A welding machine for double-layer pressure tank

Abstract

This utility model belongs to the technical field of welding machines, and relates to a welding machine for double-layer pressure tanks, comprising: a welding device for welding double-layer pressure tanks, with its welding end facing downwards; an arc-shaped plate on one side of the welding device, with a rotating groove at the bottom, an arc-shaped groove on the front, and a fixed plate fixedly connected to the back; and a rotating motor installed on the back of the fixed plate, with its output end passing through the fixed plate. The rotating motor drives the rotating plate to rotate, and the rotating groove and arc-shaped groove on the arc-shaped plate provide the welding device with an arc-shaped movement trajectory. After the rotating motor starts, it drives the rotating plate to rotate stably within the rotating groove. Under the constraint of the arc-shaped groove, the connecting rod pulls the welding device along a path that corresponds to the arc shape of the bottom of the double-layer pressure tank. This ensures that the welding device maintains an ideal relative position with the part to be welded at the bottom of the tank, thereby enabling comprehensive and uniform welding operations.

Description

Technical Field

[0001] This utility model relates to the technical field of welding machines, and in particular to a welding machine for double-layer pressure tanks. Background Technology

[0002] In many industrial sectors such as chemical, petroleum, and food processing, double-walled pressure tanks play an indispensable role as key storage and reaction equipment. They typically store media with specific pressure and temperature requirements; therefore, the welding quality of the tank directly affects the equipment's sealing performance, strength, and operational safety.

[0003] Chinese Patent Publication No. CN 216350494 U discloses an online monitoring device for leakage of the outer tank of a vertical double-layer cryogenic pressure vessel. The device includes several guide columns erected around the outer tank of the vertical double-layer vessel, a lifting seat ring mounted on the guide columns and movably positioned around the outer tank, a rotary table rotatably mounted on the lifting seat ring, and a magnetic flux leakage (MFL) scanner mounted on the rotary table. The MFL scanner includes a MFL probe fixed to the rotary table and close to the outer surface of the outer tank. The lifting seat ring moves up and down via a transmission screw and a servo-driven geared motor connected to the transmission screw. The rotary table rotates circumferentially via a worm gear transmission mechanism driven by a servo motor. The MFL probe, servo-driven geared motor, and servo motor are connected to a magnetic flux leakage detection control system. This invention enables online monitoring and early warning of defects in the outer tank of a vertical double-layer vessel, offering good safety.

[0004] Currently, traditional welding methods still account for a significant proportion of the welding production of double-walled pressure tanks. Manual welding is one of the more common traditional methods; however, this method is highly dependent on the skill level and experience of the operators. Because the bottom of a double-walled pressure tank is typically arc-shaped, the welding trajectory is complex, making it difficult for manual operation to guarantee the stability of welding speed and quality. Significant skill differences exist between operators, and even the same operator may experience fluctuations in welding quality at different times. This can easily lead to uneven welding, incomplete welds, and other quality problems, seriously affecting the tank's performance and safety. Furthermore, some automated welding equipment has poor adaptability to the tank's position during the welding process. When the tank experiences slight displacement due to placement errors or stress during welding, these devices cannot adjust the welder's position promptly and accurately, resulting in welding deviations and affecting weld quality. Utility Model Content

[0005] The purpose of this invention is to provide a welding machine for double-layer pressure tanks, in order to solve the problem that the complex arc welding trajectory at the bottom of double-layer pressure tanks makes it difficult to ensure the uniformity and integrity of the welding.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A welding machine for a double-walled pressure tank includes a welder for welding a double-walled pressure tank, with the welding end facing downwards.

[0008] The arc-shaped plate has the welding device disposed on one side, with a rotating groove at the bottom, an arc-shaped groove at the front, and a fixing plate fixedly connected to the back.

[0009] A rotating motor is mounted on the back of the fixed plate, with its output end passing through the fixed plate;

[0010] A rotating plate is disposed on the front side of the fixed plate, with the bottom of the back side rotatably connected to the output end of the rotating motor, and the top end disposed inside the rotating groove.

[0011] The connecting rod is connected at one end to the top of the rotating plate and passes through the interior of the arc-shaped groove. The other end is connected to the base of the welder. The output end of the rotating motor rotates to drive the rotating plate to draw an arc. The connecting rod makes the trajectory of the welder arc-shaped so as to weld the bottom of the circular pressure tank.

