Fire grate, burner and gas heating equipment

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a fire grate, a burner and gas heat supply equipment. The fire grate comprises an inner shell, an outer shell and an inner core assembly. The inner shell is provided with an injection channel and a first flame channel. The upper end of the first flame channel is open, and the lower end of the first flame channel communicates with the injection channel. The inner core assembly comprises a fire hole plate and a rectifying plate, the fire hole plate covers an opening in the upper end of the first flame channel and is provided with a plurality of first fire holes, the upper end of the rectifying plate is connected with the fire hole plate, and the lower end of the rectifying plate at least extends to the middle area of the first flame channel in the vertical direction. The rectifying plate divides the upper portion of the first flame channel into two rectifying flow channels arranged side by side in the first direction of the fire row, and the upper ends of the two rectifying flow channels communicate with the first fire hole. According to the fire grate disclosed by the utility model, the rectification effect on premixed gas in the first flame channel can be improved, and the flame combustion stability is improved, so that the operation reliability of a combustor and gas heating equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion, in particular to a fire grate, a burner and a gas heating device. Background Art

[0002] The burner is the core component of gas heating equipment such as gas water heaters and gas wall-mounted boilers. Its combustion characteristics such as combustion completeness and stability play a crucial role in the performance of the entire gas heating equipment.

[0003] The existing burners used in gas heating equipment are usually row burners, which include multiple fire rows arranged side by side. The fire row provided by the prior art usually includes an inner shell and an outer shell. The inner shell is surrounded by a light flame introduction channel, a rich flame introduction channel and a light flame premixing channel. The outer shell is sleeved on the outer side of the inner shell and surrounded by rich flame premixing channels on both opposite sides of the inner side. The lower end of the light flame premixing channel is connected to the light flame introduction channel, and the lower end of the rich flame premixing channel is connected to the rich flame introduction channel. The upper end of the rich flame premixing channel forms a rich flame hole. In order to control the size of the light flame hole, a fire hole plate is also provided at the upper end of the inner shell. The fire hole plate is provided with a light flame hole, and a plurality of light flame holes are arranged at intervals along the length direction of the fire row.

[0004] The fire grate provided by the prior art can realize the rich-lean combustion of the fire grate by controlling the air-fuel ratio of the premixed gas respectively introduced into the rich flame premixing channel and the light flame premixing channel, thereby reducing the nitrogen oxides generated during the combustion process. However, the fire grate provided by the prior art does not have a rectifying structure in the light flame premixing channel, which makes it difficult to control the flow rate of the premixed gas at the light flame hole, and is prone to flame separation. At the same time, it is also easy to cause the problem of high CO emissions due to the high flame temperature. Utility Model Content

[0005] One of the technical problems solved by the utility model is to provide a fire grate, which can effectively solve the problems of flame separation and high CO emission caused by the difficulty in controlling the flow rate at the fire hole of the existing fire grate, improve the stability of combustion, and reduce harmful substances generated by combustion.

[0006] The second technical problem solved by the utility model is to provide a burner which can effectively solve the problems of unstable combustion and high CO emissions of existing burners, improve the combustion stability of the burner, and reduce the emission of harmful substances when the burner is in use.

[0007] The third technical problem solved by the utility model is to provide a gas heating device, which can effectively solve the performance stability problem of the existing gas heating device caused by unstable burner combustion, and improve the reliability and safety of the gas heating device.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A fire grate, comprising:

[0010] An inner shell has an ejection channel and a first flame channel inside, wherein the first flame channel is open at the upper end and communicates with the ejection channel at the lower end;

[0011] The inner core component includes a fire hole plate and a rectifying plate. The fire hole plate is covered at the upper end opening of the first flame channel and is provided with a plurality of first fire holes. The upper end of the rectifying plate is connected to the fire hole plate and the lower end extends at least to the middle area of ​​the first flame channel in the vertical direction. The rectifying plate divides the upper part of the first flame channel into two rectifying flow channels arranged side by side along a first direction. The upper ends of the two rectifying flow channels are connected to the first fire holes. The first direction is the width direction of the fire row.

