CN110748886B

CN110748886B - Burner

Info

Publication number: CN110748886B
Application number: CN201911128170.7A
Authority: CN
Inventors: 程志刚; 王元聪; 徐洪辉
Original assignee: Guangdong Hechuangda Electric Appliance Technology Co ltd
Current assignee: Guangdong Hechuangda Electric Appliance Technology Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2024-06-25
Anticipated expiration: 2039-11-18
Also published as: CN110748886A

Abstract

The invention discloses a burner, wherein at least two outer ring gas injection nozzles are fixed on a base; two corresponding independent lower concave cavities and an outer ring gas mixing cavity are arranged on the bottom ring seat, a pipeline hole is arranged in the middle of the outer side wall of each independent lower concave cavity, and an outer ring gas injection nozzle is aligned to the pipeline hole; an inner insert is fixed on the inner side wall of each independent lower concave cavity; the inner ring member is sleeved on the outer wall surface of the inner convex ring wall, the top of the inner ring member is extended with an annular convex edge, the annular convex edge covers part of the outer ring gas mixing cavity and the middle part of the independent lower concave cavity, the two ends of the uncovered independent lower concave cavity are provided with upper air holes, the gas enters the independent lower concave cavity and then is distributed to the outer ring gas mixing cavity, the gas in the outer ring gas mixing cavity enters the surrounding mixing cavity through a flow limiting channel, and finally the gas is sprayed out from an outer ring fire hole group at the top for combustion; the product distributes fuel gas in the outer ring fuel gas mixing cavity more fully and uniformly through at least two independent lower concave cavities, and the combustion firepower is distributed uniformly.

Description

Burner

Technical Field

The invention relates to a device of a small household gas furnace, in particular to a burner.

Background

The outer ring of the existing gas furnace combustion furnace head is only connected with one gas inlet pipe and is connected to the bottom of one side of the furnace head, gas flows around through the gas self-pressure after entering the outer ring mixing cavity, the gas rises after entering, the head-tail pressure of the outer ring mixing cavity is inconsistent, flame height of the combustion ring surface is inconsistent, and the fire distribution is uneven.

Disclosure of Invention

In order to solve the technical problems, the invention provides the burner which is reasonable in structure, at least has double air inlet and can uniformly distribute gas for combustion.

The technical scheme for solving the technical problems is as follows:

The utility model provides a combustor, includes base, ignition needle, its characterized in that: at least two outer ring gas injection nozzles are fixed on the base; a bottom ring seat is fixed on the base, and a central burner is fixed in the middle of the bottom ring seat; the top of the bottom ring seat is provided with an outer convex ring wall and an inner convex ring wall which extend upwards, a surrounding type central upper air hole is formed between the outer ring wall and the inner convex ring wall of the central burner, an annular outer ring gas mixing cavity is formed between the outer convex ring wall and the inner convex ring wall, at least two independent lower concave cavities are arranged on the outer ring gas mixing cavity, and each independent lower concave cavity comprises an inner side wall, an outer side wall and a cavity bottom wall; a fuel gas guide wall is arranged between the cavity bottom wall of the independent lower concave cavity and the outer convex annular wall; The inner side wall comprises an arc-shaped inner side wall in the middle part and plane inner side walls at two ends; a semicircular boss is formed between the outer side wall of the independent lower concave cavity and the outer convex annular wall, and the outer side wall is arranged on the inner side of the semicircular boss; a bottom annular wall of the outer ring gas mixing cavity is formed between the plane inner side walls at the two ends of the two adjacent independent lower concave cavities, the bottom annular wall and the semi-circle-lack boss are the rest parts of the bottom wall of the outer ring gas mixing cavity, which are not concave, and the bottom annular wall and the semi-circle-lack boss are convex relative to the independent lower concave cavities; the middle part of the outer side wall of each independent lower concave cavity is provided with a pipeline hole vertical to the outer side wall, the outer ring gas injection nozzle is aligned to the outer hole opening of the pipeline hole, and an air inlet gap is formed between the outer hole opening of the pipeline hole and the outer ring gas injection nozzle; An inner insert is fixed on the inner side wall of each independent lower concave cavity, and an annular gas diversion throat part and an annular gas expansion part are formed between the inner insert and the outer side wall of the inner hole edge periphery of the pipeline hole; the outer wall surface of the inner convex annular wall is sleeved with an inner annular part, the inner annular part is integrally arranged in the outer annular gas mixing cavity, an annular convex edge transversely extends outwards from the outer wall of the top of the inner annular part, the annular convex edge covers part of the outer annular gas mixing cavity, the middle part of an independent lower concave cavity is covered, and upper air holes are formed at two ends of the uncovered independent lower concave cavity; an outer ring fire cover is fixedly connected between the outer convex annular wall and the inner convex annular wall together, the outer ring fire cover is integrally formed, the outer ring fire cover comprises a top annular wall, the outer side of the top annular wall downwards extends to form a fire cover outer annular wall, the inner side of the top annular wall downwards extends to form a fire cover inner annular wall, a surrounding mixing cavity is formed between the fire cover outer annular wall and the fire cover inner annular wall, the top annular wall is provided with an outer ring fire hole set, and the outer ring fire hole set is communicated with the surrounding mixing cavity; The fire cover outer annular wall is fixedly connected with the outer convex annular wall, and the fire cover inner annular wall is fixedly connected with the inner convex annular wall; a current limiting channel is formed between the edge of the annular convex eave and the annular wall of the top of the fire cover; the fuel gas is injected into the annular fuel gas diversion throat through the outer annular fuel gas injection nozzle and the pipeline holes and then flows to the annular fuel gas expansion part, then the whole independent lower concave cavity is fully distributed, the independent lower concave cavity is distributed to the outer annular fuel gas mixing cavity, the fuel gas of the outer annular fuel gas mixing cavity enters the surrounding mixing cavity through the flow limiting channel, and finally the fuel gas is sprayed out of the outer annular fire hole group at the top for combustion; a gas flow limiting gap is formed between the top of the semicircular boss and the annular eave; the opposite reverse surfaces of the independent lower concave cavities are raised parts, and two adjacent raised parts and the bottom annular wall form a transverse air inlet notch part; The base is connected with the bottom ring base, the air entering notch part is changed into an air inlet hole, and the outside air enters from the air inlet hole and then ascends from the central air hole to supplement oxygen for central combustion and outer ring combustion.

