9Ni steel submerged arc welding device

Abstract

The present invention relates to the technical field of welding devices, and discloses a Ni steel submerged arc welding device, comprising a base, a bottom frame fixedly provided on the upper end surface of the base, a height adjustment assembly provided on the upper end of the base through the bottom frame, a workbench provided on the upper end of the height adjustment assembly, a strip-shaped slot provided on one side of the upper end surface of the workbench, a placement seat connected to the upper end surface of the workbench through the strip-shaped slot, a first strip-shaped oblique opening provided on the side of the workbench close to the strip-shaped slot, a second strip-shaped oblique opening corresponding to the first strip-shaped oblique opening provided on the lower end of one side wall of the V-shaped groove of the placement seat, T-shaped slots provided on the upper ends of both side walls of the V-shaped groove of the placement seat, and a clamping assembly provided on the placement seat through the T-shaped slot. The 9Ni steel submerged arc welding device is provided with a clamping assembly, and a clamping screw can be driven to rotate and move downward by turning a knob. During the downward movement of the clamping screw, the pressure plate is driven to move downward synchronously, thereby clamping the 9Ni steel plate.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, in particular to a 9Ni steel submerged arc welding device. Background Art

[0002] 9Ni steel is a medium-alloy steel containing approximately 9% Ni. It exhibits excellent low-temperature toughness. Due to its excellent low-temperature properties, it is widely used in the petroleum, chemical, shipbuilding, and offshore engineering industries.

[0003] Currently, the main methods used for welding 9Ni steel are: arc welding and submerged arc welding. When welding component fillet welds, arc welding is usually the main method, and the welding speed is relatively slow, which affects production efficiency. At the same time, during submerged arc welding or arc welding, the steel plate is often placed on the welding device workbench, and the welding device workbench cannot be effectively adjusted in height according to needs. The 9Ni steel plate is placed on the device workbench, and the relative position of the two steel plates cannot be effectively adjusted, and the position of the two steel plates to be welded cannot be fixed. The quality of arc welding is easily affected by various factors, and the welding quality is not stable. Therefore, it is necessary to provide a 9Ni steel submerged arc welding device to solve the above problems. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a 9Ni steel submerged arc welding device, which solves the problems mentioned in the above background.

[0005] The present invention provides the following technical solution: a 9Ni steel submerged arc welding device comprises a base, the upper surface of the base is fixedly provided with a bottom frame, the upper end of the base is provided with a height adjustment component through the bottom frame, and a workbench is provided at the upper end of the height adjustment component, a strip groove is provided on one side of the upper surface of the workbench, and the upper surface of the workbench is clamped with a placement seat through the strip groove, and the placement seat is provided with a V-shaped groove, and two Ni steel plates are placed in a T-shaped butt-jointed manner in the V-shaped groove of the placement seat. The upper surface of the workbench and one side of the placement seat are provided with a track bar for moving the submerged arc welding machine trolley walking mechanism, the workbench is provided with a first strip oblique opening on one side close to the strip groove, and a lower end of one side wall of the V-shaped groove of the placement seat is provided with a second strip oblique opening corresponding to the first strip oblique opening, and the upper ends of both side walls of the V-shaped groove of the placement seat are provided with T-shaped slide grooves, and a clamping assembly is provided on the placement seat through the T-shaped slide groove.

[0006] Preferably, corresponding oblique through holes are provided on the workbench and the placement seat and on both sides of the second strip-shaped oblique opening. The workbench is provided with a U-shaped support frame through the oblique through holes, and the front ends of the two side walls of the U-shaped support frame pass through the oblique through holes and extend into the V-shaped groove of the placement seat.

[0007] Preferably, corner blocks are fixedly provided at both ends of the V-groove of the placement seat, and a positioning pin is provided on the corner block. The pin shaft end of the positioning pin is threadedly connected to the positioning pin through an external thread, and a number of positioning holes that cooperate with the positioning pin are equidistantly provided on both side walls of the U-shaped support frame, and handles are provided at the front end of both side walls of the U-shaped support frame.

