A gas-fired boiler heat exchanger

Abstract

The utility model belongs to gas boiler technical field, concretely relates to a gas boiler heat exchanger, include: be located in the outside prevent hot gas leakage's heat exchanger casing, be located in heat exchanger casing one side is used for belonging to hot gas's hot air import, be located in heat exchanger casing other side is used for belonging to hot gas's hot air export, seven groups of heat exchange tubes that penetrate heat exchanger casing side wall, through heat exchange assembly assembly component and connect in the liquid inlet assembly and liquid outlet assembly of heat exchange pipe end portion. The utility model, rotate the screw pipe rotation of rotary sleeve and drive, when the screw pipe rotates and drives the cross movement of butt joint pipeline to the direction of far away from butt joint branch pipe through the thread connection between the thread groove, can drive the cross movement of heat exchange tube to the direction of far away from butt joint branch pipe when butt joint pipeline cross movement, when butt joint pipeline cross movement to the outside of screw pipe can drive heat exchange tube from the inside of heat exchanger casing and take out through the bearing part, like this can carry out independent maintenance replacement to the damaged heat exchange tube, save the maintenance replacement time of heat exchange tube.

Description

Technical Field

[0001] This utility model belongs to the field of gas boiler technology, and specifically relates to a gas boiler heat exchanger. Background Technology

[0002] As a core component of a gas-fired boiler system, the heat exchanger plays a crucial role in heat transfer. Its design principle lies in optimizing the utilization of heat released during fuel combustion through a highly efficient heat transfer mechanism, thereby significantly improving energy efficiency. Specifically, a gas-fired boiler heat exchanger is essentially a specialized heat exchange device that plays a key role in the operation of the gas-fired boiler—precisely and efficiently transferring the enormous heat contained in the high-temperature flue gas or flame generated after complete fuel combustion to the medium that needs to be heated, such as water or other process fluids, thus meeting the heating needs of different industrial or civil applications.

[0003] In actual operation, when the heat exchange tubes of existing gas-fired boilers are damaged due to long-term use, material aging, or external factors and need to be repaired or replaced, the conventional operating procedure is to first disassemble the entire heat exchanger from the boiler system before specific maintenance work can be carried out. This maintenance method involves the complete disassembly and reassembly of the heat exchanger, which is not only cumbersome but also consumes a lot of time and manpower, thus significantly increasing the difficulty of maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a heat exchanger for a gas-fired boiler, which aims to solve the problem that when the heat exchange tube is damaged and needs to be repaired or replaced, the entire heat exchanger must be disassembled from the boiler system. This repair method involves the complete disassembly and assembly of the heat exchanger, which is not only cumbersome but also consumes a lot of time and manpower, thus significantly increasing the difficulty of repair.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a gas-fired boiler heat exchanger, comprising: a heat exchanger shell disposed externally to prevent hot gas leakage, a hot air inlet disposed on one side of the heat exchanger shell for hot gas, a hot air outlet disposed on the other side of the heat exchanger shell for hot gas, seven sets of heat exchange tubes penetrating the side wall of the heat exchanger shell, a liquid inlet assembly and a liquid outlet assembly connected to the ends of the heat exchange tubes by a heat exchange assembly assembly, and connecting branch pipes respectively connected to the side surfaces of the liquid inlet assembly and the liquid outlet assembly; The liquid inlet assembly includes a main liquid inlet pipe that is connected to the connecting branch pipe, and a branch pipe that is connected to the side surface of the main liquid inlet pipe. The liquid outlet assembly includes a main liquid outlet pipe that is connected in a through-through manner to the connecting branch pipe, and a branch pipe that is connected in a through-through manner to the side surface of the main liquid outlet pipe. The heat exchange assembly includes a support portion connected to the surface of the heat exchange tube and inserted into the heat exchanger shell, a sealing portion provided between the support portion and the heat exchanger shell to prevent leakage, and a positioning portion provided between the heat exchange tube and the connecting branch pipe.

[0006] As a gas boiler heat exchanger according to the present invention, preferably, the supporting part includes a supporting side plate connected to the surface of the heat exchange tube, a supporting bottom plate connected to the bottom side of the supporting side plate, and connecting pipes respectively passing through and connected to both ends of the heat exchange tube.

[0007] As a gas boiler heat exchanger according to the present invention, preferably, the sealing part includes a first sealing ring connected to the side surface of the heat exchanger shell and located on the outer ring of the insertion point of the bearing part, pressure plates connected to both ends of the connecting pipe, and a second sealing ring respectively connected to the side surfaces of the two pressure plates.

