Roasting annular furnace for small-section formwork

Abstract

The utility model discloses a small-section formwork roasting annular furnace, which solves the problems of incapability of continuously producing small-batch formworks, larger unit energy consumption and the like in the prior art, and is characterized in that a high-quality section steel frame is used for building a fire-resistant thermal insulation material in the annular furnace body (1); the furnace bottom rotating platform (2) is driven by a gear speed reducer with a gear chain, the combustors (3) are uniformly distributed at multiple points along the tangent line of the outer ring of the furnace wall of the annular furnace body (1), the smoke exhaust cylinder (4) is arranged at the central position of the furnace bottom rotating platform (2) and is communicated with a furnace bottom smoke exhaust device, and the furnace door (5) is arranged on one side of the furnace wall of the annular furnace body (1) and is controlled by an automatic control device to ascend and descend. The device has the advantages of simple structure, low maintenance rate, lower energy consumption, excellent working environment and the like, effectively reduces the production and operation cost of enterprises, and has very wide market prospects.

Description

Technical Field

[0001] The utility model belongs to the field of mold shell baking production in the precision casting industry, in particular to a small-section mold shell baking annular furnace. Background Art

[0002] As the market scale of the precision casting industry continues to expand, the demand for investment casting mold shells as casting consumables is greater. As one of the main equipment for mold shell production, general tunnel kilns and rotary furnaces are suitable for situations with a certain production capacity. When the production capacity is small, the above furnaces have a large output and do not match the casting smelting cycle; the roasting process and the smelting cycle can also be matched by appropriately increasing the roasting time, but increasing the roasting time will undoubtedly increase the burning fuel consumption. At the same time, due to the large heat dissipation area of ​​the furnace head and furnace tail of the tunnel kiln, energy is wasted and the working conditions in the workshop are poor. Summary of the invention

[0003] The purpose of the utility model is to provide a small-section mold shell baking annular furnace suitable for small production capacity, which can ensure the product firing system and product qualification rate, and can also meet the continuous production of different mold shells, and at the same time has low unit energy consumption.

[0004] The technical scheme of the utility model is: it includes an annular furnace body, a furnace bottom rotating platform, a burner, a smoke exhaust pipe, a furnace door and an automatic control device, etc. The annular furnace body adopts a high-quality steel frame to build refractory heat-insulating materials, the furnace bottom rotating platform adopts a gear reducer with a gear chain drive, the burner adopts a straight flame high-speed burner, and is evenly distributed at multiple points along the outer ring tangent of the furnace wall of the annular furnace body, the smoke exhaust pipe is arranged at the center of the furnace bottom rotating platform, communicated with the furnace bottom smoke exhaust device, and smoke holes are evenly distributed at the bottom of the smoke exhaust pipe, and the smoke exhaust pipe is cast with refractory casting material or formed by special-shaped bricks. The furnace door is arranged on one side of the furnace wall of the annular furnace body, and its lifting is controlled by the automatic control device.

[0005] The beneficial effects of the utility model are: due to the use of a straight flame burner as a combustion device, the burner is evenly distributed along the outer ring tangent line and at multiple points, and a smoke exhaust pipe system is set in the middle. The smoke exhaust pipe not only separates the space in the kiln, but also plays a role in exhausting smoke, which can ensure the product firing system and product qualification rate, and can also meet the small batch continuous production of different small-section mold shells. Compared with the traditional tunnel kiln mold shell baking line, it has the advantages of simple structure, low maintenance rate, low energy consumption, and excellent working environment, which effectively reduces the production and operation costs of enterprises, and has a very broad market prospect.

[0006] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0008] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0009] Figure 3 This is a schematic diagram of the main structure of the smoke exhaust pipe of the utility model;

[0010] Figure 4 This is a schematic diagram of the structure of the smoke exhaust pipe of the utility model from a top view.

[0011] In the figure: 1 is the annular furnace body, 2 is the furnace bottom rotating platform, 3 is the burner, 4 is the smoke exhaust pipe, 5 is the furnace door, 6 is the mold shell, and 7 is the smoke hole. DETAILED DESCRIPTION

[0012] like Figure 1 , Figure 2 As shown, the small-section shell baking annular furnace includes an annular furnace body 1, a furnace bottom rotating platform 2, a burner 3, a smoke exhaust pipe 4, a furnace door 5 and an automatic control device, etc. The annular furnace body 1 is built with refractory insulation materials in a high-quality steel frame, with small heat storage and good insulation effect. The furnace bottom rotating platform 2 adopts a gear reducer with a gear chain drive, and the transmission is stable and reliable. The burner 3 adopts a straight flame high-speed burner, which is evenly distributed at multiple points along the outer ring tangent of the furnace wall of the annular furnace body 1. The flame airflow is ejected at a high speed, stirring the airflow in the furnace, which can reduce the temperature difference in the furnace. The smoke exhaust pipe 4 is cast and formed with refractory casting material and placed at the center of the furnace bottom rotating platform 2. A number of small smoke holes 7 are opened in the annular direction of the bottom for smoking. The smoke from the central through hole is evenly inhaled through the small smoke holes 7 and discharged through the central large hole; the smoke exhaust pipe 4 not only serves to separate the space in the kiln, but also serves to exhaust smoke. The furnace door 5 is arranged on one side of the furnace wall of the annular furnace body 1, and is electrically lifted and pressed by a cylinder. The furnace mouth is small and the amount of smoke overflow is small. When implementing the utility model, firstly, different small-section molds 6 are placed in the furnace of the annular furnace body 1 by the manipulator, and then the burner 3 is ignited. After each production cycle, the furnace door 5 is opened, and the manipulator takes out a baked mold 6, and sends a mold raw material into the furnace for baking. This is repeated until all small-section molds are baked continuously. It has the advantages of simple structure, low maintenance rate, low energy consumption, and excellent working environment. It effectively reduces the production and operation costs of enterprises, can ensure the product firing system and product qualification rate, and can also meet the small-batch continuous production of different small-section molds, and has a very broad market prospect.

[0013] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A small-section shell baking annular furnace, comprising an annular furnace body (1), a furnace bottom rotating platform (2), a burner (3), a smoke exhaust pipe (4), a furnace door (5) and an automatic control device, characterized in that: The annular furnace body (1) is constructed of high-quality steel frame and refractory heat-insulating materials. The furnace bottom rotating platform (2) is driven by a gear reducer with a gear chain. The burners (3) are evenly distributed at multiple points along the outer ring tangent of the furnace wall of the annular furnace body (1). The smoke exhaust pipe (4) is arranged at the center of the furnace bottom rotating platform (2) and is connected to the furnace bottom smoke exhaust device. The furnace door (5) is arranged on one side of the furnace wall of the annular furnace body (1) and is controlled to rise and fall by an automatic control device.

2. A small-section shell baking annular furnace according to claim 1, characterized in that: The smoke exhaust pipe (4) has smoke holes (7) evenly distributed on the bottom.

3. A small-section shell baking annular furnace according to claim 1 or 2, characterized in that: The burner (3) adopts a straight flame high-speed burner.

4. A small-section shell baking annular furnace according to claim 3, characterized in that: The smoke exhaust pipe (4) is cast by using refractory casting material.

5. The small-section shell baking annular furnace according to claim 3, characterized in that: The smoke exhaust pipe (4) is formed by masonry of special-shaped bricks.

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