CN216473317U - RH dip pipe with novel structure - Google Patents

Abstract

An RH dip pipe with a novel structure comprises: the steel courage, the steel courage be the circular tubular structure that the metal material constitutes, be equipped with the firebrick layer in its inside, be equipped with the pouring material layer that flows automatically between firebrick layer and steel courage, the steel courage outer wall is equipped with low melting material, the inboard adhesion of low melting material is at steel courage outer wall middle part, be equipped with outside pouring material layer in the low melting material outside, low melting material melts the vacuole formation under the high temperature effect, the cavity is in between steel courage and the outside pouring material layer, it is different because of the material inflation rate to make to avoid between outside pouring material layer and the steel courage, the mutual atress extrusion that leads to, still be equipped with multiunit anchor assembly on the steel courage outer wall, a drop for preventing outside pouring material layer. The beneficial structure can effectively avoid cracks and peeling of the casting material layer in the using process, and prolong the service life of the whole vacuum chamber; the operation is simple and convenient, and the low-melting material can be directly adhered to the steel liner; the structure of the dip pipe is not required to be changed, and the adaptability to the shape of a steel structure is strong; low cost and remarkable use effect.

Description

RH dip pipe with novel structure

Technical Field

The utility model relates to the field of RH refining system equipment, in particular to an RH dip pipe with a novel structure.

Background

RH system equipment is secondary refining process equipment for producing high-quality steel. The whole molten steel refining is carried out in a vacuum tank with a refractory lining. The lower part of the vacuum tank is provided with two immersion pipes with refractory linings, and the upper part is connected with a hot bent pipe.

Before the molten steel is treated, the dip pipe is immersed into the molten steel of the steel ladle to be treated. When the vacuum vessel is evacuated, the atmospheric pressure on the surface of the molten steel forces the molten steel to flow from the ascending-side dip pipe into the vacuum vessel. Two immersion pipes are communicated with the vacuum tank, one is an ascending pipe, and the other is a descending pipe. Because the ascending pipe continuously blows argon gas into the molten steel through the argon gas pipe, a higher static pressure difference is generated relative to the descending pipe without blowing argon gas, so that the molten steel enters from the ascending pipe and flows to the descending pipe through the lower part of the vacuum tank, and the process is continuously circulated and repeated. In a vacuum state, argon, hydrogen, carbon monoxide and other gases flowing through the vacuum channel steel water are pumped away in the molten steel circulation process. Meanwhile, the molten steel entering the vacuum tank also carries out a series of metallurgical reactions, such as carbon-oxygen reaction; the molten steel is purified by such circular degassing and refining.

The RH dip pipe is an important component of the whole molten steel refining system, the dip pipe comprises a peripheral castable layer and a middle steel liner, an inner ring is a refractory brick layer, the castable layer is used for protecting the steel liner and the refractory brick layer, and the state of the peripheral castable layer directly influences the service life of the whole refining system.

In the refining process, due to the fact that the materials are in a high-temperature state for a long time and different in expansion rate, the materials are mutually stressed and extruded, the refractory materials are prone to cracking, and the service life of the dip pipe is shortened.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide the RH dip pipe with the novel structure, wherein the low-melting material is arranged between the casting material layer and the steel liner, and is melted at high temperature in the using process, so that a cavity is left between the casting material layer and the steel liner, the mutual expansion stress among different materials is avoided, the cracks of the casting material layer are reduced, and the service life of the refractory material is prolonged.

In order to achieve the purpose, the utility model adopts the following technical scheme: an RH dip pipe with a novel structure comprises: the steel courage, the steel courage be the circular tubular structure that the metal material constitutes, be equipped with the firebrick layer in its inside, be equipped with the pouring material layer that flows automatically between firebrick layer and steel courage, the steel courage outer wall be equipped with low melting material, the inboard adhesion of low melting material be equipped with outside pouring material layer in steel courage outer wall middle part, be equipped with outside pouring material layer in the low melting material outside, low melting material melts under the high temperature effect and forms the cavity, the cavity be in between steel courage and the outside pouring material layer, make outside pouring material layer and steel courage between avoid because of the material expansion rate is different, the mutual atress extrusion that leads to, the steel courage outer wall on still be equipped with multiunit anchor assembly for prevent droing of outside pouring material layer.

The anchoring parts are uniformly fixed outside the steel liner in a welding mode, and reinforcing rib nets are arranged among the anchoring parts and used for increasing the contact area with an external pouring material layer.

