Multi-layer lifting conveying device and energy-saving oven with the conveying device

Abstract

A multi-layer lifting and conveying device and an energy-saving oven incorporating the device are disclosed. The device includes a frame, a casing located outside the frame, and a feeding device, a positioning device, a lifting conveyor, a dropping conveyor, a pushing device, and a ventilation device installed within the casing. The positioning device positions the products on the feeding device. The feeding device then feeds the products onto the lifting conveyor, which gradually raises multiple products. The pushing device pushes the topmost circuit board to the top layer of the dropping conveyor, which then lowers the pushed products back onto the feeding device for delivery. This invention, by incorporating a multi-layer lifting and conveying device, significantly improves the working efficiency and reduces the space occupied by the conveying device; it also achieves full and effective utilization of heat. It is highly practical and has significant potential for widespread application.

Description

Technical Field

[0001] The invention relates to a feeding device and an oven with the feeding device, and in particular to a multi-layer lifting conveying device and an energy-saving oven with the conveying device. Background Art

[0002] In the current SMT industry, after the welding of general electronic products (PCB boards) is completed, the durability of electronic products will be improved by dispensing glue, coating three-conformal paint, etc., and the electronic products will reach a higher level of protection. In the above process, the electronic products (PCB boards) need to be baked to solidify the glue.

[0003] At present, factories generally use offline ovens or horizontal transport ovens (online ovens). Offline ovens require manual opening of the furnace to put in or take out electronic products, and repeated opening and closing of the furnace is not conducive to maintaining a stable temperature in the furnace. Special operators are required, which has low work efficiency and is not suitable for large-scale production and processing. Horizontal transport ovens achieve automated production, but the equipment is often very long, and the spatial location is greatly restricted. In addition, the heating device must be arranged in such a long equipment, which does not fully utilize the heat energy. Summary of the invention

[0004] Based on this, the main purpose of the present invention is to provide a multi-layer lifting and conveying device and an energy-saving oven with the conveying device to solve the problems of low working efficiency, large space occupation and insufficient utilization of thermal energy of traditional ovens.

[0005] In order to achieve the above-mentioned object, the present invention provides a multi-layer lifting and conveying device and an energy-saving oven having the conveying device;

[0006] A multi-layer lifting and conveying device, which includes a lifting and conveying device, a blanking and conveying device and a pushing device, the lifting and conveying device and the blanking and conveying device are horizontally arranged side by side; the lifting and conveying device and the blanking and conveying device both include a worm, a worm driving device and two parallel and spaced-apart diaphragm racks, the worm is provided with a first transmission gear group and a second transmission gear group, the teeth on the first transmission gear group and the second transmission gear group are distributed in an eight-shaped shape from the lifting and conveying device to the blanking and conveying device; the two diaphragm racks are meshed with the worm through gears, the worm driving device is installed on the worm, and the worm driving device drives the worm to rotate; the diaphragm rack includes a driving sprocket, a transmission sprocket, a chain belt composed of a plurality of chain plates and a plurality of bearing plates, the driving sprocket and the transmission sprocket are arranged relatively to each other up and down, and the chain belt sleeve is On the driving sprocket and the transmission sprocket, the supporting plate is installed on the corresponding chain plate; the pushing device is installed above the lifting and conveying device, and the pushing device includes a bracket, a transmission chain vertically installed on the bracket and a plurality of pushing plates installed on the transmission chain, and the part of the transmission chain arranged below the bracket is arranged horizontally; the worm driving device drives the worm to rotate, and the worm drives the two thousand-layer racks of the lifting and conveying device to rotate in the opposite direction, and the workpieces are mounted on the same layer of supporting plates adjacent to the two thousand-layer racks; the same layer of supporting plates adjacent to the two thousand-layer racks rise at the same time; the transmission chain of the pushing device rotates the pushing plate from top to bottom on one side of the lifting and conveying device, and the pushing plate pushes the workpiece at the top of the lifting and conveying device to the blanking conveying device, and the supporting plate of the blanking conveying device then drives the workpiece to gradually descend.