[0012] Compared with the background technology, the fire grate described in the utility model has the following beneficial effects: by arranging a rectifying plate in the first flame channel and the rectifying plate extending from the fire hole plate to at least the middle area of ​​the first flame channel, the rectifying plate can separate the upper part of the first flame channel into two rectifying flow channels, and the height of the rectifying flow channels in the vertical direction is at least half of the height of the first flame channel, so that the premixed gas in the first flame channel can be rectified by the rectifying plate to form two air flows when flowing upward, slowing down the flow rate of the premixed gas flowing out of the first flame channel, and making the premixed gas flow out of the rectifying flow channel more smoothly, effectively avoiding the occurrence of turbulence such as eddy currents in the flow of the premixed gas, thereby improving the flame combustion stability at the first fire hole, avoiding the flame separation problem caused by the excessively fast gas flow rate at the upper end of the first flame channel, and reducing the emission of nitrogen oxides and CO; at the same time, since the first fire hole is opened on the fire hole plate, the dimensional accuracy of the first fire hole is easy to control, avoiding the dimensional deviation of the first fire hole caused by assembly or other errors, and further improving the flame combustion stability at the first fire hole.

[0013] In one of the embodiments, the height of the first flame channel in the vertical direction is H, and the height of the rectifying plate in the vertical direction is h1, where h1 = 0.7H to 0.95H.

[0014] In one embodiment, two rectifier plates are stacked along the first direction, and the fire hole plate includes two fire hole sub-plates arranged side by side along the first direction, each of the fire hole sub-plates has a plurality of the first fire holes arranged at intervals along the second direction, and each of the fire hole sub-plates is connected to the upper end of the rectifier plate on the same side by a bend, and the second direction is the length direction of the fire row.

[0015] In one of the embodiments, each of the rectifying plates is provided with a plurality of rectifying convex hulls protruding outwardly, the plurality of rectifying convex hulls are arranged at intervals along the second direction, and the rectifying convex hulls of the two rectifying plates are arranged opposite to each other one by one.

[0016] In one embodiment, each of the fire hole sub-plates is provided with a plurality of fire hole groups spaced apart along the second direction, each of the fire hole groups includes a plurality of the first fire holes, and the rectifying convex hull is provided between two adjacent fire hole groups in the second direction;

[0017] And / or, the height of the rectifying convex hull along the vertical direction is h2, the height of the rectifying plate in the vertical direction is h1, and h2=0.4h1-0.9h1.

[0018] In one embodiment, two opposite sides of the inner shell are inwardly recessed to form an inner shell profile, the inner shell profile is spaced apart from the rectifier plate, and the lower end of the inner shell profile is higher than the lower end of the rectifier plate;

[0019] And / or, the fire grate includes an outer shell, which is sleeved on the outer side of the inner shell and respectively encloses two second flame channels with the two opposite outer side walls of the inner shell, and the upper port of the second flame channel forms a second fire hole; the introduction channel includes a separated first introduction channel and a second introduction channel, the lower end of the first flame channel is connected to the first introduction channel, and the second introduction channel is connected to the second flame channel.

[0020] In one embodiment, the lower ends of the two rectifier plates are integrally bent;

[0021] Alternatively, the lower end of one of the rectifier plates is bent upward to form a clamping groove, and the lower end of the other rectifier plate is inserted into the clamping groove.

[0022] In one embodiment, the fire hole plate is arranged horizontally;

[0023] Alternatively, the fire hole plate is in an upper open V-shaped structure, a plurality of the first fire holes are arranged on both sides of the V-shaped structure, and the upper end of the rectifying plate is connected to the sharp corner of the V-shaped structure.

[0024] The above second technical problem is solved by the following technical solution:

[0025] A burner comprises the fire grate in any one of the above embodiments.

[0026] Compared with the background technology, the burner described in the utility model has the beneficial effects that by adopting the above-mentioned fire grate, the stability and reliability of the burner combustion can be improved, and the harmful substances generated during the combustion process can be reduced, thereby improving the safety of the burner.

[0027] The third technical problem mentioned above is solved by the following technical solution:

[0028] A gas heating device comprises the above-mentioned burner.

