Welding method and auxiliary device for unsmooth and straight metal gutter cap of old factory building

Abstract

The invention relates to building construction, in particular to an old plant unsmooth and straight metal gutter cap welding method and auxiliary device.The auxiliary device comprises a protective shell, an adjusting assembly is arranged on the inner side of the protective shell, auxiliary moving assemblies are arranged at the two ends of the adjusting assembly, and the adjusting assembly comprises a gear rotationally connected to the inner side of the protective shell; a sliding groove is fixedly connected to the inner wall of the protective shell, and a rack is slidably connected to the inner side of the sliding groove and slidably connected to the inner side of the protective shell. The device can replace manpower to correct the gutter, the linear precision and welding quality of the gutter are effectively ensured while the manual adjustment difficulty and cost are remarkably reduced, and therefore the construction efficiency is comprehensively improved, and the device is easy to operate, convenient and fast to use, capable of meeting various requirements in the actual use process, easy to produce, low in cost and suitable for popularization and application. And popularization and investment are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and particularly to a welding method and an auxiliary device for the non-straight metal gutter cap of an old factory building. Background Art

[0002] The renovation of traditional continuous concrete bent frame factories is widely implemented in various industrial and civil buildings. However, during the renovation of the roof system, there are many uncontrollable factors in the gutter installation link, especially facing technical difficulties.

[0003] Specifically, when installing the inner lining metal gutter, due to the straightness deviation of the original concrete double gutter, problems such as misalignment of the metal gutter and non-straight line shape often occur, which makes it difficult to directly weld and fix the U-shaped cap. Such problems not only seriously affect the construction efficiency but also pose potential hazards to the overall quality and durability of the roof system.

[0004] In view of the above technical bottlenecks of non-straight installation of the metal gutter and difficult cap welding, the present invention replaces the traditional manual prying and positioning operations with a mechanical transmission method. Through the coordinated action of the gear and the rack, the stable and synchronous lifting and contraction of the gutter are achieved. While significantly reducing the difficulty and cost of manual adjustment, the linear accuracy and welding quality of the gutter are effectively ensured, thereby comprehensively improving the construction efficiency and ensuring the overall performance and long-term durability of the roof system. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem in the prior art that the straightness deviation of the concrete gutter makes it difficult to align the metal gutter, resulting in difficulty in welding the cap.

[0006] The technical solution of the present invention: An auxiliary device for welding the non-straight metal gutter cap of an old factory building includes a protective shell. An adjustment component is arranged inside the protective shell. Auxiliary moving components are arranged at both ends of the adjustment component. The adjustment component includes a gear rotatably connected inside the protective shell. A chute is fixedly connected to the inner wall of the protective shell. A rack is slidably connected inside the chute. The rack is slidably connected inside the protective shell. The number of the racks is set to two. The two racks are arranged in a circumferential array about the vertical center line of the gear. Both of the two racks are meshed with the gear.

[0007] Optionally, a handle is fixedly connected to the top of the gear. Connecting frames are fixedly connected to the mutually remote ends of the two racks. A U-shaped card slot is fixedly connected to one end of the connecting frame. The U-shaped card slot is arranged in a "冂"-shaped contour.

[0008] Optionally, a cross beam is fixedly connected to the top of the protective shell. The handle is rotatably connected inside the cross beam. Limiting inner beams are slidably connected to both ends of the cross beam.

[0009] Optionally, the groove is configured with a concave outline, and the bottom of the limiting inner beam is configured with an arc-shaped outline.

[0010] Optionally, a first limiting member is fixedly connected to the top of the inner limiting beam, and a second limiting member is fixedly connected to the end of the inner limiting beam away from the crossbeam.

[0011] Optionally, a limiting frame is fixedly connected to the top of the U-shaped slot, and the limiting frame is slidably connected to the outside of the limiting inner beam.

[0012] Optionally, a pulley is rotatably connected to the inner side of the limiting frame, and the pulley contacts the inner limiting beam.

[0013] Optionally, the auxiliary moving component includes a positioning post fixedly connected to one side of the U-shaped slot, a frame slidably connected to the outside of the positioning post, and the frame slidably connected inside the U-shaped slot.

[0014] Optionally, a sliding roller is rotatably connected to the inner side of the frame, and an adjusting screw is rotatably connected to one side of the U-shaped slot. The adjusting screw is threadedly connected to the frame.

