Chain plate type baking tunnel furnace based on thermal radiation heating

Abstract

The invention discloses a chain plate type baking tunnel furnace based on thermal radiation heating, and relates to the technical field of pastry baking, the chain plate type baking tunnel furnace comprises a chain plate conveyor used for conveying baking trays and a thermal radiation heating system, an upper baking box is fixed above a rack of the chain plate conveyor, and a lower baking box is fixed below the rack of the chain plate conveyor; a wire transferring mechanism is arranged at one end of the rack, and the wire transferring mechanism comprises a liftable tray; push-and-pull disc assemblies are fixed to a plurality of chain plates of the chain plate conveyor. Each push-and-pull disc assembly comprises a push plate fixed to the corresponding chain plate and two sets of symmetrically-distributed pull rods. A coil returning wire group arranged in the lower baking box is fixed below the rack; the baking tray moves in the upper baking box through conveying of the chain plate, and the baking tray is pushed to the tray through the push plate after reaching the conveying tail end of the chain plate conveyor; the problems that due to the fact that single-layer conveying needs a long baking line to meet the requirement for baking time, the occupied area of equipment is large, and the mechanical structure of a double-layer chain scraper conveyor is not simplified are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pastry baking, and particularly to a chain plate type baking tunnel furnace based on heat radiation heating. Background Art

[0002] A chain plate type baking tunnel furnace is an industrial equipment dedicated to the continuous baking of foods (such as pastries, breads, biscuits, etc.). Its core feature is to use a chain plate conveyor as a carrier to uniformly pass food raw materials through a heating zone in a closed tunnel structure and complete the baking process through precise temperature control.

[0003] Currently, the core contradiction faced by pastry baking tunnel furnaces in optimizing the conveying structure is: how to shorten the equipment length and simplify the mechanical structure while ensuring the baking efficiency. Combining the current technical situation in the industry, single-layer conveying requires a longer baking line to meet the baking duration requirements, resulting in a large floor area of the equipment; the double-layer chain plate conveyor method, where the upper layer is used for preheating and the lower layer is used for high-temperature shaping, can shorten the equipment length, but the mechanical structure of the equipment has not been effectively simplified. Summary of the Invention

[0004] The purpose of the present invention is to propose a chain plate type baking tunnel furnace based on heat radiation heating to solve the problems that single-layer conveying requires a longer baking line to meet the baking duration requirements, resulting in a large floor area of the equipment, and the mechanical structure of the double-layer chain plate conveyor has not been simplified.

[0005] To achieve the above purpose, the present invention adopts the following technical solution for a chain plate type baking tunnel furnace based on heat radiation heating: It includes a chain plate conveyor for conveying baking trays and a heat radiation heating system. An upper baking oven is fixed above the frame of the chain plate conveyor, and a lower baking oven is fixed below. A wire transfer mechanism is arranged at one end of the frame, and the wire transfer mechanism includes a liftable tray. Push-pull tray assemblies are fixed on multiple chain plates of the chain plate conveyor. The push-pull tray assembly includes a push plate fixed on the chain plate and two groups of symmetrically distributed pull rods. A tray return line group placed in the lower baking oven is fixed below the frame. The baking tray moves in the upper baking oven through the conveyance of the chain plate. After the baking tray reaches the end of the conveyance of the chain plate conveyor, it is pushed onto the tray by the push plate. The tray descends and corresponds to the tray return line group. The baking tray is pushed to the tray return line group through the wire transfer mechanism, and the pull rod rotating to the lower part pulls the baking tray to move in the lower baking oven along the trajectory of the tray return line group.

