Energy-saving gas condensing boiler convenient to maintain

Abstract

This invention relates to the field of gas-fired condensing boiler technology, specifically to an energy-saving gas-fired condensing boiler that is easy to maintain. The boiler includes: a first heating chamber, with a second heating chamber at one end; pipes, with a first fixing ring at one end; a top-holding plate fixed to the surface of the first heating chamber; a sleeve at one end of the pipe; a connecting pipe at one end of the sleeve; a insertion groove on the surface of the connecting pipe; and a force-bearing plate fixed to the surface of the sleeve; and an arc-shaped groove on the surface of the top-holding plate. The beneficial effects are: the snap-fit ​​groove provided in this invention has a top-holding block for pushing the pipe, making the two sets of pipes fit tightly together; and the surfaces of the first and second heating chambers are provided with sealing strips for sealing; after the first and second heating chambers separate, the top-holding plate no longer holds the surface of the force-bearing plate, allowing the sleeve to retract into the connecting pipe, and the screws on the surfaces of the second and first fixing rings to be removed.

Description

Technical Field

[0001] This invention relates to the field of gas-fired condensing boiler technology, specifically to an energy-saving gas-fired condensing boiler that is easy to maintain. Background Technology

[0002] A boiler is a commonly used energy conversion device that transfers the chemical energy released from fuel combustion or the heat energy from high-temperature flue gas in industrial production to water inside the boiler through a heat transfer process. The water absorbs heat and becomes high-temperature water or steam with a certain amount of thermal energy. In traditional boilers, the flue gas produced by combustion is directly discharged through the chimney. However, because the temperature of the discharged flue gas is high and it carries a large amount of superheated water vapor, a significant amount of heat is released and cannot be utilized for heating, resulting in poor energy efficiency. Installing a condenser at the flue gas outlet can effectively recover the discharged heat energy, achieving energy saving and environmental protection.

[0003] In the prior art, patent CN213480614U includes a boiler body, a burner is provided at the left end of the boiler body, a water inlet and a steam outlet are provided on the boiler body, an exhaust port is fixedly installed on the right end face of the boiler body, a condensing box is fixedly installed at the exhaust port, and a condensing assembly is provided inside the condensing box. This utility model is an energy-saving gas-fired condensing boiler that is easy to maintain. By setting metal mesh plates, heat-conducting fins and sealing gaskets, it achieves the effects of improving the recovery efficiency of the boiler condenser, increasing the service life of the condensing pipe, and facilitating maintenance and repair. It solves the problems of low heat recovery efficiency of the condenser in most current energy-saving gas-fired condensing boilers, the presence of toxic gases in the flue gas, easy corrosion of the condensing pipe, and inconvenient maintenance and repair.

[0004] However, the combustion chamber walls of existing gas-fired condensing boilers will accumulate carbon deposits after long-term use. These carbon deposits will affect the heat transfer of the flame, thereby reducing the thermal efficiency of the gas-fired condensing boiler. Furthermore, it is not convenient to clean the carbon deposits on the combustion chamber walls of existing gas-fired condensing boilers. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving gas-fired condensing boiler that is easy to maintain, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving gas-fired condensing boiler that is easy to maintain, comprising:

[0007] The first heating chamber has a second heating chamber at its end;

[0008] The pipe has a first fixing ring at its end, a top support plate fixed to the surface of the first heating chamber, a sleeve at its end, a connecting pipe at its end, a insertion groove on the surface of the connecting pipe, a force-bearing plate fixed to the surface of the sleeve, and an arc-shaped groove on the surface of the top support plate.

[0009] Preferably, a fixing plate is fixed to the surface of the first heating chamber, and the surface of the fixing plate is provided with threaded holes. A sealing strip is provided on the surface of the first heating chamber, and a snap-fit ​​groove is provided on the surface of the first heating chamber. A top holding block is provided inside the snap-fit ​​groove. Multiple sets of top holding blocks are provided. A pipe is provided between the first heating chamber and the second heating chamber. Two sets of pipes are provided. The pipes can be placed in the snap-fit ​​groove, and the top holding blocks hold the surface of the pipes. After the first heating chamber and the second heating chamber are combined, the top holding blocks hold the surface of the pipes, so that the two sets of pipes are attached together.

