Continuous casting graphite three-way pipe for optimizing temperature field distribution

Abstract

The utility model relates to the technical field of non-ferrous metal copper and copper alloy casting, and discloses a graphite three-way pipe for continuous casting for optimizing temperature field distribution, which comprises a liquid inlet main pipe and a pair of casting branch pipes integrally formed with the liquid inlet main pipe, the bottom end of the liquid inlet main pipe is a closed end, and the top end of the liquid inlet main pipe is provided with a liquid inlet communicated with an inner cavity of the liquid inlet main pipe. The outer diameter of the liquid inlet main pipe is larger than that of the casting branch pipe; the casting branch pipes are symmetrically arranged on the outer walls of the two sides of the lower portion of the liquid inlet main pipe, the axes of the casting branch pipes are perpendicular to the axis of the liquid inlet main pipe, one ends of the casting branch pipes communicate with an inner cavity of the liquid inlet main pipe, and the other ends of the casting branch pipes are provided with casting openings with the section contours in a concave arc shape. The horizontal distance between the upper end of the pouring gate and the liquid inlet main pipe is larger than that between the lower end of the pouring gate and the liquid inlet main pipe. Through the special structural design, the impact force of melt on the small surface of the crystallizer can be relieved, the melt is promoted to be fully mixed, the temperature field distribution is more uniform, and the crystallizer is particularly suitable for casting diversified complex alloys.

Description

TECHNICAL FIELD

[0001] The utility model relates to non ferrous metal copper and copper alloy casting technical field especially relates to a continuous casting graphite tee bend pipe of optimizing temperature field distribution. BACKGROUND

[0002] Graphite tee bend pipe is the key component in semi continuous casting process, when producing the flat ingot of approximate rectangular section with graphite tee bend pipe, the copper liquid is accurately introduced into graphite tee bend pipe through pouring pipe, graphite tee bend pipe evenly and continuously distributes the copper liquid to the crystallizer of rectangular section, the copper liquid gradually solidifies after cooling, and finally forms the cast ingot of accurate size and compact structure under the traction of the casting machine.

[0003] The existing graphite tee bend pipe only has basic shunt function, when casting diversified complex alloy (such as copper nickel silicon system, copper chromium zirconium titanium magnesium system etc.), since these alloys contain easily oxidized elements, melt viscosity is high and flowability is poor, the temperature field distribution of melt is difficult to be uniform in the pouring process, and a series of problems such as alloy phase grain coarsening and increased stress in cast ingot are caused.

[0004] In addition, the two ends of the existing tee bend pipe are designed to be flat, and this structure will directly produce strong impact on the two small faces of the crystallizer during pouring, and long-time impact can easily cause the small face of the crystallizer to be ablated, which not only affects the quality of the cast ingot, but also has serious safety hazards. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a graphite tee bend pipe of optimizing temperature field distribution, solving the technical problems that the existing graphite tee bend pipe only has basic shunt function, the temperature field distribution of melt is difficult to be uniform during pouring, and strong impact on the two small faces of the crystallizer is directly caused, through special structure design, the impact force of melt on the small face of the crystallizer can be reduced, the melt can be fully mixed, the temperature field distribution is more uniform, and the graphite tee bend pipe is especially suitable for casting diversified complex alloy.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A graphite tee bend pipe of optimizing temperature field distribution for continuous casting, including liquid inlet main pipe and a pair of pouring branch pipes integrally formed with liquid inlet main pipe, the bottom end of liquid inlet main pipe is closed end, the top end is provided with liquid inlet communicating with its inner chamber, and the outer diameter of liquid inlet main pipe is greater than that of pouring branch pipe;A pair of pouring branch pipes are symmetrically arranged on the outer walls on both sides of the lower part of liquid inlet main pipe, the axis of pouring branch pipe is perpendicular to the axis of liquid inlet main pipe, one end of pouring branch pipe communicates with the inner chamber of liquid inlet main pipe, and the other end is provided with pouring port with concave circular arc cross section profile;The horizontal distance A between the upper end of pouring port and liquid inlet main pipe is greater than the horizontal distance B between the lower end and liquid inlet main pipe.

[0008] Furthermore, the liquid inlet is an internal threaded connection port.

[0009] Furthermore, the outer diameter of the liquid inlet main pipe is φ60 mm, the horizontal distance A between the upper end of each casting port and the liquid inlet main pipe is 20-75 mm, and the horizontal distance B between the lower end of each casting port and the liquid inlet main pipe is 10-50 mm.

[0010] Preferably, the outer diameter of the liquid inlet main pipe is φ60 mm, the horizontal distance A between the upper end of each casting port and the liquid inlet main pipe is 20 mm, and the horizontal distance B between the lower end of each casting port and the liquid inlet main pipe is 10 mm.

[0011] Preferably, the outer diameter of the liquid inlet main pipe is φ60 mm, the horizontal distance A between the upper end of each casting port and the liquid inlet main pipe is 75 mm, and the horizontal distance B between the lower end of each casting port and the liquid inlet main pipe is 50 mm.

