Nitrogen protection box type silicon carbide powder preheating furnace with uniform heating function

Abstract

The utility model belongs to the technical field of silicon carbide powder preheating furnaces, and particularly relates to a uniform-heating nitrogen protection box type silicon carbide powder preheating furnace which comprises a furnace bottom plate, a furnace shell is arranged on the furnace bottom plate, a furnace lining is arranged in the furnace shell, a furnace door is arranged on the furnace shell, and a furnace door heating element is arranged on the furnace door. And a furnace door sealing packing is arranged on the furnace door and is in contact with the furnace shell. The whole shell is formed by tightly welding the profile steel plates, the periphery of the furnace door is sealed by the packing and screwed through the hand wheel, and the air tightness is effectively guaranteed. Therefore, external air is prevented from entering the furnace to react with the silicon carbide powder, the preheating environment is ensured to be pure, and oxidation reaction is avoided. The heating elements are arranged on five faces and cover the two sides, the rear wall, the furnace bottom and the furnace door, heat in the furnace is evenly distributed, uneven preheating of silicon carbide powder can be avoided, and the overall preheating quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of silicon carbide powder preheating furnaces, specifically a nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating. Background Technology

[0002] The nitrogen-protected box-type silicon carbide powder preheating furnace is an advanced piece of equipment specifically designed for preheating silicon carbide powder. Its box-type structure provides a relatively closed and stable preheating environment for the silicon carbide powder. Nitrogen protection is a key feature; during preheating, nitrogen is introduced into the furnace to effectively isolate it from air, preventing oxidation of the silicon carbide powder at high temperatures and ensuring its purity and quality remain unaffected. The furnace has a precise temperature control system that accurately maintains the furnace temperature within a set range, meeting the stringent preheating temperature requirements of various processes. The rapid and uniform heating speed allows the silicon carbide powder to reach the ideal preheating state in a short time, improving production efficiency. Furthermore, the equipment boasts excellent sealing and safety features, and is relatively easy to operate. In the chemical and materials industries, the nitrogen-protected box-type silicon carbide powder preheating furnace provides a reliable pretreatment guarantee for subsequent processing of silicon carbide powder.

[0003] However, in practical use, the nitrogen-protected box-type silicon carbide powder preheating furnace has some issues that urgently need improvement in terms of airtightness and furnace temperature uniformity. Regarding airtightness, despite the sealing design, nitrogen leakage may still occur during actual operation, leading to an unstable protective atmosphere inside the furnace and affecting the preheating effect of the silicon carbide powder. As for furnace temperature uniformity, factors such as the layout of the heating elements and the heat conduction method result in significant temperature differences at different locations within the furnace, making it impossible to guarantee uniform heating of the silicon carbide powder. Utility Model Content

[0004] The purpose of this invention is to provide a nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating, which solves the problems of poor airtightness and furnace temperature uniformity in nitrogen-protected box-type silicon carbide powder preheating furnaces, and inconvenience in use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating, comprising a furnace bottom plate, a furnace shell on the furnace bottom plate, a furnace lining inside the furnace shell, a furnace door on the furnace shell, a furnace door heating element on the furnace door, a furnace door sealing packing on the furnace door, the furnace door sealing packing contacting the furnace shell, a thermocouple on the furnace shell, a manual ball valve one on the furnace shell, furnace chamber heating elements on both sides inside the furnace lining, a material frame on the furnace chamber heating elements, a material frame on the material frame, a furnace bottom heating element on the furnace bottom plate, a handwheel on the furnace shell, a manual ball valve two on the furnace shell, a flow meter on the manual ball valve two, and a furnace door rotating shaft on the furnace door, the furnace door rotating shaft being fixedly connected to the furnace shell.

[0006] Preferably, the furnace bottom heating element is an electric heating wire element, which achieves uniform heating through precise current control.

