Gas mixing structure of a burner

Abstract

The utility model relates to a gas combustor technical field, concretely relates to a kind of gas mixing structure of combustor, including the guide plate for guiding gas to flow upwards, cover plate is provided above guide plate, cover plate cover is formed annular gas mixing chamber in guide plate rear, shunt plate is provided in gas mixing chamber, shunt plate separates into upper chamber and lower chamber, the utility model is by improving the structure of gas mixing chamber, after gas enters from outside, form stable uniform cyclone, after entering gas mixing chamber, be guided to cover plate, can form uniform stable combustion, effectively avoid deflagration and explosion phenomenon in ignition combustion process, help to improve the efficiency of combustion, guarantee the safe and reliable combustion.

Description

Technical Field

[0001] This utility model relates to the field of gas burner technology, and specifically to a gas mixing structure for a burner. Background Technology

[0002] Gas burners, as key equipment for mixing gas and air and igniting them, are widely used in industrial and civil fields, such as gas stoves, boilers, heating furnaces, and wall-hung boilers. Currently, the structure of gas burners on the market mainly includes the burner body, fuel nozzle, gas passage, mixing device, ignition device, and combustion chamber.

[0003] Existing burners exhibit several problems that urgently need to be addressed during operation. Firstly, they suffer from poor airflow stability. The shape, size, and relative position of the burner's fuel nozzles and gas passages are not designed optimally, making the mixing of fuel gas and air before entering the combustion chamber susceptible to external disturbances (such as furnace pressure fluctuations and surrounding airflow disturbances), resulting in unstable airflow. This unstable airflow causes the flame to wobble, fork, or even extinguish during combustion, reducing combustion efficiency and potentially leading to incomplete combustion and increased emissions of pollutants such as carbon monoxide and nitrogen oxides.

[0004] It is evident that existing burners still have room for improvement and should be optimized to improve the mixing structure, thereby enhancing the mixing effect. This could involve incorporating swirling gas channels or specially shaped mixing chambers to improve the uniformity of gas-air mixing, reduce the impact of external interference on airflow stability, and ensure good flow characteristics and concentration uniformity of the mixture upon entering the combustion chamber. This results in a more stable airflow and more uniform gas-air mixing, ultimately guaranteeing the stability and reliability of the burner. Therefore, a more reasonable technical solution is needed to address the technical problems existing in the current technology. Utility Model Content

[0005] To overcome at least one of the defects mentioned above, this utility model proposes a gas mixing structure for a burner, which aims to improve the gas mixing structure of the burner so that the mixed gas enters the burner in a swirling direction. The gas mixing chamber inside the burner forms two chambers, an upper chamber and a lower chamber. Under the action of the flow divider, backflow can be avoided, thereby ensuring stable combustion and avoiding deflagration and detonation.

[0006] To achieve the above objectives, the gas mixing structure disclosed in this utility model can adopt the following technical solution:

[0007] A gas mixing structure for a burner includes a guide plate for guiding gas to flow upward, a cover plate is provided above the guide plate, the cover plate covers the guide plate to form an annular gas mixing chamber, and a flow divider is provided in the gas mixing chamber to divide the gas mixing chamber into an upper chamber and a lower chamber.

[0008] The aforementioned burner guides the gas to maintain a uniform flow and enter the mixing chamber of the cover plate. The airflow in the mixing chamber is separated by a flow divider and flows from the lower chamber into the upper chamber, and then flows out of the upper chamber for combustion, thereby achieving uniform and stable combustion. This avoids deflagration during ignition and combustion, and explosions during flameout.

[0009] Furthermore, for the gas to achieve stable combustion after flowing out of the cover plate body, the cover plate structure needs optimization. One feasible option is proposed here: the cover plate includes a cover plate body with an outwardly inclined annular surface. A plurality of combustion holes are evenly arranged on the annular surface. These combustion holes include high-level holes and low-level holes, with equal widths and a longer length than the low-level holes. When using this scheme, the high-level and low-level holes can be evenly or non-evenly intersected.

[0010] Furthermore, the cover plate can be constructed in various forms, and its structure is not limited to a single one. Here, we optimize and propose one feasible option: the cover plate has an upwardly protruding mixing ring at its center, and the flow divider is disposed within the inner cavity of the upwardly protruding mixing ring. When adopting the above scheme, the outer edge of the cover plate is also provided on the outer side of the upwardly protruding mixing ring.

