Annealing device for producing electrically fused zirconia alumina brick

Abstract

This invention discloses an annealing apparatus for producing fused zirconia-alumina bricks, comprising a base with an annealing furnace at its top, a trolley slidably inserted into the furnace inlet, and two support seats symmetrically arranged on the top side of the trolley, forming several support positions for placing the fused zirconia-alumina bricks and creating an airflow gap between the top surface of the trolley and the bottom side of the bricks. By setting the support seats to form support positions, this invention allows the fused zirconia-alumina bricks to be lifted off the top surface of the trolley, creating gaps for hot gas to circulate within the furnace. Furthermore, by setting fixed cylinders, drainage holes, and piston valves on the support positions to form a drainage unit, hot gas from the furnace can be quickly drawn through the drainage holes into the upper chamber of the fixed cylinder, causing the hot gas to converge and flow towards the bottom gap of the fused zirconia-alumina bricks, thereby effectively ensuring the heating effect at the bottom of the bricks and eliminating the bottom heating blind zone.

Description

Technical Field

[0001] This invention relates to the field of fused zirconia-corundum brick production technology, and in particular to an annealing apparatus for fused zirconia-corundum brick production. Background Technology

[0002] Fused zirconia-corundum bricks are white solids formed by melting pure alumina powder and zircon sand containing zirconium oxide and silica in an electric furnace and then pouring the mixture into a mold for cooling. Their petrographic structure consists of a eutectic of corundum and zirconium oxaliplatinum and a glassy phase. From a phase perspective, it is a eutectic of corundum and zirconium oxaliplatinum phases, with the glassy phase filling the spaces between their crystals. It has advantages such as high temperature resistance, resistance to melt erosion, and strong thermal shock stability, and is widely used in various high-temperature industrial kilns.

[0003] After being cast, fused zirconia-corundum bricks retain a significant amount of internal casting stress. If used directly without treatment, they are highly susceptible to cracking, chipping, and deformation. Annealing is essential during production. Annealing, a process involving heating, holding, and controlled slow cooling, is a crucial step in eliminating residual internal stress, stabilizing the crystal structure, and improving the overall structural strength and service stability of the finished product. Currently, annealing fused zirconia-corundum bricks typically involves placing the bricks on a trolley and then pushing the trolley into the annealing furnace, relying on the furnace's natural heat... Radiation and natural convection are used to perform conventional annealing of fused zirconia-corundum bricks. However, since fused zirconia-corundum bricks often need to be placed stably on the trolley platform, their lower parts are often in direct or partial contact with the platform. This can easily create large areas of obstruction and blockage at the support contact points, making it difficult for hot air to circulate effectively at the bottom of the brick. This can easily create a blind spot in the bottom heating, resulting in uneven heating of the brick, a large temperature difference between the top and bottom, and incomplete and uneven release of residual casting stress. This significantly reduces the annealing effect and affects product quality.

[0004] Therefore, this application proposes an annealing apparatus for the production of fused zirconia-corundum bricks to address the aforementioned shortcomings. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an annealing apparatus for the production of fused zirconia-corundum bricks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An annealing apparatus for producing fused zirconia-corundum bricks, characterized in that it comprises: The base has an annealing furnace mounted on its top. A trolley, which can be slidably inserted into the inlet of the annealing furnace; Two support seats are symmetrically arranged on the top side of the trolley and form several support positions for placing the fused zirconia-alumina brick, and an airflow gap is formed between the top surface of the trolley and the bottom side of the fused zirconia-alumina brick. The drainage unit includes several fixed cylinders, which are embedded in the bottom side of the trolley and arranged corresponding to the support position. The top of the fixed cylinder has a drainage hole that is connected to the trolley, and a piston valve is installed inside it. The piston valve divides the inside of the fixed cylinder into an upper chamber and a lower chamber, and a first support member is provided at the bottom of the piston valve. A drive assembly, connected to the first support member, is used to drive the piston valve to move axially; The lifting unit includes multiple sets of sliding cavities and top columns. The sliding cavities are symmetrically opened on the top of the trolley and located on both sides of the fixed cylinder. The top columns can be lifted and inserted into the sliding cavities, and a second support member is provided at its bottom end. A transmission mechanism is provided between the second support member and the first support member to convert the downward movement of the piston valve into the upward movement of the top column.

