Combustor adaptable to hydrogen-doped natural gas water heater

Abstract

The utility model provides an adaptable hydrogen-doped natural gas water heater burner, which belongs to the technical field of gas water heater burners, and is characterized in that a plurality of first openings and a plurality of second openings are formed in a first fire cover on one side of an injection outlet, and a plurality of third openings and a plurality of fourth openings are formed in a second fire cover on the other side of the injection outlet; the first opening is communicated with the third opening to form a main fire hole; the second opening and the edge of the second fire cover jointly define an auxiliary fire hole located on the side of the first fire cover. The fourth opening and the edge of the first fire cover jointly define an auxiliary fire hole located on the side of the second fire cover. The size of the main fire hole, the size of the auxiliary fire hole and the distance between the main fire hole and the ejection outlet and the distance between the auxiliary fire hole and the ejection outlet can be adjusted. The distance between the first side plate and the second side plate is adjusted, so that the area and the height of the fire hole are adjustable, the area of an injection inlet is adjusted through the wind shield, the burner can adapt to combustion of hydrogen-doped natural gas with different hydrogen contents, the backfire risk is reduced, and the heat efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heater burners, and specifically to a natural gas water heater burner that can adapt to hydrogen mixing. The statements in this section merely provide background technology related to the utility model and do not necessarily constitute prior art. Background Art

[0002] The statements in this section merely provide background technology related to the present invention and do not necessarily constitute prior art.

[0003] Compared with natural gas, hydrogen-blended natural gas requires less theoretical air for combustion, burns faster, and is more prone to flashback for atmospheric burners. In natural gas hydrogen-blended projects, hydrogen energy needs to be used safely and effectively. However, existing traditional atmospheric water heater burners cannot adjust the flame hole and the ejector inlet area to reduce the risk of flashback, and the thermal efficiency decreases when the flame height decreases. Utility Model Content

[0004] The utility model aims to provide a burner for a hydrogen-adapted natural gas water heater which reduces the risk of flashback while ensuring thermal efficiency, so as to solve at least one technical problem existing in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a burner for a water heater that can adapt to hydrogen-blended natural gas, including an ejector;

[0007] A first side plate is detachably connected to one side of the ejection outlet of the ejector, and a first fire cover is connected to the first side plate; a second side plate opposite to the first side plate is detachably connected to the other side of the ejection outlet, and a second fire cover is connected to the second side plate;

[0008] The first fire cover is provided with a plurality of first openings and a plurality of second openings; the second fire cover is provided with a plurality of third openings and a plurality of fourth openings;

[0009] The first opening is connected to the third opening to form a main fire hole opposite to the injection outlet; the second opening and the edge of the second fire cover together form a secondary fire hole located on the side of the first fire cover; the fourth opening and the edge of the first fire cover together form a secondary fire hole located on the side of the second fire cover;

[0010] in,

[0011] The size of the main fire hole, the size of the auxiliary fire hole, and the distances between the main fire hole, the auxiliary fire hole and the injection outlet all change with the change of the distance between the first side plate and the second side plate.

[0012] Furthermore, the second fire cover is provided with a plurality of recessed portions, at least one of the third openings is provided in one of the recessed portions; and at least one of the fourth openings is provided between two adjacent recessed portions.

[0013] Furthermore, the first fire cover is provided with a plurality of insertion parts, each of which corresponds to a recessed part, and the insertion part can be inserted into the corresponding recessed part; at least one first opening is provided on the insertion part; and at least two of the second openings are provided between two adjacent insertion parts.

[0014] Furthermore, the first spacing portion between two adjacent second openings is opposite to one of the fourth openings, and the first spacing portion can be inserted into the fourth opening.

[0015] Furthermore, both ends of the first side plate are provided with first end plates connected to the first fire cover, and both ends of the second side plate are provided with second end plates connected to the second fire cover; a clamping plate is provided on one side of the first end plate, and a clamping groove is formed between the clamping plate and the first end plate for the second end plate to be clamped into.

[0016] Furthermore, a plurality of slots are symmetrically provided on both sides of the ejection outlet, and the distances between the plurality of slots and the ejector increase from the outside to the inside; the first side panel and the second side panel are respectively inserted into two slots with equal distances between the two sides of the ejection outlet and the ejector.

[0017] Furthermore, a third end plate is provided at both ends of the ejection outlet, and a plug-in channel for the first end plate and the second end plate to pass through is provided between the third end plate and the slot.

