Nitrogen protection cover plate for molten aluminum launder

Abstract

The utility model discloses a molten aluminum launder nitrogen protection cover plate which comprises a cover body arranged corresponding to the top of a molten aluminum launder, the cover body is connected with a nitrogen pipeline arranged towards the inside of the molten aluminum launder, and the nitrogen pipeline is communicated with a nitrogen source and used for supplying nitrogen to the inside of the molten aluminum launder. When molten aluminum is transferred, nitrogen is continuously introduced into the molten aluminum launder through the nitrogen pipeline and gradually fills a closed space defined by the molten aluminum launder and the cover body, air in the molten aluminum launder is emptied, a nitrogen protection layer is formed on the surface of the molten aluminum, oxygen in the air is prevented from being subjected to oxidation reaction with the molten aluminum, and the molten aluminum is prevented from being oxidized. The production of oxides such as aluminum slag is effectively reduced, the burning loss and waste conditions are improved, and the increase of the production cost is inhibited; due to the arrangement of the lap joint matching structures, the adjacent cover plates can be connected in an end-to-end matching mode through the lap joint matching structures, open gaps between the adjacent cover plates are eliminated, the sealing performance of the cover plates is improved, nitrogen consumption is reduced, and the heat preservation performance of the molten aluminum launder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum liquid transportation, in particular to a nitrogen protection cover plate for an aluminum liquid flow trough. Background Art

[0002] Aluminum alloy auto parts usually use aluminum molten troughs for aluminum molten transfer during the casting process. Due to the chemical properties of aluminum that is easily oxidized, it is very easy to oxidize when in contact with air, resulting in a large amount of oxides produced during the aluminum molten transfer process, causing burnout and waste, and increasing production costs. At the same time, more oxides increase the workload of subsequent aluminum molten slag removal, which can easily cause the problem of incomplete aluminum molten cleaning and affect the casting quality of the product.

[0003] At present, in the process of aluminum liquid transportation, a cover plate is usually installed above the aluminum liquid flow trough to isolate the aluminum liquid from the air. However, due to the gap between the cover plates, air will inevitably enter the aluminum liquid flow trough through the gap and react with the aluminum liquid. This method only slows down the air convection inside and outside the aluminum liquid flow trough to a certain extent, and cannot achieve the isolation of aluminum liquid from the air, and the application effect is not ideal.

[0004] Based on this, developing a nitrogen protection cover for aluminum liquid flow trough for application in actual production is an urgent problem to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a nitrogen protection cover plate for an aluminum liquid flow trough in order to solve the problem that the aluminum liquid is easily oxidized when in contact with air during transportation, resulting in burning waste and increased production costs, while also solving the problem that a large amount of oxides are generated, which increases the workload of slag cleaning and affects the casting quality of the product.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A nitrogen protection cover plate for an aluminum liquid flow trough comprises a cover body arranged corresponding to the top of the aluminum liquid flow trough, the cover body is connected to a nitrogen pipeline arranged toward the inside of the aluminum liquid flow trough, the nitrogen pipeline is connected to a nitrogen source, and is used to supply nitrogen to the aluminum liquid flow trough.

[0008] Preferably, the nitrogen pipeline includes a plurality of branch blowing pipes arranged inside the cover body, the branch blowing pipes are arranged at intervals corresponding to the length direction of the aluminum liquid flow channel, the branch blowing pipes are respectively connected to the main pipeline, and the main pipeline is connected to the nitrogen source.

[0009] Preferably, a fire-resistant insulation layer is provided inside the cover body to improve the thermal insulation performance of the cover body.

[0010] Preferably, an overlap-fit ​​structure is provided at the end of the cover body in the length direction, so that adjacent cover bodies covered on the aluminum liquid flow channel can be connected end to end through the overlap-fit ​​structure to eliminate the open gap between adjacent cover bodies, and the overlap-fit ​​structure includes an upper connecting block arranged at one end of the cover body and a lower connecting block arranged at the other end of the cover body.

[0011] Preferably, the upper end surface of the upper connecting block is flush with the upper end surface of the cover body, and the lower end surface of the lower connecting block is flush with the lower end surface of the cover body.

[0012] Preferably, thermal insulation strips are correspondingly arranged on the overlapped matching structure, and the thermal insulation strips are respectively arranged on the lower end surface of the upper overlapping block and the upper end surface of the lower connecting block.

