Multi-layer tunnel furnace and tunnel baking line

Abstract

The application discloses a kind of multilayer tunnel furnace and tunnel baking line, it is related to baking solidification technical field.Therein, multilayer tunnel furnace includes the conveying assembly being arranged through furnace body, and the material frame is vertically moved in baking oven, and conveying assembly has transfer position and avoidance position, when conveying assembly is in transfer position, control material frame is moved in Z direction, make the product on conveying assembly transfer to material frame;Control material frame is moved in Z direction, make the product on material frame transfer to conveying assembly;In the scheme, only by controlling conveying assembly to move between transfer position and avoidance position, the transfer of product between conveying assembly and material frame can be realized, so as to realize the efficient entry and exit of product baking furnace, and additional auxiliary flow circulation fixture does not need to be set, which simplifies the structure setting in baking furnace, reduces the failure rate of equipment;At the same time, the manufacturing cost of equipment is also reduced, and the use of resources is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of baking curing, in particular to a multi-layer tunnel furnace and a tunnel baking line. BACKGROUND

[0002] At present, the track for conveying and moving products in the multi-layer baking furnace used in the dispensing industry usually does not penetrate the baking furnace (is disconnected at the baking furnace), when it is necessary to transfer the products from the track to the baking furnace, an additional auxiliary flow tool such as a mechanical hand is needed to transfer the products on the track to the hopper in the baking furnace, and the movement of the hopper in the baking furnace is driven by a chain, which has certain instability, and the precise cooperation between the mechanical hand and the hopper is needed to realize the reliable transfer of the products, which requires a high degree of cooperation of the equipment; after the products are baked in the baking furnace, the mechanical hand is needed to transfer them from the hopper to the track again; on the one hand, the transfer of the products between the track and the baking furnace is relatively complicated, on the other hand, the structure of the baking furnace is relatively complex due to the need to set up an additional auxiliary flow tool, and the failure rate of the equipment is high. SUMMARY

[0003] The main purpose of the present application is to provide a multi-layer tunnel furnace and a tunnel baking line, which aims to improve the problem that the operation is relatively complicated and the failure rate of the equipment is high due to the need to set up an additional auxiliary flow tool to drive the products to move between the track and the baking furnace.

[0004] To achieve the above-mentioned purpose, the present application provides a multi-layer tunnel furnace, which has X direction, Y direction and Z direction intersecting with each other, comprising:

[0005] a furnace body, the furnace body is provided with a baking oven, the baking oven has a baking space for baking products; and

[0006] a conveying assembly extending along the X direction, the conveying assembly is arranged in the baking space, and the two ends of the conveying assembly along the X direction respectively extend out of the furnace body to form an inlet end at one end of the furnace body and an outlet end at the other end;

[0007] a material frame moving along the Z direction and arranged in the baking space, the material frame is sequentially provided with a plurality of placing spaces for placing the products along the Z direction;

[0008] a baking assembly arranged in the furnace body for baking the products;

[0009] The conveying assembly has a transfer position and an avoiding position, when the conveying assembly is in the transfer position, the magazine frame is controlled to move in the Z direction, the product is transferred from the conveying assembly to the magazine frame, the magazine frame is controlled to move in the Z direction, the product is transferred from the magazine frame to the conveying assembly; when the conveying assembly is in the avoiding position, the product is avoided to move with the magazine frame in the Z direction.

[0010] In an embodiment, the conveying assembly comprises a first transmission rod and a second transmission rod which are arranged in the Y direction, the first transmission rod and the second transmission rod both extend in the X direction;

[0011] The first transmission rod and the second transmission rod are both arranged in the Y direction in the baking space, in the Y direction, the first transmission rod and the second transmission rod have a first position in which they are close to each other and a second position in which they are away from each other; when the first transmission rod and the second transmission rod are in the first position, the conveying assembly is in the transfer position, when the first transmission rod and the second transmission rod are in the second position, the conveying assembly is in the avoiding position;

[0012] The first transmission rod and the second transmission rod are respectively provided with a plurality of driving rollers which are arranged in the X direction on one side of the first transmission rod and the second transmission rod, and the rotation axes of the driving rollers extend in the Y direction.

[0013] In an embodiment, the multi-layer tunnel furnace further comprises a lifting frame which is arranged in the baking space and is used to drive the magazine frame to move in the Z direction;

[0014] The magazine frame comprises a first bearing frame and a second bearing frame which are connected to the lifting frame, the first bearing frame and the second bearing frame are arranged in the Y direction, the first bearing frame is arranged close to the first transmission rod, and the second bearing frame is arranged close to the second transmission rod; and

[0015] A supporting member is arranged on one side of the first bearing frame and the second bearing frame, respectively, and a plurality of the placing spaces are formed in the area between the two supporting members; in the Z direction, the projections of the two supporting members on the furnace body are located in the area between the projections of the first transmission rod and the second transmission rod on the furnace body.

[0016] In an embodiment, the supporting member comprises a plurality of bearing rods which extend in the Z direction, and the bearing rods are arranged in the X direction; and

[0017] A supporting plate is connected to the bearing rods on the side facing the placing spaces, the supporting plate has a plurality of supporting plates which are arranged in the Z direction on the bearing rods; the placing spaces are formed in the area between adjacent supporting plates in the Z direction.

[0018] In the X direction, the supporting plate projects a1 on the furnace body, and the driving roller projects a2 on the furnace body; when the conveying assembly is in the transfer position, the a1 is at least partially located inside the a2; when the conveying assembly is in the avoiding position, the a1 is located outside the a2.

[0019] In an embodiment, the multi-layer tunnel furnace further comprises an adjusting block arranged in the furnace body and moving along the Y direction; one of the first transmission rod and the second transmission rod is movably connected to the adjusting block along the Y direction, so as to have the first position and the second position on the adjusting block;

[0020] The lifting frame has a guide member extending along the Y direction, the first transmission rod is movably connected to the adjusting block along the Y direction, and the first supporting frame is slidingly arranged in the guide member along the Y direction; or

[0021] The second transmission rod is movably connected to the adjusting block along the Y direction, and the second supporting frame is slidingly arranged in the guide member along the Y direction.

