Atmosphere sintering furnace

Abstract

The utility model belongs to sintering furnace technical field especially for an atmosphere sintering furnace, including two furnace bodies, both sides of furnace body are equipped with heat preservation closed door, be equipped with control cylinder on heat preservation closed door, the inboard of heat preservation closed door is equipped with inner door, the inner door is opened and is closed through control cylinder, be equipped with vacuum pump between two furnace bodies, the sealed joint of vacuum pump has the connecting pipe, two connecting pipes one end respectively with two furnace bodies sealed connection, through setting the exhaust port in each orientation, can be convenient according to the product of burning in the stove is different, tests the influence of the exhaust of different positions to product quality, obtains the highest product quality, in addition through setting control cylinder on heat preservation closed door, opens or closes the inner door by control cylinder control, can open the inner door after the furnace body cooling to a certain degree after sintering is completed, accelerates the cooling, saves time, improves the efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of sintering furnace technology, specifically relating to an atmosphere sintering furnace. Background Technology

[0002] The working principle of an atmosphere sintering furnace is to control the atmosphere inside the furnace to achieve the sintering and hardening of materials. During the sintering process, the material is first placed inside the furnace, and then the furnace temperature is raised to the required level using a heating device. Simultaneously, a gas control system controls the atmosphere inside the furnace, such as nitrogen or argon, to maintain a suitable sintering environment. When used to process and refine toluene-free powders, various pre-mixed powdered materials are placed in a carrier tray and heated inside the furnace. The entire process needs to be maintained in a vacuum environment under nitrogen atmosphere protection. The heating process generates a large amount of acidic gas, while the remaining material is strongly alkaline. Therefore, the atmosphere sintering furnace needs to have strong resistance to acid and alkali corrosion. Furthermore, how to safely and rapidly cool the material inside the furnace after heating and sintering is also one of the core factors affecting the production efficiency of the sintering furnace. Utility Model Content

[0003] This invention provides an atmosphere sintering furnace that allows for exhaust from various directions as needed, and enables the opening of the inner furnace door at high temperatures without opening the insulation and sealing door, thereby accelerating cooling, saving time, and improving efficiency.

[0004] This utility model provides the following technical solution: an atmosphere sintering furnace, comprising two furnace bodies, each furnace body having an insulated sealing door on both sides, a control cylinder on each insulated sealing door, and an inner door on the inner side of each insulated sealing door, the inner door being opened and closed by the control cylinder, a vacuum pump being provided between the two furnace bodies, the vacuum pump being sealed with connecting pipes, one end of each of the two connecting pipes being sealed to the two furnace bodies respectively, and exhaust ports being provided at the top, bottom, and sides of each furnace body, the exhaust ports being controlled by exhaust valves, allowing exhaust from various directions as needed.

[0005] The furnace body is provided with a furnace wall protective layer, which includes, from the inside out, a graphite support plate, a graphite heating frame, a graphite hard felt heat spreader, a carbon felt insulation layer, a stainless steel frame, and a double-layer water-cooled furnace shell.

[0006] A pressure reducing valve is fixedly connected to the furnace body, and several heating rods are fixedly connected inside the furnace body.

[0007] The furnace body is equipped with a storage rack for carrying materials. The storage rack is stacked and placed on top of each other. Each storage rack has a platform, which is evenly distributed from top to bottom and is set at a certain angle.

[0008] The furnace body is equipped with a vacuum pumping assembly, which includes an electromagnetic differential pressure valve, a pneumatic baffle valve, and a vacuum pipeline. The vacuum pumping assembly is operated via a touch screen interface.

[0009] The furnace body is equipped with a waste discharge and collection assembly at the bottom, which includes an exhaust port, a graphite drain pipe, and a filter collection tank.

[0010] The beneficial effects of this utility model are:

[0011] This solution uses a single vacuum pump to evacuate two furnaces, reducing hardware investment. Furthermore, the device features exhaust ports at the top, bottom, and sides of the furnace, controlled by exhaust valves. Exhaust can be directed from various directions as needed. During firing, the reaction of materials inside the furnace may generate a large amount of gas, and adjusting the exhaust direction can affect the final product quality. This solution, with exhaust ports at various locations, facilitates testing the impact of exhaust from different locations on product quality, allowing for the acquisition of the highest product quality. Additionally, a control cylinder is installed on the insulated sealing door, which opens or closes the inner door. After sintering, once the furnace has cooled to a certain level, the inner door can be opened to accelerate cooling, saving time and improving efficiency.

