A tunnel kiln device

Abstract

The present invention belongs to the field of tunnel kiln roasting, and more particularly relates to a tunnel kiln apparatus comprising a kiln body, tracks, a steering and lifting mechanism, and a kiln car mechanism. The kiln car mechanisms, connected end to end, circulate on two parallel rows of tracks within a linear kiln body. Two steering and lifting mechanisms are installed within the kiln body to lift and transfer the kiln car mechanisms from one row of tracks to the other. While incorporating the advantages of traditional linear tunnel kilns, the present invention utilizes two steering and lifting mechanisms at either end of a single kiln to reverse the direction of travel of the two rows of roasting cars running linearly on the double rows of tracks, thereby reducing the length of the linear tunnel kiln and enabling the reciprocating use of the roasting cars running on the tracks within the kiln body.

Description

Technical Field

[0001] The invention belongs to the field of tunnel kiln roasting, and in particular relates to tunnel kiln equipment. Background Art

[0002] A tunnel kiln is typically a long, straight tunnel with fixed walls and a vaulted ceiling on either side, and a kiln car running on tracks at the base. Combustion equipment is located on either side of the tunnel kiln's center, forming a fixed high-temperature zone—the firing zone. High-temperature flue gas generated by combustion flows along the tunnel toward the kiln head, driven by a chimney or induced draft fan at the front of the tunnel kiln, gradually preheating the products entering the kiln. This section constitutes the tunnel kiln's preheating zone. Cold air is blown in at the rear of the tunnel kiln to cool the products entering the kiln. This blown-in cold air, after passing through the products and heating them, is then withdrawn and fed into a dryer as a heat source for drying the greenware. This section constitutes the tunnel kiln's cooling zone.

[0003] The linear motion kiln car in a linear tunnel kiln has a simple driving structure and low operating resistance. However, because the kiln car moves in a straight line, it is not easy to recycle the car.

[0004] To save energy, traditional tunnel kilns use an air circulation system to recycle the heat carried by the carts and materials leaving the kiln to preheat the incoming carts and materials. However, this design requires a large layout area and is costly to build.

[0005] The present invention designs a tunnel kiln equipment to solve the above problems. Summary of the Invention

[0006] In order to solve the above-mentioned defects in the prior art, the present invention discloses a tunnel kiln equipment, which is implemented by adopting the following technical solutions.

[0007] A tunnel kiln device comprises a kiln body, tracks, a steering and lifting mechanism, and a kiln car mechanism, wherein a plurality of kiln car mechanisms connected end to end cyclically move on two parallel rows of tracks within a linear kiln body, and two steering and lifting mechanisms are installed within the kiln body for lifting and transferring the kiln car mechanisms from one row of tracks to the other row of tracks; a kiln opening at one end of the kiln body is located between the two rows of tracks and has a discharge chute for facilitating the kiln car mechanism from unloading in the middle of being lifted and turned by the steering and lifting mechanism; and a structure is provided at the end of the row of tracks where the kiln car mechanism moves toward the discharge chute so that the kiln car mechanism stops at the end of the track.

[0008] The kiln car mechanism includes a baking car, a baffle, a swing shaft, a winding wheel, a wire rope, a vortex spring, a rotating shaft, and wheels, wherein the baking car that passes through the top and bottom is equipped with wheels that cooperate with the track, and two baffles driven by the driving device on the mechanical arm and opening and closing the bottom of the baking car are hinged inside the baking car through a horizontal swing shaft perpendicular to its movement direction, and the swing shaft has a structure that self-locks it at any time and is unlocked at any time when the driving device on the mechanical arm is driven; the baking car has a structure that locks the two baffles that close the bottom of the baking car; a winding wheel is installed in the receiving groove at the front end of the baking car, and the winding wheel is wound with a wire rope connected to the baking car in front; the baking car has a vortex spring for resetting the rotating shaft where the winding wheel is located; the baking car has a structure that locks the rotating shaft when it has not reached the end of the track and unlocks the rotating shaft when it reaches the end of the track. This structure always keeps the rotating shaft unlocked during the process of the baking car being lifted, turned, and unloaded by the steering and lifting mechanism.

[0009] As a further improvement of the present technology, a turbine is mounted on the swing shaft and meshes with a worm mounted outside the roasting cart; a gear H mounted outside the roasting cart meshes with a gear G mounted on the worm; a gear I coaxial with the gear H cooperates with an incomplete gear mounted outside the roasting cart, and the incomplete gear has a hexagonal head that is coaxial with the central axis and cooperates with the drive device on the robotic arm.

