Porous medium burner with adjustable air-fuel ratio and adopting rotary split structure

Abstract

The invention discloses an adjustable air-fuel ratio porous medium combustor adopting a rotary split structure, and relates to the field of combustors. According to the scheme, the combustor comprises a premixing pipe, a spiral gas mixing pipe, a combustion chamber and an ignition electrode, the premixing pipe, the spiral gas mixing pipe and the combustion chamber are sequentially connected and fixed, the premixing pipe is communicated with the combustion chamber through the spiral gas mixing pipe, the ignition electrode is fixed to the outer surface of the combustion chamber, and a partition plate is fixed in the premixing pipe; the partition plate is used for dividing the interior of the premixing pipe into two cavities. A first valve plate and a second valve plate are coaxially and rotationally connected into the premixing pipe, and the first valve plate and the second valve plate are rotationally connected. By adjusting the opening and closing angles of the first valve plate and the second valve plate, the ventilation capacity of the two cavities in the premixing pipe into the spiral gas mixing pipe is controlled, and therefore the air-fuel ratio is controlled, and the effect of rapidly adjusting the air-fuel ratio is achieved.

Description

Technical Field

[0001] The invention relates to the field of burners, in particular to a porous medium burner with an adjustable air-fuel ratio and a rotating split structure. Background Art

[0002] Porous medium combustion is a combustion method in which porous medium is added to the burner; for example, the publication number: CN114087609A discloses a graded porous medium burner, which includes a combustion chamber and a plurality of combustion-supporting pipes. The combustion chamber has a gas distribution combustion cavity, and the combustion chamber is provided with a mixed gas inlet and a heat release port along its axial direction, which are respectively connected to the gas distribution combustion cavity, and the heat release port is used to output smoke and heat to the outside of the combustion chamber. The gas distribution combustion cavity is provided with gas distribution components and porous medium combustion layers arranged in sequence along the gas flow direction, and the direction from the mixed gas inlet to the heat release port is taken as the positive direction;

[0003] This patent uses a mixture of gases for combustion, that is, combustion gas and air are mixed before combustion to ensure combustion efficiency. Different objects require different flame temperatures. The flame temperature can be quickly changed by controlling the ratio of combustion gas and air, that is, the air-fuel ratio. However, the current porous media burner's ratio of combustion gas and air is controlled by two valves, and the air-fuel ratio cannot be adjusted quickly. Summary of the invention

[0004] (I) Purpose of the invention

[0005] In view of this, the purpose of the present invention is to propose an adjustable air-fuel ratio porous medium burner with a rotating split structure, so as to realize rapid adjustment of the air-fuel ratio by utilizing the rotating split structure.

[0006] (II) Technical solution

[0007] In order to achieve the above technical objectives, the present invention provides an adjustable air-fuel ratio porous medium burner with a rotating split structure:

[0008] The invention relates to a combustion chamber comprising a premixing tube, a spiral mixing tube, a combustion chamber and an ignition electrode, wherein the premixing tube, the spiral mixing tube and the combustion chamber are connected and fixed in sequence, and the premixing tube is connected to the combustion chamber through the spiral mixing tube, the ignition electrode is fixed to the outer surface of the combustion chamber, a partition is fixed inside the premixing tube, and the partition is used to divide the premixing tube into two chambers; a first valve plate and a second valve plate are coaxially connected in rotation in the premixing tube, and the first valve plate and the second valve plate are rotatably connected, a first driven gear is fixed at the end of the first valve plate, a second driven gear is fixed at the end of the second valve plate, and the sides of the first driven gear and the second driven gear are both meshed with double-row racks, the outer surface of the double-row racks is slidably connected with a first connecting frame, the outer surface of the double-row racks is fixed with a first electric push rod, and the output end of the first electric push rod is fixedly connected to the double-row racks.

[0009] Preferably, a first air inlet pipe and a second air inlet pipe are fixed to one end of the premixing pipe away from the spiral mixing pipe, and the first air inlet pipe and the second air inlet pipe are respectively connected to two chambers in the premixing pipe.

[0010] Preferably, a spiral sheet and a bracket are fixed inside the spiral mixing pipe, and a blade is rotatably connected to the middle part of the bracket.

[0011] Preferably, a driven bevel gear is fixed to one end of the blade away from the spiral sheet, a motor is fixed to the outer surface of the spiral mixing tube, a transmission shaft is fixed to the output end of the motor, the transmission shaft is rotationally connected to the spiral mixing tube, a transmission bevel gear is fixed to the end of the transmission shaft away from the motor, and the transmission bevel gear is meshed with the driven bevel gear.

