Steel structure vertical frame auxiliary erecting and welding device

Abstract

The application belongs to the technical field of auxiliary equipment of automatic and semi-automatic electric arc welding and plasma arc welding, and discloses a steel structure stand auxiliary supporting and welding device, which comprises a base, one end of the base is fixed with a servo motor, the driving end of the servo motor is fixed with a bidirectional screw rod, and the top end of the lifting mechanism is installed with an auxiliary mechanism. The device can realize one-way limiting and position self-locking during the supporting process of the stand through the cooperation of the installation frame, the guide pulley, the one-way guide wheel and other structures, solves the problem that the stand is easy to deflect and fall off during automatic electric arc welding and semi-automatic plasma arc welding due to the lack of self-locking structure in the prior art, the one-way guide wheel rolls along the surface of the stand and only allows one-way rotation during the supporting process of the stand, the pawl is pushed away from the ratchet wheel when the reset spring is unlocked, and finally the effect of automatic locking and positioning after the supporting of the stand and preventing deflection and falling off during electric arc welding and plasma arc welding is achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of auxiliary equipment for automatic and semi-automatic electric arc welding and plasma arc welding, specifically a steel structure support welding device. Background Technology

[0002] In the field of steel structure manufacturing, automatic and semi-automatic electric arc welding and plasma arc welding are the most widely used metal cutting and welding processes. Automatic electric arc welding equipment completes continuous welding of the weld seam by automatically moving the welding torch, while semi-automatic plasma arc welding is completed by the operator holding the welding torch and moving it along the weld seam. Whether it is automatic electric arc welding or semi-automatic plasma arc welding, the welding quality is highly dependent on the positioning accuracy and clamping stability of the welded components. Especially in the process of welding vertical and horizontal weld seams at the junction of steel structure uprights and trusses, if the uprights deflect or tilt, it will directly cause the arc to deviate from the weld center, insufficient weld penetration, or poor weld formation, which will seriously affect the mechanical properties of the welded joint. Therefore, in the manufacturing process of metal cutting and welding equipment such as automatic and semi-automatic electric arc welding and plasma arc welding, auxiliary welding devices that reliably support and position the uprights are key process equipment to ensure welding quality.

[0003] Publication No. CN220427342U discloses a steel structure support welding device. The device includes an auxiliary plate. Two sliding grooves are opened on the top of one side wall of the auxiliary plate. A clamping component is provided on one side of the sliding groove. A reciprocating threaded groove is opened on the bottom of one side wall of the auxiliary plate. An adjustment component is provided at the bottom of the reciprocating threaded groove. The steel frame is fixed by the clamping component, so that the steel frame can be stably fixed on one side of the auxiliary plate and moved to the position to be welded.

[0004] This device can clamp and fix steel structure frames and assist in their erection, but its stability during erection is poor. Furthermore, the high stress on the reciprocating threaded rod increases the likelihood of damage and reduces the device's reliability. It also cannot adjust the support distance on both sides according to the size of different frame specifications, nor can it perform double-sided clamping during erection. The support height cannot be adjusted to accommodate welding requirements at different heights. Additionally, it lacks a self-locking structure, making the frame prone to deflection during welding. Therefore, a steel structure frame auxiliary erection and welding device is proposed, capable of double-sided clamping and fixing of frames of different specifications, adjustable support height, and auxiliary one-way locking. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides a steel structure support welding device.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a steel structure support welding device, comprising a base, a servo motor fixed to one end of the base, a bidirectional screw fixed to the drive end of the servo motor, a support seat connected to the external thread of the bidirectional screw, a lifting mechanism fixed to the top of the support seat, and an auxiliary mechanism mounted on the top of the lifting mechanism; the lifting mechanism includes a first mounting base, a first connecting rod, and a second connecting rod, the first mounting base being fixed to the top of the support seat, the first connecting rod being rotatably connected to the interior of the first mounting base, the second connecting rod being rotatably connected to the interior of the first mounting base, a first support block being hinged to one end of the first connecting rod, and a third connecting rod being hinged to one end of the first support block; the auxiliary mechanism includes a mounting frame, a guide pulley, and a unidirectional guide wheel, the mounting frame being hinged to the top of the third connecting rod, the guide pulley being rotatably connected to the interior of the mounting frame, and the unidirectional guide wheel being rotatably connected to the interior of the mounting frame.

