A new composite plate welding structure

Abstract

The utility model discloses a novel composite board welding structure relates to the technical field of composite board welding, including base layer, intermediate layer and complex layer, base layer, intermediate layer and complex layer are fixed together, two adjacent intermediate layer and complex layer between be provided with the shim, the lower surface of shim is provided with the pad strip, and the outer surface of pad strip is connected with complex layer, the inner wall of pad strip is provided with the gap, and the both sides of pad strip located gap all are provided with leak detection hole. The utility model discloses design structure is reasonable, it through the intermediate layer and complex layer of two sides of butt joint place each plan away certain area scope, fills the shim of a piece zirconium material to the area of plan away before, so as to shut up between base layer and intermediate layer, prevent both intercommunication, thereby solved the existing when welding base layer, the melted base layer metal can mix into complex layer weld metal, lead to the alloy element content reduction of complex layer weld, reduced the corrosion resistance or high temperature performance problem.

Description

Technical Field

[0001] This utility model relates to the technical field of composite plate welding, specifically a novel composite plate welding structure. Background Technology

[0002] Composite panels are made of two or more materials with different properties, combined through physical or chemical methods. They have comprehensive performance advantages and are usually composed of a cladding layer and a base layer. The base layer is the main layer that provides structural strength and rigidity. It is usually made of carbon steel or low alloy steel with good mechanical properties and low cost. The cladding layer is the surface layer that is in direct contact with corrosive media, high temperature environments, etc. It is usually made of materials with corrosion resistance, high temperature resistance, and special properties. Only expensive special materials are used on the surfaces that are in direct contact with corrosive media, high temperature, or wear. The base layer, which accounts for most of the thickness of the panel, is made of inexpensive carbon steel or low alloy steel. Through this combination method, the production cost is greatly reduced.

[0003] In existing composite plates, welding is generally done on both sides separately. When welding the base layer, the molten base metal mixes into the cladding weld metal, which reduces the alloy element content of the cladding weld and decreases its corrosion resistance or high-temperature performance. To address these issues, we have provided a new composite plate welding structure. Utility Model Content

[0004] 1) Technical problems to be solved

[0005] This utility model proposes a novel composite plate welding structure. By setting up components such as backing plates, it solves the problem that in existing composite plates, welding is generally done on both sides separately. When welding the base layer, the molten base metal mixes into the cladding weld metal, resulting in a decrease in the alloy element content of the cladding weld and a reduction in corrosion resistance or high-temperature performance.

[0006] (ii) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a novel composite plate welding structure, comprising a base layer, an intermediate layer, and a cladding layer, wherein the base layer, intermediate layer, and cladding layer are stacked and fixed together; a pad is provided between two adjacent intermediate layers and cladding layers, and a pad strip is provided on the lower surface of the pad, the outer surface of the pad strip being connected to the cladding layer; a gap is provided in the inner wall of the pad strip, and a leak detection hole is provided on both sides of the gap; a strip is fixedly connected to the lower part of the gap, and a cover plate is fixedly connected to the lower surface of the strip.

[0008] Furthermore, the base layer is made of carbon steel, the intermediate layer is made of titanium, and the cladding layer is made of zirconium metal.

[0009] Furthermore, the pad is made of zirconium metal, and a first solder joint is provided between the side of the pad and the cladding layer to fix the pad.

[0010] Furthermore, the pad is made of zirconium metal, and a second solder joint is provided on the side of the pad to fix the pad. The second solder joint is welded by silver brazing.

[0011] Furthermore, a third weld point is provided between two adjacent base layers, and the third weld point is welded using high-strength steel welding wire.

[0012] Furthermore, the material of the adhesive strip is zirconium, and the inner side of the adhesive strip is welded to the pad strip and the periphery of the cladding layer. The material of the cover plate is zirconium, and the inner side of the cover plate is welded to the pad strip and the periphery of the cladding layer.

[0013] Furthermore, a leak detection nozzle is detachably installed inside the leak detection hole.

