on the central fixed plate 561, allowing the pressing plates 564 to extend and retract under the pressure of the support frame 565. This extension and retraction of the pressing plates 564 supports the support frame 565, thereby increasing the load-bearing capacity of the support frame 565 and ensuring its stability during movement. The extension and retraction of the pressing plates 564 cooperates with the connecting plate 562 to provide a blocking effect. The pressing plates 564 are also elastic, allowing them to push the support frame 565 back to its original position. The top of the pressing plate 564 is fixedly connected to the support frame 565, and the top of the support frame 565 is fixedly connected to the connecting plate 562. The connecting plate 562 contacts the air supply duct 52, allowing the connecting plate 562 to be subjected to airflow. The force of the airflow causes the connecting plate 562 to move up and down, facilitating the separation of the connecting plate 562 from the air supply duct 52. When the connecting plate 562 re-contacts the air supply duct 52, the connecting plate 562 can tap the air supply duct 52, causing the dust adhering to the air supply duct 52 to fall off, thus keeping the air supply duct 52 clean. The connecting plate 562 connects two support frames 565, allowing the connecting plate 562 to move and the support frames 565 to cooperate and provide support. During the lifting and lowering process, the connecting plate 562 can tilt due to the force of the airflow, causing the support frames 565 to move and thus adjusting the contact area between the connecting plate 562 and the support frames 565. The top of the connecting plate 562 is slidably connected to the air supply duct 52.

[0059] The top of the connecting plate 562 extends to the outside of the blocking sleeve 56, and the bottom of the support frame 565 is slidably connected to the side connecting block 563.

[0060] The auxiliary component 4 includes a bracket 43, which is fixedly connected to the top of the control box 2. The bracket 43, in conjunction with the blocking ring 42, secures the purification cylinder 41 on the control box 2, creating a placement space between the bracket 43 and the blocking ring 42. This facilitates the placement of the purification cylinder 41 by the blocking ring 42. The exposed space of the bracket 43 is observable from the outside, and the bracket 43 effectively secures the blocking ring 42, thereby reinforcing the blocking ring 42 and increasing its load-bearing capacity on the bracket 43. This prevents the blocking ring 42 from breaking under pressure, which could damage the purification cylinder 41. 1. If the device falls, a blocking ring 42 is fixedly connected to the top of the bracket 43. A purification cylinder 41 is slidably connected to the inner surface of the blocking ring 42. Activated carbon is placed inside the purification cylinder 41, which is placed on the blocking ring 42 to purify the air around the equipment. This prevents odors from being generated during the core rod welding process, which would affect the use of the equipment. When the purification cylinder 41 is shaken, it can move on the blocking ring 42, causing the activated carbon stored inside the purification cylinder 41 to move as well. This ensures that the activated carbon is fully in contact with the air inside the purification cylinder 41 for purification, and avoids the accumulation of activated carbon inside the purification cylinder 41, which would result in incomplete use of the activated carbon.

[0061] An auxiliary block 44 is fixedly connected to the inner surface of the bracket 43. The auxiliary block 44 connects the control box 2 and the bracket 43, increasing the contact area and thus enhancing the stability of the bracket 43's installation position. Three auxiliary rods 46 are provided on the auxiliary block 44 to support the placed purification cylinder 41, ensuring its vertical placement and preventing excessive sag after installation. The auxiliary rods 46 also restrict the installation position of the purification cylinder 41, reinforcing its edges. The auxiliary rods 46 and auxiliary block 44 work together to reinforce the cylinder. The top of the auxiliary block 44 is fixed. A buffer block 45 is connected, and the buffer block 45 has a spring. The buffer block 45 is shaken and raised and lowered under the action of the spring. The rise and fall of the buffer block 45 knocks on the purification cylinder 41, which facilitates the movement of the purification cylinder 41. As the purification cylinder 41 moves, it can drive the activated carbon to move, thus providing thrust for the movement of the purification cylinder 41. The rise and fall of the buffer block 45 is supported in conjunction with the auxiliary rod 46, so that the buffer block 45 can restrict the installation position of the purification cylinder 41. When the buffer block 45 rises and falls, it is restricted by the auxiliary rod 46, so that the rise and fall of the buffer block 45 is not prone to tilting and affecting the support of the buffer block 45. The auxiliary rod 46 is fixedly connected to the auxiliary block 44 near the bracket 43.

