CN217503668U

CN217503668U - Fire grate, combustor and water heater

Info

Publication number: CN217503668U
Application number: CN202220682799.7U
Authority: CN
Inventors: 陈文风; 王金; 梁国荣
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2021-03-25
Filing date: 2022-03-25
Publication date: 2022-09-27
Anticipated expiration: 2032-03-25
Also published as: CN217302793U; EP4273449A4; WO2022199700A1; CN115127104A; CN217356881U; WO2023151159A1; CN217302792U; EP4273449A1; CN115200016A; WO2023151158A1; US20230408147A1

Abstract

The utility model discloses a fire grate, a burner and a water heater, wherein the burner comprises a fire grate body and a metal net, and the fire grate body forms a ventilation channel; the top of the fire grate body is provided with a shunting hole communicated with the ventilation channel; and the metal net is attached to the fire grate body at a position corresponding to the shunting hole. The technical scheme of the utility model through arrange the piece top at the fire and be equipped with by the great diffluence vent of trompil area and metal mesh combination formation fire pore structure and steady flame device. Wherein, the open area of the shunting hole is increased, so that the performance of the flue gas discharged by instantaneous combustion is better, and the generation of nitrogen oxides can be reduced. Moreover, the metal mesh can improve the single-piece heat load combustion adaptation range, can solve the use problem that small load cannot be reduced, reduces segmentation, has simple structure, convenient manufacture and low cost, and can meet the use requirement of low nitrogen emission of the whole machine.

Description

Fire grate, combustor and water heater

RELATED APPLICATIONS

This application claims priority from the chinese patent application entitled fire separating device, burner and water heating apparatus, filed on 25/03/2021, application No. 202120612600.9, the entire contents of which are incorporated herein by reference.

Technical Field

The utility model relates to a fluid heating equipment technical field, in particular to fire grate, combustor and water heater.

Background

In the related art, a burner is a core component of a water heater. The existing water heater burner adopts a fully premixed combustion technology, a shade combustion technology and a water-cooling combustion technology in the aspect of a low nitrogen oxide combustion technology, and the fire hole structure of the existing burner usually adopts a single-strip fire hole structure, the single-strip fire hole structure has high fire hole strength of combustion due to small fire hole area, the performance of flue gas discharged in instant combustion is poor, so that nitrogen oxide is higher, the requirement of low nitrogen emission performance cannot be met, and therefore, the structure of the fire grate is necessarily improved.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a fire grate

In order to achieve the above object, the utility model provides a fire grate, fire grate includes:

the fire grate comprises a fire grate body, a fire grate and a fire grate, wherein the fire grate body forms a ventilation channel; the top of the fire grate body is provided with a shunting hole communicated with the ventilation channel; and

and the metal net is attached to the fire grate body at a position corresponding to the shunting hole.

In one embodiment, the number of layers of the metal mesh is multiple.

In one embodiment, the top of the fire grate body is plate-shaped, the fire grate body is provided with two side plates extending from the top to the same side of the top, and the ventilation channel is formed between the two side plates.

In one embodiment, the two side plates are respectively provided with a lateral convex hull, the lateral convex hulls are arranged near the top of the side plates, and the top of the lateral convex hulls form flame stabilizing holes.

In one embodiment, the top of the fire grate body is provided with a fire transfer plate extending outwards along the horizontal direction.

In one embodiment, the fire rows are arranged side by side, and the fire plates of adjacent fire rows are abutted.

In one embodiment, the fire grate further comprises a flame holder, and the flame holder is sleeved on the upper part of the fire grate body; a cavity with an open top surface is formed in the flame stabilizing device, a gap is formed between the side wall of the cavity and the surface of the fire grate body, and the gap is communicated with the ventilation channel.

In one embodiment, the side plate has an air outlet to communicate the air passage and the gap.

In one embodiment, the flow area of the air outlet gradually increases from the ventilation channel to the gap.

In one embodiment, the metal mesh is attached to the inner side of the shunt.

In one embodiment, in the metal mesh, the edge of at least one layer of metal mesh is bent to form a bent part.

In one embodiment, the splitter bore includes a first plurality of splitter bores and a second plurality of splitter bores, the second splitter bore having an area smaller than the area of the first splitter bore.

In one embodiment, the first plurality of flow dividing holes and the second plurality of flow dividing holes are arranged at intervals along the length direction of the top of the fire grate body.

In one embodiment, the first distributing holes and the second distributing holes are alternately arranged at intervals along the length direction of the top of the fire grate body.

In one embodiment, the second diversion hole comprises a plurality of sub-diversion holes, and the plurality of sub-diversion holes are arranged along the width direction of the top of the fire grate body.

The utility model also discloses a burner and a water heater using the burner, wherein the burner comprises a fire grate body and a metal net, and the fire grate body forms a ventilation channel; the top of the fire grate body is provided with a shunting hole communicated with the ventilation channel; and the metal net is attached to the fire grate body at a position corresponding to the shunting hole.

