Combustor

Abstract

The burner comprises a burner cap assembly and a burner head, the burner cap assembly comprises an outer ring burner cap, a center burner cap and a burner cap base, the burner cap base is provided with an air inlet hole set, the burner head comprises a supporting frame and an injection pipe set, the injection pipe set is arranged on the supporting frame, a mixing cavity is formed in the outer ring burner cap, a pressure equalizing plate is arranged in the mixing cavity, and the pressure equalizing plate is arranged on the outer ring burner cap. The pressure equalizing plate covers the whole mixing cavity. The pressure equalizing plate is arranged in the mixing cavity and completely covers the mixing cavity, so that the pressure in the mixing cavity can be well balanced, fuel gas and air are more fully contacted and mixed in the mixing cavity, the combustion efficiency is improved, the flame uniformity and stability of the combustor are improved, the height of the whole circle of flame on the outer ring is consistent, the tempering phenomenon is reduced, and the service life of the combustor is prolonged. And the use safety is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of burners, and in particular relates to a burner. Background Art

[0002] Burners are a general term for devices that spray fuel and air in a certain way for mixed combustion. Burners mainly include an outer ring fire cover, a center fire cover, a burner head, and a fire cover base. Burners are essential kitchen appliances in family life. They heat pots and cook. In the use of existing outer ring fire covers, the flame is high on one side and low on the other, resulting in low combustion efficiency and certain safety hazards. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art and to provide a burner, in which a pressure equalizing plate is arranged in a mixing chamber, and the pressure equalizing plate completely covers the mixing chamber, so as to well balance the pressure in the mixing chamber, so that the gas and air are more fully contacted and mixed in the mixing chamber, thereby improving the combustion efficiency, improving the flame uniformity and stability of the burner, making the flame height of the entire outer ring consistent, reducing the backfire phenomenon, and improving the safety of use.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A burner includes a fire cover assembly and a burner head, wherein the fire cover assembly includes an outer ring fire cover, a central fire cover and a fire cover base, an air inlet group is arranged on the fire cover base, the burner head includes a support frame and an ejector tube group, the ejector tube group is arranged on the support frame, and a mixing chamber is arranged in the outer ring fire cover, so a pressure equalizing plate is arranged in the mixing chamber, and the pressure equalizing plate covers the entire mixing chamber. The present application provides a pressure equalizing plate in the mixing chamber, and the pressure equalizing plate completely covers the mixing chamber, which can well balance the pressure in the mixing chamber, so that the gas and air are more fully contacted and mixed in the mixing chamber, improve the combustion efficiency, improve the flame uniformity and stability of the burner, make the flame height of the entire outer ring consistent, reduce the backfire phenomenon, and improve the safety of use. The corners of the pressure equalizing plate are provided with arc chamfers, the design of the arc chamfers can improve the aesthetics, reduce the risk of scratches, and the arc chamfers can effectively disperse stress and improve the overall structural strength. A convex portion is also provided in the mixing chamber, and the cross-section of the bottom end of the convex portion gradually decreases toward the top end, and the convex portion can change the flow path of the airflow in the mixing chamber and enhance the mixing effect.

[0006] Furthermore, a support column is provided on the support frame, and the bottom surface of the fire cover base protrudes upward to form a positioning recessed hole, the support column matches the positioning recessed hole, and the top end of the support column is clamped and limited in the positioning recessed hole, and the fire cover assembly is supported by the support column to enable the fire cover assembly to be placed stably. The structural design is ingenious and reasonable. The design of the support column can improve the placement stability of the fire cover assembly, and it is convenient to disassemble and assemble, and easy to clean. During actual installation, the support column cooperates with the positioning recessed hole to achieve precise positioning of the fire cover assembly on the burner head, reducing the difficulty of installation, and the design also limits the axial rotation of the fire cover assembly, so that the fire cover assembly will not tip over and has high stability.

[0007] Furthermore, the support column is provided with a threaded portion, and the support frame is provided with a threaded hole. The threaded portion matches the threaded hole, and the threaded portion is screwed into the threaded hole to realize the threaded connection between the support column and the support frame, thereby ensuring the firmness of the connection between the support column and the support frame. The support column and the support frame are easy to assemble and disassemble, can be installed and used at any time, are flexible and convenient, and have strong practicality.