[0008] Preferably, the clamping assembly includes a fixing frame, a clamping screw and a pressure plate, a slider is provided at the lower end of the fixing frame, the fixing frame is slidably connected to the placement seat through the slider, the clamping screw is threadedly connected to the top plate of the fixing frame, the pressure plate is provided at the lower end of the clamping screw, and the upper end of the clamping screw passes through the top plate of the fixing frame and is provided with a knob.

[0009] Preferably, the height adjustment assembly includes a bidirectional screw, a handle and a driving connecting rod. The bidirectional screw is rotatably arranged inside the bottom frame. One end of the bidirectional screw passes through the side wall of the bottom frame and is connected to the handle. The external threads opened at both ends of the bidirectional screw are in opposite directions. Two driving connecting rods are provided.

[0010] Preferably, the two driving links are both threadedly connected to the bidirectional screw, a first sliding connection block is provided at both ends of the driving links, and a limiting slide rod is provided on both sides inside the bottom frame, and the limiting slide rod passes through the first sliding connection block and is slidably connected to the first sliding connection block.

[0011] Preferably, a cross support rod is rotatably provided on the first sliding connection block, a top frame is provided on the lower end surface of the workbench, a second sliding connection block is slidably provided in the top frame, and the upper end of the cross support rod is rotatably connected to the second sliding connection block.

[0012] Preferably, a buffer assembly is provided on the upper surface of the workbench and at both ends of the track bar. The buffer assembly includes a vertical plate, an axis rod and a strip connecting plate. The lower end of the vertical plate is fixedly connected to the workbench, and axis holes are opened on both sides of the upper end of the vertical plate.

[0013] Preferably, a limit plate is provided at one end of the shaft rod, and the end of the shaft rod away from the limit plate passes through the shaft hole and is connected to the strip connecting plate. A rubber sleeve is provided on the outer surface of the shaft rod, and the rubber sleeve is located between the vertical plate and the strip connecting plate.

[0014] Preferably, extension plates are fixedly provided at both ends of the placement seat, fixing screws are provided on the extension plates, and the extension plates are fixedly connected to the workbench through the fixing screws.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The 9Ni steel submerged arc welding device is convenient for installing the U-shaped support frame by providing an oblique through-hole. The positioning pin is rotated to move outward. When the front end of the positioning pin is out of the positioning hole, the handle is held to control the length of the two side walls of the U-shaped support frame extending into the V-shaped groove, thereby adjusting the position of the U-shaped support frame. When the position adjustment of the U-shaped support frame is completed, the positioning pin is rotated again so that the front end of the positioning pin is stuck in the new positioning hole to ensure that the position of the U-shaped support frame is fixed. The operation is simple and can adapt to 9Ni steel plates of different widths. When the lower end of the 9Ni steel plate passes through the first oblique opening and the second oblique opening and extends under the workbench, the U-shaped support frame can effectively play a supporting and limiting role, so that the two 9Ni steel plates can be T-jointed.

[0017] 2. The 9Ni steel submerged arc welding device is equipped with a clamping assembly. By turning the knob, the clamping screw can be driven to rotate and move downward. During the downward movement of the clamping screw, the pressure plate will be driven to move downward synchronously and clamp the 9Ni steel plate. This can ensure that after the two 9Ni steel plates are T-shaped butt-jointed, there is an assembly gap of 1mm between the two butt joints, which effectively saves welding time and ensures welding quality.

[0018] 3. The 9Ni steel submerged arc welding device is provided with a height adjustment component. By turning the handle, the bidirectional screw can be driven to rotate synchronously. Then, under the limiting action of the limiting slide bar, the two driving connecting rods can move horizontally along the bidirectional screw, approaching or moving away from each other. During the movement of the driving connecting rod, the first sliding connection block will be driven to move synchronously. When the first sliding connection blocks are close to each other, the cross support rod will lift the workbench. When the first sliding connection blocks are away from each other, the cross support rod will drive the workbench to move downward, thereby realizing effective adjustment of the workbench height, thereby adapting to operation or observation by workers of different heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the 9Ni steel submerged arc welding device of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection structure between the height adjustment component and the base of the present invention;

[0021] Figure 3 This is a schematic diagram of the connection structure between the cross support rods and the top frame of the present invention;

[0022] Figure 4 This is a schematic diagram of the installation structure of the U-shaped support frame and the pressing assembly of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the workbench of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the placement seat of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the compression assembly of the present invention;

[0026] Figure 8 This is a schematic structural diagram of the U-shaped support frame of the present invention;

[0027] Figure 9 For the present invention Figure 4 A magnified schematic diagram of the structure at center A.