The technical scheme of the utility model through arrange the piece top at the fire and be equipped with by the great diffluence vent of trompil area and metal mesh combination formation fire pore structure and steady flame device. Wherein, the open area of the shunting hole is increased, so that the performance of the flue gas discharged by instantaneous combustion is better, and the generation of nitrogen oxides can be reduced. Moreover, the metal mesh can improve the single-piece heat load combustion adaptation range, can solve the use problem that small load cannot be reduced, reduces segmentation, has simple structure, convenient manufacture and low cost, and can meet the use requirement of low nitrogen emission of the whole machine.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of the fire grate of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a sectional view A-in FIG. 1;

FIG. 4 is a schematic view of the flow of the gas stream of FIG. 3;

FIG. 5 is another side view of FIG. 1;

FIG. 6 is a schematic structural view of another embodiment of the diverter orifice of FIG. 5;

fig. 7 is a schematic structural diagram of an embodiment of the burner of the present invention;

FIG. 8 is a schematic structural view of the fire grate body of FIG. 1;

FIG. 9 is a side view of FIG. 8;

FIG. 10 is a schematic structural view of another embodiment of the diverter orifice of FIG. 9;

FIG. 11 is another side view of FIG. 8;

FIG. 12 is a cross-sectional view taken along line B-B of FIG. 8;

FIG. 13 is another schematic view of the structure of the metal mesh of FIG. 12;

FIG. 14 is a schematic structural view of another embodiment of the fire grate body of FIG. 1;

FIG. 15 is a cross-sectional view C-C of FIG. 14;

FIG. 16 is another schematic view of the structure of the expanded metal of FIG. 15;

FIG. 17 is an enlarged view taken at A in FIG. 16;

FIG. 18 is a schematic view of the flame holding apparatus of FIG. 1;

FIG. 19 is a side view of FIG. 18;

FIG. 20 is another side view of FIG. 18;

FIG. 21 is a cross-sectional view taken along line D-D of FIG. 18;

FIG. 22 illustrates a top view of a fire distribution device according to an embodiment of the present application;

FIG. 23 illustrates a side view of a fire distribution device according to an embodiment of the present application;

FIG. 24 illustrates a cross-sectional view in the direction E-E of FIG. 23 of a fire distribution device according to an embodiment of the present application;

FIG. 25 illustrates a side view of a combustor according to an embodiment of the present application;

FIG. 26 illustrates a top view of a combustor according to an embodiment of the present application;

FIG. 27 shows a cross-sectional view in the direction F-F in FIG. 25 of a fire distribution device according to an embodiment of the present application;

FIG. 28 illustrates a top view of a combustor according to an embodiment of the present application;

FIG. 29 is a schematic structural view of another embodiment of the fire grate of the present invention;

FIG. 30 is a schematic structural view of another embodiment of the fire grate of the present invention;

FIG. 31 is a schematic structural view of the fire grate body of FIG. 29;

FIG. 32 is a cross-sectional view of C1-C1 of FIG. 31.

The reference numbers illustrate:

reference numerals	Name(s)	Reference numerals	Name (R)
				1	Burner with a burner head	110	Ventilation channel
101	First current dividing region	121	First flow dividing hole
				102	Second shunt area	122	Second flow dividing hole
12	Support rib	122a	Sub-shunting hole
				14	Welding zone	120	Flow dividing hole
10	Fire grate	200	Flame stabilizing device
				203	Side convex hull	210	Cavity body
204	Flame stabilizing hole	211	Open mouth
				205	Flame guide plate	212	Gap
206	Fire transmission plate	220	Reinforcing rib
				100	Fire grate body	300	Metal net
130	Top part	230	Lateral bulge
				140	Two side plates	232	Inner bulge
150	Air outlet	231	Outer bulge
				240	Flame guide part

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a fire grate 10.

In the embodiment of the present invention, as shown in fig. 1 to 28, the fire grate 10 includes a grate body 100 and a metal mesh 300; the fire grate body 100 forms a vent passage 110; the top 130 of the fire grate body 100 is provided with a diversion hole 120 communicated with the vent channel 110; and a metal mesh 300 attached to the fire grate body 100 at a position corresponding to the diversion hole 120.

Wherein, the fire row 10 is mainly used on the combustor 1, the fire row 10 is one of the core components of the combustor 1, and in the aspect of low nitrogen oxide combustion technology of the combustor 1 of the gas water heater, the structure of the fire row 10 plays a key role. In the case of the fire grate 10, the fire grate 10 includes a grate body 100 and a metal mesh 300, the grate body 100 forms a ventilation channel 110, the ventilation channel 110 has an air inlet, the air inlet is usually connected with an air flow source, the air flow source includes air and fuel gas, the fuel gas and the air enter the ventilation channel 110 from the air inlet, the fuel gas and the air are premixed in the ventilation channel 110, and after sufficient mixing and flow distribution through the metal mesh 300 or the flow distribution holes 120, the mixture is finally ignited at the top 130 of the grate 10, and then a stable and uniform flame is formed.

It should be noted that, in the embodiment of the present invention, in order to improve the heat load of the fire grate 10, the adaptability range is improved, and further the instantaneous combustion exhaust smoke performance is better, and finally the nitrogen oxide generated after the combustion is realized is lower, the opening area of the diversion hole 120 of the present utility model is larger than the opening area of the diversion hole 120 of the present common fine strip shape, generally between 5 times and 100 times of the present common hole, exemplarily including but not limited to 5 times, 6 times, 8 times, 10 times, 20 times, 30 times, 40 times, 50 times, 60 times, 70 times, 80 times, 90 times and 100 times, the diversion hole 120 may be designed in a circular, oval, square or other regular or morphological shape, and the square is described as an example below.

