Welding device for narrow space of steel structure block

Abstract

A welding device for a narrow space of a steel structure block relates to the technical field of welding devices and comprises a rotary adjusting seat, a lifting adjusting seat is rotatably mounted at the upper end of the rotary adjusting seat, a motor for driving the lifting adjusting seat to rotate is arranged in the rotary adjusting seat, and a displacement adjusting seat is arranged at the front end of the lifting adjusting seat. A supporting piece is arranged at the front end of the displacement adjusting seat, an electric push rod is fixedly installed in the supporting piece, an angle adjusting seat is fixedly installed at the movable end of the electric push rod, a mounting frame is fixedly arranged on an output shaft of a motor arranged in the angle adjusting seat, and a welding head is installed in the mounting frame through a rotating shaft. And a motor for controlling the inclination angle adjustment of the welding head is arranged on the side face of the mounting frame, a control box is fixedly mounted below the rear end of the lifting adjusting seat, a base is mounted below the rotating adjusting seat, and the problem that the welding device is difficult to weld the steel structure block in a narrow space is solved.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, specifically a welding device for use in confined spaces in steel structure sections. Background Technology

[0002] The steel structure section welding device is used to connect steel structure sections. It consists of a welding power source, welding torch, wire feeding mechanism, control system, and auxiliary devices. The welding power source provides energy, the welding torch performs welding, the wire feeding mechanism delivers the material, the control system regulates parameters, speed, and sequence, and the auxiliary devices fix and adjust the position of the workpiece. Some devices are also equipped with protective devices to ensure personnel safety.

[0003] For example, the Chinese authorized patent CN213702131U, entitled "A Rapid Welding Robotic Arm for Pipes," includes a base, a fixing ring, a first rocker arm, a second rocker arm, a third rocker arm, and a fourth rocker arm. The fixing ring is located on the upper right of the base, while the first, second, third, and fourth rocker arms are all located on the upper left of the base. A support is fixed on the right side of the upper surface of the base. The fixing ring can fix the two pipes to be welded separately, which helps to improve the stability and welding quality during welding. The fourth rocker arm can rotate freely through a motor, a transmission gear, a first bevel gear, a second bevel gear, a third bevel gear, a first connecting rod, a cylinder, a slide rod, and a second connecting rod, which facilitates changing the position of the welding torch.

[0004] While the aforementioned existing technologies can be applied to the welding of steel structure sections, in confined spaces, multi-axis robotic arms are prone to collisions due to volume changes during adjustment. Furthermore, multi-axis robotic arms rely on programming in confined spaces, resulting in a large workload for relevant personnel, and cannot be operated manually. Therefore, they do not meet current needs. To address this, we propose a welding device for steel structure sections in confined spaces. Utility Model Content

[0005] The purpose of this invention is to provide a welding device for steel structure sections in confined spaces, in order to solve the problem mentioned in the background art that welding devices are difficult to use in confined spaces for welding steel structure sections.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a welding device for narrow spaces in steel structure sections, comprising a rotary adjustment seat, a lifting adjustment seat, and a displacement adjustment seat forming a three-dimensional spatial adjustment system. The rotary adjustment seat has a built-in drive motor that can flexibly rotate the lifting adjustment seat horizontally. The lifting and displacement adjustment seats are equipped with unique screw-slider adjustment mechanisms; a servo motor drives the screw to rotate, and the screw drive and slider guide achieve height adjustment of the lifting adjustment seat and lateral movement of the displacement adjustment seat. Furthermore, an electric push rod within the support member can push the angle adjustment seat, which, in conjunction with the motors within the angle adjustment seat and mounting frame, allows for lateral and longitudinal tilt adjustment of the welding head, ensuring that the welding head can be aligned with the complex weld seam in the optimal position.

[0007] To enable remote control and safe operation, the device integrates a visualization and early warning system. The camera at the front of the mounting frame collects images of the welding area in real time and transmits them to the operating terminal via the wireless communication module in the control box, allowing operators to clearly observe the welding situation remotely. The lidar on both sides of the lifting adjustment seat continuously monitors the surrounding environment. Once it detects that the distance to an obstacle is approaching the safety threshold, it sends an early warning signal to the operating terminal through the control box, effectively avoiding the risk of collision.

