Self-adaptive hydraulic overturning and welding device for bus shelter main beam
By using the arc-shaped pressure plate, preheating mechanism, and cooling system of the adaptive hydraulic flipping and welding device, the problem of uneven preheating in the welding area of the main beam of the bus shelter was solved. This achieved precise positioning, uniform preheating, and rapid cooling, improving welding quality and efficiency while reducing safety risks and equipment debugging difficulties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-04-14
AI Technical Summary
In traditional welding processes, the preheating temperature of the main beam welding area of bus shelters is uneven and difficult to control precisely, resulting in reduced toughness of the weld joint, high cold shrinkage stress, and defects such as weld cracking and surface deformation.
An adaptive hydraulic tilting and welding device is adopted, combined with an arc-shaped pressure plate, a preheating mechanism and a cooling system, to achieve precise positioning and uniform preheating of the main beam. Precise preheating is achieved by outputting heat flow through a heat exchanger. During the welding process, the motor drives the rotating drum to achieve automated wire feeding, and rapid cooling is achieved after welding to reduce heat input and welding stress.
It improves the mechanical properties and dimensional accuracy of welded joints, reduces weld cracking and surface damage, increases welding efficiency and quality consistency, and reduces the risks of manual operation and the difficulty of equipment debugging.
Smart Images
Figure CN121848028A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of main beam welding technology, and in particular to an adaptive hydraulic tilting and welding device for the main beam of a bus shelter. Background Technology
[0002] The main beam of the bus shelter is powered by hydraulic oil. A hydraulic pump, in conjunction with a lever mechanism, converts this power into a tilting force, enabling the main beam to tilt. In extreme weather conditions such as strong winds, heavy rain, or snow accumulation, the system can adjust the angle of the main beam to optimize drainage or wind resistance, extending the service life of the bus shelter. As the core load-bearing component of the bus shelter, the structural strength and stability of the main beam directly determine its service life and safety performance. The welding process is a crucial step in the manufacturing of the main beam, and the quality of the welding has a decisive impact on its mechanical properties. In traditional welding processes, preheating of the welding area of the main beam often uses flame heating or overall furnace heating, which suffers from uneven preheating temperatures and difficulty in precisely controlling the preheating range. Excessive preheating in some areas can lead to coarse grains in the base metal, reducing the toughness of the weld joint; insufficient preheating in other areas results in a large temperature difference between the base metal and the weld metal during welding, generating significant cold shrinkage stress, which can lead to weld cracking, surface deformation of the main beam, and other defects. Summary of the Invention
[0003] The purpose of this invention is to provide an adaptive hydraulic flipping and welding device for the main beam of a bus shelter, so as to solve the problems mentioned in the background art, which mostly use flame heating or overall furnace heating for preheating the welding area of the main beam, resulting in uneven preheating temperature and difficulty in accurately controlling the preheating range.
[0004] To achieve the above objectives, the present invention provides the following technical solution: an adaptive hydraulic tilting and welding device for the main beam of a bus shelter, comprising a base, a welding frame disposed at the top of the base near the main beam material, a welding mechanism disposed at the output end of the welding frame, the welding mechanism comprising a spot welding pipe body disposed at the bottom end of the welding frame, a preheating mechanism disposed on the outside of the welding frame, the preheating mechanism comprising a heat exchanger fixedly installed on one side of the welding frame, an inlet heat pipe and an outlet heat pipe respectively connected to the two ends of the heat exchanger, a pressure plate disposed at one end of the spot welding pipe body, and multiple air grooves opened at the bottom end of the pressure plate, the inlet heat pipe and the outlet heat pipe respectively connected to the two sides of the air grooves, an elastic sealing air pipe fixedly installed on the outer surface of the pressure plate, the sealing air pipe being connected to the inlet heat pipe through a flexible hose, and a one-way air valve disposed on the sealing air pipe; the heat exchanger also having a cold air output end, the cold air output end being connected to the air grooves of the pressure plate through a control valve.
[0005] As a preferred embodiment of the present invention, the pressure plate has an internal heat insulation zone, and multiple carbon rods for odor adsorption are installed inside the heat insulation zone and connected by rigid components.