[0007] Preferably, one end of the second connecting rod is hinged to a second support block, a handle is rotatably connected inside the first support block, one end of the second support block is hinged to a fourth connecting rod, a guide rod is slidably connected inside the third connecting rod, and a buffer spring is installed at one end of the guide rod.

[0008] Preferably, one end of the first connecting rod is fixed with teeth, one end of the second connecting rod is fixed with teeth, the first connecting rod and the second connecting rod are meshed together, and the first connecting rod and the second connecting rod are symmetrically distributed about the central axis of the first mounting base.

[0009] Preferably, one end of the handle is threaded to the second support block, the third link and the fourth link are meshed together, the top end of the fourth link is hinged to the mounting bracket, and the third link and the fourth link are symmetrically distributed about the central axis of the mounting bracket.

[0010] Preferably, four sets of guide rods and two sets of buffer springs are provided. The buffer springs are symmetrically distributed about the central axis of the guide rods. The buffer springs are used to compress the guide rods. The four sets of guide rods constrain the movement direction of the third link from four positions to ensure the straightness of the movement trajectory during the lifting process. The two sets of buffer springs are symmetrically distributed about the central axis of the guide rods. When the lifting is in place, they symmetrically compress the guide rods to absorb the impact and avoid the lifting mechanism from tilting due to unilateral force.

[0011] Preferably, a ratchet is fixed to one end of the unidirectional guide wheel, a pawl is rotatably connected to one end of the mounting bracket, a return spring is installed at one end of the pawl, a cylinder is fixed to one end of the mounting bracket, a guide block is fixed to the outside of the mounting bracket, a drive rod is slidably connected to the inside of the guide block, and a magnet is fixed to the top of the drive rod.

[0012] Preferably, two sets of guide pulleys are provided, and the guide pulleys are symmetrically distributed about the central axis of the mounting frame. Two sets of unidirectional guide wheels are also provided, and the unidirectional guide wheels are symmetrically distributed about the central axis of the mounting frame.

[0013] Preferably, the pawl and the ratchet are engaged, one end of the return spring is fixedly connected to the mounting bracket, and the other end of the return spring is fixedly connected to the pawl. The return spring is used to rotate the pawl.

[0014] Preferably, two sets of guide blocks are provided, the drive rod is fixed to the extension end of the cylinder, two sets of magnetic blocks are provided, and the magnetic blocks and pawls are magnetically connected.

[0015] Preferably, the inner wall of the support base fits against the outer wall of the base, the support base and the base are slidably connected, and two sets of support bases are provided, which are symmetrically distributed about the central axis of the base.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the combination of a mounting frame, guide pulleys, and unidirectional guide wheels, enables the device to achieve unidirectional limiting and self-locking during the erection process. This solves the problem in existing technologies where the lack of a self-locking structure leads to the easy deflection and detachment of the erection during automatic arc welding or semi-automatic plasma arc welding. During the erection process, the unidirectional guide wheel rolls along the surface of the erection and is only allowed to rotate in one direction. The guide pulley guides and limits the erection laterally to prevent deviation. The ratchet and pawl work together to lock the rotation direction of the unidirectional guide wheel, ensuring that the erection can only move forward and not backward. The cylinder drives the drive rod to move the guide block to the side of the erection and clamp it. The magnetic block adheres to the surface of the erection to provide auxiliary fixation. When unlocking, the return spring pushes the pawl to disengage from the ratchet. Ultimately, this achieves the effect of automatic locking and positioning of the erection after erection, preventing deflection and detachment during arc welding and plasma arc welding.

[0017] This invention, through the coordinated arrangement of a first mounting base, a first connecting rod, and a second connecting rod, enables the device to flexibly adjust the support height according to steel structure uprights of different heights. This solves the problem in existing technologies where the support component height is fixed and cannot adapt to uprights of different specifications. The operator drives the scissor linkage group, composed of the first and third connecting rods and the second and fourth connecting rods, to rotate around the first mounting base by pushing and pulling the lever, thereby realizing the overall unfolding or retraction of the lifting mechanism. The first and second support blocks provide limiting support at the hinge joint of the connecting rods. The guide rod guides and constrains the lifting movement in the vertical direction to ensure smooth movement. The buffer spring absorbs the impact when the lifting is in place to avoid rigid collisions. Ultimately, this invention achieves the effect of accurately adjusting and stably supporting uprights of different heights, meeting the different welding height requirements of automatic and semi-automatic electric arc welding and plasma arc welding. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 is a schematic diagram of the overall top structure of the present invention.

