Novel mechanism for composite upper nozzle

Abstract

The utility model discloses a novel mechanism for a composite upper nozzle, which comprises a plate-shaped part, and on the longitudinal section along the axis of the plate-shaped part, the radial distance between the peripheral surface of the plate-shaped part along the circumferential direction and the axis of the plate-shaped part is gradually reduced from the middle to the two ends. The protection mechanism layer is installed on the outer layer of the plate-shaped part, cracks generated by expansion of refractory materials of the plate-shaped part in the heated state are reduced, the use performance of the refractory materials is enhanced, the exterior of the plate-shaped part is protected by the protection mechanism layer, the anti-seismic performance of the sliding face of the plate-shaped part is improved, and cracking of the sliding face is effectively avoided; the protection mechanism layer with the V-shaped groove is matched, axial and radial positioning can be provided, meanwhile, the contact area is increased, and the stable connection performance of the protection mechanism layer and the plate-shaped part is kept all the time; and the protection mechanism layer adopts two symmetrical groove surfaces to press the plate-shaped part, and uniform pressing force is provided in the circumferential direction, so that the cracking of the plate-shaped part is avoided to the greatest extent.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical refractory materials, and more specifically to a novel composite water inlet mechanism. Background Art

[0002] The steel industry is a basic industry in my country and plays an important role in the national economy. Steel production is carried out under high temperature conditions and refractory materials are essential to achieve this. The three major parts, namely the long nozzle, the submerged upper nozzle, the submerged lower nozzle, and the stopper rod, are important functional refractory materials for steel smelting and serve as a molten metal transfer channel; the upper nozzle is used between the tundish and the crystallizer to guide the molten steel from the tundish to the crystallizer, and is also used in conjunction with the stopper rod to control the flow and the submerged nozzle to prevent hydrogen and nitrogen absorption and avoid secondary oxidation. The commonly used upper nozzle has its inner hole in direct contact with the molten steel when in use. The external refractory material of the upper nozzle is subjected to severe temperature fluctuations and is prone to cracking, especially the upper nozzle plate position has a high accident rate. Once an accident occurs, it leads to oxidation of the molten steel and other accidents, and even the tundish needs to be replaced, which affects the continuity of steel plant production and significantly increases steelmaking costs. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to provide a new type of composite water inlet mechanism which can prevent cracking and has low cost.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a new type of composite water inlet mechanism, including a plate-like portion, in the longitudinal section along the axis of the plate-like portion: the radial distance between the outer peripheral surface of the plate-like portion along the circumferential direction and the axis of the plate-like portion gradually decreases from the middle to the two ends.

[0005] The above-mentioned new type of composite water inlet mechanism has the following characteristics: in the longitudinal section along the axis of the plate-like part: the radial distance from the outer peripheral surface to the axis gradually decreases from the midpoint of the outer peripheral surface to the two ends of the outer peripheral surface, and the midpoint is the position point on the outer peripheral surface where the axial distance from the middle to either end of the outer peripheral surface is equal.

[0006] The above-mentioned novel composite water inlet mechanism has a V-shaped outer peripheral surface in a longitudinal section along the axis of the plate-like portion.

[0007] The above-mentioned novel composite water inlet mechanism comprises a first annular surface extending from the midpoint of the outer circumference to one end of the outer circumference, and a second annular surface extending from the midpoint of the outer circumference to the other end of the outer circumference. The first annular surface and the second annular surface are symmetrically arranged with respect to a plane passing through the midpoint and perpendicular to the axis, and an angle a between the first annular surface and the second annular surface is 105°-110°.

[0008] In the above-mentioned novel composite water inlet mechanism, a protective mechanism layer is sleeved on the outer peripheral surface of the plate-like portion, and the inner annular surface of the protective mechanism layer matches the shape of the outer peripheral surface and fits tightly.

[0009] In the above-mentioned novel composite water inlet mechanism, a tubular portion is connected to or integrally formed on the plate-like portion, a flow steel channel is opened in the tubular portion, and one end of the flow steel channel is sealed and connected to a plate surface of the plate-like portion.