[0062] The bottom of the auxiliary block 44 is fixedly connected to the control box 2, and the top of the buffer block 45 is slidably connected to the purification cylinder 41.

[0063] The collection component 6 includes an abutment plate 61, which is fixedly connected to the bottom of the inner cavity of the base 1. The abutment plate 61, installed inside the base 1, effectively blocks the collection space, thus limiting its movement within the base 1. A connecting plate 64 on the abutment plate 61 supports the end of the connecting screw 8 of the base 1 near the control box 2. This fixes the abutment plate 61's position within the base 1, preventing it from shifting and affecting slag collection. The abutment plate 61 and connecting plate 64 work together to block slag, ensuring sufficient collection within the base 1. A connecting plate 64 is fixedly connected to the outer surface of the abutment plate 61, and an arc-shaped plate 62 is fixedly connected to the top of the abutment plate 61. The arc-shaped plate 62 is located between the abutment plate 61 and the collection shell 63, so that the arc-shaped plate 62 blocks the abutment plate 61, making it easier for some of the falling welding slag to enter the groove of the machine base 1, ensuring that the welding slag falling inside the machine base 1 is collected in an orderly manner, preventing the welding slag from scattering everywhere and affecting subsequent cleaning. The arc-shaped plate 62 and the connecting plate 64 cooperate with each other to protect the abutment plate 61, so that the installation position of the arc-shaped plate 62 on the abutment plate 61 can be reinforced, so that the arc-shaped plate 62 can support the collection shell 63 when it descends, and so that the arc-shaped plate 62 can limit the descent of the collection shell 63.

[0064] An extraction cylinder 65 is fixedly connected to the abutment plate 61 near the arc-shaped plate 62. The extraction cylinder 65 is used to extract fumes generated during welding. The extraction cylinder 65 generates suction on the abutment plate 61, which flows through the collection shell 63. This suction, combined with the collection shell 63, facilitates the collection of welding slag. By simultaneously extracting welding slag and collecting fumes, the extraction cylinder 65 prevents fumes from circulating and affecting air purification. The extraction cylinder 65 also supports the collection shell 63, ensuring its proper installation position. The air inlet of the extraction cylinder 65 works in conjunction with the collection shell 63 to collect welding slag. The position of the collection shell 63 connected to the extraction cylinder 65 is positioned relative to the arc-shaped plate 62. The gap allows the collecting shell 63 to remain horizontal for slag collection. A limiting frame 66 is fixedly connected to the outer surface of the extraction cylinder 65, and the bottom of the limiting frame 66 is fixedly connected to the abutment plate 61. The collecting shell 63 is fixedly connected to the extraction cylinder 65 away from the limiting frame 66. The collecting shell 63 collects slag above the abutment plate 61, so that the position of the collecting shell 63 corresponds to the position of the mandrel welding, which facilitates the movement space between the collecting shell 63 and the abutment plate 61, allowing the collecting shell 63 to collect the slag fully. The collecting shell 63 has a buffer pad inside, so that when the inside of the collecting shell 63 comes into contact with the slag, it is not easy for the slag to bounce back and scatter. As the slag falls to the outside of the collecting shell 63, the collecting shell 63 and the abutment plate 61 cooperate to collect the slag, reducing the difficulty of subsequent slag cleaning.