[0006] Further description of the chain plate baking tunnel furnace based on the above technology with heat radiation heating: The wire transfer mechanism further includes a first servo electric cylinder and a second servo electric cylinder perpendicular to the first servo electric cylinder. The first servo electric cylinder is vertically arranged, and the piston rod of the first servo electric cylinder is fixed to the tray through a hanging bracket. An inlet port for the tray is reserved on the side of the tray close to the chain plate, and a pushing port for the tray is reserved on the side away from the chain plate. The piston rod of the second servo electric cylinder is parallel and corresponding to the return tray line group. The return tray line group includes two symmetrically arranged sliding frames fixed in the lower baking oven by multiple legs. Baffles are fixedly installed on both sides of the baking tray. The pull rod includes a vertical rod fixed on the chain plate and a horizontal rod perpendicularly fixed to the vertical rod. The baffle is placed on the route of the horizontal rod rotated to the lower side.

[0007] Further description of the chain plate baking tunnel furnace based on the above technology with heat radiation heating: An arc-shaped plate with an opening facing the first servo electric cylinder is fixed to the upper end of the baffle.

[0008] Further description of the chain plate baking tunnel furnace based on the above technology with heat radiation heating: One end of the upper baking oven and the lower baking oven close to the wire transfer mechanism is fixed through a wire transfer box. The first servo electric cylinder and the second servo electric cylinder are both fixed on the wire transfer box.

[0009] Further description of the chain plate baking tunnel furnace based on the above technology with heat radiation heating: A plurality of strip-shaped holes are formed in the chain plates. The pushing plate is fixedly connected to the chain plate with strip-shaped holes through a plurality of hinges. The pull rod is fixed to the chain plate on one side of the strip-shaped hole, and the pull rod is placed behind the advancing direction of the pushing plate. The machine frame is fixed with a long straight plate through a plurality of cross braces. Arc-shaped side braces are tangentially fixed at both ends of the long straight plate. The side braces are coaxially arranged with the sprocket shaft of the chain plate conveyor. The long straight plate is placed below the chain plate in the upper area of the sprocket shaft.

[0010] Further description of the chain plate baking tunnel furnace based on the above technology with heat radiation heating: The machine frame is fixed with a slag recovery tray placed below the conveyor chain of the chain plate conveyor through a support frame. The lower pushing plate contacts the upper surface of the slag recovery tray.

[0011] Further description of the chain plate baking tunnel furnace based on the above technology with heat radiation heating: The slag recovery tray includes a large plate and a small plate. The small plate is placed at the input end of the chain plate conveyor. The distance between the two groups of pull rods is greater than the width of the large plate. An avoidance opening is formed between the large plate and the small plate.

[0012] As a further description of the chain plate baking tunnel furnace based on thermal radiation heating of the above technology: A scraper is fixed at one end of the upper surface of the large plate close to the small plate.

[0013] As a further description of the chain plate baking tunnel furnace based on thermal radiation heating of the above technology: A plurality of rib plates are fixed between the lower surface of the large plate and the support frame, and both ends of the large plate in the length direction are fixed by pulling ribs.

[0014] As a further description of the chain plate baking tunnel furnace based on thermal radiation heating of the above technology: A proximity switch is fixed on one side of the wire transfer box away from the chain plate, and the proximity switch corresponds to the baking tray on the chain plate.

[0015] In summary, due to the adoption of the chain plate baking tunnel furnace based on thermal radiation heating of the above technology, the beneficial effects of the present invention are as follows: 1. In this application, the baking tray is pushed onto the tray by the push plate of the push-pull tray assembly, and then the baking tray is transferred to the lower return tray line group through the wire transfer mechanism. During the movement of the lower pull rod following the chain plate, the pull rod drags the baking tray and the pastries inside for baking in the lower baking oven, which not only solves the problem that the traditional single-layer conveying requires a long baking line to meet the baking duration requirement, resulting in a large floor area of the equipment, but also effectively simplifies the overall conveying machinery.