[0013] Preferably, a cover edge is provided on the inner side of the cover body corresponding to the outer wall of the aluminum liquid flow channel, and the cover edge is a plate-like structure vertically connected to the end of the cover body.

[0014] Preferably, a heat-insulating cotton strip is also provided on the inner side of the cover edge.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a nitrogen pipeline connected to a nitrogen source. When the aluminum liquid is transported, the nitrogen supplied by the nitrogen source is continuously passed into the aluminum liquid flow trough through the nitrogen pipeline, and gradually fills the closed space formed by the aluminum liquid flow trough and the cover body, so that the air in the aluminum liquid flow trough is emptied, and a nitrogen protective layer is formed on the surface of the aluminum liquid, thereby avoiding oxidation reaction between oxygen in the air and the aluminum liquid, effectively reducing the generation of oxides such as aluminum slag, improving the burning waste, and suppressing the increase in production costs; the overlapping structure is provided, so that adjacent cover plates covered on the aluminum liquid flow trough can be connected end to end through the overlapping structure, thereby eliminating the open gap between the adjacent cover plates, improving the sealing performance of the cover plates, saving nitrogen consumption, and improving the thermal insulation performance of the aluminum liquid flow trough. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure viewed from above.

[0020] Figure 3 , Figure 4 It is a structural schematic diagram of the overlapping cooperation of adjacent cover plates.

[0021] In the figure: 1--cover body; 11--cover edge; 2--nitrogen pipeline; 21--sub-blow pipe; 22--main pipeline; 3--nitrogen source; 4--refractory insulation layer; 5--lap joint structure; 51--upper overlap block; 52--lower connection block; 53--insulation cotton strip. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] like Figure 1-4 As shown, a nitrogen protection cover plate for an aluminum liquid flow trough includes a cover body 1 corresponding to the top of the aluminum liquid flow trough, and the cover body 1 is connected to a nitrogen pipeline 2 arranged toward the inside of the aluminum liquid flow trough, and the nitrogen pipeline 2 is connected to a nitrogen source 3 for supplying nitrogen to the aluminum liquid flow trough. When the aluminum liquid is transported, the cover body 1 is covered on the aluminum liquid flow trough to form a barrier to the air circulation inside and outside the aluminum liquid flow trough. At the same time, the nitrogen pipeline 2 is opened, and the nitrogen supplied by the nitrogen source 3 is continuously passed into the aluminum liquid flow trough through the nitrogen pipeline 2, and gradually fills the closed space formed by the aluminum liquid flow trough and the cover body 1, and the air in the aluminum liquid flow trough is emptied, and a nitrogen protective layer is formed on the surface of the aluminum liquid, which avoids the oxidation reaction between oxygen in the air and the aluminum liquid, effectively reduces the generation of oxides such as aluminum slag, improves the burning waste, and suppresses the rise in production costs.

[0024] As a preferred embodiment, Figure 1-2 As shown, the nitrogen pipeline 2 includes a plurality of branch blowing pipes 21 arranged on the inner side of the cover body 1, and the branch blowing pipes 21 are arranged at intervals corresponding to the length direction of the aluminum liquid flow groove, and the branch blowing pipes 21 are respectively connected to the main pipeline 22, and the main pipeline 22 is connected to the nitrogen source 3. When supplying gas, the nitrogen supplied by the main pipeline 22 is evenly blown into the aluminum liquid flow groove through the branch blowing pipes 21 arranged at intervals, so that the nitrogen can quickly and evenly fill the entire aluminum liquid flow groove, and the stability of the nitrogen supply is guaranteed.

[0025] Preferably, a fire-resistant insulation layer 4 is provided inside the cover 1 to improve the insulation performance of the cover 1, so as to reduce the heat loss of the aluminum liquid flow channel and achieve the purpose of energy saving and environmental protection. The insulation layer can be made of materials such as asbestos or rock wool.

[0026] Preferably, if Figure 3-4As shown, the end of the cover body 1 in the length direction is provided with an overlap structure 5, so that the adjacent cover plates covered on the aluminum liquid flow trough can be connected end to end through the overlap structure 5 to eliminate the open gap between the adjacent cover plates and improve the sealing of the cover plates. Specifically, the overlap structure 5 includes an upper overlap block 51 arranged at one end of the cover body 1 and a lower connection block 52 arranged at the other end of the cover body 1. The upper end surface of the upper overlap block 51 is flush with the upper end surface of the cover body 1, and the lower end surface of the lower connection block 52 is flush with the lower end surface of the cover body 1. When covered, the upper overlap block 51 of the cover body 1 overlaps the lower connection block 52 of the adjacent cover body 1 to achieve overlap of the cover plates, improve the sealing between the adjacent cover plates, save nitrogen consumption, and improve the thermal insulation performance of the aluminum liquid flow trough.

