Inner ring fire cover and combustor

Abstract

The utility model provides an inner ring fire cover and a combustor, and relates to the technical field of cooking utensils. The inner ring fire cover comprises an upper fire cover and a lower fire cover, the bottom of the upper fire cover is provided with a plurality of concave grooves, the upper fire cover detachably covers the lower fire cover, so that a central cavity is formed between the upper fire cover and the lower fire cover, groove fire holes are formed through the grooves, and the central cavity is communicated with the outside through the groove fire holes. Limiting ribs are arranged at the top of the lower burner cap, limiting grooves matched with the limiting ribs are formed in the bottom of the upper burner cap, the limiting ribs are inserted into the limiting grooves to limit radial displacement of the upper burner cap and the lower burner cap, part of the limiting ribs are inserted into the groove fire holes, the limiting ribs play a role in slowing down and reducing the speed of fuel gas flowing through the groove fire holes, and therefore the flame leaving problem is solved. And the limiting ribs can also prevent overflowing liquid from entering the combustor through the fire holes, the situation that the overflowing liquid affects the combustion performance of the inner ring fire cover is avoided, the groove fire holes are prevented from being polluted, and the inner ring fire cover can be kept clean better.

Description

Technical Field

[0001] The utility model relates to the technical field of stoves, in particular to an inner ring fire cover and a burner. Background Art

[0002] The split slot-type fire hole fire cover currently on the market has poor flame stability, especially under cold and high-pressure conditions, it is very easy to flame out. The upper fire cover is covered with the lower fire cover to form a slot fire hole. The upper fire cover is a thin plate, the upper fire cover is light, easy to lose and easy to be burned and deformed. The upper fire cover and the lower fire cover are easy to deviate in the radial direction. The deviation causes the depth of the slot fire hole in some areas to become shorter, resulting in fire leakage or flame out. The slot fire hole is set obliquely upward, has poor flame stability, and is easy to flame out. In addition, there is no shielding above the fire hole, and overflow can easily enter the interior of the burner through the fire hole. The fire hole is easily blocked and contaminated, affecting the combustion effect of the inner ring fire cover and inconvenient to clean. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects in the prior art that the inner ring fire cover has poor flame stability, the upper fire cover is light in weight and easy to be lost and deformed by burning, the upper fire cover and the lower fire cover are easy to deviate in the radial direction to cause fire leakage or flame separation, and the overflow liquid is easy to enter the interior of the burner through the fire hole, and an inner ring fire cover and a burner are provided.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The utility model provides an inner ring fire cover, the inner ring fire cover comprises an upper fire cover and a lower fire cover, the bottom of the upper fire cover has a plurality of inwardly concave grooves, the upper fire cover can be detachably covered on the lower fire cover, so that a central cavity is formed between the upper fire cover and the lower fire cover, and a slot fire hole is formed through the groove, and the slot fire hole communicates the central cavity with the outside;

[0006] The top of the lower fire cover is provided with a limiting rib, and the bottom of the upper fire cover is provided with a limiting groove matching the limiting rib. The limiting rib is inserted into the limiting groove to limit the radial displacement of the upper fire cover and the lower fire cover, and part of the limiting rib is inserted into the slot fire hole.

[0007] In this scheme, the inner ring fire cover forms a groove for forming a slot fire hole on the upper fire cover, so that the weight of the upper fire cover is greater. Relying on the gravity of the upper fire cover, the upper fire cover and the lower fire cover are better sealed, and the upper fire cover and the lower fire cover are not easy to shift, and the upper fire cover is not easy to lose and is not easy to be burned and deformed. The upper fire cover and the lower fire cover are detachable, which is convenient for disassembly and assembly, and the slot fire hole is easy to clean. A limiting groove is provided on the top of the lower fire cover, and a limiting rib is provided on the bottom of the upper fire cover. The limiting rib is inserted into the limiting groove to limit the radial displacement of the upper fire cover and the lower fire cover, so as to avoid radial deviation causing leakage or flame separation. Part of the limiting rib is inserted into the slot fire hole, and the limiting rib plays a role in slowing down the gas flowing through the slot fire hole, thereby improving the flame separation problem and making the flame stabilization performance of the inner ring fire cover better. The limiting rib can also prevent the overflow from entering the burner through the fire hole, so as to avoid the overflow from affecting the combustion performance of the inner ring fire cover, and also avoid the slot fire hole from being contaminated, which is more conducive to keeping the inner ring fire cover clean.

