Dome net rack welding fixing device

Abstract

The application discloses a dome net rack welding fixing device, which comprises a base fixing device and a support rod positioning device; the base fixing device comprises a base clamping device and a base lifting device, and a first angle rotating device arranged below the base lifting device, and the first angle rotating device is provided with a distance control device connected with the support rod positioning device; the support rod positioning device comprises a support rod clamping device and an arc guide frame, and a support rod lifting support rotatably connected with the arc guide frame, the support rod lifting support is connected with the distance control device, a second angle rotating device is arranged between the arc guide frame and the support rod clamping device, a third angle rotating device is arranged between the arc guide frame and the support rod lifting support, and the arc guide frame is provided with a center positioning device. The application can significantly improve the positioning precision, ensure the accurate butt joint of each component of the net rack, effectively improve the construction efficiency, reduce the labor intensity, and provide a powerful guarantee for the high-quality construction of large dome net rack structures.

Description

Technical Field

[0001] This invention relates to the field of dome construction technology, and in particular to a welding and fixing device for dome grid structures. Background Technology

[0002] In the field of steel structure construction, especially in the installation of large dome-shaped space frame structures, positioning accuracy has always been a key factor affecting project quality and construction efficiency. Traditional positioning methods mainly rely on manual measurement and simple mechanical auxiliary tools. This approach often falls short of achieving high-precision positioning when dealing with complex three-dimensional spatial structures. With the increasing scale and complexity of building designs, the limitations of traditional positioning methods become increasingly apparent, becoming a bottleneck restricting construction quality and efficiency.

[0003] Specifically, traditional positioning methods have several shortcomings when dealing with complex structures like dome-shaped space frames. Firstly, manual measurement is easily affected by the skill level and experience of the operators, leading to significant measurement errors, especially at high altitudes or in complex environments where these errors are more difficult to control. Secondly, simple mechanical fixing tools lack flexibility and automatic adjustment capabilities, making it difficult to adapt to space frame components of different shapes and sizes, resulting in inaccurate positioning and consequently affecting welding quality and the overall stability of the space frame structure. For example, in the dome-shaped space frame welding scenario mentioned in the patent document with publication number CN217949790U, if traditional positioning methods are used, it will be difficult to ensure precise alignment between the space frame supports and the base, easily leading to welding position deviations and even structural safety hazards.

[0004] To address the aforementioned problems, this invention aims to provide a novel welding and fixing device for dome space frames. This invention not only significantly improves positioning accuracy and ensures accurate docking of various components of the space frame, but also effectively enhances construction efficiency and reduces labor intensity, providing a strong guarantee for the high-quality construction of large dome space frame structures. It is expected to significantly improve the construction quality of dome space frames and achieve reasonable control of project costs. Summary of the Invention

[0005] The present invention aims to solve the problem of insufficient accuracy of traditional positioning methods in the prior art.

[0006] To address the above problems, the present invention provides a welding and fixing device for a dome space frame. The dome space frame includes a space frame base and space frame supports, comprising:

[0007] Support rod positioning device for base fixing device and sliding connection base fixing device;

[0008] The base fixing device includes a base clamping device for clamping the space frame base and a base lifting device fixedly installed below the base clamping device, as well as a first angle rotating device installed below the base lifting device. The first angle rotating device is equipped with a distance control device connected to the support rod positioning device.

[0009] The support rod positioning device includes a support rod clamping device for clamping the support rods of the space frame, an arc-shaped guide frame that slides to connect the support rod clamping device, and a support rod lifting bracket that rotates to connect the arc-shaped guide frame. The support rod lifting bracket is connected to a distance control device. A second angle rotation device is provided between the arc-shaped guide frame and the support rod clamping device, and a third angle rotation device is provided between the arc-shaped guide frame and the support rod lifting bracket. The arc-shaped guide frame is provided with a center positioning device.

[0010] Preferably, the first angle rotation device includes an angle rotation base fixedly installed below the base lifting device and an angle rotation arm rotatably connected to the angle rotation base. An angle rotation motor is provided between the angle rotation base and the angle rotation arm, and a distance control device is provided on the angle rotation arm.

[0011] Preferably, a sliding groove is provided on the angle rotating arm, and the distance control device includes a distance control threaded rod provided in the sliding groove and a distance control motor for driving the distance control threaded rod. The support rod lifting bracket is provided with a distance control block corresponding to the distance control threaded rod, and the distance control block is provided with a distance control threaded hole corresponding to the distance control threaded rod.

