Air guide structure of bell-type furnace

Abstract

The utility model provides an air guide structure of a bell-type furnace, which belongs to the field of annealing process equipment and comprises an annular coil base and a fan arranged on the inner ring of the coil base, and a furnace cover is sleeved outside the coil base; the furnace platform comprises a lower air guide seat and a plurality of air guide corners surrounding the lower air guide seat, airflow passes through air guide channels formed between every two adjacent air guide corners, the air guide channels are distributed in a vortex shape, the interiors of the air guide corners are arranged in a hollow mode along the side wall shape to form cavities, and heat preservation materials are arranged in the cavities. The furnace cover has the beneficial effects that air flow in the furnace cover flows uniformly, the temperature of a high-temperature workpiece can be uniform, the performance of an annealing process is improved, and the loss of the air guide angle caused by rapid temperature rise through the air flow after the heat of the workpiece is rapidly transferred to the air guide angle is also avoided.

Description

Technical Field

[0001] The utility model belongs to the field of annealing process equipment, in particular to an air guide structure of a bell-type furnace. Background Art

[0002] Annealing is required in the production process of cast steel parts, which is a heat treatment process in which the workpiece is kept at a high temperature for a period of time and then slowly cooled.

[0003] The wind guide angle of the existing bell-type furnace is an isosceles triangle. Its structure is wrapped with iron sheets on the outside and filled with high-temperature resistant cement inside. The lower wind guide seat is made of heat-resistant steel straight plate, but it has the following defects:

[0004] 1. The air guide angle is an isosceles triangle, and the air guide channel between the two air guide angles gradually narrows, which makes it impossible for the air flow to flow evenly, and thus the heat energy cannot be evenly distributed. The temperature of the workpiece is uneven, and the quality of the annealing treatment cannot be guaranteed.

[0005] 2. After long-term use, the heat energy of the high-temperature workpiece is quickly transferred to the wind guide angle and the lower wind guide seat through the airflow generated by the fan, which increases the temperature of the wind guide angle and the lower wind guide seat, causing cement to break, external iron sheet to deform, etc., reducing the service life of the wind guide angle and the lower wind guide seat in the bell-type furnace. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a hood-type furnace air guide structure, in which the airflow in the furnace hood flows evenly, which can even out the temperature of high-temperature workpieces, improve the performance of the annealing process, and avoid the loss of the air guide angle caused by the workpiece heat being quickly transferred to the air guide angle and then rapidly heated up by the airflow.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a hood-type furnace air guide structure, comprising an annular furnace table and a fan arranged in the inner circle of the furnace table, and a furnace hood is arranged on the outer shell of the furnace table;

[0008] The furnace table comprises a lower air guide seat and a plurality of air guide angles surrounding the lower air guide seat, and the air flow passes through an air guide channel formed between two adjacent air guide angles, and the plurality of air guide channels are distributed in a vortex shape.

[0009] Furthermore, the lower air guide seat is inclined upward from the inside and the outside to guide the airflow to rise from the air guide channel.

[0010] Furthermore, the wind guide angle is vertically arranged on the lower wind guide seat, and the two side walls of the wind guide angle expand outward from the end close to the fan and have an arc, so that the guiding surfaces of the two side walls are both arc surfaces.

[0011] Furthermore, the interior of the wind guide angle is hollowed out along the side wall to form a cavity, and a heat-insulating material is arranged in the cavity.

[0012] Furthermore, an upper air guide seat is arranged at the top of the furnace cover, and the upper air guide seat is in an inverted cone shape for guiding the air flow downward.

[0013] Furthermore, it comprises a base, the stove table and the fan are both arranged on the base, the fan is located in the center of the base, and the stove cover is sleeved on the base.

[0014] Furthermore, the wind guide angle is made of cast heat-resistant steel.

[0015] Furthermore, the lower air guide seat is made of heat-resistant bricks.

[0016] The advantages and positive effects of the utility model are:

[0017] 1. Due to the adoption of the above technical solution, the wind guide angle adopts a curved side wall, which makes the width of the wind guide channel formed between two adjacent wind guide angles wider, increases the amount of air flow, and is more conducive to the flow of air driven by the fan, so that the air flow spirals up in the furnace cover and fully contacts with the workpiece;

[0018] Multiple air guide channels are vortex-shaped, guiding the airflow to be evenly dispersed. The lower air guide seat is tilted upward with an arc from the inside to the outside, guiding the airflow to rise while reducing resistance. The upper air guide seat can guide the passing airflow downward, reducing resistance and allowing the airflow to circulate back and forth in the furnace cover to make the temperature of the workpiece uniform.

[0019] 2. The whole air guide angle is made of cast heat-resistant steel, which ensures the service life of the air guide angle. The air guide angle is hollow inside, and the insulation material filled in it prevents the temperature from being quickly transmitted to the furnace table through the air guide angle. The lower air guide seat is made of heat-resistant bricks. Compared with the traditional heat-resistant steel straight plate, it ensures strength while reducing the heat energy dispersion speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a top view of the furnace of the utility model;

[0022] Figure 3 It is a schematic diagram of the stove structure of the utility model.

