A tunnel kiln roasting and conveying equipment

Abstract

This invention belongs to the field of tunnel kiln roasting, and particularly relates to a tunnel kiln roasting and conveying device. It includes a preheating kiln, a roasting kiln, a cooling kiln, a drive mechanism, and a kiln car mechanism. Several kiln cars, connected sequentially and carrying lepidolite, pass through the preheating kiln, roasting kiln, and cooling kiln in sequence to roast the lepidolite. This invention, through the cooperation of two drive mechanisms symmetrically arranged within the three kiln bodies and the kiln car mechanisms, avoids the intermittent movement or collisions that can occur when several kiln cars are connected end-to-end within the kiln, thus effectively protecting the refractory layers A and B on the kiln car mechanisms. Furthermore, the connection between the kiln car mechanisms can be achieved without manual operation; simply pushing the following kiln car mechanism forward achieves the connection, thereby preventing injury to workers from the high temperatures of the kiln.

Description

Technical Field

[0001] This invention belongs to the field of tunnel kiln roasting, and particularly relates to a tunnel kiln roasting conveying device. Background Technology

[0002] A tunnel kiln is generally a long, straight tunnel with fixed walls and an arched ceiling on both sides and top. Kiln cars run on tracks laid at the bottom, and the ceramic blanks on the kiln cars pass through the preheating zone, high-temperature zone and cooling zone in sequence to complete the firing of metallurgical abrasives.

[0003] In tunnel kilns, several kiln cars connected end-to-end are used to fire ceramic blanks or abrasives loaded inside. Because the ceramic blanks or abrasives need to be heated and fired for a certain period in the high-temperature zone in the middle, the kiln cars need to move and stop frequently within the tunnel kiln. Due to the large mass of the kiln cars, when they start up, they may flicker due to inertia, or when they stop, they may collide with each other due to inertia. This causes vibration of the heat-resistant bricks on the kiln cars, damaging the refractory layer formed by the heat-resistant bricks.

[0004] During the traditional tunnel kiln firing process, newly arrived kiln cars and those already in the kiln will collide with each other due to the different forces exerted, which will also damage the heat-resistant bricks on the kiln cars.

[0005] In addition, the connection between the newly arrived kiln cars and the kiln cars in the kiln is usually done manually. Due to the high temperature of the kiln body, the working environment is harsh and not conducive to manual connection.

[0006] This invention designs a tunnel kiln roasting and conveying device to solve the above problems. Summary of the Invention

[0007] To address the aforementioned deficiencies in the prior art, this invention discloses a tunnel kiln roasting and conveying device, which is implemented using the following technical solution.

[0008] A tunnel kiln roasting and conveying device includes a preheating kiln, a roasting kiln, a cooling kiln, a drive mechanism, and a kiln car mechanism. Several kiln cars, connected in sequence and carrying lepidolite, pass through the preheating kiln, the roasting kiln, and the cooling kiln in sequence to roast the lepidolite. Two drive mechanisms that start and stop all kiln car mechanisms synchronously are symmetrically installed on both sides of the kiln body. The rear kiln car mechanism can be connected to the front kiln car mechanism by manual pushing, and the front kiln car mechanism can be disconnected from the rear kiln car mechanism by manual pulling.

[0009] The kiln car mechanism and the preheating kiln have a structure for rapid preheating of the lepidolite inside the kiln car mechanism.

[0010] As a further improvement to this technology, the kiln car mechanism includes a base, wheels, refractory layer A, refractory layer B, iron chains, connector A, and connector B. The base has a refractory layer A filled with lepidolite, and wheels that cooperate with the tracks are installed on the base. Several vertically distributed refractory layers B are nested outside the refractory layer A. The base and the bottom refractory layer B are connected by two iron chains that allow for vertical movement between them. Any two adjacent refractory layers B are connected by two iron chains that allow for vertical movement between them. Two guide posts on both sides of the top refractory layer B cooperate with two lifting rails on both sides of the preheating kiln. The front end of the base has a connector A, and the rear end of the base has a connector B that cooperates with the connector A on the adjacent base.

[0011] As a further improvement to this technology, the connector A includes a stud and a push rod, wherein the stud that mates with the connector B is fixed to the base, and the end of the stud has a push rod that mates with the connector B.

