Single-cavity double-fire-ring furnace end
The single-chamber dual-flame ring burner head supports the flame cover and integrated detection needle through a central extension plate, which solves the problems of numerous parts and poor positioning accuracy of traditional burners, and achieves higher combustion stability and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 佛山市宇煜五金有限公司
- Filing Date
- 2026-03-31
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional dual-ring burners have many parts, large size, high processing precision, and high cost. The flame cap positioning accuracy is poor, and the ignition needle and detection needle are prone to aging and have a short service life.
It adopts a single-cavity double-fire ring burner head structure, with the burner cover supported by a central extension plate, and integrates detection needle and ignition needle. This reduces the number of parts, improves positioning accuracy, realizes double-fire ring combustion, enhances airflow mixing and heat dissipation, and avoids heat accumulation.
It reduces production costs and assembly difficulty, improves flame distribution uniformity and service life, prevents high-temperature aging of ignition needles and detection needles, and enhances combustion stability and efficiency.
Smart Images
Figure CN122015088A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of burners, and more specifically, to a single-chamber double-fire ring burner head. Background Technology
[0002] Currently, most household gas stoves use top-intake burners. Traditional dual-ring burners mostly adopt dual-chamber, dual-gas-channel or multi-channel structures, which have problems such as a large number of parts, large size, high requirements for processing and assembly precision, and high production costs. At the same time, the burner caps of such burners are mostly simply placed, with poor positioning accuracy, easy to shift, and easy to rotate, resulting in uneven flame distribution.
[0003] Furthermore, in the aforementioned traditional burner structure, although the ignition needle and detection needle are installed in the center (while in a single-ring burner they are installed on the outside of the burner cap), the center of the burner head only has a through hole to accommodate the ignition needle and detection needle. Even if there is a secondary air supply hole in the center, the airflow will not directly contact the ignition needle and detection needle. Under long-term burning conditions, the temperature of the ignition needle and detection needle is transferred to the root. Due to the inability to dissipate heat, it will cause high-temperature aging and damage, resulting in difficulty in ignition, failure of flameout protection, and short service life. Summary of the Invention
[0004] In order to overcome the defects of the existing technology, the present invention provides a single-cavity double-fire ring furnace head to solve the problems in the existing technology.
[0005] The technical solution adopted by this invention to solve its technical problem is: a single-cavity double-fire ring furnace head, comprising: The base includes a cylindrical body with a cavity that is open at the bottom. A positioning cover is provided on the upper end of the cavity, and a detection needle and an ignition needle are installed on the positioning cover. A burner, the burner including a flame cap, the lower end of the flame cap being covered with a base plate, and a premixing chamber being formed between the flame cap and the base plate; The fire cap has a through hole in the center, and the inner wall of the through hole is provided with an extension plate extending inward. The extension plate corresponds to the positioning cover, and the positioning cover is used to position and support the extension plate, so that a gap is formed between the base plate and the base.
[0006] After achieving the above structure, a single-chamber structure is used to realize dual-flame ring combustion, replacing the traditional dual-chamber, dual-gas-channel structure. This reduces the number of parts, decreases the volume, and lowers the difficulty of processing and assembly, as well as production costs. Moreover, the burner cap is supported by a positioning cover through a central extension plate, ensuring stable placement, improving positioning accuracy, preventing offset and rotation, and guaranteeing uniform flame distribution. A premixing chamber is formed between the burner cap and the base plate, which is conducive to the full mixing of gas and air, improving combustion stability. At the same time, the positioning cover integrates the detection needle and ignition needle. Since the extension plate extends from the inner wall of the through hole towards the center, the gap is connected to the through hole, allowing the through hole to accommodate airflow for secondary air replenishment. Simultaneously, the airflow can directly contact the detection needle and ignition needle, preventing a large amount of heat from the detection needle and ignition needle from being transferred downwards. Furthermore, the lower end of the cavity is open, further preventing heat accumulation, effectively delaying aging, and improving service life.
[0007] In the above-mentioned single-cavity double-flame ring furnace head, the positioning cover is provided with a raised first positioning seat and a second positioning seat, the detection needle is installed inside the first positioning seat, the ignition needle is installed inside the second positioning seat, and the lower ends of the detection needle and the ignition needle extend into the cavity. The extension plate has a first recessed notch on one side and a second recessed notch on the other side. The first notch is mounted on a first positioning seat, and the second notch is mounted on a second positioning seat.
