Ladle dryer for centrifugal casting chute ladle

Abstract

The utility model discloses a ladle baking device for a centrifugal casting chute ladle. The ladle baking device comprises a chute brick baking device and a chute nozzle baking device which are independent and split. Two spiral grooves in the same direction are formed in the outer surface of a light brick of the roaster, and a through hole is formed in the inner end of the light brick and connected with the two spiral grooves. The heating wire is spirally wound in the spiral groove and penetrates through the through hole, and the two power connection ends penetrate through the ceramic tube on the cover body to be exposed. Inner thermal insulation cotton of the cover body is attached to the inner surface of a steel plate, the steel plate is fixed to the middle of a connecting rod, the inner end of the connecting rod is in threaded connection with the outer end of a light brick, and the cover body and the light brick are fixed into a whole. The inner end part of the light brick is provided with a convex block, and the convex block improves the stress of the light brick and does not hinder the winding of the heating wire. And the light bricks are conformal with the inner surface of the runner of the chute ladle. The device is taken and placed from an inlet and an outlet of the chute ladle, and is convenient to operate. And the heating efficiency is high.

Description

Technical Field

[0001] This utility model is applied in the field of centrifugal casting, and relates to a chute ladle for guiding molten metal in a horizontal centrifuge, specifically a ladle drying device for a chute ladle. Background Technology

[0002] In horizontal centrifuge casting, the chute is an indispensable casting tool, used to guide molten steel into a high-speed rotating horizontal mold. Under centrifugal force, the molten steel solidifies into a tubular casting. To reduce the temperature drop caused by the pouring through the chute, it is advisable to bake the chute at high temperature before use. Chute baking often uses gas; workshops with the necessary facilities bake the chute until it glows red-hot, while workshops lacking such facilities simply heat the chute without evaporating water vapor. This gas-fired baking method results in low efficiency and high cost due to the dissipation of high-temperature gases after combustion. CN102310191A (an electric ladle baking device), CN203509015U (a resistance baking device), and CN220582967U (a molten iron ladle drying device for casting) provide electrically heated ladle baking devices.

[0003] Centrifugal casting chute typically includes a chute body and a spout. The spout is usually a horizontal tube. To avoid dead zones, the gating system inside the chute body should be shaped like a cow horn. This cow horn gating system can be formed using a mold or directly using molded refractory bricks. This utility model is designed using a cow horn gating chute as an example. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a drying device for centrifugal casting chute packaging, which adopts resistance wire closed heating to improve the drying efficiency and is easy to operate.

[0005] The technical solution adopted in this utility model is as follows: a drying device for centrifugal casting chute packages includes an independently separate chute brick drying device and a chute nozzle drying device. Both drying devices include a connecting rod, a cover, a heating wire, and a lightweight brick. The outer surface of the lightweight brick is provided with two unidirectional spiral grooves, and a through hole is provided at the inner end of the lightweight brick, connecting the two spiral grooves. The heating wire is spirally wound inside the spiral grooves, passes through the through hole, and its two electrical terminals pass through a ceramic tube on the cover, protruding from the outside of the cover. The cover is used to seal the heating chamber and includes a steel plate and inner insulation cotton. The inner insulation cotton is applied to the inner surface of the steel plate to provide thermal resistance and insulation. The steel plate is fixed to the middle of the connecting rod, and the inner end of the connecting rod is threadedly connected to the center hole at the outer end of the lightweight brick. The cover and the lightweight brick are fixed together as a single unit through the connecting rod.

[0006] Furthermore, a protrusion is provided below the inner end of the lightweight brick. The protrusion is used to support the inner end of the lightweight brick, avoid the lightweight brick being suspended in a single-arm beam manner, and improve its stress state. However, the protrusion must not obstruct the winding of the heating wire, for example, it can be set along the direction of the spiral groove.

