Steel structure welding operation platform

Abstract

The invention belongs to the technical field of welding equipment, and particularly relates to a steel structure welding operation platform which comprises an operation table and a lifting mechanism, a rectangular positioning groove is formed in the upper end of the operation table, and mounting grooves communicating with the positioning groove are formed in the four opposite angles of the operation table correspondingly; a plurality of supporting cylinders are arranged on the periphery of the upper end of the operation table, rollers are arranged on piston rods of the supporting cylinders, and the supporting cylinders can stretch out and enable the rollers to be located in the positioning grooves; the lifting mechanism comprises a driving motor, a lead screw and a nut sliding block, the lead screw is arranged in the mounting groove, the lead screw is connected with the nut sliding block in a matched mode, a connecting block is arranged on one side of the nut sliding block, an L-shaped supporting arm is arranged on the connecting block, and the supporting arm is arranged at the diagonal position of the positioning groove in a sliding mode; a rectangular frame structure formed by splicing a plurality of cross beams and longitudinal beams is arranged in the positioning groove in a matched mode. According to the structure, a plurality of repeated clamping, dismounting and mounting procedures are omitted, so that the splicing and welding precision of the frame structure is higher, and the welding quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding equipment, and in particular relates to a steel structure welding work platform. Background Art

[0002] At present, during the welding operation of the steel structure platform, steel structures with L-shaped, H-shaped or rectangular cross-sections are used as columns or beams according to structural requirements to carry out the welding operation of the steel structure platform.

[0003] In the installation and commissioning of power equipment, steel structure platforms are usually necessary, especially when large equipment or high-altitude operations are involved, such as: substation equipment installation, wind turbine installation, high-voltage power line erection, power system test equipment installation, etc.

[0004] In actual construction, steel structures will be welded at the construction site according to on-site needs. Since it is impossible to set up large-scale positioning and clamping equipment such as assembly machines and gantry cranes during on-site construction, construction workers are required to manually perform steel structure positioning and welding work; and since large-size steel structures will be divided into multiple frame structures for welding, and then welded in sequence, and finally combined into a steel structure platform for welding, they need to be disassembled and positioned repeatedly during positioning and clamping. Construction workers need to position, assemble and weld different frame structures. After each frame structure is welded, it needs to be unloaded and then assembled and welded to the next frame structure. Not only is the efficiency poor, but construction workers also have problems such as shaking during repeated clamping, unloading and moving, which affects the assembly and welding quality. Summary of the invention

[0005] In view of the technical problems existing in the background technology, the present invention provides a steel structure welding work platform, which is used to reduce the difficulty of positioning and welding large-size steel structures at the construction site, and improve welding efficiency and welding quality.

[0006] To achieve the above purpose, the technical solution provided by the present invention is:

[0007] A steel structure welding work platform comprises an operating table and a lifting mechanism, wherein a rectangular positioning groove is arranged on the upper end of the operating table, and mounting grooves connected to the positioning groove are respectively arranged at four diagonal corners of the operating table; a plurality of supporting cylinders are arranged around the upper end of the operating table, and rollers are arranged on the piston rods of the supporting cylinders, and the supporting cylinders can extend and position the rollers in the positioning grooves; the lifting mechanism comprises a driving motor, a screw rod and a nut slider, the screw rod is arranged in the mounting groove, the screw rod and the nut slider are cooperatively connected, a connecting block is arranged on one side of the nut slider, an L-shaped support arm is arranged on the connecting block, and the support arm is slidably arranged at the diagonal position of the positioning groove; a rectangular frame structure spliced ​​by a plurality of cross beams and longitudinal beams is cooperatively arranged in the positioning groove.

[0008] Optionally, an L-shaped guide block is provided in the center of the installation groove, and there is a gap between the two sides of the guide block and the inner wall of the installation groove; an L-shaped sliding groove is provided inside the connecting block, and the guide block is slidably set in the sliding groove.

[0009] Optionally, two avoidance grooves are arranged on the guide block at a fixed distance apart; the rectangular frame structure includes a rectangular bottom frame, a vertical beam and a rectangular top frame; the bottom end of the rectangular bottom frame is arranged close to the upper end surface of the support arm, the vertical beam is arranged close to the inner wall of the guide block, and the upper end surface of the rectangular top frame is arranged close to the bottom end surface of the roller; the two sides of the guide block are respectively an A end and a B end, the A end of the guide block is located at the bottom end of the mounting groove, the B end of the guide block is located at the top end of the mounting groove, the avoidance groove at the A end is opposite to the junction of the rectangular bottom frame and the vertical beam, and the avoidance groove at the B end is opposite to the junction of the rectangular top frame and the vertical beam.

