Limiting device for steel structure welding

Abstract

The invention provides a limiting device for steel structure welding, and relates to the technical field of welding, the limiting device comprises a base, two telescopic supporting rods are slidably mounted on the base, the distance between the two telescopic supporting rods is adjustable, a fixed seat is mounted on an output shaft of each telescopic supporting rod, a ball groove is formed in the fixed seat, and a rotating ball is rotatably mounted in each ball groove; a connecting rod is fixedly connected to the rotating ball, and a positioning block is fixedly installed at the end, away from the rotating ball, of the connecting rod. According to the limiting device for steel structure welding, through the arrangement of the base, the telescopic supporting rod, the fixing base, the rotating ball, the connecting rod, the positioning block, the positioning telescopic rod, the driving structure, the inclination limiting structure, the deflection adjusting mechanism and the adjusting rod, a special-shaped steel structure can be clamped and limited at the right position; and the inclination direction and the inclination angle of the deformed steel structure can be adjusted according to the shape of the deformed steel structure, so that the deformed steel structure is conveniently limited, and the welding position of the deformed steel structure is conveniently aligned.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a limiting device for steel structure welding. Background Art

[0002] Steel structure welding limit structures refer to temporary or permanent auxiliary structures used in the steel structure welding process to ensure welding quality, control welding deformation and ensure the accuracy of welding joints. These structures can help fix and limit the position of welded parts, ensure the stability of the welding process and the geometric accuracy of the structure after welding. At present, when limiting the position of welded parts during welding, it is usually necessary to use a clamp to clamp and fix the welded parts, and then place the welding positions of the two welded parts together for welding.

[0003] In actual situations, most of the existing clamps are designed for clamping and limiting conventional steel structures. However, it will cause inconvenience when clamping and limiting special-shaped steel structures. For example, if the clamping position of the steel structure is special-shaped, the clamping may not be able to keep the weldment in the correct position during clamping. This may cause the welding positions of the two welded parts to be misaligned, affecting the quality of the welding. It is also inconvenient to adjust, and special clamps need to be specially customized and designed, which wastes processing time and increases design costs. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a limit device for steel structure welding.

[0005] The present invention provides a limit device for welding a steel structure, comprising a base, two telescopic support rods are slidably mounted on the base, the spacing between the two telescopic support rods is adjustable, a fixed seat is mounted on the output shaft of the telescopic support rod, a ball groove is provided on the fixed seat, a rotating ball is rotatably mounted in the ball groove, a connecting rod is fixedly connected to the rotating ball, a positioning block is fixedly mounted on one end of the connecting rod away from the rotating ball, a plurality of positioning telescopic rods are fixedly mounted on one side of the positioning block, the positioning telescopic rods are arranged in a matrix, a driving structure is also mounted on the positioning block, and the driving structure can drive the two rows of positioning telescopic rods on the two most sides to move closer to each other and clamp the steel structure; The fixing seat is provided with a tilt limiting structure and a deflection adjusting mechanism, the rotating ball is fixedly connected with an adjusting rod, the tilt limiting structure is used to adjust the tilt direction of the adjusting rod, and the deflection adjusting mechanism is used to adjust the tilt angle of the adjusting rod.

[0006] Preferably, the driving structure comprises two electric push rods and a reset member; a clamping slot slidably matched with the positioning telescopic rod is provided on the positioning block, a plurality of the positioning telescopic rods are slidably mounted in the clamping slot, the two electric push rods are respectively fixedly mounted on both sides of the positioning block, and the two electric push rods are respectively at the two ends of the clamping slot, the output shafts of the two electric push rods respectively slide through the positioning block and extend into the clamping slot, and the two outermost positioning telescopic rods in the clamping slot are respectively fixedly mounted on the output shafts of the two electric push rods; The reset member is used to drive the plurality of positioning telescopic rods to slide and reset in the clamping slide groove.

[0007] Preferably, a No. 1 guide rod and a No. 2 guide rod are fixedly installed in the clamping slot; the No. 1 guide rod and the No. 2 guide rod are arranged in parallel, and the No. 1 guide rod and the No. 2 guide rod both penetrate multiple positioning telescopic rods in the clamping slot.

[0008] Preferably, the reset member includes a plurality of diffusion springs; the plurality of diffusion springs are respectively located between two adjacent positioning telescopic rods, and hidden grooves are provided at both ends of the positioning telescopic rods. The two ends of the diffusion spring are respectively in the hidden grooves on the side close to the two adjacent positioning telescopic rods, and the diffusion spring can be received in the hidden grooves.