Secondly, considering that the opening area of the branch holes 120 is too large, in order to avoid the phenomenon of backfire, a metal mesh 300 is attached to the fire grate body 100, and the metal mesh 300 is arranged corresponding to the branch holes 120. Further, considering that the size of the open area of the metal mesh 300 is large, in order to prevent the explosion accident caused by the tempering, please refer to fig. 3, 12, and 15 to 17, the metal mesh 300 is provided in multiple layers. The number of layers of the metal mesh 300 is set in relation to the mesh number of the metal mesh 300, and the number of layers of the metal mesh 300 is inversely related to the mesh number of the metal mesh, that is, the number of layers of the metal mesh 300 with a large mesh number is small, and the number of layers with a small mesh number is large, for example, the number of layers of the metal mesh 300 includes, but is not limited to, 2 to 10 layers, and specifically, may be 2 layers, 3 layers, 5 layers, 8 layers, or 10 layers. The mesh number of the conventional metal mesh 300 is 20 to 100, and may be 20, 40, 50, 60, 80 or 100, and the metal mesh 300 with the larger mesh number is preferably 50 mesh and 3 layers according to the test study, considering that the excessive number of layers may cause insufficient supply of the air flow and the high price of the metal mesh 300 with the larger mesh number. So, it is equipped with metal mesh 300 to paste at row's of a fire body 100 top 130, and simultaneously, with the increase of diffluence hole 120 area, it is better to make row of a fire 10 burn discharge flue gas performance in the twinkling of an eye, and can reduce nitrogen oxide's production, and simultaneously, the major structure that adopts metal mesh 300 to do the fire hole has the flame stabilizing effect, can improve the increase of the thermal load burning accommodation of row of a fire 10 monolithic, can solve the use problem that the little load can not be low, make it reduce the segmentation, moreover, the steam generator is simple in structure, the manufacture is convenient, and the cost is low, and can satisfy the operation requirement that the low nitrogen of complete machine discharged.

Further, the metal mesh 300 is attached to the fire grate body 100 at a position corresponding to the diversion hole 120. Here, the metal mesh 300 may be attached to the inside of the fire grate body 100 at a position corresponding to the diversion holes 120 (see fig. 3 for details), that is, the metal mesh 300 is actually located in the ventilation channel 110. The metal mesh 300 may also be attached to the outer surface of the fire grate body 100 at a position corresponding to the diversion holes 120 (see fig. 29 to 32 for details), that is, the metal mesh is attached to the top 130 of the fire grate body 100. In addition, in the embodiment that the metal mesh 300 is attached to the inside of the fire grate body 100, the metal mesh 300 firstly divides the air flow mixed by the air and the gas from the ventilation channel 110, then the air flow is sufficiently divided and mixed by the metal mesh 300, and finally the air flow is combusted above the dividing holes 120 to form stable and uniform flames. In the embodiment where the metal mesh 300 is attached to the outside of the fire row body 100, the air flow mixed by air and gas from the ventilation channel 110 is firstly divided by the flow dividing holes 120, then sufficiently divided and mixed by the metal mesh 300, and finally combusted above the metal mesh 300 to form stable and uniform flame. In addition, it should be noted that the diversion holes 120 may be used to divert the flame, or may be used to mix specific air and gas, depending on the location where the metal mesh 300 is installed.

The technical scheme of the utility model is through being equipped with by the great diffluence vent 120 of aperture area and the combination of metal mesh 300 and form fire hole structure and flame holder 200 at row of fire 10 piece tops 130. Wherein, the opening area of the shunting hole 120 is increased, so that the performance of the flue gas discharged by instantaneous combustion is better, and the generation of nitrogen oxides can be reduced. Moreover, the metal net 300 can improve the single-piece heat load combustion adaptation range, can solve the use problem that the small load cannot be reduced, reduces the segmentation, has simple structure, convenient manufacture and low cost, and can meet the use requirement of low nitrogen emission of the whole machine.

Furthermore, in order to further improve the stability of the flame, the fire grate 10 further comprises a flame holder 200, and the flame holder 200 is sleeved on the upper part of the fire grate body 100; a cavity 210 with an open top surface 211 is formed in the flame holder 200, and the open top surface 211 corresponds to the shunting hole 120. Referring to fig. 3, 18 to 21, at least two proposals for the flame stabilizing device 200 to be used as a flame stabilizing device are as follows, one of which is to provide a flame guide 240 at the opening 211 of the flame stabilizing device 200, the flame guide 240 being located in the width direction of the top 130 of the fire grate body 100, and the flame guide 240 being formed by extending upward and outward relative to the horizontal direction. The flame guide parts 240 are arranged on the two sides of the top 130 of the fire grate body 100 in the width direction, so that the side flames formed at the shunting holes 120 can be guided, the side flames are gathered towards the target area of the fire grate 10, and the heat gathering effect in the combustion process is improved. Secondly, through the arrangement of the whole structure of the flame holder 200, a gap 212 is formed between the side wall of the cavity 210 and the surface of the fire grate body 100, and the gap 212 is communicated with the vent passage 110. Thus, the gap 212 in the flame holder 200 is communicated with the ventilation channel 110, so that the air outlet space is increased, and the resistance of the air flow is reduced. It will be appreciated that, again to ensure safety, the gap 212 should not be too large, and is expected to be between 2mm and 20mm, including, by way of example and not limitation, 2mm, 3mm, 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20 mm.

