A circular thick plate surfacing flame heating preheating device

Abstract

The utility model discloses a kind of circular thick plate surfacing flame heating preheating device, including multiple diameter different arc pipes and same number of air supply pipes with the arc pipe, the arc pipe concentricity same plane is laid into pipe group, the air supply pipe is fixed in the pipe group, the air supply pipe and the arc pipe one-to-one correspondence communication and transport gas;The arc pipe is also provided with multiple nozzles.The utility model is to meet the preheating and interlayer temperature insulation of various diameter circular thick plate surfacing process, to improve surfacing efficiency and quality, change from original furnace preheating to flame preheating, and the preheating device that can control the temperature in each diameter range of circular thick plate is made.

Description

Technical Field

[0001] This utility model relates to circular thick plate overlay welding, specifically a circular thick plate overlay welding flame heating preheating device. Background Technology

[0002] Problems with existing weld overlays: Preheating round, thick plates into the furnace is costly and inconvenient to transport. It is inconvenient to transport them after they come out of the oven; Unable to accurately control and maintain temperature. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model provides a flame preheating device for welding circular thick plates. In order to meet the preheating and interlayer temperature preservation requirements of welding circular thick plates of various diameters, thereby improving welding efficiency and quality, this utility model changes the original furnace preheating to flame preheating and creates a preheating device that can control the temperature within each diameter range of the circular thick plate.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solution: a circular thick plate overlay welding flame heating preheating device, comprising multiple arc tubes of different diameters and the same number of gas supply pipes as the arc tubes, the arc tubes being laid concentrically and in the same plane to form a pipe group, the gas supply pipes being fixed to the pipe group, the gas supply pipes being connected to the arc tubes one by one and supplying gas; the arc tubes are also provided with multiple nozzles.

[0005] The inner diameters of the multiple arc tubes increase sequentially from the inside to the outside with the same increment, and the widths of the multiple arc tubes are the same.

[0006] Each of the arc-shaped pipes is provided with a first gas connection port, and each of the gas supply pipes is provided with a second gas connection port. The first gas connection port of the arc-shaped pipe is connected to the second gas connection port of the corresponding gas supply pipe, and the connection point is called the docking point.

[0007] The multiple air supply pipes are evenly distributed around the circumference, so that the docking points are evenly distributed around the circumference, and the multiple air supply pipes have the same inner diameter, the same outer diameter, and the same length.

[0008] The multiple arc-shaped pipes and the multiple air supply pipes are connected at their respective docking points, but not at other intersections, and are only fixedly connected.

[0009] Each of the gas supply pipes has an air inlet at its inner end. Each air inlet of the gas supply pipe supplies gas to the corresponding arc pipe, and each air inlet is independently controlled.

[0010] Each of the multiple arc-shaped tubes has a mounting hole, and the nozzle is installed in the mounting hole.

[0011] It also includes a support structure, which includes an outer support block and an inner support block. Multiple outer support blocks are evenly distributed around the circumference, and the inner support block is located at the center. A pad block is also provided on the upper surface of the outer support block.

[0012] In summary, this utility model achieves the following technical effects: The original furnace preheating or electric heating was replaced with segmented flame preheating. The size and on / off status of each ring of flame were controlled according to the welding progress of the circular thick plate, which saved gas costs and made the product quality more controllable. Attached Figure Description

[0013] Figure 1 It is a circular thick plate overlay welding flame heating and preheating device; Figure 2 yes Figure 1 Enlarged view of the center; Figure 3 This is a schematic diagram of the supporting structure; Figure 4 yes Figure 3 Schematic diagram of cross section in the AA direction. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings.

[0015] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] Example: Figure 1 It is a circular thick plate overlay welding flame heating and preheating device, including multiple arc tubes of different diameters and the same number of gas supply pipes as the arc tubes. The arc tubes are laid concentrically and in the same plane to form a pipe group. The gas supply pipes are fixed to the pipe group. The gas supply pipes are connected to the arc tubes one by one and transport gas. The arc tubes are also equipped with multiple nozzles.

[0021] The inner diameters of the multiple arc tubes increase sequentially from the inside to the outside with the same increment, and the widths of the multiple arc tubes are the same.