[0007] Preferably, the manual ball valve is made of stainless steel, which can effectively prevent high-temperature gas leakage.

[0008] Preferably, the furnace door heating element is a quartz tube heating element, used to prevent condensation on the furnace door during use.

[0009] Preferably, the material frame is an adjustable design, which facilitates adjustment according to different batches of silicon carbide powder.

[0010] Preferably, the furnace door hinge is made of a high-temperature resistant alloy material, which has high wear resistance and corrosion resistance.

[0011] Preferably, the heating elements on both sides of the furnace adopt a segmented heating design, which can adjust the heating power as needed to ensure uniform temperature distribution.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model uses welded steel plates to form an integral shell, and the furnace door is sealed around its perimeter with packing and tightened by handwheel, effectively ensuring airtightness. This prevents outside air from entering the furnace and reacting with the silicon carbide powder, ensuring a pure preheating environment, which is crucial for avoiding oxidation. The heating elements are arranged on five sides, covering the sides, rear wall, furnace bottom, and furnace door, ensuring uniform heat distribution within the furnace and preventing uneven preheating of the silicon carbide powder, thus ensuring overall preheating quality.

[0014] 2. This invention allows nitrogen to flow in and out of the furnace body from specific locations, with the intake volume regulated by a ball valve and flow meter in the intake pipe. This enables precise control of the nitrogen flow rate according to actual needs, providing a stable and suitable nitrogen protective atmosphere for the silicon carbide powder, which helps improve the consistency and stability of the preheating effect. The material frame and material rack are welded from high-quality stainless steel, making them lightweight and easy to handle; an adult can easily pick up a single frame of silicon carbide powder. Furthermore, the material frame is divided into three sections and placed layer by layer on the material rack, using one frame of silicon carbide powder at a time. This design facilitates the use and management of silicon carbide powder, improving operational convenience and efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 3 .

[0018] In the diagram: 1. Furnace bottom plate; 2. Furnace door; 3. Furnace door heating element; 4. Furnace door sealing packing; 5. Thermocouple; 6. Manual ball valve one; 7. Furnace shell; 8. Furnace lining; 9. Heating elements on both sides of the furnace chamber; 10. Material frame; 11. Furnace bottom heating element; 12. Handwheel; 13. Material frame; 14. Manual ball valve two; 15. Flow meter; 16. Furnace door pivot. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 A nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating includes a furnace bottom plate 1, a furnace shell 7 on the furnace bottom plate 1, a furnace lining 8 inside the furnace shell 7, a furnace door 2 on the furnace shell 7, a furnace door heating element 3 on the furnace door 2, the furnace door heating element 3 being a quartz tube heating element used to prevent condensation on the furnace door during use, a furnace door sealing packing 4 on the furnace door 2, the furnace door sealing packing 4 contacting the furnace shell 7, and a thermocouple 5 on the furnace shell 7.

[0021] Please see Figure 2-3The furnace shell 7 is equipped with a manual ball valve 6, which is made of stainless steel and can effectively prevent high-temperature gas leakage. The furnace lining 8 is equipped with heating elements 9 on both sides of the furnace chamber. The heating elements 9 on both sides of the furnace chamber adopt a segmented heating design, which can adjust the heating power as needed to ensure uniform temperature distribution. The heating elements 9 on both sides of the furnace chamber are equipped with a material frame 10, which is an adjustable design to facilitate adjustment according to different batches of silicon carbide powder.

[0022] Please see Figure 2-3 A material frame 13 is provided on the material frame 10, and a furnace bottom heating element 11 is provided on the furnace bottom plate 1. The furnace bottom heating element 11 is an electric heating wire heating element, which achieves uniform heating through precise current control. A handwheel 12 is provided on the furnace shell 7, and a manual ball valve 14 is provided on the furnace shell 7. A flow meter 15 is provided on the manual ball valve 14. A furnace door pivot 16 is provided on the furnace door 2. The furnace door pivot 16 is fixedly connected to the furnace shell 7. The furnace door pivot 16 is made of high temperature resistant alloy material, which has high wear resistance and corrosion resistance.

