Horizontal condensation gas normal pressure hot water boiler

Abstract

The invention discloses a horizontal condensation fuel gas normal pressure hot water boiler, and relates to the technical field of normal pressure hot water boilers, the horizontal condensation fuel gas normal pressure hot water boiler comprises a tank body communicated with a boiler flue gas channel, one end of the tank body is provided with a gas inlet, the heat exchange pipeline comprises a plurality of groups of annular pipes arranged in the tank body, through holes are symmetrically formed in the two end faces of each annular pipe, and the through holes are communicated with the gas inlet. Partition plates are fixedly arranged in the annular pipes and located between the two sets of through holes, and a connecting pipe is fixedly communicated between the two sets of annular pipes. Through the arrangement of the annular pipe and the partition plate, the water flowing speed is reduced, and therefore the heat exchange effect is improved; and through reciprocating flowing of the flue gas, the contact duration of the flue gas and the heat exchange pipeline is further prolonged, so that heat in the flue gas can be fully absorbed by the heat exchange pipeline, and heat loss caused by insufficient heat exchange is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of atmospheric pressure hot water boilers, in particular to a horizontal condensing gas atmospheric pressure hot water boiler. Background Art

[0002] Horizontal condensing gas-fired atmospheric pressure hot water boiler is a highly efficient and environmentally friendly heating equipment. It recovers the sensible heat and latent heat in the flue gas through condensation technology, significantly improving the thermal efficiency, usually exceeding 100%. This boiler is designed to operate at normal pressure, safe and reliable, without explosion risk, and equipped with a variety of safety protection devices to ensure stable operation. The boiler adopts low-nitrogen combustion technology to reduce harmful gas emissions and meet environmental protection standards. It is suitable for a variety of places, such as residences, bathing centers, etc., to provide heating and domestic hot water;

[0003] Horizontal condensing atmospheric pressure hot water boilers often use straight tubes, spiral tubes or bellows for heat exchange. Straight tubes are prone to fast flow and insufficient heat exchange, while spiral tubes and bellows can improve heat exchange efficiency but are not easy to clean. Summary of the invention

[0004] The object of the present invention is to provide a horizontal condensing gas-fired atmospheric pressure hot water boiler to solve at least one technical problem existing in the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: a horizontal condensing gas-fired atmospheric pressure hot water boiler, comprising a tank body communicating with a boiler flue gas passage, an air inlet being provided at one end of the tank body, and further comprising:

[0006] The heat exchange pipeline comprises a plurality of groups of annular tubes arranged inside the tank body, through holes are symmetrically opened on both end surfaces of the annular tubes, a partition is fixedly arranged inside the annular tubes between two groups of through holes, and a connecting pipe is fixedly connected between the two groups of the annular tubes.

[0007] Preferably, a reflux channel is provided between the multiple groups of annular tubes, and the reflux channel includes a barrel provided on the end faces of the multiple groups of annular tubes, and the end of the barrel is close to the surface of the annular tube, the inner ring contact surface of the annular tube is located in the barrel, and the end face of a group of barrels close to the air inlet position is fixedly connected with a closed tube, multiple groups of fixing frames are fixedly provided on the outside of the barrel, and the end of the fixing frame is fixedly connected to the inner wall of the tank body, and the closed tube passes through the tank body and is connected with the exhaust gas exhaust pipe.

[0008] Preferably, multiple groups of cleaning rings are sleeved on the outside of the annular tube, and the inner walls of the cleaning rings fit the outer wall of the annular tube. Circular hoops are fixed on the outer sides of the multiple groups of cleaning rings, and the cleaning rings can slide on the surface of the annular tube to clean the smoke and dust on the annular tube.

[0009] Preferably, a plurality of sets of fixing seats are fixedly provided on the outer side of the circular hoop, the tops of the plurality of sets of fixing seats are rotatably connected with blades, a shaft cover is fixedly provided on the top of the fixing seat, and a disc spring is fixedly provided between the shaft cover and the connecting shaft of the blade.

[0010] Preferably, the end of the blade is fixedly connected to a guide rod, a plurality of sets of fixing blocks are fixedly provided on the outer side of the barrel, the outer side of the fixing block is fixedly connected to a surrounding plate via an extension plate, and a limiting groove is formed between the surrounding plate and the fixing block.

