Flue gas heating low-nitrogen burner

Abstract

The utility model relates to the field of combustors, and discloses a smoke heating low-nitrogen combustor which comprises a flue, a smoke inlet and a smoke outlet are formed in the two ends of the flue, the smoke inlet and the smoke outlet are provided with a first valve and a second valve respectively, a mixing part is rotationally connected in the flue and is in linkage with the first valve, and the mixing part is in linkage with the second valve. The first valve is in linkage with the second valve, the first valve is opened to drive the second valve to be closed, and the first valve is closed to drive the second valve to be opened. The two sides of the driving part are stacked to be provided with the outwards-protruding cambered surfaces, and when the driving part slides in a reciprocating mode, the curved surfaces on the two sides abut against the driven part in a reciprocating mode in sequence, so that the driven part cannot reset under the action of the spring, and the first valve is prevented from being closed when the rotating shaft rotates.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a flue gas heating low-nitrogen burner. Background Art

[0002] Flue gas heating low nitrogen burner is a highly efficient combustion technology. Through its special design structure, it can reduce nitrogen oxide emissions while improving combustion efficiency and stability.

[0003] The Chinese utility model patent with authorization announcement number CN216481073U discloses an implantable combustion flue gas heating device, including a combustion-supporting air main pipe, a gas main pipe, and multiple groups of premixed combustion components. Each group of premixed combustion components includes a combustion-supporting air branch pipe, a gas branch pipe, a premixing chamber, and a combustion distribution rod. One end of the combustion-supporting air branch pipe and the gas branch pipe is connected to the premixing chamber, the other end of the combustion-supporting air branch pipe is connected to the combustion-supporting air main pipe, and the other end of the gas branch pipe is connected to the gas main pipe. A combustion distribution rod is installed at the end of the premixing chamber, and multiple combustion distribution rods are embedded in the interior of the flue.

[0004] However, the above-mentioned prior art still has the following technical problems: the flue gas directly in contact with the flame has a higher temperature rise, while the flue gas far from the flame has a lower temperature rise, so the flue gas temperature is uneven. Utility Model Content

[0005] The utility model aims to provide a flue gas heating low nitrogen burner which has the effect of uniformly heating the flue gas.

[0006] The above technical purpose of the present utility model is achieved through the following technical solutions: a flue gas heating low-nitrogen burner, including a flue, a smoke inlet and a smoke outlet are provided at both ends of the flue, the smoke inlet and the smoke outlet are respectively provided with a first valve and a second valve, a mixing part is rotatably connected in the flue, the mixing part is linked to the first valve, the first valve is linked to the second valve, the first valve is opened to drive the second valve to close, and the first valve is closed to drive the second valve to open.

[0007] By adopting the above technical solution, a mixing part is set up, the mixing part rotates the mixed flue gas, and at the same time the mixing part drives the first valve to open and close, and the first valve drives the second valve to open and close, the purpose of uniformly mixing the flue gas in the flue and achieving uniform heating can be achieved.

[0008] The present invention is further configured as follows: the mixing part includes a motor, a rotating shaft and a stirring rod, the motor is installed on the outside of the flue, the rotating shaft is rotatably connected to the flue, the output end of the motor is connected to the rotating shaft, and the stirring rod is arranged on the rotating shaft.

[0009] By adopting the above technical solution and providing a stirring rod, the electrical appliance drives the rotating shaft to rotate, and the rotating shaft drives the stirring rod to rotate, thereby achieving the purpose of mixing the flue gas and making it evenly distributed.

[0010] The utility model is further configured as follows: a driving part is slidably connected to the flue near the first valve, the rotating shaft is linked to the driving part, the first valve and the second valve are slidably connected to the smoke inlet and the smoke outlet respectively, the first valve is provided with a driven part, and the motion trajectory of the driving part intersects with the driven part.

[0011] The present invention is further configured as follows: the driving part and the driven part are both configured as plates, and the end of the driving part close to the driven part is configured as an arc surface.

[0012] The utility model is further configured as follows: a crank is provided at the end of the rotating shaft close to the driving part, a connecting rod is hinged between the crank and the driving part, and curved surfaces convex outwardly toward the driven part are symmetrically provided at both ends of the driving part.

[0013] By adopting the above technical solution, the rotation of the shaft drives the driving part to swing back and forth in the flue through the crank and the connecting rod. The arc surface of the driving part squeezes the driven part during the movement, causing the driven part to move on the inner wall of the flue, thereby driving the first valve to open.

