Bottom pouring type casting ladle with flow adjusting function

Abstract

The invention relates to the technical field of metallurgical casting, and discloses a bottom pouring type casting ladle with a flow adjusting function, which comprises a casting ladle main body, a nozzle seat brick, an upper plate mounting seat, a lower plate mounting seat, a main mounting seat, an upper corundum brick plate, a lower corundum brick plate, a linear motor and the like. The upper corundum brick plate, the lower corundum brick plate and the fixing and limiting device are additionally arranged at the bottom of a traditional bottom pouring type casting ladle to form the integrated bottom pouring type casting ladle with the flow adjusting function, the lower corundum brick plate is driven by the linear motor to move to change the circulation cross sectional area of the upper corundum brick plate and the lower corundum brick plate, and therefore liquid metal flow control is achieved. The whole bottom pouring type casting ladle is compact and simple in structure, high in universality and suitable for casting of molten steel, molten aluminum, molten iron and other liquid metal.

Description

Technical Field

[0001] This invention relates to the field of metallurgical casting technology, and more specifically, to a bottom-pouring ladle with flow regulation function. Background Technology

[0002] In the steel smelting and casting process, the flow rate and pouring speed of the molten metal directly affect the integrity of the mold filling and the internal quality of the casting, making them core control parameters in the casting process. Excessive flow rate can lead to defects such as porosity and inclusions. Insufficient flow rate can easily cause surface defects such as sand inclusions and sand adhesion. Therefore, rationally adjusting the flow rate of the molten metal (e.g., molten steel) and iron according to the mold is crucial for casting quality.

[0003] Currently, the main problems are as follows:

[0004] Existing bottom-pouring ladles do not have the ability to regulate liquid metals (such as molten steel) or molten iron. They require the use of graphite stoppers in conjunction with submerged entry nozzles, but this depends on the operator's skill level and the regulation effect is poor. At the same time, graphite rods are prone to sticking together, leading to leakage, and graphite stoppers are also prone to breakage, which can cause casting accidents.

[0005] Therefore, how to improve the current bottom-pouring ladle structure and thus achieve the regulation of liquid metal (such as molten steel) and molten iron flow rate is a key technology that researchers in the field of metallurgical casting urgently need to solve. Summary of the Invention

[0006] In view of this, the present invention proposes a bottom-pouring ladle with flow rate regulation function, the specific technical solution of which is as follows: A bottom-pouring ladle with flow regulation function includes a ladle body. A nozzle seat brick, interference-fitted with the ladle body, is installed at the center of the bottom of the ladle body. A first nozzle is formed on the nozzle seat brick. An upper plate mounting seat, with a clearance fit to the nozzle seat brick, is fixedly connected below the ladle body. A second nozzle is formed on the upper plate mounting seat. The outer bottom of the upper plate mounting seat has a space for placing an upper corundum brick plate, which is clearance-fitted with the upper plate mounting seat. A third nozzle on the upper corundum brick plate is vertically connected to the first and second nozzles. A main mounting seat with an inner cavity and an open top is fixedly connected below the upper plate mounting seat. The main mounting seat also has a bottom plate strip opening and a side plate opening. A linear motor is installed on the outer wall of the main mounting seat corresponding to the side plate opening. The motor extension rod of the linear motor passes through the side plate opening. The plate opening extends into the main mounting base and is fixedly connected to the lower plate mounting base, which is slidably installed in the main mounting base. The length direction of the strip opening in the bottom plate is consistent with the extension and retraction direction of the motor telescopic rod and the sliding direction of the lower plate mounting base. The lower plate mounting base has space for placing the lower corundum brick plate. The lower corundum brick plate and the lower plate mounting base are fitted with a clearance fit, and several pre-tension springs are installed between the lower corundum brick plate and the lower plate mounting base. The pre-tension force applied by the pre-tension springs makes the lower corundum brick plate and the upper corundum brick plate fit tightly together. The bottom of the lower plate mounting base has a bottom plate center opening that corresponds vertically to the bottom plate strip opening. The fourth water inlet extending from the lower corundum brick plate passes through the bottom plate center opening and the bottom plate strip opening in sequence. Furthermore, the fourth water inlet can be moved to below the third water inlet to achieve vertical connection with the third water inlet.

