Furnace frame vertical line casting device and method
By using overlapping sheets in the furnace rack vertical line casting device to connect the ribs of the furnace rack body, and combining high-temperature casting and specific casting structures, the cold partition and insufficient pouring problems caused by the reduction of the molten iron temperature are solved, and the efficiency and quality of furnace rack casting are improved.
Patent Information
- Application Number
- CN202411969388.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-03-21
AI Technical Summary
During the vertical casting process of furnace rack, the temperature of the molten iron drops rapidly, resulting in insufficient cold partitions and watering, and easy to produce slag eye defects.
The two ribs of the furnace rack body in the length direction are connected through the lap sheet to ensure that the two strands of molten iron intersect and fuse as soon as possible during pouring. High-temperature casting is adopted and the flow and temperature of molten iron is controlled through structures such as gate cup, main lap, middle-level throttle block and lower-level throttle block.
It effectively prevents temperature reduction, avoids cold partitions and insufficient pouring, improves the production efficiency and quality of the furnace body, and reduces the occurrence of slag eye defects.
Smart Images
Figure CN119657844A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of furnace frame vertical line production casting, in particular to a furnace frame vertical line casting device and method. Background Art
[0002] When the grate is placed horizontally in a vertical line for casting, only one piece can be placed, which is conducive to the molding of the grate, but its yield rate and production efficiency are low; when the grate is placed vertically in a vertical line for casting, two pieces can be placed, and the yield rate and production efficiency are high, but the molding difficulty of the grate is increased. Therefore, for the grate, especially to realize the casting of the grate in the vertical line, and to achieve higher production efficiency, to achieve its smooth molding, to ensure the structural integrity of the parts, and to ensure a smooth surface without obvious appearance defects, is a difficult problem in the casting process.
[0003] The existing grate has a long length, which results in a long molten iron flow rate in the vertical casting production process, especially in the early stage of the process where the molten iron temperature drops rapidly. At the same time, due to its thin wall thickness, a large temperature difference is generated in the filling process of the molten iron, which makes it easy to produce slag eye defects and cold shut and insufficient pouring. Therefore, it does not meet the existing needs. In this regard, the present application proposes a grate vertical casting device and method. Summary of the invention
[0004] The object of the present invention is to provide a grate vertical line casting device and method, wherein two ribs of the grate body arranged opposite to each other in the length direction are connected by a lap joint, and the lap joint can connect the molten iron inside the two ribs, thereby ensuring that the two molten iron can meet and fuse as early as possible during pouring, preventing a significant temperature drop, avoiding cold shut and insufficient pouring, and solving the problems in the prior art.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grate vertical line casting device, comprising a grate body, a grate mold and a lap joint, wherein the grate body is located inside the grate mold, and two grate bodies are arranged inside a single grate mold, and a pouring cup, a main lap joint, a middle layer throttling block and a lower layer throttling block are arranged between the two grate bodies from top to bottom, an upper layer gate, a middle layer gate and a lower layer gate are arranged at one end of the grate body from top to bottom, an upper layer gate, a middle layer gate and a lower layer gate are arranged at one end of the upper layer gate, a middle layer gate and a lower layer gate are respectively arranged with an upper layer lap joint, a middle layer lap joint and a lower layer lap joint, and a plurality of exhaust strips are arranged on the side of the grate mold.
[0006] Preferably, the pouring cup, main overlap, middle-layer throttling block and lower-layer throttling block are connected by a runner, and along the direction of molten iron movement, the molten iron passes through the pouring cup, main overlap, middle-layer throttling block, lower-layer throttling block, lower-layer gate, middle-layer gate and upper-layer gate in sequence.
[0007] Preferably, at least two upper overlaps are provided, and both upper overlaps are connected to the main overlap and the runner between the middle throttling block.
[0008] Preferably, at least two middle layer overlaps are provided, and both middle layer overlaps are connected to the runner between the middle layer throttling block and the lower layer throttling block.
[0009] Preferably, at least two lower layer overlaps are provided, and both lower layer overlaps are connected to the runner at the lower end of the lower layer throttling block.
[0010] A method for casting a vertical line of a grate is implemented based on a grate vertical line casting device, comprising the following steps: Step 1: Clean the furnace frame mold, clean the lower gate, middle gate and upper gate, and ensure that the thickness of the three is less than 1.6mm; Step 2: Add the metal material of the casting furnace frame body into the smelting furnace to melt it into molten iron; Step 3: Raise the temperature of the molten iron to 1400°C and pour the molten iron into the furnace frame mold through the pouring cup, using high temperature pouring; Step 4: After the molten iron is cooled and solidified inside the part cavity, open the furnace frame mold, take out the furnace frame body, and clean the surface of the furnace frame body.
[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention connects two ribs of the grate body in the length direction and arranged oppositely by a lap joint. The lap joint can connect the molten iron of the unconnected parts at both ends of the two ribs, ensuring that the two streams of molten iron inside the two ribs can intersect and fuse as early as possible during pouring, preventing a significant temperature drop, and avoiding the problems of cold shut and insufficient pouring due to the structure of the grate body itself. At the same time, the temperature of the molten iron is controlled at 1400°C~1440°C during the initial pouring, and high-temperature pouring is adopted to reduce the risk of cold shut caused by temperature drop.