[0016] 2. An arc-shaped plate with an opening facing the first servo electric cylinder is fixed at the upper end of the baffle. When the chain plate with the cross bar rotates clockwise around the sprocket shaft, under the action of the arc-shaped plate, the cross bar will first lift the right end of the baking tray upward through the arc-shaped plate. When the cross bar continues to rise and the contact position with the arc-shaped plate gradually approaches the arc top and separates from the arc top, the baking tray falls under the action of gravity and collides with the sliding frame. Under the vibration, the pastries in the baking tray that have been baked can be loosened, facilitating the demoulding of the pastries.

[0017] 3. The lower push plate is partially flipped into the strip-shaped hole through the hinge, causing the push plate to deflect, and its lower edge abuts against the upper surface of the slag recovery tray under the action of gravity. Therefore, when the lower push plate moves from left to right, the slag on the slag recovery tray can be cleaned by the push plate and cleaned to the right end of the chain plate conveyor, facilitating the centralized cleaning of the slag.

[0018] 4. A scraper is fixed at one end of the upper surface of the large plate close to the small plate. When the lower push plate passes through the scraper, the slag carried on the lower surface of the push plate is cleaned by the scraper at this time to ensure the cleanliness of the push plate and prevent the slag on the push plate from falling into the baking tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shows the overall structural schematic diagram provided by the embodiment of the present invention; Figure 2 Shows a schematic diagram of the overall side view structure provided according to an embodiment of the present invention; Figure 3 Shows a schematic diagram of the overall sectional structure provided according to an embodiment of the present invention; Figure 4 Shows the Figure 3 enlarged structure schematic diagram at position A provided according to an embodiment of the present invention; Figure 5 Shows a schematic diagram of the installation state structure of the push-pull disk assembly and the chain plate provided according to an embodiment of the present invention; Figure 6 Shows the Figure 5 partial front view structure schematic diagram provided according to an embodiment of the present invention; Figure 7 Shows a schematic diagram of the overall local state structure provided according to an embodiment of the present invention; Figure 8 Shows the Figure 7 enlarged structure schematic diagram at position B provided according to an embodiment of the present invention; Figure 9 Shows a schematic diagram of the return disk line group structure provided according to an embodiment of the present invention; Figure 10 Shows a schematic diagram of the long straight plate and the arc plate structure provided according to an embodiment of the present invention; Figure 11 Shows a schematic diagram of the slag recovery disk structure provided according to an embodiment of the present invention; Figure 12 Shows a schematic diagram of the bottom structure of the slag recovery disk provided according to an embodiment of the present invention; Figure 13 Shows a schematic diagram of the partial structure of the wire transfer mechanism provided according to an embodiment of the present invention; Figure 14 Shows a schematic diagram of the baking tray structure provided according to an embodiment of the present invention.

[0020] Legend: 10. Chain plate conveyor; 11. Chain plate; 111. Strip-shaped hole; 12. Frame; 13. Sprocket shaft; 20. Upper baking oven; 21. Exhaust pipe; 30. Lower baking oven; 31. Wire transfer box; 40. Thermal radiation heating system; 41. Heater; 50. Wire transfer mechanism; 51. First servo electric cylinder; 511. Guide rod; 52. Hanger; 53. Tray; 531. Push plate opening; 532. Disk inlet; 54. Proximity switch; 55. Second servo electric cylinder; 60. Return disk line group; 61. Slide carriage; 62. Leg; 70. Push-pull tray assembly; 71. Push plate; 711. Hinge; 72. Pull rod; 721. Vertical rod; 722. Cross rod; 73. Long straight plate; 74. Side support plate; 75. Cross brace rod; 80. Material slag recovery tray; 81. Large tray; 82. Small tray; 821. Avoidance opening; 83. Scraper; 84. Support frame; 841. Pulling rib; 842. Rib plate; 90. Baking tray; 91. Baffle; 92. Arc plate. Detailed implementation manners