Referring to fig. 5 and 6, in an embodiment, in order to reduce the difficulty of the processing process while ensuring low-nitrogen combustion, the diversion holes 120 are arranged at intervals along the length direction of the top 130 of the fire grate body 100. Further, the flow dividing holes 120 include a plurality of first flow dividing holes 121 and a plurality of second flow dividing holes 122, and the plurality of first flow dividing holes 121 and the plurality of second flow dividing holes 122 are arranged at intervals along the length direction of the top 130 of the fire grate body 100.

Referring to fig. 6 or 10, on the basis of the above embodiment, the first branch holes 121 and the second branch holes 122 are alternately arranged at intervals along the length direction of the top 130 of the fire grate body 100. Alternatively, in some other preferred embodiments, in order to further increase the area of secondary contact between the gas and the air, the second diverging hole 122 includes a plurality of sub-diverging holes 122a, the plurality of sub-diverging holes 122a are arranged in the width direction of the top 130 of the fire grate body 100, and the opening area of the first diverging hole 121 is larger than that of the second diverging hole 122. Thus, the area of secondary contact between the fuel gas and the air is increased by arranging the flow dividing holes 120 with different areas.

Referring to fig. 3, 12, and 15 to 17, in another embodiment, the metal mesh 300 can be stacked in various ways, for example: a roll-up curtain shape or an S-shape, etc. It is worth mentioning that, in order to improve the strength of the metal mesh 300 and improve the flame combustion stability, the edges of the two opposite sides of each layer of metal mesh 300 are bent to form bent portions, the bent portions can generate tension, and the strength of the bent metal mesh 300 is higher. Here, hem department can be width direction's both sides, also can be length direction's both sides, consider from the angle of effect, the tension that metal mesh 300 length direction's both ends were bent is bigger, metal mesh 300's intensity is also bigger, simultaneously, every layer of metal mesh 300's the portion of bending and the portion of bending or the net of another layer meet, and make to be formed with the interval between the adjacent two-layer metal mesh 300, set up like this, can make the resistance that the air current flows through metal mesh 300 reduce, guarantee sufficient air current.

Referring to fig. 18 to 21, it should be mentioned that, in order to enhance the structural strength of the flame holder 200, the flame holder 200 is further provided with a reinforcing rib 220 at the opening 211, and the reinforcing rib 220 is fixedly connected to the metal mesh 300; alternatively, the reinforcing rib 220 is fixedly connected with the top 130 of the fire grate body 100. Meanwhile, in order to improve the combustion rate of the fire grate 10, the flame holder 200 includes two side plates that are fastened to each other, the two side plates are respectively provided with a lateral convex hull 203, and the lateral protrusions 230 are arranged at intervals along the length direction of the flame holder 200; wherein the lateral protrusions 230 comprise an inner protrusion 232 and at least two outer protrusions 231; the inner protrusions 232 protrude towards the cavity 210, and the at least two outer protrusions 231 protrude towards the outer side of the fire grate 10; the inner protrusions 232 are disposed between the at least two outer protrusions 231.

For convenience of description, the two side plates are named as a first side plate and a second side plate respectively for description:

specifically, the first side plate and the second side plate are formed by being buckled with each other, and a plurality of lateral protrusions 230 are respectively arranged along the length direction of the first side plate and the second side plate, and the lateral protrusions 230 are arranged at intervals along the length direction of the first side plate or the second side plate. The lateral protrusions 230 comprise an inner protrusion 232 and at least two outer protrusions 231; the inner protrusion 232 protrudes towards the cavity 210, and the protruding direction of the at least two outer protrusions 231 is opposite to the protruding direction of the inner protrusion 232; thus, the inner and outer protrusions 231 are designed to facilitate positioning of the flame holder 200 during installation, so that a ventilation channel is formed between the flame holder 200 and the outer wall of the cavity 210, and the outer protrusions 231 ensure secondary air inlet channels between the fire rows 10. Preferably, for convenience of processing and convenience of arrangement and installation in a scenario where a plurality of fire grates 10 are used simultaneously, the protrusions of the first side plate and the lateral protrusions 230 of the second side plate are symmetrically distributed in the width direction of the top 130 of the fire grate body 100.

In addition, the first side plate and the second side plate are provided with flame guide portions 240 extending upward; for example, the flame guide portion 240 may be formed by extending the top edges of the first side plate and the second side plate upward and outward in the vertical direction. Through be in first curb plate with set up flame guide plate 205 on the topside of second curb plate, can play the effect of direction to the combustion panel department formation flame to make the side flame gather together towards the monoblock central zone of fire row 10, be favorable to improving the thermal effect that gathers in the combustion process.

Referring to fig. 8 to 17, in another preferred embodiment, the top 130 of the fire grate body 100 is plate-shaped, the fire grate body 100 has two side plates 140 extending from the top 130 to the same side thereof, the ventilation channel 110 is formed between the two side plates, in order to further improve the stability of the flame, the side plates are provided with air outlets 150 to communicate the ventilation channel 110 with the gap 212, and in this embodiment, through the arrangement of the air outlets 150, air outlet spaces of the mixed gas are increased on two sides so as to reduce the resistance of the mixed gas flow, so that the mixed gas flow can stay above the fire grate 10 for a slightly longer time, thereby further improving the combustion of the gas.