[0008] Preferably, the limiting ribs are arranged around the circumference of the lower fire cover, and parts of the limiting ribs are inserted into the plurality of slot fire holes.

[0009] In this solution, the limiting ribs are arranged around the circumference of the lower fire cover, so that the upper fire cover and the lower fire cover can be radially limited from multiple circumferential directions, making the radial limitation of the upper fire cover and the lower fire cover more stable and more effectively avoiding the phenomenon of fire leakage or flame separation. Part of the limiting ribs are inserted into multiple slot fire holes, so that the gas in the multiple slot fire holes can be slowed down and the speed can be reduced, thereby improving the flame separation problem of the multiple slot fire holes, making the flame stabilization performance of the inner ring fire cover better, and more comprehensively blocking the overflow from entering the interior of the burner through the slot fire holes, avoiding the contamination of the slot fire holes, and being more conducive to keeping the inner ring fire cover clean.

[0010] Preferably, the plurality of slotted fire holes include a plurality of first slotted fire holes and a plurality of second slotted fire holes, the cross-sectional area of ​​the first slotted fire holes is greater than the cross-sectional area of ​​the second slotted fire holes, and the plurality of first slotted fire holes and the plurality of second slotted fire holes are cross-spaced and arranged along the circumference of the inner ring fire cover.

[0011] In this solution, the inner ring fire cover is provided with two types of slot fire holes, namely the first slot fire hole and the second slot fire hole. The two slot fire holes have different cross-sectional areas and are arranged at cross-intervals, so that the load of the slot fire holes is reasonable, the gas burns more completely, the smoke generated by the gas combustion is reduced, and the overall combustion efficiency of the inner ring fire cover is improved.

[0012] Preferably, the lower fire cover is provided with a plurality of lower flame stabilizing grooves at intervals along the circumference of the lower fire cover, the lower flame stabilizing grooves are provided below the slot fire holes and are connected with the slot fire holes, and the width of the lower flame stabilizing grooves is greater than the width of the slot fire holes.

[0013] In this solution, the lower flame stabilizing groove is arranged below the slot fire hole and is connected to the slot fire hole. After the gas passing through the slot fire hole is blocked and slowed down by the limiting ribs, since the width of the lower flame stabilizing groove is greater than the width of the slot fire hole, the gas will be diverted to the left and right of the lower flame stabilizing groove with a smaller cross-sectional area. The gas flow rate in the lower flame stabilizing groove is small, and the flame is small, so that the flame at the root of the slot fire hole can be pulled, and the flame stabilizing performance of the inner ring fire cover can be further improved. The lower flame stabilizing groove is arranged on the lower fire cover, thereby avoiding the structural strength of the upper fire cover being weakened by being arranged on the upper fire cover, and is convenient for manufacturing and processing, and the service life of the inner ring fire cover is improved. The lower flame stabilizing groove is arranged on the lower fire cover instead of the upper fire cover, which is also convenient for cleaning the lower flame stabilizing groove after disassembly.

[0014] Preferably, the slot fire hole is sequentially provided with a first hole segment and a second hole segment along the radial inner side of the inner ring fire cover to the radial outer side of the inner ring fire cover, the first hole segment and the second hole segment form a bend, and part of the limiting rib is inserted into the second hole segment.

