Double-sided welding equipment for longitudinal seam welding of inner tank of LNG (liquefied natural gas) low-temperature storage tank
By designing a double-sided welding equipment for longitudinal joint welding of LNG low-temperature storage tanks, components such as retracting rollers, wire ropes and high-strength connecting thin plates are used to solve the problem of existing equipment requiring a gantry, and a welding effect with a smaller volume, easy transportation and use is achieved.
Patent Information
- Application Number
- CN202421476225.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The existing double-sided welding equipment needs to be equipped with a gantry when used, resulting in a large overall size, inconvenient use and difficult transportation.
A double-sided welding equipment for longitudinal joint welding of LNG low-temperature storage tanks is designed. It adopts components such as top lifting bracket, retracting roller, wire rope, electric telescopic rod and anti-wear roller. The retracting roller is used to drive the bracket to move through the retracting roller, and combines high-strength connection thin plate, adjustment plate and adjustment screw to achieve stable movement and welding of the bracket.
Stable welding can be achieved without a gantry, reducing the overall volume of the device, improving portability and convenience of use, and reducing transportation and use costs.
Smart Images
Figure CN222919883U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of longitudinal seam welding of the inner tank of an LNG cryogenic storage tank, and particularly relates to a double-sided welding device for longitudinal seam welding of the inner tank of an LNG cryogenic storage tank. Background Technique
[0002] As a clean and pollution-free energy source, there are more than 130 LNG receiving stations built (including under construction) globally. The structural form of an LNG cryogenic storage tank is generally a self-supporting dome tank, which belongs to a fully enclosed storage tank. It usually consists of a prestressed concrete outer tank, a carbon steel outer tank lining, and a 9% Ni steel inner tank. Therefore, there is a certain demand for welding the inner tank of an LNG cryogenic storage tank in the market. In order to improve the welding efficiency and welding effect, a double-sided welding device has emerged on the market, which can perform double-sided welding on the longitudinal seams of the inner tank of an LNG cryogenic storage tank;
[0003] However, when the existing double-sided welding device is in use, it usually needs to be equipped with a gantry, which straddles the upper end of the inner tank of the LNG cryogenic storage tank, resulting in a relatively large overall volume of the double-sided welding device during use, making it extremely inconvenient to use and difficult to transport at the same time; Therefore, it does not meet the existing requirements, and for this reason, we have proposed a valve nozzle joint sealing structure. Content of the Utility Model
[0004] The purpose of the utility model is to provide a double-sided welding device for longitudinal seam welding of the inner tank of an LNG cryogenic storage tank, so as to solve the problem that the double-sided welding device usually needs to be equipped with a gantry when in use, which straddles the upper end of the inner tank of the LNG cryogenic storage tank, resulting in a relatively large overall volume of the double-sided welding device during use, making it extremely inconvenient to use and difficult to transport at the same time as mentioned in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A double-sided welding device for longitudinal seam welding of the inner tank of an LNG cryogenic storage tank, including a top lifting bracket:
[0006] A winding roller, which is rotatably installed on both sides of the lower end of the top lifting bracket through bearings. There are two winding rollers. Steel wires are arranged at the front and rear ends of the outside of the two winding rollers. One end of the steel wire is fixedly connected to the winding roller. An outer bracket is arranged on one side below the top lifting bracket, and the outer bracket is fixedly connected to the steel wire. An inner bracket is arranged on the other side below the top lifting bracket, and the inner bracket is fixedly connected to the steel wire. High-strength connecting thin plates are installed inside the upper ends of the outer bracket and the inner bracket through card slots. One end of the high-strength connecting thin plate away from the outer bracket is provided with an adjusting plate, and the adjusting plate is fixedly connected to the high-strength connecting thin plate. Four adjusting lead screws are installed inside the adjusting plate through threads;
[0007] An electric telescopic rod is fixedly installed inside the outer bracket. An anti-wear roller is installed at the telescopic end of the electric telescopic rod, and the anti-wear roller is rotatably connected to the electric telescopic rod.
[0008] Preferably, driving motors are installed on both sides of the front end face of the top lifting bracket. The driving motors are connected to the top lifting bracket by screws, and the rotating parts of the driving motors are fixedly connected to the winding rollers.
[0009] Preferably, a control box is installed on one side of the top lifting bracket, and the control box is fixedly connected to the top lifting bracket.
[0010] Preferably, a welding torch mechanism is installed on the lower end face inside the outer bracket, and the welding torch mechanism is fixedly connected to the outer bracket.