[0008] Addressing the unique operational requirements of working in confined spaces within steel structure sections, the device comprises two complementary bases. The adsorption-type base is equipped with soft magnets and magnetic components at its bottom. Adjusting the handle changes the direction of the magnetic poles, allowing for flexible control of the adsorption force and ensuring the device firmly adheres to the steel structure surface. The movable base utilizes a combination of drive wheels powered by hub motors and driven omnidirectional wheels, enabling flexible movement and precise positioning within confined spaces to meet the needs of various operational scenarios. The welding head is connected to the welding machine body via a wiring harness, ensuring stable transmission of welding energy and signals. The entire device operates collaboratively, providing efficient and reliable conditions for welding steel structure sections in confined spaces.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. The adjustment mechanism of this utility model adjusts the welding head within a fixed range of motion. Compared to multi-axis robotic arms, this significantly reduces the risk of collisions caused by volume changes during adjustment when operating in confined spaces, ensuring safe welding operations in complex environments. Secondly, its adjustment method relies on an internal sliding drive component. A servo motor drives a screw to rotate, which, in conjunction with the slider and adjustment cavity, displaces the connecting end component. This avoids the reliance on complex programming required by multi-axis robotic arms in confined spaces, greatly reducing the workload of personnel. Furthermore, the position of the welding component can be flexibly controlled through rotating the adjustment seat, controlling the lifting adjustment seat, and adjusting the displacement adjustment seat. The welding head can also be adjusted laterally and longitudinally using the internal motor of the angle adjustment seat and the side motor of the mounting bracket, enhancing the flexibility and precision of the welding process.

[0011] 2. This utility model features a camera mounted on the upper part of the mounting frame. The camera captures images of the area corresponding to the welding head. The control box integrates an image transmission module and the core control unit of the welding device. The images captured by the camera are encoded by the image transmission module within the control box and transmitted to the operating terminal via a wireless network. The operating terminal decodes the images and displays them in real time, allowing operators to easily view the positions of the weld, welding head, and workpiece. Operators issue commands based on the images, which are transmitted to the control box via the network module. After parsing the commands, the core unit of the control box controls the motors of each adjustment mechanism. Through remote operation, without complex programming, the welding device can be adjusted at any time on the operating terminal according to the actual welding conditions, such as the specific direction of the weld and the complex shape of the workpiece.

[0012] 3. This utility model, by installing lidar on both sides of the lifting and adjusting seat, can monitor the environment over a large area around the welding device in real time. It accurately calculates the distance between the target object and itself by emitting a laser beam and measuring the time of reflected light. During the welding process, it can acquire real-time distance information between the welding device and surrounding steel structure components and obstacles. When the lidar detects that the distance between the welding device and surrounding objects is close to a set safety threshold, it transmits alarm information to the operating terminal in real time via a wireless communication module. Operators can receive these warning messages promptly on the operating terminal and take preventative measures.

[0013] 4. This utility model allows for the selection of a suitable base based on actual working conditions. The adsorption-type chassis enables the welding device to be firmly adsorbed onto the steel structure surface, making it suitable for complex vertical surfaces, inverted surfaces, and other unconventional welding positions in confined spaces. This prevents the device from shifting. By adjusting the handle, the relative direction of the magnetic poles of the two sets of oppositely polarized magnetic bodies in the magnetic adsorption assembly can be changed, allowing for precise control of the adsorption force. The adsorption force can be lowered during preparation for easy movement, increased during welding to ensure stability, and then lowered again after completion for easy disassembly. This ensures stability, improves operational convenience, and prevents damage to the workpiece surface. The movable chassis is equipped with drive wheels driven by hub motors on both sides and driven casters at the front and rear of the bottom, improving the mobility of the welding device and enabling it to quickly move through confined spaces and bypass obstacles, thus improving maneuverability and work efficiency. Simultaneously, the movement trajectory and stopping position can be precisely controlled, reducing operational errors and ensuring accurate welding positions. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 3 This is a top view of the present invention;

[0017] Figure 4 This is a perspective view of Embodiment 2 of the present invention.

