Plate type copper cooling wall

Abstract

The utility model belongs to the technical field of cooling walls, and particularly relates to a plate-type copper cooling wall which comprises a T2 red copper plate, carbon steel claw nails which are uniformly distributed on the surface of the T2 red copper plate and are connected through welding, and a water tank which is arranged on the back surface of the T2 red copper plate, is downwards sunken and has a semicircular cross section, the water tanks are arranged in a spiral shape around the center of the T2 red copper plate outwards, coil pipes matched with the water tanks in shape are arranged in the water tanks, the technical advantages of advanced welding are utilized, and the technical theories of fluid mechanics and structural mechanics are matched, so that the plate type copper cooling wall structure is improved from the two aspects of structural strength improvement and heat dissipation process optimization, and the heat dissipation efficiency of the plate type copper cooling wall structure is improved. And the stability of the structure service process and the maximization of comprehensive benefits are realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling walls, in particular to a plate-type copper cooling wall. Background Art

[0002] The cooling wall is one of the important cooling equipment of the smelting furnace. During the production process of the smelting furnace, a stable slag skin (thermal conductivity 1.2-2.3W / m·℃) is formed on the surface of the cooling wall, forming a self-lining and self-protection system, which effectively reduces the heat loss of the furnace shell and prolongs the life of this area. The traditional cast copper cooling wall is made of pre-buried copper tubes and then cast copper, with dovetail grooves engraved on the surface, and refractory bricks or refractory wool installed in the dovetail grooves for reuse. Under harsh working conditions, refractory bricks or refractory wool are easily eroded by melt and airflow. In addition, the risk of slag formation and overall fall-off after the metal solution or airflow in the furnace scours the surface and exposes the dovetail groove structure, which is insufficient to protect the surface of the cooling wall; Due to the limitations of the casting process, there is uneven bonding between the pre-buried copper water pipe and the cooling wall body, and there will be stratification or porosity on the bonding surface; the cast copper cooling wall itself has low structural strength, and it has to reduce deformation by increasing the thickness of the structure, but it is still prone to deflection deformation at high temperatures. How to optimize the connection strength of refractory bricks or refractory wool on the surface of the cooling wall, ensure the stability of the combination of copper water pipes and the cooling wall body, improve the overall structural strength, and extend its life and cold repair cycle has always been a difficult problem that needs to be solved urgently. Utility Model Content

[0003] The purpose of the utility model is to provide a plate type copper cooling wall, which combines the service characteristics of the plate type copper cooling wall structure, utilizes the technical advantages of advanced welding, and cooperates with the technical theories of fluid mechanics and structural mechanics to improve the structure of the plate type copper cooling wall from two aspects: improving the structural strength and optimizing the heat dissipation process, so as to achieve the stabilization of the structural service process and maximize the comprehensive benefits.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A plate-type copper cooling wall comprises a T2 copper plate, carbon steel claw nails evenly distributed on the surface of the T2 copper plate and connected by inverter arc stud welding, and a water trough with a semicircular groove section that is recessed downward and arranged on the back of the T2 copper plate. The water trough is arranged in a spiral shape along the center of the T2 copper plate to avoid the position of the carbon steel claw nails and surround outward. A coil matching the shape of the water trough is arranged in the water trough. A protrusion is provided at the end of the carbon steel claw nail, and two foot nails inclined outward are provided at the other end. The protrusion is inserted into the interior of the T2 copper plate.

[0006] Furthermore, the top of the coil is welded to the back of the T2 copper plate by a plurality of evenly distributed semi-circular fins, and the semi-circular fins are evenly arranged along the direction of the coil, and the distance between the fins is 50 mm.

[0007] Furthermore, the semicircular fins are a three-layer composite structure of copper, steel and copper, and the thickness of the semicircular fins is 1.5 mm, and the distance between each fin is 50 mm.

