Well type resistance furnace with hot air circulation function

Abstract

The utility model discloses a pit type resistance furnace with a hot air circulation function, which relates to the technical field of heating equipment and comprises a furnace body and a furnace cover, a heating cavity is arranged in the furnace body, a ventilating duct is mounted in the heating cavity, a connecting disc is fixedly connected to the top of the ventilating duct, and a fan is arranged in the furnace cover. The top of the connecting disc is arranged at an air outlet in the edge of the bottom of the fan, a heat insulation material is jointly arranged between the inner side wall of the furnace body and the heating cavity, and heating devices are evenly installed on the inner side wall of the ventilation pipeline. According to the utility model, the heating devices are uniformly arranged on the inner side wall of the ventilation pipeline, and the spiral pipeline and the fan are arranged, so that each part of a heated object can be uniformly heated, the heating quality is improved, and the ceramic fiber heat insulation material is arranged between the inner side wall of the furnace body and the heating cavity, so that the loss of heat to the external environment is effectively reduced; the energy utilization efficiency is improved, the hot air circulation path is optimized through the arrangement of the spiral pipeline, and uniform regulation and control over the temperature in the furnace are better achieved.

Description

Technical Field

[0001] This utility model relates to the field of heating equipment technology, and in particular to a well-type resistance furnace with hot air circulation function. Background Technology

[0002] Pit-type resistance furnaces have wide applications in modern industrial production, playing a crucial role, especially in metal heat treatment, ceramic sintering, and powder metallurgy. They provide a stable and precisely controllable high-temperature environment for material processing, generating heat through the flow of electric current through the resistance heating element to meet the temperature requirements of various processes, thus having a vital impact on improving material properties and product quality.

[0003] According to Chinese Patent Publication No. 202221147468.X, a high-temperature heating furnace with uniform heating is disclosed, including a furnace cover, a furnace body, and a furnace bottom. The furnace cover, furnace body, and furnace bottom are sequentially sealed and locked together by bolts from top to bottom. The furnace cover, furnace body, and furnace bottom are all double-layered structures, and their cavities are filled with a polyester insulation layer. A support platform is installed on the lower part of the outer wall of the furnace body through a large-diameter bearing. A discharge mechanism is provided on one side of the bottom of the furnace bottom, and an electric heater is inserted into the bottom of the furnace bottom. A motor and an F-shaped bracket are fixed on one side of the upper surface of the support platform. The motor is located inside the F-shaped bracket, and a vertically rotating device is mounted on the F-shaped bracket. The device is equipped with a drive shaft, the bottom end of which is connected to the motor shaft of a motor. A spur gear pair is installed between the lower outer wall of the drive shaft and the outer wall of the furnace body. A feed pipe is rotatably inserted into the center of the top of the furnace cover. Several uniformly spaced circular stirring nets extending into the lower part of the furnace body are fixed to the lower outer wall of the feed pipe. Several uniformly spaced scrapers are fixed to the inner wall of the furnace body. An L-shaped vent pipe is provided on the outer side of the top of the furnace cover. The outer wall of the feed pipe is connected to the upper outer wall of the drive shaft via a sprocket and chain assembly. The above device uses an electric heater to uniformly heat the items inside, improving the heating efficiency of the device. However, in actual use, although the goal is uniform heating, due to the imperfect uniform distribution of the electric heater and the characteristics of heat transfer, heat concentration can easily occur in certain local areas, resulting in localized overheating, which can adversely affect the performance and quality of the heated object.

[0004] In view of this, the present invention is proposed to solve the above-mentioned technical problems. Utility Model Content

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A well-type resistance furnace with hot air circulation function consists of a furnace body and a furnace cover. The furnace body has a heating chamber inside, and a ventilation duct is installed inside the heating chamber. A connecting plate is fixed to the top of the ventilation duct. A fan is installed inside the furnace cover. The top of the connecting plate is located at the air outlet at the bottom edge of the fan. A heat insulation material is provided between the inner wall of the furnace body and the heating chamber. Heating devices are evenly installed on the inner wall of the ventilation duct.

[0007] A further preferred embodiment is that the ventilation duct has a spiral pipe inside, and the air inlet end of the spiral pipe is snapped into the bottom of the connecting plate.

[0008] More preferably, the exhaust end of the spiral pipe is installed at the bottom of the furnace body, and exhaust ports are provided at equal intervals along the circumferential direction at the edge of the bottom of the furnace body.

[0009] A further preferred embodiment is that a sealing plate is installed at the bottom of the connecting plate, and the sealing plate has a connection port of a size that corresponds to the air inlet end position at the top of the spiral pipe.

[0010] A further preferred embodiment is that a mounting bracket is fixedly connected to the bottom of the furnace body, the mounting bracket having a multi-layered structure, and the heating element surrounding the mounting bracket.

[0011] More preferably, the heating device is connected to an external power source via a wire, and the power source provides electrical energy to the heating device, causing the heating device to generate heat.

