Double-layer kiln with double-track external circulation line

Abstract

The present invention relates to the field of kiln devices. Disclosed is a double-layer kiln with a double-track external circulation line. In the present invention, an inner track line and an outer track line work together with a lower kiln body and an upper kiln body to cyclically transport saggers that carry blanks to be fired, and the saggers and the blanks are moved and transported to kiln feed ports for loading, without requiring manual movement or transport of the saggers and the blanks for loading, so that the manual labor intensity can be reduced, and the loading efficiency and the kiln working efficiency are improved; the saggers can be exchanged and transported between the inner track line and the outer track line by means of direction switching mechanisms, and when the required kiln firing time is short and the loading frequency is high, the inner track line and the outer track line are respectively used to perform loading and unloading for the lower kiln body and upper kiln body, so that the kiln loading and unloading requirements are satisfied; and when the firing time of the blanks is long and the loading frequency is low, a main conveyor line of the inner track line can be shut down, only a main conveyor line of the outer track line is used together with other conveyor lines to perform loading and unloading for the two kiln bodies, so as to achieve the objective of saving energy.

Description

A double-layer kiln with a double-track outer circulation line

[0001] This invention claims priority to the Chinese patent application filed with the Patent Office of China on November 21, 2023, with application number 202311554681.1 and invention name “A double-layer kiln with a double-track outer circulation line”. The entire contents of the application are incorporated herein by reference. Technical Field

[0002] The present invention belongs to the field of kiln equipment, and in particular relates to a double-layer kiln with a double-track outer circulation line. Background Art

[0003] Traditional electric kilns mostly operate in a single channel, one-way, with the product passing through a preheating zone, a heating zone, a high-temperature zone, a holding zone, and a cooling zone within the kiln. Heating tubes are located on both sides of the firing channel to heat the product within the kiln. These kilns are widely used for sintering structural ceramics, functional ceramics, phosphors, rare earth materials, lithium battery materials, magnetic materials, nanomaterials, and other products. However, these electric kilns suffer from low heat utilization and high energy consumption during the heating process. Improving the kiln's energy efficiency has become a key focus of energy conservation and emission reduction efforts across various industries.

[0004] Chinese patent CN205262173U discloses a double-layer sintering kiln, including a kiln, wherein the middle insulation layer divides the kiln into two layers, and each layer has a preheating zone, a high-temperature zone, and a cooling zone in sequence. The high-temperature zones of the upper and lower layers are located in the middle section of the kiln, the upper preheating zone and the lower cooling zone are located on the right side of the kiln, and the lower preheating zone and the upper cooling zone are located on the left side of the kiln. Each cooling zone is equipped with a cooling blower. The upper cooling zone is also equipped with a cooling exhaust blower to send the cooling hot air to the lower preheating zone, while the lower cooling zone has holes in the middle insulation layer to send the hot air to the upper preheating zone. Each preheating zone is equipped with a dehumidification blower, each section of the kiln is equipped with a roller conveyor, and there are walking platforms at both ends of the kiln. This double-layer sintering kiln can achieve the technical purpose of saving energy. However, during the operation of the kiln, the blanks to be fired generally need to be carried by a sagger, and then the sagger and the blanks need to be transported by a conveyor line. After the kiln has fired the blanks into shape, the finished product in the sagger needs to be removed and a new blank needs to be put in, and the firing process needs to be repeated. However, in the above patent, only a conveyor line is provided at the inlet and outlet of the kiln for feeding in and out of the kiln, but the sagger cannot be circulated. As a result, after the blanks are fired and formed, the staff needs to remove the sagger and the finished product at the outlet of the kiln. After the new blanks are put in the sagger, the sagger and the blanks need to be manually moved and transported to the inlet of the kiln for loading. This increases the labor intensity and reduces the working efficiency of the kiln.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide a double-layer kiln with a double-track outer circulation line to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] In order to solve the above technical problems, the present invention provides a double-layer kiln with a double-track outer circulation line, including a lower furnace body and an upper furnace body arranged in double layers from bottom to top, an inner track line is installed between the inlet and outlet of the lower furnace body, and an outer track line is installed between the inlet and outlet of the upper furnace body. A circulating conveying line is formed between the lower furnace body and the inner track line, and between the upper furnace body and the outer track line, which is used for circulating the sagger carrying the fired blanks.