[0020] Figure 3 is a schematic diagram of the overall internal structure of the present invention.

[0021] Figure 4 is a partial enlarged cross-sectional view of point A in Figure 3 of the present invention. Figure 5 is a partial enlarged cross-sectional view of section B in Figure 4 of the present invention.

[0022] Figure 6 is a partial enlarged cross-sectional view of point C in Figure 4 of the present invention.

[0023] Figure 7 is a schematic diagram of the lifting mechanism of the present invention.

[0024] In the diagram: 1. Base; 2. Servo motor; 3. Bidirectional screw; 4. Support base; 5. Lifting mechanism; 501. First mounting base; 502. First connecting rod; 503. Second connecting rod; 504. First support block; 505. Second support block; 506. Hand lever; 507. Third connecting rod; 508. Fourth connecting rod; 509. Guide rod; 510. Buffer spring; 6. Auxiliary mechanism; 601. Mounting bracket; 602. Guide pulley; 603. One-way guide wheel; 604. Ratchet; 605. Pad; 606. Return spring; 607. Cylinder; 608. Guide block; 609. Drive rod; 610. Magnetic block. Detailed Implementation

[0025] 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.

[0026] As shown in Figures 1 to 7, the present invention provides a steel structure support welding device, including a base 1, a servo motor 2 fixed to one end of the base 1, a bidirectional screw 3 fixed to the drive end of the servo motor 2, a support seat 4 connected to the external thread of the bidirectional screw 3, a lifting mechanism 5 fixed to the top of the support seat 4, an auxiliary mechanism 6 installed at the top of the lifting mechanism 5, the inner wall of the support seat 4 fitting against the outer wall of the base 1, the support seat 4 and the base 1 being slidably connected, and two sets of support seats 4 being symmetrically distributed about the central axis of the base 1.

[0027] The above solution is adopted: by starting the servo motor 2 to drive the bidirectional screw 3 to rotate, the two sets of support seats 4 move in opposite directions, so that the top lifting mechanism 5 and auxiliary mechanism 6 move accordingly, thereby adjusting the position of supporting the steel structure frame.

[0028] As shown in Figures 1 to 7, the lifting mechanism 5 includes a first mounting base 501, a first connecting rod 502, and a second connecting rod 503. The first mounting base 501 is fixed to the top of the support base 4. The first connecting rod 502 is rotatably connected to the inside of the first mounting base 501, and the second connecting rod 503 is rotatably connected to the inside of the first mounting base 501. One end of the first connecting rod 502 is hinged to a first support block 504, one end of the first support block 504 is hinged to a third connecting rod 507, and one end of the second connecting rod 503 is hinged to a second support block 505. A handle 506 is rotatably connected inside the first support block 504, and a fourth connecting rod 508 is hinged to one end of the second support block 505. A guide rod 509 is slidably connected inside the third connecting rod 507, and a buffer spring 510 is installed at one end of the guide rod 509. Teeth are fixed at one end of the first connecting rod 502 and one end of the second connecting rod 503. The first link 502 and the second link 503 are engaged and connected. The first link 502 and the second link 503 are symmetrically distributed about the central axis of the first mounting base 501. One end of the handle 506 is threadedly connected to the second support block 505. The third link 507 and the fourth link 508 are engaged and connected. The top end of the fourth link 508 is hinged to the mounting bracket 601. The third link 507 and the fourth link 508 are symmetrically distributed about the central axis of the mounting bracket 601. Four sets of guide rods 509 are provided. Two sets of buffer springs 510 are provided. The buffer springs 510 are symmetrically distributed about the central axis of the guide rods 509. The buffer springs 510 are used to compress the guide rods 509.

