A mobile welding device for welding a long cylindrical container

Abstract

This utility model discloses a mobile welding device for welding long cylindrical containers, including a welding platform for mounting a welding torch and a horizontal slide bar installed inside the long cylindrical container. The horizontal slide bar is parallel to the axis of the long cylindrical container, and its two ends are supported on the inner wall of the long cylindrical container by expansion mechanisms. The welding platform is connected to a gear and rack gearbox installed on the horizontal slide bar. The expansion mechanism includes several arc-shaped plates attached to the inner wall of the long cylindrical container and a fixed sleeve fitted onto the horizontal slide bar. The arc-shaped plates are evenly arranged along the circumference of the long cylindrical container, and each arc-shaped plate is connected to the fixed sleeve by a telescopic rod. This utility model, by setting expansion mechanisms at both ends of the long cylindrical container, and combining the horizontal slide bar, gear and rack gearbox, and welding platform, achieves support for the horizontal slide bar through two sets of expansion mechanisms, installs the gear and rack gearbox through the horizontal slide bar, and achieves displacement of the welding machine on the welding platform through the gear and rack gearbox.

Description

Technical Field

[0001] This utility model relates to the field of manufacturing liquid hydrogen containers and liquid helium containers, and in particular to a mobile welding device for welding long cylindrical containers. Background Technology

[0002] In the production of cryogenic or ultra-cryocontainers such as liquid hydrogen tanks and liquid helium tanks, the inner cylinder of the main structure is often made of stainless steel, and the cleanliness and mechanical damage requirements of the inner wall of the cylinder in contact with the medium are very high. Some even require overall mirror polishing.

[0003] In actual production, welders need to enter the cylinder to perform welding or repair welding. Because the cylinder has multiple reinforcing rings and is quite long, welders need to move the welding machine inside. This requires at least two people to carry it in simultaneously, which is very strenuous and increases the risk of tripping over the reinforcing rings and cables, causing safety accidents. Furthermore, during welding, the cylinder needs to rotate to weld different positions. When the cylinder rotates, the welding machine is prone to slipping, causing damage to the machine, the inner wall of the cylinder, and posing a significant threat to the safety of the welders. If the welding machine is not moved inside the cylinder, a specially customized extra-long welding torch is required. This is not only very expensive, but the welding parameters also decrease significantly with the extension of the torch, leading to welding quality problems. Moreover, it requires two people working together: one welding inside the cylinder and the other adjusting the welding parameters at the welding machine. The entire process is not only labor-intensive but also inefficient, resulting in poor economic performance for the company. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a mobile welding device for welding long cylindrical containers that is reasonably designed, improves efficiency, economy, reliability and practicality, and addresses the shortcomings of the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mobile welding device for welding long cylindrical containers is characterized in that the device includes a welding platform for mounting a welding torch, a horizontal slide bar disposed inside the long cylindrical container, the two ends of the horizontal slide bar being supported on the inner wall of the long cylindrical container by an expansion mechanism, the welding platform being connected to a gear and rack gearbox disposed on the horizontal slide bar, and the rack of the gear and rack gearbox being fixed on the horizontal slide bar along the axial direction of the horizontal slide bar.

[0007] The expansion mechanism includes several arc-shaped plates attached to the inner wall of the elongated cylindrical container and a fixed sleeve fitted on a horizontal sliding rod. The arc-shaped plates are evenly arranged along the circumference of the elongated cylindrical container, and each arc-shaped plate is connected to the fixed sleeve through a telescopic rod. The curvature of the arc-shaped plate is consistent with the curvature of the elongated cylindrical container.

[0008] The technical problem to be solved by this utility model can also be achieved through the following technical solution: a rotating mechanism is provided on the gear and rack gearbox to facilitate the adjustment of the welding torch position on the welding platform. The rotating mechanism includes a vertically arranged rotating rod, the lower end of which is fixed on the welding platform, and the upper end of which is connected to the output shaft of the gear and rack gearbox through a bearing.

