Butt joint device for butt welding of 9Ni steel

Abstract

The application relates to the technical field of welding equipment, and discloses a butt joint device for butt joint welding of 9Ni steel, which comprises a base plate, a mounting groove is arranged in the center of the upper end surface of the base plate, positioning grooves are arranged on the upper end surface of the base plate and located on both sides of the mounting groove, support pipes are arranged at the two ends of the upper end surface of the base plate through the positioning grooves, support columns are slidably arranged in the two support pipes, a few-shaped supporting rod is arranged at the upper end of each support column, rotating bases are rotatably arranged at the two ends of the two few-shaped supporting rods, and U-shaped placement tables are arranged at the upper end surfaces of the two ends of the rotating bases. The butt joint device for butt joint welding of 9Ni steel is characterized in that the U-shaped placement tables are arranged on the rotating bases at the two ends of the few-shaped supporting rods, two workers can simultaneously perform welding operation, the U-shaped placement table and the 9Ni steel plate fixed thereon can be turned over after the front welding of the two 9Ni steel plates is completed, and the operation is simple, time-saving and labor-saving.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a butt welding device for butt welding of 9Ni steel. Background Technology

[0002] 9Ni steel is an ultra-low temperature steel with a nickel content of approximately 9%. It possesses excellent low-temperature toughness, high strength, corrosion resistance, and good weldability, and is widely used in the manufacture of large LNG storage tanks, cryogenic pressure vessels, and other equipment.

[0003] Currently, the main welding methods available for 9Ni steel are shielded metal arc welding (SMAW) and submerged arc welding (SAW). When butt welding two 9Ni steel plates, a butt welding device is often used to assist in the welding process. Generally, the two 9Ni steel plates are placed on the worktable of the butt welding device and fixed with clamps. During welding, the base material is beveled at 30° on one side, and no gap is left between the plates. After the front side is welded, the back side is cleaned with carbon arc gouging and ground before welding.

[0004] The existing butt welding equipment's worktable is suitable for V-grooves without gaps. During welding, the welding rod cannot reach the root of the groove, resulting in an increased carbon arc gouging depth on the back side, increasing the number of weld passes, and causing uncontrollable welding deformation. The existing butt welding equipment generally only allows one worker to perform welding operations, and the butt welding equipment cannot be height adjusted as needed. After welding the front side of the 9Ni steel plate, the clamps need to be released, the worker needs to flip the 9Ni steel, fix it again, and weld it. The operation steps are cumbersome, time-consuming, and labor-intensive, increasing the labor intensity of the workers. Therefore, a butt welding equipment for 9Ni steel is needed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a butt welding device for 9Ni steel, which solves the problems mentioned in the background.

[0006] This invention provides the following technical solution: a butt welding device for 9Ni steel, comprising a base plate; an installation groove is formed at the center of the upper surface of the base plate, and positioning grooves are formed on both sides of the upper surface of the base plate located at the installation groove; support tubes are provided at both ends of the upper surface of the base plate through the positioning grooves; a height adjustment component is provided at the center of the upper surface of the base plate located between the two support tubes; support columns are slidably arranged inside the two support tubes; the upper ends of the support columns extend to the outside through the upper openings of the support tubes; a Z-shaped support rod is provided at the upper end of each of the two support columns; rotating seats are rotatably arranged at both ends of the two Z-shaped support rods; a U-shaped placement platform is provided at both ends of the upper surface of the rotating platform; and a fixing component is provided on the U-shaped placement platform.

[0007] Preferably, the height adjustment assembly includes a drive motor, an adjustment screw, and a lifting rod. The lower end of the drive motor is inserted into the mounting groove, and the output end of the drive motor is fixedly connected to the lower end of the adjustment screw.

[0008] Preferably, a nut is provided at the middle end of the lifting rod, and the lifting rod is threadedly connected to the adjusting screw through the nut. The two support tubes are provided with strip-shaped slots at the middle ends of their side walls close to each other. The two ends of the lifting rod pass through the strip-shaped slots of the two support tubes and are fixedly connected to the lower end of the support column.

