A steel bar welding device for building construction

Abstract

The present invention relates to the field of welding technology, specifically to a steel bar welding device for construction, comprising a main frame, a lower clamping part arranged at the bottom of the main frame and an upper clamping part movably arranged on the outer surface of the main frame, a top plate arranged at the top of the main frame, the top of the threaded rod rotatably arranged on the top plate, and the thread arranged inside the upper clamping part, so that the contacts of the two can be stably connected, and the connection status can also be observed and judged in time, an automatic welding conversion unit, and the automatic welding conversion unit is arranged inside a protective shell to form a standardized use. This steel bar welding device for construction, through the configured automatic welding conversion unit, drives the upper steel bar to rise slowly. After a preset time, it not only accurately controls the movement trajectory of the upper steel bar, but also through the formulation of a standardized operating process, the arc plate and the arc groove of the upper arc cylinder and the lower arc cylinder assembly will not be able to fit tightly, so that they can more easily identify and solve problems.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a steel bar welding device for building construction. Background Art

[0002] With the rapid development of urbanization, the construction industry has an increasing demand for the application of steel structures. As the main material in steel structures, the welding quality and efficiency of steel bars directly affect the overall quality and construction period of the building. Therefore, steel bar welding devices play a vital role in construction.

[0003] There are many types of existing steel bar welding, including welding of two vertical steel bars. A special steel bar welding device is used for construction. The device usually includes a support platform, a slide, a welding part, a clamping part and other components. Through the sliding welding part and the supporting part, the steel bar can be automatically positioned and clamped, and the welding process is completed by a welding gun.

[0004] However, it has been observed in actual application that when the clamping part is used to clamp the steel bars for welding, it is necessary to rely on the observation of employees to determine whether the appropriate welding state has been achieved. In particular, when the cross-section of the steel bar is not horizontal, this judgment process is particularly difficult and often difficult to accurately identify, which may lead to substandard welding quality. In addition, in the entire welding process, employees mostly make judgments based on personal experience and lack unified and clear standards. This situation has caused two major problems in subsequent use: one is that the number of employees willing to participate in the operation has decreased, and the other is that due to the lack of standards, the quality of each welded steel bar is uneven, making it difficult to effectively control the overall pass rate. For this reason, we propose a steel bar welding device for construction. Summary of the invention

[0005] A technical problem to be solved by the present application is that the traditional welding of upper and lower steel bars almost requires employees to make their own judgments, resulting in a poor pass rate, and the different roundness of the upper and lower steel bars is not easy to observe, but it is difficult to detect when the end face of the steel bar itself is an inclined surface.

[0006] In order to solve the above technical problems, the embodiment of the present application provides a steel bar welding device for construction, comprising a main frame, a lower clamping part arranged at the bottom of the main frame, and an upper clamping part movably arranged on the outer surface of the main frame, wherein a protective shell is arranged at the bottom of the lower clamping part, and further comprising:

[0007] A top plate, which is arranged on the top of the main frame;

[0008] A threaded rod, the top end of which is rotatably mounted on the top plate, the threaded rod is threadedly mounted inside the upper clamping portion, and the bottom end of which passes through the lower clamping portion and extends to the inside of the protective shell;

[0009] An anti-deviating component is arranged on the lower clamping part, and is used to stably connect the contacts of the upper and lower clamping parts when both clamp the upper and lower steel bars, and can also observe and judge the connection status in time;

[0010] The automatic welding conversion unit is arranged inside the protective shell and is used to automatically drive the upper clamping part to move, so that the upper steel bar moves during welding, forming a standardized use.

[0011] In some embodiments, the automatic welding conversion unit includes a motor arranged inside a protective shell, an output shaft is arranged at the output end of the motor, a transmission wheel is sleeved on the outer surface of the output shaft, a driven wheel is rotatably arranged inside the protective shell, the driven wheel and the transmission wheel are engaged with each other, an L-shaped plate is movably arranged inside the protective shell, a straight groove is opened on the L-shaped plate, a straight plate is arranged at the top of the driven wheel, a sliding rod is rotatably arranged at the top of the straight plate, and the sliding rod is movably arranged in the straight groove.

