Fire grate and gas equipment
By designing a fire discharge structure with multiple second fire holes, the poor flue gas performance and high nitrogen oxide emission problems caused by the fire hole structure of the traditional burner are solved, and the effects of uniform flame and low nitrogen emission are achieved.
Patent Information
- Application Number
- CN202420674321.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The fire pore structure of traditional burners has a small fire pore area, resulting in poor combustion flue gas performance and high nitrogen oxides, which cannot meet the requirements of low nitrogen emission performance.
A fire discharge is designed, including an air flow channel in the shell and a plurality of air outlet areas on the top. The air outlet area is provided with a first fire hole and a plurality of second fire holes. The area of the second fire hole is greater than the area of the first fire hole, and the plurality of second fire holes are distributed around the peripheral edge of the first fire hole.
By increasing the flame area and uniform air flow distribution, the flame height is reduced, and the flame stabilization effect is achieved, making the combustion more sufficient and the emission of nitrogen oxides is reduced.
Smart Images
Figure CN222703305U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas equipment, in particular to a fire grate and gas equipment. Background Art
[0002] The burner is the core component of gas equipment.
[0003] In the related art, the fire hole structure of the burner usually adopts a single-strip fire hole structure. This single-strip fire hole structure has a small fire hole area and a high burning fire hole intensity. The flue gas performance emitted by instantaneous combustion is poor, resulting in higher nitrogen oxides and cannot meet the low nitrogen emission performance requirements. Utility Model Content
[0004] The main purpose of the utility model is to provide a fire grate, which is intended to make the flame uniform, reduce the flame height, achieve full combustion, and reduce the emission of nitrogen oxides.
[0005] To achieve the above-mentioned purpose, the utility model provides a fire grate, comprising a shell, an air flow channel is formed in the shell, a plurality of air outlet areas connected to the air flow channel are provided on the top of the shell, and the plurality of air outlet areas are spaced apart and distributed along the length direction of the fire grate;
[0006] The gas outlet area is provided with a first fire hole and a plurality of second fire holes, and the plurality of second fire holes are distributed at intervals around the periphery of the first fire hole, wherein the area of the second fire hole is larger than the area of the first fire hole.
[0007] In one embodiment of the present application, the plurality of second fire holes in the same gas outlet area are centrally symmetrically distributed; and the first fire hole is disposed at the symmetrical center of the plurality of second fire holes.
[0008] In one embodiment of the present application, the projection shape of the first fire hole is a centrally symmetrical figure.
[0009] In one embodiment of the present application, the symmetry center of the first fire hole coincides with the symmetry center of the plurality of second fire holes.
[0010] In one embodiment of the present application, the first fire hole includes a central hole and a plurality of edge holes connected to the central hole, wherein the plurality of edge holes are spaced apart around the periphery of the central hole; and the area of the edge holes is smaller than that of the central hole.
[0011] In an embodiment of the present application, a partition is provided between each two adjacent second fire holes, and the hole edge of each edge hole protrudes from the center hole toward one of the partitions.
[0012] In one embodiment of the present application, the edge of the edge hole away from the central hole is arranged in a tooth shape.
[0013] In one embodiment of the present application, four second fire holes are provided in each of the gas outlet areas, two of the four second fire holes are arranged in a mirror image in the length direction of the fire bar, and the other two are arranged in a mirror image in the width direction of the fire bar;
[0014] And / or, the second fire holes are arranged in a toothed shape at the edges in the width direction of the fire bar.
[0015] In one embodiment of the present application, the fire bar further includes a metal mesh disposed on the top of the shell, and the metal mesh covers the multiple air outlet areas.
[0016] In one embodiment of the present application, the fire bar further includes a diversion component disposed below the metal mesh, and the diversion component divides the airflow channel into a plurality of sub-channels in the width direction of the fire bar, and the plurality of sub-channels are all connected to the plurality of air outlet areas.