[0011] Furthermore, the structure of the upper protruding mixing ring can be optimized. One feasible option is proposed here: the top of the upper protruding mixing ring also forms an inwardly inclined annular surface, which connects with the outwardly inclined annular surface to guide the gas to the combustion hole. When the above scheme is adopted, after the gas enters the upper cavity, it can flow along the inwardly inclined annular surface to the combustion hole and be output from the combustion hole.

[0012] Furthermore, the manifold is used to divide the mixing chamber, and its structure can be constructed in various forms. Here, we optimize and propose one feasible option: the manifold includes an intermediate cylinder, with an annular panel at the upper end of the intermediate cylinder. Several air holes are evenly distributed along the circumference of the annular panel, and these air holes extend obliquely from the lower surface of the annular panel to its upper surface. With this design, the manifold divides the burner's mixing chamber into an upper and lower chamber. Gas from the lower chamber enters the upper chamber after passing through the manifold, maintaining gas flow stability during ignition, ensuring a stable and reliable ignition process, and preventing deflagration. It also prevents gas backflow, avoiding popping sounds during flameout. Therefore, the manifold effectively improves the combustion stability and reliability of the burner.

[0013] Furthermore, the specific structure of the vent can be polygonal, curved, or irregular; its structure is not uniquely limited. Here, we propose one feasible option: the vent includes a horizontal upper port on the upper surface of the annular panel, a guide structure extending from the upper port to the lower surface of the annular surface, and a vertical port at the end of the guide structure. When using this scheme, the gas in the lower cavity flows through the guide structure, moving from below the annular panel to above it, forming an inclined airflow that is distributed circumferentially, thus creating a stable vortex above the annular panel.

[0014] Furthermore, the horizontal upper port of the vent can be constructed in various forms, and its structure is not uniquely limited. Here, we optimize and propose one feasible option: the horizontal upper port includes a long side and a short side, with the long side extending to the short side via an arc-shaped edge. When adopting this scheme, the arc-shaped edge restricts the guiding space within the guiding structure. The airflow from the lower cavity to the upper cavity is more likely to maintain its stream shape under the restriction of the arc-shaped edge, avoiding the formation of scattered turbulence.

[0015] Furthermore, the guiding structure can adopt various schemes to form the guiding space, and its structure is not limited to a single one. Here, we optimize and propose one feasible option: the guiding structure includes a guiding ramp, with guiding side plates formed on both sides of the guiding ramp, and a guiding space formed between the guiding ramp and the guiding side plates. When adopting the above scheme, the guiding ramp and the guiding side plates can be integrally formed.

[0016] Furthermore, the guide plate, used to guide the airflow from the swirling convergence chamber to the mixing chamber, can be constructed in various forms. Here, we optimize and propose one feasible option: the guide plate includes an integrally formed central ring and an outer ring, the outer ring being concentrically arranged with the central ring. The central ring forms a central through-hole that mates with the guide plate, and several guide ports are provided at the edge of the central through-hole. When the gas mixture of fuel and air is delivered from the gas ejector pipe to below the guide plate, it rises from the guide ports to above the guide plate. With this design, the cooperation between the guide plate, the gas ejector pipe, and the flow divider plate orderly guides the mixed gas from the gas ejector pipe to the upper flow divider plate, which is located within the mixing chamber, thereby forming a stable airflow. This facilitates subsequent stable combustion, not only improving the quality of combustion but also helping to eliminate detonation and knocking sounds.

[0017] Furthermore, the central through-hole is used to cooperate with the gas ejector pipe and the flow divider plate. Its structure is not uniquely limited. Here, we optimize and propose one feasible option: the central through-hole includes a circular hole, and the flow guide includes an arc-shaped opening extending outward from the edge of the circular hole. When adopting the above scheme, the number of flow guides in the central through-hole is not limited. When multiple flow guides are provided, the flow guides are evenly spaced along the edge of the circular hole.

