Framework type flexible chute

Abstract

The invention mainly relates to the technical field of chutes, in particular to a framework type flexible chute which is of a tubular structure and comprises a corrugated pipe, fiber cloth and a ceramic assembly are sequentially arranged on the inner wall of the corrugated pipe in the depth direction of the corrugated pipe, and the ceramic assembly is formed by connecting a plurality of ceramic rings end to end. A flexible powder material is filled between the fiber cloth and the ceramic assembly and used for heat preservation and sealing, the corrugated pipe, the fiber cloth and the ceramic assembly are equal in length, the two ends of the framework type flexible chute are connected with the flanges, and the framework type flexible chute is connected with other equipment through the flanges. By means of the flexible chute structure in the technical scheme, the position of the molten aluminum outlet can be changed at any time when molten aluminum is conveyed, and the flexible chute structure is suitable for more use scenes.

Description

Technical Field

[0001] This invention relates to the field of chute technology, specifically a skeleton-type flexible chute. Background Technology

[0002] In the molten metal conveying process of the metallurgical casting industry, chutes are key equipment to ensure continuous production. Currently, the most widely used type of chute in the industry is the rigid chute, which mainly consists of a metal shell and a sintered lining as its main structural design, with insulation material filling the space between the metal shell and the sintered lining. Once installed, the rigid chute remains in a fixed position and cannot be adjusted or moved. Furthermore, rigid chutes impose strict limitations on the molten metal conveying state—the molten metal must flow smoothly within the rigid chute, and large fluctuations in the liquid surface are not allowed. Otherwise, the oxide scale on the surface of the molten metal will crack, and the resulting oxide scale fragments will mix into the molten metal, forming "slag." Simultaneously, the air that was originally isolated by the oxide scale will directly invade the interior of the molten metal, forming microbubbles. Ultimately, this leads to defects such as porosity, slag inclusions, and looseness in the castings, severely reducing the mechanical properties and density of the product.

[0003] Therefore, there is an urgent need for a skeleton-type flexible chute to solve the above problems. Summary of the Invention

[0004] To achieve the above objectives, this application employs the following technical solution: A skeleton-type flexible chute is a tubular structure comprising a corrugated pipe. Fiber cloth and ceramic components are sequentially arranged along the depth direction of the inner wall of the corrugated pipe. Each ceramic component consists of several ceramic rings connected end-to-end. Flexible powder material is filled between the fiber cloth and the ceramic components for insulation and sealing. The corrugated pipe, fiber cloth, and ceramic components are of equal length. Both ends of the skeleton-type flexible chute are connected to flanges for connection to other equipment.

[0005] Furthermore, the ceramic ring is a hollow trapezoidal frustum structure with a preset wall thickness, including a first part and a second part. The first part is located in the upper section, and the second part is located in the lower section. The wall thickness of the first part is less than the wall thickness of the second part. The first cavity of the first part is a cylindrical structure, and the second cavity of the second part is a trapezoidal frustum structure, and the generatrix of its cross-section is parallel to the generatrix of the cross-section of the ceramic ring.

[0006] Furthermore, several ceramic rings are connected end to end to form the ceramic assembly, that is, the first part of the ceramic ring is installed on the second part of another ceramic ring, and the outer wall of the first part installation position is provided with an annular protrusion, and the inner wall of the second part mating position is provided with a groove, and the protrusion and the groove are mated to achieve a seal.

[0007] Furthermore, the outer wall of the first part and the inner wall of the second part are sprayed with a flexible sealing coating of 0.05-0.1 mm, the sealing coating being prepared of 60-70% boron nitride and 30-40% polyimide resin.

[0008] Furthermore, the fiber cloth includes an inner layer and an outer layer. The inner layer is made of a blend of 200-mesh ultrafine basalt fiber and aramid fiber, and the outer layer is made of a composite of carbon fiber woven cloth and glass fiber nonwoven cloth and is bonded to the corrugated pipe.

[0009] Furthermore, the flexible powder material has a three-layer composite structure, consisting of a seepage-proof layer, a heat-insulating layer, and a buffer layer, arranged sequentially from the central axis of the skeleton-type flexible chute to its outer wall. The impermeable layer comprises 50-60% hollow alumina microspheres, 15-20% modified silicone resin, 5-10% nano boron nitride powder, and 10-15% expanded vermiculite. The insulation layer comprises 40-50% silica aerogel, 30-40% hollow glass microspheres, and 10-20% chopped glass fiber cotton. The buffer comprises 30-40% aramid fiber chopped strands, 20-30% polytetrafluoroethylene emulsion, and 30-40% light calcium carbonate.