[0007] As a further aspect of the present invention, the drainage unit further includes: Multiple sets of ventilation holes are symmetrically arranged on the top side of the support seat at each of the aforementioned support positions; Several side openings are symmetrically arranged in pairs on both sides of the support base and connected to the vent. The side openings are equipped with opening and closing components to control the opening and closing of the side openings. Several gas supply pipes are connected between the bottom end of the vent hole and the bottom end of the lower chamber of the fixed cylinder. When the fused zirconia alumina brick is placed on the support, the piston valve moves down to automatically open the side opening, so that the hot gas in the lower chamber is ejected through the side opening. When the fused zirconia alumina brick is lifted off the support by the top column, the opening and closing assembly closes the side opening, so that the hot gas in the lower chamber is ejected through the vent hole.

[0008] As a further embodiment of the present invention, the first support member includes a connecting arm and a fixing rod. The connecting arm is located below the fixing cylinder, and the top end of the connecting arm is connected to the fixing rod. The bottom end of the connecting arm is connected to the output end of the drive assembly. The top end of the fixing rod extends into the fixing cylinder and is fixedly connected to the piston valve.

[0009] As a further embodiment of the present invention, the second support member includes support frames symmetrically arranged on both sides of the connecting arm, and the top of the support frame is provided with a plurality of connecting rods facing the sliding cavity, the top of the connecting rods extending into the sliding cavity and being fixedly connected to the top column.

[0010] As a further embodiment of the present invention, the transmission mechanism includes a mounting frame symmetrically arranged on the bottom side of the trolley and located between the support frame and the connecting arm. The bottom end of the mounting frame is rotatably connected to a transmission gear. The side wall of the support frame is provided with a first toothed plate that meshes with the transmission gear. Both sides of the connecting arm are provided with second toothed plates. The connecting arm is driven to descend by the driving assembly, which enables the second toothed plates to mesh with the transmission gear.

[0011] As a further embodiment of the present invention, a protective frame is provided on the bottom side of the trolley and outside the second support member and the first support member. The drive assembly is located inside the protective frame and includes a cylinder. The bottom end of the cylinder is fixedly connected to the protective frame, and its top push rod is fixedly connected to the connecting arm.

[0012] As a further embodiment of the present invention, a second spring is sleeved on the outside of the connecting rod, the bottom end of the second spring is fixedly connected to the support frame, and the top end of the second spring is fixedly connected to the trolley.

[0013] As a further embodiment of the present invention, the opening and closing assembly includes a first spring, which is disposed in the side opening, and one end of the first spring near the vent is fixedly connected to the inner wall of the side opening, and the other end of the first spring is provided with a cover outside the side opening.

[0014] As a further embodiment of the present invention, a boss is provided at the connection between the inner side of the cover and the first spring, and a stepped groove adapted to the boss is provided at the port of the side opening.

[0015] As a further embodiment of the present invention, the bottom sides of the trolley are provided with a plurality of guide wheels arranged in an array, the top sides of the base are symmetrically provided with guide rails adapted to the guide wheels, and the top side of the base is provided with a groove facing the protective frame.

