Automatic feeding system of tunnel kiln

Abstract

The utility model relates to the technical field of grinding wheel production, in particular to an automatic feeding system of a tunnel kiln, which comprises the tunnel kiln arranged on the ground, a corresponding track outside the tunnel kiln is arranged on the ground at the position of a feeding port of the tunnel kiln, and a placing mechanism is arranged on one side of the tunnel kiln. The placing mechanism comprises a first rail and a first pushing assembly which are installed on the ground, the length direction of the first rail is parallel to the length direction of the tunnel kiln, a plurality of placing frames used for containing materials are arranged on the first rail, and the first pushing assembly can push the placing frames to the conveying mechanism; a conveying mechanism used for conveying the containing frames to the corresponding rails outside the tunnel kiln is arranged on the ground, and a pushing mechanism outside the tunnel kiln is arranged outside the tunnel kiln and used for pushing the containing frames on the corresponding rails outside the tunnel kiln into the tunnel kiln. The device has the technical effects of saving labor and improving the working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding wheel production, in particular to an automatic feeding system for a tunnel kiln. Background Art

[0002] In the production process of grinding wheels, the resin in the resin grinding wheel needs to be cured at high temperature, and the grinding wheel needs to be pushed into the tunnel kiln for heating. When the conveyed grinding wheel factory performs high-temperature curing on the resin grinding wheel, workers need to push the first conveyor car into the tunnel kiln. Not only is the labor intensity of the workers high and the work efficiency low, but the time for the manual operation of the grinding wheel to enter the kiln is sometimes improperly controlled, resulting in uncertainty in the heating time of the grinding wheel in the entire tunnel kiln. Utility Model Content

[0003] The embodiment of the utility model provides an automatic feeding system for a tunnel kiln, which has the technical effect of saving manpower and improving work efficiency.

[0004] The utility model is a tunnel kiln self-feeding feeding system, which adopts the following technical solutions:

[0005] An automatic feeding system for a tunnel kiln comprises a tunnel kiln arranged on the ground, a kiln-outside corresponding track is arranged on the ground at the feed port of the tunnel kiln, a placing mechanism is arranged on one side of the tunnel kiln, the placing mechanism comprises a first track and a first pushing assembly installed on the ground, the length direction of the first track is arranged parallel to the length direction of the tunnel kiln, a plurality of placing racks for holding materials are arranged on the first track, the first pushing assembly can push the placing racks onto a conveying mechanism, a conveying mechanism for conveying the placing racks to the kiln-outside corresponding track is arranged on the ground, and a kiln-outside pushing mechanism for pushing the placing racks on the kiln-outside corresponding track into the tunnel kiln is arranged outside the tunnel kiln.

[0006] Furthermore, the placement mechanism also includes a limiting component, which includes an oil cylinder and a support limiting plate. A second mounting groove is provided on the ground, the oil cylinder is fixed to the bottom of the second mounting groove, and two support limiting plates are respectively arranged on both sides of the top of the second mounting groove. The support limiting plate includes a supporting bottom plate and a limiting plate that are vertically arranged and fixed. The supporting bottom plate is fixed to the ground, and a first connecting plate is provided above the supporting bottom plate. First fixed plates are fixed on both sides of the first connecting plate. A movable plate is provided between the two first fixed plates, one end of the movable plate is hinged to the first fixed plate, and a driving shaft is fixed to the other end of the movable plate. A waist-shaped hole for sliding the driving shaft is provided on the first fixed plate. An inclined surface is provided on the top surface of the limiting plate, and the top surface of the limiting plate is lower on one side close to the oil cylinder. The end of the driving shaft extends out of the waist-shaped hole and rests on the inclined surface. The piston rod of the oil cylinder is fixed to the bottom of the first connecting plate, and a connecting shaft is connected to the bottom of the placement frame. Both ends of the connecting shaft are equipped with first rollers that slide on the first track. When the piston rod of the oil cylinder is extended, the end of the movable plate away from the oil cylinder moves upward and is the same height as the connecting shaft.

[0007] Furthermore, a first installation groove is opened on the ground, and the first pushing assembly includes a first sprocket and a second sprocket installed in the first installation groove. The first sprocket and the second sprocket are connected by a first chain. A first motor that drives the second sprocket to rotate is arranged in the first installation groove, and a first push plate that drives the placement rack to move toward the conveying mechanism is fixed on the first chain.

[0008] Furthermore, the conveying mechanism includes a first conveying vehicle and a second track, a third mounting groove is opened on the ground, the two second tracks are arranged in parallel in the third mounting groove, the first conveying vehicle can move along the length direction of the second track, two third tracks arranged in parallel are fixed on the bottom plate of the first conveying vehicle, the height of the third track is the same as the height of the first track, a first support plate is fixed on the side of the bottom plate of the first conveying vehicle away from the first track, two first slide rails arranged in parallel are fixed on the bottom plate of the first conveying vehicle, the length direction of the first slide rail is parallel to the length direction of the third rail, the first slide rail extends to the first support plate, and the second support plate is slidably connected above the first slide rail; the conveying mechanism also includes a second pushing assembly and a first driving assembly that drives the second support plate to slide, and the second pushing assembly includes a second push plate installed on the second support plate.