The preferred technical scheme is as follows: the inner inserts are fixedly connected to the bottom of the inner ring, a mounting notch part is formed between the bottom of the inner ring and two adjacent inner inserts, and when the inner inserts are embedded into the independent lower concave cavities, the bottom of the inner ring of the mounting notch part is fixedly connected with the inner side of the bottom ring wall; the outer wall surface of the inner insert is a conical outer wall surface, a flat circular plane is arranged in the middle of the conical outer wall surface, and the circular plane is concentrically aligned with the pipeline hole and is parallel to the wall surface of the outer side wall; an annular gas diversion throat part is formed between the circular plane and the wall surface of the outer side wall, and a conical gas expansion part is formed between the conical outer wall surface and the wall surface of the outer side wall; the fuel gas guide wall of the independent lower concave cavity is arc-shaped; the middle part of the inner edge of the top of the semi-circle-lack boss is provided with a bulge, a gas converging groove is formed between the bulge and the outer convex annular wall, and a gas flow limiting gap is formed between the top of the bulge and the annular convex eave.

The preferred technical scheme is as follows: the inner ring piece comprises an inner convex ring wall, an outer convex ring wall and a bottom ring wall, and surrounding grooves are formed among the inner convex ring wall, the outer convex ring wall and the bottom ring wall; the outer side of the top of the outer convex annular wall is extended with an annular convex eave; the inner convex annular wall is sleeved on the outer wall surface of the inner convex annular wall.

The preferred technical scheme is as follows: the gas wind shields are fixed on two sides of the outer hole of the pipeline hole on the back surface of the bottom ring seat, and positioning bayonets are arranged between the gas wind shields on two sides.

The preferred technical scheme is as follows: the central burner comprises a first central fire cover, a second central fire cover, a double-layer gas mixing head and two central gas injection pipes; the double-layer gas mixing head comprises an outer annular wall, an inner annular wall and an annular bottom wall, an annular outer gas mixing cavity is arranged between the outer annular wall and the inner annular wall, and the center of the inner annular wall is an inner gas mixing cavity; the top of the first central fire cover is provided with a central combustion fire dividing hole group; the side wall of the second central fire cover is provided with a central side combustion fire dividing hole group, and a hollow short pipe extends downwards from the middle; the first central fire cover is laminated on the second central fire cover and fixedly connected with the second central fire cover; the outer wall of the second central fire cover is fixedly connected to the top of the corresponding outer annular wall, the hollow short pipe is inserted into the inner annular wall and communicated with the internal combustion gas mixing cavity, and the external combustion gas mixing cavity is communicated with the central side combustion fire dividing hole group; the outer bottom of the bottom ring seat is fixedly provided with two central gas injection pipes which are respectively arranged at the two air inlet notch parts, one of the two central gas injection pipes is connected and communicated with the internal combustion gas mixing cavity, and the other central gas injection pipe is connected and communicated with the external combustion gas mixing cavity.

The preferred technical scheme is as follows: the two central gas injection pipes comprise a first gas injection pipe and a second gas injection pipe, the internal gas mixing cavity is communicated with the first gas injection pipe in a connecting way, and the external gas mixing cavity is communicated with the second gas injection pipe in a connecting way; the central side combustion fire dividing hole group, the outer fuel gas mixing cavity and the fuel gas injection pipe II are communicated; the central combustion fire dividing hole group, the hollow short pipe, the internal combustion gas mixing cavity and the first gas injection pipe are communicated; the first gas injection pipe and the second gas injection pipe are fixed on the back surface of the bottom ring seat, and part pipe sections of the first gas injection pipe and the second gas injection pipe and the injection orifice are arranged at the two air inlet notch parts; the base is fixedly provided with a first central combustion injection nozzle and a second central combustion injection nozzle; the first central combustion injection nozzle is aligned with an injection orifice of the first gas injection pipe, and an air supplement surrounding gap is formed between the injection orifice and the first central combustion injection nozzle; the second central combustion injection nozzle is aligned with an injection orifice of the second gas injection pipe, and an air supplement surrounding gap is formed between the injection orifice and the second central combustion injection nozzle.

The preferred technical scheme is as follows: the middle of the air inlet notch part of the injection orifice of the first gas injection pipe and the second gas injection pipe is downwards extended with left, right and rear side connected gas windshields which semi-surround the central combustion injection nozzle; the first gas injection pipe and the second gas injection pipe are internally provided with a venturi tube; a positioning bayonet is arranged between the left wall and the right wall of the gas windshield; the tops of the first central combustion injection nozzle and the second central combustion injection nozzle are respectively fixed with a positioning column, and the positioning columns are inserted into the positioning bayonets for positioning after the base is connected with the bottom ring seat.