[0014] The present invention is further configured as follows: a spring is connected between the driven part and the inner wall of the flue.

[0015] By adopting the above technical solution and providing a spring, when the driven part is not subjected to external force, the spring naturally stretches and pushes the driven part out, and at this time the driven part drives the first valve to close tightly.

[0016] The present invention is further configured as follows: the stirring rod is provided with a plurality of through holes.

[0017] By adopting the above technical solution and setting a through hole, when the stirring rod mixes the flue gas in the flue, the gas can pass through the through hole, reducing the wind force driven by the stirring rod and preventing the wind force driven by the rotation of the stirring rod from blowing out the flame of the burner.

[0018] The utility model is further configured as follows: a fixed shaft is provided inside the flue, the fixed shaft is hinged with a first connecting rod, the distance between the first valve and the fixed shaft is equal to the distance between the second valve and the fixed shaft, and the two ends of the first connecting rod are respectively connected to the first valve and the second valve.

[0019] The utility model is further configured as follows: the inner walls of the flue located at the first valve and the second valve are both slidably connected with a second connecting rod, and the two ends of the second connecting rod are respectively connected to the valve and the first connecting rod.

[0020] By adopting the above technical solution and providing the first connecting rod and the second connecting rod, the purpose of linkage between the first valve and the second valve can be achieved.

[0021] The present invention is further configured as follows: a temperature sensor is provided in the flue, a controller is provided outside the flue, and the controller, the temperature sensor, and the motor are electrically connected.

[0022] The beneficial effect of the utility model is that by setting the driving part and the driven part, the two sides of the driving part are stacked to form an outward convex arc surface, and when the driving part slides back and forth, the curved surfaces on both sides successively and reciprocally abut against the driven part, so that the driven part will not be reset under the action of the spring, thereby preventing the first valve from closing when the rotating shaft rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a top view of the overall structure of the utility model.

[0025] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at the first connecting rod.

[0026] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure at the first valve.

[0027] In the figure, 1. flue; 11. smoke inlet; 12. smoke outlet; 13. driving part; 14. fixed shaft; 141. first connecting rod; 15. second connecting rod; 16. temperature sensor; 17. controller; 2. first valve; 21. driven part; 211. spring; 3. mixing part; 31. motor; 32. rotating shaft; 321. crank; 322. connecting rod; 33. stirring rod; 331. through hole; 4. second valve. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0029] Embodiment, a flue gas heating low nitrogen burner, such as Figure 1-Figure 3 As shown, it includes a flue 1, a smoke inlet 11 and a smoke outlet 12 are respectively provided at both ends of the flue 1, the smoke inlet 11 and the smoke outlet 12 are respectively slidably connected to the first valve 2 and the second valve 4, the upper ends of the flue 1 located at the smoke inlet 11 and the smoke outlet 12 are respectively slidably connected to the second connecting rod 15, the ends of the second connecting rod 15 close to the valves are hinged to the valves, a fixed shaft 14 is provided at the midpoint of the inner wall of the flue 1 perpendicular to the inner wall where the smoke inlet 11 and the smoke outlet 12 are located, and a first connecting rod 141 is hinged to the fixed shaft 14. The distances between the two ends of 141 and the fixed axis 14 are equal. The two ends of the first connecting rod 141 are hinged to the second connecting rods 15 at both ends. A temperature sensor 16 is provided inside the flue 1. A motor 31 and a controller 17 are installed outside the flue 1. The controller 17, the motor 31, and the temperature sensor 16 are electrically connected. The flue 1 is rotatably connected to a rotating shaft 32. The rotating shaft 32 is provided in the flue 1, and the output end of the motor 31 is coaxially connected to the end of the rotating shaft 32. A plurality of stirring rods 33 are provided on the rotating shaft 32, and a plurality of through holes 331 are opened on the stirring rod 33.

[0030] Further, such as Figure 1-Figure 3 As shown, the first valve 2 is connected to the driven part 21, which is configured as a plate. The inner wall of the flue 1 is slidably connected to the driven part 21 near the driven part 21. The driving part 13 is also configured as a plate, and arc-shaped convex surfaces are symmetrically provided on one side of both ends of the driving part 13 near the driven part 21. The motion trajectory of the arc-shaped convex surface of the driving part 13 intersects with the plate of the driven part 21, and the inner distance between the arc-shaped convex surfaces on both sides of the driving part 13 is greater than the width of the plate of the driven part 21. A crank 321 is provided at the end of the rotating shaft 32 near the driving part 13, and a connecting rod 322 is hinged between the crank 321 and the driving part 13. A spring 211 is connected between the driven part 21 and the inner wall of the flue 1.

