Inner ring fire cover and combustor

Abstract

The utility model discloses an inner ring fire cover and a combustor. The inner ring fire cover comprises a main body; the fire protection structure is connected to the radial side face of the main body and protrudes towards the direction of the central axis of the main body; the fire retaining structure is provided with a fire retaining hole, a buffer hole and an oleophobic hole, the fire retaining hole extends into the fire retaining structure from the surface, far away from the central axis of the main body, of the fire retaining structure, and the oleophobic hole extends into the fire retaining structure from the bottom surface of the fire retaining structure; and the buffer hole extends from the inner surface of the main body into the fire retaining structure and communicates the fire retaining hole with the oleophobic hole. According to the inner ring fire cover, the wall thickness of the inner ring fire cover is effectively increased, a good flame stabilizing effect is achieved, and the stability during combustion is guaranteed.

Description

Technical Field

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

[0002] Compared with the inner ring fire cover of the traditional burner, the inner ring fire cover of the compact anti-dry burn burner is limited by size, so its wall thickness is often thinner. Specifically, the wall thickness of the inner ring fire cover of the traditional burner is about 6 to 8 mm, while the wall thickness of the inner ring fire cover of the compact anti-dry burn burner is about 4 to 5 mm. Precisely because of the thin wall thickness, the fire holes on the inner ring fire cover of the compact anti-dry burner also have a shallower depth accordingly, resulting in poor flame stabilization effect, and especially poor flame stabilization effect at the fire protection point, which may lead to problems such as unstable electromotive force and accidental flameout. Therefore, there is a market demand for inner ring fire covers and burners that can effectively increase the wall thickness, thereby achieving a good flame stabilization effect and ensuring stability during combustion. Utility Model Content

[0003] The technical problem to be solved by the utility model is to effectively increase the wall thickness of the inner ring fire cover, thereby achieving a good flame stabilization effect and ensuring stability during combustion, and to provide an inner ring fire cover and a burner.

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

[0005] An inner ring fire cover, comprising:

[0006] main body;

[0007] A fire protection structure, which is connected to the radial side of the main body and protrudes in the direction of the central axis of the main body; the fire protection structure has a fire protection hole, a buffer hole and an oil-repelling hole, the fire protection hole extends from the surface of the fire protection structure away from the central axis of the main body into the fire protection structure, the oil-repelling hole extends from the bottom surface of the fire protection structure into the fire protection structure, and the buffer hole extends from the inner surface of the main body into the fire protection structure and connects the fire protection hole with the oil-repelling hole.

[0008] In this solution, the fire-preserving structure is connected to the radial side of the main body and protrudes toward the central axis of the main body, so that the position where the fire-preserving structure is provided on the main body is thickened by the thickness of the fire-preserving structure itself, that is, the wall thickness of the inner ring fire cover at this position is effectively increased, and the wall thickness ensures that the fire hole provided on the fire-preserving structure can have a sufficient depth, thereby ensuring the flame stabilization effect. On the basis of the above, the fire-preserving structure has a fire-preserving hole, a buffer hole and an oil-repelling hole. The fire-preserving hole extends from the surface of the fire-preserving structure away from the central axis of the main body into the fire-preserving structure and serves as an outlet for passing the gas-air mixture out of the main body, providing the position where the fire-preserving hole is located with additional fuel required for ensuring combustion; the buffer hole extends from the inner surface of the main body into the fire-preserving structure, and is used to pass the gas-air mixture from the inside of the main body into the fire-preserving structure, and pre-buffers the gas-air mixture and stabilizes its gas pressure before flowing through the fire-preserving hole, thereby ensuring stability during combustion; the oil-repelling hole is used to guide the deposited oil from the bottom surface of the fire-preserving structure, thereby avoiding fire-preserving failure caused by blockage, and further ensuring stability during combustion.

[0009] Preferably, the buffer hole and the fire-preservation hole form an angle with each other; and / or the buffer hole and the oleophobic hole form an angle with each other.

[0010] In this solution, the buffer hole and the fire-preserving hole are at an angle to each other, so that the airflow turns when passing through the angle to provide additional buffering and stabilizing air pressure. The buffer hole and the oil-repelling hole are at an angle to each other, so that the buffer hole and the oil-repelling hole are not interfered with each other, so that the two can independently perform their respective functions, that is, the buffer hole is only used for buffering and the oil-repelling hole is only used for oil-repelling.