[0065] The bottom of the inner cavity of the limiting frame 66 is fixedly connected to a limiting sleeve 664. The limiting frame 66 reinforces the installation position of the extraction cylinder 65 on the abutment plate 61, facilitating the restriction of the extraction cylinder 65 by the installation position of the limiting frame 66, preventing displacement of the extraction cylinder 65 on the abutment plate 61 and affecting the collection of welding slag. The limiting frame 66 can also cooperate with the arc-shaped plate 62, thereby increasing the weight of the abutment plate 61 itself, facilitating the reinforcement of the abutment plate 61 by the limiting frame 66 and the movable plate 663 at different positions, ensuring the firmness of the installation position of the limiting frame 66. A reset plate 665 is fixedly connected to the top of the limiting sleeve 664. The reset plate 665 supports the mating plate 666 on the limiting sleeve 664, allowing the reset plate 665 to extend and retract under the pressure of the mating plate 666, facilitating the movement of the mating plate 666 by the extension and retraction of the reset plate 665. The retaining plates are arranged in a circular pattern on the limiting sleeve 664. The limiting sleeve 664 cooperates with the reset plate 665 to fix the installation position of the mating plate 666, keeping the limiting sleeve 664 vertically installed inside the limiting frame 66. This prevents the limiting sleeve 664 from shifting and affecting the position of the mating plate 666. The top of the reset plate 665 is fixedly connected to the mating plate 666. When the mating plate 666 is shaken, it moves along the limiting frame 66, causing the mating plate 666 to drive the reset plate 665 to move. This facilitates the mating plate 666 to press the reset plate 665. The extension of the reset plate 665 pushes the mating plate 666 to reset. This ensures that the mating plate 666 adjusts its support position when moving inside the limiting frame 66, thus reinforcing the inside of the limiting frame 66 and increasing the load-bearing capacity of the limiting frame 66. The outer surface of the mating plate 666 is slidably connected to the limiting frame 66.

[0066] A lifting plate 661 is slidably connected to the bottom of the inner cavity of the limiting frame 66. The lifting plate 661 moves within the limiting frame 66 under the pressure of the movable plate 663 via the fixed rod 662. The elasticity of the lifting plate 661 pushes the movable plate 663 to reset, facilitating the lifting and lowering movement of the movable plate 663. This prevents the lifting plate 661 from tilting during its lifting and lowering movement, thus ensuring the smooth sliding of the movable plate 663. Furthermore, the extension and retraction of the lifting plate 661 limits the lifting range of the movable plate 663, ensuring that the lifting plate 661 and the limiting sleeve 664 cooperate to maintain stability. The contact area during lifting and moving is such that a fixed rod 662 is fixedly connected to the top of the lifting plate 661, and a movable plate 663 is fixedly connected to the top of the fixed rod 662. The movable plate 663 is shaken inside the limiting frame 66 and moves with the mating plate 666, so that the movable plate 663 moves along the limiting frame 66 and presses the fixed rod 662. This facilitates the movement of the movable plate 663 and the mating plate 666 pressing against the limiting frame 66, ensuring the activity space inside the limiting frame 66 and preventing the movable plate 663 from getting stuck and affecting its use. The outer surface of the movable plate 663 is slidably connected to the limiting frame 66.

[0067] Example 2, please refer to Figures 1-12 Based on Example 1, the present invention provides a technical solution: a welding method for a welding device for repairing hot-rolled mandrels of seamless steel pipes. Step 1: After removing surface defects by turning the mandrel on a lathe, it is prepared for welding. Then, the mandrel to be welded is clamped in the clamping seat 3. The control box 2 controls the clamping of the clamping seat 3 on the machine base 1, so that the clamping seat 3 can rotate on the control box 2. After the mandrel is clamped, the screw 8 is driven by the drive motor to rotate clockwise, so that the clockwise rotation of the screw 8 drives the displacement seat 7 to move closer to the control box 2. Conversely, the counterclockwise rotation of the screw 8 drives the displacement seat 7 to move away from the control box 2.

[0068] Step 2: The installation cylinder 54 is moved to a position close to the mandrel by the displacement seat 7 and then stopped. The three welding devices 9 on the installation cylinder 54 use low alloy welding wire, medium-low alloy welding wire, and high alloy welding wire respectively. The installation cylinder 54 is rotated clockwise by the rotary motor on the displacement seat 7. The rotation of the installation cylinder 54 causes the low alloy welding wire, medium-low alloy welding wire and high alloy welding wire installed on the three welding devices 9 in sequence to build up the mandrel. During the mandrel building up process, the clamping seat 3 rotates with the mandrel building up, thereby adjusting the building up position of the mandrel. After the mandrel has been built up three times, the mandrel is removed from the clamping seat 3.

