Fire grate and gas equipment
By designing the fire discharge structure of the shunt components and metal mesh in the burner, the problems of high flame strength and large nitrogen oxide emissions in traditional burners are solved, and the effects of uniform flame and low nitrogen emissions are achieved.
Patent Information
- Application Number
- CN202420674334.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The flame strength of traditional burners is high, and the flue gas emitted from instant combustion is poor, resulting in high nitrogen oxides and cannot meet the low nitrogen emission performance requirements.
A fire tray is designed. By setting up a shunt component and a metal mesh inside the fire tray body, the shunt component separates the airflow channel into multiple shunt channels. The metal mesh covers the air outlet, and jointly reduces the airflow speed, achieving uniform flame and reducing the flame height.
By reducing the flame height and improving the adequacy of combustion, the emission of nitrogen oxides is significantly reduced, meeting the requirements of low nitrogen emission performance.
Smart Images
Figure CN222703306U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas equipment, in particular to a burner and a gas equipment. Background Art
[0002] The burner is the core component of gas equipment.
[0003] In the related art, the flame intensity of the burner is high, and the flue gas emitted by instantaneous combustion has poor performance, resulting in high nitrogen oxides and failing to meet the low nitrogen emission performance requirements. Utility Model Content
[0004] The main purpose of the utility model is to provide a fire grate, which is intended to reduce the flame height, achieve full combustion, and reduce the emission of nitrogen oxides.
[0005] In order to achieve the above-mentioned purpose, the fire grate proposed by the utility model comprises:
[0006] A fire bar body, in which an air flow channel is formed, and the fire bar body is provided with an air inlet and an air outlet of the air flow channel;
[0007] a metal mesh covering the air outlet arrangement; and
[0008] The diversion component is arranged in the air flow channel and is located below the metal mesh; the diversion component divides the air flow channel into a plurality of diversion channels in the width direction of the fire bar body, and the plurality of diversion channels are all connected to the air outlet.
[0009] In one embodiment of the present application, the plurality of diversion channels include at least two first diversion channels and a plurality of second diversion channels, and the width of the first diversion channels is smaller than the width of the second diversion channels.
[0010] In one embodiment of the present application, the number of the first diversion channels is greater than the number of the second diversion channels.
[0011] In one embodiment of the present application, the diversion component and two side walls of the fire bar body in the width direction respectively form a first diversion channel; the second diversion channel is formed in the diversion component.
[0012] In one embodiment of the present application, the diversion component includes a plurality of diversion plates spaced apart along the width direction of the fire bar body;
[0013] The two outermost diverter plates are spaced apart from the corresponding side walls of the fire bar body to form the first diverter channel;
[0014] And / or, two adjacent diverter plates are spaced apart to form the first diverter channel or the second diverter channel.
[0015] In one embodiment of the present application, a connecting plate is connected between every two adjacent diverter plates, and the connecting plate is provided with ventilation holes.
[0016] In one embodiment of the present application, the diversion component further includes mounting plates connected to both sides of the diversion plate in the length direction, and the mounting plates are welded and fixed to the metal mesh and the fire bar body.
[0017] In one embodiment of the present application, the diversion component is an integrated structure.
[0018] In one embodiment of the present application, the fire bar further includes a speed reduction net arranged in the air flow channel, and the speed reduction net is arranged below the metal net at intervals.
[0019] In one embodiment of the present application, the fire bar further comprises two flame stabilizing plates respectively arranged on both sides of the fire bar body in the width direction, the two flame stabilizing plates are respectively spaced apart from the two side walls of the fire bar body to form a third flow channel, the side wall of the fire bar body is provided with a side air outlet connecting the air flow channel and the third flow channel, and the top of the third flow channel is provided with an opening;
[0020] The width of the third flow channel is smaller than the width of the second branch channel.
[0021] To achieve the above objectives, the present application also provides a gas device, including the above-mentioned fire grate.
