Special flow nozzle for magnesium plate casting and rolling process

Abstract

The utility model relates to the technical field of casting nozzles, in particular to a special flow nozzle for a magnesium plate casting and rolling process, which comprises a flow nozzle body, flow dividing blocks and a connecting component, the connecting component comprises a connector, two mounting blocks, two mounting bolts and two mounting nuts, and the mounting blocks are fixedly connected to two ends of the connector respectively. The two installation bolts are fixedly connected with the two flow nozzle bodies respectively and penetrate through the two installation blocks respectively, the two installation bolts are in threaded connection with installation nuts respectively, the sides, close to the connector, of the two flow nozzle bodies are each provided with a melt inlet, the side, away from the flow nozzle bodies, of the connector is provided with an inlet, and the inlets communicate with the melt inlets. The two flow nozzle bodies are arranged and can be used on a large-specification casting and rolling machine, output of multiple small-specification plates is achieved, the internal structure of the casting and rolling machine is not damaged through the design, and the actual requirement for outputting the multiple small-specification plates through the large-specification casting and rolling machine is met.

Description

Technical Field

[0001] The utility model relates to the technical field of casting nozzles, in particular to a special flow nozzle for magnesium plate casting and rolling process. Background Art

[0002] The special nozzle (casting nozzle) in the magnesium plate casting process is a key component to ensure that the magnesium alloy liquid can be evenly and stably sprayed between the roller surfaces of the casting and rolling mill. How the magnesium alloy melt is diverted in the nozzle will directly affect the quality and output of the strip.

[0003] Publication No. CN202316936 discloses a nozzle for an aluminum alloy casting and rolling mill. The nozzle is a flat, box-shaped structure comprising a melt inlet, a left plate, a right plate, a bottom plate, and a diverter. The diverter comprises several wedge-shaped blocks located at the nozzle inlet and spaced apart across the width of the nozzle. The gaps between the blocks gradually increase from the center to the sides and are symmetrically distributed across the width of the nozzle, with the tips of the blocks facing upward. This effectively ensures uniform melt flow within the nozzle cavity, uniform flow and temperature of the molten metal at the nozzle's front exit, and avoids localized blockage. The device also features a simple structure, easy processing, strong practicality, and low manufacturing cost, making it highly marketable.

[0004] However, the casting nozzle used in the above-mentioned aluminum alloy casting and rolling mill can only realize the output of one large-sized plate, and there is currently no casting nozzle on the market that can realize the output of multiple small-sized plates. Therefore, it is necessary to develop a casting nozzle structure that can be used on a large-sized casting and rolling mill to realize the output of two small-sized plates to meet market demand. Utility Model Content

[0005] The purpose of the utility model is to provide a special flow nozzle for the magnesium plate casting and rolling process, which solves the problem that the existing casting nozzle for aluminum alloy casting and rolling mill can only output one large-sized plate but cannot output multiple small-sized plates, thus failing to meet market demand.

[0006] To achieve the above-mentioned object, the present invention provides a special flow nozzle for magnesium plate casting and rolling process, comprising a flow nozzle body and a diverter block, wherein the number of the diverter blocks is multiple, and the multiple diverter blocks are respectively fixedly connected to the flow nozzle body and are respectively evenly distributed inside the flow nozzle body, and further comprising a connecting assembly;

[0007] There are two nozzle bodies, which are arranged closely together in sequence. The connecting assembly includes a connecting head, a mounting block, a mounting bolt and a mounting nut. The two ends of the connecting head are fixedly connected to the mounting blocks. There are two mounting bolts, which are fixedly connected to the two nozzle bodies and pass through the two mounting blocks respectively. The two mounting bolts are threadedly connected to the mounting nuts respectively. A melt inlet is provided on one side of the two nozzle bodies close to the connecting head, and an inlet is provided on the side of the connecting head away from the nozzle body, and the inlet is communicated with the melt inlet.

