Combustor with multi-stage injection air inlet adjusting structure

Abstract

The utility model discloses a burner with a multi-stage injection air inlet adjusting structure, which is characterized in that an adjusting screw rod is arranged at one end, facing an outer ring injection pipe, of an outer ring injection seat, and an outer ring adjusting ring is mounted on the adjusting screw rod in a threaded manner; the outer ring adjusting ring and the air inlet end of the outer ring injection pipe are spaced to form a secondary injection interval groove. And the outer ring adjusting ring moves on the adjusting screw rod, so that the distance between the secondary injection grooves can be changed. According to the utility model, the adjustable secondary injection space groove formed by the outer ring adjusting ring and the adjusting screw rod can accurately control the secondary air supply amount, and is matched with the primary injection of the trumpet-shaped air inlet end to form a two-stage injection synergistic effect. And by adjusting the space between the grooves, the air injection intensity can be dynamically matched according to the actual gas flow of the outer ring gas supply cavity, and the limitation of a traditional single-air-door structure in outer ring injection adjustment is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a burner with a multi-stage ejector intake adjustment structure. Background Technology

[0002] As the core functional component of gas stoves, the burner's combustion performance directly affects key parameters such as thermal efficiency, emission standards, and flame adjustment range. Traditional burners typically employ a dual-supply structure with a central injector and an outer ring injector. The outer ring supply chamber bears over 80% of the heat load and needs to adapt to the varying gas-air mixing requirements arising from different burner cap structures (such as multi-ring flames and direct injection flames) and gas distribution plate shapes (swirling and straight-through types). Existing technology uses a single damper adjustment mechanism at the injector inlet, employing an adjustable damper plate to linearly control the damper orifice opening. While this achieves basic air-fuel ratio adjustment, it has significant limitations: the gas flow range in the outer ring supply chamber is large, and a single damper orifice cannot meet the optimal injector ratio requirements under wide operating conditions. 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 a multi-stage ejector intake regulation structure.

[0004] The technical solution adopted by one embodiment of the present invention to solve its technical problem is: a burner with a multi-stage ejector air intake adjustment structure, including a burner head, a gas distribution plate, a burner cover and an ejector tube assembly, wherein the ejector tube assembly includes a central ejector tube, an outer ring ejector tube, an outer ring ejector seat and an outer ring adjustment ring.

[0005] The air inlet ends of the central ejector tube and the outer ring ejector tube are flared with gradually narrowing cross sections; the outer ring ejector seat is detachably installed at the air inlet end of the outer ring ejector tube; the air inlet end of the outer ring ejector seat is flared with gradually narrowing cross sections, and both the air inlet end of the outer ring ejector seat and the air inlet end of the central ejector tube are provided with damper plates.

[0006] An adjusting screw is provided at one end of the outer ring ejector seat facing the outer ring ejector tube, and the outer ring adjusting ring is threaded onto the adjusting screw; the outer ring adjusting ring and the air inlet end of the outer ring ejector tube form a secondary ejector slot; the outer ring adjusting ring can move on the adjusting screw to change the spacing of the secondary ejector slot.

[0007] Optionally, the air inlet end of the outer ring ejector seat and the air inlet end of the central ejector tube are flush.

[0008] Optionally, the outer ring ejector tube has two connecting walls on its lateral sides; the outer ring ejector seat has two connecting ears on its sides; the connecting ears are detachably installed on the connecting walls.

[0009] Optionally, the connecting wall is provided with a threaded hole and a positioning groove; the connecting ear is provided with a connecting hole and a positioning protrusion; the connecting hole corresponds to the threaded hole, and the positioning protrusion can be engaged with the positioning groove.

[0010] Optionally, the connecting wall is provided with scale markings.

[0011] Optionally, the outer ring adjusting ring has toothed protrusions on its outer periphery.