[0006] As a preferred embodiment of the present invention, a support ring is installed on the outer side of the spot-welded pipe body by screws, and multiple support rods are fixedly installed on the outer surface of the support ring by ball hinges. A limiting magnetic plate is rotatably installed on the free end of the support rods, and a fixed magnetic plate is correspondingly provided on the top end of the pressure plate. Through the cooperation of the ball hinge and the rotatable installation, the limiting magnetic plate can adaptively fit the angle of the fixed magnetic plate to achieve flexible adsorption connection.
[0007] As a preferred embodiment of the present invention, the bottom end of the welding frame is fixedly installed with two assembled mounting plates for stabilizing the spot welded pipe body, and the spot welded pipe body passes through the middle of the two mounting plates. The cold air output end of the heat exchanger is connected to an air outlet pipe for rapidly cooling the welding area. The air outlet pipe is connected to the inside of the mounting plate through a protective pipe, and the mounting plate is connected to the inside of the pressure plate through a control valve.
[0008] As a preferred embodiment of the present invention, a welding cylinder is installed at the bottom of the welding frame, and a connecting pipe is installed on the outside of the welding cylinder through a heating box. A heat transfer pipe is fixedly installed on the outer surface of the spot welding pipe body, and the heat transfer pipe is connected to the connecting pipe.
[0009] As a preferred embodiment of the present invention, a rotating drum is rotatably mounted on the outer side of the spot welding pipe body, a first gear is fixedly mounted on the outer surface of the rotating drum, a motor is fixedly mounted on the bottom end of the welding frame, a second gear is fixedly mounted on the output end of the motor, and the first gear meshes with the second gear. Multiple feed pipes for indirect, layered feeding are fixedly mounted inside the rotating drum, and the top end of the feed pipes is fed with welding wire through a heat transfer pipe. A through hole communicating with the feed pipe is opened on the surface of the spot welding pipe body located inside the rotating drum.
[0010] As a preferred embodiment of the present invention, the rotating drum is provided with a rotating wire feeding sealing joint at one end near the heat transfer tube. The rotating wire feeding sealing joint includes a fixed end that is fixedly connected to the end of the heat transfer tube, and a rotating end that is fixed to the inner wall of the rotating drum and rotates synchronously with the rotating drum. The fixed end and the rotating end are sealed and connected by a ball bearing and a wear-resistant sealing ring. An annular wire feeding channel is provided inside the rotating end, and the annular wire feeding channel is connected to the top of the feed tube.
[0011] As a preferred embodiment of the present invention, a conductive slip ring is integrated in the coaxial position of the rotary wire feeding sealing joint. The conductive slip ring includes a stator that is insulated from the fixed end and connected to the positive wire of the external welding power supply, and a rotor that is insulated from the rotating end and connected to the rotating drum and the spot-welded pipe body through a copper conductive sheet. The stator and the rotor are electrically connected through a graphite brush.
[0012] As a preferred embodiment of the present invention, a stabilizing mechanism is provided at the top of the base. The stabilizing mechanism includes a placement plate fixedly installed at the top of the base, with the main beam material located at the top of the placement plate. Multiple telescopic rods are fixedly installed at the top of the base, and a long plate is fixedly installed at the top of each telescopic rod. A rigid support block is fixedly installed on the surface of the long plate near the main beam material. The bottom ends of the multiple telescopic rods are connected through an annular pipe, and the annular pipe is connected to a heat outlet pipe through a drainage pipe. The waste heat gas discharged from the heat outlet pipe enters the air cavity of the telescopic rod through the drainage pipe to form a gas pressure support, driving the long plate to press against the bottom surface of the main beam material.
[0013] As a preferred embodiment of the present invention, a main beam material is placed on the top of the base, a support frame is fixedly installed on the top of the base, a hydraulic cylinder is fixedly installed on the top of the support frame, and a movable frame for moving the spot-welded pipe body laterally and longitudinally is provided at the output end of the hydraulic cylinder, and the welding frame is located at the movable end of the movable frame.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] 1. This invention uses an arc-shaped pressure plate and a stabilizing mechanism to precisely limit and fix the main beam, which can effectively limit the bending and twisting deformation caused by welding heat input; at the same time, the pressure plate air groove realizes uniform preheating of the welding area, and the heat inlet pipe and heat outlet pipe maintain stable heat flow circulation, avoiding local overheating or insufficient preheating, greatly reducing welding stress, reducing defects such as weld cracking and surface damage, and improving the mechanical properties and dimensional accuracy of the main beam welded joint.
