Liquid seal type water gate gasket

Abstract

The application provides a liquid-sealed water gap sealing gasket, which comprises a first sealing layer, a sealing agent filling port, a second sealing layer and a sealing agent; the upper end and the lower end of the second sealing layer are respectively provided with the first sealing layer, the inner side and the outer side of the first sealing layer are both protruded from the second sealing layer, the inner side and the outer side of the second sealing layer are both provided with the sealing agent filling port, the sealing agent filling ports on the inner side wall of the second sealing layer and the outer side wall of the second sealing layer are staggered, and the sealing agent filling ports are filled with the sealing agent. The sealing agent filling ports are staggered in the second sealing layer, the sealing agent filling ports are filled with the sealing agent, and the sealing agent forms a liquid slag film between the sealing gasket and the upper and lower water gaps after melting under high temperature, so that the upper and lower water gap joints can be well sealed.

Description

Technical Field

[0001] This invention belongs to the field of sealing technology, and particularly relates to a liquid-sealed sprue gasket. Background Technology

[0002] Submerged entry nozzles are the steel channels connecting the tundish and the crystallizer in the continuous casting process. They play a role in keeping the molten steel warm and preventing secondary oxidation. There are two types: integral and split. Split submerged entry nozzles consist of an upper nozzle and a lower nozzle. The upper nozzle is built into the refractory material at the bottom of the tundish, with its upper end in contact with the stopper rod and its lower end connected to the upper end of the lower nozzle. The lower end of the lower nozzle extends into the crystallizer.

[0003] The joint between the upper and lower nozzles of a split-type nozzle is prone to air intake, leading to secondary oxidation. Currently, fiber-based sealing gaskets are generally used to fill the joint between the upper and lower nozzles of a split-type nozzle to reduce air intake. However, fiber-based sealing gaskets still have pores, and their protective effect is significantly different from that of integral nozzles. Even when argon is used at the joint, the intake air bubbles still adversely affect the surface and subsurface quality of the continuously cast billet. In existing technologies, liquid-sealed sealing gaskets fill the gaps through liquid sealing, which significantly improves the sealing performance compared to using fiber-based sealing gaskets. However, the sealant is prone to overflowing from the sealing gasket, and the sealant is concentrated in one place inside the sealing gasket, failing to effectively fill the gaps between the nozzles, thus greatly reducing its sealing performance. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a liquid-sealed sprue gasket, which improves the sealing performance of the gasket by providing sealant filling ports at intervals on the inner and outer walls of the gasket.

[0005] The technical solution of the present invention is: a liquid-sealed sprue gasket, comprising a first sealing layer, a sealant filling port, a second sealing layer, and a sealant;

[0006] The second sealing layer has a first sealing layer at its upper and lower ends respectively. The inner and outer sides of the first sealing layer protrude from the second sealing layer. The inner and outer walls of the second sealing layer are provided with sealant filling ports. The sealant filling ports on the inner wall of the second sealing layer and the sealant filling ports on the outer wall of the second sealing layer are staggered. The sealant filling ports are filled with sealant.

[0007] In the above scheme, the first sealing layer and the second sealing layer are cylindrical structures.

[0008] In the above scheme, the radial dimension ratio of the first sealing layer to the second sealing layer is 1.01 to 1.2.

[0009] In the above scheme, the first sealing layer is a refractory material.

[0010] In the above scheme, the first sealing layer is a neutral refractory material or a special refractory material.

[0011] In the above scheme, the second sealing layer is a refractory material or a ceramic fiber material.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. In this invention, the sealant filling ports are staggered inside and outside the second sealing layer. The sealant filling ports are filled with sealant. After the sealant melts at high temperature, it forms multiple liquid slag films between the sealing gasket and the upper and lower water inlets, thereby enabling a good seal at the joint between the upper and lower water inlets.

[0014] 2. The present invention provides a first sealing layer at the upper and lower ends of the second sealing layer, and the inner and outer sides of the first sealing layer protrude from the second sealing layer, which can improve the sealing performance of the sealing gasket and prevent the sealant from overflowing after melting at high temperature. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the sealing gasket assembly according to one embodiment of the present invention.

[0016] Figure 2 This is a partially enlarged schematic diagram of the sealing gasket assembly according to an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the sealing gasket structure according to one embodiment of the present invention.

[0018] In the diagram: 1. First sealing layer; 2. Sealant filling port; 3. Second sealing layer. Detailed Implementation

[0019] 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.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "front," "rear," "left," "right," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. 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 indicated technical features. Thus, a feature defined with "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.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 invention according to the specific circumstances.

[0022] like Figure 1 , Figure 2 , Figure 3 The above is a preferred embodiment of the liquid-sealed sprue gasket, which includes a first sealing layer 1, a sealant filling port 2, a second sealing layer 3, and a sealant.

[0023] The upper and lower ends of the second sealing layer 3 are respectively provided with a first sealing layer 1. The size of the first sealing layer 1 is larger than that of the second sealing layer 3. The inner and outer walls of the second sealing layer 3 are provided with sealant filling ports 2. The sealant filling ports 2 on the inner wall of the second sealing layer 3 and the sealant filling ports 2 on the outer wall of the second sealing layer 3 are staggered. The sealant filling ports 2 are filled with sealant.

[0024] Preferably, the sealant filling port 2 can be a fully open structure, which facilitates the filling of sealant.