[0029] Compared with the background technology, the gas heating equipment described in the utility model has the following beneficial effects: by adopting the above-mentioned burner, the operating stability and safety of the gas heating equipment can be improved, and the user experience of the gas heating equipment can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of the fire grate provided in the first embodiment of the utility model;

[0031] Figure 2 A cross-sectional view of a fire bar provided in Embodiment 1 of the present utility model;

[0032] Figure 3 A front view of the inner half shell provided in the first embodiment of the utility model;

[0033] Figure 4 A cross-sectional view of a local structure of a fire grate provided in Embodiment 1 of the utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the inner core assembly provided in the first embodiment of the utility model;

[0035] Figure 6 A partial structural cross-sectional view of the fire grate provided in the second embodiment of the utility model;

[0036] Figure 7 A schematic diagram of the structure of the fire grate provided in the third embodiment of the present utility model;

[0037] Figure 8 for Figure 7 A partial enlarged view of point I in the middle;

[0038] Fig. 9 This is a partial structural sectional view of the fire grate provided in Example 3 of the utility model.

[0039] Description of labels:

[0040] 1. Inner shell; 11. Inner half shell; 12. Injection channel; 12a. First injection channel; 12b. Second injection channel; 13. Inner shell profile; 14. First flame channel; 141. Rectification channel;

[0041] 2. Inner core assembly; 21. Fire hole plate; 211. Fire hole sub-plate; 2111. First fire hole; 22. Rectifier plate; 22a. First rectifying plate; 22b. Second rectifying plate; 221. Rectifier convex hull; 222. Upper plate portion; 223. Lower plate portion; 224. Clamping portion; 23. Positioning plate portion;

[0042] 3. Outer shell; 31. Outer half shell; 32. Connecting bridge;

[0043] 4. The second flame channel; 5. The second flame hole. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] Embodiment 1

[0049] The present embodiment provides a fire grate which can be used in a burner and can realize rich and lean combustion while controlling the speed at which the premixed gas flows out of the fire hole by rectifying the premixed gas in the flame channel, thereby improving the combustion sufficiency and stability and reducing the generation of nitrogen oxides and CO during the combustion process.

[0050] For the convenience of description, the width direction of the fire bar is defined as the first direction, the length direction is defined as the second direction, the first direction is perpendicular to the second direction, and the first direction and the second direction are perpendicular to the vertical direction.

[0051] like Figure 1 and Figure 2 As shown, in this embodiment, the fire bar includes an inner shell 1, an outer shell 3 and an inner core assembly 2. The inner shell 1 has an introduction channel 12 and a first flame channel 14, the first flame channel 14 is open at the upper end and connected to the introduction channel 12 at the lower end; the inner core assembly 2 includes a fire hole plate 21 and a rectifying plate 22, the fire hole plate 21 covers the upper end opening of the first flame channel 14 and has a plurality of first fire holes 2111, the upper end of the rectifying plate 22 is connected to the fire hole plate 21 and the lower end extends at least to the middle area of ​​the first flame channel 14 in the vertical direction, and the rectifying plate 22 separates the upper part of the first flame channel 14 Two rectifying flow channels 141 are arranged side by side along the first direction, and the upper ends of the two rectifying flow channels 141 are connected to the first fire hole 2111; the outer shell 3 is sleeved on the upper outer part of the inner shell 1, and the inner side wall of the outer shell 3 and the two opposite outer sides of the inner shell 1 are respectively surrounded to form second flame channels 4, the upper ends of the two second flame channels 4 are open and the lower ends are connected to the injection channel 12, the upper ports of the second flame channels 4 form the second fire hole 5, and the air-fuel ratio of the premixed gas in the first flame channel 14 and the second flame channel 4 is different. The first direction is the width direction of the fire bar.

[0052] The fire bar provided in the present embodiment is provided with a rectifying plate 22 in the first flame channel 14, and the rectifying plate 22 extends from the fire hole plate 21 to at least the middle area of ​​the first flame channel 14, so that the rectifying plate 22 can separate the upper part of the first flame channel 14 into two rectifying flow channels 141, and the height of the rectifying flow channel 141 in the vertical direction is at least half of the height of the first flame channel 14, so that the premixed gas in the first flame channel 14 can be rectified by the rectifying plate 22 to form two air flows when flowing upward, slowing down the flow velocity of the premixed gas flowing out of the first flame channel 14, and making the premixed gas flow out of the rectifying flow channel 141 more smoothly, effectively avoiding the occurrence of turbulence such as eddy currents in the premixed gas during the flow process, thereby improving the first fire hole 2111 The flame combustion stability is improved, and the flame separation problem caused by the excessively fast gas flow rate at the upper end of the first flame channel 14 is avoided, thereby reducing the emission of nitrogen oxides and CO. At the same time, since the first fire hole 2111 is opened on the fire hole plate 21, the dimensional accuracy of the first fire hole 2111 is easy to control, thereby avoiding the dimensional deviation of the first fire hole 2111 due to assembly or other errors, and further improving the flame combustion stability at the first fire hole 2111. Furthermore, since the air-fuel ratio of the premixed gas in the first flame channel 14 and the second flame channel 4 is different, the second fire hole 5 formed at the upper end of the first flame hole 2111 and the second flame channel 4 respectively forms a rich fire hole and a lean fire hole, thereby realizing rich-lean combustion, reducing the content of nitrogen oxides produced by combustion, and improving the completeness of combustion.