[0012] In some embodiments, a slide groove is provided inside the protective shell, a slider is provided at the bottom of the L-shaped plate, and the slider is movably provided in the slide groove. A shaft rod is rotatably provided at the bottom of the inner wall of the protective shell, and a spur gear is sleeved on the shaft rod. A rack is provided on the inner side of the L-shaped plate, and the spur gear and the rack are meshed with each other. A concentric wheel is provided on the top of the shaft rod, and a connecting wheel is sleeved on the outer surface of the threaded rod inside the protective shell, and the connecting wheel and the concentric wheel are meshed with each other. A reverse rotating component is provided on the threaded rod for quickly pressing down when the steel bar welding is completed.

[0013] In some embodiments, the reverse rotation component includes gear one sleeved on the outer surface of the threaded rod, a connecting rod is provided on the top of the inner wall of the protective shell, a gear two is movably provided on the bottom end of the connecting rod, the gear one and gear two are meshed with each other, the outer surface of the output shaft is sleeved with gear three, and the gear three and gear two are meshed with each other, and the output shaft is provided with a gear switching component that controls the forward and reverse rotation of the threaded rod and drives the upper clamping part to rise and fall.

[0014] In some embodiments, the gear switching assembly includes a double-way ratchet cylinder slidably arranged on the outer surface of the output shaft, and the adjacent end surfaces of the gear three and the transmission wheel are inlaid with one-way ratchet cylinders, and both ends of the double-way ratchet cylinder are movably arranged at the corresponding one-way ratchet cylinder end surfaces, and the inner wall of the double-way ratchet cylinder is provided with an annular groove, and the inner wall of the annular groove is provided with a spring, and one end of the spring is arranged on the output shaft.

[0015] In some embodiments, the outer surface of the double-item ratchet cylinder is provided with a side plate, the side of the side plate is provided with a fixed plate, the side of the fixed plate is provided with an inclined rod, the top of the L-shaped plate is provided with a wedge block, and the inclined rod is movably provided on the outer surface of the wedge block.

[0016] In some embodiments, a lifting cylinder is provided on the side of the fixed plate, and the inner wall of the lifting cylinder is slidably set on the threaded rod. The adjacent end faces of the gear 1 and the connecting wheel are inlaid with rings, and the inner walls of the two rings are provided with inclined grooves. Inclined plates are provided at both ends of the lifting cylinder, and the inclined plates provided at both ends of the lifting cylinder are movably set in the corresponding inclined grooves respectively.

[0017] In some embodiments, the anti-deviation component includes a support plate arranged on the side of the lower clamping portion, a long strip plate is arranged on the side of the support plate, two upper arc-shaped cylinders are movably arranged on the inner wall of the long strip plate, and the adjacent sides of the two upper arc-shaped cylinders are tightly fitted, and the inner walls of the two upper arc-shaped cylinders are each provided with two limiting plates, and the four limiting plates are provided with two semicircular plates, and the two semicircular plates are used to clamp on the outer surface of the upper steel bar.

[0018] In some embodiments, two lower arc tubes are provided on the inner wall of the long strip, and the two lower arc tubes can clamp the lower steel bars, the outer surfaces of the two lower arc tubes are provided with arc grooves, and the bottoms of the two upper arc tubes are provided with arc plates, so that the two arc plates are movably arranged on the inner walls of the corresponding arc grooves.

[0019] In some embodiments, a plurality of balls are movably disposed on the outer surface of the sliding block, and the outer surfaces of the plurality of balls are movably disposed on the inner wall of the sliding groove.

[0020] The present invention has at least the following beneficial effects:

[0021] 1. With the automatic welding conversion unit, only simple operations are required during use: add welding flux and start the welding gun, which will start immediately, drive the upper steel bar to rise slowly, and guide it to slowly descend during the welding stage until it accurately touches the lower steel bar. After a preset time, the welding gun automatically stops working. At this time, the system will automatically drive the upper steel bar to press down quickly to ensure that a solid weld is formed at the connection between the upper and lower steel bars. This series of rising and falling actions not only accurately controls the movement trajectory of the upper steel bar, but also improves production efficiency and welding qualification rate by formulating standardized operating procedures;