[0012] Preferably, a thermal insulation brick is fixed inside the combustion chamber, and a first porous medium and a second porous medium are fixed inside the thermal insulation brick.

[0013] Preferably, a surface of the first porous medium facing the spiral mixing tube is arc-shaped.

[0014] Preferably, a first fixing frame is slidably connected to the outer surface of the first connecting frame, and the first fixing frame is fixed on the premixing tube.

[0015] Preferably, a flower shaft is inserted and fixed in the middle of the second valve plate, and the second valve plate is rotatably connected to the premixing pipe through the flower shaft.

[0016] Preferably, a connecting rod is fixed to the outer surface of the first connecting frame, a second electric push rod is fixed to the outer surface of the premixing tube, the output end of the second electric push rod is fixedly connected to the connecting rod, the second connecting frame is fixed to the end of the connecting rod away from the first connecting frame, the outer surface of the second connecting frame is slidably connected to the second fixing frame, and the second fixing frame is fixed on the premixing tube.

[0017] Preferably, the second connecting frame is equipped with a split rack, which includes a fixed rack, a movable rack and a synchronous gear. The fixed rack and the movable rack are both slidably connected to the second connecting frame. A third electric push rod is fixed to the outer surface of the second connecting frame, and the output end of the third electric push rod is fixedly connected to the movable rack. The synchronous gear is rotatably connected to the second connecting frame, and the synchronous gear is respectively meshed with the fixed rack and the movable rack.

[0018] It can be seen from the above technical solutions that this application has the following beneficial effects:

[0019] 1: By rotating the first valve plate and the second valve plate connected in the premixing tube, and the first driven gear and the second driven gear are respectively fixed at the ends of the first valve plate and the second valve plate, and the first driven gear and the second driven gear are pushed to rotate by the double-row rack, the opening and closing angles of the first valve plate and the second valve plate can be adjusted, thereby controlling the ventilation volume of the two chambers in the premixing tube into the spiral mixing tube, thereby controlling the air-fuel ratio, and achieving the effect of quickly adjusting the air-fuel ratio.

[0020] 2: By fixing a spiral vane in the spiral mixing pipe, the combustion gas and air entering the combustion chamber can spiral into the combustion chamber through the spiral vane, ensuring that the combustion gas and air are fully mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 The overall structural diagram of the porous medium burner with adjustable air-fuel ratio adopting a rotating split structure provided by the present invention;

[0023] Figure 2 A partial cross-sectional structural schematic diagram of an adjustable air-fuel ratio porous medium burner with a rotating split structure provided by the present invention;

[0024] Figure 3 A schematic diagram of the cross-sectional structure of a premixing tube of a porous medium burner with an adjustable air-fuel ratio and a rotating split structure provided by the present invention;

[0025] Figure 4 A schematic diagram of the spiral mixing tube structure of the air-fuel ratio adjustable porous medium burner with a rotating split structure provided by the present invention;

[0026] Figure 5 A schematic diagram of the disassembled structure of the combustion chamber of the porous medium burner with an adjustable air-fuel ratio adopting a rotating split structure provided by the present invention;

[0027] Figure 6 A schematic cross-sectional view of the structure of a porous medium burner with an adjustable air-fuel ratio and a rotating split structure provided by the present invention;

[0028] Figure 7 A schematic diagram of the overall structure of a second electric push rod and a split rack of the air-fuel ratio adjustable porous medium burner with a rotating split structure provided by the present invention;

[0029] Figure 8 A schematic diagram of the overall structure of the split racks of the air-fuel ratio adjustable porous medium burner with a rotating split structure provided by the present invention;

[0030] Fig. 9 A schematic diagram of the overall structure of the second valve plate and the flower shaft of the porous medium burner with an adjustable air-fuel ratio adopting a rotating split structure provided by the present invention.

[0031] Fig.10 A partial front view schematic diagram of a double-row rack and split racks of an adjustable air-fuel ratio porous medium burner with a rotating split structure provided by the present invention.