On the basis of the above embodiment, in order to further reduce the resistance of the mixed gas flow, the number of the gas outlets 150 is plural. Meanwhile, in order to further reduce the difficulty of the processing process, the plurality of air outlets 150 are arranged at intervals on the side plate along the length direction of the top 130 of the fire grate body 100. Further, referring to fig. 17, the flow area of the air outlet 150 gradually increases from the ventilation channel 110 to the gap 212. Further, the location of the air outlet 150 is convex toward the air vent passage 110 to further reduce the resistance of the mixture flow.

In an embodiment, before the stamping of the two side plates to form the vent channel 110 between the two side plates 140, the method further comprises the steps of:

an air outlet 150 is formed in the preset position of the two side plates; after the flame holder 200 is sleeved on the upper portion of the fire grate body 100, the ventilation channel 110 is communicated with the gap 212.

A fire grate 10 according to an embodiment of the present application is described below with reference to fig. 22-28.

As shown in fig. 22-25, the fire grate 10 includes a grate body 100 and a metal mesh 300.

Illustratively, the fire grate body 100 forms a vent passage 110; the top 130 of the fire grate body 100 is provided with a diversion hole 120 communicated with the vent channel 110; and a metal mesh 300 attached to the fire grate body 100 at a position corresponding to the diversion hole 120. Wherein the metal mesh 300 is constructed in a mesh structure.

The fire grate 10 of the embodiment of the present application may be used for the burner 1. For example, in the example shown in fig. 4, the diversion holes 120 may be disposed at the gas outlet end of the top 130 of the fire row 10, and are used for diverting the mixture flowing out of the ventilation channels 110 of the fire row 10 and forming a stable and uniform flame above the fire row 10 during the combustion of the mixture.

Illustratively, as shown in fig. 22 and 23, the top 130 of the fire grate body 100 at the positions of the plurality of diversion holes 120 forms a diversion part, and the diversion part can be provided with a plurality of diversion areas. The plurality of flow dividing regions may be provided at intervals in the longitudinal direction of the flow dividing portion. The shape, number and arrangement of the distribution holes 120 of each distribution region may be the same or different.

For example, the plurality of flow dividing regions may include a first flow dividing region 101 and a second flow dividing region 102, the first flow dividing region 101 may include a plurality of first flow dividing holes 121, and the second flow dividing region 102 may include a plurality of second flow dividing holes 122. The shape and area of the first shunt hole 121 are different from those of the second shunt hole 122. Also, in the first diverging region 101, a plurality of first diverging holes 121 may be arranged in a length direction of the diverging part; in the second diverging region 102, the plurality of second diverging holes 122 may be arranged in plural groups in the length direction of the diverging portion, and the plurality of second diverging holes 122 in each group may be arranged at intervals in the width direction of the diverging portion.

It is to be understood that the above is only an exemplary description and is not to be construed as limiting the present application, the number and arrangement of the first diverging holes 121 in the first diverging region 101 and the second diverging holes 122 in the second diverging region 102 may be specifically set according to the actual situation, for example, the first diverging region 101 may be provided with only one first diverging hole 121, and the first diverging holes 121 extend in the length direction of the diverging portion to form a strip-shaped hole; the second diverging region 102 may be provided with a plurality of second diverging holes 122, and the plurality of second diverging holes 122 may be configured as bar-shaped holes formed to extend in the width direction of the diverging part, and the plurality of second diverging holes 122 are arranged at intervals in the length direction of the diverging part.

The metal mesh 300 is constructed in a mesh structure to form a plurality of fine flow-guiding holes on the metal mesh 300. The metal mesh 300 may be attached to any one of the plurality of shunt areas, or may be attached to all of the shunt areas at the same time. Wherein the metal mesh 300 covers all the shunt holes 120 in the shunt area where it is attached.

Preferably, the metal mesh 300 may be attached to the diverging region having the large area aperture 120. For example, as shown in fig. 24, the area of the first diverging holes 121 of the first diverging region 101 is larger than the area of the second diverging holes 122 of the second diverging region 102, and the area of the second diverging holes 122 is smaller, so that the mixture can be split to some extent, and therefore the metal mesh 300 can be attached to only the first diverging region 101 and cover all the first diverging holes 121 of the first diverging region 101. From this, can play better reposition of redundant personnel effect to the gas mixture that flows through the great first reposition of redundant personnel hole 121 of area to avoid the gas mixture too high in combustion process intensity of burning, reduce the formation of nitrogen oxide among the combustion process, and be favorable to improving the stability of first reposition of redundant personnel hole 121 top flame.

In this embodiment, the metal mesh 300 is attached to the first flow dividing hole 121 of the first flow dividing region 101 of the flow dividing portion, because the metal mesh 300 is a mesh structure and has a plurality of fine flow guiding holes, a good flow dividing effect is provided for the mixture flowing through the airflow holes, which is beneficial to improving the stability of flame, and therefore the area of the first flow dividing hole 121 to which the metal mesh 300 is attached does not need to be small, so that the area of the first flow dividing hole 121 can be properly increased, and the overall flow passing area of the flow dividing portion is further improved. Therefore, the flow speed of the mixed gas flowing through the flow dividing part can be reduced, the mixed gas can be fully combusted, the content of nitrogen oxides in the combustion process is reduced, and the environmental protection performance of the fire grate 10 is improved.

Furthermore, by providing the expanded metal 300 in the first branch hole 121 of the branch portion, it is not necessary to provide a large number of strip-shaped branch holes 120 having a small area in the branch portion, and the area of the first branch hole 121 can be set to be large, thereby reducing the number of the first branch holes 121. Therefore, the structure of the shunting part is simple, the processing difficulty of the shunting part can be reduced, and the processing efficiency of the shunting part can be improved.