[0016] 2. This invention uses a rotating drum to drive multiple feed tubes, achieving indirect, layered wire feeding, which, in conjunction with spot welding tubes, completes segmented, multi-layer welding. This design reduces the heat input of a single welding operation, avoids coarse grains and stress spikes in the base material, and ensures weld penetration depth. It effectively resolves the contradiction in traditional continuous welding where "excessive heat input easily damages the base material, while insufficient heat input easily leads to incomplete penetration," thus improving weld quality consistency.
[0017] 3. This invention is equipped with a preheating mechanism, a welding mechanism and a cooling system. Before welding, the heat exchanger outputs heat flow to complete precise preheating. During the welding process, the motor drives the rotating drum to achieve automated wire feeding and welding. After welding, the system switches to cold air output mode to quickly cool the welding area through the air outlet pipe, shortening the process interval time. No additional transportation or equipment replacement is required, which greatly improves the overall efficiency of the main beam welding process.
[0018] 4. This invention uses carbon rods inside the pressure plate to absorb the fumes and odors generated during welding. The sealed gas pipe can close the gap between the pressure plate and the main beam, reducing welding sparks and the escape of harmful gases. At the same time, the rigid support block and telescopic rod of the stabilizing mechanism can buffer welding vibrations, avoid welding deviations caused by main beam offset, reduce the safety risks of manual operation, and improve the working environment of operators.
[0019] 5. This invention relies on hydraulic cylinders and a moving frame to realize the lateral and longitudinal movement of spot-welded pipes. The hydraulic flipping function can adjust the main beam to the optimal welding posture, adapting to the welding needs of bus shelter main beams of different lengths and cross-sectional shapes. At the same time, the magnetic connection structure between the positioning magnetic plate and the support ring facilitates the quick disassembly and assembly of the pressure plate and the adjustment of its position, reducing the difficulty of equipment debugging. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the heat exchanger structure of the present invention; Figure 3 This is a schematic diagram of the welding frame structure of the present invention; Figure 4 This is a schematic diagram of the welded cylinder structure of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the diagram; Figure 6 This is a schematic diagram of the internal structure of the rotating drum of the present invention; Figure 7 This is a schematic diagram of the bottom structure of the pressure plate of the present invention; Figure 8 This is a schematic diagram of the internal structure of the pressure plate of the present invention; Figure 9 This is a schematic diagram of the limiting magnetic plate structure of the present invention; Figure 10 This is a schematic diagram of the rigid support block structure of the present invention.
[0021] In the diagram: 1. Base; 2. Support frame; 3. Hydraulic cylinder; 4. Moving frame; 5. Heating box; 6. Welding frame; 7. Welding mechanism; 71. Welding cylinder; 72. Connecting pipe; 73. Heat transfer pipe; 74. Spot welded pipe body; 75. Rotary drum; 76. First gear; 77. Second gear; 78. Motor; 79. Feed pipe; 710. Through hole; 8. Preheating mechanism; 81. Heat exchanger; 82. Air outlet pipe; 83. Protection. Pipeline; 84. Mounting plate; 85. Heat inlet pipe; 86. Pressure plate; 87. Gas trough; 88. Carbon rod; 89. Fixing magnetic plate; 810. Limiting magnetic plate; 811. Support rod; 812. Support ring; 813. Sealing gas pipe; 814. Heat outlet pipe; 9. Stabilizing mechanism; 91. Placement plate; 92. Long plate; 93. Telescopic rod; 94. Annular pipe; 95. Rigid support block; 96. Drainage pipe; 10. Main beam material. Detailed Implementation
[0022] 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.