[0008] Furthermore, a liquid collecting pan is arranged on the center fire cover. The liquid collecting pan is a bowl-shaped structure with a larger upper part and a smaller lower part. The liquid collecting pan is welded or riveted to the center fire cover. The peripheral wall of the liquid collecting pan is recessed inward to form a reinforcement portion. The center fire outlet is located below the projection of the liquid collecting pan. The structure is novel. The liquid collecting pan is arranged on the center fire cover to collect liquid droplets dripping from the bottom of the pointed bottom pot to prevent the liquid droplets from entering the fire outlet and causing blockage. The waste liquid is also convenient to clean, which improves the reliability of the center fire cover. The liquid collecting pan and the center fire cover are welded or riveted. The welding fixation ensures the firmness of the connection, so that the two are not easy to loosen automatically. The riveting fixation can reduce abnormalities caused by thermal expansion and contraction. The design of the reinforcement portion can improve the structural strength of the liquid collecting pan, which is not easy to deform at high temperatures and has a long service life.

[0009] Furthermore, a sinking cavity is provided in the mixing cavity, and the air inlet hole group includes an outer ring air inlet and an inner ring air inlet. The outer ring air inlet is located in the sinking cavity, and the sinking cavity is transitionally connected to the mixing cavity through an inclined guide surface. The acute angle β formed by the inclined guide surface and the horizontal plane is 30° to 60°. A sinking cavity is provided in the mixing cavity. The pressure loss is reduced by the buffering of the sinking cavity, the gas flow path is optimized, the stability and efficiency of the gas are improved, the pressure distribution in the mixing cavity is more uniform and balanced, the air injection efficiency is improved, the mixing effect of air and gas is enhanced, the combustion efficiency is effectively improved, the combustion is more complete, and the CO content in the flue gas is reduced, thereby achieving the effect of energy saving and emission reduction, and ultimately improving the performance of the burner, so that the burner load capacity is enhanced and the energy efficiency is high. The inclined guide surface connects the mixing cavity and the sinking cavity, reduces stress concentration, and enhances the overall structure. The acute angle β is designed in the range of 30° to 60°, so that the inclined guide surface can effectively guide the gas flow, reduce the resistance of the gas on the inclined guide surface, and promote the mixing and diffusion of the gas near the inclined guide surface.

[0010] Furthermore, the connection between the inclined guide surface and the bottom surface of the mixing chamber, and the connection between the inclined guide surface and the sinking chamber are all connected by a circular arc segment transition, and the radius of the circular arc segment is 5 to 25 mm. The use of the circular arc segment transition connection can effectively guide the gas flow, reduce the resistance of the gas at the connection, and enhance the gas mixing effect. The smooth transition design of the circular arc segment can reduce the stress concentration at the connection, improve the structural strength of the connection, and make the overall structure more stable and firm. The circular arc segment with a radius of 5 to 25 mm can provide sufficient curvature to make the stress distribution more uniform and effectively reduce the stress concentration phenomenon at the connection. The edges of the sinking chamber are also set as circular arc chamfers to reduce the sharp parts of the edges and improve the overall safety of the product. The circular arc chamfers can smoothly transition the edges and reduce the resistance during the gas flow in the sinking chamber.

[0011] Furthermore, the sinking cavity is a fan-shaped structure, the central angle α of the sinking cavity is 60° to 180°, the sinking cavity is formed by the bottom surface of the mixing cavity being sunken outward, and the sinking depth of the sinking cavity is 3 to 10 mm. The sinking cavity of the fan-shaped structure can better guide the gas flow and improve the uniformity of gas distribution, so that the gas and air can be fully mixed, and the combustion efficiency is improved. The design of the fan-shaped structure also makes the overall appearance more beautiful, and the angle of the sinking cavity is limited. The angle is selected reasonably to ensure that the sinking cavity has a certain space size, so as to ensure that the gas is fully guided and diffused, and the mixing efficiency is improved. The sinking depth size is designed moderately to ensure the overall structural strength, so that the sinking cavity can provide enough space and time for the airflow to diffuse and mix, thereby improving the stability and mixing efficiency of the airflow.