[0011] Preferably, rotating handles are installed at one ends of the four adjusting lead screws, and the rotating handles are welded to the adjusting lead screws.
[0012] Preferably, an installation clamping platform is installed at the lower end of the top lifting bracket, and the installation clamping platform is fixedly connected to the top lifting bracket.
[0013] Preferably, an inner tank of an LNG cryogenic storage tank is arranged inside the installation clamping platform, and the installation clamping platform is connected to the upper end of the inner tank of the LNG cryogenic storage tank through a clamping groove.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0015] 1. The present utility model can wind the steel wire ropes by installing two winding rollers, so that the steel wire ropes drive the inner bracket and the outer bracket to move longitudinally, thereby ensuring the stable welding of the longitudinal seam of the inner tank of the LNG cryogenic storage tank by the device, enhancing the practicability of the device. Installing high-strength connecting thin plates can cooperate with the adjusting plates and adjusting lead screws to pull the inner bracket and the outer bracket, preventing the inner bracket and the outer bracket from shaking laterally, ensuring the stability when the inner bracket and the outer bracket move, enabling the device not to need to cooperate with a gantry, reducing the overall volume of the device, making the device more convenient for transportation and use, and at the same time reducing the cost of the device. Installing the adjusting lead screws can make one end of them abut against the inner bracket, thereby adjusting the position of the inner bracket outside the high-strength connecting thin plate, ensuring that the inner bracket and the outer bracket can closely adhere to the upper end of the inner tank of the LNG cryogenic storage tank;
[0016] 2. By installing electric telescopic rods and anti-wear rollers, the present utility model can prevent the inner bracket and the outer bracket from shaking at the upper end of the inner tank of the LNG cryogenic storage tank during the use of the device, ensuring the stability of the device during operation. Installing the installation platform can facilitate the staff to quickly fix the device at the upper end of the inner tank of the LNG cryogenic storage tank, reducing the installation difficulty of the device, making the device more convenient to use and more user-friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 FIG. is a schematic installation structure diagram of a double-sided welding device for longitudinal seam welding of the inner tank of an LNG cryogenic storage tank according to the present utility model;
[0018] Figure 2 FIG. is a three-dimensional perspective view of a double-sided welding device for longitudinal seam welding of the inner tank of an LNG cryogenic storage tank according to the present utility model;
[0019] Figure 3 FIG. is a connection relationship diagram of the top lifting bracket and the winding roller of the present utility model;
[0020] Figure 4 FIG. is an exploded view of the connection of the high-strength connecting thin plate with the outer bracket and the inner bracket of the present utility model.
[0021] In the figure: 1. Top lifting bracket; 2. Control box; 3. Driving motor; 4. Steel wire rope; 5. Outer bracket; 6. High-strength connecting thin plate; 7. Electric telescopic rod; 8. Anti-wear roller; 9. Welding torch mechanism; 10. Adjusting plate; 11. Adjusting screw rod; 12. Rotating handle; 13. Inner bracket; 14. Installation platform; 15. Winding roller. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0023] Please refer to Figures 1-4 , an embodiment provided by the present utility model: a double-sided welding device for longitudinal seam welding of the inner tank of an LNG cryogenic storage tank, including a top lifting bracket 1:
[0024] The take-up rollers 15 are rotatably mounted on both sides of the lower end of the top lifting bracket 1 through bearings. There are two take-up rollers 15. Installing two take-up rollers 15 can take up the steel wire ropes 4, so that the steel wire ropes 4 drive the inner bracket 13 and the outer bracket 5 to move longitudinally, thereby ensuring that the device stably welds the longitudinal seams of the inner tank of the LNG cryogenic storage tank, enhancing the practicability of the device. Steel wire ropes 4 are arranged at the front and rear ends of the outside of the two take-up rollers 15. One end of the steel wire rope 4 is fixedly connected to the take-up roller 15. An outer bracket 5 is arranged on one side below the top lifting bracket 1, and the outer bracket 5 is fixedly connected to the steel wire rope 4. An inner bracket 13 is arranged on the other side below the top lifting bracket 1, and the inner bracket 13 is fixedly connected to the steel wire rope 4. High-strength connecting thin plates 6 are installed inside the upper ends of the outer bracket 5 and the inner bracket 13 through card slots. Installing the high-strength connecting thin plates 6 can cooperate with the adjusting plate 10 and the adjusting screw rod 11 to hold the inner bracket 13 and the outer bracket 5, preventing the inner bracket 13 and the outer bracket 5 from shaking laterally, ensuring the stability when the inner bracket 13 and the outer bracket 5 move, enabling the device not to need to cooperate with a gantry, reducing the overall volume of the device, making the device more convenient for transportation and use, and at the same time reducing the cost of the device. One end of the high-strength connecting thin plate 6 away from the outer bracket 5 is installed with an adjusting plate 10, and the adjusting plate 10 is fixedly connected to the high-strength connecting thin plate 6. An adjusting screw rod 11 is installed inside the adjusting plate 10 through threads. Installing the adjusting screw rod 11 can make one end of it abut against the inner bracket 13, thereby adjusting the position of the inner bracket 13 outside the high-strength connecting thin plate 6, ensuring that the inner bracket 13 and the outer bracket 5 can closely adhere to the upper end of the inner tank of the LNG cryogenic storage tank. There are four adjusting screw rods 11;
[0025] The electric telescopic rod 7 is fixedly installed inside the outer bracket 5. An anti-wear roller 8 is installed at the telescopic end of the electric telescopic rod 7. Installing the electric telescopic rod 7 and the anti-wear roller 8 can prevent the inner bracket 13 and the outer bracket 5 from shaking at the upper end of the inner tank of the LNG cryogenic storage tank when the device is in use, ensuring the stability during the operation of the device. The anti-wear roller 8 is rotatably connected to the electric telescopic rod 7.
