Combustor fire hole plate, combustor and gas equipment

Abstract

The utility model belongs to the technical field of fuel gas equipment, and discloses a burner fire hole plate, a burner and fuel gas equipment, the cross section area of a secondary fire hole is gradually increased from the gas inlet end to the gas outlet end of the secondary fire hole, airflow forms vortex in the secondary fire hole when flowing into the secondary fire hole with the larger hole diameter from a main fire hole, and therefore the secondary fire hole is formed. And the effect of improving flame stability is achieved. After airflow enters the secondary fire holes with the increased hole diameters, the flow speed is reduced, flames formed at the air outlet ends of the first fire holes and flames formed at the air outlet ends of the second fire holes are different in height, the first fire holes and the second fire holes are alternately arranged in the length direction and the width direction of the fire hole plate body, and the multiple first fire holes can be formed around the second fire holes; a plurality of second fire holes are formed around the first fire holes, so that when the burner works under the working condition of large load, flames with low height can ignite surrounding fuel gas, the phenomenon of flame separation of flames with high height is avoided, the flame stability is improved, and the burning noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas equipment, in particular to a burner fire hole plate, a burner and gas equipment. Background Art

[0002] The burner's fire hole plate is provided with multiple triangular fire hole areas, each fire hole area is arranged with multiple fire holes, and a protective belt is provided between two adjacent fire hole areas, which can not only enhance the stability of flame combustion, but also enable the flames generated by each fire hole area to maintain an independent shape, increase the flame area, and thus output a larger heat load when the combustion area remains unchanged.

[0003] The multiple fire holes on the aforementioned fire hole plate are all cylindrical holes with the same aperture. Therefore, the air outlet velocity of each fire hole is the same, and the greater the load, the greater the airflow velocity. This arrangement results in a high airflow velocity through the fire holes under high load, and the flame may break away from the fire hole plate, which is called flame lift, resulting in poor combustion stability and increased noise. Utility Model Content

[0004] One of the technical problems solved by the utility model is to provide a burner fire hole plate that can improve the flame stabilization effect and reduce noise.

[0005] The second technical problem solved by the present invention is to provide a burner that can improve combustion stability and reduce noise.

[0006] The third technical problem solved by the present invention is to provide a gas equipment that can improve heat exchange stability and reduce noise.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A burner fire hole plate, characterized in that it comprises a fire hole plate body, wherein the fire hole plate body is provided with a plurality of fire holes which are all arranged through the plate body along the thickness direction, wherein the plurality of fire holes include a plurality of first fire holes and a plurality of second fire holes;

[0009] The first fire holes and the second fire holes are alternately arranged along the length direction and the width direction of the fire hole plate body;

[0010] The first fire hole includes a main fire hole and a secondary fire hole connected to the main fire hole. The secondary fire hole is located at the air outlet end of the main fire hole. The aperture of the secondary fire hole gradually increases from the air inlet end to the air outlet end of the secondary fire hole. The second fire hole and the main fire hole are both circular holes of equal diameter.

[0011] Compared with the background technology, the burner fire hole plate of the utility model has the following beneficial effects:

[0012] In the burner fire hole plate, the cross-sectional area of the secondary fire hole gradually increases from the air inlet end to the air outlet end of the fire hole. When the air flow flows from the main fire hole into the secondary fire hole with a larger aperture, a vortex is formed in the secondary fire hole, thereby achieving the effect of improving flame stability.

[0013] After the air flow enters the secondary fire hole with a gradually increasing aperture, the flow rate gradually decreases. When the load is large, the outlet end of the secondary fire hole is not prone to flame separation, and the flames formed at the outlet end of the first fire hole and the outlet end of the second fire hole are of different heights. The first fire hole and the second fire hole are alternately arranged along the length and width directions of the fire hole plate body, so that multiple first fire holes can be arranged around the second fire hole, and multiple second fire holes can be arranged around the first fire hole. When the burner is working under a larger load condition, the flame with a lower height can ignite the surrounding gas, avoiding the flame separation phenomenon of the flame with a higher height, thereby improving flame stability and reducing combustion noise.

[0014] In one embodiment, the diameter of the main fire hole is equal to the diameter of the second fire hole.