[0022] 2. The anti-deviance component can be clamped on the outer surface of the upper and lower steel bars to perform the clamping operation, and then welding flux is added. If the two fail to maintain a concentric and relatively horizontal state, the arc plate and arc groove of the upper arc cylinder and the lower arc cylinder assembly will not fit tightly. The cleverness of this design is that it allows users to immediately and intuitively find the problem. This not only greatly reduces the workload of employees, but also enables them to identify and solve problems more easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the protective shell section and the threaded rod of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the automatic welding conversion unit and the threaded rod of the present invention;

[0026] Figure 4 It is a schematic diagram of the exploded structure of the L-shaped plate, concentric wheels, sliders and racks of the present invention;

[0027] Figure 5 It is a schematic diagram of the exploded structure of the threaded rod, L-shaped plate, gear 1 and fixed plate of the present invention;

[0028] Figure 6 It is a schematic diagram of the exploded structure of the gear switching assembly of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the reverse rotation assembly, the threaded rod and the side plate of the present invention;

[0030] Figure 8 It is a schematic diagram of the exploded structure of the gear 3, the side plate, the output shaft, the double-term ratchet cylinder and the single-term ratchet cylinder of the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of the double-term ratchet cylinder and the spring of the present invention;

[0032] Fig.10 This is a schematic diagram of the structure of the anti-deviating component of the present invention;

[0033] Fig.11 It is a schematic diagram of the explosion structure of the anti-deviating assembly of the present invention;

[0034] Fig.12 It is a schematic diagram of the structure of the ball, slider and L-shaped plate of the present invention.

[0035] In the figure: 1, main frame; 2, upper clamping part; 3, lower clamping part; 4, top plate; 5, threaded rod; 6, protective shell; 7, anti-deviating assembly; 71, support plate; 72, upper arc cylinder; 73, lower arc cylinder; 74, long strip plate; 75, semicircular plate; 76, limit plate; 77, arc plate; 78, arc groove; 8, automatic welding conversion unit; 81, L-shaped plate; 82, slide groove; 83, concentric wheel; 84, slider; 85, rack; 86, motor; 87, output shaft; 88, transmission wheel; 89, driven wheel; 810, Straight plate; 811, connecting wheel; 812, spur gear; 813, shaft; 814, straight groove; 815, slide bar; 9, gear switching assembly; 91, fixed plate; 92, wedge; 93, inclined rod; 94, collar; 95, inclined groove; 96, lifting cylinder; 97, inclined plate; 98, side plate; 99, one-way ratchet cylinder; 910, two-way ratchet cylinder; 911, ring groove; 912, spring; 10, reverse rotation assembly; 101, gear one; 102, gear two; 103, gear three; 104, connecting rod; 11, ball. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. 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.

[0037] Example 1: Please refer to Figure 1-11 The present invention provides a technical solution: a steel bar welding device for construction, comprising a main frame 1, a lower clamping part 3 arranged at the bottom of the main frame 1 and an upper clamping part 2 movably arranged on the outer surface of the main frame 1, a protective shell 6 is arranged at the bottom of the lower clamping part 3, the upper clamping part 2 and the lower clamping part 3 are both existing technologies, and no further details are given here, and also include:

[0038] A top plate 4, which is disposed on the top of the main frame 1, and the top plate 4 can be disposed to prevent the upper clamping portion 2 from being separated from the main frame 1;

[0039] A threaded rod 5, the top end of which is rotatably mounted on the top plate 4, and the threaded rod 5 is threadedly mounted inside the upper clamping portion 2, and the bottom end of the threaded rod 5 passes through the lower clamping portion 3 and extends to the inside of the protective shell 6;

[0040] The anti-deviation component 7 is arranged on the lower clamping part 3, and is used to stably connect the contacts of the upper clamping part 2 and the lower clamping part 3 when both clamp the upper and lower steel bars, and can also observe and judge the connection status in time;

[0041] The automatic welding conversion unit 8 is arranged inside the protective shell 6 and is used to automatically drive the upper clamping part 2 to move, so that the upper steel bar moves during welding, forming a standardized use.