[0012] As a further improvement to this technology, the connector B includes a square sleeve A, a locking block, a lever A, a spring B, another square sleeve B, a spring C, a rack, a slide rod, a gear ring B, a lever B, a ring sleeve B, a spring D, and a spring E. The square sleeve B slides horizontally within the square sleeve A, which is fixed to the base, and a spring C is installed to reset the square sleeve B. Locking blocks slide within two grooves B on the inner wall of the square sleeve A, respectively, to frictionally lock the square sleeve B, which moves outwards from the square sleeve A, and are equipped with springs B to reset the locking blocks. The locking blocks have a manual release mechanism. A lever A locks the square sleeve B; the square sleeve A has a structure that locks the square sleeve B in its initial position; a sliding rod and a spring E for returning the sliding rod slide horizontally in the square sleeve B; a gear ring B, which is driven unidirectionally by the rack in the square sleeve B, is nested on the sliding rod; a ring sleeve B that is threaded with the stud on the connector A and a spring D for axially returning the ring sleeve B are also nested on the sliding rod; four levers B, which are evenly distributed circumferentially on the end face of the gear ring B, slide axially in the four grooves C on the end face of the ring sleeve B; and the circular plate on the end face of the sliding rod engages with the top rod of the connector A.

[0013] As a further improvement to this technology, a limiting rod that mates with the end face of the square sleeve B is slidably mounted in the annular sleeve A at the two sliding grooves A on the side wall of the square sleeve A, and a spring A is installed to reset the limiting rod; a rotating shaft D is rotatably fitted inside the rotating seat C inside the sliding rod, and a gear K on the rotating shaft D meshes with a gear L mounted on the sliding rod, and gear L meshes with a gear ring B; a gear H that meshes with a rack is mounted on the rotating shaft C that rotatably mates with the sliding rod, and a gear J mounted on the rotating shaft D meshes with a gear I mounted on the rotating shaft C through a one-way clutch.

[0014] As a further improvement to this technology, an air circulation device is installed between the preheating kiln and the cooling kiln to circulate the heat carried by the kiln car mechanism and the lepidolite on the kiln car mechanism into the preheating kiln.

[0015] As a further improvement to this technology, the driving mechanism includes a rotating base A, a sleeve, a screw, an internal threaded sleeve, a gear ring A, a gear A, a rotating shaft A, a motor A, a rotating sleeve A, a driving block, a blocking block, a gear D, a rotating base B, a rotating shaft B, a gear E, a rotating sleeve B, and a motor B. A rotating shaft A driven by a motor A is rotatably fitted within several rotating bases A distributed at any distance between the centers of two adjacent kiln car mechanisms on one side of the kiln body. A screw slides axially within a sleeve mounted on the rotating base A, and an internal threaded sleeve that rotatably engages with the screw is nested within the sleeve. The gear ring A of the sleeve meshes with the gear A installed on the rotating shaft A. The rotating sleeve A, which is nested and rotates on the screw, is equipped with a drive block and a blocking block that are circumferentially spaced 180 degrees apart and axially spaced. The drive block and the blocking block cooperate with the fixed block on the corresponding side of the kiln car mechanism base. The rotating sleeve B, driven by the motor B, rotates inside the rotating seat A at the inlet of the preheating kiln. The rotating shaft B, which rotates circumferentially and axially slides inside the rotating sleeve B, is in axial cooperation with other rotating seats A. The rotating seat B on the screw is in rotatable cooperation with the rotating shaft B. The gear D installed on the rotating sleeve A meshes with the gear E on the rotating shaft B.

[0016] As a further improvement to this technology, the gear B installed at one end of the rotating shaft A meshes with the gear C installed on the output shaft of the motor A.

[0017] As a further improvement to this technology, the gear F installed on the rotating sleeve B meshes with the gear G installed on the output shaft of the motor B.

[0018] Compared to traditional tunnel kiln firing equipment, this invention, through the cooperation of two drive mechanisms symmetrically arranged in the three kiln bodies and the kiln car mechanism, can avoid the situation where several kiln car mechanisms connected end to end flicker or collide with each other due to stopping and starting in the kiln body, thereby effectively protecting the refractory layer A and refractory layer B on the kiln car mechanism.

[0019] In this invention, the refractory layers A on the kiln car mechanism can be spaced apart vertically as it moves in the preheating kiln, ensuring that the material in the kiln car mechanism can be rapidly preheated. When the kiln car mechanism enters the firing kiln and cooling kiln, the refractory layers A on the kiln car mechanism will reset to ensure that the material in the kiln car mechanism does not lose heat. This ensures that after firing, the material in the kiln car mechanism can circulate the heat it carries into the preheating kiln through the air circulation device, effectively preheating the kiln car mechanism entering the preheating kiln.

[0020] In addition, the connection between the kiln car mechanisms can be achieved without manual operation. The connection between the two can be achieved simply by pushing the kiln car mechanism behind to move forward, thereby avoiding the harm to workers caused by the high temperature of the kiln body.

[0021] This invention has a simple structure and good performance. Attached Figure Description

[0022] Figure 1 This is a schematic cross-sectional view of the present invention and its overall structure.

[0023] Figure 2 It is a cross-sectional schematic diagram from two perspectives showing the cooperation between the two drive mechanisms and the kiln car mechanism.

