Pre-welding preheating device for flat seam of heavy machinery steel plate

Abstract

The utility model discloses a heavy machinery steel plate flat seam pre-welding preheating device which comprises a rack, trundles, an induction heater, a heating belt and a lifting mechanism, the trundles are arranged at four corners of the bottom of the rack, a fixing plate is arranged in the middle of the rack, the induction heater is arranged on the fixing plate, the heating belt is arranged on the fixing plate, and the lifting mechanism is arranged on the rack. The lifting mechanism is arranged at the bottom of the fixing plate, the heating belt is arranged at the bottom of the lifting mechanism, and the heating belt is connected with the induction heater through a power line. According to the preheating device before welding, the movable rack drives the induction heater and the heating belt to move along the flat seam, and the lifting mechanism drives the heating belt to ascend and descend so that the heating belt can make contact with or be separated from the flat seam, so that continuous preheating of the flat seam is achieved, the labor intensity of workers is relieved, and the working efficiency is improved. And the preheating efficiency of the flat joint and the subsequent welding efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding preheating, and particularly relates to a preheating device for flat seam welding of heavy machinery steel plates before welding. Background Art

[0002] In the production and manufacturing process of heavy machinery equipment such as bridges, ships, offshore platforms, and mining machinery, it is often necessary to weld the joints between various steel plates. Since the steel plates used in heavy machinery are relatively thick, preheating is required before welding to reduce the temperature difference between the weld metal and the base metal, reduce stress concentration, prevent crack generation, and improve welding quality and performance.

[0003] Among them, before the flat seam welding of steel plates, currently in the industry, a heating tape is generally used to preheat the weld seam. For example, the portable welding heat treatment heating tape disclosed in patent CN215647466U is directly placed on the straight weld bead during use, and the metal is heated by the heat generated by the induction cable. However, this heating method requires manual laying of the heating tape at the weld seam, and after preheating, the heating tape needs to be retracted and laid at the next weld seam. When the weld seam is long or the number is large, this manual laying and transferring method of the heating tape is extremely inefficient, seriously affecting the weld preheating and subsequent welding efficiency, so it needs to be improved. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model discloses a preheating device for flat seam welding of heavy machinery steel plates before welding, which includes a frame, casters, an induction heater, a heating tape, and a lifting mechanism. The casters are arranged at the four corners of the bottom of the frame. A fixed plate is provided at the middle position of the frame. The induction heater is arranged on the fixed plate. The lifting mechanism is arranged at the bottom of the fixed plate. The heating tape is arranged at the bottom of the lifting mechanism. The heating tape is connected to the induction heater through a power cord.

[0005] Further, the lifting mechanism includes a driving unit, a sliding plate, a buffer unit, and a connecting plate. One end of the driving unit is fixedly connected to the bottom of the fixed plate, and the other end is connected to the sliding plate. The connecting plate is movably arranged at the bottom of the sliding plate through the buffer unit. The heating tape is arranged at the bottom of the connecting plate.

[0006] Further, sliding rails are provided on the inner walls of both sides of the frame, and both ends of the sliding plate are slidably connected to the sliding rails through sliders.

[0007] Further, a lifting switch is provided on the side wall of the frame, and the lifting switch is electrically connected to the driving unit through an electrical signal.

[0008] Further, a handrail is also provided on one side of the frame.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The pre-welding heating device of the present utility model drives the induction heater and the heating belt to move along the flat seam through a movable frame, and drives the heating belt to lift through a lifting mechanism, so that it contacts or disengages from the flat seam, thereby realizing continuous preheating of the flat seam, reducing the labor intensity of the staff, and improving the preheating efficiency of the flat seam and the subsequent welding efficiency. Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a side view of the overall structure of the present utility model;

[0013] Figure 2 It is a top view of the partial structure of the present utility model.

[0014] Reference Signs:

[0015] 1 - Frame, 2 - Caster, 3 - Induction Heater, 4 - Heating Belt, 5 - Handrail, 6 - Fixed Plate, 7 - Driving Unit, 8 - Sliding Plate, 9 - Buffer Unit, 10 - Connecting Plate, 11 - Slide Rail, 12 - Slide Block, 13 - Power Cord, 14 - Lifting Switch. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments.