[0016] The technical effects and advantages provided by the present invention in the above technical solution are as follows: This invention establishes a support station by setting up a support base, which can lift the fused zirconia alumina brick off the top surface of the trolley and form a gap for the flow of hot gas in the furnace. Furthermore, by setting up a fixed cylinder, a flow-guiding hole, and a piston valve on the support station to form a flow-guiding unit, the hot gas flow in the furnace can be quickly drawn from the flow-guiding hole to the upper chamber in the fixed cylinder, so that the hot gas flow converges and flows towards the gap at the bottom of the fused zirconia alumina brick, thereby effectively ensuring the heating effect at the bottom of the fused zirconia alumina brick and eliminating the bottom heating blind zone. This invention, through the inclusion of a lifting unit, vent holes, and side openings, allows the side openings to automatically open during the process of driving hot airflow towards the bottom gap of the fused zirconia-alumina brick. The hot airflow from the lower chamber rapidly exits from both sides of the support base, circulating around the bottom perimeter of the fused zirconia-alumina brick, further promoting the circulation of hot airflow at the bottom of the brick and improving the uniformity of heating. Furthermore, after the top column lifts the fused zirconia-alumina brick from the support base, it further increases the space at the bottom of the brick, promoting rapid circulation of hot airflow. Simultaneously, it removes the original partial obstruction of the bottom area of ​​the fused zirconia-alumina brick by the support base, allowing the hot airflow to fully cover the entire bottom area of ​​the brick. At the same time, the side openings automatically reset and close, and the hot airflow from the vent holes in the lower chamber is concentrated upwards, directly blowing into the previously obstructed areas. This achieves comprehensive and uniform heating and annealing of the bottom of the fused zirconia-alumina brick, balancing the overall heating temperature of the brick, fully releasing internal casting stress, and significantly improving the annealing quality of the product. This invention, by driving the piston valve to reset and move upward, allows the hot airflow in the upper chamber to be pushed back and act on the fused zirconia-alumina brick. At the same time, the hot airflow in the furnace is quickly replenished into the lower chamber through the vent holes. This process can again promote the circulation of hot airflow in the gap at the bottom of the fused zirconia-alumina brick. After the top column descends and the fused zirconia-alumina brick falls back smoothly, the space in the lower chamber can continue to expand to further form a negative pressure suction. Through the adsorption of multiple sets of vent holes, the fused zirconia-alumina brick is tightly attracted and positioned on the support, thereby achieving stable placement of the fused zirconia-alumina brick, preventing displacement and shaking, and greatly ensuring safety and stability. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is one of the overall structural schematic diagrams of the present invention; Figure 2 This is the second schematic diagram of the overall structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the connection between the base and the trolley in this invention; Figure 4 This is a three-dimensional structural diagram of the trolley of the present invention viewed from above; Figure 5 This is a three-dimensional structural diagram of the trolley configuration of the present invention. Figure 6 This is a longitudinal sectional view of the trolley and protective frame of the present invention; Figure 7 This is a schematic diagram of the internal structure of the protective frame of the present invention; Figure 8This is a schematic diagram of the connection between the protective frame, the fixing cylinder, and the top column of the present invention; Figure 9 This is a schematic diagram of the structure of the second toothed plate moving down and meshing with the transmission gear in this invention; Figure 10 This is a schematic diagram of the structure of the rising top column of the present invention; Figure 11 This is a schematic diagram of the connection between the support base and the cover of the present invention.

[0019] In the diagram: 100, base; 200, annealing furnace; 300, trolley; 310, support seat; 400, protective frame; 500, fixed cylinder; 510, drain hole; 520, piston valve; 530, fixed rod; 540, connecting arm; 600, gas pipe; 610, vent hole; 620, side opening; 630, first spring; 640, cover; 650, boss; 660, stepped groove; 700, sliding cavity; 710, top column; 720, connecting rod; 730, support frame; 740, second spring; 800, cylinder; 900, mounting bracket; 910, transmission gear; 920, first toothed plate; 930, second toothed plate. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-2 As shown, this invention proposes an annealing device for the production of fused zirconia-corundum bricks, including a base 100 and a trolley 300. An annealing furnace 200 is provided at the top of the base 100, and the trolley 300 is slidably inserted into the inlet of the annealing furnace 200. Specifically, multiple guide wheels are arrayed on both sides of the bottom of the trolley 300, and guide rails adapted to the guide wheels are symmetrically arranged on both sides of the top of the base 100. Through the cooperation between the guide wheels and the guide rails, the trolley 300 can move smoothly on the base 100 along a set direction to complete the operation of the trolley 300 entering and exiting the annealing furnace 200. It should be noted that the annealing furnace 200 and its heating structure, temperature control adjustment method, etc. are common knowledge in the field, and are not fully shown in the figure, and are not the focus of this invention, so they will not be described in detail.

