A protection device for a pipe pile welded joint

Abstract

The application discloses a protection device for a pipe pile welding joint, which comprises an auxiliary installation assembly, a spot welding positioning assembly and at least two butt welding synchronous assemblies. The auxiliary installation assembly is installed on the joint; the spot welding positioning assembly is provided with a plurality of positioning members which can slide around the joint axis and are uniformly distributed, and each of the positioning members is provided with a welding channel for spot welding. The two butt welding synchronous assemblies are both installed on the auxiliary installation assembly, each of the assemblies is provided with a synchronous member, a synchronous ring and a force transmission member, the synchronous ring rotates around the joint axis and is connected with the synchronous member, the synchronous ring is provided with a passing space for hands to pass through so as to move with the hands, and the force transmission member is arranged on the synchronous member; the force transmission member of one of the assemblies can abut against the synchronous member of the other assembly. The application can improve the synchronism of butt welding, and thus improves the crack resistance of the pipe pile welding joint.

Description

Technical Field

[0001] This invention relates to the field of pipe pile welded joint protection technology, and in particular to a protective device for pipe pile welded joints. Background Technology

[0002] In the construction of pipe pile foundations in coastal areas, the pipe pile joints often employ a two-person center-symmetrical welding process. This process requires the welders on both sides to maintain real-time matching in terms of heat input rate and start / stop timing to ensure a uniform circumferential distribution of cooling shrinkage stress in the weld metal. When the pile passes through a thick layer of fluid silt, the lateral friction of the silt layer is low, and the lateral and axial constraints on the pipe pile are limited. The axial tensile force generated by the cooling shrinkage of the weld on one side can easily overcome the soil resistance, causing instantaneous deviation or slippage of the pile. This asymmetrical displacement dynamically changes the bevel gap of the opposite side's welding area, forcing the welder to passively adjust the electrode speed and filler volume, thus breaking the preset symmetrical welding rhythm. When one side stops the arc due to interlayer slag removal, wire entanglement, or equipment pressure fluctuations, the sudden redistribution of pile stress will occur on the unsolidified weld pool on the opposite side, leading to shear strain. Furthermore, the arc light and noise isolation in the working environment make it difficult for both parties to perceive the other's arc-stopping status in a timely manner. All of these factors reduce the synchronization of the welding process, thereby reducing the crack resistance of the pipe pile welded joint. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention aims to provide a protective device for welded joints of pipe piles, which can improve the synchronization of welding and thus improve the crack resistance of welded joints of pipe piles.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A protective device for welded joints of pipe piles, comprising:

[0006] An auxiliary installation component, the auxiliary installation component being used for installation on the welded joint of the pipe pile;

[0007] A spot welding positioning assembly is provided on the auxiliary installation assembly. The spot welding positioning assembly has multiple positioning elements, each of which can slide around the axis of the pipe pile welding joint and is evenly distributed on the circumferential surface of the pipe pile welding joint; each of the positioning elements has a welding channel for spot welding.

[0008] At least two welding synchronization components are provided, and both of the welding synchronization components are mounted on the auxiliary mounting component; each welding synchronization component has a synchronizing element, a synchronizing ring, and a force transmission element.

[0009] In the same welding synchronization assembly, each synchronization ring is respectively about the axis of the pipe pile welding joint and rotates relative to the auxiliary installation assembly; the synchronization ring is connected to the synchronization member, and the synchronization ring has a passage space for a human hand to pass through so as to follow the movement of the human hand; the force transmission member is provided on the synchronization member;

[0010] In one of the welding synchronization components, the force transmission element can abut against the synchronization element in the other welding synchronization component.

[0011] Furthermore, the auxiliary installation component is cylindrical and includes two half-sleeves, which are locked to the pipe pile welding joint by a first locking member.

[0012] Furthermore, the spot welding positioning assembly also includes two first semi-circular guide rails, each of which is slidably connected to the corresponding half sleeve along the axial direction of the pipe pile welding joint, and the two first semi-circular guide rails are spliced ​​together to form a first annular guide rail; each positioning element is rotatably engaged with the first annular guide rail, and adjacent positioning elements are hinged to each other through connecting arms.

[0013] Furthermore, the positioning member is detachably connected to the connecting arm; the connecting arm includes two hinge rods, which are hinged to each other so that when multiple positioning members approach each other in the same rotation direction, the two hinge rods of each connecting arm approach each other, and each positioning member is located on one of the two first semi-circular guide rails.

[0014] Furthermore, the sliding method between the first annular guide rail and the auxiliary mounting component is damped sliding; the first annular guide rail is provided with a receiving groove, and the auxiliary mounting component is provided with a receiving part, the receiving part cooperating with the receiving groove so that the auxiliary mounting component supports the corresponding first annular guide rail.