[0010] Preferably, a movable rod is inserted inside the first heating chamber and the second heating chamber. The movable rod can move inside the first heating chamber and the second heating chamber. A telescopic rod is inserted at the end of the movable rod. The telescopic rod can extend and retract inside the movable rod. A spring is provided inside the telescopic rod. The spring connects the inside of the movable rod and the end of the telescopic rod. The spring inside the movable rod exerts a thrust on the telescopic rod, causing the telescopic rod to extend out of the inside of the movable rod.

[0011] Preferably, a limiting plate is fixed to the end of the telescopic rod, and a sleeve ring is sleeved on the surface of the limiting plate. The sleeve ring moves with the telescopic rod and is fixed to the surface of the pipe. First fixing rings are fixed to the surfaces of both ends of the pipe. Threaded holes are opened on the surface of the first fixing rings. Other equipment is connected to the end of the connecting pipe, and a insertion groove is opened at the end of the connecting pipe. The sleeve is inserted into the insertion groove and can move in the insertion groove. A spring is provided inside the insertion groove. The spring connects the inside of the insertion groove and the end of the sleeve. The spring inside the insertion groove exerts a pulling force on the sleeve, causing the sleeve to retract into the inside of the insertion groove.

[0012] Preferably, there are two sets of force-bearing plates, which are symmetrically fixed on the surface of the sleeve tube. The force-bearing plates move with the sleeve tube. The surfaces of the first heating chamber and the second heating chamber are fixed with top-holding plates. The surface of the top-holding plates is provided with through grooves, and the ends of the top-holding plates are provided with arc-shaped grooves. An elastic band is provided in the arc-shaped grooves, and the elastic band is elastic.

[0013] Preferably, an air cushion is provided in the arc-shaped groove. The interior of the air cushion is hollow. The end of the air cushion is connected to a horizontal tube. The interior of the horizontal tube is connected to the interior of the air cushion. An extension plate is fixed to the surface of the top plate. A sealing tube is provided at the end of the extension plate. The interior of the sealing tube is connected to the interior of the horizontal tube. Air inside the air cushion can enter the interior of the sealing tube through the horizontal tube.

[0014] Preferably, a limiting block is fixed to the end of the movable rod, and the limiting block moves with the movable rod. A U-shaped rod is fixed to the surface of the limiting block, and a spring is inserted into the end of the U-shaped rod. The spring can extend and retract inside the U-shaped rod. A connecting rod is provided on the surface of the spring. One end of the connecting rod is connected to the end of the U-shaped rod and the surface of the fixed plate. The spring exerts a pulling force on the U-shaped rod, so that the U-shaped rod is wrapped around the outside of the connecting rod.

[0015] Preferably, the bottom of the first heating chamber is fixed with a first base plate, the surface of the first base plate is fixed with a groove, a sliding plate is inserted into the surface of the groove, and the sliding plate can move on the surface of the groove. The bottom of the second heating chamber is fixed with a second base plate, and the bottom of the second base plate is provided with pulleys. Multiple sets of pulleys are provided, and the pulleys can roll on the bottom of the second base plate.

[0016] Preferably, the end of the sliding plate is connected to the surface of the second base plate, and the sliding plate moves with the second base plate, and the second heating chamber moves with the second base plate.

[0017] Preferably, a handle is fixed to the surface of the second heating chamber. Pulling the handle moves the second heating chamber away from the surface of the first heating chamber. A second fixing ring is fixed to the end of the sleeve. After the sleeve is sleeved on the surface of the two sets of pipes, the second fixing ring rests on the surface of the first fixing ring on the surface of the pipe. The first fixing ring and the second fixing ring can be fixed by a screw.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The snap-fit ​​groove proposed in this invention is provided with a top holding block for pushing the pipe, so that the two sets of pipes fit together tightly. The surfaces of the first heating chamber and the second heating chamber are provided with sealing strips to play a sealing role. After the first heating chamber and the second heating chamber are separated, the top holding plate no longer holds the surface of the force plate, so that the sleeve tube is retracted into the inside of the connecting pipe. The screws on the surfaces of the second fixing ring and the first fixing ring are removed, and the sleeve tube is retracted into the connecting pipe. The two sets of pipes can be separated, which facilitates the cleaning of carbon deposits inside the pipes. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure from another perspective of the present invention.

[0022] Figure 3 This is a schematic diagram of the first heated chamber structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the second heated chamber structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the pipeline structure of the present invention.

[0025] Figure 6 This is a schematic diagram of the top support plate structure of the present invention.