[0007] Furthermore, the lightweight bricks of the chute brick baker conform to the inner surface of the chute bricks, and the lightweight bricks of the nozzle baker conform to the tubular inner surface of the nozzle. This ensures a proper distance from the inner cavity of the chute, thereby improving heating and baking efficiency.

[0008] Furthermore, the cover of the chute brick baking device is a flat sealing cover that seals the upper opening of the chute brick, and the cover of the spout baking device is a cap-shaped spout cover that seals the outer opening of the spout and is fixed by the outer opening.

[0009] Furthermore, a fixing claw is welded to the inner surface of the steel plate of the sealing cover to secure the inner insulation cotton. The outer surface of the steel plate of the sealing cover is covered with outer insulation cotton to increase the insulation effect and prevent burns.

[0010] Furthermore, a handle is fixedly connected to the outer end of the connecting rod to facilitate the taking and placing of the oven.

[0011] The beneficial effects of this utility model are as follows: This utility model adopts an independent and separate chute brick baking device and chute nozzle baking device, which are respectively taken out and put in from the inlet and outlet of the chute bag, making operation convenient. The chute bricks and chute nozzles of the chute bag are sealed and electrically heated, and the heating wire is installed to conform to the inner surface of the chute bag's pouring channel, resulting in high heating efficiency. Attached Figure Description

[0012] Figure 1 This is a front view of the structure of the chute brick baking device of this utility model;

[0013] Figure 2 for Figure 1 The left view;

[0014] Figure 3 for Figure 2 AA cross-sectional view (heating wire not installed);

[0015] Figure 4 This is a front view of the structure of the slurry baking device of this utility model;

[0016] Figure 5 for Figure 4 The right view;

[0017] Figure 6 for Figure 5 A cross-sectional view of the BB (without heating wire installed);

[0018] Figure 7 A schematic diagram showing the handling of bricks in a chute.

[0019] Figure 8 This is a schematic diagram of the baking process of the chute bag;

[0020] Among them: 1-handle, 2-connecting rod, 3-outer insulation cotton, 4-steel plate, 5-inner insulation cotton, 6-heating wire, 7-lightweight brick, 8-protrusion, 9-electric terminal, 10-ceramic tube, 11-lifting claw, 12-spiral groove, 13-through hole, 14-drip cap;

[0021] 21-Club body, 22-Club brick, 23-Club spout. Detailed Implementation

[0022] The terms "inner" and "outer" below refer to the heated, enclosed cavity. "Welding fixation" only specifies the fixing method and also includes other fixing methods such as fasteners and riveting. "Same direction" refers to the same clockwise or counterclockwise direction. "Below" refers to the attached... Figure 8 The relative positions refer to the usage state. The dashed lines in the attached diagram only indicate the spiral direction of the heating wire and spiral groove on the back side of the diagram.

[0023] This utility model of a chute bag drying device includes an independent chute brick baking device and a chute nozzle baking device, both of which use resistance wire heating.

[0024] The structure of the chute brick baking machine is shown in the attached figure. Figure 1-3 As shown, the assembly includes a handle 1, a connecting rod 2, a sealing cover, a heating wire 6, and a lightweight brick 7. The handle 1 is welded and fixed to the outer end of the connecting rod 2 for placing and removing the oven. The sealing cover is flat and includes a steel plate 4 and inner insulation cotton 5. The steel plate 4 is welded and fixed to the middle of the connecting rod 2, and the inner insulation cotton 5 is applied to the inner surface of the steel plate 4, providing a sealing and heat insulation function to enhance the baking effect of the sealed heating cavity. The inner end of the connecting rod 2 is threaded to the center hole at the outer end of the lightweight brick 7, thus fixing the steel plate and lightweight brick together as a single unit via the connecting rod.