[0015] Furthermore, each of the half-sleeves is provided with a second semi-circular guide rail, which is distributed sequentially along the axis of the welded joint of the pipe pile; the second semi-circular guide rails in each half-sleeve are spliced ​​together to form a second annular guide rail, and there are two of the second annular guide rails; each of the synchronizing elements is rotatably connected to the second annular guide rail.

[0016] Furthermore, the welding synchronization assembly also includes a synchronization arm, which is hinged to one end of the synchronization member, and the synchronization ring is hinged to the other end of the synchronization member via a universal hinge.

[0017] Furthermore, the welding synchronization assembly also includes a bidirectional threaded rod and a knob; the bidirectional threaded rod is horizontally pivotally connected to the synchronization member and connected to the knob so as to follow the rotation of the knob; both force transmission members are horizontally slidably connected to the synchronization member, and both force transmission members are threadedly connected to the bidirectional threaded rod so that when the bidirectional threaded rod rotates, the two force transmission members can move closer to or further away from each other.

[0018] Furthermore, the synchronizing element includes two semi-circular connecting parts, which are locked or unlocked by a second locking element; when the two semi-circular connecting parts are unlocked, both semi-circular connecting parts can disengage from the second annular guide rail.

[0019] Furthermore, the two welding synchronization components and spot welding positioning components are distributed vertically from top to bottom; the force transmission component is connected to a buffer pad.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The auxiliary installation component is used for installation on the welded joint of the pipe pile. As the bearing base of all functional components, the auxiliary installation component integrates the spot welding positioning component and the butt welding synchronization component into one and fixes it at the joint. This allows the spot welding positioning and synchronization feedback processes to be completed continuously within the same tooling system without the need for repeated disassembly and assembly of different tooling. This avoids the accumulation of positioning errors caused by multiple clamping, ensures the accuracy of spot welding positioning and the consistency of the reference of the synchronization feedback mechanism, and thus provides stable constraints for subsequent continuous welding. This ensures the forming quality and crack resistance of the welded joint from the source.

[0022] 2. Based on the spot welding positioning component set in the auxiliary installation component, the spot welding positioning component has multiple positioning elements, each of which can slide around the axis of the pipe pile welding joint and is evenly distributed on the circumferential surface of the pipe pile welding joint. Each positioning element has a welding channel for spot welding. Multiple positioning elements are evenly arranged along the circumference of the joint, allowing the welder to perform multi-point symmetrical spot welding on the bevel through the welding channels on each positioning element. This multi-point uniform spot welding method enables the upper and lower pipe pile sections to achieve balanced initial fixation in all directions of the circumference, effectively limiting the joint misalignment and bevel edge misalignment caused by unilateral shrinkage or external force disturbance during the welding process. This allows subsequent continuous welding to be carried out under the condition of uniform bevel gap and good alignment, avoiding local stress concentration caused by uneven spot welding, thereby ensuring the fusion quality of the weld root and the crack resistance of the joint.

[0023] 3. Based on at least two welding synchronization components installed on the auxiliary installation component; each welding synchronization component has a synchronization element, a synchronization ring, and a force transmission element. The synchronization rings rotate around the axis of the pipe pile welding joint and relative to the auxiliary installation component. The synchronization rings are connected to the synchronization elements and have a passage space for the human hand to pass through, so as to follow the movement of the human hand. The force transmission element is located on the synchronization element. In the same component, the synchronization element rotates independently around the axis of the pipe pile relative to the auxiliary installation component, so that the synchronization element can move freely along the circumference of the pipe pile with the welder's hand without being interfered with by the movement of the auxiliary installation component. After the hand passes through the passage space on the synchronization element, it forms a direct following relationship with the synchronization element, and the speed signal response is fast. The force transmission element is fixed on the synchronization element and moves with it. When a speed deviation occurs, the force transmission element directly contacts the other synchronization element and immediately feeds back the speed state of the other party to the welder's hand on the faster side in the form of contact resistance. In this cooperative manner, the two welders can sense each other's speed changes in real time through touch throughout the entire circumferential weld and actively adjust their own rhythm to avoid the accumulation of speed deviations. This ensures the balance of heat input and cooling shrinkage rate on both sides of the weld, so that the weld metal is evenly distributed along the circumferential shrinkage stress without generating local stress concentration and additional shear stress. This reduces the probability of transverse cracks at the weld root and the initiation of brittle structures in the fusion zone from the source, and comprehensively protects the crack resistance and mechanical integrity of the pipe pile welded joint.

