Burner with high injection performance

Abstract

The utility model discloses a combustor with high injection performance. The combustor comprises a furnace end, a furnace sealing cover and an injection pipe assembly. An outer ring connector and an outer ring notch are formed in the front side and the rear side of the outer ring second gas mixing cavity respectively; the outer ring interface is connected with the outer ring injection pipe; the furnace sealing cover detachably covers the outer ring notch; the outer ring second gas mixing cavity is provided with an expansion extension section; and the expansion extension section is a trumpet-shaped pipe section which is gradually expanded from the outer ring interface to the section of the outer ring notch, and is in continuous transition with the expansion section of the outer ring injection pipe. According to the utility model, the expansion and extension section is integrated in the second gas mixing cavity of the outer ring, so that the length limitation of a traditional split type injection pipe is broken through, the effective action range of the expansion section is maximized in a limited space, and meanwhile, the compactness of the overall structure of the combustor is kept. The design of the detachable furnace sealing cover at the notch of the outer ring not only meets the demolding requirement of the core-pulling mold in the casting process, but also facilitates later cleaning and maintenance, and reduces the blocking risk.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a burner with high ejection performance. Background Technology

[0002] As the core functional component of a gas stove, the burner's performance directly affects the mixing efficiency of gas and air, as well as combustion stability. Traditional burners typically employ a split design, consisting of a burner assembly with an integrated mixing chamber and an independent injector tube with a Venturi structure. The injector tube's Venturi structure comprises three flow channels: a contracting section with a gradually narrowing cross-section, a throat section with a constant cross-section, and an expanding section with a gradually widening cross-section. This achieves air intake and gas mixing through hydrodynamic effects. In the casting process, to form the complex internal structure of the injector tube, a core-pulling mold with a draft angle is required for demolding, which imposes process constraints on the injector tube's structural design. Current technologies generally employ a separate, detachable connection between the injector tube and burner head. While this solves the demolding problem, it results in the overall length of the injector tube being segmented and compressed due to limitations in the overall burner size. In particular, the expansion section is forced to shorten, failing to create sufficient airflow diffusion space. This structural defect significantly reduces the Venturi effect, causing uneven gas-air mixing, insufficient primary air injection, and ultimately affecting combustion efficiency and flame stability. Therefore, further improvements are needed. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a burner with high ejection performance.

[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a burner with high ejector performance, including: a furnace head, a furnace cover and an ejector tube assembly;

[0005] The burner head includes a central gas supply seat, a central mixing chamber, an outer ring gas supply seat, an outer ring first mixing chamber, and an outer ring second mixing chamber; the ejector assembly includes a central ejector and an outer ring ejector; the central gas supply seat, the central mixing chamber, and the central ejector are connected in sequence; the outer ring gas supply seat, the outer ring first mixing chamber, the outer ring second mixing chamber, and the outer ring ejector are connected in sequence; the outer ring ejector is configured with a Venturi structure, including a contraction section, a throat section, and an expansion section;

[0006] The outer ring second mixing chamber is provided with an outer ring interface and an outer ring notch on its front and rear sides, respectively; the outer ring interface is connected to the outer ring ejector tube; the furnace cover is detachably installed on the outer ring notch; the outer ring second mixing chamber is provided with an expansion extension section; the expansion extension section is a trumpet-shaped tube section whose cross-section gradually expands from the outer ring interface toward the outer ring notch, and is continuously transitioned to the expansion section of the outer ring ejector tube.

[0007] Optionally, the outer ring second mixing chamber further includes a transition mixing chamber, which is connected between the expansion extension section and the first mixing chamber.

[0008] Optionally, the transition mixing chamber is a cylindrical chamber with a cross-section larger than that of the expansion extension section.

[0009] Optionally, the burner head is provided with at least two positioning holes on the outer edge of the outer ring notch; the furnace cover is provided with positioning ears that are adapted to the positioning holes.

[0010] Optionally, the burner head is provided with an annular recess at the air inlet end of the central mixing chamber and the outer ring second mixing chamber; the central ejector tube and the outer ring ejector tube can be inserted into the annular recess.

[0011] Optionally, the air inlet end of the ejector assembly is fitted with a damper plate.

[0012] Optionally, the ejector assembly is provided with a damper positioning post and a damper mounting hole.