[0017] In one embodiment of the present application, the fire bar further includes a speed reduction net disposed in the shell, and the speed reduction net is spaced below the metal net.
[0018] In one embodiment of the present application, the fire bar also includes two flame stabilizing plates respectively arranged on both sides of the shell in the width direction, and the two flame stabilizing plates are respectively spaced apart from the two side walls of the shell to form a flame stabilizing cavity, the side wall of the shell is provided with a side air outlet connecting the airflow channel and the flame stabilizing cavity, and the top of the flame stabilizing cavity is provided with a flame stabilizing port.
[0019] To achieve the above objectives, the present application also provides a gas device, including the above-mentioned fire grate.
[0020] In the fire grate of the utility model technical solution, an airflow channel is formed in the shell, and a plurality of air outlet areas connected to the airflow channel are arranged on the top of the shell, and the plurality of air outlet areas are arranged at intervals along the length direction of the fire grate to achieve the purpose of uniform flame. By arranging a first fire hole and a plurality of second fire holes in the air outlet area, the air outlet area can be increased, and at the same time, the plurality of second fire holes are arranged at intervals around the periphery of the first fire hole, and the area of the first fire hole is smaller than that of the second fire hole, which can, on the one hand, achieve uniform airflow and uniform flame, and on the other hand, can reduce the airflow speed through the first fire hole with a smaller area in the middle, lower the overall flame height of the air outlet area, achieve the effect of stabilizing the flame, make the combustion more complete, and reduce the emission of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0022] Figure 1 This is a structural schematic diagram of an embodiment of the fire grate of the utility model;
[0023] Figure 2 for Figure 1 A top view of an embodiment of the present invention;
[0024] Figure 3 for Figure 2 A structural layout diagram of the first fire hole and the second fire hole in the embodiment;
[0025] Figure 4 for Figure 1 A cross-sectional view of an embodiment in which no speed reduction net is provided inside the middle fire bar;
[0026] Figure 5 for Figure 1 A cross-sectional view of an embodiment of a middle fire bar with a speed reduction net inside;
[0027] Figure 6 This is a schematic diagram of the structure of multiple fire bars in this embodiment;
[0028] Figure 7 It is a structural schematic diagram of another embodiment of the fire grate of the utility model;
[0029] Figure 8 for Figure 7 A top view of an embodiment of the present invention;
[0030] Fig. 9 for Figure 8 Structural layout diagram of the first fire hole and the second fire hole in the embodiment.
[0031] Description of Figure Numbers:
[0032] Label name Label name 1 Fire row 13 Speed reduction network 11 case 14 Flow divider 101 First fire hole 15 Flame Stabilizer 101a Center hole 151 Flame stabilization chamber 101b Edge holes 151a Wenyankou 102 Second fire hole 152 Lateral convex hull 103 Divider A Airflow Channel 104 Side air outlet A1 Subchannel 12 Metal Mesh B Exhaust area
[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0036] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.
[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0038] The burner is the core component of the gas equipment, and a fire grate is set inside the burner. In the traditional burner structure, the fire hole structure of the fire grate is mostly a strip structure. This strip fire hole structure has a small fire hole area, and the smoke performance emitted by instantaneous combustion is poor, which easily leads to high nitrogen oxides. In the related art, the fire hole structure is set to a square hole structure with a larger opening, but because the opening area is too large and the exhaust speed is too fast, it leads to the problem of excessive combustion flame and incomplete combustion.
[0039] Based on this, the utility model proposes a fire grate 1, which aims to increase the flame area, achieve uniform flame, reduce flame height, reduce the thermal intensity of flame combustion, ensure complete combustion, and reduce the generation of nitrogen oxides by improving the fire hole structure on the top of the fire grate 1.