[0018] In the diagram: 1. Rotary adjustment seat; 2. Lifting adjustment seat; 3. Displacement adjustment seat; 4. Support component; 5. Electric push rod; 6. Angle adjustment seat; 7. Mounting bracket; 8. Welding head; 9. Fixing bracket; 10. Camera; 11. Base; 12. Adsorption chassis; 13. Adjustment handle; 14. Control box; 15. LiDAR; 16. Adjustment cavity; 17. Screw; 18. Slider; 19. Servo motor; 20. Movable chassis; 21. Drive wheel; 22. Driven caster wheel. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please see Figure 1-4An embodiment of this utility model provides a welding device for a narrow space in a steel structure section, including a rotary adjustment seat 1, a lifting adjustment seat 2 rotatably mounted on the upper end of the rotary adjustment seat 1, and a motor for driving the lifting adjustment seat 2 to rotate built into the rotary adjustment seat 1. A displacement adjustment seat 3 is provided at the front end of the lifting adjustment seat 2, and a support member 4 is provided at the front end of the displacement adjustment seat 3. An electric push rod 5 is fixedly installed inside the support member 4. An angle adjustment seat 6 is fixedly installed at the movable end of the electric push rod 5. An output shaft of a motor built into the angle adjustment seat 6 is fixedly mounted on a mounting frame 7. A welding head 8 is mounted inside the mounting frame 7 through a rotating shaft, and a motor for controlling the tilt angle adjustment of the welding head 8 is provided on the side of the mounting frame 7. One end of the welding head 8 is connected to the welding machine body through a wire harness. A control box 14 is fixedly installed below the rear end of the lifting adjustment seat 2, and a base 11 is installed below the rotary adjustment seat 1.

[0021] After the operating terminal issues a command, the control box 14 receives and processes the signal, controlling the motor inside the rotary adjustment seat 1 to rotate, driving the lifting adjustment seat 2 to rotate horizontally. The lifting adjustment seat 2 and the displacement adjustment seat 3 work together, combined with the operation of the electric push rod 5, the angle adjustment seat 6, and the side motor of the mounting bracket 7, to achieve position adjustment and posture changes of the welding head 8 in three-dimensional space. The welding machine body transmits electrical energy and control signals to the welding head 8 via a wiring harness, causing it to generate a welding arc for operation. This multi-level structural design gives the welding head 8 a wide range of freedom of movement, allowing it to penetrate into various corners of the narrow space of the steel structure section, flexibly adjust to the optimal welding position and angle, precisely align with complex and varied weld seams, effectively ensuring welding quality and solving the problem of traditional equipment struggling to achieve precise welding in confined spaces.

[0022] Please see Figure 2 and Figure 3 The lifting adjustment seat 2 and the displacement adjustment seat 3 are equipped with adjustment mechanisms. The adjustment mechanism includes an adjustment cavity 16 built into the lifting adjustment seat 2 and the displacement adjustment seat 3. A screw 17 is rotatably installed inside the adjustment cavity 16. A slider 18 is installed on the outside of the screw 17 through a threaded engagement. The slider 18 slides and is limited to the adjustment cavity 16. A servo motor 19 is installed at one end of each screw 17. The slider 18 inside the lifting adjustment seat 2 is fixed to the back of the displacement adjustment seat 3. The slider 18 inside the displacement adjustment seat 3 is fixed to the back of the support member 4.

[0023] When the position of the welding head 8 needs to be adjusted, the control box 14 controls the servo motor 19 to start. The servo motor 19 drives the screw 17 to rotate. Since the slider 18 is threadedly engaged with the screw 17 and is guided by the adjustment cavity 16, the slider 18 will move along the axial direction of the screw 17 within the adjustment cavity 16. The movement of the slider 18 in the lifting adjustment seat 2 drives the displacement adjustment seat 3 to achieve height adjustment. The movement of the slider 18 in the displacement adjustment seat 3 drives the support 4 and the welding head 8 to achieve lateral adjustment. The adjustment mechanism adjusts the welding head within a fixed range of motion. Compared with a multi-axis robotic arm, this greatly reduces the risk of collision caused by volume changes during adjustment when working in confined spaces.