[0023] In the figure:

[0024] 1. Furnace cover; 2. Furnace table; 21. Lower air guide seat; 22. Air guide angle; 23. Insulation material; 24. Air guide channel; 3. Upper air guide seat; 4. Fan; 5. Base. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with embodiments and drawings.

[0026] like Figures 1 to 3 As shown, this embodiment provides a bell-type furnace air guide structure, comprising a ring-shaped furnace platform 2 and a fan 4 arranged on the inner circle of the furnace platform 2, and a furnace hood 1 is arranged outside the furnace platform 2;

[0027] The furnace cover 1 is sleeved on the base 5 . The furnace table 2 and the fan 4 are both arranged on the base 5 . The fan 4 is located at the center of the base 5 .

[0028] The stove table 2 includes a ring-shaped lower air guide seat 21 and a plurality of equally spaced air guide angles 22 surrounding the lower air guide seat 21. An air guide channel 24 is formed between two adjacent air guide angles 22. The airflow generated by the fan 4 passes through the air guide channel 24. The plurality of air guide channels 24 are distributed in a vortex shape.

[0029] Multiple air guide angles 22 are vertically arranged on the lower air guide seat 21, and the upper planes of the multiple air guide angles 22 are located in the same horizontal plane. The two side walls of the air guide angles 22 expand outward from the end close to the fan 4 in a fan shape, and both side walls are guiding surfaces with arcs in the same direction, so that the airflow is evenly dispersed.

[0030] The lower air guide seat 21 is inclined upward from the inside to the outside with an arc, and is used to guide the airflow generated by the fan 4 to be transported upward from the air guide channel 24, and the lower air guide seat 21 is made of heat-resistant bricks.

[0031] In order to prevent the heat transferred from the workpiece to the air guide angle 22 from being quickly conducted to the furnace table 2, the interior of the air guide angle 22 is hollow along the side wall shape to form a cavity inside, and a heat-insulating material 23 is arranged in the cavity. The air guide angle 22 is made of cast heat-resistant steel to increase its high-temperature strength. In this embodiment, the heat-insulating material 23 is heat-insulating cotton.

[0032] An upper air guide seat 3 is arranged at the top of the furnace cover 1. The upper air guide seat 3 is in the shape of an inverted cone with an arc, and the arc is concave inward to guide the passing airflow downward.

[0033] The working process of this example:

[0034] The workpieces are stacked on the support frame in sequence, and the support frame is placed flat on multiple air guide angles 22. The airflow generated by the fan 4 is broken up by the ends of the air guide angles 22 and introduced into the air guide channel 24. The lower air guide seat 21 guides the airflow upward. The airflow is guided by the lower air guide seat 21 and the air guide channel 24 to spiral upward until it contacts the upper air guide seat 3. The airflow is then guided downward and circulates back and forth in the furnace hood 1 until the annealing of the workpiece is completed.

[0035] The above describes one or more embodiments of the utility model in detail, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model shall still fall within the scope of the patent coverage of the utility model.

Claims

1. A bell-type furnace air guide structure, characterized in that: It comprises an annular furnace table (2) and a fan (4) arranged on the inner circle of the furnace table (2), and a furnace cover (1) is arranged on the outer shell of the furnace table (2); The furnace table (2) comprises a lower air guide seat (21) and a plurality of air guide angles (22) surrounding the lower air guide seat (21); air flow passes through an air guide channel (24) formed between two adjacent air guide angles (22); and the plurality of air guide channels (24) are distributed in a vortex shape.

2. The bell-type furnace air guide structure according to claim 1, characterized in that: The lower air guide seat (21) is inclined upward from the inside and the outside, and is used to guide the air flow to rise from the air guide channel (24).

3. The bell-type furnace air guide structure according to claim 1, characterized in that: The wind guide angle (22) is vertically arranged on the lower wind guide seat (21), and the two side walls of the wind guide angle (22) are extended outward from the end close to the fan (4) and have an arc, so that the guiding surfaces of the two side walls are both arc surfaces.

4. The bell-type furnace air guide structure according to claim 1, characterized in that: The interior of the wind guide angle (22) is hollowed out along the side wall to form a cavity, and a heat-insulating material (23) is arranged in the cavity.

5. The bell-type furnace air guide structure according to claim 1, characterized in that: An upper air guide seat (3) is arranged at the top of the furnace cover (1); the upper air guide seat (3) is in an inverted cone shape and is used to guide air flow downward.

6. The bell-type furnace air guide structure according to claim 1, characterized in that: It comprises a base (5), the furnace table (2) and the fan (4) are both arranged on the base (5), the fan (4) is located at the center of the base (5), and the furnace cover (1) is sleeved on the base (5).

7. The bell-type furnace air guide structure according to claim 1, characterized in that: The wind guide angle (22) is made of cast heat-resistant steel.

8. The bell-type furnace air guide structure according to claim 1, characterized in that: The lower air guide seat (21) is made of heat-resistant bricks.

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