A firing kiln that can fire multiple sizes of blanks simultaneously

Abstract

This utility model discloses a firing kiln for simultaneously firing multiple sizes of billets, including a frame; the frame is equipped with a heat-insulating cover and a conveying device along the front-to-back direction, the rear end of the conveying device is flush with the rear end of the heat-insulating cover, and the front end of the conveying device extends out of the heat-insulating cover; the portion of the conveying device extending out of the heat-insulating cover forms the drying zone of the billets, and the portion of the conveying device within the heat-insulating cover forms the firing zone of the billets; the conveying device has three billet receiving positions along the left-to-right direction, and three gate assemblies are provided at the bottom of the heat-insulating cover, with each gate corresponding to a billet receiving position, and the gate assemblies are used to adjust the firing temperature of the corresponding billet receiving position. The conveying device has three billet receiving positions along the left-to-right direction, allowing three sets of billets to be placed simultaneously into the firing zone, breaking the capacity limitations of traditional firing kilns, enabling the firing of more billets per unit time, and solving the problem of low output and the limitation of traditional firing kilns that can only fire one set of billets at a time.

Description

Technical Field

[0001] This utility model relates to the field of firing kiln technology, specifically a firing kiln that can simultaneously fire multiple sizes of blanks. Background Technology

[0002] Traditional firing kilns are typically designed with internal structures and heating systems optimized for green bodies of specific sizes. This means that during production, traditional firing kilns can only fire green bodies of a fixed size.

[0003] When faced with multiple blanks of different sizes, traditional kilns cannot accommodate blanks of different sizes for firing simultaneously, so enterprises can only adopt a batch firing method. That is, blanks of one size are loaded into the kiln and fired first. After this batch is fired, the finished product is removed from the kiln, and then blanks of another size are loaded into the kiln and fired, and so on.

[0004] Therefore, the batch firing method used by traditional kilns when dealing with multiple blanks of different sizes cannot meet the requirements of modern industrial production for high efficiency, energy saving and flexibility. Utility Model Content

[0005] To address the aforementioned shortcomings, this utility model proposes a firing kiln that can simultaneously fire multiple sizes of billets. The conveying device has three billet accommodating positions along the left and right directions, allowing three sets of billets to be placed simultaneously into the firing zone. This breaks the capacity limitation of traditional firing kilns, enabling the firing of more billets per unit time, significantly improving equipment utilization and batch production efficiency, and solving the problem of low output and the limitation of traditional firing kilns that can only fire one set of billets at a time.

[0006] To achieve this objective, the present invention adopts the following technical solution: A firing kiln for simultaneously firing multiple sizes of blanks, including a frame; The frame is provided with a heat insulation cover and a conveying device along the front-to-back direction. The rear end of the conveying device is flush with the rear end of the heat insulation cover, and the front end of the conveying device extends out of the heat insulation cover. The part of the conveying device that extends out of the heat insulation cover forms the drying zone of the billet, and the part of the conveying device located in the heat insulation cover forms the firing zone of the billet. The conveying device has three blank receiving positions along the left and right directions. The blank receiving positions are used to place blanks to be fired. The bottom of the heat preservation cover is provided with three gate assemblies. The gates correspond one-to-one with the blank receiving positions. The gate assemblies are used to adjust the firing temperature of the corresponding blank receiving positions.

[0007] The gate assembly includes, from front to back, a feed end gate, a preheating zone gate, a firing zone gate, and a cooling zone gate. The area between the feed end gate and the preheating zone gate is the preheating zone of the billet. The area between the preheating zone gate and the firing zone gate is the firing zone of the billet. The area between the firing zone gate and the cooling zone gate is the cooling zone of the billet.

[0008] The frame is also equipped with a combustion-supporting device, which includes a primary combustion-supporting component and a secondary combustion-supporting component. The air outlet of the primary combustion-supporting component is located at the top and bottom of the preheating zone and the firing zone, and the air outlet of the secondary combustion-supporting component is located at the top and bottom of the firing zone.