[0069] Step 3: Fix the air supply duct 52 on the mounting cylinder 54 using the fixing block 51 and the side support plate 53, so that the air supply duct 52 can deliver air after the welding of the welder 9 is completed. The air delivered by the air supply duct 52 flows through the air guide pipe 55 inside the mounting cylinder 54. As the air is discharged through the groove on the surface of the mounting cylinder 54, it can blow towards the welding position of the mandrel, blowing off the welding slag remaining at the welding position of the mandrel. The blocking sleeve 56 supports the central solid plate 561 inside the mounting cylinder 54. When the air flows inside the mounting cylinder 54, the air pushes the connecting plate 562 to move inside the blocking sleeve 56, so that the connecting plate 562 drives the support frame 565 to move and squeeze the pressing plate 564. The pressing plate 564 extends and retracts on the central solid plate 561, so that the connecting plate 562 moves up and down. When the support frame 565 rises and falls to contact the side connecting block 563, it moves along the side connecting block 563.

[0070] Step 4: The installation position of the purification cylinder 41 is restricted by the cooperation of the bracket 43 and the blocking ring 42, so that the activated carbon placed inside the purification cylinder 41 can purify the air. The auxiliary block 44 is connected to the bracket 43, so that the auxiliary rods 46 distributed in a circle on the auxiliary block 44 support the purification cylinder 41. At the same time, the buffer block 45 has a spring, so that the buffer block 45 and the auxiliary rods 46 contact the purification cylinder 41 together. When the buffer block 45 shakes, the spring extends and retracts, causing the buffer block 45 to rise and fall, so that the buffer block 45 strikes the purification cylinder 41.

[0071] Step 5: The welding slag generated by the mandrel on the clamping seat 3 gradually falls off. The base 1 has a groove below the mandrel welding position. The groove catches the falling welding slag, so that the extraction cylinder 65 generates suction on the abutment plate 61. The suction generated by the extraction cylinder 65 sucks up the falling welding slag. At the same time, the extraction cylinder 65 also sucks up the smoke generated during the welding process, so that the welding slag falls onto the collection shell 63 while being sucked up. The collection shell 63 is located inside the base 1 below the clamping position of the mandrel on the clamping seat 3. The collection shell 63 collects the welding slag inside the groove of the base 1. The connecting plate 64 supports the position of the connecting screw 8 of the base 1 on the abutment plate 61.

[0072] Step Six: The limiting frame 66 contacts the extraction cylinder 65 on the abutment plate 61, fixing the extraction cylinder 65 with the limiting frame 66. As the limiting sleeve 664 supports the mating plate 666 via the reset plate 665, the mating plate 666 is shaken, causing the reset plate 665 to extend and retract. The mating plate 666 moves along the limiting frame 66, while the movable plate 663 is shaken, pressing the fixed rod 662. This causes the fixed rod 662 to press the lifting plate 661 and move it along the limiting frame 66.

[0073] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A welding device for repairing hot-rolled mandrels of seamless steel pipes, comprising a base (1), a control box (2) fixedly connected to the top of the base (1), and a clamping seat (3) rotatably connected to the outer surface of the control box (2), characterized in that, Also includes: Auxiliary component (4), which is fixedly connected to the top of the control box (2), is used to purify the air during the welding process; A screw (8) is rotatably connected to the top of the base (1). The screw (8) is used to adjust the position of the weld overlay. A displacement seat (7) is rotatably connected to the outer surface of the screw (8). An installation assembly (5) is rotatably connected to the top of the displacement seat (7). A welder (9) is fixedly connected to the outer surface of the installation assembly (5). Collection component (6) is fixedly connected to the bottom of the inner cavity of the base (1). The collection component (6) is used to collect the welding slag that falls off when the welder (9) is welding. The mounting assembly (5) includes a mounting cylinder (54) which is rotatably connected to the top of the displacement seat (7). The mounting cylinder (54) is used to adjust the position of the welder (9). A fixing block (51) is fixedly connected to the top of the mounting cylinder (54), and a barrier sleeve (56) is fixedly connected to the bottom of the inner cavity of the mounting cylinder (54). An air supply duct (52) is fixedly connected to the top of the inner cavity of the mounting cylinder (54). The air supply duct (52) is used to blow the mandrel after the welding is completed. A side support plate (53) is fixedly connected to the outer surface of the air supply duct (52). A duct (55) is connected to the air supply duct (52) away from the side support plate (53). The inner surface of the barrier sleeve (56) is fixedly connected to a central solid plate (561), and the top of the central solid plate (561) is fixedly connected to a side connecting block (563). Press plate (564), which is fixedly connected to the central plate (561) near the side connecting block (563), the top of the press plate (564) is fixedly connected to a support frame (565), the top of the support frame (565) is fixedly connected to a connecting plate (562), and the top of the connecting plate (562) is slidably connected to the air supply tube (52); The top of the connecting plate (562) extends to the outside of the barrier sleeve (56), and the bottom of the support frame (565) is slidably connected to the side block (563).