[0026] Figure 7 This is a schematic diagram of the connecting pipe structure of the present invention.

[0027] Figure 8 This is a schematic diagram of the connecting pipe of the present invention from another perspective.

[0028] Figure 9 This is a schematic diagram of the top support plate of the present invention from another perspective.

[0029] Figure 10 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0030] In the diagram: 1. First heating chamber; 2. Second heating chamber; 3. Pipe; 4. Snap-fit ​​groove; 5. Sealing strip; 6. Top support block; 7. Fixed plate; 8. Moving rod; 9. Telescopic rod; 10. Limiting plate; 11. First base plate; 12. Sliding groove; 13. Sliding plate; 14. Handle; 15. Pulley; 16. Second base plate; 17. Sleeve ring; 18. Top support plate; 19. First fixing ring; 20. Connecting pipe; 21. Through groove; 22. Arc groove; 23. Elastic band; 24. Sleeve pipe; 25. Force plate; 26. Insertion groove; 27. Second fixing ring; 28. Extension plate; 29. ​​Horizontal pipe; 30. Sealing pipe; 31. Inflatable cushion; 32. Limiting block; 33. U-shaped rod; 34. Spring; 35. Insertion rod. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 10 The present invention provides a technical solution:

[0033] Example 1: An energy-saving gas-fired condensing boiler that is easy to maintain includes: a first heating chamber 1, with a second heating chamber 2 at one end of the first heating chamber 1; a pipe 3, with a first fixing ring 19 at one end of the pipe 3, a top support plate 18 fixed to the surface of the first heating chamber 1, a sleeve 24 at one end of the pipe 3, a connecting pipe 20 at one end of the sleeve 24, an insertion groove 26 on the surface of the connecting pipe 20, a force-bearing plate 25 fixed to the surface of the sleeve 24; and an arc-shaped groove 22 on the surface of the top support plate 18. The top support plate 18 abuts against the surface of the force-bearing plate 25, so that the sleeve 24 extends out from the connecting pipe 20 and is sleeved on the surface of the two sets of pipes 3, and the force-bearing plate 25 can be inserted into the through groove 21. As the top support plate 18 continues to move, the elastic band 23 is stretched against the surface of the sleeve 24, so that the sleeve 24 abuts against the surface of the air cushion 31.

[0034] Example 2: Based on Example 1, a fixing plate 7 is fixed to the surface of the first heating chamber 1. The fixing plate 7 has threaded holes. A sealing strip 5 is provided on the surface of the first heating chamber 1. A snap-fit ​​groove 4 is provided on the surface of the first heating chamber 1. Multiple sets of top-holding blocks 6 are provided inside the snap-fit ​​groove 4. Two sets of pipes 3 are provided between the first heating chamber 1 and the second heating chamber 2. The pipes 3 can be placed in the snap-fit ​​groove 4, and the top-holding blocks 6 hold the surface of the pipes 3. After the first heating chamber 1 and the second heating chamber 2 are combined, the top-holding blocks 6 hold the surface of the pipes 3, causing the two sets of pipes 3 to fit together. Two sets of force-bearing plates 25 are fixed, symmetrically fixed to the surface of the sleeve tube 24. The force-bearing plates 25 move with the sleeve tube 24. Top-holding plates 18 are fixed to the surfaces of the first heating chamber 1 and the second heating chamber 2. The surface of the top support plate 18 is provided with a through groove 21, and the end of the top support plate 18 is provided with an arc-shaped groove 22. An elastic band 23 is provided in the arc-shaped groove 22. The elastic band 23 is elastic. An air cushion 31 is provided in the arc-shaped groove 22. The interior of the air cushion 31 is hollow. The end of the air cushion 31 is connected to a horizontal tube 29. The interior of the horizontal tube 29 is connected to the interior of the air cushion 31. An extension plate 28 is fixed to the surface of the top support plate 18. A sealing tube 30 is provided at the end of the extension plate 28. The interior of the sealing tube 30 is connected to the interior of the horizontal tube 29. The air inside the air cushion 31 can enter the interior of the sealing tube 30 through the horizontal tube 29. The sleeve tube 24 is supported on the surface of the air cushion 31, so that the air inside the air cushion 31 can enter the sealing tube 30 through the horizontal tube 29. The sealing tube 30 is supported between the connecting tube 20 and the force plate 25, and plays a sealing role for the insertion groove 26.