[0010] As a further improvement of the present technology, the two slide grooves C on the inner wall of the roasting cart are equipped with limit rods A that slide horizontally in a direction parallel to the swing axis and correspond to the two baffles one by one. The two limit rods A are installed on a slider that moves in the side wall of the roasting cart, and the slider is fixedly connected to the screw that moves horizontally in the slide groove D on the outer side of the roasting cart; the ring sleeve B on the outer side of the roasting cart is rotated with an internal threaded sleeve B that is screwed with the screw; the gear J installed on the internal threaded sleeve B cooperates with the incomplete gear.

[0011] As a further improvement of the present technology, the steering and lifting mechanism includes a swivel seat, a ring sleeve A, a motor A, a column, an internal threaded sleeve A, a motor B, a lifting seat A, a lifting seat B, and a hydraulic cylinder, wherein the swivel seat fixed to the ground inside the kiln body is rotated with the ring sleeve A driven by the motor A, and the ring sleeve A is nested and rotated with the internal threaded sleeve A that is threaded with the column that slides vertically in the ring sleeve A and is driven by the motor B; the lifting seat A is installed on the column, and the lifting seat B driven by the hydraulic cylinder and lifting the roasting car from the bottom of the roasting car slides horizontally along the radial direction of the column on the lifting seat A.

[0012] As a further improvement of this technology, gear A is installed on the ring sleeve A, gear A is engaged with gear B installed in the kiln body, gear B is engaged with gear C installed on the output shaft of motor A; gear D is installed on the internal threaded sleeve A, gear D is engaged with gear E installed in the kiln, gear E is engaged with gear F on the output shaft of motor B.

[0013] As a further improvement of the present technology, a trigger rod slides horizontally in the front end slide A of the roasting cart and cooperates with the top rod at the end of the track and the top rod at the unloading chute; the teeth on the trigger rod mesh with the gear L in the side wall of the roasting cart; the side wall of the roasting cart moves vertically with a limit rod B that cooperates with the limit groove on the limit wheel installed on the rotating shaft and is installed with a spring A for resetting the limit rod B; the teeth on the limit rod B mesh with the gear K on the shaft where the gear L is located; the slide B at the lower end of the roasting cart slides vertically with a limit rod C that cooperates with the upper limit groove of the trigger rod and with the lifting seat B in the steering lifting mechanism and is installed with a spring B for resetting the limit rod C.

[0014] As a further improvement of this technology, the ends of the two rows of tracks are provided with stop bars that cooperate with the front wheels on the roasting car; the unloading chute is provided with a platform that makes the roasting car in the unloading state and the roasting car on the track at the same height; the front and rear ends of the roasting car are both equipped with fixed pulleys that cooperate with the stretched steel wire rope during the steering process of the roasting car being turned by the steering lifting mechanism.

[0015] Compared to traditional tunnel kiln roasting equipment, the present invention combines the advantages of traditional linear tunnel kilns while utilizing two steering and lifting mechanisms at each end of a single kiln to reverse the direction of travel of two rows of roasting carts running linearly on double-row tracks. This reduces the length of the linear tunnel kiln and enables the repetitive use of the roasting carts on the tracks within the kiln body. Since the roasting carts lose a small amount of heat during unloading, the remaining heat is retained, effectively preheating the new material after reloading, thus achieving energy savings. The present invention is simple in structure and offers excellent performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the present invention and its overall cross-sectional schematic diagram.

[0017] Figure 2 It is a cross-sectional diagram of the coordination between the steering and lifting mechanism and the kiln car mechanism on two rows of tracks.

[0018] Figure 3 It is a cross-sectional diagram of the cooperation among the lifting seat B, the limiting rod C, the trigger rod and the ejector rod.

[0019] Figure 4 It is a cross-sectional diagram of the coordination between the steering and lifting mechanism and the kiln car mechanism.

[0020] Figure 5 It is a cross-sectional diagram of the coordination of the mechanisms of any two adjacent kiln cars on the same track.

[0021] Figure 6 It is a schematic diagram of the steering lifting mechanism and its cross-section.

[0022] Figure 7 It is a schematic diagram of the steering lifting mechanism and its cross-section.

[0023] Figure 8 It is a schematic diagram of three partial sections of the trigger rod and the winding wheel transmission.

[0024] Figure 9 It is a cross-sectional diagram of the limit rod A, the incomplete gear and the worm gear transmission.

[0025] Figure 10 It is a schematic diagram of the roasting car from two perspectives.