[0024] 4. Based on the fact that in one of the welding synchronization components, the force transmission component can abut against the synchronization component in the other welding synchronization component, when the welding speeds of the two sides are inconsistent, the force transmission component on the faster side of the synchronization component directly abuts against the slower side of the synchronization component, converting the speed deviation into a contact resistance that can be perceived by the hand, rather than relying on the transmission of sound and light signals. This mechanical contact method can still ensure the reliable transmission of feedback signals in the welding environment with dazzling arc light; at the same time, the resistance generated by the contact gradually increases with the increase of speed deviation, which has a gradual characteristic rather than a sudden impact, allowing the welder to judge the degree of deceleration of the other party based on the magnitude of the resistance, and thus make appropriate speed adjustments, avoiding cold joints or sudden changes in heat input caused by sudden stops and starts, so that the cooling rate and shrinkage of the welds on both sides tend to be consistent, effectively reducing the probability of transverse cracks at the weld root and brittle structures in the fusion zone, and comprehensively protecting the mechanical integrity and crack resistance of the welded joint. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a protective device for welded joints of pipe piles according to the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the auxiliary installation components and the first semi-circular guide rail;

[0027] Figure 3 for Figure 1A partial structural diagram of the center spot welding positioning assembly;

[0028] Figure 4 for Figure 1 A schematic diagram of the structure of the synchronous welding assembly.

[0029] In the diagram: 1. Auxiliary installation component; 11. Half sleeve; 111. Second half-ring guide rail; 2. Spot welding positioning component; 21. Positioning component; 22. First half-ring guide rail; 23. Connecting arm; 231. Hinge rod; 3. Butt welding synchronization component; 31. Synchronizing component; 311. Semi-circular connecting component; 32. Synchronizing ring; 33. Force transmission component; 34. Synchronizing arm; 35. Bidirectional threaded rod; 36. Knob; 4. Buffer pad; 5. Welding channel. Detailed Implementation

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] See Figures 1-4 The specific implementation methods of all embodiments of the present invention are as follows:

[0034] A protective device for welded joints of pipe piles includes an auxiliary installation component 1, a spot welding positioning component 2, and at least two butt welding synchronization components 3.

[0035] Auxiliary installation component 1 is used for installation on the welded joint of the pipe pile;

[0036] The spot welding positioning assembly 2 is located on the auxiliary installation assembly 1. The spot welding positioning assembly 2 has multiple positioning elements 21. Each positioning element 21 can slide around the axis of the pipe pile welding joint and is evenly distributed on the circumferential surface of the pipe pile welding joint. Each positioning element 21 has a welding channel 5 for spot welding.

[0037] At least two butt welding synchronization components 3 are installed on the auxiliary installation component 1; each butt welding synchronization component 3 has a synchronization element 31, a synchronization ring 32 and a force transmission element 33;

[0038] In the same butt welding synchronization assembly 3, each synchronization ring 32 is respectively around the axis of the pipe pile welding joint and rotates relative to the auxiliary installation assembly 1; the synchronization ring 32 is connected to the synchronization component 31, and the synchronization ring 32 has a passage space for the human hand to pass through so as to follow the movement of the human hand; the force transmission component 33 is provided on the synchronization component 31.

[0039] In one of the welding synchronization components 3, the force transmission element 33 can abut against the synchronization element 31 in the other welding synchronization component 3.

[0040] The working principle of a protective device for welded joints of pipe piles according to the present invention is as follows: After the auxiliary installation component 1 is installed on the welded joint of the pipe pile, the spot welding positioning component 2 is put into use first. Each positioning component 21 is evenly distributed around the joint circumference. The welder performs spot welding positioning on the joint through the welding channel 5 on each positioning component 21, so that the upper and lower sections of the pipe pile are initially fixed in the circumferential direction. After the spot welding is completed, the spot welding positioning component 2 is removed or moved to make room for subsequent continuous welding. Two welders operate their respective corresponding welding synchronization components 3. In each welding synchronization component 3, the synchronization ring 32 is fitted on the outer circumference of the pipe pile and can rotate independently around the axis of the pipe pile. The synchronization ring 32 connected to the synchronization component 31 is provided with a passage space for the human hand to pass through. After the welder passes through the passage space with his hand and welding equipment, the synchronization component 31 follows the hand. The two welders are located on opposite sides of the joint and start arc welding at the same time and walk along the circumference of the pipe pile. During this process, the two synchronization components 31 rotate synchronously with their respective welders. When the welders on both sides walk at the same speed, the relative positions of the two synchronization components 31 remain unchanged, and the force transmission components 33 in each welding synchronization assembly 3 do not contact each other. When a welder on one side slows down or stops due to interlayer slag removal or equipment adjustment, the corresponding synchronization component 31 slows down or stops accordingly. The force transmission components 33 on the synchronization component 31 on the other side, which continues to move, gradually approach and eventually contact the slowing-down synchronization component 31. The contact resistance generated by the contact is transmitted through the synchronization component 31 to the hand of the faster-moving welder, allowing the welder to perceive the change in the other's speed through touch, thereby actively slowing down or pausing welding. After the other recovers, the welder can restart the arc and move forward synchronously. The core of the entire working process is to use the relative position change of the synchronization component 31 and the force transmission component 33 to convert the difference in walking speed between the welders on both sides into a contact resistance that can be perceived by the hand. Through pure mechanical contact, real-time feedback and prompts of speed deviation are achieved, allowing the welder to judge the other's operating status by touch in an environment of arc light and noise, and thus actively adjust their own welding rhythm.