[0022] like Figure 3As shown, two support seats 310 are symmetrically arranged on the top side of the trolley 300, forming several support positions for placing fused zirconia alumina bricks, and creating an airflow gap between the top surface of the trolley 300 and the bottom side of the fused zirconia alumina bricks; multiple support positions for placing fused zirconia alumina bricks can be divided between the two support seats 310. When the fused zirconia alumina bricks are placed on the support positions, they can be lifted off the top surface of the trolley 300 as a whole, so that most of the bottom area of ​​the fused zirconia alumina bricks is unobstructed, and the gaps formed allow hot gas in the furnace to circulate, thereby ensuring that the bricks are heated fully and evenly, and guaranteeing the overall annealing effect of the fused zirconia alumina bricks.

[0023] like Figures 4-10 As shown, the annealing device also includes a flow guiding unit and a lifting unit. The flow guiding unit includes several fixed cylinders 500, which are embedded in the bottom side of the trolley 300 and arranged corresponding to the support positions. The top of the fixed cylinder 500 is connected to the trolley 300 by a flow guiding hole 510, and a piston valve 520 is installed inside it. The piston valve 520 divides the inside of the fixed cylinder 500 into an upper chamber and a lower chamber. The bottom of the piston valve 520 is provided with a first support member. The first support member includes a connecting arm 540 and a fixing rod 530. The connecting arm 540 is located below the fixed cylinder 500, and the top of the connecting arm 540 is connected to the fixing rod 530. The bottom of the connecting arm 540 is connected to the output end of the drive assembly. The top of the fixing rod 530 extends into the fixed cylinder 500 and is fixedly connected to the piston valve 520. The piston valve 520 is slidably sealed and installed on the inner wall of the fixed cylinder 500. Initially, the piston valve 520 is at the top of its stroke, and the upper chamber is at its minimum volume. The drive assembly drives the connecting arm 540 to move downward rapidly. The connecting arm 540 drives the piston valve 520 to slide rapidly down the inner wall of the fixed cylinder 500 through the fixed rod 530, which rapidly increases the volume of the upper chamber and creates a suction effect. Then, the hot air flow in the furnace is quickly extracted through the drainage hole 510, and the hot air flow converges and flows to the bottom gap of the fused zirconia alumina brick, thereby effectively ensuring the heating effect at the bottom of the fused zirconia alumina brick, eliminating the bottom heating blind zone, and ensuring the overall annealing quality and the stability of the finished product structure of the fused zirconia alumina brick.

[0024] The lifting unit includes multiple sets of sliding cavities 700 and top columns 710. The sliding cavities 700 are symmetrically opened on the top of the trolley 300 and located on both sides of the fixed cylinder 500. The top columns 710 can be lifted and inserted into the sliding cavities 700, and a second support member is provided at its bottom end. A transmission mechanism is provided between the second support member and the first support member to convert the downward movement of the piston valve 520 into the upward movement of the top column 710. The second support member includes support frames 730 symmetrically arranged on both sides of the connecting arm 540. The top of the support frame 730 is provided with multiple connecting rods 720 facing the sliding cavities 700. The top of the connecting rods 720 extends into the sliding cavities 700 and is fixedly connected to the top columns 710.

[0025] In this embodiment, a second spring 740 is sleeved on the outside of the connecting rod 720. The bottom end of the second spring 740 is fixedly connected to the support frame 730, and the top end of the second spring 740 is fixedly connected to the trolley 300. The second spring 740 can strengthen the connection between the support frame 730 and the trolley 300, making its movement more stable. When the support frame 730 rises, it will compress the second spring 740 to contract. When resetting, the elastic action of the second spring 740 further strengthens the stability of the support frame 730. After the second toothed plate 930 separates from the transmission gear 910, the first toothed plate 920 on the support frame 730 is less likely to drive the transmission gear 910 to move, thereby ensuring that the subsequent transmission gear 910 and the second toothed plate 930 re-mesh accurately.