[0011] Preferably, the angle between the buffer hole and the fire-preserving hole is between 120 degrees and 150 degrees; and / or the angle between the buffer hole and the oleophobic hole is between 120 degrees and 150 degrees.

[0012] In this solution, the angle between the buffer hole and the fire-preserving hole is between 120 and 150 degrees, thereby achieving a better buffering and stabilizing air pressure effect. The angle between the buffer hole and the oil-repelling hole is between 120 and 150 degrees, thereby enabling the two to independently perform their respective functions more fully.

[0013] Preferably, the aperture of the buffer hole is larger than the aperture of the fire protection hole; and / or the aperture of the oleophobic hole is larger than the aperture of the fire protection hole.

[0014] In this solution, the aperture of the buffer hole is larger than that of the fire-preserving hole, so that the airflow has a pneumatic tendency to flow from the buffer hole to the fire-preserving hole. The aperture of the oil-repelling hole is larger than that of the fire-preserving hole, so that the oil-repelling hole has a large enough aperture to guide the viscous oil and avoid clogging.

[0015] Preferably, the fire protection hole extends perpendicular to the central axis of the main body; and / or the oleophobic hole extends parallel to the central axis of the main body.

[0016] In this solution, the fire protection hole extends perpendicular to the central axis of the main body and the oil-repelling hole extends parallel to the central axis of the main body, thereby maximizing the space utilization of the fire protection hole and the oil-repelling hole in the fire protection structure, that is, the fire protection hole and the oil-repelling hole each have a sufficient depth.

[0017] Preferably, the depth of the fire protection hole is between 2 mm and 4 mm.

[0018] In this solution, the depth of the fire-keeping hole is between 2 mm and 4 mm. The shallow depth of the fire-keeping hole leaves sufficient available space in the fire-keeping structure to increase the depth of the buffer hole and the oleophobic hole, which is conducive to maximizing the total depth of the fire-keeping hole, the buffer hole and the oleophobic hole.

[0019] Preferably, a plurality of flame stabilizing holes are arranged on the radial side of the inner ring fire cover around the central axis of the main body, and the flame stabilizing holes connect the inside of the main body with the outside of the main body, wherein at least two of the plurality of flame stabilizing holes are evenly distributed at the entrance where the fire protection hole extends into the fire protection structure.

[0020] In this solution, at least two flame stabilizing holes evenly distributed at the entrance of the fire protection hole extending into the fire protection structure are used to spray out the gas-air mixture, thereby additionally adding fuel to the fire protection hole. This makes it less likely for the flame on the fire protection hole to separate when it is working, thereby improving the stability of the inner ring fire cover.

[0021] Preferably, two circles of flame stabilizing holes are arranged on the radial side of the main body, one circle of flame stabilizing holes is located above the fire protection hole and the other circle of flame stabilizing holes is located below the fire protection hole, wherein at least four flame stabilizing holes are evenly distributed at the entrance where the fire protection hole extends into the fire protection structure.

[0022] In this solution, four flame stabilizing holes are evenly distributed at the entrance where the fire protection hole extends into the fire protection structure, so that fuel is replenished to the fire protection hole in all directions, further improving the stability of the inner ring fire cover.

[0023] Preferably, the radial side surface of the main body is recessed inwardly to form at least one circle of flame stabilizing grooves, and at least one circle of flame stabilizing holes is evenly arranged in the flame stabilizing grooves.

[0024] In this solution, the gas-air mixture ejected from the flame stabilizing holes is further mixed with the air in the flame stabilizing grooves, thereby obtaining more oxygen for combustion, which is beneficial to full and stable combustion.

[0025] A burner comprises the above-mentioned inner ring fire cover, a fire protection structure is arranged toward the thermocouple of the burner, and an air flow channel is separated from the fire protection structure and the middle base of the burner.

[0026] In this solution, the fire-preserving structure on the inner ring fire cover is arranged toward the thermocouple of the burner to ensure the stability of the thermocouple during combustion. The fire-preserving structure and the middle base of the inner ring fire cover form a narrow airflow channel, which appropriately reduces the amount of gas-air mixture passing into the buffer hole, making the gas pressure more stable and the combustion more complete, achieving a good flame stabilization effect.