[0012] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

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

[0014] Figure 2 This is the front view of the present invention;

[0015] Figure 3 This is a cross-sectional view of the present invention;

[0016] Figure 4 This is a schematic diagram of the internal structure of the furnace body in this utility model;

[0017] In the diagram: 1. Furnace body; 11. Insulated sealing door; 12. Control cylinder; 13. Pressure reducing valve; 14. Waste discharge and collection assembly; 15. Heating rod; 16. Vacuum assembly; 17. Furnace wall lining; 2. Vacuum pump; 21. Connecting pipe. Detailed Implementation

[0018] Please see Figures 1-4The present invention provides the following technical solution: it includes two furnace bodies 1, each furnace body 1 has a heat-insulating and sealing door 11 on both sides, a control cylinder 12 on the heat-insulating and sealing door 11, and an inner door on the inner side of the heat-insulating and sealing door 11. The inner door is opened and closed by the control cylinder 12. A vacuum pump 2 is provided between the two furnace bodies 1. A connecting pipe 21 is sealed to the vacuum pump 2. One end of the two connecting pipes 21 is sealed to the two furnace bodies 1 respectively. Exhaust ports are provided on the top, bottom and sides of the furnace body 1. The exhaust ports are controlled by exhaust valves and exhaust can be performed from various directions as needed.

[0019] In this implementation plan: Materials are delivered to the furnace opening of furnace body 1 using a loading trolley. The materials are then fed into the furnace and neatly arranged using rollers on the trolley and graphite plates installed inside the furnace. After cleaning the furnace, the furnace door is closed, and vacuuming and heating operations begin. Vacuum pump 2 is used to process both furnace bodies 1, evacuating to the required vacuum level and then replacing with inert gas. Heating is then initiated, and the temperature is automatically controlled according to the pre-set heating process. This plan uses one vacuum pump 2 to evacuate both furnace bodies 1. Additionally, this device has exhaust ports on the top, bottom, and sides of furnace body 1. The exhaust ports are controlled by exhaust valves, allowing exhaust from various directions as needed. During the firing process, the reaction of the materials inside the furnace may generate a large amount of gas. Adjusting the exhaust direction can affect the quality of the final product. This plan, by providing exhaust ports in various locations, can... To facilitate testing the impact of exhaust at different locations on product quality based on the different products being fired in the furnace, and to obtain the highest product quality, the furnace body 1 is designed with an exhaust port at the bottom, and a graphite guide pipe is installed inside to guide the high-temperature volatile gases in the furnace body 1 to the waste discharge collection component 14 at the bottom of the furnace. The waste discharge collection component 14 can collect tar or other substances. After the sintering process time is over, the machine will automatically stop and prompt an alarm. Through the heat-insulating sealing door 11 on the outside of the furnace cover, it can be operated without disrupting the atmosphere inside the furnace. Under high temperature conditions, the heat-insulating sealing door 11 can be opened inside the furnace, and the control cylinder 12 can be used to accelerate cooling, saving time and improving efficiency. Combined with the inner door set on the inside of the furnace body 1, the cooling efficiency can be further improved by opening the control cylinder 12. After the furnace is cooled down, the furnace cover can be opened, the materials can be taken out, the residue inside the furnace can be cleaned, and the next batch of production can be prepared.

[0020] The furnace body 1 is equipped with a furnace wall protective layer 17, which, from the inside out, includes a graphite support plate, a graphite heating frame, a graphite hard felt heat spreader, a carbon felt insulation layer, a stainless steel frame, and a double-layer water-cooled furnace shell. The graphite support plate is made of GSK material, and the bottom 8 sets of supporting graphite columns are fixed to the 304 adjustable support plate at the bottom of the furnace shell to transfer the weight of the material to the furnace shell. The graphite heating frame is made of high-strength graphite, and the graphite frame uses high-purity alumina as insulation support. The single-phase transformer has 3 independent heating groups, which are assembled in 3 groups and have graphite heating rods evenly distributed on the top, bottom, left, and right sides. The power inlet electrode is located on the side of the furnace body 1 for easy installation and maintenance. The graphite hard felt heat spreader is made of carbon paper hard felt with a thickness of 20mm and is fixed with carbon screws to adjust the uniformity of the temperature field inside the furnace.

[0021] A pressure reducing valve 13 is fixedly connected to the furnace body 1, and several heating rods 15 are fixedly connected inside the furnace body 1. The heating rods 15 can be graphite or silicon carbide heating rods. The heating elements are installed on the inner wall or bottom of the furnace chamber to ensure that the heat can be evenly transferred to all parts of the furnace chamber.

[0022] The furnace body 1 is equipped with several racks for carrying materials. These racks are stacked and each rack has a platform. The platforms are evenly distributed from top to bottom and are set at a certain angle. The stacked racks allow for the processing of a large amount of material at once. The furnace has heating sources at the top and sides, causing the middle layer of the platforms to tilt outward at a certain angle so that each layer can receive uniform radiant heat, ensuring uniform heating of the material and improving the sintering quality.