[0008] The inner track line includes an inner track main conveying line and an inner track feeding and discharging line, and the outer track line includes an outer track main conveying line and an outer track feeding and discharging line. Both ends of the inner track main conveying line and the outer track main conveying line are connected through a reversing mechanism, so that the two groups of circulating conveying lines are connected to each other, and the saggers can be exchanged and transported between the two groups of circulating conveying lines.

[0009] The reversing mechanism includes a frame, a transverse conveying roller group, a longitudinal conveying roller group and a lifting assembly. The transverse conveying roller group and the longitudinal conveying roller group are staggered and distributed on the top surface of the frame, and the longitudinal conveying roller group is installed on the frame through the lifting assembly.

[0010] In one embodiment, the inner track feed and unloading line includes an inner track feed line arranged at the feed end of the lower furnace body and an inner track discharging line located at the discharging end of the lower furnace body. The two sides of the feed end of the inner track feed line are respectively connected to the inner track main conveying line and the reversing mechanism, and the discharging end of the inner track discharging line is connected to another set of reversing mechanisms.

[0011] In one embodiment, the outer track feed and discharge lines include an outer track feed line located at the upper furnace body feed port and an outer track discharge line located at the upper furnace body discharge port. A discharge hoist is installed at the end of the outer track discharge line, one end of which is connected to the outer track main conveyor line. The end of the outer track main conveyor line is connected to a reversing mechanism, one side of which is connected to a feed adapter line, and a feed elevator is installed between the feed adapter line and the outer track feed line.

[0012] In one embodiment, the transverse conveying roller group includes multiple roller shafts, multiple transverse conveying roller grooves and a transverse conveying drive unit. The multiple transverse conveying roller grooves are evenly distributed and opened on the top surface of the frame. Multiple roller shafts are rotatably installed in each of the transverse conveying roller grooves. The multiple roller shafts rotate synchronously under the drive of the transverse conveying drive unit.

[0013] In one embodiment, the transverse conveying drive unit includes a main shaft, a transverse conveying motor, and a plurality of first driven wheels. The main shaft is rotatably mounted on one side of the frame and is perpendicular to the transverse conveying roller groove. The transverse conveying motor is fixedly mounted on one side of the frame and is drivingly connected to one end of the main shaft. The main shaft is fixedly mounted with a plurality of first driving wheels corresponding one-to-one to the transverse conveying roller grooves. The plurality of first driven wheels are respectively fixedly mounted to one end of a plurality of roller shafts. The first driving wheels are connected to the plurality of first driven wheels in the corresponding transverse conveying roller grooves via a first transmission belt.

[0014] In one embodiment, the longitudinal conveying roller assembly includes a plurality of rollers and a plurality of longitudinal conveying roller grooves. The plurality of longitudinal conveying roller grooves are evenly spaced and disposed on the top surface of the frame, and the plurality of longitudinal conveying roller grooves are staggered with the plurality of transverse conveying roller grooves. Each longitudinal conveying roller groove has end plates slidably mounted at both ends thereof, and the roller is rotatably mounted between the two end plates.

[0015] In one embodiment, the lifting assembly includes a support plate, which is fixedly mounted on the upper end of the frame, a lifting column is fixedly mounted on the top surface of the support plate, a lifting plate is fixedly mounted on the top end of the lifting column, and the bottom end of the end plate is fixedly mounted on the top surface of the lifting plate.

