A welding device for butt joints of steel pipes

Abstract

The present application relates to the technical fields of steel pipe processing, and discloses a welding device for butt joint of steel pipes, which comprises a device body, a placing roller, a welding component, a pneumatic component, a power component, a pre-fixing component, a limiting component, an unlocking component and other parts. The welding device for butt joint of steel pipes automatically pre-fixes the steel pipes, thereby reducing the labor cost and labor intensity. After the steel pipe is placed on the placing roller, the gravity of the steel pipe will press the transmission plate of the unlocking component to move downward. The outer unlocking frame drives the downward pressing wheel to extrude the guide block of the limiting component, so that the stop block is retracted to release the restriction on the lifting disc. The first spring of the power component releases the elastic force, pushes the lifting block and the lifting disc to move downward, drives the limiting wheel of the pre-fixing component to tightly contact with the steel pipe, automatically completes the pre-fixing of the steel pipe, effectively prevents the long steel pipe from being raised, does not need manual continuous support and pressing on the steel pipe, reduces the number of operators and labor intensity, and improves the automation level of the device.

Description

Technical Field

[0001] This invention relates to the technical field of steel pipe processing, specifically to a welding device for butt joints of steel pipes. Background Technology

[0002] In fields such as construction, pipeline engineering, and steel structure manufacturing, butt welding of steel pipes is a key process for constructing long-distance pipelines and building load-bearing structures. The welding quality directly affects the safety and durability of the project. With the continuous improvement of efficiency and precision requirements in industrial production, automated steel pipe welding equipment has gradually become the industry mainstream, aiming to reduce manual intervention and improve welding consistency. However, in actual production, steel pipes vary in length, and the positioning and stability of longer steel pipes on the welding equipment has become a prominent factor restricting the efficiency and quality of automated welding.

[0003] Existing steel pipe butt welding devices have the function of automatically rotating the steel pipe, mainly relying on the rotation of the placement roller to achieve the rotation of the steel pipe. In use, the steel pipe to be welded is first placed on the placement roller of the device. The rotation of the placement roller drives the steel pipe to rotate synchronously to cooperate with the welding operation. After the steel pipe is in place, a pneumatic component presses the steel pipe down, thereby initially fixing the steel pipe and providing basic support for subsequent welding. This type of device has achieved automation of steel pipe welding to a certain extent, improved the convenience of operation in the welding process, and can be applied to butt welding operations of steel pipes of various specifications, providing technical support for production in related fields.

[0004] However, in practical applications, this type of steel pipe butt welding device has significant defects. Because many steel pipes are longer than the placement rollers, the portion of the pipe exceeding the roller's range is prone to warping after placement. At this point, since another set of steel pipes has not yet been placed on the other set of rollers, to ensure the accuracy of the welding position after subsequent pipe butt welding, at least one worker needs to press and limit the end of the pipe, while another worker adjusts its position. Even after the position of this set of pipes is adjusted, workers still need to continuously restrict its position. The same operation is required when placing the second pipe. Only after the ends of the two pipes are butt-jointed will the pneumatic components be activated to press down and restrict the ends of both sets of pipes. The manual support of the warped pipes during the entire operation not only increases the labor intensity of the operators but also increases the number of workers required, resulting in relatively high labor costs. Furthermore, it reduces the automation level of the welding device. Therefore, improvements to the existing steel pipe butt welding device are urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide a welding device for steel pipe butt joints to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding device for steel pipe butt joints, comprising a device body, a placement roller and a welding component, wherein a power component is installed on the device body, which includes two sets of inverted L-shaped support frames installed on the device body, and a lifting block is slidably installed on the inverted L-shaped support frame, a lifting plate is installed at the bottom of the lifting block, and a first spring connected to the inverted L-shaped support frame is installed on the lifting plate.

[0007] A pre-fixing component for pressing down the steel pipe is installed between the two sets of inverted L-shaped support frames, which includes:

[0008] A transmission seat is located between two sets of inverted L-shaped support frames, and connectors are provided on the transmission seat and the lifting block for connecting the lifting block and the transmission seat;

[0009] The limit wheel has two sets installed on the outer wall of the transmission seat, and the limit wheel is equipped with balls;

[0010] The device body is equipped with a limiting component. When in operation, the limiting component supports the bottom of the lifting plate to ensure that the lifting plate cannot move downward. The device body is also equipped with an unlocking component located below the steel pipe on the placement roller. When the steel pipe is placed on the placement roller, the steel pipe will drive the unlocking component. When the unlocking component is running, it will release the limitation of the limiting component on the lifting plate.

