Portable steel bar welding device for fireproof window construction

Abstract

The invention belongs to the technical field of steel bar welding, and particularly discloses a portable steel bar welding device for fireproof window construction, comprising: a welding gun for welding; the number of the mounting plates is two, and the two mounting plates are symmetrically arranged on the front side and the rear side of the welding gun; and the first pushing assembly is connected between the welding gun and the two mounting plates and used for driving the welding gun to move. By arranging the clamping device, when reinforcing steel bars are welded, stable pressing operation on the reinforcing steel bars to be welded can be achieved through the cooperation effect of a hook rod and a clamping plate, the two reinforcing steel bars are tightly attached, the problems of'weld seam ', 'pseudo soldering' and the like caused by difficult manual fixing in a narrow space are solved fundamentally, it is ensured that the strength of a welding joint reaches the standard, and the welding efficiency is improved. The structural bearing capacity and the fireproof and heat-insulating performance of the fireproof window are guaranteed, the reworking probability is reduced, and the construction period is shortened.

Description

Technical Field

[0001] This invention belongs to the field of steel bar welding technology, and in particular relates to a portable steel bar welding device for fireproof window construction. Background Technology

[0002] Fireproof windows are a special type of window that combines fireproof and heat insulation functions with the functions of ordinary windows. They are primarily used in key areas such as fire compartments and evacuation routes in buildings. In the event of a fire, they can prevent the spread of fire and smoke, thus buying time for evacuation and fire rescue.

[0003] During the construction of fireproof windows, steel bar welding is a crucial process to ensure the structural strength and fire resistance of the windows. However, if the steel bars are to be welded inside the window frame or near pre-reserved openings in the wall, the narrow working area makes it difficult to manually tighten and fix the steel bars. This can easily lead to defects such as weld gaps and incomplete welds, severely affecting the structural load-bearing capacity and fire resistance of the fireproof window, and even requiring rework and extending the construction period.

[0004] Therefore, it is necessary to invent a portable steel bar welding device for fireproof window construction to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a portable steel bar welding device for fireproof window construction, thereby resolving the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a portable steel bar welding device for fireproof window construction, comprising: A welding torch is used for welding operations. Mounting plates, the number of which is two, the two mounting plates are symmetrically arranged on the front and rear sides of the welding gun; The first pushing component is connected between the welding torch and the two mounting plates and is used to drive the welding torch to move; A clamping device, located at the bottom of the welding torch, is used to clamp the two reinforcing bars to be welded. The clamping device includes a hook rod, a connecting assembly, a clamping plate, and a second pushing assembly. The hook rod is L-shaped, and its vertical section is vertically positioned directly opposite the free end of the welding torch. The connecting assembly is connected to the bottom end of the hook rod and is used to drive the hook rod to deflect horizontally. The clamping plate is vertically positioned directly opposite the hook rod and is closer to the welding torch than the hook rod. The second pushing assembly is connected between the clamping plate and two mounting plates and is used to drive the clamping plate to move closer to or further away from the hook rod.

[0007] Furthermore, the first pushing assembly includes a first electric push rod and a mounting block, the mounting block being horizontally slidably mounted between two mounting plates, and the welding torch being horizontally mounted at the bottom of the mounting block, the first electric push rod being horizontally fixedly connected to the side of the mounting block away from the hook rod, and the first electric push rod being detachably mounted between the two mounting plates.

[0008] Furthermore, the connecting assembly includes an L-shaped connecting rod, a connecting plate, a fixing screw, and an adjusting mechanism. The connecting rod is horizontally positioned on the side of the hook rod closest to the mounting plate, and the horizontal sections of the connecting rod and the hook rod are on the same horizontal plane. The connecting plate is horizontally fixedly connected to the side of the connecting rod away from the hook rod. The fixing screw is vertically rotatably inserted into the bottom of the connecting plate. A fixing block is threaded onto the top of the fixing screw, and the fixing block is fixedly connected between the two mounting plates. The adjusting mechanism is connected between the bottom end of the hook rod and the connecting rod, and is used to adjust the distance between the hook rod and the clamping plate.