[0011] Preferably, a baffle is fixedly provided on the outer side of the barrel, and the baffle can contact with the blade to limit its rotation angle, and the baffle and the fixing rod are located at opposite ends of the blade.

[0012] Preferably, a first fixing plate is fixedly provided on the outer side of the bobbin, and a limiting rod is fixedly provided on one side of the first fixing plate, a second fixing plate is fixedly provided on the circular hoop, and the second fixing plate is sleeved with the limiting rod, a return spring is sleeved on the outer side of the limiting rod, and both ends of the return spring are in contact with the first fixing plate and the second fixing plate respectively.

[0013] Preferably, two groups of limiting rings are fixedly provided on the outer sides of the multiple groups of cleaning rings on one group of the annular tubes, and the two groups of limiting rings are symmetrically arranged, and the ends of the bobbins are plugged into the limiting rings.

[0014] Preferably, an end cap is fixedly connected to one end of the tank body.

[0015] Preferably, the two groups of connecting pipes located at the head and tail ends penetrate the tank body and are connected to the external water inlet and outlet systems.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The setting of annular tubes and baffles can slow down the speed of water flow to improve the heat exchange effect; the reciprocating flow of flue gas further increases the contact time between flue gas and heat exchange pipe, so that the heat in the flue gas can be fully absorbed by the heat exchange pipe, reducing the heat loss caused by insufficient heat exchange;

[0018] The cleaning ring reciprocates along the surface of the annular tube, and during its movement, it continuously cleans the surface of the annular tube. By cleaning the smoke and dust attached to the surface of the annular tube, the heat in the smoke can be more efficiently transferred to the water through the pipe, thereby improving the heat absorption effect and avoiding the decrease in heat exchange rate caused by smoke and dust attachment after long-term use. At the same time, it can reduce equipment energy consumption and save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2It is a structural schematic diagram of the heat exchange pipeline in the present invention;

[0021] Figure 3 is a cross-sectional view of the annular tube in the present invention;

[0022] Figure 4 is a cross-sectional view of the tank body of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the fixing seat in the present invention;

[0024] Figure 6 It is a structural schematic diagram of the fixing block in the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the return spring in the present invention;

[0026] In the figure: 1. tank body; 2. air inlet; 3. end cover; 4. annular tube; 5. through hole; 6. inclined plate; 7. connecting tube; 8. bobbin; 9. closing tube; 10. fixing frame; 11. cleaning ring; 12. round hoop; 13. fixing seat; 14. paddle; 15. shaft cover; 16. disc spring; 17. baffle; 18. guide rod; 19. fixing block; 20. enclosure; 21. limiting groove; 22. first fixing plate; 23. arc rod; 24. second fixing plate; 25. reset spring; 26. limiting ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] Reference Figure 1-Figure 2 , provides a horizontal condensing gas-fired atmospheric pressure hot water boiler, comprising a tank body 1 communicating with a boiler flue gas passage, an air inlet 2 being provided at one end of the tank body 1, and further comprising:

[0030] The heat exchange pipeline includes a plurality of groups of annular tubes 4 arranged inside the tank body 1, through holes 5 are symmetrically opened on both end surfaces of the annular tubes 4, a partition plate 6 is fixedly provided between two groups of through holes 5 inside the annular tubes 4, and a connecting pipe 7 is fixedly connected between the two groups of annular tubes 4.

[0031] An end cover 3 is fixedly connected to one end of the tank body 1 .

[0032] Two groups of connecting pipes 7 at the head and tail ends penetrate the tank body 1 and are connected to the external water inlet and outlet systems.

[0033] The flue gas enters the tank body 1 through the air inlet 2 and exchanges heat with the water in the heat exchange pipe. Since the connecting pipe 7 at the end is connected to the water inlet and outlet systems, water enters the heat exchange pipe from a group of connecting pipes 7. After the water passes through the through hole 5 on the first end face of the annular pipe 4, the partition 6 separates the through holes 5 on the two end faces of the annular pipe 4, so that the water flows in the annular cavity for one circle before passing through the through hole 5 on the second end face to enter the next group of connecting pipes 7. The setting of the annular pipe 4 and the partition 6 can slow down the speed of water flow, so that the water can have a longer heat exchange time during the heat exchange process to improve the heat exchange effect.

