An energy-saving tunnel kiln roasting device

Abstract

The present invention belongs to the field of tunnel kiln roasting, and particularly relates to an energy-saving tunnel kiln roasting device, which includes a preheating kiln, a roasting kiln, a cooling kiln, a kiln car mechanism, and a steering mechanism. Among them, a number of kiln car mechanisms connected end to end in sequence move in a cyclic manner within an equilateral triangle-shaped kiln body formed by the preheating kiln, the roasting kiln, and the cooling kiln; at each corner of the kiln body, a steering mechanism is installed to lift and transfer the kiln car mechanism from one row of tracks to an adjacent row of tracks. The present invention has the advantages that the roasting cars in the driving ring tunnel kiln can be recycled, and the driving structure of the roasting cars in the traditional straight tunnel kiln is simple and the movement resistance is small. The present invention realizes the reversal of the movement direction of the roasting cars between any two adjacent kiln bodies through the steering mechanisms at the three corners of the equilateral triangle distribution, so as to achieve the advantages of both the straight tunnel kiln and the ring tunnel kiln while having the advantages of the straight tunnel kiln.

Description

Technical Field

[0001] The present invention belongs to the field of tunnel kiln roasting, and particularly relates to an energy-saving tunnel kiln roasting device. Background Art

[0002] Tunnel kilns are divided into straight tunnel kilns and annular tunnel kilns.

[0003] In an annular tunnel kiln, since the internal roasting car moves in a circular motion, its driving structure is complex, the resistance generated by the circular motion of the roasting car is large, and although the annular tunnel kiln is convenient for the recycling of the roasting car, the floor area of the annular tunnel kiln is large.

[0004] In a straight tunnel kiln, the driving structure required for the linear motion of the roasting car is simple and the motion resistance is small, but the roasting car in the straight tunnel kiln is not easy to recycle.

[0005] The present invention designs an energy-saving tunnel kiln roasting device to solve the above problems. Summary of the Invention

[0006] To solve the defects in the prior art, the present invention discloses an energy-saving tunnel kiln roasting device, which is realized by the following technical solutions.

[0007] An energy-saving tunnel kiln roasting device includes a preheating kiln, a roasting kiln, a cooling kiln, a kiln car mechanism, and a steering mechanism. A plurality of kiln car mechanisms connected end to end in sequence move cyclically in an equilateral triangular kiln body formed by the preheating kiln, the roasting kiln, and the cooling kiln; at each corner of the kiln body, a steering mechanism is installed to lift and transfer the kiln car mechanism from one row of tracks to an adjacent row of tracks; at the inlet of the cooling kiln, there is a discharge chute for facilitating the discharge of the kiln car mechanism after it is transferred from the roasting kiln to the cooling kiln by the steering mechanism and a loading chute for loading the kiln car mechanism; at each corner of the kiln body, there is a structure for stopping the kiln car mechanism at the end of the track.

[0008] The kiln car mechanism includes a roasting car, a baffle, a swing shaft, a winding wheel, a volute spring, a rotating shaft, a steel wire rope, and wheels. Among them, three wheels that cooperate with the track are installed on the triangular roasting car that penetrates up and down. The wheel at the rear end of the roasting car has a structure that does not interfere with the swing-back reset of the steering mechanism after the steering mechanism lifts and transfers the roasting car; inside the roasting car, a triangular baffle that is driven by a driving device on the robotic arm and opens and closes the bottom of the roasting car is hinged by a horizontal swing shaft perpendicular to its moving direction. The swing shaft has a structure that can self-lock at any time and unlock at any time when driven by the driving device on the robotic arm; the roasting car has a structure that locks the baffle closing the bottom of the roasting car; a winding wheel is installed in the receiving groove at the front end of the roasting car, and a steel wire rope connected to the roasting car in front is wound around the winding wheel; inside the roasting car, there is a volute 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 does not reach the end of the track and unlocks the rotating shaft when it reaches the end of the track. This structure remains in the unlocked state for the rotating shaft during the process of the roasting car being lifted and turned by the steering mechanism.

[0009] As a further improvement of the present technology, the steering mechanism includes a rotating base, a rotating column, a motor, an L-shaped seat, a lifting seat, a hydraulic cylinder, and a lifting frame. Among them, a ring sleeve A driven by a motor A is rotationally fitted inside a rotating base fixed at the corner of the kiln body. A rotating column driven by a motor is nested and rotated on the ring sleeve A; an L-shaped seat is installed on the rotating column, and a lifting seat driven by a hydraulic cylinder slides vertically on the L-shaped seat. The lifting seat has a lifting frame for lifting the roasting car from the bottom of the roasting car.