[0009] Preferably, the two support tubes are provided with a top connecting plate on one side close to each other, and a protective baffle is attached to the upper surface of the top connecting plate by a card holder.

[0010] Preferably, the U-shaped support rod is provided with connecting shafts at both ends, and the U-shaped support rod is rotatably connected to the rotating seat through the connecting shafts. The rotating seat is provided with limit support columns at both ends of its lower surface.

[0011] Preferably, the fixing component is provided on two U-shaped placement platforms on the upper surface of the rotating seat, which are far apart from each other on one side. The fixing component includes a column, a strip mounting plate and a clamping screw. The lower end of the column is connected to the U-shaped placement platform, and the strip mounting plate is provided on the top of the column.

[0012] Preferably, the end of the strip mounting plate furthest from the column is threadedly connected to the clamping screw, the lower end of the clamping screw is provided with a pressure plate, and the upper end of the clamping screw passes through the strip mounting plate and is provided with a knob.

[0013] Preferably, positioning vertical plates are fixedly provided on the outer surfaces of the side walls at both ends of the U-shaped support rod. Threaded holes are provided at both ends of the positioning vertical plates, and positioning pins are provided on the positioning vertical plates through the threaded holes. The front end surface of the positioning pin shaft is smooth, and positioning holes that cooperate with the positioning pins are provided at the center of the side walls at both ends of the U-shaped placement platform.

[0014] Preferably, the base plate has casters at all four corners of its lower surface, mounting holes at the midpoint of both sides of its lower surface, and support components at the center of both ends of the base plate. Each support component includes a Z-shaped side plate, a support screw, and a support foot. The upper plate of the Z-shaped side plate is fixedly connected to the base plate, the support screw is threaded to the bottom plate of the Z-shaped side plate, the support foot is located at the lower end of the support screw, and the upper end of the support screw passes through the Z-shaped side plate and has a handle.

[0015] Preferably, the two U-shaped placement platforms at both ends of the upper surface of the rotating seat are used to place two 9Ni steel plates to be welded. The two 9Ni steel plates adopt an X-shaped bevel with a 30° angle on both the front and back sides and an assembly gap of 2-4mm. The first pass adopts the argon arc welding method of single-sided welding and double-sided forming. Then, the front and back sides are alternately welded by shielded metal arc welding until the welding is completed.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The butt welding device for 9Ni steel is equipped with a height adjustment component. The drive motor can effectively drive the adjusting screw to rotate synchronously. Under the limiting action of the support tube, the lifting rod moves up and down in the vertical direction along the adjusting screw. During the up and down movement of the lifting rod, the support column can move up and down synchronously, thereby realizing the effective adjustment of the height of the U-shaped placement platform, which is convenient for welding personnel to perform welding operations. By setting a top connecting plate, it is easy to install a protective baffle. By setting a protective baffle, it is possible to avoid mutual interference when two workers are welding at the same time.

[0018] 2. The butt welding device for 9Ni steel has connecting shafts at both ends of the U-shaped support rod, which facilitates the installation of rotating seats at both ends of the U-shaped support rod and allows the rotating seats to rotate. Each rotating seat at both ends of the U-shaped support rod is equipped with a U-shaped placement platform, which allows two workers to perform welding operations simultaneously. After the two 9Ni steel plates are welded on the front side, the positioning pin at the upper end of the positioning vertical plate can be rotated and removed. The U-shaped placement platform and the 9Ni steel plate fixed on it can then be flipped over. The positioning pin can then be rotated to pass through the threaded hole at the lower end of the positioning vertical plate and inserted into the positioning hole on the U-shaped placement platform, ensuring the stability of the U-shaped placement platform after flipping. The operation is simple, time-saving and labor-saving.

