Heating furnace for forging

Abstract

The utility model discloses a heating furnace for forging, which comprises a heating furnace body and a burner, an exhaust chimney is arranged on the heating furnace body, a heat exchange box is arranged outside the heating furnace body, the heat exchange box is communicated with the exhaust chimney through a return pipe, a heat accumulator is arranged in the heat exchange box, an air inlet is arranged at one end of the heat accumulator, and an air outlet is arranged at the other end of the heat accumulator. And the other end of the heat accumulator is connected with an air supply pipe. The air supply pipe, the heat exchange box and the return pipe are arranged in the exhaust chimney, so that circulation of hot air after combustion is achieved, heat of the hot air exchanges heat with the heat accumulator in the heat exchange box, air entering the combustor is heated, the heated air is mixed with fuel in the combustor for combustion, and the combustion efficiency is improved. After the high-temperature air enters the combustor, the temperature in the combustor can be increased instantly, so that rapid temperature rise of the combustor is achieved, fuel consumption is reduced, combustion cost can be saved, recycling of waste heat of the heating furnace is improved, and great convenience is brought to production.

Description

Technical Field

[0001] The utility model relates to the technical field of heating furnaces, in particular to a heating furnace for forging. Background Art

[0002] In the metallurgical industry, a heating furnace is a device that heats materials or workpieces (usually metals) to rolling and forging temperatures. Heating furnaces are used in many industries such as petroleum, chemical industry, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemicals, and pharmaceuticals. A heating furnace generally includes a furnace body and a burner arranged on one side of the furnace body. Fuel is added to the burner and air is introduced for mixed combustion. The heat generated during combustion enters the interior of the heating furnace, thereby heating the workpiece. When the burner is working, air needs to be introduced from the outside. When cold air is mixed with the fuel for heating, a certain amount of heat will be lost during combustion due to the low temperature. In addition, the hot air generated after heating by the heating furnace is also discharged out of the chimney. The heat loss causes energy loss, which is not conducive to the control of burner costs. Utility Model Content

[0003] The purpose of the utility model is to avoid the deficiencies of the prior art and provide a heating furnace for forging, thereby effectively solving the deficiencies in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a heating furnace for forging, including a heating furnace body, a burner is arranged on one side of the heating furnace body, an exhaust chimney is also arranged on the heating furnace body, and a heat exchange box is also arranged on the side outside the heating furnace body. The hot exhaust gas in the exhaust chimney is transported to the heat exchange box via an air supply pipe, and the heat exchange box is also connected to the exhaust chimney through a reflux pipe. A heat accumulator is also arranged in the heat exchange box, and an air inlet is arranged at one end of the heat accumulator, and an air supply pipe is connected to the other end of the heat accumulator, and the air supply pipe is connected to the air inlet of the burner.

[0005] Furthermore, the heat accumulator includes hollow pipe joints at both ends of the heat exchange box, and a plurality of branch air pipes are evenly distributed between the pipe joints on both sides. The air inlet is connected to the pipe joint on one side, and the air supply pipe is connected to the pipe joint on the other side.

[0006] Furthermore, a plurality of heat exchange fins are evenly distributed on the surface of the split air pipe along the circumferential direction.

[0007] Furthermore, a drainage fan is provided on the air supply pipe.

[0008] Furthermore, a gas circuit one-way valve is provided on the reflux pipe.

[0009] Furthermore, the heating furnace body is evenly provided with a plurality of ceramic heat storage blocks on the inner wall of its combustion chamber.

[0010] Furthermore, a support seat is provided at the bottom of the heating furnace body.

[0011] The above-mentioned technical scheme of the utility model has the following beneficial effects: the utility model realizes the circulation of hot gas after combustion by arranging an air supply pipe, a heat exchange box and a return pipe in the exhaust chimney. The heat of the hot gas is exchanged with the heat accumulator in the heat exchange box, thereby heating the air entering the burner. The heated air is mixed with the fuel in the burner for combustion. After the high-temperature air enters the burner, the temperature in the burner can be instantly increased, thereby realizing rapid heating of the burner and reducing fuel consumption. This not only saves combustion costs, but also improves the recovery and utilization of waste heat from the heating furnace, bringing great convenience to production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main plan structure of an embodiment of the utility model;

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure inside the heat exchange box of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0015] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0016] like Figure 1-2 As shown, a heating furnace for forging described in this embodiment includes a heating furnace body 1, a burner 2 is arranged on one side of the heating furnace body 1, an exhaust chimney 3 is also arranged on the heating furnace body 1, and a heat exchange box 4 is also arranged on the side outside the heating furnace body 1. The hot exhaust gas in the exhaust chimney 3 is transported to the heat exchange box 4 via an air supply pipe 5, and the heat exchange box 4 is also connected to the exhaust chimney 3 through a reflux pipe 6. A heat accumulator 7 is also arranged in the heat exchange box 4, and an air inlet 8 is arranged at one end of the heat accumulator 7. The other end of the heat accumulator 7 is connected to an air supply pipe 9, and the air supply pipe 9 is connected to the air inlet of the burner 2.