[0010] As a further improvement of the present technology, the rotating column is installed with a turbine B that meshes with a worm B on the output shaft of the motor.

[0011] As a further improvement of the present technology, a turbine A that meshes with a worm A installed outside the roasting car is installed on the swing shaft. One end of the worm A has a hexagonal head that cooperates with the driving device on the robotic arm.

[0012] As a further improvement of the present technology, in each of the two chute C on the front side wall of the roasting car, a limiting rod A that cooperates with the baffle slides horizontally along a direction parallel to the swing shaft and is installed with a spring A for resetting the limiting rod A. The end of the limiting rod A has an inclined surface A that does not prevent the baffle from swinging back and resetting around the swing shaft; the exposed end of the limiting rod A has a manual pull ring; an L-shaped rack A is fixedly connected to each limiting rod A. The two racks A with opposite moving directions slide in the front guide sleeve of the roasting car and mesh with the gear A in the guide sleeve.

[0013] As a further improvement of the present technology, a trigger rod A that cooperates with the ejector rod at the end of the track is horizontally slidable in the front chute A of the roasting cart; the tooth pattern on the trigger rod A meshes with the gear C inside the side wall of the roasting cart; a limiting rod B that cooperates with the limiting groove on the limiting wheel installed on the rotating shaft is vertically movable inside the side wall of the roasting cart, and a spring B for resetting the limiting rod B is installed; the tooth pattern on the limiting rod B meshes with the gear B on the shaft where the gear C is located; a limiting rod C that cooperates with the limiting groove on the trigger rod A and cooperates with the lifting frame in the steering mechanism is vertically slidable in the chute B at the lower end of the roasting cart, and a spring C for resetting the limiting rod C is installed.

[0014] As a further improvement of the present technology, the ends of the tracks of the preheating kiln, roasting kiln, and cooling kiln all have a stop rod that cooperates with the front wheels at the upper end of the roasting cart; fixed pulleys that cooperate with the elongated steel wire rope during the transfer of the roasting cart by the steering mechanism are installed at both the front and rear ends of the roasting cart.

[0015] As a further improvement of the present technology, the wheels at the rear of the roasting cart near the steering mechanism are installed on a wheel seat, the wheel seat is vertically slidable in the chute D at the lower end of the roasting cart, and a spring D for resetting the wheel seat is provided in the chute D; the lower end of the wheel seat has an inclined surface B that cooperates with the lifting frame that swings back and resets around the rotating column in the steering mechanism; a trigger rod D that cooperates with the lifting frame in the steering mechanism is vertically slidable in the chute E at the lower end of the roasting cart, and a spring E for resetting the trigger rod D is installed; the tooth pattern on the trigger rod D meshes with the gear D inside the side wall of the roasting cart, and the limiting rod D that meshes with the gear D cooperates with the limiting groove on the side wall of the wheel seat.

[0016] Compared with the traditional tunnel kiln roasting equipment, the present invention has the advantages that the roasting cart in the transmission ring tunnel kiln can be recycled, and the driving structure of the roasting cart in the traditional straight tunnel kiln is simple and the movement resistance is small. The present invention uses the steering mechanisms at the three corners of the equilateral triangle distribution of the kiln bodies to reverse the movement direction of the roasting cart between any two adjacent kiln bodies, so as to achieve the advantages of both the straight tunnel kiln and the ring tunnel kiln while having the advantages of the straight tunnel kiln. Since the roasting cart in the present invention loses a small part of heat due to discharging, the roasting cart that still retains most of the heat will effectively preheat the new material after reloading, achieving the purpose of energy saving. The structure of the present invention is simple and has good use effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the present invention and its top view section.

[0018] Figure 2 It is a schematic diagram of the cooperation between the steering mechanism and the kiln cart mechanism in two adjacent kilns.

[0019] Figure 3 It is a schematic diagram of the cooperation section of the lifting frame, limiting rod C, trigger rod A, and ejector rod.

[0020] Figure 4 It is a schematic cross-sectional view of the lifting frame, trigger rod D and wheel seat in cooperation.

[0021] Figure 5 It is a schematic cross-sectional view of the cooperation between any two adjacent kiln car mechanisms in each kiln.

[0022] Figure 6 It is a schematic view of the steering mechanism.

[0023] Figure 7 It is a schematic cross-sectional view of the steering mechanism from two perspectives.

[0024] Figure 8 It is a schematic view of the kiln car mechanism from two perspectives.

[0025] Figure 9 It is a schematic cross-sectional view of the kiln car mechanism.

[0026] Figure 10 It is a schematic cross-sectional view of the cooperation between trigger rod A and winding wheel in the kiln car mechanism at three local positions.