[0009] The frame is also equipped with a rapid cooling device, which is located on the cooling belt. The rapid cooling device includes a plurality of first rapid cooling pipes arranged side by side in the front-back direction. The length direction of the plurality of first rapid cooling pipes is the left-right direction. The top and bottom of the conveying device are both equipped with the first rapid cooling pipes.

[0010] The quenching device also includes three second quenching tubes, which are arranged side by side in the left-right direction. Each of the three second quenching tubes corresponds to one of the three blank receiving positions. The length direction of the second quenching tubes is the left-right direction.

[0011] Each of the billet receiving positions is provided with two speed regulating components. The two speed regulating components located at the same billet receiving position are respectively located in the preheating zone and the firing zone. The speed regulating components are used to adjust the conveying speed of each billet in the firing zone.

[0012] The speed regulating component includes a speed regulating roller shaft and a driving component. The left and right ends of the speed regulating roller shaft are rotatably connected to the frame, respectively. The driving component is installed on the frame, and the driving end of the driving component is fixedly connected to the end of the speed regulating roller shaft. The speed regulating roller shaft is fixedly sleeved with the speed regulating roller sleeve. The speed regulating roller sleeve is disposed at the left, middle or right end of the speed regulating roller shaft.

[0013] The speed regulating roller sleeve is cylindrical or conical.

[0014] The frame is also equipped with a tail-cooling exhaust fan. The air inlet of the tail-cooling exhaust fan is located in the cooling zone, and the air outlet of the tail-cooling exhaust fan is connected to a heat exchanger. The air outlet of the heat exchanger is located at the bottom of the drying zone.

[0015] The technical solution of this utility model can include the following beneficial effects: 1. The conveying device has three blank receiving positions along the left and right directions, which can simultaneously place three sets of blanks into the firing zone. This breaks the capacity limitation of traditional firing kilns, and can complete the firing of more blanks per unit time, significantly improving equipment utilization and batch production efficiency. It also solves the problem of low output of traditional firing kilns, which can only fire one set of blanks at a time.

[0016] 2. When firing blanks of different sizes at the same time, the opening and closing degree of the gate on the blank receiving position can be adjusted individually to provide a suitable temperature environment for the blanks in each blank receiving position. This avoids overfiring, underfiring or cracking of some blanks due to "uniform temperature control", effectively ensuring the firing qualification rate and product quality stability of various blanks. Attached Figure Description

[0017] Figure 1 This is a side view of a firing kiln according to one embodiment of the present invention; Figure 2 This is a top view of a conveying device according to one embodiment of the present invention; Figure 3 This is a schematic diagram of a combustion-supporting device according to one embodiment of the present invention; Figure 4 This is a schematic diagram of a rapid cooling device according to one embodiment of the present invention; Figure 5 This is a schematic diagram of a speed regulating device according to one embodiment of the present invention; The components include: 1. Frame; 2. Insulation cover; 21. Drying zone; 22. Firing zone; 23. Preheating zone; 24. Firing belt; 25. Cooling belt; 3. Conveying device; 4. Gate assembly; 41. Feed end gate; 42. Preheating zone gate; 43. Firing belt gate; 44. Cooling belt gate; 5. Combustion aid device; 51. Primary combustion aid assembly; 52. Secondary combustion aid assembly; 6. Rapid cooling device; 61. First rapid cooling pipe; 62. Second rapid cooling pipe; 7. Speed ​​regulating assembly; 71. Drive component; 72. Speed ​​regulating roller; 73. Speed ​​regulating roller; 8. Tail cooling exhaust fan; 81. Heat exchanger. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] In the description of this utility model, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "assembly," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following is combined with Figures 1 to 5 This describes a firing kiln that can simultaneously fire multiple sizes of blanks according to an embodiment of the present invention.