[0041] Obviously, the auxiliary installation component 1 is used to install on the welded joint of the pipe pile. As the bearing base of all functional components, the auxiliary installation component 1 integrates the spot welding positioning component 2 and the butt welding synchronization component 3 into one and fixes it at the joint. This allows the spot welding positioning and synchronization feedback processes to be completed continuously within the same tooling system without the need for repeated disassembly and assembly of different tooling. This avoids the accumulation of positioning errors caused by multiple clamping and ensures the accuracy of spot welding positioning and the consistency of the reference of the synchronization feedback mechanism. This provides stable constraints for subsequent continuous welding and ensures the forming quality and crack resistance of the welded joint from the source.

[0042] Based on the spot welding positioning component 2 installed on the auxiliary installation component 1, the spot welding positioning component 2 has multiple positioning elements 21. Each positioning element 21 can slide around the axis of the pipe pile welding joint and is evenly distributed on the circumferential surface of the pipe pile welding joint. Each positioning element 21 has a welding channel 5 for spot welding. The multiple positioning elements 21 are evenly arranged along the circumference of the joint, so that the welder can perform multi-point symmetrical spot welding on the bevel through the welding channel 5 on each positioning element 21. This multi-point uniform spot welding method enables the upper and lower pipe pile sections to be evenly and initially fixed in all directions of the circumference. It effectively limits the joint deviation and bevel misalignment caused by unilateral shrinkage or external force disturbance during the welding process, so that subsequent continuous welding can be carried out under the condition of uniform bevel gap and good alignment. It avoids local stress concentration caused by uneven spot welding, thereby ensuring the fusion quality of the weld root and the crack resistance of the joint.

[0043] At least two welding synchronization components 3 are installed on the auxiliary installation component 1. Each welding synchronization component 3 has a synchronization element 31, a synchronization ring 32, and a force transmission element 33. The synchronization ring 32 rotates around the axis of the pipe pile welding joint and relative to the auxiliary installation component 1. The synchronization ring 32 is connected to the synchronization element 31 and has a passage space for the human hand to pass through so as to follow the movement of the human hand. The force transmission element 33 is located on the synchronization element 31. In the same component, the synchronization ring 32 rotates independently around the axis of the pipe pile relative to the auxiliary installation component 1, so that the synchronization element 31 can move freely along the circumference of the pipe pile with the welder's hand without being interfered with by the movement of the auxiliary installation component 1. After the hand passes through the passage space on the synchronization element 31, it forms a direct following relationship with the synchronization element 31, and the speed signal response is fast. The force transmission element 33 is fixed on the synchronization element 31 and moves with it. When a speed deviation occurs, the force transmission element 33 directly contacts the other synchronization element 31 and immediately feeds back the speed state of the other party to the welder's hand on the faster side in the form of contact resistance. In this cooperative manner, the two welders can sense each other's speed changes in real time through touch throughout the entire circumferential weld and actively adjust their own rhythm to avoid the accumulation of speed deviations. This ensures the balance of heat input and cooling shrinkage rate on both sides of the weld, so that the weld metal is evenly distributed along the circumferential shrinkage stress without generating local stress concentration and additional shear stress. This reduces the probability of transverse cracks at the weld root and the initiation of brittle structures in the fusion zone from the source, and comprehensively protects the crack resistance and mechanical integrity of the pipe pile welded joint.