[0028] In the figure: 1, base; 2, bottom frame; 201, limit slide; 3, height adjustment assembly; 301, bidirectional screw; 302, handle; 303, drive link; 304, first sliding connection block; 305, cross support rod; 4, workbench; 401, strip slot; 402, first strip oblique opening; 403, track bar; 404, top frame; 405, second sliding connection block; 5, buffer assembly; 501, vertical plate; 5 02. Shaft; 503. Strip connecting plate; 504. Rubber sleeve; 6. Placement seat; 601. T-shaped slide; 602. Second strip oblique opening; 603. Corner block; 604. Extension plate; 7. U-shaped support frame; 701. Positioning hole; 702. Handle; 8. Positioning pin; 9. Clamping assembly; 901. Fixing frame; 902. Clamping screw; 903. Pressure plate; 904. Knob; 10. Oblique through hole; 11. 9Ni steel plate. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-9 , 9Ni steel submerged arc welding device, including a base 1, the upper end surface of the base 1 is fixedly provided with a bottom frame 2, the upper end of the base 1 is provided with a height adjustment component 3 through the bottom frame 2, the upper end of the height adjustment component 3 is provided with a workbench 4, the upper end surface of the workbench 4 is provided with a strip groove 401, the upper end surface of the workbench 4 is connected with a placement seat 6 through the strip groove 401, the placement seat 6 is provided with a V-shaped groove, and two 9Ni steel plates 11 are placed in a T-shaped butt joint in the V-shaped groove of the placement seat 6, the workbench 4 is provided with a strip groove 401, the upper end surface of the workbench 4 is connected with a placement seat 6, the placement seat 6 is provided with a V-shaped groove, and two 9Ni steel plates 11 are placed in a T-shaped butt joint in the V-shaped groove of the placement seat 6, the workbench 4 is provided with a strip groove 401, the upper end surface of the workbench 4 is provided with a strip groove 401, the upper end surface of the workbench 4 is connected with a placement seat 6, the upper end surface of the workbench 4 is provided with a strip groove A track bar 403 for the movement of the submerged arc welding machine trolley travel mechanism is provided on the upper surface of the workbench 4 and on one side of the placement seat 6. A first strip-shaped oblique opening 402 is provided on the side of the workbench 4 close to the strip-shaped slot 401. A second strip-shaped oblique opening 602 corresponding to the first strip-shaped oblique opening 402 is provided at the lower end of one side wall of the V-shaped slot of the placement seat 6. T-shaped slide grooves 601 are provided on the upper ends of both side walls of the V-shaped slot of the placement seat 6. A clamping assembly 9 is provided on the placement seat 6 through the T-shaped slide groove 601.

[0031] Among them, corresponding oblique through holes 10 are provided on the workbench 4 and the placement seat 6 and on both sides of the second strip oblique opening 602. The workbench 4 is provided with a U-shaped support frame 7 through the oblique through holes 10. The front ends of the two side walls of the U-shaped support frame 7 pass through the oblique through holes 10 and extend into the V-shaped groove of the placement seat 6. By setting the oblique through holes 10, it is convenient to install the U-shaped support frame 7. When the lower end of the 9Ni steel plate 11 passes through the first strip oblique opening 402 and the second strip oblique opening 602 and extends into the bottom of the workbench 4, the U-shaped support frame 7 can effectively play a supporting and limiting role.

