Atmosphere sintering kiln sealing device

Abstract

The invention relates to the technical field of sintering kilns, and discloses an atmosphere sintering kiln sealing device which comprises a furnace body, a plurality of partition plates are fixedly connected to the inner wall of the furnace body and used for dividing the interior of the furnace body into a plurality of independent spaces, the number of the independent spaces is one group smaller than that of the partition plates, and the independent space in the middle area is a main heating section. The independent space of the other area is divided into a preheating section and a cooling section according to the front position and the rear position, by arranging the pressurizing pipe to communicate the cavity with the exhaust hood, when the draught fan inputs gas through the exhaust hood to form the needed atmosphere, the interior of the exhaust hood is in a high-pressure state, part of the gas in the exhaust hood can be injected into the gas cylinder through the pressurizing pipe, and therefore the needed atmosphere is formed. The piston rod is extruded, so that the piston rod extends out to drive the upper sealing plate to slide in the slide way, the upper sealing plate is in contact with the lower sealing plate, the feeding port of the partition plate is completely closed, flowing of gas at the feeding port is blocked, and independent gas spaces are formed on the two sides of the partition plate, so that the situation that different areas need different atmosphere conditions is avoided; and mutual interference among the gases is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of sintering furnaces, and in particular to a sealing device for an atmosphere sintering furnace. Background Art

[0002] The atmosphere sintering furnace raises the temperature inside the furnace to the required sintering temperature through heating elements, and at the same time introduces specific gases, such as nitrogen and argon, into the furnace to create the required atmosphere. In this atmosphere, the material undergoes a sintering reaction to achieve bonding and densification between particles. The atmosphere sintering furnace sealing device is an important device used to ensure the stability of the atmosphere inside the furnace, prevent the entry of external air, and prevent gas leakage in the furnace.

[0003] The prior art, such as the Chinese patent "CN220304205U", provides a high-temperature atmosphere sintering furnace sealing device. The high-temperature atmosphere sintering furnace sealing device includes: a packing sealing mechanism, an air sealing mechanism, and a graphite ring sealing mechanism; the packing sealing mechanism and the air sealing mechanism are suitable for performing a primary seal on the gap between the furnace body and the cover shell; the graphite ring sealing mechanism is suitable for performing a secondary seal on the gap between the furnace body and the cover shell on the basis of the primary seal, the packing sealing mechanism and the air sealing mechanism are used to seal the gap between the furnace body and the cover shell once, and then the graphite ring sealing mechanism is used to perform a secondary seal on the gap between the furnace body and the cover shell on the basis of the primary seal, so that the sealing effect is better and it is ensured that the material and atmosphere in the furnace body are not leaked in the high temperature state.

[0004] but:

[0005] For example, in the process of heating lithium battery materials, most of them need atmosphere protection, and the atmosphere required for production needs to be continuously injected into the kiln. Take lithium battery negative electrode materials and lithium iron phosphate as examples, especially in the cooling section of the kiln, nitrogen needs to be continuously injected for protection. It needs to be fully sealed, and the concentration of other atmospheres needs to be controlled below 50ppm, but the continuous injection of nitrogen will consume a lot of nitrogen and cause certain costs. Secondly, because the production kiln is relatively sealed to the outside, the nitrogen at the injection position has too high air pressure, and the local high pressure in the cooling section will cause the protective gas to flow back to the low pressure (the end of the front firing zone), which will affect the firing atmosphere and production process, affect the firing quality of the product, and increase production energy consumption. (This is an airtightness requirement, because when it is a positive electrode material, oxygen needs to be injected, and the oxygen content needs to be high, and air other than oxygen is not allowed to enter). Summary of the invention

[0006] The purpose of the present invention is to provide an atmosphere sintering furnace sealing device in order to solve the above-mentioned problems and overcome the defects of the prior art, as described in detail below.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides an atmosphere sintering furnace sealing device, comprising a furnace body, wherein the inner wall of the furnace body is fixedly connected with a plurality of partitions for dividing the interior of the furnace body into a plurality of independent spaces, wherein the number of independent spaces is one group less than the number of partitions, and the independent space in the middle area is a main heating section, and the independent spaces in the remaining areas are divided into a preheating section and a cooling section according to the front and rear positions, and feed ports are provided on the partitions, and exhaust hoods are fixedly connected to the positions of the top of the inner wall of the furnace body corresponding to the preheating section, the heating section, and the cooling section, respectively, and fans are fixedly connected to the positions of the furnace body corresponding to the exhaust hoods, and the air outlet of the fan is fixedly connected to the exhaust hood;