[0018] Furthermore, after the central through-hole is set, structural optimization can be performed to help the guide plate better cooperate with the gas ejector pipe. The structure is not limited to a single design; one feasible option is proposed here: the central through-hole and the guide port are connected to form an integral through-hole. A hole edge perpendicular to the hole opening is formed inside the through-hole, and the shape of the hole edge is consistent with the shape of the hole opening. With the above solution, the hole edge and the central ring are integrally formed, and the thickness of the hole edge is equal to the thickness of the central ring.

[0019] Compared with the prior art, some of the beneficial effects of the technical solution disclosed in this utility model include:

[0020] This invention improves the structure of the mixing chamber of the burner, so that the gas enters from the outside and forms a stable and uniform swirling flow. After entering the mixing chamber, the gas is guided to the cover plate, which can form a uniform and stable combustion. This effectively avoids deflagration and knocking during the ignition and combustion process, helps to improve combustion efficiency, and ensures safe and reliable combustion. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the gas-mixing structure.

[0023] Figure 2 This is a schematic diagram of the overall structure of the gas-mixed structure from another perspective.

[0024] Figure 3 This is a schematic diagram of the gas-mixed structure viewed from below.

[0025] Figure 4 This is a front view schematic diagram of the gas mixture structure.

[0026] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of AA.

[0027] Figure 6 This is a schematic diagram of the overall structure of the manifold.

[0028] Figure 7 This is a front view of the manifold.

[0029] Figure 8 This is a cross-sectional schematic diagram of the manifold.

[0030] Figure 9 This is a schematic diagram of the overall structure of the pilot version.

[0031] Figure 10 This is a bottom-view diagram of the guide panel.

[0032] In the above attached figures, the meanings of each label are as follows:

[0033] 1. Cover plate; 101. High-position hole; 102. Low-position hole; 103. Upper cavity; 104. Lower cavity; 2. Upper protruding mixing ring; 3. Inwardly inclined annular surface; 4. Guide plate; 401. Central ring; 402. Outer ring; 403. Central through hole; 404. Flow guide; 405. Hole edge; 5. Diverter plate; 501. Intermediate cylinder; 502. Annular panel; 503. Air hole; 5031. Horizontal upper port; 5032. Guide structure; 5032a. Guide inclined plate; 5032b. Guide side plate; 5033. Vertical longitudinal port. Detailed Implementation

[0034] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates this embodiment.

[0035] In view of the many shortcomings of the burners in the prior art, the following embodiments are optimized and overcome the defects of the prior art.

[0036] Example

[0037] like Figures 1-10 As shown, this embodiment provides a gas mixing structure for a burner, including a guide plate 4 for guiding the gas to flow upward. A cover plate 1 is provided above the guide plate 4. After the cover plate 1 covers the guide plate 4, an annular gas mixing chamber is formed. A flow divider 5 is provided inside the gas mixing chamber, which divides the gas mixing chamber into an upper chamber 103 and a lower chamber 104.

[0038] The burner disclosed in this embodiment guides the gas through the swirling convergence chamber 3, so that the gas enters the swirling convergence chamber 3 from the ejector channel 2 and forms a swirling flow, maintaining a uniform flow and entering the mixing chamber of the cover plate 1. The airflow in the mixing chamber is separated by the flow divider 5 and flows from the lower chamber 104 into the upper chamber 103, and then flows out from the upper chamber 103 for combustion, thereby achieving uniform and stable combustion, which can avoid deflagration during ignition and combustion and explosion during flameout.

[0039] After the gas flows out from the cover plate body, it forms stable combustion, requiring optimization of the cover plate 1 structure. This embodiment adopts one feasible option: the cover plate 1 includes a cover plate body with an outwardly inclined annular surface. A plurality of combustion holes are uniformly arranged on the annular surface. The combustion holes include high-level holes 101 and low-level holes 102. The widths of the high-level holes 101 and low-level holes 102 are equal, and the length of the high-level hole 101 is greater than the length of the low-level hole 102. When adopting the above scheme, the high-level holes 101 and low-level holes can be uniformly or non-uniformly intersected.

[0040] The cover plate can be constructed in various forms, and its structure is not limited to a single one. This embodiment optimizes and adopts one feasible option: the center of the cover plate is provided with an upwardly protruding mixing ring 2, and the flow divider 5 is disposed in the inner cavity of the upwardly protruding mixing ring 2. When the above scheme is adopted, the outer edge of the cover plate 1 is also provided on the outer side of the upwardly protruding mixing ring 2.