[0013] The beneficial effects of this invention are as follows: The connection between the expansion extension section and the expansion section of the outer ring ejector tube significantly extends the total length of the expansion section, enhances the airflow diffusion efficiency, thereby increasing the primary air injection volume of the Venturi effect, significantly improving the ejection performance of the outer ring ejector tube, and promoting thorough premixing of gas and air. By integrating the expansion extension section into the second mixing chamber of the outer ring, the length limitation of traditional split ejector tubes is overcome, maximizing the effective range of the expansion section within a limited space while maintaining the compactness of the overall burner structure. The detachable furnace cover design at the notch in the outer ring notch not only meets the demolding requirements of the core-pulling mold in the casting process but also facilitates subsequent cleaning and maintenance, reducing the risk of blockage.

[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the burner structure of this utility model;

[0017] Figure 2 for Figure 1 Exploded view of the burner;

[0018] Figure 3 for Figure 1 Another exploded view of the burner;

[0019] Figure 4 for Figure 1 Cross-sectional view of the burner.

[0020] Explanation of key component symbols:

[0021] 10. Burner head; 11. Central gas supply seat; 12. Central mixing chamber; 13. Outer ring gas supply seat; 14. Outer ring first mixing chamber; 15. Outer ring second mixing chamber; 151. Outer ring interface; 152. Outer ring notch; 153. Expansion extension section; 154. Transition mixing chamber; 16. Positioning hole; 17. Annular recessed platform; 20. Furnace cover; 21. Positioning ear; 30. Injector tube assembly; 31. Central injector tube; 32. Outer ring injector tube; 33. Contraction section; 34. Throat section; 35. Expansion section; 36. Damper positioning post; 37. Damper mounting hole; 40. Damper plate. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Example

[0027] Reference Figures 1 to 4 The present invention proposes a burner with high ejector performance, comprising: a burner head 10, a furnace cover 20, and an ejector tube assembly 30;

[0028] The burner head 10 includes a central gas supply seat 11, a central mixing chamber 12, an outer ring gas supply seat 13, an outer ring first mixing chamber 14, and an outer ring second mixing chamber 15; the ejector tube assembly 30 includes a central ejector tube 31 and an outer ring ejector tube 32; the central gas supply seat 11, the central mixing chamber 12, and the central ejector tube 31 are connected in sequence; the outer ring gas supply seat 13, the outer ring first mixing chamber 14, the outer ring second mixing chamber 15, and the outer ring ejector tube 32 are connected in sequence; the outer ring ejector tube 32 is arranged in a Venturi structure, including a contraction section 33, a throat section 34, and an expansion section 35.

[0029] The outer ring second mixing chamber 15 is provided with an outer ring interface 151 and an outer ring notch 152 on the front and rear sides respectively; the outer ring interface 151 is connected to the outer ring ejector tube 32; the furnace cover 20 is detachably located on the outer ring notch 152; the outer ring second mixing chamber 15 is provided with an expansion extension section 153; the expansion extension section 153 is a trumpet-shaped tube section whose cross-section gradually expands from the outer ring interface 151 toward the outer ring notch 152, and is continuously connected to the expansion section 35 of the outer ring ejector tube 32.

[0030] In this invention, the connection between the expansion extension section 153 and the expansion section 35 of the outer ring ejector tube 32 significantly extends the total length of the expansion section 35, enhances the airflow diffusion efficiency, thereby increasing the primary air injection volume of the Venturi effect, significantly improving the ejection performance of the outer ring ejector tube 32, and promoting thorough premixing of fuel gas and air. By integrating the expansion extension section 153 into the outer ring second mixing chamber 15, the length limitation of traditional split ejector tubes is overcome, maximizing the effective range of the expansion section 35 within a limited space, while maintaining the compactness of the overall burner structure. The removable furnace cover 20 at the notch 152 of the outer ring notch not only meets the demolding requirements of the core-pulling mold in the casting process, but also facilitates later cleaning and maintenance, reducing the risk of blockage.

[0031] In this embodiment, the outer ring second mixing chamber 15 further includes a transition mixing chamber 154, which is connected between the expansion extension section 153 and the first mixing chamber. The transition mixing chamber 154 serves as a buffer structure between the expansion extension section 153 and the outer ring first mixing chamber 14. It provides additional mixing space for the combustion gas and air, allowing insufficiently mixed airflow to be further homogenized through turbulent disturbance. This compensates for any potential mixing dead zones that may exist in the single flow channel of the ejector, ensuring that the gas entering the combustion stage achieves the optimal mixing ratio.