[0009] Preferably, the positioning telescopic rod comprises a sleeve, a telescopic rod and a reset spring; the sleeve is slidably mounted in the clamping slot, a telescopic hole is provided at the end of the sleeve for slidingly cooperating with the telescopic rod, one end of the telescopic rod is slidably mounted in the telescopic hole, the telescopic rod is located outside the clamping slot, the reset spring is located in the telescopic hole, and two ends of the reset spring are respectively located at the end inner wall of the telescopic hole and the end of the telescopic rod and are fixedly connected; The sleeve is slidably mounted on the first guide rod and the second guide rod.

[0010] Preferably, the tilt limiting structure comprises a rotating gear ring, a limiting sleeve, a limiting rod and a rotating assembly; a working cavity is provided in the positioning block, the I-shaped cavity is communicated with the ball groove, the rotating gear ring is rotatably mounted in the I-shaped cavity, the limiting sleeve is fixedly mounted on the inner ring wall of the rotating gear ring, an adjustment hole slidably matched with the limiting rod is provided at one end of the limiting sleeve away from the rotating gear ring, one end of the limiting rod is slidably mounted in the adjustment hole, a limiting hole is penetrated through the limiting rod, and the adjusting rod penetrates the limiting hole; The rotating assembly is used to drive the rotating gear ring to rotate on the positioning block.

[0011] Preferably, the rotating assembly comprises a rotating motor and a gear, the rotating motor is fixedly mounted on the positioning block, the gear is fixedly mounted on the output shaft of the rotating motor, and the gear is meshed with a rotating gear ring.

[0012] Preferably, the tilt adjustment structure includes an adjustment motor, an adjustment cover and an adjustment disk; the adjustment motor is fixedly mounted on the positioning block, the adjustment cover is located in the working chamber, and the adjustment cover is fixedly mounted on the output shaft of the adjustment motor, the adjustment disk is fixedly mounted on the adjustment cover, and a guide rail groove is provided on the adjustment disk, and the adjustment rod can slide in the guide rail groove.

[0013] Preferably, two electric slide rails are slidably mounted on the base, the distance between the two electric slide rails is adjustable, the two electric slide rails are arranged in parallel, and the two telescopic support rods are respectively fixedly mounted on the sliders of the two electric slide rails.

[0014] A limit device for steel structure welding proposed by the present invention has the following beneficial effects: through the arranged base, telescopic support rod, fixed seat, rotating ball, connecting rod, positioning block, positioning telescopic rod, driving structure, tilt limiting structure, deflection adjustment mechanism and adjusting rod, the special-shaped steel structure can be clamped and limited in a straight position, and the tilt direction and tilt angle of the special-shaped steel structure can be adjusted according to the shape of the special-shaped steel structure, thereby facilitating the limitation of the special-shaped steel structure and facilitating the alignment of the welding position of the special-shaped steel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of the overall structure of a limit device for steel structure welding.

[0016] Figure 2 The present invention provides a schematic structural diagram of different positions of a positioning block in a limiting device for steel structure welding.

[0017] Figure 3 The present invention provides a schematic structural diagram of a positioning telescopic rod on a positioning block in a limiting device for steel structure welding.

[0018] Figure 4 The present invention provides a cross-sectional view of a clamping slide groove at a positioning block in a limiting device for steel structure welding.

[0019] Figure 5 The present invention provides a side sectional view of a positioning block in a limiting device for steel structure welding.

[0020] Figure 6 The present invention provides a side sectional view of a fixing seat in a limiting device for steel structure welding.

[0021] Figure 7 The present invention provides a cross-sectional view of an inclination limiting structure in a limiting device for steel structure welding within a fixing seat.

[0022] Figure 8The present invention is a schematic structural diagram of a guide rail groove on an adjusting disk in a limit device for steel structure welding proposed by the present invention.