[0010] Optionally, the rectangular bottom frame includes a first horizontal beam and a first longitudinal beam, vertical beams are arranged at the upper ends of both sides of the first horizontal beam, the outer wall at the junction of the first horizontal beam and the vertical beam has a first welding seam, and the avoidance groove at the A end faces the first welding seam; the rectangular top frame includes a second horizontal beam and a second longitudinal beam, vertical beams are arranged at the lower ends of both sides of the second horizontal beam, the outer wall at the junction of the second horizontal beam and the vertical beam has a second welding seam, and the avoidance groove at the B end faces the second welding seam.

[0011] Optionally, an inner wall at the junction of the first cross beam and the first longitudinal beam has a third welding seam.

[0012] Optionally, the inner walls of the four corners of the positioning groove are respectively provided with chamfers, so that when the rectangular top frame or the rectangular bottom frame is set in the positioning groove, there is a gap between the four corners of the positioning groove and the rectangular top frame or the rectangular bottom frame.

[0013] Optionally, an L-shaped through groove is provided on the inner wall of the guide block, and the through groove extends from the B end to the A end of the positioning block and extends to the avoidance groove position of the A end.

[0014] Optionally, the vertical beam is configured to be L-shaped, and an inner wall of the vertical beam has a limiting groove, and the vertical beam is arranged tightly against the four corners of the installation groove through the limiting groove.

[0015] Optionally, a connecting groove is provided on the operating table, the supporting cylinder is arranged in the connecting groove, and the end of the piston rod has a plug-in shaft; the outer walls around the operating table are respectively provided with limiting holes that are connected to the supporting cylinder; when the roller is located in the positioning groove, the plug-in shaft is plugged into the limiting hole.

[0016] The present invention has the following advantages and beneficial effects:

[0017] 1. The present invention provides a steel structure welding work platform, which is provided with a rectangular positioning groove at the upper end of the operating table, and installation grooves connected to the positioning groove are respectively provided at the four diagonal corners of the operating table. When welding the steel structure frame, the supporting cylinder can be extended and the roller is located in the positioning groove, and a plurality of cross beams and longitudinal beams are arranged in the positioning groove, and spliced ​​into a rectangular frame structure, that is, the positioning installation is completed, and the rectangular frame structure can be directly welded to form the rectangular frame structure. When the frame structure is welded, the welded rectangular frame structure can be lowered to the bottom through the lifting mechanism, and the welded frame structure does not need to be taken out, which saves this process; then the vertical beams connecting multiple rectangular frame structures are placed in the positioning groove for standby; and the supporting cylinder is continued to be extended to position and clamp the new rectangular frame structure and weld it. When the welding of multiple rectangular frame structures is completed, the multiple welded rectangular frame structures are lowered, and the vertical beams are fitted up and down to assemble and form a complete steel structure platform structure, and the lifting mechanism and the supporting cylinder are used to clamp and fix, and the entire steel structure platform is welded. After the welding is completed, the entire steel structure platform is lifted and taken out.

[0018] Second, this structure can be used to weld the steel structure platform in sequence without repeatedly clamping, disassembling and finally assembling the multiple frame structures that have been welded. Construction workers can avoid multiple clamping and directly position and weld the rectangular frame, which can greatly improve the efficiency of positioning, assembly and welding. In addition, since this structure eliminates multiple repeated clamping and disassembly processes, the accuracy of frame structure splicing is higher, thereby improving welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A structural diagram of the steel structure welding work platform provided by the present invention;

[0020] Figure 2 for Figure 1 Front view of

[0021] Figure 3 for Figure 2 A top view of

[0022] Figure 4 for Figure 2 Cross-sectional view along CC direction;

[0023] Figure 5 for Figure 4 A partial enlarged view of point a in the middle;

[0024] Figure 6 A structural diagram of the operating table provided by the present invention;

[0025] Figure 7 A cross-sectional view of the operating table provided by the present invention;

[0026] Figure 8 A structural diagram of the supporting cylinder and roller provided by the present invention;

[0027] Fig. 9 One of the structural diagrams of the nut slider and the support arm provided by the present invention;