[0009] Furthermore, the second pushing assembly also includes a U-shaped plate, two second fixed plates arranged in parallel are fixed on the first supporting plate, the U-shaped plate is located between the two second fixed plates, two second push plates are arranged, one of the second push plates is located between the U-shaped plate and one of the second fixed plates, and the other second push plate is located between the U-shaped plate and the other second fixed plate, a first rotating shaft is fixed on the U-shaped plate, and the second push plate is rotatably connected to the first rotating shaft, an iron plate is fixed on the side wall of one of the second push plates, an electromagnet for adsorbing and fixing the iron plate is installed on the top of the U-shaped plate, a semicircular return groove is provided on the second fixed plate, a return rod is fixed on the second push plate, the return rod is located directly below the first rotating shaft, and the return rod is located in the return groove.

[0010] When the electromagnet is powered off, the second push plate rotates along the rotating shaft toward one side of the placement frame. When the second push plate rotates, the first driving assembly drives the second support plate to move toward the direction of the tunnel kiln again, and the return rod is disengaged from the top of the return groove. A limit block for limiting the second push plate is fixed on the side wall of the U-shaped plate. When the second push plate is rotated 90 degrees and is in a horizontal state, the limit block limits the second push plate to prevent the second push plate from continuing to rotate.

[0011] When the first driving assembly drives the second support plate to move away from the tunnel kiln, the return rod first contacts the top arc of the return groove. As the second support plate moves, the return rod slides along the arc direction of the return groove, thereby causing the second push plate to rotate along the first rotating shaft, and the second push plate rotates from a horizontal state to a vertical state.

[0012] Furthermore, a first mounting rod is fixed on the top of the U-shaped plate, a second mounting rod is fixed on the side of the electromagnet close to the first mounting rod, the second mounting rod passes through the first mounting rod, a spring is fixed between the electromagnet and the first mounting rod, and the spring is sleeved with the second mounting rod.

[0013] Furthermore, the first driving assembly includes a gear, a rack and a second motor, the rack is fixed on the bottom plate of the first conveyor vehicle, the rack is located between the two first slide rails, the gear is meshed with the rack, the gear is located below the second support plate, the second motor is fixed on the second support plate, and the output shaft of the second motor is fixed to the gear.

[0014] Furthermore, a third support plate is fixed on the ground outside the tunnel kiln, the third support plate is located on one side of the corresponding track outside the kiln, two second slide rails are fixed on the third support plate, a fourth support plate is slidably arranged above the second slide rails, the pushing mechanism outside the kiln includes a baffle assembly and a second driving assembly that drives the fourth support plate to slide along the second slide rails, the baffle assembly includes a mounting plate and a baffle, the mounting plate is fixed on the fourth support plate, the bottom of the baffle is rotatably connected to the mounting plate, and a driving member that drives the baffle to rotate is arranged on the fourth support plate.

[0015] Further, the driving member includes a third sprocket, a fourth sprocket and a third motor, the third sprocket is fixed to the second rotating shaft, the third sprocket and the fourth sprocket are connected by a second chain, and the third motor is fixed to the fourth supporting plate and drives the fourth sprocket to rotate.

[0016] Furthermore, a tension spring is connected between the side wall of the blocking rod and the fourth supporting plate.

[0017] Compared with the prior art, this application has the following technical effects:

[0018] 1. The placement rack is automatically transported by the placement mechanism, conveying mechanism and kiln push mechanism set outside the tunnel kiln, which reduces the labor intensity of the staff and improves the work efficiency;

[0019] 2. The placement rack located on the first track close to the conveying mechanism is limited by the limiting assembly, thereby preventing the placement rack from sliding toward the conveying mechanism;

[0020] 3. Push the placement rack twice to the corresponding track outside the kiln, and move the placement rack along the corresponding track outside the kiln for a distance, so that the kiln pushing mechanism outside the kiln can push the placement rack into the tunnel kiln;

[0021] 4. When the lever rotates, the tension spring can slow down the vibration of the lever, allowing the lever to rotate smoothly and increasing the stability of the lever. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present invention, and do not constitute a limitation of the present invention. In the drawings:

[0023] Figure 1 To embody the overall structural schematic diagram of the utility model;

[0024] Figure 2 A schematic diagram showing the placement mechanism of the present utility model;

[0025] Figure 3 A schematic diagram showing the first pushing component in the utility model;

[0026] Figure 4 A schematic diagram showing the position limiting assembly of the present invention;

[0027] Figure 5 A schematic diagram showing a placement rack in the utility model;

[0028] Figure 6 A schematic diagram showing the position limiting assembly of the utility model for limiting the connecting rod;

[0029] Figure 7A schematic diagram showing that the placement rack in the utility model is located on the first conveying vehicle;

[0030] Figure 8 A schematic diagram showing the first transport vehicle in the present utility model;

[0031] Fig. 9 A schematic diagram showing the second pushing component in the present utility model;

[0032] Fig.10 A schematic diagram showing that the second push plate in the utility model is in a horizontal state;

[0033] Fig.11 A schematic diagram showing the external pushing mechanism of the kiln in the utility model;

[0034] Fig.12 A schematic diagram of a middle stop bar assembly of the utility model;

[0035] Fig.13 It is a schematic diagram of the second transport vehicle and the tractor in the utility model.