[0023] Please see Figure 1-9 This invention provides an adaptive hydraulic tilting and welding device for the main beam of a bus shelter, comprising a base 1, a welding frame 6 disposed at the top of the base 1 near the main beam material 10, a welding mechanism 7 disposed at the output end of the welding frame 6, the welding mechanism 7 comprising a spot welding pipe body 74 disposed at the bottom end of the welding frame 6, a preheating mechanism 8 disposed on the outside of the welding frame 6, the preheating mechanism 8 comprising a heat exchanger 81 fixedly installed on one side of the welding frame 6, the two ends of the heat exchanger 81 being respectively connected to and installed with an inlet heat pipe 85 and an outlet heat pipe. 814, a pressure plate 86 is provided at one end of the spot-welded pipe body 74, and multiple air grooves 87 are opened at the bottom end of the pressure plate 86. The heat inlet pipe 85 and the heat outlet pipe 814 are respectively connected and installed on both sides of the air grooves 87. An elastic sealing air pipe 813 is fixedly installed on the outer surface of the pressure plate 86. The sealing air pipe 813 is connected to the heat inlet pipe 85 through a hose, and a one-way air valve is provided on the sealing air pipe 813. The heat exchanger 81 also has a cold air output end, which is connected to the air grooves 87 of the pressure plate 86 through a control valve.
[0024] The welding mechanism 7 is mounted on the welding frame 6, and the welding cylinder 71 drives the spot welding pipe body 74 to achieve the core welding operation. A preheating mechanism 8 is set on the side of the welding frame 6. The heat exchanger 81 generates heat flow, which is delivered to the air groove 87 of the pressure plate 86 through the heat inlet pipe 85. The pressure plate 86 limits the main beam and preheats the welding area of the main beam at the same time, realizing the integration of welding and preheating functions. This avoids the heat loss caused by traditional separate operations, improves the uniformity of preheating, and reduces welding stress and main beam deformation. The preheated heat flow then flows back to the heat exchanger 81 through the heat outlet pipe 814 to form a closed heat flow cycle, which can maintain the temperature stability of the welding area, avoid excessive local temperature difference that may cause weld cracking, and ensure welding stability. A sealing gas pipe 813 is installed on the outside of the pressure plate 86 and connected to the heat inlet pipe 85 through a hose, allowing some heat flow to enter the sealing gas pipe 813 and expand it to fit tightly against the surface of the main beam material 10, sealing the gap between the pressure plate 86 and the main beam material 10. Sealing the gap can reduce the loss of preheating heat flow, improve preheating efficiency and temperature stability, and further reduce welding deformation. The one-way gas valve design can prevent gas backflow, ensure stable pressure in the sealing gas pipe 813, and maintain the sealing effect.
[0025] In some embodiments, the pressure plate 86 has an internal heat insulation zone, and a plurality of carbon rods 88 for odor adsorption are installed inside the heat insulation zone by means of rigid members.
[0026] Multiple carbon rods 88 are fixed inside the pressure plate 86 by rigid components. The adsorption characteristics of the carbon rods 88 are used to adsorb and treat the fumes and odors generated during the welding process. At the same time, a conical hole is opened at the bottom of the pressure plate 86 to increase the air intake area. This ensures the air flow in the welding area and guides harmful gases to gather towards the carbon rods 88, thereby improving the adsorption efficiency and realizing the in-situ treatment of welding waste gas.
[0027] In some embodiments, a support ring 812 is installed on the outer side of the spot-welded pipe body 74 by screws. Multiple support rods 811 are fixedly installed on the outer surface of the support ring 812 by ball hinges. A limiting magnetic plate 810 is rotatably installed on the free end of the support rod 811. A fixed magnetic plate 89 is correspondingly provided on the top end of the pressure plate 86. Through the cooperation of the ball hinge and the rotatable installation, the limiting magnetic plate 810 can adaptively fit the angle of the fixed magnetic plate 89 to achieve flexible adsorption connection.
[0028] The support ring 812 is fixed to the outside of the spot-welded pipe body 74 by screws. The limiting magnetic plate 810 is rotated and installed by the support rod 811. The magnetic adsorption between the limiting magnetic plate 810 and the magnetic plate 89 fixed at the top of the pressure plate 86 is used to achieve quick positioning connection between the pressure plate 86 and the spot-welded pipe body 74. At the same time, the magnetic connection can flexibly adjust the angle of the pressure plate 86 to ensure that the pressure plate 86 is in close contact with the surface of the main beam, improve the preheating and limiting effect, and adapt to the installation and use of pressure plates 86 of different sizes, thereby realizing the welding of main beam materials 10 of different models.