[0023] A firing kiln for simultaneously firing multiple sizes of billets includes a frame 1; the frame 1 is provided with a heat-insulating cover 2 and a conveying device 3 along the front-to-back direction, the rear end of the conveying device 3 is flush with the rear end of the heat-insulating cover 2, and the front end of the conveying device 3 extends out of the heat-insulating cover 2; the portion of the conveying device 3 extending out of the heat-insulating cover 2 forms a drying zone 21 for the billets, and the portion of the conveying device 3 located within the heat-insulating cover 2 forms a firing zone 22 for the billets. The conveying device 3 has three blank receiving positions along the left and right directions. The blank receiving positions are used to place blanks to be fired. The bottom of the heat insulation cover 2 is provided with three gate assemblies 4. The gates correspond one-to-one with the blank receiving positions. The gate assembly 4 is used to adjust the firing temperature of the corresponding blank receiving position.

[0024] The conveying device 3 is divided into a "drying zone 21" extending out of the insulation cover 2 and a "firing zone 22" located inside the cover. This allows the green body to be dried before firing, removing moisture from its surface and interior. The drying zone 21 is open, allowing the surface moisture of the green body to evaporate quickly before firing, reducing defects such as cracking and deformation caused by unremoved moisture during firing, thus providing a good foundation for subsequent firing steps. Furthermore, workers can directly observe the condition of the green bodies within the drying zone 21, promptly identifying and addressing any defective bricks, preventing them from entering the firing zone 22 and affecting the normal firing process, thereby reducing energy waste and equipment wear.

[0025] The conveying device 3 has three blank receiving positions along the left and right directions, which can simultaneously place three sets of blanks into the firing zone 22. This breaks the capacity limitation of traditional firing kilns, and can complete the firing of more blanks per unit time, significantly improving equipment utilization and batch production efficiency. It also solves the problem of low output of traditional firing kilns, which can only fire one set of blanks at a time.

[0026] Three sets of gate assemblies 4 are installed at the bottom of the heat insulation cover 2. Each set of gate assemblies 4 is correspondingly set at the blank receiving position, so that the firing temperature of the corresponding receiving position can be adjusted independently by each set of gate assemblies 4. When blanks of different sizes are fired at the same time, the opening and closing degree of the gate on the blank receiving position can be adjusted individually to provide a suitable temperature environment for the blanks in each blank receiving position. This avoids over-firing, under-firing or cracking of some blanks due to "uniform temperature control", effectively ensuring the firing qualification rate and finished product quality stability of various blanks.

[0027] The heat insulation cover 2 provides a closed heat insulation environment for the firing zone 22, reducing heat loss to the outside and reducing the temperature fluctuation range inside the kiln. Combined with the fine adjustment function of the independent gate assembly 4, the temperature of each green body can be maintained within a precise range, further improving the uniformity and consistency of the green body firing.

[0028] The gate assembly 4 includes, from front to back, a feed end gate 41, a preheating zone gate 42, a firing zone gate 43, and a cooling zone gate 44. The area between the feed end gate 41 and the preheating zone gate 42 is the preheating zone 23 of the billet. The area between the preheating zone gate 42 and the firing zone gate 43 is the firing zone 24 of the billet. The area between the firing zone gate 43 and the cooling zone gate 44 is the cooling zone 25 of the billet.

[0029] The firing process of the green body involves stages of preheating, firing, and cooling, with significant differences in the requirements for temperature, heating rate, and holding time at each stage. By dividing the firing zone 22 into a preheating zone 23, a firing zone 24, and a cooling zone 25 using the feed gate 41, preheating zone gate 42, firing zone gate 43, and cooling zone gate 44, the temperature of each zone can be independently adjusted via the corresponding gate. This ensures that the temperature control perfectly matches the physicochemical properties of the green body at each stage, guaranteeing firing quality from the source of the process. For example, by adjusting the gates, the preheating zone 23 can be controlled to slowly heat up to remove moisture and volatiles from the green body; the firing zone 24 can maintain a high temperature to achieve sintering of the green body; and the cooling zone 25 can control the cooling rate to prevent cracking caused by thermal stress.