[0012] The support rod positioning device forms a sliding connection with the base fixing device through the distance control threaded rod, distance control motor and distance control block.

[0013] Preferably, an arc groove is provided on one side of the arc guide frame, and an arc tooth is provided on one side of the arc groove. One end of the support rod clamping device is provided with a gear sliding device corresponding to the arc tooth. The gear sliding device includes a sliding gear corresponding to the arc tooth and a rotary gear motor that drives the sliding gear to rotate. The rotary gear motor is fixedly connected to the support rod clamping device.

[0014] The support rod clamping device is slidably connected to the arc guide frame through an arc sliding tooth, a sliding gear, and a rotary tooth motor.

[0015] Preferably, a second angle rotation device is provided between the support rod clamping device and the gear sliding device. The second angle rotation device includes an angle adjusting seat fixedly connected to the gear sliding device and an angle adjusting arm rotatably connected to the angle adjusting seat, as well as an angle adjusting motor that drives the angle adjusting seat and the angle adjusting arm to rotate relative to each other.

[0016] Preferably, a limit block is provided on the rotary gear motor, and a limit groove corresponding to the limit block is opened in the arc slide groove. The support rod clamping device is positioned on the arc guide frame through the limit block and the limit groove.

[0017] Preferably, the arc guide frame is arc-shaped, and the center positioning device includes a center positioning rod set on the arc guide frame. One end of the center positioning rod is fixedly connected to the arc guide frame, and the other end of the center positioning rod extends toward the center of the arc guide frame and is provided with a negative pressure positioning device.

[0018] Preferably, the third angle rotation device is located at one end of the support rod lifting bracket connected to the arc guide frame, and the support rod lifting bracket is rotatably connected to the arc guide frame through the third angle rotation device.

[0019] Preferably, a visible opening is provided on one side of the arc guide frame, and an indicator light passing through the visible opening is fixedly installed on the gear sliding device.

[0020] The beneficial effects of this invention are as follows:

[0021] In this invention, the base clamping device in the base fixing device can stably clamp the space frame base, the base lifting device can adjust the height of the base, and the first angle rotation device can realize the rotation adjustment of the base at a certain angle in the horizontal direction, so that the space frame base can be accurately positioned and fixed, providing a stable foundation for the subsequent installation of space frame supports.

[0022] The support rod positioning device achieves flexible positioning of the support rod through various structures. The arc guide frame allows the support rod clamping device to move along the arc trajectory. Combined with the second angle rotation device, the support rod can be adjusted at multiple angles in three-dimensional space. The support rod lifting bracket can adjust the height of the support rod, and the distance control device can precisely control the distance between the support rod positioning device and the base fixing device, ensuring that the space frame support rod can be accurately aligned with the space frame base, improving welding quality and the stability of the overall space frame structure. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0024] In the attached image:

[0025] Figure 1 A schematic diagram of the welding and fixing device for the dome space frame and the dome space frame itself. Figure 1 ;

[0026] Figure 2 A schematic diagram of the welding and fixing device for the dome space frame and the dome space frame itself. Figure 2 ;

[0027] Figure 3 Schematic diagram of the welding and fixing device for the dome space frame Figure 1 ;

[0028] Figure 4 Schematic diagram of the welding and fixing device for the dome space frame Figure 2 ;

[0029] Figure 5 This is a sectional view of the circular arc guide frame;

[0030] Figure 6 for Figure 5 Enlarged diagram of point A in the middle.

[0031] In the diagram: 1. Dome truss; 11. truss base; 12. truss support rod; 2. Base fixing device; 21. Base clamping device; 22. Base lifting device; 23. First angle rotation device; 231. Angle rotation base; 232. Angle rotation arm; 2321. Sliding groove; 24. Distance control device; 241. Distance control threaded rod; 243. Distance control block; 244. Distance control threaded hole; 3. Support rod positioning device; 31. Support rod clamping device; 311. Gear sliding device; 3111, Sliding gear; 3112, Rotary gear motor; 3113, Limiting block; 3114, Indicator light; 32, Arc guide frame; 321, Arc slide groove; 322, Arc slide tooth; 323, Limiting groove; 324, Visible opening; 33, Support rod lifting bracket; 34, Second angle rotation device; 341, Angle adjustment seat; 342, Angle adjustment arm; 35, Third angle rotation device; 36, Center positioning device; 361, Center positioning rod; 362, Negative pressure positioning device. Detailed Implementation

[0032] The technical solution of the present invention will now be described with reference to the accompanying drawings. However, the described embodiments are only some embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1 to 6 As shown, the present invention provides a welding and fixing device for a dome space frame. The dome space frame 1 includes a space frame base 11 and a space frame support rod 12, and includes a base fixing device 2 and a support rod positioning device 3 that slides to connect the base fixing device 2.