[0008] Furthermore, the size of the carbon steel claw nail is φ10mm*30mm, the size of the protrusion is φ0.5mm*1mm, and the distance between two adjacent carbon steel claw nails is 100mm.

[0009] Furthermore, the water troughs are arranged in a spiral shape with the center of the T2 copper plate as the origin and the edge distances of the spiral water troughs are equal to each other and are both 100 mm.

[0010] Furthermore, the wall thickness of the coil is 1.5 mm and the outer diameter is 100 mm; the solder paste thickness is 0.5 mm on the surface before the claw nail welding, and the thickness of the T2 copper plate is 60 mm.

[0011] The utility model has the advantages that:

[0012] 1. The utility model adopts inverter arc stud welding to weld carbon steel claws with solder paste on the surface of the plate-type copper cooling wall in pairs at intervals of 100 mm. The claws are used instead of the dovetail grooves engraved inwards. On the one hand, the thickness of the copper plate layer of the overall structure is reduced, which reduces the cost and workload; on the other hand, it solves the problem of low structural firmness of the existing refractory cotton / refractory bricks embedded in the dovetail groove, reduces the risk of slagging and overall falling off after the metal solution or airflow in the furnace washes the surface, thereby increasing the service life of the overall structure.

[0013] 2. The utility model uses the prefabricated water tank to be distributed in a spiral shape, one in and one out, and the cross-section of the prefabricated water tank is semicircular, which can minimize fluid resistance and increase heat dissipation efficiency;

[0014] 3. Use pure copper coils with a wall thickness of 1.5mm and an outer diameter of 10mm, and embed them in the semi-circular water tank. The tube wall embedded in the semi-circular water tank is closely connected with the water tank wall. The additive in the semi-circular water channel is heated to melt by induction heating and then quickly cooled, so that the tube wall embedded in the semi-circular water tank is welded and connected with the semi-circular water tank to form an integral structure. On the one hand, compared with the traditional pure copper cooling wall, the copper coil is closely fitted with the overall structure, which improves the heat dissipation effect and enhances the heat transfer efficiency; on the other hand, it subverts the design form of copper tubes inserted and cast inside the structure, reduces the copper layer thickness of the overall structure, and reduces the cost;

[0015] 4. The part of the pipe wall that is not embedded in the water tank in the utility model adopts 1.5mm thick three-layer composite fins of copper, steel and copper, which are buckled on the copper coil leaking out of the prefabricated waterway, with a spacing of 50mm between each fin and welded to three points on both sides of the copper cooling wall and the surface of the pipe wall. On the one hand, considering that the thickness of the copper layer of the overall structure is thinner than that of the traditional pure copper cooling wall structure, the role of the steel material in the composite structure fin is utilized to improve the overall strength of the structure and strengthen the pipeline; on the other hand, the copper material on the outside of the copper-steel-copper composite fin increases the heat dissipation area of ​​the copper coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the plate-type copper cooling wall of the utility model.

[0017] Figure 2 This is a welding structure diagram of the claw nail in the utility model.

[0018] Figure 3 This is a diagram of a prefabricated water tank in the utility model.

[0019] Figure 4 It is a side view of the coil in the water tank of the utility model.

[0020] Figure 5 It is a side view of the fin welding structure in the utility model. DETAILED DESCRIPTION Example

[0021] like Figure 1-5 As shown, a plate-type copper cooling wall comprises a T2 copper plate 1, carbon steel claw nails 2 evenly distributed on the surface of the T2 copper plate and connected by welding, the carbon steel claw nails have a size of φ10mm*30mm, and a φ0.5mm*1mm high protrusion 3 is reserved at the end of the claw nail, and the protrusion is inserted into the T2 copper plate; it also comprises a water tank 4 with a semicircular groove section that is recessed downward and arranged on the back of the T2 copper plate, the water tank is arranged in a spiral shape around the center of the T2 copper plate, and a coil 6 matching its shape is arranged in the water tank; the top of the coil is welded to the back of the T2 copper plate by a plurality of evenly distributed semicircular fins 7, and the semicircular fins are evenly arranged along the direction of the coil; the semicircular fins are a three-layer composite structure of copper, steel and copper, and the thickness of the semicircular fins is 1.5mm, and the spacing between the two is 50mm;.