[0032] Among them, both ends of the V-shaped groove of the placement seat 6 are fixedly provided with corner blocks 603, and a positioning pin 8 is provided on the corner block 603. The pin shaft end of the positioning pin 8 is threadedly connected to the positioning pin 8 through an external thread. A number of positioning holes 701 that cooperate with the positioning pin 8 are evenly spaced on the two side walls of the U-shaped support frame 7. The front ends of the two side walls of the U-shaped support frame 7 are provided with handles 702. By setting the corner blocks 603, it is convenient to install the positioning pin 8. The positioning pin 8 is rotated to move outward. When the front end of the positioning pin 8 is out of the positioning hole 701, the handle 702 is held to control the length of the two side walls of the U-shaped support frame 7 extending into the V-shaped groove, thereby adjusting the position of the U-shaped support frame 7. When the position adjustment of the U-shaped support frame 7 is completed, the positioning pin 8 is rotated again so that the front end of the positioning pin 8 is stuck in the new positioning hole 701, ensuring that the position of the U-shaped support frame 7 is fixed. It is simple to operate and can adapt to 9Ni steel plates 11 of different widths.

[0033] Among them; the clamping assembly 9 includes a fixing frame 901, a clamping screw 902 and a pressure plate 903. A slider is provided at the lower end of the fixing frame 901, and the fixing frame 901 is slidably connected to the placement seat 6 through the slider. The clamping screw 902 is threadedly connected to the top plate of the fixing frame 901, and the pressure plate 903 is provided at the lower end of the clamping screw 902. The upper end of the clamping screw 902 passes through the top plate of the fixing frame 901 and is provided with a knob 904. By turning the knob 904, the clamping screw 902 can be driven to rotate and move downward. During the downward movement of the clamping screw 902, the pressure plate 903 will be driven to move downward synchronously and clamp the 9Ni steel plate 11, which can ensure that after the two 9Ni steel plates 11 are T-shaped docked, there is an assembly gap of 1mm at the docking point between the two.

[0034] Among them, the height adjustment component 3 includes a bidirectional screw 301, a handle 302 and a driving connecting rod 303. The bidirectional screw 301 is rotatably arranged inside the bottom frame 2. One end of the bidirectional screw 301 passes through the side wall of the bottom frame 2 and is connected to the handle 302. The external threads opened at both ends of the bidirectional screw 301 are in opposite directions. There are two driving connecting rods 303. By providing a base 1, it can effectively support the whole and facilitate the installation of the bottom frame 2. By providing the bottom frame 2, it is convenient to install the bidirectional screw 301 and realize the rotatability of the bidirectional screw 301.

[0035] Among them; the two driving links 303 are threadedly connected to the bidirectional screw 301, and the first sliding connection block 304 is provided at both ends of the driving link 303. A limited sliding rod 201 is provided on both sides of the bottom frame 2. The limited sliding rod 201 passes through the first sliding connection block 304 and is slidably connected to the first sliding connection block 304. A cross support rod 305 is rotatably provided on the first sliding connection block 304. A top frame 404 is provided on the lower end surface of the workbench 4. A second sliding connection block 405 is slidably provided in the top frame 404. The upper end of the cross support rod 305 is rotatably connected to the second sliding connection block 405. By turning the handle 302 can drive the bidirectional screw 301 to rotate synchronously, and then under the limiting action of the limiting slide 201, the two driving links 303 can move horizontally along the bidirectional screw 301, approaching or moving away from each other. During the movement of the driving link 303, the first sliding connection block 304 will be driven to move synchronously. When the first sliding connection blocks 304 are close to each other, the cross support rod 305 will lift the workbench 4. When the first sliding connection blocks 304 are away from each other, the cross support rod 305 will drive the workbench 4 to move downward, thereby effectively adjusting the height of the workbench 4, thereby adapting to operation or observation by staff of different heights.

[0036] Among them, a buffer assembly 5 is provided on the upper surface of the workbench 4 and at both ends of the track bar 403. The buffer assembly 5 includes a vertical plate 501, an axle rod 502 and a strip connecting plate 503. The lower end of the vertical plate 501 is fixedly connected to the workbench 4, and both sides of the upper end of the vertical plate 501 are provided with an axle hole. A limit plate is provided at one end of the axle rod 502, and the end of the axle rod 502 away from the limit plate passes through the axle hole and is connected to the strip connecting plate 503. A rubber sleeve 504 is provided on the outer surface of the axle rod 502, and the rubber sleeve 504 is located between the vertical plate 501 and the strip connecting plate 503. When the traveling mechanism of the submerged arc welding machine trolley moves along the track bar 403 and hits the strip connecting plate 503, the strip connecting plate 503 is squeezed by the traveling mechanism of the submerged arc welding machine trolley, which will squeeze the rubber sleeve 504 and drive the axle rod 502 to move to the side away from the track bar 403. The contraction of the rubber sleeve 504 can effectively buffer the external force and avoid damage to the traveling mechanism of the submerged arc welding machine trolley.

