Furnace end and burner thereof

Abstract

The utility model discloses a furnace end and a burner thereof, the furnace end comprises a furnace end main body which is provided with a central cavity with an upward opening, an inner ring air inlet and an outer ring air inlet, and the lower end of the central cavity is communicated with the inner ring air inlet; the furnace end upper cover is connected to the top of the furnace end main body, the furnace end upper cover is provided with an inner ring gas outlet and a plurality of outer ring gas outlets, the inner ring gas outlet is communicated with the upper end of the central cavity to form an inner ring gas channel, and the plurality of outer ring gas outlets are circumferentially formed in the periphery of the inner ring gas outlet at intervals; the furnace end upper cover and the furnace end body are enclosed to form a closed annular air cavity located on the periphery of the inner ring air channel, the radial inner end of the annular air cavity communicates with the outer ring air inlet, and the radial outer end of the annular air cavity communicates with the outer ring air outlets. According to the furnace end, the uniform pressure of each outer ring air outlet is ensured, the flame of the outer ring reaches a uniform state, and the combustion noise can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a stove head and its burner. Background Technology

[0002] Most existing burners have two or more gas channels, with the outer ring having a larger diameter and offset from the center. However, the outer ring's exhaust port near the injector has a higher gas velocity and volume, resulting in uneven flame distribution. This also leads to louder combustion noise at the faster-moving areas of the outer ring burner holes. When using a high-efficiency pot support, the flame burns in a semi-enclosed space, amplifying the combustion noise. This is especially true for ultra-high-efficiency stoves with a relatively small pot support, where the pot pushes the flame even lower, and the enclosed space further increases the combustion noise, particularly if the regional pressure is higher than the rated value. These adverse conditions are exacerbated when this burner is used with a forced-air burner.

[0003] The existing burner head with two independent air outlets also causes uneven pressure and uneven flame, requiring measures such as adding baffles to make the combustion more uniform. However, for high-performance burners, especially forced-air burners, the uneven flame becomes more obvious after the first air injection. Moreover, due to the limitation of the outer ring size, the outer ring air outlet of this burner head is very small and does not meet the design requirements. Summary of the Invention

[0004] This invention aims to at least partially solve one of the problems existing in the prior art. To this end, this invention proposes a burner head that ensures uniform pressure at each outer ring gas outlet, thereby achieving a uniform outer ring flame and reducing combustion noise. This invention also provides a burner.

[0005] The burner head provided above is achieved through the following technical solution:

[0006] A burner head includes: a burner head body having an upward-opening central cavity, an inner ring air inlet, and an outer ring air inlet, the lower end of the central cavity being connected to the inner ring air inlet; a burner head cover connected to the top of the burner head body, the burner head cover having an inner ring air outlet and multiple outer ring air outlets, the inner ring air outlet being connected to the upper end of the central cavity to form an inner ring air passage, and the multiple outer ring air outlets being circumferentially spaced around the inner ring air outlet; the burner head cover and the burner head body enclose and form a sealed annular air cavity located around the inner ring air passage, the radially inner end of the annular air cavity being connected to the outer ring air inlet, and the radially outer end being connected to the multiple outer ring air outlets.

[0007] In some embodiments, the annular air chamber includes an inner annular cavity and an outer annular cavity located around the inner annular cavity. The height of the inner annular cavity is greater than the height of the outer annular cavity. The outer annular air inlet is connected to the inner annular cavity, and the inner annular cavity is connected to a plurality of outer annular air outlets through the outer annular cavity.

[0008] In some embodiments, the height of the outer ring cavity is 7-9 mm; and / or the bottom surface of the inner ring cavity is lower than the bottom surface of the outer ring cavity, and the top surface of the inner ring cavity is lower than or flush with the top surface of the outer ring cavity.

[0009] In some embodiments, a connecting channel is provided on the burner body between the outer ring air inlet and the central cavity, and the radial inner end of the annular air cavity is connected to the outer ring air inlet through the connecting channel.