[0026] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, driving motors 3 are installed on both sides of the front end face of the top lifting bracket 1. The driving motors 3 are connected to the top lifting bracket 1 by screws. The rotating part of the driving motor 3 is fixedly connected to the winding roller 15. A control box 2 is installed on one side of the top lifting bracket 1. The control box 2 is fixedly connected to the top lifting bracket 1. A welding torch mechanism 9 is installed on the lower end face inside the outer bracket 5. The welding torch mechanism 9 is fixedly connected to the outer bracket 5. Rotating handles 12 are installed at one end of each of the four adjusting lead screws 11. The rotating handles 12 are welded to the adjusting lead screws 11. An installation clamping platform 14 is installed at the lower end of the top lifting bracket 1. Installing the installation clamping platform 14 can facilitate the staff to quickly fix the device at the upper end of the inner tank of the LNG cryogenic storage tank, reduce the installation difficulty of the device, make the device more convenient to use, make the device more user-friendly. The installation clamping platform 14 is fixedly connected to the top lifting bracket 1. The inner side of the installation clamping platform 14 is provided with the inner tank of the LNG cryogenic storage tank. The installation clamping platform 14 is connected to the upper end of the inner tank of the LNG cryogenic storage tank through a card slot.
[0027] Working principle: When in use, the staff place the top lifting bracket 1 on the upper end of the inner tank of the LNG cryogenic storage tank, so that the installation clamping platform 14 is clamped on the upper end of the inner tank of the LNG cryogenic storage tank, the outer bracket 5 is placed on the outside of the inner tank of the LNG cryogenic storage tank, and the inner bracket 13 is placed on the inside of the inner tank of the LNG cryogenic storage tank. Then, the staff pass the high-strength connecting thin plate 6 through the gap of the inner tank of the LNG cryogenic storage tank, and install the high-strength connecting thin plate 6 inside the upper ends of the inner bracket 13 and the outer bracket 5 through the card slots. Then, the staff turn the adjusting plate 10 so that one end of the adjusting screw rod 11 abuts against the inner bracket 13. At the same time, the electric telescopic rod 7 extends, so that the anti-wear roller 8 is in close contact with the inner tank of the LNG cryogenic storage tank. Then, the welding torch mechanism 9 welds the inner tank of the LNG cryogenic storage tank. At the same time, the driving motor 3 drives the winding roller 15 to wind the steel wire rope 4, so that the inner bracket 13 and the outer bracket 5 move upward, and the welding torch mechanism 9 moves and welds the inner tank of the LNG cryogenic storage tank. When the inner bracket 13 and the outer bracket 5 move to a position more than half of the inner tank of the LNG cryogenic storage tank, the device stops working. The staff remove the device, and place the inner tank of the LNG cryogenic storage tank rotated 180 degrees. Then, the staff repeat the above device installation work, and then weld the remaining part of the inner tank of the LNG cryogenic storage tank. Two winding rollers 15 are installed on this device to wind the steel wire rope 4, so that the steel wire rope 4 drives the inner bracket 13 and the outer bracket 5 to move longitudinally, thereby ensuring that the device stably welds the longitudinal seam of the inner tank of the LNG cryogenic storage tank, enhancing the practicability of the device. Installing the high-strength connecting thin plate 6 can make it cooperate with the adjusting plate 10 and the adjusting screw rod 11 to pull the inner bracket 13 and the outer bracket 5, preventing the inner bracket 13 and the outer bracket 5 from shaking horizontally, ensuring the stability when the inner bracket 13 and the outer bracket 5 move, enabling the device to be used without cooperating with a gantry, reducing the overall volume of the device, making the device more convenient for transportation and use, and at the same time reducing the cost of the device. Installing the adjusting screw rod 11 can make one end of it abut against the inner bracket 13, thereby adjusting the position of the inner bracket 13 outside the high-strength connecting thin plate 6, ensuring that the inner bracket 13 and the outer bracket 5 can closely adhere to the upper end of the inner tank of the LNG cryogenic storage tank. Installing the electric telescopic rod 7 and the anti-wear roller 8 can prevent the inner bracket 13 and the outer bracket 5 from shaking at the upper end of the inner tank of the LNG cryogenic storage tank when the device is in use, ensuring the stability of the device during operation. Installing the installation clamping platform 14 can facilitate the staff to quickly fix this device on the upper end of the inner tank of the LNG cryogenic storage tank, reducing the installation difficulty of the device, making the device more convenient to use, and making the device more user-friendly.