[0016] In one embodiment, a transmission trough is defined on one side of the frame, extending perpendicularly to the longitudinal conveying roller trough. The transmission trough and the longitudinal conveying roller trough are connected via a lifting chute. One end of each roller extends through the lifting chute into the transmission trough, and a synchronous pulley is fixedly mounted on the end of each roller. The multiple synchronous pulleys are connected via a synchronous belt. A longitudinal conveying motor is fixedly mounted on the top surface of the lifting plate. A second driving pulley is mounted on the output shaft of the longitudinal conveying motor. A second driven pulley is fixedly mounted on the end of one of the rollers. The second driving pulley and the second driven pulley are connected via a second transmission belt.

[0017] In one embodiment, the frame is further equipped with a locking mechanism for clamping and limiting the roller. The locking mechanism includes a positioning plate and a lifting slider. The lifting slider is slidably mounted within a lifting chute and is rotatably connected to the end of the roller. The positioning plate is fixedly mounted on the upper end of the lifting chute. A lifting shaft is slidably mounted on the positioning plate. A bottom plate is fixedly mounted on the bottom of the lifting shaft. A lifting seat is fixedly mounted on the top of the lifting shaft. Connecting rods are rotatably mounted on both ends of the lifting seat. One end of the connecting rod is tilted upward and rotatably connected to a lever. The lever is rotatably mounted on the frame, and the bottom end of the lever is rotatably mounted to a clamping block located on one side of the lifting chute.

[0018] In one embodiment, the lower end of the lifting shaft is sleeved with a spring that abuts between the positioning plate and the bottom plate.

[0019] The present invention has the following beneficial effects:

[0020] 1. In the present invention, an inner track line is installed between the inlet and outlet of the lower furnace body, and an outer track line is installed between the inlet and outlet of the upper furnace body, so that a circulating conveying line is formed between the lower furnace body and the inner track line, as well as between the upper furnace body and the outer track line, for circulating the saggers carrying the fired blanks, and moving the saggers and the blanks to the kiln feed port for loading, without the need for manual movement and transportation of the saggers and blanks for loading, which can reduce manual labor intensity and improve loading efficiency and kiln working efficiency.

[0021] 2. In the present invention, both ends of the inner track main conveyor line and the outer track main conveyor line are connected by a reversing mechanism, so that the two groups of circulating conveyor lines are connected to each other, and the saggers can be exchanged and conveyed between the two groups of circulating conveyor lines. When the time required for kiln firing is short and the loading frequency is fast, the inner track line and the outer track line are used to load and unload the lower furnace body and the upper furnace body respectively to meet the kiln loading and unloading needs; when the firing time is long and the loading frequency is slow, the main conveyor line of the inner track line can be shut down, and only the main conveyor line of the outer track line is used to cooperate with other conveyor lines to load and unload the two kilns, thereby achieving the purpose of saving energy.

[0022] 3. The longitudinal conveying roller group of the reversing mechanism in the present invention is mounted on the frame via a lifting assembly. When the sagger and blank are being conveyed by the transverse conveying roller group, the lifting assembly drives the longitudinal conveying roller group downward to a position lower than the transverse conveying roller group, thereby preventing the longitudinal conveying roller group from interfering with the transverse conveying roller group. Accordingly, when the longitudinal conveying roller group is conveying the sagger and blank, the lifting assembly drives the longitudinal conveying roller group upward to a position higher than the transverse conveying roller group. The lifting assembly adjusts the height of the longitudinal conveying roller group, enabling the longitudinal conveying roller group and the transverse conveying roller group to be staggered vertically, preventing the frictional resistance of the other roller group from interfering with the conveying of the sagger when the transverse conveying roller group and the longitudinal conveying roller group are in operation, thereby ensuring that the reversing mechanism can stably convey the sagger and blank.

[0023] 4. In the present invention, a locking mechanism is installed on the frame for clamping and limiting the rollers in the longitudinal conveying roller group. When the longitudinal conveying roller group moves upward for conveying, the locking mechanism clamps and limits the lifting slider where the rollers are located, thereby improving the stability of the installation of the lifting slider and the rollers, and further improving the conveying stability of the longitudinal conveying roller group, preventing the longitudinal conveying roller group from shaking during conveying.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, they can also obtain drawings based on these drawings without paying any creative work.

