A secondary condensation heat exchanger convenient to disassemble
Patent Information
- Application Number
- CN202522109384.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-09-30
AI Technical Summary
[0003]二次冷凝式热交换器的内部结构通常较为复杂，各个部件之间的连接方式繁琐，比如冷凝器主体与连接水管的连接，往往采用焊接或者复杂的螺栓连接，这使得在进行设备的安装、维修或者更换部件时，需要耗费大量的时间和人力，不仅增加了维护成本，还可能因拆装过程中的操作不当对设备造成损坏
1、本实用新型通过设置前盖板铰接安装在安装壳正面，方便开启和关闭，便于对热交换器内部进行操作和维护，连接水管与进出水管通过连通结构连通，保证了水的正常流通，为热交换过程提供了基础，传动结构能控制两个连通结构同时移动，实现快速连接或断开，提高了拆装效率，推动结构与前盖板配合，在使用时固定二次冷凝器主体，拆卸时将其推出安装壳，简化了拆卸流程，定位脚片对二次冷凝器主体进行定位支撑，确保其在安装壳内的稳定位置，锁定结构可对前盖板进行固定，保证热交换器整体结构的稳定性，使整个热交换器在安装、使用和拆卸过程中更加便捷、高效和可靠。
Smart Images
Figure CN224719264U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of auxiliary disassembly technology for heat exchanger components, specifically a secondary condensing heat exchanger that is easy to disassemble and assemble. Background Technology
[0002] In the field of heat exchange technology, heat exchangers are widely used in numerous industrial production processes and daily life scenarios, serving to achieve the efficient transfer and exchange of heat. Secondary condensing heat exchangers, as a specific type of heat exchanger, can further recover and utilize heat energy, thereby improving energy efficiency, which is particularly important in today's environment that emphasizes energy conservation and environmental protection.
[0003] The internal structure of secondary condensing heat exchangers is usually quite complex, and the connection between various components is cumbersome. For example, the connection between the condenser body and the connecting water pipes often uses welding or complex bolt connections. This makes it necessary to spend a lot of time and manpower when installing, repairing or replacing parts of the equipment, which not only increases maintenance costs, but may also damage the equipment due to improper operation during disassembly and assembly.
[0004] In summary, in order to overcome the aforementioned defects of existing secondary condensing heat exchangers, it is of great practical significance to develop a secondary condensing heat exchanger that is easy to disassemble, install, and maintain. Utility Model Content
[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a secondary condensing heat exchanger that is easy to disassemble and assemble, and has the advantages of easy disassembly, assembly, and maintenance.
[0006] This utility model provides the following technical solution: a secondary condensing heat exchanger that is easy to assemble and disassemble, comprising a mounting shell, a front cover plate, a secondary condenser body, a connecting structure, a transmission structure, a pushing structure, positioning feet, and a locking structure. The front cover plate is hinged to the front of the mounting shell via a shaft. Water pipes are connected to the upper sides of both sides of the mounting shell. The secondary condenser body is disposed inside the mounting shell. A flue gas inlet pipe is connected to the left side of the top of the secondary condenser body, and a flue gas outlet pipe is connected to the right side of the top of the secondary condenser body. Water inlet and outlet pipes, which cooperate with the connecting water pipes, are connected to the upper sides of both sides of the secondary condenser body. There are two connecting structures, each sleeved on the inner surface of one of the two connecting water pipes, for use in... The inner end of the connecting water pipe and the outer ends of the inlet and outlet water pipes are connected. The transmission structure is installed on the rear side of the inner wall of the mounting shell, and its output ends on the left and right sides are connected to the connecting structure to control the simultaneous movement of the two connecting structures. The pushing structure is installed on the rear side of the inner wall of the mounting shell, and its front side is attached to the back side of the secondary condenser body. When in use, it cooperates with the front cover plate to fix the secondary condenser body. When disassembly is required, the secondary condenser body is pushed out of the mounting shell. There are two positioning feet, and the two positioning feet are respectively installed on the left and right sides of the lower part of the mounting shell. Their tops are attached to the bottom of the secondary condenser body to provide positioning support for the secondary condenser body. The locking structure is installed on the top of the front cover plate to fix the front cover plate.