[0044] Based on the fact that in one of the welding synchronization components 3, the force transmission component 33 can abut against the synchronization component 31 in the other welding synchronization component 3, when the welding speeds of the two welders are inconsistent, the force transmission component 33 on the faster side synchronization component 31 directly abuts against the slower side synchronization component 31, converting the speed deviation into a contact resistance that can be perceived by the hand rather than relying on the transmission of sound and light signals. This mechanical contact method can still ensure the reliable transmission of feedback signals in the welding environment where the arc light is dazzling; at the same time, the resistance generated by the contact gradually increases with the increase of the speed deviation, which has a gradual characteristic rather than a sudden impact, allowing the welder to judge the degree of deceleration of the other party based on the magnitude of the resistance, and thus make appropriate speed adjustments, avoiding cold joints or sudden changes in heat input caused by sudden stops and starts, so that the cooling rate and shrinkage of the welds on both sides tend to be consistent, effectively reducing the probability of transverse cracks at the weld root and brittle structures in the fusion zone, and comprehensively protecting the mechanical integrity and crack resistance of the welded joint.

[0045] It is worth noting that the auxiliary installation component 1 in this invention can adopt a split clamp structure surrounding the pipe pile joint, consisting of two semi-circular steel clamps fastened to the outer wall of the pipe pile by bolts, or a clamp-type mounting base with an inner rubber pad to achieve anti-slip fixation and adapt to the clamping requirements of different pipe diameters; each positioning element 21 in the spot welding positioning component 2 can adopt a guide sleeve structure that is radially slidably installed in the guide groove of the auxiliary installation component 1, with each guide sleeve evenly distributed along the circumference of the joint and its inner hole forming a welding channel 5. After spot welding, each guide sleeve is slid outward along the guide groove to exit the joint area to achieve displacement and avoidance, or a flip-type positioning block structure hinged to the edge of the auxiliary installation component 1 can be adopted. When in use, it is flipped to the surface of the pipe pile, and the guide hole on it provides a welding rod channel. After spot welding, it is flipped back to achieve displacement, or it can adopt a flip-type positioning block structure that is hinged to the edge of the auxiliary installation component 1. An annular sliding sleeve structure is used, which is fitted around the outer periphery of the auxiliary installation component 1 and can slide along the axis of the pipe pile. When each positioning component 21 is fixed to the lower end face of the annular sliding sleeve and is fitted into the joint position together with the annular sliding sleeve, each positioning component 21 covers the weld bevel. After spot welding is completed, the annular sliding sleeve is slid upward along the axis of the pipe pile to move as a whole to the upper non-welding area, thereby making room for continuous circumferential welding. The synchronous ring 32 in the welding synchronous component 3 can be an annular bracket fitted around the outer periphery of the pipe pile and rotated with the auxiliary installation component 1 through a rolling bearing or a sliding ring. The synchronous component 31 can be an arc-shaped lever fixed to the synchronous ring 32 and extending circumferentially. The arc-shaped lever has an open ring buckle in the middle for the hand (holding the welding gun) to pass through. The force transmission component 33 can be a rubber buffer block or spring contact fixed to the end of the arc-shaped lever.

[0046] Preferably, the auxiliary installation component 1 is cylindrical and includes two half-sleeves 11, which are locked to the pipe pile welding joint by a first locking member.

[0047] The auxiliary installation component 1 is cylindrical and consists of two half-sleeves 11 locked to the pipe pile welding joint by a first locking element (such as threaded connection, snap connection, bolt locking, etc., the first locking element is not shown in the figure). This split cylindrical structure can be directly hugged and installed from the side of the pipe pile without needing to be sleeved from the end. In on-site construction, it is not limited by the height of the pipe pile already sunk or the space occupied by the crane. The installation and disassembly operations are simple and quick. At the same time, the cylindrical structure forms a complete annular closed constraint after locking, providing a stable circumferential installation reference for the spot welding positioning component 2 and the butt welding synchronization component 3, ensuring that the synchronization mechanisms on both sides are on the same horizontal plane and concentric axis, thereby maintaining the welding speed synchronization accuracy, so that the cooling shrinkage stress of the weld is evenly distributed along the circumference, and avoiding local stress concentration that damages the joint.

[0048] Preferably, the spot welding positioning assembly 2 further includes two first semi-circular guide rails 22, each of which is slidably connected to the corresponding half sleeve 11 along the axial direction of the pipe pile welding joint, and the two first semi-circular guide rails 22 are spliced ​​together to form a first annular guide rail; each positioning element 21 is rotatably engaged with the first annular guide rail, and two adjacent positioning elements 21 are hinged to each other through a connecting arm 23.