[0022] In the fire grate of the utility model, an airflow channel is formed in the fire grate body, and the fire grate body is provided with an air inlet and an air outlet of the airflow channel, and the air outlet is covered with a metal mesh, which can achieve the purpose of uniform flame. By arranging a diversion component below the metal mesh, the diversion component can divide the airflow channel into multiple diversion channels in the width direction of the fire grate body, so that the airflow in the airflow channel can first be diverted to multiple diversion channels by the diversion component at a reduced speed, and then diverted and dispersed again by the metal mesh to further reduce the speed of the air ejected from the air outlet, thereby making the flame uniform and reducing the flame height, so that the combustion is more complete and the emission of nitrogen oxides is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0024] Figure 1 This is a structural schematic diagram of an embodiment of the fire grate of the utility model;
[0025] Figure 2 for Figure 1 A top view of an embodiment;
[0026] Figure 3 This is a schematic diagram of the internal structure of a fire grate according to an embodiment of the utility model;
[0027] Figure 4 for Figure 3 A schematic diagram of the structure of the diversion component in the embodiment;
[0028] Figure 5 This is a schematic diagram of the internal structure of another embodiment of the fire grate of the utility model;
[0029] Figure 6 for Figure 5 A schematic diagram of the structure of the diversion component in the embodiment;
[0030] Figure 7 This is a schematic diagram of the internal structure of another embodiment of the fire grate of the utility model;
[0031] Figure 8 for Figure 7 A schematic diagram of the structure of the diversion component in the embodiment;
[0032] Fig. 9 This is a schematic diagram of the internal structure of an embodiment of the utility model in which a speed reduction net is provided in the fire grate;
[0033] Fig.10 This is a schematic diagram of the internal structure of another embodiment of the fire grate of the utility model;
[0034] Fig.11 for Fig.10 A schematic diagram of the structure of the diversion component in the embodiment;
[0035] Fig.12 It is a schematic diagram of the structure of multiple fire bars coordinated in this embodiment.
[0036] Description of Figure Numbers:
[0037] Label name Label name 1 Fire row 142 Connecting plate 11 Fire row body 142a Ventilation holes 101 Air outlet 143 Mounting Plate 102 Air Inlet 15 Flame Stabilizer 103 Side air outlet 151 The third flow channel 12 Metal Mesh 151a Open 13 Speed reduction network A Airflow Channel 14 Diverter components A1 The first branch channel 141 Manifold A2 Second branch channel
[0038] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0041] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.
[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0043] The burner is the core component of the gas equipment, and a fire grate is installed inside the burner. In the traditional burner structure, the flame is usually stabilized by changing the shape of the fire outlet, but the gas outlet speed is fast, which can easily lead to excessively high flames, incomplete combustion, and high nitrogen oxide emissions.
[0044] Based on this, the utility model proposes a fire grate 1, which aims to reduce the air flow velocity by setting a diversion component 14 inside the fire grate body and combining it with a metal mesh 12, so as to achieve uniform flame, reduce flame height, and burn sufficiently to reduce the production of nitrogen oxides.
[0045] In the embodiment of the present utility model, Figures 1 to 4As shown, the fire bar includes a fire bar body 11, a metal mesh 12 and a diversion component 14. An airflow channel A is formed in the fire bar body 11, and the fire bar body 11 is provided with an air inlet 102 and an air outlet 101 of the airflow channel A; the metal mesh 12 is arranged to cover the air outlet 101; the diversion component 14 is arranged in the airflow channel A and is located below the metal mesh 12; the diversion component 14 divides the airflow channel A into a plurality of diversion channels in the width direction of the fire bar body 11, and the plurality of diversion channels are all connected to the air outlet 101.
[0046] The fire grate 1 is used on a burner, and the air inlet 102 of the air flow channel A in the fire grate body 11 is connected to an air flow source, and the air flow source includes air and gas. The gas and air enter the air flow channel A from the air inlet 102, and the gas and air are pre-mixed in the air flow channel A, and then ejected through the air outlet 101 of the fire grate body 11 and ignited to form a combustion flame. Optionally, the air outlet 101 may include a plurality of fire holes with the same or different areas and the same or different shapes. By covering the air outlet 101 with a metal mesh 12, the metal mesh 12 can play a role in breaking up the gas, so that the mixed gas can be fully burned after being ignited, forming a stable and uniform flame. In addition, the metal mesh 12 can also prevent safety accidents such as explosions caused by backfire.
[0047] By setting a diverter component 14 below the metal mesh 12, the diverter component 14 can divide the airflow channel A into multiple diverter channels in the width direction of the fire bar body 11. It can be understood that the diverter component 14 is set inside the airflow channel A. When the gas flows toward the gas outlet 101, the diverter component 14 can generate resistance to the airflow, thereby reducing the airflow speed; at the same time, the diverter component 14 can also break up the airflow and divert it to different diverter channels, so that the airflow distribution is more uniform. In this way, when the airflow flows from the air inlet 102 to the gas outlet 101, the airflow in the airflow channel A can first be diverted, dispersed and slowed down by the diverter component 14 to multiple diverter channels, and then flow to the metal mesh 12 for diversion, dispersion and deceleration again, and then flow out from the gas outlet 101 for combustion, thereby reducing the airflow ejection speed, which can reduce the flame height, make the combustion more complete, and reduce the emission of nitrogen oxides.