[0007] The beneficial effects of this utility model are as follows: 1. This utility model features a front cover plate hinged to the front of the mounting housing, facilitating easy opening and closing and enabling convenient operation and maintenance of the heat exchanger's interior. The connecting water pipes are linked to the inlet and outlet water pipes via a connecting structure, ensuring normal water flow and providing a foundation for the heat exchange process. The transmission structure controls the simultaneous movement of the two connecting structures, enabling rapid connection or disconnection and improving assembly / disassembly efficiency. The pushing structure, in conjunction with the front cover plate, secures the secondary condenser body during use and pushes it out of the mounting housing during disassembly, simplifying the disassembly process. Positioning feet provide positioning support for the secondary condenser body, ensuring its stable position within the mounting housing. The locking structure secures the front cover plate, guaranteeing the overall stability of the heat exchanger structure. This makes the entire heat exchanger more convenient, efficient, and reliable during installation, use, and disassembly.
[0008] 2. This utility model, through the setting of a movable sleeve fitted onto the surface of the connecting water pipe, a movable sealing ring fitting against the first sealing retaining ring, a second sealing retaining ring engaging with the inner wall of the movable sleeve, and the setting of a sealing sliding sleeve, together constitute a multi-layer sealing structure. The first and second sealing retaining rings, made of fluororubber, have good chemical corrosion resistance and sealing performance, while the movable sealing ring, made of hydrogenated nitrile rubber, has good wear resistance and elasticity. This sealing structure not only effectively prevents water leakage and ensures the normal operation of the heat exchanger, but also allows for quick connection and disconnection when the movable sleeve moves, facilitating the disassembly and assembly of the connecting water pipe and the inlet and outlet water pipes, and improving the efficiency of maintenance and component replacement. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a frontal sectional view of the present invention. Figure 3 This is a schematic diagram of the rear cross-sectional structure of this utility model; Figure 4 This is a schematic diagram of the left sectional view of the present invention; Figure 5 This is a top sectional view of the structure of this utility model; Figure 6 This utility model Figure 2 A magnified structural diagram of A in the diagram.
[0010] In the diagram: 1. Mounting shell; 2. Front cover plate; 3. Secondary condenser body; 4. Connecting structure; 5. Transmission structure; 6. Pushing structure; 7. Positioning foot; 8. Locking structure; 9. Connecting water pipe; 10. Exhaust pipe; 11. Inlet and outlet water pipes; 12. Moving sleeve; 13. First sealing ring; 14. Second sealing ring; 15. Moving sealing ring; 16. Two-way lead screw; 17. Nut seat; 18. Tightening rod; 19. First bevel gear; 20. Second bevel gear; 21. Push plate; 22. Damping telescopic rod; 23. Crossbar; 24. Round rod; 25. Positioning rod; 26. Purification hood; 27. T-block; 28. Sealing ring. Detailed Implementation
[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0012] like Figures 1 to 6As shown, the secondary condensing heat exchanger of this embodiment includes a mounting shell 1, a front cover plate 2, a secondary condenser body 3, a connecting structure 4, a transmission structure 5, a pushing structure 6, positioning feet 7, and a locking structure 8. The front cover plate 2 is hinged to the front of the mounting shell 1 via a shaft. The back of the front cover plate 2 is rotatably connected to rollers via a rotating shaft. The surface of the rollers is in contact with the front of the secondary condenser body 3 to reduce friction when the front cover plate 2 is closed. Water pipes 9 are connected to the upper left and right sides of the mounting shell 1. The secondary condenser body 3 is located inside the mounting shell 1. A flue gas inlet pipe is connected to the left side of the top of the secondary condenser body 3, and a flue gas outlet pipe 10 is connected to the right side of the top of the secondary condenser body 3. Water inlet and outlet pipes 11, which cooperate with the water pipes 9, are connected to the upper left and right sides of the secondary condenser body 3. There are two connecting structures 4, and the two connecting structures are connected to each other. Structure 4 is respectively fitted onto the inner surface of the two connecting water pipes 9, and is used to connect the inner end of the connecting water pipe 9 and the outer end of the inlet and outlet water pipes 11. The transmission structure 5 is installed on the rear side of the inner wall of the mounting shell 1, and its output ends on the left and right sides are connected to the connecting structure 4, and is used to control the two connecting structures 4 to move simultaneously. The pushing structure 6 is installed on the rear side of the inner wall of the mounting shell 1, and its front side is attached to the back side of the secondary condenser body 3. When in use, it cooperates with the front cover plate 2 to fix the secondary condenser body 3. When disassembly is required, the secondary condenser body 3 is pushed out of the mounting shell 1. There are two positioning feet 7, and the two positioning feet 7 are respectively installed on the left and right sides of the lower part of the mounting shell 1. Their tops are attached to the bottom of the secondary condenser body 3, and are used to position and support the secondary condenser body 3. The locking structure 8 is installed on the top of the front cover plate 2, and is used to fix the front cover plate 2.