[0021] Next, the technical aspects in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] As Figure 1 - Figure 14 shown, the chain plate baking tunnel furnace based on thermal radiation heating provided by the present invention includes a chain plate conveyor 10 for conveying the baking tray 90 and a thermal radiation heating system 40. Above the frame 12 of the chain plate conveyor 10, an upper baking oven 20 with open structures at both ends is fixed, and below it, a lower baking oven 30 with open structures at both ends is fixed. Both the upper baking oven 20 and the lower baking oven 30 are dried and heated by multiple heaters 41 of the thermal radiation heating system 40; At the left end of the frame 12 (that is, the conveying end of the chain plate conveyor 10), a wire transfer mechanism 50 is provided. The wire transfer mechanism 50 includes a liftable tray 53. The lift adjustment of the tray 53 can make it correspond to the upper chain plate 11 of the chain plate conveyor 10, so as to facilitate the transfer of the baking tray 90 above the chain plate 11 to the tray 53; Multiple chain plates 11 of the chain plate conveyor 10 are each fixed with a push-pull tray assembly 70. The push-pull tray assembly 70 includes push plates 71 fixed on the chain plate 11 and distributed at equal intervals and two groups of pull rods 72 symmetrically distributed at both ends of the chain plate 11. The area of the chain plate 11 between two adjacent upper push plates 71 is a placement area for one baking tray 90; Below the frame 12, a tray return line group 60 placed in the lower baking oven 30 is fixed. The tray return line group 60 is parallel to the conveying direction of the chain plate conveyor 10. The width of the baking tray 90 is adapted to that of the tray return line group 60 to prevent the baking tray 90 from swaying back and forth perpendicular to the conveying direction; The baking tray 90 is conveyed by the chain plate 11 and moves in the upper baking oven 20. Then, the pastries in the baking tray 90 are heated and baked by the heater 41 in the upper baking oven 20, and the water vapor can be drained through the exhaust pipe 21 at the top of the upper baking oven 20. When the baking tray 90 reaches the end of the conveying of the chain conveyor 10, at this time, the tray 53 corresponds to the chain conveyor 10. When the pushing plate 71 rotates around the sprocket shaft 13 of the chain conveyor 10, the baking tray 90 is pushed onto the tray 53; Subsequently, the tray 53 descends and corresponds to the left end of the tray return line group 60 (that is, one end of the conveying end of the chain conveyor 10). The baking tray 90 is pushed to the tray return line group 60 by the line transfer mechanism 50 to complete the line transfer of the baking tray 90. Subsequently, during the cyclic rotation of the chain plate 11 and after rotating to the lower part, the lower pull rod 72 pulls the baking tray 90 to move in the lower baking oven 30 along the track of the tray return line group 60. Subsequently, the pastries in the baking tray 90 can be baked by the heater 41 in the lower baking oven 30; In this application, the pushing plate 71 of the push-pull tray assembly 70 pushes the baking tray 90 onto the tray 53, and then the line transfer mechanism 50 transfers the baking tray 90 to the lower tray return line group 60. During the movement of the lower pull rod 72 following the chain plate 11, the pull rod 72 drags the baking tray 90 and the internal pastries to be baked in the lower baking oven 30, which solves the problem that the traditional single-layer conveying requires a longer baking line to meet the baking duration requirement, resulting in a large floor area of the equipment, and effectively simplifies the overall conveying machinery.