[0008] Wherein, the connecting assembly further comprises a plug, which is fixedly connected to one of the nozzle bodies and is located on a side where the two nozzle bodies are adjacent to each other.

[0009] Wherein, the other nozzle body has a limiting groove, and the limiting groove corresponds to the plug.

[0010] Wherein, the special flow nozzle for magnesium plate casting and rolling process further includes a boron nitride coating, and the boron nitride coating is located on the surface wall of the flow nozzle body.

[0011] The magnesium plate casting and rolling process-specific nozzle further comprises an aluminum silicate fiber blanket, which is fixedly connected to the nozzle body and located on the outer wall of the nozzle body.

[0012] The utility model discloses a special flow nozzle for magnesium plate casting and rolling process. When in use, the mounting blocks on both sides of the connecting head are respectively aligned with the two mounting bolts, and then the mounting nuts are screwed on the mounting bolts to fix the two flow nozzle bodies. The magnesium alloy melt enters from the inlet of the connecting head and then flows to the two flow nozzle bodies through the two melt inlets respectively. The magnesium alloy liquid is evenly distributed to each injection port through the diverter block, thereby achieving uniformity of injection. The two flow nozzle bodies can be used on a large-scale casting and rolling mill to realize the output of multiple small-scale plates. Such a design does not destroy the internal structure of the casting and rolling mill, meets the actual needs of outputting multiple small-scale plates through a large-scale casting and rolling mill, effectively improves the utilization rate of the equipment, reduces the cost investment of the enterprise, and improves production efficiency at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0014] Figure 1 It is a schematic diagram of the overall structure of a special flow nozzle for magnesium plate casting and rolling process according to the first embodiment of the present invention.

[0015] Figure 2 This utility model Figure 1 Enlarged view of point A.

[0016] Figure 3 It is a cross-sectional view of a special flow nozzle for magnesium plate casting and rolling process according to the first embodiment of the present invention.

[0017] Figure 4 This utility model Figure 3 Enlarged view of point B.

[0018] Figure 5 This is a schematic diagram of the positions of the boron nitride coating and the aluminum silicate fiber blanket in the second embodiment of the present invention.

[0019] In the figure: 101- nozzle body, 102- diverter block, 103- connector, 104- mounting block, 105- mounting bolt, 106- mounting nut, 107- plug, 108- limiting groove, 109- melt inlet, 110- inlet, 201- boron nitride coating, 202- aluminum silicate fiber blanket. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0021] The first embodiment of this application is:

[0022] See also Figures 1 to 4 ,in, Figure 1 It is a schematic diagram of the overall structure of a special flow nozzle for magnesium plate casting and rolling process according to the first embodiment of the present invention. Figure 2 This utility model Figure 1 Enlarged view of point A. Figure 3 It is a cross-sectional view of a special flow nozzle for magnesium plate casting and rolling process according to the first embodiment of the present invention. Figure 4 This utility model Figure 3 The present invention provides a nozzle specifically designed for magnesium plate casting and rolling, comprising a nozzle body 101, a diverter block 102, and a connection assembly, wherein the connection assembly comprises a connector 103, a mounting block 104, a mounting bolt 105, a mounting nut 106, and a plug 107. The nozzle body 101 has a limiting groove 108. The aforementioned solution solves the problem that existing nozzles for aluminum alloy casting and rolling mills can only output one large-sized plate, but cannot output multiple small-sized plates, thus failing to meet market demand. It is understood that the aforementioned solution can also be used to solve thermal insulation problems.