[0029] In some embodiments, two assembled mounting plates 84 for stabilizing the spot welded pipe body 74 are fixedly installed at the bottom of the welding frame 6, and the spot welded pipe body 74 passes through the middle of the two mounting plates 84. The cold air output end of the heat exchanger 81 is connected to an air outlet pipe 82 for rapidly cooling the welding area. The air outlet pipe 82 is connected to the inside of the mounting plate 84 through a protective pipe 83. The mounting plate 84 is connected to the inside of the pressure plate 86 through a control valve.
[0030] Two modular mounting plates 84 are set at the bottom of the welding frame 6, so that the spot welded pipe body 74 passes through the two mounting plates 84. The clamping action of the mounting plates 84 restricts the shaking and displacement of the spot welded pipe body 74 during the welding process, ensuring welding accuracy. At the same time, the modular structure facilitates the disassembly and maintenance of the mounting plates 84 and adapts to the fixing requirements of spot welded pipe bodies 74 of different specifications. The system utilizes the cold air output end of heat exchanger 81 connected to air outlet duct 82 to deliver cold air through protective pipe 83 to the inside of mounting plate 84. Then, it switches to the inside of pressure plate 86 through control valve to precisely cool the weld area after welding, accurately directionally cooling the weld area, avoiding residual stress caused by uneven natural cooling rate, reducing deformation of main beam material 10, and realizing integrated operation of preheating, welding, and cooling. The control valve flexibly switches between hot and cold air supply; the protective pipe 83 can protect the cold air delivery path and avoid damage from external forces.
[0031] In some embodiments, a welding cylinder 71 is installed at the bottom of the welding frame 6, and a connecting pipe 72 is installed on the outside of the welding cylinder 71 through the heating box 5. A heat transfer pipe 73 is fixedly installed on the outer surface of the spot welding pipe body 74, and the heat transfer pipe 73 is connected to the connecting pipe 72.
[0032] The heat generated by the heating box 5 is transferred to the spot welding pipe body 74 and the welding wire through the connecting pipe 72 and the heat transfer pipe 73, so as to achieve the preheating treatment of the welding wire before welding, improve the fusion effect between the welding wire and the base material, reduce the heat input requirement during welding, avoid overheating of the base material, and reduce the problem of coarse grains.
[0033] In some embodiments, a rotating drum 75 is rotatably mounted on the outside of the spot welding pipe body 74, a first gear 76 is fixedly mounted on the outer surface of the rotating drum 75, a motor 78 is fixedly mounted on the bottom end of the welding frame 6, a second gear 77 is fixedly mounted on the output end of the motor 78, and the first gear 76 meshes with the second gear 77. A plurality of feed pipes 79 for indirect layered feeding are fixedly mounted inside the rotating drum 75, and the top end of the feed pipe 79 is fed with welding wire through a heat transfer pipe 73. A through hole 710 communicating with the feed pipe 79 is opened on the surface of the spot welding pipe body 74 located inside the rotating drum 75.
[0034] In this process, the second gear 77 is driven to rotate by the motor 78, which in turn drives the first gear 76 to rotate. The first gear 76 then drives the rotating drum 75 to rotate. Multiple feed tubes 79 inside the rotating drum 75 rotate with the drum 75 and alternately align with the through holes 710 of the spot welding pipe body 74, thereby achieving intermittent layered wire feeding and forming a segmented multi-layer welding operation mode. Segmented multi-layer welding reduces the heat input of a single welding operation, avoids stress surge caused by overheating of the base material, and ensures the weld penetration depth, balancing welding quality and stress control.
[0035] In some embodiments, the rotating drum 75 is provided with a rotary wire feeding sealing joint at one end near the heat transfer tube 73. The rotary wire feeding sealing joint includes a fixed end that is fixedly connected to the end of the heat transfer tube 73, and a rotating end that is fixed to the inner wall of the rotating drum 75 and rotates synchronously with the rotating drum 75. The fixed end and the rotating end are sealed and connected by a ball bearing and a wear-resistant sealing ring. An annular wire feeding channel is provided inside the rotating end, and the annular wire feeding channel is connected to the top end of the feed tube 79.