[0011] Preferably, the connector includes:

[0012] A connecting seat is installed at the end of the transmission seat, and a sliding block is installed at the end of the connecting seat. The outer wall of the lifting block is provided with a sliding groove corresponding to the sliding block.

[0013] Bolts are slidably connected to the lifting block, and the lifting block has through holes corresponding to the bolts;

[0014] The threaded hole is formed on the outer wall of the connecting seat and the sliding block, and the threaded hole is connected to the bolt thread.

[0015] Preferably, the sliding block has a rectangular cross-section, and the width of the sliding block is smaller than the diameter of the connecting seat;

[0016] The outer wall of the lifting block away from the connector has a storage groove corresponding to the end of the bolt. The bolt has a T-shaped cross-section, and the thickness of the outer end of the bolt is less than the depth of the storage groove.

[0017] The through hole penetrates the lifting block, and multiple sets of through holes are equally spaced on the lifting block, with each set of through holes communicating with the storage groove and the sliding groove.

[0018] Preferably, the limiting component includes:

[0019] The mounting base is installed on the device body, and a mounting box is installed on the top outer wall of the mounting base. A stop block that is in contact with the bottom of the lifting plate is slidably installed inside the mounting box.

[0020] The second spring is installed inside the top of the mounting base and is connected to the inner end of the stop block;

[0021] A guide block, which is mounted on the side wall of the stop, is used to cooperate with the unlocking component.

[0022] Preferably, the unlocking component includes:

[0023] A storage box is installed on the top of the device body and is located between the placement rollers. A transmission plate that contacts the outer wall of the steel pipe is slidably installed inside the storage box.

[0024] The third spring is installed inside the storage box, and the top of the third spring is fixedly connected to the transmission plate.

[0025] The outward unlocking bracket is fixedly installed on the outer wall of the transmission plate and is slidably connected to the storage box. A pressing wheel for pressing down the guide block is rotatably installed on the outer end of the outward unlocking bracket.

[0026] Preferably, the guide block has an inclined surface design on both the upper and lower surfaces, and the guide block will contact the lower pressure wheel during the lifting and moving process;

[0027] The distance between the outer walls on both sides of the guide block is greater than the length of the position where the stop block and the lifting plate are in contact.

[0028] Preferably, the thickness of the outer end of the stop is less than the thickness of its end inside the mounting box, and the top corner of the outer end of the stop is designed with an arc-shaped rounded corner, and the surface of the stop that is in contact with the bottom of the lifting plate is a plane;

[0029] A baffle is fixedly installed on the top of the lifting plate near the stop block, and the length of the baffle is greater than the length of the lifting plate moving downward, and the installation position of the baffle is offset from the first spring;

[0030] Multiple sets of buffer wheels are installed at equal intervals on the outer wall of the baffle. During the process of the lifting plate driving the baffle to move downward, the outer wall of the baffle will come into contact with the buffer wheels.

[0031] Preferably, the installation position of the transmission plate is offset from that of the placement roller, and the top surface of the transmission plate and the apex of the placement roller are located on the same plane;

[0032] The third spring is provided in multiple sets at equal intervals at the bottom of the transmission plate. The outward unlocking frame and the downward pressure wheel are symmetrically arranged on both sides of the transmission plate, and the positions of the outward unlocking frame and the downward pressure wheel are staggered from the placement roller.

[0033] Preferably, the outer wall of the mounting box near the unlocking component has an unlocking groove corresponding to the pressure wheel and the outward unlocking bracket, and the guide block is located in the unlocking groove.