[0049] After the first semi-circular guide rail 22 is installed separately with the half sleeve 11, it is assembled into a ring, allowing each positioning component 21 to slide around the joint circumference along the annular guide rail and achieve linkage adjustment through the hinged connecting arm 23. This allows for the rapid and uniform distribution of each positioning component 21 along the circumference without the need for individual adjustments, thus improving the efficiency of spot welding positioning. At the same time, after positioning, the first semi-circular guide rail 22, together with each positioning component 21, is slid out of the joint area along the axial direction as a whole, realizing the overall displacement and avoidance of the positioning components rather than disassembly one by one. This avoids the positioning components 21 obstructing the welder's line of sight and the space for the welding torch to swing, and reduces the accumulation of positioning errors caused by repeated disassembly and assembly. This allows the joint to enter the continuous welding process in a fully exposed state after being uniformly spot welded and fixed, with uniform groove gaps and good alignment, effectively ensuring the fusion quality of the weld root and the crack resistance of the joint.

[0050] Preferably, the positioning member 21 is detachably connected to the connecting arm 23; the connecting arm 23 includes two hinge rods 231, which are hinged to each other so that when multiple positioning members 21 approach each other in the same rotation direction, the two hinge rods 231 of each connecting arm 23 approach each other, and each positioning member 21 is located on one of the two first semi-circular guide rails 22.

[0051] When multiple positioning components 21 approach each other along the same rotation direction, the hinge rods 231 retract accordingly, allowing the positioning components 21 to be concentrated on one of the first semi-circular guide rails 22. This avoids the retracted position of the positioning components 21 interfering with the disassembly of the two first semi-circular guide rails 22. Before spot welding, each positioning component 21 is unfolded and slid along the guide rail to a uniformly distributed position. After spot welding, each positioning component 21 is retracted and concentrated, allowing the entire positioning assembly to be removed from the joint area. This detachable and retractable structure makes the loading and unloading of the positioning components 21 more flexible in small spaces. It also facilitates the rapid concentration and overall removal of each positioning component 21 after spot welding, further improving the operational efficiency of spot welding positioning and displacement avoidance. This allows the welded joint to enter continuous welding without obstruction after uniform spot welding and fixation, ensuring that welders on both sides can walk and weld continuously along the complete circumference. This avoids interruption of the welding path or discontinuity of the weld due to obstruction by the positioning components 21, thereby ensuring the continuity, uniformity, and crack resistance of the entire circumferential weld. The number of spot welds on the weld joint of the pipe pile can be four to six, and correspondingly, the positioning element 21 can be four to six (corresponding to the welding channel 5).

[0052] Preferably, the sliding method between the first annular guide rail and the auxiliary mounting component 1 is damped sliding; the first annular guide rail is provided with a receiving groove (not shown in the figure), and the auxiliary mounting component 1 is provided with a receiving part (not shown in the figure). The receiving part cooperates with the receiving groove so that the auxiliary mounting component 1 supports the corresponding first annular guide rail.

[0053] Damped sliding allows the first annular guide rail to remain stably in its current position when no external force is applied, avoiding accidental slippage caused by vibration or its own weight during spot welding, which could affect the positioning accuracy. The support and cooperation between the receiving part and the receiving groove utilizes the supporting force of the auxiliary installation component 1 to balance the weight of the first annular guide rail and each positioning component 21 on it, preventing the positioning component as a whole from sliding down along the axis of the pipe pile. Especially when the half sleeve 11 is tightly held against the outer wall of the pipe pile and the positioning component is located below, it can effectively maintain the height alignment of the positioning component 21 with the weld bevel, ensuring that each spot welding position is accurate and consistent, so that the joint obtains uniform and reliable positioning and fixing, providing good bevel alignment conditions for subsequent continuous welding, thereby ensuring the fusion quality of the weld root and the crack resistance of the joint.

[0054] Preferably, each half-sleeve 11 is provided with a second half-ring guide rail 111, and the second half-ring guide rail 111 are distributed sequentially along the axis of the welded joint of the pipe pile; the second half-ring guide rails 111 in each half-sleeve 11 are spliced ​​to form a second ring guide rail, and there are two second ring guide rails; each synchronizing element 31 is rotatably connected to the second ring guide rail.

[0055] At least two welding synchronization components 3 are respectively installed on two independent second annular guide rails, so that the synchronization components 31 of the two welders can rotate independently on their respective guide rails without interfering with each other's movement trajectory. At the same time, the two guide rails are staggered vertically along the axial direction to avoid spatial interference and collision between the two sets of synchronization components 31 during circumferential movement. The two synchronization components 31 are located at different axial height positions, each with its own independent passage space and movement plane, allowing the two welders to stand on opposite sides of the joint and operate independently without having to worry about the space occupied by the other's synchronization component 31. This ensures the free movement and continuous signal transmission of the two sets of synchronization feedback mechanisms throughout the entire circumferential stroke, thereby ensuring that the welding speed synchronization feedback is uninterrupted throughout the entire circumferential weld welding process, and that the weld heat input and cooling shrinkage are uniform, protecting the joint from damage caused by local stress concentration.