[0026] FIG1 is a schematic diagram of the three-dimensional structure of a double-layer kiln of the present invention;

[0027] FIG2 is a schematic diagram of a partially enlarged structure of point A in FIG1 of the present invention;

[0028] FIG3 is a schematic diagram of the three-dimensional structure of the reversing mechanism in the double-layer kiln of the present invention;

[0029] FIG4 is a schematic diagram of a three-dimensional cross-section structure of a reversing mechanism of the present invention;

[0030] FIG5 is a schematic diagram of a partially enlarged structure of point B in FIG4 of the present invention;

[0031] FIG6 is a schematic diagram of a partially enlarged structure of point C in FIG4 of the present invention;

[0032] FIG7 is a second schematic diagram of a three-dimensional cross-sectional structure of the reversing mechanism of the present invention;

[0033] FIG8 is a schematic diagram of a partially enlarged structure of point D in FIG7 of the present invention;

[0034] FIG9 is a schematic diagram of the installation structure of the longitudinal conveying roller group in the reversing mechanism of the present invention on the frame;

[0035] FIG10 is a schematic diagram of a partially enlarged structure of point E in FIG9 of the present invention. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention.

[0038] Please refer to Figures 1 and 2. The present invention is a double-layer kiln with a double-track outer circulation line, including a lower furnace body 1 and an upper furnace body 2 arranged in a double layer from bottom to top. An inner track line 3 is installed between the inlet and outlet of the lower furnace body 1, and an outer track line 4 is installed between the inlet and outlet of the upper furnace body 2. A circulating conveying line is formed between the lower furnace body 1 and the inner track line 3, as well as between the upper furnace body 2 and the outer track line 4, for circulating the saggers carrying the fired blanks. The inner track line 3 includes an inner track main conveying line 31 and an inner track inlet and outlet line, and the outer track line 4 includes an outer track main conveying line 41 and an outer track inlet and outlet line. Both ends of the inner track main conveying line 31 and the outer track main conveying line 41 are connected by a reversing mechanism 5, so that the two groups of circulating conveying lines are connected to each other, and the saggers can be exchanged and conveyed between the two groups of circulating conveying lines. The reversing mechanism 5 includes a frame 51, a transverse conveying roller group, a longitudinal conveying roller group and a lifting assembly. The transverse conveying roller group and the longitudinal conveying roller group are staggered on the top surface of the frame 51, and the longitudinal conveying roller group is installed on the frame 51 through the lifting assembly.

[0039] In the present invention, the inner track 3 and outer track 4 cooperate with the lower furnace body 1 and the upper furnace body 2 to circulate the saggers carrying the fired blanks, moving the saggers and blanks to the kiln feed port for loading, eliminating the need for manual movement and transportation of the saggers and blanks for loading. This can reduce labor intensity and improve loading efficiency and kiln operating efficiency. The reversing mechanism 5 exchanges the saggers between the inner track 3 and the outer track 4. When the kiln firing time is short and the loading frequency is high, the inner track 3 and the outer track 4 respectively load and unload the blanks to meet the kiln loading and unloading needs. When the blank firing time is long and the loading frequency is slow, the main conveyor line of the inner track 3 can be shut down, and only the main conveyor line of the outer track 4 cooperates with other conveyor lines to load and unload the two kilns, thereby achieving the purpose of saving energy. When the transverse conveying roller group within the reversing mechanism 5 conveys the saggers and blanks, the lifting assembly drives the longitudinal conveying roller group to move down to a position lower than the transverse conveying roller group. Correspondingly, when the sagger blank is transported by the longitudinal conveying roller group, the longitudinal conveying roller group is driven by the lifting assembly to move up to a position higher than the transverse conveying roller group, and the height of the longitudinal conveying roller group is adjusted by the lifting assembly, so that the longitudinal conveying roller group and the transverse conveying roller group can be staggered up and down, thereby preventing the friction resistance of the other roller group from interfering with the conveying of the sagger when the transverse conveying roller group and the longitudinal conveying roller group are conveying, thereby ensuring that the reversing mechanism 5 can stably convey the sagger and the blank.