[0040] In the embodiment of the present utility model, Figures 1 to 3 as well as Figures 7 to 9As shown, the fire bar 1 includes a shell 11, in which an airflow channel A is formed, and a top of the shell 11 is provided with a plurality of air outlet areas B connected to the airflow channel A, and the plurality of air outlet areas B are distributed at intervals along the length direction of the fire bar 1; the air outlet area B is provided with a first fire hole 101 and a plurality of second fire holes 102, and the plurality of second fire holes 102 are distributed at intervals around the periphery of the first fire hole 101, wherein the area of the second fire hole 102 is greater than that of the first fire hole 101.
[0041] The fire grate 1 is used on a burner, and the air inlet of the air flow channel A in the shell 11 is connected to the air flow source, and the air flow source includes air and gas. The gas and air enter the air flow channel A from the air inlet, and the gas and air are pre-mixed in the air flow channel A, and then ejected through the first fire hole 101 and the second fire hole 102 in the multiple gas outlet areas B of the shell 11 and ignited to form a combustion flame. The multiple gas outlet areas B are arranged at intervals along the length direction of the fire grate 1, which can play the role of diverting gas, so that the air and gas are fully mixed and the flame is uniform. In the present embodiment, a first fire hole 101 and a plurality of second fire holes 102 are arranged in the gas outlet area B, and the plurality of second fire holes 102 are spaced apart around the periphery of the first fire hole 101, and the area of the second fire hole 102 is larger than that of the first fire hole 101, that is, the first fire hole 101 with a smaller area is located in the middle of the plurality of second fire holes 102 with a larger area. With such an arrangement, on the one hand, the overall fire outlet area can be increased, and on the other hand, the air flow velocity can be reduced through the first fire hole 101 with a smaller area in the middle to lower the flame height, thereby playing a role in stabilizing the flame, making the combustion more complete, and reducing the emission of nitrogen oxides.
[0042] In actual application, the shape structure of the first fire hole 101 and the second fire hole 102 can be determined according to actual conditions, such as square holes, round holes, or other special-shaped holes. The shapes of the first fire hole 101 and the second fire hole 102 can be the same or different. The number of the plurality of second fire holes 102 can be three, four, five, or more than five, and the specific number can be determined according to the specification and volume of the actual product.
[0043] The plurality of second fire holes 102 are spaced around the periphery of the first fire hole 101. It is understandable that the plurality of second fire holes 102 are evenly distributed around the periphery of the first fire hole 101, or the plurality of second fire holes 102 are unevenly distributed around the periphery of the first fire hole 101. In practical applications, it is preferred to evenly distribute the plurality of second fire holes 102 around the periphery of the first fire hole 101 to further improve the uniformity of the distribution of the outlet airflow and the uniformity of the flame. In addition, it should be noted that in practical applications, the first fire hole 101 can be located at the center of the shape surrounded by the plurality of second fire holes 102 or can be located at a position offset from the center, both of which can play a role in pulling down the flame to stabilize the flame.
[0044] In the fire grate 1 of the technical solution of the utility model, an airflow channel A is formed in the shell 11, and a plurality of air outlet areas B connected to the airflow channel A are arranged on the top of the shell 11. The plurality of air outlet areas B are arranged at intervals along the length direction of the fire grate 1 to achieve the purpose of uniform flame. By arranging a first fire hole 101 and a plurality of second fire holes 102 in the air outlet area B, the air outlet area can be increased. At the same time, the plurality of second fire holes 102 are arranged at intervals around the periphery of the first fire hole 101, and the area of the first fire hole 101 is smaller than the area of the second fire hole 102. On the one hand, the airflow and flame can be uniformed. On the other hand, the airflow velocity can be reduced through the first fire hole 101 with a smaller area in the middle, and the overall flame height of the air outlet area B can be lowered to achieve the effect of stabilizing the flame, so that the combustion is more complete and the emission of nitrogen oxides is reduced.