[0048] In practical applications, the specific structure of the flow dividing component 14 can be determined according to actual conditions, such as a plurality of spaced plate structures, a plurality of tube structures, a groove structure or other structures, etc. The number of flow dividing channels A divided by the flow dividing component 14 can be determined according to actual conditions, such as three, four, five, six or more.
[0049] In practical application, the metal mesh 12 can be located above or below the gas outlet 101. In order to further improve the uniformity of the flame, the number of layers of the metal mesh 12 can be multiple layers. The multiple layers of the metal mesh 12 can further disperse the air and the gas so that the gas and the air can be mixed evenly. At the same time, the multiple layers of the metal mesh 12 can increase the resistance and play a better anti-backfire effect. In practical application, the number of layers of the metal mesh 12 is related to the mesh number of the metal mesh 12. The metal mesh 12 with more meshes has fewer layers, and the metal mesh 12 with less meshes has more layers. For example, the number of layers of the metal mesh 12 can be 2 to 10 layers, specifically 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 7 layers, 8 layers, 9 layers or 10 layers. The mesh number of the metal mesh 12 can be 20 to 100 meshes, specifically 20 meshes, 40 meshes, 50 meshes, 60 meshes, 80 meshes or 100 meshes, etc. Considering that too many layers may result in insufficient airflow supply and that metal meshes with larger mesh sizes are expensive, as an example, the metal mesh 12 can be a combination of 2 to 5 layers of mesh and 20 to 50 meshes.
[0050] In the fire grate 1 of the utility model, an airflow channel A is formed in the fire grate body 11, and the fire grate body 11 is provided with an air inlet 102 and an air outlet 101 of the airflow channel A. The air outlet 101 is covered with a metal mesh 12, which can achieve the purpose of uniform flame. By arranging a diversion component 14 below the metal mesh 12, the diversion component 14 can divide the airflow channel A into multiple diversion channels in the width direction of the fire grate body 11, so that the airflow in the airflow channel A can be first diverted by the diversion component 14 to multiple diversion channels at a reduced speed, and then diverted and dispersed again by the metal mesh 12, so as to further reduce the speed of the air ejected from the air outlet 101, thereby being able to uniform the flame, reduce the flame height, make the combustion more complete, and reduce the emission of nitrogen oxides.
[0051] In one embodiment of the present application, Figure 3 , Figure 5 , Figure 7 as well as Fig.10 The plurality of diversion channels include at least two first diversion channels A1 and a plurality of second diversion channels A2, and the width of the first diversion channels A1 is smaller than the width of the second diversion channels A2.
[0052] In this embodiment, the diversion component 14 divides the airflow channel A into multiple diversion channels of different widths, wherein the width of the first diversion channel A1 is smaller than the width of the second diversion channel A2, so that the first diversion channel A1 forms a narrow channel structure, which can generate resistance to the airflow to further reduce the speed of the airflow.
[0053] Optionally, the number of the first branch channels A1 may be determined according to actual conditions, such as two, three, four, five or more.
[0054] Optionally, the number of the second branch channels A2 may be determined according to actual conditions, such as one, two, three, four or more.
[0055] In practical applications, the first flow diversion channels A1 and the second flow diversion channels A2 may be arranged alternately, regularly, or irregularly in the width direction of the fire bar body 11 .
[0056] In one embodiment of the present application, Figure 3 , Figure 5 , Figure 7 as well as Fig.10 , the number of the first branch channels A1 is greater than the number of the second branch channels A2.
[0057] With such an arrangement, the number of relatively narrow diversion channels is greater than the number of relatively wide diversion channels, which can further increase the airflow resistance and achieve a better speed reduction effect, thereby achieving a better flame stabilization effect.
[0058] In one embodiment of the present application, Figure 3 , Figure 5 , Figure 7 as well as Fig.10 The diversion component 14 and the two side walls of the fire bar body 11 in the width direction respectively form a first diversion channel A1; the second diversion channel A2 is formed in the diversion component 14.