The preferred technical scheme is as follows: the first gas injection pipe and the second gas injection pipe are respectively arranged in a tilting manner with the corresponding first central combustion injection nozzle and second central combustion injection nozzle, the tilting angles are consistent, and the tilting angle is any degree between 5 degrees and 20 degrees; the first central combustion injection nozzle and the second central combustion injection nozzle comprise a central nozzle seat and a central gas injection nozzle, a central gas input channel is arranged in the central nozzle seat, the central gas injection nozzle is fixedly connected to an outlet of the central gas input channel, and an inlet of the central gas input channel is used for a gas pipe to be connected with input gas; the central nozzle seat of the first central combustion injection nozzle is connected with a central gas inlet pipe.

The preferred technical scheme is as follows: the outer ring gas injection nozzle comprises an outer ring nozzle seat and an outer ring gas injection nozzle, an outer ring gas input channel is arranged in the outer ring nozzle seat, the outer ring gas injection nozzle is fixedly connected to an outer ring gas input channel outlet, an outer ring gas inlet pipe is fixedly connected to an outer ring gas input channel inlet, and the two outer ring gas injection nozzles are connected and communicated through the outer ring gas inlet pipe; the outer ring gas injection nozzle is arranged in a tilting manner; the pipeline Kong Angqing is arranged and is consistent with the upward inclination angle of the outer ring gas injection nozzle, and the upward inclination angle is any degree between 5 degrees and 20 degrees; the top of the outer ring gas injection nozzle is fixedly provided with a positioning column, and the positioning column is inserted into the positioning bayonet for positioning after the base is connected with the bottom ring seat; the outer ring gas inlet pipe can be communicated with or not communicated with the central gas inlet pipe.

The preferred technical scheme is as follows: a flame monitoring needle and an ignition needle are longitudinally connected and fixed in the middle of the base in a penetrating way; the outer annular wall of the double-layer gas mixing head extends to form an annular flange, a flame monitoring needle positioning semicircular notch and an ignition needle positioning semicircular notch are arranged on the annular flange, and the flame monitoring needle positioning semicircular notch and the ignition needle positioning semicircular notch are in one-to-one correspondence with the flame monitoring needle and the ignition needle.

The burner has the beneficial effects that: the product is characterized in that at least two independent lower concave cavities are arranged on an outer ring gas mixing cavity, a pipeline hole perpendicular to the outer side wall is arranged in the middle of the outer side wall of each independent lower concave cavity, an outer ring gas injection nozzle is aligned to the pipeline hole, and gas flows and disperses towards the upper, left and right sides of the independent lower concave cavities after entering the pipeline hole; the inner ring piece is sleeved on the outer wall surface of the inner convex ring wall, the inner ring piece is integrally arranged in the outer ring gas mixing cavity, the outer wall of the top of the inner ring piece transversely extends outwards to form an annular convex edge, the annular convex edge covers part of the outer ring gas mixing cavity, the middle part of the independent lower concave cavity is covered, and upper air holes are formed at two ends of the uncovered independent lower concave cavity; an outer ring fire cover is fixedly connected between the outer convex annular wall and the inner convex annular wall together, and a current limiting channel is formed between the edge of the annular convex eave and the top annular wall of the fire cover;

When the gas burner is used, gas is injected through the outer ring gas injection nozzle and the pipeline holes and enters the annular gas expansion part through the annular gas diversion throat, then the whole independent lower concave cavity is fully distributed, the independent lower concave cavity is distributed to the outer ring gas mixing cavity, the gas in the outer ring gas mixing cavity enters the surrounding mixing cavity through the flow limiting channel, and finally the gas is sprayed and combusted at the outer ring fire hole group at the top; the product has the advantages of full and uniform gas distribution and uniform combustion firepower arrangement.

Drawings

Fig. 1, 2, 3, 4 and 5 are perspective views of the product of the present invention;

FIG. 6 is a top view of the product of the present invention;

FIG. 7 is a perspective view of the product base and bottom ring base connection of the present invention;

FIG. 8 is a perspective view of the connection of the inner ring member to the bottom ring seat of the product of the present invention;

FIGS. 9 and 10 are cross-sectional views of the product of the present invention;

FIG. 11 is a cross-sectional view of the bottom ring seat of the product of the present invention;

FIG. 12 is a perspective view of a bottom ring seat of the product of the present invention;

FIG. 13 is an exploded view of the product of the present invention;

FIGS. 14 and 15 are perspective views of the inner ring of the product of the present invention;

Fig. 16 and 17 are perspective views of the bottom ring seat of the product of the present invention.