[0024] Figure 3 This is a partial cross-sectional schematic diagram of the drive mechanism from two perspectives.

[0025] Figure 4 This is a schematic diagram of the cross-section of two adjacent kiln car mechanisms.

[0026] Figure 5 This is a cross-sectional diagram of connector A and connector B from two different perspectives.

[0027] Figure 6 This is a schematic cross-sectional view of the transmission connection between gear H and gear K.

[0028] Figure 7 This is a schematic diagram of the kiln car mechanism and its cross-section.

[0029] Figure 8 This is a schematic diagram of the cross-section of square A.

[0030] Figure 9 This is a schematic diagram of the cross-section of the slide bar and the ring sleeve B.

[0031] Figure 10 This is a schematic diagram of the lock block.

[0032] The following are the labels in the diagram: 1. Preheating kiln; 2. Firing kiln; 3. Cooling kiln; 4. Track; 5. Air circulation device; 6. Lifting rail; 7. Drive mechanism; 8. Rotary seat A; 9. Sleeve; 10. Guide key A; 11. Screw; 12. Keyway A; 13. Internal threaded sleeve; 14. Gear ring A; 15. Gear A; 16. Rotating shaft A; 17. Gear B; 18. Gear C; 19. Motor A; 20. Rotary sleeve A; 21. Drive block; 22. Gear D; 23. Rotary base B; 24. Rotating shaft B; 25. Gear E; 26. Guide key B; 27. Rotating sleeve B; 28. Gear F; 29. ​​Gear G; 30. Motor B; 31. Kiln car mechanism; 32. Base; 33. Wheel; 34. Fixing block; 35. Refractory layer A; 36. Guide rod; 37. Refractory layer B; 38. Chain; 39. Guide post; 40. Connector A; 41. 41. Stud; 42. Push rod; 43. Connector B; 44. Square sleeve A; 45. Guide groove A; 46. Slide groove A; 47. Slide groove B; 48. Guide groove B; 49. Ring sleeve A; 50. Spring A; 51. Limiting rod; 52. Locking block; 53. Guide block B; 54. Lever A; 55. Spring B; 56. Square sleeve B; 57. Guide groove C; 58. Guide block A; 59. Spring C; 60. Rack; 61. Slide rod; 62. Circular plate; 63. Shaft C; 64. Gear H; 65. One-way clutch; 66. Gear I; 67. Gear J; 68. Shaft D; 69. Rotary seat C; 70. Gear K; 71. Gear L; 72. Gear ring B; 73. Lever B; 74. Ring sleeve B; 75. Slide groove C; 76. Spring D; 77. Spring E; 78. Block; 79. Guide block C; 80. Keyway B. Detailed Implementation

[0033] The accompanying drawings are schematic diagrams illustrating embodiments of the present invention to facilitate understanding of the structural operating principle. Specific product structures and dimensions can be determined based on the usage environment and conventional technologies.

[0034] like Figure 1 As shown, it includes a preheating kiln 1, a firing kiln 2, a cooling kiln 3, a drive mechanism 7, and a kiln car mechanism 31, wherein... Figure 1 , 2 As shown in Figure 3, several kiln car mechanisms 31, connected in sequence and carrying lepidolite, sequentially pass through the preheating kiln 1, the calcining kiln 2, and the cooling kiln 3 to calcine the lepidolite; two drive mechanisms 7, which synchronously start and synchronously stop all kiln car mechanisms 31, are symmetrically installed on both sides of the kiln body; as shown in Figure 3. Figure 4 , 5 As shown in Figure 7, the rear kiln car mechanism 31 can be connected to the front kiln car mechanism 31 by manual pushing, and the front kiln car mechanism 31 can be disconnected from the rear kiln car mechanism 31 by manual pulling.

[0035] like Figure 1 , 7As shown, the kiln car mechanism 31 and the preheating kiln 1 have a structure for rapidly preheating the lepidolite inside the kiln car mechanism 31.

[0036] like Figure 7 As shown, the kiln car mechanism 31 includes a base 32, wheels 33, refractory layer A35, refractory layer B37, iron chain 38, connector A40, and connector B43, wherein... Figure 1 , 7 As shown, the base 32 has a refractory layer A35 filled with lepidolite, and wheels 33 that cooperate with the track 4 are installed on the base 32; several vertically distributed refractory layers B37 are nested outside the refractory layer A35; the base 32 and the bottom refractory layer B37 are connected by two iron chains 38 that allow vertical movement between the two; any two adjacent refractory layers B37 are connected by two iron chains 38 that allow vertical movement between the two; two guide posts 39 on both sides of the top refractory layer B37 cooperate with two lifting rails 6 on both sides inside the preheating kiln 1; the front end of the base 32 has a connector A40, and the rear end of the base 32 has a connector B43 that cooperates with the connector A40 on the adjacent base 32.