[0030] The segmented design of the gate assembly 4 effectively blocks heat flow between zones, preventing fluctuations caused by temperature interference between different areas. Simultaneously, by adjusting the opening and closing degrees of different gates, the temperature gradient of each zone can be precisely controlled, ensuring that the billet does not experience internal stress due to sudden temperature changes during the transition phase, thus reducing defects such as deformation and cracking.

[0031] The frame 1 is also provided with a combustion-supporting device 5, which includes a primary combustion-supporting component 51 and a secondary combustion-supporting component 52. The air outlet of the primary combustion-supporting component 51 is located at the top and bottom of the preheating zone 23 and the firing zone 24, and the air outlet of the secondary combustion-supporting component 52 is located at the top and bottom of the firing zone 24.

[0032] The primary combustion aid component 51 covers the preheating zone 23 and the firing zone 24, while the secondary combustion aid component 52 focuses on the firing zone 24, forming a gradient heat supply system. The preheating zone 23 requires gentle and stable heat to slowly remove moisture and volatiles from the green body. The primary combustion aid component 51 provides basic heat to prevent the green body from cracking due to excessively rapid heating. The firing zone 24 requires high-temperature sintering enhancement, and the secondary combustion aid component 52 supplements the heat on this basis to ensure that the sintering temperature threshold of the green body is reached. This graded design allows the heat supply to be precisely matched with the stage characteristics of the stable temperature of the preheating zone 23 and the high temperature of the firing zone 24, avoiding the problem of excessive or insufficient heat caused by a single combustion aid.

[0033] The air outlets of the primary combustion aid component 51 and the secondary combustion aid component 52 are both located at the top and bottom of the corresponding zones, forming a top-and-bottom heating mode. This effectively eliminates the problem of temperature difference between the top and bottom caused by traditional single-sided heating, ensuring that the blanks in each blank-containing position are heated evenly and reducing defects such as deformation and uneven sintering caused by local temperature differences.

[0034] The frame 1 is also provided with a rapid cooling device 6, which is located on the cooling belt 25. The rapid cooling device 6 includes a plurality of first rapid cooling pipes 61 arranged side by side in the front-back direction. The length direction of the plurality of first rapid cooling pipes 61 is the left-right direction. The top and bottom of the conveying device 3 are provided with the first rapid cooling pipes 61.

[0035] Multiple first quench pipes 61 are arranged side by side in the front-to-back direction to form a fully covered, relay-type cooling zone. As the billet moves along the front-to-back direction with the conveying device 3, it passes through multiple first quench pipes 61 in sequence and is continuously cooled, thereby rapidly reducing the temperature of the billet.

[0036] The rapid cooling device 6 also includes three second rapid cooling pipes 62, which are arranged side by side in the left-right direction. The three second rapid cooling pipes 62 correspond one-to-one with the three blank receiving positions, and the length direction of the second rapid cooling pipes 62 is the left-right direction.

[0037] Because the second quench tubes 62 are arranged side by side in the left-right direction and each corresponds to an independent receiving position, adjusting the parameters of one of the second quench tubes 62 will not affect the cooling environment of the right or middle receiving positions. For example, when the left receiving position is used to fire a billet that requires rapid cooling and the right receiving position is used to fire a billet that requires slow cooling, the output of the corresponding second quench tube 62 can be adjusted separately to ensure the stability of simultaneous cooling of multiple billets of different specifications. This effectively solves the problem that traditional integral firing kilns cannot cool multiple billets of different specifications during the cooling process, ensuring that each billet can complete stress release and performance curing under optimal cooling conditions.

[0038] Each of the billet receiving positions is provided with two speed regulating components 7. The two speed regulating components 7 located in the same billet receiving position are respectively located in the preheating zone 23 and the firing zone 24. The speed regulating components 7 are used to adjust the conveying speed of each billet in the firing zone 22.