[0034] Preferably, the positions of the components in the power component, pre-fixing component, limiting component, and unlocking component are all staggered from the installation position of the placement roller.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. This welding device for steel pipe butt joints reduces labor costs and intensity by automatically pre-fixing the steel pipe. After the steel pipe is placed on the placement roller, its gravity will press the transmission plate of the unlocking component to move downward. The outward unlocking frame drives the downward pressure roller to squeeze the guide block of the limiting component, causing the stop block to retract and release the restriction on the lifting plate. This causes the first spring of the power component to release its elastic force, pushing the lifting block and the lifting plate downward, causing the limiting wheel of the pre-fixing component to fit tightly with the steel pipe, automatically completing the pre-fixing of the steel pipe. This effectively prevents long steel pipes from tilting up, eliminating the need for continuous manual support and pressing of the steel pipe, reducing the number of operators and labor intensity, and improving the automation level of the device.

[0037] 2. This welding device for steel pipe butt joints features strong pre-fixation adaptability, ensuring welding positioning accuracy. The pre-fixation component is connected to the power component via a connector. The sliding block slides along the groove to adjust the height of the transmission seat. Combined with multiple sets of through holes and bolts, it can adapt to steel pipes of different diameters. The ball bearings on the limit wheel reduce friction when the steel pipe rotates, ensuring both pre-fixation stability and not affecting the rotation of the steel pipe during welding. This dual function ensures that the steel pipe butt joint is always in a precise position, avoiding welding defects caused by steel pipe misalignment during welding and improving the consistency of welding quality.

[0038] 3. This welding device for steel pipe butt joints features a limiting component. The outer arc-shaped rounded corner of the limiting component's stop block fits snugly against the bottom surface of the lifting plate, reducing contact wear. The baffle of the lifting plate cooperates with the buffer wheel of the stop block to buffer the impact force when the lifting plate moves downward. The inclined design of the pressing wheel and guide block of the unlocking component ensures smooth unlocking without jamming. The structural adaptation and buffer design of each component reduce mechanical wear during equipment operation, extend the overall service life, and meet the needs of high-frequency welding operations.

[0039] 4. This welding device for steel pipe butt joints initially features a limiting component that stably supports the power component. After the steel pipe is placed, it automatically triggers unlocking and pre-fixation. After two sets of steel pipes are joined, the pneumatic component is activated to strengthen the fixation. The placement roller drives the steel pipe to rotate, cooperating with the welding component to complete the full circumference welding. After welding is completed and the steel pipe is removed, each component automatically resets under the action of springs, and the stop block re-supports the lifting plate to await the next operation. The entire process does not require cumbersome manual adjustment, realizing a continuous operation of "placement-pre-fixation-welding-reset", which greatly shortens the welding preparation and finishing time. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 This is a schematic diagram of the structure of the power component and the pre-fixed component of the present invention;

[0042] Figure 3 This is a schematic diagram of the structure of the power component, pre-fixed component, limiting component, and unlocking component when the present invention is not in use;

[0043] Figure 4 For the present invention Figure 3 A structural diagram from another perspective;

[0044] Figure 5 This is a schematic diagram of the disassembled limiting component and unlocking component of the present invention;

[0045] Figure 6 This is a schematic diagram of the structure of some components of the power component, pre-fixing component, limiting component, and unlocking component of the present invention;

[0046] Figure 7 For the present invention Figure 6 A structural schematic diagram of the components from another perspective;

[0047] Figure 8 For the present invention Figure 7 A schematic diagram of the structure of the disassembled components;

[0048] Figure 9 This is a schematic diagram of the structure after the steel pipe is installed on the placement roller in this invention.

[0049] In the picture:

[0050] 1. Device body;

[0051] 2. Place the rollers;

[0052] 3. Welded components;

[0053] 4. Power components; 40. Inverted L-shaped support frame; 41. Lifting block; 42. Lifting plate; 43. First spring; 44. Baffle;

[0054] 5. Pre-fixed component; 50. Transmission seat; 51. Connector; 511. Connecting seat; 512. Sliding block; 5120. Slide groove; 513. Bolt; 514. Through hole; 515. Threaded hole; 516. Storage groove; 52. Limiting wheel; 53. Ball bearing;

[0055] 6. Limiting component; 60. Mounting base; 61. Mounting box; 62. Stop block; 620. Buffer wheel; 63. Second spring; 64. Guide block; 65. Unlocking slot;

[0056] 7. Unlocking component; 70. Storage box; 71. Transmission plate; 72. Third spring; 73. Outward unlocking bracket; 74. Downward pressure wheel. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] Please see Figures 1 to 9 The present invention provides a technical solution: a welding device for steel pipe butt joints, including a device body 1, a placement roller 2, a welding component 3, a pneumatic component, a power component 4, a pre-fixing component 5, a limiting component 6, and an unlocking component 7, etc.