[0013] refer to Figure 6 The connecting structure 4 includes a movable sleeve 12 sleeved on the surface of the connecting water pipe 9, a first sealing ring 13 fixedly connected to the inner side of the surface of the inlet / outlet water pipe 11, and a second sealing ring 14 fixedly connected to the inner surface of the connecting water pipe 9. Both the first sealing ring 13 and the second sealing ring 14 are made of fluororubber. A movable sealing ring 15 made of hydrogenated nitrile rubber is fixedly connected to the inner side of the movable sleeve 12. The inner surface of the movable sealing ring 15 slides in contact with the surface of the inlet / outlet water pipe 11. The inner side of the movable sealing ring 15 fits against the outer side of the first sealing ring 13. The outer surface of the second sealing ring 14 slides in connection with the inner wall of the movable sleeve 12. The outer side of the second sealing ring 14 fits against the outer side of the inner wall of the movable sleeve 12. A sealing sliding sleeve is fixedly connected to the outer side of the inner wall of the movable sleeve 12. The inner wall of the sealing sliding sleeve slides in connection with the surface of the connecting water pipe 9.
[0014] In this embodiment, a multi-layered sealing structure is formed by setting a movable sleeve 12 on the surface of the connecting water pipe 9, a movable sealing ring 15 fitting with the first sealing retaining ring 13, a second sealing retaining ring 14 engaging with the inner wall of the movable sleeve 12, and a sealing sliding sleeve. The first and second sealing retaining rings 13 and 14, made of fluororubber, have good chemical corrosion resistance and sealing performance, while the movable sealing ring 15, made of hydrogenated nitrile rubber, has good wear resistance and elasticity. This sealing structure not only effectively prevents water leakage and ensures the normal operation of the heat exchanger, but also allows for quick connection and disconnection when the movable sleeve 12 moves, facilitating the disassembly and assembly of the connecting water pipe 9 and the inlet and outlet water pipes 11, thus improving the efficiency of maintenance and component replacement.
[0015] refer to Figure 3 The transmission structure 5 includes a bidirectional lead screw 16 located inside the upper rear side of the mounting housing 1 and a circular groove on the rear top side of the mounting housing 1. The left and right sides of the surface of the bidirectional lead screw 16 are threaded with symmetrically arranged nut seats 17. The back of the nut seat 17 is slidably connected to the rear side of the inner wall of the mounting housing 1. The outer side of the nut seat 17 is fixedly connected to the surface of the movable sleeve 12 through a connecting bracket. The inside of the circular groove is rotatably connected to a turning rod 18 through a bearing. The bottom of the turning rod 18 extends above the bidirectional lead screw 16 and is fixedly connected to a first bevel gear 19. The surface of the bidirectional lead screw 16 is fixedly connected to a second bevel gear 20. The surface of the first bevel gear 19 meshes with the surface of the second bevel gear 20.
[0016] In this embodiment, the transmission structure 5 enables the two connected structures 4 to move synchronously, improving operational convenience and efficiency. The bidirectional lead screw 16 is threadedly connected to the nut seat 17. By rotating the turning rod 18, the meshing of the first bevel gear 19 and the second bevel gear 20 drives the bidirectional lead screw 16 to rotate, thereby causing the nut seat 17 to move left and right on the bidirectional lead screw 16. The nut seat 17 is connected to the moving sleeve 12 through the connecting frame, which in turn drives the connected structure 4 to move. This transmission method can precisely control the movement of the connected structure 4, ensuring the stability and accuracy of the connection.
[0017] refer to Figure 3 The pushing structure 6 includes a pushing plate 21 attached to the back of the secondary condenser body 3. Damping telescopic rods 22 are fixedly connected to the four corners of the back of the pushing plate 21. The rear end of the damping telescopic rod 22 is fixedly connected to the rear side of the inner wall of the mounting shell 1. A compression spring is sleeved on the surface of the damping telescopic rod 22. The front end of the compression spring is fixedly connected to the back of the pushing plate 21, and the rear end of the compression spring is fixedly connected to the rear side of the inner wall of the mounting shell 1.