[0028] Fig.10 The second structural diagram of the nut slider and the support arm provided by the present invention;

[0029] Fig.11 A front view of the guide block provided by the present invention;

[0030] Fig.12 for Fig.11 A top view of

[0031] Fig.13 for Fig.12 Left view of

[0032] Fig.14 A structural diagram of the guide block provided by the present invention;

[0033] Fig.15 A structural diagram of the steel structure platform provided by the present invention;

[0034] Fig.16 A cross-sectional view of the steel structure platform provided by the present invention;

[0035] Fig.17 A structural diagram of a steel structure positioning and clamping rectangular bottom frame provided by the present invention;

[0036] Fig.18 for Fig.17 A partial enlarged view of point b in the middle;

[0037] Fig.19 A structural diagram of a plurality of clamping vertical beams after welding of a rectangular bottom frame provided by the present invention;

[0038] Fig. 20 A structural diagram of a steel structure provided by the present invention for positioning and clamping a rectangular top frame, vertical beams and a rectangular bottom frame;

[0039] Fig.21 for Fig. 20 A partial enlarged view of point c in the middle;

[0040] Fig. 22 for Fig. 20 The local enlarged view at point d in the middle;

[0041] Fig.23 An isometric cross-sectional view of a rectangular top frame, a vertical beam and a rectangular bottom frame of a steel structure provided by the present invention for positioning and clamping;

[0042] Icons: 1-operating table, 11-positioning slot, 12-installing slot, 13-chamfer, 14-connecting hole one, 15-connecting hole two, 16-limiting hole, 17-fixing seat, 18-support, 19-connecting slot, 2-support cylinder, 21-piston rod, 22-roller, 23-plug-in shaft, 3-nut slider, 31-connecting block, 32-slide slot, 33-support arm, 4-guide block, 41-avoidance slot, 42-through slot, 5-drive motor, 51-screw, 6-welding gun, 7-steel structure platform, 71-first crossbeam, 72-first longitudinal beam, 73-vertical beam, 731-limiting slot, 74-second longitudinal beam, 75-second crossbeam, 76-third welding seam, 77-second welding seam, 78-first welding seam. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example 1

[0046] like Figures 1 to 7 As shown, a steel structure welding work platform includes an operating table 1 and a lifting mechanism. A rectangular positioning groove 11 is provided at the upper end of the operating table 1. The entire positioning groove 11 is arranged in a "Hu" shape to form a rectangular ring groove arranged on the operating table 1. The four diagonal corners of the operating table 1 are respectively provided with mounting grooves 12 connected to the positioning groove 11. The mounting groove 12 is a rectangular slot, which is opened from the four diagonal corners of the operating table 1 and directly connected to the positioning groove 11. A plurality of supporting cylinders 2 are arranged around the upper end of the operating table 1. Specifically: a connecting groove 19 is provided on the operating table 1, and the supporting cylinder 2 is arranged in the connecting groove 19. A roller 22 is arranged on the piston rod 21 of the supporting cylinder 2. The supporting cylinder 2 can extend and position the roller 22 in the positioning groove 11. As a preferred embodiment of the present invention, two supporting cylinders 2 are respectively arranged on each side of the connecting groove 19, and a total of eight supporting cylinders 2 are arranged to support the frame structure in the connecting groove 19.

[0047] A support 18 is provided at the bottom end of the operating platform 1 , a fixing seat 17 is provided at one side of the operating platform 1 , and a welding gun 6 is provided on the fixing seat 17 .

[0048] like Figures 1 to 7 As shown, the lifting mechanism includes a driving motor 5, a screw rod 51 and a nut slider 3. The screw rod 51 is arranged in the installation slot 12. Specifically, a connection hole 14 and a connection hole 2 15 are respectively arranged on the operating table 1 at the upper and lower ends of the installation slot 12. The two ends of the screw rod 51 are rotatably arranged in the connection hole 14 and the connection hole 2 15. The upper end of the screw rod 51 is connected to the driving motor 5 for transmission. The driving motor 5 is fixedly arranged on the upper part of the operating table 1. A total of four lifting mechanisms are arranged on the four diagonals for synchronous lifting. The screw rod 51 and the nut slider 3 are connected in a cooperative manner. A connecting block 31 is arranged on one side of the nut slider 3. The connecting block 31 is arranged in the installation slot 12. An L-shaped support arm 33 is arranged on the connecting block 31. The support arm 33 is slidably arranged at the diagonal position of the positioning slot 11 (such as Figure 5 As shown in the figure, the sliding limit function and the supporting function of the nut slider 3 are realized. When the driving motor 5 rotates, the nut slider 3 performs lifting movement, driving the support arm 33 to slide and lift along the four diagonal angles of the positioning groove 11. A rectangular frame structure composed of a plurality of cross beams and longitudinal beams is provided in the positioning groove 11, and the rectangular frame structure is supported in the limit groove 731 through the supporting cylinder 2 and the lifting mechanism.