[0022] In an embodiment, the first transmission rod is provided with a driving block, the driving block is provided with a stopper on one side and / or the other side along the X direction, the stopper has two, and the two stoppers are arranged along the Y direction;

[0023] The first supporting frame has a driving rod extending along the Z direction, the driving rod is arranged between the two stoppers on the same side, the driving rod abuts against the stopper on the side close to the placement space, so that the first transmission rod is in the second position; the driving rod abuts against the stopper on the side away from the placement space, so that the first transmission rod is in the first position.

[0024] In an embodiment, the baking oven is provided with a filtering assembly on each side along the Y direction, the baking assembly delivers hot air to the baking space through the filtering assembly, so as to bake the product;

[0025] The multi-layer tunnel furnace further comprises a conveying air hole arranged above the furnace body, so as to communicate the outside with the space in the furnace body.

[0026] In an embodiment, the filtering assembly and the side wall of the furnace body are arranged along the Y direction, so that the interval between the two forms an air supply channel;

[0027] The baking assembly comprises: a blowing fan arranged in the furnace body and above the baking oven, the blowing fan being used to deliver air flow to the blowing channel and into the baking space through the filtering assembly; and

[0028] A heater arranged above the blowing channel, the heater being used to heat the air flow generated by the blowing fan.

[0029] In an embodiment, the top wall of the baking oven is provided with a ventilation plate, the ventilation plate being used to communicate the baking space and the space in the furnace body;

[0030] The blowing fan is arranged at a position corresponding to the ventilation plate, and is used to draw air in the baking space out through the ventilation plate and deliver the air to the blowing channel again.

[0031] The present application also provides a tunnel baking line comprising at least two multi-layer tunnel furnaces according to the above embodiments, the at least two multi-layer tunnel furnaces being arranged in sequence;

[0032] The feeding end of one of the adjacent two multi-layer tunnel furnaces is connected to the discharging end of the other multi-layer tunnel furnace.

[0033] The multi-layer tunnel furnace comprises a conveying assembly arranged through the furnace body and a material frame vertically moving in the baking oven, and the conveying assembly has a transfer position and an avoiding position, when the conveying assembly is at the transfer position, the material frame is controlled to move upward in the Z direction, so that the product on the conveying assembly is transferred to the material frame; the material frame is controlled to move downward in the Z direction, so that the product on the material frame is transferred to the conveying assembly; when the product in different placement spaces is moved by the material frame in the Z direction, the conveying assembly is controlled to be at the avoiding position, so as to avoid the movement of the product with the material frame; in the present scheme, only by controlling the conveying assembly to move between the transfer position and the avoiding position, the transfer of the product between the conveying assembly and the material frame can be realized, so that the product can be efficiently fed into and discharged from the baking furnace, and an additional auxiliary flow tool is not needed, the structure arrangement in the baking furnace is simplified, the failure rate of the equipment is reduced, and the manufacturing cost and the use of resources are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0035] Figure 1 It is an overall structure schematic diagram of an embodiment of the multi-layer tunnel furnace.

[0036] Figure 2 For the present invention Figure 1 The structure schematic diagram after removing the outer shell in the present invention;

[0037] Figure 3 The baking oven sectional view structure schematic diagram of one embodiment of the multi-layer tunnel furnace in the present invention;

[0038] Figure 4 For the present invention Figure 2 The structure schematic diagram after removing the inner shell in the present invention;

[0039] Figure 5 The volute structure schematic diagram of one embodiment of the multi-layer tunnel furnace in the present invention;

[0040] Figure 6 The schematic diagram of the cooperation relationship of the material frame, the lifting frame and the conveying assembly of one embodiment of the multi-layer tunnel furnace in the present invention;

[0041] Figure 7 For the present invention Figure 6 The enlarged schematic diagram of the structure at A in the present invention;

[0042] Figure 8 The schematic diagram of the cooperation relationship of the material frame and the lifting frame of one embodiment of the multi-layer tunnel furnace in the present invention;

[0043] Figure 9 The schematic diagram of the whole structure of the material frame of one embodiment of the multi-layer tunnel furnace in the present invention;

[0044] Figure 10 For the present invention Figure 9 The front view schematic diagram of the material frame structure in the present invention;

[0045] Figure 11 The schematic diagram of the cooperation relationship of the conveying assembly and the material frame of one embodiment of the multi-layer tunnel furnace in the present invention;

[0046] Figure 12 For the present invention Figure 11 The enlarged schematic diagram of the structure at B in the present invention;

[0047] Figure 13 The structure schematic diagram of the conveying assembly of one embodiment of the multi-layer tunnel furnace in the present invention;

[0048] Figure 14 For the present invention Figure 13 The enlarged schematic diagram of the structure at C in the present invention;

[0049] Figure 15 For the present invention Figure 13 The enlarged schematic diagram of the structure at D in the present invention.

[0050] Explanation of the reference signs:

[0051] 100. Multi-layer tunnel furnace; 1. Furnace body; 11. Baking chamber; 111. Ventilation plate; 112. Through hole; 113. Baking space; 12. Adjusting block; 121. Adjusting motor; 122. Adjusting screw; 13. Filtering assembly; 14. Air conveying hole; 15. Air conveying channel; 16. Outer shell; 17. Inner shell; 171. Heat preservation door;

[0052] 2. Conveying assembly; 21. Inlet end; 22. Outlet end; 23. First transmission rod; 231. Driving block; 232. Stop piece; 24. Second transmission rod; 25. Driving roller; 251. Driving gear; 252. Driving motor;

[0053] 3. Material frame; 31. First bearing frame; 311. Driving rod; 32. Second bearing frame; 33. Supporting piece; 331. Bearing rod; 332. Supporting plate;

[0054] 4. Baking assembly; 41. Air conveying fan; 411. Volute; 4111. Air outlet; 42. Heater;

[0055] 5. Lifting frame; 51. Guide piece; 52. Lifting motor; 53. Lifting screw;

[0056] 6. Material blocking cylinder; 7. Telescopic cylinder; 8. Product.

