Ship steel vertical ladder welding platform and using method thereof

Abstract

The invention relates to the technical field of ship and ocean engineering, in particular to a ship steel vertical ladder welding platform and a using method thereof. And square positioning holes are formed in the surface of the welding table and are used for inserting ladder columns. And a positioning assembly is arranged at the bottom of the ladder column and comprises a rotatable positioning block and a first driving assembly for driving the positioning block to rotate. The tops of the ladder columns are connected with the ladder frame plates in an inserted mode, and limiting holes and limiting grooves in a linear array are formed in the side walls of the ladder frame plates and used for inserting foot bars and cage protection rings respectively. And an adjusting table capable of transversely sliding is arranged in the middle of the welding table, is provided with a limiting mechanism, comprises a pair of limiting blocks capable of relatively sliding and a second driving assembly for driving the limiting blocks to move, and is used for clamping the middle of the foot bar. Manual operation is replaced by an automatic positioning and clamping mechanism, rapid and accurate positioning and stable fixing of key components such as ladder columns and foot bars are achieved, the welding efficiency is remarkably improved, manpower resources are saved, and meanwhile the welding precision and the product quality are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding and marine engineering technology, specifically to a steel straight ladder welding platform for ships and its usage method. Background Technology

[0002] As a fundamental and important vertical access facility, steel ladders are used in a wide range of applications beyond shipbuilding and marine engineering. They are also commonly found in the working and living environments of many industries, including chemical engineering, construction, energy, and municipal engineering. A typical steel ladder for ships mainly consists of the following core components: two ladder columns that serve as the main support structure (facilitating welding and fixing of the entire ladder to the hull), ladder frame plates (usually arranged in parallel intervals) for connecting and supporting the steps, multiple steps for personnel to step on (fixed between the ladder frame plates), and a safety cage (surrounding the step area) that provides safety protection for working at heights.

[0003] In existing technologies, the welding and assembly of such steel straight ladders typically requires a dedicated welding platform. The standard operating procedure is roughly as follows: First, operators move and lay out the necessary welding materials, including ladder columns, ladder frame plates, treads, and safety cages, on the welding platform. Next, at least two or more operators work together to manually and symmetrically straighten and erect multiple ladder columns, attempting initial positioning. After positioning, operators spot-weld or continuously weld the middle and end sections of the ladder frame plates to the ladder columns on both sides. Then, operators insert multiple treads one by one into the pre-drilled slots on the ladder frame plates, arranging them in a linear array, and then weld the connections between the treads and the ladder frame plates. Finally, operators lift the safety cage and place it over the top tread area, adjusting its position so that its bottom ends abut against the side walls of the ladder frame plates, and then weld the connections between the safety cage and the ladder frame plates or ladder columns.

[0004] However, the above traditional welding and assembly methods have significant drawbacks. First of all, the entire process highly depends on the close cooperation of multiple people (usually at least two or more), especially in the links of erecting the ladder column, positioning the ladder frame board, inserting the tread bar, and installing the safety cage. There are differences in the proficiency, tacit understanding, and physical conditions of the cooperation between operators, which can easily lead to time-consuming and laborious operations during the process, significantly reducing the overall efficiency of welding processing, and at the same time causing a waste of human resources. Secondly, and more critically, when welding key components (such as the ladder frame board and the ladder column, the tread bar and the ladder frame board, the safety cage and the ladder frame board), it mainly relies on the operator to hold by hand or use simple tools for assistance to fix. This manpower-dependent fixing method has poor stability and is extremely prone to relative displacement or skew between components during the welding process due to the slight shaking, fatigue, or distraction of the operator. This will not only directly affect the accuracy and quality of the welding joints (such as uneven welds, uneven gaps, angular deviations), causing potential welding defects and ultimately reducing the processing quality and structural reliability of the finished straight ladder, but also may increase the workload of subsequent correction. Summary of the Invention