[0026] Names of the symbols in the figure: 1. Kiln body; 2. Discharge chute; 3. Platform; 4. Track; 5. Stop rod; 6. Ejector rod; 7. Steering and lifting mechanism; 8. Rotating seat; 9. Ring sleeve A; 10. Guide groove; 11. Gear A; 12. Gear B; 13. Gear C; 14. Motor A; 15. Column; 16. Guide block; 17. Internal thread sleeve A; 18. Gear D; 19. Gear E; 20. Gear F; 21. Motor B; 22. Lifting seat A; 23. Trapezoidal guide groove; 24. Lifting seat B; 25. Trapezoidal guide block; 26. Hydraulic cylinder; 27. Kiln car mechanism; 28. Roasting car; 29. Receiving tank; 30. Chute A; 31. Chute 3. Gear B; 32. Slide C; 33. Slide D; 34. Baffle; 35. Swing shaft; 36. Turbine; 37. Worm; 38. Gear G; 39. Gear H; 40. Gear I; 41. Incomplete gear; 42. Hexagonal head; 43. Gear J; 44. Internal threaded sleeve B; 45. Ring sleeve B; 46. Screw; 47. Slider; 48. Limit rod A; 49. Winding wheel; 50. Wire rope; 51. Vortex spring; 52. Rotating shaft; 53. Limit wheel; 54. Limit rod B; 55. Spring A; 56. Gear K; 57. Gear L; 58. Trigger rod; 59. Limit rod C; 60. Spring B; 61. Wheel; 62. Fixed pulley. DETAILED DESCRIPTION

[0027] The accompanying drawings are schematic diagrams of the present invention to facilitate understanding of the structural operation principle. The specific product structure and proportional dimensions can be determined according to the use environment and conventional technology.

[0028] like Figure 1 As shown, it includes a kiln body 1, a track 4, a turning and lifting mechanism 7, and a kiln car mechanism 27. Figure 1 As shown, a plurality of kiln car mechanisms 27 connected end to end cyclically move on two parallel rows of rails 4 in a linear kiln body 1. Two turning and lifting mechanisms 7 are installed in the kiln body 1 to lift and transfer the kiln car mechanisms 27 from one row of rails 4 to another row of rails 4; Figure 1 、 2 As shown, the kiln mouth at one end of the kiln body 1 is located between two rows of tracks 4 and has a discharge chute 2 for facilitating the kiln car mechanism 27 to discharge the material in the middle of being lifted and turned by the turning and lifting mechanism 7; Figure 2 、3 As shown, the end of a row of tracks 4 where the kiln car mechanism 27 moving toward the discharge chute 2 is located has a structure that allows the kiln car mechanism 27 to stop at the end of the track 4 .

[0029] like Figure 7 As shown, the kiln car mechanism 27 includes a roasting car 28, a baffle 34, a swing shaft 35, a winding wheel 49, a wire rope 50, a vortex spring 51, a rotating shaft 52, and a wheel 61. Figure 7 、 10 As shown, the roasting car 28 is installed with wheels 61 that match the track 4. The roasting car 28 is hinged with two baffles 34 driven by the driving device on the robot arm and used to open and close the bottom of the roasting car 28 through a horizontal swing shaft 35 perpendicular to its movement direction. Figure 7 、 9 As shown, the swing shaft 35 has a structure that is self-locking at any time and unlocked at any time when the driving device on the robot arm is driven; the roasting car 28 has a structure that locks the two baffles 34 at the bottom of the roasting car 28; Figure 5 、 7 As shown in FIG. 10 , a winding wheel 49 is installed in the receiving groove 29 at the front end of the roasting car 28, and a steel wire rope 50 connected to the front roasting car 28 is wound around the winding wheel 49; Figure 8 As shown, the roasting car 28 has a vortex spring 51 for resetting the rotating shaft 52 where the winding wheel 49 is located; Figure 3 、 8 As shown, the roasting car 28 has a structure for locking the rotating shaft 52 when it has not reached the end of the track 4 and unlocking the rotating shaft 52 when it reaches the end of the track 4. This structure always keeps the rotating shaft 52 unlocked during the roasting car 28 being lifted, turned and unloaded by the turning and lifting mechanism 7.

[0030] like Figure 7 、 9 As shown, the swing shaft 35 is equipped with a turbine 36 that meshes with a worm 37 installed on the outside of the roasting cart 28; a gear H39 installed on the outside of the roasting cart 28 meshes with a gear G38 installed on the worm 37; a gear I40 coaxial with the gear H39 cooperates with an incomplete gear 41 installed on the outside of the roasting cart 28, and the incomplete gear 41 has a hexagonal head 42 that is coaxial with the central axis and cooperates with the drive device on the robotic arm.