2. The welding device for repairing hot-rolled mandrels of seamless steel pipes according to claim 1, characterized in that: The side support plate (53) is fixedly connected to the mounting cylinder (54) at a position away from the air supply duct (52), and the bottom end of the fixing block (51) is fixedly connected to the air supply duct (52).

3. The welding device for repairing hot-rolled mandrels of seamless steel pipes according to claim 2, characterized in that: The bottom of the displacement seat (7) is slidably connected to the base (1), and the outer surface of the welder (9) penetrates the mounting cylinder (54).

4. The welding device for repairing hot-rolled mandrels of seamless steel pipes according to claim 3, characterized in that: The clamping seat (3) extends through the control box (2) and into the control box (2) on the side away from the mounting cylinder (54), and the bottom of the auxiliary component (4) extends through the control box (2) and into the control box (2).

5. The welding device for repairing hot-rolled mandrels of seamless steel pipes according to claim 4, characterized in that: The auxiliary component (4) includes a bracket (43) which is fixedly connected to the top of the control box (2). A blocking ring (42) is fixedly connected to the top of the bracket (43), and a purification cylinder (41) is slidably connected to the inner surface of the blocking ring (42). An auxiliary block (44) is fixedly connected to the inner surface of the bracket (43). A buffer block (45) is fixedly connected to the top of the auxiliary block (44). An auxiliary rod (46) is fixedly connected to the auxiliary block (44) near the bracket (43).

6. The welding device for repairing hot-rolled mandrels of seamless steel pipes according to claim 5, characterized in that: The bottom of the auxiliary block (44) is fixedly connected to the control box (2), and the top of the buffer block (45) is slidably connected to the purification cylinder (41).

7. The welding device for repairing hot-rolled mandrels of seamless steel pipes according to claim 6, characterized in that: The collecting component (6) includes an abutment plate (61), which is fixedly connected to the bottom of the inner cavity of the base (1). A connecting plate (64) is fixedly connected to the outer surface of the abutment plate (61), and an arc plate (62) is fixedly connected to the top of the abutment plate (61). An extraction cylinder (65) is fixedly connected to the abutment plate (61) near the arc plate (62). The extraction cylinder (65) is used to extract the fumes generated during welding. A limiting frame (66) is fixedly connected to the outer surface of the extraction cylinder (65). The bottom of the limiting frame (66) is fixedly connected to the abutment plate (61). A collection shell (63) is fixedly connected to the extraction cylinder (65) away from the limiting frame (66). A limiting sleeve (664) is fixedly connected to the bottom of the inner cavity of the limiting frame (66), a reset plate (665) is fixedly connected to the top of the limiting sleeve (664), a mating plate (666) is fixedly connected to the top of the reset plate (665), and the outer surface of the mating plate (666) is slidably connected to the limiting frame (66). A lifting plate (661) is slidably connected to the bottom of the inner cavity of the limiting frame (66). A fixed rod (662) is fixedly connected to the top of the lifting plate (661). A movable plate (663) is fixedly connected to the top of the fixed rod (662). The outer surface of the movable plate (663) is slidably connected to the limiting frame (66).