[0045] In one embodiment of the present application, Figure 2 , Figure 3 , Figure 8 as well as Fig. 9 The multiple second fire holes 102 in the same gas outlet area B are distributed symmetrically to the center; the first fire hole 101 is arranged at the symmetrical center of the multiple second fire holes 102.
[0046] The plurality of second fire holes 102 are centrally symmetrically distributed. It can be understood that the plurality of second fire holes 102 can overlap with the original shape of the plurality of second fire holes 102 after rotating 180° around the symmetry center.
[0047] In this embodiment, the multiple second fire holes 102 are distributed symmetrically in the center, so that the airflow distribution from the multiple second fire holes 102 is more uniform, and the combustion flame is more uniform. At the same time, the first fire hole 101 is located at the symmetrical center of the multiple second fire holes 102, so that the first fire hole 101 is located at the center of the shape surrounded by the multiple second fire holes 102, and the first fire hole 101 with a smaller area has a more balanced effect of lowering the flames of the multiple second fire holes 102, thereby being able to lower the flame of the gas outlet area B as a whole, making the flame of the gas outlet area B more stable and uniform.
[0048] Furthermore, if Figure 2 , Figure 3 , Figure 8 as well as Fig. 9 , the projection shape of the first fire hole 101 is a centrally symmetrical figure.
[0049] It is understandable that the first fire hole 101 can be rotated 180° around its own symmetry center to coincide with the shape of the first fire hole 101. For example, the projection shape of the first fire hole 101 can be a regular shape such as a circle or a square, or can be other irregular central symmetric shapes.
[0050] Such a design, on the one hand, makes the airflow out of the first fire hole 101 more uniform, and on the other hand, is more convenient for processing and forming, thereby simplifying the forming process.
[0051] Furthermore, if Figure 2 , Figure 3 , Figure 8 as well as Fig. 9 , the symmetry center of the first fire hole 101 coincides with the symmetry center of the plurality of second fire holes 102 .
[0052] Such an arrangement makes the distance between the first fire hole 101 and each second fire hole 102 consistent, so that the flame at the first fire hole 101 has a more balanced effect of lowering the flames at the plurality of second fire holes 102, further improving the flame uniformity and achieving a better flame stabilization effect.
[0053] In one embodiment of the present application, Figure 3 and Fig. 9 The first fire hole 101 includes a central hole 101a and a plurality of edge holes 101b connected to the central hole 101a. The plurality of edge holes 101b are spaced apart and distributed around the periphery of the central hole 101a. The area of the edge holes 101b is smaller than that of the central hole 101a.
[0054] This embodiment illustrates the shape structure of the first fire hole 101. The periphery of the central hole 101a is connected with a plurality of edge holes 101b. Compared with the solution with only the central hole 101a, the gas outlet area of the first fire hole 101 is increased. At the same time, the area of the edge holes 101b is smaller than that of the central hole 101a. The edge holes 101b can further lower the flame on the basis of the central hole 101a with a relatively large opening, thereby achieving a better flame stabilization effect.
[0055] In actual application, the shape structure of the center hole 101a can be determined according to actual conditions. Considering that the center hole 101a is located in the middle position of the first fire hole 101, a hole structure with a larger opening can be adopted, such as a circular hole, a square hole, a polygonal hole or other special-shaped holes, etc. The specific shape is not limited here.
[0056] In practical applications, the shape structure of the edge hole 101b can be determined according to actual conditions. Considering that the edge hole 101b is located at the edge of the first fire hole 101, a hole structure with a smaller opening can be used, such as a strip hole, a triangular hole or other special-shaped holes.
[0057] The number of edge holes 101b can be determined according to actual conditions, such as 1, 2, 3, 4 or more. The specific number can be determined according to the actual specifications of the fire bar 1 and is not limited here.
[0058] In one embodiment of the present application, Figure 2 , Figure 3 , Figure 8 as well as Fig. 9 A partition 103 is disposed between each two adjacent second fire holes 102 , and the hole edge of each edge hole 101 b protrudes from the center hole 101 a toward a partition 103 .
