Immersed long nozzle

Abstract

The invention discloses a submersed long nozzle, and belongs to the technical field of submersed nozzles. The water port comprises an anti-oxidation pipe and a fireproof water outlet head inserted in the bottom of the anti-oxidation pipe, an inner cavity used for fluid flowing is formed in the anti-oxidation pipe, a water outlet is formed in the fireproof water outlet head, and the inner cavity is communicated with the water outlet. According to the submersed long nozzle, a traditional integrated nozzle structure is changed, part of assemblies can be independently replaced after being damaged, the machining and maintaining cost is reduced, the nozzle does not need to be preheated in advance in the using process, the working efficiency is improved, the structure is simple, the nozzle frame is easy to grab, and operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of submerged nozzles, and specifically to a submerged long nozzle. Background Art

[0002] A submerged nozzle is a refractory pouring sleeve installed at the bottom of an intermediate ladle and inserted below the molten steel surface in a mold in continuous casting equipment. The main function of the submerged nozzle is to prevent secondary oxidation of the ladle stream and splashing of molten steel.

[0003] Currently, traditional integral submerged nozzles are still used for continuous casting operations at home and abroad. This traditional submerged nozzle is made of various raw materials, which are mixed and then processed into shape by isostatic pressing. Its whole body is made of high-temperature resistant materials, and the cost is high.

[0004] However, in actual applications, the inner wall of the traditional submerged nozzle contacts the molten steel. Due to the long-term erosion of the molten steel, the submerged nozzle needs to be replaced as a whole after being damaged. Since its whole body is made of refractory materials, the maintenance cost required is relatively high; at the same time, before use, the submerged nozzle also needs to be preheated in advance to prevent the molten steel from crystallizing and solidifying inside it, and the operation is cumbersome.

[0005] Therefore, we have designed and developed a new type of submerged long nozzle, which changes the traditional integral nozzle structure. The nozzle is designed to consist of an oxidation-proof tube with a lower cost and a refractory water outlet head. The two are detachably connected, and when one party is damaged, it can be replaced in time. While retaining the original nozzle function, the processing and later replacement and maintenance costs are greatly reduced, and the structure is simple and easy to use. Summary of the Invention

[0006] The purpose of the present invention is to provide a submerged long nozzle to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: A submerged long nozzle includes an oxidation-proof tube and a refractory water outlet head inserted at the bottom of the oxidation-proof tube. An inner cavity for fluid flow is provided in the oxidation-proof tube, and a water outlet is provided in the refractory water outlet head. The inner cavity is communicated with the water outlet.

[0008] As a further preferred solution of the present invention: A snap ring is provided at the top of the oxidation-proof tube, and a water inlet communicated with the inner cavity is provided in the middle of the snap ring.

[0009] As a further preferred solution of the present invention: A snap table is provided at the top of the side wall of the refractory water outlet head, and the snap table is inserted into the inside of the oxidation-proof tube.

[0010] Compared with the prior art, the beneficial effects of the present invention are: The immersion long nozzle realizes the function of preventing secondary oxidation of the tundish pouring stream and splashing of molten steel by designing an anti-oxidation tube and a refractory water outlet head that are snap-connected. At the same time, when the middle or bottom of the immersion long nozzle is damaged, it can be disassembled and replaced separately, reducing the replacement cost. Moreover, the anti-oxidation tube can be made of stainless steel, changing the traditional structure that is entirely made of refractory materials and reducing the processing cost. By designing the anti-oxidation tube, the anti-oxidation tube does not come into contact with the internal molten steel fluid during use, eliminating the need to consider the problem of crystallization and solidification of molten steel inside it. In addition, the inner wall is protected from erosion by molten steel, and there is no need to preheat the nozzle in advance during use, simplifying the operation procedure and improving work efficiency. By designing the snap ring, it is convenient to position and grasp the immersion nozzle by the nozzle holder, facilitating use.

[0011] In summary, the immersion long nozzle changes the traditional integral nozzle structure. After some components are damaged, they can be replaced separately, reducing the processing and maintenance costs. During use, there is no need to preheat the nozzle in advance, improving work efficiency. Moreover, the structure is simple, the nozzle holder can easily grasp it, and the operation is convenient. Brief Description of the Drawings

[0012] Figure 1 It is a cross-sectional structural view of the immersion long nozzle of the present invention; Figure 2 It is a front view structural view of the immersion long nozzle of the present invention; Figure 3 It is a schematic diagram of the cooperation between the immersion long nozzle of the present invention and the nozzle holder; Figure 4 It is a schematic diagram of the actual application of the immersion long nozzle of the present invention; Figure 5 It is a structural view of the refractory water outlet head of the immersion long nozzle of the present invention; Figure 6 It is a structural view of the immersion long nozzle of the present invention when the anti-oxidation tube is non-metallic.

