Tunnel furnace for baking pizza

Abstract

The invention relates to the technical field of food processing, in particular to a tunnel furnace for baking pizza, a furnace body and a conveying system.The conveying system comprises a driving unit, two transmission mechanisms and two conveying chains, the two transmission mechanisms are located at the two opposite ends outside the furnace body respectively, and the driving unit is arranged on a support outside the furnace body; the driving mechanism is used for driving the transmission mechanism to drive the two conveying chains to transmit in the furnace body in the length direction of the furnace body, a pizza stone plate is connected between the two conveying chains, each conveying chain is provided with a connecting part, a supporting seat is connected between the two connecting parts, the pizza stone plate is arranged on the supporting seat, and connecting seats are arranged at the two opposite ends of the supporting seat. An accommodating groove is formed between the connecting seat and the upper surface of the supporting seat, two opposite ends of the pizza stone plate are provided with inserting parts, and the two inserting parts are respectively matched with the two accommodating grooves in an inserting manner; in the containing groove, a compensation gap is further formed between the inserting part and the connecting base so as to be used for preventing the pizza stone plate from being broken due to asynchronous transmission of the two conveying chains.

Description

Technical Field

[0001] The invention relates to the technical field of food processing, and in particular to a tunnel oven for baking pizza. Background Art

[0002] Tunnel oven (food processing type) is a tunnel-type mechanical equipment that bakes food through heat conduction, convection and radiation. There is a continuously running conveying system in the tunnel. When baking food, the relative movement between the conveying chain plate or steel belt or mesh belt and the electric heating element or direct-fired combustion rod is generated to complete the uniform baking and transportation of food. This type of oven can produce continuously, with high production efficiency and stable baking quality.

[0003] However, the existing tunnel ovens can usually only be used for baking foods such as biscuits, bread and cakes, but cannot be used for baking pizza. This is because when baking foods such as biscuits, bread and cakes, the conveying system of the tunnel oven can use conveyor chain plates or steel belts or mesh belts as conveying units, while when baking pizza, considering the taste of pizza, it is usually necessary to use a pizza stone to carry the pizza and transfer heat. If the tunnel oven is used to bake pizza, it is necessary to connect the two ends of the pizza stone to two conveyor chains respectively, and the conveyor chains drive the pizza stone to convey the pizza in the tunnel oven, so that the pizza stone is used as the conveying unit of the pizza to complete the pizza conveying work. However, the problem of pizza stone breakage is prone to occur in this way. The reasons are as follows: when the conveyor chain is in the tunnel oven due to uneven temperature distribution in the furnace body, the two conveyor chains will be heated to different degrees, resulting in differences in thermal expansion and contraction of the two conveyor chains, which in turn affects the asynchronous transmission of the two conveyor chains. The asynchronous transmission of the two conveyor chains will cause the pizza stone to be pulled, thereby causing the pizza stone to break.

[0004] Therefore, in the prior art, pizza can usually only be baked in a pizza oven, but the pizza oven does not have the high production efficiency of a tunnel oven, nor does it have the stable baking quality of a tunnel oven.

[0005] Based on this, it is urgent to propose a tunnel oven that can be used for baking pizza. Summary of the invention