[0057] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0059] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0060] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0061] At present, the multi-layer baking furnace used in the dispensing industry is usually not through the baking furnace (broken at the baking furnace) when the product is baked. When the product needs to be transferred from the track to the baking furnace, an additional auxiliary flow tool such as a mechanical hand is needed to transfer the product on the track to the hopper in the baking furnace, and the movement of the hopper in the baking furnace is driven by a chain. Since the chain drive has a certain instability, the mechanical hand and the hopper need to be precisely matched to realize reliable transfer of the product, which requires high equipment. When the product is baked in the baking furnace, it also needs to be transferred from the hopper to the track again by the mechanical hand. On the one hand, the transfer of the product between the track and the baking furnace is complicated, and on the other hand, the structure of the baking furnace is complex and the equipment failure rate is high due to the need to set up an additional auxiliary flow tool.

[0062] Based on this, the embodiment of the present application provides a kind of multi-layer tunnel furnace 100, to solve the above problems;Please refer to Figures 1-15 , multi-layer tunnel furnace 100 has X direction, Y direction and Z direction that intersect each other in twos, including furnace body 1, conveying assembly 2, material frame 3, baking assembly 4;Wherein furnace body 1 includes outer shell 16 and inner shell 17, inner shell 17 is located at the inner side of outer shell 16, outer shell 16 is used to isolate inner shell 17 from the outside, improve the use safety of the multi-layer tunnel furnace 100;As Figure 3 Indicated, baking oven 11 is located in inner shell 17, and baking oven 11 has baking space 113 for baking product 8;Conveying assembly 2 extends along X direction and conveying assembly 2 is located in baking space 113, as Figure 2 、 Figure 4As shown, the conveying assembly 2 extends outward from both ends of the furnace body 1 along the X direction, and forms a feeding end 21 at one end of the furnace body 1 and a discharging end 22 at the other end. The conveying assembly 2 is used to convey the product 8 (which has completed the previous process) at the feeding end 21 to the baking space 113 for baking. After baking, the product 8 is conveyed to the discharging end 22 (for the next process). The material frame 3 is moved along the Z direction and connected to the baking space 113. The material frame 3 in the Z direction has multiple placement spaces arranged in sequence, and each placement space is used to place the product 8 to be baked. The baking assembly 4 is disposed in the furnace body 1 and is used to bake the product 8 located in the baking space 113. For example, the baking assembly 4 can be disposed between the inner shell 17 and the baking oven 11, or the baking assembly 4 can be disposed in the baking oven 11.

[0063] In this embodiment, to facilitate the inspection and regular maintenance of components such as the conveying assembly 2 and the material frame 3 located in the baking space 113, inspection ports are provided on both sides of the furnace body 1 along the Y direction. The outer shell 16 has openable and closable protective doors on both sides along the Y direction, and the inner shell 17 has openable and closable heat-insulating doors 171 on both sides along the Y direction, corresponding to the protective doors. The heat-insulating doors 171 effectively prevent heat loss from the baking space 113 to the outside. For example, the inner shell 17 can be insulated. Made of materials to further improve the heat preservation effect and prevent heat loss; when the multi-layer tunnel furnace 100 is performing baking work, the protective door and the heat preservation door 171 are both closed to seal the inspection port; when it is necessary to inspect and maintain the components such as the conveying component 2 and the material frame 3 located in the baking space 113, the staff will open the protective door and the heat preservation door 171 in sequence, and carry out inspection, maintenance and cleaning of the conveying component 2 and the material frame 3 in the baking space 113 through the inspection port.

[0064] In this embodiment, in order for product 8 to enter the baking space 113 from the feeding end 21, and after baking in the baking space 113, to be conveyed from the baking space 113 to the discharging end 22, as follows: Figure 2 , Figure 4 As shown, the baking oven 11 has through holes 112 at both ends along the X direction, which connect the baking space 113 and the outside. The conveying component 2 extends from the baking space 113 to the outside through the through holes 112 at both ends along the X direction. Similarly, perforations are provided at corresponding positions at both ends along the X direction on the inner shell 17 and the outer shell 16, so that the two ends of the conveying component 2 extend outward along the X direction.

[0065] In the embodiment, the conveying assembly 2 has a transfer position and an avoiding position, and the conveying assembly 2 conveys the product 8 at the feeding end 21 to a predetermined position in the baking space 113, for transferring the product 8 on the conveying assembly 2 to the tray 3; for example, when the product 8 in the corresponding placement space on the tray 3 is completed baking (it needs to be transferred from the tray 3 to the conveying assembly 2), and the product 8 completed baking is conveyed by the conveying assembly 2 to the discharging end 22, for transferring to the next process, the transferring steps are as follows:

[0066] S1: first control the conveying assembly 2 to move from the transfer position to the avoiding position;

[0067] S2: control the tray 3 to move in the Z direction, so as to move the product 8 needing to be transferred from the current position to a predetermined position above the conveying assembly 2;

[0068] S3: control the conveying assembly 2 to move from the avoiding position to the transfer position;

[0069] S4: control the tray 3 to move in the Z direction by a predetermined distance (h1) from top to bottom, so as to transfer the product 8 in the corresponding placement space on the tray 3 to the conveying assembly 2 at the transfer position;

[0070] S5: control the conveying assembly 2 to start, and convey the product 8 transferred to the conveying assembly 2 to the discharging end 22.

[0071] The above process is the process of transferring the product 8 completed baking from the tray 3 to the conveying assembly 2, and conveying it to the discharging end 22; at this time, the placement space on the tray 3 for placing the product 8 just transferred away is in an idle state, in order to fully utilize the placement space and improve the baking efficiency of the product 8, the product 8 at the feeding end 21 and waiting to enter the oven 1 for baking can be transferred to the idle placement space, and the transferring steps are as follows:

[0072] L1: ensure that the conveying assembly 2 is at the transfer position;

[0073] L2: control the conveying assembly 2 to start, and transfer the product 8 at the feeding end 21 to a predetermined position (corresponding to the position of the tray 3) in the baking space 113;

[0074] L3: control the tray 3 to move upward in the Z direction by a predetermined distance (also h1), so as to transfer the product 8 on the conveying assembly 2 to the above-mentioned placement space.

[0075] In the embodiment, the above steps S1-S5 and steps L1-L3 are repeated, so that the product 8 in the corresponding placement space of the material frame 3 and completed roasting is transferred from the material frame 3 to the conveying assembly 2, and conveyed to the discharge end 22 by the conveying assembly 2 (to perform the next process), and the product 8 at the feeding end 21 is transferred to the placement space in the idle state, so that the high efficiency of the product 8 roasting operation is realized; for example, in the specific implementation process, according to the needs of the roasting process, it may be necessary to adjust the position height of the material frame 3 in the roasting space 113, in order to avoid affecting the movement of the product 8 along the Z direction with the material frame 3 in the roasting space 113, the conveying assembly 2 in the embodiment is in the avoiding position state when it is not necessary to perform the conveying of the product 8.