[0005] The purpose of the present invention is to provide a welding platform for a ship's steel straight ladder and its usage method to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A welding platform for a ship's steel straight ladder and its usage method, including: a welding table and a support frame welded to the bottom of the welding table. A plurality of positioning holes are provided on the surface of the welding table, and the plurality of positioning holes are arranged in a square pattern. A ladder column is slidably inserted into the positioning holes. A positioning component is provided at the bottom of the ladder column. The positioning component includes a positioning block that can rotate inside and outside, and a first driving component for driving the positioning block to rotate inside and outside is provided at the bottom of the positioning block; The upper side of the ladder column is slidably inserted into the middle and both ends of the ladder frame board. A plurality of limiting holes and limiting grooves are provided on the side wall of the ladder frame board. The plurality of limiting holes and limiting grooves are arranged in a linear array. The limiting holes are slidably inserted with the tread bar, and the limiting grooves are slidably inserted with the bottom end of the safety cage ring; A horizontally slidable adjustment table is provided in the middle of the upper surface of the welding table. A limiting mechanism for limiting the middle of the tread bar is provided on the adjustment table. The limiting mechanism includes a group of limiting blocks that can slide relative to each other on the upper surface of the adjustment table, and a second driving component for driving the two limiting blocks to move relative to each other is connected to the lower side of the limiting blocks.

[0007] Preferably, the first driving component includes motors symmetrically arranged with respect to the support frame. The motors are embedded and fixedly installed at the bottom of the support frame. The output end of the motor is fixedly connected to one end of the threaded rod. The other end of the threaded rod is rotatably sleeved on the top of the fixed frame. Both sides of the bottom of the fixed frame are fixedly connected to the upper surface of the support frame. A connecting frame is threadedly sleeved on the threaded rod. The middle of the connecting frame is slidably sleeved in the large guiding column, and the end of the connecting frame is slidably sleeved in the small guiding column. The connecting frame is in the shape of a "king".

[0008] Preferably, the positioning component further includes a positioning platform, the lower surface of which is fixedly connected to the support frame, a small guide post fixedly connected to the bottom of the positioning platform, the top of the positioning platform and the positioning block being rotatably connected via a long pin shaft, connecting posts being arranged in a circular array around the small guide post, and the positioning block being arranged in a triangular arrangement about the top of the positioning platform.

[0009] Preferably, the bottom end of the connecting column is fixedly connected to the end of the connecting frame, the top end of the connecting column is fixedly connected to the lower surface of the connecting plate, the upper surface of the connecting plate is fixedly connected to the bottom end of the connecting rod, the top end of the connecting rod passes through the positioning platform and is rotatably connected to one end of the connecting plate through a short pin, and the other end of the connecting plate is rotatably connected to the bottom of the positioning block through a short pin.

[0010] Preferably, the bottom of the adjustment platform has sliding grooves on both sides, which are slidably connected to the slide rails fixedly connected to the upper surface of the welding platform. The top of the adjustment platform has stepped holes on both sides, and pins are slidably inserted into the stepped holes. The top of the pins is fixedly connected to the upper part of the stepped hole through a return spring. The bottom of the pins passes through the stepped hole and is slidably inserted into the grooves opened on the upper surface of the welding platform corresponding to the stepped hole positions. The upper surface of the adjustment platform has through grooves on both sides that are adapted to the pedal rod.

[0011] Preferably, the bottom two sides are provided with sliding grooves, which are slidably connected to the slide rail fixedly connected to the upper surface of the welding platform. The top two sides of the adjustment platform are provided with stepped holes, and pins are slidably inserted into the stepped holes. The top of the pins is fixedly connected to the upper part of the stepped hole through a return spring. The bottom of the pins passes through the stepped hole and is slidably inserted into the groove opened at the position of the stepped hole on the upper surface of the welding platform. The upper surface of the adjustment platform is provided with through grooves that are adapted to the step rod on both sides.