[0036] Description of reference numerals: 1. placement mechanism; 11. first track; 12. first pushing assembly; 121. first sprocket; 122. second sprocket; 123. first chain; 124. first motor; 125. first pushing plate; 13. limiting assembly; 131. oil cylinder; 132. supporting limiting plate; 1321. supporting bottom plate; 1322. limiting plate; 133. first connecting plate; 134. first fixing plate; 1341. waist-shaped hole; 135. movable plate; 1351. hinge shaft; 1352. driving shaft; 13 6. first inclined surface; 137. second inclined surface; 2. conveying mechanism; 21. first conveying vehicle; 211. third track; 2111. stopper; 212. first slide rail; 213. first support plate; 214. second support plate; 215. first slide block; 22. second push assembly; 221. second fixed plate; 2211. return groove; 222. U-shaped plate; 2221. first mounting rod; 2222. stopper; 223. second push plate; 2231. push block; 2232. iron plate; 2233. return rod ; 2234, connecting rod; 224, first rotating shaft; 225, electromagnet; 2251, second mounting rod; 2252, spring; 23, first driving assembly; 231, rack; 232, gear; 233, second motor; 3, kiln outer pushing mechanism; 31, stop rod assembly; 311, mounting plate; 312, stop rod; 313, second rotating shaft; 314, driving member; 3141, third sprocket; 3142, fourth sprocket; 3143, second chain; 3144, third motor; 315, tension spring; 32, The second driving assembly; 33, the third supporting plate; 331, the second slide rail; 34, the fourth supporting plate; 341, the second sliding block; 4, the placing rack; 41, the connecting shaft; 42, the first fixing block; 43, the first roller; 5, the tunnel kiln; 51, the corresponding track outside the kiln; 6, the ground; 61, the first mounting groove; 62, the second mounting groove; 63, the third mounting groove; 631, the second track; 7, the fourth mounting groove; 71, the fourth track; 72, the second transport vehicle; 721, the fifth track; 8, the tractor; 81, the tractor track. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with the implementation mode and the accompanying drawings. Here, the schematic implementation mode of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0038] Reference Figure 1 and Figure 2, an automatic feeding system for a tunnel kiln, comprising a placing mechanism 1, a conveying mechanism 2, a kiln-outside pushing mechanism 3 and a placing rack 4, on which a plurality of grinding wheels to be cured at high temperature are placed. Three tunnel kilns 5 are arranged in sequence on the ground 6, two placing mechanisms 1 are located on one side of the tunnel kiln 5, a plurality of placing racks 4 are located on the placing mechanism 1, and a corresponding track 51 outside the kiln is arranged at the position of the kiln head feeding port of the tunnel kiln 5. The conveying direction of the conveying mechanism 2 is arranged perpendicularly to the length direction of the tunnel kiln 5, and the length direction of the placing mechanism 1 is arranged perpendicularly to the conveying direction of the conveying mechanism 2. The conveying mechanism 2 is located on one side of the placing mechanism 1 and the tunnel kiln 5. The conveying mechanism 2 can convey the placing rack 4 on the placing mechanism 1 to the corresponding track 51 outside the kiln, and the kiln-outside pushing mechanism 3 can push the placing rack 4 into the tunnel kiln 5.

[0039] Reference Figure 3 , Figure 4 and Figure 5 The placement mechanism 1 includes a first track 11, a first pushing assembly 12 and a limiting assembly 13. The two first tracks 11 are arranged in parallel and laid on the ground 6. The first pushing assembly 12 and the limiting assembly 13 are both located between the two first tracks 11. A plurality of placement racks 4 are placed on the first track 11. A connecting shaft 41 is arranged at the bottom of the placement rack 4. A first fixing block 42 is fixed at the bottom of the placement rack 4. The connecting shaft 41 passes through the first fixing block 42. First rollers 43 are installed at both ends of the connecting shaft 41. The first rollers 43 can roll along the first track 11. The limiting assembly 13 can limit the placement rack 4 close to the conveying mechanism 2 from moving in the direction of the conveying mechanism 2. The first pushing assembly 12 can push the placement rack 4 away from the conveying mechanism 2 to move in the direction of the conveying mechanism 2, thereby pushing all the placement racks 4 on the first track 11 to move in the direction of the conveying mechanism 2 in turn.

