Round spinning preheating furnace

Abstract

The utility model discloses a circular spinning preheating furnace, which relates to the technical field of preheating furnaces, and comprises a furnace body, a furnace bottom, a material taking furnace mouth, a material rack, a burner and a hot air circulating fan, the furnace body is cylindrical, the furnace body is rotatably arranged at the upper end of the furnace bottom, and the bottom of the furnace bottom is fixedly connected with a guide rail; the material taking furnace opening is formed in the outer side of the furnace body, the material frame is arranged in the furnace body, the combustion engine is fixedly installed in the furnace body, and the hot air circulating fan is fixedly installed at the top end of the furnace body. According to the preheating furnace, the workshop space can be more effectively utilized, meanwhile, heat can be evenly spread, too large local temperature difference is avoided, meanwhile, the furnace bottom can be driven by the motor to rotate, a workpiece can be more evenly heated in the preheating process, and the problem that heat transmission at the fixed position is not even is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of preheating furnaces, in particular to a circular spinning preheating furnace. Background Art

[0002] Spinning is a metal processing technology that is usually used to manufacture round or cylindrical workpieces, such as barrels, boilers and containers. Among them, aluminum alloy wheels for automobiles use spinning technology. During the spinning process of automobile wheels, a preheating furnace is set up to preheat the metal blank to an appropriate temperature in advance to increase its plasticity, making spinning easier and more precise.

[0003] The traditional spinning preheating furnace adopts a rectangular box structure, which is equipped with heating elements (such as electric heating tubes or gas burners), temperature control systems and insulation materials. As a result, the structure is relatively bulky and occupies a large area, which is not conducive to space utilization. At the same time, the heat transfer is uneven, resulting in uneven surface temperature distribution of the workpiece during the preheating process. Based on this, this scheme provides a circular spinning preheating furnace to solve the above-mentioned problems. Utility Model Content

[0004] In order to solve the above technical problems, a circular spinning preheating furnace is provided. This technical solution solves the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A circular spinning preheating furnace comprises a furnace body, a furnace bottom, a charging furnace opening, a material rack, a burner and a hot air circulation fan: the furnace body, the furnace body is arranged in a cylindrical shape, the furnace body is rotatably installed at the upper end of the furnace bottom, and a plurality of groups of protective guardrails and support columns are fixedly connected to the outer side of the lower end of the furnace body; the furnace bottom, the furnace bottom is arranged in a cylindrical shape, and a guide rail is fixedly connected to the bottom of the furnace bottom; the charging furnace opening is arranged on the outer side of the furnace body, and a furnace door is rotatably installed on the outer end of the charging furnace opening; the material rack is arranged inside the furnace body, and the lower end of the material rack is fixedly connected to the upper end of the furnace bottom; the burner, the burner is fixedly installed inside the furnace body, the lower end of the burner is rotatably connected to the upper end of the furnace bottom, and the control end of the burner is arranged at the outer end of the furnace body; the hot air circulation fan, the hot air circulation fan is fixedly installed on the top of the furnace body, and the hot air circulation mode of the hot air circulation fan adopts an independent small circulation.

[0007] Preferably, a fixing plate is fixedly connected to the top of the protective guardrail.

[0008] Preferably, a reinforcing rod is fixedly connected to the inner side of the bottom of the support column, and the other end of the reinforcing rod is fixedly connected to a uniform connecting block.

[0009] Preferably, a guide wheel is rotatably mounted on the upper end of the support column, and the upper end of the guide wheel is movably connected to the guide rail.

[0010] Preferably, the protective guardrails and the support columns are evenly arranged in a ring shape, and the protective guardrails and the support columns are staggered.

[0011] Preferably, a burner platform is fixedly installed on the outer side of the furnace body, a platform ladder is provided on the lower side of the burner platform, a furnace top ladder is provided on the upper side of the burner platform, and the burner platform is provided on the lower side of the control end of the burner.

[0012] Preferably, a furnace top guardrail is fixedly connected to the top of the furnace body.

[0013] Compared with the prior art, the utility model proposes a circular spinning preheating furnace, which has the following beneficial effects:

[0014] 1. The furnace body of the utility model is cylindrical in shape. Compared with the rectangular structure, the cylindrical structure is more compact and can make more effective use of the plant space. It is especially suitable for workplaces with limited space. It is also conducive to the uniform spread of heat, which can improve the heating uniformity of the workpiece and avoid excessive local temperature differences. At the same time, the furnace bottom can be rotated by a motor drive, so that the workpieces on the internal material rack can be heated more evenly during the preheating process, avoiding the problem of uneven heat transfer at a fixed position, thereby improving the uniformity of heating and reducing the phenomenon of local overheating or overcooling, thereby improving the processing quality and precision of the workpiece and reducing processing defects caused by uneven temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall bottom structure of the utility model.