[0034] The base fixing device 2 includes a base clamping device 21 for clamping the grid base 11 and a base lifting device 22 fixedly installed below the base clamping device 21, as well as a first angle rotating device 23 installed below the base lifting device 22. The first angle rotating device 23 is provided with a distance control device 24 connected to the support rod positioning device 3.

[0035] The support rod positioning device 3 includes a support rod clamping device 31 for clamping the support rod 12 of the grid frame, an arc guide frame 32 that is slidably connected to the support rod clamping device 31, and a support rod lifting bracket 33 that is rotatably connected to the arc guide frame 32. The support rod lifting bracket 33 is connected to a distance control device 24. A second angle rotation device 34 is provided between the arc guide frame 32 and the support rod clamping device 31. A third angle rotation device 35 is provided between the arc guide frame 32 and the support rod lifting bracket 33. The arc guide frame 32 is provided with a center positioning device 36.

[0036] In this embodiment, the base clamping device 21 adopts an openable and closable hydraulic clamping structure, consisting of multiple clamping arms. Each clamping arm has a highly elastic rubber pad installed on its inner side, and the surface of the rubber pad has anti-slip textures to increase friction with the grid base 11 and prevent slippage. The clamping arms are driven by a hydraulic cylinder to achieve the opening and closing action. The hydraulic cylinder is installed on the outer side of the clamping arm and connected to a hydraulic pump station via hydraulic lines.

[0037] The base clamping device 21 directly clamps the space frame base 11, providing a stable fixing force for the base and ensuring that the base will not be displaced or shaken due to external forces during the welding process, thus providing a reliable foundation for subsequent welding operations.

[0038] Specifically, the high-elasticity rubber pads and anti-slip textures can effectively increase friction and prevent the base from sliding; the clamping force of the hydraulic clamps can be precisely controlled, adapting to space frame bases 11 of different sizes and weights, reducing welding errors caused by base movement, and improving welding accuracy and quality.

[0039] In some embodiments, a position sensor is provided at the opening and closing point of the clamping arm to detect the degree of opening and closing of the clamping arm and feed the signal back to the control system so as to accurately control the clamping force.

[0040] In this embodiment, the base lifting device 22 is an electric screw lifting mechanism, mainly composed of a motor, a screw, a nut, and a guide rod. The motor is a servo motor, characterized by high precision and fast response, and is installed at the bottom of the lifting mechanism. The screw is vertically arranged and connected to the motor's output shaft via a coupling. The nut is fixed to the lifting platform, and the guide rod is arranged parallel to the screw to guide the smooth lifting of the platform.

[0041] Specifically, the base lifting device 22 adjusts the height of the base clamping device 21 to position the space frame base 11 at a suitable height, facilitating welding and connection with the space frame support rod 12. Simultaneously, the leveling device ensures the base's levelness during lifting, meeting welding requirements for different height scenarios.

[0042] Among them, the servo motor driven screw lifting mechanism can achieve precise height adjustment, and the lifting speed is adjustable, which can quickly and accurately adjust the base to the required height; the level adjustment device can correct the tilt of the lifting platform in time to ensure the verticality and horizontality of the welding.

[0043] In some embodiments, a leveling device, including a level and a fine-tuning bolt, is provided on the lifting platform to adjust the levelness of the lifting platform and ensure that the base clamping device 21 remains level during the lifting process.

[0044] In this embodiment, the support rod clamping device 31 adopts an openable and closable clamping structure. For the circular space frame support rod 12, a semi-circular clamping groove is provided on the inner side of the clamping arm, and a wear-resistant rubber sleeve is inlaid on the inner surface of the clamping groove. The rubber sleeve is provided with a groove that adapts to the surface of the support rod to increase the stability of the clamping. The clamping arms are opened and closed by a bolt structure, and the distance between the clamping arms is adapted to space frame support rods 12 of different diameters by means of the bolt structure.