[0032] Description of the drawings: 1. premixing pipe; 11. partition; 12. first air inlet pipe; 13. second air inlet pipe; 14. first valve plate; 141. first driven gear; 15. second valve plate; 151. second driven gear; 152. flower shaft; 16. double-row rack; 161. first connecting frame; 162. first fixed frame; 17. first electric push rod; 18. split rack; 181. fixed rack; 182. movable rack; 183 , synchronous gear; 184, second connecting frame; 185, second fixing frame; 19, third electric push rod; 2, spiral mixing tube; 21, spiral sheet; 22, blade; 221, driven bevel gear; 23, bracket; 24, transmission shaft; 241, transmission bevel gear; 25, motor; 3, combustion chamber; 31, first porous medium; 32, second porous medium; 33, insulation brick; 4, ignition electrode; 5, second electric push rod; 6, connecting rod. DETAILED DESCRIPTION

[0033] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and use. It should be understood that in all of these figures, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present disclosure. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0034] Example 1

[0035] See also Figure 1 and Figure 2As shown, a porous medium burner with an adjustable air-fuel ratio adopts a rotating split structure, including a premixing tube 1, a spiral mixing tube 2, a combustion chamber 3 and an ignition electrode 4. The premixing tube 1, the spiral mixing tube 2 and the combustion chamber 3 are connected and fixed in sequence, and the premixing tube 1 is connected to the combustion chamber 3 through the spiral mixing tube 2, and the ignition electrode 4 is fixed to the outer surface of the combustion chamber 3; illustratively, the combustion gas and air enter the spiral mixing tube 2 through the premixing tube 1 and mix before entering the combustion chamber 3. The ignition electrode 4 is energized to generate an electric spark, which can ignite the combustion gas for combustion.

[0036] For further information, see Figure 2 and Figure 3 As shown, a partition 11 is fixed inside the premixing tube 1, and the partition 11 is used to divide the premixing tube 1 into two chambers. A first intake pipe 12 and a second intake pipe 13 are fixed to the end of the premixing tube 1 away from the spiral mixing tube 2, which are used to enter the supporting combustion gas and the fuel gas respectively. The supporting combustion gas is such as air. The first intake pipe 12 and the second intake pipe 13 are respectively connected to the two chambers in the premixing tube 1. A first valve plate 14 and a second valve plate 15 are coaxially connected to the premixing tube 1, and the first valve plate 14 and the second valve plate 15 are rotatably connected. By changing the opening and closing angles of the first valve plate 14 and the second valve plate 15, the intake amount entering the spiral mixing tube 2 from the premixing tube 1 can be controlled, thereby controlling the air-fuel ratio.

[0037] Specifically, a first driven gear 141 is fixed to the end of the first valve plate 14, and a second driven gear 151 is fixed to the end of the second valve plate 15. The sides of the first driven gear 141 and the second driven gear 151 are both meshed with a double-row rack 16, and the outer surface of the double-row rack 16 is slidably connected to the first connecting frame 161, and the outer surface of the double-row rack 16 is fixed with a first electric push rod 17, and the output end of the first electric push rod 17 is fixedly connected to the double-row rack 16; illustratively, the double-row rack 16 is driven to slide by the first electric push rod 17, so that the first valve plate 14 and the second valve plate 15 can be pushed to rotate in the same direction, so that the ventilation volume of the two chambers in the premixing tube 1 is increased by one and decreased by the other; the purpose is to facilitate the rapid adjustment of the ventilation volume of the two chambers in the premixing tube 1, thereby adjusting the air-fuel ratio entering the spiral mixing tube 2.

[0038] See also Figure 2 and Figure 4As shown, a spiral sheet 21 and a bracket 23 are fixed inside the spiral mixing tube 2, and a blade 22 is rotatably connected to the middle part of the bracket 23. A driven bevel gear 221 is fixed to the end of the blade 22 away from the spiral sheet 21, and a motor 25 is fixed to the outer surface of the spiral mixing tube 2. A transmission shaft 24 is fixed to the output end of the motor 25. The transmission shaft 24 is rotatably connected to the spiral mixing tube 2, and a transmission bevel gear 241 is fixed to the end of the transmission shaft 24 away from the motor 25, and the transmission bevel gear 241 is meshed with the driven bevel gear 221; illustratively, the transmission shaft 24 is driven to rotate by the motor 25, and the transmission shaft 24 can drive the driven bevel gear 221 to rotate through the transmission bevel gear 241, so that the driven bevel gear 221 drives the blade 22 to rotate; the purpose is to accelerate the flow of air in the spiral mixing tube 2, and the airflow enters the spiral sheet 21 for spiral mixing, thereby improving the mixing effect of air and combustion gas.