[0018] This embodiment facilitates the installation and disassembly of the secondary condenser body 3 by incorporating a pushing structure 6. The pushing plate 21 is connected to the inner wall of the mounting shell 1 via a damping telescopic rod 22 and a compression spring. During heat exchanger operation, the pushing plate 21, under the action of the compression spring, fits tightly against the secondary condenser body 3, working together with the front cover plate 2 to fix the secondary condenser body 3, ensuring its stability during operation. When it is necessary to disassemble the secondary condenser body 3, the front cover plate 2 is opened, and the pushing plate 21, under the action of the damping telescopic rod 22 and the compression spring, pushes the secondary condenser body 3 out of the mounting shell 1. This reduces the difficulty and workload of manual operation, improves disassembly efficiency, and the damping telescopic rod 22 acts as a buffer, preventing damage to the secondary condenser body 3 during the pushing process.
[0019] refer to Figure 1 The locking structure 8 includes a crossbar 23 located above the front cover plate 2. Circular holes are provided on both the left and right sides of the crossbar 23, and a circular rod 24 is slidably connected inside the circular holes. A tension spring is sleeved on the lower surface of the circular rod 24. The top end of the tension spring is fixedly connected to the bottom of the crossbar 23, and the bottom end of the tension spring is fixedly connected to the top of the front cover plate 2. Positioning rods 25 are fixedly connected to both the left and right sides of the bottom of the crossbar 23. Positioning holes are provided on both the left and right sides of the top of the mounting shell 1, and the bottom end of the positioning rod 25 is inserted into the inner wall of the positioning hole.
[0020] This embodiment enhances the fixing effect of the front cover plate 2 by setting a locking structure 8, ensuring the stability of the overall structure of the heat exchanger. The crossbar 23 is connected to the front cover plate 2 via a round rod 24 and a tension spring. The positioning rod 25 at the bottom of the crossbar 23 is inserted into the positioning hole at the top of the mounting shell 1, which can firmly fix the front cover plate 2. During the operation of the heat exchanger, it can prevent the front cover plate 2 from being opened accidentally, avoiding damage to internal components or affecting the normal operation of the heat exchanger. At the same time, the tension spring provides the crossbar 23 with a certain degree of elasticity during operation, making it easy for the positioning rod 25 to be inserted or pulled out of the positioning hole, facilitating the opening and closing of the front cover plate 2, and improving the convenience of use.
[0021] refer to Figure 1 The exhaust pipe 10 is threadedly connected to a purification hood 26, and the purification hood 26 is equipped with a removable air purification filter.
[0022] This embodiment effectively solves the problem of exhaust pollution by setting up a purification hood 26 with a threaded connection to the output end of the exhaust pipe 10 and an internally removable air purification filter. The air purification filter can purify the exhaust gas, remove harmful substances, reduce environmental pollution, and meet environmental protection requirements. Moreover, the purification hood 26 and the exhaust pipe 10 are connected by threads, which facilitates the disassembly and replacement of the air purification filter, making it easy to maintain and service the purification device and ensuring the continuous effectiveness of the purification effect.
[0023] refer to Figure 5 A T-shaped block 27 is fixedly connected to the back of the nut seat 17. T-shaped grooves that cooperate with the T-shaped block 27 are provided on the left and right sides of the rear side of the inner wall of the mounting shell 1. The surface of the T-shaped block 27 is slidably connected to the inner wall of the T-shaped groove.
[0024] This embodiment further improves the operational stability of the transmission structure 5 by setting the T-shaped block 27 on the back of the nut seat 17 to slide in the T-groove on the inner wall of the mounting shell 1. The cooperation between the T-shaped block 27 and the T-groove restricts the degree of freedom of the nut seat 17 during movement, allowing it to move only along the axial direction of the bidirectional lead screw 16. This avoids wobbling and offset of the nut seat 17, ensuring the stability of the threaded connection between the nut seat 17 and the bidirectional lead screw 16. It also ensures that the nut seat 17 accurately drives the connecting structure 4 to move through the connecting frame, improving the reliability and accuracy of the entire transmission structure 5, thereby ensuring the normal operation of the heat exchanger.