[0037] Among them, the placement seat 6 is fixed with an extension plate 604 at both ends, and the extension plate 604 is provided with fixing screws. The extension plate 604 is fixedly connected to the workbench 4 by fixing screws. By providing the extension plate 604 and the fixing screws, it is easy to install and fix the placement seat 6 to ensure the stability of the placement seat 6.

[0038] When the U-shaped support frame 7 is adjusted, the positioning pin 8 is rotated again so that the front end of the positioning pin 8 is stuck in the new positioning hole 701, ensuring that the position of the U-shaped support frame 7 is fixed. The operation is simple and can adapt to 9Ni steel plates 11 of different widths. When the two 9Ni steel plates 11 are placed, the backs of the two 9Ni steel plates 11 are respectively close to the two side walls of the V-shaped groove of the placement seat 6. When the lower end of one of the 9Ni steel plates 11 passes through the first strip oblique opening 402 and the second strip oblique opening 602 and extends under the workbench 4, the U-shaped support frame 7 can effectively play a supporting and limiting role, so that the two 9Ni steel plates 11 can be T-jointed.

[0039] Furthermore, by providing a clamping assembly 9, the clamping screw 902 can be driven to rotate and move downward by turning the knob 904. During the downward movement of the clamping screw 902, the pressure plate 903 will be driven to move downward synchronously, and the 9Ni steel plate 11 will be clamped, so that after the two 9Ni steel plates 11 are T-shaped butt-jointed, there is an assembly gap of 1mm at the joint between the two. When the traveling mechanism of the submerged arc welding machine trolley moves along the track bar 403 and hits the strip connecting plate 503, the strip connecting plate 503 is squeezed by the traveling mechanism of the submerged arc welding machine trolley, which will squeeze the rubber sleeve 504 and drive the shaft rod 502 to move away from the track bar 403. The contraction of the rubber sleeve 504 can effectively buffer the external force and avoid damage to the traveling mechanism of the submerged arc welding machine trolley.

[0040] Furthermore, by rotating the handle 302, the bidirectional screw 301 can be driven to rotate synchronously, and then under the limiting action of the limiting slide 201, the two driving links 303 can move horizontally along the bidirectional screw 301, approaching or moving away from each other. During the movement of the driving link 303, the first sliding connection block 304 will be driven to move synchronously. When the first sliding connection blocks 304 approach each other, the cross support rod 305 will lift the workbench 4. When the first sliding connection blocks 304 move away from each other, the cross support rod 305 will drive the workbench 4 to move downward, thereby effectively adjusting the height of the workbench 4, thereby adapting to operation or observation by staff of different heights.

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

Claims

1. 9Ni steel submerged arc welding device, characterized in that, The invention comprises a base (1), wherein a bottom frame (2) is fixedly provided on the upper surface of the base (1), a height adjustment component (3) is provided on the upper end of the base (1) through the bottom frame (2), a workbench (4) is provided on the upper end of the height adjustment component (3), a strip-shaped slot (401) is provided on one side of the upper surface of the workbench (4), a placement seat (6) is connected to the upper surface of the workbench (4) through the strip-shaped slot (401), a V-shaped slot is provided on the placement seat (6), two 9Ni steel plates (11) are placed in a T-shaped butt joint in the V-shaped slot of the placement seat (6), and the workbench (4) is provided with a strip-shaped slot (401). A track bar (403) for the movement of the submerged arc welding machine trolley travel mechanism is provided on the upper surface of the workbench (4) and located on one side of the placement seat (6); a first strip-shaped oblique opening (402) is provided on the side of the workbench (4) close to the strip-shaped slot (401); a second strip-shaped oblique opening (602) corresponding to the first strip-shaped oblique opening (402) is provided on the lower end of one side wall of the V-shaped slot of the placement seat (6); a T-shaped slide groove (601) is provided on the upper end of both side walls of the V-shaped slot of the placement seat (6); and a clamping assembly (9) is provided on the placement seat (6) through the T-shaped slide groove (601); The workbench (4) and the placement seat (6) are provided with corresponding oblique through-holes (10) on both sides of the second strip-shaped oblique opening (602); the workbench (4) is provided with a U-shaped support frame (7) through the oblique through-holes (10); the front ends of the two side walls of the U-shaped support frame (7) pass through the oblique through-holes (10) and extend into the V-shaped groove of the placement seat (6); The lower end of the 9Ni steel plate (11) passes through the first strip-shaped oblique opening (402) and the second strip-shaped oblique opening (602) and extends below the workbench (4).