[0053] It is worth noting that one of the first fire hole 2111 and the second fire hole 5 is a light flame hole, and the other is a rich flame hole, so as to realize the light and rich combustion of the fire row. Light flame combustion requires more air, and rich flame combustion requires relatively less air, that is, the air-fuel ratio of the mixed gas in the light flame hole is greater than the air-fuel ratio of the mixed gas in the rich flame hole. As a result, the light flame burns under too much air, and the light flame is wrapped by too much air to reduce the temperature, while the rich flame is incompletely burned under oxygen-deficient conditions to reduce the temperature of the rich flame, thereby reducing the flame temperature as a whole, and then reducing the generation of nitrogen oxides; at the same time, since the two second flame holes are located on both sides of the first flame hole, the fuel that is not fully burned in the rich flame can be further burned with the excess air in the light flame, thereby ensuring the full combustion of the fuel, reducing CO emissions while improving the utilization rate of the gas.

[0054] In one embodiment, the first fire hole 2111 is a light flame hole, and the second fire hole 5 is a thick flame hole. In other embodiments, the first fire hole 2111 may be a thick flame hole, and the second fire hole 5 may be a light flame hole. In other embodiments, the fire bar may not be provided with an outer shell 3.

[0055] In one embodiment, the introduction channel 12 includes a first introduction channel 12a and a second introduction channel 12b, and the first introduction channel 12a and the second introduction channel 12b are respectively formed with an introduction port on the same side of the fire bar. The lower end of the first flame channel 14 is connected to the first introduction channel 12a, and the lower end of the second flame channel 4 is connected to the second introduction channel 12b. The air-fuel ratio of the mixed gas formed by the introduction of the first introduction channel 12a and the second introduction channel 12b is different. By separately setting the first introduction channel 12a and the second introduction channel 12b, it is beneficial to control the amount of gas entering the first introduction channel 12a and the second introduction channel 12b respectively, and then control the air-fuel ratio in the first flame channel 14 and the second flame channel 4, thereby improving the flexibility of air-fuel ratio regulation.

[0056] In another embodiment, the inner shell 1 may be provided with only one injection channel 12, that is, the lower ends of the first flame channel 14 and the second flame channel 4 are connected to the same injection channel 12, and an air hole is provided on the outer wall of the outer shell 3, and the air hole is connected to the corresponding second flame channel 4, so that external air can pass through the air hole and then into the second flame channel 4, thereby mixing with the mixed gas entering the second flame channel 4, increasing the air amount of the mixed gas in the second flame channel 4, so that the air-fuel mixture in the second flame channel 4 and the first flame channel 14 are different.

[0057] It is understandable that there are many configurations in the prior art to achieve different air-fuel ratios in the first flame channel 14 and the second flame channel 4, and all of them can be applied to the present invention, and the present invention does not limit or elaborate on them.

[0058] The two inner half shells 11 are press-fitted at both ends along the second direction and sandwiched between the corresponding ends of the two outer half shells 31. It is worth noting that the manner and specific structure of the two inner half shells 11 enclosing and forming the first injection channel 12a, the second injection channel 12b and the first flame channel 14 can be set with reference to the prior art, and the connection between the outer shell 3 and the inner shell 1 can be set with reference to the prior art, which is not the focus of the present utility model and will not be described in detail this time.

[0059] like Figure 3 and Figure 4As shown, in one embodiment, the height of the first flame channel 14 in the vertical direction is H, and the height of the rectifying plate 22 in the vertical direction is h1, where h=0.7H~0.95H. This arrangement allows the lower end of the rectifying plate 22 to extend to the lower part of the first flame channel 14, thereby increasing the height of the rectifying channel 141 in the vertical direction as much as possible, so that the premixed gas entering the first flame channel 14 from the first injection channel 12a can enter the rectifying channel 141 more quickly for rectification, thereby enhancing the rectifying effect of the rectifying channel 141 on the premixed gas; at the same time, since the premixed gas flows along a longer path in the rectifying channel 141, the flow velocity of the premixed gas flowing out of the rectifying channel 141 is more stable, further improving the combustion stability at the first fire hole 2111.