[0009] Furthermore, the adjustment mechanism includes a plug rod and an adjustment screw. The plug rod is slidably inserted into the end of the connecting rod near the hook rod, and the plug rod and the bottom end of the hook rod are horizontally and vertically fixed together. The adjustment screw is horizontally rotatably connected to the end of the plug rod away from the hook rod, and the free end of the adjustment screw is threaded through and inserted into the side of the connecting rod away from the hook rod.

[0010] Furthermore, the second pushing component includes an arc-shaped plate, a slider, and a second electric push rod. The arc-shaped plate is vertically disposed on the side of the clamping plate near the welding gun, and the side of the arc-shaped plate near the clamping plate has an arc surface design. The clamping plate is slidably mounted on the arc surface of the arc-shaped plate in the horizontal direction. A vertical groove is provided on the side of the arc-shaped plate away from the clamping plate. The slider is slidably mounted in the groove. The second electric push rod is horizontally and vertically fixedly connected between the slider and the fixed block.

[0011] Furthermore, a transmission assembly is connected between the slider and the connecting plate to drive the hook rod to deflect horizontally. The transmission assembly includes a gear ring, a rack, and a shaped fixing rod. The gear ring is fixedly connected to the top of the connecting plate and is sleeved around the fixed screw. The rack is horizontally arranged on the side of the gear ring, and a section of teeth is provided on the side of the rack near the gear ring, and the teeth can mesh with the gear ring. A vertical strip hole is opened through one side wall of the slide groove. The top end of the shaped fixing rod passes through the strip hole and is fixedly connected to the slider. The bottom end of the shaped fixing rod is fixedly connected to the end of the rack near the arc plate.

[0012] Furthermore, a magnetic block is fixedly connected to the top position of the connecting rod away from the hook rod, and when the hook rod and the welding gun are in a directly opposite position, the magnetic block can just be attracted together with the rack.

[0013] Furthermore, a stop is provided on the side of the rack away from the magnetic block. The stop is fixedly connected to the bottom of the fixing block, and the stop is slidably installed on the side of the rack away from the magnetic block.

[0014] Furthermore, the teeth can drive the toothed ring to rotate half a turn, and when the second electric push rod is fully shortened, the teeth on the rack can maintain engagement with the toothed ring, and at this time the horizontal sections of the connecting rod and the hook rod can be retracted into the bottom area of ​​the two mounting plates.

[0015] Furthermore, the top of the hook rod is higher than the height of the free end of the welding torch, and when the second electric push rod is fully shortened, the vertical section of the hook rod can remain in contact with the side of the mounting plate near the adjusting screw.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention, by incorporating a clamping device, enables stable clamping of the reinforcing bars during welding through the cooperation of the hook rod and the clamping plate. This ensures that the two reinforcing bars fit tightly together, fundamentally solving problems such as "weld gaps" and "incomplete welds" caused by the difficulty of manual fixing in narrow spaces. It ensures that the strength of the welded joint meets the standards, thereby guaranteeing the structural load-bearing capacity and fireproof and heat-insulating performance of the fireproof window, reducing the probability of rework, and shortening the construction cycle. 2. By incorporating an adjustment mechanism, this invention can precisely adapt the clamping distance between the hook rod and the clamping plate to meet the clamping requirements of steel bars of different diameters when dealing with the differences in steel bar diameters of different fireproof window models. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure when the present invention is in use; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a three-dimensional schematic diagram of the hook rod, transmission assembly, and adjustment mechanism in this invention; Figure 4 This is a three-dimensional schematic diagram of the second pushing component, the irregularly shaped fixing rod, and the rack in this invention.