[0045] Among them, the support rod clamping device 31 clamps the space frame support rod 12 to ensure that the support rod remains stable during the welding process and prevents it from shifting or shaking. Together with the base clamping device 21, it ensures the welding quality.

[0046] Specifically, the wear-resistant rubber sleeve and groove design can increase the friction with the support rod and improve the stability of clamping; the pressure sensor can monitor the clamping pressure in real time to ensure that the clamping force is appropriate, reduce welding deviation caused by the movement of the support rod, and improve the strength and aesthetics of the weld.

[0047] In some embodiments, a pressure sensor is provided on the clamping arm to detect the clamping pressure and feed the signal back to the control system to prevent excessive clamping pressure from damaging the support rod or insufficient clamping pressure from causing the support rod to loosen.

[0048] Specifically, the support rod lifting bracket 33 adopts a frame structure, which is welded from high-strength aluminum alloy profiles and features light weight and high strength. One end of the bracket is connected to the control block 243 to achieve a sliding connection with the base fixing device 2; the other end is connected to the arc guide frame 32 through a hydraulic lifting structure, enabling the bracket to raise and lower the arc guide frame 32.

[0049] Under the action of the distance control device 24, the support rod lifting bracket 33 adjusts the height of the support rod clamping device 31 to ensure that the grid support rod 12 and the grid base 11 are accurately aligned in the vertical direction. In conjunction with the base lifting device 22, it achieves all-round position adjustment.

[0050] like Figures 1 to 3As shown, in this embodiment, the first angle rotation device 23 includes an angle rotation base 231 fixedly disposed below the base lifting device 22 and an angle rotation arm 232 rotatably connected to the angle rotation base 231. An angle rotation motor (not shown in the figure) is disposed between the angle rotation base 231 and the angle rotation arm 232, and a distance control device 24 is disposed on the angle rotation arm 232.

[0051] Specifically, the first angle rotating device 23 uses a rectangular base made of high-strength alloy steel, with a precision-machined surface to ensure a smooth and flat connection with the base lifting device 22. The base has multiple mounting holes and is securely connected to the base lifting device 22 via bolts. In some embodiments, reinforcing ribs are provided on the sides of the base to enhance its structural strength and stability.

[0052] In this embodiment, the angle rotating arm 232 is a long strip-shaped metal arm, one end of which is rotatably connected to the angle rotating base 231 via a high-precision bearing, allowing it to rotate 360° horizontally around a fixed axis. The other end of the rotating arm is provided with an interface for mounting the distance control device 24, and the interface is precision-machined to ensure the connection accuracy with the distance control device 24.

[0053] The angle rotation motor is a high-precision servo motor, installed between the angle rotation base 231 and the angle rotation arm 232. The motor is connected to the angle rotation arm 232 through a gear transmission mechanism. The gear transmission ratio is precisely calculated to achieve precise angle control of the angle rotation arm 232. An encoder is installed on the motor to provide real-time feedback of the rotation angle information of the angle rotation arm 232 to the control system.

[0054] In this embodiment, the first angle rotation device 23 enables the horizontal angle adjustment of the base fixing device 2, allowing the space frame base 11 to connect with the space frame support rod 12 at different angles, meeting the welding requirements of complex dome structures. The combination of a high-precision servo motor and gear transmission mechanism achieves precise angle control, with an angle adjustment accuracy of ±0.1°. The encoder provides real-time angle feedback, promptly correcting angle deviations to ensure the accuracy of the welding angle and reduce welding deformation.

[0055] like Figures 1 to 3 As shown, in this embodiment, a sliding groove 2321 is provided on the angle rotating arm 232. The distance control device 24 includes a distance control threaded rod 241 disposed in the sliding groove 2321 and a distance control motor (not shown in the figure) that drives the distance control threaded rod 241. The support rod lifting bracket 33 is provided with a distance control block 243 corresponding to the distance control threaded rod 241. The distance control block 243 is provided with a distance control threaded hole 244 corresponding to the distance control threaded rod 241.

[0056] The support rod positioning device 3 is slidably connected to the base fixing device 2 through the distance control threaded rod 241, the distance control motor and the distance control block 243.