[0059] The device body 1 is the core support carrier of the welding device, used to integrate and install various functional components, providing a stable working platform for butt welding of steel pipes; the placement roller 2 is installed on the device body 1, used to carry the steel pipe to be welded, and can drive the steel pipe to rotate synchronously through rotation, cooperating with the welding component 3 to complete the full circumferential welding; the welding component 3 is the core of the welding execution, used to perform welding operations on the butt joint of the two sets of steel pipes, ensuring welding quality; the power component 4 provides lifting power to the pre-fixing component 5, which is used to pre-press and fix the steel pipe placed on the placement roller 2 to prevent the steel pipe from tilting or shifting; the limiting component 6 is used to limit the initial position of the power component 4, and the unlocking component 7 is used to release the limitation of the limiting component 6 after the steel pipe is placed, realizing the automatic pressing down of the pre-fixing component 5.

[0060] For example, the power component 4 specifically includes two sets of inverted L-shaped support frames 40, a lifting block 41, a lifting plate 42, and a first spring 43;

[0061] Two sets of inverted L-shaped support frames 40 are symmetrically installed on the device body 1 to provide sliding support for the lifting block 41; the lifting block 41 is slidably installed on the inverted L-shaped support frame 40 and can be vertically lifted and lowered along the inverted L-shaped support frame 40.

[0062] Secondly, the lifting plate 42 is fixedly installed at the bottom of the lifting block 41 to connect the pre-fixed component 5 and transmit pressure; the first spring 43 is installed between the lifting plate 42 and the inverted L-shaped support frame 40, and is in a compressed energy storage state in the initial state to provide downward power for the lifting plate 42 and the lifting block 41.

[0063] A baffle 44 is fixedly installed on the top of the lifting plate 42 near the limiting component 6. The length of the baffle 44 is greater than the length of the lifting plate 42 when it moves down, and its installation position is offset from the first spring 43. It is used to cooperate with the buffer wheel 620 to reduce collision damage when the lifting plate 42 moves down.

[0064] In this embodiment, the pre-fixing component 5 is located between two sets of inverted L-shaped support frames 40 and is used to press down the steel pipe to achieve pre-fixation. Specifically, it includes a transmission seat 50, a connector 51, a limiting wheel 52, and a ball 53.

[0065] The transmission seat 50 spans between two sets of lifting blocks 41 and is connected to the lifting blocks 41 via connector 51. Two sets of limit wheels 52 are symmetrically installed on the outer wall of the transmission seat 50. The balls 53 are rotatably installed on the limit wheels 52. The cooperation between the limit wheels 52 and the balls 53 can reduce the friction when the steel pipe rotates and at the same time apply downward pressure to the steel pipe.

[0066] Specifically, the connector 51 in this embodiment includes a connector 511, a sliding block 512, a bolt 513, a through hole 514, a threaded hole 515, and a storage groove 516.

[0067] The connecting seat 511 is fixedly installed at the end of the transmission seat 50, and the sliding block 512 is installed at the end of the connecting seat 511. The cross-section is designed as a rectangular block, and the width is smaller than the diameter of the connecting seat 511.

[0068] Secondly, the outer wall of the lifting block 41 is provided with a sliding groove 5120 corresponding to the sliding block 512. The sliding block 512 can slide along the sliding groove 5120 to realize the height adjustment of the transmission seat 50. The bolt 513 is slidably connected to the lifting block 41 and has a T-shaped cross-section. The lifting block 41 is provided with multiple sets of equally spaced through holes 514. The through holes 514 penetrate the lifting block 41 and communicate with the sliding groove 5120 and the storage groove 516.

[0069] The outer walls of the connecting seat 511 and the sliding block 512 are provided with threaded holes 515 corresponding to the bolt 513. After the bolt 513 passes through the through hole 514, it is threadedly connected to the threaded hole 515 to fix the transmission seat 50. The receiving groove 516 is opened on the outer wall of the lifting block 41 away from the connector 51, and its depth is greater than the thickness of the outer end of the bolt 513. It is used to receive the outer end of the bolt 513 and avoid interfering with the movement of the lifting block 41.