[0031] like Figure 9 、 10As shown, the two chutes C32 on the inner wall of the roasting cart 28 are equipped with limit rods A48 that slide horizontally in a direction parallel to the swing shaft 35 and correspond to the two baffles 34 one by one. The two limit rods A48 are installed on a slider 47 that moves in the side wall of the roasting cart 28. The slider 47 is fixedly connected to the screw 46 that moves horizontally in the chute D33 on the outer side of the roasting cart 28; the ring sleeve B45 on the outer side of the roasting cart 28 is rotated with an internal threaded sleeve B44 that is screwed with the screw 46; the gear J43 installed on the internal threaded sleeve B44 cooperates with the incomplete gear 41.

[0032] like Figure 6 As shown, the steering lifting mechanism 7 includes a rotating seat 8, a ring sleeve A9, a motor A14, a column 15, an internal thread sleeve A17, a motor B21, a lifting seat A22, a lifting seat B24, and a hydraulic cylinder 26, wherein Figure 4 、 6 As shown, a ring sleeve A9 driven by a motor A14 rotates in a rotating seat 8 fixed to the ground inside the kiln body 1, and an internal threaded sleeve A17 is nested and rotated on the ring sleeve A9, which is threadedly matched with a column 15 that slides vertically in the ring sleeve A9 and is driven by a motor B21; a lifting seat A22 is installed on the column 15, and a lifting seat B24 driven by a hydraulic cylinder 26 and lifting the roasting car 28 from the bottom of the roasting car 28 slides horizontally along the radial direction of the column 15 on the lifting seat A22.

[0033] like Figure 6 As shown, a gear A11 is installed on the ring sleeve A9, and the gear A11 is engaged with the gear B12 installed in the kiln body 1, and the gear B12 is engaged with the gear C13 installed on the output shaft of the motor A14; a gear D18 is installed on the internal threaded sleeve A17, and the gear D18 is engaged with the gear E19 installed in the kiln, and the gear E19 is engaged with the gear F20 on the output shaft of the motor B21.

[0034] like Figure 3 、 8 As shown in Figures 10, a trigger rod 58 that cooperates with the top rod 6 at the end of the track 4 and the top rod 6 at the unloading chute 2 slides horizontally in the front end slide groove A30 of the roasting cart 28; the teeth on the trigger rod 58 mesh with the gear L57 in the side wall of the roasting cart 28; a limit rod B54 that cooperates with the limit groove on the limit wheel 53 installed on the rotating shaft 52 moves vertically in the side wall of the roasting cart 28, and a spring A55 for resetting the limit rod B54 is installed; the teeth on the limit rod B54 mesh with the gear K56 on the shaft where the gear L57 is located; a limit rod C59 that cooperates with the upper limit groove of the trigger rod 58 and with the lifting seat B24 in the steering lifting mechanism 7 slides vertically in the slide groove B31 at the lower end of the roasting cart 28, and a spring B60 for resetting the limit rod C59 is installed.

[0035] like Figure 3As shown, the ends of the two rows of tracks 4 are provided with stop rods 5 that cooperate with the front wheels 61 on the roasting vehicle 28; Figure 1 、 2 As shown, the unloading chute 2 has a platform 3 that makes the roasting car 28 in the unloading state and the roasting car 28 on the track 4 have the same height; Figure 5 、 7 As shown, the front and rear ends of the roasting car 28 are both equipped with fixed pulleys 62 that cooperate with the stretched steel wire rope 50 when the roasting car 28 is turned by the turning and lifting mechanism 7.

[0036] like Figure 4 As shown, two guide blocks 16 are symmetrically mounted on the column 15, and the two guide blocks 16 slide in the two guide grooves 10 on the inner wall of the ring sleeve A9. A trapezoidal guide block 25 is mounted on the lifting seat, and the trapezoidal guide block 25 slides in the trapezoidal guide groove 23 on the lifting seat A22.

[0037] The motor A14 and the motor B21 in the present invention both adopt existing technologies.