[0006] One of the purposes of the present invention is to provide a tunnel oven for baking pizza, which aims to solve the technical problem that the two conveyor chains mentioned above are not transmitted synchronously due to the difference in thermal expansion and contraction in the furnace body of the tunnel oven, resulting in the pizza stone being pulled and broken.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A tunnel oven for baking pizza, comprising an oven body and a conveying system, wherein the conveying system comprises a driving unit, two transmission mechanisms and two conveying chains, wherein the two transmission mechanisms are respectively arranged on a front bracket and a rear bracket at opposite ends outside the oven body, wherein the driving unit is arranged on the rear bracket, and is used to drive the transmission mechanism to drive the two conveying chains to transmit in the oven body along the length direction of the oven body, wherein a pizza stone is connected between the two conveying chains, wherein a connecting portion is arranged on each of the conveying chains, and a supporting seat is connected between the two connecting portions, wherein the pizza stone is placed on the supporting seat, and wherein the pizza stone is placed on the supporting seat. Connecting seats are provided at the opposite ends of the support seat, and a receiving groove is formed between the connecting seat and the upper surface of the support seat. Inserting parts are provided at the opposite ends of the pizza stone, and the two inserting parts are respectively plugged into and matched with the two receiving grooves to limit the freedom of the pizza stone in the horizontal and vertical directions; in the receiving groove, a compensation gap is also provided between the inserting part and the connecting seat, and the compensation gap is used to prevent the two conveying chains from being driven asynchronously due to the difference in thermal expansion and contraction in the furnace body, so as to cause the pizza stone to be pulled and broken.

[0009] Furthermore, the connecting seat includes a mounting portion, an inverted L-shaped extension portion and two enclosing portions, the mounting portion is connected and fixed to the support seat, the inverted L-shaped extension portion includes a vertical extension portion and a horizontal extension portion, one end of the vertical extension portion is connected and fixed to the mounting portion along the vertical direction of the furnace body, one end of the horizontal extension portion along the width direction of the furnace body is connected and fixed to the other end of the vertical extension portion, the two enclosing portions are respectively connected to the two sides of the horizontal extension portion along the length direction of the furnace body, a gap is provided between each of the enclosing portions and the vertical extension portion, and the inverted L-shaped extension portion, the two enclosing portions and the upper surface of the support seat enclose the accommodating groove.

[0010] Furthermore, within the furnace body, the upper area of ​​the pizza stone is set as a far-infrared radiation area, and the far-infrared radiation area is provided with a far-infrared heater for heating the pizza conveyed on the pizza stone; the lower area of ​​the pizza stone is set as an open flame combustion area, and the open flame combustion area is provided with an open flame combustion tube for heating the pizza conveyed on the pizza stone.

[0011] Furthermore, a plurality of groups of waist-shaped grooves are provided on the bottom surface of the support seat, and each group of waist-shaped grooves runs through the upper and lower surfaces of the support seat. Two adjacent groups of waist-shaped grooves are arranged as a first group of waist-shaped grooves and a second group of waist-shaped grooves. The waist-shaped grooves of the first group of waist-shaped grooves and the waist-shaped grooves of the second group of waist-shaped grooves are staggered and have different numbers.

[0012] Furthermore, there are multiple pizza stones, which are laid along the length direction of the furnace body, there are multiple support seats, which correspond one-to-one to the multiple pizza stones, there are multiple connecting parts on each conveying chain and multiple connecting seats on each support seat, the connecting parts on each conveying chain correspond one-to-one to the multiple pizza stones, and the connecting seats on each support seat correspond one-to-one to the multiple pizza stones.

[0013] Furthermore, the support seat is provided with reinforcing parts which are bent at both sides along the length direction of the furnace body.

[0014] Further, a compensation gap between the plug-in portion and the connection seat in the length direction of the furnace body and / or the width direction of the furnace body is set to D1, and the relationship satisfied by D1 is: 1≤D1≤2mm.

[0015] Furthermore, a compensation gap between the upper surface of the plug-in portion and the connecting seat in the vertical direction of the furnace body is set to D2, and the relationship satisfied by D2 is: 1≤D1≤2mm.

[0016] Furthermore, the transmission mechanism includes two seat bearings and a rotating shaft, and the two ends of the rotating shaft are respectively rotatably connected to the two seat bearings, and chain disks are also fixed on the two ends of the rotating shaft, and the two ends of the conveying chain are respectively transmission-connected with the chain disk on one rotating shaft and the chain disk on the other rotating shaft; wherein, the seat bearing on one transmission mechanism is slidably connected to a guide rail arranged on the front bracket, and the guide rail extends along the length direction of the furnace body, and the seat bearing on the other transmission mechanism is fixedly connected to the rear bracket, and an elastic unit is connected between the seat bearing slidably connected to the guide rail and the end surface of the furnace body facing the guide rail, and the telescopic direction of the elastic unit is the same as the extension direction of the guide rail.