[0012] A method for using a steel straight ladder welding platform for ships includes the following steps: Preferably, the ladder column is placed through the positioning hole on the surface of the welding table, making it stand upright on the welding table. Then, driven by the first drive component, and in conjunction with the positioning component, the top of the positioning block rotates towards the ladder column until the positioning block clamps the ladder column, thereby fixing the ladder column in position. Next, the ladder frame plate is inserted into the top of the ladder column, and the ladder frame plate and the ladder column are welded and fixed. Then, the position of the adjustment table is adjusted, and the step rod is inserted into the ladder frame plate through the limiting hole. At the same time, the step rod passes through both sides of the adjustment table. Then, the second drive component drives the two limiting blocks to move in opposite directions, so that the step rod is clamped and limited by the adjustment table and the limiting blocks, thereby welding and fixing the step rod to the ladder frame plate. Finally, under the limitation of the limiting groove, the bottom of the protective cage ring is welded to the limiting groove.

[0013] Preferably, when the positioning block needs to be driven, the threaded rod is rotated by a motor, and the threaded rod drives the connecting frame to move under the limit of the large guide post and the small guide post, thereby realizing the lifting and lowering of the connecting frame along the axis of the threaded rod.

[0014] Preferably, the positioning platform supports each component of the positioning assembly. When the connecting frame rises, the positioning block can rotate inward, i.e., towards the ladder column, under the connecting action of the connecting column, connecting plate, and connecting rod, and in coordination with the rotation of the connecting plate, thereby realizing the positioning and fixing and releasing of the ladder column.

[0015] Preferably, after the ladder column is positioned, the middle and both ends of the ladder frame plate are welded and fixed to the ladder column. Then, the position of the adjustment platform can be adjusted by the cooperation of the slide groove and slide rail. The adjustment platform is limited and fixed by the insertion of the pin and the groove. Then, under the limit of the limit hole, the step rod is inserted and the step rod passes through the adjustment platform. Finally, driven by the second drive component, the two limit blocks move in opposite directions until the limit blocks press the step rod into the through groove. At this time, the step rod can be welded and fixed to the ladder frame plate. Finally, the bottom of the guard cage ring is welded to the limit groove through the limit groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By utilizing the pre-set positioning holes, positioning components, and adjustable limiting mechanisms on the welding platform, rapid and precise positioning and automatic clamping of core components such as ladder columns, ladder frame plates, and treadle rods are achieved. This design completely changes the traditional work mode that relies on multiple people working together to straighten, position, and fix the components, allowing the entire welding process to be completed efficiently by a single person. This significantly reduces manpower input and also significantly shortens the time for component assembly and positioning, thereby improving the overall welding processing efficiency.

[0017] 2. By utilizing mechanized positioning and clamping mechanisms (such as the triangular clamping of positioning blocks on the ladder columns and the stable clamping of limiting blocks on the treadles), manual support is replaced, eliminating human error and component wobbling caused by differences in operator coordination, physical exhaustion, or distraction. This stable fixing method ensures that key dimensions such as the verticality of the ladder columns, the spacing and parallelism of the treadles, and the position of the protective cage ring remain accurate throughout the welding process, fundamentally improving the quality of the welded joint and the overall structural integrity, and reducing the risk of welding defects.

[0018] 3. The welding platform integrates modular positioning, clamping, and adjustment functions (such as automatic opening and closing of the positioning components, sliding positioning of the adjustment platform, and synchronous drive of the middle limiting mechanism of the step rods), enabling the welding steps (ladder column fixing → ladder frame plate installation → step rod welding → cage welding) to proceed smoothly and orderly. The adjustability of the adjustment platform position and the adaptability of the limiting mechanism to clamp step rods of different sizes enhance the platform's compatibility with welding tasks of straight ladders of different specifications, simplify the operation steps, and further improve the standardization and flexibility of the processing flow. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the overall structure of the present invention; Figure 3 This is a top view of the overall structure of the present invention; Figure 4 This is a top view of the internal structure of the present invention; Figure 5 This is a top view of the internal structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point A in the middle; Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B; Figure 8 This is a bottom view of the internal structure of the present invention; Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point C.