[0038] The present invention's workflow: In the initial state, an equal number of kiln car mechanisms 27 are positioned on both rows of tracks 4 within the kiln body 1, and all kiln car mechanisms 27 are connected end-to-end. The lifting seats B24 of the two steering and lifting mechanisms 7 are located directly below the kiln car mechanisms 27 at the respective ends of the tracks 4 and do not interact with the limiting rods C59. The trigger rods 58 in the kiln car mechanisms 27 at the respective ends of the tracks 4 within the kiln body 1 interact with the push rods 6 at the respective ends of the tracks 4. The limiting rods C59 align with the limiting slots in the corresponding trigger rods 58. The limiting rods B54 are not inserted into the limiting slots in the limiting wheels 53. Both springs A55 and B60 are compressed. The trigger rods 58 in the remaining kiln car mechanisms 27 do not interact with the push rods 6. The limiting rods C59 are offset from the limiting slots in the corresponding trigger rods 58. The limiting rods B54 are inserted into the limiting slots in the corresponding limiting wheels 53. Both springs A55 and B60 are compressed. The lower end of the limiting rod C59 in each kiln car mechanism 27 protrudes from the lower end of the roasting car 28. The two baffles 34 in each kiln car mechanism 27 are closed against the bottom of the roasting car 28, and the two limiting rods A48 lock the corresponding baffles 34 in the closed position. The teeth of the partial gear 41 do not mesh with either the gear J43 or the gear I40.

[0039] When it is necessary to use the present invention to carry lepidolite for roasting, first start the two steering and lifting mechanisms 7 synchronously. The three steering and lifting mechanisms 7 synchronously and sequentially complete the lifting of the kiln car mechanism 27 at the end of each row of tracks 4 and the transfer of one kiln car mechanism 27 to the top of the discharge chute 2. Then, the steering and lifting mechanism 7 where the kiln car mechanism 27 located above the discharge chute 2 is located places the kiln car mechanism 27 on the platform 3 at the discharge chute 2 for loading. At the same time, all the kiln car mechanisms 27 are driven by the two steering and lifting mechanisms 7 to synchronously complete the movement of one kiln car mechanism 27 parking space. After the roasting car 28 of the kiln car mechanism 27 is filled with lepidolite material, start the steering and lifting mechanism 7 where the kiln car mechanism 27 filled with material is located again to lift the kiln car mechanism 27 and continue to transfer the kiln car mechanism 27 filled with lepidolite material to another row of tracks 4. After the two steering and lifting mechanisms 7 pull all the kiln car mechanisms 27 forward one parking space and complete the transfer of the kiln car mechanisms 27 at the end of each row of tracks 4 to the other row of tracks 4, they must quickly complete the reset to the initial state.

[0040] The lifting and transfer process of the kiln car mechanism 27 at the end of the track 4 by the two steering lifting mechanisms 7 is as follows:

[0041] The motors B21 in the two steering and lifting mechanisms 7 are activated synchronously. Motor B21 drives the upright post 15 vertically upward within the corresponding ring sleeve A9 via the corresponding gears F20, E19, D18, and internally threaded sleeve A17. The upright post 15 then drives the lifting seat B24, via the lifting seat A22, to move vertically upward synchronously. The lifting seat B24 first interacts with the limit rod C59, which, under the action of the lifting seat B24, inserts upward into the limit groove of the trigger rod 58, locking the trigger rod 58 in place. The spring B60 is further compressed, causing the limit rod B54 to remain disengaged from the limit groove of the limit wheel 53.

[0042] When lifting base B24 contacts the bottom of the roasting car 28, it continues to rise, and begins to synchronously lift the entire kiln car mechanism 27. When the kiln car mechanism 27 is lifted high enough to pass over the top rod 6 around the column 15, motor B21 is stopped and motor A14 is started. Motor A14 drives the kiln car mechanism 27 to swing around the column 15 toward the adjacent row of rails 4 through gear C13, gear B12, gear A11, ring A9, internally threaded sleeve A17, column 15, lifting base A22, and lifting base B24.

[0043] As the steering and lifting mechanism 7 drives the lifted kiln car mechanism 27 toward the adjacent row of tracks 4, the lifted and diverted kiln car mechanism 27 pulls all the kiln car mechanisms 27 behind it and located on the same track 4 forward synchronously via its tail wire rope 50. Simultaneously, the winding wheel 49 at the front end of the lifted kiln car mechanism 27 rotates under the return action of the corresponding vortex spring 51, rewinding the wire rope 50.