[0014] (iii) Beneficial effects:

[0015] Compared with existing technologies, this novel composite plate welding structure has the following advantages:

[0016] I. This novel composite plate welding structure, by setting up backing plates and other components, involves planing off a certain area of ​​the intermediate layer and the cladding layer on both sides of the joint before the base layer is joined. A zirconium material backing plate is then placed in the previously planed-off area to block the connection between the base layer and the intermediate layer, preventing them from communicating. This avoids the molten base metal from mixing into the cladding layer weld metal, thus increasing corrosion resistance. This solves the problem that in existing composite plates, welding is generally done on both sides separately, and when welding the base layer, the molten base metal mixes into the cladding layer weld metal, leading to a decrease in the alloy element content of the cladding layer weld and a reduction in corrosion resistance or high-temperature performance.

[0017] Second, this new composite plate welding structure, by setting intermediate and cladding layers and other components, changes the original connection structure using pure zirconium or a combination of zirconium and carbon steel to a composite of three materials: carbon steel, titanium, and zirconium. This saves on material and manufacturing costs, avoids the problem that zirconium can only be welded to zirconium, and is simple and efficient to operate, greatly saving costs and ensuring the quality of the equipment. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a cross-sectional view of the base layer of this utility model;

[0020] Figure 2 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 3 This is a cross-sectional view of the leak detection hole in this utility model;

[0022] Figure 4 This is a top view of the pad strip in this utility model;

[0023] Figure 5 This is a bottom view of the pad strip in this utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the cover plate in this utility model.

[0025] In the diagram: 1. Base layer; 2. Intermediate layer; 3. Overlapping layer; 4. Backing plate; 5. Gasket strip; 6. Gap; 7. Leak detection hole; 8. Adhesive strip; 9. Cover plate; 10. First weld point; 11. Second weld point; 12. Third weld point; 13. Leak detection nozzle. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-6 As shown, this utility model provides a technical solution: a novel composite plate welding structure, including a base layer 1, an intermediate layer 2, and a cladding layer 3, which are stacked and fixed together; zirconium has extreme corrosion resistance, but is expensive; titanium also has corrosion resistance, but its high-temperature performance is limited; carbon steel is low in cost and has high mechanical strength, but is prone to corrosion. By combining these three materials, with titanium and zirconium serving as the intermediate layer 2 and cladding layer 3 for corrosion resistance, and carbon steel serving as the base layer 1 for strength bearing, performance and cost optimization are achieved. Pure titanium or pure zirconium equipment is too expensive, and the composite structure can significantly reduce the amount of material used while meeting the corrosion resistance requirements of key parts.

[0028] A gasket 4 is provided between two adjacent intermediate layers 2 and cladding layers 3 to block the gap between the base layer 1 and the intermediate layer 2, preventing them from communicating. During welding, the gasket 4 is first welded to the cladding layer 3, and then the base layers 1 are welded together. A gasket strip 5 is provided on the lower surface of the gasket 4, and the outer surface of the gasket strip 5 is connected to the cladding layer 3. A gap 6 is opened in the inner wall of the gasket strip 5, and a leak detection hole 7 is provided on both sides of the gap 6. The upper part of the leak detection hole 7 extends to the outside of the base layer 1, and its lower part is located above the gasket strip 5. Air pressure can be increased to the gasket strip 5 and the cladding layer 3 to test the sealing of the weld, thereby obtaining the welding effect. A strip 8 is fixedly connected to the lower part of the gap 6, and a cover plate 9 is fixedly connected to the lower surface of the strip 8.

[0029] The base layer 1 is made of carbon steel, the intermediate layer 2 is made of titanium, the cladding layer 3 is made of zirconium metal, the pad 4 is made of zirconium metal, a first weld point 10 is provided between the side of the pad 4 and the cladding layer 3 to fix the pad 4, the pad strip 5 is made of zirconium metal, a second weld point 11 is provided on the side of the pad strip 5 to fix the pad strip 5, the second weld point 11 is welded by silver brazing, a third weld point 12 is provided between two adjacent base layers 1, the third weld point 12 is welded by high-strength steel welding wire, the strip 8 is made of zirconium metal, and the inner side of the strip 8 is welded to the periphery of the pad strip 5 and the cladding layer 3, the cover plate 9 is made of zirconium metal, and the inner side of the cover plate 9 is welded to the periphery of the pad strip 5 and the cladding layer 3, and a leak detection nozzle 13 is detachably installed inside the leak detection hole 7.