The utility model has the beneficial effects that: the beneficial structure can effectively avoid cracks and peeling of the pouring material layer outside the dip pipe in the using process, and prolong the service life of the whole vacuum chamber; the operation is simple and convenient, and the adhesive can be directly adhered to the steel liner; the structure of the dip pipe is not required to be changed, and the adaptability to the shape of the steel structure is strong; low cost and remarkable use effect.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention.

In the figure: 1. the steel liner, 2, refractory brick layer, 3, self-flowing casting material layer, 4 low-melting material, 5, external casting material layer, 6, anchoring piece, 7 and reinforcing rib net.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the drawings in the specification, and it should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, an RH dipping tube with a novel structure includes: steel courage 1, steel courage 1 be the circular tubular structure that the metal material constitutes, be equipped with firebrick layer 2 in its inside, be equipped with the pouring material layer 3 that flows automatically between firebrick layer 2 and steel courage 1, should flow pouring material layer 3 that flows automatically is used for filling the gap between 1 inner wall of steel courage and the firebrick layer 2, 1 outer wall of steel courage be equipped with low melting material 4, low melting material 4 adhesion is equipped with outside pouring material layer 5 at 1 outer wall middle part of steel courage 1 and low melting material 4 outside, this outside pouring material layer 5 is used for protecting steel courage 1 and its inside firebrick layer 2, 1 outside of steel courage still be equipped with the anchoring member 6 that the multiunit is used for preventing outside pouring material layer 5 and drops. Low melting material 4 use EVA bubble cotton as the substrate, have water-fast, shockproof, characteristics that toughness is high, low melting material 4 contacts with outside pouring material layer 5 through adhesion on steel courage 1 outer wall, low melting material 4's thickness, according to the expansion ratio adjustment of steel courage 1 material and outside pouring material layer 5 material, low melting material 4 melts under the produced high temperature effect of refining in-process, the cavity that produces after low melting material 4 melts can make and avoid between outside pouring material layer 5 and the steel courage 1 because of the material expansion ratio is different, the mutual atress extrusion that leads to. Anchoring parts 6 are uniformly fixed on the outer wall of the steel liner 1 in a welding mode, and reinforcing rib nets 7 are arranged between the anchoring parts 6 and used for increasing the contact area of the external casting material layer 5, so that a good effect is achieved on material falling prevention.

The utility model is improved on the basis of the original dip pipe, the thickness of the needed low-melting material 4 is obtained by the expansion rate of the material of the steel liner 1 and the expansion rate of the material of the external casting material layer 5, then the low-melting material 4 taking EVA foam as the base material is wound on the outer wall of the steel liner 1, the low-melting material 4 is adhered on the outer wall of the steel liner 1 until the thickness reaches the standard, the casting material is refilled after the low-melting material 4 is arranged, the external casting material layer 5 is formed by solidification, the low-melting material 4 is melted by high temperature generated in the refining process during use, a cavity is formed between the external casting material layer 5 and the steel liner 1 after the low-melting material 4 is melted, the cavity can prevent the external casting material layer 5 from directly contacting the steel liner 1, so that the mutual stress extrusion caused by different material expansion rates is avoided, and the service life of the refractory is prolonged.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

The present invention is not described in detail in the prior art.

Claims (2)

1. An RH dip pipe with a novel structure comprises: steel courage (1), characterized by: the steel liner (1) is a round tubular structure made of metal materials, a refractory brick layer (2) is arranged in the steel liner, a self-flowing castable layer (3) is arranged between the refractory brick layer (2) and the steel liner (1), the outer wall of the steel liner (1) is provided with a low-melting material (4), the inner side of the low-melting material (4) is adhered to the middle part of the outer wall of the steel liner (1), an external castable layer (5) is arranged on the outer side of the low-melting material (4), the low-melting material (4) is melted under the action of high temperature to form a cavity, the cavity is positioned between the steel liner (1) and the outer castable layer (5), so that the outer castable layer (5) and the steel liner (1) are prevented from being stressed and extruded mutually due to different expansion rates of materials, the outer wall of the steel liner (1) is also provided with a plurality of groups of anchoring pieces (6) for preventing the outer casting material layer (5) from falling off.

2. The RH dip pipe with a new structure as claimed in claim 1, wherein: the anchoring pieces (6) are uniformly fixed outside the steel liner (1) in a welding mode, and reinforcing rib nets (7) are arranged between the anchoring pieces (6) and used for increasing the contact area with an external castable layer (5).

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