[0076] Referring to Figure 6 , Figure 11 , Figure 13 , in an embodiment of the present application, the conveying assembly 2 includes first transmission rods 23 and second transmission rods 24 arranged at intervals along the Y direction, the first transmission rods 23 and the second transmission rods 24 extend along the X direction, the two ends of the first transmission rods 23 and the second transmission rods 24 along the X direction respectively extend out of the roasting space 113 through the through holes 112 provided on the roasting oven 11, and are placed at the two ends of the furnace body 1 along the X direction; in the embodiment, the first transmission rods 23 and the second transmission rods 24 are movably connected in the furnace body 1 along the Y direction, for example, as shown in Figure 7 , Figure 13 , sliding members (such as matched sliding blocks, sliding grooves, etc.) for enabling the first transmission rods 23 and the second transmission rods 24 to slide in the furnace body 1 along the Y direction can be respectively arranged at the two ends of the furnace body 1 along the X direction (outside the roasting oven 11), as shown in Figure 11 , telescopic cylinders 7 corresponding to the first transmission rods 23 and the second transmission rods 24 are fixedly installed in the furnace body 1, and are used to drive the first transmission rods 23 and the second transmission rods 24 to move in the furnace body 1 along the Y direction; wherein the telescopic cylinder 7 corresponding to the first transmission rod 23 has a telescopic end fixedly connected with the first transmission rod 23, and the telescopic cylinder 7 corresponding to the second transmission rod 24 has a telescopic end fixedly connected with the second transmission rod 24, as a preferred example, as shown in

[0077] Exemplarily, the telescopic air cylinder 7 in the embodiment is arranged in the space of the furnace body 1 on the side opposite to the first transmission rod 23 and the second transmission rod 24; in the Y direction, the telescopic air cylinder 7 is controlled to extend and drive the first transmission rod 23 and the second transmission rod 24 to move in the direction of approaching each other by a predetermined distance (h2), so that the first transmission rod 23 and the second transmission rod 24 are both in the first position, and the conveying assembly 2 is in the transfer position; in the Y direction, the telescopic air cylinder 7 is controlled to contract and drive the first transmission rod 23 and the second transmission rod 24 to move in the direction of moving away from each other by a predetermined distance (h2), so that the first transmission rod 23 and the second transmission rod 24 are both in the second position, and the conveying assembly 2 is in the avoiding position.

[0078] In the embodiment, as shown in Figure 7 , a plurality of drive rollers 25 are rotatably arranged on the side of the first transmission rod 23 and the second transmission rod 24 facing each other, and the plurality of drive rollers 25 are distributed on the first transmission rod 23 and the second transmission rod 24 along the X direction; and the rotation axes of the drive rollers 25 extend along the Y direction, and the drive rollers 25 arranged on the first transmission rod 23 and the second transmission rod 24 are used to achieve the effect of conveying the product 8; specifically, the plurality of drive rollers 25 distributed on the first transmission rod 23 and the second transmission rod 24 are used to support the two side wall positions of the product 8 along the Y direction, so as to support the product 8, and when the drive rollers 25 are started and begin to rotate, the effect of conveying the product 8 is achieved; exemplarily, the embodiment provides a structure for driving the drive rollers 25 to rotate, as shown in Figure 14 , each drive roller 25 is coaxially rotatably provided with a drive gear 251 (the drive gear 251 is arranged on the side away from the placing space), and a gear set is arranged between the adjacent two drive rollers 25, the gear set is used to achieve the transmission of power between the adjacent two drive gears 251, and one end of the gear set is driven by a drive motor 252 arranged on the first transmission rod 23 or the second transmission rod 24; in the embodiment, the gear set is arranged to ensure that the rotation directions of the drive gears 251 are consistent, so as to achieve the effect of conveying the product 8 in the same direction.

[0079] Referring to Figure 6 , Figure 8As shown, the multi-layer tunnel furnace 100 further comprises a lifting frame 5 arranged in the baking space 113 and used to drive the material frame 3 to move in the Z direction; in this embodiment, there are two lifting frames 5 arranged in the baking space 113 along the Y direction, and the material frame 3 and the first transmission rod 23 and the second transmission rod 24 are located between the two lifting frames 5; as shown in the example, corresponding positions in the baking space 113 are respectively rotatably provided with lifting lead screws 53 threadedly connected with the lifting frames 5, and limit rods are rotatably arranged on both sides of the lifting lead screws 53 along the X direction, and the limit rods are vertically slidably connected with the lifting frames 5; a lifting motor 52 is arranged in the furnace body 1, and the lifting motor 52 drives the two lifting lead screws 53 to move through a belt wheel set or a chain wheel set, and is used to drive the two lifting frames 5 to synchronously move up and down in the Z direction.

[0080] In this embodiment, as shown in Figure 9 , Figure 10 the material frame 3 comprises a first bearing frame 31 and a second bearing frame 32 arranged along the Y direction, wherein the first bearing frame 31 is arranged close to the first transmission rod 23, and the second bearing frame 32 is arranged close to the second transmission rod 24, as shown in Figure 8 the first bearing frame 31 is connected to one of the lifting frames 5, and the second bearing frame 32 is connected to the other lifting frame 5, so that when the lifting motor 52 is started to drive the lifting frames 5 to move up and down in the Z direction, the first bearing frame 31 and the second bearing frame 32 are simultaneously driven to move in the Z direction; as shown in Figure 9 a supporting piece 33 is arranged on one side of the first bearing frame 31 and the second bearing frame 32, that is, the first bearing frame 31 is provided with a supporting piece 33 on the side facing the second bearing frame 32, and the second bearing frame 32 is provided with a supporting piece 33 on the side facing the first bearing frame 31, and a plurality of placement spaces (for placing products 8) arranged along the Z direction are formed between the two supporting pieces 33; as shown in Figure 8 the projections of the two supporting pieces 33 on the Z direction on the furnace body 1 are located between the projections of the first transmission rod 23 and the second transmission rod 24 on the furnace body 1, that is, the two supporting pieces 33 are located between the first transmission rod 23 and the second transmission rod 24 (at this time, the products 8 placed in the corresponding placement spaces on the supporting pieces 33 are also located between the first transmission rod 23 and the second transmission rod 24), so that when the first transmission rod 23 and the second transmission rod 24 move from the first position close to each other to the second position away from each other, the driving rollers 25 mounted on the first transmission rod 23 and the second transmission rod 24 will not hinder the products 8 from moving up and down in the Z direction with the material frame 3; that is, when the products 8 move up and down in the Z direction with the material frame 3, the two side edges of the products 8 in the Y direction will not touch the driving rollers 25 on the first transmission rod 23 and the second transmission rod 24.

