Pre-welding preheating device

Abstract

The utility model discloses a kind of pre-welding preheating devices, including support plate, support pipe, overturning connecting mechanism and two heating mechanisms, wherein, support pipe is set on support plate, and is set through support plate, two heating mechanisms are rotatably connected on support pipe by overturning connecting mechanism, overturning connecting mechanism includes first rotating assembly, first drive mechanism and adjusting assembly, wherein, first rotating assembly is rotatably connected on support pipe, adjusting assembly is movably connected on first rotating assembly, first drive mechanism is set on support plate, and located below first rotating assembly. Thus, adopt double-side dynamic or static mode to spray out flame heating, flame position and direction can be adjusted, suitable for the uniform preheating of different parts structure, reduce staff frequent operation, reduce work intensity, improve welding quality.

Description

Technical Field

[0001] This utility model relates to the technical field of welding equipment, and in particular to a preheating device for welding. Background Technology

[0002] Preheating devices are equipment used to heat workpieces before welding, aiming to reduce the cooling rate during welding, reduce residual stress, prevent cold cracking, and improve the microstructure of weld metal.

[0003] In related technologies, preheating devices for welding typically employ methods such as flame preheating, electric heating, infrared preheating, and hot air preheating. Among these, flame preheating is suitable for local preheating or pre-welding treatment of small and medium-sized parts.

[0004] Existing preheating devices that use flame heating are usually handheld, relying on manual adjustment of the heating position. The heating method is also limited and cannot meet the uniform heating requirements of parts with different shapes. Prolonged handheld heating operations can easily cause physical fatigue for workers, resulting in uneven distribution of flame heat, high residual stress on parts, easy deformation, and affecting welding quality. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, the purpose of this utility model is to propose a preheating device for welding, which uses a dual-sided dynamic or static method to spray flames for heating. The position and direction of the flames are adjustable, making it suitable for uniform preheating of different parts structures, reducing the frequency of operation by workers, reducing workload, and improving welding quality.

[0007] To achieve the above objectives, this utility model proposes a preheating device for welding, comprising a support plate, a support tube, a flipping connection mechanism, and two heating mechanisms. The support tube is disposed on the support plate and extends through the support plate. The two heating mechanisms are rotatably connected to the support tube via the flipping connection mechanism. The flipping connection mechanism includes a first rotating component, a first driving mechanism, and an adjusting component. The first rotating component is rotatably connected to the support tube, and the adjusting component is movably connected to the first rotating component. The first driving mechanism is disposed on the support plate and located below the first rotating component.

[0008] This utility model discloses a preheating device for welding common parts such as plates and pipes. It utilizes a flipping connection mechanism to dynamically or statically support two heating mechanisms. A first driving mechanism drives a first rotating component to rotate, which in turn drives the two heating mechanisms to rotate. At the same time, an adjusting component adjusts the distance between the two heating mechanisms to achieve dynamic heating of the inner or outer sides of pipes of different diameters, or to directly distribute the two heating mechanisms on the upper and lower sides of the weld to achieve static heating of the steel plate. This allows the flame to act evenly on the welding points of different parts, reducing the frequency of operator operations, lowering the workload, and improving welding quality.

[0009] In addition, the preheating device for welding proposed above according to this utility model may also have the following additional technical features:

[0010] Specifically, the first rotating assembly includes a connecting box, a first rotating joint, and a driving disk. The driving disk is disposed on the support tube through the connecting box, and the driving disk has two symmetrically arranged limiting grooves. The first rotating joint is disposed on the connecting box and located inside the support tube.

[0011] Specifically, the adjustment assembly includes two symmetrically arranged sliding plates, a stud, and two symmetrically arranged adjusting nuts. The stud is rotatably connected to the two symmetrically arranged limiting grooves. The two symmetrically arranged adjusting nuts are disposed on the stud and are respectively located in the two symmetrically arranged limiting grooves. The two symmetrically arranged sliding plates are movably connected to the limiting grooves and are threadedly connected to the stud.

[0012] Specifically, the heating mechanism includes a second rotary joint, a pressure pipe, and multiple heating devices. The pressure pipe is rotatably connected to the slide plate via the second rotary joint, and the second rotary joint is connected to the communicating box via a pipeline. The multiple heating devices are disposed on the pressure pipe and are arranged at equal intervals along the axial direction of the pressure pipe.

[0013] Specifically, the first driving mechanism includes a first driving device and a driving wheel. The first driving device is disposed on the support plate, and the driving wheel is disposed at the output end of the first driving device and located below the driving disk, and in contact with the outer circumferential side of the driving disk.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0016] Figure 1 This is a schematic diagram of the overall structure of the preheating device for welding according to this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the support plate and support pipe of the preheating device for welding of this utility model.