[0059] In this embodiment, the partition 103 can be understood as a rib structure between two adjacent second fire holes 102 , which plays a role in ensuring the structural strength of the top of the shell 11 .
[0060] In such a design, each edge hole 101b is arranged corresponding to a partition 103, that is, the edge hole 101b is arranged in the area between the two second fire holes 102. Compared with the solution in which the edge hole 101b protrudes toward the second fire hole 102, this embodiment can avoid affecting the area size of the second fire hole 102, and at the same time, there is no need to sacrifice the rib width to ensure the opening area of the edge hole 101b and the second fire hole 102. Therefore, this embodiment can ensure the overall structural strength while increasing the air outlet area and reducing the flame height, so that the combustion is more uniform and sufficient.
[0061] Furthermore, the edge of the edge hole 101b away from the central hole 101a is arranged in a tooth shape.
[0062] Such a setting, on the one hand, can extend the edge length of the edge hole 101b, and the teeth can disperse the airflow, increase the area of flame combustion, and make the combustion more complete; on the other hand, the opening width of the tooth structure is smaller than the opening width of the center hole 101a, which can reduce the airflow speed, reduce the flame height, and achieve the effect of stabilizing the flame.
[0063] In one embodiment of the present application, Figure 2 , Figure 3 , Figure 8 as well as Fig. 9 Four second fire holes 102 are provided in each gas outlet area B, two of the four second fire holes 102 are mirror-disposed in the length direction of the fire bar 1 , and the other two are mirror-disposed in the width direction of the fire bar 1 .
[0064] This embodiment is described by taking the example of four second fire holes 102 in each air outlet area B. The four second fire holes 102 are spaced around the periphery of the first fire hole 101. By setting two of the four second fire holes 102 in a mirror image in the length direction of the fire bar 1 and the other two in a mirror image in the width direction of the fire bar 1, the four second fire holes 102 are formed into a centrally symmetrical shape. Such a setting can not only make the flame uniform, but also simplify the mold design and improve the process efficiency.
[0065] In some embodiments, the first fire hole 101 can be arranged at the symmetrical center of the four second fire holes 102. Accordingly, the first fire hole 101 has four edge holes 101b, and the four edge holes 101b respectively correspond to the partitions 103 between two adjacent second fire holes 102. It can be understood that the projection shape of the first fire hole 101 is roughly in the shape of a "Chinese knot".
[0066] In one embodiment of the present application, Figure 2 , Figure 3 , Figure 8 as well as Fig. 9 The edge of the second fire hole 102 in the width direction of the fire bar 1 is arranged in a tooth shape.
[0067] Such arrangement can extend the edge length of the second fire hole 102 and increase the flame area. At the same time, the toothed structure can disperse the airflow so that the mixed gas of air and gas is more evenly distributed on the top of the fire grate 1, so that the gas can be fully burned.
[0068] In one embodiment of the present application, Figures 2 to 6 The fire bar 1 also includes a metal mesh 12 arranged on the top of the shell 11, and the metal mesh 12 covers a plurality of gas outlet areas B.
[0069] In this embodiment, the metal mesh 12 can be located above or below multiple air outlet areas B. In actual application, since the flame burns above the fire grate 1, the heat resistance and strength requirements of the metal mesh 12 located above the air outlet area B will be higher than the heat resistance and strength requirements of the metal mesh 12 located below the air outlet area B. Considering factors such as cost, the metal mesh 12 can be optionally arranged below the air outlet area B.