[0081] Referring toFigure 9 As shown, in an embodiment of the present application, the supporting member 33 comprises a plurality of supporting rods 331 extending along the Z direction, and the plurality of supporting rods 331 are arranged at intervals along the X direction; as shown Figure 10 As shown, in the embodiment, the first supporting frame 31 comprises two first rod bodies arranged at intervals along the Z direction, the second supporting frame 32 comprises two second rod bodies arranged at intervals along the Z direction, the upper and lower ends of the plurality of supporting rods 331 mounted on the first supporting frame 31 are respectively fixedly mounted on the two first rod bodies, and the upper and lower ends of the plurality of supporting rods 331 mounted on the second supporting frame 32 are respectively fixedly mounted on the two second rod bodies; a plurality of supporting plates 332 are connected to the side of the supporting rod 331 facing the placing space, and in the embodiment, the supporting plates 332 are arranged along the horizontal direction and used for supporting the product 8; the supporting plates 332 on the first supporting frame 31 and the supporting plates 332 on the second supporting frame 32 are arranged one by one along the Z direction, so that the space between the two adjacent supporting plates 332 along the Z direction constitutes a placing space; when the product 8 is in the corresponding placing space, as shown Figure 10 As shown, the two ends of the product 8 along the Y direction are placed in the corresponding placing space under the support of the supporting plates 332 on the first supporting frame 31 and the second supporting frame 32.

[0082] In the embodiment, the supporting plates 332 can be arranged at equal intervals along the Z direction or can not be arranged at equal intervals, but arranging the supporting plates 332 at equal intervals along the Z direction is helpful for conveniently controlling the moving distance of the material frame 3 along the Z direction when the product 8 is transferred between the material frame 3 and the conveying assembly 2; when the supporting plates 332 are arranged at equal intervals along the Z direction, the distance of the material frame 3 controlled to move along the Z direction each time is a fixed parameter value h1 (the value of the h1 depends on the distance between the two adjacent supporting plates 332 along the Z direction), so as to be helpful for realizing more convenient moving control of the material frame 3 along the Z direction; as a preferred, the supporting plates 332 are arranged at equal intervals along the Z direction in the embodiment.

[0083] In the embodiment, the supporting rods 331 mounted on the first supporting frame 31 and the supporting rods 331 mounted on the second supporting frame 32 are arranged in the region between the two adjacent driving rollers 25, and in the X direction, the projection of the supporting plate 332 on the furnace body 1 is recorded as a1, and the projection of the driving roller 25 on the furnace body 1 is recorded as a2; when the first transmission rod 23 and the second transmission rod 24 are both in the first position, that is, the conveying assembly 2 is in the transfer position, at this time, a1 is at least partially located in a2; when the product 8 is completed and needs to be transferred from the material frame 3 to the conveying assembly 2 and conveyed to the discharge end 22, at this time, the two side walls of the product 8 along the Y direction are pressed against the upper surfaces of the supporting plates 332 at the same height, and the specific transfer steps are as follows:

[0084] S1: First of all, ensure that the first transmission rod 23 and the second transmission rod 24 are both in the second position, that is, the conveying assembly 2 is in the avoiding position, at this time, the projection a2 of the driving roller 25 along the X direction on the furnace body 1 and the projection a1 of the supporting plate 332 along the X direction on the furnace body 1 do not coincide, that is, the driving roller 25 does not hinder the lifting action of the product 8 along the Z direction with the material frame 3;

[0085] S2: Control the movement of the material frame 3 along the Z direction (the moving distance is an integer multiple of h1, and the specific multiple depends on the relative position of the product 8 to be transferred and the conveying assembly 2 in the baking space 113), so that the product 8 to be transferred is moved to a position above the driving roller 25;

[0086] S3: Control the first transmission rod 23 and the second transmission rod 24 to move from the second position to the first position, at this time, the projection a2 of the driving roller 25 along the X direction on the furnace body 1 and the projection a1 of the supporting plate 332 along the X direction on the furnace body 1 partially coincide;

[0087] S4: Control the material frame 3 to move downward along the Z direction by a predetermined distance (h1), when the product 8 moves downward with the material frame 3, the two ends of the product 8 along the Y direction will be hindered by the driving roller 25, thereby realizing the disengagement with the supporting plate 332, and making the two ends of the product 8 along the Y direction respectively abut against the driving roller 25, thereby realizing the effect of transferring the product 8 from the material frame 3 to the conveying assembly 2.

[0088] Alternatively, the two ends of the product 8 along the Y direction are not separated from the supporting plate 332, that is, at this time, the two ends of the product 8 along the Y direction are in contact with both the driving roller 25 and the supporting plate 332, and then the driving roller 25 is controlled to rotate, thereby realizing the transfer of the product 8 to the discharge end 22; as a preferred, in order to avoid unnecessary friction between the product 8 and the supporting plate 332 during the transfer of the product 8 to the discharge end 22, in this embodiment, it is preferred that when the material frame 3 moves downward along the Z direction by a predetermined distance (h1), the two ends of the product 8 along the Y direction are no longer in contact with the supporting plate 332 (only abut against the driving roller 25), at this time, the supporting plate 332 for supporting the product 8 is slightly lower in height along the Z direction than the height of the driving roller 25.