[0012] The beneficial effects of this invention are as follows: The adjustable secondary ejector slot, composed of the outer ring adjusting ring and the adjusting screw, can precisely control the secondary air supply. Combined with the primary ejector at the horn-shaped air inlet, it forms a synergistic effect of two-stage ejection. By adjusting the slot spacing, the air ejection intensity can be dynamically matched according to the actual gas flow rate in the outer ring air supply chamber, effectively solving the limitations of traditional single-damper structures in outer ring ejector adjustment. The modular design of the detachable outer ring ejector seat and the separate adjusting ring allows for quick adaptation to differentiated combustion systems such as swirl distribution plates and multi-ring burners by replacing ejector seats or adjusting rings of different sizes, meeting stable combustion requirements while reducing development and maintenance costs.

[0013] 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

[0014] 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:

[0015] Figure 1 This is a schematic diagram of the burner structure of this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the burner.

[0017] Explanation of key component symbols:

[0018] 10. Burner head; 20. Gas distribution plate; 30. Burner cap; 40. Injector tube assembly; 41. Central injector tube; 42. Outer ring injector tube; 421. Connecting wall; 422. Threaded hole; 423. Positioning groove; 424. Scale mark; 43. Outer ring injector seat; 431. Adjusting screw; 432. Connecting lug; 433. Connecting hole; 434. Positioning protrusion; 44. Outer ring adjusting ring; 45. Air damper plate; 46. Secondary injector slot. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Example

[0024] Reference Figure 1 and Figure 2 The present invention proposes a burner with a multi-stage ejector air intake adjustment structure, including a burner head 10, a gas distribution plate 20, a flame cap 30 and an ejector tube assembly 40. The ejector tube assembly 40 includes a central ejector tube 41, an outer ring ejector tube 42, an outer ring ejector seat 43 and an outer ring adjustment ring 44.

[0025] The air inlet ends of the central ejector tube 41 and the outer ring ejector tube 42 are flared with gradually narrowing cross sections; the outer ring ejector seat 43 is detachably installed at the air inlet end of the outer ring ejector tube 42; the air inlet end of the outer ring ejector seat 43 is flared with gradually narrowing cross sections, and both the air inlet end of the outer ring ejector seat 43 and the air inlet end of the central ejector tube 41 are provided with damper plates 45.

[0026] An adjusting screw 431 is provided at one end of the outer ring ejector seat 43 facing the outer ring ejector tube 42, and an outer ring adjusting ring 44 is threadedly installed on the adjusting screw 431; the outer ring adjusting ring 44 and the air inlet end of the outer ring ejector tube 42 form a secondary ejector groove 46; the outer ring adjusting ring 44 moves on the adjusting screw 431, which can change the spacing of the secondary ejector groove 46.

[0027] In this invention, the adjustable secondary ejector slot 46, composed of the outer ring adjusting ring 44 and the adjusting screw 431, can precisely control the secondary air supply. Combined with the primary ejector at the horn-shaped air inlet, it forms a synergistic effect of two-stage ejection. By adjusting the slot spacing, the air ejection intensity can be dynamically matched according to the actual gas flow rate in the outer ring air supply chamber, effectively solving the limitations of traditional single-damper structures in outer ring ejection adjustment. The modular design of the detachable outer ring ejector seat 43 and the split adjusting ring allows for quick adaptation to differentiated combustion systems such as the swirl distribution plate 20 and multi-ring burner cap 30 by replacing ejector seats or adjusting rings of different sizes, meeting stable combustion requirements while reducing development and maintenance costs.

[0028] In this embodiment, the two-stage dynamic control of the gas-air mixture is achieved through the coordinated design of the adjustable secondary ejector slot 46 and the double-flare-shaped air intake end. When the outer ring adjustment ring 44 moves axially along the adjustment screw 431, the spacing of the secondary ejector slot 46 can precisely adjust the amount of secondary air replenishment, forming a composite ejection mode of "first-stage flare-mouth ejection (main ejection) + second-stage slot ejection (auxiliary ejection)".