[0015] In one embodiment, the secondary fire hole is a hole formed by rotating a busbar around a central axis, and the busbar is an arc or a straight line segment.

[0016] In one embodiment, the first flame hole further comprises a first flame stabilizing hole provided at an end of the secondary flame hole away from the primary flame hole, the first flame stabilizing hole and the secondary flame hole being connected to form a stepped hole, and the cross-sectional area of the first flame stabilizing hole is larger than the cross-sectional area of the gas outlet end of the secondary flame hole;

[0017] And / or, a second flame stabilizing hole is formed at the gas outlet end of the second fire hole, the gas outlet end of the second fire hole and the second flame stabilizing hole are connected to form a stepped hole, and the cross-sectional area of the second flame stabilizing hole is larger than the cross-sectional area of the gas outlet end of the second fire hole.

[0018] In one embodiment, along the length direction of the fire hole plate body, one second fire hole is provided between two adjacent first fire holes, and one first fire hole is provided between two adjacent second fire holes;

[0019] Along the width direction of the fire hole plate body, one second fire hole is arranged between two adjacent first fire holes, and one first fire hole is arranged between two adjacent second fire holes.

[0020] In one embodiment, along the length direction of the fire hole plate body, adjacent first flame stabilization holes and second flame stabilization holes are not connected, and along the width direction of the fire hole plate body, adjacent two first flame stabilization holes and second flame stabilization holes are not connected;

[0021] Or, along the length direction of the fire hole plate body, the adjacent first flame stabilizing holes and the second flame stabilizing holes are connected by a connecting groove, and along the width direction of the fire hole plate body, the adjacent two first flame stabilizing holes and the second flame stabilizing holes are connected by a connecting groove, and the connecting groove is opened on the gas outlet end surface of the fire hole plate body.

[0022] In one embodiment, the inner wall of the air inlet end of the fire hole is connected to the air inlet end surface of the fire hole plate body via a second chamfered surface, and the second chamfered surface forms a guide hole.

[0023] In one embodiment, the guide hole is a tapered hole.

[0024] The second technical problem mentioned above is solved by the following technical solution:

[0025] A burner comprising the burner fire hole plate described in any of the above embodiments.

[0026] Compared with the background technology, the burner described in the utility model has the following beneficial effects:

[0027] The burner includes the above-mentioned burner fire hole plate. In the burner fire hole plate, the cross-sectional area of the secondary fire hole gradually increases from the air inlet end to the air outlet end of the fire hole. When the air flow flows from the main fire hole into the secondary fire hole with a larger aperture, a vortex is formed in the secondary fire hole, thereby achieving the effect of improving flame stability.

[0028] After the air flow enters the secondary fire hole with a gradually increasing aperture, the flow rate gradually decreases. When the load is large, the outlet end of the secondary fire hole is not prone to flame separation, and the flames formed at the outlet end of the first fire hole and the outlet end of the second fire hole are of different heights. The first fire hole and the second fire hole are alternately arranged along the length and width directions of the fire hole plate body, so that multiple first fire holes can be arranged around the second fire hole, and multiple second fire holes can be arranged around the first fire hole. When the burner is working under a larger load condition, the flame with a lower height can ignite the surrounding gas, avoiding the flame separation phenomenon of the flame with a higher height, thereby improving flame stability and reducing combustion noise.

[0029] The third technical problem mentioned above is solved by the following technical solution:

[0030] Gas equipment, including the above-mentioned burner.

[0031] Compared with the background technology, the gas equipment described in the utility model has the following beneficial effects:

[0032] The gas equipment includes the above-mentioned burner fire hole plate, in which the cross-sectional area of the secondary fire hole gradually increases from the air inlet end to the air outlet end of the fire hole. When the air flow flows from the main fire hole into the secondary fire hole with a larger aperture, a vortex is formed in the secondary fire hole, thereby achieving the effect of improving flame stability. Moreover, the flow rate of the air flow from the secondary fire hole gradually decreases after entering the secondary fire hole with a gradually increasing aperture. Under heavy load, the outlet end of the secondary fire hole is not prone to flame separation. Moreover, the flames formed at the air outlet end of the first fire hole and the air outlet end of the second fire hole are of different heights. The first fire hole and the second fire hole are alternately arranged along the length and width directions of the fire hole plate body, so that multiple first fire holes can be arranged around the second fire hole, and multiple second fire holes can be arranged around the first fire hole. When the burner is working under heavy load conditions, the flame with a lower height can ignite the surrounding gas, avoiding the flame separation phenomenon of the flame with a higher height, thereby improving flame stability and reducing combustion noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a cross-sectional view of a first burner fire hole plate provided by an embodiment of the present utility model;