[0034] Example 2

[0035] Reference Figure 1-Figure 2 On the basis of the above-mentioned embodiment 1, the path of the flue gas flowing in the tank body 1 is extended so that the flue gas is fully in contact with the heat exchange pipe, as follows:

[0036] A reflux channel is provided between the multiple groups of annular tubes 4, and the reflux channel includes a barrel 8 arranged on the end faces of the multiple groups of annular tubes 4, and the end of the barrel 8 is close to the surface of the annular tube 4, and the inner ring contact surface of the annular tube 4 is located in the barrel 8. The end face of a group of barrels 8 near the air inlet 2 is fixedly connected with a closed tube 9, and multiple groups of fixing frames 10 are fixedly provided on the outside of the barrel 8, and the end of the fixing frame 10 is fixedly connected to the inner wall of the tank body 1, and the closed tube 9 passes through the tank body 1 and is connected with the exhaust gas exhaust pipe.

[0037] The setting of the closed tube 9 prevents the flue gas from entering the inner circle of the annular tube 4 when it flows from the air inlet 2 toward the end cover 3. During this process, the flue gas contacts and exchanges heat with the heat exchange pipe for the first time. When the flue gas flows to the rear end of the tank body 1, it circulates and flows into the barrel 8 and flows toward the closed tube 9. When the flue gas flows in multiple groups of barrels 8, the flue gas contacts and exchanges heat with the heat exchange pipe for a second time. The flue gas after the secondary heat exchange is discharged after passing through the closed tube 9. The reciprocating flow of the flue gas further increases the contact time between the flue gas and the heat exchange pipe, so that the heat in the flue gas can be fully absorbed by the heat exchange pipe, thereby reducing the heat loss caused by insufficient heat exchange.

[0038] In this embodiment, the surface shape of the end cover 3 is preferably an arc. When the end cover 3 is set to an arc, the flue gas flowing to the rear end of the tank body 1 can be guided through the inner wall of the end cover 3 and better flow into the barrel 8, further ensuring the heat exchange efficiency.

[0039] In one of the more preferred embodiments, an exhaust device may be added to the end of the closed tube 9 to improve the flow effect of the smoke into the reflow channel.

[0040] Example 3

[0041] Reference Figure 1-Figure 7On the basis of the above-mentioned second embodiment, a cleaning mechanism is provided on the outer side of the annular tube 4 to improve the heat exchange effect of the heat exchange pipe after long-term use.

[0042] Multiple groups of cleaning rings 11 are sleeved on the outside of the annular tube 4, and the inner walls of the cleaning rings 11 fit the outer wall of the annular tube 4. Circular hoops 12 are fixed on the outer sides of the multiple groups of cleaning rings 11. The cleaning rings 11 can slide on the surface of the annular tube 4 to clean the smoke and dust on the annular tube 4.

[0043] A plurality of fixing seats 13 are fixedly provided on the outside of the circular hoop 12 , and the tops of the plurality of fixing seats 13 are all rotatably connected with blades 14 . A shaft cover 15 is fixedly provided on the top of the fixing seat 13 , and a disc spring 16 is fixedly provided between the shaft cover 15 and the connecting shaft of the blade 14 .

[0044] The end of the blade 14 is fixedly connected to a guide rod 18 , a plurality of sets of fixing blocks 19 are fixedly provided on the outside of the barrel 8 , a surrounding plate 20 is fixedly connected to the outside of the fixing block 19 via an extension plate, and a limiting groove 21 is formed between the surrounding plate 20 and the fixing block 19 .

[0045] A first fixing plate 22 is fixedly provided on the outside of the bobbin 8, and a limiting rod 23 is fixedly provided on one side of the first fixing plate 22. A second fixing plate 24 is fixedly provided on the circular hoop 12, and the second fixing plate 24 is sleeved with the limiting rod 23. A return spring 25 is sleeved on the outside of the limiting rod 23, and both ends of the return spring 25 are in contact with the first fixing plate 22 and the second fixing plate 24 respectively.