[0012] Compared with the prior art, this utility model has the following advantages: by uniformly installing heating devices on the inner wall of the ventilation duct and setting up a spiral pipe and a fan, the heated object can be heated evenly in all parts, thereby improving the heating quality. The ceramic fiber insulation material set between the inner wall of the furnace body and the heating chamber effectively reduces the loss of heat to the external environment and improves energy utilization efficiency. The setting of the spiral pipe optimizes the hot air circulation path, so that the hot air goes from the connecting plate through the spiral pipe to the bottom of the furnace body, and then is discharged from the exhaust port at the bottom edge of the furnace body, forming an efficient circulation, improving the circulation efficiency of the hot air in the furnace, and better realizing the uniform control of the furnace temperature. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0014] Figure 2 This is a schematic diagram of the fan and ventilation duct structure in this embodiment;

[0015] Figure 3 This is a schematic diagram of the spiral pipe structure in this embodiment;

[0016] Figure 4 This is a schematic diagram of the mounting bracket installation structure in this embodiment.

[0017] Reference numerals: 1. Furnace body; 2. Heating chamber; 3. Furnace cover; 4. Fan; 5. Ventilation duct; 6. Connecting plate; 7. Spiral duct; 8. Heating device; 9. Insulation material; 10. Mounting bracket. Detailed Implementation

[0018] A prior art high-temperature heating furnace for uniform heating includes a furnace cover, a furnace body, and a furnace bottom. The furnace cover, furnace body, and furnace bottom are sequentially sealed and engaged from top to bottom by bolts. All three components have a double-layer structure with cavities filled with a polyester insulation layer. A support platform is mounted on the lower part of the outer wall of the furnace body via a large-diameter bearing. A discharge mechanism is provided on one side of the bottom of the furnace bottom, and an electric heater is inserted into the bottom of the furnace bottom. A motor and an F-shaped bracket are fixed to one side of the upper surface of the support platform. The motor is located inside the F-shaped bracket, and a drive shaft is vertically rotatably mounted on the F-shaped bracket. The bottom end of the shaft is connected to the motor shaft of the motor. A spur gear pair is installed between the lower outer wall of the drive shaft and the outer wall of the furnace body. A feed pipe is rotatably inserted into the center of the top of the furnace cover. Several stirring nets extending into the lower cavity of the furnace body are evenly spaced and fixed in a circular pattern on the lower outer wall of the feed pipe. Several scrapers are evenly spaced and fixed on the inner wall of the furnace body. An L-shaped vent pipe is provided on the outer side of the top of the furnace cover. The outer wall of the feed pipe is connected to the upper outer wall of the drive shaft through a sprocket and chain assembly. The above device uses an electric heater to uniformly heat the items inside, improving the heating efficiency of the device. However, in actual use, although the goal is uniform heating, due to the imperfect uniform distribution of the electric heater and the characteristics of heat transfer, heat concentration can easily occur in certain local areas, resulting in local overheating, which can adversely affect the performance and quality of the heated object.

[0019] In response to the above-mentioned technical problems, this application has made the following design and concept: In order to solve the problems existing in the prior art, it is envisioned that a certain airflow circulation mechanism has a better hot air circulation effect than the electric heater in the prior art, so as to achieve the purpose of hot air circulation.

[0020] The following is combined with Figures 1 to 4 This utility model will be described in further detail.

[0021] A type of well-type resistance furnace with hot air circulation function, such as Figure 1As shown, the furnace consists of a furnace body 1 and a furnace cover 3. The furnace body 1 has a heating chamber 2 inside. Further, the furnace body 1 is a cylindrical structure made of high-temperature resistant and corrosion-resistant metal material. Further, the heating chamber 2 provides space for internal heating and hot air circulation. A ventilation duct 5 is installed inside the heating chamber 2. A connecting plate 6 is fixed to the top of the ventilation duct 5. A fan 4 is installed inside the furnace cover 3. The top of the connecting plate 6 is located at the air outlet at the bottom edge of the fan 4. A heat insulation material 9 is provided between the inner wall of the furnace body 1 and the heating chamber 2. Heating devices 8 are evenly installed on the inner wall of the ventilation duct 5.

[0022] By uniformly installing heating devices 8 on the inner wall of the ventilation duct 5 and setting up a spiral duct 7 and a fan 4, the heated object can be heated evenly in all parts, thereby improving the heating quality. Ceramic fiber insulation material 9 is set between the inner wall of the furnace body 1 and the heating chamber 2. For example, the insulation material 9 can be ceramic fiber, which reduces heat loss to the external environment and effectively reduces heat loss to the external environment, thereby improving energy utilization efficiency. The setting of the spiral duct 7 optimizes the hot air circulation path, so that the hot air goes from the connecting plate 6 through the spiral duct 7 to the bottom of the furnace body 1, and then is discharged from the exhaust port at the bottom edge of the furnace body 1, forming an efficient circulation, improving the circulation efficiency of the hot air in the furnace 1, and better realizing the uniform control of the furnace temperature.