[0025] refer to Figure 6 The inner end of the water pipe 9 and the outer end of the inlet and outlet water pipes 11 are both fixedly connected with sealing rings 28, and the inner sides of the two sealing rings 28 are in contact.
[0026] This embodiment further enhances the sealing performance of the connection by setting a sealing ring 28 that is fixedly connected to the inner end of the connecting water pipe 9 and the outer end of the inlet and outlet water pipes 11. The inner sides of the two sealing rings 28 fit together, effectively preventing water leakage at the connection and improving the working efficiency and reliability of the heat exchanger. At the same time, the setting of the sealing ring 28 can also reduce wear at the connection, extend the service life of the connecting water pipe 9 and the inlet and outlet water pipes 11, and reduce maintenance costs. During the long-term use of the heat exchanger, good sealing performance is of great significance for ensuring the normal operation of the equipment and saving energy.
[0027] The secondary condenser body 3 is placed inside the mounting shell 1, and the positioning feet 7 provide positioning support to ensure stable position. The front cover 2 is closed, and the locking structure 8 is operated to allow the positioning rod 25 at the bottom of the crossbar 23 to be inserted into the positioning hole at the top of the mounting shell 1. The tension spring makes the crossbar 23 elastic, thus fixing the front cover 2. The turning rod 18 is rotated, and the meshing of the first bevel gear 19 and the second bevel gear 20 drives the double-acting screw 16 to rotate, causing the nut seat 17 to move on the double-acting screw 16. The moving sleeve 12 is moved through the connecting frame, allowing the connecting structure 4 to connect the connecting water pipe 9 and the inlet and outlet water pipes 11, ensuring normal water flow and providing the basic conditions for heat exchange. The secondary condenser body 3 then begins to work (the secondary condenser body 3 is a mature existing technology, and its working principle will not be described in detail). The exhaust pipe 10 on the right side of the secondary condenser body 3 discharges flue gas, and the air purification filter element in the purification hood 26 at the output end of the exhaust pipe 10 purifies the flue gas. The purification process involves the push plate 21 of the push structure 6 being tightly fitted to the secondary condenser body 3 under the action of a compression spring. Together with the front cover plate 2, the secondary condenser body 3 is fixed to ensure stable operation. When disassembly and maintenance are required, the locking structure 8 is opened, the crossbar 23 is pulled up to allow the positioning rod 25 to be pulled out of the positioning hole, the front cover plate 2 is opened, and the rotating rod 18 is rotated in the opposite direction. Through the transmission structure 5, the connecting structure 4 disconnects the connection between the water pipe 9 and the inlet and outlet water pipes 11. Under the action of the damping telescopic rod 22 and the compression spring, the push plate 21 of the push structure 6 pushes the secondary condenser body 3 out of the mounting shell 1, making it easy to remove for maintenance or replacement of parts.
Claims
1. A secondary condensing heat exchanger that is easy to assemble and disassemble, comprising a mounting shell (1), a front cover plate (2), and a secondary condenser body (3), characterized in that: The secondary condensing heat exchanger further includes a connecting structure (4), a transmission structure (5), a pushing structure (6), positioning feet (7), and a locking structure (8). The front cover plate (2) is hinged to the front of the mounting shell (1) via a shaft. The upper sides of the mounting shell (1) are connected to connecting water pipes (9). The secondary condenser body (3) is located inside the mounting shell (1). The left side of the top of the secondary condenser body (3) is connected to the flue gas inlet pipe, and the right side of the top of the secondary condenser body (3) is connected to the flue gas outlet pipe (10). The upper sides of the left and right sides of the secondary condenser body (3) are connected to inlet and outlet water pipes (11) that cooperate with the connecting water pipes (9). There are two connecting structures (4), and the two connecting structures (4) are respectively fitted onto the inner surface of the two connecting water pipes (9) for connecting... The inner end of the water inlet pipe (9) is connected to the outer end of the water inlet and outlet pipe (11). The transmission structure (5) is installed on the rear side of the inner wall of the mounting shell (1). Its output ends on the left and right sides are connected to the connecting structure (4) to control the two connecting structures (4) to move simultaneously. The pushing structure (6) is installed on the rear side of the inner wall of the mounting shell (1). Its front side is attached to the back side of the secondary condenser body (3) and cooperates with the front cover plate (2) to fix the secondary condenser body (3). There are two positioning feet (7). The two positioning feet (7) are installed on the left and right sides of the lower part of the mounting shell (1). Their tops are attached to the bottom of the secondary condenser body (3) to position and support the secondary condenser body (3). The locking structure (8) is installed on the top of the front cover plate (2) to fix the front cover plate (2).