[0015] In this scheme, the first hole segment and the second hole segment are bent, thereby increasing the depth of the slot fire hole without changing the inner and outer diameters of the inner ring fire cover, increasing the path of the gas flowing through the slot fire hole, increasing the resistance of the gas flowing out of the slot fire hole, reducing the flow rate of the gas, avoiding flame separation, and further improving the flame stabilization performance of the inner ring fire cover. The first hole segment and the second hole segment are arranged in sequence along the radial outer side of the inner ring fire cover, and the gas flows out of the slot fire hole from the central cavity through the first hole segment first, and then through the second hole segment to burn. Part of the limiting rib is inserted into the second hole segment. Since the second hole segment is closer to the outlet of the slot fire hole, the limiting rib is arranged closer to the outlet of the slot fire hole, so that the gas near the outlet can be slowed down and decelerated, so that the flame stabilization effect is better, the gas burns more fully, and the problem of high smoke is avoided. At the same time, it can better prevent the overflow from the outlet of the slot fire hole from entering the interior of the burner, avoid the contamination of the slot fire hole, and be more conducive to keeping the inner ring fire cover clean.

[0016] Preferably, the first hole segment is arranged obliquely upward along the radial inner side of the inner ring fire cover toward the radial outer side of the inner ring fire cover, and the second hole segment is arranged horizontally.

[0017] In this solution, the first hole section is arranged obliquely upward along the radial inner side of the inner ring fire cover toward the radial outer side of the inner ring fire cover, thereby increasing the depth of the first hole section, playing a flame stabilizing role, and facilitating the introduction of the gas entering the central cavity from below into the first hole section. The second hole section is arranged horizontally, so that the gas flows out of the outlet of the second hole section horizontally, reducing the flow rate of the gas flowing out of the second hole section, and improving the flame stabilizing performance of the inner ring fire cover.

[0018] Preferably, an ignition hole is provided on the upper ignition cover, and the ignition hole connects the central cavity and the outside world. The outer surface of the upper ignition cover is provided with two ignition grooves extending in the vertical direction, and the ignition grooves are located on both sides of the ignition hole, and the ignition grooves are connected to the slot fire hole.

[0019] In this solution, ignition slots connected to the slot fire holes are provided on both sides of the ignition hole, so that the gas from the slot fire holes on both sides can be diverted toward the ignition hole, increasing the gas concentration near the ignition hole and improving the ignition effect of the inner ring fire cover.

[0020] Preferably, the upper fire cover is provided with a plurality of flame stabilizing holes at intervals along the circumference of the upper fire cover, the flame stabilizing holes are provided above the slot fire holes, and the flame stabilizing holes connect the central cavity with the outside.

[0021] In this solution, a plurality of flame stabilizing holes are provided above the slot fire holes, thereby slowing down the flow rate of the fuel gas flowing through the slot fire holes, further playing a flame stabilizing role.

[0022] Preferably, the top of the upper fire cover horizontally extends outward along the circumference of the upper fire cover to form a flange, and the flame stabilizing hole is arranged below the flange;

[0023] And / or, a notch is provided at the bottom of the flange along the circumference of the upper fire cover.

[0024] In this solution, the flange provided above the flame stabilizing hole can block the overflow, prevent the overflow from entering the flame stabilizing hole and the slot fire hole, avoid the flame stabilizing hole and the slot fire hole from being contaminated, and help the inner ring fire cover to keep clean. The flange can press the flame of the flame stabilizing hole downward, further playing a flame stabilizing role. The bottom of the flange is provided with a notch along the circumference of the upper fire cover, so that it is easier for the overflow to drip on the edge of the notch.

[0025] The utility model also provides a burner, which comprises the inner ring fire cover mentioned above.

[0026] In this embodiment, the burner includes the same effect as the inner ring fire cover described above.