[0037] like Figure 5 , 7 As shown, the connector A40 includes a stud 41 and a push rod 42, wherein the stud 41, which mates with the connector B43, is fixed to the base 32, and the end of the stud 41 has a push rod 42 that mates with the connector B43.

[0038] like Figure 5 , 6 As shown in Figure 7, the connector B43 includes a square sleeve A44, a locking block 52, a lever A54, a spring B55, a square sleeve B56, a spring C59, a rack 60, a slide rod 61, a gear ring B72, a lever B73, a ring sleeve B74, a spring D76, and a spring E77, wherein... Figure 5 , 8 As shown in Figure 10, a square sleeve B56 slides horizontally within a square sleeve A44 fixed to the base 32, and a spring C59 is installed to reset the square sleeve B56; two sliding grooves B47 on the inner wall of the square sleeve A44 each have a locking block 52 that frictionally locks the square sleeve B56 moving outward from the square sleeve A44, and a spring B55 is installed to reset the locking block 52; the locking block 52 has a lever A54 for manually releasing the locking block 52 from locking the square sleeve B56; the square sleeve A44 has a structure for locking the initial position of the square sleeve B56; as shown in Figure 10. Figure 5 , 6 As shown, a sliding rod 61 and a spring E77 for returning the sliding rod 61 slide horizontally slide in the square sleeve B56. A gear ring B72, driven unidirectionally by the rack 60 in the square sleeve B56, is nested on the sliding rod 61. A ring sleeve B74, threadedly engaged with the stud 41 on the connector A40, and a spring D76 for axially returning the ring sleeve B74 are also nested within it. Figure 5 , 9 As shown, four levers B73, which are evenly distributed circumferentially on the end face of the gear ring B72, slide axially within four grooves C75 on the end face of the ring sleeve B74, and the circular plate 62 on the end face of the slide rod 61 engages with the push rod 42 of the connector A40.

[0039] like Figure 5 , 8 As shown, a limiting rod 51 that mates with the end face of the square sleeve B56 is slidably mounted in the annular sleeve A49 at the two sliding grooves A46 on the side wall of the square sleeve A44, and a spring A50 is installed to reset the limiting rod 51; Figure 5 , 6 As shown in Figure 8, a rotating shaft D68 is rotatably fitted inside the rotating seat C69 inside the slide rod 61. Gear K70 on the rotating shaft D68 meshes with gear L71 mounted on the slide rod 61. Gear L71 meshes with gear ring B72. Gear H64, which meshes with rack 60, is mounted on the rotating shaft C63 that rotatably fits with the slide rod 61. Gear J67 mounted on the rotating shaft D68 meshes with gear I66 mounted on the rotating shaft C63 via a one-way clutch 65.

[0040] like Figure 1 As shown, an air circulation device 5 is installed between the preheating kiln 1 and the cooling kiln 3 to circulate the heat carried by the kiln car mechanism 31 and the lepidolite on the kiln car mechanism 31 into the preheating kiln 1.

[0041] like Figure 2 , 3 As shown, the drive mechanism 7 includes a rotary base A8, a sleeve 9, a screw 11, an internal threaded sleeve 13, a gear ring A14, a gear A15, a rotating shaft A16, a motor A19, a rotating sleeve A20, a drive block 21, a blocking block 78, a gear D22, a rotary base B23, a rotating shaft B24, a gear E25, a rotating sleeve B27, and a motor B30, wherein... Figure 1 , 2As shown in Figure 3, a plurality of rotating seats A8, distributed at any center-to-center distance between two adjacent kiln car mechanisms 31, are rotatably fitted with a rotating shaft A16 driven by a motor A19. A screw 11 slides axially within a sleeve 9 mounted on the rotating seat A8. An internally threaded sleeve 13, which mates with the screw 11, is nested and rotatably mounted on the sleeve 9. A gear ring A14 mounted on the internally threaded sleeve 13 meshes with a gear A15 mounted on the rotating shaft A16. A rotating sleeve A20, nested and rotatably mounted on the screw 11, has gears circumferentially spaced 180 degrees apart and axially spaced... The drive block 21 and the blocking block 78 are spaced apart and cooperate with the fixing block 34 on the corresponding side of the base 32 of the kiln car mechanism 31; the rotating sleeve B27 driven by the motor B30 rotates inside the rotating seat A8 at the inlet of the preheating kiln 1, and the rotating shaft B24 that rotates circumferentially and slides axially with other rotating seats A8 is axially slidable inside the rotating sleeve B27; the rotating seat B23 on the screw 11 is rotatably engaged with the rotating shaft B24; the gear D22 installed on the rotating sleeve A20 meshes with the gear E25 on the rotating shaft B24.