[0023] As Figure 3 、 Figure 8 、 Figure 13 、 Figure 14 shown, the line transfer mechanism 50 further includes a first servo electric cylinder 51 and a second servo electric cylinder 55 vertically arranged with respect to the first servo electric cylinder 51. The first servo electric cylinder 51 is vertically arranged, and the piston rod of the first servo electric cylinder 51 is fixed to the tray 53 through a suspension bracket 52. Thus, by the telescopic movement of the piston rod of the first servo electric cylinder 51, the lifting of the tray 53 is driven; On one side of the tray 53 close to the chain plate 11, a tray inlet 532 is reserved. The opening edges of the tray inlet 532 are all fixed with guide slope plates inclined outward. Through the guidance of the guide slope plates, it is avoided that the baking tray 90 gets stuck at the tray inlet 532 when sliding into the tray 53. On the side of the tray 53 far from the chain plate 11, a tray pushing port 531 is reserved; The piston rod of the second servo electric cylinder 55 is parallel to and corresponds to the tray return line group 60. When the piston rod of the first servo electric cylinder 51 drives the tray 53 to descend and correspond to the tray return line group 60, at this time, the piston rod of the second servo electric cylinder 55 corresponds to the tray pushing port 531. By the extension of the piston rod of the second servo electric cylinder 55, the baking tray 90 on the tray 53 can be pushed onto the tray return line group 60; The rewinding wire group 60 includes two symmetrically arranged sliding frames 61 fixed in the lower baking oven 30 by multiple legs 62. The distance between the two sliding frames 61 is adapted to the width of the baking tray 90. At one end of the two sliding frames 61 close to the wire transfer mechanism 50, inclined guiding plates are fixed outward. The baking tray 90 can be guided by the guiding plates, and at the same time, the problem that the baking tray 90 gets stuck when moving towards the sliding frame 61 can be avoided. Baffles 91 are fixedly installed on both sides of the baking tray 90. The pull rod 72 includes a vertical rod 721 fixed on the chain plate 11 and a horizontal rod 722 vertically fixed to the vertical rod 721. When the baking tray 90 is pushed onto the sliding frame 61 by the piston rod of the second servo electric cylinder 55, the baffle 91 is placed below the chain plate 11, and at the same time, the baffle 91 is on the path of the horizontal rod 722 rotated to the lower side. When the horizontal rod 722 moves horizontally along with the lower chain plate 11 and when the horizontal rod 722 abuts against the baffle 91, the horizontal rod 722 can push the baffle 91 and the baking tray 90 to move from left to right along the sliding frame 61.

[0024] As Figure 8 、 Figure 14 shown, an arc-shaped plate 92 with an opening facing the first servo electric cylinder 51 is fixed to the upper end of the baffle 91. After the horizontal rod 722 abuts against the baffle 91, the horizontal rod 722 is placed inside the concave side of the arc-shaped plate 92. After the horizontal rod 722 moves to the right end of the chain plate conveyor 10 (that is, the end of the chain plate conveyor 10 far from the wire transfer mechanism 50), when the chain plate 11 with the horizontal rod 722 rotates clockwise around the sprocket shaft 13, under the action of the arc-shaped plate 92, the horizontal rod 722 will first lift the right end of the baking tray 90 upward through the arc-shaped plate 92. When the horizontal rod 722 continues to rise and the contact position with the arc-shaped plate 92 gradually approaches the arc top and separates from the arc top, under the action of gravity, the baking tray 90 falls and collides with the sliding frame 61. Under the vibration, the pastries in the baking tray 90 after baking can be loosened, thus facilitating the demoulding of the pastries.

[0025] As Figure 1 、 Figure 2 、 Figure 3 shown, one end of the upper baking oven 20 and the lower baking oven 30 close to the wire transfer mechanism 50 is fixed by a wire transfer box 31, so that the baking tray 90 is in a relatively sealed space during the wire transfer process, thereby avoiding the problem of pastry shrinkage caused by large temperature differences during outdoor wire transfer, and at the same time avoiding the problem of heat loss caused by outdoor wire transfer. The first servo electric cylinder 51 and the second servo electric cylinder 55 are both fixed on the wire transfer box 31, and two guide rods 511 passing through the wire transfer box 31 are fixedly parallel to the piston rod of the first servo electric cylinder 51 to improve the lifting stability of the tray 53.