[0007] Furthermore, it also includes a feeding device, which is arranged between the two thousand-layer frames of the lifting and conveying device and the falling and conveying device.

[0008] Furthermore, the feeding device is provided with a plurality of pushing blocks, and the pushing blocks are higher than the upper surface of the feeding device.

[0009] Furthermore, it also includes a positioning device, which includes a positioning drive and two positioning plates. The two positioning plates are respectively arranged on both sides of the feeding device, and the positioning drive drives the two positioning plates to move towards each other or away from each other.

[0010] Furthermore, the alignment device also includes a driving wheel, a transmission wheel, a belt mounted on the driving wheel and the transmission wheel, and a mounting frame, the mounting frame is provided with two sliding rods arranged side by side, and two alignment plates are movably mounted on the two sliding rods and the belts on the corresponding sides.

[0011] Furthermore, a clamping portion is provided at the bottom of the alignment plate, and the clamping portions of the two alignment plates are respectively clamped on the belts on both sides of the driving wheel; the alignment drive drives the belt to rotate, and the belt drives the two alignment plates to move towards each other or away from each other.

[0012] Furthermore, it also includes a centering plate arrangement device, which includes a programmable motor, a centering transmission device connected to the programmable motor, and two oppositely arranged centering execution devices installed on the centering transmission device.

[0013] Furthermore, the centering transmission device includes two centering transmission gears and a centering transmission chain mounted on the two centering transmission gears, and the centering actuator includes a mounting seat and a centering plate arranged above the mounting seat, and the mounting seats on the two centering actuators are respectively mounted on the centering transmission chains on both sides of the centering transmission gears.

[0014] An energy-saving oven with a multi-layer lifting and conveying device comprises a frame, a casing mounted on the frame, a feeding device and the multi-layer lifting and conveying device mounted in the casing; a feed port and a discharge port are provided between the casing and the frame, the feed port and the discharge port are respectively arranged on two opposite sides of the casing, and the feeding device extends from the feed port to the discharge port. The multi-layer lifting and conveying device comprises a lifting and conveying device, a blanking and conveying device and a pushing device, the lifting and conveying device and the blanking and conveying device are arranged horizontally side by side; the lifting and conveying device and the blanking and conveying device both comprise a worm, a worm driving device and two parallel and spaced-apart diaphragm racks, the worm is provided with a first transmission gear group and a second transmission gear group, the teeth on the first transmission gear group and the second transmission gear group are distributed in an eight-shaped shape from the lifting and conveying device to the blanking and conveying device; the two diaphragm racks are both engaged with the worm through gears, the worm driving device is installed on the worm, and the worm driving device drives the worm to rotate; the diaphragm rack comprises a driving sprocket, a transmission sprocket, a chain belt composed of a plurality of chain plates and a plurality of bearing plates, the driving sprocket and the transmission sprocket are arranged relatively to each other up and down, and the chain belt sleeve is On the driving sprocket and the transmission sprocket, the supporting plate is installed on the corresponding chain plate; the pushing device is installed above the lifting and conveying device, and the pushing device includes a bracket, a transmission chain vertically installed on the bracket and a plurality of pushing plates installed on the transmission chain, and the part of the transmission chain arranged below the bracket is arranged horizontally; the worm driving device drives the worm to rotate, and the worm drives the two thousand-layer racks of the lifting and conveying device to rotate in the opposite direction, and the workpieces are mounted on the same layer of supporting plates adjacent to the two thousand-layer racks; the same layer of supporting plates adjacent to the two thousand-layer racks rise at the same time; the transmission chain of the pushing device rotates the pushing plate from top to bottom on one side of the lifting and conveying device, and the pushing plate pushes the workpiece at the top of the lifting and conveying device to the blanking conveying device, and the supporting plate of the blanking conveying device then drives the workpiece to gradually descend.

[0015] Furthermore, it also includes a feeding device, which is arranged between the two thousand-layer frames of the lifting and conveying device and the falling and conveying device.

[0016] Furthermore, the feeding device is provided with a plurality of pushing blocks, and the pushing blocks are higher than the upper surface of the feeding device.