[0040] The first pushing assembly 12 includes a first sprocket 121 and a second sprocket 122. A first mounting groove 61 is provided on the ground 6. The first sprocket 121 and the second sprocket 122 are both mounted in the first mounting groove 61. The first sprocket 121 and the second sprocket 122 are connected by a first chain 123. A first motor 124 is fixed in the first mounting groove 61 to drive the second sprocket 122 to rotate. The length direction of the first chain 123 is arranged along the length direction of the first track 11. Figure 2 A first push plate 125 is fixed on the first chain 123 . When the first chain 123 rotates, the first push plate 125 moves along with the first chain 123 . The first push plate 125 pushes the placement rack 4 to move in the direction of the conveying mechanism 2 .

[0041] Reference Figure 4 , Figure 5 and Figure 6A second mounting groove 62 is provided on the ground 6, and the limiting assembly 13 includes a cylinder 131 and a supporting limiting plate 132. The cylinder 131 is fixed at the bottom of the second mounting groove 62, and the supporting limiting plate 132 includes a support 1321 and a limiting plate 1322 which is perpendicular to and fixed to the supporting plate 1321. The top surface of the limiting plate 1322 is respectively provided with a first inclined surface 136 and a second inclined surface 137, and the inclination angle of the first inclined surface 136 is relatively large.

[0042] A first connecting plate 133 is arranged above the second mounting groove 62, and first fixing plates 134 are fixed on both sides of the first connecting plate 133. Two movable plates 135 are arranged between the two first fixing plates 134, and one end of the movable plate 135 is hinged to the first fixing plate 134 through a hinge shaft 1351. A driving shaft 1352 is fixed between the two movable plates 135, and both ends of the driving shaft 1352 extend out of the movable plate 135. The first fixing plate 134 is provided with a waist-shaped hole 1341, and the driving shaft 1352 passes through the waist-shaped hole 1341. When the driving shaft 1352 rests on the first inclined surface 136, it is the initial position of the driving shaft 1352. The movable plate 135 can rotate along the hinge shaft 1351, and when the movable plate 135 rotates, the driving shaft 1352 slides in the waist-shaped hole 1341.

[0043] The piston rod of the cylinder 131 is fixed to the bottom of the first connecting plate 133. When the cylinder 131 drives the first connecting plate 133 to move, the movable plate 135 rotates, thereby lifting the end of the movable plate 135 away from the hinge shaft 1351. The end of the movable plate 135 away from the hinge shaft 1351 is lifted to the same height as the connecting shaft 41, thereby limiting the connecting shaft 41 and thus limiting the placement rack 4.

[0044] When the first chain 123 drives the push plate to push the placement rack 4 close to the conveying mechanism 2 onto the conveying mechanism 2, the placement rack 4 located on the first track 11 close to the conveying mechanism 2 is limited by the limiting assembly 13, thereby preventing the placement rack 4 from sliding toward the conveying mechanism 2.

[0045] Reference Figure 1 , Figure 7 and Figure 8 The conveying mechanism 2 includes a second rail 631 and a first conveying vehicle 21. The length direction of the second rail 631 is perpendicular to the length direction of the first rail 11. A third mounting groove 63 is provided on the ground 6. Two second rails 631 are installed in the third mounting groove 63. The first conveying vehicle 21 is provided on the second rail 631. A third rail 211 is fixed on the bottom plate of the first conveying vehicle 21. The length direction of the two third rails 211 is parallel to the length direction of the first rail 11. The first rail 11 and the third rail 211 have the same structure. The height of the third rail 211 is equal to the height of the first rail 11.

[0046] When the placement rack 4 on the first track 11 needs to be pushed onto the first transport vehicle 21, the third track 211 on the first transport vehicle 21 is aligned with the corresponding first track 11, and the first chain 123 drives the first push plate 125 to push the placement rack 4 onto the third track 211 on the first transport vehicle 21. A stopper 2111 is fixed at the end of the third track 211, and the stopper 2111 can prevent the first transport vehicle 21 from escaping from the end of the third track 211 away from the first track 11.

[0047] Reference Figure 8 , Fig. 9 and Fig.10 The conveying mechanism 2 further includes a second pushing assembly 22 and a first driving assembly 23, which work together to push the placement rack 4 from the first conveying vehicle 21 to the corresponding track 51 outside the kiln. A first support plate 213 is fixed to one side of the bottom plate of the first conveying vehicle 21. When the third track 211 is aligned with the first track 11, the first support plate 213 is located on the side of the bottom plate of the first conveying vehicle 21 away from the first track 11.

[0048] Two first slide rails 212 are fixed on the bottom plate of the first transport vehicle 21, and the length direction of the first slide rail 212 is arranged parallel to the length direction of the third rail 211. The first slide rail 212 extends to the first support plate 213, and a second support plate 214 is arranged above the first support plate 213. Two first sliders 215 are fixed below the second support plate 214, and one first slider 215 corresponds to one first slide rail 212. The second support plate 214 can slide along the length direction of the first slide rail 212, and the first driving assembly 23 can drive the second support plate 214 to slide along the first slide rail 212.