[0024] Please see Figure 1 A fixing frame 9 is welded to the front side of the top of the mounting frame 7. A camera 10 is installed at the front end of the fixing frame 9. The camera 10 captures images of the welding position between the welding head 8 and the steel structure. The output of the camera 10 is connected to the control box 14. The control box 14 has a built-in wireless communication module, which sends the image information to the operation terminal.

[0025] Camera 10 continuously captures images of the welding area, converting light signals into electrical signals, which are then processed internally to form digital image data. This data is transmitted to control box 14, where a wireless communication module processes the data and transmits the image information to the operating terminal via wireless signal. The operating terminal receives the signal and displays the image on its screen. This enables remote visual monitoring of the welding process, allowing operators to monitor the welding status in real time from a safe area without being in a confined, harsh, or even dangerous welding environment.

[0026] Please see Figure 1 Both sides of the lifting and adjusting seat 2 are equipped with lidar 15. The output of the lidar 15 is connected to the control box 14, and the control box 14 sends a warning signal to the operating terminal via a wireless communication module. The lidar 15 continuously emits laser beams into the surrounding environment. The laser beams reflect back after encountering objects. The lidar 15 calculates its distance from surrounding objects based on the time difference between emitting and receiving the laser beams. When the distance to an obstacle is detected to be close to a preset safety threshold, the lidar 15 transmits the data signal to the control box 14. After analysis and judgment, the control box 14 sends a warning signal to the operating terminal via the wireless communication module to remind the operator to take measures.

[0027] Example 1:

[0028] Please see Figure 1 , Figure 2 and Figure 3The base 11 includes an adsorption base 12 with a soft magnet at the bottom. An adjustment handle 13 is rotatably mounted on the front end of the adsorption base 12. The adsorption base 12 has a magnetic attraction component inside, and the magnetic attraction component includes two sets of magnetic bodies with opposite polarities. One end of the adjustment handle 13 is limited to the magnetic attraction component, and the relative direction of the magnetic poles of the magnetic bodies is changed by adjusting the handle 13 to adjust the adsorption force.

[0029] In practical applications, when welding operations need to be performed within a confined space within a steel structure section, such as when welding on a vertical steel wall, the operator first brings the adsorption base 12 close to the steel structure surface. By rotating the adjusting handle 13, the relative orientation of the magnetic poles of the magnet is changed, causing the soft magnet at the bottom of the adsorption base 12 to generate a suitable adsorption force, firmly attaching the welding device to the steel structure surface. At this time, the welding device remains stable, preventing displacement due to gravity or operational vibration. After the welding operation is completed, the adjusting handle is rotated again to reduce the adsorption force, facilitating the operator to disassemble the welding device and move it to the next work position.

[0030] Example 2:

[0031] Please see Figure 4 The base 11 also includes a movable chassis 20. Drive wheels 21 are mounted on both sides of the movable chassis 20, and these drive wheels 21 are driven by hub motors. Driven casters 22 are mounted at the front and rear of the bottom of the movable chassis 20. When welding operations are performed within the confined space of the steel structure section, if the welding device needs to be moved, the operator sends a movement command through the operating terminal. After receiving the command, the control box 14 controls the hub motors to drive the drive wheels 21 to rotate. In conjunction with the driven casters 22, this allows the welding device to move flexibly forward, backward, and turn within confined spaces. For example, it can navigate through narrow passages within the steel structure section or bypass obstacles to reach the target welding position, achieving precise positioning and greatly improving the mobility and operational efficiency of the welding device in complex spatial environments.