[0017] Furthermore, it also includes a positioning device, which includes a positioning drive and two positioning plates. The two positioning plates are respectively arranged on both sides of the feeding device, and the positioning drive drives the two positioning plates to move towards each other or away from each other.

[0018] Furthermore, the alignment device also includes a driving wheel, a transmission wheel, a belt mounted on the driving wheel and the transmission wheel, and a mounting frame, the mounting frame is provided with two sliding rods arranged side by side, and two alignment plates are movably mounted on the two sliding rods and the belts on the corresponding sides.

[0019] Furthermore, a clamping portion is provided at the bottom of the alignment plate, and the clamping portions of the two alignment plates are respectively clamped on the belts on both sides of the driving wheel; the alignment drive drives the belt to rotate, and the belt drives the two alignment plates to move towards each other or away from each other.

[0020] Furthermore, it also includes an air conveying device arranged on the inner side of the top of the frame, and the air conveying device includes a shell and a blowing device and a heating device installed in the shell.

[0021] Furthermore, the blowing device includes a driving motor and a fan mounted on the motor, the fan is provided with an outer cavity outside, the outer cavity is provided with an air inlet and an air outlet, the air inlet is arranged at the bottom of the outer cavity, and the air outlet is arranged on one side of the outer cavity.

[0022] Furthermore, waste pipes are provided on the casing at the feed inlet and the discharge outlet.

[0023] Furthermore, it also includes a centering plate arrangement device, which includes a programmable motor, a centering transmission device connected to the programmable motor, and two oppositely arranged centering execution devices installed on the centering transmission device.

[0024] Furthermore, the centering transmission device includes two centering transmission gears and a centering transmission chain mounted on the two centering transmission gears, and the centering actuator includes a mounting seat and a centering plate arranged above the mounting seat, and the mounting seats on the two centering actuators are respectively mounted on the centering transmission chains on both sides of the centering transmission gears.

[0025] In summary, the present invention greatly improves the working efficiency and occupied space of the conveying device by setting a multi-layer lifting conveying device; and realizes full and effective utilization of heat. In addition, the rotating blowing setting of the air conveying device and the assembly setting of the bearing plate using rods greatly improve the heat circulation utilization rate. The present invention is highly practical and has a strong promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of an energy-saving oven with a multi-layer lifting and conveying device according to the present invention;

[0027] Figure 2 for Figure 1 The schematic diagram of the structure of the energy-saving oven after the casing is removed, wherein the air conveying device and the outer part of the chain plate are not shown;

[0028] Figure 3 for Figure 2 A schematic diagram of the structure of the CEC oven from another perspective;

[0029] Figure 4 for Figure 3 Structural diagram of the feeding device and the calibration device;

[0030] Figure 5 for Figure 4 Schematic diagram of the installation structure of the feeding device and the calibration device in the middle feeding section;

[0031] Figure 6 for Figure 5 Schematic diagram of the structure of the center position device;

[0032] Figure 7 for Figure 3 Structural diagram of the lifting material conveying device and the falling material conveying device,

[0033] Figure 8 for Figure 7 A schematic diagram of the side structure of

[0034] Fig. 9 for Figure 8 Schematic diagram of the internal structure;

[0035] Fig.10 for Figure 3 A schematic diagram of the enlarged structure of the part marked with a circle in the middle;

[0036] Fig.11 for Figure 7 Structural schematic diagram of the middle pusher device;

[0037] Fig.12 for Fig. 9 A schematic diagram of the structure of the centrally centered plate arrangement device;

[0038] Fig.13 for Fig.12 A schematic diagram of the structure of the central execution device;

[0039] Fig.14 for Figure 1 A schematic diagram of the wind direction of the medium wind transport device;

[0040] Fig.15 for Figure 1 Schematic diagram of the structure of the medium wind transport device;

[0041] Fig.16 for Fig.15Exploded diagram of the mid-air transport device;

[0042] Fig.17 for Fig.16 Schematic diagram of the structure of the middle and outer cavities. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] like Figures 1 to 17 As shown, it is an energy-saving oven with a multi-layer lifting and conveying device provided by the present invention, which is used for baking circuit boards 100 or any other products that need to be baked. The energy-saving oven with a multi-layer lifting and conveying device comprises a frame 10, a casing 20 arranged outside the frame 10, and a feeding device 30, a positioning device 40, a lifting and conveying device 50, a blanking and conveying device 60, a pushing device 70, an air conveying device 80, and a centering plate arrangement device 90 installed in the casing 20.