[0042] The automatic welding conversion unit 8 includes a motor 86 arranged inside the protective shell 6, and an output shaft 87 is arranged at the output end of the motor 86. A transmission wheel 88 is sleeved on the outer surface of the output shaft 87. A driven wheel 89 is rotatably arranged inside the protective shell 6, and the driven wheel 89 is meshed with the transmission wheel 88. An L-shaped plate 81 is movably arranged inside the protective shell 6, and a straight groove 814 is opened on the L-shaped plate 81. A straight plate 810 is arranged at the top of the driven wheel 89, and a sliding rod 815 is rotatably arranged at the top of the straight plate 810. The sliding rod 815 is movably arranged in the straight groove 814. The output shaft 87 can be driven to rotate by the setting of the motor 86, and the transmission wheel 88 arranged on the outer surface of the output shaft 87 can drive the driven wheel 89 to rotate, so that the straight plate 810 can drive the sliding rod 815 to slide in the straight groove 814.

[0043] A slide groove 82 is provided inside the protective shell 6, a slider 84 is provided at the bottom of the L-shaped plate 81, and the slider 84 is movably provided in the slide groove 82. A shaft rod 813 is rotatably provided at the bottom of the inner wall of the protective shell 6, and a spur gear 812 is sleeved on the shaft rod 813. A rack 85 is provided on the inner side of the L-shaped plate 81, and the spur gear 812 and the rack 85 are meshed with each other. A concentric wheel 83 is provided on the top of the shaft rod 813. A connecting wheel 811 is sleeved on the outer surface of the threaded rod 5 inside the protective shell 6. The connecting wheel 81 1 and the concentric wheel 83 are meshed with each other, and the threaded rod 5 is provided with a reverse rotation component 10 for quickly pressing down when the steel bar welding is completed. When the L-shaped plate 81 has a slider 84, and the slider 84 also slides in the slide groove 82, it can drive the L-shaped plate to reciprocate, so it can drive the rack 85 set on the inner side to move, and the rack 85 can drive the meshing spur gear 812 to rotate. Since the concentric wheel 83 and the spur gear 812 are concentric due to the shaft 813, the two have the same rotation angle.

[0044] The reverse rotation component 10 includes a gear 101 sleeved on the outer surface of the threaded rod 5, a connecting rod 104 is provided on the top of the inner wall of the protective shell 6, and a gear 2 102 is movably provided on the bottom end of the connecting rod 104. The gear 101 and the gear 2 102 are meshed with each other. The outer surface of the output shaft 87 is sleeved with a gear 3 103, and the gear 3 103 and the gear 2 102 are meshed with each other. The output shaft 87 is provided with a gear switching component 9 for controlling the forward and reverse rotation of the threaded rod 5 and driving the upper clamping part 2 to rise and fall. The gear 101 can drive the threaded rod 5 to rotate through the provided gear 2 102 and gear 3 103.

[0045] The gear switching assembly 9 includes a double-way ratchet cylinder 910 slidably arranged on the outer surface of the output shaft 87, and the adjacent end surfaces of the gear three 103 and the transmission wheel 88 are inlaid with a one-way ratchet cylinder 99, and both ends of the double-way ratchet cylinder 910 are movably arranged at the end surfaces of the corresponding one-way ratchet cylinder 99, and the inner wall of the double-way ratchet cylinder 910 is provided with an annular groove 911, and the inner wall of the annular groove 911 is provided with a spring 912, and one end of the spring 912 is arranged on the output shaft 87. By utilizing the uniform ratchet arrangement at both ends of the double-way ratchet cylinder 910, it can be stuck back and forth on different one-way ratchet cylinders, thereby driving the transmission wheel 88 or the gear three 103 to rotate.

[0046] The outer surface of the double-item ratchet cylinder 910 is provided with a side plate 98, the side of the side plate 98 is provided with a fixed plate 91, the side of the fixed plate 91 is provided with a diagonal rod 93, and the top of the L-shaped plate 81 is provided with a wedge block 92. The diagonal rod 93 is movably provided on the outer surface of the wedge block 92. The double-item ratchet cylinder 910 can be driven and moved by the side plate 98, which requires the diagonal rod 93 to slide to the wedge block 92.