[0025] The lightweight brick 7 of the chute brick baking oven conforms to the inner surface of the horn-shaped chute brick to enhance the baking effect, as closer proximity results in better radiant heating. Two unidirectional spiral grooves 12 are provided on the outer surface of the lightweight brick 7, and the heating wire 6 is spirally wound within these grooves. The spiral grooves support, limit, and protect the heating wire. A through hole 13 is provided at the inner end of the lightweight brick, connecting the two unidirectional spiral grooves 12. The heating wire starts from the outer end of the lightweight brick, winds along one spiral groove, passes through the through hole, winds along the other spiral groove, and returns to the outer end of the lightweight brick. This allows both electrical terminals 9 of the heating wire to be located on the outer side of the steel plate. To prevent leakage due to contact between the heating wire and the steel plate, a ceramic tube 10 is installed on the steel plate. This ceramic tube is insulated and fire-resistant; the electrical terminals, exposed through the ceramic tube, can be connected to power. A protrusion 8 is provided at the inner end of the lightweight brick, protruding downwards to support the lightweight brick and improve its stress distribution.

[0026] To extend the service life of the inner insulation cotton, multiple lifting claws 11 are welded and fixed to the inner surface of the steel plate for hoisting the inner insulation cotton. To enhance the insulation effect, outer insulation cotton 3 can be covered on the outer surface of the steel plate to prevent burns from high temperatures on the handles or electrical terminals.

[0027] The structure of the slurry baking utensil is shown in the attached figure. Figure 4-6 As shown, the assembly includes a handle 1, a connecting rod 2, a spout cap 14, a heating wire 6, and a lightweight brick 7. The handle 1 is welded and fixed to the outer end of the connecting rod 2 for placing and removing the oven. The spout cap 14 is cap-shaped and includes a steel plate 4 and inner insulation cotton 5. The steel plate 4 is welded and fixed to the middle of the connecting rod 2, and the inner insulation cotton 5 is applied to the inner surface of the steel plate 4, providing a sealing and heat insulation function to enhance the baking effect of the sealed heating cavity. The inner end of the connecting rod 2 is threaded to the center hole at the outer end of the lightweight brick 7, thus fixing the steel plate and lightweight brick together as a single unit via the connecting rod.

[0028] The lightweight brick 7 of the slurry oven conforms to the tubular inner surface of the slurry to enhance the baking effect. Two unidirectional spiral grooves 12 are provided on the outer surface of the lightweight brick 7. The heating wire 6 is spirally wound within these grooves 12, which serve to support, limit, and protect the heating wire. A through hole 13 is provided at the inner end of the lightweight brick, connecting the two unidirectional spiral grooves 12. The heating wire starts from the outer end of the lightweight brick, winds along one spiral groove, passes through the through hole, winds along the other spiral groove, and returns to the outer end of the lightweight brick. Thus, both electrical terminals 9 of the heating wire can be located on the outer side of the steel plate. To prevent leakage due to contact between the heating wire and the steel plate, a ceramic tube 10 is installed on the steel plate. This ceramic tube is insulated and fire-resistant; the electrical terminals, after passing through the ceramic tube and exposed, can be connected to power. A protrusion 8 is provided below the inner end of the lightweight brick, which supports the lightweight brick and improves its stress distribution.

[0029] In use, the lightweight bricks of the chute brick baking machine are placed into the chute brick 22 from the top opening of the chute body 21, as shown in the attached figure. Figure 7 As shown, while placing it downwards, rotate it along the arc of the chute brick. When the sealing cover is nearly horizontal, release it. The sealing cover seals the upper opening of the chute brick 22. At the same time, the protrusion at the inner end of the lightweight brick falls down to contact the inner bottom surface of the chute brick's opening, supporting the lightweight brick and preventing it from being suspended like a single-arm beam. This improves the stress state of the lightweight brick, as shown in the attached diagram. Figure 8 As shown. The lightweight brick in the sluice brick baking device extends inward from the outer opening of the sluice 23, with the protrusion located below. The cap-shaped sluice cover seals the outer opening of the sluice and is supported by the sluice. After release, the protrusion at the inner end of the lightweight brick and the sluice cover support the lightweight brick, preventing it from being suspended like a single-arm beam. In this way, the sealing cover of the sluice brick baking device and the sluice cover of the sluice baking device seal the sluice brick 22 and the sluice 23, and then it can be heated by electricity. Before pouring molten steel, the sluice brick baking device and the sluice baking device are removed, and the lightweight brick is covered with an insulating sleeve to reduce heat loss, so that it can be used for baking again before the next pour.