[0022] In this embodiment, there are four arc-shaped tubes: Ring 1 (1), Ring 2 (2), Ring 3 (3), and Ring 4 (4). The four arc-shaped tubes have the same dimensions but different inner diameters, forming a shape as shown below. Figure 1 The state shown.

[0023] Each of the arc-shaped pipes is provided with a first gas connection port, and each of the gas supply pipes is provided with a second gas connection port. The first gas connection port of the arc-shaped pipe is connected to the second gas connection port of the corresponding gas supply pipe, and the connection point is called the docking point.

[0024] The multiple air supply pipes are evenly distributed around the circumference, so that the docking points are evenly distributed around the circumference, and the multiple air supply pipes have the same inner diameter, the same outer diameter, and the same length.

[0025] In this embodiment, there are four gas supply pipes, evenly distributed around the circumference. They are pipe 11, pipe 22, pipe 33, and pipe 44. Pipe 11 is connected to ring 1 at the first docking point 101. Similarly, pipe 22 is connected to ring 2 at the second docking point 201. Pipe 33 is connected to ring 3 at the third docking point 301. Pipe 44 is connected to ring 4 at the fourth docking point 401. The connection points are made by welding the first gas interface and the second gas interface together.

[0026] The multiple arc-shaped pipes and the multiple air supply pipes are connected at their respective docking points, but not at other intersections, and are only fixedly connected.

[0027] In this embodiment, apart from being welded together at the four docking points, the other intersections of the four arc pipes and the four air supply pipes are only welded together and not connected, serving as a fixed support.

[0028] like Figure 2 yes Figure 1 The enlarged schematic diagram at the center shows that multiple gas supply pipes have air inlets at their inner ends. Each air supply pipe's air inlet supplies gas to the corresponding arc pipe, and each air inlet is independently controlled.

[0029] In this embodiment, there are four air inlets: inlet 110 at the inner end of pipe 11, inlet 220 at the inner end of pipe 22, inlet 330 at the inner end of pipe 33, and inlet 440 at the inner end of pipe 44. Inlet 110 supplies gas to pipe 11 and supplies gas to ring 1 through the first docking point 101. Similarly, inlet 220 supplies gas to pipe 22 and supplies gas to ring 2 through the second docking point 201. The rest are similar and will not be described in detail.

[0030] Each of the multiple arc tubes has a mounting hole 5, and the nozzle is installed in the mounting hole 5.

[0031] In this embodiment, the number of mounting holes 5 opened in ring 1 is 4, and the number of mounting holes 5 opened in ring 2, ring 3, and ring 4 is 6 each. Furthermore, the mounting holes 5 on each ring are evenly distributed around the circumference, and the mounting holes on the four rings are staggered so that the nozzles on adjacent rings are not on the same diameter.

[0032] Figure 3 This is a schematic diagram of the supporting structure. Figure 4 yes Figure 3 The schematic diagram of the cross section in the AA direction also includes a support structure, which includes an outer support block and an inner support block. Multiple outer support blocks are evenly distributed around the circumference, and the inner support block is located at the center. A pad block is also provided on the upper surface of the outer support block.

[0033] The number of external support blocks can be indefinite, for example, 8. Figure 1 The number 7 shown indicates the outer support block. Figure 1 The number of middle and outer support blocks 7 is 8 ( Figure 1 (The inner support block is not shown), but there can also be 6 of them. Figure 3 The number 801 shown indicates the outer support block. Figure 3 There are 6 outer and middle support blocks 801, along with 2 inner support blocks 802. Figure 1 The eight external support blocks shown are 7. Figure 3 The six external support blocks 801 shown are just two different examples.

[0034] In this embodiment, as Figure 3 As shown, there are 6 outer support blocks 801, evenly distributed around the circumference, and 2 inner support blocks located at the center. The number 8 indicates the outer edge of the circular thick plate.