[0045] The housing 20 is mounted on the frame 10, and a feed port 11 and a discharge port 12 are provided between the housing 20 and the frame 10. The feed port 11 and the discharge port 12 are respectively provided on two opposite sides of the housing 20, and the feeding device 30 extends from the feed port 11 to the discharge port 12. The lifting and conveying device 50 and the blanking and conveying device 60 are arranged side by side directly above the feeding device 30, and the lifting and conveying device 50 is arranged on one side of the feed port 11, and the blanking and conveying device 60 is arranged on one side of the discharge port. The calibration device 40 is arranged on the feeding device 30 at the feed port 11, and the feeding device 30 delivers the circuit board 100 to the bottom layer of the lifting and conveying device 50, and the lifting and conveying device 60 drives the circuit board 100 to rise to the top layer. The pushing device 70 is arranged on the top of the lifting and conveying device 60. The pushing device 60 pushes the circuit board 100 at the top of the lifting and conveying device 60 to the top of the blanking and conveying device 60. The blanking and conveying device 60 drives the circuit board 100 to move downward until the circuit board 60 is moved onto the feeding device 30. The feeding device 30 delivers the circuit board 100 from the discharge port 12.

[0046] The feeding device 30 is also provided with a plurality of pusher blocks 31. In this embodiment, the pusher blocks 31 are higher than the upper surface of the feeding device 30. The pusher blocks 31 move forward with the feeding device 30 and simultaneously push the circuit board 100 onto the lifting and conveying device 50. The feeding device 30 is also provided with a sensing device (not shown) at the feed port 11. When the sensing device senses the presence of a circuit board, it transmits a signal to the calibration device 40. The calibration device 40 moves inward from both sides to quickly calibrate the circuit board 100.

[0047] The alignment device 40 includes an alignment drive 41, a driving wheel 42, a transmission wheel 43, a belt 44 sleeved on the driving wheel 42 and the transmission wheel 43, a mounting frame 45 and two alignment plates 46. The mounting frame 45 is provided with two slide bars 47 arranged side by side. The two alignment plates 46 are movably mounted on the two slide bars 47 and can move toward each other along the slide bars 47. A clamping portion 48 is provided at the bottom of each alignment plate 46. The two clamping portions 48 are respectively clamped on the belt 44 on both sides of the driving wheel 42. The alignment drive 41 drives the belt 44 to rotate 44, and the belt 44 drives the two alignment plates 46 to approach each other to align and center the circuit board 100. After the alignment is completed, the two alignment plates 46 move away from each other in the opposite direction.

[0048] The lifting and conveying device 50 includes a driving wheel 51, a worm 52, a worm driving device 53, and two layer racks 54 arranged side by side and spaced apart. The two layer racks 54 are meshed with the worm 52 through gears, and the driving wheel 51 is installed at one end of the worm 52. The worm driving device 53 is connected to the driving wheel 51 through a transmission belt and drives the worm 52 to rotate, and the worm 52 drives the layer racks 54 to move up and down. In addition, the feeding device 30 is arranged between the two layer racks 54.

[0049] The lasagna rack 54 includes two outer covers 541, a plurality of bearing plates 542, a sprocket device and a guide device. The sprocket device includes a driving sprocket 543, a transmission sprocket 544 and a chain belt 546 composed of a plurality of chain plates 545. The driving sprocket 543 and the transmission sprocket 544 are arranged opposite to each other up and down, and the chain belt 546 is sleeved on the two sprockets. Each of the bearing plates 542 is mounted on a corresponding chain plate 545. In this embodiment, the bearing plates 542 are formed by a plurality of support rods, so that they are not only light in weight, convenient for transmission, but also convenient for the flow of heat. In addition, a worm wheel 547 is also arranged on the outer side of the transmission sprocket 544, and the worm wheel 547 is connected to the worm 52.