[0012] 2. The present invention injects molten iron from the pouring cup into the interior of the grate mold, and the molten iron passes through the main overlap, the middle throttling block, the lower throttling block, the lower gate, the middle gate and the upper gate in sequence, wherein the main overlap filters the molten iron and has the effect of avoiding slag, and the middle throttling block and the lower throttling block prevent the molten iron from flowing faster due to the free fall motion during pouring, thereby ensuring that the molten iron can enter the interior of the part cavity in a balanced manner and achieving a consistent flow rate. At the same time, in the process of the molten iron filling the part cavity, the air pressure in the cavity increases rapidly, and the gas in the cavity is discharged from a plurality of exhaust strips, thereby ensuring that the molten iron can fill the part cavity, thereby improving the production quality of the grate body. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a partial structural schematic diagram of the furnace frame mold of the present invention; Figure 2 A view of a furnace body of the present invention; Figure 3 A top view of the furnace body of the present invention; Figure 4 It is a cross-sectional view of the furnace frame body of the present invention.
[0014] In the figure: 1. furnace frame body; 2. pouring cup; 3. main overlap; 4. upper overlap; 5. upper gate; 6. middle throttling block; 7. middle overlap; 8. middle gate; 9. lower throttling block; 10. lower overlap; 11. lower gate; 12. exhaust strip; 13. overlap piece; 14. furnace frame mold. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0016] In order to solve the problem of slag eye defects, cold shut and insufficient pouring in the vertical casting process of the furnace frame, please refer to Figure 1-4 , this embodiment provides the following technical solutions: A grate vertical line casting device comprises a grate body 1, a grate mold 14 and a lap piece 13, the grate body 1 is located inside the grate mold 14, two grate bodies 1 are arranged inside a single grate mold 14, a pouring cup 2, a main lap 3, a middle layer throttling block 6 and a lower layer throttling block 9 are arranged between the two grate bodies 1 from top to bottom, an upper layer gate 5, a middle layer gate 8 and a lower layer gate 11 are arranged at one end of the grate body 1 from top to bottom, an upper layer lap 4, a middle layer lap 7 and a lower layer lap 10 are arranged at one end of the upper layer gate 5, the middle layer gate 8 and the lower layer gate 11 respectively, and a plurality of exhaust strips 12 are arranged on the side of the grate mold 14.
[0017] Specifically, the overlap piece 13 connects two ribs of the grate body 1 that are arranged opposite to each other in the length direction. The overlap piece 13 can connect the molten iron of the unconnected parts at both ends of the two ribs, ensuring that the two streams of molten iron inside the two ribs can intersect and fuse as early as possible during pouring to prevent a significant drop in temperature, and avoid the problems of cold shut and insufficient pouring caused by the structure of the grate body 1 itself. The overlap piece 13 needs to be as thin and narrow as possible to facilitate removal from the grate body 1 after the parts are formed, and to ensure that there is no lack of meat, and that the excess meat is not too much, and to facilitate subsequent cleaning and removal. At the same time, the temperature of the molten iron is controlled at 1400℃~1440℃ during the initial pouring, and high-temperature pouring is adopted to further reduce the risk of cold shut caused by temperature drop.
[0018] The initial temperature of the molten iron cannot be controlled to be lower than or exceed the given requirements. If the initial pouring temperature is low, the temperature of the molten iron entering the part cavity will also be low, and the temperature at the intersection of the two molten irons will be even lower. Once the liquidus temperature is reached, the two molten irons will be difficult to merge, and cold shut and insufficient pouring will easily occur. The lower temperature will result in poor fluidity of the molten iron, accompanied by casting defects such as slag eyes.
[0019] The pouring cup 2, the main overlap 3, the middle layer throttling block 6 and the lower layer throttling block 9 are connected by a runner. Along the direction of movement of the molten iron, the molten iron passes through the pouring cup 2, the main overlap 3, the middle layer throttling block 6, the lower layer throttling block 9, the lower layer gate 11, the middle layer gate 8 and the upper layer gate 5 in sequence. There are at least two upper layer overlaps 4, and both of the two upper layer overlaps 4 are connected to the runner between the main overlap 3 and the middle layer throttling block 6. There are at least two middle layer overlaps 7, and both of the two middle layer overlaps 7 are connected to the runner between the middle layer throttling block 6 and the lower layer throttling block 9. There are at least two lower layer overlaps 10, and both of the two lower layer overlaps 10 are connected to the runner at the lower end of the lower layer throttling block 9.