[0056] Preferably, the welding synchronization assembly 3 further includes a synchronization arm 34, which is hinged to one end of the synchronization member 31, and the synchronization ring 32 is hinged to the other end of the synchronization member 31 via a universal hinge.

[0057] The articulated structure of the synchronous arm 34 allows it to adaptively adjust its angle as the welder's arm swings, avoiding the limitations imposed by rigid connections on the range of hand movement. This allows the welder's arm to extend and retract naturally as they walk along the circumference of the pipe pile, reducing operator fatigue. The universal hinge allows the synchronous ring 32 to adapt to the changes in hand posture at different welding positions as it follows the hand's movement. This ensures that the synchronous ring 32 remains in contact with the hand and does not slip out of the passageway, allowing the hand speed signal to be continuously collected and transmitted at each welding position. This ensures uninterrupted synchronous feedback of the entire circumferential weld at various spatial angles, resulting in a balanced distribution of cooling and shrinkage stress in the circumferential weld, avoiding localized stress concentration, and protecting the welded joint to achieve uniform weld quality and crack resistance even under complex spatial postures.

[0058] Preferably, the welding synchronization assembly 3 further includes a bidirectional threaded rod 35 and a knob 36; the bidirectional threaded rod 35 is horizontally pivotally connected to the synchronization member 31 and connected to the knob 36 so as to rotate with the knob 36; both force transmission members 33 are horizontally slidably connected to the synchronization member 31, and both force transmission members 33 are threadedly connected to the bidirectional threaded rod 35 so that when the bidirectional threaded rod 35 rotates, the two force transmission members 33 can move closer to or further away from each other.

[0059] When knob 36 is rotated, the bidirectional threaded rod 35 drives the two force transmission components 33 to move closer or further apart in the horizontal direction, thereby adjusting the initial distance between the two force transmission components 33. This adjustable structure allows the welder to pre-adjust the initial position of the force transmission components 33 according to the pipe pile diameter or weld bevel width, ensuring that under different pipe pile specifications, the faster-moving force transmission component 33 can contact the opposite synchronization component 31 with a shorter stroke. This avoids the problem of insufficient stroke of the force transmission component 33 due to changes in pipe diameter, resulting in ineffective contact, or premature contact and false feedback due to excessively short stroke. Through this adaptive adjustment, the synchronization feedback mechanism can maintain effective speed deviation response stroke and feedback sensitivity under various pipe pile diameters, ensuring the welding speed synchronization accuracy during the welding process of pipe piles of different specifications. This ensures that pipe pile joints of all diameters can obtain a uniform weld cooling shrinkage stress distribution, avoiding feedback failure or deviation accumulation due to stroke mismatch, and protecting the crack resistance of various pipe pile welded joints.

[0060] Preferably, the synchronizing element 31 includes two semi-circular connecting elements 311, which are locked or unlocked by a second locking element; when the two semi-circular connecting elements 311 are unlocked, both semi-circular connecting elements 311 can disengage from the second annular guide rail.

[0061] The split structure of the two semi-circular connectors 311 allows the synchronizing component 31 to be unlocked and disassembled from the radial direction of the pipe pile after welding by using the second locking component (such as threaded connection, snap connection, bolt locking, etc., not shown in the figure). This prevents the structure from being unable to be removed from the tooling axially due to constraints on both pipe piles after welding. Simultaneously, this structure facilitates independent replacement of a single semi-circular connector 311 in case of damage, eliminating the need to scrap the entire synchronizing component 31, thus reducing maintenance costs and spare parts inventory pressure. After welding, the entire protective device can be quickly and easily removed radially from the joint, avoiding bumps or scratches to the welded joint during disassembly. This ensures both synchronized welding speed and protection of the finished joint while maintaining construction efficiency.

[0062] Preferably, the two butt welding synchronous components 3 and the spot welding positioning component 2 are distributed from top to bottom in the vertical direction; the force transmission component 33 is connected to a buffer pad 4.

[0063] Two synchronous welding components 3 and spot welding positioning components 2 are arranged vertically from top to bottom. This layered arrangement makes each component spatially independent, avoiding motion interference. At the same time, the two sets of synchronous components are located at different heights, allowing two welders to move freely on their respective planes without interfering with each other's operating space, resulting in smooth process transitions. The buffer pad 4 on the force transmission component 33 transforms rigid collisions into gradually increasing resistance through elastic deformation at the moment of impact, making the feedback signal smooth and gentle. This avoids hand tremors caused by hard impacts, which could affect weld formation. Welders can accurately judge the opponent's speed changes based on the gradual change in resistance and smoothly adjust their own rhythm, ensuring balanced heat input and cooling contraction on both sides of the weld and preventing impact stress damage to the weld joint.

