A 2650 bore cannon
By improving the structure of the 2650 bore tube, adopting a design with large and small fire zones, and combining it with a locking threaded connection, the problems of time-consuming and labor-intensive installation and poor baking effect have been solved, achieving convenient installation and improved baking effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG XIYI INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-05-29
AI Technical Summary
The existing 2650 internal fire tube structure design is unreasonable, resulting in time-consuming and labor-intensive installation and poor baking effect.
A fire tube consisting of a tube body and a plug has been designed. The tube body is a cylindrical structure with openings at both ends, and is equipped with a fire inlet and a locking thread. The tube body has a large fire zone and a small fire zone, and a recessed groove is opened in the flat area. The fire outlet is connected to the fire inlet. The design of large and small fire zones is used to improve the baking effect. It is detachably connected to the fire source through the locking thread, which saves time and effort during installation.
The design achieves a simple structure for the fire tube, facilitating installation, improving baking results, making the installation process more efficient, and significantly enhancing the baking effect.
Smart Images

Figure CN224302086U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire tube technology, specifically a 2650 bore fire tube. Background Technology
[0002] Baking trays are essential in cake and bread production. These trays are typically transported by conveyor belts and baked inside a tunnel oven. Equipment manufacturers usually install conveyor shelves on the oven to simultaneously transport the trays and bake the food. To achieve this baking process, fire tubes are often installed inside the tunnel oven. The flames emitted from these fire tubes directly contact the trays on the conveyor shelves, baking the food within.
[0003] There are many types of tunnel ovens, with the 3300 and 2650 models being the most common. The 2650 model, being smaller in size, is particularly popular. The internal fire tube of the 2650 is a crucial component of this tunnel oven. However, the existing design of the 2650 internal fire tube is flawed, making installation inconvenient, time-consuming, and labor-intensive. Furthermore, the flames emitted from the fire tube do not provide effective baking. To address these issues, the inventor has improved the structure of the 2650 internal fire tube. Utility Model Content
[0004] The purpose of this utility model is to provide a 2650 internal fire tube, which has the advantages of simple structure, reasonable design, convenient installation for users, saving time and effort during installation, and good baking effect by adopting the design of large and small fire zones, thus solving the problems mentioned in the above technical background.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a 2650 bore fire tube, which includes a tube body and a plug. The tube body is a cylindrical structure with openings at both ends and a hollow interior. The plug is located at any one end of the tube body and seals one end of the tube body. An inlet hole is formed on the tube body at the end away from the plug. A locking thread is provided on the tube body at the end of the inlet hole, and a smooth planar area is formed on the upper end face of the tube body. A recessed groove is formed along the length of the planar area, and a large fire zone and a small fire zone are formed in the recessed groove. An outlet hole is formed in both the large fire zone and the small fire zone, and the outlet hole is connected to the interior of the tube body.
[0006] Preferably, the pipe body is a steel pipe, and an installation hole is provided on the end of the pipe body near the fire inlet. There are two installation holes, which are symmetrically distributed about the central axis of the planar area.
[0007] Preferably, the depth of the sinking trough is between 1.8 mm and 2 mm.
[0008] Preferably, multiple flame outlets are provided, and the multiple flame outlets are evenly distributed in the large fire zone and the small fire zone, and the inner diameter of each flame outlet is between 1.5mm and 2mm.
[0009] Preferably, the width of the planar region is between 5mm and 15mm.
[0010] Preferably, the density of the fire outlets in the large fire zone is greater than the density of the fire outlets in the small fire zone.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] 1. This utility model provides a 2650 internal fire tube, which includes a tube body and a plug. The tube body is a hollow cylindrical structure with openings at both ends. The plug is located at any one end of the tube body and seals one end of the tube body. A fire inlet is formed at the other end of the tube body. The overall structure is simple and reasonably designed. A recessed groove is provided on the tube body, and a large fire zone and a small fire zone are set in the recessed groove. Both the large fire zone and the small fire zone are provided with fire outlet holes. The fire outlet holes are connected to the fire inlet holes through the tube body. In this way, the flame from the fire inlet holes can be discharged through the fire outlet holes in the large fire zone and the small fire zone to directly bake the baking tray. The design of large fire zone and small fire zone makes the baking effect better.
[0013] 2. This utility model has a smooth flat area formed on the upper end face of the tube body, and a recessed groove is formed on the flat area along its length. By setting a locking thread on the tube body at one end of the fire inlet hole, the locking thread can be detachably connected to the fire source outlet during installation. The flat area contacts the inner cavity of the 2650 tunnel furnace and is fixed to the inner cavity of the tunnel furnace through the mounting hole, which saves time and effort during installation. Attached Figure Description
[0014] Figure 1 This is an overall structural diagram of the present invention;
[0015] Figure 2 This utility model Figure 1 A magnified view of A in the middle.