[0023] According to this specific embodiment, there are multiple diverter blocks 102, and the multiple diverter blocks 102 are fixedly connected to the nozzle body 101 respectively and are evenly distributed inside the nozzle body 101. The nozzle body 101 adopts the casting nozzle principle disclosed in announcement number CN202316936, including the melt inlet 109, the left plate, the right plate, and the bottom plate. The side cross-section is trapezoidal, and multiple wedge-shaped diverter blocks 102 are arranged inside, located at the inlet of the nozzle body 101, and are spaced apart along the width direction of the nozzle body 101. The gap of the diverter blocks 102 gradually increases from the middle to both sides, and is symmetrically distributed along the width direction with the melt inlet 109 as the center. The pointed end of the diverter block 102 faces upward, effectively ensuring that the melt flows evenly in the nozzle cavity.

[0024] Among them, the number of the nozzle bodies 101 is two, and the two nozzle bodies 101 are arranged closely in sequence. The two ends of the connecting head 103 are fixedly connected to the mounting blocks 104 respectively. The number of the mounting bolts 105 is two, and the two mounting bolts 105 are fixedly connected to the two nozzle bodies 101 respectively, and respectively pass through the two mounting blocks 104. The two mounting bolts 105 are respectively threaded with the mounting nuts 106. A melt inlet 109 is respectively provided on the side of the two nozzle bodies 101 close to the connecting head 103, and an inlet 110 is provided on the side of the connecting head 103 away from the nozzle body 101, and the inlet 110 is communicated with the melt inlet 109. After the two nozzle bodies 101 are placed close together, the mounting blocks 104 on both sides of the connecting head 103 are aligned with the mounting bolts 105. After the mounting bolts 105 pass through the mounting blocks 104, the mounting nuts 106 are screwed onto the mounting bolts 105 to connect and fix the two nozzle bodies 101. The magnesium alloy melt enters from the inlet 110 of the connecting head 103 and enters the two nozzle bodies 101 through the two melt inlets 109.

[0025] Secondly, the plug 107 is fixedly connected to one of the nozzle bodies 101 and is located on the side where the two nozzle bodies 101 are adjacent. The other nozzle body 101 has a retaining groove 108 that corresponds to the plug 107. When the two nozzle bodies 101 are adjacent, the plug 107 aligns with the retaining groove 108, positioning the two nozzle bodies 101, thereby better aligning the connector 103 to the two nozzle bodies 101.

[0026] When using a special nozzle for magnesium plate casting and rolling process of this embodiment, the two nozzle bodies 101 are placed close together, the plug 107 is inserted into the limiting groove 108, the installation of the two nozzle bodies 101 is positioned, and then the mounting blocks 104 on both sides of the connecting head 103 are aligned with the two mounting bolts 105 respectively, and then the mounting nuts 106 are screwed on the mounting bolts 105, thereby fixing the two nozzle bodies 101, and installing the two nozzle bodies 101 on the equipment, and the magnesium alloy melt is discharged from the connecting head 103. The magnesium alloy liquid enters through the inlet 110, and then flows to the two nozzle bodies 101 through the two melt inlets 109 respectively, and is evenly distributed to each injection port through the diverter block 102, thereby achieving uniformity of injection. The two nozzle bodies 101 can be used on a large-scale casting and rolling mill to achieve the output of multiple small-scale plates. This design does not destroy the internal structure of the casting and rolling mill, meets the actual needs of outputting multiple small-scale plates through a large-scale casting and rolling mill, effectively improves the utilization rate of the equipment, reduces the cost investment of the enterprise, and improves production efficiency.

[0027] The second embodiment of this application is:

[0028] Based on the first embodiment, please refer to Figure 5 ,in, Figure 5 Schematic diagram of the positions of the boron nitride coating 201 and the aluminum silicate fiber blanket 202 of the second embodiment of the present invention. The nozzle dedicated to the magnesium plate casting process of this embodiment also includes the boron nitride coating 201 and the aluminum silicate fiber blanket 202.

