Flow guide casting device for high-temperature casting

Abstract

The diversion casting device comprises a diversion assembly, the diversion assembly comprises a diversion column, the outer surface of the diversion column is divided into an upper diversion area and a lower diversion area in the axial direction of the diversion column, and at least one diversion groove is formed in the outer surface of the diversion column in the upper diversion area; the flow guide grooves extend in the axial direction of the flow guide column, the cross sectional area of each flow guide groove is gradually increased from the lower end to the upper end in the axial direction of the flow guide column, and the flow guide grooves are used for guiding high-temperature melt to flow into the lower flow guide area from the upper flow guide area. The invention aims at providing a stable casting flow field, avoiding the occurrence of an unstable flow field in a sand mold cavity in the casting process, and avoiding the cracking and stripping of a sand mold wall caused by the direct impact of internal high-temperature melt on the sand mold wall.

Description

Technical Field

[0001] The invention belongs to the technical field of casting guide devices, in particular to a high-temperature molten casting guide casting device. Background Art

[0002] Fused-cast refractory materials refer to refractory products made by melting refractory raw materials at high temperatures. The refractory raw materials are high-temperature molten inorganic non-metallic materials, and then casting them. The main preparation process of fused-cast refractory materials includes sand mold preparation, raw material melting, high-temperature casting, annealing and cooling, casting processing, etc. Among them, the high-temperature casting process directly affects the quality of the casting. Especially when preparing certain large-sized fused-cast materials that are difficult to melt, it is necessary to ensure that the casting temperature of the high-temperature melt is in the range of 2050℃-2099℃.

[0003] At present, the existing casting process mainly uses the pouring method to pour the high-temperature molten liquid directly into the sand mold. In this process, the high-temperature molten liquid will enter the mold cavity along the inner wall of the sand mold and gradually fill the inner cavity of the sand mold. Since the inner cavity of the sand mold has a small space, the poured high-temperature molten liquid has a large inertial potential energy, and will form an unstable turbulent flow after entering the mold cavity.

[0004] In the prior art, firstly, the sand mold plate is in direct contact with the high-temperature molten metal and will be subjected to strong thermal scouring, resulting in local material peeling in the contact area, causing a sharp drop in the mechanical strength of the mold and increasing the risk of molten metal penetrating the mold; secondly, the sand mold wall is continuously scoured by the high-temperature flow stream, and the peeled sand mold material is mixed into the high-temperature molten metal, causing inclusions in the casting; thirdly, the large turbulent kinetic energy continuously impacts the cavity wall, which can easily cause the sand mold plate to crack and leak. These problems not only affect the qualified quality of the castings, but also affect the safety of the casting site. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the high temperature casting molten metal enters the mold cavity along the inner wall of the sand mold, causing damage to the mold cavity.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a guide casting device for high-temperature smelting, characterized in that it includes a guide component, the guide component includes a guide column, the outer surface of the guide column is divided into an upper guide area and a lower guide area along its axial direction, and at least one guide groove is arranged on the outer surface of the guide column in the upper guide area, the guide groove extends along the axial direction of the guide column, and the cross-sectional area of ​​the guide groove gradually increases from the lower end to the upper end along the axial direction of the guide column, and is used to guide the high-temperature molten metal from the upper guide area to flow into the lower guide area.

[0007] In a possible embodiment, the guide groove includes an arc-shaped impact surface, and an angle between a line connecting the top and the bottom of the impact surface and the axis of the guide column is 2° to 5°.

[0008] In a possible embodiment, a guide slope is provided at the lower end of the guide groove, and the guide slope is connected to the lower guide area and is used to guide the molten metal in the guide groove to the lower guide area.

[0009] In a possible embodiment, the guide slope is configured as an arc surface or a plane.

[0010] In a possible embodiment, a starting marking line and an ending marking line are provided on the guide column, the starting marking line is provided at a first set distance below the guide groove, and the ending marking line is provided at a second set distance between the lower guide area and the bottom end of the guide column, and the starting marking line and the ending marking line are used to indicate the pouring position during the casting process.

[0011] In a possible embodiment, a central hole extending along the axial direction of the guide column is provided in the guide column, and the guide assembly further includes a cooling member for cooling the guide column, and the cooling member is embedded in the central hole.

[0012] In a possible embodiment, the cooling member includes a U-shaped cooling tube, both ends of which extend out of the guide column to form a water inlet and a water outlet, and the U-shaped cooling tube is arranged in the center hole along the axial direction of the guide column.