[0008] After the above structure is achieved, both the first notch and the second notch are concave, so that the first notch and the second notch are open towards the center of the through hole. During the secondary air replenishment process at the center of the flame cap, the central airflow is realized, and the detection needle and ignition needle can be passively cooled. At the same time, the first positioning seat and the second positioning seat are passively cooled, avoiding heat accumulation that leads to high-temperature aging.
[0009] In the above-mentioned single-cavity double-flame ring burner head, a convex ring is provided on the burner cover, and multiple external flame holes communicating with the premixing cavity are provided on the outer side of the convex ring, and multiple internal flame holes communicating with the premixing cavity are provided on the inner side of the convex ring, with the input end of the internal flame hole being lower than the input end of the external flame hole.
[0010] After achieving the above structure, the inner and outer double flame holes of the single flame cap can be supplied simultaneously through a single premixing chamber, further simplifying the structure. There is no need for dual gas channels. The flame distribution of the double flame rings is uniform, with a large heating range and stable combustion. This avoids the uneven flame caused by the different offsets of the traditional double flame caps. At the same time, the input end of the inner flame hole is lower than that of the outer flame hole, which allows the premixed gas to be input into the inner flame hole for faster ignition and makes the inner flame closer to the detection needle and ignition needle, resulting in better detection effect.
[0011] In the above-mentioned single-cavity double-fire ring furnace head, the first positioning seat is a square column, the first notch is a square hole, and the lower end face of the first notch is provided with a first step so that the first step is supported on the upper end face of the first positioning seat. The second positioning seat is cylindrical, the second notch is a circular hole, and the lower end face of the second notch is provided with a second step so that the second step is supported on the second positioning seat.
[0012] After implementing the above structure, the first positioning seat and the first notch adopt a square fit to achieve circumferential positioning and completely prevent the flame cap from rotating or misaligning. The second positioning seat and the second notch adopt a circular fit to facilitate assembly and alignment. At the same time, the position of the flame cap on the base is consistent after each assembly. Moreover, the stepped support structure makes the contact area large and the force uniform, making the flame cap support more stable and further improving the positioning reliability.
[0013] In the above-mentioned single-cavity double-flame ring burner, a connecting plate is provided on one side of the outer wall of the cylinder, a gas connection seat is provided at the lower end of the connecting plate, a nozzle seat is provided at the upper end of the connecting plate and communicates with the gas connection seat, and a protrusion for supporting the base plate is provided on the upper end surface of the nozzle seat.
[0014] After implementing the above structure, the nozzle seat is equipped with a protruding support base plate, which retains an air intake gap below the base plate to ensure smooth air intake from the top, improve the premixing effect, and at the same time reduce the contact area between the base plate and the nozzle seat, lower the temperature of the nozzle seat, and prevent the internal gas from colliding and reducing the density due to the high temperature of the nozzle seat.
[0015] In the above-mentioned single-cavity double-fire ring furnace head, slots are provided on both sides of the upper end of the cylinder, a first fixing ear is provided in the slot, and a second fixing ear is provided on both sides of the positioning cover. The second fixing ear is embedded in the slot, and corresponding connection holes are provided on the first fixing ear and the second fixing ear.
[0016] After the above structure is implemented, the positioning cover is reliably connected to the cylinder through the fixing ear, which prevents the positioning cover from loosening and shifting, and ensures the long-term positioning stability of the flame cover and the needle body. Moreover, the slot-embedded installation makes the positioning more accurate, the disassembly and assembly more convenient, and facilitates maintenance and replacement of parts.
[0017] In the aforementioned single-cavity double-fire ring burner head, a first inclined surface is provided on the outer side of the convex ring, a second inclined surface is provided on the inner side of the convex ring, a plurality of external fire holes are opened on the first inclined surface, and a plurality of internal fire holes are opened on the second inclined surface.
[0018] After the above structure is implemented, the flames emitted from the outer and inner fire holes are inclined to burn outward, increasing the contact area between the flame and the bottom of the pot, improving heat efficiency, and the inclined flame structure helps the flame to stably detach from the fire holes, reducing backfire and flame separation phenomena.