[0070] For example, the limiting component 6 is installed on the device body 1 to support the bottom of the lifting plate 42 and restrict its downward movement. Specifically, it includes a mounting base 60, a mounting box 61, a stop block 62, a second spring 63, a guide block 64, and an unlocking groove 65.

[0071] The mounting base 60 is fixedly mounted on the device body 1, while the mounting box 61 is mounted on the top outer wall of the mounting base 60; at the same time, the stop block 62 is slidably mounted in the mounting box 61. The top corner of the outer end of the stop block 62 is designed with an arc-shaped rounded corner, and the surface that is in contact with the bottom of the lifting plate 42 is a plane. The thickness of the outer end of the stop block 62 is less than the thickness of the inner end of the mounting box 61.

[0072] Secondly, the second spring 63 is installed inside the top of the mounting base 60, with one end connected to the inner end of the stop block 62, providing outward elastic force to the stop block 62; the guide block 64 is installed on the side wall of the stop block 62, with both the upper and lower surfaces being inclined, and is located in the unlocking slot 65 opened in the mounting box 61. The distance between the outer walls on both sides of the guide block 64 is greater than the length of the position where the stop block 62 and the lifting plate 42 are in contact.

[0073] Meanwhile, multiple sets of buffer wheels 620 are installed at equal intervals on the outer wall of the stop 62 to buffer wear during lifting and lowering when in contact with the baffle 44; and the unlocking groove 65 penetrates the outer wall of the mounting box 61 near the unlocking component 7, allowing the outward unlocking frame 73 and the downward pressure wheel 74 to pass through.

[0074] In this embodiment, the unlocking component 7 is installed on the device body 1 and located below the steel pipe between the placement rollers 2. Specifically, it includes a storage box 70, a transmission plate 71, a third spring 72, an outward unlocking frame 73, and a downward pressure wheel 74.

[0075] The storage box 70 is fixedly installed on the top of the device body 1, and the transmission plate 71 is slidably installed in the storage box 70. The top surface of the transmission plate 71 is on the same plane as the vertex of the placement roller 2, and the installation position of the transmission plate 71 is offset from that of the placement roller 2.

[0076] Secondly, multiple sets of third springs 72 are provided at equal intervals at the bottom of the transmission plate 71, and the top end is fixedly connected to the transmission plate 71 to provide the reset power for the transmission plate 71.

[0077] The outward unlocking bracket 73 is fixedly installed on both sides of the outer wall of the transmission plate 71 and is slidably connected to the storage box 70. The position of the outward unlocking bracket 73 is offset from that of the placement roller 2. The downward pressing wheel 74 is rotatably installed on the outer end of the outward unlocking bracket 73. It can move down with the transmission plate 71 and press down on the upper inclined surface of the guide block 64, driving the stop block 62 to retract.

[0078] It should be noted that in this embodiment, the positions of all components in the power component 4, pre-fixing component 5, limiting component 6, and unlocking component 7 are offset from the installation position of the placement roller 2 to avoid mutual interference.

[0079] Through the coordinated operation of the above components, the pre-fixed component 5 is first adjusted and fixed according to the diameter of the steel pipe. The steel pipe is placed on the placement roller 2, and the steel pipe presses the transmission plate 71 to move downward. The outward unlocking frame 73 drives the downward pressure roller 74 to squeeze the guide block 64, causing the stop block 62 to retract and release the restriction on the lifting plate 42. The lifting plate 42 moves downward under the action of the first spring 43, driving the limit wheel 52 to fit with the steel pipe to achieve pre-fixation. The operation is repeated to fix another set of steel pipes and align the butt joint. After the pneumatic component is started to further fix it, the welding component 3 cooperates with the placement roller 2 to rotate and complete the welding. After welding, the steel pipe is removed, and each component is reset under the action of the spring. The stop block 62 supports the lifting plate 42 again, and the device returns to the standby state. The entire device realizes automatic pre-fixation of the steel pipe, reduces manual intervention, and improves welding efficiency and accuracy.