[0015] This invention also provides a method for welding non-straight metal gutter caps in old factory buildings, comprising the following steps: Gutter correction: By connecting the U-shaped slots at both ends of the device to the sidewalls of two adjacent gutters, and by rotating the handle to bring the U-shaped slots on both sides closer or further apart, the two gutters are adjusted until they are aligned. Beveling preparation: The thickness depends on the gutter material: For plates with a thickness of < 3mm: with or without beveling, use straight edge butt joints, but a gap must be reserved; For plates thicker than or equal to 3mm: V-shaped or X-shaped bevels should be made to ensure full penetration, with the bevel angle within the required range; Cleaning: Use an angle grinder with a stainless steel wire brush or sandpaper to thoroughly clean the oil, rust, paint, and galvanized layer on both sides of the weld until the metal luster is exposed. welding: Adjust the welding machine parameters (voltage, current, wire feed speed) according to the thickness of the gutter plate, first test weld on the scrap material, and adjust the protective gas flow rate to the required range; Welding from the middle to both ends: In order to reduce welding stress deformation, start from the middle of the gutter joint and weld in sections towards both ends, using segmented skip welding: weld each section before welding the other end, allowing the heat time to dissipate and effectively controlling deformation. Posture: Keep the welding torch at a certain angle to the gutter plane and use the leftward welding method (suitable for thin plates); Handling the molten metal: Move forward in a straight line or with slight swaying, at a constant speed, and pay close attention to the state of the molten pool to ensure that the base materials on both sides are fully fused together; Welding pass: One pass is sufficient; if the plate is thick, multiple passes may be required. test: Cleaning weld spatter: Use a slag hammer and wire brush to remove weld spatter and spatter from the weld surface; Weld grinding: Use an angle grinder with louvers or a grinding wheel to grind the excess weld height flat, so that it transitions smoothly with the inner wall of the gutter, ensuring smooth drainage and preventing debris accumulation; Leakage test: Water spray test, water is sprayed directly onto the weld to simulate heavy rain and check for leakage; Corrosion protection (for carbon steel): Carefully apply zinc-rich primer and anti-corrosion topcoat with a similar color to the gutter to the weld area and the area where the galvanized layer has been ground off. The paint film thickness must meet the requirements.

[0016] In summary, this application includes at least one of the following beneficial technical effects: The device of this invention is lightweight and easy to operate, and can be quickly mastered and used by ordinary field workers. It is highly safe and requires no additional training or complex skills. Compared with the traditional method that relies on manual prying, this device saves time and effort through mechanical transmission and can achieve precise control of gutter displacement, significantly improving the correction accuracy. Furthermore, this device effectively ensures the straightness of the gutter and the quality of welding while significantly improving construction efficiency, achieving a dual optimization of quality and efficiency. The device has low manufacturing cost, a clear and reliable principle, and smoothly drives the gutter to move and correct itself through rack and pinion transmission, providing ideal conditions for subsequent welding. It is easy to promote and use on construction sites, and the auxiliary moving components can further improve the flexibility of the device and increase its ease of use.

[0017] In summary, this invention can replace manual labor for gutter straightening, significantly reducing the difficulty and cost of manual adjustment while effectively ensuring the straightness accuracy and welding quality of the gutter, thereby comprehensively improving construction efficiency. Moreover, this device is simple to operate and convenient to use, and can meet various needs in actual use. Furthermore, this device is easy to manufacture, has low cost, and is conducive to popularization and investment. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of the welding auxiliary device for the non-straight metal gutter cap in the old factory building; Figure 2 A sectional view of the top structure of the welding auxiliary device for the non-straight metal gutter cap in the old factory building; Figure 3A schematic diagram of the front structure of the welding auxiliary device for the non-straight metal gutter cap in the old factory building; Figure 4 A partial structural cross-sectional view of the welding auxiliary device for the non-straight metal gutter cap in the old factory building; Figure 5 for Figure 4 Enlarged view of the A-section structure; Figure 6 for Figure 4 Enlarged view of the structure of part B.

[0019] Figure label: 1. Protective shell; 2. Gear; 3. Slide groove; 4. Rack; 5. Handle; 6. Connecting frame; 7. U-shaped slot; 8. Crossbeam; 9. Inner limiting beam; 10. First limiting component; 11. Second limiting component; 12. Limiting frame; 13. Pulley; 14. Positioning column; 15. Frame body; 16. Sliding roller; 17. Adjusting screw. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0022] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified or limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] Embodiment 1: As <> Figures 1-6 shown, a welding assistance device for the non-straight metal gutter cap of an old factory building includes a protective shell 1. An adjustment component is arranged inside the protective shell 1, and auxiliary moving components are arranged at both ends of the adjustment component. The adjustment component includes a gear 2 rotatably connected inside the protective shell 1. A chute 3 is fixedly connected to the inner wall of the protective shell 1. A rack 4 is slidably connected inside the chute 3. The sliding of the rack 4 is limited by the chute 3, so that the rack 4 performs a linear displacement inside the chute 3. The rack 4 is slidably connected inside the protective shell 1. The number of racks 4 is set to two, and the two racks 4 are arranged in a circumferential array about the vertical center line of the gear 2. Both of the two racks 4 are meshed with the gear 2.