[0013] In the figure: 1, snap ring; 2, anti-oxidation tube; 3, refractory water outlet head; 4, water inlet; 5, inner cavity; 6, water outlet; 7, nozzle holder; 8, tundish; 9, mold; 10, clamping platform. Embodiment

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0015] Please refer to Figures 1-5 , this embodiment provides an immersion long nozzle, which includes an anti-oxidation tube 2 and a refractory water outlet head 3 inserted at the bottom of the anti-oxidation tube 2. Specifically, as Figure 5 shown, a clamping platform 10 is provided at the top of the side wall of the refractory water outlet head 3, and the clamping platform 10 is inserted into the inside of the anti-oxidation tube 2. An inner cavity 5 for fluid flow is provided in the anti-oxidation tube 2, and a water outlet 6 is provided in the refractory water outlet head 3. The inner cavity 5 communicates with the water outlet 6. A clamping ring 1 is provided at the top of the anti-oxidation tube 1, and a water inlet 4 communicating with the inner cavity 5 is provided in the middle of the clamping ring 1. Preferably, the anti-oxidation tube 2 and the clamping ring 1 can be made of stainless steel. When processing the anti-oxidation tube 2, its thickness can be processed according to actual needs without specific limitation. In addition, as Figure 6 shown, in actual application, the anti-oxidation tube 2 and the clamping ring 1 can also be made of other non-metallic materials, such as cement and other materials. The thickness of the anti-oxidation tube 2 is thicker than that of the metal material, which are all conventional choices familiar to those skilled in the art and will not be elaborated in this application. The material of the refractory water outlet head 3 is the same as that of the traditional nozzle, and fused quartz or Al2O3-C refractory material can be selected. The selection of the material is a conventional choice familiar to those skilled in the art and will not be elaborated.

[0016] It should be noted that in actual processing, the anti-oxidation tube 2 and the clamping ring 1 can be formed by die-casting and welded together. Since the volume of the refractory material required for the refractory water outlet head 3 is greatly reduced compared to the volume of the refractory material required for the traditional nozzle, the refractory water outlet head 3 can be formed by a press according to the size requirements. The pressure is high and the volume density is high. After forming, it can be inserted at the bottom of the anti-oxidation tube 2. Since the refractory material is saved, the weight of the entire nozzle can be reduced, which is convenient for operation.

[0017] As Figure 3 and Figure 4 shown, in actual application, the nozzle holder 7 needs to be clamped onto the clamping ring 1 to realize the grasping of the nozzle. Then, the top of the nozzle clamping ring 1 is abutted against the lower end of the tundish 8, and the refractory water outlet head 3 is placed below the molten steel surface of the mold 9 for operation. The molten steel flows through the water inlet 4, the inner cavity 5 and the water outlet 6 in sequence and falls into the mold 9. This operation is a conventional operation familiar to those skilled in the art and will not be elaborated. And the nozzle holder 7 is a conventional structure familiar to those skilled in the art and will not be elaborated. Since the molten steel does not contact the inner wall of the inner cavity 5 during flow, there is no need to consider the problem that the inner wall temperature of the inner cavity 5 will cause the molten steel to crystallize and solidify, and the operation process of preheating the nozzle in advance is omitted.

[0018] It should be noted that the above embodiments only specifically and clearly describe the technical solutions and technical features of this application. For those skilled in the art, the solutions or features that belong to the prior art or common knowledge are not described in detail in the above embodiments.

[0019] In addition, the technical solution of this application is not limited to the above embodiments. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An immersion long nozzle, characterized in that, it includes an anti-oxidation tube (2) and a refractory water outlet head (3) inserted at the bottom of the anti-oxidation tube (2). An inner cavity (5) for fluid flow is provided in the anti-oxidation tube (2), and a water outlet (6) is provided in the refractory water outlet head (3). The inner cavity (5) communicates with the water outlet (6).

2. The immersion long nozzle according to claim 1, characterized in that, a snap ring (1) is provided at the top of the anti-oxidation tube (1), and a water inlet (4) communicating with the inner cavity (5) is provided in the middle of the snap ring (1).

3. The immersion long nozzle according to claim 1, characterized in that, a clamping platform (10) is provided at the top of the side wall of the refractory water outlet head (3), and the clamping platform (10) is inserted inside the anti-oxidation tube (2).

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