[0027] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the utility model.

[0028] The positive progressive effect of the utility model is that the inner ring fire cover in the utility model effectively increases the wall thickness of the inner ring fire cover, thereby achieving a good flame stabilization effect and ensuring stability during combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional diagram of an inner ring fire cover according to an embodiment of the utility model;

[0030] Figure 2 A side view of an inner ring fire cover according to an embodiment of the utility model;

[0031] Figure 3 A cross-sectional view of an inner ring fire cover according to an embodiment of the utility model;

[0032] Figure 4 A sectional perspective view of an inner ring fire cover according to an embodiment of the present utility model;

[0033] Figure 5 A three-dimensional diagram of a burner according to an embodiment of the present invention (I);

[0034] Figure 6 A three-dimensional diagram (2) of a burner according to an embodiment of the present utility model, wherein the outer ring fire cover is omitted;

[0035] Figure 7 This is a cross-sectional view of a burner according to an embodiment of the present invention, in which the outer ring fire cover is omitted.

[0036] Description of reference numerals:

[0037] Inner ring fire cover 100

[0038] Body 10

[0039] Fireproof structure 20

[0040] Fire hole 201

[0041] Buffer hole 202

[0042] Oleophobic hole 203

[0043] Flame stabilizing hole 30

[0044] Flame stabilization tank 40

[0045] Burner 1000

[0046] Thermocouple 1001

[0047] Intermediate base 1002

[0048] Airflow channel 1003 DETAILED DESCRIPTION

[0049] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0050] like Figure 1-4 As shown, this embodiment provides an inner ring fire cover 100 , which includes a main body 10 and a fire protection structure 20 .

[0051] The fire protection structure 20 is connected to the radial side of the main body 10 and protrudes in the direction of the central axis of the main body 10. The fire protection structure 20 has a fire protection hole 201, a buffer hole 202 and an oil-repelling hole 203. The fire protection hole 201 extends from the surface of the fire protection structure 20 away from the central axis of the main body 10 into the fire protection structure 20, the oil-repelling hole 203 extends from the bottom surface of the fire protection structure 20 into the fire protection structure 20, and the buffer hole 202 extends from the inner surface of the main body 10 into the fire protection structure 20 and connects the fire protection hole 201 with the oil-repelling hole 203.

[0052] In a specific implementation, the fire protection structure 20 is connected to the radial side of the main body 10 and protrudes in the direction of the central axis of the main body 10, so that the position where the fire protection structure 20 is provided on the main body 10 is thickened by the thickness of the fire protection structure 20 itself, that is, the wall thickness of the inner ring fire cover 100 at this position is effectively increased. The wall thickness ensures that the fire holes provided on the fire protection structure 20 can have a sufficient depth, thereby ensuring the flame stabilization effect. On the basis of the above, the fire protection structure 20 has a fire protection hole 201, a buffer hole 202 and an oil-repelling hole 203. The fire protection hole 201 extends from the surface of the fire protection structure 20 away from the central axis of the main body 10 into the fire protection structure 20 and serves as an outlet for the gas-air mixture to pass out of the main body 10, providing the location where the fire protection hole 201 is located with additional fuel required to ensure combustion; the buffer hole 202 extends from the inner surface of the main body 10 into the fire protection structure 20, and is used to pass the gas-air mixture from the inside of the main body 10 into the fire protection structure 20, and pre-buffer the gas-air mixture and stabilize its gas pressure before flowing through the fire protection hole 201, thereby ensuring stability during combustion; the oil-repelling hole 203 is used to guide the deposited oil from the bottom surface of the fire protection structure 20, thereby avoiding fire protection failure caused by blockage, and further ensuring stability during combustion. In addition, in actual application, those skilled in the art may also regard the fire-preserving structure 20 and the fire-preserving holes 201, buffer holes 202 and oil-repelling holes 203 arranged inside the fire-preserving structure 20 as a fire-preserving structure 20 unit, and arrange multiple fire-preserving structure 20 units on the inner ring fire cover 100, so as to play a corresponding role in ensuring the flame stabilization effect and ensuring the stability during combustion at more positions of the inner ring fire cover 100, and this is not limited in this embodiment. The fire-preserving structure 20 provided in this embodiment is a simplest setting unit, and those skilled in the art should also be able to think of using any number of fire-preserving holes 201, buffer holes 202 or oil-repelling holes 203 to communicate with each other when necessary, such as using a setting in which one fire-preserving hole 201 is connected to two buffer holes 202 and three oil-repelling holes 203, and this embodiment is not limited in this without violating the basic working principle of the utility model. On the other hand, the fire-preserving hole 201, the buffer hole 202 and the oil-repelling hole 203 in this embodiment all adopt the most basic flow channel shape, that is, a circular flow channel setting mode. However, in actual application, those skilled in the art should also be able to think of adopting other conventional flow channel shapes, such as an elliptical flow channel shape or a square flow channel shape. Those skilled in the art should also be able to think of making further adjustments to the inner surfaces of the fire-preserving hole 201, the buffer hole 202 and the oil-repelling hole 203 according to actual needs using conventional technical means in the prior art, such as setting a guide surface on the surface to guide the airflow, or adding convex points on the surface to cause vortexes and further mix the gas-air mixture. Without violating the basic working principle of the utility model, this embodiment does not limit this.