[0009] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the telescopic rod is provided with a fixed rod and a movable rod. One end of the movable rod is fixedly connected to the arc plate. A nut sleeve is provided between the other end of the movable rod and one end of the fixed rod to facilitate the adjustment of the length of the telescopic rod. The end of the movable rod connected to the nut sleeve and the end of the fixed rod connected to the nut sleeve are provided with a screw that cooperates with the nut sleeve. The other end of the fixed rod is fixed on the fixed sleeve.

[0010] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the arc-shaped plate is provided in four pieces and is evenly arranged along the circumference of the long cylindrical container.

[0011] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the device further includes a remote control component for remotely controlling the operation of the gear and rack gearbox. The remote control component includes a PLC controller, a signal receiver, and a handheld remote controller. The handheld remote controller is connected to the PLC controller through the signal receiver. The PLC controller and the signal receiver are installed on the gear and rack gearbox and are connected to the gear and rack gearbox via signal.

[0012] Compared with existing technologies, this utility model provides expansion mechanisms at both ends of a long cylindrical container, combined with a horizontal sliding rod, a gear and rack gearbox, and a welding platform. The horizontal sliding rod is supported by two sets of expansion mechanisms, the gear and rack gearbox is installed on the horizontal sliding rod, and the welding machine on the welding platform is moved according to the welding operator's needs. This allows for the use of cylinders of different diameters, materials, and lengths, thus improving the practicality of the device. Furthermore, this device can be easily operated by one person, is simple to operate, highly efficient, and safe. It can also be automatically controlled by a PLC. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the mobile welding device for welding the long cylindrical container described in this utility model;

[0014] Figure 2 for Figure 1 Side view;

[0015] Figure 3 This is an installation diagram of the welding platform.

[0016] In the diagram: 1-long cylindrical container, 2-horizontal slide bar, 3-gear and rack gearbox, 4-tightening mechanism, 5-rotating rod, 6-welding platform, 7-arc plate, 8-moving rod, 9-fixed rod, 10-nut sleeve, 11-fixed sleeve, 12-rack, 13-gear. Detailed Implementation

[0017] 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.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Reference Figures 1-3 A mobile welding device for welding long cylindrical containers includes a welding platform 6 for mounting a welding torch and a horizontal slide bar 2 disposed inside the long cylindrical container. The horizontal slide bar 2 is arranged parallel to the axis of the long cylindrical container 1. Both ends of the horizontal slide bar 2 are supported on the inner wall of the long cylindrical container 1 by a tensioning mechanism. The welding platform 6 is connected to a gear and rack gearbox 3 disposed on the horizontal slide bar 2. The rack of the gear and rack gearbox 3 is fixed on the horizontal slide bar 2 along the axial direction of the horizontal slide bar 2.

[0020] The expansion mechanism includes several arc-shaped plates 7 attached to the inner wall of the elongated cylindrical container 1 and a fixed sleeve 11 fitted onto the horizontal sliding rod 2. The arc-shaped plates 7 are evenly arranged along the circumference of the elongated cylindrical container 1. Each arc-shaped plate 7 is connected to the fixed sleeve 11 through a telescopic rod. There are four arc-shaped plates 7, which are evenly distributed along the circumference.

[0021] The gear and rack gearbox 3 is provided with a rotating mechanism to facilitate the adjustment of the welding torch position on the welding platform. The rotating mechanism includes a vertically arranged rotating rod 5, the lower end of which is fixed to the welding platform, and the upper end of which is connected to the output shaft of the gear and rack gearbox through a bearing.

[0022] The telescopic rod is provided with a fixed rod 9 and a movable rod 8. One end of the movable rod 8 is fixedly connected to the arc plate. The other end of the movable rod 8 is provided with a nut sleeve between it and one end of the fixed rod 9 to facilitate the adjustment of the length of the telescopic rod. The end of the movable rod 8 connected to the nut sleeve 10 and the end of the fixed rod 9 connected to the nut sleeve 10 are provided with a screw that cooperates with the nut sleeve 10. The other end of the fixed rod 9 is fixed on the fixed sleeve 11.