[0019] 3. The butt welding device for 9Ni steel is equipped with a fixing component. When the 9Ni steel plate is placed on the upper surface of the U-shaped placement platform, rotating the knob can drive the clamping screw to rotate and move downward. During the downward movement of the clamping screw, the pressure plate moves downward synchronously and clamps the 9Ni steel plate, ensuring the stability of the 9Ni steel plate. The two U-shaped placement platforms can be used to place two 9Ni steel plates to be welded respectively. It can not only adapt to the butt welding method using X-shaped bevel, but also to the method of single-sided 30° bevel, with an assembly gap of 2-4mm. After assembly, a 20mm anti-deformation is reserved for butt welding. Similarly, the first welding method is argon arc welding with single-sided welding and double-sided forming, followed by shielded metal arc welding until the welding is completed. Neither method requires carbon arc gouging to clean the root, which can effectively control welding deformation, reduce the labor intensity of operators, and improve the working environment. Attached Figure Description

[0020] Figure 1This is one of the schematic diagrams of the overall structure of the butt welding device for 9Ni steel of the present invention;

[0021] Figure 2 This is the second schematic diagram of the overall structure of the butt welding device for 9Ni steel of the present invention;

[0022] Figure 3 This is a schematic diagram of the installation structure of the support tube and support column of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the base plate and support assembly of the present invention;

[0024] Figure 5 This is a schematic diagram illustrating the working principle of the height adjustment component of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the zigzag support rod and the positioning vertical plate of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the U-shaped placement platform and fixing components of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of two 9Ni steel plates to be welded together in the present invention.

[0028] Figure 9 For the present invention Figure 2 An enlarged schematic diagram of the structure at point A in the middle.

[0029] In the diagram: 1. Base plate; 101. Mounting slot; 102. Positioning slot; 2. Casters; 3. Support assembly; 301. Z-shaped side plate; 302. Support screw; 303. Support foot; 4. Support tube; 401. Strip groove; 5. Support column; 6. Height adjustment assembly; 601. Drive motor; 602. Adjusting screw; 603. Lifting rod; 7. Z-shaped support rod; 701. Connecting shaft; 8. Rotating seat; 9. U-shaped placement platform; 901. Positioning hole; 10. Top connecting plate; 11. Protective baffle; 12. Fixing assembly; 1201. Column; 1202. Strip mounting plate; 1203. Clamping screw; 1204. Pressure plate; 13. 9Ni steel plate; 1301. X-shaped bevel; 14. Positioning vertical plate; 1401. Positioning pin. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-9 The butt welding device for 9Ni steel includes a base plate 1; an installation groove 101 is provided at the center of the upper surface of the base plate 1, and positioning grooves 102 are provided on both sides of the upper surface of the base plate 1 located at the installation groove 101. Support tubes 4 are provided at both ends of the upper surface of the base plate 1 through the positioning grooves 102. A height adjustment component 6 is provided at the center of the upper surface of the base plate 1 located between the two support tubes 4. Support columns 5 are slidably provided inside the two support tubes 4. The upper ends of the support columns 5 extend to the outside through the upper openings of the support tubes 4. A Z-shaped support rod 7 is provided at the upper end of the two support columns 5. Rotating seats 8 are provided at both ends of the two Z-shaped support rods 7. U-shaped placement platforms 9 are provided at both ends of the upper surface of the rotating seats 8. Fixing components 12 are provided on the U-shaped placement platforms 9.

[0032] The height adjustment component 6 includes a drive motor 601, an adjusting screw 602, and a lifting rod 603. The lower end of the drive motor 601 is inserted into the mounting groove 101, and the output end of the drive motor 601 is fixedly connected to the lower end of the adjusting screw 602. A nut is provided at the middle of the lifting rod 603, and the lifting rod 603 is threadedly connected to the adjusting screw 602 through the nut. The two support tubes 4 are provided with strip-shaped slots 401 at the middle of their side walls, which are close to each other. The two ends of the lifting rod 603 pass through the strip-shaped slots 401 of the two support tubes 4 and are fixedly connected to the lower end of the support column 5. The drive motor 601 is electrically connected to an external power source through a wire. The operation of the drive motor 601 can effectively drive the adjusting screw 602 to rotate synchronously. Under the limiting action of the support tube 4, the lifting rod 603 moves up and down along the vertical direction of the adjusting screw 602. During the up and down movement of the lifting rod 603, the support column 5 can move up and down synchronously, thereby realizing the effective adjustment of the height of the U-shaped placement platform 9, which is convenient for welding personnel to perform welding operations.