[0080] The working principle of a welding device for steel pipe butt joints is as follows:

[0081] When the device body 1 is in the initial standby state, the first spring 43 of the power component 4 is in the compressed energy storage state, and the lifting block 41 is in a high position along the inverted L-shaped support frame 40, while the bottom surface of the lifting plate 42 is in contact with the top plane of the stop block 62 in the limiting component 6.

[0082] Furthermore, under the elastic force of the second spring 63, the stop block 62 in the limiting component 6 is in the state of extending out of the mounting box 61, while the guide block 64 is located in the unlocking groove 65 of the mounting box 61, and the multiple sets of buffer wheels 620 on the outer wall of the stop block 62 are in the standby state.

[0083] In subsequent use, the pre-fixed component 5 needs to be adjusted in advance according to the diameter of the steel pipe on the power component 4. Specifically, the connecting seat 511 at the end of the transmission seat 50 is adjusted between the lifting blocks 41. At this time, the sliding block 512 at the end of the connecting seat 511 slides in the sliding groove 5120 on the outer wall of the lifting block 41. Since the cross-section of the sliding block 512 is a rectangular block and its width is smaller than the diameter of the connecting seat 511, the corresponding through hole 514 on the lifting block 41 can be selected according to the specifications of the steel pipe to be welded.

[0084] Subsequently, a T-shaped bolt 513 is passed through the through hole 514 and threaded into the threaded hole 515 on the outer wall of the connecting seat 511 and the sliding block 512. The outer end of the bolt 513 is embedded in the receiving groove 516. Because the thickness of the outer end of the bolt 513 is less than the depth of the receiving groove 516, the bolt 513 will not be directly exposed in the receiving groove 516, thereby avoiding interference with the lifting movement of the lifting block 41 caused by the setting of the bolt 513. After the installation of the pre-fixed component 5 is completed, the two sets of limit wheels 52 on the outer wall of the transmission seat 50 and the balls 53 on the wheels are in a high position and ready to go.

[0085] Because the top surface of the transmission plate 71 in the unlocking component 7 is on the same plane as or higher than the plane where the top of the placement roller 2 is located, the multiple sets of third springs 72 at the bottom of the transmission plate 71 naturally extend, and the outward unlocking brackets 73 on both sides and the pressure rollers 74 at the outer end are in a high position and do not contact the guide block 64 of the limiting component 6.

[0086] When welding is required, the first set of steel pipes to be welded is placed on the placement roller 2 of the device body 1. The outer wall of the steel pipe contacts the transmission plate 71 of the unlocking component 7. The weight of the steel pipe forces the transmission plate 71 to compress the third spring 72 downward. The transmission plate 71 drives the outward unlocking frame 73 arranged symmetrically on both sides to move down synchronously.

[0087] During this process, the downward pressure wheel 74 at the outer end of the outward unlocking bracket 73 passes through the unlocking groove 65 of the mounting box 61, contacts the upper inclined surface of the guide block 64, and continuously presses down on the inclined surface of the guide block 64; when the guide block 64 is subjected to force, it drives the stop block 62 to slide into the mounting box 61. During this process, the stop block 62 will compress the second spring 63, which will cause the outer end of the stop block 62 to separate from the bottom of the lifting plate 42, thus releasing the restriction on the lifting plate 42.

[0088] After the stop block 62 is released from its limit, the lifting plate 42, under the elastic force of the first spring 43, drives the lifting block 41 to slide downward along the inverted L-shaped support frame 40, while the transmission seat 50 moves downward synchronously with the lifting block 41; until the ball 53 on the limit wheel 52 on the outer wall of the transmission seat 50 is in close contact with the top surface of the steel pipe, the first spring 43 maintains a certain amount of compression, and applies continuous pressure to the steel pipe through the limit wheel 52 to achieve the pre-fixation of the first group of steel pipes, while the ball 53 can reduce the friction when the steel pipe rotates subsequently; during the downward movement of the lifting plate 42, the baffle 44 on the top of the lifting plate 42 moves downward synchronously with the lifting plate 42, so that the outer wall of the baffle 44 is in contact with the buffer wheel 620 of the stop block 62, reducing the collision wear of the components;

[0089] Repeat the above operation to place the second set of steel pipes, so that the joint of the two sets of steel pipes is aligned. The second set of steel pipes also triggers the corresponding unlocking component 7, which drives another set of pre-fixing components 5 to complete the pre-fixing. The two sets of pre-fixing components 5 respectively limit the area of ​​the two sets of steel pipes near the joint to prevent the steel pipes from tilting or shifting.