[0029] In this embodiment, the air inlet end of the outer ring ejector seat 43 and the air inlet end of the central ejector tube 41 are flush. This flush arrangement eliminates the flow field interference effect caused by misalignment of the air inlet ends in traditional structures. It also facilitates the installation and use of existing plug valves.

[0030] In this embodiment, two connecting walls 421 are provided on both sides of the outer ring ejector tube 42; two connecting ears 432 are provided on both sides of the outer ring ejector seat 43; the connecting ears 432 are detachably installed on the connecting walls 421. The connecting walls 421 are provided with threaded holes 422 and positioning grooves 423; the connecting ears 432 are provided with connecting holes 433 and positioning protrusions 434; the connecting holes 433 correspond to the threaded holes 422, and the positioning protrusions 434 can be engaged with the positioning grooves 423. The modular quick-release structure of the connecting ears 432 and the connecting walls 421, with the positioning protrusions 434 cooperating with the positioning grooves 423 and the threaded holes 422 cooperating with the connecting holes 433, enables tool-free assembly and high-precision positioning of the outer ring ejector seat 43.

[0031] In some embodiments, in order to facilitate the adjustment of the position of the alignment outer ring adjustment ring 44, a scale mark 424 is provided on the connecting wall 421.

[0032] Specifically, the outer ring adjusting ring 44 has toothed protrusions on its outer periphery, forming an anti-slip and friction-increasing outer surface. The toothed structure increases the frictional torque during manual rotation, preventing the adjusting ring from being accidentally displaced due to vibration or airflow impact.

[0033] 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 burner having a multi-stage ejector air regulation structure, comprising a burner tip (10), a gas distribution disc (20), a flame cap (30) and an ejector tube assembly (40); characterized in that: The ejector assembly (40) includes a central ejector (41), an outer ring ejector (42), an outer ring ejector seat (43), and an outer ring adjusting ring (44); The air inlet ends of the central ejector tube (41) and the outer ring ejector tube (42) are flared with gradually narrowing cross sections; the outer ring ejector seat (43) is detachably installed at the air inlet end of the outer ring ejector tube (42); the air inlet end of the outer ring ejector seat (43) is flared with gradually narrowing cross sections, and both the air inlet end of the outer ring ejector seat (43) and the air inlet end of the central ejector tube (41) are provided with damper plates (45); An adjusting screw (431) is provided at one end of the outer ring ejector seat (43) facing the outer ring ejector tube (42), and the outer ring adjusting ring (44) is threaded onto the adjusting screw (431); the outer ring adjusting ring (44) and the air inlet end of the outer ring ejector tube (42) form a secondary ejector groove (46); the outer ring adjusting ring (44) can move on the adjusting screw (431) to change the spacing of the secondary ejector groove (46).

2. The combustor with multi-stage ejector bleed air regulation architecture of claim 1, wherein: The air inlet end of the outer ring ejector seat (43) and the air inlet end of the central ejector tube (41) are flush.

3. The combustor with multi-stage ejector bleed air regulation architecture of claim 1, wherein: The outer ring ejector tube (42) has two connecting walls (421) on its lateral sides; the outer ring ejector seat (43) has two connecting ears (432) on its sides; the connecting ears (432) are detachably installed on the connecting walls (421).

4. The combustor with multi-stage ejector bleed air regulation architecture of claim 3, wherein: The connecting wall (421) is provided with a threaded hole (422) and a positioning groove (423); the connecting ear (432) is provided with a connecting hole (433) and a positioning protrusion (434); the connecting hole (433) corresponds to the threaded hole (422), and the positioning protrusion (434) can be inserted into the positioning groove (423).

5. The burner with a multi-stage ejector intake regulating structure according to claim 3, characterized in that: The connecting wall (421) is provided with scale markings (424).

6. The combustor with multi-stage ejector bleed air regulation architecture of claim 1, wherein: The outer ring adjusting ring (44) has toothed protrusions on its outer periphery.

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