[0010] The above-mentioned new type of composite water inlet mechanism, the two end faces of the protection mechanism layer are flush with the two plate surfaces of the plate-like part, and the axial thickness of the protection mechanism layer is 40mm; a V-shaped groove is provided on the inner annular surface of the protection mechanism layer, and the distance from the bottom of the V-shaped groove to the outer annular surface of the protection mechanism layer is 25mm, and the distance from the top of the V-shaped groove to the outer annular surface of the protection mechanism layer is 35mm; the outer peripheral surface is tightly fitted in the V-shaped groove.

[0011] The above-mentioned novel composite water inlet mechanism, the protective mechanism layer includes a first half ring and a second half ring fixedly connected by locking bolts, the inner diameter of the first half ring gradually decreases from one end close to the second half ring to one end away from the second half ring, and the inner diameter of the second half ring gradually decreases from one end close to the first half ring to one end away from the first half ring.

[0012] In the novel composite water inlet mechanism, a permeable layer is arranged in the steel flow channel of the tubular part, an air channel is opened in the tubular part, the air inlet end of the air channel penetrates the outer wall of the tubular part, the air outlet end of the air channel penetrates the sliding surface of the plate-like part, and the air channel is in fluid communication with the permeable layer through a branch air channel. By supplying air to the permeable layer, non-metallic oxides in the molten steel are prevented from adhering to the wall of the steel flow channel and forming nodules.

[0013] In the above-mentioned novel composite water inlet mechanism, a blowing annular groove is coaxially provided on the sliding surface of the plate-like portion, and the air outlet end of the air passage is fluidically connected to the blowing annular groove.

[0014] The technical solution of the utility model has achieved the following beneficial technical effects:

[0015] 1. By installing a protective mechanism layer on the outer layer of the plate-like part, the expansion of the plate-like refractory material under heat and the generation of cracks are reduced, and the performance of the refractory material is enhanced. The outside of the plate-like part is protected by the protective mechanism layer, which improves the seismic resistance of the sliding surface of the plate-like part and effectively avoids cracking of the sliding surface. The accident rate is reduced from the original 0.5% to 0.1%, and the accident rate is reduced by 80%, which is a significant reduction.

[0016] 2. By setting the outer circumferential surface of the plate-like part to a V-shape and cooperating with a protective mechanism layer with a V-shaped groove, axial and radial positioning can be provided, and at the same time the contact area is increased, so that the protective mechanism layer always maintains a stable connection performance with the plate-like part; the protective mechanism layer uses two symmetrical groove surfaces to press the plate-like part, providing uniform pressing force in the circumferential direction, thereby avoiding cracking of the plate-like part to the greatest extent.

[0017] 3. By setting up a protective mechanism layer composed of a first half ring and a second half ring, the two half rings can be gradually brought closer under the compression of the locking bolt, so that the outer peripheral surface of the plate-like part is gradually compressed by utilizing the inclined first ring surface and the second ring surface, which not only provides a uniform compression force to the plate-like part, but also can provide sufficient compression force.

[0018] 4. Although the use of the protective mechanism layer will increase costs, the protective mechanism layer can be reused and can reduce the accident rate, thereby significantly reducing accident losses, which greatly reduces production costs and production losses for customers and steel mills. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the longitudinal cross-sectional structure of the utility model;

[0020] Figure 2 A schematic diagram of the structure of the first annular surface and the second annular surface in the longitudinal section of the utility model;

[0021] Figure 3 A schematic diagram of the longitudinal section structure of the protective mechanism layer of the utility model.

[0022] The reference numerals in the figure are indicated as follows: 1-plate-like portion; 2-outer peripheral surface; 3-axis line; 4-midpoint; 5-first annular surface; 6-second annular surface; 7-tubular portion; 8-flow steel channel; 9-V-shaped groove; 10-first half ring; 11-second half ring; 12-locking bolt; 13-air channel; 14-blowing ring groove; 15-protective mechanism layer; 16-breathable layer. DETAILED DESCRIPTION