[0020] In the diagram: 1. Welding table; 2. Support frame; 3. Positioning hole; 4. Ladder column; 5. Positioning block; 6. Ladder plate; 7. Limiting hole; 8. Limiting groove; 9. Step rod; 10. Guard ring; 11. Adjusting platform; 12. Limiting block; 13. Motor; 14. Threaded rod; 15. Fixing frame; 16. Connecting frame; 17. Large guide column; 18. Small guide column; 19. Positioning platform; 20. Connecting column; 21. Connecting plate; 22. Connecting rod; 23. Connecting plate; 24. Slide groove; 25. Slide rail; 26. Stepped hole; 27. Pin; 28. Return spring; 29. ​​Through groove; 30. Rotating shaft; 31. Rotating plate; 32. Arc rod; 33. Buffer spring; 34. Worm gear; 35. Worm; 36. Socket hexagonal groove; 37. Groove. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0022] Example 1: Please refer to Figures 1-9This invention provides a technical solution: a steel straight ladder welding platform for ships and its usage method, comprising: a welding table 1 and a support frame 2 welded to the bottom of the welding table 1, the support frame 2 providing stable support for the entire welding table 1; a plurality of positioning holes 3 are formed on the surface of the welding table 1, the plurality of positioning holes 3 being arranged in a square shape; a ladder column 4 is slidably inserted into the positioning holes 3, the positioning holes 3 being used for positioning the ladder column 4, thereby improving the positioning accuracy and positioning speed of the ladder column 4 and improving processing efficiency; a positioning component is provided at the bottom of the ladder column 4, the positioning component being used for limiting and positioning the ladder column 4; the positioning component includes a positioning block 5 that can rotate inward and outward, and a first driving component is provided at the bottom of the positioning block 5 for driving the positioning block 5 to rotate inward and outward. The upper side of column 4 is slidably inserted into the middle and both ends of ladder frame plate 6. Positioning grooves are provided on the top of the ladder column 4 at both ends and the middle, facilitating quick insertion and positioning of the ladder frame plate 6. Several limiting holes 7 and limiting grooves 8 are provided on the side wall of the ladder frame plate 6, arranged in a linear array. The limiting holes 7 are slidably inserted into the step rod 9, and the limiting grooves 8 are slidably inserted into the bottom end of the cage ring 10. A laterally slidable adjusting platform 11 is provided in the middle of the upper surface of the welding table 1. A limiting mechanism is provided on the adjusting platform 11 to limit the middle of the step rod 9. The limiting mechanism includes a set of limiting blocks 12 that can slide relative to each other on the upper surface of the adjusting platform 11. The lower side of each limiting block 12 is connected to a device for driving the relative movement of the two limiting blocks 12. The second drive component quickly positions the ladder column 4 through the positioning hole 3 on the surface of the welding table 1, allowing the ladder column 4 to quickly stand upright on the welding table 1. Then, driven by the first drive component, and in conjunction with the positioning component, the top 5 of the positioning block rotates inward, causing the positioning block 5 to rotate closer to the ladder column 4, until the three positioning blocks 5 clamp the ladder column 4, thus achieving rapid positioning and fixation of the ladder column 4, preventing the ladder column 4 from shaking during welding. Next, the ladder frame plate 6 is inserted into the positioning groove at the top of the ladder column 4, allowing for welding and fixation between the ladder frame plate 6 and the ladder column 4. Then, the position of the adjusting table 11 on the upper surface of the welding table 1 is adjusted, and the two ends of the step rod 9 are inserted into the ladder frame plate 6 through the limiting hole 7, making the step rod 9... Both ends of rod 9 are flush with the sides of ladder frame plate 6. At the same time, step rod 9 passes through both sides of adjustment platform 11. Then, the two limiting blocks 12 are driven by the second drive assembly to move in opposite directions, so that step rod 9 is clamped and limited by adjustment platform 11 and limiting blocks 12, preventing slight wobbling of step rod 9 in limiting hole 7. Thus, step rod 9 can be welded and fixed to ladder frame plate 6. Finally, under the limitation of limiting groove 8, the bottom of guard cage ring 10 is welded to limiting groove 8, thus completing the welding and assembly of the entire ladder. During the operation, no multiple people are required, saving manpower. It also avoids the trouble of low positioning or limiting accuracy of operators, thereby improving the accuracy and quality of subsequent welding joints and further improving processing efficiency.