[0049] The first driving assembly 23 includes a rack 231, a gear 232 and a second motor 233. The rack 231 is fixed on the bottom plate of the first conveyor 21, and the rack 231 is located between the two first slide rails 212. The gear 232 is meshed with the rack 231. The second motor 233 is fixed on the second support plate 214 and drives the gear 232 to rotate. The rotating shaft of the gear 231 is connected to the second motor 223 through a belt and a pulley.

[0050] Two parallel second fixing plates 221 are fixed on the first support plate 213, and the second support plate 214 is located between the two second fixing plates 221. The second pushing assembly 22 includes a U-shaped plate 222 and a second push plate 223. Two second push plates 223 are provided, one of which is located between the U-shaped plate 222 and one of the second fixing plates 221, and the other second push plate 223 is located between the U-shaped plate 222 and the other second fixing plate 221. A first rotating shaft 224 is fixed on the U-shaped plate 222, and the second push plate 223 is rotatably connected to the first rotating shaft 224. The top ends of the two second push plates 223 are fixed by connecting rods 2234. The second push plate 223 can rotate 90 degrees along the first rotating shaft 224. The initial state of the second push plate 223 is a vertical state. After rotating 90 degrees, the second push plate 223 is a horizontal state.

[0051] A push block 2231 is fixed on the second push plate 223, and the push block 2231 contacts the first transport vehicle 21. An iron plate 2232 is fixed on the side wall of one of the push plates. A first mounting rod 2221 is fixed on the top of the U-shaped plate 222. A second mounting rod 2251 is arranged on the first mounting rod 2221, and the second mounting rod 2251 penetrates the first mounting rod 2221. An electromagnet 225 is fixed on one end of the second mounting rod 2251 close to the iron plate 2232. A spring 2252 is fixed between the electromagnet 225 and the first mounting rod 2221, and the spring 2252 is sleeved on the second mounting rod 2251. When the electromagnet 225 is energized, the electromagnet 225 is fixed to the iron plate 2232 by adsorption.

[0052] A semicircular return groove 2211 is provided on the second fixed plate 221, and a return rod 2233 is fixed on the second push plate 223. The return rod 2233 is located in the return groove 2211 and is located directly below the rotating shaft. A limiting block 2222 is fixed on the side wall of the U-shaped plate. When the second push plate 223 rotates 90 degrees and is in a horizontal state, the second push plate 223 abuts against the limiting block 2222. The limiting block 2222 limits the second push plate 223 to prevent the second push plate 223 from continuing to rotate. When the first driving assembly 23 drives the second supporting plate 214 to move away from the tunnel kiln 5, the return rod 2233 first contacts the top arc of the return groove 2211, and as the second supporting plate 214 moves, the return rod 2233 slides along the arc direction of the return groove 2211, thereby causing the second push plate 223 to rotate along the rotating shaft, and the second push plate 223 rotates from a horizontal state to a vertical state.

[0053] When the placement rack 4 is pushed onto the corresponding track 51 outside the kiln, first, the first conveyor 21 aligns the third track 211 with the corresponding track 51 outside the kiln, and the first drive assembly 23 drives the second push plate 223 and the push block 2231 in the vertical state to push the placement rack 4 to move in the direction of the tunnel kiln 5. When the placement rack 4 moves to the middle position in the length direction of the rack 231, the first drive assembly 23 drives the second support plate 214 to move away from the tunnel kiln 5, and the second push plate 223 returns to the initial position. After that, the electromagnet 225 is powered off, and under the action of the elastic force of the spring 2252 and the gravity of the second push plate 223, the second push plate 223 is more likely to rotate. After rotating 90 degrees, the second push plate 223 is in a horizontal state. Then the first drive assembly 23 continues to drive the second support plate 214 to move in the direction of the tunnel kiln 5. At this time, the top of the second push plate 223 abuts against the placement rack 4, and continues to drive the placement rack 4 to move in the direction of the tunnel kiln 5, and finally pushes the placement rack 4 to the corresponding track 51 outside the kiln.

[0054] By pushing the placement rack 4 twice, the placement rack 4 is pushed to the corresponding track 51 outside the kiln, and the placement rack 4 moves a distance along the corresponding track 51 outside the kiln, so that the kiln pushing mechanism 3 outside the kiln pushes the placement rack 4 into the tunnel kiln 5.

[0055] Reference Figure 1 , Fig.11 and Fig.12 The kiln outer pushing mechanism 3 includes a blocking rod assembly 31 and a second driving assembly 32. A third support plate 33 is fixed on the outer ground 6 of the tunnel kiln 5. Two second slide rails 331 are fixed on the third support plate 33. A fourth support plate 34 is arranged above the second slide rail 331. Two second sliders 341 are fixed below the fourth support plate 34. The second sliders 341 are slidably connected with the second slide rail 331. The second driving assembly 32 can drive the fourth support plate 34 to slide along the length direction of the second slide rail 331. The structure of the second driving assembly 32 is the same as that of the first driving assembly 23.