Base 1, outer annular gas injection head 11, bottom annular seat 2, center burner 3, outer convex annular wall 21, inner convex annular wall 22, center upper air hole 4, outer annular gas mixing chamber 23, independent lower cavity 24, inner side wall 241, outer side wall 242, chamber bottom wall 243, gas guide wall 244, arc inner side wall 2411, planar inner side wall 2412, semi-circular boss 245, bottom annular wall 246, duct hole 25, air intake gap 26, insert 5, annular gas distribution throat 247, annular gas expansion 248, inner annular member 27, annular ledge 271, upper air hole 28, outer annular flame cover 29, top annular wall 291, flame cover outer annular wall 292, flame cover inner annular wall 293, outer annular flame hole 2911, surrounding mixing chamber 294, flow restricting channel 295, gas flow restricting gap 272, bump 6, air intake gap 61, mounting gap 51, conical outer wall 52, circular plane 53, boss 2451 gas converging groove 2452, inner convex annular wall 2701, outer convex annular wall 2702, bottom annular wall 2703 surrounding groove 270, gas weather plate 62, first center fire cover 31, second center fire cover 32, double-layer gas mixing head 33, two center gas injection pipes 34, first gas injection pipe 341, second gas injection pipe 342, outer annular wall 331, inner annular wall 332, annular bottom wall 333, annular outer gas mixing chamber 334, inner gas mixing chamber 335, center combustion flame distributing hole group 311, center side combustion flame distributing hole group 321, hollow nipple 322, air supplementing surrounding gap 71, first center combustion injection nozzle 7, second center combustion injection nozzle 8, positioning bayonet 63, positioning post 64, center nozzle seat 81, center gas injection nozzle 82, center gas input channel 83, center gas intake pipe 72, outer ring nozzle seat 111, outer ring gas nozzle 112, outer ring gas input channel 113, the flame-monitoring device comprises an outer ring gas inlet pipe 114, a flame-monitoring needle 101, an ignition needle 102, an annular flange 301, a flame-monitoring needle positioning semicircular notch 302 and an ignition needle positioning semicircular notch 303.

Detailed Description

The utility model provides a combustor, includes base 1, ignition needle, its characterized in that: at least two outer ring gas injection nozzles 11 are fixed on the base 1; a bottom ring seat 2 is fixed on the base 1, and a central burner 3 is fixed in the middle of the bottom ring seat 2; the top of the bottom ring seat 2 is provided with an outer convex ring wall 21 and an inner convex ring wall 22 which extend upwards, a surrounding type central upper air hole 4 is formed between the outer ring wall and the inner convex ring wall 22 of the central burner 3, an annular outer ring gas mixing cavity 23 is formed between the outer convex ring wall 21 and the inner convex ring wall 22, at least two independent lower concave cavities 24 are arranged on the outer ring gas mixing cavity 23, the two independent lower concave cavities 24 are symmetrically parallel, and each independent lower concave cavity 24 comprises an inner side wall 241, an outer side wall 242 and a cavity bottom wall 243; A gas guide wall 244 is arranged between the cavity bottom wall 243 of the independent lower cavity 24 and the outer convex annular wall 21, and the gas guide wall 244 is an arc gas guide wall or a plane slope gas guide wall; the inner side wall 241 comprises an arc inner side wall 2411 in the middle and plane inner side walls 2412 at two ends (the two ends of the arc inner side wall 2411 are the plane inner side walls 2412); a semi-circular boss 245 is formed between the outer side wall 242 of the independent lower concave cavity 24 and the outer convex annular wall 21 (the top wall surface of the semi-circular boss 245 can be a plane), and the outer side wall 242 is positioned at the inner side of the semi-circular boss 245; a bottom annular wall 246 of the outer annular gas mixing cavity 23 is formed between the planar inner side walls 2412 at two ends of the two adjacent independent lower cavities 24 (the surfaces of the bottom annular wall 246 are planar), the two bottom annular walls 246 are symmetrically parallel, the bottom annular wall 246 and the semicircular bosses 245 are the rest parts of the bottom wall of the outer annular gas mixing cavity 23 which are not recessed, and the bottom annular wall 246 and the semicircular bosses 245 are raised relative to the independent lower cavities 24; The middle part of the outer side wall 242 of each independent lower concave cavity 24 is provided with a pipeline hole 25 vertical to the outer side wall 242, the outer ring gas injection nozzle 11 is aligned to the outer hole opening of the pipeline hole 25, an air inlet gap 26 is formed between the outer hole opening of the pipeline hole 25 and the outer ring gas injection nozzle 11, and the air inlet gap 26 is used for introducing the independent lower concave cavities 24 and the outer ring gas mixing cavity 23 together with air for mixing when gas is injected; an insert 5 is fixed on the inner side wall 241 of each independent lower concave cavity 24, and an annular gas diversion throat 247 and an annular gas expansion part 248 are formed between the insert 5 and the outer side wall 242 of the inner hole of the pipeline hole 25 along the periphery; The outer wall surface of the inner convex annular wall 22 is sleeved with an inner annular member 27, the inner annular member 27 is integrally arranged in the outer annular gas mixing cavity 23, an annular convex edge 271 is transversely extended outwards from the top outer wall of the inner annular member 27, the annular convex edge 271 covers part of the outer annular gas mixing cavity 23 and the middle part of the independent lower cavity 24, upper air holes 28 are formed at two ends of the uncovered independent lower cavity 24, four upper air holes 28 are formed at four positions which are approximately distributed at 12 points, 3 points, 6 points and 9 points, and main gas of the independent lower cavity 24 is distributed to the whole outer annular gas mixing cavity 23 in an ascending flow manner from the upper air holes 28; an outer ring fire cover 29 is fixedly connected between the outer convex annular wall 21 and the inner convex annular wall 22, the outer ring fire cover 29 is integrally formed, the outer ring fire cover 29 comprises a top annular wall 291, a fire cover outer annular wall 292 extends downwards from the outer side of the top annular wall 291, a fire cover inner annular wall 293 extends downwards from the inner side of the top annular wall 291, a surrounding mixing cavity 294 is formed between the fire cover outer annular wall 292 and the fire cover inner annular wall 293, an outer ring fire hole group 2911 is arranged on the top annular wall 291, and the outer ring fire hole group 2911 is communicated with the surrounding mixing cavity 294; The fire cover outer annular wall 292 is fixedly connected with the outer convex annular wall 21, and the fire cover inner annular wall 293 is fixedly connected with the inner convex annular wall 22; a flow limiting channel 295 for the upward flow of the fuel gas is formed between the edge of the annular ledge 271 and the top annular wall 291 of the fire cover; the fuel gas is injected into the annular fuel gas expansion part 248 through the annular fuel gas diversion throat 247 by the outer annular fuel gas injection nozzle 11 and the pipeline holes 25, then is fully distributed into the whole independent lower concave cavity 24, and is distributed to the outer annular fuel gas mixing cavity 23 by the independent lower concave cavity 24, the fuel gas of the outer annular fuel gas mixing cavity 23 enters the surrounding mixing cavity 294 through the flow limiting channel 295, and finally is sprayed out and combusted at the top of the outer annular fire hole group 2911; a gas flow limiting gap 272 is formed between the top of the semicircular boss 245 and the annular ledge 271; opposite surfaces of the independent lower concave cavities 24 are raised parts 6, and two adjacent raised parts 6 and the bottom annular wall 246 are provided with transverse air inlet notch parts 61; the base 1 is connected with the bottom ring base 2, the air inlet notch 61 is changed into an air inlet hole, and the outside air enters from the air inlet hole and then ascends from the central air hole 4 to supplement oxygen for central combustion and outer ring combustion.