[0023] In the figure: 1. base; 2. telescopic support rod; 3. fixed seat; 4. rotating ball; 5. connecting rod; 6. positioning block; 7. positioning telescopic rod; 71. sleeve; 72. telescopic rod; 73. reset spring; 8. adjustment rod; 9. electric push rod; 10. No. 1 guide rod; 11. No. 2 guide rod; 12. diffusion spring; 13. rotating gear ring; 14. limit sleeve; 15. limit rod; 16. rotating motor; 17. gear; 18. adjustment motor; 19. adjustment cover; 20. adjustment disk; 21. guide rail groove; 22. electric slide rail. DETAILED DESCRIPTION

[0024] Reference Figure 1-Figure 8The present invention proposes a limit device for steel structure welding, comprising a base 1, two telescopic support rods 2 are slidably mounted on the base 1, the spacing between the two telescopic support rods 2 is adjustable, a fixed seat 3 is mounted on the output shaft of the telescopic support rod 2, a ball groove is provided on the fixed seat 3, a rotating ball 4 is rotatably installed in the ball groove, a connecting rod 5 is fixedly connected to the rotating ball 4, a positioning block 6 is fixedly mounted on one end of the connecting rod 5 away from the rotating ball 4, a plurality of positioning telescopic rods 7 are fixedly mounted on one side of the positioning block 6, a clamping groove slidably matched with the positioning telescopic rod 7 is provided on the positioning block 6, the number of the clamping grooves is two, and the positioning telescopic rod 7 includes a sleeve 71, Telescopic rod 72 and return spring 73; sleeve 71 is slidably installed in the clamping slot, and the end of sleeve 71 is provided with a telescopic hole that slidably cooperates with telescopic rod 72, one end of telescopic rod 72 is slidably installed in the telescopic hole, telescopic rod 72 is located outside the clamping slot, and return spring 73 is located in the telescopic hole, and the two ends of return spring 73 are respectively located at the end inner wall of the telescopic hole, and the end of telescopic rod 72 is fixedly connected, a plurality of mounting holes are provided on one side of positioning block 6, sleeve 71 is fixedly installed in the mounting hole, and telescopic rod 72 is located outside the mounting hole, the positioning telescopic rod 7 is arranged in a matrix, and a driving structure is also installed on the positioning block 6, and the driving structure can The telescopic rods 7 on the two sides are able to be driven to move toward each other and clamp the steel structure. In actual situations, part of the positioning telescopic rods 7 arranged in a matrix is ​​fixedly mounted on the positioning block 6, and the remaining part of the positioning telescopic rods 7 is divided into two rows and respectively located in two clamping slots. The two outermost rows of positioning telescopic rods 7 are respectively slidably mounted in the two clamping slots. When in use, the telescopic rod 72 in the middle of the two positioning telescopic rods 7 will be pressed against by the special-shaped steel structure and retracted into the telescopic hole. The telescopic rods 72 on both sides of the special-shaped steel structure that have not been squeezed and retracted are close to each other and clamp the special-shaped steel structure. When clamping the special-shaped steel structure, The clamping position of the special-shaped steel structure is against the end of the telescopic rod 72, so that part of the telescopic rod 72 is retracted into the telescopic hole, and another part of the telescopic rod 72 is located on both sides of the special-shaped steel structure and limits the centering position of the special-shaped steel structure. The driving structure then drives the two outermost rows of positioning telescopic rods 7 to squeeze each other, and the middle of the clamping position of the special-shaped steel structure is limited by the telescopic rod 72, and then the positioning telescopic rods 7 on both sides clamp and fix the two ends of the clamping position of the special-shaped steel structure. Most of the special-shaped steel structures can be clamped and fixed in the centering position. The operation is simple and convenient, and there is no need to design special clamps. The structure is simple and the operation is convenient.

[0025] like Figure 1 and Figure 2 As shown in , in actual situations, due to the different shapes of the special-shaped steel structures, when aligning the welding position of the special-shaped steel structures, the clamping orientation of the special-shaped steel structures needs to be different, so the orientation of the positioning block 6 on the fixing seat 3 is different.

[0026] like Figure 1, Figure 2 and Figure 6 As shown in the figure, a tilt limiting structure and a deflection adjustment mechanism are installed on the fixed seat 3, and an adjusting rod 8 is fixedly connected to the rotating ball 4. The tilt limiting structure is used to adjust the tilt direction of the adjusting rod 8, and the deflection adjustment mechanism is used to adjust the tilt angle of the adjusting rod 8. In actual situations, due to the shape characteristics of the special-shaped steel structure, it is necessary to adjust the tilt direction and tilt angle of the special-shaped steel structure when aligning the welding position. Therefore, a tilt limiting structure is required to limit the tilt direction of the special-shaped steel structure, and the deflection adjustment mechanism adjusts the tilt degree of the special-shaped steel structure in the tilt direction, so as to adjust the welding position of the special-shaped steel structure for alignment.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in, the driving structure includes two electric push rods 9 and a reset member; multiple positioning telescopic rods 7 are slidably installed in the clamping slide groove, the two electric push rods 9 are respectively fixedly installed on both sides of the positioning block 6, and the two electric push rods 9 are respectively at the two ends of the clamping slide groove, and the output shafts of the two electric push rods 9 slide through the positioning block 6 and extend into the clamping slide groove, and the two outermost positioning telescopic rods 7 in the clamping slide groove are respectively fixedly installed on the output shafts of the two electric push rods 9; the reset member is used to drive the multiple positioning telescopic rods 7 to slide and reset in the clamping slide groove. When clamping and limiting the special-shaped steel structure, four electric push rods 9 are required to work, driving the positioning telescopic rods 7 at the four end positions in the two clamping slide grooves to move close to each other in pairs, and clamping the special-shaped steel structure to limit the position, ensuring the position of the special-shaped steel structure, and facilitating the alignment of the welding position of the special-shaped steel structure.