[0059] In this embodiment, the diverter component 14 is spaced apart from the two side walls in the width direction of the fire bar body 11 to form a first diverter channel A1, so that the diverter channels with a narrower width are located in the two side areas of the airflow channel A, and the second diverter channel A2 is formed in the diverter component 14, so that the diverter channel with a wider width is located in the middle area of the airflow channel A. Such an arrangement can enable airflows of different flow rates to enter the metal mesh 12 for mixing and dispersion, thereby further reducing the airflow ejection speed.
[0060] In one embodiment of the present application, Figures 3 to 11 The diversion component 14 includes a plurality of diversion plates 141 spaced apart along the width direction of the fire bar body 11; the two outermost diversion plates 141 are spaced apart from the side walls of the corresponding fire bar body 11 to form a first diversion channel A1; and / or, the two adjacent diversion plates 141 in the middle are spaced apart to form a first diversion channel A1 or a second diversion channel A2.
[0061] This embodiment illustrates the structure of the flow diversion component 14, and the flow diversion component 14 includes a plurality of flow diversion plates 141 arranged at intervals. The two outermost flow diversion plates 141 may be arranged at intervals with the side walls of the corresponding fire bar body 11 to form a first flow diversion channel A1; or the first flow diversion channel A1 may be formed between two adjacent flow diversion plates 141. Of course, in some embodiments, a second flow diversion channel A2 may also be formed between two adjacent flow diversion plates 141.
[0062] It can be understood that whether the first diversion channel A1 or the second diversion channel A2 is formed in the diversion component 14 can be determined by the distance between two adjacent diversion plates 141, which can be determined according to actual conditions and is not limited here.
[0063] Furthermore, two adjacent diverter plates 141 may be connected via a connecting plate 142 , and vent holes 142 a are provided on the connecting plate 142 so that the airflow can smoothly pass through to the metal mesh 12 .
[0064] In this design, a connecting plate 142 is connected between each two adjacent diverter plates 141, so that multiple diverter plates 141 can be connected into an integral component, which is more convenient for installation. In addition, the connection between the connecting plate 142 and the diverter plates 141 can ensure the structural strength of the diverter component 14.
[0065] Furthermore, the diversion component 14 also includes mounting plates 143 connected to both sides of the diversion plate 141 in the length direction, and the mounting plates 143 are welded and fixed to the metal mesh 12 and the fire bar body 11 .
[0066] Such a design allows the flow dividing component 14 to be installed through the mounting plates 143 on both sides of the flow dividing plate 141 in the length direction, without occupying more internal space of the fire bar body 11, thus simplifying the structural design. In addition, fixing by welding can further improve assembly efficiency and installation reliability.
[0067] In one embodiment of the present application, the diverter component 14 is an integrated structure and can be formed by bending, stamping and other processes.
[0068] In practical applications, the number and positional relationship of the first diversion channels A1 and the second diversion channels A2 can be determined according to actual conditions.
[0069] As an example, Figures 3 to 6 A first diversion channel A1 is formed between the diversion component 14 and the two side walls of the fire bar body 11 , and a second diversion channel A2 is formed inside the diversion component 14 .
[0070] As an example, Figures 7 to 9A first diversion channel A1 is formed between the diversion component 14 and the two side walls of the fire bar body 11 , and two first diversion channels A1 and one second diversion channel A2 are formed inside the diversion component 14 .
[0071] As an example, Fig.10 and Fig.11 A first diversion channel A1 is formed between the diversion component 14 and the two side walls of the fire bar body 11 , and a first diversion channel A1 and two second diversion channels A2 are formed inside the diversion component 14 .
[0072] In one embodiment of the present application, Fig. 9 The fire bar 1 also includes a speed reduction net 13 arranged in the air flow channel A, and the speed reduction net 13 is arranged below the metal net 12 at intervals.
[0073] By adding a speed reduction net 13 below the top metal net 12, the airflow can be first slowed down and dispersed by the speed reduction net 13 when passing through the speed reduction net 13 below, and then flow to the top metal net 12 at a low speed to be slowed down and dispersed again, thereby further reducing the speed of the airflow ejection, reducing the flame height, and making the flame combustion more stable.
[0074] Optionally, the speed reducing net 13 can be arranged above or below the diversion component 14. The speed reducing net 13 can be installed in the air flow channel A through the diversion component 14, so that no additional installation components are required to install the speed reducing net 13, further saving material costs.
