U-shaped fire tube heating device

Abstract

The utility model provides u type fire tube heating device relates to heating device technical field, including U type fire tube body, its characterized in being that U type fire tube body includes elbow pipe and two straight pipes, is equipped with spiral rod in straight pipe, is equipped with the clamping fixed structure between spiral rod and straight pipe, is equipped with the ignition structure in one end of straight pipe, and the ignition structure includes combustion box, is equipped with combustion cavity in combustion box, is equipped with the flow guide structure and mixed structure in combustion cavity, is equipped with the igniter in combustion cavity, is equipped with fixed connection structure between combustion box and straight pipe. In the utility model, install spiral rod in straight pipe, can flow guide to flue gas through spiral rod, not only can prolong the time of flue gas retention, thereby improve heat utilization rate, still can block solid impurities in flue gas through spiral rod, thereby can prevent a large number of solid impurities stickiness in elbow pipe, guarantee the heat conduction effect of U type fire tube body.

Description

Technical Field

[0001] This utility model relates to the field of heating device technology, specifically a U-shaped fire tube heating device. Background Technology

[0002] U-shaped fire tubes are generally made of high-temperature and corrosion-resistant metal materials, such as stainless steel and carbon steel. The U-shaped shape of the fire tube increases the flow path of the flame and flue gas within the tube, prolonging the heat transfer time and improving thermal efficiency. The burner mixes fuel such as oil or gas with air and ignites it, producing a high-temperature flame and flue gas. These high-temperature products flow within the U-shaped fire tube, and then the high-temperature flame and flue gas transfer heat to the heated material outside the tube through the tube wall via heat conduction. The tube wall has good thermal conductivity, enabling rapid heat transfer to the surrounding medium. However, existing flue gas often contains impurities produced by incomplete combustion. These impurities adhere to the inner wall of the fire tube, affecting its thermal conductivity. Furthermore, the special structure of the U-shaped fire tube makes cleaning more difficult, impacting the efficiency of cleaning and maintenance.

[0003] Therefore, this utility model provides a U-shaped fire tube heating device. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a U-shaped fire tube heating device to solve the problems mentioned in the background section. This invention not only extends the residence time of flue gas, thereby improving heat utilization, but also uses a spiral rod to block solid impurities in the flue gas, preventing a large amount of solid impurities from adhering to the inside of the bend and ensuring the heat conduction effect of the U-shaped fire tube body. It also ensures that air and fuel gas are fully mixed, thereby ensuring complete combustion and preventing the generation of a large amount of impurities during combustion, thus preventing impurities from accumulating in the U-shaped fire tube body, ensuring the heat conduction effect of the U-shaped fire tube body, and extending the service life of the U-shaped fire tube body.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a U-shaped fire tube heating device, comprising a U-shaped fire tube body, characterized in that the U-shaped fire tube body includes a bent tube and two straight tubes, a spiral rod is installed inside the straight tubes, a snap-fit ​​fixing structure is installed between the spiral rod and the straight tubes, an ignition structure is installed at one end of the straight tubes, the ignition structure includes a combustion box, a combustion chamber is opened inside the combustion box, a flow guiding structure and a mixing structure are installed inside the combustion chamber, an igniter is installed inside the combustion chamber, and a fixed connection structure is installed between the combustion box and the straight tubes.

[0006] Furthermore, the two ends of the bent pipe are respectively fixedly connected to two straight pipes, and the snap-fit ​​fixing structure includes multiple slots opened in the straight pipes, and a snap block is installed on the spiral rod, with the snap block corresponding to the snap slot.

[0007] Furthermore, mounting blocks are fixed at both ends of the spiral rod, and the mounting blocks are fixedly connected to the locking blocks. The locking blocks are made of elastic material, and the spiral rod is in contact with the inner wall of the straight tube.

[0008] Furthermore, the fixed connection structure includes a fixing block fixed to the straight pipe, a threaded groove inside the fixing block, a through groove on the combustion box, and a fixing bolt installed between the fixing block and the combustion box, with the fixing bolt corresponding to the threaded groove and the through groove.

[0009] Furthermore, the flow guiding structure includes a flow guiding plate fixed inside the combustion chamber. The flow guiding plate has a conical structure, and the combustion chamber is connected to a straight pipe.

[0010] Furthermore, the hybrid structure includes a fixed shaft fixed inside the combustion chamber, a rotating ring rotatably fitted on the fixed shaft, and multiple fan blades fixed around the circumference of the rotating ring.

[0011] Furthermore, a first air intake pipe and a second air intake pipe are fixed on both sides of the combustion chamber, and both the first air intake pipe and the second air intake pipe are connected to the combustion chamber. The first air intake pipe and the second air intake pipe are located on both sides of the fixed shaft.