[0010] In some embodiments, the connecting channel has a guide surface that is arranged obliquely upward from the outer ring air inlet toward the central cavity, and the opposite sides of the upper end of the guide surface are respectively arranged on opposite outer sides of the central cavity.

[0011] In some embodiments, the burner body is provided with a gas storage chamber at a position away from the inlet of the outer ring air inlet, and the outlet of the outer ring air inlet is connected to the gas storage chamber and the inlet of the connecting channel, respectively.

[0012] In some embodiments, a plurality of partitions are provided at circumferential intervals at the radial outer end of the annular gas cavity. The partitions are arranged radially and fixedly connected to the burner head body or the burner head cover. A gas distribution channel is formed between two adjacent partitions, and the radial inner ends of two adjacent gas distribution channels are connected. The outer annular air inlet is arranged between two adjacent partitions and is connected to the radial outer end of the corresponding gas distribution channel.

[0013] In some embodiments, the radial outer ends of two adjacent gas distribution channels are not connected; or a ventilation gap is formed between the partition and the burner body or the burner cover, and two adjacent gas distribution channels are connected through the ventilation gap.

[0014] In some embodiments, a plurality of positioning structures are provided between the burner top cover and the burner body, located in the annular air cavity and arranged circumferentially; and / or a blocking portion extending outward is provided on the radially inner side wall at the upper end of the outer ring air outlet, and a vent is provided between the radially outer end of the blocking portion and the radially outer side wall of the outer ring air outlet for airflow to pass through.

[0015] In some embodiments, an ejector assembly is also included, which includes an inner ejector tube and an outer ejector tube. The inner ejector tube is connected to the inner ring air inlet to form an inner ring air inlet channel, and the outer ejector tube is connected to the outer ring air outlet to form an outer ring air inlet channel.

[0016] In some embodiments, a blower assembly is also included, the outlet of which is connected to the inner ring air intake channel and / or the outer ring air intake channel, for replenishing the inner ring air intake channel and / or the outer ring air intake channel with primary air.

[0017] The burner provided above is achieved through the following technical solution:

[0018] A burner includes a burner head as described above; an inner burner cap, which covers the top of the burner head cover and communicates with the inner ring gas outlet; an outer burner cap, which covers the top of the burner head cover and has a downward-opening outer ring mixing chamber and a flame hole portion, wherein the flame hole portion communicates with a plurality of the outer ring gas outlets through the mixing chamber; the inlet of the flame hole portion is arranged radially inside the outlet of the outer ring gas outlet, and / or a plurality of circumferentially spaced air replenishment channels are formed between the outer burner cap and the burner head cover.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] 1. The burner head of this utility model has an outer ring air inlet on the burner head body and multiple outer ring air outlets arranged circumferentially on the burner head cover. The burner head cover and the burner head body enclose an annular air cavity. The radial inner end of the annular air cavity is connected to the outer ring air inlet, and the radial outer end is connected to multiple outer ring air outlets. This allows the outer ring gas to first flow to the radial inner end of the annular air cavity to form static pressure, and then flow along the annular air cavity toward its radial outer end, and finally flow upward from each outer ring air outlet. This ensures that the pressure of each outer ring air outlet is uniform, so that the outer ring flame reaches a uniform state, which helps to reduce combustion noise.

[0021] 2. By designing the height of the inner ring cavity to be greater than that of the outer ring cavity, smooth flow can be ensured, while the volume of the inner ring cavity can be appropriately reduced, which helps to reduce the probability of flameout noise. Attached Figure Description

[0022] Figure 1 This is an exploded view of the burner head in Embodiment 1 of this utility model;

[0023] Figure 2 This is an exploded view of the burner assembly in Embodiment 1 of this utility model;

[0024] Figure 3 This is a schematic diagram of the burner head in Embodiment 1 of this utility model;

[0025] Figure 4 This is a cross-sectional view of the burner head in Embodiment 1 of this utility model. Figure 1 ;

[0026] Figure 5 This is a cross-sectional view of the burner head in Embodiment 1 of this utility model. Figure 2 ;

[0027] Figure 6 This is a cross-sectional view of the burner head in Embodiment 1 of this utility model. Figure 3 ;

[0028] Figure 7 This is a schematic diagram of the burner structure in Embodiment 1 of this utility model;

[0029] Figure 8 This is a cross-sectional view of the burner in Embodiment 1 of this utility model;

[0030] Figure 9 This is a schematic diagram of the burner assembly in Embodiment 2 of this utility model;

[0031] Figure 10 This is a cross-sectional view of the burner in Embodiment 2 of this utility model;

[0032] Figure 11 This is a schematic diagram of the burner head in Embodiment 3 of this utility model.