[0012] Furthermore, the pressure equalizing plate includes a first annular surface, a second annular surface and an inclined surface 1, the first annular surface and the second annular surface are arranged concentrically, the second annular surface is connected to the inner side of the first annular surface through the inclined surface 1, the first annular surface is circumferentially evenly distributed with first pressure equalizing holes, the second annular surface is circumferentially evenly distributed with second pressure equalizing holes, and the inner wall of the second annular surface is provided with a positioning convex portion. The overall structural design is ingenious and reasonable. The concentric circle design of the two annular surfaces can ensure the stability and balance of the overall structure, and the two annular surfaces are connected by the inclined surface 1. The inclined surface 1 can be a straight surface or a curved surface. The smooth transition through the inclined surface 1 helps to reduce the resistance of the gas when flowing through the pressure equalizing plate, so that the gas flow in the mixing chamber is smoother and more efficient. The design of the pressure equalizing holes on the annular surface optimizes The flow path of the gas in the mixing chamber allows the fuel gas and air to be fully mixed in the mixing chamber, better balancing the pressure, making the combustion more complete, improving the combustion efficiency, and improving the overall stability. The first pressure-equalizing hole and the second pressure-equalizing hole are evenly distributed circumferentially, allowing the gas to pass through the pressure-equalizing plate more smoothly, reducing the flow resistance. The size of the first pressure-equalizing hole and the size of the second pressure-equalizing hole can be the same or different, and can be adjusted according to design requirements. The positioning protrusion is an arc-shaped protrusion, and the connection between the positioning protrusion and the inner wall of the pressure-equalizing plate adopts an arc transition connection to optimize the structure and reduce the concentrated stress at the connection between the positioning protrusion and the pressure-equalizing plate. The positioning protrusion can cooperate with the design of the positioning groove in the mixing chamber to facilitate the precise installation and positioning of the pressure-equalizing plate in the mixing chamber. The positioning groove is formed by multiple arc surfaces, and the arc surface design can better guide the gas flow in the sinking chamber and reduce the resistance to the gas flow in the sinking chamber.

[0013] Furthermore, an edge ring is provided on the outer side of the first ring surface, and the edge ring is transitionally connected to the first ring surface through the inclined surface two, a cavity is formed between the inclined surface one, the first ring surface and the inclined surface two, and the cavity is connected to the first pressure-equalizing hole, and the inner side of the second ring surface is inclined downwardly connected with the inclined surface three, and a cavity groove is formed between the second ring surface and the inclined surface three, and the cavity groove is connected to the second pressure-equalizing hole and the cavity, and the bottom end of the inclined surface three is bent toward the inner side of the pressure-equalizing plate to form an abutment portion, and the edge ring can facilitate the support and placement of the pressure-equalizing plate on the fire cover base, thereby improving the placement stability and reliability of the pressure-equalizing plate, and the design of the inclined surface two can transitionally connect the edge ring and the first ring surface, thereby increasing the structural stability and Structural strength, inclined surface two also helps the flow of gas in the mixing chamber, guiding the gas to flow toward the annular surface so that it can smoothly pass through the pressure equalizing hole. A cavity connected to the first pressure equalizing hole is formed between inclined surface one, the first annular surface and inclined surface two to ensure the free flow of gas. The design of inclined surface three improves the overall stability and strength of the pressure equalizing plate. The cooperation between inclined surface three and the second annular surface just forms a cavity groove, which is connected to the second pressure equalizing hole and the cavity, which is more conducive to the smooth flow of gas in the mixing chamber, reducing flow resistance and better balancing internal pressure. Inclined surface two and inclined surface three can be straight surfaces or curved surfaces, which can be adjusted according to design requirements. The design of the abutment portion can enhance the overall structural strength and stability. When the pressure equalizing plate is installed on the base of the fire cover, the abutment portion just abuts against the support on the inner wall of the mixing chamber, which is convenient for actual installation and disassembly and improves the structural stability after installation. The edge ring, the second inclined surface, the first ring surface, the first inclined surface, the second ring surface, the third inclined surface and the abutting portion are an integrally formed structure. The integrally formed structure can ensure the overall structural strength and stability and is also convenient for actual processing and forming.

[0014] Furthermore, a seal is connected to the bottom of the fire cover base, and the bottom surface of the seal is supported on the support frame. The seal is provided with a through hole, and the ejector tube group is inserted into the through hole. The end of the seal connected to the fire cover base is named a sealing end. The sealing end is provided with a notch, so that the sealing end forms a sealing part one and a sealing part two. The sealing part one is located above the notch, and the sealing part two is located below the notch. The sealing end is clamped with the fire cover base through the notch, and the connection between the sealing end and the fire cover base is welded and fixed. The seal is arranged at the outer ring air inlet and the inner ring air inlet of the fire cover base. The air tightness of the connection between the air inlet and the ejector tube assembly can be increased by the seal. The sealing end and the air inlet are connected by a snap-fit ​​connection, and the connection is further welded and fixed, which effectively improves the sealing performance.