[0027] The positive and progressive effects of the utility model are:

[0028] The utility model provides an inner ring fire cover and a burner. The inner ring fire cover sets a groove for forming a slot fire hole on the upper fire cover, so that the weight of the upper fire cover is greater. Relying on the gravity of the upper fire cover, the upper fire cover and the lower fire cover are better sealed, the upper fire cover and the lower fire cover are not easy to shift, the upper fire cover is not easy to be lost and not easy to be burned and deformed. The upper fire cover and the lower fire cover are detachable, convenient for disassembly and assembly, and the slot fire hole is easy to clean. A limiting groove is provided on the top of the lower fire cover, and a limiting rib is provided on the bottom of the upper fire cover. The limiting rib is inserted into the limiting groove to limit the radial displacement of the upper fire cover and the lower fire cover, so as to avoid radial deviation causing leakage or flame separation. Part of the limiting rib is inserted into the slot fire hole, and the limiting rib plays a role of slowing down the flow and reducing the speed of the gas flowing through the slot fire hole, thereby improving the flame separation problem and making the flame stabilization performance of the inner ring fire cover better. The limiting rib can also block the overflow from entering the burner through the fire hole, so as to avoid the overflow from affecting the combustion performance of the inner ring fire cover, and also avoid the slot fire hole from being contaminated, which is more conducive to keeping the inner ring fire cover clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the inner ring fire cover according to an embodiment of the utility model.

[0030] Figure 2 It is a side view of an inner ring fire cover according to an embodiment of the utility model.

[0031] Figure 3 It is a cross-sectional view of an inner ring fire cover according to an embodiment of the utility model.

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the upper fire cover according to an embodiment of the utility model.

[0033] Figure 5 The figure is a bottom view of an upper fire cover according to an embodiment of the utility model.

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of the lower fire cover according to an embodiment of the utility model.

[0035] Figure 7 It is a top view of a lower fire cover according to an embodiment of the utility model.

[0036] Description of reference numerals:

[0037] Inner ring fire cover 100

[0038] Fire cover 200

[0039] Limiting slot 210

[0040] Groove 220

[0041] Slot fire hole 230

[0042] First slot fire hole 231

[0043] Second slot fire hole 232

[0044] First hole section 241

[0045] Second hole section 242

[0046] Ignition hole 250

[0047] Ignition slot 260

[0048] Flame stabilizing hole 270

[0049] Flanging 280

[0050] Notch 281

[0051] Lower fire cover 300

[0052] Limiting rib 310

[0053] Lower flame stabilizing tank 320

[0054] Center cavity 400 DETAILED DESCRIPTION

[0055] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0056] This embodiment provides a burner, which includes an inner ring fire cover 100 .

[0057] like Figure 1-Figure 3 As shown, the inner ring fire cover 100 includes an upper fire cover 200 and a lower fire cover 300. The bottom of the upper fire cover 200 has a plurality of inwardly recessed grooves 220. The upper fire cover 200 can be detachably covered on the lower fire cover 300 to form a central cavity 400 between the upper fire cover 200 and the lower fire cover 300, and slotted fire holes 230 are formed through the grooves 220, and the slotted fire holes 230 connect the central cavity 400 with the outside.

[0058] In this embodiment, the inner ring fire cover 100 sets the groove 220 forming the groove fire hole 230 on the upper fire cover 200, so that the weight of the upper fire cover 200 is greater. Relying on the gravity of the upper fire cover 200, the upper fire cover 200 and the lower fire cover 300 are better matched and sealed, and the upper fire cover 200 and the lower fire cover 300 are not easy to shift, and the upper fire cover 200 is not easy to be lost or deformed by burning. The upper fire cover 200 and the lower fire cover 300 are detachable, convenient for disassembly and assembly, and the groove fire hole 230 is easy to clean.

[0059] like Figure 4-Figure 7As shown, a limiting rib 310 is provided at the top of the lower fire cover 300, and a limiting groove 210 matching the limiting rib 310 is provided at the bottom of the upper fire cover 200. The limiting rib 310 is inserted into the limiting groove 210 to limit the radial displacement of the upper fire cover 200 and the lower fire cover 300 to avoid radial deviation causing fire leakage or flame separation.