[0023] The device also includes a remote control component for remotely controlling the operation of the rack and pinion gearbox. The remote control component includes a PLC controller, a signal receiver, and a handheld remote controller. The handheld remote controller is connected to the PLC controller via the signal receiver. The PLC controller and the signal receiver are mounted on the rack and pinion gearbox and are connected to the rack and pinion gearbox via signal. The remote control component adopts any wired or wireless remote control structure that is publicly available or commercially available in the prior art.

[0024] The operation process of the mobile welding device described in this utility model is as follows: place the two sets of expansion mechanisms of this device at both ends of the cylinder and align them, and adjust the screw and nut sleeve for expansion support; then install and fix the horizontal slide bar between the two expansion mechanisms; place the welding machine on the welding platform, operate the handheld remote control to make the welding platform move under the guidance of the gear and rack gearbox, and stop after reaching the desired position; manually rotate the rotating rod to make the welding platform rotate a certain angle to achieve smooth welding.

[0025] During the welding process, the welding platform can be rotated or moved according to real-time needs. Rotation is mainly achieved manually by the operator, while displacement can be achieved remotely via a gear and rack gearbox.

[0026] In addition, the mobile welding device described in this utility model is made of aluminum alloy, which is lightweight, easy to operate, highly efficient and safe. It can also meet the needs of different lengths, specifications and materials. It is quick and convenient to use, highly automated and can be operated by one person.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mobile welding device for welding long cylindrical containers, characterized in that, The device includes a welding platform for mounting a welding torch and a horizontal slide bar disposed inside a long cylindrical container. The two ends of the horizontal slide bar are supported on the inner wall of the long cylindrical container by a tensioning mechanism. The welding platform is connected to a gear and rack gearbox disposed on the horizontal slide bar, and the rack of the gear and rack gearbox is fixed on the horizontal slide bar along the axial direction of the horizontal slide bar. The expansion mechanism includes several arc-shaped plates attached to the inner wall of the elongated cylindrical container and a fixed sleeve fitted on a horizontal sliding rod. The arc-shaped plates are evenly arranged along the circumference of the elongated cylindrical container, and each arc-shaped plate is connected to the fixed sleeve through a telescopic rod.

2. The mobile welding device for welding long cylindrical containers according to claim 1, characterized in that, The gear and rack gearbox is equipped with a rotating mechanism to facilitate the adjustment of the welding torch position on the welding platform. The rotating mechanism includes a vertically arranged rotating rod, the lower end of which is fixed to the welding platform, and the upper end of which is connected to the output shaft of the gear and rack gearbox through a bearing.

3. The mobile welding device for welding long cylindrical containers according to claim 1, characterized in that, The telescopic rod is provided with a fixed rod and a movable rod. One end of the movable rod is fixedly connected to the arc plate. The other end of the movable rod is provided with a nut sleeve between it and one end of the fixed rod to facilitate the adjustment of the length of the telescopic rod. The end of the movable rod connected to the nut sleeve and the end of the fixed rod connected to the nut sleeve are provided with a screw that cooperates with the nut sleeve. The other end of the fixed rod is fixed to the fixed sleeve.

4. The mobile welding device for welding long cylindrical containers according to claim 1, characterized in that, The arc-shaped plate consists of four pieces, which are evenly distributed along the circumference of the long cylindrical container.

5. The mobile welding device for welding long cylindrical containers according to claim 1, characterized in that, The device also includes a remote control component for remotely controlling the operation of the rack and pinion gearbox. The remote control component includes a PLC controller, a signal receiver, and a handheld remote controller. The handheld remote controller is connected to the PLC controller via the signal receiver. The PLC controller and the signal receiver are mounted on the rack and pinion gearbox and are connected to the rack and pinion gearbox via signal.

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