[0018] In the diagram: 1. Welding torch; 2. Mounting plate; 3. Hook rod; 4. Clamping plate; 5. First electric push rod; 6. Mounting block; 7. Connecting rod; 8. Connecting plate; 9. Fixing screw; 10. Fixing block; 11. Insert rod; 12. Adjusting screw; 13. Arc plate; 14. Slider; 15. Second electric push rod; 16. Gear ring; 17. Gear rack; 18. Irregularly shaped fixing rod; 19. Tooth; 20. Magnetic block; 21. Stop block. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0020] This invention provides, for example Figures 1 to 4 A portable rebar welding device for fireproof window construction is shown, comprising: a welding torch 1, a mounting plate 2, a first pushing assembly, and a clamping device; the welding torch 1 is used for welding operations; there are two mounting plates 2, which are symmetrically arranged on the front and rear sides of the welding torch 1; the first pushing assembly is connected between the welding torch 1 and the two mounting plates 2, and is used to drive the welding torch 1 to move; the clamping device is located at the bottom of the welding torch 1, and is used to clamp the two rebars to be welded, the clamping device including a hook rod 3, a connecting assembly, a clamping plate 4, and a second pushing assembly; the hook rod 3 is L-shaped, and the vertical section of the hook rod 3 is vertically arranged in front of the free end of the welding torch 1; the connecting assembly is connected to the bottom end of the hook rod 3, and is used to drive the hook rod 3 to deflect in the horizontal direction; the clamping plate 4 is vertically arranged in front of the hook rod 3, and the clamping plate 4 is closer to the welding torch 1 than the hook rod 3; the second pushing assembly is connected between the clamping plate 4 and the two mounting plates 2, and is used to drive the clamping plate 4 to move towards or away from the hook rod 3; The first pushing assembly includes a first electric push rod 5 and a mounting block 6. The mounting block 6 is horizontally slidably mounted between two mounting plates 2, and the welding torch 1 is horizontally mounted at the bottom of the mounting block 6. The first electric push rod 5 is horizontally fixedly connected to the side of the mounting block 6 away from the hook rod 3, and the first electric push rod 5 is detachably mounted between the two mounting plates 2. The connecting assembly includes an L-shaped connecting rod 7, a connecting plate 8, a fixing screw 9, and an adjusting mechanism. The connecting rod 7 is horizontally positioned on the side of the hook rod 3 near the mounting plate 2, and the horizontal sections of the connecting rod 7 and the hook rod 3 are on the same horizontal plane. The connecting plate 8 is horizontally fixedly connected to the side of the connecting rod 7 away from the hook rod 3. The fixing screw 9 is vertically rotatably inserted into the bottom of the connecting plate 8. A fixing block 10 is threaded onto the top of the fixing screw 9, and the fixing block 10 is fixedly connected between the two mounting plates 2. The adjusting mechanism is connected between the bottom end of the hook rod 3 and the connecting rod 7, and is used to adjust the distance between the hook rod 3 and the clamping plate 4. The second pushing component includes an arc plate 13, a slider 14, and a second electric push rod 15. The arc plate 13 is vertically arranged on the side of the clamping plate 4 near the welding gun 1, and the side of the arc plate 13 near the clamping plate 4 is designed with an arc surface. The clamping plate 4 is slidably installed on the arc surface of the arc plate 13 in the horizontal direction. A vertical groove is opened on the side of the arc plate 13 away from the clamping plate 4. The slider 14 is slidably installed in the groove. Both the slider 14 and the clamping plate 4 are magnetic and can generate an attraction force with the arc plate 13, so that the arc plate 13 and the slider 14 and the arc plate 13 and the clamping plate 4 can be attracted together, ensuring the stability between the clamping plate 4, the arc plate 13, and the slider 14 when using the hook rod, and improving the convenience of operation. The second electric push rod 15 is horizontally and vertically fixedly connected between the slider 14 and the fixed block 10. When welding of steel bars is required in a narrow space, before welding, the hook rod 3, connecting rod 7 and connecting plate 8 can be connected to the bottom of the fixing block 10 by using the fixing screw 9. Then, the hook rod 3 can be moved to the position directly opposite the end of the welding gun 1, and then the subsequent welding operation can be carried out. During welding, the two steel bars to be welded should be placed according to the instructions. Figure 1 The hook rod 3 is positioned between the hook rod 3 and the clamping plate 4. Then, the second electric push rod 15 is activated, causing it to push the arc-shaped plate 13 and the clamping plate 4 towards the rebar. As the arc-shaped plate 13 and the clamping plate 4 gradually move, the distance between the clamping plate 4 and the hook rod 3 gradually decreases. When both the hook rod 3 and the clamping plate 4 are close to the rebar, the two rebars can be pressed together by the clamping action of the clamping plate 4 and the hook rod 3. Subsequently, the mounting plate 2 can be deflected, causing the welding torch 1 and the second electric push rod 15 to deflect together in the horizontal direction. As the welding torch 1 deflects, the free end of the welding torch 1 can gradually deflect to the side joint of the two rebars. With the second electric push rod 15... With the deflection of 5, the arc plate 13 can slide against the clamping plate 4 under the drive of the second electric push rod 15, while the clamping plate 4 can remain relatively stationary with the reinforcing bars. When the welding torch 1 deflects to the joint of the two reinforcing bars, the first electric push rod 5 can extend, thereby driving the welding end of the welding torch 1 to approach the joint of the two reinforcing bars. When the welding end of the welding torch 1 moves to the appropriate position under the action of the first electric push rod 5, the welding torch 1 can be activated to perform welding operation on the joint of the two reinforcing bars, so that the two reinforcing bars that are close together can be tightly welded together, avoiding the occurrence of false welding, and ensuring the structural load-bearing capacity and fire resistance performance of the fireproof window after welding. In addition, since the slider 14 is slidably installed in the groove in the vertical direction, the mounting plate 2 can also drive the welding gun 1 to move in the vertical direction, thereby realizing the welding operation of a longer area at the joint. During the process of the welding gun 1 moving in the vertical direction, the second electric push rod 15 can drive the slider 14 to move along the groove accordingly, thereby meeting the welding requirements of the welding gun 1 in the vertical direction. When the joint of the two steel bars is welded by the welding gun 1, the two steel bars can initially maintain a tight fit. Then the hook rod 3 and the clamping plate 4 can be loosened, and the hook rod 3 can be deflected to the side of the mounting plate 2, or the fixing screw 9 can be turned to remove the hook rod 3 and the connecting rod 7 and other components from the fixing block 10. This allows the subsequent complete welding operation to be performed independently by the welding gun 1, thereby improving the convenience of welding with the welding gun 1.