[0009] A sealing mechanism is provided inside the partition plate for sealing the space of the furnace body;

[0010] The outside of the furnace body is provided with a gas distribution mechanism for providing the required atmosphere for the materials inside the furnace body;

[0011] A conveying mechanism is provided inside the furnace body for conveying the sagger loaded with materials;

[0012] The sealing mechanism includes a lower sealing plate, which is fixedly connected to the bottom of the inner wall of the feed port, the partition is provided with a cavity at a position above the feed port, the inner wall of the cavity is provided with a slide, the inner wall of the slide is slidably connected with an upper sealing plate, the cavity is connected with the interior of the exhaust hood through a pressurized pipe, the contact surfaces of the upper sealing plate and the lower sealing plate are V-shaped, an air chamber is provided inside the upper sealing plate, a piston plate is slidably connected in the air chamber, push rods are fixedly connected on both sides of the bottom of the piston plate, and jet grooves are respectively provided on the inner wall of the upper sealing plate on both sides of the air chamber, one end of the top of the jet groove is connected with the interior of the air chamber, and one end of the bottom of the jet groove extends to the inside of the V-shaped groove at the bottom of the upper sealing plate, and a return spring is fixedly connected to the position between the inside of the upper sealing plate and the top of the piston plate.

[0013] Preferably, a mounting plate is fixedly connected to the inner wall of the cavity below the pressure tube, gas cylinders are fixedly connected to both sides of the inner wall of the mounting plate, a piston rod is slidably connected to the inner wall of the gas cylinder, and the bottom of the piston rod is fixedly connected to the top of the upper sealing plate.

[0014] Preferably, the tops of the two piston rods are fixedly connected with traction ropes, and the traction ropes extend to a position between the two groups of air cylinders, the bottoms of the two traction ropes are fixedly connected with counterweight blocks, and pulley groups for supporting the traction ropes are respectively provided on both sides of the cavity between the two groups of air cylinders.

[0015] Preferably, the inner wall of the cavity is fixedly connected to a limit frame, and the inner wall of the limit frame is slidably connected to the counterweight.

[0016] Preferably, buffer pads are slidably connected to the four corners of the inner wall of the limit frame, and a spring is fixedly connected to the position between the buffer pad and the inner wall of the limit frame.

[0017] Preferably, the gas distribution mechanism includes a preheating pipe, which is connected to the air inlet of the fan located above the preheating section, and a first exhaust pipe is fixedly connected to the bottom of the furnace body below the preheating section.

[0018] Preferably, the gas distribution mechanism further comprises an output pipe, which is fixedly connected to an air inlet of a fan located above the heating section, and a second exhaust pipe is fixedly connected to a position at the bottom of the furnace body located below the heating section.

[0019] Preferably, the gas distribution mechanism further comprises a circulation pipe, which is fixedly connected to the air inlet of the fan located above the cooling section, and one end of the circulation pipe away from the fan is fixedly connected to a position at the bottom of the furnace body below the cooling section.

[0020] Preferably, the top of the circulation pipe is fixedly connected to an atmosphere pipe, and the circulation pipe and the second exhaust pipe are both provided with a heat exchange section on the back of the furnace body. The end of the preheating pipe away from the fan passes through the second exhaust pipe and the circulation pipe in the heat exchange section in sequence, and the preheating pipe is spirally arranged inside the heat exchange section.

[0021] Preferably, the conveying mechanism includes a through groove, which is opened on the inner wall of the supporting platform, and the inner wall of the through groove is rotatably connected to multiple groups of conveying rollers, one end of the conveying rollers is fixedly connected to a first bevel gear, and the outer wall of each first bevel gear is meshedly connected to a second bevel gear, and the outer wall of the supporting platform is fixedly connected to a driving servo motor for driving the second bevel gear to rotate.

[0022] The beneficial effects are:

[0023] 1. The present invention connects the cavity with the exhaust hood by arranging a pressurized pipe. When the fan inputs gas through the exhaust hood to form the required atmosphere, the interior of the exhaust hood is in a high-pressure state. Part of the gas inside the exhaust hood will be injected into the gas cylinder through the pressurized pipe and squeeze the piston rod, so that the piston rod extends to drive the upper sealing plate to slide on the slideway, so that the upper sealing plate contacts the lower sealing plate, so that the feed port of the partition is completely closed to block the flow of gas at the feed port, and independent gas spaces are formed on both sides of the partition to avoid interference between gases when the required atmosphere conditions in different areas are different. Since the sintering process requires continuous input of the required atmosphere, the upper sealing plate connected to the piston rod is under the action of the influx of high-pressure airflow. When the upper and lower sealing plates are used, the contact surface with the lower sealing plate is always in a tight state to ensure the sealing of different independent areas, so as to ensure the stability of the atmosphere concentration during the sintering process. When the upper and lower sealing plates are close to each other and closed, the push rod will contact the upper and lower sealing plates before the upper and lower sealing plates, so that during the continuous downward pressure of the lower sealing plate, the push rod will retract into the air chamber, so that the piston plate connected to the push rod will squeeze the air in the air chamber, so that it enters from the upper end of the air injection groove and is ejected from the V-shaped groove at the lower end of the air injection groove. The impact force of the ejected airflow will clean the contact surface of the upper and lower sealing plates during the closing process of the upper and lower sealing plates, so as to avoid the adhesion of dirt and affect the sealing when the upper and lower sealing plates are fitted together.

[0024] 2. The present invention arranges a counterweight block between the gas cylinders and connects the piston rod through a traction rope, so that when the material in the furnace body is completed after the current process flow and is ready to enter the next area for processing, the fan stops inputting gas. At this time, the pressure in the gas cylinder gradually recovers, and the traction rope is pulled on the pulley block under the action of the gravity of the counterweight block to move, and the piston rod is lifted to separate the upper sealing plate from the lower sealing plate, so as to achieve the purpose of automatic opening and closing of the upper sealing plate and the lower sealing plate at the feed port, so as to facilitate the subsequent transportation of materials.

[0025] 3. The present invention arranges the preheating tube to pass through the heat exchange section between the second exhaust pipe and the circulation tube. When the air in the preheating tube enters the heat exchange section between the second exhaust pipe and the circulation tube, the air in the preheating tube absorbs the heat of the air in the heat exchange section, so as to utilize the waste heat to heat up the air in the preheating tube, so as to facilitate the preheating of the material. Moreover, since the inert gas in the circulation tube is used to cool the material, the heat inside the circulation tube can be taken away by the gas in the preheating tube, which can also assist the cooling of the circulation tube, thereby avoiding the problem that the gas inside the circulation tube absorbs heat and is saturated, resulting in a decrease in the cooling effect. Moreover, by circulating the inert gas for cooling, it is avoided that when conventional kilns cool the material, nitrogen needs to be continuously injected, which requires a large amount of nitrogen to be consumed, resulting in an increase in the cost of the overall production process. Moreover, by using the gas in the preheating tube to take away the heat inside the circulation tube for heat exchange, it is possible to avoid excessive cooling that causes large thermal stress inside the battery, which may cause rupture or stratification of the electrode material, affecting the battery performance and life, and ensure that the cooling speed of various parts of the battery is consistent, thereby preventing local overcooling or overheating.

[0026] Fourth, the present invention adopts the method of conveying by conveying rollers to facilitate the conveying of high-temperature materials in the sagger, and can use the gaps between the spaced conveying rollers to stagger the closed positions of the upper sealing plate and the lower sealing plate at the feed inlet to ensure the sealing of the kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of the overall appearance of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of the furnace body in the present invention;

[0030] Figure 3 It is a structural schematic diagram of the sealing mechanism in the present invention;

[0031] Figure 4 It is a schematic diagram of the internal structure of the partition in the present invention;

[0032] Figure 5 It is a structural schematic diagram of the valve mechanism in the present invention;

[0033] Figure 6 It is a structural schematic diagram of the preheating tube in the present invention;

[0034] Figure 7It is a structural schematic diagram of the conveying mechanism in the present invention;

[0035] Figure 8 It is a structural schematic diagram of the upper sealing plate in the present invention.

[0036] The accompanying drawings are marked as follows: 1. furnace body; 2. supporting platform; 3. partition; 4. feed port; 5. fan; 6. exhaust hood; 7. lower sealing plate; 8. upper sealing plate; 81. air chamber; 82. piston plate; 83. push rod; 84. jet slot; 85. reset spring; 9. cavity; 10. pressurized pipe; 11. slideway; 12. mounting plate; 13. air cylinder; 14. piston rod; 15. pulley block; 16. traction rope; 17. counterweight; 18. limit frame; 19. buffer pad; 20. preheating pipe; 21. first exhaust pipe; 22. output pipe; 23. second exhaust pipe; 24. circulation pipe; 25. atmosphere pipe; 26. heat exchange section; 27. through groove; 28. conveying roller; 29. ​​first bevel gear; 30. second bevel gear; 31. servo motor. DETAILED DESCRIPTION