[0041] The structure of the upper protruding mixing ring can be further optimized. This embodiment employs one feasible option: the top of the upper protruding mixing ring 2 also forms an inwardly inclined annular surface 3, which connects to an outwardly inclined annular surface to guide the gas to the combustion hole. With this design, after entering the upper chamber, the gas flows along the inwardly inclined annular surface 3 to the combustion hole and is output from the combustion hole.

[0042] The flow divider 5 is used to separate the mixing chamber. Its structure can be configured in various forms; this embodiment optimizes and adopts one feasible option: the flow divider 5 includes an intermediate cylinder 501, with an annular panel 502 at its upper end. A plurality of air holes 503 are evenly distributed along the circumference of the annular panel 502, extending obliquely from the lower surface to the upper surface of the annular panel 502. With this design, the flow divider 5 separates the burner's mixing chamber into an upper chamber 103 and a lower chamber 104. Gas from the lower chamber 104 enters the upper chamber 103 after passing through the flow divider 5, maintaining gas flow stability during ignition, ensuring stable and reliable ignition, and preventing deflagration. It also prevents gas backflow, avoiding popping sounds during flameout. Therefore, the flow divider 5 effectively improves the combustion stability and reliability of the burner.

[0043] The specific structure of the vent 503 can be polygonal, curved, or irregular; its structure is not uniquely limited. This embodiment optimizes and adopts one feasible option: the vent 503 includes a horizontal upper port 5031 disposed on the upper surface of the annular panel 502, a guide structure 5032 forming from the upper port to the lower surface of the annular surface, and a vertical port 5033 forming at the end of the guide structure 5032. When the above scheme is adopted, the gas in the lower cavity 104 flows through the guide structure 5032, flowing from below the annular panel 502 to above the annular panel 502, forming an inclined airflow that is distributed along the circumference, thereby forming a stable vortex above the annular panel 502.

[0044] The horizontal upper port 5031 of the vent 503 can be constructed in various forms, and its structure is not limited to a single one. This embodiment optimizes and adopts one feasible option: the horizontal upper port 5031 includes a long side and a short side, with the long side extending to the short side via an arc-shaped edge. When the above scheme is adopted, the arc-shaped edge restricts the guiding space inside the guiding structure 5032. The airflow from the lower cavity 104 to the upper cavity 103 is more likely to maintain its stream shape under the restriction of the arc-shaped edge, avoiding the formation of scattered turbulence.

[0045] Furthermore, the guiding structure can adopt various schemes to form the guiding space, and its structure is not limited to one. Here, we optimize and propose one feasible option: the guiding structure 5032 includes a guiding inclined plate 5032a, guiding side plates 5032b are formed on both sides of the guiding inclined plate 5032a, and a guiding space is formed between the guiding inclined plate 5032a and the guiding side plates 5032b. When adopting the above scheme, the guiding inclined plate 5032a and the guiding side plates 5032b can be integrally formed.

[0046] The guide plate 4 is used to guide the airflow from the swirling convergence chamber 3 to the mixing chamber. Its structure can be configured in various forms; this embodiment optimizes and adopts one feasible option: the guide plate 4 includes an integrally formed central ring 401 and an outer ring 402. The outer ring 402 is concentrically arranged with the central ring 401. The central ring 401 forms a central through-hole 403 that cooperates with the guide plate. Several guide ports 404 are provided at the edge of the central through-hole 403. When the gas mixture is delivered from the gas ejector pipe to below the guide plate 4, it rises from the guide ports 404 to above the guide plate 4. With this design, the guide plate 4, in conjunction with the gas ejector pipe and the diverter plate 5, orderly guides the mixed gas from the gas ejector pipe to the upper diverter plate 5. The diverter plate 5 is located within the mixing chamber, thereby forming a stable airflow, facilitating subsequent stable combustion. This not only improves the quality of combustion but also helps eliminate deflagration and knocking.

[0047] The central through-hole 403 is used to cooperate with the gas ejector pipe and the flow divider 5. Its structure is not limited to a single type. This embodiment optimizes and adopts one feasible option: the central through-hole 403 includes a circular hole, and the flow guide 404 includes an arc-shaped opening extending outward from the edge of the circular hole. When adopting the above scheme, the number of flow guides 404 in the central through-hole 403 is not limited. When multiple flow guides 404 are provided, the flow guides 404 are evenly spaced along the edge of the circular hole.