[0034] Figure 2 This is a structural diagram of a first burner fire hole plate provided by an embodiment of the present utility model;

[0035] Figure 3 This is a top view of the first burner fire hole plate provided by an embodiment of the utility model;

[0036] Figure 4 This is a structural diagram of a second burner fire hole plate provided by an embodiment of the present utility model;

[0037] Figure 5 This is a structural diagram of a third burner fire hole plate provided by an embodiment of the present utility model;

[0038] Figure 6 yes Figure 5 A partial enlarged schematic diagram of point E in the middle.

[0039] In the picture:

[0040] 1. First flame hole; 11. Main flame hole; 12. Secondary flame hole; 13. First flame stabilizing hole; 2. Second flame hole; 3. Gas outlet end face; 4. Gas inlet end face; 5. Second flame stabilizing hole; 61. Connecting groove; 62. Flame stabilizing convex portion; 7. Diversion hole;

[0041] 100. Fire hole plate body. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0044] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0046] An embodiment of the utility model provides a burner fire hole plate, which is a ceramic plate.

[0047] like Figures 1 to 3 As shown, the burner fire hole plate includes a fire hole plate body 100, and the fire hole plate body 100 is provided with a plurality of fire holes arranged along its thickness direction, and the plurality of fire holes include a first fire hole 1 and a second fire hole 2, and the first fire hole 1 and the second fire hole 2 are alternately arranged along the length direction and the width direction of the fire hole plate body 100.

[0048] Among them, the first fire hole 1 includes a main fire hole 11 and a secondary fire hole 12 connected to the main fire hole 11. The secondary fire hole 12 is located at the air outlet end of the main fire hole 11. From the air inlet end to the air outlet end of the secondary fire hole 12, the aperture of the secondary fire hole 12 gradually increases; the second fire hole 2 and the main fire hole 11 are both equal-diameter circular holes.

[0049] Exemplarily, the primary fire hole 11 and the secondary fire hole 12 of the first fire hole 1 are coaxially arranged.

[0050] In the burner fire hole plate, the cross-sectional area of the secondary fire hole 12 gradually increases from the air inlet end to the air outlet end of the fire hole. When the air flow flows from the main fire hole 11 into the secondary fire hole 12 with a larger aperture, a vortex is formed in the secondary fire hole 12, thereby achieving the effect of improving flame stability.

[0051] After the air flow enters the secondary fire hole 12 with a gradually increasing aperture, the flow rate gradually decreases. When the load is large, the outlet end of the secondary fire hole 12 is not prone to flame separation, and the flames formed at the outlet end of the first fire hole 1 and the outlet end of the second fire hole 2 are of different heights. The first fire hole 1 and the second fire hole 2 are alternately arranged along the length and width directions of the fire hole plate body 100, so that multiple first fire holes 1 are arranged around the second fire hole 2, and multiple second fire holes 2 are arranged around the first fire hole 1, so that when the burner is working under a larger load condition, the flame with a lower height can ignite the surrounding gas, avoiding the flame separation phenomenon of the flame with a higher height, thereby improving flame stability and reducing combustion noise.

[0052] In some embodiments, as Figure 1 As shown, the aperture of the main fire hole 11 is equal to the aperture of the second fire hole 2, so that the air flow velocity in the main fire hole 11 is equal to the air flow velocity in the second fire hole 2. After the air flow in the main fire hole 11 enters the secondary fire hole 12, the air flow velocity decreases, so that the flame height formed at the air outlet end of the first fire hole 1 is lower, and the flame height formed at the air outlet end of the second fire hole 2 is higher. When the burner is operating under high load conditions, the flame at the air outlet end of the first fire hole 1 can ignite the flame at the air outlet end of the second fire hole 2, thereby effectively avoiding the flame separation phenomenon of the fire hole plate and improving combustion stability.