[0007] Preferably, the outer surface of the sprue seat brick for clearance fitting with the upper plate mounting seat, the inner wall of the space in the upper plate mounting seat for placing the upper corundum brick plate, the inner wall of the space in the lower plate mounting seat for placing the lower corundum brick plate, and the inner wall of the cavity of the main mounting seat are all coated with refractory paint.

[0008] Preferably, the refractory coating is an alumina ceramic high-temperature resistant coating, and the refractory coating is applied to the corresponding structural surface using a plasma spraying method.

[0009] Preferably, both the upper and lower corundum brick slabs are made of corundum refractory material.

[0010] Preferably, an anti-adhesion coating is applied between the upper corundum brick plate and the lower corundum brick plate.

[0011] Preferably, the bottom of the inner cavity of the lower plate mounting base is provided with a plurality of preload spring mounting holes, and the plurality of preload springs are installed in the preload spring mounting holes one by one.

[0012] Preferably, guide steel bars are installed on both sides of the outer bottom of the lower plate mounting base, which are aligned with the length direction of the strip opening of the base plate. The main mounting base is provided with a smooth boss and a smooth sidewall after surface treatment. The guide steel bars slide on the smooth boss and are guided by the smooth sidewall. The guide steel bars and the main mounting base are in clearance fit.

[0013] Preferably, there are thermal deformation and expansion gaps between the lower plate mounting base and the upper corundum brick plate, the upper plate mounting base, and the main mounting base.

[0014] Preferably, both ends of the main mounting base in the extension direction of the bottom plate strip opening are limited. When the linear motor drives the lower plate mounting base and the lower corundum brick plate to one of the limited ends, the fourth water inlet and the third water inlet are connected vertically. At this time, the flow cross-sectional area between the upper corundum brick plate and the lower corundum brick plate is the largest, which is the maximum opening. When the linear motor drives the lower plate mounting base and the lower corundum brick plate to the other limited end, the fourth water inlet and the third water inlet are completely misaligned. At this time, the flow cross-sectional area between the upper corundum brick plate and the lower corundum brick plate is zero, and the lower corundum brick plate completely closes the water inlet channel.

[0015] Compared with existing technologies, the bottom-pouring ladle with flow rate regulation function of the present invention has the following beneficial effects: (1) The present invention adds upper and lower corundum brick plates and fixing and limiting devices to the bottom of the traditional bottom pouring ladle to form an integrated bottom pouring ladle with flow regulation function. The lower corundum brick plate is moved by a linear motor to change the flow cross-sectional area of ​​the upper and lower corundum brick plates, thereby realizing the flow control of liquid metal.

[0016] (2) In this invention, guide steel strips are used on both sides of the lower plate mounting base for guidance, and several sets of pre-tightening springs are added to the bottom of the lower corundum brick plate so that the lower corundum brick plate can still stick tightly to the upper corundum brick plate during the movement process to prevent leakage.

[0017] (3) The bottom-pouring ladle structure of the present invention is compact, simple, and highly versatile, and is suitable for casting liquid metals such as molten steel, molten aluminum, and molten iron. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a bottom-pouring ladle with flow rate regulation function according to the present invention.

[0020] Figure 2 This is a front sectional view of a bottom-pouring ladle with flow rate regulation function according to the present invention.

[0021] Figure 3 This is a bottom view of a bottom-pouring ladle with flow rate regulation function according to the present invention.

[0022] Figure 4 for Figure 3 Sectional view of section AA in the image.

[0023] Figure 5 This is a schematic diagram of the main mounting base in this invention.

[0024] Figure 6 This is a schematic diagram of the structure of the lower plate mounting base in this invention.

[0025] Figure 7 This is a top view of the lower plate mounting base in this invention.

[0026] Figure 8 This is a schematic diagram of the upper plate mounting base in this invention.