[0028] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.
Claims
1. A double-sided welding device for welding the longitudinal seam of the inner tank of an LNG cryogenic storage tank, comprising a top lifting bracket (1), characterized in that: A winding roller (15) is rotatably mounted on both sides of the lower end of the top lifting bracket (1) through bearings. Two winding rollers (15) are provided. Steel wire ropes (4) are provided at both front and rear ends of the two winding rollers (15). One end of the steel wire rope (4) is fixedly connected to the winding roller (15). An outer bracket (5) is provided on one side below the top lifting bracket (1). The outer bracket (5) is fixedly connected to the steel wire rope (4). An inner bracket (5) is provided on the other side below the top lifting bracket (1). The inner bracket (13) is fixedly connected to the steel wire rope (4), the inner ends of the outer bracket (5) and the inner bracket (13) are both provided with high-strength connecting thin plates (6) through slots, an adjusting plate (10) is provided at one end of the high-strength connecting thin plate (6) away from the outer bracket (5), the adjusting plate (10) is fixedly connected to the high-strength connecting thin plate (6), an adjusting screw rod (11) is provided inside the adjusting plate (10) through threads, and four adjusting screw rods (11) are provided; An electric telescopic rod (7) is fixedly mounted on the inner side of the outer bracket (5); an anti-wear roller (8) is mounted on the telescopic end of the electric telescopic rod (7); and the anti-wear roller (8) is rotatably connected to the electric telescopic rod (7).
2. The double-sided welding equipment for longitudinal seam welding of inner tank of LNG cryogenic storage tank according to claim 1 is characterized in that: A driving motor (3) is installed on both sides of the front end surface of the top lifting bracket (1); the driving motor (3) is connected to the top lifting bracket (1) via screws; and the rotating part of the driving motor (3) is fixedly connected to the winding roller (15).
3. The double-sided welding equipment for longitudinal seam welding of inner tank of LNG cryogenic storage tank according to claim 1 is characterized in that: A control box (2) is installed on one side of the top lifting bracket (1), and the control box (2) is fixedly connected to the top lifting bracket (1).
4. The double-sided welding equipment for longitudinal seam welding of inner tank of LNG cryogenic storage tank according to claim 1 is characterized in that: A welding gun mechanism (9) is installed on the lower end surface of the inner side of the outer bracket (5), and the welding gun mechanism (9) is fixedly connected to the outer bracket (5).
5. The double-sided welding equipment for longitudinal seam welding of inner tank of LNG cryogenic storage tank according to claim 1 is characterized in that: A rotating handle (12) is installed at one end of each of the four adjusting screw rods (11), and the rotating handle (12) is welded to the adjusting screw rod (11).
6. The double-sided welding equipment for longitudinal seam welding of inner tank of LNG cryogenic storage tank according to claim 1 is characterized in that: A mounting bracket (14) is installed at the lower end of the top lifting bracket (1), and the mounting bracket (14) is fixedly connected to the top lifting bracket (1).
7. The double-sided welding equipment for longitudinal seam welding of inner tank of LNG cryogenic storage tank according to claim 6 is characterized in that: An LNG low-temperature storage tank inner tank is arranged on the inner side of the mounting card platform (14), and the mounting card platform (14) is connected to the upper end of the LNG low-temperature storage tank inner tank via a card slot.