[0037] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0038] See also Figure 1 - Figure 7As shown, the present invention provides an atmosphere sintering furnace sealing device, including a furnace body 1, the inner wall of the furnace body 1 is fixedly connected to a plurality of partitions 3 for dividing the interior of the furnace body 1 into a plurality of independent spaces, the number of independent spaces is one group less than the number of partitions 3, and the independent space in the middle area is the main heating section, and the independent spaces in the remaining areas are divided into a preheating section and a cooling section according to the front and rear positions, and the partitions 3 are provided with feed ports 4, the top of the inner wall of the furnace body 1 corresponding to the preheating section, the heating section, and the cooling section are respectively fixedly connected with exhaust hoods 6, the positions of the furnace body 1 corresponding to the exhaust hood 6 are fixedly connected with fans 5, and the air outlet of the fans 5 is fixedly connected to the exhaust hood 6, the interior of the partition 3 is provided with a sealing mechanism for sealing the space of the furnace body 1, and the exterior of the furnace body 1 is provided with The gas distribution mechanism is used to provide the required atmosphere for the materials inside the furnace body 1. A conveying mechanism is arranged inside the furnace body 1 for conveying the sagger loaded with materials, wherein the sealing mechanism includes a lower sealing plate 7, which is fixedly connected to the bottom of the inner wall of the feed port 4. The partition 3 is provided with a cavity 9 at the position above the feed port 4, and a slide 11 is provided on the inner wall of the cavity 9. The inner wall of the slide 11 is slidably connected with an upper sealing plate 8. The feed port 4 of the partition 3 is completely closed through the contact between the upper sealing plate 8 and the lower sealing plate 7 to block the flow of gas at the feed port 4, thereby forming independent gas spaces on both sides of the partition 3. The cavity 9 is connected to the inside of the exhaust hood 6 through a pressurized pipe 10. The exhaust hood 6 is used to cooperate with the fan 5 to input the required gas to form a gas chamber inside the furnace body 1. The gas environment required for sintering, the upper sealing plate 8 and the lower sealing plate 7 are both made of aluminum silicate ceramic fiber. Aluminum silicate ceramic fiber has the characteristics of low thermal conductivity, low heat capacity, high temperature resistance, etc., can be used for a long time in a high temperature environment of 1000℃-1300℃, has good chemical stability, is not easy to react with the sintering atmosphere, and its fibrous structure gives it a certain flexibility and elasticity, which can play a dual role of sealing and heat insulation. The contact surface of the upper sealing plate 8 and the lower sealing plate 7 is arranged in a V-shape, and an air chamber 81 is opened inside the upper sealing plate 8, and a piston plate 82 is slidably connected to the air chamber 81. Both sides of the bottom of the piston plate 82 are fixedly connected with push rods 83, and the inner wall of the upper sealing plate 8 is located on both sides of the air chamber 81. Jet grooves 84 are respectively opened, and the top of the jet groove 84 One end is connected to the interior of the air chamber 81, and one end of the bottom of the air jet groove 84 extends to the inside of the V-shaped groove at the bottom of the upper sealing plate 8. A return spring 85 is fixedly connected to the position between the inside of the upper sealing plate 8 and the top of the piston plate 82. When the upper sealing plate 8 and the lower sealing plate 7 are close to each other and closed, the push rod 83 will contact the lower sealing plate 7 before the upper sealing plate 8, so that during the continuous downward pressure of the lower sealing plate 7, the push rod 83 will retract into the air chamber 81, so that the piston plate 82 connected to the push rod 83 will squeeze the air in the air chamber 81, so that it enters from the upper end of the air jet groove 84 and then sprays out from the lower end of the air jet groove 84 located in the V-shaped groove. The impact force of the sprayed airflow will clean the contact surface between the upper sealing plate 8 and the lower sealing plate 7 during the closing process of the upper sealing plate 8 and the lower sealing plate 7.In order to avoid the adhesion of dirt and the influence of the sealing performance when the upper sealing plate 8 and the lower sealing plate 7 are fitted together, the inner wall of the cavity 9 is fixedly connected with a mounting plate 12 at a position below the pressure tube 10, and the inner walls of the mounting plate 12 are respectively fixedly connected with gas cylinders 13, and the inner wall of the gas cylinder 13 is slidably connected with a piston rod 14, and the bottom of the piston rod 14 is fixedly connected with the top of the upper sealing plate 8. The cavity 9 is connected with the exhaust hood 6 by setting the pressure tube 10. When the fan 5 inputs gas through the exhaust hood 6 to form the required atmosphere, the interior of the exhaust hood 6 is in a high-pressure state, and part of the gas inside the exhaust hood 6 will be injected into the gas cylinder 13 through the pressure tube 10 and squeeze the piston rod 14. , so that the piston rod 14 extends to drive the upper sealing plate 8 to slide on the slide 11, so that the upper sealing plate 8 contacts the lower sealing plate 7, so that the feed port 4 of the partition 3 is completely closed to block the flow of gas at the feed port 4, and independent gas spaces are formed on both sides of the partition 3 to avoid mutual interference between gases in different areas and affect the atmosphere concentration of each area. In addition, since the sintering process requires continuous input of the required atmosphere, the upper sealing plate 8 connected to the piston rod 14 is always in a tight state with the contact surface of the lower sealing plate 7 under the action of the influx of high-pressure airflow, so as to ensure the sealing of different independent areas and ensure the stability of the atmosphere concentration during the sintering process. ,