[0027] Figure 11 It is a schematic cross-sectional view of the cooperation between the baffle and two limit rods A from two perspectives.

[0028] Figure 12 It is a schematic view of the swing shaft drive.

[0029] Figure 13 It is a schematic cross-sectional view of the cooperation between limit rod D and wheel seat from two perspectives.

[0030] Figure 14 It is a schematic view of the roasting car.

[0031] Figure 15 It is a schematic cross-sectional view of the cooperation between the kiln car mechanism and the charging trough and discharging trough in the cooling kiln.

[0032] Names of reference numerals in the figure: 1, preheating kiln; 2, roasting kiln; 3, cooling kiln; 4, discharge chute; 5, loading chute; 6, track; 7, stop bar; 8, ejector rod; 9, kiln car mechanism; 10, roasting car; 11, chute A; 12, chute B; 13, chute C; 14, receiving groove; 15, chute D; 16, chute E; 17, baffle; 18, swing shaft; 19, turbine A; 20, worm A; 21, hexagon head; 22, limit rod A; 23, inclined plane A; 24, spring A; 25, rack A; 26, guide sleeve; 27, gear A; 28, winding wheel; 29, scroll spring; 30, rotating shaft; 31, limit wheel; 32, limit rod B; 33, spring B; 34, gear B; 35, gear C; 36, trigger rod A; 37, limit rod C; 38, spring C; 39, steel wire rope; 40, wheel; 41, wheel seat; 42, inclined plane B; 43, guide block; 44, guide groove; 45, spring D; 46, limit rod D; 47, gear D; 48, trigger rod D; 49, spring E; 50, steering mechanism; 51, rotating seat; 52, rotating column; 53, turbine B; 54, worm B; 55, motor; 56, L seat; 58, trapezoidal guide groove; 59, lifting seat; 60, trapezoidal guide block; 62, hydraulic cylinder; 64, lifting frame; 65, fixed pulley. Detailed implementation mode

[0033] The attached drawings are all schematic diagrams of the implementation of the present invention for facilitating the understanding of the structural operation principle. The specific product structure and proportional dimensions can be determined according to the use environment in combination with conventional technologies.

[0034] As Figure 1 shown, it includes a preheating kiln 1, a roasting kiln 2, a cooling kiln 3, a kiln car mechanism 9, and a steering mechanism 50. Among them, as Figure 1 shown, a number of kiln car mechanisms 9 connected end to end in sequence move cyclically in an equilateral triangular kiln body formed by the preheating kiln 1, the roasting kiln 2, and the cooling kiln 3; at each corner of the kiln body, a steering mechanism 50 for lifting and transferring the kiln car mechanism 9 from one row of tracks 6 to an adjacent row of tracks 6 is installed; as Figure 1 , 15 shown, at the inlet of the cooling kiln 3, there are a discharge chute 4 for facilitating the discharge of the kiln car mechanism 9 after it is transferred from the roasting kiln 2 to the cooling kiln 3 by the steering mechanism 50 and a loading chute 5 for loading the kiln car mechanism 9; as Figure 1 , 3 shown, at each corner of the kiln body, there is a structure for stopping the kiln car mechanism 9 at the end of the track 6.

[0035] As Figure 8 , 9 shown, the kiln car mechanism 9 includes a roasting car 10, a baffle 17, a swing shaft 18, a winding wheel 28, a scroll spring 29, a rotating shaft 30, a steel wire rope 39, and a wheel 40. Among them, as Figure 8 ,14 As shown, three wheels 40 that cooperate with the track 6 are installed on the triangular roasting car 10 that penetrates up and down. As Figure 4 、 13 shown, the wheel 40 at the rear end of the roasting car 10 has a structure that does not interfere with the swing-back reset of the steering mechanism 50 after the steering mechanism 50 has lifted and transferred the roasting car 10; as Figure 8 、 9 shown, a triangular baffle 17 that is driven by a driving device on the robotic arm and switches the bottom of the roasting car 10 is hinged inside the roasting car 10 through a horizontal swing shaft 18 perpendicular to its moving direction. The swing shaft 18 has a structure that self-locks at any time and unlocks at any time when driven by the driving device on the robotic arm; as Figure 11 shown, the roasting car 10 has a structure for locking the baffle 17 that closes the bottom of the roasting car 10; as Figure 9 、 10 、14 shown, a winding wheel 28 is installed in the receiving groove 14 at the front end of the roasting car 10. A steel wire rope 39 connected to the roasting car 10 in front is wound around the winding wheel 28; inside the roasting car 10, there is a volute spring 29 for resetting the rotating shaft 30 where the winding wheel 28 is located; as Figure 3 、 10 shown, the roasting car 10 has a structure that locks the rotating shaft 30 when it does not reach the end of the track 6 and unlocks the rotating shaft 30 when it reaches the end of the track 6. This structure remains in an unlocked state for the rotating shaft 30 during the process of the roasting car 10 being lifted and turned by the steering mechanism 50.

