Sealing structure of blast furnace top steel ring and airtight box

Abstract

The utility model discloses a sealing structure of a blast furnace top steel ring and an airtight box, and belongs to the technical field of blast furnace top steel ring sealing. Comprising a steel ring flange, an airtight box flange, a plurality of copper pipes and a plurality of sealing strips, the copper pipes and the sealing strips are annular and flatly laid on the steel ring flange, the airtight box flange is pressed on the copper pipes and the sealing strips, and the airtight box flange is connected with the steel ring flange through fasteners; the copper pipe and the sealing strip form a multi-layer annular structure, and the copper pipe at least forms an innermost layer ring and an outermost layer ring of the multi-layer annular structure. The technical problem that a sealing piece between a traditional blast furnace top steel ring and an airtight box is prone to hardening, poor in compressibility, embrittled and prone to damage under high temperature, humidity, high pressure and dust washing, and consequently blast furnace damping down and production reduction are caused by the fact that gas leakage is inconvenient to cut off rapidly and efficiently is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high furnace roof steel ring sealing technical field especially relates to a kind of sealing structure of high furnace roof steel ring and airtight box. BACKGROUND

[0002] The sealing element between the flange of traditional high furnace roof steel ring and airtight box has packing and asbestos rope, and the following problems exist when using this kind of sealing element: in the process of blast furnace production, due to the abnormal furnace condition, thermal expansion and contraction of furnace shell, furnace age enters middle and later period, etc., leading to the gap between the sealing element and the two flanges, and the sealing element becomes hard and brittle under the working condition (high temperature, humidity, high pressure, dust scouring) after coal gas leakage, and it is difficult to effectively handle the coal gas leakage fault by tightening the connecting piece of the two flanges, thereby leading to blast furnace blowdown and production reduction. Therefore, it is necessary to improve the sealing structure between the existing high furnace roof steel ring and airtight box, and when the gap between the flanges of the high furnace roof steel ring and the airtight box leads to high temperature and high pressure coal gas leakage in the furnace, the fastener of the two flanges can be appropriately tightened, so that the sealing element is tightly attached to the two flanges after being pressed, thereby effectively cutting off the coal gas leakage and expansion, and ensuring the stable operation of the blast furnace. SUMMARY

[0003] The purpose of the utility model is to provide a kind of sealing structure of high furnace roof steel ring and airtight box for the above problems, to solve the technical problem that the sealing element between the traditional high furnace roof steel ring and airtight box becomes hard and brittle under high temperature, humidity, high pressure and dust scouring, and it is not convenient to quickly and efficiently cut off the coal gas leakage, thereby leading to blast furnace blowdown and production reduction.

[0004] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0005] A kind of sealing structure of high furnace roof steel ring and airtight box, including steel ring flange, airtight box flange, several copper pipes and several sealing strips, the copper pipe, the sealing strip are annular and are laid on the steel ring flange, the airtight box flange is pressed on the copper pipe and the sealing strip, the airtight box flange is connected with the steel ring flange by the fastener;The copper pipe and the sealing strip form a multilayer ring structure, and the copper pipe forms at least the innermost layer ring and the outermost layer ring of the multilayer ring structure.

[0006] Further, it further includes sealing glue, and the sealing glue is filled in the closed space formed by the copper pipe, the sealing strip, steel ring flange and airtight box flange.

[0007] Further, the multilayer ring structure is formed by the copper pipe and the sealing strip.

[0008] Furthermore, the sealing strip has beveled cuts at both ends, and the sealing strip forms a ring shape after the beveled cuts are joined together.

[0009] Furthermore, the copper tube is made of a hollow tube, and the two ends of the hollow tube are welded to form a ring.

[0010] Furthermore, the sealing strip is made of elastic, high-temperature resistant silicone.

[0011] Furthermore, it also includes fine copper wires, which are wound around a multi-layered ring structure.

[0012] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model employs a multi-layered annular structure formed by copper pipes and sealing strips for sealing. The copper pipes possess excellent thermal conductivity and mechanical strength, maintaining stable sealing performance under harsh conditions of high temperature, humidity, high pressure, and dust erosion. The sealing strips are made of elastic, high-temperature resistant silicone, effectively filling tiny gaps between flange surfaces, significantly improving sealing performance and reliability, and preventing gas leakage. In the event of minor leaks after prolonged use, the gas leakage can be quickly and effectively addressed by tightening the fasteners on both flange surfaces. The sealing structure can be remade during production breaks, thus avoiding direct blast furnace shutdowns and production reductions. This invention solves the technical problem that traditional blast furnace top steel ring and gas-tight box seals are prone to hardening, poor compressibility, embrittlement, and breakage under high temperature, humidity, high pressure, and dust erosion, hindering the rapid and efficient cut-off of gas leaks and leading to blast furnace shutdowns and production reductions.