[0056] The blocking rod assembly 31 includes a mounting plate 311 and a blocking rod 312. A second rotating shaft 313 is fixed to the bottom of the blocking rod 312. The second rotating shaft 313 is rotatably connected to the mounting plate 311. The second rotating shaft 313 passes through the mounting plate 311. A driving member 314 for driving the second rotating shaft 313 to rotate is installed on the fourth supporting plate 34. The driving member 314 includes a third sprocket 3141, a fourth sprocket 3142 and a third motor 3144. The third sprocket 3141 is fixed to the second rotating shaft 313. The third sprocket 3141 and the fourth sprocket 3142 are connected through a second chain 3143. The third motor 3144 drives the fourth sprocket 3142 to rotate, thereby driving the second rotating shaft 313 and the blocking rod 312 to rotate. A second connecting plate is fixed to the side wall of the blocking rod 312 . A tension spring 315 is provided between the second connecting plate and the fourth supporting plate 34 . One end of the tension spring 315 is hooked on the second connecting plate, and the other end of the tension spring 315 is hooked on the fourth supporting plate 34 .

[0057] When the baffle rod 312 is in a vertical state, the tension spring 315 is in a normal state, neither stretched nor compressed. When it is necessary to push the placement rack 4 into the tunnel kiln 5, the second drive assembly 32 drives the baffle rod 312 to move to the end of the placement rack 4 away from the tunnel kiln 5, and the third motor 3144 drives the baffle rod 312 to rotate 90 degrees to one side of the placement rack 4, and the baffle rod 312 is in a horizontal state. The baffle rod 312 can contact the placement rack 4, and the tension spring 315 is stretched. The purpose of setting the tension spring 315 is to slow down the vibration of the baffle rod 312 when the baffle rod 312 rotates, so that the baffle rod 312 rotates smoothly, and the stability of the baffle rod 312 is increased. After waiting for a certain period of time, after the discharge port of the tunnel kiln 5 delivers a placement rack 4, the second drive assembly 32 drives the baffle rod 312 to move in the direction of the tunnel kiln 5, and pushes the placement rack 4 into the tunnel kiln 5.

[0058] Reference Figure 1 and Fig.13 A fourth installation groove 7 is provided on the ground at the kiln tail of the tunnel kiln 5, two fourth rails 71 arranged in parallel are fixed in the fourth installation groove 7, a second conveyor 72 is arranged on the fourth rail 71, and two fifth rails 721 arranged in parallel are fixed on the bottom plate of the second conveyor 71. The kiln tail position of each tunnel kiln 5 corresponds to a tractor 8, and a tractor rail 81 for the tractor 8 to move is installed on the ground 6, and the tractor rail 81 is aligned with the kiln tail rail. The fourth installation groove 7 is located between the kiln tail of the tunnel kiln 5 and the tractor 8. Automatic door opening and closing devices are provided at the kiln head and the kiln tail of the tunnel kiln 5.

[0059] After the grinding wheel is cured at high temperature in the tunnel kiln 5, the second conveyor 72 moves to the corresponding kiln tail position, aligning the fifth track 721 with the kiln tail track and the tractor track 81. Then the tractor enters the tunnel kiln 5, pulls the placement rack 4 out of the tunnel kiln 5, and transports the placement rack 4 to the second conveyor 72. The second conveyor 72 transports the placement rack 4 to a certain position.

[0060] The implementation principle of the automatic vehicle entry and exit system of a tunnel kiln of the utility model is as follows: when the placement rack 4 in the placement mechanism 1 is transported to the tunnel kiln 5, first, the first transport vehicle 21 is moved to the corresponding first track 11 position, so that the third track 211 on the first transport vehicle 21 is aligned with the first track 11, and then the first motor 124 drives the first chain 123 to rotate, the first chain 123 drives the first push plate 125 to move, and the first push plate 125 pushes the multiple placement racks 4 to move in the direction of the first transport vehicle 21.

[0061] The placement rack 4 closest to the first conveyor 21 is pushed onto the first conveyor 21. Thereafter, the first conveyor 21 transports the placement rack 4. The first conveyor 21 moves along the length direction of the second track 631. The first conveyor 21 moves to the position of the corresponding track 51 outside the tunnel kiln 5, so that the corresponding track 51 outside the kiln is aligned with the third track 211.

[0062] Afterwards, the first driving component 23 drives the second push plate 223 to move in the direction of the tunnel kiln 5, and the second push plate 223 and the push block 2231 push the placement rack 4 to move in the direction of the tunnel kiln 5. When the second support plate 214 moves to the middle position in the length direction of the rack 231, the first driving component 23 drives the second support plate 214 to move in the opposite direction, and the second support plate 214 returns to the initial position. Then, the electromagnet is powered off, and the electromagnet is separated from the iron plate 2232. Under the action of the second push plate 223's own gravity and the thrust of the spring 2252, the second push plate 223 rotates 90 degrees, and the second driving component 32 continues to drive the second support plate 214 to move in the direction of the tunnel kiln 5, so that the top end of the second push plate 223 contacts the placement rack 4, and the placement rack 4 is pushed to the corresponding track 51 outside the kiln.