[0017] Furthermore, a surface of one of the conveying chains facing the other conveying chain is set as a connecting surface, each of the connecting parts is arranged on the connecting surface of each of the conveying chains, and the connecting part is integrally connected to the connecting surface.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] When the tunnel oven for baking pizza of the present invention is in use, the pizza stone is supported by the support seat, and the opposite ends of the pizza stone are plugged and matched with the receiving grooves on the support seat through the plug-in portion, thereby limiting the freedom of the pizza stone in the horizontal and vertical directions. Based on this, the pizza to be baked is placed on the pizza stone, and the driving unit drives the transmission mechanism to drive the conveying chain in the furnace body along the length direction of the furnace body, thereby driving the pizza stone to be conveyed in the furnace body along the length direction of the furnace body; when the conveying chains are subjected to different degrees of heating due to uneven temperature distribution in the furnace body, resulting in differences in thermal expansion and contraction, thereby causing the two conveying chains to be driven asynchronously, the compensation gap between the plug-in portion and the connecting seat compensates for the asynchronous transmission of the two conveying chains due to the difference in thermal expansion and contraction, that is, the compensation gap allows the plug-in portion of the pizza stone to have a small movable space in the receiving groove, even if the two conveying chains are driven asynchronously due to the difference in thermal expansion and contraction, the pizza stone will not be pulled, thereby preventing the pizza stone from being broken due to the asynchronous transmission of the two conveying chains. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a tunnel oven for baking pizza of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the furnace body, the rear support and the front support connected in an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of a rear bracket related to an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of two conveyor chains connected to a pizza stone plate according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of a structure in which a single pizza stone is connected to two conveyor chains according to an embodiment of the present invention;

[0025] Figure 6 for Figure 5 A schematic diagram of the structure from another angle;

[0026] Figure 7 is a top view of 6;

[0027] Figure 8 This is the cross-sectional view at AA in Figure 7;

[0028] Fig. 9 for Figure 8 A schematic diagram of the enlarged structure at B in the middle;

[0029] Fig.10 for Figure 7 Sectional view at CC;

[0030] Fig.11 It is a structural schematic diagram of a connecting socket according to an embodiment of the present invention;

[0031] Fig.12 for Fig.11 A schematic diagram of the structure from another angle;

[0032] Fig.13 The present invention is a schematic diagram of the structure of a pizza stone according to an embodiment of the present invention.

[0033] Reference numerals in the accompanying drawings:

[0034] 1. Furnace body; 10. Far infrared heater; 11. Open flame combustion tube; 12. Smoke exhaust system; 13. Air intake pipe system; 2. Transmission mechanism; 20. Bearing with seat; 21. Rotating shaft; 210. Chain plate; 3. Front bracket; 30. Guide rail; 31. Elastic unit; 4. Rear bracket; 5. Conveyor chain; 50. Connecting part; 6. Support seat; 60. Reinforcement part; 61. Waist-shaped groove; 7. Connecting seat; 70. Mounting part; 71. Vertical extension part; 72. Horizontal extension part; 73. Enclosure part; 74. Gap; 8. Pizza stone; 80. Plug-in part; 9. Compensation gap; 90. Accommodation groove. DETAILED DESCRIPTION