[0036] As Figure 6 、 7 shown, the steering mechanism 50 includes a turntable 51, a rotating column 52, a motor 55, an L-shaped seat 56, a lifting seat 59, a hydraulic cylinder 62, and a lifting frame 64. Among them, as Figure 1 、 7 shown, a ring sleeve A driven by a motor 55A is rotatably fitted inside the turntable 51 fixed at the corner inside the kiln body. A rotating column 52 that rotates inside the ring sleeve A and is driven by a motor 55 is nested and rotated on the ring sleeve A; an L-shaped seat 56 is installed on the rotating column 52. A lifting seat 59 driven by a hydraulic cylinder 62 slides vertically on the L-shaped seat 56. The lifting seat 59 has a lifting frame 64 for lifting the roasting car 10 from the bottom of the roasting car 10.

[0037] As Figure 6 、 7 shown, the rotating column 52 is installed with a turbine B53 that meshes with a worm B54 on the output shaft of the motor 55.

[0038] As Figure 8 、 9As shown in Fig. 12, a turbine A19 meshing with a worm A20 installed outside the roasting car 10 is mounted on the swing shaft 18, and one end of the worm A20 has a hexagonal head 21 for cooperating with the driving device on the robotic arm.

[0039] As Figure 11 、 14 shown, within both sliding grooves C13 on the front side wall of the roasting car 10, a limiting rod A22 cooperating with the baffle 17 slides horizontally along a direction parallel to the swing shaft 18, and a spring A24 for resetting the limiting rod A22 is installed. The end of the limiting rod A22 has an inclined surface A23 that does not prevent the baffle 17 from swinging back and resetting around the swing shaft 18; the exposed end of the limiting rod A22 has a manual pull ring; an L-shaped rack A25 is fixedly connected to each limiting rod A22, and the two racks A25 moving in opposite directions slide within the front guide sleeve 26 of the roasting car 10 and mesh with a gear A27 within the guide sleeve 26.

[0040] As Figure 2 、 3 shown in Fig. 14, a trigger rod A36 cooperating with the ejector rod 8 at the end of the track 6 slides horizontally within the front sliding groove A11 of the roasting car 10; the tooth pattern on the trigger rod A36 meshes with a gear C35 within the side wall of the roasting car 10; as Figure 3 、 10 shown, a limiting rod B32 cooperating with the limiting groove on the limiting wheel 31 installed on the rotating shaft 30 moves vertically within the side wall of the roasting car 10, and a spring B33 for resetting the limiting rod B32 is installed; the tooth pattern on the limiting rod B32 meshes with a gear B34 on the shaft where the gear C35 is located; a limiting rod C37 cooperating with the limiting groove on the trigger rod A36 and cooperating with the lifting frame 64 in the steering mechanism 50 slides vertically within the lower sliding groove B12 of the roasting car 10, and a spring C38 for resetting the limiting rod C37 is installed.

[0041] As Figure 3 shown, at the end of the tracks 6 of the preheating kiln 1, roasting kiln 2, and cooling kiln 3, there is a stop rod 7 cooperating with the front end wheels 40 on the roasting car 10; as Figure 2 、 5 shown, fixed pulleys 65 cooperating with the elongated steel wire rope 39 are installed at both the front and rear ends of the roasting car 10 during its transfer by the steering mechanism 50.

[0042] As Figure 4 、 13As shown in Fig. 14, the wheels on the rear of the roasting cart 10 near the steering mechanism 50 are installed on the wheel seat 41. The wheel seat 41 slides vertically in the chute D15 at the lower end of the roasting cart 10, and there is a spring D45 in the chute D15 for resetting the wheel seat 41; the lower end of the wheel seat 41 has an inclined surface B42 that cooperates with the lifting frame 64 that swings back and resets around the rotating column 52 in the steering mechanism 50; a trigger rod D48 that cooperates with the lifting frame 64 in the steering mechanism 50 slides vertically in the chute E16 at the lower end of the roasting cart 10, and a spring E49 for resetting the trigger rod D48 is installed; the tooth pattern on the trigger rod D48 meshes with the gear D47 inside the side wall of the roasting cart 10, and the limiting rod D46 that meshes with the gear D47 cooperates with the limiting groove on the side wall of the wheel seat 41.