[0008] As a gas boiler heat exchanger according to the present invention, preferably, the positioning part includes a through hole formed on the side surface of the heat exchanger shell and adapted to the docking pipe, and an assembly mechanism provided between the docking pipe and the docking branch pipe.

[0009] As a gas boiler heat exchanger of this utility model, preferably, the assembly mechanism includes a threaded groove formed on the surface of the connecting pipe, a limiting ring connected to the end surface of the connecting branch pipe, a rotating sleeve fitted on the surface of the limiting ring with a size matching it, and a threaded tube connected to the side surface of the rotating sleeve and threadedly connected to the threaded groove.

[0010] As a gas boiler heat exchanger of the present invention, preferably, the heat exchanger shell is provided with an auxiliary installation component for auxiliary installation. The auxiliary installation component includes a horizontal plate connected inside the heat exchanger shell, and a conveying part embedded in the bottom of the horizontal plate and located directly below the supporting base plate. The conveying unit includes a bearing housing mounted on the bottom side of the cross plate, a horizontal shaft that extends through and is connected inside the bearing housing, and a roller connected to the end of the horizontal shaft.

[0011] Compared with the prior art, the beneficial effects of this utility model are: In this invention, rotating the rotating sleeve drives the spiral tube to rotate. When the spiral tube rotates, it drives the connecting pipe to move laterally away from the connecting branch pipe through the threaded connection with the threaded groove. When the connecting pipe moves laterally, it can drive the heat exchange tube to move laterally away from the connecting branch pipe. When the connecting pipe moves laterally to the outside of the spiral tube, the heat exchange tube can be removed from the inside of the heat exchanger shell through the bearing part. This allows for independent repair and replacement of damaged heat exchange tubes, saving repair and replacement time. In this invention, the bearing part can slide on the surface of the roller when it is subjected to force. When the bearing part slides, it can exert a force on the roller through the bearing base plate. When the roller is subjected to force, it can drive the horizontal shaft to rotate inside the bearing seat. This makes it convenient for the bearing part to drive the heat exchange tube to be installed and disassembled. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall assembly structure provided for an embodiment of this application.

[0013] Figure 2 This is a side view schematic diagram of the connection structure provided in an embodiment of this application.

[0014] Figure 3 This is a schematic diagram of the heat exchanger shell connection structure provided in an embodiment of this application.

[0015] Figure 4 This is a schematic diagram of the rear cross-sectional structure provided in an embodiment of this application.

[0016] Figure 5 Provided for the embodiments of this application Figure 4 Schematic diagram of the structure at point A in the middle.

[0017] Figure 6 This is an exploded rear cross-sectional view of an embodiment of this application.

[0018] Figure 7 This is a schematic diagram of the load-bearing connection structure provided in an embodiment of this application.

[0019] Figure 8 A schematic diagram and a partial enlarged view of the connection structure of the auxiliary installation component provided in the embodiments of this application.

[0020] In the diagram: 11. Heat exchanger shell; 12. Hot air inlet; 13. Hot air outlet; 14. Heat exchange tube; 15. Liquid inlet assembly; 151. Liquid inlet main pipe; 152. Liquid inlet branch pipe; 16. Liquid outlet assembly; 161. Liquid outlet main pipe; 162. Liquid outlet branch pipe; 17. Connecting branch pipe; 2. Heat exchanger assembly assembly; 21. Bearing part; 211. Bearing side plate; 212. Bearing base plate; 213. Connecting pipe; 22. Sealing part; 221. First sealing ring; 222. Pressure plate; 223. Second sealing ring; 23. Positioning part; 231. Perforation; 232. Assembly mechanism; 2321. Threaded groove; 2322. Limiting ring; 2323. Rotating sleeve; 2324. Threaded tube; 3. Auxiliary installation assembly; 31. Horizontal plate; 32. Conveying part; 321. Bearing seat; 322. Horizontal shaft; 323. Roller. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-8 The present invention provides the following technical solution: a gas boiler heat exchanger, comprising: a heat exchanger shell 11 disposed on the outside to prevent hot gas leakage, a hot air outlet 13 disposed on one side of the heat exchanger shell 11 for hot gas, a hot air inlet 12 disposed on the other side of the heat exchanger shell 11 for hot gas, seven sets of heat exchange tubes 14 penetrating the side wall of the heat exchanger shell 11, a liquid inlet assembly 15 and a liquid outlet assembly 16 connected to the ends of the heat exchange tubes 14 by a heat exchange assembly 2, and connecting branch pipes 17 respectively connected to the side surfaces of the liquid inlet assembly 15 and the liquid outlet assembly 16; The liquid inlet assembly 15 includes a liquid inlet main pipe 151 that is connected through to the docking branch pipe 17, and a liquid inlet branch pipe 152 that is connected through to the side surface of the liquid inlet main pipe 151. The liquid outlet assembly 16 includes a liquid outlet main pipe 161 that is connected in a through manner to the docking branch pipe 17, and a liquid outlet branch pipe 162 that is connected in a through manner to the side surface of the liquid outlet main pipe 161. The heat exchange assembly 2 includes a support portion 21 connected to the surface of the heat exchange tube 14 and inserted into the heat exchanger housing 11, a sealing portion 22 provided between the support portion 21 and the heat exchanger housing 11 to prevent leakage, and a positioning portion 23 provided between the heat exchange tube 14 and the connecting branch pipe 17. The heat exchanger is installed at the end of the hot air pipe of the gas boiler. Then, the hot air enters the interior of the heat exchanger shell 11 through the hot air inlet 12. At the same time, the water can enter the interior of the liquid inlet main pipe 151 through the liquid inlet branch pipe 152. Then, the liquid inlet main pipe 151 enters the interior of the heat exchange tube 14 through the docking branch pipe 17 for circulation. At this time, the heat of the hot air in the heat exchanger shell 11 can be transferred to the water in the heat exchange tube 14, thereby heating the water and realizing the heat exchange between the water and the hot air.