[0021] like Figure 1 and Figure 3 As shown, the adjustment mechanism includes a plug rod 11 and an adjustment screw 12. The plug rod 11 is slidably inserted into the end of the connecting rod 7 near the hook rod 3, and the plug rod 11 is horizontally and vertically fixedly connected to the bottom end of the hook rod 3. The adjustment screw 12 is horizontally rotatably connected to the end of the plug rod 11 away from the hook rod 3, and the free end of the adjustment screw 12 is threaded through and inserted into the side of the connecting rod 7 away from the hook rod 3.

[0022] To address the differences in rebar diameter among different fireproof window models, this invention enables precise adaptation of the clamping spacing through an adjustment mechanism. During adjustment, simply rotate the adjusting screw 12, which, through its threaded engagement with the connecting rod 7, pushes the insert rod 11 to slide along the inside of the connecting rod 7, thereby causing the hook rod 3 to move horizontally and changing the distance between the hook rod 3 and the clamping plate 4. This design eliminates the need to replace special clamps and can adapt to commonly used building rebar with diameters from 6 to 25 mm, covering more than 90% of the rebar specifications required in fireproof window construction. Furthermore, the threaded transmission structure of the adjustment mechanism has a self-locking function, ensuring that the position of the hook rod 3 remains stable after adjustment and preventing spacing deviation due to welding vibration, further guaranteeing the consistency and reliability of welding rebar of different specifications.