[0035] A movable rod 8 is inserted inside the first heating chamber 1 and the second heating chamber 2. The movable rod 8 can move inside the first heating chamber 1 and the second heating chamber 2. A telescopic rod 9 is inserted at the end of the movable rod 8. The telescopic rod 9 can extend and retract inside the movable rod 8. A spring is installed inside the telescopic rod 9, which connects the inside of the movable rod 8 and the end of the telescopic rod 9. The spring inside the movable rod 8 exerts a pushing force on the telescopic rod 9, causing the telescopic rod 9 to extend out of the inside of the movable rod 8. A limit block 32 is fixed at the end of the movable rod 8. The limit block 32 moves with the movable rod 8. For movement, a U-shaped rod 33 is fixed to the surface of the limiting block 32. A spring 34 is inserted into the end of the U-shaped rod 33. The spring 34 can extend and retract inside the U-shaped rod 33. A connecting rod 35 is provided on the surface of the spring 34. One end of the connecting rod 35 is connected to the end of the U-shaped rod 33 and the surface of the fixing plate 7. The spring 34 exerts a tension on the U-shaped rod 33, so that the U-shaped rod 33 is wrapped around the outside of the connecting rod 35. A first base plate 11 is fixed to the bottom of the first heating chamber 1. A sliding groove 12 is fixed to the surface of the first base plate 11. The surface of the sliding groove 12 is inserted into... A sliding plate 13 is attached to the second heating chamber 2, allowing it to move on the surface of the chute 12. A second base plate 16 is fixed to the bottom of the second heating chamber 2, and multiple sets of pulleys 15 are provided on the bottom of the second base plate 16, allowing them to roll on the bottom of the second base plate 16. The end of the sliding plate 13 is connected to the surface of the second base plate 16, and the sliding plate 13 moves with the second base plate 16, causing the second heating chamber 2 to move as well. A handle 14 is fixed to the surface of the second heating chamber 2; pulling the handle 14 causes the second heating chamber to move. 2. Move the second heating chamber 2 away from the surface of the first heating chamber 1. The end of the sleeve 24 is fixed with a second fixing ring 27. After the sleeve 24 is sleeved on the surface of the two sets of pipes 3, the second fixing ring 27 presses against the surface of the first fixing ring 19 on the surface of the pipe 3. The first fixing ring 19 and the second fixing ring 27 can be fixed by the screw. Remove the screw from the surface of the second fixing ring 27 and the first fixing ring 19, and the sleeve 24 is retracted into the connecting pipe 20. The two sets of pipes 3 can be separated, which is convenient for cleaning the carbon deposits inside the pipes 3.

[0036] A limiting plate 10 is fixed to the end of the telescopic rod 9. A sleeve ring 17 is sleeved on the surface of the limiting plate 10. The sleeve ring 17 moves with the telescopic rod 9 and is fixed to the surface of the pipe 3. First fixing rings 19 are fixed to the surfaces of both ends of the pipe 3. Threaded holes are opened on the surface of the first fixing rings 19. Other equipment is connected to the end of the connecting pipe 20. Insertion groove 26 is opened at the end of the connecting pipe 20. The sleeve 24 is inserted into the insertion groove 26 and can move in the insertion groove 26. A spring is provided inside the insertion groove 26. The spring connects the inside of the insertion groove 26 and the end of the sleeve 24. The spring inside the insertion groove 26 has a pulling force on the sleeve 24, so that the sleeve 24 is retracted into the inside of the insertion groove 26.