[0025] Preferably, the sealant filling port 2 can also be a semi-open structure. The cross-sectional area of ​​the opening of the semi-open structure is smaller than the cross-sectional area of ​​the inner cavity. This design is conducive to the storage of sealant and makes it less likely for the sealant to leak out of the opening. When the tundish is opened for pouring, the upper and lower water inlets gradually increase with the pouring temperature. The sealant in the sealant filling port 2 is heated and melts rapidly. The melted sealant flows out of the semi-opening of the sealant filling port 2 to form a liquid slag film, thereby playing a liquid sealing role.

[0026] Preferably, the inner and outer sides of the first sealing layer 1 protrude from the second sealing layer 3.

[0027] Preferably, the first sealing layer 1 and the second sealing layer 3 in the liquid-sealed nozzle gasket have a cylindrical structure, a square structure, an annular structure, or a conical structure.

[0028] Preferably, the liquid-sealed nozzle sealing gasket has a hollow structure.

[0029] Preferably, the liquid-sealed nozzle sealing gasket has a hollow conical structure.

[0030] Preferably, the radial dimension ratio of the first sealing layer 1 to the second sealing layer 3 is 1.01 to 1.2, so that the first sealing layer 1 can make closer contact with the inlet and outlet of the water outlet than the second sealing layer 3, thereby preventing the sealant from overflowing after melting at high temperature.

[0031] Preferably, the first sealing layer 1 is made of refractory fiber. Refractory fiber is a fibrous refractory material and a highly efficient heat insulation material. It possesses the characteristics of general fibers, such as softness and high strength, and can be processed into various papers, tapes, ropes, felts, and blankets, etc. It also has properties that ordinary fibers do not have, such as high temperature resistance, corrosion resistance, and oxidation resistance, overcoming the brittleness of general refractory materials. At the same time, it has a very significant energy-saving effect. As a refractory heat insulation material, it has been widely used in metallurgy, chemical industry, machinery, building materials, shipbuilding, aviation, aerospace and other industrial sectors.

[0032] Preferably, the first sealing layer 1 is a neutral refractory material or a special refractory material. Neutral refractory materials include aluminum oxide, while special refractory materials include aluminum oxide, magnesium oxide, beryllium oxide, zirconium oxide, calcium oxide, fused silica, thorium oxide, uranium oxide, magnesium aluminum spinel, etc.

[0033] Preferably, the second sealing layer 3 is a refractory material or a ceramic fiber material, which has good thermal conductivity and can protect the refractory material of the nozzle from being corroded by the molten sealant, thereby improving the durability of the sealing gasket.

[0034] Preferably, the second sealing layer 3 is made of ceramic fiber material, that is, the inner wall, outer wall, and top surface of the liquid-sealed nozzle gasket are all made of ceramic fiber material. Ceramic fiber is a fibrous, lightweight refractory material with advantages such as light weight, high temperature resistance, good thermal stability, low thermal conductivity, low specific heat, and resistance to mechanical vibration. Therefore, it has been widely used in industries such as machinery, metallurgy, chemical industry, petroleum, ceramics, glass, and electronics.

[0035] Preferably, the sealant composition includes CaO, SiO2, Al2O3, CaF2, MgO, and B2O3. The sealant has a melting point of 520℃ to 680℃, is in powder form at room temperature, and melts into a liquid state in 30 to 60 seconds at high temperature.

[0036] Working principle:

[0037] Before pouring from the tundish, the liquid-sealed gasket is placed on the rim of the drain outlet. The inlet and outlet press the gasket tightly together. The inner and outer sides of the first sealing layer 1 protrude beyond the second sealing layer 3. Therefore, the first sealing layer 1 can make closer contact with the inlet and outlet than the second sealing layer 3, preventing the molten sealant from overflowing and improving the sealing performance of the gasket. After pouring from the tundish, as the pouring temperature gradually rises at the inlet and outlet, the multiple layers of sealant on the inner and outer sides of the liquid-sealed gasket are heated and melt rapidly. The melted sealant forms multiple liquid slag films on the inlet and outlet sides, respectively, thus achieving a liquid seal.

[0038] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0039] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A liquid-sealed sprue sealing gasket, characterized in that, It includes a first sealing layer (1), a sealant filling port (2), a second sealing layer (3), and a sealant; The upper and lower ends of the second sealing layer (3) are respectively provided with a first sealing layer (1). The inner and outer sides of the first sealing layer (1) protrude from the second sealing layer (3). The inner and outer walls of the second sealing layer (3) are provided with sealant filling ports (2). The sealant filling ports (2) on the inner wall of the second sealing layer (3) and the sealant filling ports (2) on the outer wall of the second sealing layer (3) are staggered. The sealant filling ports (2) are filled with sealant.

2. The liquid-sealed nozzle sealing gasket according to claim 1, characterized in that, The first sealing layer (1) and the second sealing layer (3) are cylindrical structures.

3. The liquid-sealed nozzle sealing gasket according to claim 1, characterized in that, The first sealing layer (1) is a refractory material.

4. The liquid-sealed nozzle sealing gasket according to claim 3, characterized in that, The first sealing layer (1) is a neutral refractory material or a special refractory material.

5. The liquid-sealed nozzle sealing gasket according to claim 1, characterized in that, The second sealing layer (3) is made of ceramic fiber material.

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