[0023] A new type of composite water inlet mechanism in this embodiment is shown in FIG. Figure 1-2, comprising a plate-like portion 1, the plate-like portion 1 is connected to or integrally formed with a tubular portion 7, a steel flow channel 8 is provided in the tubular portion 7, one end of the steel flow channel 8 is sealed and connected to a plate surface of the plate-like portion 1, a breathable layer 16 is provided in the steel flow channel 8 of the tubular portion 7, an air channel 13 is provided in the tubular portion 7, the air inlet end of the air channel 13 penetrates the outer wall surface of the tubular portion 7, the air outlet end of the air channel 13 penetrates the sliding surface of the plate-like portion 1, the air channel 13 is fluidly connected with the breathable layer 16 through a branch air channel, and air is supplied to the breathable layer to prevent non-metallic oxides in the molten steel from adhering to the wall of the steel flow channel and forming nodules A blowing annular groove 14 is coaxially provided on the sliding surface of the plate-like portion 1, and the outlet end of the air channel 13 is fluidly connected to the blowing annular groove 14. On the longitudinal section along the axis 3 of the plate-like portion 1: the radial distance between the outer peripheral surface 2 of the plate-like portion 1 in the circumferential direction and the axis 3 of the plate-like portion 1 gradually decreases from the middle to both ends, and the radial distance between the outer peripheral surface 2 and the axis 3 gradually decreases from the midpoint 4 of the outer peripheral surface 2 to the two ends of the outer peripheral surface 2, that is, the middle of the outer peripheral surface 2 of the plate-like portion 1 extends away from the direction perpendicular to the axis 3, and the midpoint 4 is a position point where the axial distance from the middle of the outer peripheral surface 2 to either end of the outer peripheral surface 2 is equal.

[0024] like Figure 2 As shown, in the longitudinal section along the axis 3 of the plate-like portion 1: the shape of the outer peripheral surface 2 is V-shaped, the surface of the outer peripheral surface 2 from the midpoint 4 to one end of the outer peripheral surface 2 is a first annular surface 5, and the surface of the outer peripheral surface 2 from the midpoint 4 to the other end of the outer peripheral surface 2 is a second annular surface 6, the first annular surface 5 and the second annular surface 6 are symmetrically arranged about a plane passing through the midpoint 4 and perpendicular to the axis 3, and the angle a between the first annular surface 5 and the second annular surface 6 is 108°. By setting the outer peripheral surface of the plate-like portion 1 to a V-shape, it is convenient to match and connect with the protective mechanism layer 15, and axial and radial positioning can be achieved. At the same time, the contact area is increased, so that the protective mechanism layer 15 always maintains a stable connection performance with the plate-like portion 1.

[0025] like Figure 1 As shown, a protective mechanism layer 15 is sleeved on the outer peripheral surface 2 of the plate-like portion 1, and the inner annular surface of the protective mechanism layer 15 matches the shape of the outer peripheral surface 2 and fits tightly. By installing the protective mechanism layer 15 on the outer layer of the plate-like portion 1, the expansion of the refractory material of the plate-like portion 1 under heating and the generation of cracks are reduced, thereby enhancing the performance of the refractory material. The outside of the plate-like portion 1 is protected by the protective mechanism layer 15, thereby improving the seismic resistance of the sliding surface of the plate-like portion 1 and effectively avoiding cracking of the sliding surface. The accident rate is reduced from the original 0.5% to 0.1%, and the accident rate is reduced by 80%, which is a significant reduction.

[0026] like Figure 1 , Figure 3As shown, the two end faces of the protective mechanism layer 15 are flush with the two plate surfaces of the plate-like portion 1, and the axial thickness of the protective mechanism layer 15 is 40 mm; a V-shaped groove 9 is provided on the inner annular surface of the protective mechanism layer 15, and the distance from the bottom of the V-shaped groove 9 to the outer annular surface of the protective mechanism layer 15 is 25 mm, and the distance from the top of the V-shaped groove 9 to the outer annular surface of the protective mechanism layer 15 is 35 mm; the outer peripheral surface 2 fits tightly in the V-shaped groove 9, and the protective mechanism layer 15 uses two symmetrical groove surfaces to press the plate-like portion 1, providing uniform pressing force in the circumferential direction, thereby avoiding cracking of the plate-like portion 1 to the greatest extent.

[0027] like Figure 3 As shown, the protection mechanism layer 15 includes a first half ring 10 and a second half ring 11 fixedly connected by a locking bolt 12, the inner diameter of the first half ring 10 gradually decreases from an end close to the second half ring 11 to an end away from the second half ring 11, and the inner diameter of the second half ring 11 gradually decreases from an end close to the first half ring 10 to an end away from the first half ring 10. By setting the protection mechanism layer 15 composed of the first half ring 10 and the second half ring 11, under the pressing action of the locking bolt 12, the two half rings can be gradually approached, so that the outer peripheral surface 2 of the plate-like portion 1 is gradually pressed by the inclined first annular surface 5 and the second annular surface 6, which not only provides a uniform pressing force to the plate-like portion 1, but also can provide sufficient pressing force.