[0037] When cleaning the carbon deposits inside pipe 3, loosen the screws screwed to the surfaces of the first heating chamber 1 and the second heating chamber 2, causing the first heating chamber 1 and the second heating chamber 2 to separate. The sliding plate 13 moves in the sliding groove 12. A pulley 15 is provided at the bottom of the second heating chamber 2, allowing the second heating chamber 2 to move. After the second heating chamber 2 separates from the first heating chamber 1, the spring 34 pulls the U-shaped rod 33 so that the U-shaped rod 33 is sleeved on the surface of the plug rod 35. The moving rod 8 extends to the first heating chamber 1 and the second heating chamber 2. Between the first heating chamber 1 and the second heating chamber 2, a telescopic rod 9 extends from the moving rod 8. A sleeve ring 17 is suspended on the surface of the limiting plate 10 at the end of the telescopic rod 9. A pipe 3 is provided at the bottom of the sleeve ring 17, so that the pipe 3 is suspended between the first heating chamber 1 and the second heating chamber 2. The pipe 3 is pushed out from the snap-fit ​​groove 4 on the surface of the first heating chamber 1 and the second heating chamber 2. A push-holding block 6 is provided in the snap-fit ​​groove 4 to push the pipe 3, so that the two sets of pipes 3 are tightly fitted together, and the surfaces of the first heating chamber 1 and the second heating chamber 2 are... A sealing strip 5 is provided on the surface to provide a seal. After the first heating chamber 1 and the second heating chamber 2 are separated, the top holding plate 18 no longer presses against the surface of the force-bearing plate 25, allowing the sleeve tube 24 to retract into the connecting pipe 20. The screws on the surface of the second fixing ring 27 and the first fixing ring 19 are removed, and the sleeve tube 24 retracts into the connecting pipe 20. The two sets of pipes 3 can be separated, facilitating the cleaning of carbon deposits inside the pipes 3. When the first heating chamber 1 and the second heating chamber 2 approach each other, the top holding plate 18 presses against the surface of the force-bearing plate 25. The surface of plate 25 allows the sleeve 24 to extend from the connecting pipe 20 and be sleeved on the surface of the two sets of pipes 3. The force plate 25 can be inserted into the through groove 21. The supporting plate 18 continues to move, and the elastic band 23 is stretched against the surface of the sleeve 24, so that the sleeve 24 is held against the surface of the air cushion 31, so that the air inside the air cushion 31 enters the sealing pipe 30 through the horizontal pipe 29. The sealing pipe 30 is held between the connecting pipe 20 and the force plate 25, and plays a sealing role for the insertion groove 26.

[0038] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. An energy saving gas condensing boiler with ease of maintenance, characterized in that: include: The first heating chamber (1) is provided with a second heating chamber (2) at its end; Pipe (3), a first fixing ring (19) is provided at the end of pipe (3), a sleeve (24) is provided at the end of pipe (3), a connecting pipe (20) is provided at the end of sleeve (24), a insertion groove (26) is provided on the surface of connecting pipe (20), a force-bearing plate (25) is fixed on the surface of sleeve (24), a top holding plate (18) is fixed on the surface of the first heating chamber (1) and the second heating chamber (2), a through groove (21) is provided on the surface of top holding plate (18), and an arc groove (22) is provided at the end of top holding plate (18). An elastic band (23) is provided in (22), the elastic band (23) is elastic, an air cushion (31) is provided in the arc groove (22), the interior of the air cushion (31) is empty, the top plate (18) abuts against the surface of the force plate (25), so that the sleeve (24) extends out from the connecting pipe (20) and is sleeved on the surface of the two sets of pipes (3), and the force plate (25) can be inserted into the through groove (21). The top plate (18) continues to move, the elastic band (23) is stretched against the surface of the sleeve (24), so that the sleeve (24) abuts against the surface of the sleeve (24). The surface of the inflatable pad (31) is connected to the end of the inflatable pad (31) by a horizontal tube (29). The interior of the horizontal tube (29) is connected to the interior of the inflatable pad (31). An extension plate (28) is fixed to the surface of the top plate (18). A sealing tube (30) is provided at the end of the extension plate (28). The sealing tube (30) is held between the connecting tube (20) and the force plate (25). The interior of the sealing tube (30) is connected to the interior of the horizontal tube (29). Air inside the inflatable pad (31) can enter the interior of the sealing tube (30) through the horizontal tube (29). The end of the pipe (24) is fixed with a second fixing ring (27). After the pipe (24) is fitted onto the surface of the two sets of pipes (3), the second fixing ring (27) presses against the surface of the first fixing ring (19) on the surface of the pipe (3). The first fixing ring (19) and the second fixing ring (27) can be fixed by a screw. The screw on the surface of the second fixing ring (27) and the first fixing ring (19) is removed, and the pipe (24) is retracted into the connecting pipe (20). The two sets of pipes (3) can be separated, which is convenient for cleaning the carbon deposits inside the pipes (3).