[0023] like Figures 1 to 4As shown, a transmission assembly that drives the hook rod 3 to deflect horizontally is connected between the slider 14 and the connecting plate 8. The transmission assembly includes a gear ring 16, a rack 17, and a shaped fixing rod 18. The gear ring 16 is fixedly connected to the top of the connecting plate 8 and is sleeved around the fixing screw 9. The rack 17 is horizontally arranged on the side of the gear ring 16, and a section of teeth 19 is provided on the side of the rack 17 near the gear ring 16, and the teeth 19 can mesh with the gear ring 16. A vertical strip hole is opened through one side wall of the slide groove, and the top end of the shaped fixing rod 18 passes through the strip hole and connects with the slider 14. The bottom end of the irregular fixed rod 18 is fixedly connected to the end of the rack 17 near the arc plate 13. The tooth 19 can drive the toothed ring 16 to rotate half a turn. When the second electric push rod 15 is fully shortened, the tooth 19 on the rack 17 can mesh with the toothed ring 16. At this time, the horizontal sections of the connecting rod 7 and the hook rod 3 can be retracted into the bottom area of ​​the two mounting plates 2. The top of the hook rod 3 is higher than the height of the free end of the welding gun 1. When the second electric push rod 15 is fully shortened, the vertical section of the hook rod 3 can be in contact with the side of the mounting plate 2 near the adjusting screw 12. When the device is not in operation, both the first electric push rod 5 and the second electric push rod 15 are in a fully retracted state. At this time, the teeth 19 on the rack 17 can engage with the toothed ring 16, thereby restricting the toothed ring 16 through the teeth 19. This allows the horizontal sections of the connecting rod 7 and the hook rod 3 to retract to the bottom area of ​​the two mounting plates 2, while the vertical section of the hook rod 3 can fit against the side of the mounting plate 2 near the adjusting screw 12. This reduces the size of the invention, making the overall structure of the invention compact and easy to carry and handle on site. At the same time, the free end of the welding torch 1 can be retracted between the two mounting plates 2, thereby protecting the free end of the welding torch 1 from collisions with other objects during transportation or storage, ensuring the safety of the welding torch 1. When the hook rod 3 is needed, as the second electric push rod 15 gradually extends, the rack 17 can drive the toothed ring 16 and the connecting plate 8 to rotate through the teeth 19 under the drive of the slider 14. This allows the hook rod 3 to automatically deflect to the position directly opposite the free end of the welding gun 1 under the drive of the connecting plate 8 and the connecting rod 7, improving the convenience of using the hook rod 3.

[0024] like Figure 3 As shown, a magnetic block 20 is fixedly connected to the top of the connecting rod 7 at the end away from the hook rod 3, and when the hook rod 3 and the welding gun 1 are in a facing position, the magnetic block 20 can just be attracted together with the rack 17. By incorporating a magnetic block 20, when the hook rod 3 is positioned directly opposite the free end of the welding torch 1, the magnetic block 20 can be attracted to the rack 17. This prevents the hook rod 3 from deflecting arbitrarily when hooking the reinforcing bar, thus improving the ease of operation of the hook rod 3.

[0025] like Figure 2 As shown, a stop block 21 is provided on the side of the rack 17 away from the magnet 20. The stop block 21 is fixedly connected to the bottom of the fixing block 10, and the stop block 21 is slidably installed on the side of the rack 17 away from the magnet 20. By providing a stop 21, the stop 21 can restrict and guide the rack 17 as it drives the gear ring 16 to rotate via the teeth 19, thereby preventing the rack 17 from deviating during the rotation of the gear ring 16 and ensuring the transmission stability of the teeth 19 on the rack 17 to the gear ring 16.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A portable steel bar welding device for fireproof window construction, characterized in that, include: Welding torch (1), used for welding operations; Mounting plate (2), there are two mounting plates (2), and the two mounting plates (2) are symmetrically arranged on the front and rear sides of the welding gun (1); The first pushing component is connected between the welding torch (1) and the two mounting plates (2) for driving the welding torch (1) to move; A clamping device is provided at the bottom of the welding torch (1) for clamping the two reinforcing bars to be welded. The clamping device includes a hook rod (3), a connecting component, a clamping plate (4), and a second pushing component. The hook rod (3) is L-shaped, and the vertical section of the hook rod (3) is vertically positioned opposite the free end of the welding torch (1). The connecting component is connected to the bottom end of the hook rod (3) for driving the hook rod (3) to deflect in the horizontal direction. The clamping plate (4) is vertically positioned opposite the hook rod (3), and the clamping plate (4) is closer to the welding torch (1) than the hook rod (3). The second pushing component is connected between the clamping plate (4) and the two mounting plates (2) for driving the clamping plate (4) to move closer to or away from the hook rod (3).

2. The portable steel bar welding device for fireproof window construction according to claim 1, characterized in that: The first pushing assembly includes a first electric push rod (5) and a mounting block (6). The mounting block (6) is horizontally slidably mounted between two mounting plates (2), and the welding torch (1) is horizontally mounted at the bottom of the mounting block (6). The first electric push rod (5) is horizontally fixedly connected to the side of the mounting block (6) away from the hook rod (3), and the first electric push rod (5) is detachably mounted between the two mounting plates (2).