[0010] Furthermore, the thickness of the flexible powder material is 60-100 mm.

[0011] Compared with the prior art, the beneficial effects of this application are: The technical solution in this application utilizes a high-strength corrugated pipe as support, and the design of several ceramic rings and flexible powder material allows for flexible movement, thus accommodating changes in the position of the molten metal receiving port. Simultaneously, the flexible powder material has a three-layer composite structure, with an outer layer wrapped in fiber cloth, further enhancing the sealing performance of the skeleton-type flexible chute. During the transport of the molten metal in the skeleton-type flexible chute, it does not come into contact with the external environment, avoiding issues such as air intake or slag formation during molten metal transport, thereby ensuring the quality of the molten metal. Attached Figure Description

[0012] Appendix Figure 1 This is a cross-sectional view of the skeleton-type flexible chute in this application; Appendix Figure 2 This is a test diagram of the skeleton-type flexible chute in this application; Appendix Figure 3 This is a schematic diagram of the connection between the ceramic rings in this application; Appendix Figure 4 This is a partial enlarged view of the ceramic ring in this application.

[0013] The reference numerals in the attached diagram are: 1. Ceramic component; 11. Ceramic ring; 12. Protrusion; 13. Groove; 14. First part; 15. Second part; 2. Fiber cloth; 3. Bellows; 4. Flange. Detailed Implementation

[0014] The present application will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this application, those skilled in the art can make various alterations or modifications to this application, and these equivalent forms also fall within the scope defined by this application.

[0015] Combined with appendix Figure 1 Appendix Figure 2 As shown, a skeleton-type flexible chute is disclosed. The chute has a tubular structure, including a corrugated pipe 3, which acts as a skeleton to support the entire flexible chute. Fiber cloth 2 and ceramic components 1 are sequentially arranged along the depth direction of the inner wall of the corrugated pipe 3. The ceramic component 1 is composed of several ceramic rings 11 connected end-to-end. Flexible powder material is filled between the fiber cloth 2 and the ceramic component 1 for insulation and sealing. The corrugated pipe 3, fiber cloth 2, and ceramic component 1 are of equal length. Both ends of the skeleton-type flexible chute are connected to flanges 4, which connect it to other equipment. In this application, the corrugated pipe 3 serves as a support, and in conjunction with the ceramic component 1 and flexible powder, the skeleton-type flexible chute can move flexibly, allowing for changes in the position of the molten metal receiving port during actual operation.

[0016] As attached Figure 3 and attached Figure 4 As shown, the ceramic ring 11 is a hollow trapezoidal frustum structure with a preset wall thickness, including a first part 14 and a second part 15. The first part 14 is located in the upper section, and the second part 15 is located in the lower section. The wall thickness of the first part 14 is less than the wall thickness of the second part 15. The first cavity of the first part 14 is a cylindrical structure. When several ceramic rings 11 are connected, the structure of the first cavity can make the flow of molten metal smoother, reduce flow resistance and local eddies, and thus reduce the risk of oxide scale cracking on the surface of molten metal. The second cavity of the second part 15 is a trapezoidal frustum structure, and the generatrix of its cross-section is parallel to the generatrix of the cross-section of the ceramic ring 11, so as to enhance the stability of any two ceramic rings 11 connected together.

[0017] In some preferred embodiments of this application, a plurality of ceramic rings 11 are connected end to end to form the ceramic assembly 1, that is, the first part 14 of the ceramic ring 11 is installed on the second part 15 of another ceramic ring 11, and the outer wall of the first part 14 is provided with an annular protrusion 12, and the inner wall of the second part 15 is provided with a groove 13. The protrusion 12 and the groove 13 cooperate to improve the sealing performance between any two ceramic rings 11 and prevent the leakage of molten metal. At the same time, the structural design of the protrusion 12 and the groove 13 enables accurate positioning during connection and also allows for slight relative movement between the ceramic rings 11 to adapt to the flexible movement of the skeleton flexible chute.

[0018] The outer wall of the first part 14 and the inner wall of the second part 15 are sprayed with a flexible sealing coating of 0.05-0.1mm. The sealing coating is prepared of 60-70% boron nitride and 30-40% polyimide resin. The boron nitride enables the flexible sealing coating to have high temperature resistance, and the polyimide resin has a certain degree of flexibility, which can prevent cracks caused by flexible movement.