[0063] After waiting for a while, when the frontmost placement rack 4 in the tunnel kiln 5 is transported out from the discharge port of the tunnel kiln 5, the placement rack 4 on the corresponding track 51 outside the kiln is pushed into the tunnel kiln 5 through the second driving assembly 32 and the blocking rod 312 assembly 31.

[0064] The placement rack is automatically transported by the placement mechanism, conveying mechanism, and kiln push mechanism outside the tunnel kiln, which reduces the labor intensity of the staff and improves the work efficiency. The placement rack is automatically transported by this system, and the time can be controlled, making it easier to control the heating time of the grinding wheel inside the tunnel kiln.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. An automatic feeding system for a tunnel kiln, characterized in that: The invention comprises a tunnel kiln (5) arranged on the ground (6), a kiln-outside corresponding track (51) being arranged on the ground (6) at the feed port position of the tunnel kiln (5), a placement mechanism (1) being arranged on one side of the tunnel kiln (5), the placement mechanism (1) comprising a first track (11) and a first pushing assembly (12) being installed on the ground (6), the length direction of the first track (11) being arranged parallel to the length direction of the tunnel kiln (5), a plurality of placement racks (4) for holding materials being arranged on the first track (11), the first pushing assembly (12) being capable of pushing the placement racks (4) onto a conveying mechanism (2), a conveying mechanism (2) being arranged on the ground (6) for conveying the placement racks (4) onto the kiln-outside corresponding track (51), and a kiln-outside pushing mechanism (3) being arranged outside the tunnel kiln (5) for pushing the placement racks (4) on the kiln-outside corresponding track (51) into the tunnel kiln (5).

2. The automatic feeding system for a tunnel kiln according to claim 1, characterized in that: The placement mechanism (1) further comprises a limiting assembly (13), the limiting assembly (13) comprising an oil cylinder (131) and a supporting limiting plate (132), a second mounting groove (62) being provided on the ground (6), the oil cylinder (131) being fixed to the bottom of the second mounting groove (62), two supporting limiting plates (132) being respectively arranged on both sides of the top of the second mounting groove (62), the supporting limiting plate (132) comprising a supporting bottom plate (1321) and a limiting plate (1322) being arranged vertically and fixed, the supporting bottom plate (1321) being fixed to the ground (6), a first connecting plate (133) being arranged above the supporting bottom plate (1321), first fixing plates (134) being fixed to both sides of the first connecting plate (133), a movable plate (135) being arranged between the two first fixing plates (134), one end of the movable plate (135) being connected to the first fixing plate (134) 134), a driving shaft (1352) is fixed to the other end of the movable plate (135), a waist-shaped hole (1341) for the driving shaft (1352) to slide is opened on the first fixed plate (134), the top surface of the limiting plate (1322) is an inclined surface, the top surface of the limiting plate (1322) is lower than the side close to the oil cylinder (131), the end of the driving shaft (1352) extends out of the waist-shaped hole (1341) and rests on the inclined surface, the piston rod of the oil cylinder (131) is fixed to the bottom of the first connecting plate (133), the bottom of the placement frame (4) is connected to the connecting shaft (41), and both ends of the connecting shaft (41) are installed with first rollers (43) sliding on the first track (11), when the piston rod of the oil cylinder (131) is extended, the end of the movable plate (135) away from the oil cylinder (131) moves upward and is equal to the height of the connecting shaft (41).

3. The automatic feeding system for a tunnel kiln according to claim 1 or 2, characterized in that: A first mounting groove (61) is provided on the ground (6), and the first pushing assembly (12) comprises a first sprocket (121) and a second sprocket (122) installed in the first mounting groove (61); the first sprocket (121) and the second sprocket (122) are connected via a first chain (123); a first motor (124) for driving the second sprocket (122) to rotate is provided in the first mounting groove (61), and a first pushing plate (125) for driving the placement rack (4) to move toward the conveying mechanism (2) is fixed on the first chain (123).

4. The automatic feeding system for a tunnel kiln according to claim 1, characterized in that: The conveying mechanism (2) comprises a first conveying vehicle (21) and a second track (631). A third mounting groove (63) is provided on the ground (6). Two second tracks (631) are arranged in parallel in the third mounting groove (63). The first conveying vehicle (21) is movable along the length direction of the second tracks (631). Two third tracks (211) arranged in parallel are fixed on the bottom plate of the first conveying vehicle (21). The height of the third tracks (211) is the same as that of the first tracks (11). A first support plate (213) is fixed on the side of the bottom plate of the first conveying vehicle (21) away from the first tracks (11). Two parallel first slide rails (212) are fixed on the bottom plate of the first conveying vehicle (21), the length direction of the first slide rails (212) is parallel to the length direction of the third rail (211), the first slide rails (212) extend onto the first support plate (213), and a second support plate (214) is slidably connected above the first slide rails (212); the conveying mechanism (2) further comprises a second pushing assembly (22) and a first driving assembly (23) for driving the second support plate (214) to slide, and the second pushing assembly (22) comprises a second pushing plate (223) mounted on the second support plate (214).