[0018] Furthermore, wind shields are movably provided at both ends of the ejection inlet of the ejector, and the distance between the two wind shields is adjustable.

[0019] Furthermore, ear plates are provided at both ends of the injection inlet, and the ear plates are connected to clamping plates via connecting columns, and the wind shield plate can be movably inserted between the clamping plates and the ear plates.

[0020] Furthermore, the windshield is provided with a longitudinal groove for the connecting column to pass through, and one side of the longitudinal groove is provided with a plurality of transverse grooves for the connecting column to be inserted into.

[0021] The beneficial effects of the utility model are as follows: by adjusting the distance between the first side plate and the second side plate, the fire hole area and the fire hole height can be adjusted, and the injection inlet area can be adjusted through the wind shield plate, which can adapt to the combustion of hydrogen-blended natural gas with different hydrogen contents, reduce the risk of flashback, and improve thermal efficiency.

[0022] Additional aspects and advantages of the present invention will be partially given in the following description, which will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments 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 these drawings without creative work.

[0024] Figure 1 This is a three-dimensional structural diagram of the first mode of a burner for a hydrogen-blended natural gas water heater according to an embodiment of the utility model.

[0025] Figure 2 This is a three-dimensional structural diagram of the ejector adaptable to the hydrogen-blended natural gas water heater burner described in an embodiment of the utility model.

[0026] Figure 3 for Figure 2 Longitudinal cross-sectional structure diagram along the AA direction.

[0027] Figure 4 This is a transverse sectional structural diagram of the head channel of the ejector described in an embodiment of the utility model.

[0028] Figure 5 This is a front structural diagram of the first fire cover described in an embodiment of the utility model.

[0029] Figure 6 This is a rear structural diagram of the second fire cover described in an embodiment of the utility model.

[0030] Figure 7 This is a front structural diagram of the windshield described in an embodiment of the utility model.

[0031] Figure 8 This is a three-dimensional structural diagram of the second mode of the hydrogen-blended natural gas water heater burner described in an embodiment of the utility model.

[0032] Fig. 9 It is a three-dimensional structural diagram of the third mode of the hydrogen-blended natural gas water heater burner described in the embodiment of the utility model.

[0033] Among them: 1- ejector; 2- ejection outlet; 3- first side plate; 4- first fire cover; 5- second side plate; 6- second fire cover; 7- first opening; 8- second opening; 9- third opening; 10- fourth opening; 11- main fire hole; 12- secondary fire hole; 13- recessed portion; 14- inserted portion; 15- first partition portion; 16- first end plate; 17- second end plate; 18- clamping plate; 19- clamping slot; 20- slot; 21- third end plate; 22- plug-in channel; 23- ejection inlet; 24- wind shield; 25- ear plate; 26- connecting column; 27- clamping plate; 28- longitudinal groove; 29- transverse groove; 30- gas mixing channel; 31- side wall; 32- arc plate; 33- throat; 34- head channel; 35- second partition portion. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below by the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0035] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which the present invention belongs.

[0036] It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have a meaning consistent with that in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless as defined herein.

[0037] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or groups thereof.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0039] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying 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 the description of this utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the description of this specification, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present technology and simplifying the description, and do not indicate or imply that the referred device or element 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 technology.

[0041] Unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in this technology can be understood according to specific circumstances.

[0042] To facilitate the understanding of the present invention, the present invention is further explained below with reference to specific embodiments in conjunction with the accompanying drawings, and the specific embodiments do not constitute a limitation on the embodiments of the present invention.

[0043] Those skilled in the art should understand that the drawings are merely schematic diagrams of embodiments, and the components in the drawings are not necessarily necessary for implementing the present invention.

[0044] like Figures 1 to 9As shown, the embodiment of the utility model provides a burner for a water heater that can adapt to hydrogen-blended natural gas, including an ejector 1, wherein the ejector 1 includes an ejector inlet 23, a throat 33, a gas mixing channel 30 and a head channel 34, and the top of the head channel 34 is an ejector outlet 2. The ejector inlet 23 includes two side walls 31 connected to the throat 33 and an arc-shaped plate 32 connected to the side walls 31. The hydrogen-blended natural gas and the ejected air enter the throat 33 and the gas mixing channel 30 from the ejector inlet 23 to reduce the speed and mix, and then come out from the ejector outlet through the head channel 34 to reach the fire hole for combustion.