[0027] Figure 9 This is a schematic diagram of the structure of the corundum brick plate in this invention.

[0028] Figure 10 This is a schematic diagram of the structure of the corundum brick plate in this invention.

[0029] Figure 11 This is a cross-sectional view of the corundum brick plate in this invention.

[0030] Figure 12 This is a schematic diagram of the structure of the water inlet seat brick in this invention.

[0031] Figure 13 This is a cross-sectional view of the water inlet seat brick in this invention.

[0032] Figure 14 This is a schematic diagram of a bottom-pouring ladle with flow regulation function in a intercepted state according to the present invention.

[0033] Figure 15 This is a schematic diagram of a bottom-pouring ladle with flow rate regulation function in a fully open state according to the present invention.

[0034] In the diagram: 1-Pouring ladle body, 2-Sprue seat brick, 3-First sprue, 4-Upper plate mounting seat, 5-Second sprue, 6-Upper corundum brick plate, 7-Third sprue, 8-Main mounting seat, 9-Bottom plate strip opening, 10-Side plate opening, 11-Linear motor, 12-Lower plate mounting seat, 13-Lower corundum brick plate, 14-Preload spring, 15-Bottom plate center opening, 16-Fourth sprue, 17-Preload spring mounting hole, 18-Guide steel bar, 19-Smooth boss, 20-Upper plate connecting bolt, 21-Upper and lower mounting seat connecting bolt, 22-Motor seat connecting bolt, 23-Motor rod connecting bolt, 24-Steel bar connecting bolt. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 invention 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 invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] Example: like Figures 1-13 As shown, the present invention provides a bottom-pouring ladle with flow rate regulation function, including a ladle body 1, a sprue seat brick 2 that is interference-fitted with the bottom of the ladle body 1 is installed in the middle, the sprue seat brick 2 has a first sprue 3, and an upper plate mounting seat 4 is fixedly connected to the bottom of the ladle body 1 by an upper plate connecting bolt 20. The upper plate mounting seat 4 and the sprue seat brick 2 are clearance-fitted, and a second sprue 5 is provided on the upper plate mounting seat 4.

[0039] The bottom of the upper plate mounting base 4 has a space for placing the upper corundum brick plate 6. The upper corundum brick plate 6 is fitted with the upper plate mounting base 4 with a clearance, and the third water inlet 7 on the upper corundum brick plate 6 is connected to the first water inlet 3 and the second water inlet 5 in a vertically corresponding manner.

[0040] The upper mounting base 4 is fixedly connected to the main mounting base 8, which has an inner cavity and an open top, by the upper and lower mounting base connecting bolts 21. The main mounting base 8 also has a bottom plate strip opening 9 and a side plate opening 10. A linear motor 11 is fixedly connected to the outer wall of the main mounting base corresponding to the side plate opening 10 by the motor base connecting bolts 22. The motor extension rod of the linear motor 11 extends into the main mounting base 8 through the side plate opening 10 and is fixedly connected to the lower mounting base 12, which is slidably installed in the main mounting base 8, by the motor rod connecting bolts 23. The length direction of the bottom plate strip opening 9 is consistent with the extension direction of the motor extension rod and the sliding direction of the lower mounting base 12.

[0041] The lower plate mounting base 12 has a space for placing the lower corundum brick plate 13. The lower corundum brick plate 13 is clearance-fitted with the lower plate mounting base 12, and several pre-tightening springs 14 are installed between the lower corundum brick plate 13 and the lower plate mounting base 12. The pre-tightening force applied by the pre-tightening springs 14 makes the lower corundum brick plate 13 and the upper corundum brick plate 6 fit tightly together. That is, the lower corundum brick plate 13 fits tightly with the upper corundum brick plate 6 under the pressure of the pre-tightening springs 14 and the connecting bolts 21 of the upper and lower mounting bases to prevent leakage.