[0013] In a possible embodiment, a heat radiation resistant component is further included, which is arranged above the guide column and includes:

[0014] A bottom plate, fixed on the upper part of the guide column;

[0015] A vertical plate, vertically fixed on the bottom plate;

[0016] A connecting plate, disposed on the top of the guide column and connected to the bottom plate through a first connecting column;

[0017] The heat insulation layer is arranged on the bottom surface of the bottom plate and the outer side surface of the vertical plate.

[0018] In some possible embodiments, a lifting device is further included, and the lifting device includes:

[0019] A seat body, the seat body being fixed on the connecting plate;

[0020] A force-bearing plate, the bottom surface of which is connected to the connecting plate via a second connecting column;

[0021] Stabilizing hinges, three stabilizing hinges are arranged on the top surface of the force-bearing disk;

[0022] A lifting plate, wherein the three stabilizing hinges are respectively connected to the lifting plate through connecting rods;

[0023] A lifting rod is arranged on the top of the lifting plate.

[0024] Beneficial effects of the present invention:

[0025] 1) The present invention adopts the design of guiding the high-temperature molten liquid into the sand mold cavity by using the guide column, which effectively avoids the splashing phenomenon of the molten liquid (density 3.8g / cm³~4.2 g / cm³) caused by the traditional 1m~2m pouring height difference. The guide groove in the upper guide area reduces the initial kinetic energy of the molten liquid to prevent it from directly impacting the sand mold wall. At the same time, the casting rod can rise synchronously with the liquid level, which significantly inhibits the formation of turbulence in the mold cavity.

[0026] 2) The present invention uses a guide column to stably guide the molten metal into the bottom of the mold cavity, thereby avoiding direct impact of the molten metal on the sand mold wall, effectively preventing the molding sand from peeling off, reducing the occurrence of inclusion defects in the casting, and improving the quality of the casting.

[0027] 3) The casting rod design of the present invention not only eliminates the potential safety hazard caused by the splashing of high-temperature molten metal, but also effectively prevents the risk of the sand mold wall being broken by impact. Through a more controllable casting process, the safety of the production process is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of a diversion casting device provided in one embodiment of the present invention.

[0029] Figure 2 A schematic diagram of the structure of a guide column provided in one embodiment of the present invention.

[0030] Figure 3 for Figure 2 Sectional view of AA in the figure.

[0031] Figure 4 It is a three-dimensional structural diagram of the anti-thermal radiation structure and the lifting device.

[0032] Figure 5 This is a cross-sectional view of the cooling element installed in the guide column.

[0033] Markings in the figure: 1. guide column; 11. guide groove; 12. upper guide area; 13. guide slope; 14. lower guide area; 15. starting mark line; 16. end mark line; 17. center hole; 2. lifting device; 21. seat body; 22. force plate; 23. connecting rod; 24. lifting rod; 25. lifting plate; 3. anti-thermal radiation component; 31. bottom plate; 32. first column; 33. bottom insulation layer; 34. connecting plate; 35. vertical plate; 36. side insulation layer; 4. cooling part; 41. water inlet; 42. water outlet. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0035] like Figure 1-Figure 3 As shown, this embodiment provides a flow guide casting device for high-temperature melting and casting of large-sized castings. The device includes a flow guide component, which includes a flow guide column 1. The outer surface of the flow guide column 1 is divided into an upper flow guide area 12 and a lower flow guide area 14 in sequence along its axial direction. At least one flow guide groove 11 is provided on the outer surface of the flow guide column in the upper flow guide area 12. The flow guide groove 11 extends along the axial direction of the flow guide column 1. The cross-sectional area of ​​the flow guide groove 11 gradually decreases from the upper end to the lower end along the axial direction of the flow guide column 1, and is used to guide the high-temperature molten liquid to flow stably from the upper flow guide area 12 to the lower flow guide area 14.

[0036] refer to Figure 2 In some possible embodiments, the guide column 1 is configured as a columnar structure that is uniform from top to bottom. The lower guide area 14 is configured as the lower cylindrical surface of the guide column 1 .