[0035] by Figure 3 For example, this embodiment uses a total of 8 support blocks (using the hydraulic pressure fixtures and supports borrowed from the thermal power plant base). The six outer ring blocks are evenly distributed, and each of these six blocks requires an 8mm 803 shim. The two middle blocks are symmetrically arranged, without shims. Before heat treatment, the center of the circular thick plate is suspended from the support blocks by 8mm. After the support blocks are arranged, the 50-ton pressure block is placed centrally in the center of the circular thick plate and secured.

[0036] Working principle: This invention uses a seamless steel pipe with a diameter of 40mm to be processed into arc pipes of different diameters by a pipe bending machine, and then drilled and welded with flame nozzles. Each ring of flame is controlled by a single hole switch.

[0037] 1. Prepare the heating equipment in advance.

[0038] 2. Place the heating device in the designated area below the circular thick plate. Do not heat only the surface to be welded. Ensure that the flame is at least 80mm away from the back of the circular thick plate during heating. Set up a warning rope around the area and prepare insulation cotton.

[0039] The 3rd and 4th rings of flame can be individually controlled to turn each ring on and off, making it easy to adjust the temperature of each area.

[0040] 4. Before welding the transition layer, when measuring the surface temperature of the circular thick plate, measure the temperature every 400mm along the radius from the center outwards. The key is to ensure that the preheating temperature of all measuring points meets the heating temperature requirements of the circular thick plate. Measure the temperature and keep a record.

[0041] 5. When welding the transition layer, the temperature within 4m of the welding area should be maintained above 80℃ (and within 1m of the edge should be maintained above 60℃), subject to consultation and agreement with the customer.

[0042] 6. The lower support piers of the circular thick plate should be adjusted and confirmed according to the actual site conditions.

[0043] Place the heating device in the designated area below the circular thick plate. Do not heat only the surface to be welded. Ensure that the flame is at least 80mm away from the back of the circular thick plate during heating. Set up a warning rope around the area and prepare insulation cotton.

[0044] 7. The four rings of flame can be individually controlled to turn each ring on and off, making it easy to adjust the temperature of each area.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A flame heating and preheating device for welding circular thick plates, characterized in that: It includes multiple arc-shaped pipes of different diameters and the same number of gas supply pipes as the arc-shaped pipes. The arc-shaped pipes are laid concentrically and in the same plane to form a pipe group. The gas supply pipes are fixed to the pipe group. The gas supply pipes are connected to the arc-shaped pipes one by one and transport gas. The arc-shaped pipes are also equipped with multiple nozzles.

2. The circular thick plate overlay welding flame heating preheating device according to claim 1, characterized in that: The inner diameters of the multiple arc tubes increase sequentially from the inside to the outside with the same increment, and the widths of the multiple arc tubes are the same.

3. The circular thick plate overlay welding flame heating preheating device according to claim 1, characterized in that: Each of the arc-shaped pipes is provided with a first gas connection port, and each of the gas supply pipes is provided with a second gas connection port. The first gas connection port of the arc-shaped pipe is connected to the second gas connection port of the corresponding gas supply pipe, and the connection point is called the docking point.

4. The circular thick plate overlay welding flame heating preheating device according to claim 3, characterized in that: The multiple air supply pipes are evenly distributed around the circumference, so that the docking points are evenly distributed around the circumference, and the multiple air supply pipes have the same inner diameter, the same outer diameter, and the same length.

5. The circular thick plate overlay welding flame heating preheating device according to claim 3, characterized in that: The multiple arc-shaped pipes and the multiple air supply pipes are connected at their respective docking points, but not at other intersections, and are only fixedly connected.

6. The circular thick plate overlay welding flame heating preheating device according to claim 1, characterized in that: Each of the gas supply pipes has an air inlet at its inner end. Each air inlet of the gas supply pipe supplies gas to the corresponding arc pipe, and each air inlet is independently controlled.

7. The circular thick plate overlay welding flame heating preheating device according to claim 1, characterized in that: Each of the multiple arc-shaped tubes has a mounting hole, and the nozzle is installed in the mounting hole.

8. The circular thick plate overlay welding flame heating preheating device according to claim 1, characterized in that: It also includes a support structure, which includes an outer support block and an inner support block. Multiple outer support blocks are evenly distributed around the circumference, and the inner support block is located at the center. A pad block is also provided on the upper surface of the outer support block.

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