[0045] In this embodiment, the burner of the water heater adaptable to hydrogen-mixed natural gas can adjust the fire hole area, the injection inlet area and the fire hole height to achieve different modes, and different modes are adapted to hydrogen-mixed natural gas with different hydrogen mixing ratios. For example, when in the first mode, the total area of ​​the fire holes and the cross-sectional area of ​​the injection inlet are the largest, and the height of the fire holes is the lowest, which is adapted to hydrogen-mixed natural gas with a low hydrogen mixing ratio; when in the second mode, the total area of ​​the fire holes and the cross-sectional area of ​​the injection inlet are reduced compared with the first mode, and the height of the fire holes is increased compared with the first mode, which is adapted to hydrogen-mixed natural gas with a higher hydrogen mixing ratio than the first mode; when in the third mode, the total area of ​​the fire holes and the cross-sectional area of ​​the injection inlet are smaller than those in the second mode, and the height of the fire holes is higher than that in the second mode, which is adapted to hydrogen-mixed natural gas with a higher hydrogen mixing ratio than the second mode, and so on.

[0046] Specifically, in this embodiment, the fire hole includes a main fire hole 11 and a secondary fire hole 12. Figure 1 , Figure 5 , Figure 6 As shown, its formation method is as follows: a first side plate 3 is detachably connected to one side of the ejection outlet 2 of the ejector 1, and the first side plate 3 is connected to a first fire cover 4. A second side plate 5 opposite to the first side plate 3 is detachably connected to the other side of the ejection outlet 2, and the second side plate 5 is connected to a second fire cover 6. The first fire cover 4 is provided with a plurality of first openings 7 and a plurality of second openings 8; the second fire cover 6 is provided with a plurality of third openings 9 and a plurality of fourth openings 10. The first opening 7 is communicated with the third opening 9 to form a main fire hole 11 opposite to the ejection outlet. The second opening 8 and the edge of the second fire cover 6 together form a secondary fire hole 12 located on the side of the first fire cover 4; the fourth opening 10 and the edge of the first fire cover 4 together form a secondary fire hole 12 located on the side of the second fire cover 6.

[0047] The size of the main fire hole 11, the size of the auxiliary fire hole 12, and the distances between the main fire hole 11, the auxiliary fire hole 12 and the injection outlet 2 all change with the change of the distance between the first side plate 3 and the second side plate 5. Specifically, the area of ​​the fire hole is adjusted by adjusting the distance between the first side plate 3 and the second side plate 5; at the same time, the distance between the first fire cover 4 and the second fire cover 6 and the injection outlet 2 is adjusted by adjusting the distance between the first side plate 3 and the second side plate 5, thereby adjusting the height of the main fire hole 11 and the auxiliary fire hole 12.

[0048] Combination Figure 5 , Figure 6 As shown, in order to adjust the fire hole area by adjusting the distance between the first side plate 3 and the second side plate 5, a plurality of recessed portions 13 are provided on the second fire cover 6, and a plurality of insertion portions 14 are provided on the first fire cover 4, each of the insertion portions 14 corresponds to one of the recessed portions 13, and when the first side plate 3 and the second side plate 5 are close to each other, the insertion portion 14 can be inserted into the corresponding recessed portion 13; at least one of the third openings 9 is provided in one of the recessed portions 13; at least one of the fourth openings 10 is provided between two adjacent recessed portions 13; at least one of the first openings 7 is provided on the insertion portion 14; and at least two of the second openings 8 are provided between two adjacent insertion portions 14.

[0049] like Figure 5 As shown, Figure 1 The main structural diagram of the first fire cover 4 in the viewing direction. In this embodiment, the first fire cover 4 is provided with 7 insertion parts 14, each insertion part 14 is provided with two first openings 7, and 5 second openings 8 are provided between two adjacent insertion parts 14, and a first spacing part 15 is provided between two adjacent second openings 8. Correspondingly, as Figure 6 As shown, Figure 1The rear view structure diagram of the second fire cover 6 in the viewing direction. There are a total of 7 recessed portions 13 on the second fire cover 6, and each recessed portion 13 is provided with two third openings 9, and four fourth openings 10 are provided between two adjacent recessed portions 13, and a second spacer 35 is provided between two adjacent fourth openings 10. When the distance between the first side plate 3 and the second side plate 5 is reduced, the insertion portion 14 can be inserted into the recessed portion 13, and the first opening 7 on the insertion portion 14 is opposite to the third opening 9 in the recessed portion 13, and the two are always in a connected state; the side walls on both sides of the recessed portion 13 and the second spacer 35 between two adjacent fourth openings 10 are respectively inserted into one second opening 8, then the secondary fire hole 12 on one side of the first fire cover 4 is formed between the second opening 8 and the edge of the second spacer 35, and between the second opening 8 and the edge of the side walls on both sides of the recessed portion 13, and the first spacer 35 between two adjacent second openings 8 is provided. The spacer 15 is inserted into a fourth opening 10, and a secondary fire hole 12 on one side of the second fire cover 6 is formed between the edge of the first spacer 15 and the fourth opening 10. By changing the distance between the first side plate 3 and the second side plate 5, the degree of insertion of the first spacer 15 into the fourth opening 10 and the degree of insertion of the second spacer 35 into the second opening 8 are changed, thereby changing the area of ​​the secondary fire hole 12. Since the first opening 7 and the third opening 9 are relatively positioned, the area of ​​the main fire hole 11 formed by the first opening 7 and the third opening 9 can be directly achieved by changing the distance between the first side plate 3 and the second side plate 5.