[0050] The worm 52 is provided with two transmission gear sets 521, and the teeth of the two transmission gear sets 521 are inclined and extend toward the outside; specifically, the direction of the teeth on the two transmission gear sets 521 on one side of the lifting and conveying device 50 is arranged in a right figure eight shape when viewed from the outside to the inside. The direction of the teeth on the two transmission gear sets 521 on one side of the blanking conveying device 50 is arranged in an inverted figure eight shape when viewed from the outside to the inside. The worm wheels 547 outside the two thousand-layer racks 54 are respectively meshed with the corresponding transmission gear sets 521, so that the reverse rotations of the chain belts 546 on the thousand-layer racks 54 driven by different transmission gear sets 521 on the same worm 52 are the same. In this embodiment, the chain belts 546 of the two thousand-layer racks 54 driven by the worm 52 on the lifting and conveying device 50 are all rotated from the outside to the inside, so that the carrier plate 542 between the two thousand-layer racks 54 can rise at the same time to lift the circuit board 100. The adjacent carrier plates 542 on the two layer racks 54 of the blanking conveying device 50 are simultaneously lowered to transfer the circuit board 100 to the feeding device 50 .

[0051] The guide device includes a plurality of guide plates 548 and a plurality of limit plates 549, which are both mounted on the back of the chain plate 545, and the limit plates 549 are respectively arranged at both ends of the extension direction of the chain plate 545. The guide plates 548 extend along the width direction of the chain plate, and a plurality of limit plates 549 are arranged at intervals on the same chain plate 545. The distance between the guide plate 548 and the top surface of the next adjacent guide plate 548 is gradually reduced from the free end of the guide plate 548 to the inner side end, so as to facilitate the guiding of the circuit board 100. In addition, the structure of the blanking conveying device 60 is basically the same as that of the lifting conveying device 50, and the only difference is that the bearing plates 542 between the two thousand-layer racks 54 of the blanking conveying device 60 move downward at the same time. Therefore, its specific structure will not be described in detail.

[0052] The pushing device 70 is arranged between the two 1000-layer racks 54 of the lifting and conveying device 50, and includes a bracket 71, a transmission chain 72, and a plurality of pushing plates 73 mounted on the transmission chain 72. The bracket 71 is provided with a first mounting portion 74 and a second mounting portion 75. The first mounting portion 74 is provided with a first transmission wheel 76, and the second mounting portion 75 is provided with a second transmission wheel 77. The first mounting portion 74 and the second mounting portion 75 are respectively mounted on the front and rear ends of the 1000-layer rack 54. The transmission chain 72 is sleeved on the first transmission wheel 76 and the second transmission wheel 77, and the extension direction of the transmission chain 72 is consistent with the arrangement direction of the lifting and conveying device 50 and the blanking and conveying device 60. The transmission chain 72 drives the pushing plate 73 to rotate from top to bottom on the side of the feed port 11 to the outside of the topmost circuit board 100 of the lifting and conveying device 50, and then pushes the circuit board 100 to move toward the side of the blanking and conveying device 60.

[0053] The housing 20 includes an outer shell 21 and an inner shell 22 disposed in the outer shell 21, the air moving device 80 is disposed between the inner shell 22 and the outer shell 21, and the lifting and conveying device 50, the blanking and conveying device 60, the pushing device 70, the centering plate arrangement device 90 and part of the feeding device 30 are all disposed in the inner shell 22. A plurality of air holes 221 are disposed on the side wall of the inner shell 22, and the hot air blown out by the air moving device 80 flows downward along the side wall and enters the inner shell 22 through the air holes 221 to heat and dry the circuit board in the inner shell 22, and then is discharged from the air holes 221 on the other side wall and sucked into the air moving device 80 to be heated again and then blown out, and the cycle repeats.