[0015] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0016] The present invention is cleverly designed and highly practical. A pressure equalizing plate is provided in the mixing chamber, and the pressure equalizing plate completely covers the mixing chamber, which can well balance the pressure in the mixing chamber, so that the gas and air can be more fully contacted and mixed in the mixing chamber, improve the combustion efficiency, improve the flame uniformity and stability of the burner, make the flame height of the entire outer ring consistent, reduce the backfire phenomenon, and improve the safety of use. At the same time, a sinking cavity is also provided in the mixing chamber, and the pressure loss is reduced by the buffering of the sinking cavity, the gas flow path is optimized, the stability and efficiency of the gas are improved, and the pressure distribution in the mixing chamber is more uniform and balanced, the air injection efficiency is improved, and the mixing effect of air and gas is enhanced, so as to effectively improve the combustion efficiency, make the combustion more complete, and reduce the CO content in the flue gas, so as to achieve the effect of energy saving and emission reduction, and finally improve the performance of the burner, so that the burner load capacity is enhanced and the energy efficiency is high. The outer ring fire cover and the center fire cover in the present application preferably adopt an integrated molding structure, and only one piece of material is needed to manufacture the outer fire cover and the inner fire cover, which saves the material for manufacturing the fire cover assembly and reduces the cost. At the same time, it is convenient to manufacture and is easy to control the overall shape of the fire cover assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of a burner of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the seepage tray in the present invention;

[0020] Figure 3 is a schematic diagram of the cross-sectional structure of the seepage disc of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the support column in the present invention;

[0022] Figure 5 It is a schematic diagram of the placement structure of the pressure equalizing plate in the mixing chamber in the present invention;

[0023] Figure 6 The schematic diagram of the structure of the pressure equalizing plate in the present invention is

[0024] Figure 7 for Figure 6 A schematic diagram of the structure from another perspective;

[0025] Figure 8 It is a schematic diagram of the planar structure of the pressure equalizing plate in the present invention;

[0026] Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure of AA;

[0027] Fig.10 It is a structural schematic diagram of the fire cover assembly of the present invention;

[0028] Fig.11 It is a schematic diagram of the position distribution structure of the sinking cavity in the mixing cavity in the present invention;

[0029] Fig.12 Schematic diagram of the position distribution structure of the sealing member on the fire cover base in the present invention

[0030] Fig.13 It is a structural schematic diagram of the fire cover base of the present invention;

[0031] Fig.14 It is a schematic diagram of the cross-sectional structure of the fire cover base of the present invention;

[0032] Fig.15 It is a schematic diagram of the position distribution structure of the air inlet hole group on the fire cover base in the present invention;

[0033] Fig.16 It is a schematic diagram of the structure of the sealing member in the present invention;

[0034] Fig.17 It is a schematic diagram of the planar structure of the sealing member in the present invention;

[0035] Fig.18 for Fig.17 Schematic diagram of the cross-sectional structure of the middle BB;

[0036] Fig.19 This is a diagram showing an embodiment of the invention in which the outer ring fire cover and the center fire cover are integrally formed.

[0037] In the figure, 1-fire cover assembly; 2-outer ring fire cover; 3-center fire cover; 4-fire cover base; 5-support frame; 6-injection tube group; 7-mixing chamber; 8-equalizing plate; 9-support column; 10-threaded hole; 11-liquid tray; 12-reinforcement part; 13-outer ring air inlet; 14-inner ring air inlet; 15-inclined guide surface; 16-arc segment; 17-first annular surface; 18-second annular surface; 19-inclined surface 1; 20-first equalizing hole ; 21-second pressure equalizing hole; 22-positioning convex part; 23-edge ring; 24-inclined surface two; 25-cavity; 26-inclined surface three; 27-cavity groove; 28-abutment part; 29-seal 29; 30-through hole; 31-sealing end; 32-slot; 33-sealing part one; 34-sealing part two; 35-furnace head; 36-positioning groove; 37-threaded part; 38-sunken cavity; 39-arc chamfer; 40-convex part. DETAILED DESCRIPTION

[0038] like Figures 1 to 19As shown, a burner of the present invention includes a fire cover assembly 1 and a burner head 35. The fire cover assembly 1 includes an outer ring fire cover 2, a central fire cover 3 and a fire cover base 4. The fire cover base 4 is provided with an air inlet group. The burner head 35 includes a support frame 5 and an ejector tube group 6. The ejector tube group 6 is provided on the support frame 5. A mixing chamber 7 is provided in the outer ring fire cover 2, so a pressure equalizing plate 8 is provided in the mixing chamber 7, and the pressure equalizing plate 8 covers the entire mixing chamber 7. The present application provides a pressure equalizing plate 8 in the mixing chamber 7, and the pressure equalizing plate 8 completely covers the mixing chamber 7, which can well balance the pressure in the mixing chamber 7, so that the gas and air are more fully contacted and mixed in the mixing chamber 7, improve the combustion efficiency, improve the flame uniformity and stability of the burner, make the flame height of the entire outer ring consistent, reduce the backfire phenomenon, and improve the safety of use. The corners of the pressure equalizing plate 8 are provided with arc chamfers 39. The design of the arc chamfers 39 can improve the aesthetics and reduce the risk of scratches. The arc chamfers 39 can effectively disperse stress and improve the overall structural strength. A convex portion 40 is also provided in the mixing chamber 7, and the cross section of the convex portion 40 gradually decreases from the bottom end toward the top end. The convex portion 40 can change the flow path of the airflow in the mixing chamber 7 and enhance the mixing effect. The outer ring fire cover 2 and the central fire cover 3 of the present invention can be a split structure, or the outer ring fire cover 2 and the central fire cover 3 can be designed as an integrated structure. The integrated design can facilitate actual processing, reduce processing costs, and is also convenient for controlling the overall shape and size of the fire cover assembly 1, optimizing combustion performance, and the integrated molding can also ensure the overall structural firmness and structural strength.