[0057] Specifically, a sliding groove 2321 is formed on the angle rotating arm 232 to provide sliding space for the distance-controlling threaded rod 241. Its shape is elongated, and its dimensions are designed according to the specifications of the distance-controlling threaded rod 241. The distance-controlling threaded rod 241 is set in the sliding groove 2321, with one end connected to the distance-controlling motor and the other end engaging with the distance-controlling block 243 on the support rod lifting bracket 33. The threaded rod has high thread precision to ensure accurate distance control. The distance-controlling motor drives the distance-controlling threaded rod 241 to rotate, and through the thread transmission principle, the distance-controlling block 243 moves along the threaded rod, thereby adjusting the distance between the support rod positioning device 3 and the base fixing device 2. The motor is also a servo motor to ensure control accuracy. The distance-controlling block 243 is set on the support rod lifting bracket 33, which has a distance-controlling threaded hole 244 corresponding to the distance-controlling threaded rod 241, and engages with the distance-controlling threaded rod 241 to achieve a sliding connection.

[0058] The distance control device 24 precisely controls the distance between the support rod positioning device 3 and the base fixing device 2, enabling the space frame support rod 12 to be accurately aligned with the welding position on the space frame base 11, ensuring the accuracy and quality of the welding. Through high-precision distance control, the distance control device 24 can quickly and accurately position the support rod to the appropriate position, reducing the time and error of manual adjustments and improving welding efficiency and quality.

[0059] like Figures 3 to 6 As shown, in this embodiment, an arc groove 321 is provided on one side of the arc guide frame 32, and an arc tooth 322 is provided on one side of the arc groove 321. One end of the support rod clamping device 31 is provided with a gear sliding device 311 corresponding to the arc tooth 322. The gear sliding device 311 includes a sliding gear 3111 corresponding to the arc tooth 322 and a rotary gear motor 3112 that drives the sliding gear 3111 to rotate. The rotary gear motor 3112 is fixedly connected to the support rod clamping device 31. The support rod clamping device 31 is slidably connected to the arc guide frame 32 through the arc tooth 322, the sliding gear 3111 and the rotary gear motor 3112.

[0060] Specifically, the arc guide 32 is designed in an arc shape, with its radius precisely determined according to the design requirements of the dome frame 1. An arc groove 321 is provided on one side of the arc guide 32. The width and depth of the groove are carefully designed to ensure smooth sliding of the gear sliding device 311. An arc sliding tooth 322 is provided on one side of the arc groove 321. The tooth shape and spacing of the sliding tooth adopt an involute tooth shape design according to the transmission requirements to improve the smoothness and accuracy of the transmission.

[0061] In this embodiment, the arc guide 32 provides a sliding track in the arc direction for the support rod clamping device 31, allowing the support rod clamping device 31 to move along the arc guide 32, thereby adjusting the position of the space frame support rod 12 in the arc direction and meeting the welding requirements of the arc structure of the dome space frame 1. The involute tooth-shaped arc sliding teeth 322 and the carefully designed arc sliding groove 321 ensure the smooth and accurate sliding of the gear sliding device 311, reducing transmission errors; the end cap and buffer device protect the equipment, extend its service life, ensure the positional accuracy of the space frame support rod 12 in the arc direction, and improve the welding quality.

[0062] In some embodiments, the arc guide 32 is provided with end caps at both ends, and the end caps are provided with buffer devices to reduce the impact force of the gear sliding device 311 when it slides to the end, thereby protecting the equipment.

[0063] Specifically, the sliding gear 3111 corresponds to the circular arc sliding tooth 322 design and is made of high-strength alloy steel. Its tooth profile and module match those of the circular arc sliding tooth 322 to ensure smooth and accurate meshing transmission. The gear surface is hardened to improve its hardness and wear resistance.

[0064] The rotary gear motor 3112 is fixedly connected to the support rod clamping device 31. A stepper motor is selected, featuring high positioning accuracy and stable operation. The motor is connected to the sliding gear 3111 via a reducer. The reduction ratio of the reducer is designed according to transmission requirements to reduce the speed of the sliding gear 3111 and improve transmission smoothness. A driver is installed on the motor to receive commands from the control system, achieving precise sliding control.

[0065] The gear sliding device 311 converts the rotational motion of the gear motor 3112 into the arc sliding motion of the support rod clamping device 31 on the arc guide frame 32, thereby realizing the position adjustment of the grid support rod 12 in the arc direction. The combination of the stepper motor and reducer enables precise sliding control with a sliding accuracy of ±0.01mm; the driver can respond quickly to the instructions of the control system, enabling rapid and accurate movement of the support rod clamping device 31, improving the accuracy and efficiency of position adjustment.