[0039] See also Figure 2 , Figure 5 and Figure 6 As shown, an insulation brick 33 is fixed inside the combustion chamber 3, and a first porous medium 31 and a second porous medium 32 are fixed inside the insulation brick 33. In this embodiment, the first porous medium 31 and the second porous medium 32 have a large specific surface area and a complex pore structure, which can promote the mixing of fuel and air in the pores. More uniform mixing of fuel and air can improve combustion efficiency and stability. The first porous medium 31 has an arc-shaped side facing the spiral mixing tube 2, which is beneficial to the diffusion of gas on the surface of the first porous medium 31.

[0040] Example 2

[0041] Based on the implementation of Example 1, refer to Figure 7 , Figure 8 and Fig. 9 As shown, the outer surface of the first connecting frame 161 is slidably connected to the first fixing frame 162 , and the first fixing frame 162 is fixed on the premixing tube 1 , so as to enable the first connecting frame 161 to slide.

[0042] See also Fig. 9 As shown, a flower shaft 152 is inserted and fixed in the middle of the second valve plate 15, and the second valve plate 15 is rotatably connected to the premixing tube 1 through the flower shaft 152; the purpose is that the flower shaft 152 can drive the second valve plate 15 to rotate and facilitate the installation of the second valve plate 15.

[0043] See also Figure 7 and Figure 8As shown, a connecting rod 6 is fixed to the outer surface of the first connecting frame 161, a second electric push rod 5 is fixed to the outer surface of the premixing tube 1, an output end of the second electric push rod 5 is fixedly connected to the connecting rod 6, a second connecting frame 184 is fixed to the end of the connecting rod 6 away from the first connecting frame 161, an outer surface of the second connecting frame 184 is slidably connected to a second fixing frame 185, and the second fixing frame 185 is fixed on the premixing tube 1; illustratively, the connecting rod 6 can be pushed by the operation of the second electric push rod 5, so that the connecting rod 6 drives the first connecting frame 161 and the second connecting frame 184 to slide on the first fixing frame 162 and the second fixing frame 185 respectively.

[0044] For details, see Figure 7 and Figure 8 As shown, the second connecting frame 184 is equipped with a split rack 18, which includes a fixed rack 181, a movable rack 182 and a synchronous gear 183. The fixed rack 181 and the movable rack 182 are both slidably connected to the second connecting frame 184. A third electric push rod 19 is fixed to the outer surface of the second connecting frame 184. The output end of the third electric push rod 19 is fixedly connected to the movable rack 182. The synchronous gear 183 is rotatably connected to the second connecting frame 184, and the synchronous gear 183 is respectively meshed with the fixed rack 181 and the movable rack 182;

[0045] In this embodiment, when the double-row rack 16 is meshed with the first driven gear 141 and the second driven gear 151, the split rack 18 is not meshed with the first driven gear 141 and the second driven gear 151, because the double-row rack 16 and the split rack 18 are misaligned up and down. Fig.10 As shown, on the contrary, when the split rack 18 is meshed with the first driven gear 141 and the second driven gear 151, the double-row rack 16 is not meshed with the first driven gear 141 and the second driven gear 151; the purpose is to avoid the split rack 18 and the double-row rack 16 from influencing each other, and when the split rack 18 is switched to mesh with the first driven gear 141 and the second driven gear 151, the movable rack 182 is driven by the third electric push rod 19 to drive the first driven gear 141 (or the second driven gear 151) to rotate clockwise When the movable rack 182 drives the fixed rack 181 to rotate in the opposite direction through the synchronous gear 183, the second driven gear 151 (or the first driven gear 141) can be driven to rotate counterclockwise, so that the first driven gear 141 or the second driven gear 151 can rotate synchronously, but in opposite directions, so as to control the first valve plate 14 and the second valve plate 15 to open, so that the two chambers in the premixing tube 1 can increase or decrease the air flow at the same time, providing a control method different from that of Example 1 to meet the adjustment needs of more different scenarios.