[0047] A lifting cylinder 96 is arranged on the side of the fixed plate 91, and the inner wall of the lifting cylinder 96 is slidably arranged on the threaded rod 5. The adjacent end faces of the gear 101 and the connecting wheel 811 are inlaid with rings 94, and the inner walls of the two rings 94 are provided with inclined grooves 95. Both ends of the lifting cylinder 96 are provided with inclined plates 97. The inclined plates 97 arranged at both ends of the lifting cylinder 96 are respectively movably arranged in the corresponding inclined grooves 95. The lifting cylinder 96 is driven to slide on the outer surface of the threaded rod 5 through the fixed plate 91, and the inclined plate 97 on the outer surface can be clamped in the inclined groove 95 of the ring 94. Being clamped in different rings 94 can drive the gear 101 or the connecting wheel 811 to rotate.

[0048] The anti-deviance component 7 includes a support plate 71 arranged on the side of the lower clamping portion 3, and a long strip plate 74 is arranged on the side of the support plate 71. Two upper arc tubes 72 are movably arranged on the inner wall of the long strip plate 74, and the adjacent sides of the two upper arc tubes 72 are tightly fitted. The inner walls of the two upper arc tubes 72 are each provided with two limiting plates 76. The four limiting plates 76 are provided with two semicircular plates 75, and the two semicircular plates 75 are used to clamp on the outer surface of the upper steel bar. The semicircular plates 75 can clamp the upper steel bar, and the lower arc tube 73 can be clamped at the lower steel bar, which can be reflected in the distribution of the postures of the two and the semicircular plates 75 and the lower arc tube 73.

[0049] The inner wall of the long plate 74 is provided with two lower arc tubes 73, and the two lower arc tubes 73 can clamp the lower steel bars. The outer surfaces of the two lower arc tubes 73 are provided with arc grooves 78. The bottoms of the two upper arc tubes 72 are provided with arc plates 77. For this purpose, the two arc plates 77 are movably arranged on the inner walls of the corresponding arc grooves 78. By observing whether the arc plates 77 enter the arc grooves 78, the posture when the upper and lower steel bars are connected can be intuitively judged.

[0050] When using the device, firstly, the upper clamping part 2 and the lower clamping part 3 need to be connected to the upper and lower steel bars respectively. At this time, the two upper arc tubes 72 and the lower arc tube 73 can be connected to the upper and lower steel bars respectively. At this time, the arc plate 77 at the bottom of the upper arc tube 72 can be observed to enter the arc groove 78. When it is fully entered, the next step can be carried out. When the two are difficult to get stuck, a secondary adjustment is required. After the adjustment is completed, the welding machine can be placed on the upper steel bar. At this time, the motor 86 starts to drive the transmission wheel 88 on the outer surface to rotate, and the transmission wheel 88 drives the driven wheel 89 on the outer surface to rotate, and the driven wheel 89 drives the straight plate 810 to rotate, and the straight plate 810 drives the top slide bar 815 to slide in the straight groove 814, and the L-shaped plate 81 drives the slider 84 in the slide groove 814 under the action of the slide bar 815. 2, so it can drive the inner rack 85 to move, the rack 85 will drive the shaft 813 to rotate, and the shaft 813 can drive the shaft 813 to rotate, the shaft 813 will drive the concentric wheel 83 at the top to rotate, and the concentric wheel 83 drives the connecting wheel 811 on the outer surface to rotate, because the inclined plate 97 on the outer surface of the lifting cylinder 96 is stuck in the inclined groove 95 in the sleeve ring 94 at the lower end, it will drive the threaded rod 5 to rotate, thereby driving the upper clamping part 2 to rise on the outer surface of the main frame 1. When the straight plate 810 rotates 180 degrees, it drives the L-shaped plate 81 to move in the opposite direction, and the synchronous welding machine starts immediately to weld the upper steel bar, and the straight plate 810 pulls the L-shaped plate 81 back, thereby driving the threaded rod 5 to rotate in the opposite direction, thereby driving the upper clamping part 2 to descend from the outer surface of the main frame 1;