[0019] In the above-mentioned single-cavity double-fire ring burner, the angle between the cross-sectional line of the first inclined surface and the bottom plate is in the range of 50-65°, and the angle between the cross-sectional line of the second inclined surface and the bottom plate is in the range of 25-35°, so that a pressurization area is formed between the first inclined surface and the second inclined surface. A premixing area is provided below the pressurization area. The width of the premixing area is greater than that of the pressurization area. The premixing area and the pressurization area form the premixing cavity.
[0020] After the above structure is implemented, the premixed gas in the premixing area enters the pressurization area, which allows the premixed gas to be pressurized and ejected from the outer and inner flame holes to ensure the stability of the flame. At the same time, it improves the uniformity of gas and air mixing, resulting in more complete combustion, higher combustion efficiency, and better flue gas emissions. It also reduces local high temperature points, which is beneficial to protecting the needle in the center.
[0021] In the above-mentioned single-cavity double-flame ring burner head, the burner cover and the bottom plate are both made of stainless steel. A gas guide groove is stamped on the bottom plate. The lower end of the gas guide groove protrudes relative to the lower end face of the bottom plate, and an air inlet is provided at the end of the gas guide groove facing the nozzle seat.
[0022] After achieving the above structure, the nozzle on the nozzle seat injects gas into the air inlet, allowing the gas and air to enter the premixing chamber through the air guide groove. The entire structure is relatively simpler, and the processing technology is simpler.
[0023] The beneficial effects of this invention are that, compared with the traditional dual-cavity, dual-gas-channel structure, the single-cavity dual-flame ring burner head can reduce the number of parts, reduce the volume, reduce the difficulty of processing and assembly and production costs, stabilize the burner cap, improve positioning accuracy, avoid offset and rotation, ensure uniform flame distribution, and prevent a large amount of heat from the detection needle and ignition needle from being transferred downwards, further eliminating heat accumulation, effectively delaying aging and improving service life. Attached Figure Description
[0024] Figure 1 This is one of the three-dimensional structural schematic diagrams of the single-cavity double-fire ring furnace head in this embodiment.
[0025] Figure 2 This is the second three-dimensional structural schematic diagram of the single-cavity double-fire ring furnace head in this embodiment.
[0026] Figure 3 This is a cross-sectional view of the single-cavity double-fire ring furnace head in this embodiment.
[0027] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.
[0028] Figure 5 for Figure 3 A magnified structural diagram at point B in the middle.
[0029] Figure 6 This is a schematic diagram of the exploded structure of the burner.
[0030] Figure 7 This is a schematic diagram of the cross-sectional structure of the burner.
[0031] Figure 8 This is a top view of the flame cap structure.
[0032] Figure 9 This is a schematic diagram of the exploded structure of the base.
[0033] Figure 10 This is a schematic diagram of the three-dimensional structure of the base.
[0034] In the figure: base 1, cylinder 10, connecting plate 11, gas connection seat 12, nozzle seat 13, protrusion 130, cavity 14, slot 15, first fixing ear 16, positioning cover 17, first positioning seat 170, second positioning seat 171, detection needle 172, ignition needle 173, second fixing ear 18; Burner 2, flame cap 20, base plate 201, premixing chamber 202, air inlet 203, convex ring 21, first inclined surface 22, outer flame hole 23, second inclined surface 24, inner flame hole 25, through hole 26, extension plate 27, first notch 28, first step 280, second notch 29, second step 290. Detailed Implementation
[0035] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0036] Combination Figures 1 to 10The single-cavity dual-flame ring burner shown includes a base 1 and a burner 2. The base 1 includes a cylindrical body 10, and a cavity 14 with an open lower end is provided inside the cylindrical body 10. A positioning cover 17 is provided on the upper end of the cavity 14, and a detection needle 172 and an ignition needle 173 are installed on the positioning cover 17. The burner 2 includes a flame cap 20, and a base plate 201 is provided on the lower end of the flame cap 20, forming a premixing cavity 202 between the flame cap 20 and the base plate 201. A through hole 26 is provided in the center of the flame cap 20, and an extension plate 27 extending inward is provided on the inner wall of the through hole 26. The extension plate 27 corresponds to the positioning cover 17. The positioning cover 17 is used to position and support the extension plate 27, so that a gap is formed between the base plate 201 and the base 1. This embodiment uses a single-cavity structure to achieve dual-flame ring combustion, replacing the traditional dual-cavity, dual-gas-channel structure, reducing the number of parts, reducing the volume, and reducing the difficulty of processing and assembly. The design improves efficiency and production costs. Furthermore, the burner cap 20 is supported by the positioning cover 17 via the central extension plate 27, ensuring stable placement, improved positioning accuracy, preventing offset and rotation, and guaranteeing uniform flame distribution. A premixing chamber 202 is formed between the burner cap 20 and the base plate 201, facilitating thorough mixing of gas and air and enhancing combustion stability. Simultaneously, the positioning cover 17 integrates the detection needle 172 and the ignition needle 173. Since the extension plate 27 extends from the inner wall of the through hole 26 towards the center, the gap connects with the through hole 26, allowing the through hole 26 to accommodate airflow for secondary air replenishment. Simultaneously, the airflow can directly contact the detection needle 172 and the ignition needle 173, preventing a large amount of heat from being transferred downwards. Moreover, the lower end of the cavity 14 is open, further preventing heat accumulation, effectively delaying aging, and improving service life.