[0029] The above solution is adopted: by rotating the lever 506, the first support block 504 and the second support block 505 move in opposite directions, thereby adjusting the angle between the first connecting rod 502, the second connecting rod 503, the third connecting rod 507 and the fourth connecting rod 508, and thus adjusting the height between the first mounting base 501 and the mounting bracket 601, thereby adjusting the height of the mounting bracket 601.

[0030] As shown in Figures 1 to 6, the auxiliary mechanism 6 includes a mounting frame 601, guide pulleys 602, and a one-way guide wheel 603. The mounting frame 601 is hinged to the top of the third connecting rod 507. The guide pulley 602 is rotatably connected inside the mounting frame 601. The one-way guide wheel 603 is rotatably connected inside the mounting frame 601. A ratchet 604 is fixed to one end of the one-way guide wheel 603. A pawl 605 is rotatably connected to one end of the mounting frame 601. A return spring 606 is installed at one end of the pawl 605. A cylinder 607 is fixed to one end of the mounting frame 601. A guide block 608 is fixed to the outside of the mounting frame 601. A drive rod 609 is slidably connected inside the guide block 608. A magnet 610 is fixed to the top of the drive rod 609. Two sets of guide pulleys 602 are provided, and the guide pulleys 602 are symmetrically distributed about the central axis of the mounting frame 601. The one-way guide wheel 603... Two sets of guide wheels 603 are provided, symmetrically distributed about the central axis of the mounting bracket 601. Pads 605 and ratchet wheels 604 are engaged. One end of the return spring 606 is fixedly connected to the mounting bracket 601, and the other end of the return spring 606 is fixedly connected to the pawl 605. The return spring 606 is used to rotate the pawl 605. Two sets of guide blocks 608 are provided. The drive rod 609 is fixed to the extension end of the cylinder 607. Two sets of magnetic blocks 610 are provided. The magnetic blocks 610 are magnetically connected to the pawl 605.

[0031] The above solution is as follows: the guide pulley 602 guides the steel structure frame, and the pawl 605 limits the ratchet 604, so that the ratchet 604 and the one-way guide wheel 603 can only rotate in one direction. When the one-way guide wheel 603 needs to rotate freely, the actuating cylinder 607 drives the drive rod 609 to move, so that the magnetic block 610 moves to the bottom of the pawl 605. Then, the magnetic force of the magnetic block 610 causes the pawl 605 to turn towards the magnetic block 610, thereby releasing the limitation on the ratchet 604. At this time, the one-way guide wheel 603 can rotate freely.

[0032] The working principle and usage process of this invention are as follows: During use, when performing metal cutting and welding operations such as automatic arc welding or semi-automatic plasma arc welding of steel structure frames, the base 1 is placed on the ground at the welding position of the steel structure frame. Based on the width of the steel structure frame, the servo motor 2 is started, driving the bidirectional screw 3 to rotate. The bidirectional screw 3 has two sections of threads with opposite directions of rotation on its exterior. Two sets of support seats 4 are threadedly connected to these two sections of threads. When the bidirectional screw 3 rotates, the two sets of support seats 4 move in opposite directions or backward along the base 1 under the action of the threaded transmission. The inner wall of the support seat 4 slides against the outer wall of the base 1, constraining the direction of movement of the support seat 4. After the two sets of support seats 4 move to a position suitable for the width of the steel structure frame, the servo motor 2 stops, and the distance between the two sets of support seats 4 is fixed. The lifting mechanism 5 and auxiliary mechanism 6 at the top of the support seat 4 move to the corresponding positions with the support seat 4, completing the adjustment of the support distance on both sides of the steel structure frame.