[0089] When the transfer of the product 8 is completed, at this time, the placing space for placing the product 8 is in an idle state, at this time, the product 8 at the feeding end 21 can be transferred to the idle placing space, and the specific transfer steps are as follows:

[0090] L1: Ensure that the first transmission rod 23 and the second transmission rod 24 are both in the first position, that is, the assembly is in the transfer position, at this time, the projection of the supporting plate 332 along the X direction on the furnace body 1 and the projection of the driving roller 25 along the X direction on the furnace body 1 partially coincide;

[0091] L2: Control the drive roller 25 to rotate, and transport the product 8 at the feeding end 21 to the predetermined position in the baking space 113 (corresponding to the position of the material frame 3).

[0092] L3: Control the material frame 3 to move upward along the Z direction by a predetermined distance (h1). At this time, the position height is slightly lower than that of the support plates 332 of the drive roller 25. As the material frame 3 moves upward, it will abut against the two sides of the product 8 along the Y direction. As the material frame 3 continues to move upward, the product 8 that was originally pressed against the drive roller 25 will be transferred to the aforementioned idle placement space in the material frame 3, thereby realizing the transfer of the processed product 8 from the conveying component 2 to the material frame 3.

[0093] In this embodiment, when the conveying component 2 is not required to perform the task of conveying product 8, it should be in a clearance position, that is, the first transmission rod 23 and the second transmission rod 24 should both be in the second position in the X direction, so that the projection a2 of the drive roller 25 on the furnace body 1 and the projection a1 of the support plate 332 on the furnace body 1 do not overlap. Figure 7 As shown, since the support frame (including the support rod 331 and the support plate 332) is located in the area between the first transmission rod 23 and the second transmission rod 24, when the first transmission rod 23 and the second transmission rod 24 move from a first position close to each other to a second position far apart from each other, the projection of the drive roller 25 in the X direction and the projection of the support plate 332 in the X direction no longer overlap. This makes the conveying assembly 2 (including the first transmission rod 23, the second transmission rod 24, and several drive rollers 25) not hinder the product 8 from moving in the Z direction with the material frame 3 in the baking space 113. This allows the staff to flexibly adjust the position and height of the material frame 3 in the baking space 113 according to the baking requirements, and to realize the transfer of the product 8 between the material frame 3 and the conveying assembly 2.

[0094] In this embodiment, external conveying components are respectively provided on both sides of the furnace body 1 along the X direction, for conveying the product 8 to the feeding end 21 or sending the baked product 8 out from the discharging end 22; to prevent the conveying component outside the furnace body 1 from conveying the product 8 to the feeding end 21 when the conveying component 2 is in the clearance position, a baffle cylinder 6 (such as...) can be provided at the feeding end 21. Figure 1 As shown), the extension and retraction of the baffle cylinder 6 and the switching between the transfer position and the avoidance position of the conveying component 2 work in coordination. For example, when the conveying component 2 is in the avoidance position, the baffle cylinder 6 is controlled to extend to block the external conveying component from conveying the product 8 to the feeding end 21, so as to prevent the product 8 from falling. When the conveying component 2 is in the transfer position, the baffle cylinder 6 is controlled to retract, so as not to hinder the conveying component from conveying the product 8 to be baked to the feeding end 21. In this embodiment, the baffle cylinder 6 is provided as a safety guarantee for the operation of the multi-layer tunnel oven 100 in this application.

[0095] ReferenceFigure 11 , Figure 13 As shown, in one embodiment of the present invention, the multi-layer tunnel oven 100 further includes an adjusting block 12 movably connected to the oven body 1 along the Y direction; one of the first transmission rod 23 and the second transmission rod 24 is movably connected to the adjusting block 12 along the Y direction, so as to have a first position and a second position on the adjusting block 12; for example, an adjusting motor 121 is fixedly installed inside the oven body 1 and in the space outside the baking oven 11, and the output shaft of the adjusting motor 121 coaxially drives an adjusting screw 122 rotatably installed inside the oven body 1. The adjusting screw 122 passes through the adjusting block 12 and is threadedly assembled with the adjusting block 12. When the adjusting motor 121 is started, the adjusting screw 122 and the adjusting block 12 are connected to the adjusting block 12. The cooperation of block 12 enables the adjustment block 12 to move along the Y direction within the oven body 1, thereby adjusting the distance and width between the first transmission rod 23 and the second transmission rod 24 to accommodate the baking requirements of products 8 with different widths. For example, in this embodiment, it is only necessary to move one of the first transmission rod 23 and the second transmission rod 24 to the adjustment block 12 to adjust the width of the conveying component 2, without having to move both the first transmission rod 23 and the second transmission rod 24 along the Y direction. In this case, the telescopic cylinder 7 used to drive the first transmission rod 23 or the second transmission rod 24 to move between the first position and the second position should also be fixed on the adjustment block 12.

[0096] In this embodiment, in order to accommodate the adjustment of the width of the conveying component 2, the width of the material frame 3 along the Y direction also needs to be set to an adjustable state; such as Figure 8 , Figure 9 As shown, a guide member 51 extending along the Y direction is provided between the two lifting frames 5. Multiple guide members 51 are provided, with one end of each guide member 51 fixedly connected to one of the lifting frames 5 and the other end fixedly connected to the other lifting frame 5. When the first transmission rod 23 is moved along the Y direction and connected to the adjusting block 12, the first support frame 31 is slidably assembled onto the guide member 51 along the Y direction. When the second transmission rod 24 is moved along the Y direction and connected to the adjusting block 12, the second support frame 32 is slidably assembled onto the guide member 51 along the Y direction. This achieves the desired effect when the conveying assembly 2 is moved along the Y direction... When adjusting the width of the conveyor assembly 2, the width of the material frame 3 along the Y direction should be adjusted simultaneously to accommodate the baking requirements of products 8 with different widths. It should be noted that the adjustment amount of the width of the conveyor assembly 2 along the Y direction should be consistent with the adjustment amount of the width of the material frame 3 along the Y direction. This is to ensure that when the first transmission rod 23 or the second transmission rod 24 is in the first position or the second position, the relative positional relationship between its projection on the furnace body 1 along the X direction and the projection of the support plate 332 on the furnace body 1 along the X direction will not change, thus ensuring that the product 8 can be transferred normally between the conveyor assembly 2 and the material frame 3.

[0097] Reference Figure 11 , Figure 12As shown, in an embodiment of the present application, the first transmission rod 23 is movably connected to the adjusting block 12, the first carrier frame 31 and the guide 51, and the embodiment of the present application provides an implementation that can synchronously drive the first carrier frame 31 to adjust the position along the Y direction when the first transmission rod 23 moves relative to the adjusting block 12 along the Y direction, and further realizes that the width of the conveying assembly 2 and the width of the material frame 3 can be synchronously adjusted, which is as follows.