[0012] The beneficial effects of the utility model are:

[0013] The utility model discloses a graphite tee pipe for continuous casting with optimized temperature field distribution. The casting port is designed with an inner concave arc shape, which can effectively reduce the impact force of the melt on the small surface of the crystallizer, avoid crystallizer ablation, extend the service life of the crystallizer, and improve casting safety. The horizontal distance between the upper edge of the casting port and the liquid inlet main pipe is greater than the horizontal distance between the lower edge and the liquid inlet main pipe, so that the melt forms a reasonable vortex during the flow process, promotes full mixing of the melt, and is conducive to the uniform distribution of the temperature field. The structural design that the outer diameter of the liquid inlet main pipe is greater than the outer diameter of the casting branch pipe can reduce the flow rate of the melt in the diversion process, reduce turbulence, make the melt flow more stable, and help improve the quality of the ingot. The overall structural design is reasonable, suitable for the casting of diversified and complex alloys, and can effectively improve the problems of coarse alloy phase grains, increased internal stress of the ingot, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the top view of the structure of the utility model;

[0016] Figure 3 It is a side structural schematic diagram of the utility model;

[0017] Figure 4 yes Figure 2 Schematic diagram of the cross-sectional structure along the AA direction;

[0018] In the figure: liquid inlet main pipe 1, liquid inlet port 1-1, casting branch pipe 2, casting port 2-1. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1-4 As shown, the graphite tee pipe of the present invention is mainly composed of a liquid inlet main pipe 1 and a pair of casting branches 2. The liquid inlet main pipe 1 is made of high-quality graphite material, has an outer diameter of φ60mm, a closed bottom end, and a liquid inlet port 1-1 with an internal thread connection at the top, which can be firmly connected to the casting system.

[0021] A pair of casting branches 2 are symmetrically arranged on both sides of the lower part of the liquid inlet main pipe 1 and are integrally formed with the liquid inlet main pipe 1. The axes of the casting branch pipes 2 and the liquid inlet main pipe 1 are perpendicular to each other. One end of the casting branch pipe 2 is connected to the inner cavity of the liquid inlet main pipe 1, and the other end is designed as a concave arc-shaped casting port 2-1. The horizontal distance A between the upper end of the casting port and the liquid inlet main pipe is greater than the horizontal distance B between the lower end and the liquid inlet main pipe. The special design of the casting port 2-1 enables the melt to form a reasonable vortex structure when flowing out, which can not only reduce the impact on the crystallizer, but also promote sufficient mixing of the melt.

[0022] According to the requirements of different specifications of ingots, different sizes of pouring gates 2-1 can be selected. In the first preferred embodiment, for casting and producing ingots with a specification of 210mmx620mm, the horizontal distance A between the upper end of the pouring gate 2-1 and the liquid inlet main pipe 1 is 20mm, and the horizontal distance B between the lower end and the liquid inlet main pipe 1 is 10mm.

[0023] In the second preferred embodiment, the casting produces an ingot with a specification of 170mmx930mm, and the horizontal distance A between the upper end of the casting port 2-1 and the liquid inlet main pipe 1 is 75mm, and the horizontal distance B between the lower end and the liquid inlet main pipe 1 is 50mm. This differentiated distance design can be selected according to the flow characteristics of different alloys to obtain the best casting effect.

[0024] In actual application, after the melt enters the liquid inlet main pipe 1 through the liquid inlet 1-1, it flows downward under the action of gravity and is then evenly distributed into the crystallizer through the casting branches 2 on both sides. The concave arc-shaped casting port 2-1 design enables the melt to form a stable flow state when flowing out, effectively improving the problem of uneven temperature field distribution. It is particularly suitable for the casting of diversified and complex alloys such as copper-nickel-silicon, copper-chromium-zirconium-titanium-magnesium, etc.

Claims

1. A graphite tee for continuous casting with optimized temperature field distribution, characterized by: The invention comprises a liquid inlet main pipe (1) and a pair of casting branches (2) integrally formed with the liquid inlet main pipe (1), wherein the bottom end of the liquid inlet main pipe (1) is a closed end, and the top end is provided with a liquid inlet port (1-1) communicating with the inner cavity thereof, and the outer diameter of the liquid inlet main pipe (1) is larger than the outer diameter of the casting branch pipe (2); the pair of casting branch pipes (2) are symmetrically arranged on the outer walls of both sides of the lower part of the liquid inlet main pipe (1), the axis of the casting branch pipe (2) is perpendicular to the axis of the liquid inlet main pipe (1), one end thereof is communicated with the inner cavity of the liquid inlet main pipe (1), and the other end is provided with a casting port (2-1) having a concave arc-shaped cross-sectional profile; the horizontal distance A between the upper end of the casting port (2-1) and the liquid inlet main pipe (1) is larger than the horizontal distance B between the lower end and the liquid inlet main pipe (1).

2. The graphite tee for continuous casting with optimized temperature field distribution according to claim 1, characterized in that: The liquid inlet (1-1) is an internal thread connection port.

3. A graphite tee for continuous casting with optimized temperature field distribution according to claim 1 or 2, characterized in that: The outer diameter of the liquid inlet main pipe (1) is φ60 mm, the horizontal distance A between the upper end of each casting port (2-1) and the liquid inlet main pipe (1) is 20-75 mm, and the horizontal distance B between the lower end of each casting port (2-1) and the liquid inlet main pipe (1) is 10-50 mm.

4. A graphite tee for continuous casting with optimized temperature field distribution according to claim 1 or 2, characterized in that: The outer diameter of the liquid inlet main pipe (1) is φ60 mm, the horizontal distance A between the upper end of each casting port (2-1) and the liquid inlet main pipe (1) is 20 mm, and the horizontal distance B between the lower end of each casting port (2-1) and the liquid inlet main pipe (1) is 10 mm.

5. The graphite tee for continuous casting with optimized temperature field distribution according to claim 1 or 2, characterized in that: The outer diameter of the liquid inlet main pipe (1) is φ60 mm, the horizontal distance A between the upper end of each casting port (2-1) and the liquid inlet main pipe (1) is 75 mm, and the horizontal distance B between the lower end of each casting port (2-1) and the liquid inlet main pipe (1) is 50 mm.

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