Cover structure of a molten aluminum transfer ladle

Abstract

The utility model belongs to aluminium alloy melting and casting technical field relates to a molten aluminum transfer ladle cover structure. The structure includes the ladle cover body, the conical frustum boss which extends downward from the lower surface and the outer diameter is less than the inner diameter of the ladle mouth, and the annular rock wool which is only placed on the top surface of the ladle mouth, the lower end of the boss keeps the distance with the ladle bottom after inserting the ladle mouth, and the annular rock wool is compressed between the ladle cover and the ladle mouth. Compared with the whole rock wool, the utility model saves about 70% rock wool usage, and reduces the cost, the conical frustum and the ladle mouth form the wide upper narrow lower gap, the aluminum liquid upwelling is buffered, the splash leakage is prevented, and the safety and the maintenance convenience are improved obviously.

Description

Technical Field

[0001] This utility model belongs to the field of aluminum alloy melting and casting technology, and in particular to an aluminum liquid transfer cover structure. Background Technology

[0002] In aluminum alloy casting production lines, molten aluminum typically needs to be transferred between the melting furnace and the casting station under insulation. The molten aluminum transfer ladle is usually equipped with a lid to prevent heat loss and leakage. Rock wool is typically filled between the lid and the ladle opening as insulation and sealing material to prevent leakage and splashing.

[0003] However, in existing technologies, the cover structure is usually a simple flat structure, with a relatively large gap between the cover and the opening. To ensure a good seal, it is usually necessary to place a whole piece of round rock wool 50 (e.g., Figure 1 (As shown). This structure has the following problems: (1) Rock wool is used in large quantities and has high cost; (2) When the rock wool is not filled evenly or is not compressed enough, the sealing effect is poor, and the aluminum liquid is prone to leakage or splashing, which poses a safety hazard. (3) Rock wool needs to be replaced frequently, which increases labor costs and material waste.

[0004] Therefore, how to reduce the amount of rock wool used, lower production costs, and improve sealing safety has become a pressing technical problem to be solved in this field. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an aluminum liquid transfer cover structure to solve the problems of large rock wool usage, high cost and poor sealing safety in the prior art.

[0006] The technical solution adopted by this utility model to solve the technical problem is: This utility model provides an aluminum liquid transfer cover structure, including: cover body; A protrusion extending downward from the lower surface of the bag cover body has an outer diameter smaller than the inner diameter of the bag opening, so that it can be inserted into the bag opening; The ring-shaped rock wool is placed on the top surface of the bag opening, located between the lower surface of the bag cover body and the top surface of the bag opening. The inner diameter of the ring-shaped rock wool is larger than the outer diameter of the boss, and the outer diameter is smaller than or equal to the outer diameter of the bag opening. The lower end of the protrusion extends into the bag opening, and a certain distance is maintained between the lower end face of the protrusion and the bottom face of the bag opening.

[0007] Furthermore, the protrusion is an inverted truncated cone, with its large end connected to the lower surface of the cover body and its small end extending downward into the bag opening. The outer wall of the truncated cone forms a downward-contracting conical surface, creating an annular gap that is wider at the top and narrower at the bottom between it and the inner wall of the bag opening.

[0008] Furthermore, the thickness of the annular rock wool is 5 mm to 20 mm.

[0009] Furthermore, the boss is integrally formed with the cover body, and the lower edge of the boss is provided with a chamfer or rounded transition.

[0010] Furthermore, the cover body and the boss are made of heat-resistant steel or cast iron.

[0011] Furthermore, the boss is concentrically positioned with the cover body, and its height is 80-120mm.

[0012] The advantages and positive effects of this utility model are: 1. By extending the boss structure deep into the package opening, the amount of rock wool used is significantly reduced, thus lowering production costs; 2. The annular gap between the boss structure and the opening is fitted with annular rock wool, which provides a better seal, effectively preventing aluminum liquid leakage and splashing, and improving safety; 3. The boss structure acts as a buffer for the molten aluminum, further reducing the risk of molten aluminum splashing; 4. Rock wool is easy to replace, reducing labor costs and material waste; 5. It has a simple structure, is easy to manufacture and promote, and has good economic and social benefits. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the aluminum liquid transfer cover structure in the prior art; Figure 2 This is a schematic diagram of the aluminum liquid transfer bag cover structure provided by the present invention.