[0026] A handle 5 is fixedly connected to the top of the gear 2. The handle 5 is arranged in a "Z" - shaped profile to facilitate the rotation of the gear 2 through the handle 5. Connecting frames 6 are fixedly connected to the mutually - remote ends of the two racks 4. A U - shaped card slot 7 is fixedly connected to one end of the connecting frame 6. The U - shaped card slot 7 is arranged in a "冂" - shaped profile. A cross - beam 8 is fixedly connected to the top of the protective shell 1. The handle 5 is rotatably connected inside the cross - beam 8. Limiting inner beams 9 are slidably connected to both ends of the cross - beam 8. The cross - beam 8 and the limiting inner beams 9 can improve the overall rigidity of the device and avoid deformation. The chute 3 is arranged in a "concave" - shaped profile. The bottom of the limiting inner beam 9 is arranged in an arc - shaped profile. A first limiting member 10 is fixedly connected to the top of the limiting inner beam 9. A second limiting member 11 is fixedly connected to the end of the limiting inner beam 9 far from the cross - beam 8. A limiting frame 12 is fixedly connected to the top of the U - shaped card slot 7. The limiting frame 12 is slidably connected to the outside of the limiting inner beam 9. A pulley 13 is rotatably connected to the inside of the limiting frame 12. The pulley 13 contacts the limiting inner beam 9. The contact between the pulley 13 and the limiting inner beam 9 can reduce the friction between the limiting frame 12 and the limiting inner beam 9 when the limiting frame 12 is displaced outside the limiting inner beam 9 through the rotation of the pulley 13.

[0027] In this embodiment, when correcting two adjacent metal gutters, two U-shaped slots 7 are fitted onto the sidewalls of the two adjacent gutters, thus completing the connection between the device and the two gutters. By rotating the handle 5, the gear 2 is rotated, which in turn drives the two racks 4 to move synchronously, causing the two U-shaped slots 7 to move away from or towards each other, so as to correct and adjust the two gutters. At the same time, the limiting frame 12 slides synchronously on the outside of the limiting inner beam 9. The cooperation between the limiting frame 12 and the limiting inner beam 9 can improve the stability of the U-shaped slots 7. When the sliding position of the limiting frame 12 exceeds the length of the limiting inner beam 9, the limiting frame 12 contacts the second limiting member 11 and can drive the limiting inner beam 9 to slide out from the inside of the crossbeam 8 through the limiting of the second limiting member 11, thereby extending the length between the crossbeam 8 and the limiting inner beam 9. Conversely, after the length of the crossbeam 8 and the limiting inner beam 9 is extended, the limiting frame 12 contacts the first limiting member 10. When the device is in use, the inner limiting beam 9 can slide inward toward the inner side of the crossbeam 8 to reduce the distance, thereby increasing the movable space of the U-shaped slot 7. At the same time, the telescopic design of the crossbeam 8 and the inner limiting beam 9 allows the device to meet usage requirements while reducing its footprint when not in use, making it easy to store. After adjusting the two gutters into place, the tie rods are welded to ensure the gutters are straight. Then, the device is pushed forward along the gutters, and the same adjustment and welding are performed on the next section. After a section of the gutters is aligned and the tie rods are welded, the entire metal gutter cap can be flipped onto the gutter for cap welding. This replaces manual gutter alignment, significantly reducing the difficulty and cost of manual adjustment while effectively ensuring the straightness accuracy and welding quality of the gutter, thereby comprehensively improving construction efficiency and ensuring the overall performance and long-term durability of the roofing system. Moreover, this device is easy to manufacture, has low cost, and is conducive to widespread adoption and investment.

[0028] Example 2: The auxiliary moving component includes a positioning column 14 fixedly connected to one side of the U-shaped slot 7. The positioning column 14 positions the frame 15, improving the overall stability of the frame 15. The frame 15 is slidably connected to the outer side of the positioning column 14. The frame 15 is slidably connected to the inside of the U-shaped slot 7. A sliding roller 16 is rotatably connected to the inner side of the frame 15. An adjusting screw 17 is rotatably connected to one side of the U-shaped slot 7. The adjusting screw 17 is threadedly connected to the frame 15.