[0026] As Figure 4 、Figure 6 , Figure 10 As shown in Figure 10 , strip holes 111 are formed in multiple link plates 11. The push plate 71 and the link plate 11 with strip holes 111 are fixedly connected through a plurality of hinges 711, and the hinges 711 are placed on the left side of the upper push plate 71. At the same time, the outer dimension of the strip hole 111 is larger than the cross-section of the lower surface of the push plate 71, so that the push plate 71 can deflect by the flipping of the hinge 711. The pull rod 72 is fixed on the link plate 11 on one side of the strip hole 111, and the pull rod 72 is placed behind the advancing direction of the push plate 71 to ensure that the push plate 71 can first push the baking tray 90 onto the tray 53, so as to ensure the priority operation of the push plate 71 and avoid interference between the pull rod 72 and the baking tray 90. The frame 12 is fixed with a long straight plate 73 through a plurality of cross braces 75. The long straight plate 73 is placed inside the conveyor chain to avoid affecting the normal operation of the conveyor chain. At the same time, arc-shaped side braces 74 are tangentially fixed at both ends of the long straight plate 73. The side braces 74 are coaxially arranged with the sprocket shaft 13 of the link plate conveyor 10, that is, the arc-shaped side braces 74 are attached to the inner surface of the link plate 11 rotating around the sprocket shaft 13. At the same time, the long straight plate 73 is placed below the link plate 11 in the upper region of the sprocket shaft 13 and is attached to the lower surface of the link plate 11. One is to support the link plate 11 in the upper region, and the other is to support the upper push plate 71. When the push plate 71 passes through the left side brace 74, when the lower end of the push plate 71 passes through the strip hole 111 and abuts against the side brace 74, at this time, through the support of the side brace 74 on the push plate 71, the push plate 71 can maintain the pushing state of the baking tray 90.

[0027] As Figure 2 , Figure 3 , Figure 6 Figure 7 As shown in Figure 2 , etc., the right end of the frame 12 is fixed with a slag recovery tray 80 placed below the conveyor chain of the link plate conveyor 10 through a support frame 84. At the same time, the slag recovery tray 80 is wider than the baking tray 90. Therefore, when the link plate conveyor 10 conveys pastries, the pastry crumbs fall through the gaps of the link plates 11 and are recovered through the slag recovery tray 80, preventing the slag from falling into the baking tray 90 on the carriage 61. At the same time, when the lower push plate 71 bypasses the left sprocket shaft 13 and is placed below the sprocket shaft 13, the lower push plate 71 partially flips into the strip hole 111 through the hinge 711, causing the push plate 71 to deflect, and its lower edge abuts against the upper surface of the slag recovery tray 80 under the action of gravity. Therefore, when the lower push plate 71 moves from left to right, the slag on the slag recovery tray 80 can be cleaned by the push plate 71 and cleaned to the right end of the link plate conveyor 10, facilitating the centralized cleaning of the slag.

[0028] As Figure 11 , Figure 12As shown, the slag recovery tray 80 includes a large tray 81 and a small tray 82. The small tray 82 is placed at the input end of the chain conveyor 10, that is, it extends out of the chain conveyor 10. Therefore, it is convenient for the small tray 82 to clean the slag. The distance between the two groups of pull rods 72 is greater than the width of the large tray 81. The cross bar 722 passes through the avoidance opening 821 formed between the large tray 81 and the small tray 82, avoiding the problem of interference between the cross bar 722 and the slag recovery tray 80 when the cross bar 722 rotates around the sprocket shaft 13. At the same time, the extension of the small tray 82 also facilitates the cleaning of the slag.

[0029] As Figure 4 、 Figure 11 shown, a scraper 83 is fixed at one end of the upper surface of the large tray 81 close to the small tray 82. When the lower push plate 71 passes by the scraper 83, the slag carried on the lower surface of the push plate 71 is cleaned by the scraper 83 at this time, so as to ensure the cleanliness of the push plate 71 and prevent the slag on the push plate 71 from falling into the baking tray 90.