[0023] The first driving component includes a motor 13 symmetrically arranged with respect to the support frame 2. The motor 13 is electrically connected to an external control device. The motor 13 is fixedly installed at the bottom of the support frame 2 in an embedded manner. One end of the output shaft of the motor 13 is fixedly connected to one end of a threaded rod 14. The other end of the threaded rod 14 is rotatably sleeved on the top of a fixed frame 15. The fixed frame 15 limits and supports the threaded rod 14, thereby improving its stability during rotation. Both sides of the bottom of the fixed frame 15 are fixedly connected to the upper surface of the support frame 2. A connecting frame 16 is threadedly sleeved on the threaded rod 14. The middle of the connecting frame 16 is slidably sleeved in a large guide post 17. The large guide posts 17 are arranged in a linear array with respect to the upper surface of the support frame 2. The end of the connecting frame 16 is slidably sleeved in a small guide post 18. The connecting frame 16 is in the shape of a Chinese character 'Wang'. When it is necessary to drive the positioning block 5, first, control the motor 13 to drive the threaded rod 14 to rotate. Due to the threaded fit between the threaded rod 14 and the connecting frame 16, the threaded rod 14 drives the connecting frame 16 to move under the limitation of the large guide post 17 and the small guide post 18, so as to realize the lifting of the connecting frame 16 along the axial direction of the threaded rod 14.

[0024] The positioning component further includes a positioning table 19. The lower surface of the positioning table 19 is fixedly connected to the support frame 2. The small guide post 18 is fixedly connected to the bottom of the positioning table 19. The top of the positioning table 19 is rotatably connected to the positioning block 5 through a long pin shaft. Connecting columns 20 are arranged in a circumferential array around the small guide post 18. The positioning block 5 is arranged in a triangular shape with respect to the top of the positioning table 19. The bottom ends of the connecting columns 20 are fixedly connected to the ends of the connecting frame 16. The top ends of the connecting columns 20 are fixedly connected to the lower surface of a connecting plate 21. The upper surface of the connecting plate 21 is fixedly connected to the bottom end of a connecting rod 22. The connecting plate 21 is slidably sleeved on the small guide post 18. The top end of the connecting rod 22 penetrates through the positioning table 19 and is rotatably connected to one end of a connecting plate 23 through a short pin shaft. The connecting rod 22 is slidably connected to the positioning table 19. The other end of the connecting plate 23 is rotatably connected to the bottom of the positioning block 5 through a short pin shaft. The positioning table 19 supports each component of the positioning component. When the connecting frame 16 rises, under the connection of the connecting columns 20 and the connecting plate 21, the connecting rod 22 is driven to move upward. The connecting rod 22 is rotatably connected to one end of the connecting plate 23, and the other end of the connecting plate 23 is rotatably connected to the bottom of the positioning block 5. Then, under the limitation of the positioning table 19, the positioning block 5 can rotate outward, that is, rotate away from the ladder column 4. On the contrary, when the connecting frame 16 moves downward, the positioning block 5 rotates towards the ladder column 4, thereby realizing the rapid positioning and fixing of the ladder column 4 and the release of the positioning, avoiding the trouble of multi-person operation and cooperation, and improving the subsequent welding processing efficiency.