[0044] When the two lifted kiln car mechanisms 27 simultaneously swing 90 degrees around the uprights 15, one lifted kiln car mechanism 27 is positioned directly above the discharge chute 2. The kiln car mechanism 27 in front of it advances exactly one parking space on the corresponding track 4, and the kiln car mechanism 27 behind it advances exactly one parking space. The front wheels 61 of the kiln car mechanism 27 immediately following the lifted kiln car mechanism 27 abut against the stop rod 5 on the corresponding track 4, stopping their movement. The trigger rod 58 of the kiln car mechanism 27 immediately following the lifted kiln car mechanism 27 interacts with the push rod 6 and, under the action of the push rod 6, retracts a certain distance into the chute A30. The limit groove on the trigger rod 58 aligns with the corresponding limit rod C59, and the limit rod B54 completely disengages the limit groove on the limit wheel 53.

[0045] Next, the motors A14 in the two diverting and lifting mechanisms 7 are deactivated, and the motor B21 in the diverting and lifting mechanism 7, located on the lifting mechanism directly above the discharge chute 2, is activated. Through a series of transmissions, motor B21 drives the kiln car mechanism 27 on the lifting seat B24 downward toward the platform 3 until the lifting seat B24 returns to its initial position relative to the lower end of the roasting car 28, at which point motor B21 is deactivated. Because the trigger rod 58 in the kiln car mechanism 27 that has fallen onto the platform 3 interacts with the new push rod 6, after the lifting seat B24 in the diverting and lifting mechanism 7 disengages the limit rod C59, the trigger rod 58 in the kiln car mechanism 27 that has fallen onto the platform 3 remains retracted within the chute A30.

[0046] When the lifting seat B24 in the steering lifting mechanism 7 is separated from the limit rod C59 in the kiln car mechanism 27 falling onto the platform 3, the hydraulic cylinder 26 in the steering lifting mechanism 7 is first started, and the hydraulic cylinder 26 drives the lifting seat B24 to contract radially along the column 15 on the lifting seat A22.

[0047] When the lifting base B24 is completely separated from the lower end of the roasting trolley 28 and the downward swing restriction on the two baffles 34 is released, the motor A14 stops running. Next, the driving device on the robot arm interacts with the hexagonal head 42 on the incomplete gear 41 to drive the incomplete gear 41 to rotate. The incomplete gear 41 first meshes with the gear J43 and then, through the gear J43, the internal threaded sleeve B44, the screw 46, and the slider 47, drives the two limit rods A48 to retract into the corresponding slide slots C32, thereby releasing the lock on the two closed baffles 34.

[0048] As the incomplete gear 41 continues to rotate, when its teeth cease meshing with gear J43, the two limit rods A48 completely unlock the two baffles 34. The incomplete gear 41 then begins meshing with gear I40, driving the two swing shafts 35 in opposite directions through gear I40, gear H39, gear G38, worm 37, and worm gear 36. These swing shafts 35 then drive their corresponding baffles 34 to swing downward around their respective swing shafts 35, opening toward the bottom of the roasting trolley 28. When the incomplete gear 41's teeth cease meshing with gear I40, the two baffles 34 enter a fully open state and remain open due to the self-locking action of worm gear 36 and worm gear 37. The teeth of the incomplete gear 41 no longer mesh with either gear I40 or gear J43. The calcined lepidolite material within the roasting trolley 28 then flows through the opened bottom into the discharge chute 2, completing the unloading of the roasting trolley 28.

[0049] When the lepidolite in the roasting cart 28 is unloaded, the drive device on the robotic arm drives the incomplete gear 41 to rotate in the opposite direction. The teeth of the incomplete gear 41 first mesh with gear I40 and, through gear I40, gear H39, gear G38, worm 37, and turbine 36, drive the two swing shafts 35 to rotate. The two swing shafts 35 respectively drive corresponding baffles 34 to close the bottom of the roasting cart 28. When the teeth of the incomplete gear 41 end meshing with gear I40, the two baffles 34 complete the closure of the bottom of the roasting cart 28. The teeth of the incomplete gear 41 begin meshing with gear J43 and, through a series of transmissions, drive the two limit rods A48 to reset and ultimately lock the two baffles 34 in the closed state. When the teeth of the incomplete gear 41 end meshing with gear J43, the rotation of the incomplete gear 41 stops. After the two baffles 34 are closed to the bottom of the roasting trolley 28, the roasting trolley 28 is continuously loaded. Since the roasting trolley 28 loses a small amount of heat due to unloading, the roasting trolley 28, which still retains most of the heat, can effectively preheat the new material after reloading, thereby achieving the purpose of energy saving.