[0066] like Figures 3 to 6 As shown, in this embodiment, a second angle rotation device 34 is provided between the support rod clamping device 31 and the gear sliding device 311. The second angle rotation device 34 includes an angle adjusting seat 341 fixedly connected to the gear sliding device 311 and an angle adjusting arm 342 rotatably connected to the angle adjusting seat 341, as well as an angle adjusting motor (not shown in the figure) that drives the angle adjusting seat 341 and the angle adjusting arm 342 to rotate relative to each other. The angle adjusting arm 342 is fixedly connected to the support rod clamping device 31.

[0067] Specifically, the angle adjusting seat 341 is fixedly connected to the gear sliding device 311, and is made of high-strength metal material with a rectangular shape. The angle adjusting seat 341 is provided with a shaft hole for mounting the angle adjusting arm 342, and a high-precision bearing is installed in the shaft hole to ensure that the angle adjusting arm 342 can rotate smoothly.

[0068] Specifically, the angle adjusting arm 342 is rotatably connected to the angle adjusting seat 341 and can rotate around a fixed axis within a certain angle range, the rotation range of which is designed according to actual needs. The other end of the angle adjusting arm 342 is connected to the support rod clamping device 31. By adjusting the angle of the angle adjusting arm 342, the angle of the support rod clamping device 31 in the vertical direction can be adjusted.

[0069] Specifically, a high-precision servo motor is selected for the angle adjustment motor and is mounted on the angle adjustment base 341. The motor is connected to the angle adjustment arm 342 through a gear transmission mechanism. The gear transmission ratio is precisely calculated to achieve precise angle control of the angle adjustment arm 342. An encoder is installed on the motor to provide real-time feedback of the rotation angle information of the angle adjustment arm 342 to the control system.

[0070] In this embodiment, the second angle rotation device 34 adjusts the angle of the support rod clamping device 31 in the vertical direction, enabling the space frame support rod 12 to be welded to the space frame base 11 at different angles, meeting the welding requirements of complex dome structures. The combination of a high-precision servo motor and gear transmission mechanism enables precise angle control, with an angle adjustment accuracy of ±0.1°; the encoder provides real-time angle feedback, which can promptly correct angle deviations, ensuring the accuracy of the welding angle and reducing welding deformation.

[0071] In this embodiment, the third angle rotation device 35 is disposed at one end of the support rod lifting bracket 33 connected to the arc guide frame 32, and the support rod lifting bracket 33 is rotatably connected to the arc guide frame 32 through the third angle rotation device 35. The working principle of the third angle rotation device 35 is the same as that of the second angle rotation device 34.

[0072] like Figure 6 As shown, in this embodiment, a limiting block 3113 is provided on the rotary gear motor 3112, and a limiting groove 323 corresponding to the limiting block 3113 is provided in the arc slide groove 321. The support rod clamping device 31 is positioned on the arc guide frame 32 by the limiting block 3113 and the limiting groove 323.

[0073] Specifically, the limiting block 3113 is mounted on the rotary gear motor 3112, made of high-strength metal, and circular in shape. The dimensions of the limiting block 3113 are determined according to the design of the limiting groove 323 to ensure accurate embedding within it. The limiting groove 323 is formed in the arc-shaped sliding groove 321 and cooperates with the limiting block 3113 to limit the sliding range of the support rod clamping device 31 on the arc-shaped guide frame 32, preventing it from exceeding its designed stroke.

[0074] In this embodiment, the limiting block 3113 and the limiting groove 323 position and limit the sliding position of the support rod clamping device 31, ensuring that it moves within a safe and reasonable range and avoiding equipment damage or welding accidents caused by excessive movement. The cooperation between the limiting block 3113 and the limiting groove 323 can accurately limit the sliding range of the support rod clamping device 31.

[0075] In some embodiments, buffer springs are provided at both ends of the limiting groove 323 to reduce the impact force when the limiting block 3113 collides with the end of the limiting groove 323. The buffer springs can reduce the impact force of the collision, effectively ensure the movement safety of the support rod clamping device 31, and improve the reliability and stability of the device.