[0025] The bottom of the adjustment platform 11 has sliding grooves 24 on both sides. The sliding grooves 24 are slidably connected to the slide rails 25 fixedly connected to the upper surface of the welding platform 1. The sliding cooperation between the slide rails 25 and the sliding grooves 24 facilitates the adjustment of the position of the adjustment platform 11. The top of the adjustment platform 11 has stepped holes 26 on both sides. A pin 27 is slidably inserted into the stepped hole 26. The top of the pin 27 is fixedly connected to the upper part of the stepped hole 26 by a return spring 28. The bottom of the pin 27 passes through the stepped hole 26 and is slidably inserted into a groove 37 on the upper surface of the welding platform 1 corresponding to the position of the stepped hole 26. The upper surface of the adjustment platform 11 has through grooves 29 on both sides that are adapted to the step rod 9. When it is necessary to adjust the position of the adjustment platform 11, the pin 27 is pulled upward, causing the bottom of the pin 27 to slide out of the groove 37. The pin 27 will stretch the return spring 28. At this time, the pin 27 releases the limit on the adjustment platform 11, so that the position of the adjustment platform 11 can be adjusted. After adjusting to the appropriate position, the pin is released. 27. Under the reverse elastic force of the return spring 28, the pin 27 is inserted into the groove 37, thereby fixing the adjusting platform 11. At this time, the step rod 9 can be sleeved in the limiting hole 7 and pass through the through groove 29, with both ends of the step rod 9 flush with the sides of the ladder frame plate 6. The through groove 29 limits the step rod 9. The adjusting platform 11 is rotatably sleeved with a rotating shaft 30 in the middle, and the adjusting platform 11 provides limiting support for the rotating shaft 30. A rotating plate 31 is fixedly sleeved on the upper side of the rotating shaft 30. Both ends of plate 31 are rotatably connected to one end of arc rod 32 via limiting pins. The other end of arc rod 32 is rotatably connected to limiting block 12 via limiting pins. A buffer spring 33 is fixedly connected between the two limiting blocks 12. A worm gear 34 is fixedly sleeved at the bottom of rotating shaft 30. A worm 35 is meshed on one side of worm gear 34. Both sides of worm 35 are rotatably sleeved at the bottom of adjusting platform 11. The bottom of adjusting platform 11 provides limiting support for worm 35. An internal hexagonal groove 36 is opened on one end face of worm 35.

[0026] After the ladder column 4 is positioned, the middle and both ends of the ladder frame plate 6 are welded and fixed to the ladder column 4. Then, the position of the adjusting platform 11 can be adjusted by the cooperation of the slide groove 24 and the slide rail 25. The adjusting platform 11 is fixed by the insertion of the pin 27 and the groove 37. Then, under the limit of the limiting hole 7, the step rod 9 is inserted and passes through the through groove 29 of the adjusting platform 11. At this time, a hex wrench is inserted into the internal hexagonal groove 36 and turned to drive the worm gear 35 to rotate. The worm gear 35 will then mesh with the worm wheel 34, which in turn drives the rotating shaft 30 to rotate inside the adjusting platform 11. The rotating shaft 30 then drives the rotating plate. Rotating plate 31, through the rotational cooperation of arc rod 32 and limit pin, can drive limit block 12 to slide on adjustment table 11. When the two limit blocks 12 move in opposite directions, the limit blocks 12 press the step rod 9 into the through groove 29. At this time, the step rod 9 can be welded and fixed to the ladder frame plate 6. At the same time, the two step rods 9 can be limited and fixed at one time, thereby improving processing efficiency. When the two limit blocks 12 move towards each other, the limitation on the step rod 9 can be released, which makes it easier to remove the ladder after subsequent welding. Finally, the bottom of the cage ring 10 is welded to the limit groove 8 one by one through the limit groove 8, and the welding process of the entire ladder is finally completed.