[0060] Part of the limiting rib 310 is inserted into the slot fire hole 230. The limiting rib 310 has the effect of slowing down the flow of gas passing through the slot fire hole 230, thereby improving the flame separation problem and making the flame stabilization performance of the inner ring fire cover 100 better. The limiting rib 310 can also block the overflow from entering the burner through the fire hole, thereby preventing the overflow from affecting the combustion performance of the inner ring fire cover 100 and preventing the slot fire hole 230 from being contaminated, which is more conducive to keeping the inner ring fire cover 100 clean.

[0061] like Figure 6 As shown, the limiting ribs 310 are arranged around the circumference of the lower fire cover 300, so that the upper fire cover 200 and the lower fire cover 300 can be radially limited from multiple circumferential directions, making the radial limitation of the upper fire cover 200 and the lower fire cover 300 more stable and more effectively avoiding the phenomenon of fire leakage or flame separation. In this embodiment, the limiting ribs 310 are continuously arranged around the circumference of the lower fire cover 300, so as to facilitate manufacturing and processing. In other embodiments, the number of limiting ribs 310 can also be multiple, and they are arranged around the circumference of the lower fire cover 300 at intervals.

[0062] In this embodiment, part of the limiting rib 310 is inserted into the multiple slotted fire holes 230, so that it can slow down the flow and reduce the speed of the gas in the multiple slotted fire holes 230, thereby improving the flame separation problem of the multiple slotted fire holes 230, making the flame stabilization performance of the inner ring fire cover 100 better, and can also more comprehensively block the overflow from entering the interior of the burner through the slotted fire holes 230, avoiding the slotted fire holes 230 from being contaminated, and is more conducive to keeping the inner ring fire cover 100 clean.

[0063] The multiple slotted fire holes 230 include multiple first slotted fire holes 231 and multiple second slotted fire holes 232. The cross-sectional area of ​​the first slotted fire holes 231 is larger than the cross-sectional area of ​​the second slotted fire holes 232. The multiple first slotted fire holes 231 and the multiple second slotted fire holes 232 are cross-spaced along the circumference of the inner ring fire cover 100.

[0064] like Figure 5 As shown, in this embodiment, the width of the first slotted fire hole 231 is b1, the width of the second slotted fire hole 232 is b2, b1 = b2. In other embodiments, other slotted fire hole 230 widths considered appropriate by those skilled in the art may also be selected.

[0065] In this embodiment, the inner ring fire cover 100 is provided with two types of slot fire holes 230, namely, a first slot fire hole 231 and a second slot fire hole 232. The two types of slot fire holes 230 have different cross-sectional areas and are arranged at cross-intervals, so that the load of the slot fire holes 230 is reasonable, the gas burns more fully, the smoke generated by the gas combustion is reduced, and the overall combustion efficiency of the inner ring fire cover 100 is improved. In other embodiments, one or more slot fire holes 230 with different cross-sectional areas may also be provided, and those skilled in the art may determine the arrangement of the slot fire holes 230 according to actual needs.

[0066] In this embodiment, the lower fire cover 300 is provided with a plurality of lower flame stabilizing grooves 320 at intervals along the circumference of the lower fire cover 300. The lower flame stabilizing grooves 320 are provided below the slot fire hole 230 and communicate with the slot fire hole 230. The width of the lower flame stabilizing grooves 320 is greater than the width of the slot fire hole 230. After the gas passing through the slot fire hole 230 is blocked and slowed down by the limiting ribs 310, since the width of the lower flame stabilizing grooves 320 is greater than the width of the slot fire hole 230, the gas will be diverted to the lower flame stabilizing grooves 320 with a smaller cross-sectional area. The gas flow rate in the lower flame stabilizing grooves 320 is small, and the flame is small, so that the flame at the root of the slot fire hole 230 can be pulled, and the flame stabilizing performance of the inner ring fire cover 100 can be further improved. The lower flame stabilizing grooves 320 are provided in the lower fire cover 300, thereby avoiding the structural strength of the upper fire cover 200 being weakened by being provided in the upper fire cover 200, and are convenient for manufacturing and processing, thereby improving the service life of the inner ring fire cover 100. The lower flame stabilizing groove 320 is arranged on the lower fire cover 300 instead of the upper fire cover 200, which is also convenient for cleaning the lower flame stabilizing groove 320 after disassembly.