[0076] like Figure 4 As shown, in this embodiment, the center positioning device 36 includes a center positioning rod 361 disposed on the arc guide frame 32. One end of the center positioning rod 361 is fixedly connected to the arc guide frame 32, and the other end of the center positioning rod 361 extends toward the center of the arc guide frame 32 and is provided with a negative pressure positioning device 362.

[0077] Specifically, one end of the center positioning rod 361 is fixedly connected to the arc guide frame 32 and is made of high-strength metal material, while the other end extends towards the center of the arc guide frame 32. Its length is precisely determined according to the radius of the arc guide frame 32 and the positioning requirements. The surface of the positioning rod is polished to improve its accuracy and wear resistance.

[0078] Specifically, the negative pressure positioning device 362 is located at the other end of the central positioning rod 361 and adopts a vacuum suction cup structure. The vacuum suction cup is made of rubber material, which has good flexibility and sealing performance. The suction cup is connected to a vacuum pump through a vacuum pipeline. When the vacuum pump is working, a negative pressure is generated inside the suction cup, which adheres to the center position of the dome frame 1 or other fixed reference points. A pressure sensor is installed on the vacuum pipeline to detect the negative pressure value inside the suction cup and feed the signal back to the control system to ensure stable and reliable suction force.

[0079] In this embodiment, the center positioning device 36 provides a center positioning reference for the arc guide 32, ensuring the accurate installation position of the arc guide 32. This allows the support rod clamping device 31 to move along the correct arc trajectory, ensuring the welding position accuracy of the space frame support rod 12. The vacuum suction cup structure provides stable suction force, ensuring the accurate positioning of the arc guide 32; the pressure sensor can monitor the negative pressure value in real time, ensuring the stability of the suction force. Through precise center positioning, the positioning accuracy of the entire device can be improved, welding errors can be reduced, and welding quality can be improved.

[0080] like Figure 4 As shown, in this embodiment, a visible opening 324 is provided on one side of the arc guide frame 32, and an indicator light 3114 passing through the visible opening 324 is fixedly provided on the gear sliding device 311.

[0081] Specifically, the visible opening 324 functionally achieves "visual penetration," which can be used for manual observation of the internal gear meshing status, lubrication conditions, etc., and can also provide a light path for the indicator light 3114. The shape and size of the opening must match the outer contour of the indicator light 3114, while avoiding weakening the strength of the guide structure; reinforcing ribs should be added if necessary.

[0082] Indicator lights 3114 (such as LEDs) can display the real-time operating status of the sliding device (such as running, stopped, or malfunctioning), for example, by encoding different status information through color changes (red / green / yellow) or flashing frequency. In precision equipment, indicator lights 3114 can assist operators in quickly locating the position of the sliding device (such as extreme positions or zero points), or be used for visual alignment during calibration. In hazardous areas (such as near high temperatures, high pressures, or moving parts), indicator lights 3114 can serve as safety warnings, reminding personnel to maintain a safe distance or the operating status of the equipment.

[0083] The present invention provides a welding and fixing device for a dome grid structure, the working principle of which is as follows:

[0084] The base fixing device clamps the grid base with the base clamping device, the base lifting device adjusts the height of the base, and the first angle rotation device realizes the horizontal rotation of the base, ensuring the stability of the base and the adjustable angle.

[0085] The support rod positioning device slides along the arc guide frame through the support rod clamping device, the second angle rotation device adjusts the vertical angle of the support rod, the third angle rotation device controls the tilt of the support rod lifting bracket, and the distance control device adjusts the straight distance between the support rod and the base to achieve precise docking of the support rod.

[0086] The center positioning device connects to the negative pressure positioning device via the center positioning rod to adsorb the reference point of the dome's center, ensuring the accuracy of the arc guide frame installation benchmark.

[0087] This invention has many applications, including but not limited to the following described scenarios:

[0088] The dome structure of sports stadiums is typically large in scale and complex in structure, requiring extremely high welding precision and overall stability. This dome structure welding and fixing device can accurately position and fix the base and supports of the structure, ensuring accurate alignment of all components. This meets the high-quality construction requirements of large sports stadium dome structures and guarantees the safety and performance of the venue.

[0089] As a crucial transportation hub, the airport terminal's dome structure requires not only sufficient strength and stability but also stringent requirements for appearance and precision. The automation and precise positioning capabilities of this device help improve construction efficiency and quality, ensuring the aesthetics and safety of the terminal's dome structure and meeting the demands of large-scale passenger and cargo traffic at the airport.