[0028] like Figure 4 and Figure 5 As shown in the figure, a No. 1 guide rod 10 and a No. 2 guide rod 11 are fixedly installed in the clamping slot; the No. 1 guide rod 10 and the No. 2 guide rod 11 are arranged in parallel, and the No. 1 guide rod 10 and the No. 2 guide rod 11 both penetrate multiple positioning telescopic rods 7 in the clamping slot, and the sleeve 71 is slidably installed on the No. 1 guide rod 10 and the No. 2 guide rod 11. During use, in order to ensure that the positioning telescopic rod 7 in the clamping slot can slide stably, the No. 1 guide rod 10 and the No. 2 guide rod 11 limit the stable sliding of the sleeve 71 in the clamping slot, ensuring that the telescopic rod 72 on the positioning telescopic rod 7 can clamp and fix the special-shaped steel structure.

[0029] like Figure 4As shown in, the reset member includes multiple diffusion springs 12; the multiple diffusion springs 12 are respectively located between two adjacent positioning telescopic rods 7, and hidden grooves are provided at both ends of the positioning telescopic rods 7. The two ends of the diffusion spring 12 are respectively located in the hidden grooves on the side where the two adjacent positioning telescopic rods 7 are close to each other. The diffusion spring 12 can be received in the hidden grooves. After the special-shaped steel structure is clamped and limited, when the subsequent special-shaped steel structure is limited, the electric push rod 9 works to separate the positioning telescopic rods 7 at both ends of the two clamping slide grooves. At the same time, the rebound effect of the diffusion spring 12 disperses the squeezed and close positioning telescopic rods 7, so that the direction is adapted to the shape of the special-shaped steel structure. At the same time, when the positioning telescopic rods 7 are squeezed close to each other, the diffusion spring 12 will be hidden in the hidden grooves, thereby ensuring that the positioning telescopic rods 7 can be against each other, ensuring the clamping and limiting of the special-shaped steel structure.

[0030] like Figure 6 and Figure 7 As shown in, the tilt limiting structure includes a rotating gear ring 13, a limiting sleeve 14, a limiting rod 15 and a rotating assembly; a working cavity is provided in the positioning block 6, the I-shaped cavity is connected to the ball groove, the rotating gear ring 13 is rotatably installed in the I-shaped cavity, the limiting sleeve 14 is fixedly installed on the inner ring wall of the rotating gear ring 13, and the limiting sleeve 14 is provided with an adjustment hole that slidably cooperates with the limiting rod 15 at one end away from the rotating gear ring 13, and one end of the limiting rod 15 is slidably installed in the adjustment hole, and a limiting hole is penetrated through the limiting rod 15, and the adjusting rod 8 penetrates the limiting hole. The rotating assembly is used to drive the rotating gear ring 13 to rotate on the positioning block 6. When in use, the welding position of the steel structure is sometimes not the positive section of the steel structure, and another The shape of the external special-shaped steel structure may cause the welding position to be not in the correct position. Due to the shape characteristics of the special-shaped steel structure, when aligning the welding position of the steel structure, it is necessary to adjust the inclination direction and inclination angle of the steel structure. When it is necessary to limit the inclination direction of the steel structure, for example, it is necessary to adjust it to an upward tilt, the rotating gear ring 13 is driven by the rotating assembly to rotate, and the rotating gear ring 13 drives the limit sleeve 14 and the limit rod 15 to rotate synchronously when rotating, so that the limit sleeve 14 and the limit rod 15 are in a vertical state. Since the limit rod 15 can only telescope in the adjustment hole, the limit rod 15 can only move in the vertical direction, thereby limiting the inclination direction of the adjustment rod 8. It has a simple structure and is easy to operate.