[0051] When the L-shaped plate 81 moves in the opposite direction, the wedge block 92 at the top will be brought into contact with the inclined rod 93, thereby driving the inclined rod 93 to rise. At this time, the inclined rod 93 will drive the fixed plate 91 to move, and the fixed plate 91 will drive the lifting cylinder 96 set on the side to rise, and move the bottom lifting cylinder 96 away from the ring 94 in the connecting wheel 811, so that it reaches the inclined groove 95 at the gear 101, so that when the gear 101 rotates, the threaded rod 5 can be driven to rotate through the lifting cylinder 96. In the synchronous process of the fixed plate 91 rising, the side plate 98 will be driven to move, and the side plate 98 will drive the double-way ratchet cylinder 910 set on the side to slide and rise. At this time, the double-way ratchet cylinder 910 will be stuck at the one-way ratchet cylinder 99 above, so that the output shaft 87 is connected to the gear three 103, and when the double-way ratchet cylinder 910 rises, it will pull the spring 912 in the ring groove 911 to deform. When the L-shaped plate 81 rotates again by 18 0, the complete engagement is completed, and the welding machine stops working. At this time, the output shaft 87 will drive the double-item ratchet cylinder 910 and the one-way ratchet cylinder 99 to rotate, thereby driving the gear three 103 to rotate, and the gear three 103 will drive the gear one 101 to rotate through the gear two 102. Therefore, the gear one 101 drives the threaded rod 5 to rotate through the lifting cylinder 96, so that the threaded rod 5 drives the upper clamping part 2 to quickly descend on the outer surface of the main frame 1. At this time, a welding point will be formed at the connection between the upper and lower steel bars, and the welding can be completed. After completion, the L-shaped plate 81 will drive the wedge block 92 away from the inclined rod 93, and the spring 912 drives the fixed plate 91 and the side plate 98 to reset, so that the inclined plate 97 is re-stuck in the inclined groove 95, and the double-item ratchet cylinder 910 is re-stuck at the one-way ratchet cylinder 99. At this time, when the upper clamping part 2 is away from the upper steel bar, it will rise again for a while, so that the lower clamping part 3 can be reset to the starting position.

[0052] Example 2: Please refer to Fig.12 The present invention provides a technical solution: a plurality of balls 11 are movably arranged on the outer surface of the slider 84, and the outer surfaces of the plurality of balls 11 are movably arranged on the inner wall of the slide groove 82. The arranged balls 11 can reduce the friction force of the slider 84 in the slide groove 82.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0054] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A steel bar welding device for construction, comprising a main frame (1), a lower clamping portion (3) arranged at the bottom of the main frame (1), and an upper clamping portion (2) movably arranged on the outer surface of the main frame (1), characterized in that: The bottom of the lower clamping portion (3) is provided with a protective shell (6), and further comprises: A top plate (4), wherein the top plate (4) is arranged on the top of the main frame (1); A threaded rod (5), the top end of which is rotatably mounted on the top plate (4), the threaded rod (5) being threadably mounted inside the upper clamping portion (2), and the bottom end of which passes through the lower clamping portion (3) and extends to the inside of the protective shell (6); An anti-deviating component (7), wherein the anti-deviating component (7) is arranged on the lower clamping part (3) and is used to ensure that the contact points of the upper clamping part (2) and the lower clamping part (3) are stably connected when both clamp the upper and lower steel bars, and the connection state can also be observed and judged in time; An automatic welding conversion unit (8) is arranged inside the protective shell (6) and is used to automatically drive the upper clamping part (2) to move, so that the upper steel bar moves during welding, forming a standardized use.

2. The steel bar welding device for construction according to claim 1, characterized in that: The automatic welding conversion unit (8) comprises a motor (86) arranged inside a protective shell (6); an output shaft (87) is arranged at the output end of the motor (86); a transmission wheel (88) is sleeved on the outer surface of the output shaft (87); a driven wheel (89) is rotatably arranged inside the protective shell (6); the driven wheel (89) and the transmission wheel (88) are meshed with each other; an L-shaped plate (81) is movably arranged inside the protective shell (6); a straight groove (814) is provided on the L-shaped plate (81); a straight plate (810) is arranged at the top end of the driven wheel (89); a sliding rod (815) is rotatably arranged at the top end of the straight plate (810); and the sliding rod (815) is movably arranged in the straight groove (814).