[0060] In order to improve the assembly reliability of the inner core component 2 in the first flame channel 14, the fire hole plate 21 has positioning plate portions 23 extending downward at both ends along the first direction, and the positioning plate portions 23 abut against the inner side wall of the inner shell 1, thereby ensuring the assembly reliability of the inner core component 2 and the inner shell 1 in the first direction; at the same time, since the positioning plate portions 23 abut against the inner side wall of the inner shell 1, it can also prevent the upper end of the inner shell 1 from sinking inward, thereby improving the structural stability of the entire fire bar. In another embodiment, the positioning plate portion 23 can also abut against the outer side wall of the inner shell 1, and the upper end of the inner shell 1 can abut against the lower side of the fire hole plate 21.

[0061] Furthermore, a vertically arranged end plate portion is formed at the upper end of each inner half shell 11 . The end plate portion is parallel to and spaced from the rectifying plate 22 , and the inner side surface of the end plate portion abuts against the outer side surface of the positioning plate portion 23 .

[0062] In one embodiment, the upper end of each inner half shell 11 is inwardly recessed to form an inner shell profile 13, the inner shell profile 13 is spaced apart from the rectifying plate 22, and the lower end of the inner shell profile 13 is higher than the lower end of the rectifying plate 22, and the inner shell profile 13 extends to both ends of the inner shell along the second direction. The setting of the inner shell profile 13 can make the rectifying flow channel 141 have a narrowing area, which can appropriately increase the flow rate of the premixed gas flowing to the upper end of the rectifying flow channel 141; at the same time, because the upper end width of the rectifying flow channel 141 is greater than the width of the rectifying flow channel 141 at the inner shell profile 13, the premixed gas flowing out of the narrowing area of ​​the rectifying flow channel 141 can be smoothed in the upper end area of ​​the rectifying flow channel 141, ensuring the stability of the premixed gas flowing out of the first fire hole 2111.

[0063] like Figure 4 and Figure 5As shown, in one embodiment, two rectifying plates 22 are stacked in the first direction, which can increase the overall structural strength and rigidity of the inner core component 2, reduce the probability of deformation of the rectifying plates 22, and facilitate control of the shape of the rectifying flow channel 141; at the same time, the provision of two rectifying plates 22 is conducive to achieving the connection between the rectifying plates 22 and the fire hole plates 21, reducing the processing difficulty of the inner core component 2.

[0064] In order to simplify the processing of the inner core component 2, in one embodiment, the fire hole plate 21 includes two fire hole sub-plates 211 arranged side by side along the first direction, each fire hole sub-plate 211 is provided with a plurality of first fire holes 2111 spaced apart along the second direction, and the upper end of each fire hole sub-plate 211 is bent and connected to the upper end of the rectifier plate 22 on the same side. That is, one fire hole sub-plate 211 is bent and formed integrally with one rectifier plate 22, and the other fire hole sub-plate 211 is bent and formed with the other rectifier plate 22, thereby simplifying the processing of the fire hole sub-plate 211, and simplifying the connection between the rectifier plate 22 and the fire hole plate 21, and reducing the processing difficulty of the inner core component 2. Furthermore, each fire hole sub-plate 211 has a positioning plate portion 23 bent downward at one end away from the other fire hole sub-plate 211.

[0065] The first fire holes 2111 on the two fire hole sub-plates 211 are arranged one by one in the second direction to ensure the stability of flame combustion. In one embodiment, the two inner half shells 11 are symmetrically arranged relative to a symmetry plane, and the two fire hole sub-plates 211 are symmetrically arranged relative to the symmetry plane, and the symmetry plane passes between the two rectifying plates 22. This arrangement makes the shapes of the two rectifying flow channels 141 roughly consistent, and the first fire holes 2111 on the two fire hole sub-plates 211 can be symmetrically arranged, which can effectively ensure the rectification effect and the stability of combustion.

[0066] In one embodiment, one end of each first fire hole 2111 facing another fire hole sub-plate 211 passes through the fire hole sub-plate 211 and extends downward to the rectifying plate 22 to increase the size of the first fire hole 2111 and thereby increase the flame area at the first fire hole 2111 .