[0023] Specifically, if Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, a spiral pipe 7 is installed inside the ventilation duct 5. The air inlet end of the spiral pipe 7 is snapped into the bottom of the connecting plate 6. Furthermore, when in use, the airflow generated by the fan 4 enters the spiral pipe 7 through the connecting plate 6. The spiral pipe 7 then increases the contact area and contact time between the airflow and the heating chamber 2, further improving the heating effect of the device.

[0024] Specifically, if Figure 3 and Figure 4 As shown, the air outlet at the bottom of the spiral pipe 7 is installed at the inner bottom of the furnace body 1, and exhaust ports are evenly spaced along the circumferential direction at the edge of the inner bottom of the furnace body 1. In use, the airflow discharged through the exhaust ports is ejected at the edge of the inner bottom of the furnace body 1, flows downward through the middle part of the fan 4 to the middle part of the inner bottom of the furnace body 1, so that the two airflows are staggered, extending the flow path of the airflow inside the heating chamber 2, thereby improving the airflow circulation effect, reducing heat loss, reducing energy consumption, and saving production costs.

[0025] Specifically, if Figure 3As shown, a sealing plate is installed at the bottom of the connecting plate 6. The sealing plate has a connection port of a suitable size that corresponds to the air inlet end of the spiral pipe 7 at the top. Furthermore, during use, part of the airflow generated by the fan 4 enters the spiral pipe 7 inside the ventilation pipe 5 through the connecting plate 6, and the other part flows vertically into the heating chamber 2. Furthermore, the sealing plate ensures the airtightness of the hot air circulation, ensuring that the temperature and atmosphere inside the furnace are not disturbed by the outside.

[0026] Specifically, if Figure 1 and Figure 4 As shown, a mounting bracket 10 is fixed to the bottom of the furnace body 1. The mounting bracket 10 has a multi-layer structure, and the heating device 8 is surrounded around the mounting bracket 10, which further improves the space utilization rate. The mounting bracket 10 also has good high temperature resistance and load-bearing capacity.

[0027] Specifically, if Figure 1 and Figure 3 As shown, the heating device 8 is connected to an external power source via wires. The power source provides electrical energy to the heating device 8, causing it to generate heat.

[0028] Working principle

[0029] In use, the component to be heated is placed on the mounting bracket 10, and the power is turned on to the fan 4 and the heating device 8. Then, the furnace cover 3 is placed on top of the furnace body 1, and the fan 4 is started to drive the airflow. Part of the airflow from the fan 4 enters the connecting plate 6, then enters the spiral pipe 7 through the connecting plate 6, and finally is ejected from the exhaust port at the bottom edge of the furnace body 1. The other part of the airflow from the fan 4 flows vertically into the heating chamber 2. At this time, the heating device 8 is started to generate heat, which heats the inside of the ventilation pipe 5 and the inside of the heating chamber 2. This makes the airflow inside the spiral pipe 7 and the heating chamber 2 both high-temperature gas. As a result, the two airflows are staggered, extending the flow path of the airflow inside the heating chamber 2, thereby improving the airflow circulation effect and reducing heat loss.

[0030] This specific embodiment is merely an explanation of the utility model and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection of this utility model.

Claims

1. A well-type resistance furnace with hot air circulation function, comprising a furnace body (1) and a furnace cover (3), characterized in that, The furnace body (1) is provided with a heating chamber (2), and a ventilation duct (5) is installed inside the heating chamber (2). A connecting plate (6) is fixed to the top of the ventilation duct (5). A fan (4) is provided inside the furnace cover (3). The top of the connecting plate (6) is located at the air outlet at the bottom edge of the fan (4). A heat insulation material (9) is provided between the inner wall of the furnace body (1) and the heating chamber (2). Heating devices (8) are evenly installed on the inner wall of the ventilation duct (5).

2. The well-type resistance furnace with hot air circulation function according to claim 1, characterized in that, The ventilation duct (5) is equipped with a spiral duct (7) inside, and the air inlet end of the top of the spiral duct (7) is snapped into the bottom of the connecting plate (6).

3. The well-type resistance furnace with hot air circulation function according to claim 2, characterized in that, The exhaust end of the spiral pipe (7) is installed at the bottom of the furnace body (1), and exhaust ports are provided at equal intervals along the circumferential direction at the edge of the bottom of the furnace body (1).

4. The well-type resistance furnace with hot air circulation function according to claim 2, characterized in that, A sealing plate is installed at the bottom of the connecting plate (6), and the sealing plate is provided with a connection port of a size that is adapted to the air inlet end position at the top of the spiral pipe (7).

5. The well-type resistance furnace with hot air circulation function according to claim 1, characterized in that, The furnace body (1) is fixed to the bottom of the inner part with a mounting bracket (10). The mounting bracket (10) has a multi-layer structure, and the heating device (8) surrounds the mounting bracket (10).

6. The well-type resistance furnace with hot air circulation function according to claim 1, characterized in that, The heating device (8) is connected to an external power source via a wire. The power source provides electrical energy to the heating device (8), causing the heating device (8) to generate heat.

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