[0042] like Figure 2 As shown, the gear B17 mounted on one end of the rotating shaft A16 meshes with the gear C18 mounted on the output shaft of the motor A19.

[0043] like Figure 2 As shown, the gear F28 mounted on the rotating sleeve B27 meshes with the gear G29 mounted on the output shaft of the motor B30.

[0044] like Figure 7 As shown, four guide rods 36 are symmetrically installed on the base 32, each corresponding to one of the four circular slots on the fire-resistant layer B37. Figure 5 , 8 As shown, two guide blocks A58, symmetrically mounted on the square sleeve B56, slide within two guide grooves A45 on the inner wall of the square sleeve A44. Figure 5 , 8 As shown in Figure 10, two guide blocks B53, symmetrically mounted on the locking block 52, slide within two guide grooves B48 on the inner wall of the corresponding slide groove B47. Figure 5 , 9 As shown, two guide blocks C79, symmetrically mounted on the slide rod 61, slide within two guide grooves C57 on the inner wall of the square sleeve B56. Figure 2 , 3 As shown, two guide keys A10, symmetrically installed inside the sleeve 9, slide in the two keyways A12 on the corresponding screw 11, and two guide keys B26, symmetrically installed on the rotating shaft B24, slide in the two keyways B80 on the inner wall of the rotating sleeve B27.

[0045] Both motor A19 and motor B30 in this invention adopt existing technologies.

[0046] The workflow of this invention is as follows: In the initial state, the driving block 21 and the blocking block 78 on each rotating sleeve A20 of the two driving mechanisms 7 are in the same horizontal plane, and the blocking block 78 is in a state of engagement with the fixing block 34 on the kiln car mechanism 31. The spring D76 in the connector B43 of the kiln car mechanism 31 is in the natural state, while springs A50, B55, C59, and E77 are all in the compressed state. The rack 60 in the connector B43 does not mesh with the gear H64. The two locking blocks 52 in the connector B43 abut against the outer wall of the square sleeve B56 under the action of the spring B55.

[0047] When the present invention is needed to roast lepidolite, lepidolite is first loaded into a kiln car mechanism 31 and mechanically pulled into the preheating kiln 1. When the two fixed blocks 34 on the kiln car mechanism 31 filled with material meet the first blocking block 78 in the corresponding drive mechanism 7 at the same time, the motors A19 in the two drive mechanisms 7 are started. At this time, most of the kiln car mechanism 31 filled with material enters the preheating kiln 1. Each drive mechanism 7's motor A19 drives the corresponding shaft A16 to rotate via gears C18 and B17. Shaft A16 drives all its gears A15 to rotate synchronously. Gears A15, through gear ring A14, drive the corresponding internal threaded sleeve 13 to rotate relative to the sleeve 9. The internal threaded sleeve 13 retracts axially into the sleeve 9 via the corresponding screw 11. The screw 11, through its rotating seat B23, drives the rotating shaft B24, which rotates with it, to move synchronously axially. Simultaneously, the screw 11, through rotating sleeve A20, drives the blocking block 78 and drive block 21 to move synchronously and slowly axially. The blocking block 78 buffers and stops the kiln car mechanism 31. As the kiln car mechanism 31 slowly stops, the motor A19's operating speed gradually decreases and eventually stops. The kiln car mechanism 31, filled with material, slowly stops as the blocking block 78 stops, and the kiln car mechanism 31's body is almost completely inside the preheating kiln 1.

[0048] Then, the second kiln car mechanism 31, which is filled with material, is pushed along the track 4 to connect to the first kiln car mechanism 31 that enters the preheating kiln 1. The first kiln car mechanism 31 that enters the preheating kiln 1 will not move due to the obstruction of the blocking block 78.

[0049] The process of connecting the two kiln car mechanisms 31 is as follows: the front connector A40 of the rear kiln car mechanism 31 cooperates with the rear connector B43 of the front kiln car mechanism 31. When the stud 41 on connector A40 meets the ring B74 in connector B43, the push rod 42 on connector A40 enters the ring B74 and has a certain distance from the circular plate 62 at the end of the slide rod 61. As the rear kiln car mechanism 31 continues to move forward under the push, the stud 41 on connector A40 drives the ring B74 to slide axially on the slide rod 61, and the spring D76 is stretched.