[0049] The present invention provides a rectangular positioning groove 11 at the upper end of the operating table 1, and respectively provides installation grooves 12 connected to the positioning groove 11 at the four diagonals of the operating table 1. When welding the steel structure platform 7, the supporting cylinder 2 can be extended and the roller 22 can be located in the positioning groove 11. A plurality of cross beams and longitudinal beams are arranged in the positioning groove 11 and spliced ​​into a rectangular frame structure. The positioning installation is completed and can be directly welded to form a rectangular frame structure. When the frame structure is welded, the lifting mechanism (support arm 33) can be used to control the support arm 33 to rise and support the welded rectangular frame structure, and then the supporting cylinder 2 can be retracted to lower the welded rectangular frame structure to the bottom for storage, without taking it out from the operating table 1, and there is no need to take out the welded frame structure, thus eliminating this process; then the vertical beam 73 connecting multiple rectangular frame structures is placed in the four diagonal corners of the positioning groove 11 for standby use; and the supporting cylinder 2 is continued to be extended to position and clamp the new rectangular frame structure and weld it. When the welding of multiple rectangular frame structures is completed, the rectangular frame structure on the support arm 33 is controlled to rise, so that the rectangular frame structures at the upper and lower ends fit the vertical beam 73 up and down, and then the complete steel structure platform 7 structure can be assembled and formed, and the lifting mechanism and the supporting cylinder 2 are used to clamp and fix it, and then the entire steel structure platform 7 is welded. After the welding is completed, the entire steel structure platform 7 can be lifted and taken out.

[0050] This structure can be used to weld the steel structure platform 7 in sequence without repeatedly clamping, disassembling, and finally assembling the multiple frame structures that have been welded. Construction workers can avoid multiple clamping and directly position and weld the rectangular frame, which can greatly improve the efficiency of positioning, assembly, and welding. In addition, since this structure eliminates multiple repeated clamping and disassembly processes, the accuracy of frame structure splicing is higher, thereby improving welding quality.

[0051] Preferably, the connecting block 31 is a rectangular block, and its two sides are respectively close to the side walls of the mounting groove 12 for sliding and limiting (such as Figure 5 As shown), the lifting and guiding accuracy of the entire device can be enhanced.

[0052] Example 2

[0053] In this embodiment, based on the embodiment 1, the structure of the operating platform 1 is further optimized to facilitate welding and fixing of the spliced ​​steel structure frame, thereby increasing welding efficiency and reducing labor intensity.

[0054] like Figures 1 to 7 , 9 to 14, further, an L-shaped guide block 4 is arranged in the center of the mounting groove 12, and the guide block 4 is arranged on the inner side of the mounting groove 12, and there is a gap between the two sides of the guide block 4 and the inner wall of the mounting groove 12; an L-shaped slide groove 32 is arranged inside the connecting block 31, and the guide block 4 is slidably arranged in the slide groove 32. Such a design further increases the accuracy of the lifting guide through the sliding limit of the guide block 4 and the connecting hole.

[0055] Reference Figure 5 The guide block 4 is set to be L-shaped, and its inner wall position is the outer wall position of the support arm 33, that is, the inner wall of the guide block 4 and the outer wall of the support arm 33 overlap each other in the projection direction, and the purpose of this is to locate and limit the vertical beam 73. When one of the rectangular frame structures is welded and set on the support arm 33 and stored at the bottom of the positioning groove 11, the vertical beam 73 can be placed. The vertical beam 73 is located at the four diagonal corners of the positioning groove 11, and the outer side of the vertical beam 73 slides and fits on the inner wall of the guide block 4 to achieve precise positioning.