[0027] 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 straight ladder welding platform for ships, comprising a welding table (1) and a support frame (2) welded to the bottom of the welding table (1), characterized in that: The surface of the welding table (1) is provided with a plurality of positioning holes (3). The plurality of positioning holes (3) are arranged in a square shape. A trapezoidal column (4) is slidably inserted into the positioning hole (3). A positioning component is provided at the bottom of the trapezoidal column (4). The positioning component includes a positioning block (5) that can rotate inside and outside. A first driving component for driving the positioning block (5) to rotate inside and outside is provided at the bottom of the positioning block (5). The upper side of the trapezoidal column (4) is slidably inserted into the middle and both ends of the trapezoidal frame plate (6). A plurality of limiting holes (7) and limiting grooves (8) are provided on the side wall of the trapezoidal frame plate (6). The plurality of limiting holes (7) and limiting grooves (8) are both arranged in a linear array. The limiting hole (7) is slidably inserted with a tread bar (9), and the limiting groove (8) is slidably inserted with the bottom end of the safety cage ring (10). In the middle of the upper surface of the welding table (1), an adjustable table (11) that can slide horizontally is provided. A limiting mechanism for limiting the middle of the tread bar (9) is provided on the adjustable table (11). The limiting mechanism includes a group of limiting blocks (12) that can slide relative to each other on the upper surface of the adjustable table (11). A second driving component for driving the two limiting blocks (12) to move relative to each other is connected to the lower side of the limiting block (12).

2. The ship steel straight ladder welding platform according to claim 1, characterized in that: The first driving component includes motors (13) symmetrically arranged with respect to the support frame (2). The motors (13) are fixedly installed in an embedded manner at the bottom of the support frame (2). The output end of the motor (13) is fixedly connected to one end of a threaded rod (14). The other end of the threaded rod (14) is rotatably sleeved on the top of a fixed frame (15). Both sides of the bottom of the fixed frame (15) are fixedly connected to the upper surface of the support frame (2). A connecting frame (16) is threadedly sleeved on the threaded rod (14). The middle of the connecting frame (16) is slidably sleeved inside a large guide post (17). The end of the connecting frame (16) is slidably sleeved inside a small guide post (18). The connecting frame (16) is in the shape of a "king".

3. The ship steel straight ladder welding platform according to claim 1, characterized in that: The positioning component further includes a positioning table (19). The lower surface of the positioning table (19) is fixedly connected to the support frame (2). The small guide post (18) is fixedly connected to the bottom of the positioning table (19). The top of the positioning table (19) is rotatably connected to the positioning block (5) through a long pin shaft. Connecting columns (20) are arranged in a circumferential array around the small guide post (18). The positioning block (5) is arranged in a triangle with respect to the top of the positioning table (19).

4. A ship steel straight ladder welding platform according to claim 3, characterized in that: The bottom end of the connecting column (20) is fixedly connected to the end of the connecting frame (16). The top end of the connecting column (20) is fixedly connected to the lower surface of a connecting disc (21). The upper surface of the connecting disc (21) is fixedly connected to the bottom end of a connecting rod (22). The top end of the connecting rod (22) penetrates through the positioning table (19) and is rotatably connected to one end of a connecting plate (23) through a short pin shaft. The other end of the connecting plate (23) is rotatably connected to the bottom of the positioning block (5) through a short pin shaft.

5. A ship steel straight ladder welding platform according to claim 1, characterized in that: The adjustment platform (11) has sliding grooves (24) on both sides of the bottom. The sliding grooves (24) are slidably connected to the slide rails (25) fixedly connected to the upper surface of the welding platform (1). The adjustment platform (11) has stepped holes (26) on both sides of the top. A pin (27) is slidably inserted into the stepped hole (26). The top of the pin (27) is fixedly connected to the upper part of the stepped hole (26) through a return spring (28). The bottom of the pin (27) passes through the stepped hole (26) and is slidably inserted into the groove (37) on the upper surface of the welding platform (1) corresponding to the position of the stepped hole (26). The adjustment platform (11) has through grooves (29) on both sides of the upper surface that are adapted to the step rod (9).

