A nozzle for restraining the flow of molten metal in a vacuum induction furnace

Abstract

The utility model relates to the field of steelmaking, especially a water gap for restraining the pouring and flow dispersion of a vacuum induction furnace. The water gap comprises a cylindrical main body and a ring of hanging edges arranged on the periphery of the top of the cylindrical main body. The cylindrical main body comprises a vortex-breaking section arranged on the upper part, an accelerating section connected to the bottom of the vortex-breaking section, and a flow-dispersion-breaking section connected to the bottom of the accelerating section. At least two vertically arranged vortex-breaking ribs are arranged on the inner wall of the vortex-breaking section along the circumference of the inner wall of the cylindrical main body. The inner diameter of the flow-dispersion-breaking section gradually increases from top to bottom. The design of the flow-dispersion-breaking section in the form of a small horn at the bottom can reduce the horizontal pressure of the molten steel when it flows out, prevent flow dispersion, and form a molten steel flow in strands. The vortex-breaking ribs are arranged on the inner wall of the vortex-breaking section, which can break the swirling vortex in the early pouring stage. The design of the above structure can solve the problem of the existing ordinary straight cylindrical water gap with consistent size of the upper and lower diameters, and the tapping effect is good and safer.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking, and in particular to a nozzle for suppressing the spillage of water during casting in a vacuum induction furnace. Background Technology

[0002] When casting in a vacuum induction furnace (as shown in the attached document) Figure 6 The process involves pouring molten steel from a vacuum induction furnace into a runner, which then injects it into the mold through a nozzle at the bottom of the runner. Existing runner nozzles are simply cylindrical structures with a beveled edge at the top. Molten steel flowing through these nozzles tends to disperse easily, failing to form a cohesive flow, resulting in poor tapping quality, uneven pouring, or spillage outside the mold. Furthermore, at the initial pouring stage, vortices easily form at the nozzle within the runner, further exacerbating the dispersion. Therefore, designing a nozzle that can create vortices at the top and disperse the flow at the bottom is essential. Utility Model Content

[0003] The purpose of this invention is to provide a water inlet that suppresses the spillage of water during casting in a vacuum induction furnace in order to solve the above-mentioned problems.

[0004] This utility model achieves the above objectives through the following technical solutions:

[0005] A sprue for suppressing flow dispersion during casting in a vacuum induction furnace, the sprue comprising a cylindrical body and a ring of hanging edges disposed around the top periphery of the cylindrical body, the cylindrical body comprising a vortex-breaking section at the top, an acceleration section connected to the bottom of the vortex-breaking section, and a flow-dispersing section connected to the bottom of the acceleration section, wherein at least two vertically arranged vortex-breaking ribs are arranged circumferentially along the inner wall of the cylindrical body on the inner wall of the vortex-breaking section, and the inner diameter of the flow-dispersing section gradually increases from top to bottom.

[0006] Preferably, the inner diameter of the vortex-breaking section gradually increases from bottom to top.

[0007] Preferably, the width of the vortex rib gradually decreases from top to bottom and the edges on both sides converge at the bottom end of the vortex rib.

[0008] Preferably, the outer surface of the vortex-breaking rib facing the central axis of the cylindrical body is an arched arc surface, or at least one outwardly protruding secondary vortex-breaking rib is provided on the outer surface of the vortex-breaking rib.

[0009] Preferably, the inner diameter of the acceleration section is a regular cylindrical shape with the same diameter from top to bottom.

[0010] Preferably, a guide section with an arc-shaped guide angle is provided between the top of the vortex-breaking section and the hanging edge, and the upper end of the vortex-breaking rib extends upward and outward to the outer edge of the guide section to form a top rib.

[0011] Preferably, the highest point of the top rib is lower than or flush with the upper surface of the hanging edge.

[0012] Preferably, the vortex-breaking rib extends upward and gradually narrows to form a vortex-breaking section that extends beyond the top of the vortex-breaking segment.

[0013] Beneficial effects:

[0014] This application utilizes a bottom-mounted, funnel-shaped flow-breaking section design to reduce horizontal pressure during molten steel flow, preventing dispersion and creating a continuous stream of molten steel. Simultaneously, vortex-breaking ribs are added to the inner wall of the vortex-breaking section to disperse vortices during the early stages of casting. These design advantages solve the problems associated with conventional, uniformly sized, straight-cylinder nozzles, resulting in better steel tapping and increased safety.

[0015] This application features a simple structure, low cost, and good performance. Molten steel flows out and is poured in a regular, continuous stream, making it safer and more reliable. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional structural diagram of this application;

[0018] Figure 2 This is a schematic diagram of the structure of this application;

[0019] Figure 3 This is a schematic diagram of the structure of this application with top ribs or vortex-breaking sections;

[0020] Figure 4 This is a top view of the structure of this application;

[0021] Figure 5 This is a top view structural diagram of the top rib or the vortex-breaking part of this application;

[0022] Figure 6 This is a schematic diagram of casting in a vacuum induction furnace. Detailed Implementation

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Example 1:

[0026] A sprue for suppressing flow dispersion during casting in a vacuum induction furnace includes a cylindrical body 01 and a hanging edge 1 around the top periphery of the cylindrical body. The cylindrical body includes a vortex-breaking section 2 at the top, an acceleration section 3 connected to the bottom of the vortex-breaking section, and a flow-dispersing section 4 connected to the bottom of the acceleration section. The acceleration section has a uniform inner diameter, forming a regular cylindrical shape. At least two vertically arranged vortex-breaking ribs 21 are arranged circumferentially along the inner wall of the cylindrical body on the inner wall of the vortex-breaking section. The inner diameter of the flow-dispersing section gradually increases from top to bottom.