[0042] The bottom of the lower plate mounting base 12 has a bottom plate center opening 15 that corresponds vertically to the bottom plate strip opening 9. The fourth water inlet 16 extending from the lower corundum brick plate 13 passes through the bottom plate center opening 15 and the bottom plate strip opening 9 in sequence. Furthermore, the fourth water inlet 16 can be moved to the bottom of the third water inlet 7 to achieve vertical connection with the third water inlet 7.

[0043] like Figure 14 , Figure 15 As shown, by moving the lower plate mounting base 12 and the lower corundum brick plate 13 with the linear motor 11, the flow of liquid metal can be controlled by changing the cross-sectional area of ​​the flow between the upper and lower corundum brick plates.

[0044] In a further specific embodiment, the outer surface of the sprue seat brick 2 for clearance fit with the upper plate mounting seat, the inner wall of the space in the upper plate mounting seat 4 for placing the upper corundum brick plate, the inner wall of the space in the lower plate mounting seat 12 for placing the lower corundum brick plate 13, and the inner wall of the cavity of the main mounting seat 8 (that is, the structure corresponding to the clearance fit in this embodiment) are all sprayed with refractory coating to prevent the mechanism from jamming after the parts are heated and expanded during the casting process.

[0045] Furthermore, the refractory coating is an alumina ceramic high-temperature resistant coating, and the refractory coating is applied to the corresponding structural surface using a plasma spraying method.

[0046] In this embodiment, both the upper corundum brick plate 6 and the lower corundum brick plate 13 are made of corundum refractory material. At the same time, an anti-adhesion coating is applied between the upper corundum brick plate 6 and the lower corundum brick plate 13 to prevent the overall mechanism from jamming or becoming stuck during the flow of liquid metal (such as molten steel).

[0047] In a further specific embodiment, the bottom of the inner cavity of the lower plate mounting base 12 is provided with a plurality of pre-tightening spring mounting holes 17 (specifically 6 pre-tightening spring mounting holes in this embodiment), and a plurality of pre-tightening springs 14 are installed in the pre-tightening spring mounting holes 17 one by one.

[0048] In a further specific embodiment, such as Figure 4 , Figure 5As shown, the bottom sides of the lower plate mounting base 12 are connected by steel strip connecting bolts 24 to guide steel strips 18 that are aligned with the length direction of the strip opening of the base plate. The main mounting base 8 is provided with a smooth boss 19 and a smooth sidewall after surface treatment. The guide steel strip 18 slides on the smooth boss 19 and is guided by the smooth sidewall to reduce overall friction. The guide steel strip 18 and the main mounting base 8 are in clearance fit.

[0049] In this embodiment, there are thermal deformation and expansion gaps between the lower plate mounting base 12 and the upper corundum brick plate 6, the upper plate mounting base 4, and the main mounting base 8.

[0050] In a further specific embodiment, such as Figure 14 , Figure 15 As shown, the main mounting base 8 is limited at both ends in the direction of the strip opening of the bottom plate. When the linear motor 11 drives the lower plate mounting base 12 and the lower corundum brick plate 13 to move to one end (i.e., the right end) and is limited, the fourth water inlet 16 and the third water inlet 7 are connected vertically. At this time, the cross-sectional area of ​​the flow between the upper corundum brick plate 6 and the lower corundum brick plate 13 is the largest, which is the maximum opening. When the linear motor 11 drives the lower plate mounting base 12 and the lower corundum brick plate 13 to move to the other end (i.e., the left end) and is limited, the fourth water inlet 16 and the third water inlet 7 are completely offset. At this time, the cross-sectional area of ​​the flow between the upper corundum brick plate 6 and the lower corundum brick plate 13 is zero, and the lower corundum brick plate 13 completely closes the water inlet channel to achieve the interception of liquid metal.