[0033] In the diagram: 1-Burnhead body, 111-Central cavity, 112-Recessed cavity, 121-Inner ring air inlet, 122-Outer ring air inlet, 13-Connecting channel, 131-Guide surface, 14-Gas storage cavity, 15-Positioning groove; 2-Burnhead top cover, 201-Upper recessed cavity, 211-Inner ring air outlet, 212-Outer ring air outlet, 22-Annular air cavity, 221-Inner ring cavity, 222-Outer ring cavity 23-Separation section, 231-Ventilation gap, 24-Positioning post, 251-Blocking section, 252-Ventilation port; 31-Inner ejector tube, 32-Outer ejector tube; 4-Blower assembly; 5-Inner flame cap; 6-Outer flame cap, 611-Lower mixing chamber, 612-Upper mixing chamber, 62-Air inlet, 63-Annular flame hole, 641-Flame stabilizing hole, 642-Flame stabilizing ring, 65-Air replenishment channel. Detailed Implementation

[0034] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0035] Example 1

[0036] refer to Figure 1-6 This embodiment provides a burner head, which is a split-type burner head, including a burner head assembly and an ejector assembly, wherein the ejector assembly includes an inner ejector tube 31 and an outer ejector tube 32. The burner head assembly includes a burner head body 1 and a burner head cover 2. The burner head body 1 has an upward-opening central cavity 111. At the lower end of the burner head body 1, there are horizontally arranged inner ring air inlets 121 and outer ring air inlets 122. The inner ring air inlets 121 are connected to the lower end of the central cavity 111, and the inner ring air inlets are connected to the inner ejector tube 31 to form an inner ring air intake channel. The outer ring air outlet 212 is connected to the outer ejector tube 32 to form an outer ring air intake channel.

[0037] The burner head cover 2 is connected to the top of the burner head body 1. The two can be connected as a whole by screws, riveting, or welding. The burner head cover 2 has an inner ring air outlet 211 and multiple outer ring air outlets 212. The inner ring air outlet 211 is connected to the upper end of the central cavity 111 to form an inner ring air passage (not shown in the figure). The multiple outer ring air outlets 212 are evenly spaced around the inner ring air outlet 211. Reference Figure 4-6 In this embodiment, the burner head cover 2 and the burner head body 1 enclose and form a sealed annular gas cavity 22 located outside the inner annular gas passage. The radially inner end of the annular gas cavity 22 is connected to the outer annular air inlet 122, and the radially outer end is connected to multiple outer annular air outlets 212. As a result, the outer annular gas first flows from the outer annular air inlet 122 to the radially inner end of the annular gas cavity 22 to form static pressure, then flows along the annular gas cavity 22 toward its radially outer end, and finally flows upward from each outer annular air outlet 212. This ensures that the pressure at the radially outer end of the annular gas cavity 22 and each outer annular air outlet is uniform, thereby achieving a uniform outer annular flame, which helps to reduce combustion noise. In addition, it does not affect the secondary air supply of the burner using this burner head.