6. A ship steel straight ladder welding platform according to claim 5, characterized in that: The middle part of the adjustment platform (11) is fitted with a rotating shaft (30), and a rotating plate (31) is fixedly fitted on the upper side of the rotating shaft (30). Both ends of the rotating plate (31) are rotatably connected to one end of the arc rod (32) through limit pins. The other end of the arc rod (32) is rotatably connected to the limit block (12) through limit pins. A buffer spring (33) is fixedly connected between the two limit blocks (12). A worm wheel (34) is fixedly fitted at the bottom of the rotating shaft (30). A worm (35) is meshed on one side of the worm wheel (34). Both sides of the worm (35) are rotatably fitted at the bottom of the adjustment platform (11). An internal hexagonal groove (36) is opened on one end face of the worm (35).

7. The method of using a ship steel straight ladder welding platform according to claim 6, characterized in that: Includes the following steps: The ladder column (4) is placed through the positioning hole (3) on the surface of the welding table (1) so that it stands upright on the welding table (1). Then, driven by the first drive component and in conjunction with the positioning component, the top (5) of the positioning block rotates towards the ladder column (4) until the positioning block (5) clamps the ladder column (4), thereby fixing the ladder column (4). Then, the ladder frame plate (6) is inserted into the top of the ladder column (4), and the ladder frame plate (6) and the ladder column (4) are welded and fixed. Then, the adjustment table (1) is adjusted. 1) Position: Insert the step rod (9) into the ladder frame plate (6) through the limiting hole (7). At the same time, the step rod (9) passes through both sides of the adjusting table (11). Then, the two limiting blocks (12) are driven to move in opposite directions through the second driving component, so that the step rod (9) is clamped and limited by the adjusting table (11) and the limiting block (12). Thus, the step rod (9) can be welded and fixed between the ladder frame plate (6). Finally, under the limitation of the limiting groove (8), the bottom of the cage ring (10) is welded to the limiting groove (8).

8. The method of using a ship steel straight ladder welding platform according to claim 7, characterized in that: When the positioning block (5) needs to be driven, the threaded rod (14) is driven to rotate by the motor (13). The threaded rod (14) then drives the connecting frame (16) to move under the limit of the large guide post (17) and the small guide post (18), thereby realizing the lifting and lowering of the connecting frame (16) along the axis of the threaded rod (14).

9. The method of using a ship steel straight ladder welding platform according to claim 8, characterized in that: The positioning platform (19) supports each component of the positioning assembly. When the connecting frame (16) rises, the positioning block (5) can rotate inward, i.e., towards the ladder column (4), under the connection of the connecting column (20), connecting plate (21), and connecting rod (22), and in coordination with the rotation of the connecting plate (23), the positioning block (5) can rotate inward. Conversely, it can rotate away from the ladder column (4), thereby achieving the positioning and fixing and release of the ladder column (4).

10. The method of using a ship steel straight ladder welding platform according to claim 9, characterized in that: After the ladder column (4) is positioned, the middle and both ends of the ladder frame plate (6) are welded and fixed to the ladder column (4). Then, the position of the adjustment platform (11) can be adjusted by the cooperation of the slide groove (24) and the slide rail (25). The adjustment platform (11) is fixed by the insertion of the pin (27) and the groove (37). Then, under the limit of the limit hole (7), the step rod (9) is inserted and the step rod (9) passes through the adjustment platform (11). Finally, the two limit blocks (12) are driven by the second drive component to move back to back until the limit block (12) presses the step rod (9) into the through groove (29). At this time, the step rod (9) can be welded and fixed to the ladder frame plate (6). Finally, the bottom of the cage ring (10) is welded to the limit groove (8) through the limit groove (8).

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