[0036] A rotating wire feeding sealing joint is added to one end of the rotating drum 75 near the heat transfer pipe 73, forming a connection structure of "stationary end wire feeding - rotating end wire distribution". The external wire feeding mechanism continuously feeds the welding wire to the heat transfer pipe 73, and guides it through the fixed end of the joint. The fixed end and the rotating end achieve smooth relative rotation through ball bearings. At the same time, the wear-resistant sealing ring seals the gap between the two to prevent the welding wire from deviating or external impurities from entering. The annular wire feeding channel inside the rotating end is kept open to the top of all the feed pipes 79 inside the rotating drum 75. No matter how the motor 78 drives the rotating drum 75 to rotate, the annular channel can always be aligned with at least one feed pipe 79, so that the welding wire can continuously enter the corresponding feed pipe 79 through the channel, and then be accurately fed into the welding pool through the through hole 710 of the spot welding pipe body 74, realizing uninterrupted wire feeding in the rotating state of the rotating drum 75.
[0037] In some embodiments, a conductive slip ring is integrated at the coaxial position of the rotary wire feeding sealing joint. The conductive slip ring includes a stator that is insulated from the fixed end and connected to the positive wire of the external welding power supply, and a rotor that is insulated from the rotating end and connected to the rotating drum 75 and the spot-welded pipe body 74 through copper conductive plates. The stator and the rotor are electrically connected through a graphite brush.
[0038] The stator of the conductive slip ring is insulated from the fixed end of the joint and connected to the positive wire of the external welding power supply to ensure that the stator is always in a static conductive state. The rotor is insulated from the rotating end of the joint and is connected to the rotating drum 75 and the spot welding pipe body 74 through copper conductive plates. It rotates synchronously with the rotating drum 75. The stator and rotor are in close contact through graphite brushes. The welding current is conducted from the stator to the brushes, and then from the brushes to the rotor. Finally, it is conducted to the molten pool through the rotating drum 75 and the spot welding pipe body 74, forming a closed loop with the welding circuit.
[0039] In some embodiments, a stabilizing mechanism 9 is provided at the top of the base 1. The stabilizing mechanism 9 includes a placement plate 91 fixedly installed at the top of the base 1, and the main beam material 10 is located at the top of the placement plate 91. A plurality of telescopic rods 93 are fixedly installed at the top of the base 1. A long plate 92 is fixedly installed at the top of the telescopic rods 93. A rigid support block 95 is fixedly installed on the surface of the long plate 92 near the main beam material 10. The bottom ends of the plurality of telescopic rods 93 are connected through an annular pipe 94. The annular pipe 94 is connected to the heat outlet pipe 814 through a drainage pipe 96. The waste heat gas discharged from the heat outlet pipe 814 enters the air cavity of the telescopic rods 93 through the drainage pipe 96 to form a pneumatic support, driving the long plate 92 to press against the bottom surface of the main beam material 10.
[0040] In this process, air is drawn into the annular pipe 94 through the drainage pipe 96, and the telescopic rod 93 is controlled by air pressure. The telescopic rod 93 moves the long plate 92, while the placement plate 91 supports the main beam material 10. Multiple telescopic rods 93 are used to make the long plate 92 fit against the main beam material 10. The rigid support block 95 on the long plate 92 stabilizes the welding vibration, prevents the main beam material 10 from shifting, avoids weld displacement caused by vibration, and improves welding stability.
[0041] In some embodiments, a main beam material 10 is placed on the top of the base 1, a support frame 2 is fixedly installed on the top of the base 1, a hydraulic cylinder 3 is fixedly installed on the top of the support frame 2, and a movable frame 4 for moving the spot welded pipe body 74 laterally and longitudinally is provided at the output end of the hydraulic cylinder 3, and a welding frame 6 is provided at the movable end of the movable frame 4.