The number of the outer ring gas injection nozzles 11 is the same as the number of the independent lower cavities 24 and the structure is the same.

The inner inserts 5 are fixedly connected to the bottom of the inner ring 27, a mounting notch 51 is formed between the bottom of the inner ring 27 and two adjacent inner inserts 5, and when the inner inserts 5 are embedded into the independent lower concave cavities 24, the bottom of the inner ring 27 of the mounting notch 51 is fixedly connected with the inner side of the bottom annular wall 246; the outer wall surface of the insert 5 is a conical outer wall surface 52, a flat circular plane 53 is arranged in the middle of the conical outer wall surface 52, the diameter of the circular plane 53 is larger than that of the inner hole of the pipe hole 25, and the circular plane 53 is concentrically aligned with the pipe hole 25 and is parallel to the wall surface of the outer side wall 242; an annular gas diversion throat 247 (excluding the plane in which the circular plane 53 is directly aligned with the inner hole of the pipe hole 25) is formed between the circular plane 53 and the wall surface of the outer side wall 242, and a conical gas expansion portion 248 (a conical surrounding space formed by expanding the gas expansion portion 248 from inside to outside) is formed between the conical outer wall surface 52 and the wall surface of the outer side wall 242; the gas guide wall of the independent lower concave cavity 24 is arc-shaped; the middle part of the inner edge of the top of the semi-circular boss 245 is provided with a protruding part 2451 in a protruding mode (the protruding part 2451 is semi-circular), a gas converging groove 2452 is formed between the protruding part 2451 and the outer convex annular wall 21, a gas flow limiting gap 272 is formed between the top of the protruding part 2451 and the annular convex eave 271, and the gas flow limiting gap 272 and the gas converging groove 2452 are used for enabling the gas distribution of the independent lower concave cavity 24 to converge and be distributed on the top of the whole semi-circular boss 245, so that the gas distribution of the outer annular gas mixing cavity 23 is uniform.

The inner ring member 27 includes an inner convex ring wall 2701, an outer convex ring wall 2702, and a bottom ring wall 2703, and a surrounding groove 2704 is formed among the inner convex ring wall 2701, the outer convex ring wall 2702, and the bottom ring wall 2703, wherein the surrounding groove 2704 is used for increasing the space surrounding the mixing chamber 294, so that the gas distribution surrounding the mixing chamber 294 is more full and uniform, and the combustion firepower arrangement is uniform; an annular ledge 271 extends from the top outer side of the outer ledge 2702; the inner convex annular wall 2701 is sleeved on the outer wall surface of the inner convex annular wall 22.

The two sides of the outer hole opening of the pipeline hole 25 on the back surface of the bottom ring seat 2 are fixedly provided with gas windshields 62, and a positioning bayonet 63 is arranged between the gas windshields 62 on the two sides. The gas wind shield 62 prevents the external wind from blowing off the gas or from diffusing the gas, so that the gas is intensively injected into the pipeline holes 25, and the gas leakage is prevented.

The central burner 3 comprises a first central fire cover 31, a second central fire cover 32, a double-layer gas mixing head 33 and two central gas injection pipes 34; the double-layer gas mixing head 33 comprises an outer annular wall 331, an inner annular wall 332 and an annular bottom wall 333, an annular outer gas mixing cavity 334 is arranged between the outer annular wall 331 and the inner annular wall 332, and an inner gas mixing cavity 335 is arranged at the center of the inner annular wall 332; the top of the first central fire cover 31 is provided with a central combustion fire dividing hole group 311; the side wall of the second central fire cover 32 is provided with a central side combustion fire dividing hole group 321, and a hollow short pipe 322 extends downwards from the middle; the first central fire cover 31 is laminated on the second central fire cover 32 and fixedly connected with the second central fire cover; the outer wall of the second central fire cover 32 is fixedly connected to the top of the corresponding outer annular wall 331, the hollow short pipe 322 is inserted into the inner annular wall 333 and is connected and communicated with the inner wall surface of the internal combustion gas mixing cavity 335, the internal combustion gas mixing cavity 335 is communicated with the central combustion fire dividing hole group 311 through the hollow short pipe 322, and the outer combustion gas mixing cavity 334 is communicated with the central side combustion fire dividing hole group 321; two central gas injection pipes 34 are fixed at the outer bottom of the bottom ring seat 2 and are respectively arranged at the two air inlet notch parts 61, one of the two central gas injection pipes 34 is connected and communicated with the internal gas mixing cavity 335, and the other central gas injection pipe is connected and communicated with the external gas mixing cavity 334.