[0050] When the push rod 42 on the connector A40 meets the circular plate 62 on the end face of the slide rod 61, the axial movement of the ring sleeve B74 relative to the slide rod 61 stops. At this time, the slide rod 61, together with the ring sleeve B74, contracts axially relative to the square sleeve B56 under the action of the connector A40, and the spring E77 is further compressed. As the slide rod 61 continues to move into the square sleeve B56, the rack 60 and the gear H64 begin to mesh. The rack 60 drives the gear ring B72 to rotate relative to the slide rod 61 through the gear H64, the rotating shaft C63, the one-way clutch 65 which provides one-way drive, the gear I66, the gear J67, the rotating shaft D68, the gear K70, and the gear L71. The gear ring B72 drives the ring sleeve B74 to rotate relative to the slide rod 61 through the four levers B73. Under the action of the spring D76, the internal thread at the end of the ring sleeve B74 begins to screw onto the stud 41. During the axial connection of connector A40 to connector B43, the two limiting rods 51 on the square sleeve A44 of connector B43 are manually pulled outward to release the contraction restriction of the square sleeve B56 into the square sleeve A44, and the spring A50 is further compressed.

[0051] When spring E77 inside square sleeve B56 is compressed to its limit, the engagement of ring sleeve B74 on stud 41 reaches its limit and stops rotating. As the rear kiln car mechanism 31 continues to advance, square sleeve B56 begins to retract into square sleeve A44, and spring C59 is further compressed. The successive compression of springs E77 and C59 effectively buffers the connection between the rear kiln car mechanism 31 and the front kiln car mechanism 31, preventing damage to the refractory layers A35 and B37 on the two kiln car mechanisms 31 due to impact during the connection process.

[0052] When spring C59 is compressed to its limit, the movement of the rear kiln car mechanism 31 stops, and the connection between the two kiln car mechanisms 31 is completed.

[0053] Next, motor B30 is started. Motor B30 drives rotating sleeve B27 to rotate through gears G29 and F28. Rotating sleeve B27 drives rotating shaft B24 to rotate synchronously. Rotating shaft B24 drives all gears E25 on it to rotate synchronously. Gears E25 drive driving block 21 and blocking block 78 on rotating sleeve A20 to rotate 180 degrees synchronously relative to screw 11 through corresponding gear D22 and rotating sleeve A20. This makes driving block 21 on rotating sleeve A20 located behind the corresponding side fixing block 34 on the kiln car mechanism 31 that enters the preheating kiln 1.

[0054] The motors A19 in the two drive mechanisms 7 are started. Each motor A19 drives all the screws 11 in the corresponding drive mechanism 7 to retract axially into the corresponding sleeve 9 through a series of transmissions. The screws 11 drive the first kiln car mechanism 31 entering the preheating kiln 1 to start moving forward through the interaction between the drive block 21 on the rotating sleeve A20 and the corresponding side fixing block 34 of the kiln car mechanism 31, thereby reducing the power requirement for mechanically pulling the kiln car mechanism 31 forward. At the same time as the front kiln car mechanism 31 starts, the rear kiln car mechanism 31 drives the slide rod 61 to reset relative to the square sleeve B56 through the connector A40 and the ring sleeve B74. The rack 60 will not drive the gear I66 to rotate through the gear H64, the rotating shaft C63 and the one-way clutch 65 that plays an overrunning role. As a result, the ring sleeve B74 will not rotate relative to the slide rod 61 and the stud 41, thereby ensuring that the effective connection between the ring sleeve B74 and the stud 41 is not disengaged.

[0055] When the slide bar 61 returns to its original position relative to the square sleeve B56, the slide bar 61 tends to move the square sleeve B56 outward from the square sleeve A44. Because the two locking blocks 52, under the action of the spring B55, generate significant frictional locking against the square sleeve B56 moving outward from the square sleeve A44, the square sleeve B56 will not slide outward from the square sleeve A44. This ensures that the effective connection between the connector A40 and the connector B43 will not be released when the front kiln car mechanism 31 is started. At this time, the front kiln car mechanism 31, which has been running for a short time, begins to drive the rear kiln car mechanism 31 forward synchronously through the connectors A40 and B43.

[0056] After the two kiln car mechanisms 31 are started synchronously and slowly for a short period of time, the pulling force required to mechanically pull the two kiln car mechanisms 31 is small, effectively reducing the power requirement of mechanical pulling. At this time, the motors A19 in the two drive mechanisms 7 are started. The motors A19 drive the rotating sleeve A20 on the screw 11 to return to its axial position through a series of transmissions. After the rotating sleeve A20 is axially returned to its position relative to the sleeve 9, the motors B30 in the two drive mechanisms 7 are started. The motors B30 drive the drive block 21 and the blocking block 78 on the rotating sleeve A20 to rotate 180 degrees relative to the screw 11 through a series of transmissions, so that the blocking block 78 and the drive block 21 on the rotating sleeve A20 return to their initial state.

[0057] When most of the second kiln car mechanism 31 enters the preheating kiln 1, the fixed blocks 34 on the two kiln car mechanisms 31 simultaneously meet the two blocking blocks 78 on the corresponding side drive mechanisms 7. At this time, the motors A19 in the two drive mechanisms 7 are started again. The motors A19 drive the blocking blocks 78 to move axially from fast to slow through a series of transmissions and finally achieve synchronous buffering and stopping of the two kiln car mechanisms 31, so as to avoid the two kiln car mechanisms 31 colliding with each other due to inertia during the stopping process in the kiln.