[0026] A drive assembly is connected to the first support member, which is used to drive the piston valve 520 to move axially. In one specific embodiment of the present invention, a protective frame 400 is provided on the bottom side of the trolley 300 and outside the second support member and the first support member. The drive assembly is located inside the protective frame 400 and includes a cylinder 800. The bottom end of the cylinder 800 is fixedly connected to the protective frame 400, and its top push rod is fixedly connected to the connecting arm 540.

[0027] The protective frame 400 forms a protective enclosure around the first and second supports to prevent the trolley 300 from being damaged by collisions during movement. The drive assembly uses a cylinder 800 to drive the piston valve 520 quickly and accurately. In addition, the drive assembly can also use a motor and screw transmission drive method. The motor drives the screw to rotate, which in turn drives the connecting arm 540 to perform a stable vertical lifting motion to meet the requirements of precise control.

[0028] In one specific embodiment of the present invention, the transmission mechanism includes a mounting frame 900 symmetrically arranged on the bottom side of the trolley 300 and located between the support frame 730 and the connecting arm 540. The bottom end of the mounting frame 900 is rotatably connected to a transmission gear 910. The side wall of the support frame 730 is provided with a first toothed plate 920 that meshes with the transmission gear 910. Both sides of the connecting arm 540 are provided with second toothed plates 930. The connecting arm 540 is driven to descend by a drive assembly, which enables the second toothed plates 930 to mesh with the transmission gear 910.

[0029] Depend on Figure 9 It can be seen that when the drive assembly drives the piston valve 520 to slide down, in the first stage, the connecting arm 540 descends and its second toothed plate 930 does not engage with the transmission gear 910. At this time, the upper chamber rapidly draws hot air from the furnace, causing the hot air to converge and flow towards the bottom gap of the fused zirconia-corundum brick; Figure 10It can be seen that in the second stage, the connecting arm 540 continues to descend, causing the second toothed plate 930 to mesh with the transmission gear 910. At this time, the transmission gear 910 drives the support frame 730 to rise through the first toothed plate 920. The support frame 730 drives the top column 710 to move upward along the sliding cavity 700 through the connecting rod 720. At this time, the top column 710 rises but does not contact the fused zirconia alumina brick on the support seat 310. The upper chamber still draws hot airflow towards the bottom gap of the fused zirconia alumina brick and flows. In the third stage, multiple sets of top columns 710 rise synchronously with the fused zirconia alumina brick. The corundum brick's abutting action lifts the fused zirconia corundum brick, causing it to detach from the support 310. This further increases the gap between the bottom of the brick and the trolley 300, promoting rapid circulation of hot air. Simultaneously, it removes the partial obstruction of the bottom side of the fused zirconia corundum brick previously caused by the support 310, allowing the hot air to fully cover the entire bottom area of ​​the brick. This enables the fused zirconia corundum brick to undergo uniform heating and annealing from all directions, balancing the overall heating temperature of the brick, fully releasing internal casting stress, and significantly improving the annealing quality of the product.

[0030] like Figures 7-11 As shown, the drainage unit also includes: multiple sets of ventilation holes 610, symmetrically arranged on the top side of the support base 310 on each support station; and several side openings 620, which are symmetrically opened in pairs on both sides of the support base 310 and connected to the ventilation holes 610. The side openings 620 are provided with opening and closing components to control the opening and closing of the side openings 620. Several gas supply pipes 600 are connected between the bottom end of the vent 610 and the bottom end of the lower chamber of the fixed cylinder 500. When the fused zirconia alumina brick is placed on the support 310, the piston valve 520 moves down to automatically open the side opening 620, so that the hot air in the lower chamber is ejected through the side opening 620. When the fused zirconia alumina brick is lifted off the support 310 by the top column 710, the opening and closing component closes the side opening 620, so that the hot air in the lower chamber is ejected through the vent 610.