The two central gas injection pipes 34 comprise a first gas injection pipe 341 and a second gas injection pipe 342, the internal gas mixing cavity 335 is connected and communicated with the first gas injection pipe 341, and the external gas mixing cavity 334 is connected and communicated with the second gas injection pipe 342; the central side combustion fire dividing hole group 321, the outer fuel gas mixing cavity 334 and the fuel gas injection pipe II 342 are communicated; the central combustion fire dividing hole group 311, the hollow short pipe 322, the internal combustion gas mixing cavity 335 and the first gas injection pipe 341 are communicated; the first gas injection pipe 341 and the second gas injection pipe 342 are fixed on the back surface of the bottom ring seat 2, and part pipe sections of the first gas injection pipe 341 and the second gas injection pipe 342 and injection orifices are arranged at the two air inlet notch parts 61 (namely, the two air inlet notch parts 61 are respectively provided with a central gas injection pipe); a first central combustion injection nozzle 7 and a second central combustion injection nozzle 8 are fixed on the base 1; the first central combustion injection nozzle 7 is aligned to an injection orifice of the first gas injection pipe 341, and an air supplement surrounding gap 71 is formed between the injection orifice and the first central combustion injection nozzle 7; the second central combustion injection nozzle 8 is aligned with an injection orifice of the second gas injection pipe 342, and an air supplement surrounding gap 71 is formed between the injection orifice and the second central combustion injection nozzle 8. The air supplement surrounding gap 71 is used for introducing air together with the air for air-fuel mixing when the fuel gas is injected.

The air inlet notch part 61 of the injection openings of the first gas injection pipe 341 and the second gas injection pipe 342 is provided with a left gas wind shield 62, a right gas wind shield 62 and a rear gas wind shield 62 which are connected (the air outside is prevented from blowing away the gas or the gas is prevented from diffusing outwards, the gas is intensively injected into the central gas injection pipe, the gas leakage is prevented, and the like), and the central combustion injection nozzle is semi-surrounded by the gas wind shields 62; a venturi tube is fixedly built in the first gas injection tube 341 and the second gas injection tube 342; a positioning bayonet 63 is arranged between the left wall and the right wall of the gas windshield 62; the tops of the first central combustion injection nozzle 7 and the second central combustion injection nozzle 8 are respectively fixed with a positioning column 64, and the positioning columns 64 are inserted into the positioning bayonets 63 for positioning after the base 1 is connected with the bottom ring seat 2. The positioning bayonet 63 is arranged on the reverse side of the bottom ring seat.

The first gas injection pipe 341 and the second gas injection pipe 342 are arranged obliquely upwards with the corresponding first central combustion injection nozzle 7 and second central combustion injection nozzle 8, the upward inclination angles are consistent, and the upward inclination angle is any degree between 5 degrees and 20 degrees; the first central combustion injection nozzle 7 and the second central combustion injection nozzle 8 comprise a central nozzle seat 81 and a central gas injection nozzle 82, a central gas input channel 83 is arranged in the central nozzle seat 81, the central gas injection nozzle 82 is fixedly connected to the outlet of the central gas input channel 83, and the inlet of the central gas input channel 83 is used for a gas pipe to be connected with input gas; the central nozzle seat of the first central combustion injection nozzle 7 is connected with a central gas inlet pipe 72.

The outer ring gas injection nozzle 11 comprises an outer ring nozzle seat 111 and an outer ring gas injection nozzle 112, an outer ring gas input channel 113 is arranged in the outer ring nozzle seat 111, the outer ring gas injection nozzle 112 is fixedly connected to the outlet of the outer ring gas input channel 113, an outer ring gas inlet pipe 114 is fixedly connected to the inlet of the outer ring gas input channel 113, and the two outer ring gas injection nozzles 11 are connected and communicated through the outer ring gas inlet pipe 114; the outer ring gas injection nozzle 11 is arranged in a tilting manner; the pipeline holes 25 are arranged in a tilting mode and are consistent with the tilting angle of the outer ring gas injection nozzle 11, and the tilting angle is any degree between 5 degrees and 20 degrees; a positioning column 64 is fixed at the top of the outer ring gas injection nozzle 11, and the positioning column 64 is inserted into a positioning bayonet 63 for positioning after the base 1 is connected with the bottom ring seat 2; the outer ring gas inlet pipe 114 may or may not be in communication with the center gas inlet pipe 72.

A flame monitoring needle 101 and an ignition needle 102 are longitudinally connected and fixed in the middle of the base 1 in a penetrating way; the outer annular wall of the double-layer gas mixing head 33 is extended with an annular flange 301, a flame monitoring needle positioning semicircular notch 302 and an ignition needle positioning semicircular notch 303 are arranged on the annular flange 301, and the flame monitoring needle positioning semicircular notch 302 and the ignition needle positioning semicircular notch 303 are in one-to-one correspondence with the flame monitoring needle 101 and the ignition needle 102.

The outer wall surface of the inner insert can be replaced by a pure flat wall surface, the outer side wall surface of the inner hole of the pipeline hole along the periphery can be replaced by a convex plane ring, and the plane ring extends to form a conical wall surface.