[0023] The specific implementation process of this utility model is as follows: When in use, adjust the position of the material frame 10 according to the usage requirements to adapt to different batches of silicon carbide powder, open the furnace door 2, use the handwheel 12 to loosen the furnace door sealing packing 4, put a fixed amount of silicon carbide powder into the material frame 13, and then put the material frame 13 into different layers in the material frame 10 in sequence, close the furnace door 2, tighten the handwheel 12 to ensure good sealing;

[0024] Open the manual ball valve 6 and slowly adjust the flow meter 15 to ensure that nitrogen flows in from the lower left corner and out from the upper right rear. Observe the flow meter 15 to ensure that the nitrogen flow is stable to form a stable protective environment. Set the furnace temperature according to the preset temperature curve and turn on the power. The furnace bottom heating element 11, the furnace side heating elements 9, and the furnace door heating element 3 gradually increase the temperature. Due to the segmented heating design, the power of each heating element can be adjusted independently to ensure uniform furnace temperature distribution. The temperature is monitored in real time through the thermocouple 5, and the current control is adjusted to make the heating process uniform and stable. When the silicon carbide powder reaches the set temperature and is maintained for a certain period of time, the heating is stopped and the temperature is gradually reduced to prevent thermal stress from damaging the material.

[0025] Turn off the power, wait for the temperature to drop to a safe range, turn off the nitrogen supply, and after ensuring that the gas in the furnace is stable, slowly release the handwheel 12, open the furnace door 2, use protective tools to remove the material frame 13, and move the material frame 13 to the designated cooling area to avoid high temperature causing harm to the human body.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating, comprising a furnace bottom plate (1), characterized in that: A furnace shell (7) is provided on the furnace bottom plate (1). A furnace lining (8) is provided inside the furnace shell (7). A furnace door (2) is provided on the furnace shell (7). A furnace door heating element (3) is provided on the furnace door (2). A furnace door sealing packing (4) is provided on the furnace door (2). The furnace door sealing packing (4) is in contact with the furnace shell (7). A thermocouple (5) is provided on the furnace shell (7). A manual ball valve (6) is provided on the furnace shell (7). Heating elements on both sides of the furnace chamber are provided inside the furnace lining (8). (9) A material frame (10) is provided on the heating elements (9) on both sides of the furnace chamber. A material frame (13) is provided on the material frame (10). A furnace bottom heating element (11) is provided on the furnace bottom plate (1). A handwheel (12) is provided on the furnace shell (7). A manual ball valve (14) is provided on the furnace shell (7). A flow meter (15) is provided on the manual ball valve (14). A furnace door pivot (16) is provided on the furnace door (2). The furnace door pivot (16) is fixedly connected to the furnace shell (7).

2. The nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating according to claim 1, characterized in that: The furnace bottom heating element (11) is an electric heating wire element, which achieves uniform heating through precise current control.

3. The nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating according to claim 1, characterized in that: The manual ball valve (6) is made of stainless steel, which can effectively prevent high-temperature gas leakage.

4. The nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating according to claim 1, characterized in that: The furnace door heating element (3) is a quartz tube heating element, used to prevent condensation on the furnace door during use.

5. The nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating according to claim 1, characterized in that: The material frame (10) is an adjustable design, which is convenient to adjust according to different batches of silicon carbide powder.

6. The nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating according to claim 1, characterized in that: The furnace door pivot (16) is made of high-temperature resistant alloy material, which has high wear resistance and corrosion resistance.

7. The nitrogen-protected box-type silicon carbide powder preheating furnace with uniform heating according to claim 1, characterized in that: The heating elements (9) on both sides of the furnace are designed with segmented heating, which can adjust the heating power as needed to ensure uniform temperature distribution.

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