[0040] Referring to Figure 1 , in one embodiment, the inner track feed and discharge lines include an inner track feed line 32 located at the feed end of the lower furnace body 1 and an inner track discharge line 33 located at the discharge end of the lower furnace body 1 . The feed end of the inner track feed line 32 is connected to the inner track main conveyor line 31 and the reversing mechanism 5 on both sides. The discharge end of the inner track discharge line 33 is connected to another set of reversing mechanisms 5 . When loading and unloading materials are transported separately via the two tracks, the reversing mechanism 5 uses a transverse conveyor roller set to transport the saggers transported from the inner track discharge line 33 to the inner track main conveyor line 31 . After loading materials from the inner track main conveyor line 31 , the inner track feed line 32 transports the saggers and blanks into the lower furnace body 1 for firing. If only one track is in operation and the inner track main conveyor line 31 is shut down, the reversing mechanism 5 uses a longitudinal conveyor roller set to transport the saggers from the inner track discharge line 33 to the outer track main conveyor line 41 . After loading on the outer track main conveyor line 41 , the reversing mechanism 5 at the end of the outer track main conveyor line 41 conveys the material to the inner track feeding line 32 , and finally the inner track feeding line 32 conveys the sagger and the blank to the lower furnace body 1 for firing.

[0041] Please refer to Figure 1. In one embodiment, the outer track feeding and unloading line includes an outer track feeding line 44 provided at the feeding port of the upper furnace body 2 and an outer track discharging line 45 provided at the discharging port of the upper furnace body 2. A discharging lifting frame 46 is installed at the end of the outer track discharging line 45. One end of the discharging lifting frame 46 is connected to the outer track main conveying line 41; the end of the outer track main conveying line 41 is connected to the reversing mechanism 5. A feeding adapter line 42 is connected to one side of the reversing mechanism 5, and a feeding lifting frame 43 is installed between the feeding adapter line 42 and the outer track feeding line 44. The saggers on the outer circulation line are circulated and transported between the outer track main conveying line 41, the reversing mechanism 5, the feeding adapter line 42, the feeding lifting frame 43, the upper furnace body 2, the outer track discharging line 45, and the discharging lifting frame 46 to load and unload and burn the blanks.

[0042] Referring to Figures 3-6, in one embodiment, the transverse conveying roller assembly includes a plurality of roller shafts 52, a plurality of transverse conveying roller grooves 54, and a transverse conveying drive unit. The plurality of transverse conveying roller grooves 54 are evenly spaced and arranged on the top surface of the frame 51. Each transverse conveying roller groove 54 has a plurality of roller shafts 52 rotatably mounted therein. The plurality of roller shafts 52 rotate synchronously under the drive of the transverse conveying drive unit. The transverse conveying drive unit includes a main shaft 57, a transverse conveying motor 511, and a plurality of first driven wheels 510. The main shaft 57 is rotatably mounted on one side of the frame 51 and is perpendicular to the transverse conveying roller grooves 54. The transverse conveying motor 511 is fixedly mounted on one side of the frame 51 and is transmission-connected to one end of the main shaft 57. A plurality of first driving wheels 58 corresponding one to each of the transverse conveying roller grooves 54 are fixedly mounted on the main shaft 57. The plurality of first driven wheels 510 are respectively fixedly mounted on one end of the plurality of roller shafts 52. The first driving wheel 58 is connected to the first driven wheels 510 in the corresponding transverse conveying roller groove 54 via a first transmission belt 59;

[0043] When the transverse conveying roller group is in operation, the transverse conveying motor 511 drives the main shaft 57 to rotate, thereby driving the multiple first driving wheels 58 on the main shaft 57 to rotate synchronously. When the first driving wheels 58 rotate, they drive the multiple first driven wheels 510 and roller shafts 52 in the corresponding transverse conveying roller grooves 54 to rotate through the first transmission belt 59, thereby driving all the roller shafts 52 on the frame 51 to rotate synchronously, thereby transporting the saggers thereon horizontally.