[0016] The reference numerals and names in the figure are as follows:
[0017] 1. Pipe body; 11. Sinking groove; 12. Flame outlet; 13. Flat area; 14. Mounting hole; 15. High flame zone; 16. Low flame zone; 2. Plug; 3. Flame inlet hole; 4. Locking thread. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] In the description of the embodiments of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.
[0020] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0021] Please see Figure 1 and Figure 2This utility model provides an embodiment of a 2650 bore fire tube, which includes a tube body 1 and a plug 2. The tube body 1 is a steel pipe and is a hollow cylindrical structure with openings at both ends. The plug 2 is located at any one end of the tube body 1 and seals one end of the tube body 1. A fire inlet 3 is formed on the tube body 1 at the end away from the plug 2. A locking thread 4 is provided on the tube body 1 at one end of the fire inlet 3. During installation, the locking thread 4 is detachably connected to the fire source to prevent the fire inlet from being blocked. To prevent fire leakage at the connection of 3, the locking thread 4 is made tighter and longer in the design to reduce the gap between the fire inlet 3 and the fire source connector and prevent fire leakage. The upper end face of the tube body 1 has a smooth flat area 13. A recessed groove 11 is formed on the flat area 13 along its length. A large fire area 15 and a small fire area 16 are formed in the recessed groove 11. Fire outlet holes 12 are formed in both the large fire area 15 and the small fire area 16. The fire outlet holes 12 are connected to the inside of the tube body 1.
[0022] Specifically, the tube body 1 is a steel pipe, and an installation hole 14 is provided on the tube body 1 near the fire inlet hole 3. There are two installation holes 14, which are symmetrically distributed about the central axis of the plane area 13. During installation, the tube body 1 is installed in the inner chamber of the 2650 tunnel furnace through the installation holes 14 and screws (not shown in the figure).
[0023] Specifically, the depth of the sinking trough 11 is between 1.8 mm and 2 mm.
[0024] Specifically, multiple flame outlet holes 12 are provided, and the multiple flame outlet holes 12 are evenly distributed in the large fire zone 15 and the small fire zone 16. The inner diameter of each flame outlet hole 12 is between 1.5mm and 2mm.
[0025] Specifically, the width of the planar region 13 is between 5mm and 15mm.
[0026] Specifically, the density value of the fire outlet holes 12 in the large fire zone 15 is greater than the density value of the fire outlet holes 12 in the small fire zone 16.
[0027] Please refer to it again. Figure 1 and Figure 2In this invention, the 2650-bore fire tube is installed by placing the flat area 13 on the tube body 1 into contact with the 2650 bore. The flat area 13 increases the contact area between the tube body 1 and the 2650 bore, resulting in greater stability after installation. The tube body 1 is then fixed to the 2650 bore using the mounting holes 14 and screws (not shown in the figure). During use, the locking thread 4 is connected to the fire source (not shown in the figure), allowing the flame to enter the tube body 1 through the fire inlet 3 and exit through the fire outlets 12 on the large fire zone 15 and small fire zone 16 to bake the baking tray (not shown in the figure). It should be noted that the fire source in this embodiment can be a natural gas fire source or a liquefied petroleum gas fire source.
[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A 2650 bore fire tube, characterized in that: The device includes a tube body (1) and a plug (2). The tube body (1) is a cylindrical structure with openings at both ends and a hollow interior. The plug (2) is located at any one end of the tube body (1) and seals one of the ends of the tube body (1). A fire inlet hole (3) is formed on the tube body (1) at the end away from the plug (2). A locking thread (4) is provided on the tube body (1) at the end of the fire inlet hole (3). A smooth flat area (13) is formed on the upper end face of the tube body (1). A recessed groove (11) is formed along the length of the flat area (13). A large fire area (15) and a small fire area (16) are formed in the recessed groove (11). A fire outlet hole (12) is provided in both the large fire area (15) and the small fire area (16). The fire outlet hole (12) is connected to the interior of the tube body (1).
2. The 2650 bore fire tube according to claim 1, characterized in that: The pipe body (1) is a steel pipe, and an installation hole (14) is provided on the end of the pipe body (1) near the fire inlet (3). There are two installation holes (14), and the two installation holes (14) are symmetrically distributed about the central axis of the plane area (13).
3. The 2650 bore fire tube according to claim 1, characterized in that: The depth of the sinking trough (11) is between 1.8 mm and 2 mm.
4. A 2650 bore fire tube according to claim 1, characterized in that: The fire outlet (12) is provided in multiple ways, and the multiple fire outlets (12) are evenly distributed in the large fire zone (15) and the small fire zone (16). The inner diameter of each fire outlet (12) is between 1.5mm and 2mm.
5. A 2650 bore fire tube according to claim 1, characterized in that: The width of the planar area (13) is between 5mm and 15mm.
6. A 2650 bore fire tube according to claim 1, characterized in that: The density value of the fire outlet (12) in the large fire zone (15) is greater than the density value of the fire outlet (12) in the small fire zone (16).