[0035] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0036] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "width", "up", "down", "front", "back", "top" and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] Please refer to Figure 1 - Fig.13 The present invention provides a pizza baking tunnel oven, comprising an oven body 1 and a conveying system, wherein the conveying system comprises a driving unit, two transmission mechanisms 2 and two conveying chains 5, wherein the two transmission mechanisms 2 are respectively arranged on a front bracket 3 and a rear bracket 4 at opposite ends outside the oven body 1, and the driving unit is arranged on the rear bracket 4, and is used to drive the transmission mechanism 2 to drive the two conveying chains 5 to be transmitted in the oven body 1 along the length direction of the oven body 1. Specifically, the driving unit is a driving motor, and the two transmission mechanisms 2 each comprise two bearings with seats 20 and a rotating shaft 21, and in one transmission mechanism 2, the two ends of the rotating shaft 21 are respectively rotatably connected with the two bearings with seats 20, and chain discs 210 are also fixed on the two ends of the rotating shaft 21. On the basis of this structure, the output shaft of the driving motor is drivingly connected to the rotating shaft 21 on the transmission mechanism arranged on the rear bracket, and the two ends of the conveying chain 5 are respectively transmission-connected to the chain disk 210 on one rotating shaft 21 and the chain disk 210 on the other rotating shaft 21; wherein, each of the seat bearings 20 on a transmission mechanism 2 is respectively slidably connected to the two guide rails 30 slidably arranged on the front bracket 3, and the guide rails 30 extend along the length direction of the furnace body 1, and the two guide rails 30 are spaced apart along the width direction of the furnace body 1; the seat bearing 20 on the other transmission mechanism 2 is fixedly connected to the rear bracket 4, and an elastic unit 31 is connected between the seat bearing 20 slidably connected to the guide rail 30 and the end face of the furnace body 1 facing the guide rail 30, and the elastic unit 31 is selected from a spring, and the telescopic direction of the elastic unit 31 is the same as the extension direction of the guide rail 30. It can be seen that by driving a rotating shaft 21 to rotate through a driving motor, the conveyor chain 5 can be driven to be transported in the furnace body 1 along the length direction of the furnace body 1. Since the conveyor chain 5 in the furnace body 1 will be affected by the high temperature in the furnace body 1, according to the principle of thermal expansion and contraction, the conveyor chain 5 may become loose after long-term operation. Therefore, the elastic unit 31 can always keep the conveyor chain 5 in a tensioned state, thereby improving the conveying performance of the conveyor chain 5.

[0040] Based on the above structure, refer to Figure 2 , Figure 4 , Figure 5 and Fig. 9, a pizza stone 8 is connected between the two conveyor chains 5, and the pizza stone 8 extends along the width direction of the furnace body 1, that is, the opposite ends of the pizza stone 8 are respectively connected to the two conveyor chains 5. Specifically, a connecting portion 50 is provided on each conveyor chain 5, and the connecting portion 50 extends along the width direction of the furnace body 1 and is located in the spacing between the two conveyor chains 5; a support seat 6 is connected between the connecting portions 50 on the two conveyor chains 5, and the support seat 6 can be fixed to the connecting portion 50 by bolts; the pizza stone 8 is placed on the upper surface of the support seat 6, and connecting seats 7 are provided at the opposite ends of the support seat 6, and the connecting seat 7 can be fixed to the connecting portion 50 by bolts, and a receiving groove 90 is formed between the connecting seat 7 and the upper surface of the support seat 6, and plug-in portions 80 are provided at the opposite ends of the pizza stone 8, and the plug-in portion 80 is integrally connected with the pizza stone 8, and the two plug-in portions 80 on the pizza stone 8 are respectively plugged and matched with the two receiving grooves to limit the freedom of the pizza stone 8 in the horizontal and vertical directions. In addition, in the accommodating groove, a compensation gap 9 is also provided between the plug-in portion 80 and the connecting seat 7. The compensation gap 9 is mainly used to prevent the two conveying chains 5 from being asynchronously transmitted due to the difference in thermal expansion and contraction in the furnace body 1, so as to cause the pizza stone 8 to be pulled and broken.

[0041] In order to prevent the connection part 50 from affecting the transmission of the conveyor chain 5, refer to Figure 5 The surface of one conveying chain 5 facing the other conveying chain 5 is set as a connecting surface, and each connecting part 50 is arranged on the connecting surface of each conveying chain 5, and the connecting part 50 is integrally connected with the connecting surface.