[0039] In this embodiment, please refer to Figure 3 , Figure 4 The tops of the two piston rods 14 are fixedly connected with traction ropes 16, and the traction ropes 16 extend to the position between the two groups of gas cylinders 13. The bottoms of the two traction ropes 16 are fixedly connected with counterweights 17. The positions on both sides of the cavity 9 between the two groups of gas cylinders 13 are respectively provided with pulley groups 15 for supporting the traction ropes 16. The counterweights 17 are provided between the gas cylinders 13 and the piston rods 14 are connected with traction ropes 16. When the material in the furnace body 1 is ready to enter the next area for processing after the current process flow is completed, the fan 5 stops inputting gas. At this time, the pressure in the gas cylinder 13 gradually recovers. Under the action of the gravity of the counterweights 17, the traction ropes 16 are pulled to move on the pulley groups 15, and the piston rods 14 are lifted to separate the upper sealing plate 8 from the lower sealing plate 7, so as to achieve the purpose of automatic opening and closing of the upper sealing plate 8 and the lower sealing plate 7 at the feed port 4, so as to facilitate the subsequent transportation of materials.

[0040] For further information, see Figure 4The inner wall of the cavity 9 is fixedly connected to a limit frame 18, and the inner wall of the limit frame 18 is slidably connected to the counterweight 17. The four corners of the inner wall of the limit frame 18 are slidably connected with buffer pads 19, and a spring is fixedly connected to the position between the buffer pad 19 and the inner wall of the limit frame 18. By setting the limit frame 18 on the inner wall of the cavity 9 to maintain the stability of the counterweight 17 when it moves up and down, it can effectively prevent the counterweight 17 from shaking and colliding when moving in the cavity 9. By setting the buffer pad 19 on the inner wall of the limit frame 18, the inertia generated by the movement of the counterweight 17 can be buffered, thereby avoiding collision and vibration in the cavity 9, which affects the overall service life of the equipment.

[0041] For further information, see Figure 5 , Figure 6 The gas distribution mechanism includes a preheating pipe 20, which is connected to the air inlet of the fan 5 located above the preheating section. A first exhaust pipe 21 is fixedly connected to the position of the bottom of the furnace body 1 below the preheating section. The gas distribution mechanism also includes an output pipe 22, which is fixedly connected to the air inlet of the fan 5 located above the heating section. A second exhaust pipe 23 is fixedly connected to the position of the bottom of the furnace body 1 below the heating section. The gas distribution mechanism also includes a circulation pipe 24, which is fixedly connected to the air inlet of the fan 5 located above the cooling section, and one end of the circulation pipe 24 away from the fan 5 is fixedly connected to the position of the bottom of the furnace body 1 below the cooling section. The gas distribution mechanism can input the required atmosphere according to different sintering materials. After the materials enter the designated area inside the furnace body 1, different gases are connected to the gas distribution mechanism for processing. Usually, after the sagger loaded with materials enters the preheating section inside the furnace body 1, it will be connected to the gas used to sinter the materials through the preheating pipe 20. The preheated gas is pressurized by the fan 5 at the corresponding position and injected from the exhaust hood 6 into the preheating section to preheat the material in the sagger, so as to shorten the heating time required for the material during subsequent sintering, and then discharged from the first exhaust pipe 21. When the sagger loaded with the material enters the heating section from the preheating section, the required atmosphere is connected through the output pipe 22, and is pressurized by the fan 5 at the corresponding position and injected from the exhaust hood 6, and then heated by the heating component inside the furnace body 1 to start sintering, and discharged from the second exhaust pipe 23. After sintering is completed, after the sagger loaded with the material enters the cooling section from the heating section, it is pressurized by the fan 5 at the corresponding position, so that the inert gas circulates between the circulation pipe 24 and the cooling section, absorbs the heat of the material by the inert gas to cool it, and cools it by recycling the inert gas, thereby avoiding the need to continuously inject nitrogen when cooling the material in a conventional kiln, which consumes a large amount of nitrogen and causes the problem of increased cost in the overall production process.