[0023] The furnace body 1 is equipped with a vacuum assembly 16, which includes an electromagnetic differential pressure valve, a pneumatic baffle valve, and a vacuum pipeline. The vacuum assembly 16 is operated through a touch screen interface. The pump model is 2X-70. The vacuum unit can be started manually or automatically. It is used to replace the gas in the furnace and extract tar impurities from the furnace.

[0024] The bottom of the furnace body 1 is equipped with a waste discharge and collection component 14, which includes an exhaust port, a graphite guide pipe, and a filter collection tank. The bottom of the furnace body 1 is equipped with a coke discharge and dewaxing pipe, which is made of high-purity graphite and directly connects to the high-temperature zone inside the furnace cavity. This allows the volatile tar substances in the high-temperature zone to be directly discharged outside the furnace, preventing tar from accumulating and carbonizing inside the furnace, thus affecting the service life of the insulation layer. The high-temperature volatile gases inside the furnace are guided to the filter collection tank at the bottom of the furnace. The waste discharge and collection component 14 can collect tar or other substances.

[0025] The working principle and usage process of this utility model are as follows: Material is delivered to the furnace opening of furnace body 1 via a loading trolley. The material is then fed into the furnace and neatly arranged using rollers on the trolley and graphite plates installed inside the furnace. After cleaning the dust inside the furnace, the furnace door is closed, and vacuuming and heating operations begin. Vacuum pump 2 is used to process both furnace bodies 1, evacuating to the required vacuum level and then replacing it with inert gas. Heating is then initiated, and the temperature is automatically controlled according to the pre-set heating process. Furnace body 1 has an exhaust port at the bottom, and a graphite drainage pipe is installed inside to guide the high-temperature volatile gases inside furnace body 1. The waste material is discharged and collected on the bottom of the furnace onto the collection assembly 14. After the sintering process is completed, the machine will automatically stop and prompt the user. The furnace can be operated without disrupting the atmosphere inside the furnace through the heat-insulating sealing door 11 on the outside of the furnace cover. Under high temperature conditions, the heat-insulating sealing door 11 can be opened inside the furnace, and the control cylinder 12 can be used to accelerate the cooling process, saving time and improving efficiency. Combined with the inner door set on the inside of the furnace body 1, the cooling efficiency can be further improved by opening the pneumatic valve. After the furnace has cooled down, the furnace cover can be opened, the material can be taken out, and the residue inside the furnace can be cleaned to prepare for the next batch of production.

Claims

1. An atmosphere sintering furnace, comprising two furnace bodies (1), characterized in that: The furnace body (1) is provided with heat-insulating and sealing doors (11) on both sides. The heat-insulating and sealing doors (11) are provided with control cylinders (12). The inner door is provided inside the heat-insulating and sealing doors (11). The inner door is opened and closed by the control cylinders (12). A vacuum pump (2) is provided between the two furnace bodies (1). A connecting pipe (21) is sealed to the vacuum pump (2). One end of the two connecting pipes (21) is sealed to the two furnace bodies (1). The furnace body (1) is provided with exhaust ports on the top, bottom and both sides. The exhaust ports are controlled by exhaust valves and exhaust is performed from various directions as needed.

2. The atmosphere sintering furnace according to claim 1, characterized in that: The furnace body (1) is provided with a furnace wall protective layer (17), which includes, from the inside out, a graphite support plate, a graphite heating frame, a graphite hard felt heat spreader, a carbon felt insulation layer, a stainless steel frame, and a double-layer water-cooled furnace shell.

3. The atmosphere sintering furnace according to claim 1, characterized in that: A pressure reducing valve (13) is fixedly connected to the furnace body (1), and several heating rods (15) are fixedly connected inside the furnace body (1).

4. The atmosphere sintering furnace according to claim 1, characterized in that: The furnace body (1) is provided with a shelf for carrying materials. There are several shelves, which are stacked together. Several platforms are provided on the shelves, which are evenly distributed from top to bottom. The platforms are set at a certain angle.

5. The atmosphere sintering furnace according to claim 1, characterized in that: The furnace body (1) is equipped with a vacuum assembly (16), which includes an electromagnetic differential pressure valve, a pneumatic baffle valve, and a vacuum pipeline. The vacuum assembly (16) is operated via a touch screen interface.

6. The atmosphere sintering furnace according to claim 1, characterized in that: The bottom of the furnace body (1) is provided with a waste discharge collection assembly (14), which includes an exhaust port, a graphite drain pipe and a filter collection tank.

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