[0056] like Figures 1 to 7As shown in , 9 to 23, two avoidance grooves 41 are arranged on the guide block 4 at a fixed distance. The steel structure frame includes a rectangular bottom frame, a vertical beam 73 and a rectangular top frame; the bottom end of the rectangular bottom frame is arranged close to the upper end surface of the support arm 33, the outer wall of the vertical beam 73 is arranged close to the inner wall of the guide block 4, and the upper end surface of the rectangular top frame is arranged close to the bottom end surface of the roller 22. The two sides of the guide block 4 are the A end and the B end respectively. The A end of the guide block 4 is located at the bottom end of the installation groove 12, and the B end of the guide block 4 is located at the top end of the installation groove 12. The avoidance groove 41 at the A end is directly opposite to the intersection of the rectangular bottom frame and the vertical beam 73, and the avoidance groove 41 at the B end is directly opposite to the intersection of the rectangular top frame and the vertical beam 73, so as to facilitate welding operations through the avoidance groove 41.

[0057] Further, the rectangular bottom frame includes a first cross beam 71 and a first longitudinal beam 72, the two first cross beams 71 and the first longitudinal beam 72 together form a rectangular bottom frame, the upper ends of both sides of the first cross beam 71 are provided with vertical beams 73, the outer wall at the junction of the first cross beam 71 and the vertical beam 73 has a first welding seam 78, and the avoidance groove 41 at the A end faces the first welding seam 78; the rectangular top frame includes a second cross beam 75 and a second longitudinal beam 74, the two second cross beams 75 and the second longitudinal beam 74 together form a rectangular top frame, the bottom ends of both sides of the second cross beam 75 are provided with vertical beams 73, and the rectangular bottom frame and the rectangular top frame are connected as a whole by four vertical beams 73 to form a steel structure frame structure. The outer wall at the junction of the second cross beam 75 and the vertical beam 73 has a second welding seam 77, and the avoidance groove 41 at the B end faces the second welding seam 77.

[0058] Furthermore, inner walls of the junctions between the first cross beam 71 and the first longitudinal beam 72 and between the second cross beam 75 and the second longitudinal beam 74 respectively have third welding seams 76 .

[0059] Principles and steps of steel structure frame positioning welding:

[0060] 1. Reference Fig.17 , 18 As shown, at this time, the rectangular bottom frame is positioned, the first cross beam 71 and the second longitudinal beam 74 are positioned and placed in the positioning groove 11, the supporting cylinder 2 is extended, the roller 22 is located in the positioning groove 11, and the rectangular bottom frame is supported by the roller 22 of the supporting cylinder 2, that is, the positioning and fixing function is achieved. In this case, welding can be performed at the inner wall at the junction of the first cross beam 71 and the first longitudinal beam 72, that is, the third welding seam 76, and finally the rectangular bottom frame is welded and fixed as a whole.

[0061] 2. After the rectangular bottom frame is welded together, the nut slider 3 is controlled to rise, so that the support arm 33 rises and supports the rectangular bottom frame. Then the supporting cylinder 2 contracts and the roller 22 is contracted into the connecting groove 19 and away from the positioning groove 11. The nut slider 3 can be controlled to descend and the rectangular bottom frame is lowered and stored at the bottom of the positioning groove 11.

[0062] 3. Then, if Fig.19 As shown, four vertical beams 73 are placed at the four diagonal positions of the positioning groove 11 so that the outer walls of the vertical beams 73 are closely attached to the inner walls of the guide block 4 for guidance until the vertical beams 73 are completely placed in the positioning groove 11 .

[0063] Fourth, after the vertical beam 73 is completely placed in the positioning groove 11, continue to control the supporting cylinder 2 to extend so that the roller 22 is located in the positioning groove 11, and then put in the second cross beam 75 and the second longitudinal beam 74, support and splice them into a rectangular top frame in the positioning groove 11, and weld them on the inner wall at the junction of the second cross beam 75 and the second longitudinal beam 74, that is, the third welding seam 76, and finally weld and fix the rectangular top frame into one.

[0064] 5. After the rectangular top frame is welded, the nut slider 3 is controlled to rise, and the support arm 33 is raised to drive the rectangular bottom frame and the vertical beam 73 to rise, until the upper end of the vertical beam 73 is close to the bottom wall of the rectangular top frame, and the steel structure platform 7 is spliced, and then the supporting cylinder 2 is controlled to shrink; when the supporting cylinder 2 shrinks, the nut slider 3 is controlled to fall, so that the steel structure platform 7 (rectangular bottom frame, vertical beam 73, rectangular top frame) falls as a whole, and when the rectangular top frame falls, the supporting cylinder 2 is controlled to extend again, and at this time the roller 22 is located above the rectangular top frame, and then the support arm 33 is controlled to rise again, so that the rectangular top frame abuts against the bottom of the roller 22 (such as Fig.23 As shown), the entire steel structure platform 7 is completely limited and fixed, and then the welding operation can be carried out to weld the entire steel structure platform 7 into one.