[0031] As the piston valve 520 slides down inside the fixed cylinder 500, the volume of the lower chamber continuously decreases and the internal air pressure increases. Since the air supply pipe 600 connects the lower chamber to the vent hole 610 on the support 310, the fused zirconia alumina brick is placed on the vent hole 610 to achieve a blocking and limiting effect. The air pressure in the lower chamber cannot push the heavier fused zirconia alumina brick upward through the vent hole 610. At this time, the opening and closing components in the side openings 620 on both sides of the vent hole 610 are subjected to air pressure, causing the baffle 640 to be pushed outward. The hot air flow in the lower chamber is quickly ejected from both sides of the support 310. The hot air flow ejected from both sides can surround the bottom periphery of the fused zirconia alumina brick to further promote the circulation of hot air flow at the bottom of the brick and improve the uniformity of the bottom heating. Meanwhile, when the fused zirconia-corundum brick is lifted off the support 310, the vent 610 is no longer blocked by pressure. The opening and closing component automatically resets and closes the side opening 620. The hot air in the lower chamber is concentrated and sprayed upward through the vent 610 via the air supply pipe 600. The vent 610 is directed towards the area originally blocked by the bottom side of the support 310, so that the sprayed hot air blows directly into the blocked blind area, thereby better achieving uniform heating of the entire bottom area of ​​the fused zirconia-corundum brick without dead angles.

[0032] It is worth noting that the connecting end of the fixed rod 530 passing through the lower chamber of the fixed cylinder 500 and the connecting end of the connecting rod 720 passing through the sliding cavity 700 can both be equipped with sealing structures (conventional means in existing technology). At the same time, when the equipment does not have airflow switching structures such as vent 610 and air supply pipe 600, the lower chamber of the fixed cylinder 500 does not need to be sealed.

[0033] In one specific embodiment of the present invention, the opening and closing assembly includes a first spring 630, which is disposed inside the side opening 620. One end of the first spring 630 near the vent 610 is fixedly connected to the inner wall of the side opening 620, and the other end of the first spring 630 is provided with a cover 640 outside the side opening 620. When the cover 640 is subjected to air pressure, it moves outward and pulls the first spring 630 to extend, thereby opening the port of the side opening 620 and allowing airflow. Conversely, when the air pressure decreases and is insufficient to overcome the rebound force of the first spring 630, the cover 640 resets and blocks the port, thereby closing the side opening 620.

[0034] When the piston valve 520 resets and moves upward within the fixed cylinder 500, the volume of the upper chamber rapidly decreases, and the hot airflow inside is pushed back through the drainage hole 510 and acts on the bottom side of the fused zirconia alumina brick above. At the same time, the volume of the lower chamber rapidly increases, and the hot airflow in the furnace is quickly replenished into the lower chamber through the vent hole 610 and the gas supply pipe 600. This process can again promote the circulation of hot airflow in the gap at the bottom of the fused zirconia alumina brick. Subsequently, multiple sets of top columns 710 descend synchronously, allowing the fused zirconia alumina brick to fall smoothly back onto the support seat 310. The piston valve 520 continues its upward stroke. At this time, the lower chamber is in a closed state, and the fused zirconia alumina brick presses against the vent hole 610 on the support seat 310. The space of the lower chamber continues to expand, further forming a negative pressure suction. Through the adsorption effect generated by the multiple sets of vent holes 610, the fused zirconia alumina brick can be tightly attracted and positioned on the support seat 310, thereby achieving stable placement of the fused zirconia alumina brick, effectively preventing displacement and shaking, and greatly ensuring safety and stability.

[0035] For details, please refer to the following: Figure 11It is known that a boss 650 is provided at the connection between the inner side of the cover 640 and the first spring 630, and a stepped groove 660 adapted to the boss 650 is provided at the port of the side opening 620. By the mutual engagement of the boss 650 and the stepped groove 660, the cover 640 can further achieve effective sealing of the port of the side opening 620.