[0042] Also, see Figure 5 , Figure 6The top of the circulation pipe 24 is fixedly connected with an atmosphere pipe 25 for injecting inert gas. The circulation pipe 24 and the second exhaust pipe 23 are both provided with a heat exchange section 26 on the back of the furnace body 1. The end of the preheating pipe 20 away from the fan 5 passes through the second exhaust pipe 23 and the circulation pipe 24 in turn at the position of the heat exchange section 26, and the position of the preheating pipe 20 inside the heat exchange section 26 is arranged in a spiral shape. The area of ​​the preheating pipe 20 inside the heat exchange section 26 is arranged in a spiral shape, which can increase the contact area with the air. The heat absorption efficiency is improved by arranging the preheating pipe 20 to pass through the heat exchange section 26 of the second exhaust pipe 23 and the circulation pipe 24. When the air in the preheating pipe 20 enters the heat exchange section 26 between the second exhaust pipe 23 and the circulation pipe 24 The air in the preheating tube 20 will absorb the heat of the air in the heat exchange section 26, so as to utilize the waste heat to heat up the air in the preheating tube 20, so as to facilitate the preheating of the material. Moreover, since the inert gas in the circulation tube 24 is used to cool the material, the heat inside the circulation tube 24 can be taken away by the gas in the preheating tube 20, which can also assist the circulation tube 24 in cooling down, thereby avoiding the problem that the gas inside the circulation tube 24 absorbs heat saturation and the cooling effect is reduced. Heat exchange is performed by taking away the heat inside the circulation tube 24 by the gas in the preheating tube 20, thereby avoiding excessive cooling that may cause large thermal stress inside the battery, which may cause rupture or stratification of the electrode material, affecting the battery performance and life, and ensuring that the cooling speed of various parts of the battery is consistent to prevent local overcooling or overheating.

[0043] In addition, see Figure 1 , Figure 7 The conveying mechanism includes a through groove 27, which is opened on the inner wall of the supporting platform 2. The inner wall of the through groove 27 is rotatably connected to multiple groups of conveying rollers 28. One end of the conveying rollers 28 is fixedly connected to a first bevel gear 29, and the outer wall of each first bevel gear 29 is meshed and connected to a second bevel gear 30. The outer wall of the supporting platform 2 is fixedly connected to a driving servo motor 31 for driving the second bevel gear 30 to rotate. By adopting the conveying roller 28 for conveying, it is convenient to convey the high-temperature material in the sagger, and the gap between the spaced conveying rollers 28 can be used to stagger the closed position of the upper sealing plate 8 and the lower sealing plate 7 at the feed port 4.