[0039] When a blank holder has a localized void, no blank absorbs heat in that void, which can easily lead to an abnormal temperature rise in that area. In this case, the speed control component 7 at the corresponding holder can adjust the conveying speed of the blank, allowing the blank to be replaced to quickly enter the void area. This enables the blank to rapidly absorb heat from the blank holder area, preventing the overheated zone from persisting and thus preventing the high temperature in the void area from spreading to adjacent holders. This ensures a uniform temperature field throughout the firing zone 22 and guarantees that the firing temperature of other blanks always meets the preset process requirements.

[0040] The speed regulating component 7 includes a speed regulating roller shaft 72 and a driving component 71. The left and right ends of the speed regulating roller shaft 72 are rotatably connected to the frame 1, respectively. The driving component 71 is installed on the frame 1. The driving end of the driving component 71 is fixedly connected to the end of the speed regulating roller shaft 72. The speed regulating roller shaft 72 is fixedly sleeved with the speed regulating roller sleeve 73. The speed regulating roller sleeve 73 is set at the left, middle or right end of the speed regulating roller shaft 72.

[0041] The speed-regulating roller sleeve 73 is located at the left, middle, or right end of the speed-regulating roller shaft 72, corresponding one-to-one with the three billet receiving positions, ensuring that each speed-regulating roller sleeve 73 only acts on the corresponding billet receiving position. When the billet conveying speed in one billet receiving position is adjusted, it will not affect the conveying speed of the other two receiving positions.

[0042] In the speed regulating assembly 7, the speed regulating roller sleeve 73 is fixedly fitted onto the speed regulating roller shaft 72, ensuring that the rotation centers of the speed regulating roller shaft 72 and the speed regulating roller sleeve 73 completely coincide. Therefore, under the drive of the drive component 71, the angular velocities of the speed regulating roller shaft 72 and the speed regulating roller sleeve 73 remain consistent. However, within the same rotation cycle, the circumferential trajectory length of the contact points on the surface of the speed regulating roller sleeve 73 is longer, resulting in a correspondingly higher surface linear velocity; while the trajectory length of the contact points on the surface of the base area of ​​the speed regulating roller shaft 72 is shorter, resulting in a relatively lower linear velocity. Consequently, on the same speed regulating roller shaft 72, the linear velocity of the speed regulating roller sleeve 73 area is higher than that of the base area.

[0043] The speed regulating roller sleeve 73 is cylindrical or conical.

[0044] The cylindrical structure ensures that the distance from each point on the surface of the speed-regulating roller sleeve 73 to the axis of rotation is completely consistent, allowing the surface of the cylindrical speed-regulating roller sleeve 73 to maintain the same conveying speed. When the bottom of the billet contacts the cylindrical speed-regulating roller sleeve 73, the billet will not experience local speed differences due to differences in the contact position, thus preventing the billet from shifting its position.

[0045] If the billet is prone to angular deviation during firing, the operator can use a conical speed-regulating roller sleeve 73. The surface linear velocity of the conical speed-regulating roller sleeve 73 changes linearly with the outer diameter gradient, causing the surface linear velocity of the conical speed-regulating roller sleeve 73 to gradually increase from one end to the other. When the billet with angular deviation shifts towards the smaller diameter end of the conical speed-regulating roller sleeve 73, the side closer to the smaller diameter end contacts the low linear velocity region, and the side closer to the larger diameter end contacts the high linear velocity region. The velocity difference between the two sides creates a gentle pulling force along the direction from the smaller diameter end to the larger diameter end, gradually pushing the billet back to the preset trajectory.

[0046] The frame 1 is also equipped with a tail-cooling exhaust fan 8. The air inlet of the tail-cooling exhaust fan 8 is located in the cooling zone 25, and the air outlet of the tail-cooling exhaust fan 8 is connected to a heat exchanger 81. The air outlet of the heat exchanger 81 is located at the bottom of the drying zone 21.

[0047] The air inlet of the tail-cooling exhaust fan 8 is located in the cooling zone 25, which can directionally extract the high-temperature waste heat air in the cooling zone 25 and transfer the originally wasted heat to the heat exchanger 81. The heat exchanger 81 can filter impurities in the waste heat air to prevent dust from affecting the drying quality of the billet, and then directionally transport the recovered heat to the bottom of the drying zone 21, which greatly reduces additional energy consumption and lowers equipment operating costs.