[0038] refer to Figure 2-5 In this embodiment, a recessed cavity 112 with an upward opening and located around the central cavity 11 is provided at the top of the burner head body 1. Correspondingly, an upper recessed cavity 201 with a downward opening and located around the inner ring air outlet 211 is provided at the bottom of the burner head cover 2. The inlets of the multiple outer ring air outlets 212 are connected to the radial outer end of the upper recessed cavity 201. When the burner head cover 2 is connected and fixed to the top of the burner head body 1, the upper recessed cavity 201 and the lower recessed cavity 112 enclose each other to form a sealed annular air chamber 22. In other embodiments, the upper recessed cavity 201 can be omitted, in which case the annular air chamber 22 is formed by the lower recessed cavity 112 and the bottom surface of the burner head cover 2; or the lower recessed cavity can be omitted, in which case the annular air chamber is formed by the upper recessed cavity 201 and the top surface of the burner head body 1.

[0039] Specifically, the annular gas chamber 22 includes an inner annular cavity 221 and an outer annular cavity 222 located around the inner annular cavity 221. The height H1 of the inner annular cavity 221 is greater than the height H2 of the outer annular cavity 222. The outer annular inlet 122 is connected to the inner annular cavity 221. The inner annular cavity 221 is connected to multiple outer annular outlets 212 through the outer annular cavity 222. This ensures that the outer annular gas flows smoothly in the annular gas chamber 22, while also appropriately reducing the volume of the inner annular cavity 221, which helps to reduce the probability of flameout noise. In addition, since the height and cross-section of the outer annular cavity 222 are the same at all points, the flow velocity of the outer annular gas is consistent at all points in the outer annular cavity 22, thus ensuring that the outer annular gas flow rate is consistent, and consequently, that the gas output of each outer annular outlet 212 is consistent. More specifically, the height of the outer annular cavity 222 is 7-9 mm; and / or the bottom surface of the inner annular cavity 221 is lower than the bottom surface of the outer annular cavity 222, and the top surface of the inner annular cavity 221 is lower than or flush with the top surface of the outer annular cavity 222. In this embodiment, the top surface of the upper concave cavity 201 is a plane, while the radial inner end of the bottom surface of the lower concave cavity 112 is lower than the radial outer end of the bottom surface of the lower concave cavity 112, so that the annular air cavity 22 formed by the upper concave cavity 201 and the lower concave cavity 112 has a larger inner end height and a smaller outer end height, so that the height H1 of the inner annular cavity 221 is greater than the height H2 of the outer annular cavity 222, to prevent airflow obstruction.

[0040] refer to Figure 2-6 The burner body 1 is also provided with a connecting channel 13 located between the outer ring air inlet 122 and the central cavity 111. The radial inner end of the annular gas cavity 22 is connected to the outer ring air inlet 122 through the connecting channel 13, so as to facilitate the outer ring gas at the outer ring air inlet 122 to be concentrated and guided to the inner ring cavity 221 of the annular gas cavity 22, and static pressure is formed in the inner ring cavity 22. Then, it flows along the outer ring cavity 222 of the annular gas cavity 22 to the surrounding outer ring air outlets 212, ensuring that the gas output of each outer ring air outlet is consistent. In this embodiment, the connecting channel 13 has a guide surface 131, which is arranged from the outer ring air inlet 122 toward the central cavity 111 and inclined upward. The two opposite sides of the upper end of the guide surface 131 are respectively arranged on the opposite outer sides of the central cavity 111, so as to facilitate the rapid and smooth flow of the outer ring gas into the inner ring cavity 221 of the annular gas cavity 22. At the same time, it increases the communication area between the connecting channel 13 and the inner ring cavity 221 of the annular gas cavity 22, which is conducive to the rapid overflow of the outer ring gas and filling the inner ring cavity 221.

[0041] refer to Figure 6 The burner body 1 is provided with a gas storage chamber 14 at a position away from the inlet of the outer ring air inlet 122. The outlet of the outer ring air inlet 122 is connected to the gas storage chamber 14 and the inlet of the connecting channel 13 respectively. By setting up the gas storage chamber 14, the airflow is buffered, so that the pressure distribution is more uniform and the airflow flowing in from the outer ring air inlet 122 is prevented from hitting the wall and rebounding, and overflowing in all directions, which would cause the airflow to be uneven.