5. The automatic feeding system for a tunnel kiln according to claim 4, characterized in that: The second pushing assembly (22) further comprises a U-shaped plate (222), two second fixing plates (221) arranged in parallel are fixed on the first supporting plate (213), the U-shaped plate (222) is located between the two second fixing plates (221), two second pushing plates (223) are provided, one of the second pushing plates (223) is located between the U-shaped plate (222) and one of the second fixing plates (221), the other second pushing plate (223) is located between the U-shaped plate (222) and the other second fixing plate (221), and the first rotating shaft (22) is fixed on the U-shaped plate (222). 4), the second push plate (223) is rotatably connected to the first rotating shaft (224), an iron plate (2232) is fixed on the side wall of one of the second push plates (223), an electromagnet (225) for adsorbing and fixing the iron plate (2232) is installed on the top of the U-shaped plate (222), a semicircular return groove (2211) is opened on the second fixed plate (221), a return rod (2233) is fixed on the second push plate (223), the return rod (2233) is located directly below the first rotating shaft (224), and the return rod (2233) is located in the return groove (2211); When the electromagnet (225) is powered off, the second push plate (223) rotates along the rotating shaft toward one side of the placement frame (4). When the second push plate (223) rotates, the first drive assembly (23) drives the second support plate (214) to move toward the direction of the tunnel kiln (5), and the return rod (2233) escapes from the top of the return groove (2211). A limit block (2222) for limiting the second push plate (223) is fixed on the side wall of the U-shaped plate (222). When the second push plate (223) is rotated 90 degrees and is in a horizontal state, the limit block (2222) limits the second push plate (223) to prevent the second push plate (223) from continuing to rotate. When the first driving assembly (23) drives the second support plate (214) to move in a direction away from the tunnel kiln (5), the return rod (2233) first contacts the top arc of the return groove (2211), and as the second support plate (214) moves, the return rod (2233) slides along the arc direction of the return groove (2211), thereby causing the second push plate (223) to rotate along the first rotating shaft (224), and the second push plate (223) rotates from a horizontal state to a vertical state.

6. The automatic feeding system for a tunnel kiln according to claim 5, characterized in that: A first mounting rod (2221) is fixed to the top of the U-shaped plate (222); a second mounting rod (2251) is fixed to a side of the electromagnet (225) close to the first mounting rod (2221); the second mounting rod (2251) penetrates the first mounting rod (2221); a spring (2252) is fixed between the electromagnet (225) and the first mounting rod (2221); the spring (2252) is sleeved with the second mounting rod (2251).

7. The automatic feeding system for a tunnel kiln according to claim 4, characterized in that: The first driving assembly (23) comprises a gear (232), a rack (231) and a second motor (233); the rack (231) is fixed on a bottom plate of the first transport vehicle (21); the rack (231) is located between two first slide rails (212); the gear (232) meshes with the rack (231); the gear (232) is located below the second support plate (214); the second motor (233) is fixed on the second support plate (214); and the output shaft of the second motor (233) is fixed to the gear (232).

8. The automatic feeding system for a tunnel kiln according to claim 1, characterized in that: A third support plate (33) is fixed on the ground (6) outside the tunnel kiln (5). The third support plate (33) is located on one side of the corresponding track (51) outside the kiln. Two second slide rails (331) are fixed on the third support plate (33). A fourth support plate (34) is slidably arranged above the second slide rails (331). The kiln external pushing mechanism (3) comprises a blocking rod assembly (31) and a second driving assembly (32) for driving the fourth support plate (34) to slide along the second slide rails (331). The blocking rod assembly (31) comprises a mounting plate (311) and a blocking rod (312). The mounting plate (311) is fixed on the fourth support plate (34). The bottom of the blocking rod (312) is rotatably connected to the mounting plate (311). The fourth support plate (34) is provided with a driving member (314) for driving the blocking rod (312) to rotate.

9. The automatic feeding system for a tunnel kiln according to claim 8, characterized in that: The driving member (314) comprises a third sprocket (3141), a fourth sprocket (3142) and a third motor (3144); the third sprocket (3141) is fixed to the second rotating shaft (313); the third sprocket (3141) and the fourth sprocket (3142) are connected via a second chain (3143); and the third motor (3144) is fixed to the fourth supporting plate (34) and drives the fourth sprocket (3142) to rotate.

10. The automatic feeding system for a tunnel kiln according to claim 8 or 9, characterized in that: A tension spring (315) is connected between the side wall of the blocking rod (312) and the fourth supporting plate (34).

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