2. The 9Ni steel submerged arc welding device according to claim 1, characterized in that: Corner blocks (603) are fixedly provided at both ends of the V-shaped groove of the placement seat (6), and a positioning pin (8) is provided on the corner block (603). The pin shaft end of the positioning pin (8) is threadedly connected to the corner block (603) through an external thread. A plurality of positioning holes (701) that cooperate with the positioning pin (8) are evenly spaced on the two side walls of the U-shaped support frame (7), and handles (702) are provided at the front ends of the two side walls of the U-shaped support frame (7).

3. The 9Ni steel submerged arc welding device according to claim 1, characterized in that: The pressing assembly (9) comprises a fixing frame (901), a pressing screw (902) and a pressure plate (903); a slider is provided at the lower end of the fixing frame (901); the fixing frame (901) is slidably connected to the placement seat (6) via the slider; the pressing screw (902) is threadedly connected to the top plate of the fixing frame (901); the pressure plate (903) is provided at the lower end of the pressing screw (902); and the upper end of the pressing screw (902) passes through the top plate of the fixing frame (901) and is provided with a knob (904).

4. The 9Ni steel submerged arc welding device according to claim 1, characterized in that: The height adjustment assembly (3) comprises a bidirectional screw (301), a handle (302) and a driving connecting rod (303). The bidirectional screw (301) is rotatably arranged inside the bottom frame (2). One end of the bidirectional screw (301) passes through the side wall of the bottom frame (2) and is connected to the handle (302). The external threads at both ends of the bidirectional screw (301) are in opposite directions. Two driving connecting rods (303) are provided.

5. The 9Ni steel submerged arc welding device according to claim 4, characterized in that: The two driving connecting rods (303) are both threadedly connected to the bidirectional screw (301), and first sliding connection blocks (304) are provided at both ends of the driving connecting rod (303). Limiting sliding rods (201) are provided on both sides of the interior of the bottom frame (2), and the limiting sliding rods (201) pass through the first sliding connection block (304) and are slidably connected to the first sliding connection block (304).

6. The 9Ni steel submerged arc welding device according to claim 5, characterized in that: A cross supporting rod (305) is rotatably provided on the first sliding connection block (304), a top frame (404) is provided on the lower end surface of the workbench (4), a second sliding connection block (405) is slidably provided in the top frame (404), and the upper end of the cross supporting rod (305) is rotatably connected to the second sliding connection block (405).

7. The 9Ni steel submerged arc welding device according to claim 1, characterized in that: Buffer components (5) are provided on the upper surface of the workbench (4) and at both ends of the track bar (403). The buffer components (5) include a vertical plate (501), an axle rod (502) and a strip connecting plate (503). The lower end of the vertical plate (501) is fixedly connected to the workbench (4), and both sides of the upper end of the vertical plate (501) are provided with axle holes.

8. The 9Ni steel submerged arc welding device according to claim 7, characterized in that: A limiting disk is provided at one end of the shaft rod (502), and the end of the shaft rod (502) away from the limiting disk passes through the shaft hole and is connected to the strip connecting plate (503). A rubber sleeve (504) is provided on the outer surface of the shaft rod (502), and the rubber sleeve (504) is located between the vertical plate (501) and the strip connecting plate (503).

9. The 9Ni steel submerged arc welding device according to claim 1, characterized in that: Extension plates (604) are fixedly provided at both ends of the placement seat (6), fixing screws are provided on the extension plates (604), and the extension plates (604) are fixedly connected to the workbench (4) via the fixing screws.

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