[0090] After pre-fixing is completed, the pneumatic components of the starter device are activated. The pneumatic components drive the pressing structure to move downward and press precisely on the areas of the two sets of steel pipes that are not pressed down by the pre-fixing components 5, i.e., the two ends or the middle area away from the butt joint. The pressure applied by the pneumatic components and the pressure of the pre-fixing components 5 work together, combined with the placement roller 2 below, to firmly fix the two sets of steel pipes in the preset position from the top and bottom, completely eliminating the risk of misalignment of the butt joint and providing a stable benchmark for welding operations.

[0091] After the steel pipes are completely fixed, the welding component 3 is started to weld the gaps. During the welding process, the placement roller 2 rotates under the drive of the external drive mechanism, which drives the two sets of steel pipes to rotate synchronously, so that the welding component 3 can perform continuous welding of the butt joint in the full circumference, ensuring the consistency of welding quality.

[0092] After welding is completed, first shut down welding component 3, then shut down pneumatic components, and the clamping structure is reset upwards. Remove the welded steel pipe, separating it from the transmission plate 71. Then, the transmission plate 71 is reset upwards under the elastic force of the third spring 72, driving the outward unlocking frame 73 and the lower pressure wheel 74 to move upwards. The lower pressure wheel 74 will squeeze the bottom slope of the guide block 64 to ensure that the lower pressure wheel 74 can be reset smoothly. Then, manually or with tools, pull the lifting plate 42 upwards, driving the lifting block 41 to move upwards along the inverted L-shaped support frame 40, compressing the first spring 43, until the bottom of the lifting plate 42 is higher than the top of the stop block 62. The stop block 62 is reset under the elastic force of the second spring 63, re-extends from the mounting box 61 and is supported at the bottom of the lifting plate 42. The device returns to its initial standby state, waiting for the next operation.

[0093] Throughout the entire process, the positions of the power component 4, pre-fixing component 5, limiting component 6, and unlocking component 7 are all staggered from the placement roller 2 to avoid mutual interference. Through the continuous process of "unlocking-pre-fixing-strong fixing-welding", the automated and high-precision welding of the steel pipe joint is achieved.

[0094] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0095] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0096] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding device for butt joints of steel pipes, comprising a device body (1), a placement roller (2), and a welding component (3), characterized in that: The device body (1) is equipped with a power component (4), which includes two sets of inverted L-shaped support frames (40) installed on the device body (1), and a lifting block (41) is slidably installed on the inverted L-shaped support frame (40). A lifting plate (42) is installed at the bottom of the lifting block (41), and a first spring (43) connected to the inverted L-shaped support frame (40) is installed on the lifting plate (42). A pre-fixing component (5) for pressing down the steel pipe is installed between the two sets of inverted L-shaped support frames (40), which includes: A transmission seat (50) is located between two sets of inverted L-shaped support frames (40), and a connector (51) is provided on the transmission seat (50) and the lifting block (41) for connecting the lifting block (41) and the transmission seat (50); The limiting wheel (52) has two sets installed on the outer wall of the transmission seat (50), and the limiting wheel (52) is equipped with balls (53). A limiting component (6) is installed on the device body (1). When in operation, the limiting component (6) supports the bottom of the lifting plate (42) to ensure that the lifting plate (42) cannot move downward. The device body (1) is also equipped with an unlocking component (7) located below the steel pipe on the placement roller (2). The limiting component (6) includes: Mounting base (60) is mounted on the device body (1), and mounting box (61) is mounted on the outer wall of the top of mounting base (60). A stop block (62) that is attached to the bottom of lifting plate (42) is slidably mounted inside mounting box (61). The second spring (63) is installed inside the top of the mounting base (60) and is connected to the inner end of the stop block (62); Guide block (64), which is mounted on the side wall of stop (62) for engaging with unlocking component (7); The unlocking component (7) includes: A storage box (70) is installed on top of the device body (1) and is located between the placement rollers (2). A transmission plate (71) that contacts the outer wall of the steel pipe is slidably installed inside the storage box (70). The third spring (72) is installed inside the storage box (70), and the top of the third spring (72) is fixedly connected to the transmission plate (71); An outward unlocking bracket (73) is fixedly installed on the outer wall of the transmission plate (71), and the outward unlocking bracket (73) is slidably connected to the storage box (70), and a pressing wheel (74) for pressing down the guide block (64) is rotatably installed on the outer end of the outward unlocking bracket (73). The guide block (64) has a sloping design on both the upper and lower sides, and the guide block (64) will contact the lower pressure wheel (74) during the lifting and moving process; the distance between the outer walls on both sides of the guide block (64) is greater than the length of the position where the stop block (62) and the lifting plate (42) are in contact; when the steel pipe is placed on the placement roller (2), the steel pipe will drive the unlocking component (7), and the unlocking component (7) will release the restriction of the limiting component (6) on the lifting plate (42) when it runs.