[0042] In summary, it can be known that when the present invention is in use, the pizza stone 8 is supported by the support seat 6, and the opposite ends of the pizza stone 8 are plugged into and matched with the accommodating grooves 90 on the support seat 6 through the plug-in portion 80, thereby limiting the freedom of the pizza stone 8 in the horizontal and vertical directions. Based on this, the pizza to be baked is placed on the pizza stone 8, and the driving unit drives the transmission mechanism 2 to drive the conveying chain 5 in the furnace body 1 along the length direction of the furnace body 1, thereby driving the pizza stone 8 to be conveyed in the furnace body 1 along the length direction of the furnace body 1; when the conveying chain 5 is unevenly distributed due to the temperature inside the furnace body 1, resulting in the two conveying chains When the strips 5 are heated to different degrees and produce differences in thermal expansion and contraction, which leads to asynchronous transmission of the two conveying chains 5, the compensation gap 9 between the plug-in portion 80 and the connecting seat 7 compensates for the asynchronous transmission of the two conveying chains 5 caused by the difference in thermal expansion and contraction. That is, the compensation gap 9 allows the plug-in portion 80 of the pizza stone 8 to have a small space to move in the accommodating groove 90. Even if the two conveying chains 5 are asynchronously transmitted due to the difference in thermal expansion and contraction, the pizza stone 8 will not be pulled, thereby preventing the pizza stone 8 from breaking due to the asynchronous transmission of the two conveying chains 5.

[0043] Of course, the connecting seat 7 and the supporting seat 6 are both made of high temperature resistant materials.

[0044] It should be noted that the pizza stone 8 is made of cordierite, which can usually withstand high temperatures of about 1350 to 1500 degrees Celsius. This feature allows the cordierite to maintain stable physical and chemical properties in a high temperature environment and is not prone to deformation, cracking or melting. In addition, the cordierite is not easily scratched, nor is it too brittle and easy to break; the cordierite has low water absorption: this allows the cordierite to maintain good performance even in a humid environment.

[0045] In one embodiment, referring to Fig.11 , Fig.12 The connecting seat 7 includes a mounting portion 70, an inverted L-shaped extension portion and two enclosing portions 73. The mounting portion 70 is connected and fixed to the support seat 6. The inverted L-shaped extension portion includes a vertical extension portion 71 and a horizontal extension portion 72. One end of the vertical extension portion 71 is connected and fixed to the mounting portion 70 along the vertical direction of the furnace body 1, and one end of the horizontal extension portion 72 along the width direction of the furnace body 1 is connected and fixed to the other end of the vertical extension portion 71. The two enclosing portions 73 are respectively connected to both sides of the horizontal extension portion 72 along the length direction of the furnace body 1. A gap 74 is provided between each enclosing portion 73 and the vertical extension portion 71. The inverted L-shaped extension portion, the two enclosing portions 73 and the upper surface of the support seat 6 enclose the above-mentioned accommodating groove. It can be seen from this that the gap 74 between the enclosed portion 73 and the vertical extension portion 71 makes the enclosed portion 73 have a certain elastic deformation ability relative to the vertical extension portion 71. When the two conveying chains 5 are not driven synchronously and in the accommodating groove, the compensation gap 9 between the plug-in portion 80 and the connecting seat 7 in the length direction of the furnace body 1 is zero, under the condition that the enclosed portion 73 has the performance of elastic deformation, the pulling force of the pizza stone 8 will be converted into the force of the plug-in portion 80 squeezing the enclosed portion 73 along the length direction of the furnace body 1, so that the enclosed portion 73 will undergo a certain deformation, thereby preventing the pizza stone 8 from being pulled and broken.