[0053] In some embodiments, as Figure 2 and Figure 3 As shown, along the length direction of the fire hole plate body 100, a second fire hole 2 is set between two adjacent first fire holes 1, and a first fire hole 1 is set between two adjacent second fire holes 2; along the width direction of the fire hole plate body 100, a second fire hole 2 is set between two adjacent first fire holes 1, and a first fire hole 1 is set between two adjacent second fire holes 2.

[0054] Such an arrangement can ensure that at least two second fire holes 2 are arranged around each first fire hole 1, and at least two first fire holes 1 are arranged around each second fire hole 2, so that when the burner is working under a larger load condition, the flame at the outlet end of the first fire hole 1 can ignite the airflow at the outlet end of the second fire hole 2, avoiding the flame separation phenomenon at the outlet end of the second fire hole 2, so as to achieve the purpose of improving flame stability.

[0055] In some embodiments, the secondary flame hole 12 is formed by rotating a busbar around the central axis, where the busbar is a straight line segment. In other words, the secondary flame hole 12 is a tapered hole. In other embodiments, the busbar can also be an arc-shaped hole.

[0056] In some embodiments, as Figure 1 As shown, the diameter of the primary fire hole 11 is D1, and the maximum diameter of the secondary fire hole 12 is D2, with D2:D1 = 1.1 to 3. By limiting the ratio of D2 to D1, it is possible to ensure that the flame at the outlet of the first fire hole 1 can ignite the airflow at the outlet of the second fire hole 2.

[0057] It should be noted that the ratio of D2 to D1 can be 1.1, or 3, or any value between 1.1 and 3. For example, D2:D1=1.4.

[0058] In some embodiments, as Figure 1 and Figure 3 As shown, the first fire hole 1 also includes a first flame stabilizing hole 13 arranged at the end of the secondary fire hole 12 away from the main fire hole 11. The first flame stabilizing hole 13 is connected to the secondary fire hole 12 to form a stepped hole, and the cross-sectional area of the first flame stabilizing hole 13 is larger than the cross-sectional area of the gas outlet end of the secondary fire hole 12.

[0059] Exemplarily, the first flame-stabilizing hole 13 is a circular hole of equal diameter, and the first flame-stabilizing hole 13 and the corresponding secondary flame hole 12 are coaxially arranged.

[0060] The airflow enters the first flame stabilization hole 13 with a suddenly increased aperture from the secondary fire hole 12, so that the first flame stabilization hole 13 forms a reflow zone, which is beneficial to further stabilize the flow rate of the airflow, thereby improving the flame stabilization effect.

[0061] In other embodiments, Figure 4 As shown, a second flame stabilizing hole 5 is formed at the gas outlet end of the second fire hole 2. The gas outlet end of the second fire hole 2 and the second flame stabilizing hole 5 are connected to form a stepped hole. The cross-sectional area of the second flame stabilizing hole 5 is larger than the cross-sectional area of the gas outlet end of the second fire hole 2.

[0062] Exemplarily, the first flame stabilizing hole 13 is a circular hole of equal diameter, and the second flame stabilizing hole 5 and the corresponding second flame hole 2 are coaxially arranged.

[0063] The airflow enters the second flame stabilization hole 5 with a suddenly increased aperture from the second fire hole 2, so that the second flame stabilization hole 5 forms a reflow zone, which is beneficial to further stabilize the flow rate of the airflow, thereby improving the flame stabilization effect.

[0064] exist Figure 3 In the embodiment shown, only the first flame stabilizing hole 13 is provided, and the second flame stabilizing hole 5 is not provided. Figure 4In the embodiment shown, the first flame stabilization hole 13 and the second flame stabilization hole 5 are provided at the same time. Along the length direction of the fire hole plate body 100, adjacent first flame stabilization holes 13 and second flame stabilization holes 5 are not connected to each other. Along the width direction of the fire hole plate, adjacent first flame stabilization holes 13 and second flame stabilization holes 5 are not connected to each other.