[0022] A method for preparing a plate-type copper cooling wall comprises the following steps: placing a 60*1300*1300mm T2 copper plate 1 on the upper part of a platform, dividing the T2 copper plate with a cross-line, and setting the intersection as a positioning point, with a spacing of 100mm between the positioning points; selecting a φ10mm*30mm carbon steel claw nail 2, and reserving a φ0.5mm*1mm protrusion 3 at the end of the claw nail through milling and turning, selecting appropriate welding parameters, and welding the claw nail to the positioning point set on the surface of the copper plate; turning over the welded structure, and prefabricating a spiral water trough structure 4, wherein the margins of the spiral water troughs are equal to each other, with a margin of 100mm; laying a 0.3mm The thickness of 88% phosphor copper solder powder and 12% rosin mixture 5, the T2 copper coil 6 with a wall thickness of 1.5mm and an outer diameter of 100mm, is embedded in the prefabricated water tank, and the phosphor copper powder and rosin mixture in the water tank is heated to melt by induction heating to achieve a close fit between the copper coil and the prefabricated water tank wall; the copper-steel-copper three-layer composite structure semi-circular arc fin 7 with a thickness of 1.5mm is buckled on the surface of the T2 copper coil exposed outside the prefabricated waterway, and the two ends of the copper-steel-copper three-layer composite fin after laser cutting are fixed to the copper plate surface by welding, and the middle is fixed to the surface of the T2 copper coil, and the distance between the fins is 50mm. Combined with numerical simulation tools, the stress of the fluid in the structure and the overall anti-deformation ability of the structure are analyzed, and the heat dissipation effect of the structure is improved by the spiral water tank design. The copper-steel-copper three-layer composite fin structure after laser cutting increases the heat transfer area while enhancing the anti-deformation ability of the structure.

[0023] Performance measurement

[0024] 1.1 Process

[0025] (1) Through the industrial analysis part of Ansys finite element simulation software, digital simulation of fluid pressure was selected for testing, and a reasonable water tank structure design was selected based on the color changes in the simulation screen.

[0026] (2) By using inverter arc stud welding in conjunction with solder paste, efficient welding of carbon steel claws and T2 copper plates can be achieved.

[0027] (3) The water tank is prefabricated on the other side of the T2 copper plate using CNC. The water tank is spiral-shaped in order to reduce fluid resistance, evenly dissipate heat, and not easily cause deformation stress, and improve heat dissipation efficiency.

[0028] (4) Apply a 0.3 mm thick mixture of 88% phosphor copper solder powder and 12% rosin to the outer surface of the prefabricated water tank.

[0029] (5) Select T2 copper coil and embed it in the prefabricated water tank.

[0030] (6) The structure is fixed by the tooling and moved to the work station for induction heating of the water channel area to make the T2 copper coil fit the inner wall of the water tank.

[0031] (7) After structural mechanics simulation, a copper-steel-copper three-layer composite fin structure with a thickness of 1.5 mm was selected after laser cutting, and was buckled on the outside of the T2 copper coil at a distance of 50 mm between each fin.

[0032] (8) The tightly assembled fins are welded to the copper cooling wall body and the T2 copper coil to finally form an overall product structure.

[0033] All surfaces: Before each layer is processed, it is cleaned with organic solvent to ensure that there are no stains. Before all welding is carried out, the surface roughness of the material is less than 1.6nm;

[0034] Flatness: Before processing each layer, the overall flatness is less than 0.8mm / m;

[0035] Thickness of homemade flux: 0.3mm;

[0036] (9) Use the flame correction method to bend the beginning and end of the T2 copper coil at 90 degrees to form an integrated structure for the inlet and outlet water pipes.