[0044] Referring to Figures 7-10 , in one embodiment, the longitudinal conveying roller assembly includes a plurality of rollers 53 and a plurality of longitudinal conveying roller grooves 55. The plurality of longitudinal conveying roller grooves 55 are evenly spaced and arranged on the top surface of the frame 51, and the plurality of longitudinal conveying roller grooves 55 are staggered with the plurality of transverse conveying roller grooves 54. End plates 512 are slidably mounted at both ends of each longitudinal conveying roller groove 55, and the rollers 53 are rotatably mounted between the two end plates 512. The lifting assembly includes a support plate 56, which is fixedly mounted on the upper end of the frame 51. A lifting column 516 is fixedly mounted on the top surface of the support plate 56, and a lifting plate 515 is fixedly mounted on the top end of the lifting column 516. The bottom end of the end plate 512 is fixedly mounted on the top surface of the lifting plate 515. A transmission groove 513 is opened on one side of the frame 51 and is arranged perpendicular to the longitudinal conveying roller grooves 55. The transmission trough 513 is connected to the longitudinal conveying roller trough 55 via a lifting chute 514. One end of the roller 53 extends through the lifting chute 514 into the transmission trough 513, and a synchronous pulley 521 is fixedly mounted on the end of the roller 53. The multiple synchronous pulleys 521 are connected to each other via a synchronous belt 522. A longitudinal conveying motor 517 is fixedly mounted on the top surface of the lifting plate 515. A second driving pulley 518 is mounted on the output shaft of the longitudinal conveying motor 517, and a second driven pulley 520 is fixedly mounted on the end of one of the rollers 53. The second driving pulley 518 and the second driven pulley 520 are connected to each other via a second transmission belt 519.

[0045] The initial height of the roller 53 is lower than the installation height of the roller shaft 52, so that the roller 53 does not affect the conveying operation of the roller shaft 52. When the longitudinal conveying roller assembly is in operation, the lifting plate 515 is first driven upward by the lifting column 516, thereby driving the roller 53 upward, thereby adjusting the height of the roller 53 so that the top of the roller 53 is slightly higher than the top of the roller shaft 52. The longitudinal conveying motor 517 then drives the second driving wheel 518 to rotate. At this time, the second driving wheel 518 drives the second driven wheel 520 to rotate via the second transmission belt 519, thereby driving the roller 53 connected to the second driven wheel 520 to rotate. At the same time, the roller 53 is driven by the synchronous wheel 521 and the synchronous belt 522 to rotate synchronously, thereby conveying the sagger thereon longitudinally.

[0046] Please refer to Figures 7 and 8. In one embodiment, a clamping, limiting and locking mechanism 6 for clamping the roller 53 is also installed on the frame 51. The locking mechanism 6 includes a positioning plate 63 and a lifting slider 68. The lifting slider 68 is slidably installed in the lifting chute 514, and the lifting slider 68 is rotatably connected to the end of the roller 53. The positioning plate 63 is fixedly installed on the upper end of the lifting chute 514, and a lifting shaft 61 is slidably installed on the positioning plate 63. A bottom plate 64 is fixedly installed at the bottom of the lifting shaft 61, and a lifting seat 62 is fixedly installed at the top of the lifting shaft 61. Connecting rods 65 are rotatably installed at both ends of the lifting seat 62, and one end of the connecting rod 65 is tilted upward and rotatably connected to a lever 66. The lever 66 is rotatably installed on the frame 51, and a clamping block 67 located on one side of the lifting chute 514 is rotatably installed at the bottom end of the lever 66;

[0047] As the roller 53 ascends, it drives the lifting slider 68 upward along the lifting chute 514. When the roller 53 reaches the operating height, the lifting slider 68 abuts the base plate 64 upward, thereby driving the lifting shaft 61 and the lifting seat 62 upward. As the lifting seat 62 moves upward, the connecting rod 65 pushes the upper end of the lever 66 outward, causing the lower end of the lever 66 to rotate inward. This drives the clamping blocks 67 on either side of the lifting chute 514 inward and closes, clamping the lifting slider 68 securely, thereby improving the stability of the installation of the lifting slider 68 and the roller 53.