[0012] The beneficial effects of this utility model are:

[0013] 1. Installing a spiral rod inside the straight pipe allows for the guidance of flue gas flow. This not only extends the flue gas residence time, thereby improving heat utilization, but also blocks solid impurities in the flue gas, preventing a large amount of solid impurities from adhering to the inside of the bend, ensuring the heat conduction effect of the U-shaped fire tube body, thus improving the heat exchange efficiency of the U-shaped fire tube body. Furthermore, the inner wall of the straight pipe can be cleaned when the spiral rod is pulled out, thereby improving the efficiency of cleaning and maintenance of the equipment.

[0014] 2. Installing a flow guiding structure and a mixing structure inside the combustion chamber can ensure that the air and fuel are fully mixed, thereby ensuring complete combustion, preventing the generation of a large number of impurities during combustion, thus preventing impurities from accumulating in the U-shaped fire tube body, ensuring the heat conduction effect of the U-shaped fire tube body, and extending the service life of the U-shaped fire tube body. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall assembly three-dimensional structure of the U-shaped fire tube heating device of this utility model;

[0016] Figure 2 This is a schematic diagram of the U-shaped fire tube body and the spiral rod in the U-shaped fire tube heating device of this utility model;

[0017] Figure 3 This is a schematic diagram of the overall assembly cross-sectional structure of the U-shaped fire tube heating device of this utility model;

[0018] Figure 4 for Figure 3 A schematic diagram at point A in the middle;

[0019] Figure 5 This is a schematic diagram of the assembly structure of the U-shaped fire tube body and the spiral rod in the U-shaped fire tube heating device of this utility model;

[0020] Figure 6 This is a schematic diagram of the assembly cross-sectional structure of the combustion chamber in the U-shaped fire tube heating device of this utility model;

[0021] In the diagram: 1. U-shaped fire tube body; 2. Spiral rod; 3. Mounting block; 4. Slot; 5. Locking block; 6. Fixing block; 7. Combustion box; 8. Combustion chamber; 9. Fixing bolt; 10. Sealing gasket; 11. Igniter; 12. First air intake pipe; 13. Second air intake pipe; 14. Guide plate; 15. Fixing shaft; 16. Fan blade; 17. Rotating ring; 18. Threaded groove; 19. Through groove; 20. Bend; 21. Straight pipe. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1 to 6 This utility model provides a technical solution: a U-shaped fire tube heating device, including a U-shaped fire tube body 1, characterized in that the U-shaped fire tube body 1 includes a bent tube 20 and two straight tubes 21, a spiral rod 2 is installed inside the straight tube 21, a snap-fit ​​fixing structure is installed between the spiral rod 2 and the straight tube 21, an ignition structure is installed at one end of the straight tube 21, the ignition structure includes a combustion box 7, a combustion chamber 8 is opened inside the combustion box 7, a flow guiding structure and a mixing structure are installed inside the combustion chamber 8, an igniter 11 is installed inside the combustion chamber 8, and a fixed connection structure is installed between the combustion box 7 and the straight tube 21.

[0024] In this embodiment, the two ends of the bend 20 are fixedly connected to two straight pipes 21 respectively. The snap-fit ​​fixing structure includes multiple slots 4 opened in the straight pipes 21. The spiral rod 2 is equipped with a snap block 5, which corresponds to the slot 4. Both ends of the spiral rod 2 are fixed with mounting blocks 3, which are fixedly connected to the snap blocks 5. The snap blocks 5 are made of elastic material. The spiral rod 2 is in contact with the inner wall of the straight pipe 21.

[0025] Specifically, during the air intake process, the gas flows in the direction guided by the spiral rod 2, which prolongs the time the flue gas spends inside the U-shaped fire tube body 1, allowing for sufficient heat exchange and preventing dust from adhering to the inner wall of the U-shaped fire tube body 1. When it is necessary to clean the dust, the spiral rod 2 can be pulled to separate the locking block 5 from the locking groove 4. Once the locking block 5 and the locking groove 4 are no longer engaged, the spiral rod 2 can be pulled out, thus cleaning the dust on the spiral rod 2. Furthermore, the spiral rod 2 can be used to push out the dust on the inner wall of the straight tube 21, making it convenient to clean the dust on the inner wall of the straight tube 21.

[0026] The fixed connection structure includes a fixing block 6 fixed to the straight pipe 21, a threaded groove 18 is provided in the fixing block 6, a through groove 19 is provided on the combustion box 7, a fixing bolt 9 is installed between the fixing block 6 and the combustion box 7, the fixing bolt 9 corresponds to the threaded groove 18 and the through groove 19, and a sealing gasket 10 is installed between the fixing block 6 and the combustion box 7.

[0027] Specifically, by rotating the fixing bolt 9, the fixing bolt 9 can be removed, thereby allowing the combustion chamber 7 to be directly disassembled, making the straight pipe 21 connected to the outside, and the spiral rod 2 can be taken out, thus facilitating the cleaning of soot.