[0028] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A novel composite water inlet mechanism, comprising a plate-shaped portion (1), characterized in that: In a longitudinal section along the axis (3) of the plate-like portion (1): the radial distance between the outer peripheral surface (2) of the plate-like portion (1) along the circumferential direction and the axis (3) of the plate-like portion (1) gradually decreases from the middle to both ends.

2. A novel composite water inlet mechanism according to claim 1, characterized in that: In a longitudinal section along the axis (3) of the plate-like portion (1): the radial distance from the outer peripheral surface (2) to the axis (3) gradually decreases from the midpoint (4) of the outer peripheral surface (2) to the two ends of the outer peripheral surface (2), and the midpoint (4) is a point on the outer peripheral surface (2) where the axial distance from the middle to either end of the outer peripheral surface (2) is equal.

3. A novel composite water inlet mechanism according to claim 2, characterized in that: In a longitudinal section along the axis (3) of the plate-like portion (1), the shape of the outer peripheral surface (2) is V-shaped.

4. A novel composite water inlet mechanism according to claim 3, characterized in that: The surface of the outer peripheral surface (2) from the midpoint (4) to one end of the outer peripheral surface (2) is a first annular surface (5), and the surface of the outer peripheral surface (2) from the midpoint (4) to the other end of the outer peripheral surface (2) is a second annular surface (6), the first annular surface (5) and the second annular surface (6) are symmetrically arranged about a plane passing through the midpoint (4) and perpendicular to the axis (3), and an angle a between the first annular surface (5) and the second annular surface (6) is 105°-110°.

5. A novel composite water inlet mechanism according to any one of claims 1 to 4, characterized in that: A protective mechanism layer (15) is sleeved on the outer peripheral surface (2) of the plate-shaped portion (1), and the inner annular surface of the protective mechanism layer (15) matches the shape of the outer peripheral surface (2) and fits tightly.

6. A novel composite water inlet mechanism according to claim 5, characterized in that: The plate-like portion (1) is connected to or integrally formed with a tubular portion (7), a steel flow channel (8) is provided in the tubular portion (7), and one end of the steel flow channel (8) is sealedly connected to a plate surface of the plate-like portion (1).

7. A novel composite water inlet mechanism according to claim 5, characterized in that: The two end faces of the protective mechanism layer (15) are flush with the two plate surfaces of the plate-like portion (1), and the axial thickness of the protective mechanism layer (15) is 40 mm; a V-shaped groove (9) is provided on the inner annular surface of the protective mechanism layer (15), and the distance from the bottom of the V-shaped groove (9) to the outer annular surface of the protective mechanism layer (15) is 25 mm, and the distance from the top of the V-shaped groove (9) to the outer annular surface of the protective mechanism layer (15) is 35 mm; the outer peripheral surface (2) is tightly fitted in the V-shaped groove (9).

8. The novel composite water inlet mechanism according to claim 5, characterized in that: The protective mechanism layer (15) comprises a first half ring (10) and a second half ring (11) which are fixedly connected by a locking bolt (12); the inner diameter of the first half ring (10) gradually decreases from an end close to the second half ring (11) to an end away from the second half ring (11); and the inner diameter of the second half ring (11) gradually decreases from an end close to the first half ring (10) to an end away from the first half ring (10).

9. A novel composite water inlet mechanism according to claim 6, characterized in that: A breathable layer (16) is arranged in the flow steel channel (8) of the tubular portion (7), and an air channel (13) is opened in the tubular portion (7). The air inlet end of the air channel (13) passes through the outer wall surface of the tubular portion (7), and the air outlet end of the air channel (13) passes through the sliding surface of the plate-like portion (1). The air channel (13) is fluidically connected to the breathable layer (16) through a branch air channel.

10. A novel composite water inlet mechanism according to claim 9, characterized in that: An air blowing annular groove (14) is coaxially provided on the sliding surface of the plate-like portion (1), and the air outlet end of the air channel (13) is fluidically connected to the air blowing annular groove (14).

Images