[0042] Among them, the support frame 2 at the top of the base 1 is equipped with a hydraulic cylinder 3. The hydraulic cylinder 3 drives the moving frame 4 to move horizontally and vertically, thereby adjusting the position of the welding frame 6 and the spot welding pipe body 74. This can adapt to the welding of main beams of different lengths and cross-sectional shapes, greatly improving the versatility of the equipment. The heating box 5 coordinates and controls the operation of each mechanism, realizing the all-round position adjustment of the welding mechanism 7, adapting to the welding needs of different areas and postures of the main beam, and improving welding efficiency.
[0043] Working principle: The main beam material 10 is placed on the base 1 as the supporting foundation. The welding mechanism 7 moves in all directions for welding, controlled by the moving frame 4. The welding mechanism 7 is mounted on the welding frame 6, and the welding cylinder 71 drives the spot welding pipe body 74 to achieve the core welding operation. A preheating mechanism 8 is set on the side of the welding frame 6. Heat is generated by the heat exchanger 81 and delivered to the air groove 87 of the pressure plate 86 through the heat inlet pipe 85. The pressure plate 86 limits the main beam and preheats the welding area of the main beam at the same time, realizing the integration of welding and preheating functions, avoiding the heat caused by traditional separate operations. To reduce heat loss, improve preheating uniformity, and reduce welding stress and main beam deformation, a sealing gas pipe 813 is installed on the outside of the pressure plate 86. This pipe is connected to the heat inlet pipe 85 via a flexible hose, allowing some heat flow to enter the sealing gas pipe 813 and expand it to tightly fit the surface of the main beam material 10. This seals the gap between the pressure plate 86 and the main beam material 10, reducing heat loss during preheating, improving preheating efficiency and temperature stability, and further reducing welding deformation. The one-way gas valve design prevents gas backflow, ensuring stable pressure within the sealing gas pipe 813 and maintaining a sealing effect.
[0044] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.
Claims
1. An adaptive hydraulic tilting and welding device for the main beam of a bus shelter, comprising a base (1), characterized in that: A welding frame (6) is provided at the top of the base (1) near the main beam material (10). A welding mechanism (7) is provided at the output end of the welding frame (6). The welding mechanism (7) includes a spot welding pipe body (74) provided at the bottom end of the welding frame (6). A preheating mechanism (8) is provided on the outside of the welding frame (6). The preheating mechanism (8) includes a heat exchanger (81) fixedly installed on one side of the welding frame (6). The two ends of the heat exchanger (81) are respectively connected to an inlet heat pipe (85) and an outlet heat pipe (814). One end of the spot welding pipe body (74) A pressure plate (86) is provided, and multiple air grooves (87) are opened at the bottom end of the pressure plate (86). The heat inlet pipe (85) and the heat outlet pipe (814) are respectively connected and installed on both sides of the air grooves (87). An elastic sealing air pipe (813) is fixedly installed on the outer surface of the pressure plate (86). The sealing air pipe (813) is connected to the heat inlet pipe (85) through a hose, and a one-way air valve is provided on the sealing air pipe (813). The heat exchanger (81) also has a cold air output end, which is connected to the air grooves (87) of the pressure plate (86) through a control valve.
2. The adaptive hydraulic tilting and welding device for the main beam of a bus shelter according to claim 1, characterized in that: The pressure plate (86) has an internal heat insulation zone, and multiple carbon rods (88) connected by rigid components are installed inside the heat insulation zone for absorbing odors.
3. The adaptive hydraulic tilting and welding device for the main beam of a bus shelter according to claim 1, characterized in that: A support ring (812) is installed on the outside of the spot-welded pipe body (74) by screws. Multiple support rods (811) are fixedly installed on the outer surface of the support ring (812) by ball hinges. A limiting magnetic plate (810) is rotatably installed on the free end of the support rod (811). A fixed magnetic plate (89) is correspondingly provided on the top of the pressure plate (86). Through the cooperation of the ball hinge and the rotatable installation, the limiting magnetic plate (810) can adaptively fit the angle of the fixed magnetic plate (89) to achieve flexible adsorption connection.