[0067] In one embodiment, a plurality of fire hole groups are arranged on each fire hole sub-plate 211 at intervals along the second direction, and each fire hole group includes two first fire holes 2111 evenly spaced along the second direction, and the spacing between two adjacent first fire holes 2111 in the same fire hole group is d1, and the spacing between two adjacent first fire holes 2111 in two adjacent fire hole groups is d2, d2>d1, thereby enabling the plurality of first fire holes 2111 to be grouped in the second direction, thereby increasing the heat dissipation area of ​​the first fire holes 2111, reducing the temperature of the flame combustion at the first fire holes 2111, and thereby reducing the amount of nitrogen oxides generated.

[0068] Furthermore, a connecting bridge 32 is connected between the top ends of the two outer half shells 31, and a plurality of connecting bridges 32 are arranged at intervals along the second direction. Several fire hole groups arranged side by side along the second direction form a large fire hole group, and the plurality of large fire hole groups are arranged in sequence along the second direction, and the spacing between two adjacent large fire hole groups is greater than the spacing between two adjacent large fire hole groups in the same large fire hole group. In the second direction, the connecting bridge 32 is located between two adjacent large fire hole groups, so that the spacing between two adjacent large fire hole groups can be better adapted to the width of the connecting bridge 32, avoiding the connecting bridge 32 from blocking the first fire hole 2111, and also improving the flexibility of setting the spacing between two adjacent large fire hole groups in the same large fire hole group.

[0069] In one embodiment, the first fire hole 2111 is a rectangular fire hole, and the length of the rectangular fire hole along the first direction is greater than the width of the rectangular fire hole along the second direction, so as to reduce the difficulty of processing the rectangular fire hole and increase the area of ​​the first fire hole 2111. The width of the first fire hole 2111 along the second direction is preferably 0.5 mm to 1.5 mm, and the length of the first fire hole 2111 along the first direction is less than 0.7 times the length of the fire hole sub-plate 211 in the first direction, so that the portion of the fire hole sub-plate 211 between the outer end of the first fire hole 2111 and the inner side wall of the inner shell 1 forms a separation structure separating the first fire hole 2111 and the second fire hole 5, so as to avoid the flame at the first fire hole 2111 and the flame at the second fire hole 5 from interfering with each other. In other embodiments, the first fire hole 2111 can also be elliptical, V-shaped, circular or other shapes.

[0070] In order to reduce the difficulty of processing the inner core component 2, in one embodiment, the lower ends of the two rectifier plates 22 are bent and connected, so that the inner core component 2 as a whole can be formed by bending the sheet metal structure in one piece, simplifying the structure of the inner core component 2 and reducing the difficulty of processing and assembling the inner core component 2. In other embodiments, the two rectifier plates 22 can also be connected by welding, riveting or other methods.

[0071] In one embodiment, each rectifying plate 22 is provided with a plurality of rectifying convex bumps 221 protruding outward, and a plurality of rectifying convex bumps 221 are arranged at intervals along the second direction, and the rectifying convex bumps 221 on the two rectifying plates 22 are arranged opposite to each other. The arrangement of the rectifying convex bumps 221 can enhance the structural strength and rigidity of the rectifying plate 22, reduce the probability of deformation of the rectifying plate 22, thereby ensuring the rectifying and stabilizing airflow of the rectifying plate 22; at the same time, the arrangement of the rectifying convex bumps 221 also makes the rectifying flow channel 141 narrow at the rectifying convex bumps 221, which is conducive to controlling the flow velocity of the premixed gas flowing through the rectifying convex bumps 221, and further improving the rectifying effect of the premixed gas flowing out of the first fire hole 2111.

[0072] The rectifying convex hump 221 is preferably a long strip structure extending in the vertical direction to increase the vertical action range of the rectifying convex hump 221. The height of the rectifying convex hump 221 in the vertical direction is h2, where h2 = 0.4h1 to 0.9h1.

[0073] In order to improve the rectification effect, a rectifying bulge 221 is arranged between two adjacent fire hole groups, so that when the premixed gas flows through the rectifying bulge 221, the premixed gas is guided to flow to both sides of the rectifying bulge 221 along the second direction, that is, the premixed gas is guided to flow to the fire hole groups on both sides of the rectifying bulge 221.