[0030] As Figure 4 、 Figure 12 shown, a plurality of rib plates 842 are fixed between the lower surface of the large tray 81 and the support frame 84. At the same time, the two ends of the large tray 81 in the length direction are fixed by the tension ribs 841, so as to improve the support strength and stability of the support frame 84 for the slag recovery tray 80. By fixing the slag recovery tray 80 in a single-side end manner, the left end of the slag recovery tray 80 is in a suspended state, thus avoiding interfering with the rotation of the cross bar 722 and the normal line transfer of the baking tray 90.

[0031] As Figure 3 shown, a proximity switch 54 is fixed on the side of the line transfer box 31 away from the chain plate 11. The proximity switch 54 corresponds to the baking tray 90 on the chain plate 11. When the tray 53 corresponds to the chain conveyor 10, the proximity switch 54 is placed directly behind the push tray opening 531 at this time. When the push plate 71 pushes the baking tray 90 onto the tray 53, the proximity switch 54 detects the position of the baking tray 90 at the same time, so as to detect the position of the baking tray 90. And the proximity switch 54 is controlled by a program control switch together with the first servo electric cylinder 51 and the second servo electric cylinder 55, so as to realize the automatic lifting of the tray 53 and the pushing of the baking tray 90 onto the sliding rack 61.

[0032] Working principle: Place the baking tray 90 with pastries on the conveying chain of the chain conveyor 10, and at the same time, the side with the baffle 91 is placed on the outside. Then, the conveying chain rotates clockwise, so that the baking tray 90 is baked from right to left in the upper baking oven 20. When the baking tray 90 reaches the position of the tray 53, one end of the baking tray 90 is guided onto the tray 53 through the guiding bevel groove; Subsequently, when the chain plate 11 with the push plate 71 rotates around the sprocket shaft 13, the push plate 71 will push the baking tray 90 onto the tray 53, and the baking tray 90 will move away from the conveying chain. Subsequently, the proximity switch 54 detects the position information of the baking tray 90, and through the program control switch, the first servo electric cylinder 51 is started, and the piston rod drives the tray 53 to descend and correspond to the carriage 61; Subsequently, the second servo electric cylinder 55 is started. When the piston rod pushes the baking tray 90 onto the carriage 61 through the push plate opening 531 and the lower cross bar 722 moves and abuts against the baffle 91, at this time, the lower baking tray 90 slides to the right through the lower cross bar 722 moving from left to right, and after leaving the tray 53, then the piston rod of the second servo electric cylinder 55 is retracted, and the piston rod of the first servo electric cylinder 51 contracts, so that the tray 53 can be reset. The pastries in the baking tray 90 are baked in the lower baking oven 30.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, based on the technical concept of the chain plate type baking tunnel furnace based on thermal radiation heating and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A chain plate type baking tunnel furnace based on thermal radiation heating, comprising a chain plate conveyor (10) for conveying a baking tray (90) and a thermal radiation heating system (40), characterized in that: An upper baking box (20) is fixed above the frame (12) of the chain conveyor (10), and a lower baking box (30) is fixed below the frame (12); A line transfer mechanism (50) is provided at one end of the frame (12), and the line transfer mechanism (50) comprises a liftable tray (53); A push-pull plate assembly (70) is fixed on each of the plurality of chain plates (11) of the chain plate conveyor (10), wherein the push-pull plate assembly (70) comprises a push plate (71) fixed on the chain plate (11) and two groups of symmetrically distributed pull rods (72); A return coil assembly (60) placed in the lower baking oven (30) is fixed below the frame (12); The baking tray (90) is transported by the chain plate (11) and moves in the upper baking box (20). After the baking tray (90) reaches the conveying end of the chain plate conveyor (10), it is pushed onto the tray (53) by the push plate (71); The tray (53) descends and corresponds to the return line group (60), and the baking tray (90) is pushed to the return line group (60) via the line transfer mechanism (50). The pull rod (72) rotates to the bottom to pull the baking tray (90) to move along the trajectory of the return line group (60) in the lower baking box (30).