[0048] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A firing kiln for simultaneously firing multiple sizes of blanks, characterized in that, Including racks; The frame is provided with a heat insulation cover and a conveying device along the front-to-back direction. The rear end of the conveying device is flush with the rear end of the heat insulation cover, and the front end of the conveying device extends out of the heat insulation cover. The part of the conveying device that extends out of the heat insulation cover forms the drying zone of the billet, and the part of the conveying device located in the heat insulation cover forms the firing zone of the billet. The conveying device has three blank receiving positions along the left and right directions. The blank receiving positions are used to place blanks to be fired. The bottom of the heat preservation cover is provided with three gate assemblies. The gates correspond one-to-one with the blank receiving positions. The gate assemblies are used to adjust the firing temperature of the corresponding blank receiving positions.

2. The firing kiln for simultaneously firing multiple sizes of billets according to claim 1, characterized in that, The gate assembly includes, from front to back, a feed end gate, a preheating zone gate, a firing zone gate, and a cooling zone gate. The area between the feed end gate and the preheating zone gate is the preheating zone of the billet. The area between the preheating zone gate and the firing zone gate is the firing zone of the billet. The area between the firing zone gate and the cooling zone gate is the cooling zone of the billet.

3. The firing kiln for simultaneously firing multiple sizes of billets according to claim 2, characterized in that, The frame is also equipped with a combustion-supporting device, which includes a primary combustion-supporting component and a secondary combustion-supporting component. The air outlet of the primary combustion-supporting component is located at the top and bottom of the preheating zone and the firing zone, and the air outlet of the secondary combustion-supporting component is located at the top and bottom of the firing zone.

4. A firing kiln for simultaneously firing multiple sizes of billets according to claim 3, characterized in that, The frame is also equipped with a rapid cooling device, which is located on the cooling belt. The rapid cooling device includes a plurality of first rapid cooling pipes arranged side by side in the front-back direction. The length direction of the plurality of first rapid cooling pipes is the left-right direction. The top and bottom of the conveying device are both equipped with the first rapid cooling pipes.

5. A firing kiln for simultaneously firing multiple sizes of billets according to claim 4, characterized in that, The quenching device also includes three second quenching tubes, which are arranged side by side in the left-right direction. Each of the three second quenching tubes corresponds to one of the three blank receiving positions. The length direction of the second quenching tubes is the left-right direction.

6. A firing kiln for simultaneously firing multiple sizes of billets according to claim 3, characterized in that, Each of the billet receiving positions is provided with two speed regulating components. The two speed regulating components located at the same billet receiving position are respectively located in the preheating zone and the firing zone. The speed regulating components are used to adjust the conveying speed of each billet in the firing zone.

7. A firing kiln for simultaneously firing multiple sizes of billets according to claim 4, characterized in that, The speed regulating component includes a speed regulating roller shaft and a driving component. The left and right ends of the speed regulating roller shaft are rotatably connected to the frame, respectively. The driving component is installed on the frame, and the driving end of the driving component is fixedly connected to the end of the speed regulating roller shaft. The speed regulating roller shaft is fixedly sleeved with the speed regulating roller sleeve. The speed regulating roller sleeve is disposed at the left, middle or right end of the speed regulating roller shaft.

8. A firing kiln for simultaneously firing multiple sizes of billets according to claim 7, characterized in that, The speed regulating roller sleeve is cylindrical or conical.

9. A firing kiln for simultaneously firing multiple sizes of billets according to claim 8, characterized in that, The frame is also equipped with a tail-cooling exhaust fan. The air inlet of the tail-cooling exhaust fan is located in the cooling zone, and the air outlet of the tail-cooling exhaust fan is connected to a heat exchanger. The air outlet of the heat exchanger is located at the bottom of the drying zone.

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