[0032] Working Principle: During use, the operator sends commands through the operating terminal. After receiving the commands, the control box 14 controls the motors in the rotary adjustment seat 1, lifting adjustment seat 2, and displacement adjustment seat 3 to adjust the position of the welding head 8 in different directions. The electric push rod 5, angle adjustment seat 6, and the motors on the side of the mounting bracket 7 work together to adjust the posture of the welding head 8 so that it is accurately aligned with the weld. The camera 10 collects images of the welding area in real time and transmits them to the operating terminal via the wireless communication module in the control box 14, allowing the operator to remotely monitor the welding process. At the same time, the lidar 15 monitors the surrounding environment in real time. If a dangerous situation is detected, a signal is fed back to the control box 14, which sends a warning signal to the operating terminal via the wireless communication module, allowing the operator to take timely measures to avoid collisions. Depending on the actual operation requirements, if the adsorption chassis 12 of Embodiment 1 is selected, the adsorption force can be adjusted by adjusting the handle 13 to make the welding device firmly adsorbed on the steel structure surface; if the movable chassis 20 of Embodiment 2 is selected, the hub motor drives the drive wheel 21 and cooperates with the driven universal wheel 22 to realize the flexible movement and positioning of the welding device in a confined space.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A welding device for steel structure section narrow space, comprising a rotary adjusting seat (1), characterized in that: The upper end of the rotary adjusting seat (1) is rotatably installed with a lifting adjusting seat (2), and the rotary adjusting seat (1) is internally provided with a motor for driving the lifting adjusting seat (2) to rotate, the front end of the lifting adjusting seat (2) is provided with a displacement adjusting seat (3), the front end of the displacement adjusting seat (3) is provided with a support (4), the inside of the support (4) is fixedly installed with an electric push rod (5), the movable end of the electric push rod (5) is fixedly installed with an angle adjusting seat (6), the output shaft of the motor in the angle adjusting seat (6) is fixedly provided with a mounting rack (7), the inside of the mounting rack (7) is rotatably installed with a welding head (8), and the side of the mounting rack (7) is provided with a motor for controlling the inclination angle of the welding head (8), the lower end of the lifting adjusting seat (2) is fixedly installed with a control box (14), and the lower end of the rotary adjusting seat (1) is installed with a base (11).

2. The welding device for steel structure section narrow space according to claim 1, characterized in that: The lifting adjusting seat (2) and the displacement adjusting seat (3) are provided with an adjusting mechanism, the adjusting mechanism comprises an adjusting cavity (16) internally provided in the lifting adjusting seat (2) and the displacement adjusting seat (3), the inside of the adjusting cavity (16) is rotatably installed with a screw rod (17), the outside of the screw rod (17) is threadedly and matchingly installed with a sliding block (18), the sliding block (18) is slidingly limited with the adjusting cavity (16), one end of the screw rod (17) is installed with a servo motor (19), the sliding block (18) in the lifting adjusting seat (2) is fixed with the back of the displacement adjusting seat (3), and the sliding block (18) in the displacement adjusting seat (3) is fixed with the back of the support (4).

3. The welding device for steel structure section narrow space according to claim 1, characterized in that: The front side of the top end of the mounting rack (7) is welded with a fixing frame (9), the front end of the fixing frame (9) is installed with a camera (10), the camera (10) collects images of the welding position of the welding head (8) and the steel structure, and the output end of the camera (10) is connected to the control box (14), the control box (14) is internally provided with a wireless communication module, and image information is sent to an operation terminal through the wireless communication module.

4. The welding device for steel structure section narrow space according to claim 3, characterized in that: The two sides of the lifting adjusting seat (2) are both installed with a laser radar (15), the output end of the laser radar (15) is connected to the control box (14), and the control box (14) sends an early warning signal to an operation terminal through a wireless communication module.

5. The welding device for steel structure section narrow space according to claim 1, characterized in that: One end of the welding head (8) is connected to a welding machine body through a wire harness.

6. The welding device for steel structure section narrow space according to claim 1, characterized in that: The base (11) comprises a suction type bottom disc (12) provided with a soft magnet at the bottom, the front end of the suction type bottom disc (12) is rotatably installed with an adjusting handle (13), the inside of the suction type bottom disc (12) is provided with a magnetic attraction assembly, the magnetic attraction assembly comprises two groups of magnetic bodies with opposite polarities, one end of the adjusting handle (13) is limited with the magnetic attraction assembly, and the magnetic pole opposite direction of the magnetic body is changed through the adjusting handle (13) to adjust the suction strength.

7. The welding device for steel structure section narrow space according to claim 1, characterized in that: The base (11) further comprises a movable bottom disc (20), the two sides of the movable bottom disc (20) are installed with drive wheels (21), and the drive wheels (21) are driven by hub motors, and the front and rear of the bottom of the movable bottom disc (20) are installed with driven universal wheels (22).

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