[0054] In this embodiment, the number of the air conveying device 80 is set to two, and the air conveying device 80 includes a shell 81 and a blowing device 82 and a heating device 83 installed in the shell 81. The blowing device 82 includes a driving motor 821 and a fan 822 installed under the motor 821. The heating device 83 includes a temperature-insulating base 831 and a heating component 832 installed on the temperature-insulating base 831. In this embodiment, the heating component 832 is composed of a heating tube, a heating wire and an insulating accessory. An outer cavity 823 is provided outside the fan 822, and the fan 822 is a turbine centrifugal fan. An air inlet (not shown) and an air outlet 811 are provided on the outer cavity 823. The air inlet 81 is arranged below the outer cavity 823, and the air outlet 811 is arranged on one side of the outer cavity 823. The heating device 83 combined with the blowing device 82 can realize indoor circulation blowing, so that the heat is fully diffused to various areas of the lycra rack 54. In addition, a row of exhaust pipes 84 is provided at each of the feed inlet 11 and the discharge outlet 11 .

[0055] The centered plate arrangement device 90 includes a programmable motor 91, a centered transmission device 92 and two centered actuators 93. The centered transmission device 92 is installed between the lifting conveyor device 50 and the blanking conveyor device 60. The centered transmission device 92 includes two centered transmission gears 921 and a centered transmission chain 922 mounted on the two centered transmission gears 921. The programmable motor 91 is mounted on one of the centered transmission chains 922 through a belt to drive the centered transmission chain 922 to rotate. The centering actuator 93 includes a mounting seat 931 and a centering plate 932 arranged above the mounting seat 931. The mounting seats 931 on the two centering actuators 93 are respectively installed on the centering transmission chains 922 on both sides of the centering transmission gear 921. Therefore, when the centering transmission gear 921 drives the centering transmission chain 922 to move, the two centering plates 932 will approach or move away from each other, thereby centering the circuit board 100 to avoid the problem of the circuit board 100 being deviated during blanking and conveying, resulting in the problem of the board falling.

[0056] During operation, the feeding device 30 conveys the circuit board 100. When the sensing device on the feeding device 30 senses the circuit board 100, the sensing device transmits a signal to the calibration device 40. The two calibration plates 46 driven by the calibration drive 41 move inward at the same time to calibrate the circuit board 100. After the calibration is completed, the two calibration plates 46 move away in the opposite direction. The circuit board 100 continues to move into the feed port 11. At the same time, the push plate 31 moves with the feeding device 30 and pushes the circuit board 100 forward to the two supporting plates on the same layer of the adjacent 1-layer rack 54 of the lifting and conveying device 50.

[0057] The worm drive device 53 drives the worm 52 to rotate, and the worm 52 drives the bearing plates 542 of the two thousand-layer racks 54 of the lifting and conveying device 50 to rise inward at the same time, lifting the circuit board 100 by one layer, and then pushing the next circuit board 100 on the feeding device 30 onto the bearing plates 542; repeating this process until the first circuit board 100 reaches the top of the lifting and conveying device 50. Then the pushing device 70 pushes the top circuit board 100 toward the top layer of the blanking and conveying device 60, and the centering and arranging device 90 arranges the circuit boards 100 in the center to avoid the circuit boards 100 entering the blanking and conveying device 60 from being deflected. The blanking and conveying device 60 then drives the circuit boards 100 to gradually descend, and when the first circuit board 100 reaches the feeding device 30, the two bearing plates 542 rotate away from the two sides of the feeding device 30 respectively, and the circuit board 100 falls on the feeding device 30 again, and the feeding device 30 delivers the circuit board 100 out again. Thus, the entire feeding process is that one circuit board enters from the feeding port 11, and another baked circuit board is fed out from the discharging port 12. The other circuit boards 100 are baked while being transported on the lifting conveyor 50 and the blanking conveyor 60; the transport time can be set according to the required baking time.

[0058] In summary, the present invention greatly improves the working efficiency and occupied space of the conveying device by setting a multi-layer lifting conveying device; and realizes full and effective utilization of heat. In addition, the rotating blowing setting of the air conveying device 80 and the assembly setting of the bearing plate 542 using rods greatly improve the heat circulation utilization rate. The present invention is highly practical and has a strong promotion significance.