[0042] refer to Figure 1-5 Multiple circumferentially spaced partitions 23 are provided at the radially outer end of the annular gas chamber 22. The partitions 23 are arranged radially and fixedly connected to the burner head body 1 or the burner head cover 2. A gas distribution channel (not shown in the figure) is formed between two adjacent partitions 23, and the radially inner ends of two adjacent gas distribution channels are connected. The outer ring air inlet 122 is arranged between two adjacent partitions 23 and is connected to the radially outer end of the corresponding gas distribution channel. This allows the outer ring gas to be guided to the radially inner end of the annular gas chamber, and then flows evenly along the gas distribution channel to the corresponding outer ring air outlet, ensuring uniform pressure at each outer ring air outlet.

[0043] In this embodiment, multiple partitions 23 are evenly spaced circumferentially within the outer annular cavity 222 of the annular gas chamber and are integrally formed with the burner head cover 2. A ventilation gap 231 is formed between the partitions 23 and the burner head body 1, and two adjacent gas distribution channels are connected through the ventilation gap 231. In other embodiments, the radial outer ends of two adjacent gas distribution channels may not be connected, in which case the partitions 23 abut against the top of the burner head body; or the partitions 23 are integrally formed on the burner head body 1, in which case a ventilation gap 231 can be formed between the partitions 23 and the burner head cover 2. Of course, the partitions 23 can also be designed to abut against the burner head cover.

[0044] refer to Figure 2-5 Multiple positioning structures (not shown in the figure) are provided between the burner top cover 2 and the burner body 1, located in the annular air cavity 22 and arranged circumferentially at intervals. This enables the burner top cover 2 to be quickly pre-positioned on the burner body 1, while preventing the burner top cover 2 from shifting relative to the burner body. In this embodiment, the positioning structure includes a positioning post 24 and a positioning groove 15 that fit together. The positioning post 24 is integrally formed and protrudes from the partition portion 23 of the burner top cover 2, while the positioning groove 15 is recessed in the burner body 1 at the position corresponding to the positioning post 24.

[0045] refer to Figure 7-8 This embodiment also provides a burner, which includes a burner head, an inner burner cover 5, and an outer burner cover 6 as described above. The inner burner cover 5 is disposed on the top of the burner head cover 2 and is connected to the inner ring gas outlet 211. The outer burner cover 6 is disposed on the top of the burner head cover 2 and has a downward-opening outer ring mixing chamber and a flame hole portion. The flame hole portion is connected to multiple outer ring gas outlets 212 through the mixing chamber.

[0046] The inlet of the burner hole is arranged radially inside the outlet of the outer ring gas outlet 212, thereby making the inlet of the burner hole deviate from the outlet of the outer ring gas outlet 212. This prevents the outer ring gas from flowing upward from the outer ring gas outlet 212 and directly hitting the inlet of the burner hole, reducing the airflow velocity at the burner hole and making the flame of the outer burner cover more uniform. And / or a plurality of circumferentially spaced air supply channels 65 are formed between the outer burner cover 6 and the burner top cover 2. The radially outer end of the air supply channel 65 is connected to the atmosphere, and the radially inner end is connected to the space between the inner ring gas outlet 211 and the outer burner cover 6. This achieves the goal of supplementing secondary air for combustion of the inner burner cover 5 while ensuring the uniformity of the outer ring gas outlet.

[0047] refer to Figure 8 Specifically, the outer ring mixing chamber includes a lower mixing chamber 611 and an upper mixing chamber 612. The upper mixing chamber 612 is located at the radially inner end of the top of the lower mixing chamber 611. The radially outer end of the bottom of the lower mixing chamber 611 is connected to multiple outer ring air outlets 212. The inlet of the flame hole is connected to the radially inner end of the top of the lower mixing chamber 611 through the upper mixing chamber 612, thereby ensuring that the inlet of the flame hole avoids the outer ring air outlets 212. In this embodiment, the flame hole is an annular flame hole 63. The outer flame cap 6 has an air inlet 62 at the position corresponding to the outer ring air outlets 212. The air inlet 62 is arranged radially outside the upper mixing chamber 612 of the outer ring mixing chamber, and the upper and lower ends of the air inlet 62 are respectively connected to the corresponding outer ring air outlets and the radially outer end of the lower mixing chamber 611 of the outer ring mixing chamber, so that the air inlet 62 avoids the inlet of the flame hole of the outer flame cap.