[0090] Convention and exhibition centers frequently host various large-scale exhibitions, requiring flexible spatial layouts and reliable structural support for their dome-shaped space frames. This device allows for easy adjustment of the position and angle of the space frame supports to adapt to different exhibition layouts while ensuring the stability of the space frame structure, thus guaranteeing the smooth operation of convention and exhibition activities.

[0091] In some industrial plants, large dome structures are used to meet specific production processes or space requirements. This welding and fixing device can efficiently and accurately complete the welding and installation of the dome space frame, improving the efficiency and quality of plant construction and ensuring the normal use and production safety of the plant.

Claims

1. A welding and fixing device for a dome space frame, the dome space frame comprising a space frame base and space frame supports, characterized in that, Includes a base fixing device and a support rod positioning device for a sliding connection base fixing device; The base fixing device includes a base clamping device for clamping the grid base and a base lifting device fixedly installed below the base clamping device, as well as a first angle rotating device installed below the base lifting device. The first angle rotating device is equipped with a distance control device connected to the support rod positioning device. The support rod positioning device includes a support rod clamping device for clamping the support rod of the space frame and an arc guide frame that is slidably connected to the support rod clamping device, as well as a support rod lifting bracket that is rotatably connected to the arc guide frame. The support rod lifting bracket is connected to a distance control device. A second angle rotation device is provided between the arc guide frame and the support rod clamping device, and a third angle rotation device is provided between the arc guide frame and the support rod lifting bracket. The arc guide frame is provided with a center positioning device. The circular arc guide frame is provided with a circular arc groove on one side, and a circular arc sliding tooth is provided on one side of the circular arc groove. One end of the support rod clamping device is provided with a gear sliding device corresponding to the circular arc sliding tooth. The gear sliding device includes a sliding gear corresponding to the circular arc sliding tooth and a rotary gear motor that drives the sliding gear to rotate. The rotary gear motor is fixedly connected to the support rod clamping device. The support rod clamping device is slidably connected to the circular arc guide frame through the circular arc sliding tooth, the sliding gear and the rotary gear motor. Among them, a second angle rotation device is provided between the support rod clamping device and the gear sliding device. The second angle rotation device includes an angle adjustment seat fixedly connected to the gear sliding device and an angle adjustment arm rotatably connected to the angle adjustment seat, as well as an angle adjustment motor that drives the angle adjustment seat and the angle adjustment arm to rotate relative to each other. The angle adjustment arm is fixedly connected to the support rod clamping device. Among them, a limit block is set on the rotary gear motor, and a limit groove corresponding to the limit block is opened in the arc slide groove. The support rod clamping device is positioned on the arc guide frame through the limit block and the limit groove.

2. The dome grid welding and fixing device according to claim 1, characterized in that, The first angle rotation device includes an angle rotation base fixedly installed below the base lifting device and an angle rotation arm rotatably connected to the angle rotation base. An angle rotation motor is installed between the angle rotation base and the angle rotation arm, and a distance control device is installed on the angle rotation arm.

3. The dome grid welding and fixing device according to claim 2, characterized in that, A sliding groove is provided on the angle rotating arm. The distance control device includes a distance control threaded rod and a distance control motor that drives the distance control threaded rod, and the support rod lifting bracket is provided with a distance control block corresponding to the distance control threaded rod. The distance control block is provided with a distance control threaded hole corresponding to the distance control threaded rod. The support rod positioning device forms a sliding connection with the base fixing device through the distance control threaded rod, distance control motor and distance control block.

4. The dome grid welding and fixing device according to claim 1, characterized in that, The arc guide frame is designed in an arc shape. The center positioning device includes a center positioning rod set on the arc guide frame. One end of the center positioning rod is fixedly connected to the arc guide frame, and the other end of the center positioning rod extends toward the center of the arc guide frame and is equipped with a negative pressure positioning device.

5. The dome grid welding and fixing device according to claim 1, characterized in that, The third-angle rotation device is installed at one end of the support rod lifting bracket connected to the arc guide frame. The support rod lifting bracket is rotatably connected to the arc guide frame through the third-angle rotation device.

6. The dome grid welding and fixing device according to claim 1, characterized in that, A visible opening is provided on one side of the arc guide frame, and an indicator light passing through the visible opening is fixedly installed on the gear sliding device.

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