[0043] As Figure 13 shown, two guide blocks 43 are symmetrically installed on the wheel seat 41, and the two guide blocks 43 slide in the two guide grooves 44 on the inner wall of the chute D15 respectively. As Figure 7 shown, a trapezoidal guide block 60 is provided on the lifting seat 59, and the trapezoidal guide block 60 slides in the trapezoidal guide groove 58 on the L seat 56.

[0044] The motor 55 in the present invention adopts the prior art.

[0045] Working process of the present invention: In the initial state, an equal number of kiln car mechanisms 9 are parked on the tracks 6 in the preheating kiln 1, roasting kiln 2 and cooling kiln 3, and all the kiln car mechanisms 9 are connected end to end in sequence. The lifting frame 64 of the steering mechanism 50 between the preheating kiln 1 and the roasting kiln 2 is located below the last kiln car mechanism 9 in the preheating kiln 1 and does not interact with the limit rod C37 and the trigger rod D48. The lifting frame 64 of the steering mechanism 50 between the roasting kiln 2 and the cooling kiln 3 is located below the last kiln car mechanism 9 in the roasting kiln 2 and does not interact with the limit rod C37 and the trigger rod D48. The lifting frame 64 of the steering mechanism 50 between the cooling kiln 3 and the preheating kiln 1 is located below the last kiln car mechanism 9 in the cooling kiln 3 and does not interact with the limit rod C37 and the trigger rod D48. The trigger rod A36 in the kiln car mechanism 9 at the end of the track 6 in the preheating kiln 1, roasting kiln 2 and cooling kiln 3 interacts with the corresponding ejector rod 8, the limit rod C37 is exactly opposite to the limit groove on the corresponding trigger rod A36, the limit rod B32 is not inserted into the limit groove on the corresponding limit wheel 31, and the spring B33, spring C38 and scroll spring 29 are all in a compressed state. The trigger rod A36 in other kiln car mechanisms 9 does not interact with the ejector rod 8 at the end of the corresponding track 6, the limit rod C37 is not exactly opposite to the limit groove on the corresponding trigger rod A36, the limit rod B32 is inserted into the limit groove on the corresponding limit wheel 31, and the spring B33, spring C38 and scroll spring 29 are all in a compressed state. The wheels 40 installed on the wheel seats 41 in each kiln car mechanism 9 are in contact with the corresponding tracks 6, the spring D45 is in a compressed state, the limit rod D46 is inserted into the limit groove on the wheel seat 41, and the spring E49 is in a compressed state. The lower ends of the trigger rod D48 and the limit rod C37 in each kiln car mechanism 9 protrude below the lower end of the roasting car 10. The baffle 17 in each kiln car mechanism 9 closes the bottom of the roasting car 10.

[0046] When it is necessary to use the present invention to carry out roasting of lepidolite, first load the lepidolite material into the roasting car 10 opposite to the lower part through the loading trough 5 on the cooling kiln 3. After the lepidolite material is loaded into the roasting car 10, start the three steering mechanisms 50 synchronously. The three steering mechanisms 50 synchronously and sequentially complete the actions of lifting the kiln car mechanism 9 at the end of each track 6 and transferring it to the track 6 in the next kiln body, so that all the kiln car mechanisms 9 synchronously complete the movement of one kiln car mechanism 9 parking space under the steering traction of the three steering mechanisms 50. After one kiln car mechanism 9 is filled, start the three steering mechanisms 50 synchronously once to pull all the kiln car mechanisms 9 for one parking space and make the kiln car mechanism 9 filled with lepidolite material approach the roasting kiln 2 by one parking space. After each time the three steering mechanisms 50 pull all the kiln car mechanisms 9 forward for one parking space, they have to quickly complete the reset to their initial state.

[0047] The lifting process of the steering mechanism 50 for the kiln car mechanism 9 at the end of the track 6 is as follows:

[0048] The hydraulic cylinder 62 is started, and the hydraulic cylinder 62 drives the lifting seat 59 to move vertically upward relative to the L seat 56, and the lifting seat 59 drives the lifting frame 64 to move synchronously. The lifting frame 64 first meets and interacts with the limit rod C37 and the trigger rod D48. Under the action of the lifting frame 64, the limit rod C37 is inserted upward into the limit groove on the trigger rod A36 and locks the position of the trigger rod A36. The spring C38 is further compressed, so that the limit rod B32 remains disengaged from the limit groove on the limit wheel 31. At the same time, the trigger rod D48 moves vertically upward under the action of the lifting frame 64, and the spring E49 is further compressed. The trigger rod D48 drives the limit rod D46 to disengage from the limit groove on the wheel seat 41 through the gear D47 and releases the restriction on the contraction movement of the wheel seat 41 in the slide groove D15.