[0033] Among them, the two support pipes 4 are provided with a top connecting plate 10 on the upper end of one side close to each other. The upper surface of the top connecting plate 10 is connected to a protective baffle 11 by a card holder. By setting the top connecting plate 10, it is easy to install the protective baffle 11. By setting the protective baffle 11, it is possible to avoid mutual interference when two workers are performing welding operations at the same time.

[0034] The fixing component 12 is located on the upper surface of the rotating seat 8. The two U-shaped placement platforms 9 are located at opposite ends of each other. The fixing component 12 includes a column 1201, a strip mounting plate 1202, and a clamping screw 1203. The lower end of the column 1201 is connected to the U-shaped placement platform 9. The strip mounting plate 1202 is located at the top of the column 1201. The end of the strip mounting plate 1202 away from the column 1201 is threadedly connected to the clamping screw 1203. The lower end of the clamping screw 1203 is provided with a pressure plate 1204. The upper end of the clamping screw 1203 passes through the strip mounting plate 1202 and is provided with a knob. When the 9Ni steel plate 13 is placed on the upper surface of the U-shaped placement platform 9, the clamping screw 1203 can be rotated and moved downward by rotating the knob. During the downward movement of the clamping screw 1203, the pressure plate 1204 can be moved downward synchronously and clamp the 9Ni steel plate 13, ensuring the stability of the 9Ni steel plate 13.

[0035] The U-shaped support rod 7 has connecting shafts 701 at both ends, and is rotatably connected to the rotating seat 8 via the connecting shafts 701. Limiting support columns are provided at both ends of the lower surface of the rotating seat 8. Positioning vertical plates 14 are fixedly installed on the outer surfaces of the side walls at both ends of the U-shaped support rod 7. Threaded holes are provided at both ends of the positioning vertical plates 14, and positioning pins 1401 are installed through these threaded holes. The front end surface of the positioning pins 1401 is smooth. Positioning holes 901 that cooperate with the positioning pins 1401 are provided at the center of the side walls at both ends of the U-shaped placement platform 9. By providing connecting shafts 701 at both ends of the U-shaped support rod 7, the... Rotating seats 8 are installed at both ends of the U-shaped support rod 7, and the rotating seats 8 can be rotated. U-shaped placement platforms 9 are installed on the rotating seats 8 at both ends of the U-shaped support rod 7, which allows two workers to perform welding operations at the same time. After the two 9Ni steel plates 13 are welded on the front, the positioning pin 1401 at the upper end of the positioning vertical plate 14 can be rotated and removed. The U-shaped placement platform 9 and the 9Ni steel plate 13 fixed on it can be flipped over. Then, the positioning pin 1401 is rotated to pass through the threaded hole at the lower end of the positioning vertical plate 14 and is inserted into the positioning hole 901 on the U-shaped placement platform 9, ensuring the stability of the U-shaped placement platform 9 after flipping. The operation is simple, time-saving and labor-saving.

[0036] The base plate 1 has casters 2 at each of its four corners on its lower surface. Mounting holes are located at the center of both sides of the lower surface of the base plate 1. Support components 3 are located at the center of both ends of the base plate 1. Each support component 3 includes a Z-shaped side plate 301, a support screw 302, and a support foot 303. The upper plate of the Z-shaped side plate 301 is fixedly connected to the base plate 1. The support screw 302 is threadedly connected to the bottom plate of the Z-shaped side plate 301. The support foot 303 is located at the lower end of the support screw 302. The upper end of the support screw 302 passes through the Z-shaped side plate 301 and has a handle. The 9Ni steel butt welding device is equipped with casters 2, which facilitates the movement of the device and allows for effective position adjustment, saving time and effort. After the position of the 9Ni steel butt welding device is adjusted, the handle is turned to drive the support screw 302 to rotate and move downward. During the downward movement of the support screw 302, the support foot 303 moves downward synchronously and contacts the ground, which can effectively ensure the stability of the 9Ni steel butt welding device. An additional mounting hole is opened on the lower surface of the base plate 1 to connect an external side support rod, further ensuring the stability of the 9Ni steel butt welding device.