[0065] like Figure 5 and Figure 6 In the illustrated embodiment, adjacent first and second flame-stabilizing holes 13 and 5 are connected along the length of the fire-perforated plate body 100 via a connecting groove 61. Along the width of the fire-perforated plate body 100, two adjacent first and second flame-stabilizing holes 13 and 5 are connected via a connecting groove 61. The connecting groove 61 is located on the gas outlet end surface 3 of the fire-perforated plate body 100. Specifically, a flame-stabilizing protrusion 62 is formed between four adjacent fire holes distributed along the length and width of the fire-perforated plate body 100. The airflow from the first and second flame-stabilizing holes 13 and 5 merges through the connecting groove 61, further stabilizing the airflow velocity and improving the flame stabilization effect.

[0066] Exemplarily, the flame-stabilizing protrusions 62 are formed in the side walls of four communicating grooves 61 , and two adjacent side walls are smoothly connected by arc surfaces.

[0067] like Figure 4 In the embodiment shown and Figure 5 In the illustrated embodiment, the ratio p of the cross-sectional area of the first flame stabilization hole 13 to the maximum cross-sectional area of the secondary flame hole 12 is 1.5 to 3. By selecting an appropriate value for p, flame stability is improved. It should be noted that the ratio p can be 1.5, 3, or any other value between 1.5 and 3. The aperture of the second flame stabilization hole 13 is equal to that of the first flame stabilization hole 13.

[0068] In some embodiments, as Figure 1 As shown, the inner wall of the air inlet end of the fire hole is connected to the air inlet end surface 4 of the fire hole plate body 100 through a second chamfered surface, and the second chamfered surface forms a guide hole 7. In other words, the guide hole 7 is a tapered hole. Exemplarily, the guide hole 7 and the fire hole are coaxially arranged.

[0069] The provision of the guide holes 7 is beneficial to reducing airflow resistance, allowing the airflow to smoothly pass through the guide holes 7 into the fire hole. The guide holes 7 play a guiding role, which is beneficial to improving combustion stability.

[0070] In some embodiments, as Figure 1 As shown, the cone angle of the guide hole 7 is 30° to 150°. The cone angle of the guide hole 7 is denoted as α, which can be 30°, 150°, or any angle between 30° and 150°. For example, α=74°.

[0071] In some embodiments, the present invention further provides a burner, comprising a burner fire hole plate as provided in any of the above embodiments.

[0072] The burner includes the above-mentioned burner fire hole plate. In the burner fire hole plate, the cross-sectional area of the secondary fire hole 12 gradually increases from the air inlet end to the air outlet end of the fire hole. When the air flow flows from the main fire hole 11 into the secondary fire hole 12 with a larger aperture, a vortex is formed in the secondary fire hole 12, thereby achieving the effect of improving flame stability.

[0073] After the air flow enters the secondary fire hole 12 with a gradually increasing aperture, the flow rate gradually decreases. When the load is large, the outlet end of the secondary fire hole 12 is not prone to flame separation, and the flames formed at the outlet end of the first fire hole 1 and the outlet end of the second fire hole 2 are of different heights. The first fire hole 1 and the second fire hole 2 are alternately arranged along the length and width directions of the fire hole plate body 100, so that multiple first fire holes 1 are arranged around the second fire hole 2, and multiple second fire holes 2 are arranged around the first fire hole 1, so that when the burner is working under a larger load condition, the flame with a lower height can ignite the surrounding gas, avoiding the flame separation phenomenon of the flame with a higher height, thereby improving flame stability and reducing combustion noise.

[0074] In some embodiments, the present invention further provides a gas appliance including the above-mentioned burner. It should be noted that the gas appliance may be a gas water heater, a gas heater, a gas wall-mounted boiler, etc., which will not be described one by one here.

[0075] The gas equipment includes the above-mentioned burner fire hole plate. In the burner fire hole plate, the cross-sectional area of the secondary fire hole 12 gradually increases from the air inlet end to the air outlet end of the fire hole. When the air flow flows from the main fire hole 11 into the secondary fire hole 12 with a larger aperture, a vortex is formed in the secondary fire hole 12, thereby achieving the effect of improving flame stability.