[0020] Specifically, after the molten iron is injected into the furnace frame mold 14 from the pouring cup 2, the main overlap 3 filters the molten iron, which has the effect of avoiding slag. The middle throttling block 6 and the lower throttling block 9 prevent the molten iron from flowing faster due to the free fall movement during pouring, thereby ensuring that the molten iron can enter the part cavity evenly and achieve a consistent flow rate. At the same time, in the process of molten iron filling the part cavity, the molten iron filling time must be fast, and the pouring must be completed before the molten iron temperature drops significantly. The air pressure in the cavity increases rapidly with the injection of molten iron, and the gas in the cavity is discharged from multiple exhaust strips 12 to ensure that the molten iron can fill the part cavity, thereby improving the production quality of the furnace frame body 1.
[0021] A method for casting a vertical line of a grate is implemented based on a grate vertical line casting device, and is characterized by comprising the following steps: Step 1: clean the furnace frame mold 14, clean the lower gate 11, the middle gate 8 and the upper gate 5, and ensure that the thickness of the three is less than 1.6 mm, so as to help to achieve a good slag avoidance effect in the filling process, ensure the purity of the molten iron that finally enters the part cavity, and thus achieve no obvious slag eyes and other appearance defects on the surface of the part. At the same time, after the pouring and cooling are completed, the thinner gate can achieve good separation in the later separation stage of the casting, and has the advantages of less residue at the gate position and easy cleaning and polishing; Step 2: Add the metal material of the casting grate body 1 into the smelting furnace to melt it into molten iron; Step 3: Raise the temperature of the molten iron to 1400°C-1440°C, and pour the molten iron into the interior of the grate mold 14 through the pouring cup 2. Using high-temperature pouring, the molten iron enters the interior of the part cavity from the lower pouring gate 11, the middle pouring gate 8 and the upper pouring gate 5 in sequence, realizing a three-layer stepped water inlet method for the molten iron. Step 4: After the molten iron is cooled and solidified inside the part cavity, the grate mold 14 is opened to take out the grate body 1, and the surface of the grate body 1 is cleaned to remove burrs and excess parts, and finally the grate body 1 is quality inspected to ensure that it meets the design requirements.
[0022] Working principle: The two ribs of the grate body 1 that are arranged opposite to each other in the length direction are connected by the overlap plate 13. The overlap plate 13 can connect the molten iron at the two ends of the two ribs that are not connected, ensuring that the two streams of molten iron inside the two ribs can meet and merge as soon as possible during pouring, preventing a significant drop in temperature and avoiding the problems of cold shut and insufficient pouring due to the structure of the grate body 1 itself.
[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A furnace vertical line casting device, comprising a furnace body (1), characterized in that; It also includes a furnace frame mold (14) and a lap joint (13), wherein the furnace frame body (1) is located inside the furnace frame mold (14), and two furnace frame bodies (1) are arranged inside a single furnace frame mold (14), and a pouring cup (2), a main lap joint (3), a middle layer throttling block (6) and a lower layer throttling block (9) are arranged between the two furnace frame bodies (1) from top to bottom, and an upper layer pouring gate (5), a middle layer pouring gate (8) and a lower layer pouring gate (11) are arranged in sequence from top to bottom at one end of the furnace frame body (1), and an upper layer lap joint (4), a middle layer lap joint (7) and a lower layer lap joint (10) are arranged at one end of the upper layer pouring gate (5), the middle layer pouring gate (8) and the lower layer pouring gate (11), respectively, and a plurality of exhaust strips (12) are arranged on the side of the furnace frame mold (14).
2. A furnace vertical line casting device according to claim 1, characterized in that: The pouring cup (2), the main overlap (3), the middle layer throttling block (6) and the lower layer throttling block (9) are connected via a runner, and along the direction of movement of the molten iron, the molten iron passes through the pouring cup (2), the main overlap (3), the middle layer throttling block (6), the lower layer throttling block (9), the lower layer pouring gate (11), the middle layer pouring gate (8) and the upper layer pouring gate (5) in sequence.
3. A furnace vertical line casting device according to claim 1, characterized in that: At least two upper layer overlaps (4) are provided, and both upper layer overlaps (4) are connected to the runner between the main overlap (3) and the middle layer throttling block (6).
4. A furnace vertical line casting device according to claim 1, characterized in that: At least two middle layer overlaps (7) are provided, and both middle layer overlaps (7) are connected to the runner between the middle layer throttling block (6) and the lower layer throttling block (9).
5. The vertical line casting device of the furnace frame according to claim 1, characterized in that: At least two lower layer overlaps (10) are provided, and both lower layer overlaps (10) are connected to the pouring channel at the lower end of the lower layer throttling block (9).
6. A method for casting a vertical line of a grate, implemented based on a grate vertical line casting device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Clean the furnace frame mold (14), clean the lower gate (11), the middle gate (8) and the upper gate (5), and ensure that the thickness of the three is less than 1.6 mm; Step 2: adding the metal material of the casting furnace frame body (1) into the interior of the smelting furnace to melt it into molten iron; Step 3: raising the temperature of the molten iron to 1400° C. and pouring the molten iron into the interior of the grate mold (14) through the pouring cup (2) using high temperature pouring; Step 4: After the molten iron is cooled and solidified inside the part cavity, the furnace frame mold (14) is opened to take out the furnace frame body (1), and the surface of the furnace frame body (1) is cleaned.