[0048] Referring to FIG8 , in one embodiment, a spring is mounted on the lower end of the lifting shaft 61, abutting between the positioning plate 63 and the base plate 64. When the lifting slider 68 pushes the base plate 64 upward, the base plate 64 compresses and contracts the spring, generating a return force. When the roller 53 drives the lifting slider 68 downward to return, the base plate 64 is no longer limited by the lifting slider 68. The base plate 64 then descends and returns under the return force of the spring, thereby driving the lifting shaft 61 and the lifting seat 62 downward to return. As the lifting seat 62 moves downward, the upper end of the lever 66 is pulled inward by the connecting rod 65, causing the lower end of the lever 66 to rotate outward, driving the clamping blocks 67 on both sides of the lifting slot 514 to move outward and open, loosening their grip on the lifting slider 68 and facilitating the downward return of the lifting slider 68.

[0049] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0050] The preferred embodiments of the invention disclosed above are intended only to help illustrate the invention. These preferred embodiments do not exhaust all details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A double-layer kiln with a double-track outer circulation line, comprising a lower furnace body (1) and an upper furnace body (2) arranged in double layers from bottom to top, characterized in that: An inner track (3) is installed between the inlet and outlet ports of the lower furnace body (1), an outer track (4) is installed between the inlet and outlet ports of the upper furnace body (2), and a circulating conveying line is formed between the lower furnace body (1) and the inner track (3) as well as between the upper furnace body (2) and the outer track (4), for circulating conveying the sagger carrying the fired blank; The inner track line (3) comprises an inner track main conveying line (31) and an inner track feeding and discharging line, and the outer track line (4) comprises an outer track main conveying line (41) and an outer track feeding and discharging line. Both ends of the inner track main conveying line (31) and the outer track main conveying line (41) are connected via a reversing mechanism (5) so that the two groups of circulating conveying lines are connected to each other, and the saggers can be exchanged and transported between the two groups of circulating conveying lines. The reversing mechanism (5) comprises a frame (51), a transverse conveying roller group, a longitudinal conveying roller group and a lifting assembly, wherein the transverse conveying roller group and the longitudinal conveying roller group are staggeredly distributed on the top surface of the frame (51), and the longitudinal conveying roller group is installed on the frame (51) via the lifting assembly; The inner track feed and discharge line comprises an inner track feed line (32) arranged at the feed end of the lower furnace body (1) and an inner track discharge line (33) located at the discharge end of the lower furnace body (1), the two sides of the feed end of the inner track feed line (32) are respectively connected to the inner track main conveying line (31) and the reversing mechanism (5), and the discharge end of the inner track discharge line (33) is connected to another set of reversing mechanisms (5); The outer track feeding and discharging line comprises an outer track feeding line (44) arranged at the feeding port of the upper furnace body (2) and an outer track discharging line (45) arranged at the discharging port of the upper furnace body (2), a discharging lifting frame (46) being installed at the end of the outer track discharging line (45), and one end of the discharging lifting frame (46) being connected to the outer track main conveying line (41); The end of the outer track main conveying line (41) is connected to the reversing mechanism (5), and a feed switching line (42) is connected and installed on one side of the reversing mechanism (5). A feed lifting frame (43) is installed between the feed switching line (42) and the outer track feed line (44).

2. A double-layer kiln with a double-track outer circulation line according to claim 1, characterized in that: The transverse conveying roller group comprises a plurality of roller shafts (52), a plurality of transverse conveying roller grooves (54) and a transverse conveying driving unit. The plurality of transverse conveying roller grooves (54) are evenly spaced and arranged on the top surface of the frame (51). A plurality of roller shafts (52) are rotatably mounted in each of the transverse conveying roller grooves (54). The plurality of roller shafts (52) rotate synchronously under the drive of the transverse conveying driving unit.