[0012] As a preferred embodiment of this utility model, uprights are connected to both sides of the bottom end of the arc-shaped plate, a slide rail is connected to the bottom of the uprights, a slider is slidably connected to the top of the slide rail, a reciprocating motor is installed on the back of the slide rail, and a reciprocating lead screw is driven to the output end of the reciprocating motor.

[0013] As a preferred embodiment of this utility model, the slider has a threaded groove in the middle, the reciprocating screw is threaded into the inside of the threaded groove, and the top end of the slider is fixedly connected to the bottom end of the upright.

[0014] As a preferred embodiment of this utility model, the reciprocating motor drives the reciprocating lead screw to rotate, causing the slider to slide back and forth along the slide rail, thereby moving the arc plate and the welder as a whole.

[0015] As a preferred embodiment of this utility model, the size of the rotating groove is adapted to the size of the top of the rotating plate to ensure that the top of the rotating plate rotates stably within the rotating groove.

[0016] As a preferred embodiment of this utility model, the curvature of the arc groove matches the curvature of the part to be welded at the bottom of the double-layer pressure tank, ensuring that the connecting rod drives the welding device to move along a predetermined arc trajectory for welding.

[0017] As a preferred embodiment of this utility model, the slide rail is provided with a limit structure to limit the sliding range of the slider and prevent the slider from sliding off the slide rail.

[0018] The beneficial effects of this utility model are:

[0019] 1. A rotating plate driven by a rotating motor, combined with rotating and arc-shaped grooves on the arc-shaped plate, provides the welder with an arc-shaped motion trajectory. After the rotating motor starts, it drives the rotating plate to rotate stably within the rotating groove. Under the constraint of the arc-shaped groove, the connecting rod pulls the welder along a path that aligns with the arc shape of the bottom of the double-walled pressure tank. This ensures that the welder maintains an ideal relative position with the part to be welded at the bottom of the tank, thus enabling comprehensive and uniform welding operations. Compared to traditional welding methods, this effectively avoids quality problems such as uneven welding and incomplete welds caused by the difficulty in accurately controlling the welding trajectory due to manual operation or ordinary welding equipment. When welding double-walled pressure tanks with extremely high sealing requirements, precise arc welding ensures continuous and uniform welds, greatly enhancing the sealing performance and structural strength of the tank, and providing strong protection for the safety and reliability of the tank in subsequent use.

[0020] 2. The transmission system, comprised of a reciprocating motor, reciprocating lead screw, slider, and slide rail, allows for flexible and precise control of the welder's overall position based on the actual placement of the double-walled pressure tank and the progress requirements during welding. In actual welding operations, when the tank's position shifts or different areas need to be welded, simply controlling the rotation direction and speed of the reciprocating motor causes the reciprocating lead screw to drive the slider along the slide rail via threaded transmission, thus accurately delivering the welder to the target position. This feature significantly enhances the flexibility of welding operations, enabling the welding machine to adapt to various complex welding scenarios and further ensuring the comprehensiveness of the welding process. It guarantees high-quality welding treatment for every part of the tank to be welded, greatly improving the overall welding quality of the double-walled pressure tank. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the welding machine for the double-layer pressure tank of this utility model;

[0022] Figure 2 This is a schematic diagram of the welding machine fixing plate for the double-layer pressure tank body of this utility model;

[0023] Figure 3 This is a schematic diagram of the welding machine slide rail for a double-layer pressure tank according to this utility model;

[0024] Figure 4 This is a schematic diagram of the welding device for a double-layer pressure tank of this utility model.

[0025] Legend:

[0026] 1. Welding device; 2. Curved plate; 3. Fixed plate; 4. Rotating groove; 5. Curved groove; 6. Rotating motor; 7. Rotating plate; 8. Connecting rod; 9. Upright pole; 10. Slide rail; 11. Slider; 12. Threaded groove; 13. Reciprocating lead screw; 14. Reciprocating motor. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Example:

[0029] like Figures 1 to 4 As shown, a welding machine for a double-walled pressure tank includes a welder 1 for welding the double-walled pressure tank, with its welding end facing downwards; an arc-shaped plate 2, on one side of which the welder 1 is located, with a rotating groove 4 at the bottom and an arc-shaped groove 5 on the front, and a fixed plate 3 fixedly connected to the back; a rotating motor 6, mounted on the back of the fixed plate 3, with its output end passing through the fixed plate 3; a rotating plate 7, located on the front of the fixed plate 3, with its bottom back rotatably connected to the output end of the rotating motor 6, and its top end located inside the rotating groove 4; and a connecting rod 8, one end connected to the top end of the rotating plate 7, passing through the arc-shaped groove 5, and the other end connected to the base of the welder 1. The rotation of the output end of the rotating motor 6 drives the rotating plate 7 to draw an arc, and the connecting rod 8 makes the trajectory of the welder 1 arc-shaped, so as to weld the bottom of the circular pressure tank. The welder 1 is responsible for the actual welding operation, with its welding end facing downwards to weld the double-walled pressure tank located below. The rotating groove 4 at the bottom of the arc-shaped plate 2 provides space for the rotation of the top of the rotating plate 7, while the arc-shaped groove 5 on the front is used for the passage and movement of the connecting rod 8. The fixed plate 3 is fixedly connected to the back of the arc-shaped plate 2, providing a mounting position for the rotating motor 6. The rotating motor 6 is mounted on the back of the fixed plate 3, and its output end passes through the fixed plate 3 and is rotatably connected to the bottom of the back of the rotating plate 7. When the rotating motor 6 is started, its output end drives the rotating plate 7 to rotate. Since the top of the rotating plate 7 is placed in the rotating groove 4, and one end of the connecting rod 8 is connected to the top of the rotating plate 7 and passes through the arc-shaped groove 5 to be connected to the base of the welder 1, the rotation of the rotating plate 7 will cause the connecting rod 8 to move along the arc-shaped groove 5, thereby making the movement trajectory of the welder 1 arc-shaped, thus enabling welding of the bottom of the circular pressure tank.

[0030] like Figure 3As shown, uprights 9 are connected to both sides of the bottom of the arc-shaped plate 2. A slide rail 10 is connected to the bottom of the uprights 9, and a slider 11 is slidably connected to the top of the slide rail 10. A reciprocating motor 14 is mounted on the back of the slide rail 10, and a reciprocating lead screw 13 is connected to the output end of the reciprocating motor 14. A threaded groove 12 is formed in the middle of the slider 11, and the reciprocating lead screw 13 is threaded into the inside of the threaded groove 12. The top of the slider 11 is fixedly connected to the bottom of the uprights 9. The reciprocating motor 14 drives the reciprocating lead screw 13 to rotate, causing the slider 11 to slide back and forth along the slide rail 10, thus moving the arc-shaped plate 2 and the welder 1 as a whole. The size of the rotating groove 4 matches the size of the top of the rotating plate 7 to ensure stable rotation of the top of the rotating plate 7 within the rotating groove 4. The curvature of the arc-shaped groove 5 matches the curvature of the part to be welded at the bottom of the double-layer pressure tank, ensuring that the connecting rod 8 drives the welder 1 to move along a predetermined arc trajectory for welding. A limit structure is provided on the slide rail 10 to limit the sliding range of the slider 11 and prevent the slider 11 from sliding off the slide rail 10. A vertical rod 9 is fixedly connected to each side of the bottom end of the arc plate 2, serving to support the arc plate 2. The slide rail 10 is located at the bottom of the vertical rod 9, and the slider 11 is slidably connected to the top of the slide rail 10. A threaded groove 12 in the middle of the slider 11 is threadedly connected to a reciprocating screw 13, which is driven by the output end of the reciprocating motor 14, and the top of the slider 11 is fixedly connected to the bottom end of the vertical rod 9. When the reciprocating motor 14 starts, the reciprocating screw 13 rotates. Due to the threaded connection, the slider 11 slides back and forth along the slide rail 10, thereby driving the arc plate 2 and components such as the welder 1 mounted on the arc plate 2 to move as a whole to meet welding requirements at different positions.