The foregoing is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the foregoing embodiment, and all technical solutions belonging to the principles of the present invention are within the protection scope of the present invention. Modifications and alterations will be apparent to those skilled in the art without departing from the principles of this invention, and such modifications and alterations should also be regarded as being within the scope of the invention.

Claims

1. The utility model provides a combustor, includes base, ignition needle, its characterized in that: at least two outer ring gas injection nozzles are fixed on the base; a bottom ring seat is fixed on the base, and a central burner is fixed in the middle of the bottom ring seat;

The top of the bottom ring seat is provided with an outer convex ring wall and an inner convex ring wall which extend upwards, a surrounding type central upper air hole is formed between the outer ring wall and the inner convex ring wall of the central burner, an annular outer ring gas mixing cavity is formed between the outer convex ring wall and the inner convex ring wall, at least two independent lower concave cavities are arranged on the outer ring gas mixing cavity, and each independent lower concave cavity comprises an inner side wall, an outer side wall and a cavity bottom wall; a fuel gas guide wall is arranged between the cavity bottom wall of the independent lower concave cavity and the outer convex annular wall; the inner side wall comprises an arc-shaped inner side wall in the middle part and plane inner side walls at two ends;

a semicircular boss is formed between the outer side wall of the independent lower concave cavity and the outer convex annular wall, and the outer side wall is arranged on the inner side of the semicircular boss;

A bottom annular wall of the outer ring gas mixing cavity is formed between the plane inner side walls at the two ends of the two adjacent independent lower concave cavities, the bottom annular wall and the semi-circle-lack boss are the rest parts of the bottom wall of the outer ring gas mixing cavity, which are not concave, and the bottom annular wall and the semi-circle-lack boss are convex relative to the independent lower concave cavities;

The middle part of the outer side wall of each independent lower concave cavity is provided with a pipeline hole vertical to the outer side wall, the outer ring gas injection nozzle is aligned to the outer hole opening of the pipeline hole, and an air inlet gap is formed between the outer hole opening of the pipeline hole and the outer ring gas injection nozzle;

An inner insert is fixed on the inner side wall of each independent lower concave cavity, and an annular gas diversion throat part and an annular gas expansion part are formed between the inner insert and the outer side wall of the inner hole edge periphery of the pipeline hole;

The outer wall surface of the inner convex annular wall is sleeved with an inner annular part, the inner annular part is integrally arranged in the outer annular gas mixing cavity, an annular convex edge transversely extends outwards from the outer wall of the top of the inner annular part, the annular convex edge covers part of the outer annular gas mixing cavity, the middle part of an independent lower concave cavity is covered, and upper air holes are formed at two ends of the uncovered independent lower concave cavity;

An outer ring fire cover is fixedly connected between the outer convex annular wall and the inner convex annular wall together, the outer ring fire cover is integrally formed, the outer ring fire cover comprises a top annular wall, the outer side of the top annular wall downwards extends to form a fire cover outer annular wall, the inner side of the top annular wall downwards extends to form a fire cover inner annular wall, a surrounding mixing cavity is formed between the fire cover outer annular wall and the fire cover inner annular wall, the top annular wall is provided with an outer ring fire hole set, and the outer ring fire hole set is communicated with the surrounding mixing cavity; the fire cover outer annular wall is fixedly connected with the outer convex annular wall, and the fire cover inner annular wall is fixedly connected with the inner convex annular wall;

a current limiting channel is formed between the edge of the annular convex eave and the annular wall of the top of the fire cover;

The fuel gas is injected into the annular fuel gas diversion throat through the outer annular fuel gas injection nozzle and the pipeline holes and then flows to the annular fuel gas expansion part, then the whole independent lower concave cavity is fully distributed, the independent lower concave cavity is distributed to the outer annular fuel gas mixing cavity, the fuel gas of the outer annular fuel gas mixing cavity enters the surrounding mixing cavity through the flow limiting channel, and finally the fuel gas is sprayed out of the outer annular fire hole group at the top for combustion;

a gas flow limiting gap is formed between the top of the semicircular boss and the annular eave;

the opposite reverse surfaces of the independent lower concave cavities are raised parts, and two adjacent raised parts and the bottom annular wall form a transverse air inlet notch part; the base is connected with the bottom ring base, the air entering gap part is changed into an air inlet hole, and the outside air enters from the air inlet hole and then ascends from the central air hole to supplement oxygen for central combustion and outer ring combustion;

the inner inserts are fixedly connected to the bottom of the inner ring, a mounting notch part is formed between the bottom of the inner ring and two adjacent inner inserts, and when the inner inserts are embedded into the independent lower concave cavities, the bottom of the inner ring of the mounting notch part is fixedly connected with the inner side of the bottom ring wall;

The outer wall surface of the inner insert is a conical outer wall surface, a flat circular plane is arranged in the middle of the conical outer wall surface, and the circular plane is concentrically aligned with the pipeline hole and is parallel to the wall surface of the outer side wall; an annular gas diversion throat part is formed between the circular plane and the wall surface of the outer side wall, and a conical gas expansion part is formed between the conical outer wall surface and the wall surface of the outer side wall; the fuel gas guide wall of the independent lower concave cavity is arc-shaped; a convex part is convex at the middle part of the inner edge of the top of the semicircular boss, a gas converging groove is formed between the convex part and the outer convex annular wall, and a gas flow limiting gap is formed between the top of the convex part and the annular convex eave;

The inner ring piece comprises an inner convex ring wall, an outer convex ring wall and a bottom ring wall, and surrounding grooves are formed among the inner convex ring wall, the outer convex ring wall and the bottom ring wall; the outer side of the top of the outer convex annular wall is extended with an annular convex eave; the inner convex annular wall is sleeved on the outer wall surface of the inner convex annular wall.