[0030] Working principle: Before joining the base layer 1, a certain area of ​​the intermediate layer 2 and the cladding layer 3 on both sides of the joining point is removed. A zirconium material backing plate 4 is then placed in the area that was previously removed to block the connection between the base layer 1 and the intermediate layer 2, preventing them from communicating and avoiding the molten metal of the base layer 1 from mixing into the weld metal of the cladding layer 3, thus increasing corrosion resistance. The backing plate 4 is fixed by welding it to the cladding layer 3. Then, a zirconium material strip 5 is used to cover the weld and weld it to the cladding layer 3.

[0031] The spacer strip 5 comes in two shapes. The first is rectangular, used for horizontal welding. When welding at the T-joint position, the spacer strip 5 is T-shaped to match the shape of the weld. After the above welds are completed, when welding at the T-joint, first, place the spacer strip 5 according to the instructions. Figure 4The composite plate is welded to the cladding layer 3 as shown. A certain gap 6 is left on the longitudinal and circumferential welds for silver brazing. A leak detection nozzle 13 is left on each side. After welding, the leak detection nozzle 13 is used to check the sealing of the weld to prevent the entire weld from being reworked if a leak occurs, thus reducing the amount of rework and accurately detecting the leak point. Next, the gap 6 in the above steps is covered with zirconium strip 8, and zirconium welding is performed around the perimeter to increase the firmness. Finally, a larger zirconium cover plate 9 is used to perform zirconium welding as shown in Appendix 6 of the instruction manual. Finally, the leak detection nozzle 13 is installed at the leak detection hole 7 to complete the welding.

[0032] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0033] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A novel composite plate welding structure, comprising a base layer (1), an intermediate layer (2), and a cladding layer (3), characterized in that: The base layer (1), intermediate layer (2) and superimposed layer (3) are fixed together; A pad (4) is provided between two adjacent intermediate layers (2) and cladding layers (3), and a pad strip (5) is provided on the lower surface of the pad (4), with the outer surface of the pad strip (5) connected to the cladding layer (3). The inner wall of the pad (5) is provided with a gap (6), and the pad (5) is provided with a leak detection hole (7) on both sides of the gap (6). A strip (8) is fixedly connected to the lower part of the gap (6), and a cover plate (9) is fixedly connected to the lower surface of the strip (8).

2. The novel composite plate welding structure according to claim 1, characterized in that: The base layer (1) is made of carbon steel, the intermediate layer (2) is made of titanium, and the cladding layer (3) is made of zirconium metal.

3. The novel composite plate welding structure according to claim 1, characterized in that: The pad (4) is made of zirconium metal. A first weld point (10) is provided between the side of the pad (4) and the cladding layer (3) to fix the pad (4).

4. The novel composite plate welding structure according to claim 1, characterized in that: The pad (5) is made of zirconium metal. A second solder joint (11) is provided on the side of the pad (5) to fix the pad (5). The second solder joint (11) is soldered by silver brazing.

5. The novel composite plate welding structure according to claim 1, characterized in that: A third weld point (12) is provided between two adjacent base layers (1), and the third weld point (12) is welded with high-strength steel welding wire.

6. The novel composite plate welding structure according to claim 1, characterized in that: The material of the strip (8) is zirconium, and the inner side of the strip (8) is welded to the periphery of the pad (5) and the cladding (3). The material of the cover plate (9) is zirconium, and the inner side of the cover plate (9) is welded to the periphery of the pad (5) and the cladding (3).

7. The novel composite plate welding structure according to claim 1, characterized in that: The leak detection hole (7) is detachably fitted with a leak detection nozzle (13).

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