[0074] The utility model also provides a burner, including the fire grate in any of the above embodiments. By adopting the above fire grate, the combustion sufficiency and stability of the burner can be improved, the nitrogen oxides generated during the combustion process can be reduced, and the structure of the burner can be simplified, reducing the processing cost of the burner.

[0075] The utility model also provides a gas heating device, comprising the above-mentioned burner. By adopting the above-mentioned burner, the operation stability and reliability of the gas heating device can be improved, the harmful gas generated during the operation of the gas heating device can be reduced, and the cost of the gas heating device can be reduced.

[0076] Embodiment 2

[0077] This embodiment provides a fire bar, and the structure of the fire bar provided in this embodiment is basically the same as that in the first embodiment, and only some of the configurations are different. This embodiment will not repeat the same structure as that in the first embodiment.

[0078] like Figure 6 As shown, in this embodiment, the two rectifier plates 22 are separately arranged, and the lower end of one rectifier plate 22 is folded upward to form a clamping portion 224, and a clamping groove is formed between the clamping portion 224 and the main structure of the rectifier plate 22, and the lower end of the other rectifier plate 22 is inserted into the clamping groove, that is, the lower end of one rectifier plate 22 is wrapped by the other rectifier plate 22 to achieve the connection between the lower ends of the two rectifier plates 22.

[0079] The fire bar provided in this embodiment enables the two rectifier plates 22 to be processed separately, thereby reducing the difficulty of processing the rectifier plates 22 .

[0080] For the convenience of description, the two rectifier plates 22 are respectively referred to as the first rectifier plate 22a and the second rectifier plate 22b. Each rectifier plate 22 includes an upper plate portion 222 and a lower plate portion 223 that are bent and connected. The upper plate portions 222 and the lower plate portions 223 of the two rectifier plates 22 are correspondingly arranged and fit each other. The lower end of the lower plate portion 223 of the first rectifier plate 22a is bent and connected with a clamping portion 224. The clamping portion 224 and the lower plate portion 223 of the first rectifier plate 22a are surrounded to form a clamping groove. The lower plate portion 223 of the second rectifier plate 22b is inserted in the clamping groove, and the lower plate portion 223 of each rectifier plate 22 The relative upper plate portion 222 is offset in a direction away from the clamping portion 224, so that the outer side surface of the lower plate portion 223 on the first rectifying plate 22a can be close to the outer side surface of the rectifying bulge 221 on the first rectifying plate 22a, and the outer side surface of the clamping portion 224 can be close to the outer side surface of the rectifying bulge 221 on the second rectifying plate 22b, which is beneficial for the lower end of the entire inner core component 2 in the middle of the first direction to be directly opposite to the middle position of the first flame channel 14 in the first direction, thereby reducing the probability of turbulence generated when the premixed gas flows upward through the lower end of the inner core component 2, thereby ensuring the rectifying effect of the inner core component 2.

[0081] The utility model also provides a burner, comprising the above-mentioned fire grate. By adopting the above-mentioned fire grate, the combustion sufficiency and stability of the burner can be improved, the nitrogen oxides generated during the combustion process can be reduced, the structure of the burner can be simplified, and the processing cost of the burner can be reduced.

[0082] The utility model also provides a gas heating device, comprising the above-mentioned burner. By adopting the above-mentioned burner, the operation stability and reliability of the gas heating device can be improved, the harmful gas generated during the operation of the gas heating device can be reduced, and the cost of the gas heating device can be reduced.

[0083] Embodiment 3

[0084] This embodiment provides a fire bar, and the fire bar provided in this embodiment has a structure that is basically the same as that in the above embodiment, with only some differences in settings. This embodiment will no longer repeat the same contents as those in the above embodiment.

[0085] like Figures 7 to 9 As shown, in this embodiment, the fire hole plate 21 is in a V-shaped structure, and first fire holes 2111 are arranged on both sides of the V-shaped structure, and the upper end of the rectifying plate 22 is connected to the angle of the V-shaped structure. This arrangement enables the flames at the first fire holes 2111 on both sides to cross and collide with each other, further improving the flame stability at the first fire holes 2111 and improving the flame combustion sufficiency at the first fire holes 2111.

[0086] In this embodiment, the included angle of the V-shaped structure is preferably 120° to 150°.

[0087] Furthermore, the two fire hole sub-plates 211 respectively form two sides of the V-shaped structure, and the first fire holes 2111 on the two fire hole sub-plates 211 are preferably arranged at intervals in the first direction.