[0046] Driven by the disc spring 16, the blade 14 has a certain rotation angle in the initial state to ensure that the bottom end of the fixing rod is located at the fixed side;

[0047] When the smoke enters the tank body 1, the flow of the smoke generates wind force, and the angle of the blade 14 is set so that the blade 14 can move after contacting the airflow, so that the blade 14 drives the multiple groups of cleaning rings 11 to move along the axis of the tank body 1 through the hoop 12. When the cleaning ring 11 slides in the first direction, its inner wall scrapes off the smoke and dust on the surface of the annular tube 4. The first direction is Figure 5 In the direction indicated by the arrow, the paddle 14 is also driven to rotate along the axis of the tank body 1 during this process. At this time, the guide rod 18 is driven to slide from the side of the fixing block 19 to the front of the fixing block 19, and the outer side of the guide rod 18 contacts the front of the fixing block 19. The paddle 14 is driven to rotate around the connecting axis in the second direction by a deflection angle. The second direction is as shown in FIG. Figure 6 In the direction indicated by the middle arrow, due to the further deflection of the blade 14, the influence of the wind on the blade 14 increases, and at the same time, the round hoop 12 drives the second fixing plate 24 to squeeze the return spring 25 during the movement;

[0048] like Figure 5As shown, the guide rod 18 pulls the disc spring 16 when it deflects an angle. When the guide rod 18 moves to pass over the A surface of the fixed block 19, the return spring 25 can no longer be compressed. At the same time, since the guide rod 18 is no longer in contact with the fixed block 19 and is limited, at the moment when the guide rod 18 passes over the A surface, the disc spring 16 drives the blade 14 to rotate an angle so that the bottom end of the guide rod 18 contacts the A surface. At this time, the return spring 25 extends, and the return spring 25 pushes the hoop 12 to move in the third direction, which is opposite to the first direction. Due to the resistance of the guide rod 18 to the A surface, when the hoop 12 rotates in the third direction, the blade 14 rotates around the connecting axis in the fourth direction, which is opposite to the second direction. Direction, during the rotation of the blade 14, the bottom end of the guide rod 18 slides along the A surface into the limiting groove 21. When the guide rod 18 is located at the corner of the limiting groove 21, the blade 14 rotates to be parallel to the flow direction of the smoke. Due to the limitation of the guide rod 18 by the tail plate, the blade 14 cannot continue to rotate. At this time, the wind force has little effect on the blade 14, and the resistance of the return spring 25 is reduced, and the hoop 12 is instantly pushed to move in the third direction. During the movement, the guide rod 18 moves in the limiting groove 21 to keep the state of the blade 14 during the movement. When the guide rod 18 moves to the end of the limiting groove 21, the hoop 12 is completely reset, and the disc spring 16 drives the blade 14 back to the initial state;

[0049] The cleaning ring 11 is driven by the above-mentioned mechanism to reciprocate along the surface of the annular tube 4. During its movement, the surface of the annular tube 4 is continuously cleaned. By cleaning the smoke and dust attached to the surface of the annular tube 4, the heat in the smoke can be more efficiently transferred to the water by the pipeline, thereby improving the heat absorption effect and avoiding the decrease in heat exchange rate caused by smoke and dust attachment after long-term use. At the same time, it can reduce equipment energy consumption and save energy.

[0050] In this embodiment, the cleaning rings 11 are preferably equidistantly arranged on the outside of the annular tube 4, so that when multiple groups of cleaning rings 11 slide on the outside of the annular tube 4, the annular tube 4 can be cleaned evenly, thereby avoiding the problem of uneven heat exchange in the heat exchange pipeline.

[0051] In one of the more preferred embodiments, a baffle 17 is fixedly provided on the outer side of the barrel 8 , and the baffle 17 can contact with the blade 14 to limit its rotation angle, and the baffle 17 and the fixing rod are located at opposite ends of the blade 14 .

[0052] When the blade 14 is in the initial state, the baffle 17 blocks one side of the blade 14 to prevent the blade 14 from rotating in the third direction, so as to ensure the cleaning effect of the cleaning ring 11 .

[0053] In one of the more preferred embodiments, two groups of limit rings 26 are fixedly provided on the outer side of the multiple groups of cleaning rings 11 located on a group of annular tubes 4, and the two groups of limit rings 26 are symmetrically arranged, and the end of the barrel 8 is plugged into the limit ring 26, and the setting of the return channel enables the airflow to better drive the contact with the blade 14.

[0054] By plugging the barrel 8 into the limiting ring 26 , the cleaning ring 11 can rotate more stably. Meanwhile, a sealing member can be provided between the limiting ring 26 and the annular tube 4 , thereby better controlling the flow direction of the airflow in the tank body 1 .