[0018] Figure 3 This is a schematic diagram of the internal structure of the preheating device for welding according to this utility model;

[0019] Figure 4 for Figure 3 An enlarged schematic diagram of the structure in area A.

[0020] As shown in the figure: 1. Support plate; 2. Support tube; 3. Flipping connection mechanism; 31. First rotating component; 311. Connecting box; 312. First rotary joint; 313. Drive disk; 3131. Limiting groove; 32. First drive mechanism; 321. First drive device; 322. Drive wheel; 33. Adjustment component; 331. Slide plate; 332. Stud; 333. Adjusting nut; 4. Heating mechanism; 41. Second rotary joint; 42. Pressure tube; 43. Heating device. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0022] The preheating device for welding according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0023] like Figures 1-4 As shown, the preheating device for welding according to this utility model embodiment may include a support plate 1, a support tube 2, a flipping connection mechanism 3, and two heating mechanisms 4.

[0024] The support tube 2 is mounted on the support plate 1 and extends through the support plate 1. The two heating mechanisms 4 are rotatably connected to the support tube 2 through the flipping connection mechanism 3.

[0025] It should be noted that the support plate 1 can stably support the support tube 2 and the flipping connection mechanism 3, and indirectly stably support the two heating mechanisms 4 through the flipping connection mechanism 3.

[0026] The flipping connection mechanism 3 includes a first rotating component 31, a first driving mechanism 32, and an adjusting component 33.

[0027] The first rotating component 31 is rotatably connected to the support tube 2, the adjusting component 33 is movably connected to the first rotating component 31, and the first driving mechanism 32 is disposed on the support plate 1 and located below the first rotating component 31.

[0028] It should be noted that the first rotating component 31 is used for external air intake connection to deliver combustible gas to the heating mechanism 4, while also satisfying the rotation operation of the drive disk 313. The adjusting component 33 adjusts the opposing movement of the two heating mechanisms 4 to change the distance between the two heating mechanisms 4.

[0029] Specifically, during the preheating process before actual welding, relevant personnel move the device to the welding location. A drive device for vertical or horizontal adjustment can be installed at the bottom of the support plate 1, along with casters to facilitate device movement and adjustment. The spacing and height of the two heating mechanisms 4 are adjusted according to the shape of the part and the welding position. In the initial state, the two heating mechanisms 4 are symmetrically distributed vertically and close to each other. The external combustible gas pipeline is connected through the first rotating component 31, and the combustible gas is transported to the two heating mechanisms 4 through the pipeline. The heating mechanism 4 sprays out combustible gas, and at the same time, a pulse igniter is used to ignite the flame positions at various locations. To avoid ignition leakage, the gas outlets of the two heating mechanisms 4 are in a relative position. When one gas outlet is ignited, it can ignite the gas outlet at the opposite point, reducing the occurrence of ignition leakage.

[0030] When the pipeline is preheated, the distance between the two heating mechanisms 4 is adjusted by adjusting component 33, and the two heating mechanisms 4 are located inside or outside the pipeline. The first driving mechanism 32 drives the first rotating component 31 to rotate, so that the two heating mechanisms 4 rotate around the central axis of the pipeline, thereby achieving dynamic and uniform heating of the pipeline.

[0031] When heating the plate is required, the two heating mechanisms 4 are symmetrically distributed vertically, and the two heating mechanisms 4 are applied to the weld seams on the upper and lower sides of the plate respectively to achieve static heating of the plate, effectively reducing the frequency and continuous operation of workers, improving the uniformity of preheating before welding, and improving the welding quality.

[0032] In one embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the first rotating assembly 31 includes a connecting box 311, a first rotating joint 312, and a driving disk 313.

[0033] The drive disk 313 is mounted on the support tube 2 via the connecting box 311. The drive disk 313 has two symmetrically arranged limiting grooves 3131. The first rotary joint 312 is mounted on the connecting box 311 and is located inside the support tube 2.

[0034] It should be noted that the connecting box 311 is coaxially arranged with the drive disk 313 and is driven by the first drive mechanism 32, rotating synchronously at the end of the support tube 2. The external combustible gas is sent into the connecting box 311 by the first rotary joint 312, and then diverted by the connecting box 311 to the two heating mechanisms 4.

[0035] In one embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the adjustment assembly 33 includes two symmetrically arranged slide plates 331, studs 332, and two symmetrically arranged adjustment nuts 333.