[0014] 2. This utility model uses high-temperature and corrosion-resistant copper pipes and high-temperature resistant silicone sealing strips, combined with sealant to fill the sealed space, so that the sealing structure can maintain a good sealing state for a long time under the harsh working conditions of the blast furnace top steel ring. This reduces the need to frequently replace sealing parts due to seal failure, thereby reducing maintenance costs and downtime, and improving the production efficiency and economic benefits of the blast furnace.

[0015] 3. The copper tube of this utility model has beveled ends and a ring structure is formed by copper welding, which further improves the strength and stability of the copper tube; the fine copper wire is wrapped around the outer circumference of the multi-layer ring structure, which strengthens the overall sealing structure and enables it to maintain its integrity when the furnace shell expands and contracts or is subjected to mechanical stress, effectively avoiding sealing failure caused by deformation. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention;

[0017] Figure 2 This utility model Figure 1 Enlarged view at point A;

[0018] In the attached diagram, 1-steel ring flange, 2-airtight box flange, 3-copper pipe, 4-sealing strip, 5-sealing adhesive, and 6-fastener. Detailed Implementation

[0019] The specific implementation of the utility model will be further described below with reference to the accompanying drawings.

[0020] In the description of this utility model, it should be understood that the terms "center", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] Please see Figure 1 and Figure 2 A sealing structure for a blast furnace top steel ring and an airtight box includes a steel ring flange 1, an airtight box flange 2, several copper pipes 3, and several sealing strips 4. The copper pipes 3 and the sealing strips 4 are both annular and laid flat on the steel ring flange 1. The airtight box flange 2 presses on the copper pipes 3 and the sealing strips 4. The airtight box flange 2 is connected to the steel ring flange 1 by fasteners 6. The copper pipes 3 and the sealing strips 4 form a multi-layer annular structure, and the copper pipes 3 form at least the innermost ring and the outermost ring of the multi-layer annular structure.

[0024] In this embodiment, a sealant 5 is also included, which fills the sealed space formed by the copper pipe 3, the sealing strip 4, the steel ring flange 1, and the airtight box flange 2.

[0025] In this embodiment, the multi-layered annular structure is formed by alternating copper tubes 3 and sealing strips 4. The sealing strips 4 are made of elastic, high-temperature resistant silicone. Specifically, the sealing strips 4 have beveled ends, and the sealing strips 4 form an annular shape after the beveled ends are joined together.

[0026] In this embodiment, the copper tube 3 is made of a hollow tube, and the two ends of the hollow tube are welded to form a ring.

[0027] In this embodiment, a fine copper wire is also included, which is wound around a multi-layered ring structure.

[0028] The installation process can be followed as follows:

[0029] ① Bend three hollow copper pipes 3 along the steel ring flange 1 on the furnace top. After the two ends of each copper pipe 3 are connected by copper welding, place them evenly on the flange surface. Fill the gaps between the copper pipes 3 with two rings of elastic high-temperature resistant silicone sealing strips 4 evenly and flatly, and the cut of the sealing strips 4 should be beveled.

[0030] ② Use thin copper wire to tie and fix the three hollow copper tubes 3 and the two sealing strips 4. Apply and spread high-temperature sealant 5 evenly on the cut of the silicone strip, the upper surface of the hollow copper tubes 3 and the elastic high-temperature resistant silicone sealing strip 4, and the gap between the hollow copper tubes 3 and the steel ring on both the inner and outer sides.

[0031] ③ Hoist the airtight box and tighten the two steel ring flanges 1 and the airtight box flange 2 diagonally with fasteners 6 to complete the installation.

[0032] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A sealing structure for a blast furnace top steel ring and an airtight box, characterized in that: The device includes a steel ring flange, an airtight box flange, several copper pipes, and several sealing strips. The copper pipes and sealing strips are both annular and laid flat on the steel ring flange. The airtight box flange presses on the copper pipes and sealing strips. The airtight box flange is connected to the steel ring flange by fasteners. The copper pipes and sealing strips form a multi-layer annular structure. The copper pipes form at least the innermost and outermost rings of the multi-layer annular structure.

2. The sealing structure of the blast furnace top steel ring and the airtight box according to claim 1, characterized in that: It also includes a sealant that fills the sealed space formed by the copper pipe, the sealing strip, the steel ring flange, and the airtight box flange.

3. The sealing structure of the blast furnace top steel ring and the airtight box according to claim 1, characterized in that: The multi-layered annular structure is formed by alternating copper tubes and sealing strips.

4. The sealing structure of the blast furnace top steel ring and the airtight box according to claim 1, characterized in that: The sealing strip has beveled cuts at both ends, and the sealing strip forms a ring shape when the beveled cuts are joined together.

5. The sealing structure of the blast furnace top steel ring and the airtight box according to claim 1, characterized in that: The copper tube is made of a hollow tube, and the two ends of the hollow tube are welded to form a ring.

6. The sealing structure of the blast furnace top steel ring and the airtight box according to claim 1, characterized in that: The sealing strip is made of elastic, high-temperature resistant silicone.

7. The sealing structure of the blast furnace top steel ring and the airtight box according to claim 1, characterized in that: It also includes fine copper wires, which are wound around a multi-layered ring structure.

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