[0017] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0018] In the description of the embodiments, unless otherwise clearly specified and limited, terms such as "set" and "connected" 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 connected through an intermediate medium, and it can also be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0019] As Figure 1-2 shown, the preheating device for the flat seam welding of heavy machinery steel plates in this embodiment includes a frame 1, casters 2, an induction heater 3, a heating belt 4, and a lifting mechanism. The casters 2 are arranged at the four corners of the bottom of the frame 1. An armrest 5 is also provided on one side of the frame 1 to facilitate the movement of the frame 1. The casters 2 can be self-locking universal wheels to facilitate locking the position of the frame 1.

[0020] A fixing plate 6 is provided at the middle position of the frame 1, and the induction heater 3 is arranged on the fixing plate 6. Among them, the induction heater 3 can adopt the PWHT700 series digital intelligent induction heater.

[0021] The lifting mechanism is arranged at the bottom of the fixing plate 6. The lifting mechanism includes a driving unit 7, a sliding plate 8, a buffer unit 9, and a connecting plate 10. One end of the driving unit 7 is fixedly connected to the bottom of the fixing plate 6, and the other end is connected to the sliding plate 8. Slide rails 11 are provided on the inner walls of both sides of the frame 1, and both ends of the sliding plate 8 are slidably connected to the slide rails 11 through sliders 12. The connecting plate 10 is movably arranged at the bottom of the sliding plate 8 through the buffer unit 9. The heating belt 4 is arranged at the bottom of the connecting plate 10, and the heating belt 4 is connected to the induction heater 3 through a power cord 13.

[0022] A lifting switch 14 is provided on the side wall of the frame 1. The lifting switch 14 is electrically connected to the driving unit 7. By operating the lifting switch 14, the driving unit 7 can be controlled to act, thereby driving the sliding plate 8, the connecting plate 10, and the heating belt 4 to move up and down integrally, so that the heating belt 4 contacts or separates from the flat seam, facilitating the preheating of the flat seam before welding.

[0023] Among them, the driving unit 7 can adopt common linear driving methods in the field such as cylinders, oil cylinders, and linear modules, and the buffer unit 9 can adopt buffer structures used in the field such as gas springs, hydraulic springs, and ordinary metal springs.

[0024] When using this preheating device, the staff can push the frame 1 to walk above the flat seam to be welded. When preheating a certain flat seam, the staff presses the down button of the lifting switch 14, so that the driving unit 7 drives the heating belt 4 to move downward and fit on the surface of the flat seam. At the same time, the buffer unit 9 buffers, so that an appropriate pressure is maintained between the heating belt 4 and the flat seam.

[0025] The induction heater 3 starts to work, preheating the area around the flat seam through the heating belt 4. After reaching the set preheating time, the induction heater 3 stops working. At this time, the operator presses the upward button of the lifting switch 14, and the driving unit 7 drives the heating belt 4 to move upward, disengaging it from the flat seam. Then, the rack 1 is continuously pushed to the next position where welding preheating is required, thus realizing the continuous preheating of the flat seam, which not only reduces the labor intensity of the operator but also improves the preheating efficiency of the flat seam and the subsequent welding efficiency.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement; when the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

Claims

1. A preheating device for flat seam welding of heavy machinery steel plates, characterized in that: It includes a frame, casters, an induction heater, a heating belt and a lifting mechanism. The casters are arranged at the four corners of the bottom of the frame. A fixing plate is provided at the middle position of the frame. The induction heater is arranged on the fixing plate. The lifting mechanism is arranged at the bottom of the fixing plate. The heating belt is arranged at the bottom of the lifting mechanism. The heating belt is connected to the induction heater through a power cord.

2. The preheating device for butt welding of heavy machinery steel plates according to claim 1, wherein: The lifting mechanism includes a driving unit, a sliding plate, a buffer unit and a connecting plate. One end of the driving unit is fixedly connected to the bottom of the fixing plate, and the other end is connected to the sliding plate. The connecting plate is movably arranged at the bottom of the sliding plate through the buffer unit. The heating belt is arranged at the bottom of the connecting plate.

3. The preheating device for butt welding of heavy machinery steel plates according to claim 2, characterized in that: Sliding rails are provided on the inner walls of both sides of the frame. Both ends of the sliding plate are slidably connected to the sliding rails through sliders.

4. The preheating device for butt welding of heavy machinery steel plates according to claim 2, characterized in that: A lifting switch is provided on the side wall of the frame. The lifting switch is electrically connected to the driving unit through an electrical signal.

5. The preheating device for butt welding of heavy machinery steel plates according to claim 1, characterized in that: A handrail is also provided on one side of the frame.

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