[0039] A support column 9 is provided on the support frame 5, and the bottom surface of the fire cover base 4 protrudes upward to form a positioning recessed hole (not shown in the figure). The support column 9 matches the positioning recessed hole, and the top end of the support column 9 is clamped and limited in the positioning recessed hole. The fire cover assembly 1 is supported by the support column 9 so that the fire cover assembly 1 can be placed stably. The structural design is ingenious and reasonable. The design of the support column 9 can improve the placement stability of the fire cover assembly 1, and it is convenient to disassemble and assemble, and easy to clean. During actual installation, the support column 9 cooperates with the positioning recessed hole to achieve precise positioning of the fire cover assembly 1 on the burner head 35, reducing the difficulty of installation. The design also limits the axial rotation of the fire cover assembly 1, so that the fire cover assembly 1 will not tip over and has high stability. The support column 9 is provided with a threaded portion 37, and the support frame 5 is provided with a threaded hole 10. The threaded portion 37 matches the threaded hole 10, and the threaded portion 37 is screwed into the threaded hole 10 to realize the threaded screw connection between the support column 9 and the support frame 5, thereby ensuring the firmness of the connection between the support column 9 and the support frame 5. The support column 9 can be easily assembled and disassembled, and can be used at any time after assembly. It is flexible, convenient, and highly practical.

[0040] A liquid collecting pan 11 is arranged on the central fire cover 3. The liquid collecting pan 11 is a bowl-shaped structure with a larger upper part and a smaller lower part. The liquid collecting pan 11 is welded or riveted to the central fire cover 3. The peripheral wall of the liquid collecting pan 11 is recessed inward to form a reinforcement portion 12. The central fire outlet on the central fire cover 3 is located below the projection of the liquid collecting pan 11. The structure is novel. The liquid collecting pan 11 is arranged on the central fire cover 3 to collect liquid droplets dripping from the bottom of the pointed bottom pot to prevent the liquid droplets from entering the fire outlet and causing blockage. The waste liquid is also convenient to clean, which improves the reliability of the central fire cover 3. The liquid collecting pan 11 and the central fire cover 3 are welded or riveted. The welding fixation ensures the firmness of the connection, so that the two are not easy to loosen automatically. The riveting fixation can reduce the abnormalities caused by thermal expansion and contraction. The design of the reinforcement portion 12 can improve the structural strength of the liquid collecting pan 11, which is not easy to deform at high temperatures and has a long service life.

[0041] A sinking cavity 38 is provided in the mixing cavity 7, and the air inlet hole group includes an outer ring air inlet 13 and an inner ring air inlet 14. The outer ring air inlet 13 is located in the sinking cavity 38. The sinking cavity 38 is transitionally connected to the mixing cavity 7 through an inclined guide surface 15. The acute angle β formed by the inclined guide surface 15 and the horizontal plane is 30° to 60°. A sinking cavity 38 is provided in the mixing cavity 7. The buffering of the sinking cavity 38 reduces the pressure loss, optimizes the gas flow path, improves the stability and efficiency of the gas, makes the pressure distribution in the mixing cavity 7 more uniform and balanced, improves the air injection efficiency, and enhances the air The mixing effect of gas and fuel gas effectively improves the combustion efficiency, makes the combustion more complete, reduces the CO content in the flue gas, thereby achieving the effect of energy saving and emission reduction, and ultimately improves the performance of the burner, so that the burner load capacity is enhanced and the energy efficiency is high. The inclined guide surface 15 connects the mixing chamber 7 and the sinking chamber 38, reduces the stress concentration phenomenon, and enhances the overall structure. The acute angle β is designed in the range of 30° to 60°, so that the inclined guide surface 15 can effectively guide the flow of fuel gas, reduce the resistance of the fuel gas on the inclined guide surface 15, and promote the mixing and diffusion of the gas near the inclined guide surface 15.