2. The easily disassembled secondary condensing heat exchanger according to claim 1, characterized in that: The connecting structure (4) includes a movable sleeve (12) sleeved on the surface of the connecting water pipe (9), a first sealing ring (13) fixedly connected to the inner side of the surface of the inlet and outlet water pipe (11), and a second sealing ring (14) fixedly connected to the inner surface of the connecting water pipe (9). A movable sealing ring (15) is fixedly connected to the inner side of the movable sleeve (12). The inner surface of the movable sealing ring (15) slides in contact with the surface of the inlet and outlet water pipe (11). The inner side of the movable sealing ring (15) fits against the outer side of the first sealing ring (13). The outer surface of the second sealing ring (14) slides in contact with the inner wall of the movable sleeve (12). The outer side of the second sealing ring (14) fits against the outer side of the inner wall of the movable sleeve (12).
3. The easily disassembled secondary condensing heat exchanger according to claim 2, characterized in that: The transmission structure (5) includes a bidirectional lead screw (16) located on the upper rear side inside the mounting shell (1) and a circular groove on the rear top side of the mounting shell (1). The left and right sides of the surface of the bidirectional lead screw (16) are threaded with symmetrically arranged nut seats (17). The back of the nut seat (17) is slidably connected to the rear side of the inner wall of the mounting shell (1). The outer side of the nut seat (17) is fixedly connected to the surface of the movable sleeve (12) through a connecting bracket. The inside of the circular groove is rotatably connected to a turning rod (18) through a bearing. The bottom of the turning rod (18) extends above the bidirectional lead screw (16) and is fixedly connected to a first bevel gear (19). The surface of the bidirectional lead screw (16) is fixedly connected to a second bevel gear (20). The surface of the first bevel gear (19) meshes with the surface of the second bevel gear (20).
4. A secondary condensing heat exchanger that is easy to disassemble and assemble according to claim 3, characterized in that: The pushing structure (6) includes a pushing plate (21) attached to the back of the secondary condenser body (3). Damping telescopic rods (22) are fixedly connected to the four corners of the back of the pushing plate (21). The rear end of the damping telescopic rod (22) is fixedly connected to the rear side of the inner wall of the mounting shell (1). A compression spring is sleeved on the surface of the damping telescopic rod (22). The front end of the compression spring is fixedly connected to the back of the pushing plate (21), and the rear end of the compression spring is fixedly connected to the rear side of the inner wall of the mounting shell (1).
5. A secondary condensing heat exchanger that is easy to disassemble and assemble according to claim 4, characterized in that: The locking structure (8) includes a crossbar (23) set above the front cover plate (2). The crossbar (23) has round holes on both the left and right sides, and a round rod (24) is slidably connected inside the round holes. A tension spring is sleeved on the lower surface of the round rod (24). The top end of the tension spring is fixedly connected to the bottom of the crossbar (23), and the bottom end of the tension spring is fixedly connected to the top of the front cover plate (2). Positioning rods (25) are fixedly connected to the left and right sides of the bottom of the crossbar (23). Positioning holes are opened on the left and right sides of the top of the mounting shell (1), and the bottom end of the positioning rod (25) is inserted into the inner wall of the positioning hole.
6. A secondary condensing heat exchanger that is easy to disassemble and assemble according to claim 5, characterized in that: The exhaust pipe (10) is threadedly connected to a purification hood (26), and the purification hood (26) is equipped with a removable air purification filter.
7. A secondary condensing heat exchanger that is easy to disassemble and assemble according to claim 6, characterized in that: A T-shaped block (27) is fixedly connected to the back of the nut seat (17). T-shaped grooves that cooperate with the T-shaped block (27) are provided on the left and right sides of the rear side of the inner wall of the mounting shell (1). The surface of the T-shaped block (27) is slidably connected to the inner wall of the T-shaped groove.
8. A secondary condensing heat exchanger that is easy to disassemble and assemble according to claim 7, characterized in that: The inner end of the connecting water pipe (9) and the outer end of the inlet and outlet water pipe (11) are both fixedly connected with sealing rings (28), and the inner sides of the two sealing rings (28) are in contact.