[0033] After the support distance is adjusted, rotate the lever 506 according to the height of the steel structure frame to be erected. The lever 506 is threadedly connected to the second support block 505. When the lever 506 rotates, it drives the first support block 504 and the second support block 505 to move in opposite directions along the axis of the lever 506. One end of the first connecting rod 502 is hinged to the inside of the first mounting base 501, and the other end is hinged to the first support block 504. One end of the second connecting rod 503 is hinged to the inside of the first mounting base 501, and the other end is hinged to the second support block 505. Both the first connecting rod 502 and the second connecting rod 503 have teeth fixed at one end and are meshed. When the first connecting rod 502 rotates, it drives the second connecting rod 503 to rotate synchronously in the opposite direction through the meshing of the teeth. The third connecting rod 507, which is hinged to the other end of the first support block 504, and the fourth connecting rod 508, which is hinged to the other end of the second support block 505, are also connected. With the same meshing connection and synchronous reverse rotation, when the first support block 504 and the second support block 505 move in opposite directions, the first connecting rod 502, the second connecting rod 503, the third connecting rod 507, and the fourth connecting rod 508 rotate around their respective hinge points. The included angle between the four sets of connecting rods changes, and the distance between the first mounting seat 501 and the mounting frame 601 changes accordingly. The height of the mounting frame 601 rises or falls. The guide rod 509, which is slidably connected inside the third connecting rod 507, guides and constrains the lifting movement in the vertical direction. The four sets of guide rods 509 restrict the movement direction of the third connecting rod 507 from four positions. The buffer spring 510 installed at one end of the guide rod 509 applies a compressive force to the guide rod 509 when the mounting frame 601 is raised to the position, absorbing the impact when the connecting rod moves to the position. After the height of the mounting frame 601 is adjusted to correspond to the part of the steel structure frame to be erected, the rotation of the lever 506 stops. The thread self-locking between the lever 506 and the second support block 505 keeps the lifting mechanism 5 Maintain the current height and complete the adjustment of the support height.

[0034] After the support height adjustment is completed, the steel structure frame is placed between the two sets of auxiliary mechanisms 6. The two sides of the steel structure frame contact the guide pulleys 602 and unidirectional guide wheels 603 inside the mounting brackets 601 on both sides, respectively. When the steel structure frame is lifted upward, the unidirectional guide wheel 603 rolls upward along the surface of the frame. The ratchet 604 fixed at one end of the unidirectional guide wheel 603 rotates synchronously with the unidirectional guide wheel 603. The pawl 605 rotatably connected to one end of the mounting bracket 601 slides over the teeth of the ratchet 604 one by one. One end of the return spring 606 is fixed to the mounting bracket 601, and the other end is fixed to the pawl 605. The return spring 606 continuously pushes the pawl 605 to maintain the engagement tendency with the ratchet 604. When the frame is continuously lifted upward, the unidirectional guide wheel 603 allows the frame to move upward. The two sets of guide pulleys 602 The upright is guided and limited on both sides to constrain lateral displacement during erection. After the upright is erected to the target position, if it tends to retract downwards under the action of gravity or external force, the pawl 605 engages with the tooth groove of the ratchet 604 under the push of the return spring 606, preventing the ratchet 604 from rotating in the opposite direction. The unidirectional guide wheel 603 cannot rotate in the opposite direction, and the upright is locked in the current position and cannot retract. The guide block 608 fixed externally to the mounting bracket 601 guides and constrains the movement direction of the drive rod 609. The upright remains stable in the locked state, and the operator can then perform automatic arc welding or semi-automatic plasma arc welding at the junction of the upright and the truss.

[0035] When the steel structure support needs to be released after automatic arc welding or semi-automatic plasma arc welding is completed, cylinder 607 is activated. The drive rod 609, fixed at the extended end of cylinder 607, moves along the inside of guide block 608 towards pawl 605. The magnetic block 610, fixed at the top of drive rod 609, moves to below pawl 605. The magnetic force between magnetic block 610 and pawl 605 overcomes the elasticity of return spring 606, attracting pawl 605 towards magnetic block 610 and causing it to rotate. Pawl 605 rotates around the hinge point on mounting bracket 601 and disengages from the tooth groove of ratchet 604. Ratchet 604 is released from rotation restriction, and unidirectional guide wheel 603 resumes bidirectional free rotation. The steel structure support can then move downwards and disengage from auxiliary mechanism 6. After cylinder 607 is closed, drive rod 609 drives magnetic block 610 back to its initial position. Magnetic block 610 moves away from pawl 605, the magnetic force disappears, and return spring 606... The pawl 605 is pushed back to engage with the ratchet 604, and the unidirectional guide wheel 603 resumes its unidirectional rotation. The device can then perform the next stand-up positioning and automatic arc welding or semi-automatic plasma arc welding operation.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] 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