[0042] The connection between the inclined guide surface 15 and the bottom surface of the mixing chamber 7 and the connection between the inclined guide surface 15 and the sinking chamber 38 are both transitionally connected through the arc segment 16. The radius of the arc segment 16 is 5 to 25 mm. The transitional connection using the arc segment 16 can effectively guide the gas flow, reduce the resistance of the gas at the connection, and enhance the gas mixing effect. The smooth transition design of the arc segment 16 can reduce the stress concentration at the connection, improve the structural strength of the connection, and make the overall structure more stable and firm. The arc segment 16 with a radius of 5 to 25 mm can provide sufficient curvature to make the stress distribution more uniform and effectively reduce the stress concentration phenomenon at the connection. The edges of the sinking chamber 38 are also set as arc chamfers 39 to reduce the sharp parts of the edges and improve the overall safety of the product. The arc chamfers 39 can smoothly transition the edges and reduce the resistance of the gas flow in the sinking chamber 38.

[0043] The sinking cavity 38 is a fan-shaped structure, and the central angle α of the sinking cavity 38 is 60° to 180°. The sinking cavity 38 is formed by the bottom surface of the mixing cavity 7 being recessed outward, and the sinking depth of the sinking cavity 38 is 3 to 10 mm. The sinking cavity 38 with a fan-shaped structure can better guide the gas flow and improve the uniformity of gas distribution, so that the gas and air can be fully mixed, and the combustion efficiency is improved. The design of the fan-shaped structure also makes the overall appearance more beautiful, and the angle of the sinking cavity 38 is limited. The angle is selected reasonably to ensure that the sinking cavity 38 has a certain space size, so that the gas can be fully guided and diffused, and the mixing efficiency can be improved. The sinking depth size is designed moderately to ensure the overall structural strength, so that the sinking cavity 38 can provide enough space and time for the airflow to diffuse and mix, thereby improving the stability and mixing efficiency of the airflow.

[0044] The pressure equalizing plate 8 includes a first annular surface 17, a second annular surface 18 and an inclined surface 19. The first annular surface 17 and the second annular surface 18 are arranged concentrically. The second annular surface 18 is connected to the inner side of the first annular surface 17 through the inclined surface 19. The first annular surface 17 is provided with first pressure equalizing holes 20 evenly distributed circumferentially. The second annular surface 18 is provided with second pressure equalizing holes 21 evenly distributed circumferentially. A positioning convex portion 22 is provided on the inner side wall of the second annular surface 18. The overall structural design is ingenious and reasonable. The concentric circle design of the two annular surfaces can ensure the stability and balance of the overall structure. The two annular surfaces are connected by the inclined surface 19. The inclined surface 19 can be a straight surface or a curved surface. The smooth transition through the inclined surface 19 helps to reduce the resistance of the gas when flowing through the pressure equalizing plate 8, so that the gas flow in the mixing chamber 7 is smoother and more efficient. The design of the pressure equalizing holes on the annular surface, The flow path of the gas in the mixing chamber 7 is optimized, so that the gas and air are fully mixed in the mixing chamber 7, the pressure is better balanced, the combustion is more complete, the combustion efficiency is improved, and the overall stability is improved. The first pressure equalizing hole 20 and the second pressure equalizing hole 21 are evenly distributed circumferentially, so that the gas can pass through the pressure equalizing plate 8 more smoothly, reducing the flow resistance. The size of the first pressure equalizing hole 20 and the size of the second pressure equalizing hole 21 can be the same or different, and can be adjusted according to design requirements. The positioning protrusion 22 is an arc-shaped protrusion 40, and the connection between the positioning protrusion 22 and the inner wall of the pressure equalizing plate 8 adopts an arc transition connection to optimize the structure and reduce the concentrated stress at the connection between the positioning protrusion 22 and the pressure equalizing plate 8. The positioning protrusion 22 can cooperate with the design of the positioning groove 36 in the mixing chamber 7, so as to accurately install and position the pressure equalizing plate 8 in the mixing chamber 7. The positioning groove 36 is formed by a plurality of arc surfaces, and the arc surface design can better guide the gas flow in the sinking chamber 38 and reduce the resistance of the gas flow in the sinking chamber 38.