[0065] like Figures 20-23 As shown, when the steel structure frame is completely fixed, the avoidance groove 41 at the A end is arranged opposite to the first welding seam 78, and the avoidance groove 41 at the B end is arranged opposite to the second welding seam 77. The purpose of such design is to extend the welding gun 6 through the upper and lower avoidance grooves 41, perform welding operations on the first welding seam 78 and the second welding seam 77, and weld the vertical beam 73 and the rectangular top frame, as well as the vertical beam 73 and the rectangular bottom frame into one, thereby realizing the preliminary welding and fixing of the entire steel structure platform 7.

[0066] 5. After the initial welding of the entire steel structure platform 7 is completed, the supporting cylinder 2 is retracted and released, and the support arm 33 is gradually controlled to rise, so that the entire steel structure platform 7 gradually extends upward from the positioning groove 11. During the rising process of the steel structure platform 7, the welding gun 6 is used to perform repair welding on each connection position of the steel structure platform 7, from top to bottom, the connection position between the rectangular top frame and the vertical beam 73, and the connection position between the vertical beam 73 and the rectangular bottom frame, until all the positions that need to be welded and strengthened are welded for the second time, and then the steel structure platform 7 can be removed from the operating table 1.

[0067] This structure and clamping and welding method further optimize the structure of the operating platform 1, facilitate the precise positioning, clamping and welding of the spliced ​​steel structure platform 7, increase welding efficiency and reduce labor intensity, fix the overall frame structure through preliminary welding after clamping, and after the overall frame structure is welded and formed, gradually rise away from the positioning groove 11, and perform secondary welding reinforcement, thereby improving welding efficiency and welding quality.

[0068] Example 3

[0069] like Figure 5 , 6 As shown in FIGS. 7 and 18, further, the inner walls of the four corners of the positioning groove 11 are respectively provided with chamfers 13, so that when the rectangular top frame or the rectangular bottom frame is set in the positioning groove 11, there is a gap between the four corners of the positioning groove 11 and the rectangular top frame or the rectangular bottom frame. The purpose of this is that the inner walls at the intersection of the first crossbeam 71 and the first longitudinal beam 72 and the second crossbeam 75 and the second longitudinal beam 74 respectively have a third welding seam 76, so as not to affect the lifting and lowering of the rectangular bottom frame and the rectangular top frame in the positioning groove 11, and to avoid interference between the welding meat at the third welding seam 76 and the inner wall of the operating table 1, thereby chamfering 13 is performed to ensure that the rectangular top frame and the rectangular bottom frame can be smoothly lifted and lowered in the positioning groove 11 after welding.

[0070] like Figures 11 to 14 , 20 to 23, further, the inner wall of the guide block 4 is provided with an L-shaped through groove 42, which extends from the B end to the A end of the positioning block, and extends to the position of the avoidance groove 41 at the A end. The purpose of this design is that when welding at the avoidance groove 41, weld meat will be formed at the first welding seam 78 and the second welding seam 77. Therefore, in order to ensure that the steel structure platform 7 can be raised and lowered in the positioning groove 11 after welding, the through groove 42 is provided, so that the steel structure platform 7 can be accurately guided to rise and fall, and the weld meat will not collide and interfere with the inner wall of the guide block 4 and the inner wall of the positioning groove 11.

[0071] like Fig.16 , 19 As shown, further, the vertical beam 73 is set to be L-shaped, and the inner wall of the vertical beam 73 has a limiting groove 731. The vertical beam 73 is set close to the four corners of the installation groove 12 through the limiting groove 731, so as to further strengthen the limitation. The outer wall of the vertical beam 73 is close to the inner wall of the positioning block, and the limiting groove 731 of the inner wall of the vertical beam 73 is close to the four corners of the installation groove 12, so that the vertical beam 73 is only allowed to rise and fall in the positioning groove 11, so as to avoid the vertical beam 73 and the rectangular bottom frame from tipping over when being spliced. This structure also enhances the connection accuracy of the entire frame structure, thereby ensuring the welding quality.