[0098] The driving block 231 is provided on the first transmission rod 23 (the driving block 231 is located on the side of the first transmission rod 23 away from the second transmission rod 24, so as not to affect the movement of the product 8 along the Z direction with the material frame 3), and the stoppers 232 are arranged on one side and / or the other side of the driving block 231 along the X direction, two stoppers 232 are arranged on the same side of the driving block 231 along the X direction, and the two stoppers 232 are arranged along the Y direction. Figure 9 As shown, the driving rod 311 extending along the Z direction is connected to the first carrier frame 31, the upper and lower ends of the driving rod 311 are respectively fixedly installed on the two first rod bodies arranged along the Z direction, and the driving rod 311 is arranged between the two stoppers 232 on the same side along the Z direction; when the first transmission rod 23 and the second transmission rod 24 are both in the first position, the stopper 232 on the side away from the placement space abuts against the side wall of the driving rod 311, and when the first transmission rod 23 and the second transmission rod 24 are in the first position, the stopper 232 on the side close to the placement space abuts against the side wall of the driving rod 311, so that the arrangement of the driving rod 311 does not hinder the movement of the first transmission rod 23 between the first position and the second position.

[0099] When it is necessary to adjust the width of the conveying assembly 2 and the material frame 3 along the Y direction, when it is necessary to widen the width of the conveying assembly 2; first, the first transmission rod 23 is controlled to move from the first position to the second position, so that the stopper 232 on the side close to the placement space abuts against the side wall of the driving rod 311, and then the adjusting motor 121 is controlled to start and drive the adjusting block 12 to move along the Y direction through the adjusting screw 122, thereby driving the first transmission rod 23 to move along the Y direction away from the second transmission rod 24, and since the stopper 232 on the side close to the placement space abuts against the side wall of the driving rod 311 at this time, the first carrier frame 31 movably arranged on the guide 51 can be synchronously driven to move along the Y direction away from the second carrier frame 32 through the cooperation of the stopper 232 and the driving rod 311, thereby realizing the adjustment of the width of the conveying assembly 2 and the synchronous adjustment of the width of the material frame 3.

[0100] When it is needed to narrow the width of the conveying assembly 2, first control the first transmission rod 23 to move from the second position to the first position, so that the blocking piece 232 far away from the placing space side and the driving rod 311 side wall abut, then control the adjusting motor 121 to start and drive the adjusting screw 122 to rotate in the reverse direction, and drive the first transmission rod 23 to move towards the second transmission rod 24, thereby realizing the synchronous driving of the first bearing frame 31 towards the second bearing frame 32.

[0101] In the embodiment, since the material frame 3 is arranged to move in the Z direction, the first bearing frame 31 also needs to move in the Z direction with the material frame 3. In order to reduce the friction between the blocking piece 232 and the driving rod 311 side wall when the first bearing frame 31 moves in the Z direction with the material frame 3, in the embodiment, the blocking piece 232 can be arranged as a rotating piece rotatably arranged on the driving block 231. The rotating piece can be a bearing or a wheel (the wheel is rotatably arranged on the driving block 231 through the bearing), so that the sliding friction between the blocking piece 232 and the driving rod 311 side wall is changed into rolling friction, thereby greatly reducing the frictional resistance of the first bearing frame during the movement of the material frame 3 in the Z direction, and also avoiding excessive wear between the driving rod 311 and the blocking piece 232.

[0102] Referring to Figure 3 As shown in the figure, in an embodiment of the present application, the baking oven 11 is respectively provided with a filtering assembly 13 on both sides in the Y direction. The filtering assembly 13 is a high-efficiency filter, which is used to filter the dust, microorganisms and other pollutants in the air conveyed into the baking oven 11, so as to provide a clean baking environment for the product 8. This is particularly important for some dispensing products 8 with high cleanliness requirements. The baking assembly 4 conveys clean hot air to the baking space 113 through the filtering assembly 13, which is used to bake the product 8.

[0103] As shown in the figure Figure 1 , Figure 2 , Figure 3 As shown in the figure, the multi-layer tunnel furnace 100 further comprises a conveying air hole 14, which is arranged above the furnace body 1. Since the upper position of the baking oven 11 is almost not contacted by people, the upper end of the outer shell 16 can be arranged in an open state, and the conveying air hole 14 is arranged on the top wall of the inner shell 17, which is helpful to make the external air enter the area between the inner shell 17 and the baking oven 11 under the action of the baking assembly 4.

[0104] Referring to Figure 3 As shown in the figure, in an embodiment of the present application, the filtering assembly 13 and the inner shell 17 are arranged at intervals along the side wall in the Y direction, so that the interval therebetween forms an air supply channel 15; as Figure 4As shown, the baking assembly 4 comprises: two air supply fans 41 (consisting of a motor and an impeller), which are arranged above the baking oven 11 in the furnace body 1; the air supply fan 41 further comprises a volute 411 arranged outside the impeller, wherein the volute 411 is provided with an air outlet 4111 on the peripheral wall, and the air outlet 4111 on one volute 411 is arranged towards the air supply channel 15 on one side of the Y direction, and the air outlet 4111 on the other volute 411 is arranged towards the air supply channel 15 on the other side of the Y direction; in this embodiment, a hole is arranged through the bottom wall of the volute 411, when the impeller rotates rapidly under the action of the motor, the gas is sucked into the volute 411 through the hole in the bottom wall of the volute 411 and is pressurized by the impeller, and is guided outwards by the air outlet 4111 and is transported into the two air supply channels 15 respectively; as shown, Figure 3 As shown, a heater 42 is arranged on the path of the gas flow moving towards the air supply channel 15, for heating the flowing gas to a predetermined temperature range, Figure 3 As shown by the dotted arrows, under the action of the air supply fan 41, the gas flows through the heater 42, the air supply channel 15 and the filter assembly 13 in turn, and enters the baking space 113, for baking the product 8 in the baking space 113.