[0037] 1.2 Basic Process of Performance Testing

[0038] (1) Prepare to meet the technical requirements and use qualified T2 copper plates, carbon steel nails, T2 copper coils, and copper-steel-copper three-layer composite plates.

[0039] (2) The copper side of the surface to be welded is polished and treated with organic solvents to ensure that there are no stains. The cross method is used to take the intersection of evenly distributed straight lines as the positioning points.

[0040] (3) Inverter arc stud welding is used in conjunction with solder paste, with a current of 1500A, a voltage of 380V, a welding time of 6s, and a gas protection time of 12s to weld the carbon steel claw nails one by one at the positioning point positions.

[0041] (4) The finite element method is used to simulate and calculate the resistance state of different fluids, select the most suitable spiral water tank structure, and simulate the structural mechanics characteristics to select a specific fin structure and distribution rules.

[0042] (5) Conduct a bonding strength test simulation on the claw nails after welding.

[0043] (6) The spiral water tank structure was prefabricated by CNC method, and homemade flux was applied to the inner wall of the water channel.

[0044] (7) After the T2 copper coil is embedded in the water tank, the water tank position is welded using local induction heating.

[0045] (8) After structural mechanics simulation, a copper-steel-copper three-layer composite fin structure with a thickness of 1.5 mm was selected after laser cutting, and was buckled on the outside of the T2 copper coil at a distance of 50 mm between each fin.

[0046] (9) Use flame heating method to correct the beginning and end of the T2 copper tube to 90°.

[0047] (10) The product was subjected to a water pressure test at a pressure of 1.05 times the working pressure and greater than 0.3 MPa. The joints between each T2 copper coil and the water tank, the fin fixing position and the water pipe system were observed for 15 minutes under the test pressure. The pressure drop was no greater than 0.05 MPa. The pressure was then reduced to the working pressure and checked again. No seepage or leakage was observed.

Claims

1. A plate-type copper cooling wall, characterized in that: It includes a T2 copper plate, carbon steel claw nails evenly distributed on the surface of the T2 copper plate and connected by inverter arc stud welding, and a water tank with a semicircular groove section that is recessed downward and arranged on the back of the T2 copper plate. The water tank is arranged in a spiral shape along the center of the T2 copper plate to avoid the position of the carbon steel claw nails and surround outward. A coil matching its shape is arranged in the water tank. A protrusion is provided at the end of the carbon steel claw nail, and two foot nails inclined outward are provided at the other end. The protrusion is inserted into the inside of the T2 copper plate.

2. The plate-type copper cooling stave according to claim 1, characterized in that: The top of the coil is welded to the back of the T2 copper plate by a plurality of evenly distributed semi-circular arc fins, and the semi-circular arc fins are evenly arranged along the direction of the coil, and the distance between the fins is 50 mm.

3. The plate-type copper cooling stave according to claim 2, characterized in that: The semicircular arc fins are a three-layer composite structure of copper, steel and copper, and the thickness of the semicircular arc fins is 1.5 mm, and the distance between each fin is 50 mm.

4. The plate-type copper cooling stave according to claim 3, characterized in that: The size of the carbon steel claw nail is φ10mm*30mm, the size of the protrusion is φ0.5mm*1mm, and the distance between two adjacent carbon steel claw nails is 100mm.

5. The plate-type copper cooling stave according to claim 4, characterized in that: The water troughs are arranged in a spiral shape with the center of the T2 copper plate as the origin, and the edge distances of the spiral water troughs are equal to each other and are both 100 mm.

6. The plate-type copper cooling stave according to claim 5, characterized in that: The wall thickness of the coil is 1.5 mm and the outer diameter is 100 mm; the solder paste thickness is 0.5 mm on the surface before the claw nail welding, and the thickness of the T2 copper plate is 60 mm.

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