[0050] In a specific application, the number of the insertion parts 14 on the first fire cover 4 is not limited to the above-mentioned 7. The number of the corresponding recessed parts 13 on the second fire cover 6 corresponds to the number of the insertion parts 14. Those skilled in the art can set the number of the insertion parts 14 and the recessed parts 13 according to the specific situation. At the same time, the number of the first openings 7 on each insertion part 14 is not limited to the above-mentioned number. The number of the third openings 9 in each recessed part 13 corresponds to the number of the first openings 7. Those skilled in the art can set the number of the third openings 9 in each recessed part 13 and the number of the first openings on each insertion part 14 to 7 according to the specific situation. Similarly, the number of the second openings 8 between two adjacent insertion parts 14 is not limited to the above-mentioned number. Those skilled in the art can set it according to the specific situation, but it is at least two. Correspondingly, the number of the fourth openings 10 between two adjacent recessed parts 13 is one less than the number of the second openings 8 between two adjacent insertion parts 14.

[0051] In this embodiment, in order to ensure that the first fire cover 4 and the second fire cover 6 are plugged in more stably and reliably, and to ensure the sealing of the space between the ejection outlet 2 and the fire hole, first end plates 16 connected to the first fire cover 4 are provided at both ends of the first side plate 3, and second end plates 17 connected to the second fire cover 6 are provided at both ends of the second side plate 5; a clamping plate 18 is provided on one side of the first end plate 16, and a clamping groove 19 for the second end plate 17 to be clamped in is formed between the clamping plate 18 and the first end plate 16. When the first side plate 3 and the second side plate 5 are close to each other, as shown in FIG. Figure 6 The second end plate 17 at the left end of the second fire cover 6 shown is inserted into the Figure 5 In the slot 19 at the right end of the first fire cover 4 shown, Figure 6 The second end plate 17 at the right end of the second fire cover 6 shown is inserted into Figure 5 The first fire cover 4 is shown in the card slot 19 at the left end. Correspondingly, both ends of the injection outlet 2 are provided with a third end plate 21, and a plug-in channel 22 for the first end plate 16 and the second end plate 17 to pass through is provided between the third end plate 21 and the slot 20.

[0052] In the present embodiment, in order to adjust the distance between the first fire cover 4 and the second fire cover 6 and the ejection outlet 2 by adjusting the distance between the first side panel 3 and the second side panel 5, thereby adjusting the height of the main fire hole 11 and the auxiliary fire hole 12, a plurality of slots 20 are symmetrically provided on both sides of the ejection outlet 2, and the distance between the plurality of slots 20 and the ejector 1 increases from the outside to the inside; the first side panel 3 and the second side panel 5 are respectively inserted into two slots 20 with equal distances between the ejection outlet 2 and the ejector 1 on both sides.

[0053] Specific, combined Figure 1 , Figure 2 , Figure 7 , Figure 8 As shown, in this embodiment, three slots 20 are provided on both sides of the ejection outlet 2, and the rightmost slot 20 on the right side of the ejection outlet 2 and the leftmost slot 20 on the left side of the ejection outlet 2 are at the same distance from the central axis of the ejection outlet 2, and the height (i.e., the distance from the ejector 1) is the lowest. Similarly, the middle slots 20 on both sides of the ejection outlet 2 are also at the same distance from the central axis of the ejection outlet 2, and the distance between the two is closer than the distance between the two outermost slots 20. Similarly, the leftmost slot 20 on the right side of the ejection outlet 2 and the rightmost slot 20 on the left side of the ejection outlet 2 are at the same distance from the central axis of the ejection outlet 2, and the height (i.e., the distance from the ejector 1) is the highest, and the distance between the two is closer than the distance between the two middle slots 20.