[0031] Its working principle is as follows: the rotation of the motor 31 drives the rotating shaft 32 and the stirring rod 33 to rotate, mixing the flue gas in the flue 1. At this time, the rotating shaft 32 drives the driving part 13 to do reciprocating motion. Under the drive of the convex arc surfaces on both sides of the driving part 13, the driven part 21 is squeezed, the spring 211 is deformed by force, the first valve 2 opens, and the first valve 2 drives the second valve 4 to close. The flue gas continues to enter the flue 1 from the smoke inlet 11. When the temperature in the flue 1 reaches a certain value, the temperature sensor 16 transmits an electrical signal to the controller 17, and the controller 17 controls the motor 31 to stop rotating. At this time, the spring 211 recovers its deformation and pulls the first valve 2 to close. The first valve 2 drives the second valve 4 to open, and the flue gas is sent out from the smoke outlet 12. When the temperature in the flue 1 is too low, the sensor transmits an electrical signal to the controller 17, and the controller 17 controls the motor 31 to rotate, and repeats the above operation.

Claims

1. A flue gas heating low nitrogen burner, comprising a flue (1), characterized in that: The flue (1) is provided with a smoke inlet (11) and a smoke outlet (12) at both ends. The smoke inlet (11) and the smoke outlet (12) are respectively provided with a first valve (2) and a second valve (4). A mixing part (3) is rotatably connected in the flue (1). The mixing part (3) is linked to the first valve (2). The first valve (2) is linked to the second valve (4). When the first valve (2) is opened, the second valve (4) is driven to be closed. When the first valve (2) is closed, the second valve (4) is driven to be opened.

2. The flue gas heating low nitrogen burner according to claim 1, characterized in that: The mixing part (3) comprises a motor (31), a rotating shaft (32) and a stirring rod (33); the motor (31) is mounted on the outside of the flue (1); the rotating shaft (32) is rotatably connected to the flue (1); the output end of the motor (31) is connected to the rotating shaft (32); and the stirring rod (33) is arranged on the rotating shaft (32).

3. The flue gas heating low nitrogen burner according to claim 2, characterized in that: The flue (1) is slidably connected to a driving part (13) near the first valve (2), the rotating shaft (32) is linked to the driving part (13), the first valve (2) and the second valve (4) are slidably connected to the smoke inlet (11) and the smoke outlet (12), respectively, the first valve (2) is provided with a driven part (21), and the motion trajectory of the driving part (13) intersects with the driven part (21).

4. The flue gas heating low nitrogen burner according to claim 3, characterized in that: The driving part (13) and the driven part (21) are both configured as plates, and the end of the driving part (13) close to the driven part (21) is configured as an arc-shaped surface.

5. The flue gas heating low nitrogen burner according to claim 4, characterized in that: A crank (321) is provided at the end of the rotating shaft (32) close to the driving part (13), a connecting rod (322) is hinged between the crank (321) and the driving part (13), and curved surfaces convex outwardly in the direction of the driven part (21) are symmetrically provided at both ends of the driving part (13).

6. The flue gas heating low nitrogen burner according to claim 5, characterized in that: A spring (211) is connected between the driven part (21) and the inner wall of the flue (1).

7. The flue gas heating low nitrogen burner according to claim 6, characterized in that: The stirring rod (33) is provided with a plurality of through holes (331).

8. The flue gas heating low nitrogen burner according to claim 7, characterized in that: A fixed shaft (14) is provided inside the flue (1), and a first connecting rod (141) is hinged to the fixed shaft (14). The distance between the first valve (2) and the fixed shaft (14) is equal to the distance between the second valve (4) and the fixed shaft (14). Both ends of the first connecting rod (141) are respectively connected to the first valve (2) and the second valve (4).

9. The flue gas heating low nitrogen burner according to claim 8, characterized in that: The flue (1) is slidably connected to the inner walls of the first valve (2) and the second valve (4) with a second connecting rod (15), and the two ends of the second connecting rod (15) are respectively connected to the valve and the first connecting rod (322).

10. The flue gas heating low nitrogen burner according to claim 9, characterized in that: A temperature sensor (16) is provided inside the flue (1), and a controller (17) is provided outside the flue (1). The controller (17), the temperature sensor (16), and the motor (31) are electrically connected.

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