[0046] It should be noted that, refer to Figure 2 , Figure 7 , Figure 8 and Fig.10 The compensation gap 9 between the plug-in portion 80 and the connection seat 7 in the length and / or width direction of the furnace body 1 is set to D1, and D1 satisfies the relationship: 1≤D1≤2mm. In this embodiment, D1 is set to 1mm to avoid affecting the stability of the pizza stone 8 due to D1 being too large; in other embodiments, D1 can also be set to 2mm, which can be reasonably changed according to the actual situation.

[0047] Similarly, refer to Figure 2 , Figure 7 - Fig. 9, the compensation gap 9 between the upper surface of the plug-in portion 80 and the connecting seat 7 in the vertical direction of the furnace body 1 is set to D2, and D2 satisfies the relationship: 1≤D1≤2mm. In this embodiment, D2 is set to 1mm to avoid affecting the stability of the pizza stone 8 due to D2 being too large; in other embodiments, D1 can also be set to 2mm, which can be reasonably changed according to the actual situation.

[0048] In one embodiment, referring to Figure 1 In the furnace body 1, the upper area of ​​the pizza stone 8 is set as a far-infrared radiation area, and a far-infrared heater 10 is provided in the far-infrared radiation area. The far-infrared heater 10 is a cylindrical structure, and the far-infrared heater 10 extends along the width direction of the furnace body 1. The opposite ends of the far-infrared heater 10 are respectively fixed on the opposite side walls of the furnace body 1, so as to heat the pizza conveyed on the pizza stone 8; the lower area of ​​the pizza stone 8 is set as an open flame combustion area, and an open flame combustion tube 11 is provided in the open flame combustion area. The two end leaves of the open flame combustion tube 11 are respectively fixed on the opposite side walls of the furnace body 1, so as to heat the pizza conveyed on the pizza stone 8. It can be seen that the lower fire in the furnace body 1 of the tunnel furnace of the present invention adopts an open flame tube to burn and heat the pizza on the pizza stone 8, and the upper fire adopts far-infrared radiation technology to heat the pizza on the pizza stone 8, that is, the combination of open flame and far-infrared radiation (thermal radiation) is adopted to realize the baking of pizza, so that the temperature in the furnace body 1 can be precisely controlled, wherein the lower fire in the furnace body 1 is not lower than 300°C, and the upper fire is not lower than 350°C, which is more conducive to improving the taste of the baked pizza.

[0049] Far infrared radiation baking is a technology that uses far infrared radiation for heating and baking. Far infrared has a significant thermal effect and strong penetrating power. When far infrared irradiates the surface of pizza, it can be absorbed by pizza and converted into heat energy, thereby achieving the effect of heating and baking. Since far infrared has a strong penetrating power, it can penetrate deep into the interior of an object for heating, making the heating more uniform and efficient. Therefore, baking pizza by combining open flame with far infrared radiation technology can improve the taste of pizza. In addition, how the open flame combustion tube 11 realizes the baking of food belongs to the prior art and will not be described here. Reference can be made to a tunnel furnace disclosed in the existing patent publication number CN108991050A.

[0050] To bake pizza in batches, refer to Figure 4There are multiple pizza stone slabs 8, and correspondingly, there are also multiple support seats 6, and the multiple support seats 6 correspond one-to-one to the multiple pizza stone slabs 8. There are also multiple connecting parts 50 on each conveying chain 5 and connecting seats 7 on each support seat 6. The connecting parts 50 on each conveying chain 5 correspond one-to-one to the multiple pizza stone slabs 8, and the connecting seats 7 on each support seat 6 correspond one-to-one to the multiple pizza stone slabs 8. The multiple pizza stone slabs 8 are laid along the length direction of the furnace body 1, so that the purpose of baking pizza in batches can be achieved.