[0048] More specifically, a guide slope is provided on the outer wall of the lower mixing chamber 611 at the position corresponding to the air outlet 62. The guide slope is arranged from the outside to the inside and upward, so that the airflow from the air outlet 62 is buffered by the guide slope and flows into the interior of the lower mixing chamber 611, resulting in a more uniform pressure distribution.

[0049] In this embodiment, the outer flame cap is further provided with a flame stabilizing section. The inlet of the flame stabilizing section is located radially outside the inlet of the flame hole section, and the inlet of the flame stabilizing section is connected to the radially outer end of the lower mixing chamber 611 of the outer annular mixing chamber. This facilitates the improvement of the combustion stability of the outer annular flame and reduces airflow interference between the flame stabilizing section and the flame hole section. In this embodiment, the flame stabilizing section includes a plurality of circumferentially spaced flame stabilizing holes 641 and a flame stabilizing ring 642. The flame stabilizing ring 642 is arranged below the outlet of the flame hole section, and the flame stabilizing ring 642 is connected to the radially outer end of the lower mixing chamber 611 of the outer annular mixing chamber through the flame stabilizing holes 641.

[0050] Example 2

[0051] refer to Figure 9-10The difference between this embodiment and Embodiment 1 is that an outwardly extending blocking portion 251 is provided on the radially inner wall surface at the upper end of each outer ring outlet 212. A vent 252 for airflow is provided between the radially outer end of the blocking portion 251 and the radially outer wall surface of the outer ring outlet 212. Thus, when the outer ring combustion gas flows upward from the outer ring outlet 212, it is buffered after passing through the added blocking portion 251, and then flows radially outward, so that the outer ring combustion gas flowing out of the outer ring outlet 212 is further deflected outward, making the airflow more uniform, and at the same time helping to effectively reduce combustion noise.

[0052] Example 3

[0053] refer to Figure 11 The difference between this embodiment and Embodiments 1 or 2 is that the burner head further includes a blower assembly 4. The air outlet of the blower assembly 4 is connected to the inner ring air intake channel and / or the outer ring air intake channel, and is used to supplement primary air into the inner ring air intake channel and / or the outer ring air intake channel. This increases the primary air coefficient of the burner head through the blower assembly 4, thereby strengthening the introduction of primary air, resulting in more complete premixing, more complete combustion, enhanced combustion performance, and effectively improved thermal efficiency.

[0054] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A burner tip, characterized by, The application relates to a furnace head, which comprises a furnace head body (1) provided with a central cavity (111) with an upward opening, an inner ring air inlet (121) and an outer ring air inlet (122), wherein the lower end of the central cavity (111) is communicated with the inner ring air inlet (121); a furnace head upper cover (2) connected to the top of the furnace head body (1), wherein the furnace head upper cover (2) is provided with an inner ring air outlet (211) and a plurality of outer ring air outlets (212), the inner ring air outlet (211) is communicated with the upper end of the central cavity (111) to form an inner ring air channel, and the plurality of outer ring air outlets (212) are circumferentially spaced and arranged on the periphery of the inner ring air outlet (211); the furnace head upper cover (2) and the furnace head body (1) are combined to form a ring-shaped air cavity (22) located on the periphery of the inner ring air channel and being closed, the radial inner end of the ring-shaped air cavity (22) is communicated with the outer ring air inlet (122), and the radial outer end of the ring-shaped air cavity (22) is communicated with the plurality of outer ring air outlets (212). The ring-shaped air cavity (22) comprises an inner ring cavity (221) and an outer ring cavity (222) located on the periphery of the inner ring cavity (221), the height of the inner ring cavity (221) is greater than that of the outer ring cavity (222), the outer ring air inlet (122) is communicated with the inner ring cavity (221), and the inner ring cavity (221) is communicated with the plurality of outer ring air outlets (212) through the outer ring cavity (222). The height of the outer ring cavity (222) is 7-9 mm; and / or the cavity bottom surface of the inner ring cavity (221) is lower than that of the outer ring cavity (222), and the cavity top surface of the inner ring cavity (221) is lower than or flush with that of the outer ring cavity (222). A connecting channel (13) is arranged on the furnace head body (1) between the outer ring air inlet (122) and the central cavity (111), and the radial inner end of the ring-shaped air cavity (22) is communicated with the outer ring air inlet (122) through the connecting channel (13).