[0036] The stud 332 is rotatably connected to two symmetrically arranged limiting grooves 3131, two symmetrically arranged adjusting nuts 333 are set on the stud 332 and are respectively located in the two symmetrically arranged limiting grooves 3131, and two symmetrically arranged sliding plates 331 are movably connected to the limiting grooves 3131 and are threadedly connected to the stud 332.

[0037] It should be noted that the stud 332 proposed in the above embodiment is a stud 332 with positive and negative threads. It is driven to rotate by two symmetrically arranged adjusting nuts 333, so that the two symmetrically arranged sliding plates 331 slide against the inner wall of the limiting groove 3131. At the same time, the sliding plate 331 is L-shaped, and the heating mechanism 4 is supported by the bent surface at the end of the sliding plate 331 away from the stud 332.

[0038] In one embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the heating mechanism 4 includes a second rotary joint 41, a pressure tube 42, and multiple heating devices 43.

[0039] The pressure pipe 42 is rotatably connected to the slide plate 331 via the second rotary joint 41. The second rotary joint 41 is connected to the connecting box 311 via pipeline. Multiple heating devices 43 are arranged on the pressure pipe 42 and are equally spaced along the axial direction of the pressure pipe 42.

[0040] It should be noted that the heating device 43 proposed in the above embodiment adopts a combination of a combustible gas nozzle and a pulse igniter. The pressure tube 42 is rotatably connected to the slide plate 331 through the second rotary joint 41, which can realize the directional rotation adjustment of the pressure tube 42 and multiple heating devices 43. At the same time, a locking screw is threaded on the slide plate 331, which contacts the end face of the pressure tube 42 to fix the angle of the pressure tube 42.

[0041] In one embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the first drive mechanism 32 includes a first drive device 321 and a drive wheel 322.

[0042] The first driving device 321 is mounted on the support plate 1, and the driving wheel 322 is mounted on the output end of the first driving device 321 and is located below the driving disk 313 and in contact with the outer circumference of the driving disk 313.

[0043] It should be noted that the drive wheel 322 and drive disk 313 proposed in the above embodiment adopt gear meshing transmission. The drive wheel 322 drives the drive disk 313 to rotate slowly, so as to realize the uniform rotation of the two heating mechanisms 4.

[0044] In summary, the preheating device for welding according to this utility model uses a dual-sided dynamic or static flame heating method. The flame position and direction are adjustable, making it suitable for uniform preheating of different part structures, reducing frequent operation by workers, lowering workload, and improving welding quality.

[0045] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A preheating device for welding, characterized in that, It includes a support plate, a support tube, a flipping connection mechanism, and two heating mechanisms, among which, The support tube is disposed on the support plate and extends through the support plate; The two heating mechanisms are rotatably connected to the support tube via the flip-connecting mechanism; The flipping connection mechanism includes a first rotating component, a first driving mechanism, and an adjusting component, wherein, The first rotating component is rotatably connected to the support tube; The adjustment component is movably connected to the first rotating component; The first drive mechanism is disposed on the support plate and located below the first rotating component.

2. The preheating device for welding according to claim 1, characterized in that, The first rotating assembly includes a connecting box, a first rotary joint, and a drive disk, wherein, The drive plate is mounted on the support tube via the connecting box, and the drive plate has two symmetrically arranged limiting grooves. The first rotary joint is disposed on the connecting box and located inside the support tube.

3. The preheating device for welding according to claim 2, characterized in that, The adjustment assembly includes two symmetrically arranged sliding plates, a stud, and two symmetrically arranged adjusting nuts, wherein... The stud is rotatably connected to two symmetrically arranged limiting grooves; Two symmetrically arranged adjusting nuts are disposed on the stud and are respectively located in two symmetrically arranged limiting grooves; Two symmetrically arranged sliding plates are movably connected within the limiting groove and threadedly connected to the stud.

4. The preheating device for welding according to claim 3, characterized in that, The heating mechanism includes a second rotary joint, a pressure tube, and multiple heating devices, wherein, The pressure tube is rotatably connected to the slide plate via the second rotary joint; The second rotary joint is connected to the conduit box via a pipeline. Multiple heating devices are disposed on the pressure tube and are arranged at equal intervals along the axial direction of the pressure tube.

5. The preheating device for welding according to claim 2, characterized in that, The first driving mechanism includes a first driving device and a driving wheel, wherein, The first driving device is mounted on the support plate; The drive wheel is located at the output end of the first drive device and below the drive disk, and is in contact with the outer circumferential side of the drive disk.

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