[0053] like Figure 3 and 4 As shown, the buffer hole 202 and the fire protection hole 201 form an angle with each other; and the buffer hole 202 and the oil-repelling hole 203 form an angle with each other.

[0054] In a specific implementation, the buffer hole 202 and the fire-preserving hole 201 are at an angle to each other, thereby providing additional buffering and stabilizing air pressure through the turning of the airflow when it flows through the angle. The buffer hole 202 and the oil-repelling hole 203 are at an angle to each other, thereby avoiding interference between the buffer hole 202 and the oil-repelling hole 203, so that the two can independently perform their respective functions, that is, the buffer hole 202 is only used for buffering and the oil-repelling hole 203 is only used for oil-repelling. As an alternative embodiment, those skilled in the art may also adopt only the setting method in which the buffer hole 202 and the fire-preserving hole 201 are at an angle to each other or only the buffer hole 202 and the oil-repelling hole 203 are at an angle to each other according to actual needs in processing costs or other aspects, and this embodiment does not limit this.

[0055] like Figure 3 and 4 As shown, the included angle between the buffer hole 202 and the fire protection hole 201 is between 120 degrees and 150 degrees, and the included angle between the buffer hole 202 and the oil-repellent hole 203 is between 120 degrees and 150 degrees.

[0056] In a specific implementation, the angle between the buffer hole 202 and the fire-preserving hole 201 is between 120 and 150 degrees, thereby achieving a better buffering and stabilizing air pressure effect. The angle between the buffer hole 202 and the oil-repelling hole 203 is between 120 and 150 degrees, thereby enabling the two to independently perform their respective functions more fully. As an alternative embodiment, those skilled in the art may also only adopt the setting mode of the angle between the buffer hole 202 and the fire-preserving hole 201 being between 120 and 150 degrees or only adopting the setting mode of the angle between the buffer hole 202 and the oil-repelling hole 203 being between 120 and 150 degrees according to the actual needs of processing cost or other aspects, and this embodiment does not limit this.

[0057] like Figure 3 and 4 As shown, the aperture of the buffer hole 202 is larger than the aperture of the fire protection hole 201 , and the aperture of the oleophobic hole 203 is larger than the aperture of the fire protection hole 201 .

[0058] In a specific implementation, the aperture of the buffer hole 202 is larger than the aperture of the fire-preserving hole 201, so that the airflow has an aerodynamic tendency to flow from the buffer hole 202 to the fire-preserving hole 201. The aperture of the oleophobic hole 203 is larger than the aperture of the fire-preserving hole 201, thereby ensuring that the oleophobic hole 203 has a large enough aperture to guide the viscous oil and avoid clogging. As an alternative embodiment, those skilled in the art may also adopt only the aperture of the buffer hole 202 larger than the aperture of the fire-preserving hole 201 or only the aperture of the oleophobic hole 203 larger than the aperture of the fire-preserving hole 201 according to the actual needs of processing cost or other aspects, and this embodiment does not limit this.

[0059] like Figure 3 and 4 As shown, the fire protection hole 201 extends perpendicular to the central axis of the main body 10 , and the oil-repelling hole 203 extends parallel to the central axis of the main body 10 .