[0031] like Figure 6 and Figure 7 As shown in the figure, the rotating assembly includes a rotating motor 16 and a gear 17. The rotating motor 16 is fixedly mounted on the positioning block 6, and the gear 17 is fixedly mounted on the output shaft of the rotating motor 16. The gear 17 is meshed with the rotating gear ring 13. In actual use, the rotating motor 16 works, and the output shaft of the rotating motor 16 drives the gear 17 to rotate. Since the rotating gear ring 13 is meshed with the gear 17, the gear 17 drives the rotating gear ring 13 to rotate on the positioning block 6, thereby controlling the movement direction of the limit sleeve 14 and the limit rod 15.

[0032] like Figure 1 , Figure 2 , Figure 6 and Figure 8 As shown in the figure, the tilt adjustment structure includes an adjustment motor 18, an adjustment cover 19 and an adjustment disk 20; the adjustment motor 18 is fixedly mounted on the positioning block 6, the adjustment cover 19 is located in the working chamber, and the adjustment cover 19 is fixedly mounted on the output shaft of the adjustment motor 18, and the adjustment disk 20 is fixedly mounted on the adjustment cover 19. When the adjustment disk 20 and the adjustment cover 19 are installed together, a cavity is formed between the adjustment disk 20 and the adjustment cover 19, and the end of the adjustment rod 8 can move in the cavity. A guide rail groove 21 is opened on the adjustment disk 20, and the guide rail is as shown in FIG. Figure 8 As shown in the figure, it can also be designed into other shapes. The adjusting rod 8 can slide in the guide rail groove 21. In the specific operation, when the tilting direction of the adjusting rod 8 is limited, the adjusting motor 18 works, and the output shaft of the adjusting motor 18 drives the adjusting cover 19 and the adjusting disk 20 to press Figure 8 The adjusting rod 8 is restricted by the limiting rod 15 and can only be rotated clockwise. Figure 8 The adjusting rod 8 moves in the C-shaped slide groove at the lower left position. Since the distances between the positions of the C-shaped groove and the center of the adjusting disk 20 are different, the inclination angle of the adjusting rod 8 is changed. When the adjusting motor 18 rotates in the opposite direction, the adjusting rod 8 will Figure 8 The adjusting rod 8 slides in the C-shaped groove at the upper right position in the middle, so as to control the tilt angle of the adjusting rod 8. The adjusting rod 8 has a simple structure, convenient operation and easy control.

[0033] like Figure 1 and Figure 2 As shown in the figure, two electric slide rails 22 are slidably installed on the base 1, the distance between the two electric slide rails 22 is adjustable, the two electric slide rails 22 are arranged in parallel, and the two telescopic support rods 2 are respectively fixedly installed on the sliders of the two electric slide rails 22. In the actual operation process, due to the different sizes of the special-shaped steel structures, in the actual operation, the electric slide rails 22 can slide on the base 1, and the movable telescopic support rod 2 slides on the electric slide rails 22, so as to make adjustments according to the actual situation. In addition, the telescopic support rod 2 can use existing technologies such as electric push rods and hydraulic rods, and the sliding action of the electric slide rail 22 on the base 1 is also driven by an electric linear slide rail.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A limit device for steel structure welding, characterized in that: The invention comprises a base (1), two telescopic support rods (2) are slidably mounted on the base (1), the spacing between the two telescopic support rods (2) is adjustable, a fixed seat (3) is mounted on the output shaft of the telescopic support rod (2), a ball groove is formed on the fixed seat (3), a rotating ball (4) is rotatably mounted in the ball groove, a connecting rod (5) is fixedly connected to the rotating ball (4), a positioning block (6) is fixedly mounted on one end of the connecting rod (5) away from the rotating ball (4), a plurality of positioning telescopic rods (7) are fixedly mounted on one side of the positioning block (6), the positioning telescopic rods (7) are arranged in a matrix, and a driving structure is also mounted on the positioning block (6), the driving structure can drive the two rows of positioning telescopic rods (7) on the two sides to move closer to each other and clamp the steel structure; The fixing seat (3) is provided with a tilt limiting structure and a deflection adjusting mechanism, and the rotating ball (4) is fixedly connected with an adjusting rod (8), the tilt limiting structure is used to adjust the tilt direction of the adjusting rod (8), and the deflection adjusting mechanism is used to adjust the tilt angle of the adjusting rod (8).