[0067] like Figure 1 and Figure 2 As shown, in the present embodiment, the lower flame stabilizing groove 320 is arranged only below the second slot fire hole 232. In other embodiments, the lower flame stabilizing groove 320 may be arranged below both the first slot fire hole 231 and the second slot fire hole 232. Other arrangements of the lower flame stabilizing groove 320 that are deemed appropriate by those skilled in the art may also be selected.

[0068] like Figure 3 As shown, in this embodiment, the height of the lower flame stabilizing groove 320 is h2, where h2=b1 / 3. In other embodiments, other heights of the lower flame stabilizing groove 320 that are deemed appropriate by those skilled in the art may also be selected.

[0069] like Figure 7 As shown, in this embodiment, the width of the lower flame stabilizing groove 320 is b3, 1.5*b1≤b3≤2*b2, and in other embodiments, other widths of the lower flame stabilizing groove 320 that are considered appropriate by those skilled in the art may also be selected. In this embodiment, the lower flame stabilizing grooves 320 are arranged at intervals along the circumference of the lower fire cover 300, and the interval between the lower flame stabilizing grooves 320 is b4. Those skilled in the art may determine the size of b4 according to actual needs.

[0070] like Figure 7 As shown, in this embodiment, the width of the limiting rib 310 is b5, b5=b1 / 2, the distance between the limiting rib 310 and the outer edge of the lower fire cover 300 is b6, 1.5mm≤b6≤2.5mm, b6 needs to be set reasonably, otherwise the gas supply of the lower flame stabilizing groove 320 will be discontinuous and the flame will be unstable. In other embodiments, the width and setting position of the limiting rib 310 that are considered appropriate by other technicians in this field can also be selected.

[0071] like Figure 3 As shown, the slot fire hole 230 is provided with a first hole segment 241 and a second hole segment 242 in sequence from the radial inner side of the inner ring fire cover 100 to the radial outer side of the inner ring fire cover 100, and the first hole segment 241 and the second hole segment 242 are bent, thereby increasing the depth of the slot fire hole 230 without changing the inner and outer diameters of the inner ring fire cover 100, increasing the path of the gas flowing through the slot fire hole 230, increasing the resistance of the gas flowing out of the slot fire hole 230, reducing the flow rate of the gas, avoiding flame separation, and further improving the flame stabilization performance of the inner ring fire cover 100.

[0072] The first hole section 241 and the second hole section 242 are arranged in sequence along the radial outer side of the inner ring fire cover 100. The gas flows from the central cavity 400 through the first hole section 241 first, and then through the second hole section 242 to flow out of the slot fire hole 230 for combustion. Part of the limiting rib 310 is inserted into the second hole section 242. Since the second hole section 242 is closer to the outlet of the slot fire hole 230, the limiting rib 310 is arranged closer to the outlet of the slot fire hole 230, so that the gas near the outlet can be slowed down and the speed can be reduced, so that the flame stabilization effect is better, the gas combustion is more complete, and the problem of high smoke is avoided. At the same time, it can also better block the overflow from the outlet of the slot fire hole 230 from entering the interior of the burner, avoid the slot fire hole 230 from being contaminated, and is more conducive to keeping the inner ring fire cover 100 clean.

[0073] In this embodiment, the first hole section 241 is arranged obliquely upward along the radial inner side of the inner ring fire cover 100 toward the radial outer side of the inner ring fire cover 100, thereby increasing the depth of the first hole section 241, playing a flame stabilizing role, and facilitating the introduction of the gas entering the central cavity 400 from below into the first hole section 241. The second hole section 242 is arranged horizontally, so that the gas flows out of the outlet of the second hole section 242 horizontally, reducing the flow rate of the gas flowing out of the second hole section 242, and improving the flame stabilizing performance of the inner ring fire cover 100.