[0037] Specifically, in this embodiment, the positioning cover 17 is provided with a raised first positioning seat 170 and a second positioning seat 171. A detection needle 172 is installed inside the first positioning seat 170, and an ignition needle 173 is installed inside the second positioning seat 171. The lower ends of the detection needle 172 and the ignition needle 173 both extend into the cavity 14. One side of the extension plate 27 is provided with a concave first notch 28, and the other side is provided with a concave second notch 29. The first notch 28 is mounted on the first positioning seat 170, and the second notch 29 is mounted on the second positioning seat 171. Both the first notch 28 and the second notch 29 are concave, so that the first notch 28 and the second notch 29 are open towards the center of the through hole 26. During the secondary air replenishment process at the center of the flame cover 20, the central airflow is realized, and the detection needle 172 and the ignition needle 173 can be passively cooled. At the same time, the first positioning seat 170 and the second positioning seat 171 can be passively cooled, avoiding heat accumulation that leads to high-temperature aging.
[0038] In this embodiment, the flame cap 20 is provided with a convex ring 21. The outer side of the convex ring 21 is provided with multiple outer flame holes 23 that communicate with the premixing chamber 202, and the inner side of the convex ring 21 is provided with multiple inner flame holes 25 that communicate with the premixing chamber 202. The inner and outer flame holes of the single flame cap 20 can be supplied simultaneously through a single premixing chamber 202, which further simplifies the structure, eliminates the need for dual gas channels, and ensures uniform flame distribution of the dual flame rings, a large heating range, and stable combustion. This avoids the uneven flame caused by the different offsets of traditional dual flame caps. At the same time, the input end of the inner flame hole 25 is lower than that of the outer flame hole 23, which allows the premixed gas to be input into the inner flame hole 25 for faster ignition and makes the inner flame closer to the detection needle 172 and the ignition needle 173, resulting in better detection effect.
[0039] In this embodiment, the first positioning seat 170 is a square column, the first notch 28 is a square hole, and the lower end face of the first notch 28 is provided with a first step 280, so that the first step 280 is supported on the upper end face of the first positioning seat 170. The second positioning seat 171 is cylindrical, the second notch 29 is a circular hole, and the lower end face of the second notch 29 is provided with a second step 290, so that the second step 290 is supported on the second positioning seat 171. The first positioning seat 170 and the first notch 28 adopt a square fit to achieve circumferential positioning and completely prevent the flame cap 20 from rotating or misaligning. The second positioning seat 171 and the second notch 29 adopt a circular fit, which facilitates assembly and alignment. At the same time, after each assembly, the position of the flame cap 20 on the base 1 is consistent. Moreover, the stepped support structure makes the contact area large and the force uniform, and the flame cap 20 is supported more stably, further improving the positioning reliability.