3. A double-layer kiln with a double-track outer circulation line according to claim 2, characterized in that: The transverse conveying driving unit comprises a main shaft (57), a transverse conveying motor (511) and a plurality of first driven wheels (510); the main shaft (57) is rotatably mounted on one side of the frame (51) and is vertically distributed with the transverse conveying roller groove (54); the transverse conveying motor (511) is fixedly mounted on one side of the frame (51) and is drivingly connected with one end of the main shaft (57); A plurality of first driving wheels (58) corresponding one to one with the transverse conveying roller grooves (54) are fixedly mounted on the main shaft (57); a plurality of first driven wheels (510) are respectively fixedly mounted on one end of a plurality of roller shafts (52); and the first driving wheel (58) is connected to the plurality of first driven wheels (510) in the corresponding transverse conveying roller grooves (54) by a first transmission belt (59).

4. The double-layer kiln with a double-track outer circulation line according to claim 2 is characterized in that: The longitudinal conveying roller group comprises a plurality of rollers (53) and a plurality of longitudinal conveying roller grooves (55), wherein the plurality of longitudinal conveying roller grooves (55) are evenly spaced and arranged on the top surface of the frame (51), and the plurality of longitudinal conveying roller grooves (55) and the plurality of transverse conveying roller grooves (54) are staggeredly arranged; End plates (512) are slidably mounted at both ends of each longitudinal conveying roller groove (55), and the roller (53) is rotatably mounted between the two end plates (512).

5. The double-layer kiln with double-track outer circulation line according to claim 4 is characterized in that: The lifting assembly comprises a support plate (56), the support plate (56) is fixedly mounted on the upper end of the frame (51), a lifting column (516) is fixedly mounted on the top surface of the support plate (56), a lifting plate (515) is fixedly mounted on the top end of the lifting column (516), and the bottom end of the end plate (512) is fixedly mounted on the top surface of the lifting plate (515).

6. A double-layer kiln with a double-track outer circulation line according to claim 5, characterized in that: A transmission groove (513) is provided on one side of the frame (51) and is vertically distributed with the longitudinal conveying roller groove (55); the transmission groove (513) and the longitudinal conveying roller groove (55) are connected via a lifting slide groove (514); one end of the roller (53) passes through the lifting slide groove (514) and extends into the transmission groove (513); a synchronous wheel (521) is fixedly mounted on the end of the roller (53); and the plurality of synchronous wheels (521) are connected to each other via a synchronous belt (522); A longitudinal conveying motor (517) is fixedly mounted on the top surface of the lifting plate (515); a second driving wheel (518) is mounted on the output shaft of the longitudinal conveying motor (517); a second driven wheel (520) is fixedly mounted on the end of one of the rollers (53); the second driving wheel (518) and the second driven wheel (520) are connected in transmission via a second transmission belt (519).

7. The double-layer kiln with double-track outer circulation line according to claim 5 is characterized in that: The frame (51) is also provided with a locking mechanism (6) for clamping and limiting the roller (53), wherein the locking mechanism (6) comprises a positioning plate (63) and a lifting slider (68), wherein the lifting slider (68) is slidably installed in the lifting slide groove (514), and the lifting slider (68) is rotatably connected to the end of the roller (53); The positioning plate (63) is fixedly installed on the upper end of the lifting slide groove (514), and a lifting shaft (61) is slidably installed on the positioning plate (63). The bottom of the lifting shaft (61) is fixedly installed with a bottom plate (64), and the top of the lifting shaft (61) is fixedly installed with a lifting seat (62). Both ends of the lifting seat (62) are rotatably installed with connecting rods (65), one end of the connecting rod (65) is tilted upward and rotatably connected to a lever (66), and the lever (66) is rotatably installed on the frame (51), and the bottom end of the lever (66) is rotatably installed with a clamping block (67) located on one side of the lifting slide groove (514).

8. The double-layer kiln with double-track outer circulation line according to claim 7 is characterized in that: The lower end of the lifting shaft (61) is sleeved with a spring that abuts between the positioning plate (63) and the bottom plate (64).

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