[0074] like Figure 3 As shown, in this embodiment, the length of the first hole segment 241 is L2, the length of the second hole segment 242 is L1, and L1 / L2=1 / 3. In other embodiments, other length ratios of the first hole segment 241 and the second hole segment 242 that are considered appropriate by those skilled in the art may also be selected.

[0075] In this embodiment, the cross-sectional height of the first hole section 241 of the first slotted fire hole 231 is B1, the cross-sectional height of the second hole section 242 of the first slotted fire hole 231 is B2, B1=B2, the cross-sectional height of the first hole section 241 of the second slotted fire hole 232 is B3, the cross-sectional height of the second hole section 242 of the second slotted fire hole 232 is B4, B3=B4, thereby increasing the flow path length without changing the cross-sectional area of ​​the slotted fire hole 230, changing the gas outlet direction, and playing a slow flow role. In other embodiments, other configuration methods of the cross-sectional area of ​​the slotted fire hole 232 that are considered appropriate by those skilled in the art may also be selected.

[0076] In this embodiment, the inclination angles of the second hole segments 242 of the first slotted fire hole 231 and the second slotted fire hole 232 are both θ. In other embodiments, the inclination angles of the second hole segments 242 of the first slotted fire hole 231 and the second slotted fire hole 232 may also be different.

[0077] like Figure 1 and Figure 2 As shown, an ignition hole 250 is provided on the upper ignition cover 200, and the ignition hole 250 connects the central cavity 400 and the outside, and two ignition grooves 260 extending in the vertical direction are provided on the outer surface of the upper ignition cover 200, and the ignition grooves 260 are located on both sides of the ignition hole 250, and the ignition grooves 260 connect the slot ignition hole 230. In this embodiment, ignition grooves 260 connecting the slot ignition hole 230 are provided on both sides of the ignition hole 250, so that the gas of the slot ignition holes 230 on both sides can be diverted to the direction of the ignition hole 250, so that the gas concentration near the ignition hole 250 is increased, and the ignition effect of the inner ring ignition cover 100 is improved.

[0078] like Figure 1-Figure 3 As shown, the upper fire cover 200 is provided with a plurality of flame stabilizing holes 270 at intervals along the circumference of the upper fire cover 200. The flame stabilizing holes 270 are provided above the slot fire holes 230, and the flame stabilizing holes 270 communicate with the central cavity 400 and the outside. By providing the flame stabilizing holes 270 above the slot fire holes 230, the flow rate of the gas flowing through the slot fire holes 230 can be slowed down, thereby further playing a flame stabilizing role.

[0079] In this embodiment, flame stabilizing holes 270 are provided above both the first slotted fire hole 231 and the second slotted fire hole 232. In other embodiments, flame stabilizing holes 270 may be provided only above the first slotted fire hole 231 or the second slotted fire hole 232, or other arrangements of flame stabilizing holes 270 deemed appropriate by those skilled in the art may be selected.

[0080] like Figure 3As shown, in this embodiment, the diameter of the flame stabilizing hole 270 is d, the width of the first slotted flame hole 231 is b1, and the width of the second slotted flame hole 232 is b2, d = b1 = b2. In other embodiments, other diameters of the flame stabilizing hole 270 that are considered appropriate by those skilled in the art may also be selected.

[0081] The height of the axis of the flame stabilizing hole 270 from the upper edge of the slotted flame hole 230 is h1. In this embodiment, d1≤h1≤L2 / 2. In other embodiments, other positions of the flame stabilizing hole 270 considered appropriate by those skilled in the art may also be selected.