[0023] Preferably, the support portion 21 includes a support side plate 211 connected to the surface of the heat exchange tube 14, a support bottom plate 212 connected to the bottom side of the support side plate 211, and docking pipes 213 that pass through and connect to both ends of the heat exchange tube 14. Preferably, the sealing part 22 includes a first sealing ring 221 connected to the side surface of the heat exchanger shell 11 and located on the outer ring of the insertion point of the bearing part 21, pressure plates 222 connected to both ends of the docking pipe 213, and second sealing rings 223 respectively connected to the side surfaces of the two pressure plates 222. In practical use, the first sealing ring 221 can achieve the seal between the bearing part 21 and the heat exchanger shell 11, and the second sealing ring 223 can achieve the seal between the heat exchange tube 14 and the heat exchanger shell 11. This can prevent heat loss caused by the leakage of hot gas. Then the gas after heat exchange is discharged through the hot air outlet 13.

[0024] Preferably, the positioning part 23 includes a through hole 231 formed on the side surface of the heat exchanger shell 11 and adapted to the docking pipe 213, and an assembly mechanism 232 provided between the docking pipe 213 and the docking branch pipe 17. In practical use, the heat exchange tube 14 can be fixedly installed inside the heat exchanger shell 11 through the assembly mechanism 232, so that the heat exchange tube 14 can be easily installed and removed.

[0025] Preferably, the assembly mechanism 232 includes a threaded groove 2321 formed on the surface of the connecting pipe 213, a limiting ring 2322 connected to the end surface of the connecting branch pipe 17, a rotating sleeve 2323 fitted onto the surface of the limiting ring 2322 with a size matching it, and a threaded tube 2324 connected to the side surface of the rotating sleeve 2323 and threadedly connected to the threaded groove 2321. In practical use, the connection between the connecting pipe 213 and the connecting branch pipe 17 can be achieved through the threaded connection between the threaded groove 2321 and the threaded tube 2324.

[0026] Preferably, the heat exchanger housing 11 is provided with an auxiliary installation assembly 3 for auxiliary installation. The auxiliary installation assembly 3 includes a horizontal plate 31 connected inside the heat exchanger housing 11 and a conveying part 32 fitted into the bottom of the horizontal plate 31 and located directly below the supporting base plate 212. The conveying unit 32 includes a bearing seat 321 mounted on the bottom side of the horizontal plate 31, a horizontal shaft 322 that passes through and is connected inside the bearing seat 321, and a roller 323 connected to the end of the horizontal shaft 322. In practical use, when the base plate 212 slides, it can exert a force on the roller 323. When the roller 323 is subjected to the force, it can drive the horizontal shaft 322 to rotate inside the bearing seat 321.