[0051] In one embodiment, referring to Figure 6 , a plurality of groups of waist-shaped grooves are provided on the bottom surface of each support seat 6, and the waist-shaped grooves 61 penetrate the upper and lower surfaces of the support seat 6, and two adjacent groups of waist-shaped grooves are set as a first group of waist-shaped grooves and a second group of waist-shaped grooves, and the waist-shaped grooves 61 of the first group of waist-shaped grooves and the waist-shaped grooves 61 of the second group of waist-shaped grooves are staggered and different in number. Exemplarily, the number of waist-shaped grooves 61 of the first group of waist-shaped grooves is set to three, and the number of waist-shaped grooves 61 of the second group of waist-shaped grooves is set to two, and each waist-shaped groove 61 extends along the width direction of the furnace body 1, and in the first group of waist-shaped grooves or the second group of waist-shaped grooves, adjacent waist-shaped grooves 61 are evenly spaced along the length direction of the furnace body 1; in addition, the spacing between any two adjacent groups of waist-shaped grooves is the same. In summary, the waist-shaped groove 61 on the support seat 6 can transmit the heat of the lower fire to heat the pizza stone 8, thereby improving the heating effect of the lower fire. At the same time, the layout structure of the waist-shaped groove 61 on the support seat 6 can ensure that the strength of the support seat 6 is not greatly uneven, thereby effectively avoiding the uneven upper surface of the support seat 6 due to the uneven strength of the support seat 6, thereby causing the pizza stone 8 to be broken due to the internal stress in the vertical direction.

[0052] In order to strengthen the support base 6 , a reinforcing portion 60 is formed by bending on both sides of the support base 6 along the length direction of the furnace body 1 . The reinforcing portion 60 is used to strengthen the strength of the support base 6 to prevent the support base 6 from being deformed.

[0053] Of course, refer to Figure 1 , an air intake pipeline system 13 is also provided outside the furnace body 1, and the air intake pipeline system selects the existing air intake pipeline system, wherein the air intake pipeline system 13 includes an air pipeline and a gas pipeline, a zero-pressure solenoid valve is installed on the open flame combustion tube 11, the air pipeline is connected to the open flame combustion tube 11, and the gas pipeline is connected to the open flame combustion tube 11 through the zero-pressure solenoid valve, the air pipeline is suitable for injecting air into the open flame combustion tube 11, and the gas pipeline is suitable for injecting fuel into the open flame combustion tube 11, and the surface of the open flame combustion tube 11 is provided with a flame hole, and the flame hole faces the pizza stone 8, and the open flame combustion tube 11 is suitable for mixing the injected air and the injected fuel, igniting and spraying from the flame hole to heat the pizza stone 8. For details, reference can be made to a tunnel furnace disclosed in the existing patent publication number CN108991050A.

[0054] In addition, refer to Figure 1 or Figure 2 The furnace body 1 is also provided with a smoke exhaust system 12 for exhausting the smoke in the furnace body 1. The smoke exhaust system 12 also uses the air intake system of the existing gas tunnel furnace, which will not be described here.

[0055] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tunnel oven for baking pizza, comprising an oven body and a conveying system, wherein the conveying system comprises a driving unit, two transmission mechanisms and two conveying chains, wherein the two transmission mechanisms are respectively arranged on a front bracket and a rear bracket at opposite ends outside the oven body, and the driving unit is arranged on the rear bracket, and is used to drive the transmission mechanism to drive the two conveying chains to transmit in the oven body along the length direction of the oven body, wherein: A pizza stone is connected between the two conveyor chains, and each of the conveyor chains is provided with a connecting part, and a support seat is connected between the two connecting parts. The pizza stone is placed on the support seat, and connecting seats are provided at opposite ends of the support seat. A receiving groove is formed between the connecting seat and the upper surface of the support seat, and plug-in parts are provided at opposite ends of the pizza stone, and the two plug-in parts are respectively plugged and matched with the two receiving grooves to limit the freedom of the pizza stone in the horizontal and vertical directions; in the receiving groove, a compensation gap is also provided between the plug-in part and the connecting seat, and the compensation gap is used to prevent the two conveyor chains from being driven asynchronously due to the difference in thermal expansion and contraction in the furnace body, so as to cause the pizza stone to be pulled and broken.