2. The welding device for butt joints of steel pipes according to claim 1, characterized in that: The connector (51) includes: A connecting seat (511) is installed at the end of the transmission seat (50), and a sliding block (512) is installed at the end of the connecting seat (511). A sliding groove (5120) corresponding to the sliding block (512) is opened on the outer wall of the lifting block (41). Bolt (513) is slidably connected to lifting block (41), and through hole (514) corresponding to bolt (513) is provided on lifting block (41). A threaded hole (515) is provided on the outer wall of the connecting seat (511) and the sliding block (512), and the threaded hole (515) is threadedly connected to the bolt (513).

3. The welding device for butt joints of steel pipes according to claim 2, characterized in that: The sliding block (512) has a rectangular cross-section, and the width of the sliding block (512) is smaller than the diameter of the connecting seat (511). The lifting block (41) has a storage groove (516) on the outer wall of the side away from the connector (51) that corresponds to the end of the bolt (513). The bolt (513) has a T-shaped cross section and the thickness of the outer end of the bolt (513) is less than the depth of the storage groove (516). The through hole (514) penetrates the lifting block (41), and multiple sets of through holes (514) are equally spaced on the lifting block (41). All sets of through holes (514) are connected to the storage groove (516) and the slide groove (5120).

4. The welding device for butt joints of steel pipes according to claim 1, characterized in that: The thickness of the outer end of the stop (62) is less than the thickness of its end inside the mounting box (61), and the top corner of the outer end of the stop (62) is designed with an arc-shaped rounded corner, and the surface of the stop (62) that is in contact with the bottom of the lifting plate (42) is a plane; A baffle (44) is fixedly installed on the top of the lifting plate (42) near the stop block (62), and the length of the baffle (44) is greater than the length of the lifting plate (42) moving down, and the installation position of the baffle (44) is offset from the first spring (43); Multiple sets of buffer wheels (620) are installed at equal intervals on the outer wall of the stop (62). During the process of the lifting plate (42) driving the baffle (44) to move down, the outer wall of the baffle (44) will come into contact with the buffer wheels (620).

5. A welding device for butt joints of steel pipes according to claim 4, characterized in that: The installation position of the transmission plate (71) is offset from that of the placement roller (2), and the top surface of the transmission plate (71) and the vertex of the placement roller (2) are located on the same plane; The third spring (72) is provided in multiple sets at equal intervals at the bottom of the transmission plate (71). The outward unlocking frame (73) and the downward pressure wheel (74) are symmetrically arranged on both sides of the transmission plate (71), and the positions of the outward unlocking frame (73) and the downward pressure wheel (74) are offset from the placement roller (2).

6. The welding device for butt joints of steel pipes according to claim 5, characterized in that: The mounting box (61) has an unlocking groove (65) through the outer wall of the side near the unlocking component (7) that corresponds to the pressure wheel (74) and the outward unlocking bracket (73), and the guide block (64) is located in the unlocking groove (65).

7. The welding device for butt joints of steel pipes according to claim 1, characterized in that: The positions of the components in the power unit (4), pre-fixing unit (5), limiting unit (6) and unlocking unit (7) are all offset from the installation position of the placement roller (2).

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