[0072] like Figure 6 , 823, further, the end of the piston rod 21 has a plug-in shaft 23; the outer walls of the operating table 1 are respectively provided with limiting holes 16 that are connected to the supporting cylinder 2; when the roller 22 is located in the positioning groove 11, the plug-in shaft 23 is plugged into the limiting hole 16. Such a design can further enhance the supporting strength of the supporting cylinder 2 and ensure that the frame structure can support sufficient weight.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steel structure welding work platform, characterized in that :Including operating platform and lifting mechanism, A rectangular positioning groove is provided at the upper end of the operating table, and four diagonal corners of the operating table are respectively provided with mounting grooves connected to the positioning groove; A plurality of supporting cylinders are arranged around the upper end of the operating table, and rollers are arranged on the piston rods of the supporting cylinders. The supporting cylinders can extend and place the rollers in the positioning grooves. The lifting mechanism includes a driving motor, a screw rod and a nut slider, wherein the screw rod is arranged in a mounting groove, the screw rod and the nut slider are connected in cooperation, a connecting block is arranged on one side of the nut slider, an L-shaped support arm is arranged on the connecting block, and the support arm is slidably arranged at a diagonal position of the positioning groove; The positioning groove is provided with a rectangular frame structure composed of a plurality of cross beams and longitudinal beams.

2. The steel structure welding work platform according to claim 1 is characterized in that: An L-shaped guide block is arranged in the center of the installation groove, and there is a gap between the two sides of the guide block and the inner wall of the installation groove; an L-shaped sliding groove is arranged inside the connecting block, and the guide block is slidably arranged in the sliding groove.

3. The steel structure welding work platform according to claim 2 is characterized in that: Two avoidance grooves are arranged on the guide block at a fixed distance; the rectangular frame structure includes a rectangular bottom frame, a vertical beam and a rectangular top frame; the bottom end of the rectangular bottom frame is arranged close to the upper end surface of the support arm, the vertical beam is arranged close to the inner wall of the guide block, and the upper end surface of the rectangular top frame is arranged close to the bottom end surface of the roller; the two sides of the guide block are respectively an A end and a B end, the A end of the guide block is located at the bottom end of the mounting groove, the B end of the guide block is located at the top end of the mounting groove, the avoidance groove at the A end is opposite to the junction of the rectangular bottom frame and the vertical beam, and the avoidance groove at the B end is opposite to the junction of the rectangular top frame and the vertical beam.

4. The steel structure welding work platform according to claim 3 is characterized in that: The rectangular bottom frame includes a first horizontal beam and a first longitudinal beam, vertical beams are arranged at the upper ends of both sides of the first horizontal beam, the outer wall at the junction of the first horizontal beam and the vertical beam has a first welding seam, and the avoidance groove located at the A end faces the first welding seam; the rectangular top frame includes a second horizontal beam and a second longitudinal beam, vertical beams are arranged at the lower ends of both sides of the second horizontal beam, the outer wall at the junction of the second horizontal beam and the vertical beam has a second welding seam, and the avoidance groove located at the B end faces the second welding seam.

5. The steel structure welding work platform according to claim 4 is characterized in that: An inner wall at a junction of the first transverse beam and the first longitudinal beam has a third welding seam.

6. The steel structure welding work platform according to claim 5, characterized in that: The inner walls of the four corners of the positioning groove are respectively provided with chamfers, so that when the rectangular top frame or the rectangular bottom frame is arranged in the positioning groove, there is a gap between the four corners of the positioning groove and the rectangular top frame or the rectangular bottom frame.

7. The steel structure welding work platform according to claim 5, characterized in that: The inner wall of the guide block is provided with an L-shaped through groove, and the through groove extends from the B end to the A end of the positioning block and extends to the avoidance groove position of the A end.

8. The steel structure welding work platform according to claim 5, characterized in that: The vertical beam is arranged in an L shape, and the inner wall of the vertical beam has a limiting groove, and the vertical beam is arranged closely to the four corners of the installation groove through the limiting groove.

9. The steel structure welding work platform according to claim 5, characterized in that: The operating table is provided with a connecting groove, the supporting cylinder is arranged in the connecting groove, and the end of the piston rod The operating table has a plug-in shaft; the outer walls around the operating table are respectively provided with limiting holes for docking with the supporting cylinder; When the roller is located in the positioning groove, the plug-in shaft is plugged into the limiting hole.

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