[0046] The exemplary implementation scheme of the present disclosure is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. A porous medium burner with an adjustable air-fuel ratio adopting a rotating split structure, comprising a premixing tube (1), a spiral mixing tube (2), a combustion chamber (3) and an ignition electrode (4), wherein the premixing tube (1), the spiral mixing tube (2) and the combustion chamber (3) are connected and fixed in sequence, and the premixing tube (1) is connected to the combustion chamber (3) through the spiral mixing tube (2), and the ignition electrode (4) is fixed to the outer surface of the combustion chamber (3), characterized in that: A partition (11) is fixed inside the premixing tube (1), and the partition (11) is used to divide the premixing tube (1) into two chambers; a first valve plate (14) and a second valve plate (15) are coaxially rotatably connected inside the premixing tube (1), and the first valve plate (14) and the second valve plate (15) are rotatably connected, a first driven gear (141) is fixed at the end of the first valve plate (14), and a second driven gear (151) is fixed at the end of the second valve plate (15), and the side surfaces of the first driven gear (141) and the second driven gear (151) are both meshed with double-row racks (16), and the outer surface of the double-row racks (16) is slidably connected with a first connecting frame (161), and the outer surface of the double-row racks (16) is fixed with a first electric push rod (17), and the output end of the first electric push rod (17) is fixedly connected to the double-row racks (16).

2. The air-fuel ratio adjustable porous medium burner with a rotating split structure according to claim 1 is characterized in that: A first air intake pipe (12) and a second air intake pipe (13) are fixed to one end of the premixing pipe (1) away from the spiral mixing pipe (2); the first air intake pipe (12) and the second air intake pipe (13) are respectively connected to two chambers in the premixing pipe (1).

3. The air-fuel ratio adjustable porous medium burner with a rotating split structure according to claim 1 is characterized in that: A spiral sheet (21) and a bracket (23) are fixed inside the spiral mixing pipe (2), and a blade (22) is rotatably connected to the middle part of the bracket (23).

4. The air-fuel ratio adjustable porous medium burner with a rotating split structure according to claim 3 is characterized in that: A driven bevel gear (221) is fixed to one end of the blade (22) away from the spiral blade (21); a motor (25) is fixed to the outer surface of the spiral mixing tube (2); a transmission shaft (24) is fixed to the output end of the motor (25); the transmission shaft (24) is rotationally connected to the spiral mixing tube (2); a transmission bevel gear (241) is fixed to the end of the transmission shaft (24) away from the motor (25); and the transmission bevel gear (241) is meshed with the driven bevel gear (221).

5. The air-fuel ratio adjustable porous medium burner with a rotating split structure according to claim 1 is characterized in that: A heat-insulating brick (33) is fixed inside the combustion chamber (3), and a first porous medium (31) and a second porous medium (32) are fixed inside the heat-insulating brick (33).

6. The air-fuel ratio adjustable porous medium burner with a rotating split structure according to claim 5 is characterized in that: The first porous medium (31) has a curved surface facing the spiral gas mixing tube (2).

7. The air-fuel ratio adjustable porous medium burner with a rotating split structure according to claim 1 is characterized in that: The outer surface of the first connecting frame (161) is slidably connected to a first fixing frame (162), and the first fixing frame (162) is fixed on the premixing tube (1).

8. The air-fuel ratio adjustable porous medium burner with a rotating split structure according to claim 1 is characterized in that: A flower shaft (152) is inserted and fixed in the middle of the second valve plate (15), and the second valve plate (15) is rotatably connected to the premixing pipe (1) via the flower shaft (152).

9. The air-fuel ratio adjustable porous medium burner with a rotating split structure according to claim 1, characterized in that: A connecting rod (6) is fixed to the outer surface of the first connecting frame (161), a second electric push rod (5) is fixed to the outer surface of the premixing tube (1), an output end of the second electric push rod (5) is fixedly connected to the connecting rod (6), a second connecting frame (184) is fixed to the end of the connecting rod (6) away from the first connecting frame (161), a second fixing frame (185) is slidably connected to the outer surface of the second connecting frame (184), and the second fixing frame (185) is fixed to the premixing tube (1).

10. The air-fuel ratio adjustable porous medium burner with a rotating split structure according to claim 9, characterized in that: The second connecting frame (184) is equipped with a split rack (18), and the split rack (18) includes a fixed rack (181), a movable rack (182) and a synchronous gear (183). The fixed rack (181) and the movable rack (182) are both slidably connected to the second connecting frame (184). A third electric push rod (19) is fixed on the outer surface of the second connecting frame (184), and the output end of the third electric push rod (19) is fixedly connected to the movable rack (182). The synchronous gear (183) is rotatably connected to the second connecting frame (184), and the synchronous gear (183) is respectively meshed with the fixed rack (181) and the movable rack (182).

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