[0049] When the lifting frame 64 contacts the bottom of the roasting car 10, the lifting frame 64 continues to rise and starts to lift the entire kiln car mechanism 9 synchronously. When the kiln car mechanism 9 is lifted to a height sufficient to pass over the top rod 8 around the rotating column 52, the hydraulic cylinder 62 is stopped and the motor 55 is started. The motor 55 drives the kiln car mechanism 9 to swing around the rotating column 52 to the upper side of the track 6 of the adjacent kiln body through the worm B54, the turbine B53, the rotating column 52, the L seat 56, the lifting seat 59 and the lifting frame 64.

[0050] When the steering mechanism 50 drives the kiln car mechanism 9 lifted by it to turn toward the track 6 in the adjacent kiln body, the lifted and turned kiln car mechanism 9 pulls all the kiln car mechanisms 9 behind it and located on the same track 6 to move forward synchronously through its tail wire rope 39. At the same time, the winding wheel 28 at the front end of the lifted kiln car mechanism 9 rotates under the resetting action of the corresponding vortex spring 29 and rewinds the wire rope 39.

[0051] When the lifted kiln car mechanism 9 swings about 90 degrees around the rotating column 52, the kiln car mechanism 9 in front of it moves forward exactly one parking space on the track 6 of the corresponding kiln body, and the kiln car mechanism 9 behind it moves forward exactly one parking space, and the front wheel 40 of the kiln car mechanism 9 following the lifted kiln car mechanism 9 just hits the stop rod 7 on the track 6 and stops moving. The trigger rod A36 on the kiln car mechanism 9 following the lifted kiln car mechanism 9 interacts with the push rod 8 and shrinks to a certain extent into the slide groove A11 under the action of the push rod 8, and the limit groove on the trigger rod A36 is exactly opposite to the corresponding limit rod C37, and the limit rod B32 completely leaves the limit groove on the limit wheel 31.

[0052] As the lifted kiln car mechanism 9 continues to move downward over the inner track 6 of the next kiln body under the drive of the steering mechanism 50 around the rotating column 52, the winding wheel 28 at the front end of the lifted kiln car mechanism 9 continues to rewind the steel wire rope 39 thereon. The lifted kiln car mechanism 9 elongates the steel wire rope 39 at its rear end and drives the winding wheel 28 on the following kiln car mechanism 9 to rotate. The spiral spring 29 at the front end of the kiln car mechanism 9 following the lifted kiln car mechanism 9 is further compressed.

[0053] When the lifted kiln car mechanism 9 reaches directly above the adjacent inner track 6 of the kiln body and is opposite to the discharge chute 4 and the loading chute 5, stop the operation of the motor 55 and reverse-start the hydraulic cylinder 62. The hydraulic cylinder 62 drives the kiln car mechanism 9 to fall back onto the track 6 through the L seat 56, the lifting seat 59, and the lifting frame 64.

[0054] After the kiln car mechanism 9 falls back onto the track 6, the length of the steel wire rope 39 between it and the front kiln car mechanism 9 shrinks to the shortest. The limiting groove on the limiting wheel 31 coaxial with the front winding wheel 28 of it is exactly opposite to the corresponding limiting rod B32. At this time, keep the lifting frame 64 of the steering mechanism 50 in contact with the bottom of the roasting car 10 in the kiln car mechanism 9, so that the trigger rod D48 on the kiln car mechanism 9 retracts into the corresponding chute E16, and further keep the limiting rod D46 from inserting into the limiting groove on the wheel seat 41. Then, start the motor 55. The motor 55 drives the lifting frame 64 to start disengaging from the bottom of the roasting car 10 around the rotating column 52 through a series of transmissions. The interaction between the lifting frame 64 and the inclined surface B42 at the lower end of the wheel seat 41 causes the wheel seat 41 to drive the corresponding wheel 40 to contract into the chute D15 and not hinder the disengagement of the lifting frame 64 around the rotating column 52. The spring D45 is further compressed.

[0055] When the lifting frame 64 disengages from the limiting rod C37, the limiting rod C37 instantaneously disengages from the limiting groove on the trigger rod A36 under the reset action of the spring C38. The limiting rod B32 instantaneously inserts into the limiting groove on the limiting wheel 31 under the action of the spring B33. At the same time, the limiting rod B32 drives the trigger rod A36 to move a certain distance outside the chute A11 through the gear B34 and the gear C35, and the limiting groove on the trigger rod A36 is staggered with the limiting rod C37.

[0056] When the lifting frame 64 disengages from the trigger rod D48, the lifting frame 64 is still in the state of pressing the wheel 40 against the chute D15, while the trigger rod D48 drives the limiting rod D46 to abut against the side wall of the wheel seat 41 under the action of the spring E49 through the gear D47.