[0055] The flue gas with heat in the boiler enters the tank body 1 through the air inlet 2 and exchanges heat with the water in the heat exchange pipe. Since the connecting pipe 7 at the end is connected with the water inlet and outlet system, the water enters the heat exchange pipe from a group of connecting pipes 7. After the water passes through the through hole 5 on the first end face of the annular pipe 4, the partition 6 separates the through holes 5 on the two end faces of the annular pipe 4, so that the water flows in the inner cavity of the annular pipe 4 for one circle before passing through the through hole 5 on the second end face to enter the next group of connecting pipes 7. The setting of the annular pipe 4 and the partition 6 can slow down the speed of water flow, so that the water can have a longer heat exchange time during the heat exchange process, so as to improve the heat exchange effect.

[0056] During the heat exchange process of flue gas flow, due to the setting of the closed tube 9, when the flue gas flows from the air inlet 2 to the end cover 3, it will not enter the inner circle of the annular tube 4. In this process, the flue gas contacts and exchanges heat with the heat exchange pipe for the first time. When the flue gas flows to the tail end of the tank body 1, it rotates and flows into the barrel 8 and flows toward the closed tube 9. When the flue gas flows in multiple groups of barrels 8, the flue gas contacts and exchanges heat with the heat exchange pipe for the second time. The flue gas after the second heat exchange is discharged after passing through the closed tube 9. The reciprocating flow of the flue gas further increases the contact time between the flue gas and the heat exchange pipe, so that the heat in the flue gas can be fully absorbed by the heat exchange pipe, reducing the heat loss caused by insufficient heat exchange, and the arc shape of the end cover guides the flue gas flow direction into the barrel 8;

[0057] Driven by the disc spring 16, the blade 14 has a certain rotation angle in the initial state to ensure that the bottom end of the fixing rod is located at the fixed side;

[0058] When the flue gas flows between the return channel and the tank body 1, the flow of the flue gas generates wind force, so that the blades 14 can move after contacting the airflow, so that the blades 14 drive the multiple groups of cleaning rings 11 to move along the axis of the tank body 1 through the hoop 12. When the cleaning rings 11 slide in the first direction, the inner wall thereof scrapes off the smoke and dust on the surface of the annular tube 4. The first direction is Figure 5In the direction indicated by the arrow, the paddle 14 is also driven to rotate along the axis of the tank body 1 during this process. At this time, the guide rod 18 is driven to slide from the side of the fixing block 19 to the front of the fixing block 19, and the outer side of the guide rod 18 contacts the front of the fixing block 19. The paddle 14 is driven to rotate around the connecting axis in the second direction by a deflection angle. The second direction is as shown in FIG. Figure 6 In the direction indicated by the middle arrow, due to the further deflection of the blade 14, the influence of the wind on the blade 14 increases, and at the same time, the round hoop 12 drives the second fixing plate 24 to squeeze the return spring 25 during the movement;

[0059] like Figure 5 As shown, the guide rod 18 pulls the disc spring 16 when it deflects an angle. When the guide rod 18 moves to the A surface beyond the fixing block 19, the return spring 25 can no longer be compressed. At the same time, since the guide rod 18 is no longer in contact with the fixing block 19 and is limited, at the moment when the guide rod 18 passes the A surface, the disc spring 16 drives the blade 14 to rotate an angle, so that the bottom end of the guide rod 18 contacts the A surface. At this time, the return spring 25 stretches, and the return spring 25 pushes the hoop 12 to move in the third direction, which is opposite to the first direction. Due to the resistance of the guide rod 18 to the A surface, when the hoop 12 rotates in the third direction, the blade 14 rotates around the connecting axis in the fourth direction, which is opposite to the second direction. During the rotation of the blade 14, the bottom end of the guide rod 18 slides along the A surface into the limiting groove 21. When the guide rod 18 is located at the corner of the limiting groove 21, the blade 14 rotates to be parallel to the flow direction of the smoke. Due to the limitation of the guide rod 18 by the tail plate, the blade 14 cannot continue to rotate. At this time, the wind force has little effect on the blade 14. The resistance of the return spring 25 is reduced, and the hoop 12 is instantly pushed to move in the third direction. During the movement, the guide rod 18 moves in the limiting groove 21 to maintain the state of the blade 14 during the movement. When the guide rod 18 moves to the end of the limiting groove 21, the hoop 12 is completely reset, and the disc spring 16 drives the blade 14 back to the initial state to prepare for the next cycle action.