[0027] Furthermore, the overlapping structure 5 is provided with a corresponding heat-insulating cotton strip 53, which further improves the sealing performance of the adjacent cover body 1. The heat-insulating cotton strip 53 is respectively provided on the lower end surface of the upper overlap block 51 and the upper end surface of the lower connection block 52. When the cover is closed, the upper overlap block 51 and the lower connection block 52 of the adjacent cover body 1 are tightly overlapped by the heat-insulating cotton strip 53, which improves the sealing and heat-insulating properties.

[0028] Furthermore, a cover edge 11 is provided on the inner side of the cover body 1 corresponding to the outer wall of the aluminum liquid flow channel, and the cover edge 11 is a plate-shaped structure vertically connected to the end of the cover body 1. When the cover is closed, the cover edge 11 respectively abuts against the outer walls of the aluminum liquid flow channel on both sides, which, on the one hand, plays a role in positioning the cover plate relative to the aluminum liquid flow channel, facilitating the positioning and closing of the cover plate. On the other hand, the cover edge 11 wraps and clamps the outer wall of the aluminum liquid flow channel, further improving the sealing performance of the cover body 1.

[0029] Furthermore, a heat-insulating cotton strip 53 is also provided on the inner side of the cover edge 11 to further improve the sealing performance of the cover body 1.

[0030] The above disclosure is only a specific embodiment of the present invention, but the present invention is not limited thereto. For ordinary technicians in this field, without departing from the principle of the present invention, any deformation made should be regarded as belonging to the protection of the present invention.

Claims

1. A nitrogen protection cover plate for an aluminum liquid flow trough, characterized in that: The invention comprises a cover body (1) arranged corresponding to the top of the aluminum liquid flow trough, the cover body (1) is connected to a nitrogen pipeline (2) arranged toward the inside of the aluminum liquid flow trough, and the nitrogen pipeline (2) is connected to a nitrogen source (3) for supplying nitrogen into the aluminum liquid flow trough.

2. The nitrogen protection cover plate for aluminum liquid flow trough according to claim 1, characterized in that: The nitrogen pipeline (2) comprises a plurality of branch blowing pipes (21) arranged on the inner side of the cover body (1), the branch blowing pipes (21) being arranged at intervals corresponding to the length direction of the aluminum liquid flow channel, the branch blowing pipes (21) being respectively connected to the main pipeline (22), and the main pipeline (22) being connected to the nitrogen source (3).

3. The nitrogen protection cover plate for aluminum liquid flow trough according to claim 1, characterized in that: A fire-resistant heat-insulating layer (4) is provided on the inner side of the cover body (1) to improve the heat-insulating performance of the cover body (1).

4. The nitrogen protection cover plate for aluminum liquid flow trough according to claim 1, characterized in that: An overlap-fitting structure (5) is provided at the end of the cover body (1) in the length direction, and the overlap-fitting structure (5) comprises an upper overlap block (51) provided at one end of the cover body (1) and a lower connect block (52) provided at the other end of the cover body (1), and the upper overlap block (51) overlaps and fits with the lower connect block (52).

5. The nitrogen protection cover plate for aluminum liquid flow trough according to claim 4, characterized in that: The upper end surface of the upper connecting block (51) is flush with the upper end surface of the cover body (1), and the lower end surface of the lower connecting block (52) is flush with the lower end surface of the cover body (1).

6. The nitrogen protection cover plate for aluminum liquid flow trough according to claim 5, characterized in that: The overlapping structure (5) is provided with a corresponding heat-insulating cotton strip (53), and the heat-insulating cotton strip (53) is respectively arranged on the lower end surface of the upper overlapping block (51) and the upper end surface of the lower connecting block (52).

7. The nitrogen protection cover plate for aluminum liquid flow trough according to claim 1, characterized in that: A cover edge (11) is provided on the inner side of the cover body (1) corresponding to the outer wall of the aluminum liquid flow channel, and the cover edge (11) is a plate-shaped structure vertically connected to the end of the cover body (1).

8. The nitrogen protection cover plate for aluminum liquid flow trough according to claim 7, characterized in that: A heat-insulating cotton strip (53) is arranged on the inner side of the cover edge (11).

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