[0030] It should be noted that: 1) Under the guidance of the above principles, reducing weight facilitates the handling and placement of the baking device. Therefore, measures such as hollowing out the interior of lightweight bricks, thinning the steel plate and using reinforcing ribs, and hollowing out the connecting rods can be adopted to reduce weight. 2) The above embodiment uses a horn-shaped gating system as an example to illustrate the baking device. If the shape of the gating system of the chute is changed, the shape of the lightweight brick can be changed in the same way. 3) The protrusions are set at the inner end of the lightweight brick. The end face of the inner end is not emphasized, as long as it does not affect or hinder the winding of the heating wire in the spiral groove. For example, the protrusions can be set between the spiral grooves, consistent with the spiral direction of the spiral grooves. 4) The lightweight bricks are made of refractory lightweight materials.

[0031] This invention employs an independent, separate chute brick baking unit and a chute nozzle baking unit, which are respectively loaded and unloaded from the inlet and outlet of the chute, making operation convenient. The chute bricks and nozzles of the chute are baked in a sealed, electrically conductive manner, without the use of gas. The heating wire is installed to conform to the inner surface of the chute's runner, resulting in high heat utilization and heating efficiency. The heating wire is supported, limited, and protected by a spiral groove, while protrusions improve the stress state of the lightweight bricks, extending the service life of the baking unit.

Claims

1. A drying device for centrifugal casting chute packaging, characterized in that: The device includes two independently separate chute brick bakers and a spout baker; each baker includes a connecting rod, a cover, a heating wire, and a lightweight brick; the outer surface of the lightweight brick is provided with two unidirectional spiral grooves, and the inner end of the lightweight brick is provided with a through hole, the through hole connecting the two spiral grooves; the heating wire is spirally wound in the spiral grooves, passes through the through hole, and the two electrical terminals of the heating wire pass through a ceramic tube on the cover and are exposed on the outer side of the cover; the cover includes a steel plate and inner insulation cotton, the inner insulation cotton is attached to the inner surface of the steel plate, the steel plate is fixed to the middle of the connecting rod, and the inner end of the connecting rod is threadedly connected to the center hole at the outer end of the lightweight brick.

2. The drying device for centrifugal casting chute packaging according to claim 1, characterized in that: A protrusion is provided below the inner end of the lightweight brick, and the protrusion does not obstruct the winding of the heating wire.

3. A drying device for centrifugal casting chute packaging according to claim 2, characterized in that: The protrusions are arranged along the helical direction of the helical groove.

4. A drying device for centrifugal casting chute packaging according to claim 1, characterized in that: The lightweight bricks of the chute brick baking machine conform to the inner surface of the chute bricks, and the lightweight bricks of the spout baking machine conform to the inner surface of the tubular spout.

5. A drying device for centrifugal casting chute packaging according to claim 1, characterized in that: The cover of the chute brick baker is a flat sealing cover, and the cover of the spout baker is a cap-shaped spout cover.

6. A drying device for centrifugal casting chute packaging according to claim 5, characterized in that: The inner surface of the steel plate of the sealing cover is welded with a fixed lifting claw.

7. A drying device for centrifugal casting chute packaging according to claim 5, characterized in that: The outer surface of the steel plate of the sealing cover is covered with external insulation cotton.

8. A drying device for centrifugal casting chute packaging according to claim 1, characterized in that: The handle is fixedly connected to the outer end of the connecting rod.

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