8. A welding method using the welding apparatus for repairing seamless steel pipes with hot-rolled mandrels as described in claim 7, characterized in that: Step 1: After removing surface defects by turning the mandrel on a lathe, prepare it for welding. Then, clamp the mandrel to be welded in the clamping seat (3). The control box (2) controls the clamping of the clamping seat (3) on the machine base (1) so that the clamping seat (3) can rotate on the control box (2). After the mandrel is clamped, the screw (8) is driven by the drive motor to rotate clockwise. The clockwise rotation of the screw (8) drives the displacement seat (7) to move closer to the control box (2). Conversely, the counterclockwise rotation of the screw (8) drives the displacement seat (7) to move away from the control box (2). Step 2: Move the installation cylinder (54) to a position close to the mandrel by the displacement seat (7) and stop. The three welding devices (9) set on the installation cylinder (54) are respectively equipped with low alloy welding wire, medium-low alloy welding wire and high alloy welding wire. The installation cylinder (54) is driven by the rotary motor on the displacement seat (7) to rotate clockwise. The rotation of the installation cylinder (54) drives the low alloy welding wire, medium-low alloy welding wire and high alloy welding wire installed by the three welding devices (9) to build up the mandrel. During the mandrel building up process, the clamping seat (3) rotates with the mandrel building up, thereby adjusting the building up position of the mandrel. After the mandrel is built up three times, the mandrel is removed from the clamping seat (3). Step 3: Fix the air supply duct (52) on the mounting cylinder (54) using the fixing block (51) and the side support plate (53), so that the air supply duct (52) can deliver air after the welding is completed by the welder (9). The air delivered by the air supply duct (52) flows through the air guide pipe (55) inside the mounting cylinder (54). As the air is discharged through the grooves on the surface of the mounting cylinder (54), it can blow towards the welding position of the mandrel, blowing off the welding slag remaining at the welding position of the mandrel, and blocking the sleeve (56) in the mounting cylinder ( 54) When the airflow is inside the internal support plate (561) and the mounting cylinder (54), the airflow pushes the connecting plate (562) to move inside the barrier sleeve (56), causing the connecting plate (562) to drive the support frame (565) to move and press the pressing plate (564). The pressing plate (564) extends and retracts on the internal support plate (561), causing the connecting plate (562) to move up and down. When the support frame (565) rises and falls to the contact side block (563), it moves along the side block (563). Step 4: The installation position of the purification cylinder (41) is restricted by the bracket (43) and the blocking ring (42), so that the activated carbon placed inside the purification cylinder (41) can purify the air. The auxiliary block (44) is connected to the bracket (43), so that the auxiliary rods (46) distributed in a circle on the auxiliary block (44) support the purification cylinder (41). At the same time, the buffer block (45) has a spring, so that the buffer block (45) and the auxiliary rods (46) contact the purification cylinder (41) together. When the buffer block (45) shakes, the spring extends and retracts, causing the buffer block (45) to rise and fall, so that the buffer block (45) knocks on the purification cylinder (41). Step 5: The welding slag generated by the mandrel on the clamping seat (3) gradually falls off. The machine base (1) is located below the mandrel welding position and has a groove. The groove catches the falling welding slag, so that the extraction cylinder (65) generates suction on the abutment plate (61). The suction generated by the extraction cylinder (65) sucks up the falling welding slag. At the same time, the extraction cylinder (65) also sucks up the smoke generated during the welding process, so that the welding slag falls onto the collection shell (63) while being sucked up. The collection shell (63) is located inside the machine base (1) below the clamping seat (3) where the mandrel is held. The collection shell (63) collects the welding slag inside the groove of the machine base (1). The connecting plate (64) supports the position of the connecting screw (8) of the machine base (1) on the abutment plate (61). Step 6: Use the limiting frame (66) to contact the extraction cylinder (65) on the abutment plate (61), so that the limiting frame (66) fixes the extraction cylinder (65), and as the limiting sleeve (664) supports the mating plate (666) through the reset plate (665), when the mating plate (666) is shaken, it drives the reset plate (665) to extend and retract, and the mating plate (666) moves along the limiting frame (66). At the same time, the movable plate (663) is shaken and squeezes the fixed rod (662), so that the fixed rod (662) squeezes the lifting plate (661) to move along the limiting frame (66).

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