[0031] In summary, before using the welding machine, the double-walled pressure tank should first be stably placed in a suitable working position, ensuring that the part of the tank to be welded is within the working range of the welding machine, and that the tank is firmly fixed to prevent displacement during the welding process. Driven by the connecting rod 8, the welding device 1 moves in an arc shape that matches the bottom arc of the double-walled pressure tank. At this time, the welding end of the welding device 1 is started to weld downwards to the bottom of the double-walled pressure tank. As the connecting rod 8 moves along the arc groove 5, the welding device 1 continues to weld along the preset arc path, ensuring comprehensive and uniform welding of the arc part at the bottom of the tank. During the arc welding process, if it is necessary to adjust the overall position of the welding device 1 according to the specific position of the tank or the welding progress, the reciprocating motor 14 is started. The reciprocating motor 14 is installed on the back of the slide rail 10, and its output end is connected to the reciprocating lead screw 13. After the reciprocating motor 14 is started, its output end drives the reciprocating lead screw 13 to rotate. The slider 11 has a threaded groove 12 in the middle that matches the reciprocating screw 13. Due to the threaded transmission, the slider 11 will reciprocate linearly along the length of the slide rail 10. The top of the slider 11 is fixedly connected to the bottom of the uprights 9 on both sides of the bottom of the arc plate 2. Therefore, the movement of the slider 11 will drive the uprights 9 and the entire upper structure connected above the uprights 9, including the arc plate 2, the fixed plate 3, the rotary motor 6, the rotating plate 7, the connecting rod 8, and the welder 1, to move together. By controlling the rotation direction of the reciprocating motor 14 to be forward or reverse, the movement direction of the slider 11 can be controlled, thereby achieving the horizontal position adjustment of the welder 1. For example, when the welder 1 needs to move in a certain direction, controlling the reciprocating motor 14 to rotate forward will cause the reciprocating screw 13 to drive the slider 11 to slide in the corresponding direction, thereby moving the welder 1 to the target position. Conversely, controlling the reciprocating motor 14 to rotate in reverse will cause the welder 1 to move in the opposite direction.

[0032] All the devices selected in this application are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0033] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A welding machine for double-walled pressure vessels, characterized in that include: Welding device (1) is used to perform welding operations on double-walled pressure tanks, with its welding end facing downwards; The arc plate (2) has the welding device (1) set on one side, with a rotating groove (4) at the bottom, an arc groove (5) at the front, and a fixing plate (3) fixedly connected to the back. A rotating motor (6) is installed on the back of the fixed plate (3), with its output end passing through the fixed plate (3); A rotating plate (7) is disposed on the front side of the fixed plate (3), the bottom of the back side is rotatably connected to the output end of the rotating motor (6), and the top end is disposed inside the rotating groove (4); The connecting rod (8) is connected at one end to the top of the rotating plate (7) and passes through the interior of the arc groove (5). The other end is connected to the base of the welder (1). The output end of the rotating motor (6) rotates to drive the rotating plate (7) to draw an arc. The connecting rod (8) makes the trajectory of the welder (1) arc-shaped so as to weld the bottom of the circular pressure tank.

2. A machine for welding double-walled pressure vessels as claimed in claim 1, characterized in that Both sides of the bottom end of the arc plate (2) are connected to uprights (9), the bottom of the uprights (9) is connected to a slide rail (10), the top of the slide rail (10) is slidably connected to a slider (11), a reciprocating motor (14) is installed on the back of the slide rail (10), and the output end of the reciprocating motor (14) is connected to a reciprocating lead screw (13).

3. A machine for welding double-walled pressure vessels as claimed in claim 2, characterized in that The slider (11) has a threaded groove (12) in the middle, and the reciprocating screw (13) is threaded into the inside of the threaded groove (12). The top of the slider (11) is fixedly connected to the bottom of the upright (9).

4. A machine for welding double-walled pressure vessels as claimed in claim 3, characterized in that The reciprocating motor (14) drives the reciprocating lead screw (13) to rotate, causing the slider (11) to slide back and forth along the slide rail (10), thereby moving the arc plate (2) and the welder (1) as a whole.

5. The double seam machine for welding a can body as set forth in claim 1, wherein The dimensions of the rotating groove (4) are adapted to the dimensions of the top of the rotating plate (7) to ensure that the top of the rotating plate (7) rotates stably within the rotating groove (4).

6. A machine for welding double-walled pressure vessels as claimed in claim 5, characterized in that The curvature of the arc groove (5) matches the curvature of the part to be welded at the bottom of the double-layer pressure tank, ensuring that the connecting rod (8) drives the welding device (1) to move along the predetermined arc trajectory for welding.

7. A machine for welding double-walled pressure vessels as claimed in claim 2, characterized in that The slide rail (10) is provided with a limit structure to limit the sliding range of the slider (11) and prevent the slider (11) from sliding out of the slide rail (10).

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