[0017] The numbers in the figure are:

[0018] 1. Furnace body; 2. Furnace bottom; 201. Guide rail; 3. Furnace opening for taking out materials; 301. Furnace door; 4. Material rack; 5. Protective guardrail; 501. Fixed plate; 6. Support column; 601. Connecting block; 602. Reinforcement rod; 603. Guide wheel; 7. Burner platform; 701. Platform ladder; 702. Furnace top ladder; 8. Burner; 9. Hot air circulation fan; 10. Furnace top guardrail. DETAILED DESCRIPTION

[0019] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0020] Reference Figure 1-2 As shown, a circular spinning preheating furnace includes a furnace body 1, a furnace bottom 2, a material taking furnace opening 3, a material rack 4, a burner 8 and a hot air circulation fan 9:

[0021] The furnace body 1 is cylindrical. The furnace body 1 is cylindrical. The cylindrical structure is more compact than the rectangular structure, and can make more effective use of the plant space. It is particularly suitable for workplaces with limited space. It is also conducive to the uniform spread of heat, which can improve the heating uniformity of the workpiece and avoid excessive local temperature differences. The furnace body 1 is rotatably mounted on the upper end of the furnace bottom 2. Several groups of protective guardrails 5 and support columns 6 are fixedly connected to the outer side of the lower end of the furnace body 1. The furnace body 1 consists of a furnace shell, an inner tank and a furnace lining. The furnace shell is welded by channel steel and steel plate. Channel steel (120*50*5), steel plate - thickness 4mm.

[0022] Inner tank: It is made of SUS304 stainless steel plate, stainless steel angle steel and stainless steel channel steel. The guide plates are installed between the tops of the double-layer inner tank (i.e. the fire channel). Gas burner nozzles are installed above the space composed of SUS304 stainless steel, angle steel and channel steel on both sides. After the air is heated, it is forced to flow to the furnace space by the circulating fan to heat and keep the workpieces warm. The thickness of the stainless steel plate wrapped with the insulation material is 1.5mm, and the thickness of the stainless steel plate in the furnace (the visible layer in the furnace) is 1.5mm; the double-layer inner tank of the steel plate is densely spot-welded to the frame, which is strong and durable;

[0023] Furnace lining: It is made of aluminum silicate fiber felt and rock wool stacked and compacted. It is light in weight and has good thermal insulation performance, so that the inner tank has room to expand after heating; the thickness of the insulation material on the furnace side is 250mm, the thickness of the insulation material on the furnace top is 300mm, and the thickness of the insulation material on the furnace bottom is 200mm.

[0024] The furnace bottom 2 is cylindrical, and the bottom of the furnace bottom 2 is fixedly connected with a guide rail 201; the upper end of the furnace bottom is also provided with an inner tank and a lining, and the body is insulated by a castable, and the bottom material of the furnace bottom 2 is made of 18# channel steel; at the same time, the furnace bottom 2 is driven by a 1-inch double-row roller sprocket chain, and the driving turntable reducer has a power of 2.2KW and a reduction ratio of 1:150.

[0025] A charging furnace opening 3 is provided on the outside of the furnace body 1, and a furnace door 301 is rotatably mounted on the outer end of the charging furnace opening 3; three independent hole furnace doors are provided at the charging furnace opening 3, and the maximum opening angle of each furnace door is 110 degrees. A maintenance furnace door is provided on the back of the charging furnace opening 3 to facilitate equipment maintenance.

[0026] A material rack 4, wherein the material rack 4 is arranged inside the furnace body 1, and the lower end of the material rack 4 is fixedly connected to the upper end of the furnace bottom 2;

[0027] A burner 8, wherein the burner 8 is fixedly installed inside the furnace body 1, the lower end of the burner 8 is rotatably connected to the upper end of the furnace bottom 2, and the control end of the burner 8 is arranged at the outer end of the furnace body 1;

[0028] The hot air circulation fan 9 is fixedly installed at the top of the furnace body 1, and the hot air circulation mode of the hot air circulation fan 9 is an independent small circulation.

[0029] Specifically, in this embodiment, a fixing plate 501 is fixedly connected to the top of the protective guardrail 5 .

[0030] Specifically, in this embodiment, a reinforcing rod 602 is fixedly connected to the inner side of the bottom of the support column 6, and the other end of the reinforcing rod 602 is evenly fixedly connected to the connecting block 601. By using the central axis for axial and radial support, it is ensured that the turntable does not deviate or shake during rotation.