[0060] In a specific implementation, the fire protection hole 201 extends perpendicular to the central axis of the main body 10 and the oil-repelling hole 203 extends parallel to the central axis of the main body 10, so that the space utilization of the fire protection hole 201 and the oil-repelling hole 203 in the fire protection structure 20 is maximized, that is, the fire protection hole 201 and the oil-repelling hole 203 each have a sufficient depth. As an alternative embodiment, those skilled in the art may also adopt only the arrangement of the fire protection hole 201 extending perpendicular to the central axis of the main body 10 or the oil-repelling hole 203 extending parallel to the central axis of the main body 10 according to the actual needs of processing cost or other aspects, and this embodiment does not limit this.

[0061] like Figure 3 and 4 As shown, the depth of the fire protection hole 201 is between 2 mm and 4 mm.

[0062] In a specific implementation, the depth of the fire protection hole 201 is between 2 mm and 4 mm. The shallower depth of the fire protection hole 201 leaves sufficient available space in the fire protection structure 20 to increase the depth of the buffer hole 202 and the oleophobic hole 203, which is beneficial to maximizing the total depth of the fire protection hole 201, the buffer hole 202 and the oleophobic hole 203.

[0063] like Figure 1 and 2 As shown, a plurality of flame stabilizing holes 30 are arranged on the radial side of the inner ring fire cover 100 around the central axis of the main body 10, and the flame stabilizing holes 30 connect the inside of the main body 10 with the outside of the main body 10, wherein at least two of the plurality of flame stabilizing holes 30 are evenly distributed at the entrance where the fire protection hole 201 extends into the fire protection structure 20.

[0064] In a specific implementation, two flame stabilizing holes 30 evenly distributed at the entrance where the fire-keeping hole 201 extends into the fire-keeping structure 20 are used to eject the gas-air mixture, which additionally supplements the fuel for the fire-keeping hole 201, so that the flame on the fire-keeping hole 201 is not easy to separate when it is working, thereby improving the stability of the inner ring fire cover 100. In addition, in a specific implementation, those skilled in the art may also adopt a setting method in which three or more flame stabilizing holes 30 are evenly distributed at the entrance where the fire-keeping hole 201 extends into the fire-keeping structure 20. In the aforementioned case, those skilled in the art may choose to evenly set the remaining flame stabilizing holes 30 above or below the fire-keeping hole 201 on the basis of evenly setting the flame stabilizing holes 30 on both sides of the fire-keeping hole 201, and this embodiment does not limit this.

[0065] like Figure 1 and 2 As shown, two circles of flame stabilizing holes 30 are arranged on the radial side of the main body 10, one circle of flame stabilizing holes 30 is located above the fire protection hole 201 and the other circle of flame stabilizing holes 30 is located below the fire protection hole 201, and four flame stabilizing holes 30 are evenly distributed at the entrance where the fire protection hole 201 extends into the fire protection structure 20.

[0066] In a specific implementation, four flame stabilizing holes 30 are evenly distributed at the entrance where the fire-keeping hole 201 extends into the fire-keeping structure 20, so as to replenish fuel for the fire-keeping hole 201 in an all-round manner, further improving the stability of the inner ring fire cover 100. In addition, in a specific implementation, those skilled in the art may also adopt a setting method in which five or more flame stabilizing holes 30 are evenly distributed at the entrance where the fire-keeping hole 201 extends into the fire-keeping structure 20. In the aforementioned case, those skilled in the art may choose to evenly set the remaining flame stabilizing holes 30 above or below the fire-keeping hole 201 on the basis of evenly setting the flame stabilizing holes 30 on both sides of the fire-keeping hole 201, and this embodiment does not limit this.

[0067] like Figure 1 and 2 As shown, the radial side surface of the main body 10 is recessed inward to form a circle of flame stabilizing grooves 40 , and a circle of flame stabilizing holes 30 are evenly arranged in the flame stabilizing grooves 40 .

[0068] In a specific implementation, the gas-air mixture ejected from the flame stabilizing holes 30 is further mixed with the air at the flame stabilizing grooves 40, thereby obtaining more oxygen for combustion, which is conducive to sufficient and stable combustion. As an alternative implementation, those skilled in the art may also set more than one circle of flame stabilizing grooves 40 on the main body 10 according to actual needs, such as two or three circles of flame stabilizing grooves 40, which is not limited in this embodiment.