[0040] In this embodiment, a connecting plate 11 is provided on one side of the outer wall of the cylinder 10. A gas connection seat 12 is provided at the lower end of the connecting plate 11, and a nozzle seat 13 connected to the gas connection seat 12 is provided at the upper end of the connecting plate 11. A protrusion 130 for supporting the base plate 201 is provided on the upper surface of the nozzle seat 13. The protrusion 130 of the nozzle seat 13 supports the base plate 201, so that an air intake gap is retained below the base plate 201, ensuring smooth air intake from the top, improving the premixing effect, and reducing the contact area between the base plate 201 and the nozzle seat 13, reducing the temperature of the nozzle seat 13, and preventing the internal gas from colliding and reducing the density due to the high temperature of the nozzle seat 13.
[0041] In this embodiment, slots 15 are provided on both sides of the upper end of the cylinder 10, and first fixing ears 16 are provided in the slots 15. Second fixing ears 18 are provided on both sides of the positioning cover 17. The second fixing ears 18 are embedded in the slots 15. Corresponding connecting holes are provided on the first fixing ears 16 and the second fixing ears 18. The positioning cover 17 is reliably connected to the cylinder 10 through the fixing ears, which prevents the positioning cover 17 from loosening and shifting, and ensures the long-term positioning stability of the flame cover 20 and the needle body. Moreover, the slot embedding installation makes the positioning more accurate, the disassembly and assembly more convenient, and facilitates maintenance and replacement of parts.
[0042] The outer side of the convex ring 21 is provided with a first inclined surface 22, and the inner side of the convex ring 21 is provided with a second inclined surface 24. Multiple outer flame holes 23 are opened on the first inclined surface 22, and multiple inner flame holes 25 are opened on the second inclined surface 24. This causes the flames emitted from the outer flame holes 23 and the inner flame holes 25 to burn outward at an angle, increasing the contact area between the flame and the bottom of the pot, improving heat efficiency. Moreover, the inclined flame outlet structure is conducive to the stable detachment of the flame from the flame holes, reducing backfire and flame separation phenomena.
[0043] In this embodiment, the angle between the cross-sectional line of the first inclined surface 22 and the base plate 201 ranges from 50 to 65°, preferably 60°, and the angle between the cross-sectional line of the second inclined surface 24 and the base plate 201 ranges from 25 to 35°, preferably 30°, so that a pressurization region is formed between the first inclined surface 22 and the second inclined surface 24. A premixing region is provided below the pressurization region. The width of the premixing region is greater than that of the pressurization region. The premixing region and the pressurization region form a premixing cavity 202. After the premixed gas in the premixing region enters the pressurization region, it can be pressurized and ejected from the outer flame hole 23 and the inner flame hole 25 to ensure the stability of the flame, while improving the uniformity of gas and air mixing, resulting in more complete combustion, higher combustion efficiency, and better flue gas emission. At the same time, it reduces local high temperature points, which is beneficial to protect the central needle.
[0044] It is also worth noting that the outer flame hole 23 is also inclined in the first inclined surface 22. The angle between the axis of the outer flame hole 23 and the bottom plate 201 is 35°, so that the outer flame hole 23 is inclined upward and can better cover the entire bottom of the pot. The inner flame hole 25 is also inclined in the second inclined surface 24. The angle between the axis of the inner flame hole and the bottom plate 201 is 40°, so that the inner flame hole 25 is inclined upward and can better cover the middle of the bottom of the pot.
[0045] In this embodiment, both the flame cap 20 and the base plate 201 are made of stainless steel. A gas guide groove 202 is stamped on the base plate 201. The lower end of the gas guide groove 202 protrudes from the lower end face of the base plate 201, and an air inlet 203 is opened at the end of the gas guide groove 202 facing the nozzle seat 13. The nozzle on the nozzle seat 13 injects gas into the air inlet 203, so that the gas and air enter the premixing chamber 202 through the gas guide groove 202. The whole structure is relatively simple and the processing technology is simpler.
[0046] Those skilled in the art will understand that the parameters in the above embodiments can be adjusted according to actual application scenarios such as household countertop stoves and commercial stoves. For example, the diameter of the premixing chamber chassis, the taper of the premixing section, the angle of the slope, the radius of the arc, etc. All parameter adjustments made based on the core technical solution of the present invention are within the protection scope of the present invention.