[0029] In this specific embodiment, the boron nitride coating 201 is located on the surface of the nozzle body 101. A layer of the boron nitride coating 201 is applied to the surface of the nozzle body 101. The boron nitride coating 201 is processed as follows: Pretreatment: First, the coating is stirred for 2 to 15 minutes to ensure uniformity. Application: The stirred coating is evenly applied to the surface of the refractory substrate or immersed into the working surface of the refractory material used to make the nozzle body 101. Preliminary Drying: After coating, the coating is dried at approximately 300°C and allowed to dry before use. This step removes excess moisture from the coating to prepare for the subsequent nitriding reaction. Further Processing: The coated substrate is placed in an oven and dried at 110°C for 2-5 hours. Nitriding Reaction: The dried refractory substrate is placed in an ammonia furnace and subjected to a nitriding reaction with ammonia at 900°C to 1000°C for 2-5 hours. This step is a key step in the formation of the boron nitride coating 201. Through the nitriding reaction, certain components in the coating react with ammonia to form boron nitride. Sintering and hardening: Under the protection of nitrogen, continue heating to 1600°C and keep warm for 3-5 hours. The boron nitride coating 201 is sintered and hardened. This step ensures the hardness and durability of the coating. Completion: Under the protection of nitrogen, continue heating to the substrate firing temperature or completely sintering according to the refractory substrate material. At this point, the boron nitride coating 201 has been fully formed and can be applied to various refractory material surfaces, such as the nozzle body 101, flow trough, distribution trough, casting lining, etc., to protect the mold from corrosion and extend its service life.

[0030] The aluminum silicate fiber blanket 202 is fixedly connected to the nozzle body 101 and is located on the outer wall of the nozzle body 101. The aluminum silicate fiber blanket 202 covers the outer wall of the nozzle body 101, ensuring that the magnesium alloy liquid maintains a stable temperature during the injection process, which is beneficial to the casting and rolling sheet forming effect.

[0031] A special flow nozzle for the magnesium plate casting and rolling process of this embodiment is used. The boron nitride coating 201 is coated on the surface wall of the flow nozzle body 101 to protect it from corrosion and extend its service life. A layer of the aluminum silicate fiber blanket 202 is coated on the outer wall to ensure that the magnesium alloy liquid maintains a stable temperature during the injection process, which is beneficial to the casting and rolling plate forming effect.

[0032] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. A nozzle for magnesium plate casting and rolling process, comprising a nozzle body and a diverter block, wherein the diverter blocks are multiple, each of which is fixedly connected to the nozzle body and evenly distributed inside the nozzle body, characterized in that: Also included are connection components; There are two nozzle bodies, which are arranged closely together in sequence. The connecting assembly includes a connecting head, a mounting block, a mounting bolt and a mounting nut. The two ends of the connecting head are fixedly connected to the mounting blocks. There are two mounting bolts, which are fixedly connected to the two nozzle bodies and pass through the two mounting blocks respectively. The two mounting bolts are threadedly connected to the mounting nuts respectively. A melt inlet is provided on one side of the two nozzle bodies close to the connecting head, and an inlet is provided on the side of the connecting head away from the nozzle body, and the inlet is communicated with the melt inlet.

2. The special nozzle for magnesium plate casting and rolling process according to claim 1, characterized in that: The connection assembly further comprises a plug, which is fixedly connected to one of the nozzle bodies and is located on a side where the two nozzle bodies are adjacent to each other.

3. The special nozzle for magnesium plate casting and rolling process according to claim 2, characterized in that: The other nozzle body has a limiting groove, and the limiting groove corresponds to the plug.

4. The special nozzle for magnesium plate casting and rolling process according to claim 1, characterized in that: The special flow nozzle for magnesium plate casting and rolling process further includes a boron nitride coating, and the boron nitride coating is located on the surface wall of the flow nozzle body.

5. The special nozzle for magnesium plate casting and rolling process according to claim 1, characterized in that: The special flow nozzle for magnesium plate casting and rolling process further includes an aluminum silicate fiber blanket, which is fixedly connected to the flow nozzle body and is located on the outer wall of the flow nozzle body.

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