[0058] Next, the third kiln car mechanism 31 filled with material is connected to the second kiln car mechanism 31 that enters the preheating kiln 1. The connection process is the same as the process of connecting the second kiln car mechanism 31 to the first kiln car mechanism 31, and will not be repeated here.

[0059] Each connection of a kiln car mechanism 31 requires all kiln car mechanisms 31 within the kiln to move and stop at one position. Adding any kiln car mechanism 31 only requires manual pushing of the new kiln car mechanism 31 from outside the kiln into the kiln, achieving a buffered connection between the kiln car mechanisms 31. Simultaneously, the simultaneous movement and stopping of all kiln car mechanisms 31 within the kiln due to the connection of a new kiln car mechanism 31 is prevented from causing collisions due to inertia during these stops and starts, thanks to the synchronous start and slow stop of all kiln car mechanisms 31 by the two drive mechanisms 7. This protects the refractory layers A35 and B37 on the kiln car mechanism 31 from damage.

[0060] When the kiln car mechanism 31 enters the cooling kiln 3 from the calcining kiln 2, the heat contained in the kiln car mechanism 31 itself and the lithium mica material it carries enters the preheating kiln 1 through the air circulation device 5 to effectively preheat the lithium mica material in the kiln car mechanism 31 that has just entered the preheating kiln 1.

[0061] After the kiln car mechanism 31 enters the preheating kiln 1, the guide columns 39 on both sides of the uppermost refractory layer B37 of the kiln car mechanism 31 cooperate with the two lifting rails 6 on the inner wall of the preheating kiln 1, so that all the refractory layers B37 on the kiln car mechanism 31 move vertically upward and create a certain gap between them, temporarily and effectively reducing the thickness of the refractory material around the lepidolite, so that the lepidolite in the refractory layer A35 can be preheated quickly and effectively. When the kiln car mechanism 31 leaves the preheating kiln 1 and enters the calcining kiln 2, the refractory layer B37 on the kiln car mechanism 31 automatically falls back to increase the thickness of the refractory material around the lepidolite, which facilitates the effective heating and calcination of the lepidolite.

[0062] After the kiln car mechanism 31 exits the cooling kiln 3, the connector A40 and connector B43 can be separated by unscrewing the ring sleeve B74 away from the stud 41 using a tool. After the connector A40 and connector B43 are separated, the kiln car exiting the cooling kiln 3 is mechanically pulled away for unloading. After unloading, the two levers A54 on the connector B43 are manually moved to release the two locking blocks 52 from locking the square sleeve B56. The square sleeve B56 is instantly reset under the action of the spring C59.

[0063] In summary, the beneficial effects of the present invention are as follows: the present invention, through the cooperation of two drive mechanisms 7 symmetrically arranged in the three kiln bodies and kiln car mechanism 31, can avoid the situation where several kiln car mechanisms 31 connected end to end flash or collide with each other due to stopping and starting in the kiln body, thereby effectively protecting the refractory layer A35 and refractory layer B37 on the kiln car mechanism 31.

[0064] In this invention, the refractory layers A35 on the kiln car mechanism 31 can be spaced apart vertically as it moves in the preheating kiln 1, ensuring that the material in the kiln car mechanism 31 can be preheated quickly. When the kiln car mechanism 31 enters the firing kiln 2 and the cooling kiln 3, the refractory layers A35 on the kiln car mechanism 31 will reset to ensure that the material in the kiln car mechanism 31 does not lose heat. This ensures that after firing, the material in the kiln car mechanism 31 can circulate the heat it carries into the preheating kiln 1 through the air circulation device 5, effectively preheating the kiln car mechanism 31 that has entered the preheating kiln 1.

[0065] In addition, the connection between the kiln car mechanisms 31 can be achieved without manual operation. The connection can be achieved simply by pushing the kiln car mechanism 31 behind to move forward, thereby avoiding the harm to workers caused by the high temperature of the kiln body.