Claims
1. A single-cavity double-flame ring furnace head, characterized in that, include: The base (1) includes a cylindrical body (10), and a cavity (14) with an open lower end is provided inside the cylindrical body (10). A positioning cover (17) is provided on the upper end of the cavity (14), and a detection needle (172) and an ignition needle (173) are installed on the positioning cover (17). The burner (2) includes a flame cap (20), the lower end of which is covered with a base plate (201), and a premixing chamber (202) is formed between the flame cap (20) and the base plate (201). The fire cap (20) has a through hole (26) in the center. The inner wall of the through hole (26) is provided with an extension plate (27) extending inward. The extension plate (27) corresponds to the positioning cover (17). The positioning cover (17) is used to position and support the extension plate (27), so that a gap is formed between the base plate (201) and the base (1).
2. The single-chamber double-fire ring furnace head according to claim 1, characterized in that, The positioning cover (17) is provided with a raised first positioning seat (170) and a second positioning seat (171). The detection needle (172) is installed inside the first positioning seat (170), and the ignition needle (173) is installed inside the second positioning seat (171). The lower ends of the detection needle (172) and the ignition needle (173) extend into the cavity (14). The extension plate (27) has a first recessed notch (28) on one side and a second recessed notch (29) on the other side. The first notch (28) is mounted on the first positioning seat (170) and the second notch (29) is mounted on the second positioning seat (171).
3. A single-cavity double-fire ring furnace head according to claim 2, characterized in that, The flame cap (20) is provided with a protruding ring (21). The outer side of the protruding ring (21) is provided with a plurality of external flame holes (23) that communicate with the premixing chamber (202). The inner side of the protruding ring (21) is provided with a plurality of internal flame holes (25) that communicate with the premixing chamber (202). The input end of the internal flame hole (25) is lower than the input end of the external flame hole (23).
4. A single-cavity double-fire ring furnace head according to claim 2, characterized in that, The first positioning seat (170) is a square column, the first notch (28) is a square hole, and the lower end face of the first notch (28) is provided with a first step (280) so that the first step (280) is supported on the upper end face of the first positioning seat (170). The second positioning seat (171) is cylindrical, the second notch (29) is a circular hole, and the lower end face of the second notch (29) is provided with a second step (290) so that the second step (290) is supported on the second positioning seat (171).
5. A single-cavity double-fire ring furnace head according to claim 2, characterized in that, A connecting plate (11) is provided on one side of the outer wall of the cylinder (10). A gas connection seat (12) is provided at the lower end of the connecting plate (11). A nozzle seat (13) connected to the gas connection seat (12) is provided at the upper end of the connecting plate (11). A protrusion (130) for supporting the base plate (201) is provided on the upper surface of the nozzle seat (13).
6. A single-cavity double-fire ring furnace head according to claim 5, characterized in that, The upper end of the cylinder (10) is provided with slots (15) on both sides, and a first fixing ear (16) is provided in the slot (15). The positioning cover (17) is provided with a second fixing ear (18) on both sides. The second fixing ear (18) is embedded in the slot (15). The first fixing ear (16) and the second fixing ear (18) are provided with corresponding connecting holes.
7. A single-cavity double-fire ring furnace head according to claim 3, characterized in that, The outer side of the convex ring (21) is provided with a first inclined surface (22), the inner side of the convex ring (21) is provided with a second inclined surface (24), a plurality of outer fire holes (23) are opened on the first inclined surface (22), and a plurality of inner fire holes (25) are opened on the second inclined surface (24).
8. A single-cavity double-fire ring furnace head according to claim 7, characterized in that, The angle between the cross-section line of the first inclined surface (22) and the base plate (201) is in the range of 50-65°, and the angle between the cross-section line of the second inclined surface (24) and the base plate (201) is in the range of 25-35°, so that a pressurization area is formed between the first inclined surface (22) and the second inclined surface (24). A premixing area is provided below the pressurization area. The width of the premixing area is greater than that of the pressurization area. The premixing area and the pressurization area form the premixing cavity (202).
9. A single-cavity double-fire ring furnace head according to claim 5, characterized in that, Both the flame cap (20) and the base plate (201) are made of stainless steel. A gas guide groove (202) is stamped on the base plate (201). The lower end of the gas guide groove (202) protrudes relative to the lower end face of the base plate (201), and an air inlet (203) is provided at the end of the gas guide groove (202) facing the nozzle seat (13).