Therefore, the fire grate 10 according to the embodiment of the present application is advantageous to increase the area of the first flow dividing holes 121 and reduce the number of the first flow dividing holes 121, has advantages of simple structure, convenience in manufacturing, and low production cost, and can satisfy the requirement of low nitrogen emission.

As shown in fig. 22 and 23, in an embodiment, the flow dividing part is further provided with a second flow dividing region 102. The second diverging region 102 is provided with a plurality of second diverging holes 122, and the area of the second diverging holes 122 is smaller than that of the first diverging holes 121. For example, the first and second

flow dividing holes

121 and 122 may each be configured in a rectangular shape or a substantially rectangular shape, and the area of the first flow dividing hole 121 is larger than that of the second flow dividing hole 122.

In a specific example, the first flow dividing region 101 may be provided with a plurality of first flow dividing holes 121, and the plurality of first flow dividing holes 121 may be the same or different in shape. For example, in the example shown in the drawing, the area of the first diverging holes 121 located at the middle region may be larger, and the area of the first diverging holes 121 located adjacent to both sides may be correspondingly smaller, whereby the flame may be more intensively distributed at the middle region of the diverging portion and more loosely distributed at both side regions of the diverging portion. The metal mesh 300 may be attached to the inside or outside of the first shunting area 101 to cover all of the first shunting holes 121.

In another specific example, the first branch region 101 may also be provided with only one first branch hole 121, and the first branch hole 121 is configured to be rectangular and extends in the length direction of the branch portion. The metal mesh 300 may be attached to the inside or outside of the first diverging region 101 to cover the first diverging hole 121.

It is to be understood that the above is only an exemplary illustration and is not to be construed as a limitation of the present application, and the first and second

flow dividing holes

121 and 122 may be provided in any shape according to the actual situation, for example, may be circular, elliptical, or other shapes as long as it is satisfied that the area of the first flow dividing hole 121 is larger than that of the second flow dividing hole 122.

By setting the area of the first diverging holes 121 of the first diverging region 101 to be larger than the area of the second diverging holes 122 of the second diverging region 102, it is possible to increase the entire fire hole area of the diverging portion, reduce the heat intensity when the mixed gas is burned, improve the flue gas emission effect of the instantaneous combustion, and reduce the generation of nitrogen oxides. Furthermore, by disposing the metal mesh 300 in the first flow dividing region 101, the plurality of fine flow guiding holes on the metal mesh 300 can generate a flow dividing effect on the mixture gas of the first flow dividing holes 121, and improve the stability and uniformity of the flame above the first flow dividing holes 121.

As shown in fig. 22 and 23, in an embodiment, there are two second shunt areas 102 respectively disposed adjacent to both ends of the length direction of the shunt part, and the first shunt area 101 is disposed between the two second shunt areas 102.

It should be noted that the burner 1 generally requires a high combustion requirement in the central region. By disposing the first flow dividing region 101 having the first flow dividing holes 121 with a relatively large area adjacent to the central region of the flow dividing portion, it is advantageous to improve the combustion effect of the central region of the flow dividing portion. Furthermore, in the application scenario of the burner 1 having a plurality of fire rows 10, the second shunting areas 102 are two and are respectively disposed adjacent to two ends of the shunting portion in the length direction, which is beneficial for the flame to be transmitted between the ends of the adjacent fire rows 10 through the second shunting areas 102, so as to ensure the ignition effect of the plurality of fire rows 10.

As shown in fig. 22 and 23, in one embodiment, a plurality of second diverging holes 122 are arranged in an array, and the second diverging holes 122 have a bar shape.

For example, in the second diverging region 102, the plurality of second diverging holes 122 may be arranged in two groups in the width direction of the diverging portion, and the plurality of second diverging holes 122 in each group may be arranged at equal intervals in the length direction of the diverging portion. Preferably, the shape of the second diverging hole 122 is configured as a thin strip shape, and the length direction of the second diverging hole 122 is disposed parallel to the width direction of the diverging part. Thereby, the flame at the second branch flow holes 122 can be formed into a thin strip shape with the length direction parallel to the width direction of the branch portion, so that in an application scenario where the burner 1 has a plurality of fire rows 10, the reliability of flame transmission between adjacent fire rows 10 through the second branch flow region 102 can be further improved.

As shown in fig. 22 and 23, in an embodiment, the first flow dividing holes 121 are multiple and spaced apart from each other along the length direction of the flow dividing portion, and the support rib 12 is formed between two adjacent first flow dividing holes 121.

For example, the first diverging holes 121 may be provided in a rectangular shape, and a plurality of the first diverging holes 121 are provided at equal intervals in the length direction of the diverging part. Thus, the shape of the support rib 12 formed between the adjacent two first diverging holes 121 is rectangular. In addition, the shape of the support rib 12 may be defined according to the specific shape of the first flow dividing hole 121, and the width dimension of the support rib 12 may also be set according to the actual situation, which is not specifically limited in this application.

Through the above embodiment, the strength and stability of the whole structure of the flow dividing part are improved, so that the thermal deformation of the flow dividing part is reduced under the environment of long-term high temperature, and the durability and reliability of the whole structure of the fire grate 10 are improved.

As shown in the drawings, in an embodiment, two side edges of the flow dividing portion in the width direction are respectively provided with a vertical side plate, and two ends of the first flow dividing hole 121 respectively extend to the two vertical side plates.