2. The pizza baking tunnel oven according to claim 1, characterized in that: The connecting seat includes a mounting portion, an inverted L-shaped extension portion and two enclosing portions, the mounting portion is connected and fixed to the support seat, the inverted L-shaped extension portion includes a vertical extension portion and a horizontal extension portion, one end of the vertical extension portion is connected and fixed to the mounting portion along the vertical direction of the furnace body, one end of the horizontal extension portion along the width direction of the furnace body is connected and fixed to the other end of the vertical extension portion, the two enclosing portions are respectively connected to the two sides of the horizontal extension portion along the length direction of the furnace body, a gap is provided between each of the enclosing portions and the vertical extension portion, and the inverted L-shaped extension portion, the two enclosing portions and the upper surface of the support seat enclose the accommodating groove.

3. The pizza baking tunnel oven according to claim 1, characterized in that: In the furnace body, the upper area of ​​the pizza stone is set as a far-infrared radiation area, and the far-infrared radiation area is provided with a far-infrared heater for heating the pizza conveyed on the pizza stone; the lower area of ​​the pizza stone is set as an open flame combustion area, and the open flame combustion area is provided with an open flame combustion tube for heating the pizza conveyed on the pizza stone.

4. The pizza baking tunnel oven according to claim 1, characterized in that: A plurality of waist-shaped grooves are provided on the bottom surface of the support seat, and each group of waist-shaped grooves runs through the upper and lower surfaces of the support seat. Two adjacent groups of waist-shaped grooves are arranged as a first group of waist-shaped grooves and a second group of waist-shaped grooves. The waist-shaped grooves of the first group of waist-shaped grooves and the waist-shaped grooves of the second group of waist-shaped grooves are staggered and have different numbers.

5. The pizza baking tunnel oven according to claim 1, characterized in that: There are multiple pizza stones, which are laid along the length direction of the furnace body. There are also multiple support seats, which correspond one-to-one to the multiple pizza stones. There are also multiple connecting parts on each conveying chain and connecting seats on each support seat, which correspond one-to-one to the multiple pizza stones. The connecting parts on each conveying chain correspond one-to-one to the multiple pizza stones, and the connecting seats on each support seat correspond one-to-one to the multiple pizza stones.

6. The pizza baking tunnel oven according to claim 5, characterized in that: The support seat is bent on both sides along the length direction of the furnace body to form reinforcement parts.

7. The pizza baking tunnel oven according to claim 1, characterized in that: A compensation gap between the plug-in portion and the connection seat in the length direction of the furnace body and / or the width direction of the furnace body is set to D1, and the relationship satisfied by D1 is: 1≤D1≤2mm.

8. The pizza baking tunnel oven according to claim 1, characterized in that: A compensation gap between the upper surface of the plug-in portion and the connecting seat in the vertical direction of the furnace body is set to D2, and the relationship satisfied by D2 is: 1≤D1≤2mm.

9. The pizza baking tunnel oven according to claim 1, characterized in that: The transmission mechanism includes two seat bearings and a rotating shaft, and two ends of the rotating shaft are rotatably connected to the two seat bearings respectively, and chain disks are fixed on the two ends of the rotating shaft, and two ends of the conveying chain are respectively transmission-connected with the chain disk on one rotating shaft and the chain disk on the other rotating shaft; wherein, the seat bearing on one transmission mechanism is slidably connected to a guide rail arranged on the front bracket, and the guide rail extends along the length direction of the furnace body, and the seat bearing on the other transmission mechanism is fixedly connected to the rear bracket, and an elastic unit is connected between the seat bearing slidably connected to the guide rail and the end surface of the furnace body facing the guide rail, and the telescopic direction of the elastic unit is the same as the extension direction of the guide rail.

10. The pizza baking tunnel oven according to claim 1, characterized in that: The surface of one of the conveying chains facing the other conveying chain is set as a connecting surface, each of the connecting parts is arranged on the connecting surface of each of the conveying chains, and the connecting part is integrally connected to the connecting surface.

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