[0057] When the lifting frame 64 disengages from the wheel seat 41 and the wheels 40 on the wheel seat 41, the wheel seat 41 drives the wheels 40 to instantaneously abut against the track 6 and complete the reset under the reset action of the spring D45. The trigger rod D48 drives the limit rod D46 to instantaneously insert into the limit groove on the wheel seat 41 and complete the limitation of the wheel seat 41 under the reset action of the spring E49 through the gear D47.

[0058] When the lifting frame 64 of the steering mechanism 50 completely disengages from the wheel seat 41 and the wheels 40 on the wheel seat 41, the hydraulic cylinder 62 is started. The hydraulic cylinder 62 drives the lifting frame 64 to continue moving downward to its initial height through a series of transmissions. When the lifting frame 64 swings back to the initial position around the rotating column 52, the motor 55 stops running.

[0059] Thus, the lifting and transfer process of the steering mechanism 50 for the kiln car mechanism 9 ends.

[0060] When the kiln car mechanism 9 reaches above the discharge chute 4 and below the loading chute 5 under the drive of the steering mechanism 50, first, a limit rod A22 on the kiln car mechanism 9 is pulled by the robotic arm. The limit rod A22 drives another limit rod A22 to move synchronously through two racks A25 and the gear A27 and simultaneously releases the lower swing restriction of the baffle 17 around the swing shaft 18, and the two springs A24 are further compressed. Then, the drive device on the robotic arm interacts with the hexagonal head 21 on the worm A20 to drive the worm A20 to rotate. The worm A20 drives the baffle 17 to swing downward through the turbine A19 and opens the bottom of the roasting car 10, and the roasted lepidolite material in the roasting car 10 automatically enters the discharge chute 4 to complete the discharging.

[0061] After the baffle 17 swings downward around the swing shaft 18 and passes over the two limit rods A22, the force on the limit rods A22 is removed, and the two limit rods A22 instantaneously reset under the reset action of the spring A24.

[0062] After the roasting car 10 completes the discharging, the worm A20 is rotated again through the drive device on the robotic arm. The worm A20 drives the baffle 17 to reset through the turbine and the swing shaft 18 and closes the bottom of the roasting car 10. Then, the roasting car 10 is continuously loaded through the loading chute 5. During the closing process of the baffle 17, the baffle 17 interacts with the inclined surfaces A23 on the two limit rods A22 so that the two limit rods A22 do not obstruct the closing action of the baffle 17. When the baffle 17 swings upward around the swing shaft 18 to complete the reset, the two limit rods A22 instantaneously reset under the reset action of the spring A24 and lock the closed state of the baffle 17.

[0063] Since the roasting car 10 loses a small amount of heat due to discharging, the roasting car 10 that still retains most of the heat will effectively preheat the new material after reloading, achieving the purpose of energy conservation.

[0064] In summary, the beneficial effects of the present invention are as follows: The present invention has the advantages that the roasting cart 10 in the driving annular tunnel kiln can be recycled, the driving structure of the roasting cart 10 in the traditional straight tunnel kiln is simple, and the movement resistance is relatively small. The present invention realizes the reversal of the movement direction of the roasting cart 10 between any two adjacent kiln bodies through the steering mechanism 50 at the three kiln body corners distributed in an equilateral triangle, so as to achieve the advantages of both a straight tunnel kiln and an annular tunnel kiln while having the advantages of a straight tunnel kiln.

[0065] In the present invention, since the roasting cart 10 loses a small amount of heat due to unloading, the roasting cart 10 that still retains most of the heat will effectively preheat the new material after reloading, achieving the purpose of energy conservation.

Claims

1. An energy-saving tunnel kiln roasting device, characterized in that: It includes a preheating kiln, a roasting kiln, a cooling kiln, a kiln car mechanism, and a steering mechanism. A number of kiln car mechanisms connected end to end in sequence move cyclically within an equilateral triangle-shaped kiln body formed by the preheating kiln, the roasting kiln, and the cooling kiln; at each corner inside the kiln body, there is installed a steering mechanism for lifting and transferring the kiln car mechanism from one row of tracks to an adjacent row of tracks; at the inlet of the cooling kiln, there are a discharge chute for facilitating the discharge of the kiln car mechanism after it is transferred from the roasting kiln to the cooling kiln by the steering mechanism and a loading chute for loading the kiln car mechanism. At each corner inside the kiln body, there is a structure for making the kiln car mechanism stop at the end of the track. The kiln car mechanism includes a roasting car, a baffle, a swing shaft, a winding wheel, a volute spring, a rotating shaft, a steel wire rope, and wheels. Three wheels cooperating with the tracks are installed on the triangular roasting car that penetrates up and down. The wheel at the rear end of the roasting car has a structure that does not interfere with the swing-back reset of the steering mechanism after the steering mechanism completes the lifting and transfer of the roasting car; inside the roasting car, a triangular baffle that is driven by a driving device on the robotic arm and opens and closes the bottom of the roasting car is hinged through a horizontal swing shaft perpendicular to its moving direction. The swing shaft has a structure that can lock itself at any time and unlock at any time when driven by the driving device on the robotic arm; there is a structure on the roasting car for locking the baffle that closes the bottom of the roasting car; a winding wheel is installed in the receiving groove at the front end of the roasting car, and a steel wire rope connected to the roasting car in front is wound around the winding wheel. Inside the roasting car, there is a volute spring for resetting the rotating shaft where the winding wheel is located. There is a structure on the roasting car for locking the rotating shaft when it does not reach the end of the track and unlocking the rotating shaft when it reaches the end of the track. This structure remains in the unlocked state during the process of the roasting car being lifted and turned by the steering mechanism.