[0028] The flow guiding structure includes a flow guide plate 14 fixed inside the combustion chamber 8. The flow guide plate 14 has a conical structure. The combustion chamber 8 is connected to the straight pipe 21. The mixing structure includes a fixed shaft 15 fixed inside the combustion chamber 8. A rotating ring 17 is rotatably fitted on the fixed shaft 15. Multiple fan blades 16 are fixed around the circumference of the rotating ring 17. A first air intake pipe 12 and a second air intake pipe 13 are fixed on both sides of the combustion box 7, respectively. Both the first air intake pipe 12 and the second air intake pipe 13 are connected to the combustion chamber 8. The first air intake pipe 12 and the second air intake pipe 13 are located on both sides of the fixed shaft 15, respectively.

[0029] Specifically, gas and air are introduced into the combustion chamber 8 through the first intake pipe 12 and the second intake pipe 13, causing the gas and air to drive the fan blades 16 to rotate, thus allowing the gas and air to mix. After being guided by the guide plate 14, the mixture is ignited by the igniter 11, which then produces flue gas for heating. The gas and air are fully mixed, ensuring more complete combustion, reducing smoke and dust, lowering energy loss, reducing cleaning frequency, and improving work efficiency.

[0030] Working process: Gas and air are introduced into the combustion chamber 8 through the first intake pipe 12 and the second intake pipe 13, causing the gas and air to drive the fan blade 16 to rotate, thus allowing the gas and air to mix. After being guided by the guide plate 14, the mixture is ignited by the igniter 11, and combustion occurs, forming flue gas. The flue gas enters the straight pipe 21 and then flows in the direction guided by the spiral rod 2, which prolongs the time the flue gas spends in the U-shaped fire tube body 1, thus allowing for sufficient heat exchange and blocking soot, preventing soot from sticking to the inner wall of the U-shaped fire tube body 1. When it is necessary to clean the soot, the spiral rod 2 can be pulled to separate the locking block 5 from the locking groove 4. Once the locking block 5 and the locking groove 4 are no longer engaged, the spiral rod 2 can be pulled out, allowing the soot on the spiral rod 2 to be cleaned. The spiral rod 2 can also be used to push out the soot on the inner wall of the straight pipe 21, making it convenient to clean the soot on the inner wall of the straight pipe 21.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A U-shaped fire tube heating device, comprising a U-shaped fire tube body (1), characterized in that, The U-shaped fire tube body (1) includes a bend (20) and two straight tubes (21). A spiral rod (2) is installed inside the straight tube (21). A snap-fit ​​fixing structure is installed between the spiral rod (2) and the straight tube (21). An ignition structure is installed at one end of the straight tube (21). The ignition structure includes a combustion box (7). A combustion chamber (8) is opened inside the combustion box (7). A flow guiding structure and a mixing structure are installed inside the combustion chamber (8). An igniter (11) is installed inside the combustion chamber (8). A fixed connection structure is installed between the combustion box (7) and the straight tube (21).

2. The U-shaped fire tube heating device according to claim 1, characterized in that: The two ends of the bend (20) are fixedly connected to two straight pipes (21) respectively. The snap-fit ​​fixing structure includes multiple slots (4) opened in the straight pipe (21). The spiral rod (2) is equipped with a snap block (5), and the snap block (5) corresponds to the slot (4).

3. The U-shaped fire tube heating device according to claim 2, characterized in that: Both ends of the spiral rod (2) are fixed with mounting blocks (3), the mounting blocks (3) are fixedly connected with the locking block (5), the locking block (5) is made of elastic material, and the spiral rod (2) is in contact with the inner wall of the straight tube (21).

4. The U-shaped fire tube heating device according to claim 1, characterized in that: The fixed connection structure includes a fixed block (6) fixed on a straight pipe (21), a threaded groove (18) is provided in the fixed block (6), a through groove (19) is provided on the combustion box (7), and a fixing bolt (9) is installed between the fixed block (6) and the combustion box (7), with the fixing bolt (9) corresponding to the threaded groove (18) and the through groove (19).

5. The U-shaped fire tube heating device according to claim 1, characterized in that: The flow guiding structure includes a flow guide plate (14) fixed in the combustion chamber (8). The flow guide plate (14) has a conical structure, and the combustion chamber (8) is connected to the straight pipe (21).

6. The U-shaped fire tube heating device according to claim 1, characterized in that: The hybrid structure includes a fixed shaft (15) fixed in the combustion chamber (8), a rotating ring (17) rotatably fitted on the fixed shaft (15), and multiple fan blades (16) fixed around the rotating ring (17).

7. The U-shaped fire tube heating device according to claim 6, characterized in that: The combustion chamber (7) is fixed with a first air inlet pipe (12) and a second air inlet pipe (13) on both sides. The first air inlet pipe (12) and the second air inlet pipe (13) are both connected to the combustion chamber (8). The first air inlet pipe (12) and the second air inlet pipe (13) are located on both sides of the fixed shaft (15).

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