[0037] In some possible embodiments, according to brick types of different specifications, the design parameters of the guide column 1 can be selected as follows:

[0038] When the brick size is 800mm×400mm×300mm, the diversion column diversion length ≥1300mm, and the diversion column diameter ≥180mm;

[0039] When the brick size is 1000mm×500mm×300mm, the diversion column diversion length ≥1500mm, and the diversion column diameter ≥200mm;

[0040] When the brick size is 1200mm×600mm×400mm, the diversion column diversion length ≥1700mm, and the diversion column diameter ≥320mm;

[0041] When the brick size is 1400mm×325mm×450mm, the guide column diversion length is ≥1800mm and the guide column diameter is ≥260mm.

[0042] refer to Figure 2, by aligning the discharge port of the arc furnace nozzle with the guide groove 11 of the upper guide area 12, the high-temperature melt is guided to the lower guide area 14 (the lower cylindrical surface of the guide column 1) through the guide groove 11, and enters the bottom of the sand mold cavity through the guidance of the lower guide area 14, thereby realizing the diversion of the melt. The high-temperature melt is guided to the inside of the sand mold cavity through the guide column 1, which reduces the splashing phenomenon of the molten steel entering the sand mold during casting. In addition, since the molten steel will not directly impact the sand mold wall, but is directly introduced into the bottom of the sand mold cavity by general drainage, the impact on the sand mold wall during the casting process is avoided, the material peeling of the sand mold wall is avoided, and the inclusion phenomenon of the casting is reduced.

[0043] In some possible embodiments, Figure 1-Figure 3 The guide groove 11 has an inclined arc-shaped impact surface, and the angle α between the two ends of the arc-shaped impact surface and the axis of the guide column 1 is 2° to 5°. Specifically, the length of the arc-shaped impact surface is 500 mm to 800 mm. The upper edge of the arc-shaped impact surface is greater than 300 mm away from the anti-heat radiation part 3, which can effectively avoid the influence of high-temperature radiation. This design allows the molten metal to flow smoothly along the arc-shaped groove, avoiding the generation of turbulence.

[0044] For further information, please refer to Figure 1-Figure 3 The lower end of the guide groove 11 is provided with a guide slope 13, which is connected to the lower guide area 14. The guide slope 13 is an inclined surface starting from the lower end of the guide groove 11 and ending at the outer surface of the guide column 1. Optionally, the inclined surface can be an arc surface or a plane.

[0045] In some possible embodiments, the length of the lower guide area 14 is 300 mm to 1000 mm, which can be adjusted according to specific casting requirements. A starting mark line 15 and an ending mark line 16 are provided on the guide column 1. Among them, the starting mark line 15 is set at a certain distance from the lower edge of the guide slope 13, and the ending mark line 16 is set at a certain distance from the bottom end of the lower guide area 6 to the guide column 1. Among them, the role of the starting mark line 15 is to mark the maximum depth of the insertion of the pouring rod before casting. On the one hand, it ensures that the high-temperature molten liquid can directly contact the guide area at the beginning of casting; on the other hand, it ensures that the distance between the bottom end surface of the guide column and the bottom surface or liquid surface of the cavity is always maintained within a distance range of 200 mm to 400 mm; the ending mark line 16 is the position where the high-temperature molten liquid is still in contact with the guide column at the end of casting.

[0046] In some embodiments, the guide column 1 is made of high temperature resistant ceramic material or high temperature resistant alloy material.

[0047] In some possible embodiments, Figure 3 and Figure 5As shown, the guide column 1 is provided with a central hole extending along its axial direction, and the guide assembly also includes a cooling member 4 for cooling the guide column 1. Specifically, the cooling member 4 includes a water inlet 41, a water outlet 42 and a U-shaped cooling pipe. The diameters of the water inlet 41, the water outlet 42 and the U-shaped cooling pipe range from 50 mm to 150 mm, and the bent portion of the U-shaped cooling pipe, i.e., the U-shaped cooling channel, is arranged in the central hole along the axial direction of the guide column 1. This design can effectively cool the guide column 1 and maintain its structural stability.

[0048] In some embodiments, Figure 1 and Figure 4 As shown, the flow guide casting device also includes an anti-heat radiation zone 3 arranged above the flow guide column 1. It includes: a bottom plate 31 fixed on the upper part of the flow guide column 1; a vertical plate 35, vertically fixed on the bottom plate 31; a connecting plate 34, arranged on the top of the flow guide column 1 and connected to the bottom plate 31 through a first connecting column 32; a heat insulation layer, including a bottom heat insulation layer 33 and a side heat insulation layer 36, which are respectively arranged on the bottom surface of the bottom plate 31 and the outer side of the vertical plate 35.