[0045] An edge ring 23 is arranged on the outer side of the first annular surface 17, and the edge ring 23 is transitionally connected to the first annular surface 17 through the inclined surface 24. A cavity 25 is formed between the inclined surface 19, the first annular surface 17 and the inclined surface 24, and the cavity 25 is connected to the first pressure-equalizing hole 20. The inner side of the second annular surface 18 is connected to the inclined surface 3 26 which is inclined downward. A cavity groove 27 is formed between the second annular surface 18 and the inclined surface 3 26, and the cavity groove 27 is connected to the second pressure-equalizing hole 21 and the cavity 25. The bottom end of the inclined surface 3 26 is bent toward the inner side of the pressure-equalizing plate 8 to form an abutment portion 28. The edge ring 23 can facilitate the support and placement of the pressure-equalizing plate 8 on the fire cover base 4, thereby improving the placement stability and reliability of the pressure-equalizing plate 8. The design of the inclined surface 24 can transitionally connect the edge ring 23 and the first annular surface 17. Increase structural stability and strength. Inclined surface 24 also helps the gas flow in the mixing chamber 7, guiding the gas to flow toward the annular surface so as to smoothly pass through the equalizing hole. Inclined surface 19, the first annular surface 17 and inclined surface 24 form a cavity 25 connected to the first equalizing hole 20 to ensure the free flow of gas. The design of inclined surface 3 26 improves the overall stability and strength of the equalizing plate 8. Inclined surface 3 26 and the second annular surface 18 form a cavity 27. The cavity 27 is connected to the second equalizing hole 21 and the cavity 25, which is more conducive to the smooth flow of gas in the mixing chamber 7, reducing flow resistance and better balancing internal pressure. Inclined surface 24 and inclined surface 3 26 can be straight or curved, and can be adjusted according to design requirements. The design of the abutment 28 can enhance the overall structural strength and stability. When the equalizing plate 8 is installed on the fire cover base 4, the abutment 28 just abuts against the inner wall of the mixing chamber 7, which is convenient for actual installation and disassembly and improves the structural stability after installation. The edge ring 23, the second inclined surface 24, the first ring surface 17, the first inclined surface 19, the second ring surface 18, the third inclined surface 26 and the abutting portion 28 are an integrally formed structure, which can ensure the overall structural strength and stability and is also convenient for actual processing and forming.

[0046] The bottom of the fire cover base 4 is connected with a seal 29, the bottom surface of the seal 29 is supported on the support frame 5, and the support frame 5 supports the fire cover assembly 1 through the seal 29 and the support column 9, so that the placement of the fire cover assembly 1 is more stable and reliable. The seal 29 is arranged at the outer ring air inlet 13 and the inner ring air inlet 14. The seal 29 is provided with a through hole, which is connected to the corresponding air inlet, and the ejector tube group 6 is inserted into the through hole. The end of the seal 29 connected to the fire cover base 4 is named as a sealing end 31, and the sealing end 31 is provided with a notch 32, so that the sealing end 31 forms a sealing part 1 33 and a sealing part 2 34, the sealing part 1 33 is located above the notch 32, the sealing part 2 34 is located below the notch 32, the sealing end 31 is clamped with the fire cover base 4 through the notch 32, the sealing end 31 is clamped at the corresponding air inlet, and the connection between the sealing end 31 and the fire cover base 4 is welded and fixed, the sealing member 29 is arranged at the outer ring air inlet 13 and the inner ring air inlet 14 of the fire cover base 4, the air tightness of the connection between the air inlet and the ejector tube group 6 can be increased by the sealing member 29, the sealing end 31 and the air inlet are connected by a clamping connection, and the connection is further welded and fixed, which effectively improves the sealing performance. The sealing member 29 is fixedly connected to the fire cover base 4, so that the sealing member 29 is sealed to the air inlet of the fire cover base 4, which can solve the problem of gas leakage between the ejector tube group 6 and the air inlet of the fire cover base 4. The diameter of the sealing part 1 33 is not less than the diameter of the sealing part 2 34 , which increases the contact area between the sealing part 1 33 and the fire cover base 4 , improves the stability of the sealing end 31 in the air inlet, and makes the sealing part 29 not easy to fall off.

[0047] The present invention is cleverly designed and highly practical. A pressure equalizing plate 8 is arranged in the mixing chamber 7, and the pressure equalizing plate 8 completely covers the mixing chamber 7, which can well balance the pressure in the mixing chamber 7, so that the gas and air are more fully contacted and mixed in the mixing chamber 7, improve the combustion efficiency, improve the flame uniformity and stability of the burner, make the flame height of the entire outer ring consistent, reduce the backfire phenomenon, and improve the safety of use. At the same time, a sinking cavity 38 is also arranged in the mixing chamber 7, and the pressure loss is reduced by the buffering of the sinking cavity 38, the gas flow path is optimized, the stability and efficiency of the gas are improved, and the pressure distribution in the mixing chamber 7 is more uniform and balanced, the air injection efficiency is improved, and the mixing effect of air and gas is enhanced, so that the combustion efficiency is effectively improved, the combustion is more complete, and the CO content in the flue gas is reduced, so as to achieve the effect of energy saving and emission reduction, and finally improve the performance of the burner, so that the burner load capacity is enhanced and the energy efficiency is high. The outer ring fire cover 2 and the central fire cover 3 in the present application preferably adopt an integrated molding structure, and only one piece of material is needed to manufacture the outer fire cover and the inner fire cover, saving the material for manufacturing the fire cover assembly, reducing the cost, and conveniently manufacturing, and conveniently controlling the overall shape of the fire cover assembly 1.