[0059] The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A multi-layer lifting and conveying device, Features: The present invention relates to a material lifting and conveying device, a material dropping and conveying device and a material pushing device, wherein the material lifting and conveying device and the material dropping and conveying device are arranged horizontally side by side; the material lifting and conveying device and the material dropping and conveying device both comprise a worm, a worm driving device and two parallel and spaced-apart diaphragm racks, wherein the worm is provided with a first transmission gear group and a second transmission gear group, and the teeth on the first transmission gear group and the second transmission gear group are distributed in an eight-shaped shape from the material lifting and conveying device to the material dropping and conveying device; the two diaphragm racks are meshed with the worm through gears, and the worm driving device is installed on the worm, and the worm driving device drives the worm to rotate; the diaphragm rack comprises a driving sprocket, a transmission sprocket, a chain belt composed of a plurality of chain plates and a plurality of bearing plates, and the driving sprocket and the transmission sprocket are arranged relatively to each other up and down, and the chain belt is sleeved on the driving sprocket and The carrying plate is mounted on the corresponding chain plate on the transmission sprocket; the pushing device is mounted above the lifting and conveying device, and the pushing device includes a bracket, a transmission chain vertically mounted on the bracket and a plurality of pushing plates mounted on the transmission chain, and the part of the transmission chain arranged below the bracket is arranged horizontally; the worm drive device drives the worm to rotate, and the worm drives the two thousand-layer racks of the lifting and conveying device to rotate in the opposite direction, and the workpieces are mounted on the same layer of the carrying plates adjacent to the two thousand-layer racks; the same layer of the carrying plates adjacent to the two thousand-layer racks rise at the same time; the transmission chain of the pushing device rotates the pushing plate from top to bottom on one side of the lifting and conveying device, and the pushing plate pushes the workpiece at the top of the lifting and conveying device onto the blanking conveying device, and the carrying plate of the blanking conveying device then drives the workpiece to gradually descend; It also includes a feeding device, which is arranged between the two thousand-layer frames of the lifting and conveying device and the falling and conveying device; The feeding device is provided with a plurality of pushing blocks, and the pushing blocks are higher than the upper surface of the feeding device; It also includes a calibration device, which includes a calibration drive and two calibration plates. The two calibration plates are respectively arranged on both sides of the feeding device, and the calibration drive drives the two calibration plates to move toward each other or away from each other in the opposite direction; It also includes a centering plate arrangement device, which includes a programmable motor, a centering transmission device connected to the programmable motor, and two centering execution devices installed on the centering transmission device and arranged opposite to each other; The centering transmission device includes two centering transmission gears and a centering transmission chain mounted on the two centering transmission gears. The centering actuator includes a mounting seat and a centering plate arranged above the mounting seat. The mounting seats on the two centering actuators are respectively mounted on the centering transmission chains on both sides of the centering transmission gears.

2. An energy-saving oven with a multi-layer lifting and conveying device, Features: The multi-layer lifting and conveying device as claimed in claim 1 comprises a frame, a casing mounted on the frame, a feeding device and the casing mounted in the multi-layer lifting and conveying device; a feed port and a discharge port are provided between the casing and the frame, the feed port and the discharge port are respectively provided on two opposite sides of the casing, and the feeding device extends from the feed port to the discharge port.

3. The energy-saving oven with a multi-layer lifting and conveying device as claimed in claim 2, Features: It also includes an air conveying device arranged on the inner side of the top of the frame, and the air conveying device includes a shell and a blowing device and a heating device installed in the shell.

4. The energy-saving oven with a multi-layer lifting and conveying device as claimed in claim 3, Features: The blowing device includes a driving motor and a fan mounted on the motor. An outer cavity is provided outside the fan. An air inlet and an air outlet are provided on the outer cavity. The air inlet is arranged at the bottom of the outer cavity, and the air outlet is arranged on one side of the outer cavity.

5. The energy-saving oven with a multi-layer lifting and conveying device as claimed in claim 4, Features: The casing on the feed inlet and the discharge outlet is provided with a waste discharge pipe.

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