[0064] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0066] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A protective device for welded joints of pipe piles, characterized in that, include: Auxiliary installation component (1), the auxiliary installation component (1) is used for installation on the welded joint of the pipe pile; A spot welding positioning assembly (2) is provided on the auxiliary installation assembly (1). The spot welding positioning assembly (2) has multiple positioning elements (21). Each positioning element (21) can slide around the axis of the pipe pile welding joint and is evenly distributed on the circumferential surface of the pipe pile welding joint. Each positioning element (21) has a welding channel (5) for spot welding. At least two welding synchronization components (3) are installed on the auxiliary mounting component (1); each welding synchronization component (3) has a synchronization element (31), a synchronization ring (32) and a force transmission element (33). In the same welding synchronization assembly (3), each synchronization ring (32) is respectively about the axis of the pipe pile welding joint and rotates relative to the auxiliary installation assembly (1); the synchronization ring (32) is connected to the synchronization member (31), and the synchronization ring (32) has a passage space for the human hand to pass through so as to follow the movement of the human hand; the force transmission member (33) is provided on the synchronization member (31). In one of the welding synchronization components (3), the force transmission element (33) can abut against the synchronization element (31) in the other welding synchronization component (3).

2. The protective device for welded joints of pipe piles according to claim 1, characterized in that, The auxiliary installation component (1) is cylindrical and includes two half sleeves (11). The two half sleeves (11) are locked to the pipe pile welding joint by a first locking member.

3. A protective device for welded joints of pipe piles according to claim 2, characterized in that, The spot welding positioning assembly (2) also includes two first semi-circular guide rails (22), each of which is slidably connected to the corresponding half sleeve (11) along the axial direction of the pipe pile welding joint. The two first semi-circular guide rails (22) are spliced ​​together to form a first annular guide rail. Each positioning element (21) is rotatably engaged with the first annular guide rail, and two adjacent positioning elements (21) are hinged to each other through a connecting arm (23).

4. A protective device for welded joints of pipe piles according to claim 3, characterized in that, The positioning element (21) is detachably connected to the connecting arm (23); the connecting arm (23) includes two hinge rods (231), which are hinged to each other so that when multiple positioning elements (21) approach each other in the same rotation direction, the two hinge rods (231) of each connecting arm (23) approach each other, and each positioning element (21) is located on one of the two first semi-circular guide rails (22).

5. A protective device for welded joints of pipe piles according to claim 4, characterized in that, The sliding method between the first annular guide rail and the auxiliary installation component (1) is damped sliding; the first annular guide rail is provided with a receiving groove, and the auxiliary installation component (1) is provided with a receiving part, which cooperates with the receiving groove so that the auxiliary installation component (1) supports the corresponding first annular guide rail.

6. A protective device for welded joints of pipe piles according to claim 2, characterized in that, Each of the half-sleeves (11) is provided with a second semi-circular guide rail (111), which is distributed sequentially along the axis of the welded joint of the pipe pile; the second semi-circular guide rails (111) in each half-sleeve (11) are spliced ​​together to form a second annular guide rail, and there are two second annular guide rails; each of the synchronizing elements (31) is rotatably connected to the second annular guide rail.

7. A protective device for welded joints of pipe piles according to claim 6, characterized in that, The welding synchronization assembly (3) also includes a synchronization arm (34), which is hinged to one end of the synchronization member (31), and the synchronization ring (32) is hinged to the other end of the synchronization member (31) via a universal hinge.

8. A protective device for welded joints of pipe piles according to claim 7, characterized in that, The welding synchronization assembly (3) further includes a bidirectional threaded rod (35) and a knob (36); the bidirectional threaded rod (35) is horizontally pivotally connected to the synchronization member (31) and connected to the knob (36) so as to follow the rotation of the knob (36); both force transmission members (33) are horizontally slidably connected to the synchronization member (31), and both force transmission members (33) are threadedly connected to the bidirectional threaded rod (35) so that when the bidirectional threaded rod (35) rotates, the two force transmission members (33) can move closer to or further away from each other.

9. A protective device for welded joints of pipe piles according to claim 8, characterized in that, The synchronizing element (31) includes two semicircular connectors (311), which are locked or unlocked by a second locking element; when the two semicircular connectors (311) are unlocked, both semicircular connectors (311) can disengage from the second annular guide rail.

10. A protective device for welded joints of pipe piles according to claim 8, characterized in that, The two welding synchronization components (3) and spot welding positioning components (2) are distributed vertically from top to bottom; the force transmission component (33) is connected to a buffer pad (4).

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