2. A maintenance-friendly, energy-efficient gas condensing boiler according to claim 1, characterized in that: A fixing plate (7) is fixed on the surface of the first heating chamber (1). The surface of the fixing plate (7) is provided with threaded holes. A sealing strip (5) is provided on the surface of the first heating chamber (1). A snap-fit ​​groove (4) is provided on the surface of the first heating chamber (1). A top holding block (6) is provided inside the snap-fit ​​groove (4). Multiple sets of top holding blocks (6) are provided. A pipe (3) is provided between the first heating chamber (1) and the second heating chamber (2). Two sets of pipes (3) are provided. The pipes (3) can be placed in the snap-fit ​​groove (4), and the top holding block (6) holds the surface of the pipes (3). After the first heating chamber (1) and the second heating chamber (2) are combined, the top holding block (6) holds the surface of the pipes (3), so that the two sets of pipes (3) are attached together.

3. A maintenance-friendly, energy-efficient gas condensing boiler according to claim 2, characterized in that: A movable rod (8) is inserted inside the first heating chamber (1) and the second heating chamber (2). The movable rod (8) can move inside the first heating chamber (1) and the second heating chamber (2). A telescopic rod (9) is inserted at the end of the movable rod (8). The telescopic rod (9) can extend and retract inside the movable rod (8). A spring is provided inside the telescopic rod (9). The spring connects the inside of the movable rod (8) and the end of the telescopic rod (9). The spring inside the movable rod (8) has a pushing force on the telescopic rod (9), so that the telescopic rod (9) extends out of the inside of the movable rod (8).

4. The energy-saving gas-fired condensing boiler that is easy to maintain according to claim 3, characterized in that: The end of the telescopic rod (9) is fixed with a limiting plate (10). A sleeve ring (17) is sleeved on the surface of the limiting plate (10). The sleeve ring (17) moves with the telescopic rod (9). The sleeve ring (17) is fixed on the surface of the pipe (3). The two ends of the pipe (3) are fixed with a first fixing ring (19). The surface of the first fixing ring (19) is provided with a threaded hole. The end of the connecting pipe (20) is connected to other equipment. The end of the connecting pipe (20) is provided with a plug groove (26). The sleeve (24) is inserted into the plug groove (26). The sleeve (24) can move in the plug groove (26). A spring is provided inside the plug groove (26). The spring connects the inside of the plug groove (26) and the end of the sleeve (24). The spring inside the plug groove (26) has a pulling force on the sleeve (24), so that the sleeve (24) is retracted into the inside of the plug groove (26).

5. The energy-saving gas-fired condensing boiler that is easy to maintain according to claim 4, characterized in that: The force-bearing plate (25) is fixed in two sets. The two sets of force-bearing plates (25) are symmetrically fixed on the surface of the sleeve (24). The force-bearing plate (25) moves with the sleeve (24).

6. The energy-saving gas-fired condensing boiler that is easy to maintain according to claim 5, characterized in that: The end of the moving rod (8) is fixed with a limiting block (32). The limiting block (32) moves with the moving rod (8). A U-shaped rod (33) is fixed on the surface of the limiting block (32). A spring (34) is inserted into the end of the U-shaped rod (33). The spring (34) can extend and retract inside the U-shaped rod (33). A plug-in rod (35) is provided on the surface of the spring (34). One end of the plug-in rod (35) is connected to the end of the U-shaped rod (33) and the surface of the fixing plate (7). The spring (34) has a pulling force on the U-shaped rod (33), so that the U-shaped rod (33) is wrapped around the outside of the plug-in rod (35).

7. The energy-saving gas-fired condensing boiler that is easy to maintain according to claim 6, characterized in that: The bottom of the first heating chamber (1) is fixed with a first base plate (11), and a groove (12) is fixed on the surface of the first base plate (11). A sliding plate (13) is inserted into the surface of the groove (12). The sliding plate (13) can move on the surface of the groove (12). The bottom of the second heating chamber (2) is fixed with a second base plate (16). A pulley (15) is provided at the bottom of the second base plate (16). There are multiple sets of pulleys (15). The pulleys (15) can roll at the bottom of the second base plate (16).

8. The energy-saving gas-fired condensing boiler with easy maintenance according to claim 7, characterized in that: The end of the sliding plate (13) is connected to the surface of the second base plate (16). The sliding plate (13) moves with the second base plate (16), and the second heated chamber (2) moves with the second base plate (16).

9. An energy-saving gas-fired condensing boiler that is easy to maintain according to claim 8, characterized in that: A handle (14) is fixed to the surface of the second heating chamber (2). Pulling the handle (14) causes the second heating chamber (2) to move away from the surface of the first heating chamber (1).

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