2. The chain plate type baking tunnel furnace based on thermal radiation heating according to claim 1 is characterized in that: The line transfer mechanism (50) further comprises a first servo electric cylinder (51) and a second servo electric cylinder (55) arranged perpendicularly to the first servo electric cylinder (51); the first servo electric cylinder (51) is arranged vertically, and a piston rod of the first servo electric cylinder (51) is fixed to the tray (53) via a hanger (52); The tray (53) is provided with a tray entry opening (532) on a side close to the chain plate (11), and a tray push opening (531) on a side away from the chain plate (11); The piston rod of the second servo electric cylinder (55) is parallel to and corresponds to the return coil assembly (60), and the return coil assembly (60) comprises two symmetrically arranged slide racks (61) fixed in the lower baking oven (30) via a plurality of legs (62); Baffles (91) are fixedly mounted on both sides of the baking tray (90); The pull rod (72) comprises a vertical rod (721) fixed on the chain plate (11) and a horizontal rod (722) fixed vertically to the vertical rod (721), and the baffle (91) is placed on the route of the horizontal rod (722) rotating downward.

3. The chain plate type baking tunnel furnace based on thermal radiation heating according to claim 2 is characterized in that: An arc-shaped plate (92) with an opening facing the first servo electric cylinder (51) is fixed to the upper end of the baffle (91).

4. The chain plate type baking tunnel furnace based on thermal radiation heating according to claim 2 is characterized in that: One end of the upper baking box (20) and the lower baking box (30) close to the line transfer mechanism (50) is fixed by a line transfer box (31); The first servo electric cylinder (51) and the second servo electric cylinder (55) are both fixed on the transfer box (31).

5. The chain plate type baking tunnel furnace based on thermal radiation heating according to claim 1 is characterized in that: A plurality of the chain plates (11) are provided with strip holes (111); the push plate (71) and the chain plate (11) with the strip holes (111) are fixedly connected via a plurality of hinges (711); the pull rod (72) is fixed to the chain plate (11) on one side of the strip hole (111); and the pull rod (72) is placed behind the push plate (71) in the direction of travel; The frame (12) is fixed with a long straight plate (73) via a plurality of cross bracing rods (75), arc-shaped side support plates (74) are fixed tangentially to both ends of the long straight plate (73), and the side support plates (74) are coaxially arranged with the sprocket shaft (13) of the chain conveyor (10); The long straight plate (73) is placed below the chain plate (11) in the upper region of the sprocket shaft (13).

6. The chain plate type baking tunnel furnace based on thermal radiation heating according to claim 1 is characterized in that: The frame (12) is fixed with a slag recovery plate (80) disposed below the conveying chain of the chain conveyor (10) via a support frame (84); The push plate (71) at the bottom contacts the upper surface of the slag recovery tray (80).

7. The chain plate type baking tunnel furnace based on thermal radiation heating according to claim 6 is characterized in that: The slag recovery plate (80) comprises a large plate (81) and a small plate (82), the small plate (82) being placed at the input end of the chain conveyor (10), and the distance between the two sets of pull rods (72) being greater than the width of the large plate (81); An escape opening (821) is formed between the large plate (81) and the small plate (82).

8. The chain plate type baking tunnel furnace based on thermal radiation heating according to claim 7 is characterized in that: A scraper (83) is fixed to one end of the upper surface of the large plate (81) close to the small plate (82).

9. The chain plate type baking tunnel furnace based on thermal radiation heating according to claim 7, characterized in that: A plurality of ribs (842) are fixed between the lower surface of the large plate (81) and the support frame (84), and both ends of the large plate (81) in the length direction are fixed by tensioning bars (841).

10. The chain plate type baking tunnel furnace based on thermal radiation heating according to claim 4, characterized in that: A proximity switch (54) is fixed to a side of the transfer box (31) away from the chain plate (11), and the proximity switch (54) corresponds to the baking tray (90) on the chain plate (11).

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