[0031] Specifically, in this embodiment, a guide wheel 603 is rotatably mounted on the upper end of the support column 6, and the upper end of the guide wheel 603 is movably connected to the guide rail 201. The furnace bottom 2 can be rotated by a motor drive, so that the workpieces on the internal material rack 4 are heated more evenly during the preheating process, avoiding the problem of uneven heat transfer at a fixed position, thereby improving the uniformity of heating, reducing the phenomenon of local overheating or overcooling, and further improving the processing quality and accuracy of the workpiece, and reducing processing defects caused by uneven temperature.

[0032] Specifically, in this embodiment, the protective guardrail 5 and the support columns 6 are evenly arranged in a ring shape, and the protective guardrail 5 and the support columns 6 are staggered.

[0033] Specifically, in this embodiment, a burner platform 7 is fixedly installed on the outer side of the furnace body 1, a platform ladder 701 is provided on the lower side of the burner platform 7, a furnace top ladder 702 is provided on the upper side of the burner platform 7, and the burner platform 7 is arranged on the lower side of the control end of the burner 8.

[0034] Specifically, in this embodiment, a furnace top guardrail 10 is fixedly connected to the top of the furnace body 1 .

[0035] The working principle of the utility model is as follows: a worker opens the furnace door 301, places the workpiece on the material rack 4 through the material taking furnace opening 3, then drives the furnace bottom 2 to rotate through the motor, and the furnace bottom 2 rotates to drive the material rack to rotate, so that the workpieces are placed on the material rack 4 in sequence, then closes the furnace door 301, starts the burner 8 and the hot air circulation fan 9, and starts to process the workpiece;

[0036] The furnace body 1 in the present device is cylindrical in shape. Compared with the rectangular structure, the cylindrical structure is more compact and can make more effective use of the plant space. It is particularly suitable for workplaces with limited space and is conducive to the uniform transmission of heat. It can improve the heating uniformity of the workpiece and avoid excessive local temperature differences. At the same time, the furnace bottom 2 can be rotated by a motor drive, so that the workpieces on the internal material rack 4 are heated more evenly during the preheating process, avoiding the problem of uneven heat transfer at a fixed position, thereby improving the uniformity of heating and reducing the phenomenon of local overheating or overcooling, thereby improving the processing quality and precision of the workpiece and reducing processing defects caused by uneven temperature.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A circular spinning preheating furnace, characterized in that: It comprises a furnace body (1), a furnace bottom (2), a material taking furnace opening (3), a material rack (4), a burner (8) and a hot air circulation fan (9): A furnace body (1), the furnace body (1) is cylindrical, the furnace body (1) is rotatably mounted on the upper end of the furnace bottom (2), and a plurality of groups of protective guardrails (5) and support columns (6) are fixedly connected to the outer side of the lower end of the furnace body (1); A furnace bottom (2), the furnace bottom (2) being cylindrical, and a guide rail (201) being fixedly connected to the bottom of the furnace bottom (2); A charging furnace opening (3), the charging furnace opening (3) being arranged on the outside of the furnace body (1), and a furnace door (301) being rotatably mounted on the outer end of the charging furnace opening (3); A material rack (4), the material rack (4) being arranged inside the furnace body (1), the lower end of the material rack (4) being fixedly connected to the upper end of the furnace bottom (2); A burner (8), the burner (8) being fixedly mounted inside the furnace body (1), the lower end of the burner (8) being rotatably connected to the upper end of the furnace bottom (2), and the control end of the burner (8) being arranged at the outer end of the furnace body (1); A hot air circulation fan (9), wherein the hot air circulation fan (9) is fixedly installed at the top of the furnace body (1), and the hot air circulation mode of the hot air circulation fan (9) is an independent small circulation.

2. A circular spinning preheating furnace according to claim 1, characterized in that: A fixing plate (501) is fixedly connected to the top end of the protective guardrail (5).

3. A circular spinning preheating furnace according to claim 1, characterized in that: A reinforcing rod (602) is fixedly connected to the inner side of the bottom of the support column (6), and the other end of the reinforcing rod (602) is evenly fixedly connected to a connecting block (601).

4. A circular spinning preheating furnace according to claim 1, characterized in that: A guide wheel (603) is rotatably mounted on the upper end of the support column (6), and the upper end of the guide wheel (603) is movably connected to the guide rail (201).

5. The circular spinning preheating furnace according to claim 1, characterized in that: The protective guardrail (5) and the support column (6) are both evenly arranged in a ring shape, and the protective guardrail (5) and the support column (6) are staggeredly arranged.

6. The circular spinning preheating furnace according to claim 1, characterized in that: A burner platform (7) is fixedly mounted on the outer side of the furnace body (1); a platform ladder (701) is arranged on the lower side of the burner platform (7); a furnace top ladder (702) is arranged on the upper side of the burner platform (7); and the burner platform (7) is arranged on the lower side of the control end of the burner (8).

7. The circular spinning preheating furnace according to claim 1, characterized in that: A furnace top guardrail (10) is fixedly connected to the top of the furnace body (1).

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