[0088] Furthermore, each fire hole sub-plate 211 is bent and connected to the corresponding rectifying plate 22. It is worth noting that in this embodiment, the two rectifying plates 22 can be connected by the structure in the first embodiment or the structure in the second embodiment, and this embodiment does not limit this.

[0089] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A fire grate, characterized in that: The fire row comprises: An inner shell (1) has an ejection channel (12) and a first flame channel (14) inside, wherein the first flame channel (14) is open at the upper end and communicates with the ejection channel (12) at the lower end; An inner core component (2) comprises a fire hole plate (21) and a rectifying plate (22); the fire hole plate (21) is covered at the upper end opening of the first flame channel (14) and is provided with a plurality of first fire holes (2111); the upper end of the rectifying plate (22) is connected to the fire hole plate (21) and the lower end extends at least to the middle area of ​​the first flame channel (14) in the vertical direction; the rectifying plate (22) divides the upper part of the first flame channel (14) into two rectifying flow channels (141) arranged side by side in a first direction; the upper ends of the two rectifying flow channels (141) are both connected to the first fire holes (2111); the first direction is the width direction of the fire row.

2. The fire bar according to claim 1, characterized in that: The height of the first flame channel (14) in the vertical direction is H, and the height of the rectifying plate (22) in the vertical direction is h1, where h1=0.7H-0.95H.

3. The fire bar according to claim 1, characterized in that: Two rectifier plates (22) are stacked along the first direction, the fire hole plate (21) comprises two fire hole sub-plates (211) arranged side by side along the first direction, each of the fire hole sub-plates (211) is provided with a plurality of the first fire holes (2111) at intervals along the second direction, and each of the fire hole sub-plates (211) is bent and connected to the upper end of the rectifier plate (22) on the same side, and the second direction is the length direction of the fire row.

4. The fire bar according to claim 3, characterized in that: Each rectifying plate (22) is provided with a plurality of rectifying convex hulls (221) protruding outwards, the plurality of rectifying convex hulls (221) are arranged at intervals along the second direction, and the rectifying convex hulls (221) of the two rectifying plates (22) are arranged opposite to each other one by one.

5. The fire bar according to claim 4, characterized in that: Each of the fire hole sub-plates (211) is provided with a plurality of fire hole groups spaced apart along the second direction, each of the fire hole groups includes a plurality of the first fire holes (2111), and in the second direction, a rectifying convex hull (221) is provided between two adjacent fire hole groups; And / or, the height of the rectifying convex hull (221) in the vertical direction is h2, the height of the rectifying plate (22) in the vertical direction is h1, and h2=0.4h1-0.9h1.

6. The fire bar according to any one of claims 1 to 5, characterized in that: The inner shell (1) has two opposite sides that are inwardly recessed to form an inner shell profile (13), the inner shell profile (13) is spaced apart from the rectifying plate (22), and the lower end of the inner shell profile (13) is higher than the lower end of the rectifying plate (22); And / or, the fire bar comprises an outer shell (3), the outer shell (3) is sleeved on the outer side of the inner shell (1) and respectively encloses two opposite outer side walls of the inner shell (1) to form two second flame channels (4), and the upper end of the second flame channel (4) forms a second fire hole (5); the ejection channel (12) comprises a first ejection channel (12a) and a second ejection channel (12b) separated from each other, the lower end of the first flame channel (14) is connected to the first ejection channel (12a), and the second ejection channel (12b) is connected to the second flame channel (4).

7. The fire bar according to any one of claims 3 to 5, characterized in that: The lower ends of the two rectifying plates (22) are integrally bent and formed; Alternatively, the lower end of one of the rectifying plates (22) is bent upward to form a clamping groove, and the lower end of the other rectifying plate (22) is inserted into the clamping groove.

8. The fire bar according to any one of claims 1 to 5, characterized in that: The fire hole plate (21) is arranged horizontally; Alternatively, the fire hole plate (21) is in an upper open V-shaped structure, a plurality of the first fire holes (2111) are provided on both sides of the V-shaped structure, and the upper end of the rectifying plate (22) is connected to the sharp corner of the V-shaped structure.

9. A burner, characterized in that: Comprising the fire grate as described in any one of claims 1-8.

10. A gas heating device, characterized in that: Comprising the burner as claimed in claim 9.

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