[0069] like Figure 5-7As shown, this embodiment also provides a burner 1000 , which includes the above-mentioned inner ring fire cover 100 , a fire protection structure 20 is arranged toward the thermocouple 1001 of the burner 1000 , and an air flow channel 1003 is separated from the fire protection structure 20 and the middle base 1002 of the burner 1000 .

[0070] In specific implementation, the fire-preserving structure 20 on the inner ring fire cover 100 is arranged toward the thermocouple 1001 of the burner 1000 to ensure the stability of the combustion at the thermocouple 1001. The fire-preserving structure 20 and the middle base 1002 of the inner ring fire cover 100 form a narrow airflow channel 1003, which appropriately reduces the amount of the gas-air mixture passing into the buffer hole 202, so that the gas pressure is more stable and the combustion is more complete, and a good flame stabilization effect is achieved. The setting method adopted in this embodiment is to use a setting method in which one fire-preserving structure 20 corresponds to one thermocouple 1001, but those skilled in the art can use multiple fire-preserving structures 20 corresponding to one thermocouple 1001 according to actual needs. In addition, those skilled in the art can use a number of fire-preserving structures 20 corresponding to the number of thermocouples 1001 according to actual needs, and make the fire-preserving structures 20 correspond to the thermocouples 1001 one by one, and this embodiment does not limit this.

[0071] 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: include: main body; A fire protection structure, wherein the fire protection structure is connected to the radial side surface of the main body and protrudes toward the direction of the central axis of the main body; the fire protection structure has a fire protection hole, a buffer hole and an oil-repelling hole, the fire protection hole extends from the surface of the fire protection structure away from the central axis of the main body into the fire protection structure, the oil-repelling hole extends from the bottom surface of the fire protection structure into the fire protection structure, and the buffer hole extends from the inner surface of the main body into the fire protection structure and connects the fire protection hole with the oil-repelling hole.

2. The inner ring fire cover according to claim 1, characterized in that: The buffer hole and the fire-preserving hole form an angle with each other; and / or the buffer hole and the oil-repelling hole form an angle with each other.

3. The inner ring fire cover according to claim 2, characterized in that: The included angle between the buffer hole and the fire-preserving hole is between 120 degrees and 150 degrees; and / or the included angle between the buffer hole and the oleophobic hole is between 120 degrees and 150 degrees.

4. The inner ring fire cover according to claim 1, characterized in that: The aperture of the buffer hole is larger than the aperture of the fire protection hole; and / or the aperture of the oleophobic hole is larger than the aperture of the fire protection hole.

5. The inner ring fire cover according to claim 1, characterized in that: The fire protection hole extends perpendicularly to the central axis of the main body; and / or the oleophobic hole extends parallel to the central axis of the main body.

6. The inner ring fire cover according to claim 1, characterized in that: The depth of the fire protection hole is between 2 mm and 4 mm.

7. The inner ring fire cover according to any one of claims 1 to 6, characterized in that: A plurality of flame stabilizing holes are arranged on the radial side of the inner ring fire cover around the central axis of the main body, and the flame stabilizing holes connect the interior of the main body with the exterior of the main body, wherein at least two of the plurality of flame stabilizing holes are evenly distributed at the entrance where the fire protection hole extends into the fire protection structure.

8. The inner ring fire cover according to claim 7, characterized in that: Two circles of the flame stabilizing holes are arranged on the radial side of the main body, one circle of the flame stabilizing holes is located above the fire preservation holes and the other circle of the flame stabilizing holes is located below the fire preservation holes, wherein at least four of the flame stabilizing holes are evenly distributed at the entrance where the fire preservation holes extend into the fire preservation structure.

9. The inner ring fire cover according to claim 7, characterized in that: The radial side surface of the main body is recessed inward to form at least one circle of flame stabilizing grooves, and at least one circle of flame stabilizing holes is evenly arranged in the flame stabilizing grooves.

10. A burner, characterized in that: It comprises the inner ring fire cover as described in any one of claims 1 to 9, wherein the fire protection structure is arranged toward the thermocouple of the burner, and an air flow channel is separated from the middle base of the burner by the fire protection structure.

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