[0082] The top of the upper fire cover 200 extends horizontally outward along the circumference of the upper fire cover 200 to form a flange 280, and the flame stabilizing hole 270 is arranged below the flange 280. In this embodiment, the flange 280 arranged above the flame stabilizing hole 270 can block the overflow, prevent the overflow from entering the flame stabilizing hole 270 and the slot fire hole 230, avoid the flame stabilizing hole 270 and the slot fire hole 230 from being contaminated, and is more conducive to keeping the inner ring fire cover 100 clean. The flange 280 can press the flame of the flame stabilizing hole 270 downward, further playing a flame stabilizing role. The bottom of the flange 280 is provided with a notch 281 along the circumference of the upper fire cover 200, so that it is easier for the overflow to drip on the edge of the notch 281.

[0083] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship of the device or component in normal use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation at any time, and therefore cannot be understood as a limitation on the present invention in this regard.

[0084] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. An inner ring fire cover, characterized in that: The inner ring fire cover comprises an upper fire cover and a lower fire cover, the bottom of the upper fire cover has a plurality of inwardly concave grooves, the upper fire cover can be detachably covered on the lower fire cover, so that a central cavity is formed between the upper fire cover and the lower fire cover, and a slot fire hole is formed through the groove, and the slot fire hole communicates the central cavity with the outside; The top of the lower fire cover is provided with a limiting rib, and the bottom of the upper fire cover is provided with a limiting groove matching the limiting rib. The limiting rib is inserted into the limiting groove to limit the radial displacement of the upper fire cover and the lower fire cover, and part of the limiting rib is inserted into the slot fire hole.

2. The inner ring fire cover according to claim 1, characterized in that: The limiting ribs are arranged around the circumference of the lower fire cover, and parts of the limiting ribs are inserted into the plurality of slot fire holes.

3. The inner ring fire cover according to claim 1, characterized in that: The plurality of slot fire holes include a plurality of first slot fire holes and a plurality of second slot fire holes, the cross-sectional area of ​​the first slot fire holes is greater than the cross-sectional area of ​​the second slot fire holes, and the plurality of first slot fire holes and the plurality of second slot fire holes are cross-spaced and arranged along the circumference of the inner ring fire cover.

4. The inner ring fire cover according to claim 1, characterized in that: The lower fire cover is provided with a plurality of lower flame stabilizing grooves at intervals along the circumference of the lower fire cover, the lower flame stabilizing grooves are provided below the slot fire holes and are connected with the slot fire holes, and the width of the lower flame stabilizing grooves is greater than the width of the slot fire holes.

5. The inner ring fire cover according to claim 1, characterized in that: The slot fire hole is provided with a first hole segment and a second hole segment in sequence along the radial inner side of the inner ring fire cover to the radial outer side of the inner ring fire cover, the first hole segment and the second hole segment form a bend, and part of the limiting rib is inserted into the second hole segment.

6. The inner ring fire cover according to claim 5, characterized in that: The first hole segment is arranged obliquely upward along the radial inner side of the inner ring fire cover toward the radial outer side of the inner ring fire cover, and the second hole segment is arranged horizontally.

7. The inner ring fire cover according to claim 1, characterized in that: The upper ignition cover is provided with an ignition hole, the ignition hole connects the central cavity and the outside, the outer surface of the upper ignition cover is provided with two ignition grooves extending in the vertical direction, the ignition grooves are located on both sides of the ignition hole, and the ignition grooves connect the slot ignition hole.

8. The inner ring fire cover according to claim 1, characterized in that: The upper fire cover is provided with a plurality of flame stabilizing holes at intervals along the circumference of the upper fire cover, the flame stabilizing holes are arranged above the slot fire holes, and the flame stabilizing holes communicate with the central cavity and the outside.

9. The inner ring fire cover according to claim 8, characterized in that: The top of the upper fire cover horizontally extends outward along the circumference of the upper fire cover to form a flange, and the flame stabilizing hole is arranged below the flange; And / or, a notch is provided at the bottom of the flange along the circumference of the upper fire cover.

10. A burner, characterized in that: It comprises an inner ring fire cover as described in any one of claims 1-9.

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