[0036] Working principle and process: The fused zirconia-corundum bricks are placed sequentially on the support positions of the trolley 300. The support seats 310 on the support positions can lift the bricks off the top surface of the trolley 300, leaving most of the bottom area unobstructed and creating gaps for the flow of hot gas inside the furnace. Then, the trolley 300 is pushed into the annealing furnace 200 for annealing. During the annealing process, the drive assembly drives the piston valve 520 to slide rapidly down the inner wall of the fixed cylinder 500. In the first stage, the volume of the upper chamber increases rapidly, creating a suction effect, and the bricks are quickly drawn out through the drainage holes 510. The hot airflow inside the furnace causes the hot airflow to converge and flow towards the bottom gap of the fused zirconia-corundum brick. In the second stage, while the airflow continues to be drawn in and converges at the bottom gap, multiple sets of top columns 710 are driven to move synchronously upward along the sliding cavity 700 by the lifting unit. During this process, the opening and closing components are opened by air pressure to open the side opening 620, and the hot airflow in the lower chamber is quickly ejected from both sides of the support base 310. The hot airflow ejected from both sides can surround and act on the bottom periphery of the fused zirconia-corundum brick, further promoting the circulation of hot airflow at the bottom of the brick and improving the uniformity of bottom heating. In the third stage, multiple sets of top columns 710 rise synchronously and come into contact with the fused zirconia-alumina brick, thereby lifting the fused zirconia-alumina brick and causing it to detach from the support base 310. This further increases the gap between the bottom of the brick and the trolley 300, promoting rapid circulation of hot air. At the same time, it removes the partial obstruction area on the bottom side of the fused zirconia-alumina brick that the support base 310 originally blocked, allowing the hot air to fully cover all areas of the bottom of the brick. Meanwhile, the vent hole 610 is no longer blocked by pressure, and the opening and closing components automatically reset and close the side opening 620. The hot air in the lower chamber is concentrated and sprayed upward through the vent hole 610 via the air supply pipe 600. The vent hole 610 is directed towards the original obstruction area on the bottom side of the support base 310, so that the sprayed hot air blows directly into the obstruction blind area, achieving all-round uniform heating and annealing of the bottom of the fused zirconia-alumina brick. As the piston valve 520 resets and moves upward, the hot airflow in the upper chamber is pushed back through the drainage hole 510 and acts on the bottom side of the fused zirconia-alumina brick above. At the same time, the hot airflow in the furnace is quickly replenished into the lower chamber through the vent hole 610 and the gas supply pipe 600. This process can again promote the circulation of hot airflow in the gap at the bottom of the fused zirconia-alumina brick. After the top column 710 descends and the fused zirconia-alumina brick falls smoothly back onto the support seat 310, the piston valve 520 continues its upward stroke. The space in the lower chamber continues to expand, further forming a negative pressure suction. Through the adsorption of multiple sets of vent holes 610, the fused zirconia-alumina brick is tightly adsorbed and positioned on the support seat 310, achieving stable placement of the fused zirconia-alumina brick.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An annealing device for the production of electrically fused zirconia-corundum bricks, characterized in that include: The base (100) has an annealing furnace (200) on its top. A trolley (300) is slidably inserted into the inlet of the annealing furnace (200); Two support seats (310) are symmetrically arranged on the top side of the trolley (300) and form several support positions for placing the fused zirconia alumina brick, and make the top surface of the trolley (300) and the bottom side of the fused zirconia alumina brick form an airflow gap. The drainage unit includes several fixed cylinders (500), which are embedded in the bottom side of the trolley (300) and arranged corresponding to the support station. The top of the fixed cylinder (500) is connected to the trolley (300) with a drainage hole (510), and a piston valve (520) is installed inside it. The piston valve (520) divides the inside of the fixed cylinder (500) into an upper chamber and a lower chamber, and a first support member is provided at the bottom of the piston valve (520). A drive assembly, connected to the first support member, is used to drive the piston valve (520) to move axially; The lifting unit includes multiple sets of sliding cavities (700) and top columns (710). The sliding cavities (700) are symmetrically opened on the top of the trolley (300) and located on both sides of the fixed cylinder (500). The top columns (710) can be lifted and inserted into the sliding cavities (700), and a second support member is provided at its bottom end. A transmission mechanism is provided between the second support member and the first support member to convert the downward movement of the piston valve (520) into the upward movement of the top column (710).