[0060] The cleaning ring 11 is driven by the above-mentioned mechanism to reciprocate along the surface of the annular tube 4. During its movement, the surface of the annular tube 4 is continuously cleaned. By cleaning the smoke and dust attached to the surface of the annular tube 4, the heat in the smoke can be more efficiently transferred to the water by the pipeline, thereby improving the heat absorption effect and avoiding the decrease in heat exchange rate caused by smoke and dust attachment after long-term use. At the same time, it can reduce equipment energy consumption and save energy.

[0061] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal condensing gas-fired atmospheric pressure hot water boiler, comprising a tank body (1) communicating with a boiler flue gas passage, wherein one end of the tank body (1) is provided with an air inlet (2), characterized in that: Also includes: A heat exchange pipeline, the heat exchange pipeline comprising a plurality of groups of annular tubes (4) arranged inside a tank body (1), through holes (5) being symmetrically opened on both end surfaces of the annular tubes (4), a partition plate (6) being fixedly provided inside the annular tubes (4) between two groups of through holes (5), and a connecting pipe (7) being fixedly connected between two groups of the annular tubes (4).

2. The horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 1, characterized in that: A reflux channel is provided between the plurality of groups of annular tubes (4), the reflux channel comprising a tube (8) provided on the end faces of the plurality of groups of annular tubes (4), and the end of the tube (8) is close to the surface of the annular tube (4), the end face of a group of tubes (8) whose inner ring contact surface is located in the tube (8) close to the air inlet (2) is fixedly connected to a closed tube (9), a plurality of fixing frames (10) are fixedly provided on the outer side of the tube (8), and the end of the fixing frame (10) is fixedly connected to the inner wall of the tank body (1), and the closed tube (9) passes through the tank body (1) and is connected to the exhaust gas discharge pipeline.

3. The horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 2, characterized in that: A plurality of cleaning rings (11) are sleeved on the outer side of the annular tube (4), and the inner walls of the cleaning rings (11) are in contact with the outer walls of the annular tube (4). Circular hoops (12) are fixedly provided on the outer sides of the plurality of cleaning rings (11). The cleaning rings (11) can slide on the surface of the annular tube (4) to clean the smoke and dust on the annular tube (4).

4. The horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 3, characterized in that: A plurality of sets of fixing seats (13) are fixedly provided on the outer side of the circular hoop (12), the tops of the plurality of sets of fixing seats (13) are all rotatably connected with blades (14), a shaft cover (15) is fixedly provided on the top of the fixing seat (13), and a disc spring (16) is fixedly provided between the shaft cover (15) and the connecting shaft of the blade (14).

5. The horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 4, characterized in that: The end of the blade (14) is fixedly connected to a guide rod (18), a plurality of groups of fixing blocks (19) are fixedly provided on the outside of the barrel (8), the outside of the fixing block (19) is fixedly connected to a surrounding plate (20) via an extension plate, and a limiting groove (21) is formed between the surrounding plate (20) and the fixing block (19).

6. The horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 5, characterized in that: A baffle (17) is fixedly provided on the outer side of the barrel (8), and the baffle (17) can contact the blade (14) to limit its rotation angle, and the baffle (17) and the fixing rod are located at two opposite ends of the blade (14).

7. The horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 6, characterized in that: A first fixing plate (22) is fixedly provided on the outer side of the bobbin (8), and a limiting rod (23) is fixedly provided on one side of the first fixing plate (22). A second fixing plate (24) is fixedly provided on the circular hoop (12), and the second fixing plate (24) is sleeved with the limiting rod (23). A return spring (25) is sleeved on the outer side of the limiting rod (23), and two ends of the return spring (25) are respectively in contact with the first fixing plate (22) and the second fixing plate (24).

8. The horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 2 or 7, characterized in that: Two groups of limiting rings (26) are fixedly arranged on the outer sides of the multiple groups of cleaning rings (11) on a group of the annular tubes (4), and the two groups of limiting rings (26) are symmetrically arranged, and the end of the barrel (8) is plugged into the limiting ring (26).

9. The horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 1, characterized in that: An end cover (3) is fixedly connected to one end of the tank body (1).

10. The horizontal condensing gas-fired atmospheric pressure hot water boiler according to claim 1, characterized in that: The two groups of connecting pipes (7) located at the head and tail ends penetrate the tank body (1) and are connected to the external water inlet and outlet systems.

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