1. A steel structure support welding device, comprising a base (1), characterized in that: One end of the base (1) is fixed with a servo motor (2), the drive end of the servo motor (2) is fixed with a bidirectional screw (3), the external thread of the bidirectional screw (3) is connected to a support seat (4), the top end of the support seat (4) is fixed with a lifting mechanism (5), and the top end of the lifting mechanism (5) is equipped with an auxiliary mechanism (6). The lifting mechanism (5) includes a first mounting base (501), a first connecting rod (502), and a second connecting rod (503). The first mounting base (501) is fixed to the top of the support base (4). The first connecting rod (502) is rotatably connected to the inside of the first mounting base (501). The second connecting rod (503) is rotatably connected to the inside of the first mounting base (501). One end of the first connecting rod (502) is hinged to a first support block (504), and one end of the first support block (504) is hinged to a third connecting rod (507). The auxiliary mechanism (6) includes a mounting frame (601), a guide pulley (602), and a one-way guide wheel (603). The mounting frame (601) is hinged to the top of the third connecting rod (507). The guide pulley (602) is rotatably connected to the inside of the mounting frame (601), and the one-way guide wheel (603) is rotatably connected to the inside of the mounting frame (601).

2. The steel structure support welding device according to claim 1, characterized in that: One end of the second link (503) is hinged to a second support block (505), the first support block (504) is rotatably connected to a handle (506), one end of the second support block (505) is hinged to a fourth link (508), the third link (507) is slidably connected to a guide rod (509), and one end of the guide rod (509) is equipped with a buffer spring (510).

3. The steel structure support welding device according to claim 1, characterized in that: One end of the first connecting rod (502) is fixed with teeth, and one end of the second connecting rod (503) is fixed with teeth. The first connecting rod (502) and the second connecting rod (503) are meshed together. The first connecting rod (502) and the second connecting rod (503) are symmetrically distributed about the central axis of the first mounting base (501).

4. The steel structure support welding device according to claim 2, characterized in that: One end of the lever (506) is threaded to the second support block (505), the third link (507) and the fourth link (508) are meshed together, the top end of the fourth link (508) is hinged to the mounting bracket (601), and the third link (507) and the fourth link (508) are symmetrically distributed about the central axis of the mounting bracket (601).

5. The steel structure support welding device according to claim 2, characterized in that: The guide rod (509) is provided in four sets, and the buffer spring (510) is provided in two sets. The buffer spring (510) is symmetrically distributed about the central axis of the guide rod (509). The buffer spring (510) is used to compress the guide rod (509).

6. The steel structure support welding device according to claim 1, characterized in that: One end of the unidirectional guide wheel (603) is fixed with a ratchet (604), one end of the mounting bracket (601) is rotatably connected with a pawl (605), one end of the pawl (605) is equipped with a return spring (606), one end of the mounting bracket (601) is fixed with a cylinder (607), a guide block (608) is fixed to the outside of the mounting bracket (601), a drive rod (609) is slidably connected inside the guide block (608), and a magnet (610) is fixed to the top of the drive rod (609).

7. The steel structure support welding device according to claim 1, characterized in that: Two sets of guide pulleys (602) are provided, and the guide pulleys (602) are symmetrically distributed about the central axis of the mounting frame (601). Two sets of unidirectional guide wheels (603) are provided, and the unidirectional guide wheels (603) are symmetrically distributed about the central axis of the mounting frame (601).

8. The steel structure support welding device according to claim 6, characterized in that: The pawl (605) and ratchet (604) are engaged. One end of the return spring (606) is fixedly connected to the mounting bracket (601), and the other end of the return spring (606) is fixedly connected to the pawl (605). The return spring (606) is used to rotate the pawl (605).

9. The steel structure support welding device according to claim 6, characterized in that: Two sets of guide blocks (608) are provided, the drive rod (609) is fixed to the extension end of the cylinder (607), two sets of magnetic blocks (610) are provided, and the magnetic blocks (610) and pawls (605) are magnetically connected.

10. The steel structure support welding device according to claim 1, characterized in that: The inner wall of the support base (4) is attached to the outer wall of the base (1). The support base (4) and the base (1) are slidably connected. There are two sets of support bases (4). The support bases (4) are symmetrically distributed about the central axis of the base (1).

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