Claims

1. A tunnel kiln roasting and conveying device, characterized in that: It includes a preheating kiln, a calcining kiln, a cooling kiln, a drive mechanism, and a kiln car mechanism. Several kiln car mechanisms, connected in sequence and carrying lepidolite, pass through the preheating kiln, the calcining kiln, and the cooling kiln in sequence to calcine the lepidolite. Two drive mechanisms that start and stop all kiln car mechanisms synchronously are symmetrically installed on both sides of the kiln body. The rear kiln car mechanism can be connected to the front kiln car mechanism by manual pushing, and the front kiln car mechanism can be disconnected from the rear kiln car mechanism by manual pulling. The kiln car mechanism and the preheating kiln have a structure for rapid preheating of the lepidolite inside the kiln car mechanism; The kiln car mechanism includes a base, wheels, refractory layer A, refractory layer B, chains, connector A, and connector B. The base has a refractory layer A filled with lepidolite, and wheels that mate with tracks are mounted on the base. Several vertically distributed refractory layers B are nested around refractory layer A. The base and the bottom refractory layer B are connected by two chains that allow for vertical movement between them. Any two adjacent refractory layers B are also connected by two chains that allow for vertical movement between them. Two guide posts on either side of the top refractory layer B mate with two lifting tracks on either side of the preheating kiln. The front end of the base has connector A, and the rear end of the base has connector B that mates with connector A on the adjacent base. The connector A includes a stud and a push rod, wherein the stud that mates with the connector B is fixed to the base, and the end of the stud has a push rod that mates with the connector B; The connector B includes a square sleeve A, a locking block, a lever A, a spring B, another square sleeve B, a spring C, a rack, a slide rod, a gear ring B, a lever B, a ring sleeve B, a spring D, and a spring E. The square sleeve B slides horizontally within the square sleeve A, which is fixed to the base, and is equipped with a spring C for resetting the square sleeve B. Locking blocks slide within two grooves B on the inner wall of the square sleeve A, providing frictional locking to the square sleeve B which moves outwards from the square sleeve A, and are equipped with springs B for resetting the locking blocks. The locking blocks have a function to manually release the locking blocks from locking the square sleeve B. The lever A; the square sleeve A has a structure for locking the initial position of the square sleeve B; a sliding rod and a spring E for returning the sliding rod slide horizontally in the square sleeve B; a gear ring B driven unidirectionally by the rack in the square sleeve B is nested on the sliding rod, and a ring sleeve B that is threaded with the stud on the connector A and a spring D for axially returning the ring sleeve B are nested in it; four levers B evenly distributed circumferentially on the end face of the gear ring B slide axially in the four grooves C on the end face of the ring sleeve B; the circular plate on the end face of the sliding rod cooperates with the top rod of the connector A. A limiting rod that mates with the end face of the square sleeve B is slidably mounted in the annular sleeve A at the two sliding grooves A on the side wall of the square sleeve A, and a spring A is installed to reset the limiting rod; a rotating shaft D is rotatably fitted inside the rotating seat C inside the slide rod, and a gear K on the rotating shaft D meshes with a gear L mounted on the slide rod, and gear L meshes with a gear ring B; a gear H that meshes with a rack is mounted on the rotating shaft C that rotatably mates with the slide rod, and a gear J mounted on the rotating shaft D meshes with a gear I mounted on the rotating shaft C through a one-way clutch.

2. The tunnel kiln roasting and conveying equipment according to claim 1, characterized in that: An air circulation device is installed between the preheating kiln and the cooling kiln to circulate the heat carried by the kiln car mechanism and the lepidolite on the kiln car mechanism into the preheating kiln.

3. The tunnel kiln roasting and conveying equipment according to claim 1, characterized in that: The driving mechanism includes a rotating base A, a sleeve, a screw, an internal threaded sleeve, a gear ring A, a gear A, a rotating shaft A, a motor A, a rotating sleeve A, a driving block, a blocking block, a gear D, a rotating base B, a rotating shaft B, a gear E, a rotating sleeve B, and a motor B. A rotating shaft A, driven by a motor A, is rotatably fitted within several rotating bases A distributed at any distance between the centers of two adjacent kiln car mechanisms on one side of the kiln body. A screw slides axially within a sleeve mounted on the rotating base A, and an internal threaded sleeve, which rotatably engages with the screw, is nested within the sleeve. A gear ring A is installed within the internal threaded sleeve. A drive block and a blocking block are mounted on a rotating sleeve A, which is nested and rotates around a screw. The drive block and the blocking block are circumferentially spaced 180 degrees apart and axially spaced. The drive block and the blocking block cooperate with the fixed block on the corresponding side of the kiln car mechanism base. A rotating sleeve B driven by a motor B rotates inside a rotating seat A at the inlet of the preheating kiln. A rotating shaft B, which rotates circumferentially and axially slides inside the rotating sleeve B, is in axial cooperation with other rotating seats A. The rotating seat B on the screw is rotatably engaged with the rotating shaft B. The gear D mounted on the rotating sleeve A meshes with the gear E on the rotating shaft B.

4. The tunnel kiln roasting and conveying equipment according to claim 3, characterized in that: The gear B installed at one end of the rotating shaft A meshes with the gear C installed on the output shaft of the motor A.

5. The tunnel kiln roasting and conveying equipment according to claim 3, characterized in that: The gear F mounted on the rotating sleeve B meshes with the gear G mounted on the output shaft of the motor B.

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