[0027] The working principle of this utility model in specific use is as follows: When the heat exchange tube 14 is damaged and needs to be repaired, the rotating sleeve 2323 can be rotated. When the rotating sleeve 2323 is subjected to force, it can rotate on the surface of the limiting ring 2322. When the rotating sleeve 2323 rotates, it can drive the screw tube 2324 to rotate. When the screw tube 2324 rotates, it drives the docking pipe 213 to move laterally away from the docking branch pipe 17 through the threaded connection with the threaded groove 2321. When the docking pipe 213 moves laterally, it drives the heat exchange tube 14 to move laterally away from the docking branch pipe 17. When the connecting pipe 213 moves laterally to the outside of the spiral pipe 2324, the bearing part 21 can be pulled away from the heat exchanger shell 11. When the bearing part 21 is subjected to force, it can slide on the surface of the roller 323. When the bearing part 21 slides, it can exert force on the roller 323 through the bearing base plate 212. When the roller 323 is subjected to force, it can drive the horizontal shaft 322 to rotate inside the bearing seat 321. After the support unit 21 drives the heat exchange tube 14 to be removed from the inside of the heat exchanger shell 11, the heat exchange tube 14 can be repaired or replaced.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gas-fired boiler heat exchanger, characterized in that, include: A heat exchanger shell (11) is provided on the outside to prevent hot air leakage. A hot air inlet (12) for hot air is provided on one side of the heat exchanger shell (11). A hot air outlet (13) for hot air is provided on the other side of the heat exchanger shell (11). Seven sets of heat exchange tubes (14) penetrate the side wall of the heat exchanger shell (11). A liquid inlet assembly (15) and a liquid outlet assembly (16) are connected to the end of the heat exchange tubes (14) through a heat exchange assembly assembly (2). A connecting branch pipe (17) is connected to the side surface of the liquid inlet assembly (15) and the liquid outlet assembly (16) respectively. The liquid inlet assembly (15) includes a liquid inlet main pipe (151) that is connected through to the docking branch pipe (17), and a liquid inlet branch pipe (152) that is connected through to the side surface of the liquid inlet main pipe (151). The liquid outlet assembly (16) includes a liquid outlet main pipe (161) that is connected in a through connection with the docking branch pipe (17), and a liquid outlet branch pipe (162) that is connected in a through connection with the side surface of the liquid outlet main pipe (161). The heat exchange assembly (2) includes a support part (21) connected to the surface of the heat exchange tube (14) and inserted into the heat exchanger housing (11), a sealing part (22) provided between the support part (21) and the heat exchanger housing (11) to prevent leakage, and a positioning part (23) provided between the heat exchange tube (14) and the connecting branch pipe (17).

2. A gas-fired boiler heat exchanger as defined in claim 1, characterised in that: The support part (21) includes a support side plate (211) connected to the surface of the heat exchange tube (14), a support bottom plate (212) connected to the bottom side of the support side plate (211), and docking pipes (213) that pass through and connect to both ends of the heat exchange tube (14).

3. A gas-fired boiler heat exchanger as defined in claim 2, characterised in that: The sealing part (22) includes a first sealing ring (221) connected to the side surface of the heat exchanger shell (11) and located on the outer ring of the insertion point of the bearing part (21), pressure plates (222) connected to both ends of the docking pipe (213), and second sealing rings (223) respectively connected to the side surfaces of the two pressure plates (222).

4. A gas-fired boiler heat exchanger as claimed in claim 3, characterised in that: The positioning part (23) includes a perforation (231) formed on the side surface of the heat exchanger shell (11) and adapted to the docking pipe (213), and an assembly mechanism (232) provided between the docking pipe (213) and the docking branch pipe (17).

5. A gas-fired boiler heat exchanger as claimed in claim 4, characterised in that: The assembly mechanism (232) includes a threaded groove (2321) formed on the surface of the connecting pipe (213), a limiting ring (2322) connected to the end surface of the connecting branch pipe (17), a rotating sleeve (2323) fitted on the surface of the limiting ring (2322) with a size matching it, and a threaded tube (2324) connected to the side surface of the rotating sleeve (2323) and threadedly connected to the threaded groove (2321).

6. A gas-fired boiler heat exchanger as set forth in claim 2 further characterized by: The heat exchanger housing (11) is provided with an auxiliary installation assembly (3) for auxiliary installation. The auxiliary installation assembly (3) includes a horizontal plate (31) connected inside the heat exchanger housing (11) and a conveying part (32) fitted into the bottom of the horizontal plate (31) and located directly below the supporting base plate (212). The conveying unit (32) includes a bearing seat (321) mounted on the bottom side of the horizontal plate (31), a horizontal shaft (322) that passes through and is connected inside the bearing seat (321), and a roller (323) connected to the end of the horizontal shaft (322).

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