For example, the two vertical side plates may be formed by bending portions on both sides in the width direction of the flow dividing portion, respectively. The expanded metal 300 may be bent to match the shape of the expanded metal 300 with the shape of the shunt part, thereby improving the adhesion of the expanded metal 300 to the shunt part.

Further, both ends of the first diverging hole 121 in the width direction of the diverging portion extend to the vertical side plates of the corresponding side, respectively. Thereby, on the one hand, the size of the first flow dividing hole 121 in the width direction of the flow dividing portion can be maximized, thereby further increasing the projected area of the first flow dividing hole 121 in the horizontal direction; on the other hand, the first branch holes 121 may form lateral flow guiding areas on the two vertical side plates, so that lateral flames are formed at the lateral flow guiding areas during combustion of the mixture, which is beneficial to further improving the flame stabilizing effect of the fire grate 10.

In one embodiment, as shown, the top 130 of the diverter is configured in cross-section to approximate a "V" shape. In other words, the central region of the top 130 of the flow dividing portion is depressed downward such that the top 130 of the flow dividing portion forms an obtuse angle with the opening direction upward. From this, can form the effect of gathering together in ascending orientation through the gas mixture that first reposition of redundant personnel hole 121 flows out, be favorable to improving the centralization of flame to can reduce the noise among the combustion process.

As shown in fig. 24, in one embodiment, a metal mesh 300 is welded to the inside of the shunt part.

Illustratively, the metal mesh 300 may be fixed to the inside of the diverging portion by spot welding. For example, the welding area 14 of the metal mesh 300 on the shunting part can be arranged on the inner side surfaces of the two vertical side plates and on the inner side surfaces of the support ribs 12, so that the welding area of the metal mesh 300 and the shunting part is increased, and the connection stability of the metal mesh 300 and the shunting part is improved.

It will be appreciated that by welding the expanded metal 300 to the inner side of the flow dividing part, the exposed area of the expanded metal 300 may be reduced, i.e. the expanded metal 300 is exposed only in the area of the corresponding first flow dividing hole 121. Therefore, the outer part of the fire grate 10 can be relatively neat, and the aesthetic property of the fire grate 10 is improved.

In one embodiment, the metal mesh 300 is made of a high temperature alloy.

Illustratively, the material of the metal mesh 300 may be iron-based superalloy, nickel-based superalloy, cobalt-based superalloy, or other alloys such as powder metallurgy superalloy.

Preferably, the metal mesh 300 may be made of fe-cr-al electrothermal alloy. Since the ferrochromium-alumium alloy has the characteristics of small density, good oxidation resistance, high heat-resistant temperature and the like, the metal mesh 300 can be lightened, the overall weight of the fire grate 10 can be reduced, and the durability and the reliability of the fire grate 10 can be further improved.

Referring to fig. 25 to 28, a fire grate 10 according to an embodiment of the present application will be described, and the fire grate 10 is applied to a burner 1. The combustor 1 may be a full premix combustor 1, a rich combustor 1, or a water-cooled combustor 1, or other types of combustors 1.

As shown in fig. 25-27, in an embodiment, the fire grate body 100 includes two side plates disposed in a snap-fit manner, the two side plates are respectively provided with a lateral convex hull 203, the lateral convex hull 203 is disposed adjacent to the top 130 of the side plates, and the top 130 of the lateral convex hull 203 is open to form a flame stabilizing hole 204.

Illustratively, a plurality of lateral convex hulls 203 are respectively arranged on the first side plate and the second side plate adjacent to the edge of the top 130, and the lateral convex hulls 203 are arranged at intervals along the length direction of the first side plate or the second side plate. The inner side of the lateral convex hull 203 defines a semi-closed flow channel communicating with the vent channel 110, and the top 130 of the semi-closed flow channel is open 211 forming a flame stabilizing hole 204. Wherein, two rows of flame stabilizing holes 204 on the first side plate and the second side plate are respectively located at two sides of the fire grate 10, and the two rows of flame stabilizing holes 204 are symmetrically distributed in the width direction of the fire grate 10.

Further, the flame stabilizing holes 204 of the first and second side plates may be disposed corresponding to the plurality of first branch holes 121. Wherein, the first diffluence hole 121 may be correspondingly provided with a plurality of flame stabilizing holes 204.

Therefore, in the combustion process, the side flames formed at the two rows of flame stabilizing holes 204 located at the two sides of the fire row 10 can play a role in stabilizing the flame formed above the fire row 10, so that the flame stability in the combustion process of the burner 1 is further improved.

As shown in fig. 25 and 27, the lateral convex hull 203 is optionally provided with an upwardly extending flame guide plate 205.

Illustratively, the flame guide plate 205 may be formed by extending the top edge of the lateral convex hull 203 upward and outward with respect to the horizontal direction. By arranging the flame guide plate 205 on the lateral convex hull 203, the lateral flame formed at the flame stabilizing hole 204 can be guided, so that the lateral flame gathers towards the central area of the fire grate 10, which is beneficial to improving the heat gathering effect in the combustion process.

26-28, in one embodiment, the top 130 of the fire row 10 is provided with a fire plate 206 extending horizontally outward.

Illustratively, the top portions 130 of the first side plate and the second side plate are respectively provided with a fire transfer plate 206, and the fire transfer plate 206 is arranged corresponding to the second flow dividing area 102 in the length direction of the top portion 130 of the fire grate body 100. The fire transmission plate 206 may be formed by bending a part of the top edges of the first side plate and the second side plate in the horizontal direction.