[0037] The rotating base 8 has two U-shaped platforms 9 at both ends of its upper surface, which are used to place two 9Ni steel plates 13 to be welded. The two 9Ni steel plates 13 have an X-shaped bevel 1301, with a 30° angle on each side and a 2-4mm gap between them. The first pass uses argon arc welding with single-sided welding and double-sided forming, followed by staggered welding on both sides using shielded metal arc welding until the welding is complete. The two U-shaped platforms 9 at both ends of the upper surface of the rotating base 8 can be used to place two... The 9Ni steel plate 13 to be welded can be adapted to the butt joint method using the X-type bevel 1301, or it can be welded with a single-sided 30° bevel, with a 2-4mm gap between the joints and a 20mm allowance for reverse deformation after assembly. Similarly, the first pass uses argon arc welding with single-sided welding and double-sided forming, followed by shielded metal arc welding until the welding is completed. Neither method requires carbon arc gouging to clean the root, which can effectively control welding deformation, reduce the labor intensity of the workers, and improve the working environment.

[0038] Working principle: Two U-shaped placement platforms 9 are set at both ends of the upper surface of the rotating seat 8. Each U-shaped platform 9 can be used to place two 9Ni steel plates 13 to be welded. When the 9Ni steel plate 13 is placed on the upper surface of the U-shaped platform 9, rotating the knob will drive the clamping screw 1203 to rotate and move downwards. During the downward movement of the clamping screw 1203, the pressure plate 1204 will move downwards synchronously and clamp the 9Ni steel plate 13, ensuring the stability of the 9Ni steel plate 13. The two U-shaped placement platforms 9 can be used to place two plates... The 9Ni steel plate 13 to be welded can be adapted to the butt joint method using the X-type bevel 1301, or it can be welded with a single-sided 30° bevel, with a 2-4mm gap between the joints and a 20mm allowance for reverse deformation after the joints are assembled. Similarly, the first pass is welded using the argon arc welding method with single-sided welding and double-sided forming, followed by shielded metal arc welding until the welding is completed. Neither method requires carbon arc gouging to clean the root, which can effectively control welding deformation, reduce the labor intensity of the workers, and improve the working environment.

[0039] Furthermore, by providing connecting shafts 701 at both ends of the U-shaped support rod 7, it is convenient to install rotating seats 8 at both ends of the U-shaped support rod 7, and the rotating seats 8 can be rotated. U-shaped placement platforms 9 are installed on the rotating seats 8 at both ends of the U-shaped support rod 7, which allows two workers to perform welding operations at the same time. After the two 9Ni steel plates 13 are welded on the front, the positioning pin 1401 at the upper end of the positioning vertical plate 14 can be rotated and removed, and the U-shaped placement platform 9 and the 9Ni steel plate 13 fixed on it can be flipped. Then, the positioning pin 1401 is rotated to pass through the threaded hole at the lower end of the positioning vertical plate 14 and is inserted into the positioning hole 901 on the U-shaped placement platform 9, ensuring the stability of the U-shaped placement platform 9 after flipping. The operation is simple, time-saving and labor-saving.

[0040] Furthermore, by setting up a height adjustment component 6, the drive motor 601 can effectively drive the adjusting screw 602 to rotate synchronously. Under the limiting action of the support tube 4, the lifting rod 603 moves up and down along the vertical direction of the adjusting screw 602. During the up and down movement of the lifting rod 603, it can drive the support column 5 to move up and down synchronously, thereby realizing the effective adjustment of the height of the U-shaped placement platform 9, which is convenient for welding personnel to perform welding operations. By setting up a top connecting plate 10, it is convenient to install a protective baffle 11. By setting up a protective baffle 11, it is possible to avoid mutual interference when two workers are performing welding operations at the same time.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