[0075] In one embodiment of the present application, Figure 3 , Figure 5 , Figure 7 as well as Fig.10 The fire bar 1 also includes two flame stabilizing plates 15 respectively arranged on both sides of the fire bar body 11 in the width direction. The two flame stabilizing plates 15 are respectively spaced apart from the two side walls of the fire bar body 11 to form a third flow channel 151. The side wall of the fire bar body 11 is provided with a side air outlet 103 connecting the air flow channel A and the third flow channel 151. The top of the third flow channel 151 is provided with an open opening 151a; the width of the third flow channel 151 is smaller than the width of the second diversion channel A2.
[0076] In this embodiment, two flame stabilizing sheets 15 are respectively arranged on both sides of the fire bar body 11, and the two flame stabilizing sheets 15 can be welded or riveted to the corresponding side walls of the fire bar body 11, and a third flow channel 151 is formed between each flame stabilizing sheet 15 and the corresponding side wall of the fire bar body 11. It can be understood that the two flame stabilizing sheets 15 extend upward and protrude from the top of the fire bar 1, which can play the role of flame guiding and flame stabilization, so that the side flames gather toward the target area of the fire bar, which is conducive to improving the heat gathering effect during the combustion process. The airflow in the airflow channel A can flow into the third flow channel 151 through the side air outlet 104, and then flow out from the open opening 151a at the top, which can increase the air output of the fire bar 1 and make the combustion flame more stable.
[0077] By setting the width of the third flow channel 151 to be smaller than the width of the second branch channel A2, the number of channels with relatively narrow widths is further increased, which can further reduce the ejection speed of the airflow and make the flame more uniform and stable.
[0078] The utility model also proposes a gas device, which includes a fire grate. The specific structure of the fire grate refers to the above embodiment. Since the gas device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0079] As an example, the combustion device may be a burner.
[0080] As an example, the combustion equipment may also be a gas water heater, a boiler or the like.
[0081] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A fire grate, characterized in that: include: A fire bar body, in which an air flow channel is formed, and the fire bar body is provided with an air inlet and an air outlet of the air flow channel; A metal mesh covering the air outlet; as well as The diversion component is arranged in the air flow channel and is located below the metal mesh; the diversion component divides the air flow channel into a plurality of diversion channels in the width direction of the fire bar body, and the plurality of diversion channels are all connected to the air outlet.
2. The fire bar according to claim 1, characterized in that: The plurality of diverter channels include at least two first diverter channels and a plurality of second diverter channels, and the width of the first diverter channels is smaller than the width of the second diverter channels.
3. The fire bar according to claim 2, characterized in that: The number of the first branch channels is greater than the number of the second branch channels.
4. The fire bar according to claim 3, characterized in that: The diversion component and two side walls of the fire bar body in the width direction respectively form a first diversion channel; the second diversion channel is formed in the diversion component.
5. The fire bar according to claim 4, characterized in that: The diversion component includes a plurality of diversion plates arranged at intervals along the width direction of the fire bar body; The two outermost diverter plates are spaced apart from the corresponding side walls of the fire bar body to form the first diverter channel; And / or, two adjacent diverter plates are spaced apart to form the first diverter channel or the second diverter channel.
6. The fire bar according to claim 5, characterized in that: A connecting plate is connected between every two adjacent diverter plates, and the connecting plate is provided with ventilation holes.
7. The fire bar according to claim 5, characterized in that: The diversion component also includes mounting plates connected to both sides of the diversion plate in the length direction, and the mounting plates are welded and fixed to the metal mesh and the fire bar body.
8. The fire bar according to any one of claims 1 to 7, characterized in that: The diverter component is an integrated structure.
9. The fire bar according to any one of claims 1 to 7, characterized in that: The fire bar also includes a speed reduction net arranged in the air flow channel, and the speed reduction net is arranged below the metal net at intervals.
10. The fire bar according to any one of claims 2 to 7, characterized in that: The fire bar further comprises two flame stabilizing plates respectively arranged on both sides of the fire bar body in the width direction, the two flame stabilizing plates are respectively spaced apart from the two side walls of the fire bar body to form a third flow channel, the side wall of the fire bar body is provided with a side air outlet connecting the air flow channel and the third flow channel, and the top of the third flow channel is provided with an opening; The width of the third flow channel is smaller than the width of the second branch channel.
11. A gas equipment, characterized in that: Comprising a fire bar as claimed in any one of claims 1 to 10.