4. The adaptive hydraulic tilting and welding device for the main beam of a bus shelter according to claim 1, characterized in that: The bottom end of the welding frame (6) is fixedly installed with two assembled mounting plates (84) for stabilizing the spot welded pipe body (74), and the spot welded pipe body (74) passes through the middle of the two mounting plates (84). The cold air output end of the heat exchanger (81) is connected to an air outlet pipe (82) for rapid cooling of the welding area. The air outlet pipe (82) is connected to the inside of the mounting plate (84) through a protective pipe (83). The mounting plate (84) is connected to the inside of the pressure plate (86) through a control valve.
5. The adaptive hydraulic tilting and welding device for the main beam of a bus shelter according to claim 1, characterized in that: The bottom end of the welding frame (6) is equipped with a welding cylinder (71). The outer side of the welding cylinder (71) is connected to the heating box (5) and a connecting pipe (72) is installed. The outer surface of the spot welding pipe body (74) is fixedly equipped with a heat transfer pipe (73), and the heat transfer pipe (73) is connected to the connecting pipe (72).
6. The adaptive hydraulic tilting and welding device for the main beam of a bus shelter according to claim 1, characterized in that: A rotating drum (75) is rotatably mounted on the outside of the spot welding pipe body (74). A first gear (76) is fixedly mounted on the outer surface of the rotating drum (75). A motor (78) is fixedly mounted at the bottom of the welding frame (6). A second gear (77) is fixedly mounted at the output end of the motor (78). The first gear (76) meshes with the second gear (77). Multiple feed pipes (79) for indirect layered feeding are fixedly mounted inside the rotating drum (75). The top of the feed pipe (79) is fed with welding wire through a heat transfer pipe (73). A through hole (710) communicating with the feed pipe (79) is opened on the surface of the spot welding pipe body (74) inside the rotating drum (75).
7. The adaptive hydraulic tilting and welding device for the main beam of a bus shelter according to claim 6, characterized in that: The rotating drum (75) is provided with a rotating wire feeding sealing joint at one end near the heat transfer tube (73). The rotating wire feeding sealing joint includes a fixed end that is fixedly connected to the end of the heat transfer tube (73) and a rotating end that is fixed to the inner wall of the rotating drum (75) and rotates synchronously with the rotating drum (75). The fixed end and the rotating end are sealed and connected by ball bearings and wear-resistant sealing rings. An annular wire feeding channel is provided inside the rotating end, and the annular wire feeding channel is connected to the top of the feed pipe (79).
8. The adaptive hydraulic tilting and welding device for the main beam of a bus shelter according to claim 7, characterized in that: The rotating wire feeding sealing joint is integrated with a conductive slip ring at the coaxial position. The conductive slip ring includes a stator that is insulated from the fixed end and connected to the positive wire of the external welding power supply, and a rotor that is insulated from the rotating end and connected to the rotating drum (75) and the spot-welded pipe body (74) through copper conductive plates. The stator and the rotor are electrically connected through a graphite brush.
9. The adaptive hydraulic tilting and welding device for the main beam of a bus shelter according to claim 1, characterized in that: The base (1) is provided with a stabilizing mechanism (9) at its top. The stabilizing mechanism (9) includes a placement plate (91) fixedly installed at the top of the base (1), and the main beam material (10) is located at the top of the placement plate (91). Multiple telescopic rods (93) are fixedly installed at the top of the base (1). A long plate (92) is fixedly installed at the top of the telescopic rods (93). A rigid support block (95) is fixedly installed on the surface of the long plate (92) near the main beam material (10). The bottom ends of the multiple telescopic rods (93) are connected through an annular pipe (94). The annular pipe (94) is connected to the heat outlet pipe (814) through a drainage pipe (96). The waste heat gas discharged from the heat outlet pipe (814) enters the air cavity of the telescopic rod (93) through the drainage pipe (96) to form a gas pressure support, driving the long plate (92) to press against the bottom surface of the main beam material (10).
10. The adaptive hydraulic tilting and welding device for the main beam of a bus shelter according to claim 1, characterized in that: The main beam material (10) is placed on the top of the base (1), and a support frame (2) is fixedly installed on the top of the base (1). A hydraulic cylinder (3) is fixedly installed on the top of the support frame (2). A moving frame (4) for moving the spot welded pipe body (74) laterally and longitudinally is provided at the output end of the hydraulic cylinder (3). The welding frame (6) is located at the moving end of the moving frame (4).