[0044] How it works

[0045] When in use, the sagger loaded with materials is placed above the conveying roller 28, and the servo motor 31 is started to drive the second bevel gear 30 to rotate, so that the conveying roller 28 is driven to rotate synchronously through each meshing first bevel gear 29, so as to facilitate the conveying of the sagger loaded with materials above the conveying roller 28. After the materials enter the designated area inside the furnace body 1, different gases are connected to the gas distribution mechanism for processing, and the cavity 9 is connected to the exhaust hood 6 by setting a pressurized pipe 10. When the fan 5 inputs gas through the exhaust hood 6 to form the required atmosphere, the interior of the exhaust hood 6 is in a high-pressure state, and part of the gas inside the exhaust hood 6 will be injected into the gas cylinder 13 through the pressurized pipe 10, and squeeze the piston rod 14, so that the piston rod 14 extends to drive the upper seal The plate 8 slides on the slide 11 to make the upper sealing plate 8 contact with the lower sealing plate 7, so that the feed port 4 of the partition 3 is completely closed to block the flow of gas at the feed port 4, and form independent gas spaces on both sides of the partition 3 to avoid mutual interference between gases in different areas and affect the atmosphere concentration in each area. Since the sintering process requires continuous input of the required atmosphere, the upper sealing plate 8 connected to the piston rod 14 is always in a tight state with the contact surface of the lower sealing plate 7 under the action of the influx of high-pressure airflow to ensure the sealing of different independent areas and the stability of the atmosphere concentration during the sintering process. When the upper sealing plate 8 and the lower sealing plate 7 are close to each other and closed, the push rod 83 will contact the lower sealing plate 7 before the upper sealing plate 8, so that As the lower sealing plate 7 is continuously pressed downward, the push rod 83 will retract into the air chamber 81, so that the piston plate 82 connected to the push rod 83 will squeeze the air in the air chamber 81, causing it to enter from the upper end of the jet slot 84 and then be ejected from the V-shaped slot at the lower end of the jet slot 84. The impact force of the ejected airflow will clean the contact surface of the upper sealing plate 8 and the lower sealing plate 7 during the closing process of the upper sealing plate 8 and the lower sealing plate 7, so as to avoid the adhesion of dirt and the influence of the sealing performance of the upper sealing plate 8 and the lower sealing plate 7 when they are fitted together. In addition, a counterweight block 17 is arranged between the air cylinders 13 and connected to the piston rod 14 by a traction rope 16, so that when the material in the furnace body 1 is ready to enter the next area for processing after the current process is completed, the fan 5 stops inputting air. The state of the body, at this time, the pressure in the gas cylinder 13 is gradually restored, and the traction rope 16 is pulled on the pulley block 15 under the action of the gravity of the counterweight block 17, and the piston rod 14 is lifted to separate the upper sealing plate 8 from the lower sealing plate 7, so as to achieve the purpose of automatic opening and closing of the upper sealing plate 8 and the lower sealing plate 7 at the feed port 4. Usually, after the sagger loaded with materials enters the preheating section inside the furnace body 1, the gas used to preheat the materials will be connected through the preheating pipe 20, and the gas will be injected into the preheating section from the exhaust hood 6 through the corresponding position of the fan 5 to preheat the materials in the sagger, so as to shorten the heating time required for the materials during subsequent sintering, and then be discharged from the first exhaust pipe 21. When the sagger loaded with materials enters the heating section from the preheating section, the required atmosphere will be connected through the output pipe 22.The inert gas is injected from the exhaust hood 6 by the fan 5 at the corresponding position, and then heated by the heating component inside the furnace body 1 to start sintering, and discharged from the second exhaust pipe 23. After sintering is completed, after the sagger loaded with materials enters the cooling section from the heating section, the fan 5 at the corresponding position is pressurized, so that the inert gas circulates between the circulation pipe 24 and the cooling section, and the inert gas absorbs the heat of the material to cool it down. By setting the preheating pipe 20 to pass through the heat exchange section 26 of the second exhaust pipe 23 and the circulation pipe 24, when the preheating pipe 20 passes through the heat exchange section 26 of the circulation pipe 24, When the air in the tube 20 enters the heat exchange section 26 located between the second exhaust pipe 23 and the circulation pipe 24, the air in the preheating tube 20 will absorb the heat of the air in the heat exchange section 26, so as to use the waste heat to heat up the air in the preheating tube 20, so as to be convenient for material preheating. In addition, since the inert gas in the circulation pipe 24 is used to cool the material, the heat inside the circulation pipe 24 is taken away by the gas in the preheating tube 20, which can also assist in cooling the circulation pipe 24, avoiding the problem that the gas inside the circulation pipe 24 absorbs heat saturation and leads to a decrease in the cooling effect.

[0046] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An atmosphere sintering furnace sealing device, characterized in that: The invention comprises a furnace body (1), wherein the inner wall of the furnace body (1) is fixedly connected to a plurality of partitions (3) for dividing the interior of the furnace body (1) into a plurality of independent spaces, wherein the number of independent spaces is one group less than the number of partitions (3), and the independent spaces in the middle area are the main heating sections, and the independent spaces in the remaining areas are divided into preheating sections and cooling sections according to the front and rear positions, and the partitions (3) are provided with feed ports (4), and exhaust hoods (6) are fixedly connected to the top of the inner wall of the furnace body (1) at positions corresponding to the preheating section, the heating section, and the cooling section, respectively, and fans (5) are fixedly connected to the positions of the furnace body (1) corresponding to the exhaust hood (6), and the air outlet of the fan (5) is fixedly connected to the exhaust hood (6); A sealing mechanism is provided inside the partition (3) for sealing the space of the furnace body (1); The furnace body (1) is provided with a gas distribution mechanism outside thereof, which is used to provide the required atmosphere for the material inside the furnace body (1); A conveying mechanism is provided inside the furnace body (1) for conveying a sagger loaded with materials; The sealing mechanism comprises a lower sealing plate (7), the lower sealing plate (7) being fixedly connected to the bottom of the inner wall of the feed port (4), the partition (3) being provided with a cavity (9) at a position above the feed port (4), the inner wall of the cavity (9) being provided with a slideway (11), the inner wall of the slideway (11) being slidably connected with an upper sealing plate (8), the cavity (9) being connected to the interior of the exhaust hood (6) through a pressurizing pipe (10), the contact surface of the upper sealing plate (8) and the lower sealing plate (7) being arranged in a V-shape, and the interior of the upper sealing plate (8) being provided with an air chamber (8 1), a piston plate (82) is slidably connected in the air chamber (81), and push rods (83) are fixedly connected on both sides of the bottom of the piston plate (82), and the inner wall of the upper sealing plate (8) is located on both sides of the air chamber (81) and has jet grooves (84) respectively, one end of the top of the jet groove (84) is connected to the inside of the air chamber (81), and one end of the bottom of the jet groove (84) extends to the inside of the V-shaped groove at the bottom of the upper sealing plate (8), and a return spring (85) is fixedly connected at a position between the inside of the upper sealing plate (8) and the top of the piston plate (82).