[0105] As shown in Figure 4 In an embodiment of the present application, a ventilation plate 111 is arranged on the top wall of the baking oven 11, which is used to communicate the baking space 113 and the space in the furnace body 1; the air supply fan 41 is arranged at a position corresponding to the ventilation plate 111, as shown, Figure 5 As shown, the hole arranged on the bottom wall of the volute 411 corresponds to the position of the ventilation plate 111, as shown, Figure 3 As shown, when the gas with high temperature is continuously transported into the baking space 113, the air pressure in the baking space 113 increases, so that part of the gas is discharged outwards from the ventilation plate 111 on the top wall of the baking oven 11, and the part of the gas is sucked into the volute 411 under the action of the impeller, and is further pressurized in the volute 411, and is finally discharged outwards from the air outlet 4111 and moves towards the air supply channel 15; since the part of the gas discharged from the ventilation plate 111 has a high temperature, the heat carried by the part of the gas can be secondarily heated and utilized, which improves the utilization rate of heat energy and helps to reduce the consumption of energy.

[0106] When the air pressure in the baking space 113 and the space in the inner shell 17 is too large, at this time the air supply hole 14 arranged on the top wall of the inner shell 17 also bears the function of discharging air outwards, so that the air pressure in the furnace body 1 is maintained in a dynamic balance state.

[0107] In the present application, the movement of the conveying assembly 2 between the transfer position and the avoiding position, the lifting movement of the material frame 3 in the Z direction, the extension and retraction action of the material blocking cylinder 6, and the movement process between each component are all controlled by the central controller. The above-mentioned components work cooperatively under the control of the central controller to ensure the realization of the baking operation of the product 8.

[0108] The embodiment of the present application also provides a tunnel baking line comprising at least two multilayer tunnel furnaces 100 as in the above-mentioned embodiments. Since the tunnel baking line adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The at least two multilayer tunnel furnaces 100 are arranged in sequence, and different multilayer tunnel furnaces 100 are used to provide different temperature zones to perform baking operations on the product 8 in different temperature zones. In order to realize the transfer of the product 8 between different multilayer tunnel furnaces 100, the feeding end 21 of one of the adjacent two multilayer tunnel furnaces 100 and the discharging end 22 of the other are spliced and connected, so as to realize the transfer of the product 8 between different multilayer tunnel furnaces 100.

[0109] The above-mentioned is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like under the technical concept of the present application, using the content of the present application specification and drawings, are all included in the patent protection scope of the present application.

Claims

1. A multi-layer tunnel furnace having X, Y and Z directions which intersect two by two, characterized in that, The application relates to a multi-layer tunnel oven. The oven body is internally provided with a baking oven with a baking space for baking products. A conveying assembly is arranged in the baking space and extends along the X direction, and the two ends of the conveying assembly extend out of the oven body along the X direction to form an inlet end and an outlet end at the two ends of the oven body. A material frame is arranged in the baking space and moves along the Z direction, and the material frame is sequentially provided with a plurality of placing spaces for placing the products along the Z direction. A baking assembly is arranged in the oven body and is used for baking the products. The conveying assembly has a transfer position and an avoiding position. The conveying assembly includes a first transmission rod and a second transmission rod which are arranged along the Y direction. The oven body includes an outer shell and an inner shell, and the inner shell is arranged on the inner side of the outer shell. The baking assembly includes an air supply fan, and air flows into the baking space through the air supply channel and the filtering assembly under the action of the air supply fan. ​ 2. The multi-tiered tunnel furnace of claim 1, wherein, The first transmission rod and the second transmission rod are in the first position to make the conveying assembly in the transfer position, and the first transmission rod and the second transmission rod are in the second position to make the conveying assembly in the avoiding position. The first transmission rod and the second transmission rod are respectively provided with a plurality of driving rollers arranged along the X direction on one side thereof, and the rotation axes of the driving rollers extend along the Y direction.

3. The multi-tiered tunnel furnace of claim 2, wherein, The first bearing frame and the second bearing frame are arranged along the Y direction, and the first bearing frame is arranged near the first transmission rod, and the second bearing frame is arranged near the second transmission rod. And The first bearing frame and the second bearing frame are respectively provided with a supporting member on one side thereof, and a plurality of placing spaces are formed between the two supporting members; in the Z direction, the projections of the two supporting members on the furnace body are located between the projections of the first transmission rod and the second transmission rod on the furnace body.

4. The multi-tiered tunnel furnace of claim 3, wherein, The supporting member comprises a plurality of bearing rods extending along the Z direction, and the bearing rods are arranged along the X direction. And A supporting plate is connected to the bearing rods on the side thereof facing the placing spaces, and the supporting plate has a plurality of supporting plates arranged along the Z direction on the bearing rods; the placing spaces are formed between adjacent supporting plates in the Z direction. In the X direction, the projection of the supporting plate on the furnace body is a1, and the projection of the driving roller on the furnace body is a2; when the conveying assembly is in the transfer position, the a1 is at least partially located inside the a2; when the conveying assembly is in the avoiding position, the a1 is located outside the a2.

5. The multi-tiered tunnel furnace of claim 3, wherein, The first transmission rod is movably connected to the adjusting block along the Y direction to have the first position and the second position on the adjusting block.

6. The multi-tiered tunnel furnace of any one of claims 1-5, wherein, The baking assembly conveys hot air to the baking space through the filtering assembly for baking the products; The multilayer tunnel furnace further comprises a conveying air hole arranged above the furnace body for connecting the outside with the space inside the furnace body.

7. The multi-tiered tunnel furnace of claim 6, wherein, The air supply fan is arranged inside the furnace body and above the baking oven, and is used for conveying air flow to the air supply channel and entering the baking space through the filtering assembly. And A heater is arranged above the air supply channel, and is used for heating the air flow generated by the air supply fan.

8. The multi-tiered tunnel furnace of claim 7, wherein, The top wall of the baking oven is provided with a ventilation plate for connecting the baking space with the space inside the furnace body. The air supply fan is arranged at a position corresponding to the ventilation plate to draw air in the baking space out through the ventilation plate and convey the air to the air supply channel again.

9. A tunnel oven line, characterized in that The multilayer tunnel furnace comprises at least two multilayer tunnel furnaces as claimed in any one of claims 1-8, and the at least two multilayer tunnel furnaces are arranged in sequence. The feeding end of one of the adjacent two multilayer tunnel furnaces is connected to the discharging end of the other.

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