2. A burner as claimed in claim 1, wherein: the gas wind shields are fixed on two sides of the outer hole of the pipeline hole on the back surface of the bottom ring seat, and positioning bayonets are arranged between the gas wind shields on two sides.

3. A burner as claimed in claim 1, wherein: the central burner comprises a first central fire cover, a second central fire cover, a double-layer gas mixing head and two central gas injection pipes; the double-layer gas mixing head comprises an outer annular wall, an inner annular wall and an annular bottom wall, an annular outer gas mixing cavity is arranged between the outer annular wall and the inner annular wall, and the center of the inner annular wall is an inner gas mixing cavity; the top of the first central fire cover is provided with a central combustion fire dividing hole group; the side wall of the second central fire cover is provided with a central side combustion fire dividing hole group, and a hollow short pipe extends downwards from the middle; the first central fire cover is laminated on the second central fire cover and fixedly connected with the second central fire cover; the outer wall of the second central fire cover is fixedly connected to the top of the corresponding outer annular wall, the hollow short pipe is inserted into the inner annular wall and communicated with the internal combustion gas mixing cavity, and the external combustion gas mixing cavity is communicated with the central side combustion fire dividing hole group; the outer bottom of the bottom ring seat is fixedly provided with two central gas injection pipes which are respectively arranged at the two air inlet notch parts, one of the two central gas injection pipes is connected and communicated with the internal combustion gas mixing cavity, and the other central gas injection pipe is connected and communicated with the external combustion gas mixing cavity.

4. A burner according to claim 3, wherein: the two central gas injection pipes comprise a first gas injection pipe and a second gas injection pipe, the internal gas mixing cavity is communicated with the first gas injection pipe in a connecting way, and the external gas mixing cavity is communicated with the second gas injection pipe in a connecting way; the central side combustion fire dividing hole group, the outer fuel gas mixing cavity and the fuel gas injection pipe II are communicated; the central combustion fire dividing hole group, the hollow short pipe, the internal combustion gas mixing cavity and the first gas injection pipe are communicated; the first gas injection pipe and the second gas injection pipe are fixed on the back surface of the bottom ring seat, and part pipe sections of the first gas injection pipe and the second gas injection pipe and the injection orifice are arranged at the two air inlet notch parts; the base is fixedly provided with a first central combustion injection nozzle and a second central combustion injection nozzle; the first central combustion injection nozzle is aligned with an injection orifice of the first gas injection pipe, and an air supplement surrounding gap is formed between the injection orifice and the first central combustion injection nozzle; the second central combustion injection nozzle is aligned with an injection orifice of the second gas injection pipe, and an air supplement surrounding gap is formed between the injection orifice and the second central combustion injection nozzle.

5. A burner as claimed in claim 4, wherein: the middle of the air inlet notch part of the injection orifice of the first gas injection pipe and the second gas injection pipe is downwards extended with left, right and rear side connected gas windshields which semi-surround the central combustion injection nozzle; the first gas injection pipe and the second gas injection pipe are internally provided with a venturi tube; a positioning bayonet is arranged between the left wall and the right wall of the gas windshield; the tops of the first central combustion injection nozzle and the second central combustion injection nozzle are respectively fixed with a positioning column, and the positioning columns are inserted into the positioning bayonets for positioning after the base is connected with the bottom ring seat.

6. A burner as claimed in claim 4, wherein: the first gas injection pipe and the second gas injection pipe are respectively arranged in a tilting manner with the corresponding first central combustion injection nozzle and second central combustion injection nozzle, the tilting angles are consistent, and the tilting angle is any degree between 5 degrees and 20 degrees; the first central combustion injection nozzle and the second central combustion injection nozzle comprise a central nozzle seat and a central gas injection nozzle, a central gas input channel is arranged in the central nozzle seat, the central gas injection nozzle is fixedly connected to an outlet of the central gas input channel, and an inlet of the central gas input channel is used for a gas pipe to be connected with input gas; the central nozzle seat of the first central combustion injection nozzle is connected with a central gas inlet pipe.

7. A burner as claimed in claim 1, wherein: the outer ring gas injection nozzle comprises an outer ring nozzle seat and an outer ring gas injection nozzle, an outer ring gas input channel is arranged in the outer ring nozzle seat, the outer ring gas injection nozzle is fixedly connected to an outer ring gas input channel outlet, an outer ring gas inlet pipe is fixedly connected to an outer ring gas input channel inlet, and the two outer ring gas injection nozzles are connected and communicated through the outer ring gas inlet pipe; the outer ring gas injection nozzle is arranged in a tilting manner; the pipeline Kong Angqing is arranged and is consistent with the upward inclination angle of the outer ring gas injection nozzle, and the upward inclination angle is any degree between 5 degrees and 20 degrees; the top of the outer ring gas injection nozzle is fixed with a positioning column, and the positioning column is inserted into the positioning bayonet for positioning after the base is connected with the bottom ring seat.

8. A burner according to claim 3, wherein: a flame monitoring needle and an ignition needle are longitudinally connected and fixed in the middle of the base in a penetrating way; the outer annular wall of the double-layer gas mixing head extends to form an annular flange, a flame monitoring needle positioning semicircular notch and an ignition needle positioning semicircular notch are arranged on the annular flange, and the flame monitoring needle positioning semicircular notch and the ignition needle positioning semicircular notch are in one-to-one correspondence with the flame monitoring needle and the ignition needle.