[0076] After the air flow enters the secondary fire hole 12 with a gradually increasing aperture, the flow rate gradually decreases. When the load is large, the outlet end of the secondary fire hole 12 is not prone to flame separation, and the flames formed at the outlet end of the first fire hole 1 and the outlet end of the second fire hole 2 are of different heights. The first fire hole 1 and the second fire hole 2 are alternately arranged along the length and width directions of the fire hole plate body 100, so that multiple first fire holes 1 are arranged around the second fire hole 2, and multiple second fire holes 2 are arranged around the first fire hole 1, so that when the burner is working under a larger load condition, the flame with a lower height can ignite the surrounding gas, avoiding the flame separation phenomenon of the flame with a higher height, thereby improving flame stability and reducing combustion noise.

[0077] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The specific contents of the above-mentioned specific embodiments only express several embodiments of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. Burner fire hole plate, characterized in that, The fire hole plate body (100) is provided with a plurality of fire holes that are all provided through the plate body along its thickness direction, wherein the plurality of fire holes include a plurality of first fire holes (1) and a plurality of second fire holes (2); The first fire holes (1) and the second fire holes (2) are alternately arranged along the length direction and the width direction of the fire hole plate body (100); The first fire hole (1) comprises a main fire hole (11) and a secondary fire hole (12) connected to the main fire hole (11); the secondary fire hole (12) is located at the air outlet end of the main fire hole (11); and the aperture of the secondary fire hole (12) gradually increases from the air inlet end to the air outlet end of the secondary fire hole (12); and the second fire hole (2) and the main fire hole (11) are both circular holes of equal diameter.

2. The burner fire hole plate according to claim 1, characterized in that: The aperture of the main fire hole (11) is equal to the aperture of the second fire hole (2).

3. The burner fire hole plate according to claim 1, characterized in that: The secondary fire hole (12) is a hole formed by rotating a busbar around a central axis, and the busbar is an arc or a straight line segment.

4. The burner fire hole plate according to claim 1, characterized in that: The first fire hole (1) further comprises a first flame stabilizing hole (13) arranged at one end of the secondary fire hole (12) away from the main fire hole (11), the first flame stabilizing hole (13) and the secondary fire hole (12) being connected to form a stepped hole, and the cross-sectional area of the first flame stabilizing hole (13) is larger than the cross-sectional area of the gas outlet end of the secondary fire hole (12); And / or, a second flame stabilizing hole (5) is formed at the gas outlet end of the second fire hole (2), the gas outlet end of the second fire hole (2) and the second flame stabilizing hole (5) are connected to form a stepped hole, and the cross-sectional area of the second flame stabilizing hole (5) is larger than the cross-sectional area of the gas outlet end of the second fire hole (2).

5. The burner fire hole plate according to claim 4, characterized in that: Along the length direction of the fire hole plate body (100), one second fire hole (2) is provided between two adjacent first fire holes (1), and one first fire hole (1) is provided between two adjacent second fire holes (2); Along the width direction of the fire hole plate body (100), one second fire hole (2) is arranged between two adjacent first fire holes (1), and one first fire hole (1) is arranged between two adjacent second fire holes (2).

6. The burner fire hole plate according to claim 5, characterized in that: Along the length direction of the fire hole plate body (100), adjacent first flame stabilization holes (13) and second flame stabilization holes (5) are not connected; along the width direction of the fire hole plate body (100), adjacent two first flame stabilization holes (13) and second flame stabilization holes (5) are not connected; Alternatively, along the length direction of the fire hole plate body (100), the adjacent first flame stabilizing holes (13) and the second flame stabilizing holes (5) are connected through a connecting groove (61); along the width direction of the fire hole plate body (100), the adjacent two first flame stabilizing holes (13) and the second flame stabilizing holes (5) are connected through a connecting groove (61), and the connecting groove (61) is opened on the gas outlet end surface (3) of the fire hole plate body (100).

7. The burner fire hole plate according to any one of claims 1 to 6, characterized in that: The inner wall of the air inlet end of the fire hole is connected to the air inlet end surface (4) of the fire hole plate body (100) via a second chamfered surface, and the second chamfered surface forms a guide hole (7).

8. The burner fire hole plate according to claim 7, characterized in that: The guide hole (7) is a tapered hole.

9. Burner, characterized in that The burner fire hole plate comprises the burner fire hole plate according to any one of claims 1 to 8.

10. Gas equipment, characterized in that Comprising the burner according to claim 9.

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