[0048] Furthermore, after the central through-hole is set, structural optimization can be performed to help the guide plate better cooperate with the gas ejection pipeline. The structure is not limited to a single design; one feasible option is proposed here: the central through-hole 403 and the guide port 404 are connected and cooperate to form an integral through-hole. A perforation 405 perpendicular to the orifice is formed inside the orifice, and the shape of the perforation 405 is consistent with that of the orifice. When the above scheme is adopted, the perforation 405 is integrally formed with the central ring, and the thickness of the perforation 405 is equal to the thickness of the central ring.

[0049] The above are the embodiments listed in this example. However, this example is not limited to the optional embodiments described above. Those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments. Anyone can derive other various forms of embodiments under the guidance of this example. The above specific embodiments should not be construed as limiting the scope of protection of this example. The scope of protection of this example should be defined in the claims.

Claims

1. A mixing structure for a burner, characterized in that: It includes a guide plate (4) for guiding the gas to flow upward. A cover plate (1) is provided above the guide plate (4). The cover plate (1) covers the guide plate (4) to form an annular mixing chamber. A flow divider (5) is provided in the mixing chamber. The flow divider (5) divides the mixing chamber into an upper chamber (103) and a lower chamber (104).

2. The mixing structure of the burner according to claim 1, characterized in that: The cover plate (1) includes a cover plate (1) body, and an outwardly inclined annular surface is formed on the cover plate (1) body. A plurality of combustion holes are uniformly arranged on the annular surface. The combustion holes include a high-position hole (101) and a low-position hole (102). The widths of the high-position hole (101) and the low-position hole (102) are equal, and the length of the high-position hole (101) is greater than the length of the low-position hole (102).

3. The mixing structure of the burner according to claim 1, characterized in that: The cover plate has an upward-protruding mixing ring (2) at its center, and the flow divider (5) is located in the inner cavity of the upward-protruding mixing ring (2).

4. The mixing structure of the burner according to claim 3, characterized in that: The top of the upper protruding mixing ring (2) also forms an inwardly inclined annular surface (3), which is connected to the outwardly inclined annular surface to guide the gas to the combustion hole.

5. The mixing structure of the burner according to claim 1, characterized in that: The diverter plate (5) includes an intermediate cylinder (501), and an annular panel (502) is provided at the upper end of the intermediate cylinder (501). A number of air holes (503) are evenly distributed along the circumference on the annular panel (502). The air holes (503) extend obliquely from the lower surface of the annular panel (502) to the upper surface of the annular panel (502).

6. The mixing structure of the burner according to claim 5, characterized in that: The vent (503) includes a horizontal upper port (5031) disposed on the upper surface of the annular panel (502), a guide structure (5032) forming from the upper port to the lower surface of the annular surface, and a vertical port (5033) forming at the end of the guide structure (5032).

7. The mixing structure of the burner according to claim 6, characterized in that: The guide structure (5032) includes a guide ramp (5032a), guide side plates (5032b) are formed on both sides of the guide ramp, and a guide space is formed between the guide ramp (5032a) and the guide side plates (5032b).

8. The mixing structure of the burner according to claim 1, characterized in that: The guide plate (4) includes an integrally formed central ring (401) and an outer ring (402). The outer ring (402) is concentrically arranged with the central ring (401). The central ring (401) forms a central through hole (403) that cooperates with the guide plate. Several guide ports (404) are provided on the edge of the central through hole (403). When the gas mixture of gas and air is delivered to the bottom of the guide plate (4), it rises from the guide port (404) to the top of the guide plate (4).

9. The mixing structure of the burner according to claim 8, characterized in that: The central through hole (403) includes a circular hole, and the flow guide (404) includes an arc-shaped opening extending outward from the edge of the circular hole.

10. The mixing structure of the burner according to claim 8, characterized in that: The central through hole (403) and the guide port (404) are connected and cooperate to form an integral through hole. A hole edge (405) perpendicular to the hole opening is formed inside the hole opening, and the hole edge (405) is consistent with the shape of the hole opening.

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