[0048] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A burner comprising A fire cover assembly, the fire cover assembly comprising an outer ring fire cover, a central fire cover and a fire cover base, the fire cover base being provided with an air inlet hole group; A furnace head, the furnace head comprising a support frame and an ejector tube group, the ejector tube group being arranged on the support frame; Features: A mixing chamber is provided in the outer ring fire cover, so a pressure equalizing plate is provided in the mixing chamber, and the pressure equalizing plate covers the entire mixing chamber.

2. A burner according to claim 1, characterized in that: A support column is provided on the support frame, and the bottom surface of the fire cover base protrudes upward to form a positioning recessed hole. The support column matches the positioning recessed hole, and the top end of the support column is clamped and limited in the positioning recessed hole. The fire cover assembly is supported by the support column so that the fire cover assembly can be placed stably.

3. A burner according to claim 2, characterized in that: The support column is provided with a threaded portion, and the support frame is provided with a threaded hole. The threaded portion matches the threaded hole, and the threaded portion is screwed into the threaded hole to achieve threaded connection between the support column and the support frame.

4. A burner according to claim 1, characterized in that: The central fire cover is provided with a liquid receiving pan, which is welded or riveted to the central fire cover. The peripheral wall of the liquid receiving pan is inwardly recessed to form a reinforcement portion, and the central fire outlet is located below the projection of the liquid receiving pan.

5. A burner according to claim 1, characterized in that: A sinking cavity is provided in the mixing cavity, and the air inlet hole group includes an outer ring air inlet and an inner ring air inlet. The outer ring air inlet is located in the sinking cavity. The sinking cavity is transitionally connected to the mixing cavity through an inclined guide surface, and the acute angle β formed by the inclined guide surface and the horizontal plane is 30° to 60°.

6. A burner according to claim 5, characterized in that: The connection between the inclined guide surface and the bottom surface of the mixing chamber and the connection between the inclined guide surface and the sinking chamber are both connected through a circular arc segment transition, and the radius of the circular arc segment is 5 to 25 mm.

7. A burner according to claim 5, characterized in that: The sinking cavity is a fan-shaped structure, the central angle α of the sinking cavity is 60° to 180°, the sinking cavity is formed by the bottom surface of the mixing cavity being recessed outwards, and the sinking depth of the sinking cavity is 3 to 10 mm.

8. A burner according to claim 1, characterized in that: The pressure equalizing plate includes a first annular surface, a second annular surface and an inclined surface one. The first annular surface and the second annular surface are arranged concentrically. The second annular surface is connected to the inner side of the first annular surface through the inclined surface one. The first annular surface is provided with first pressure equalizing holes evenly distributed circumferentially, the second annular surface is provided with second pressure equalizing holes evenly distributed circumferentially, and a positioning protrusion is provided on the inner side wall of the second annular surface.

9. A burner according to claim 8, characterized in that: An edge ring is provided on the outer side of the first annular surface, and the edge ring is transitionally connected to the first annular surface through an inclined surface two. A cavity is formed between the inclined surface one, the first annular surface and the inclined surface two, and the cavity is connected to the first pressure equalizing hole. An inclined surface three is connected to the inner side of the second annular surface, and a cavity groove is formed between the second annular surface and the inclined surface three. The cavity groove is connected to the second pressure equalizing hole and the cavity. The bottom end of the inclined surface three is bent toward the inner side of the pressure equalizing plate to form an abutment portion.

10. A burner according to claim 1, characterized in that: A sealing member is connected to the bottom of the fire cover base, and the bottom surface of the sealing member is supported on the support frame. The sealing member is provided with a through hole, and the ejector tube group is inserted into the through hole. The end of the sealing member connected to the fire cover base is named a sealing end. The sealing end is provided with a notch so that the sealing end forms a sealing portion one and a sealing portion two. The sealing portion one is located above the notch, and the sealing portion two is located below the notch. The sealing end is clamped with the fire cover base through the notch, and the connection between the sealing end and the fire cover base is welded and fixed.

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