[0070] In order to further improve the flame uniformity, the number of layers of the metal mesh 12 can be multiple layers. The multiple layers of the metal mesh 12 can further disperse the air and the gas so that the gas and the air can be mixed evenly. At the same time, the multiple layers of the metal mesh 12 can increase the resistance and play a better anti-backfire effect. In practical applications, the number of layers of the metal mesh 12 is related to the mesh number of the metal mesh 12. The metal mesh 12 with more meshes has fewer layers, and the metal mesh 12 with fewer meshes has more layers. For example, the number of layers of the metal mesh 12 can be 2 to 10 layers, specifically 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, 9 layers or 10 layers. The mesh number of the metal mesh 12 can be 20 to 100 meshes, specifically 20 meshes, 40 meshes, 50 meshes, 60 meshes, 80 meshes or 100 meshes, etc.
[0071] Considering that too many layers may result in insufficient airflow supply and that metal meshes with larger mesh sizes are expensive, as an example, the metal mesh 12 can be a combination of 2 to 5 layers of mesh and 20 to 50 meshes.
[0072] In one embodiment of the present application, Figure 4 and Figure 5 The fire bar 1 also includes a diversion component 14 arranged below the metal mesh 12. The diversion component 14 divides the air flow channel A into multiple sub-channels A1 in the width direction of the fire bar 1. The multiple sub-channels A1 are all connected to the multiple air outlet areas B.
[0073] In this embodiment, the flow dividing component 14 divides the airflow channel A into a plurality of sub-channels A1 in the width direction, which can make the airflow uniform on the one hand, and increase the wind resistance and reduce the wind speed in the airflow channel A on the other hand. In practical applications, the specific structure of the flow dividing component 14 can be determined according to the actual situation, such as a plurality of partition plates or a guide strip structure, etc.
[0074] By setting a diverter component 14 under the metal mesh 12, the diverter component 14 can divert and slow down the airflow in the airflow channel A to reduce the speed of the airflow when it reaches the metal mesh 12, and then after the blocking and dispersing effect of the metal mesh 12, the speed of the airflow ejected from the air outlet area B can be further reduced, thereby reducing the flame intensity and height, making the flame distribution more uniform, the combustion more complete, and reducing nitrogen oxide emissions.
[0075] In one embodiment of the present application, Figure 5 The fire bar 1 further includes a speed reduction net 13 disposed in the shell 11 , and the speed reduction net 13 is spaced below the metal net 12 .
[0076] By adding a speed reduction net 13 below the top metal net 12, the airflow can be first slowed down and dispersed by the speed reduction net 13 when passing through the speed reduction net 13 below, and then flow to the top metal net 12 at a low speed to be slowed down and dispersed again, thereby further reducing the speed of the airflow ejection, reducing the flame height, and making the flame combustion more stable.
[0077] In one embodiment of the present application, Figure 4 and Figure 5 The fire bar 1 also includes two flame stabilizing plates 15 respectively arranged on both sides of the shell 11 in the width direction. The two flame stabilizing plates 15 are respectively spaced apart from the two side walls of the shell 11 to form a flame stabilizing cavity 151. The side wall of the shell 11 is provided with a side air outlet 104 connecting the air flow channel A and the flame stabilizing cavity 151, and the top of the flame stabilizing cavity 151 is provided with a flame stabilizing port 151a.
[0078] In this embodiment, two flame stabilizing sheets 15 are respectively arranged on both sides of the shell 11, and the two flame stabilizing sheets 15 can be welded or riveted to the corresponding side wall of the shell 11, and a flame stabilizing cavity 151 is formed between each flame stabilizing sheet 15 and the corresponding side wall of the shell 11. It can be understood that the two flame stabilizing sheets 15 extend upward and protrude from the top of the fire grate 1, which can play the role of flame guiding and flame stabilization, so that the side flames gather toward the target area of the fire grate, which is conducive to improving the heat gathering effect during the combustion process. The airflow in the airflow channel A can flow into the flame stabilizing cavity 151 through the side air outlet 104, and then flow out from the top flame stabilizing port 151a, which can increase the air output of the fire grate 1 and make the combustion flame more stable.