2. The annealing device for producing electrically fused zirconia alumina brick according to claim 1, characterized in that, The drainage unit also includes: Multiple sets of ventilation holes (610) are symmetrically arranged on the top side of the support base (310) on each of the support positions; Several side openings (620) are symmetrically opened on both sides of the support base (310) in pairs and are connected to the vent (610). The side openings (620) are provided with opening and closing components to control the opening and closing of the side openings (620). Several gas supply pipes (600) are connected between the bottom end of the vent (610) and the bottom end of the lower chamber of the fixed cylinder (500). When the fused zirconia alumina brick is placed on the support (310), the piston valve (520) moves down to automatically open the side opening (620) of the opening and closing assembly, so that the hot air in the lower chamber is ejected through the side opening (620). When the fused zirconia alumina brick is lifted off the support (310) by the top column (710), the opening and closing assembly closes the side opening (620), so that the hot air in the lower chamber is ejected through the vent (610).

3. The annealing device for producing electrically fused zirconia alumina brick according to claim 1, characterized in that, The first support member includes a connecting arm (540) and a fixing rod (530). The connecting arm (540) is located below the fixing cylinder (500), and the top end of the connecting arm (540) is connected to the fixing rod (530). The bottom end of the connecting arm (540) is connected to the output end of the drive assembly. The top end of the fixing rod (530) extends into the fixing cylinder (500) and is fixedly connected to the piston valve (520).

4. The annealing device for producing electrically fused zirconia-alumina brick according to claim 3, characterized in that, The second support member includes a support frame (730) symmetrically arranged on both sides of the connecting arm (540). The top of the support frame (730) is provided with a plurality of connecting rods (720) facing the sliding cavity (700). The top of the connecting rods (720) extends into the sliding cavity (700) and is fixedly connected to the top column (710).

5. An annealing apparatus for producing fused zirconia-corundum bricks according to claim 4, characterized in that, The transmission mechanism includes a mounting frame (900) symmetrically arranged on the bottom side of the trolley (300) and located between the support frame (730) and the connecting arm (540). The bottom end of the mounting frame (900) is rotatably connected to a transmission gear (910). The side wall of the support frame (730) is provided with a first toothed plate (920) that meshes with the transmission gear (910). The connecting arm (540) is provided with a second toothed plate (930) on both sides. The connecting arm (540) is driven to descend by the drive assembly, so that the second toothed plate (930) can mesh with the transmission gear (910).

6. An annealing apparatus for producing fused zirconia-corundum bricks according to claim 3, characterized in that, A protective frame (400) is provided on the bottom side of the trolley (300) and outside the second support member and the first support member. The drive assembly is located inside the protective frame (400) and includes a cylinder (800). The bottom end of the cylinder (800) is fixedly connected to the protective frame (400), and its top push rod is fixedly connected to the connecting arm (540).

7. An annealing apparatus for producing fused zirconia-corundum bricks according to claim 4, characterized in that, The connecting rod (720) is fitted with a second spring (740), the bottom end of the second spring (740) is fixedly connected to the support frame (730), and the top end of the second spring (740) is fixedly connected to the trolley (300).

8. An annealing apparatus for producing fused zirconia-corundum bricks according to claim 2, characterized in that, The opening and closing assembly includes a first spring (630), which is located inside the side opening (620). One end of the first spring (630) near the vent (610) is fixedly connected to the inner wall of the side opening (620), and the other end of the first spring (630) is provided with a cover (640) outside the side opening (620).

9. An annealing apparatus for producing fused zirconia-corundum bricks according to claim 8, characterized in that, A boss (650) is provided at the connection between the inner side of the cover (640) and the first spring (630), and a stepped groove (660) adapted to the boss (650) is provided at the port of the side opening (620).

10. An annealing apparatus for producing fused zirconia-corundum bricks according to claim 1, characterized in that, The trolley (300) has multiple guide wheels arranged in an array on both sides of its bottom. The base (100) has guide rails symmetrically arranged on both sides of its top to match the guide wheels. The base (100) has a groove in the middle of its top side facing the protective frame (400).

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