[0032] Specifically, the transition mixing chamber 154 is a cylindrical cavity with a cross-section larger than that of the expansion extension section 153. The uniform wall thickness design of the cylindrical cavity is easier to achieve in the casting process and can withstand the pressure fluctuations inside the mixing chamber, avoiding cavity deformation or cracking caused by structural stress concentration.

[0033] In this embodiment, the furnace head 10 has at least two positioning holes 16 on the outer edge of the outer ring notch 152; the furnace cover 20 has positioning ears 21 that are adapted to the positioning holes 16. The precise fit between the positioning holes 16 and the positioning ears 21 ensures the alignment and installation of the furnace cover 20 with the outer ring notch 152, avoiding problems such as poor sealing or air leakage caused by misalignment, while simplifying the assembly process and improving production efficiency.

[0034] In this embodiment, the burner head 10 is provided with an annular recess 17 at the air inlet end of the central mixing chamber 12 and the outer ring second mixing chamber 15; the central ejector tube 31 and the outer ring ejector tube 32 can be inserted into the annular recess 17. The tight fit between the annular recess 17 and the ejector tube insertion end forms a mechanical seal interface, reducing the risk of gas leakage from the connection point, which is especially suitable for the reliability requirements of high-pressure gas supply systems.

[0035] In this embodiment, the air inlet end of the ejector assembly 30 is fitted with a damper plate 40.

[0036] Specifically, the ejector assembly 30 is provided with a damper positioning post 36 and a damper mounting hole 37. The mating design of the damper positioning post 36 and the mounting hole can fix the position of the damper plate 40, prevent the damper from shifting due to airflow impact or vibration, and facilitate quick positioning and installation of the damper plate 40.

[0037] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A combustor having high entrainment performance, characterized by The utility model relates to a kind of gas supply device, including: Furnace head (10), furnace cover (20) and ejector pipe assembly (30); The furnace head (10) includes center gas supply seat (11), center mixing chamber (12), outer ring gas supply seat (13), outer ring first mixing chamber (14) and outer ring second mixing chamber (15);The ejector pipe assembly (30) includes center ejector pipe (31) and outer ring ejector pipe (32);The center gas supply seat (11), center mixing chamber (12) and center ejector pipe (31) are sequentially communicated;The outer ring gas supply seat (13), outer ring first mixing chamber (14) and outer ring second mixing chamber (15) and outer ring ejector pipe (32) are sequentially communicated;The outer ring ejector pipe (32) is arranged in a venturi structure, including converging section (33), throat section (34) and expansion section (35); The front and back sides of the outer ring second mixing chamber (15) are respectively provided with outer ring interface (151) and outer ring missing slot (152);The outer ring interface (151) is connected with the outer ring ejector pipe (32);The furnace cover (20) is detachably covered in the outer ring missing slot (152);The outer ring second mixing chamber (15) is provided with expansion extension section (153);The expansion extension section (153) is a horn-shaped pipe section gradually expanding from the outer ring interface (151) to the outer ring missing slot (152), and is coherently transitioned with the expansion section (35) of the outer ring ejector pipe (32).

2. The combustor with high entrainment performance according to claim 1, characterized in that: The outer ring second mixing chamber (15) further includes transition mixing chamber (154), and the transition mixing chamber (154) is connected between the expansion extension section (153) and the first mixing chamber.

3. The combustor with high entrainment performance according to claim 2, characterized in that: The transition mixing chamber (154) is a cylindrical chamber with a larger cross section than the expansion extension section (153).

4. The combustor with high entrainment performance according to claim 1, characterized by: The furnace head (10) is provided with at least two positioning holes (16) on the outer edge of the outer ring missing slot (152);The furnace cover (20) is provided with positioning lug (21) matched with the positioning hole (16).

5. The combustor with high entrainment performance according to claim 1, characterized by: The furnace head (10) is provided with annular sunken platform (17) at the gas inlet end of the center mixing chamber (12) and outer ring second mixing chamber (15);The center ejector pipe (31) and outer ring ejector pipe (32) can be inserted into the annular sunken platform (17).

6. The combustor with high entrainment performance of claim 1, wherein: The air door plate (40) is embedded at the gas inlet end of the ejector pipe assembly (30).

7. The combustor with high entrainment performance according to claim 6, characterized in that: The ejector pipe assembly (30) is provided with air door positioning column (36) and air door mounting hole (37).

Images