[0050] Next, the hydraulic cylinder 26 in the steering and lifting mechanism 7 is activated, driving the lifting seat B24 on the lifting seat A22 to move radially along the column 15 toward the bottom of the kiln car mechanism 27 on the platform 3. When the lifting seat B24 reaches directly below the kiln car mechanism 27, the hydraulic cylinder 26 is stopped and the motor B21 is activated. Motor B21 drives the lifting seat B24 vertically upward through a series of transmissions. The lifting seat B24 first encounters and interacts with the limit rod C59, which then inserts into the limit groove of the trigger rod 58 and locks the position of the trigger rod 58. The spring B60 is further compressed, thereby keeping the limit rod B54 disengaged from the limit groove of the corresponding limit wheel 53.

[0051] When the kiln car mechanism 27 on the platform 3 moves upward enough to pass over the top rod 6 around the column 15 under the continued lifting of the steering lifting mechanism 7, the motors A14 in the two steering lifting mechanisms 7 are started at the same time. The motor A14 drives the kiln car mechanism 27 on the lifting seat B24 to continue to move around the column 15 to the top of the other track 4 through a series of transmissions.

[0052] As the lifted kiln car mechanism 27 continues to move around the upright column 15 toward the other row of rails 4 under the drive of the steering lifting mechanism 7, the winding wheel 49 at the front end of the lifted kiln car mechanism 27 continues to rewind the steel wire rope 50 thereon. The lifted kiln car mechanism 27 stretches the steel wire rope 50 at its rear end and drives the winding wheel 49 on the kiln car mechanism 27 following it to rotate, and the vortex spring 51 at the front end of the kiln car mechanism 27 following the lifted kiln car mechanism 27 is further compressed.

[0053] When the lifted kiln car mechanism 27 reaches just above the adjacent row of rails 4, the motor A14 is stopped and the motor B21 is started. The motor B21 drives the kiln car mechanism 27 on the lifting seat B24 back onto the rails 4 through a series of transmissions.

[0054] After the kiln car mechanism 27 returns to the track 4, the length of the wire rope 50 between it and the front kiln car mechanism 27 is shortened to its minimum, and the limit groove on the limit wheel 53, which is coaxial with the front winding wheel 49, aligns with the corresponding limit rod B54. At this point, motor B21 is activated, and through a series of transmissions, motor B21 drives the lifting seat B24 vertically downward, eventually separating from the bottom of the roasting car 28 and the limit rod C59. When the lifting seat B24 is free of the limit rod C59, the limit rod C59, under the reset action of spring B60, disengages the limit groove on the trigger rod 58. The limit rod B54, under the action of spring A55, inserts into the limit groove on the limit wheel 53, restricting the rotation of the winding wheel 49. Simultaneously, the limit rod B54, via gears K56 and L57, drives the trigger rod 58 a certain distance out of the chute A30, causing the limit groove on the trigger rod 58 to intersect with the limit rod C59.

[0055] Next, hydraulic cylinder 26 is activated, driving lift base B24 to retract radially along column 15. Hydraulic cylinder 26 stops when lift base B24 is completely clear of the lower end of kiln car mechanism 27. Then, motor A14 is activated, driving lift base B24 through a series of transmission mechanisms to swing around column 15. After lift base B24 has swung 180 degrees, motor A14 is stopped and hydraulic cylinder 26 is activated. Hydraulic cylinder 26 drives lift base B24 toward the end of track 4, directly below kiln car mechanism 27. Hydraulic cylinder 26 stops when lift base B24 is directly below kiln car mechanism 27 at the end of track 4.

[0056] At this point, the lifting and transfer process of the kiln car mechanism 27 by the steering lifting mechanism 7 is completed.

[0057] In summary, the present invention has the following beneficial effects: while combining the advantages of conventional linear tunnel kilns, it utilizes two steering and lifting mechanisms 7 at either end of a single kiln to reverse the direction of travel of two rows of roasting carts 28 running linearly on the double-row tracks 4, thereby reducing the length of the linear tunnel kiln and enabling the reciprocating use of the roasting carts 28 running on the tracks 4 within the kiln body 1. In the present invention, since the roasting carts 28 lose a small amount of heat during unloading, the roasting carts 28, which still retain a large amount of heat, effectively preheat the new material after reloading, thereby achieving energy conservation.