3. The steel bar welding device for construction according to claim 2, characterized in that: A slide groove (82) is provided inside the protective shell (6), a slider (84) is provided at the bottom of the L-shaped plate (81), and the slider (84) is movably arranged in the slide groove (82). A shaft rod (813) is rotatably provided at the bottom of the inner wall of the protective shell (6), and a spur gear (812) is sleeved on the shaft rod (813). A rack (85) is provided on the inner side of the L-shaped plate (81), and the spur gear (812) and the rack (85) are meshed with each other. A concentric wheel (83) is provided at the top of the shaft rod (813). A connecting wheel (811) is sleeved on the outer surface of the threaded rod (5) inside the protective shell (6), and the connecting wheel (811) and the concentric wheel (83) are meshed with each other. A reverse rotation component (10) for quickly pressing down when the steel bar welding is completed is provided on the threaded rod (5).

4. The steel bar welding device for construction according to claim 3 is characterized in that: The reverse rotation component (10) comprises a gear 1 (101) sleeved on the outer surface of the threaded rod (5); a connecting rod (104) is provided on the top of the inner wall of the protective shell (6); a gear 2 (102) is movably provided on the bottom end of the connecting rod (104); the gear 1 (101) and the gear 2 (102) are meshed with each other; a gear 3 (103) is sleeved on the outer surface of the output shaft (87); the gear 3 (103) and the gear 2 (102) are meshed with each other; and a gear switching component (9) is provided on the output shaft (87) for controlling the forward and reverse rotation of the threaded rod (5) and driving the upper clamping part (2) to rise and fall.

5. The steel bar welding device for construction according to claim 4, characterized in that: The gear switching assembly (9) comprises a double-way ratchet cylinder (910) slidably arranged on the outer surface of the output shaft (87), the adjacent end surfaces of the gear three (103) and the transmission wheel (88) are both inlaid with a one-way ratchet cylinder (99), and both ends of the double-way ratchet cylinder (910) are movably arranged at the end surface of the corresponding one-way ratchet cylinder (99), the inner wall of the double-way ratchet cylinder (910) is provided with an annular groove (911), the inner wall of the annular groove (911) is provided with a spring (912), and one end of the spring (912) is arranged on the output shaft (87).

6. The steel bar welding device for construction according to claim 5, characterized in that: The outer surface of the double-ended ratchet cylinder (910) is provided with a side plate (98), a fixing plate (91) is provided on the side of the side plate (98), an inclined rod (93) is provided on the side of the fixing plate (91), a wedge block (92) is provided on the top of the L-shaped plate (81), and the inclined rod (93) is movably provided on the outer surface of the wedge block (92).

7. The steel bar welding device for construction according to claim 6, characterized in that: A lifting cylinder (96) is arranged on the side of the fixing plate (91), and the inner wall of the lifting cylinder (96) is slidably arranged on the threaded rod (5). The adjacent end faces of the gear 1 (101) and the connecting wheel (811) are inlaid with collars (94), and the inner walls of the two collars (94) are provided with inclined grooves (95). Inclined plates (97) are arranged at both ends of the lifting cylinder (96), and the inclined plates (97) arranged at both ends of the lifting cylinder (96) are movably arranged in the corresponding inclined grooves (95) respectively.

8. The steel bar welding device for construction according to claim 1, characterized in that: The anti-deviating component (7) comprises a support plate (71) arranged on the side of the lower clamping part (3), a long strip plate (74) is arranged on the side of the support plate (71), two upper arc-shaped cylinders (72) are movably arranged on the inner wall of the long strip plate (74), and the adjacent sides of the two upper arc-shaped cylinders (72) are tightly fitted, and the inner walls of the two upper arc-shaped cylinders (72) are each provided with two limiting plates (76), and the four limiting plates (76) are provided with two semicircular plates (75), and the two semicircular plates (75) are used to clamp on the outer surface of the upper steel bar.

9. The steel bar welding device for construction according to claim 8, characterized in that: The inner wall of the long strip (74) is provided with two lower arc tubes (73), and the two lower arc tubes (73) can clamp the lower steel bar, and the outer surfaces of the two lower arc tubes (73) are provided with arc grooves (78), and the bottoms of the two upper arc tubes (72) are provided with arc plates (77), and for this purpose, the two arc plates (77) are movably arranged on the inner walls of the corresponding arc grooves (78).

10. The steel bar welding device for construction according to claim 3, characterized in that: The outer surface of the sliding block (84) is movably provided with a plurality of balls (11), and the outer surfaces of the plurality of balls (11) are movably provided on the inner wall of the sliding groove (82).

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