[0079] In some embodiments, Figure 6 , the two flame stabilizing pieces 15 are respectively provided with a plurality of lateral convex hulls 152 arranged at intervals along the length direction of the fire bar 1. It can be understood that the burner is formed by connecting a plurality of fire bars 1 in parallel, and a flame stabilizing piece 15 is provided on the upper part of each fire bar 1. In this embodiment, by providing a plurality of lateral convex hulls 152 on the flame stabilizing piece 15, it can play a role in positioning two adjacent fire bars 1 or increasing the secondary air supply.
[0080] The utility model also proposes a gas device, which includes a fire grate. The specific structure of the fire grate refers to the above embodiment. Since the gas device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0081] As an example, the combustion device may be a burner, such as an atmospheric burner, a rich-lean burner, a water-cooled burner or other forms of burners.
[0082] As an example, the combustion equipment may also be a gas water heater, a boiler or the like.
[0083] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A fire grate, characterized in that: It comprises a shell, an air flow channel is formed in the shell, a plurality of air outlet areas connected to the air flow channel are arranged on the top of the shell, and the plurality of air outlet areas are spaced apart and distributed along the length direction of the fire bar; The gas outlet area is provided with a first fire hole and a plurality of second fire holes, and the plurality of second fire holes are distributed at intervals around the periphery of the first fire hole, wherein the area of the second fire hole is larger than the area of the first fire hole.
2. The fire bar according to claim 1, characterized in that: The plurality of second fire holes in the same gas outlet area are centrally symmetrically distributed; the first fire hole is arranged at the symmetrical center of the plurality of second fire holes.
3. The fire bar according to claim 2, characterized in that: The projection shape of the first fire hole is a centrally symmetrical figure.
4. The fire bar according to claim 3, characterized in that: The symmetry center of the first fire hole coincides with the symmetry center of the plurality of second fire holes.
5. The fire bar according to any one of claims 1 to 4, characterized in that: The first fire hole includes a central hole and a plurality of edge holes connected to the central hole, wherein the plurality of edge holes are distributed at intervals around the central hole; and the area of the edge holes is smaller than that of the central hole.
6. The fire bar according to claim 5, characterized in that: A partition is provided between each two adjacent second fire holes, and the hole edge of each edge hole protrudes from the central hole toward one of the partitions.
7. The fire bar according to claim 6, characterized in that: The hole edges of the edge holes facing away from the central hole are arranged in a tooth shape.
8. The fire bar according to any one of claims 1 to 4, characterized in that: Four second fire holes are arranged in each of the gas outlet areas, two of the four second fire holes are arranged in a mirror image in the length direction of the fire bar, and the other two are arranged in a mirror image in the width direction of the fire bar; And / or, the second fire holes are arranged in a toothed shape at the edges in the width direction of the fire bar.
9. The fire bar according to any one of claims 1 to 4, characterized in that: The fire bar also includes a metal mesh arranged on the top of the shell, and the metal mesh covers the multiple air outlet areas.
10. The fire bar according to claim 9, characterized in that: The fire bar further includes a diversion component disposed below the metal mesh, wherein the diversion component divides the airflow channel into a plurality of sub-channels in the width direction of the fire bar, and the plurality of sub-channels are all connected to the plurality of air outlet areas.
11. The fire bar according to claim 9, characterized in that: The fire bar also includes a speed reduction net arranged in the shell, and the speed reduction net is arranged below the metal net at intervals.
12. The fire bar according to any one of claims 1 to 4, characterized in that: The fire bar also includes two flame stabilizing plates respectively arranged on both sides of the shell in the width direction, and the two flame stabilizing plates are respectively spaced apart from the two side walls of the shell to form a flame stabilizing cavity. The side wall of the shell is provided with a side air outlet connecting the airflow channel and the flame stabilizing cavity, and the top of the flame stabilizing cavity is provided with a flame stabilizing port.
13. A gas equipment, characterized in that: Comprising a fire bar as claimed in any one of claims 1 to 12.