2. The atmosphere sintering furnace sealing device according to claim 1, characterized in that: The inner wall of the cavity (9) is fixedly connected to a mounting plate (12) at a position below the pressure tube (10), and gas cylinders (13) are fixedly connected to both sides of the inner wall of the mounting plate (12), and a piston rod (14) is slidably connected to the inner wall of the gas cylinder (13), and the bottom of the piston rod (14) is fixedly connected to the top of the upper sealing plate (8).

3. The sealing device for an atmosphere sintering furnace according to claim 2, characterized in that: The tops of the two piston rods (14) are fixedly connected with traction ropes (16), and the traction ropes (16) extend to a position between the two groups of air cylinders (13). The bottoms of the two traction ropes (16) are fixedly connected with counterweights (17). The inside of the cavity (9) is provided with pulley blocks (15) for supporting the traction ropes (16) at positions on both sides between the two groups of air cylinders (13).

4. The sealing device for an atmosphere sintering furnace according to claim 3, characterized in that: The inner wall of the cavity (9) is fixedly connected to a limit frame (18), and the inner wall of the limit frame (18) is slidably connected to a counterweight (17).

5. The atmosphere sintering furnace sealing device according to claim 4, characterized in that: Buffer pads (19) are slidably connected to the four corners of the inner wall of the limiting frame (18), and a spring is fixedly connected to the position between the buffer pad (19) and the inner wall of the limiting frame (18).

6. The atmosphere sintering furnace sealing device according to claim 1, characterized in that: The gas distribution mechanism comprises a preheating pipe (20), the preheating pipe (20) is connected to the air inlet of a fan (5) located above the preheating section, and a first exhaust pipe (21) is fixedly connected to the bottom of the furnace body (1) located below the preheating section.

7. The atmosphere sintering furnace sealing device according to claim 6, characterized in that: The gas distribution mechanism also includes an output pipe (22), which is fixedly connected to the air inlet of the fan (5) located above the heating section, and a second exhaust pipe (23) is fixedly connected to the bottom of the furnace body (1) located below the heating section.

8. The atmosphere sintering furnace sealing device according to claim 7, characterized in that: The gas distribution mechanism also includes a circulation pipe (24), which is fixedly connected to the air inlet of the fan (5) located above the cooling section, and one end of the circulation pipe (24) away from the fan (5) is fixedly connected to the bottom of the furnace body (1) below the cooling section.

9. The atmosphere sintering furnace sealing device according to claim 8, characterized in that: The top of the circulation pipe (24) is fixedly connected to an atmosphere pipe (25); the circulation pipe (24) and the second exhaust pipe (23) are both provided with a heat exchange section (26) at the back of the furnace body (1); the end of the preheating pipe (20) away from the fan (5) passes through the second exhaust pipe (23) and the circulation pipe (24) in sequence at the position of the heat exchange section (26); and the position of the preheating pipe (20) inside the heat exchange section (26) is arranged in a spiral shape.

10. The atmosphere sintering furnace sealing device according to claim 1, characterized in that: The conveying mechanism comprises a through slot (27), wherein the through slot (27) is formed on the inner wall of the bearing platform (2), the inner wall of the through slot (27) is rotatably connected to a plurality of groups of conveying rollers (28), one end of each of the conveying rollers (28) is fixedly connected to a first bevel gear (29), and the outer wall of each of the first bevel gears (29) is meshingly connected to a second bevel gear (30), and the outer wall of the bearing platform (2) is fixedly connected to a driving servo motor (31) for driving the second bevel gear (30) to rotate.

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