[0019] The fiber cloth 2 comprises an inner layer and an outer layer. The inner layer is in contact with the flexible powder material, and the outer layer is bonded to the corrugated pipe 3. The inner layer is made of a blend of 200-mesh ultrafine basalt fiber and aramid fiber to prevent the loss of particles from the flexible powder material. The basalt fiber also provides the inner layer with high-temperature resistance. The outer layer is a composite of carbon fiber woven fabric and glass fiber nonwoven fabric. When the skeleton-type flexible chute moves, the corrugated pipe 3 contacts and rubs against the outer layer. The carbon fiber woven fabric has high wear resistance and can more effectively protect the internal flexible powder material.

[0020] The flexible powder material has a three-layer composite structure with a thickness of 60-100mm. From the central axis of the flexible chute to its outer wall, the layers are a seepage-proof layer, a heat-insulating layer, and a buffer layer. The impermeable layer comprises 50-60% hollow alumina microspheres, 15-20% modified silicone resin, 5-10% nano boron nitride powder, and 10-15% expanded vermiculite. The expanded vermiculite can expand by 150-200% at high temperatures, actively filling gaps created by flexible movement at the connection between any two ceramic rings 11, achieving active sealing. The thermal insulation layer comprises 40-50% silica aerogel, 30-40% hollow glass microspheres, and 10-20% chopped glass fiber cotton. The buffer comprises 30-40% aramid fiber chopped yarn, 20-30% polytetrafluoroethylene emulsion, and 30-40% light calcium carbonate. The light calcium carbonate reduces the density of the buffer layer, ensuring that the flexible powder material does not crack or detach during flexible movement, thus improving the integrity of the overall structure.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A skeleton-type flexible chute, characterized in that: The skeleton-type flexible chute is a tubular structure, including a corrugated pipe (3). The inner wall of the corrugated pipe (3) is sequentially provided with fiber cloth (2) and ceramic components (1) along its depth direction. The ceramic components (1) are composed of several ceramic rings (11) connected end to end. Flexible powder material is filled between the fiber cloth (2) and the ceramic components (1) for heat preservation and sealing. The corrugated pipe (3), fiber cloth (2) and ceramic components (1) are of equal length. The two ends of the skeleton-type flexible chute are connected to flanges (4) and connected to other equipment through the flanges (4).

2. The skeleton-type flexible chute according to claim 1, characterized in that: The ceramic ring (11) is a hollow trapezoidal frustum structure with a preset wall thickness, including a first part (14) and a second part (15). The first part (14) is located in the upper section, and the second part (15) is located in the lower section. The wall thickness of the first part (14) is less than the wall thickness of the second part (15). The first cavity of the first part (14) is a cylindrical structure, and the second cavity of the second part (15) is a trapezoidal frustum structure, and the generatrix of its cross-section is parallel to the generatrix of the cross-section of the ceramic ring (11).

3. The skeleton-type flexible chute according to claim 1, characterized in that: Several ceramic rings (11) are connected end to end to form the ceramic assembly (1), that is, the first part (14) of the ceramic ring (11) is installed on the second part (15) of another ceramic ring (11), and the outer wall of the first part (14) is provided with an annular protrusion (12), and the inner wall of the second part (15) is provided with a groove (13) at the mating position. The protrusion (12) and the groove (13) cooperate to achieve a seal.

4. The skeleton-type flexible chute according to claim 3, characterized in that: The outer wall of the first part (14) and the inner wall of the second part (15) are sprayed with a flexible sealing coating of 0.05-0.1 mm, the sealing coating being prepared of 60-70% boron nitride and 30-40% polyimide resin.

5. The skeleton-type flexible chute according to claim 1, characterized in that: The fiber cloth (2) includes an inner layer and an outer layer. The inner layer is made of a blend of 200-mesh ultrafine basalt fiber and aramid fiber. The outer layer is made of a composite of carbon fiber woven cloth and glass fiber nonwoven cloth and is attached to the corrugated pipe (3).

6. The skeleton-type flexible chute according to claim 1, characterized in that: The flexible powder material has a three-layer composite structure, consisting of a seepage-proof layer, a heat-insulating layer, and a buffer layer, arranged sequentially from the central axis of the skeleton-type flexible chute to its outer wall. The impermeable layer comprises 50-60% hollow alumina microspheres, 15-20% modified silicone resin, 5-10% nano boron nitride powder, and 10-15% expanded vermiculite. The insulation layer comprises 40-50% silica aerogel, 30-40% hollow glass microspheres, and 10-20% chopped glass fiber cotton. The buffer comprises 30-40% aramid fiber chopped strands, 20-30% polytetrafluoroethylene emulsion, and 30-40% light calcium carbonate.

7. The skeleton-type flexible chute according to claim 1, characterized in that: The thickness of the flexible powder material is 60-100 mm.

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