[0049] Specifically, the bottom plate 31 adopts a 3 / 5 arc surface design, and the arc radius ranges from 100mm to 500mm. The thickness of the vertical plate 35 is 10mm, and the thickness of the heat insulation layer is 30mm to 50mm. Six first connecting columns 32 are arranged on the lower surface of the connecting plate 34 and connected to the bottom plate 31, and the angle between adjacent first connecting columns 32 is 60°, forming a stable supporting structure.

[0050] In some embodiments, Figure 4 As shown, the diversion casting device also includes a lifting device 2, which includes: a seat body 21, which is a triangular stable seat, fixed on the connecting plate 34; a force-bearing plate 22, whose bottom surface is connected to the seat body 21 through a second connecting column, and has a thickness of 30 mm; three stabilizing hinges, which are evenly distributed at 120° around the center of the upper surface of the force-bearing plate 22; a lifting plate 25, which is connected to the three stabilizing hinges through three connecting rods 23; and a lifting rod 24, which is arranged at the center of the upper surface of the lifting plate 25.

[0051] When this embodiment is used, the lifting rod 25 is connected to the crane hook, and the entire casting device is slowly lifted by the crane, and the casting operation is performed after the position is adjusted. During the casting process, the lifting device can accurately control the lifting of the casting rod to ensure the casting quality, and the lifting speed of the crane is controlled at 0.1 m / s to 0.3 m / s.

[0052] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes 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 apparatus.

[0053] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A flow-guiding casting device for high-temperature smelting, characterized in that: It includes a guide component, which includes a guide column. The outer surface of the guide column is divided into an upper guide area and a lower guide area along its axial direction. At least one guide groove is arranged on the outer surface of the guide column in the upper guide area. The guide groove extends along the axial direction of the guide column. The cross-sectional area of ​​the guide groove gradually increases from the upper end to the lower end along the axial direction of the guide column. The guide groove is used to guide high-temperature molten liquid to flow from the upper guide area to the lower guide area.

2. The flow-injection casting device according to claim 1, characterized in that: The guide groove comprises an arc-shaped impact surface, and the angle between the line connecting the top and the bottom of the impact surface and the axis of the guide column is 2° to 5°.

3. The diversion casting device according to claim 1, characterized in that: A guide slope is provided at the lower end of the guide groove, and the guide slope is connected to the lower guide area and is used to guide the molten metal in the guide groove to the lower guide area.

4. The diversion casting device according to claim 3, characterized in that: The diversion slope is configured as an arc surface or a plane.

5. The diversion casting device according to any one of claims 1 to 4, characterized in that: A starting marking line and an ending marking line are arranged on the guide column. The starting marking line is arranged at a first set distance below the guide groove, and the ending marking line is arranged at a second set distance between the lower guide area and the bottom end of the guide column. The starting marking line and the ending marking line are used to indicate the pouring position during the casting process.

6. The diversion casting device according to claim 1, characterized in that: The guide column is provided with a central hole extending along its axial direction, and the guide assembly further comprises a cooling member for cooling the guide column, and the cooling member is embedded in the central hole.

7. The diversion casting device according to claim 6, characterized in that: The cooling element comprises a U-shaped cooling tube, both ends of which extend out of the guide column to form a water inlet and a water outlet, and the U-shaped cooling tube is arranged in the central hole along the axial direction of the guide column.

8. The induction casting device according to claim 1, characterized in that: Also included is a heat radiation resistant assembly disposed above the guide column, comprising: A bottom plate, fixed on the upper part of the guide column; A vertical plate, vertically fixed on the bottom plate; A connecting plate, disposed on the top of the guide column and connected to the bottom plate through a first connecting column; The heat insulation layer is arranged on the bottom surface of the bottom plate and the outer side surface of the vertical plate.

9. The diversion casting device according to claim 8, characterized in that: Also included is a lifting device, the lifting device comprising: A seat body, the seat body being fixed on the connecting plate; A force-bearing plate, the bottom surface of which is connected to the connecting plate via a second connecting column; Stabilizing hinges, three stabilizing hinges are arranged on the top surface of the force-bearing disk; A lifting plate, wherein the three stabilizing hinges are respectively connected to the lifting plate through connecting rods; A lifting rod is arranged on the top of the lifting plate.

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