[0014] The reference numerals in the attached drawings are explained as follows: 10 - Cover body, 20 - Boss, 30 - Ring-shaped rock wool, 40 - Cover opening, 50 - Circular rock wool. Detailed Implementation

[0015] The present invention will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not limiting, and should not be used to limit the protection scope of the present invention.

[0016] See Figure 2 This embodiment provides a cover structure for a 500 kg aluminum molten material transfer bag. The structure includes: a cover body 10, a boss 20, and an annular rock wool 30.

[0017] The cover body 10 is made of heat-resistant steel by integral casting.

[0018] The boss 20, concentrically positioned with the cover body 10, is an inverted truncated cone. The large end of the truncated cone is integrally cast with the cover body 10. The boss 20 has a height of 110 mm.

[0019] The annular rock wool 30 is placed on the top surface of the opening 40. The annular rock wool 30 is slightly larger than the outer diameter of the large end of the boss 20, making it easy to fit in. It is located between the lower surface of the cover body 10 and the top surface of the opening 40 and is pressed tightly.

[0020] An annular gap, wider at the top and narrower at the bottom, is formed between the outer wall of the truncated cone and the inner wall of the opening 40, further suppressing splashing.

[0021] The small end edge of the boss 20 has a 5 mm radius arc transition to reduce eddies and impacts when molten aluminum surges upward.

[0022] The assembly and usage methods for this structure are as follows: (1) Place the ring-shaped rock wool 30 flat on the top surface of the opening 40; (2) Using the truncated cone as a guide, the cover body 10 is vertically closed, so that the protrusion 20 is inserted into the opening 40 and the annular rock wool 30 is pressed tightly. (3) During the transfer process, if the molten aluminum is jolted upwards by the bumps, it will first enter the gap formed by the cone and the ladle opening 40, which is wider at the top and narrower at the bottom. The flow rate will be gradually weakened. Then it will enter the buffer space, where the kinetic energy will be further reduced, thus avoiding splashing and leakage. (4) After the transfer is completed, lift the cover body 10 and replace it directly with the ring-shaped rock wool 30. The operation is simple and quick.

[0023] Compared with the existing method of using whole circular rock wool sheets, the amount of rock wool used is reduced by 75%. During 20 consecutive on-site transfers, no visible leakage or splashing was observed; the highest surface temperature rise of the cover was reduced by approximately 15°C, demonstrating good thermal insulation performance.

[0024] To further improve the pressure relief performance, a φ6 mm vent hole can be opened at the center of the small end face of the boss 20, which penetrates the cover body 10, facilitating the rapid balance of internal and external air pressure, and is suitable for working conditions with long transportation distances or bumpy roads.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, and these all fall within the protection scope of the present utility model.

Claims

1. An aluminum liquid transfer cover structure, characterized in that, include: Cover body (10); A boss (20) is formed extending downward from the lower surface of the cover body (10). The outer diameter of the boss (20) is smaller than the inner diameter of the bag opening (40) so as to be inserted into the bag opening (40). The annular rock wool (30) is set on the top surface of the opening (40), located between the lower surface of the cover body (10) and the top surface of the opening (40), and the inner diameter of the annular rock wool (30) is greater than the outer diameter of the boss (20), and the outer diameter is less than or equal to the outer diameter of the opening (40). The lower end of the protrusion (20) extends into the inside of the bag opening (40), and the lower end face of the protrusion (20) maintains a certain distance from the bottom face of the bag opening (40).

2. The aluminum liquid transfer cover structure according to claim 1, characterized in that: The protrusion (20) is an inverted truncated cone. Its large end is connected to the lower surface of the cover body (10), and its small end extends downward into the opening (40). The outer wall of the truncated cone forms a downward-contracting cone surface, which forms an annular gap that is wider at the top and narrower at the bottom with the inner wall of the opening (40).

3. The aluminum liquid transfer cover structure according to claim 2, characterized in that: The thickness of the annular rock wool (30) is 5 mm to 20 mm.

4. The aluminum liquid transfer cover structure according to claim 3, characterized in that: The boss (20) is integrally formed with the cover body (10), and the lower edge of the boss (20) is provided with a chamfer or rounded transition.

5. The aluminum liquid transfer cover structure according to claim 4, characterized in that: The cover body (10) and the boss (20) are made of heat-resistant steel or cast iron.

6. The aluminum liquid transfer cover structure according to claim 5, characterized in that: The boss (20) is concentrically arranged with the cover body (10), and the height of the boss (20) is 80 mm to 120 mm.

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