[0029] In this embodiment, after the gutter section is straightened and the tie rod is welded, when the pushing device is moved on the gutter, the adjusting screws 17 on both sides of the U-shaped slots 7 can be rotated to move the frame 15 towards the inside of the U-shaped slots 7, so that the two sliding rollers 16 on the inside of the frame 15 contact the sidewall of the gutter. The adjusting screws 17 are continuously rotated until the sliding rollers 16 are in close contact with the sidewall of the gutter. At this time, the gutter and the inner wall of the U-shaped slots 7 gradually lose contact or the tightness of the contact decreases. As the device is moved on the gutter to a position close to the one to be straightened, the U-shaped slots 7 and the gutter sidewalls... As the walls gradually come into close contact, the friction between the U-shaped groove 7 and the gutter sidewall becomes high, which can make the device difficult to move or cause friction damage to the gutter and U-shaped groove 7. By making the sliding roller 16 contact the gutter sidewall, the contact between the U-shaped groove 7 and the gutter sidewall is reduced. Thus, when moving the device, the rotation of the sliding roller 16 can effectively reduce the friction between the U-shaped groove 7 and the gutter, making it easier to move the device and avoiding damage to the U-shaped groove 7 and the gutter. This facilitates the transfer of the device to meet various needs in actual use.

[0030] This invention also provides a method for welding non-straight metal gutter caps in old factory buildings, comprising the following steps: Gutter correction: By connecting the U-shaped slots 7 at both ends of the device to the sidewalls of two adjacent gutters respectively, and by rotating the handle 5 to bring the U-shaped slots 7 on both sides closer or further apart, the two gutters are adjusted until they are aligned. Beveling preparation: The thickness depends on the gutter material: For plates with a thickness of < 3mm: beveling is not required; straight-edge butt joints can be used, but a gap of 1-2mm must be reserved. For plates thicker than 3mm: it is recommended to open a V-shaped or X-shaped bevel to ensure full penetration. The bevel angle is generally around 60°. Cleaning: Use an angle grinder with a stainless steel wire brush or sandpaper to thoroughly clean the oil, rust, paint, and galvanized layer within a range of at least 20mm on both sides of the weld until the metal luster is exposed. This is the key to avoiding porosity and slag inclusions. welding: Adjust the welding machine parameters (voltage, current, wire feed speed) according to the gutter plate thickness. It is recommended to test weld on scrap material first, using a shielding gas (usually 75% Ar + 25% C). Adjust the flow rate to 15-20 L / min; Welding from the middle to both ends: In order to reduce welding stress deformation, welding should start from the middle of the gutter joint and proceed in sections towards both ends. Use segmented skip welding, and do not weld a long seam continuously at once. Instead, weld each section (about 50-100mm) and then skip to another section to allow the heat to dissipate and effectively control deformation. Posture: Keep the welding torch at an angle of 80-85° to the gutter plane and use the leftward welding method (suitable for thin plates); Handling the molten metal: Move forward in a straight line or with slight swaying, at a constant speed, and pay close attention to the state of the molten pool to ensure that the base materials on both sides are fully fused together; Welding: Usually one pass is sufficient to complete the weld. If the plate is thick, multiple passes may be required. test: Cleaning weld spatter: Use a slag hammer and wire brush to remove weld spatter and spatter from the weld surface; Weld grinding: Use an angle grinder with louvers or a grinding wheel to grind the excess weld height flat, so that it transitions smoothly with the inner wall of the gutter, ensuring smooth drainage and preventing debris accumulation; Leakage test: Water spray test, water is sprayed directly onto the weld to simulate heavy rain and check for leakage; Corrosion protection (for carbon steel): Carefully apply zinc-rich primer and anti-corrosion topcoat with a similar color to the gutter to the weld area and the area where the galvanized layer has been ground off. The paint film thickness must meet the requirements.

[0031] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A welding auxiliary device for non-straight metal gutter caps in old factory buildings, comprising a protective shell (1), characterized in that: An adjustment component is provided on the inner side of the protective case (1), and auxiliary movement components are provided at both ends of the adjustment component. The adjustment component includes a gear (2) rotatably connected to the inner side of the protective case (1). An inner wall of the protective case (1) is fixedly connected with a chute (3), and a rack (4) is slidably connected to the inner side of the chute (3). The rack (4) is slidably connected to the inner side of the protective case (1). The number of the racks (4) is set to two, and the two racks (4) are arranged in a circumferential array about the vertical center line of the gear (2). Both of the two racks (4) are meshed with the gear (2).

2. The auxiliary device for welding non-straight metal gutter caps in old factory buildings according to claim 1, characterized in that, A handle (5) is fixedly connected to the top of the gear (2). Connecting frames (6) are fixedly connected to one ends of the two racks (4) away from each other. A U-shaped card slot (7) is fixedly connected to one end of the connecting frame (6). The U-shaped card slot (7) is provided with a "冂"-shaped contour.