2. A limit device for steel structure welding according to claim 1, characterized in that: The driving structure comprises two electric push rods (9) and a reset member; a clamping slot slidably matched with the positioning telescopic rod (7) is provided on the positioning block (6); a plurality of the positioning telescopic rods (7) are slidably mounted in the clamping slot; the two electric push rods (9) are respectively fixedly mounted on both sides of the positioning block (6); and the two electric push rods (9) are respectively at two ends of the clamping slot; the output shafts of the two electric push rods (9) respectively slide through the positioning block (6) and extend into the clamping slot; and the two outermost positioning telescopic rods (7) in the clamping slot are respectively fixedly mounted on the output shafts of the two electric push rods (9); The reset member is used to drive the plurality of positioning telescopic rods (7) to slide and reset in the clamping slide groove.

3. A limit device for steel structure welding according to claim 2, characterized in that: A first guide rod (10) and a second guide rod (11) are fixedly installed in the clamping slide groove; the first guide rod (10) and the second guide rod (11) are arranged in parallel, and the first guide rod (10) and the second guide rod (11) both penetrate the plurality of positioning telescopic rods (7) in the clamping slide groove.

4. A limit device for steel structure welding according to claim 3, characterized in that: The reset member comprises a plurality of diffusion springs (12); the plurality of diffusion springs (12) are respectively located between two adjacent positioning telescopic rods (7); both ends of the positioning telescopic rods (7) are provided with hidden grooves; both ends of the diffusion springs (12) are respectively located in the hidden grooves on the sides close to the two adjacent positioning telescopic rods (7); and the diffusion springs (12) can be received in the hidden grooves.

5. A limit device for steel structure welding according to claim 1, characterized in that: The positioning telescopic rod (7) comprises a sleeve (71), a telescopic rod (72) and a return spring (73); the sleeve (71) is slidably mounted in the clamping slot, the end of the sleeve (71) is provided with a telescopic hole slidably matched with the telescopic rod (72), one end of the telescopic rod (72) is slidably mounted in the telescopic hole, the telescopic rod (72) is located outside the clamping slot, the return spring (73) is located in the telescopic hole, and the two ends of the return spring (73) are respectively located at the inner wall of the end of the telescopic hole and the end of the telescopic rod (72) and are fixedly connected; The sleeve (71) is slidably mounted on the first guide rod (10) and the second guide rod (11).

6. A limit device for steel structure welding according to claim 1, characterized in that: The tilt limiting structure comprises a rotating gear ring (13), a limiting sleeve (14), a limiting rod (15) and a rotating assembly; a working cavity is provided in the positioning block (6); the I-shaped cavity is communicated with the ball groove; the rotating gear ring (13) is rotatably mounted in the I-shaped cavity; the limiting sleeve (14) is fixedly mounted on the inner wall of the rotating gear ring (13); an adjustment hole slidably matched with the limiting rod (15) is provided at one end of the limiting sleeve (14) away from the rotating gear ring (13); one end of the limiting rod (15) is slidably mounted in the adjustment hole; a limiting hole is penetrated through the limiting rod (15); and the adjusting rod (8) penetrates through the limiting hole; The rotating assembly is used to drive the rotating gear ring (13) to rotate on the positioning block (6).

7. A limit device for steel structure welding according to claim 6, characterized in that: The rotating assembly comprises a rotating motor (16) and a gear (17); the rotating motor (16) is fixedly mounted on the positioning block (6); the gear (17) is fixedly mounted on the output shaft of the rotating motor (16); and the gear (17) is meshed with a rotating gear ring (13).

8. A limit device for steel structure welding according to claim 1, characterized in that: The tilt adjustment structure comprises an adjustment motor (18), an adjustment cover (19) and an adjustment disk (20); the adjustment motor (18) is fixedly mounted on the positioning block (6); the adjustment cover (19) is located in the working chamber and is fixedly mounted on the output shaft of the adjustment motor (18); the adjustment disk (20) is fixedly mounted on the adjustment cover (19); a guide rail groove (21) is formed on the adjustment disk (20); and the adjustment rod (8) is capable of sliding in the guide rail groove (21).

9. A limit device for steel structure welding according to claim 1, characterized in that: Two electric slide rails (22) are slidably mounted on the base (1); the distance between the two electric slide rails (22) is adjustable; the two electric slide rails (22) are arranged in parallel; and the two telescopic support rods (2) are respectively fixedly mounted on the sliders of the two electric slide rails (22).

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