Further, in the application of the fire row 10 to the burner 1, the burner 1 comprises a plurality of fire rows 10 arranged side by side, and the ends of the fire transfer plates 206 of adjacent fire rows 10 are connected.

Through the above-described embodiment, the flames at the second flow dividing region 102 of the fire row 10 can be transferred to the second flow dividing region 102 of the fire row 10 of the adjacent fire row 10 through the fire transfer plate 206. Thereby, the ignition efficiency of the combustor 1 can be improved.

The utility model discloses still provide a combustor 1, this combustor 1 includes that aforementioned fire is arranged 10, and the concrete structure that this fire was arranged 10 refers to above-mentioned embodiment, because this combustor 1 has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer repeated here one by one. The combustor 1 may be a full premix combustor 1, a rich combustor 1, or a water-cooled combustor 1, or other types of combustors 1.

In one embodiment, as shown in fig. 28, the fire row 10 may be a plurality of fire rows arranged side by side. Wherein, two curb plates of two curb plates that fire row 10 includes the lock setting are equipped with side direction convex closure 203 respectively, and side direction convex closure 203 is close to the top 130 setting of curb plate, and the uncovered 211 in top 130 of side direction convex closure 203 forms steady flame hole 204.

In an embodiment, a plurality of lateral convex hulls 203 are respectively disposed on the first side plate and the second side plate near the edge of the top 130, and the lateral convex hulls 203 are arranged at intervals along the length direction of the first side plate or the second side plate. The inner side of the lateral convex hull 203 defines a flow channel in communication with the vent channel 110, the top 130 of which is open 211 forming a flame stabilizing hole 204. Wherein, two rows of flame stabilizing holes 204 on the first side plate and the second side plate are respectively located at two sides of the fire grate body 100, and the two rows of flame stabilizing holes 204 are symmetrically distributed in the width direction of the fire grate 10. During the combustion process, the side flames formed at the two rows of flame stabilizing holes 204 located at the two sides of the flame dividing device can stabilize the flame formed above the flame dividing device, so that the flame stability during the combustion process of the burner 1 is further improved.

In one embodiment, the flame guide plate 205 may be formed by extending the top edge of the lateral convex hull 203 upward and outward with respect to the horizontal direction. By arranging the flame guide plate 205 on the lateral convex hull 203, the lateral flame formed at the flame stabilizing hole 204 can be guided, so that the lateral flame gathers towards the central area of the fire grate 10, which is beneficial to improving the heat gathering effect in the combustion process.

The utility model discloses still provide a water heater, this water heater include aforementioned combustor 1, and this combustor 1 includes aforementioned fire row 10, and the concrete structure of this fire row 10 refers to above-mentioned embodiment, because this combustor 1 has adopted the whole technical scheme of all above-mentioned embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

Wherein, the water heater can be gas heater, hanging stove etc. hot water equipment. More illustratively, the water heater may be a forced-draft gas water heater.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A fire grate, comprising:

2. The fire row of claim 1 wherein the number of layers of metal mesh is multiple.

3. The fire grate of claim 2 wherein the top of the fire grate body is plate-shaped, the fire grate body having two side plates extending from the top to the same side of the fire grate body, the side plates defining the vent passage therebetween.

4. The fire grate of claim 3, wherein the two side plates are respectively provided with a lateral convex hull, the lateral convex hulls are arranged near the top of the side plates, and the top of the lateral convex hulls form flame stabilizing holes.

5. The fire grate of claim 4 wherein the top of the grate body is provided with a fire transfer plate extending horizontally outward.

6. The fire grate of claim 4 wherein the fire grate is a plurality of fire grates arranged side by side with the fire transfer plates of adjacent fire grates abutting.

7. The fire grate of claim 3, further comprising a flame holder, wherein the flame holder is sleeved on the upper portion of the fire grate body; a cavity with an open top surface is formed in the flame stabilizing device, a gap is formed between the side wall of the cavity and the surface of the fire grate body, and the gap is communicated with the ventilation channel.

8. The fire row of claim 7 wherein said side plate has air outlets for communicating said air passageway with said gap.

9. The fire grate of claim 8 wherein the flow area of the air outlets increases from the vent passage to the gap.

10. The fire grate of claim 2 wherein the metal mesh is attached to the inside of the flow divider.

11. The fire grate of claim 10 wherein in the plurality of layers of metal mesh, the edges of at least one layer of metal mesh are bent to form a bend.

12. The fire grate of claim 2 wherein the splitter openings comprise a first plurality of splitter openings and a second plurality of splitter openings, the second splitter openings having an area smaller than the area of the first splitter openings.

13. The fire grate of claim 12 wherein the first plurality of flow-dividing holes and the second plurality of flow-dividing holes are spaced apart along the length of the top of the fire grate body.

14. The fire row of claim 13 wherein the first plurality of flow splitting ports and the second plurality of flow splitting ports are alternately spaced along the length of the top of the fire row body.

15. The fire grate of claim 12 wherein the second splitter orifice comprises a plurality of sub-splitter orifices, the plurality of sub-splitter orifices being arranged along a width of the top of the fire grate body.

16. A burner comprising a fire grate as claimed in any one of claims 1 to 15.

17. A water heater comprising a burner as claimed in claim 16.