A butt welding device for 1.9Ni steel, characterized in that, Includes a base plate (1); the upper surface of the base plate (1) has a mounting groove (101) at the center, and the upper surface of the base plate (1) has a positioning groove (102) on both sides of the mounting groove (101). The upper surface of the base plate (1) has a support tube (4) through the positioning groove (102) at both ends. The upper surface of the base plate (1) has a height adjustment component (6) between the two support tubes (4). The two support tubes (4) have a slidable support column (5). The upper end of the support column (5) extends through the upper opening of the support tube (4) to the outside. The upper end of the two support columns (5) has a Z-shaped support rod (7). The two Z-shaped support rods (7) have a rotating seat (8) at both ends. The upper surface of the rotating seat (8) has a U-shaped placement platform (9) at both ends. The U-shaped placement platform (9) has a fixing component (12). The height adjustment assembly (6) includes a drive motor (601), an adjustment screw (602) and a lifting rod (603). The lower end of the drive motor (601) is inserted into the mounting groove (101), and the output end of the drive motor (601) is fixedly connected to the lower end of the adjustment screw (602). The lifting rod (603) is provided with a nut at the middle end. The lifting rod (603) is threadedly connected to the adjusting screw (602) through the nut. The two support tubes (4) are close to each other and have a strip groove (401) at the middle end of one side wall. The two ends of the lifting rod (603) pass through the strip groove (401) of the two support tubes (4) and are fixedly connected to the lower end of the support column (5). The two support tubes (4) are provided with a top connecting plate (10) on one side close to each other. The upper surface of the top connecting plate (10) is connected to a protective baffle (11) by a card holder. The zig-shaped support rod (7) is provided with connecting shafts (701) at both ends. The zig-shaped support rod (7) is rotatably connected to the rotating seat (8) through the connecting shafts (701). The rotating seat (8) is provided with limit support columns at both ends of its lower surface. The fixing component (12) is set on two U-shaped placement platforms (9) on the upper surface of the rotating seat (8) and they are far apart on one side. The fixing component (12) includes a column (1201), a strip mounting plate (1202) and a clamping screw (1203). The lower end of the column (1201) is connected to the U-shaped placement platform (9), and the strip mounting plate (1202) is set on the top of the column (1201).

2. The butt welding device for 9Ni steel according to claim 1, characterized in that, The end of the strip mounting plate (1202) away from the column (1201) is threadedly connected to the clamping screw (1203). The lower end of the clamping screw (1203) is provided with a pressure plate (1204), and the upper end of the clamping screw (1203) passes through the strip mounting plate (1202) and is provided with a knob.

3. The butt welding device for 9Ni steel according to claim 1, characterized in that, The two ends of the zig-shaped support rod (7) are fixedly provided with positioning vertical plates (14). The two ends of the positioning vertical plates (14) are provided with threaded holes. The positioning vertical plates (14) are provided with positioning pins (1401) through the threaded holes. The front end surface of the positioning pin (1401) is smooth. The two ends of the U-shaped placement platform (9) are provided with positioning holes (901) that cooperate with the positioning pins (1401).

4. The butt welding device for 9Ni steel according to claim 1, characterized in that, The base plate (1) is provided with casters (2) at the four corners of the lower surface. Mounting holes are opened at the middle of both sides of the lower surface of the base plate (1). Support components (3) are provided at the center of both ends of the base plate (1). The support components (3) include Z-shaped side plates (301), support screws (302) and support feet (303). The upper plate of the Z-shaped side plate (301) is fixedly connected to the base plate (1). The support screws (302) are threadedly connected to the bottom plate of the Z-shaped side plate (301). The support feet (303) are located at the lower end of the support screws (302). The upper end of the support screws (302) passes through the Z-shaped side plate (301) and is provided with a handle.

5. The butt welding device for 9Ni steel according to claim 1, characterized in that, The two U-shaped placement platforms (9) set at both ends of the upper surface of the rotating seat (8) are used to place two 9Ni steel plates (13) to be welded. The two 9Ni steel plates (13) adopt an X-shaped bevel (1301), with 30° on each side and a gap of 2-4mm between them. The first pass adopts the argon arc welding method of single-sided welding and double-sided forming. Then, the front and back sides are alternately welded by shielded metal arc welding until the welding is completed.

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