[0027] This application utilizes a bottom-mounted, funnel-shaped flow-breaking section design to reduce horizontal pressure during molten steel flow, preventing dispersion and creating a continuous stream of molten steel. Simultaneously, vortex-breaking ribs are added to the inner wall of the vortex-breaking section to disperse vortices during the early stages of casting. These design advantages solve the problems associated with conventional, uniformly sized, straight-cylinder nozzles, resulting in better steel tapping and increased safety.

[0028] Example 2:

[0029] The difference from the above embodiment is that the inner diameter of the vortex-breaking section gradually increases from bottom to top. The combination of the flow-collecting fastener and the vortex-breaking ribs makes it less prone to forming vortices, thus improving steel casting efficiency.

[0030] Example 3:

[0031] The difference from the above embodiment lies in that the width of the vortex-breaking rib gradually decreases from top to bottom, and the edges on both sides converge at the bottom end of the vortex-breaking rib. The upper end of the vortex-breaking rib is fine, which can effectively break vortices, while the lower end is thin, which can quickly gather the molten steel into the acceleration section to ensure that the acceleration section is as free from turbulence as possible. After being accelerated and unified in the flow direction in the acceleration section, it is quickly transported to the dispersion section for discharge.

[0032] Example 4:

[0033] The difference from the above embodiment is that the outer surface of the vortex-breaking rib facing the central axis of the cylindrical body is an arched arc surface, or at least one outwardly protruding secondary vortex-breaking rib 211 is provided on the outer surface of the vortex-breaking rib. The arc surface is easy to process and the overall shape is more regular. Of course, in the case of severe vortex, secondary vortex-breaking ribs can also be designed to be added on the vortex-breaking rib, thereby increasing the number of vortex-breaking impact points after the molten steel enters the nozzle and minimizing the formation of vortices.

[0034] Example 5:

[0035] The difference from the above embodiment lies in the presence of a guide section 5 with an arc-shaped bevel between the top of the vortex-breaking section and the hanging edge 1. The upper end of the vortex-breaking rib extends upward and outward to the outer edge of the guide section, forming a top rib 22. The highest point of the top rib is lower than or flush with the upper surface of the hanging edge. The guide section merely allows molten steel to smoothly enter the nozzle; its height is much lower than the vortex-breaking section and other sections, equivalent to the bevel at the top of the existing nozzle. The aforementioned top rib ensures that the molten steel can smoothly enter the nozzle without being blocked in the flow channel, and also ensures that vortex breaking occurs immediately, further improving the vortex-breaking effect.

[0036] Example 6:

[0037] The difference from the above embodiment lies in that the vortex-breaking rib extends upward and gradually narrows to form a vortex-breaking section 23 extending beyond the top of the vortex-breaking segment. This vortex-breaking section design further enhances the vortex-breaking effect, making it virtually impossible for vortices to form above the sprue. This results in smoother steel pouring.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A sprue for suppressing spillage during casting in a vacuum induction furnace, characterized in that: The water inlet includes a cylindrical body (01) and a hanging edge (1) around the top periphery of the cylindrical body. The cylindrical body includes a vortex-breaking section (2) at the top, an acceleration section (3) connected to the bottom of the vortex-breaking section, and a flow-dispersing section (4) connected to the bottom of the acceleration section. At least two vertically arranged vortex-breaking ribs (21) are arranged circumferentially along the inner wall of the cylindrical body on the inner wall of the vortex-breaking section. The inner diameter of the flow-dispersing section gradually increases from top to bottom.

2. The nozzle for suppressing spillage during casting in a vacuum induction furnace according to claim 1, characterized in that: The inner diameter of the vortex-breaking section gradually increases from bottom to top.

3. The nozzle for suppressing spillage during casting in a vacuum induction furnace according to claim 1, characterized in that: The width of the broken vortex rib gradually decreases from top to bottom, and the edges on both sides converge at the bottom end of the broken vortex rib.

4. The water nozzle for suppressing spillage during casting in a vacuum induction furnace according to claim 1, characterized in that: The outer surface of the vortex-breaking rib facing the central axis of the cylindrical body is an arched arc surface, or at least one outwardly protruding secondary vortex-breaking rib is provided on the outer surface of the vortex-breaking rib (211).

5. The nozzle for suppressing spillage during casting in a vacuum induction furnace according to claim 1, characterized in that: The inner diameter of the acceleration section is uniform from top to bottom, forming a regular cylindrical shape.

6. The nozzle for suppressing spillage during casting in a vacuum induction furnace according to claim 1, characterized in that: A guide section (5) with an arc-shaped guide angle is provided between the top of the vortex-breaking section and the hanging edge (1), and the upper end of the vortex-breaking rib extends upward and outward to the outer edge of the guide section to form a top rib (22).

7. The water nozzle for suppressing spillage during casting in a vacuum induction furnace according to claim 6, characterized in that: The highest point of the top rib is lower than or level with the upper surface of the hanging edge.

8. The water nozzle for suppressing spillage during casting in a vacuum induction furnace according to claim 1, characterized in that: The vortex-breaking ribs extend upward and gradually shrink to form a vortex-breaking section (23) that extends beyond the top of the vortex-breaking segment.

Images