2. The energy-saving tunnel kiln roasting equipment according to claim 1, characterized in that: The steering mechanism includes a rotating base, a rotating column, a motor, an L-shaped seat, a lifting seat, a hydraulic cylinder, and a lifting frame. A ring sleeve A driven by a motor A is rotationally fitted inside a rotating base fixed at the corner inside the kiln body. A rotating column that rotates inside the ring sleeve A and is driven by a motor is nested and rotated on the ring sleeve A; an L-shaped seat is installed on the rotating column, and a lifting seat driven by a hydraulic cylinder slides vertically on the L-shaped seat. The lifting seat has a lifting frame for lifting the roasting car from the bottom of the roasting car.

3. The energy-saving tunnel kiln roasting equipment according to claim 2, characterized in that: The rotating column is installed with a turbine B meshing with a worm B on the output shaft of the motor.

4. An energy-saving tunnel kiln roasting device according to claim 1, characterized in that: The swing shaft is installed with a turbine A meshing with a worm A installed outside the roasting car. One end of the worm A has a hexagonal head cooperating with the driving device on the robotic arm.

5. An energy-saving tunnel kiln roasting device according to claim 1, characterized in that: In the two chute C on the front side wall of the roasting car, a limiting rod A cooperating with the baffle slides horizontally along the direction parallel to the swing shaft and is installed with a spring A for resetting the limiting rod A. The end of the limiting rod A has an inclined surface A that does not prevent the baffle from swinging back and resetting around the swing shaft; the exposed end of the limiting rod A has a manual pull ring; an L-shaped rack A is fixedly connected to each limiting rod A. The two racks A moving in opposite directions slide in the front guide sleeve of the roasting car and mesh with the gear A inside the guide sleeve.

6. The energy-saving tunnel kiln roasting equipment according to claim 2, characterized in that: A trigger rod A that slides horizontally in the front chute A of the roasting car is engaged with a push rod at the end of the track; the tooth pattern on the trigger rod A is engaged with a gear C inside the side wall of the roasting car; a limit rod B that moves vertically inside the side wall of the roasting car is engaged with a limit groove on a limit wheel installed on a rotating shaft, and a spring B for resetting the limit rod B is installed; the tooth pattern on the limit rod B is engaged with a gear B on the shaft where the gear C is located; a limit rod C that slides vertically in the chute B at the lower end of the roasting car is engaged with a limit groove on the trigger rod A and is engaged with a lifting frame in the steering mechanism, and a spring C for resetting the limit rod C is installed.

7. An energy-saving tunnel kiln roasting device according to claim 1, characterized in that: Stop rods that cooperate with the front upper wheels of the roasting car are provided at the ends of the tracks of the preheating kiln, roasting kiln, and cooling kiln; fixed pulleys that cooperate with the elongated steel wire rope during the transfer of the roasting car by the steering mechanism are installed at both the front and rear ends of the roasting car.

8. An energy-saving tunnel kiln roasting device according to claim 1, characterized in that: The wheels on the rear of the roasting car near the steering mechanism are installed on a wheel seat, and the wheel seat slides vertically in the chute D at the lower end of the roasting car. A spring D for resetting the wheel seat is provided in the chute D; the lower end of the wheel seat has an inclined surface B that cooperates with the lifting frame that swings back and resets around the rotating column in the steering mechanism; a trigger rod D that slides vertically in the chute E at the lower end of the roasting car is engaged with the lifting frame in the steering mechanism, and a spring E for resetting the trigger rod D is installed; the tooth pattern on the trigger rod D is engaged with a gear D inside the side wall of the roasting car, and a limit rod D engaged with the gear D cooperates with the limit groove on the side wall of the wheel seat.

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