Claims

1. A tunnel kiln equipment, characterized by: The kiln comprises a kiln body, rails, a steering and lifting mechanism, and a kiln car mechanism. A plurality of kiln car mechanisms, connected end to end, circulate on two parallel rows of rails within the linear kiln body. Two steering and lifting mechanisms are installed within the kiln body to lift and transfer the kiln car mechanisms from one row of rails to the other. A kiln opening at one end of the kiln body, located between the two rows of rails, is provided with a discharge chute for facilitating the kiln car mechanism from unloading while being lifted and diverted by the steering and lifting mechanism. A structure is provided at the end of the row of rails where the kiln car mechanism moves toward the discharge chute, causing the kiln car mechanism to stop at the end of the rails. The kiln car mechanism includes a baking car, a baffle, a swing shaft, a winding wheel, a steel wire rope, a vortex spring, a rotating shaft, and a wheel. The baking car is connected to a vertically pendulum-shaped structure and is equipped with a wheel that matches the track. Two baffles driven by a driving device on a mechanical arm and opening and closing the bottom of the baking car are hingedly connected to the baking car through a horizontal swing shaft perpendicular to its movement direction. The swing shaft has a structure that can self-lock it at any time and unlock it at any time when the driving device on the mechanical arm is driven. The baking car has a structure that locks the two baffles at the bottom of the baking car. A winding wheel is installed in the receiving groove at the front end of the baking car, and a steel wire rope connected to the baking car in front is wound around the winding wheel. The baking carriage is provided with a vortex spring for resetting the rotating shaft where the winding wheel is located; The roasting car has a structure that locks the rotating shaft when it has not reached the end of the track and unlocks the rotating shaft when it reaches the end of the track. This structure always keeps the rotating shaft unlocked during the process of the roasting car being lifted, turned and unloaded by the steering and lifting mechanism; The swing shaft is equipped with a turbine that meshes with a worm mounted on the outside of the roasting car; a gear H mounted on the outside of the roasting car meshes with a gear G mounted on the worm; a gear I coaxial with the gear H cooperates with an incomplete gear mounted on the outside of the roasting car, and the incomplete gear has a hexagonal head that is coaxial with the central axis and cooperates with the drive device on the robotic arm; The two chutes C on the inner wall of the roasting car are provided with limit rods A that slide horizontally in a direction parallel to the swing axis and are matched with the two baffles one by one. The two limit rods A are installed on the sliders that move in the side wall of the roasting car. The sliders are fixedly connected to the screws that move horizontally in the chutes D on the outer side of the roasting car; the ring sleeve B on the outer side of the roasting car is rotated with the internal thread sleeve B that is screwed with the screw; the gear J installed on the internal thread sleeve B cooperates with the incomplete gear; The steering and lifting mechanism includes a swivel seat, a ring sleeve A, a motor A, a column, an internal threaded sleeve A, a motor B, a lifting seat A, a lifting seat B, and a hydraulic cylinder. The swivel seat fixed to the ground inside the kiln body is rotated with the ring sleeve A driven by the motor A, and the ring sleeve A is nested and rotated with the internal threaded sleeve A that is threaded with the column that slides vertically inside the ring sleeve A and is driven by the motor B; the lifting seat A is installed on the column, and the lifting seat B that slides horizontally along the radial direction of the column on the lifting seat A is driven by the hydraulic cylinder and lifts the roasting car from the bottom of the roasting car; The ring sleeve A is equipped with a gear A, which meshes with a gear B installed in the kiln body, and the gear B meshes with a gear C installed on the output shaft of the motor A; the internal threaded sleeve A is equipped with a gear D, which meshes with a gear E installed in the kiln, and the gear E meshes with a gear F on the output shaft of the motor B; A trigger rod slides horizontally in the front end slide A of the roasting car and cooperates with the top rod at the end of the track and the top rod at the unloading chute; the teeth on the trigger rod mesh with the gear L in the side wall of the roasting car; a limit rod B moves vertically in the side wall of the roasting car and cooperates with the limit groove on the limit wheel installed on the rotating shaft, and a spring A for resetting the limit rod B is installed; the teeth on the limit rod B mesh with the gear K on the shaft where the gear L is located; a limit rod C slides vertically in the lower end of the roasting car and cooperates with the upper limit groove of the trigger rod and the lifting seat B in the steering lifting mechanism, and a spring B for resetting the limit rod C is installed.

2. The tunnel kiln equipment according to claim 1, characterized in that: The ends of the two rows of tracks are each provided with a stop rod that cooperates with the front end wheels on the roasting car; the unloading chute is provided with a platform that makes the roasting car in the unloading state and the roasting car on the track have the same height; the front and rear ends of the roasting car are both installed with fixed pulleys that cooperate with the stretched steel wire rope during the steering process of the roasting car being turned by the steering lifting mechanism.

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