3. The auxiliary device for welding non-straight metal gutter caps in old factory buildings according to claim 2, characterized in that, A cross beam (8) is fixedly connected to the top of the protective case (1). The handle (5) is rotatably connected to the inside of the cross beam (8). Limiting inner beams (9) are slidably connected to both ends of the cross beam (8).

4. The auxiliary device for welding non-straight metal gutter caps in old factory buildings according to claim 3, characterized in that, The chute (3) is provided with a "凹"-shaped contour. The bottom of the limiting inner beam (9) is provided with an arc-shaped contour.

5. The auxiliary device for welding non-straight metal gutter caps in old factory buildings according to claim 3, characterized in that, A first limiting member (10) is fixedly connected to the top of the limiting inner beam (9). A second limiting member (11) is fixedly connected to one end of the limiting inner beam (9) away from the cross beam (8).

6. The auxiliary device for welding non-straight metal gutter caps in old factory buildings according to claim 4, characterized in that, A limiting frame (12) is fixedly connected to the top of the U-shaped card slot (7). The limiting frame (12) is slidably connected to the outside of the limiting inner beam (9).

7. The auxiliary device for welding non-straight metal gutter caps in old factory buildings according to claim 6, characterized in that, A pulley (13) is rotatably connected to the inside of the limiting frame (12). The pulley (13) contacts the limiting inner beam (9).

8. The auxiliary device for welding non-straight metal gutter caps in old factory buildings according to claim 2, characterized in that, The auxiliary movement component includes a positioning column (14) fixedly connected to one side of the U-shaped card slot (7). A frame body (15) is slidably connected to the outside of the positioning column (14). The frame body (15) is slidably connected to the inside of the U-shaped card slot (7).

9. The auxiliary device for welding non-straight metal gutter caps in old factory buildings according to claim 8, characterized in that, A sliding roller (16) is rotatably connected to the inside of the frame body (15). An adjusting screw rod (17) is rotatably connected to one side of the U-shaped card slot (7). The adjusting screw rod (17) is threadedly connected to the frame body (15).

10. A method for welding non-straight metal gutter caps in old factory buildings, applied to the auxiliary device for welding non-straight metal gutter caps in old factory buildings according to claims 2-9, characterized in that, Including the following steps: Gutter correction: By sleeving the U-shaped card slots (7) at both ends of the device on the side walls of two adjacent gutters respectively, and rotating the handle (5) to make the two U-shaped card slots (7) approach or move away from each other, the two gutters are adjusted until the two gutters are butted consistently; Groove preparation: Decided according to the thickness of the gutter plate: Plate thickness < 3mm: Groove may or may not be opened, straight-edge butt joint is adopted, but a gap needs to be reserved; Plate thickness ≥ 3mm: V-shaped or X-shaped groove is opened to ensure full penetration, and the groove angle is within the required range; Cleaning: Using an angle grinder with a stainless steel wire brush or sandpaper, thoroughly polish the oil stains, rust, paint, and galvanized layer on both sides of the weld until the metal luster is exposed; Welding: Adjust the welding machine parameters (voltage, current, wire feeding speed) according to the gutter plate thickness. First, weld on the waste material, and adjust the shielding gas flow rate to the required range; Welding from the middle to both ends: In order to reduce welding stress deformation, start from the middle of the gutter joint and weld in sections towards both ends, using segmented skip welding: weld each section before welding the other end, allowing the heat time to dissipate and effectively controlling deformation. Posture: Keep the welding torch at a certain angle to the gutter plane and use the leftward welding method (suitable for thin plates); Handling the molten metal: Move forward in a straight line or with slight swaying, at a constant speed, and pay close attention to the state of the molten pool to ensure that the base materials on both sides are fully fused together; Welding: Completed in one pass; if the plate is thick, multiple passes are required. test: Cleaning weld spatter: Use a slag hammer and wire brush to remove weld spatter and spatter from the weld surface; Weld grinding: Use an angle grinder with louvers or a grinding wheel to grind the excess weld height flat, so that it transitions smoothly with the inner wall of the gutter, ensuring smooth drainage and preventing debris accumulation; Leakage test: Water spray test, water is sprayed directly onto the weld to simulate heavy rain and check for leakage; Corrosion protection (for carbon steel): Carefully apply zinc-rich primer and anti-corrosion topcoat with a similar color to the gutter to the weld area and the area where the galvanized layer has been ground off. The paint film thickness must meet the requirements.

Images