2. A burner tip as defined in claim 1, characterized in that The connecting channel (13) has a flow guide surface (131), the flow guide surface (131) is arranged to be inclined upward from the outer ring air inlet (122) to the central cavity (111), and the opposite sides of the upper end of the flow guide surface (131) are arranged on the opposite outer sides of the central cavity (111).

3. A burner tip as defined in claim 2, wherein The furnace head body (1) is provided with a gas storage cavity (14) at the position away from the inlet of the outer ring air inlet (122), and the gas outlet end of the outer ring air inlet (122) is communicated with the gas storage cavity (14) and the inlet of the connecting channel (13) respectively.

4. A burner tip as in any of claims 1-3, characterized in that A plurality of separation portions (23) are circumferentially spaced and arranged at the radial outer end of the ring-shaped air cavity (22), the separation portions (23) are arranged along the radial direction and are fixedly connected with the furnace head body (1) or the furnace head upper cover (2), a gas distribution channel is formed between two adjacent separation portions (23), and the radial inner ends of two adjacent gas distribution channels are communicated; the outer ring air inlet (122) is arranged between two adjacent separation portions (23) and is communicated with the radial outer end of the corresponding gas distribution channel.

5. A burner tip as defined in claim 4, wherein ​ 6. A burner tip as defined in claim 4, wherein ​ 7. A burner tip as in any of claims 1-3, wherein ​ 8. A burner tip as defined in claim 7, wherein The radial outer ends of two adjacent gas distribution channels are not connected; or a gas distribution gap (231) is formed between the partition (23) and the burner head main body (1) or the burner head upper cover (2), and two adjacent gas distribution channels are connected through the gas distribution gap (231).

9. A burner tip as in any of claims 1-3, wherein A plurality of positioning structures are arranged in the annular gas cavity (22) and are circumferentially spaced apart between the burner head upper cover (2) and the burner head main body (1); and / or a radially inner side wall surface of the outer ring gas outlet (212) is provided with an outwardly extending blocking portion (251), and a gas flow passage (252) is left between the radially outer end of the blocking portion (251) and the radially outer side wall surface of the outer ring gas outlet (212).

10. A burner tip as in any of claims 1-3, wherein Further comprising an ejector assembly, the ejector assembly comprises an inner ejector pipe (31) and an outer ejector pipe (32), the inner ejector pipe (31) is connected to the inner ring gas inlet (121) to form an inner ring gas inlet channel, and the outer ejector pipe (32) is connected to the outer ring gas outlet (212) to form an outer ring gas inlet channel.

11. A burner tip as defined in claim 10, wherein Further comprising a blast assembly (4), the air outlet end of the blast assembly (4) is connected to the inner ring gas inlet channel and / or the outer ring gas inlet channel, for supplementing primary air to the inner ring gas inlet channel and / or the outer ring gas inlet channel.

12. A burner characterized by, Comprise: A burner head as claimed in any one of claims 1-11; An inner fire cover (5) is arranged on the top of the burner head upper cover (2) and is connected to the inner ring gas outlet (211); An outer fire cover (6) is arranged on the top of the burner head upper cover (2), and is provided with a downwardly open outer ring gas mixing cavity and a fire hole portion, the fire hole portion is connected to a plurality of outer ring gas outlets (212) through the gas mixing cavity; The inlet of the fire hole portion is arranged radially inward of the outlet of the outer ring gas outlet (212), and / or a plurality of air supplement channels (65) are circumferentially spaced apart between the outer fire cover (6) and the burner head upper cover (2).

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