3. The portable steel bar welding device for fireproof window construction according to claim 2, characterized in that: The connecting assembly includes an L-shaped connecting rod (7), a connecting plate (8), a fixing screw (9), and an adjusting mechanism. The connecting rod (7) is horizontally positioned on the side of the hook rod (3) near the mounting plate (2), and the horizontal sections of the connecting rod (7) and the hook rod (3) are located in the same horizontal plane. The connecting plate (8) is horizontally fixedly connected to the side of the connecting rod (7) away from the hook rod (3). The fixing screw (9) is vertically rotated and inserted through the bottom of the connecting plate (8). The top end of the fixing screw (9) is threaded with a fixing block (10), which is fixedly connected between the two mounting plates (2). The adjusting mechanism is connected between the bottom end of the hook rod (3) and the connecting rod (7) to adjust the distance between the hook rod (3) and the clamping plate (4).

4. The portable steel bar welding device for fireproof window construction according to claim 3, characterized in that: The adjustment mechanism includes a plug rod (11) and an adjustment screw (12). The plug rod (11) is slidably inserted into the end of the connecting rod (7) near the hook rod (3), and the plug rod (11) and the bottom end of the hook rod (3) are horizontally and vertically fixed together. The adjustment screw (12) is horizontally rotatably connected to the end of the plug rod (11) away from the hook rod (3), and the free end of the adjustment screw (12) is threaded through and inserted into the side of the connecting rod (7) away from the hook rod (3).

5. The portable steel bar welding device for fireproof window construction according to claim 4, characterized in that: The second pushing component includes an arc plate (13), a slider (14), and a second electric push rod (15). The arc plate (13) is vertically arranged on the side of the clamping plate (4) near the welding gun (1), and the side of the arc plate (13) near the clamping plate (4) is designed with an arc surface. The clamping plate (4) is slidably installed on the arc surface of the arc plate (13) in the horizontal direction. A vertical groove is opened on the side of the arc plate (13) away from the clamping plate (4). The slider (14) is slidably installed in the groove. The second electric push rod (15) is horizontally and vertically fixedly connected between the slider (14) and the fixed block (10).

6. The portable steel bar welding device for fireproof window construction according to claim 5, characterized in that: The slider (14) and the connecting plate (8) are connected by a transmission assembly that drives the hook rod (3) to deflect in the horizontal direction. The transmission assembly includes a toothed ring (16), a rack (17) and a special-shaped fixing rod (18). The toothed ring (16) is fixedly connected to the top of the connecting plate (8) and is sleeved on the periphery of the fixing screw (9). The rack (17) is horizontally arranged on the side of the toothed ring (16) and a section of teeth (19) is provided on the side of the rack (17) near the toothed ring (16). The teeth (19) can mesh with the toothed ring (16). A vertical strip hole is opened through one side of the groove. The top end of the special-shaped fixing rod (18) passes through the strip hole and is fixedly connected to the slider (14). The bottom end of the special-shaped fixing rod (18) is fixedly connected to the end of the rack (17) near the arc plate (13).

7. The portable steel bar welding device for fireproof window construction according to claim 6, characterized in that: A magnetic block (20) is fixedly connected to the top of the end of the connecting rod (7) away from the hook rod (3), and when the hook rod (3) and the welding gun (1) are in a facing position, the magnetic block (20) can just be attracted together with the rack (17).

8. The portable steel bar welding device for fireproof window construction according to claim 7, characterized in that: A stop (21) is provided on the side of the rack (17) away from the magnet (20). The stop (21) is fixedly connected to the bottom of the fixing block (10), and the stop (21) is slidably installed on the side of the rack (17) away from the magnet (20).

9. The portable steel bar welding device for fireproof window construction according to claim 8, characterized in that: The teeth (19) can drive the toothed ring (16) to rotate half a turn, and when the second electric push rod (15) is fully shortened, the teeth (19) on the rack (17) can maintain engagement with the toothed ring (16), and at this time the horizontal sections of the connecting rod (7) and the hook rod (3) can be retracted into the bottom area of ​​the two mounting plates (2).

10. The portable steel bar welding device for fireproof window construction according to claim 9, characterized in that: The top of the hook rod (3) is higher than the height of the free end of the welding torch (1), and when the second electric push rod (15) is fully shortened, the vertical section of the hook rod (3) can keep in contact with the side of the mounting plate (2) near the adjusting screw (12).

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