[0051] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bottom-pouring ladle with flow rate regulation function, characterized in that, The system includes a ladle body, with an interference-fit sprue seat brick installed at the bottom center of the ladle body. A first sprue is formed on the sprue seat brick. An upper plate mounting seat, with a clearance fit to the sprue seat brick, is fixedly connected below the ladle body. A second sprue is formed on the upper plate mounting seat. The outer bottom of the upper plate mounting seat has space for placing an upper corundum brick plate, which is clearance-fitted to the upper plate mounting seat. A third sprue on the upper corundum brick plate is vertically connected to the first and second sprue holes. A main mounting seat with an inner cavity and an open top is fixedly connected below the upper plate mounting seat. The main mounting seat also has a bottom plate strip opening and a side plate opening. A linear motor is mounted on the outer wall of the main mounting seat corresponding to the side plate opening. The motor extension rod of the linear motor extends into the main mounting seat through the side plate opening. The lower plate mounting seat is fixedly connected to the main mounting seat and slidably installed in the base. The length direction of the strip opening of the base plate is consistent with the extension direction of the motor telescopic rod and the sliding direction of the lower plate mounting seat. The lower plate mounting seat has a space for placing the lower corundum brick plate. The lower corundum brick plate and the lower plate mounting seat are fitted with a clearance fit. Several pre-tension springs are installed between the lower corundum brick plate and the lower plate mounting seat. The pre-tension force applied by the pre-tension springs makes the lower corundum brick plate and the upper corundum brick plate fit tightly together. The bottom of the lower plate mounting seat has a center opening of the base plate that corresponds to the strip opening of the base plate. The fourth water inlet extending from the lower corundum brick plate passes through the center opening of the base plate and the strip opening of the base plate in sequence. Furthermore, the fourth water inlet can be moved to the bottom of the third water inlet to achieve vertical connection with the third water inlet.

2. The bottom-pouring ladle with flow rate regulation function according to claim 1, characterized in that, The outer surface of the sprue seat brick used for clearance fitting with the upper plate mounting seat, the inner wall of the space in the upper plate mounting seat used for placing the upper corundum brick plate, the inner wall of the space in the lower plate mounting seat used for placing the lower corundum brick plate, and the inner wall of the cavity of the main mounting seat are all sprayed with refractory coating.

3. A bottom-pouring ladle with flow rate regulation function according to claim 2, characterized in that, The refractory coating is a high-temperature resistant alumina ceramic coating, and the refractory coating is applied to the corresponding structural surface using a plasma spraying method.

4. A bottom-pouring ladle with flow rate regulation function according to claim 1, characterized in that, Both the upper and lower corundum brick slabs are made of corundum refractory material.

5. A bottom-pouring ladle with flow rate regulation function according to claim 1 or 4, characterized in that, An anti-adhesion coating is applied between the upper and lower corundum brick slabs.

6. A bottom-pouring ladle with flow rate regulation function according to claim 1, characterized in that, The bottom of the inner cavity of the lower plate mounting base is provided with several preload spring mounting holes, and several preload springs are installed in the preload spring mounting holes one by one.

7. A bottom-pouring ladle with flow rate regulation function according to claim 1, characterized in that, The bottom sides of the lower plate mounting base are equipped with guide steel bars that are aligned with the length direction of the strip opening of the base plate. The main mounting base is equipped with a smooth boss and a smooth sidewall after surface treatment. The guide steel bars slide on the smooth boss and are guided by the smooth sidewall. The guide steel bars and the main mounting base are in clearance fit.

8. A bottom-pouring ladle with flow rate regulation function according to claim 1, characterized in that, There are thermal deformation and expansion gaps between the lower plate mounting base and the upper corundum brick plate, the upper plate mounting base, and the main mounting base.

9. A bottom-pouring ladle with flow rate regulation function according to claim 1, characterized in that, Both ends of the main mounting base are limited in the direction of the strip opening on the bottom plate. When the linear motor drives the lower mounting base and the lower corundum brick plate to one of the limited ends, the fourth and third water inlets are connected vertically. At this time, the cross-sectional area of ​​the flow between the upper and lower corundum brick plates is the largest, which is the maximum opening. When the linear motor drives the lower mounting base and the lower corundum brick plate to the other limited end, the fourth and third water inlets are completely offset. At this time, the cross-sectional area of ​​the flow between the upper and lower corundum brick plates is zero, and the lower corundum brick plate completely closes the water inlet channel.

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