Heat accumulating type mold shell roasting annular furnace

Abstract

The utility model discloses a heat accumulating type mould shell roasting annular furnace, which solves the problems that a small batch of mould shells cannot be continuously produced, the unit energy consumption is larger 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 heat-insulating 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) and the annular furnace top (1) are arranged in pairs, the combustion-supporting air and smoke exhaust pipeline (4) is arranged on the furnace top and controls reversing smoke exhaust and combustion supporting of the burners through a stop valve, and the furnace door (5) is arranged on one side of the furnace wall of the annular furnace body (1) and is controlled to ascend and descend through an automatic control device. 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 heat storage type mold shell baking annular furnace. Background Art

[0002] As the precision casting market continues to expand, investment casting molds, as foundry consumables, are in greater demand. Conventional tunnel kilns, a key piece of equipment for mold production, require a certain production capacity for continuous production, limiting flexibility for adapting to different molds. Furthermore, the kilns' large heat dissipation area at the head and tail of the furnaces wastes energy and creates harsh working conditions in the workshop. Utility Model Content

[0003] The purpose of the utility model is to provide a heat storage type mold baking annular furnace which can ensure the product firing system and product qualification rate, meet the continuous production of different molds, and has low unit energy consumption.

[0004] The technical solution of this utility model is as follows: it comprises an annular furnace body, a furnace bottom rotating platform, burners, combustion air and smoke exhaust ducts, a furnace door, and an automatic control device. The furnace body is constructed of a high-quality steel frame built with refractory and heat-insulating materials. The furnace bottom rotating platform is driven by a gear reducer with a gear chain. The burners are regenerative flat-flame burners, arranged in pairs of 1 to 3 at the furnace top. Each flat-flame burner is equipped with a heat storage body. Burner combustion or smoke exhaust is controlled by switching valves installed in the combustion air and smoke exhaust ducts. An auxiliary smoke exhaust port is provided at the center of the furnace top. The furnace door is located on one side of the furnace wall of the annular furnace body and is divided into a feed door and a discharge door. Its raising and lowering is controlled by an automatic control device.

[0005] The beneficial effects of this utility model are as follows: due to the use of heat storage flat flame burners as combustion devices, the burners are evenly distributed in pairs along the furnace roof, and the flame spraying area is large. A heat storage body is set inside the burner, and the combustion-supporting and smoke exhaust pipes are set on the furnace roof and switched by a shut-off valve. This can effectively reduce product energy consumption, adapt to product firing systems, ensure product qualification rates, and meet the needs of continuous mold production. Compared with traditional tunnel kiln mold baking lines, this has the advantages of simple structure, low maintenance rate, low energy consumption, and excellent working environment, effectively reducing the production and operation costs of enterprises, and has a very broad market prospect.

[0006] The present invention will be 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 of the structure of the utility model;

[0009] Figure 3 This is a schematic diagram of the combustion-supporting and smoke exhaust pipe structure of the utility model;

[0010] Figure 4 This is a schematic structural diagram of the heat storage flat flame burner of the utility model.

[0011] In the figure: 1 is the annular furnace body, 2 is the furnace bottom rotating platform, 3 is the burner, 4 is the combustion-supporting smoke exhaust pipe, 5 is the furnace door, 6 is the mold shell, 7 is the auxiliary smoke exhaust port, and 8 is the heat storage body. DETAILED DESCRIPTION

[0012] like Figure 1 、 Figure 2As shown, the regenerative shell baking annular furnace includes an annular furnace body 1, a furnace bottom rotating platform 2, burners 3, combustion air and smoke exhaust ducts 4, a furnace door 5, and an automatic control device. The burners 3 are regenerative flat-flame burners, arranged in pairs along the top of the annular furnace body 1. There are 1 to 3 pairs of regenerative flat-flame burners, each equipped with a regenerative element 8. The burners 3 control the exhaust or ignition state of the burners via shut-off valves located on the combustion air and smoke exhaust ducts 4, completing the burner's reversible heat storage. The furnace body 1 is constructed of a high-quality steel frame built with refractory and thermal insulation materials. The furnace bottom rotating platform 2 is driven by a gear reducer with a gear chain. The furnace door 5 is located on one side of the furnace wall of the annular furnace body 1 and is divided into a feed door and a discharge door. Its raising and lowering is controlled by an automatic control device. An auxiliary smoke exhaust port 7 is located at the center of the top of the furnace. When one heat-storage flat-flame burner is burning, the other corresponding heat-storage flat-flame burner is exhausting smoke. A heat storage element 8 is installed inside the burner 3. During smoke exhaust, the flue gas heats the heat storage element 8 to store heat, reducing the exhaust temperature. After a switching cycle, the burner in the exhaust mode switches to the combustion mode. The heat storage element preheats the combustion air, increasing the combustion air temperature and effectively saving energy. The furnace top flat-flame structure is adopted, and the flame ejection disk area is large, which can evenly heat the product. The combustion and smoke exhaust pipes 4 are installed on the furnace top and are connected to the burner and the combustion and exhaust fans respectively. A shut-off valve is installed on each burner combustion and smoke exhaust branch pipe to switch the burner state. At the same time, to stabilize the furnace pressure, the furnace entrance and exit doors 5 are installed on the side of the furnace wall of the annular furnace body 1. They are divided into a feed furnace door and a discharge furnace door, separated by a refractory wall. The furnace door is electrically lifted and compressed by a cylinder. The furnace mouth is small and the amount of smoke overflow is small. When implementing the present invention, after the inlet furnace door is opened, the mold shell 6 is first fed into the annular furnace body 1 by a manipulator and then fed to the firing area where the burner 3 is arranged for firing via the rotating platform 2 at the bottom of the furnace. At the same time, the outlet furnace door 5 is opened, and the manipulator removes a fired mold shell 6. The firing process is carried out simultaneously, and continuous firing is completed. The present invention has the advantages of a reasonable and simple structure, reduced maintenance costs, energy savings, and an excellent working environment. It effectively reduces the production and operation costs of enterprises, ensures the product firing system and product qualification rate, and can also meet the needs of batch continuous production. The market prospects are very broad.

[0013] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A regenerative shell baking annular furnace, comprising an annular furnace body (1), a furnace bottom rotating platform (2), a burner (3), a combustion air and smoke exhaust duct (4), a furnace door (5) and an automatic control device, characterized in that: The burners (3) are heat storage flat flame burners, which are arranged in pairs along the furnace top of the annular furnace body (1). The burners (3) control the exhaust or ignition combustion state of the burners through the shut-off valves arranged on the combustion air and smoke exhaust pipes (4), thereby completing the reversing heat storage of the burners. The annular furnace body (1) is made of high-quality steel frame built with refractory insulation materials. The furnace bottom rotating platform (2) is driven by a gear reducer with a gear chain. The furnace door (5) is arranged on one side of the furnace wall of the annular furnace body (1) and is divided into a feeding furnace door and a discharging furnace door. The lifting and lowering of the furnace door is controlled by an automatic control device.

2. The regenerative shell baking annular furnace according to claim 1, characterized in that: The annular furnace body (1) adopts a double-door ring structure, and an auxiliary smoke exhaust port (7) is provided at the center of the top of the furnace.

3. The regenerative formwork baking annular furnace according to claim 1 or 2, characterized in that: One to three pairs of heat-storage flat-flame burners are arranged on the top of the annular furnace body (1), and a heat storage body (8) is arranged in each flat-flame burner.

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