[0017] The heat accumulator 7 includes hollow pipe joints 7a at both ends of the heat exchange box 4, and a number of diversion air pipes 7b are evenly distributed between the pipe joints 7a on both sides. The air inlet 8 is connected to the pipe joint 7a on one side, and the air supply pipe 9 is connected to the pipe joint 7a on the other side. The pipe joint 7a cooperates with the diversion organ 7b to divert the air, thereby increasing the heat exchange area of ​​the air and further improving the heat exchange rate.

[0018] A plurality of heat exchange fins 7c are evenly distributed along the circumferential direction on the surface of the split air pipe 7b, and the heat exchange fins 7c are used to improve the heat exchange efficiency of the split air pipe 7b.

[0019] The air supply pipe 5 is provided with an induced draft fan 10 , which is used to extract the hot air in the exhaust chimney 3 and transport it to the heat exchange box 4 through the air supply pipe 5 .

[0020] The return pipe 6 is provided with a gas circuit one-way valve 11 , and the gas circuit one-way valve 11 allows the heat exchange exhaust gas in the return pipe 6 to flow back to the exhaust chimney 3 in one direction.

[0021] The heating furnace body 1 is evenly provided with a plurality of ceramic heat storage blocks 12 on the inner wall of its combustion chamber. The ceramic heat storage blocks 12 are used to store the heat in the combustion chamber, thereby maintaining the temperature in the heating furnace body 1 and preventing the temperature from losing too quickly. When the burner 2 is started again, the temperature in the combustion chamber 2 can be quickly recovered, thereby saving energy consumption.

[0022] A support base 13 is provided at the bottom of the heating furnace body 2 .

[0023] The working principle of the utility model is as follows: a workpiece is placed inside a heating furnace body 1, and then the burner is started, and solid or gaseous fuel is placed inside the burner. At the same time, the burner introduces heated air through an air supply pipe 9. After the air and fuel are mixed and burned, the burning flame enters the interior of the heater body 1 for calcination, and the hot gas after combustion is discharged through an exhaust chimney 3. The induced draft fan 10 is started to draw out the hot exhaust gas in the exhaust chimney 3, and transported to the heat exchange box 4 through an air supply pipe 5, and then returned to the exhaust chimney 3 through a return pipe 6 on the other side of the heat exchange box 4. When the hot gas circulates in the heat exchange box 4, it will exchange heat with the heat accumulator 7. During the heat exchange process, air used for combustion of the burner will flow in at the air inlet 8, and then the air enters the heat accumulator 7 to exchange heat with the hot exhaust gas, thereby heating the air. The heated air is transported to the burner through an air supply pipe 9, and the hot air enters the burner, which can achieve rapid heating of the burner, reduce fuel consumption, and thus reduce combustion costs.

[0024] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A heating furnace for forging, characterized in that: It includes a heating furnace body, a burner is arranged on one side of the heating furnace body, an exhaust chimney is also arranged on the heating furnace body, and a heat exchange box is also arranged on the side outside the heating furnace body. The hot exhaust gas in the exhaust chimney is transported to the heat exchange box via an air supply pipe, and the heat exchange box is also connected to the exhaust chimney through a return pipe. A heat accumulator is also arranged in the heat exchange box, an air inlet is arranged at one end of the heat accumulator, and an air supply pipe is connected to the air inlet of the burner at the other end of the heat accumulator.

2. A heating furnace for forging according to claim 1, characterized in that: The heat accumulator includes hollow pipe joints at both ends of the heat exchange box, and a plurality of branch air pipes are evenly distributed between the pipe joints on both sides. The air inlet is connected to the pipe joint on one side, and the air supply pipe is connected to the pipe joint on the other side.

3. A heating furnace for forging according to claim 2, characterized in that: A plurality of heat exchange fins are evenly distributed along the circumferential direction on the surface of the split air pipe.

4. A heating furnace for forging according to claim 1, characterized in that: The air supply pipe is provided with a drainage fan.

5. A heating furnace for forging according to claim 1, characterized in that: The reflux pipe is provided with a gas path one-way valve.

6. A heating furnace for forging according to claim 1, characterized in that: The heating furnace body has a plurality of ceramic heat storage blocks evenly arranged on the inner wall of the combustion chamber thereof.

7. A heating furnace for forging according to claim 1, characterized in that: A supporting seat is arranged at the bottom of the heating furnace body.

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