[0054] In this embodiment, combined with Figure 1 , Figure 7, Figure 8 , Fig. 9 As shown, in order to realize the cross-sectional area of ​​the ejection inlet 23, windshield plates 24 are movably provided at both ends of the ejection inlet 23 of the ejector, and the size of the ejection inlet 23 is adjusted by adjusting the distance between the two windshield plates 24. Specifically, in order to realize the adjustment of the distance between the windshield plates 24, ear plates 25 are provided at both ends of the ejection inlet 23, and the ear plates 25 are connected to clamping plates 27 through connecting columns 26, and the windshield plates 24 are movably inserted between the clamping plates 27 and the ear plates 25. A longitudinal groove 28 for the connecting column 26 to pass through is provided on the windshield plate 24, and a plurality of transverse grooves 29 for the connecting column 26 to be inserted into are provided on one side of the longitudinal groove 28. Among them, as Fig. 9 As shown, when the two connecting posts 26 at the upper end of the injection inlet 23 are inserted into Figure 7 When the uppermost transverse groove 29 of the windshield described in the drawing is inserted into the uppermost transverse groove 29, the two lower ends of the introduction inlet 23 are also inserted into the transverse groove 29 at the same position. At this time, the distance between the upper and lower windshields 24 is the smallest. At this time, the entrance of the introduction inlet 23 is the smallest; Figure 8 As shown, when the two connecting posts 26 at the upper end of the injection inlet 23 are inserted into Figure 7 When the windshield 24 is inserted into the middle transverse groove 29, the two connecting columns 26 at the lower end of the injection inlet 23 are also inserted into the two middle transverse grooves 29, and the distance between the upper and lower windshields 24 is relatively large. Fig. 9 The distance in the middle becomes smaller. At this time, the entrance size of the injection entrance 23 is smaller than that of the Fig. 9 The in also becomes smaller; Figure 1 As shown, when the two connecting posts 26 at the upper end of the injection inlet 23 are inserted into Figure 7 When the two lowermost transverse grooves 29 of the windshield 24 are inserted into the two transverse grooves 29, the two connecting posts 26 at the lower end of the injection inlet 23 are also inserted into the two transverse grooves 29 at the same position, and the distance between the upper and lower windshields 24 is relatively large. Figure 8 The distance in the middle becomes smaller. At this time, the entrance size of the injection entrance 23 is smaller than that of the Figure 8 The one in it also gets smaller.

[0055] In this embodiment, for example, when the first side plate 3 and the second side plate 5 are simultaneously inserted into the outermost slot 20, a first combination is realized. In the first combination, the areas of the main fire hole 11 and the auxiliary fire hole 12 are the largest. At the same time, the connecting column 25 is stuck in the outermost transverse groove 28 on the wind shield 24, the area of ​​the introduction inlet 23 is the largest, and the heights of the main fire hole 11 and the auxiliary fire hole 12 are the lowest, which can adapt to hydrogen-blended natural gas with a low hydrogen content. When the first side plate 3 and the second side plate 5 are simultaneously inserted into the middle slot 20, a second combination is realized. In the second combination, the areas of the main fire hole 11 and the auxiliary fire hole 12 are reduced. At the same time, the connecting column 25 is stuck in the middle transverse groove 28 on the wind shield 24, the area of ​​the introduction inlet 23 is reduced, and the heights of the main fire hole 11 and the auxiliary fire hole 12 are increased, which can adapt to hydrogen-blended natural gas with a moderate hydrogen content. When the first side plate 3 and the second side plate 5 are simultaneously inserted into the innermost slot 20, a third combination is realized. In the third combination, the area of ​​the main fire hole 11 and the auxiliary fire hole 12 is the smallest. At the same time, the connecting column 25 is stuck in the innermost transverse groove 28 on the wind shield 24, the area of ​​the injection inlet 23 is the smallest, and the height of the main fire hole 11 and the auxiliary fire hole 12 is the highest, which can adapt to hydrogen-blended natural gas with a high hydrogen content. Among them, the hydrogen blending range is determined by the specific parameters of the injector 1 and the main fire hole 11 and the auxiliary fire hole 12, and the height of the main fire hole 11 and the auxiliary fire hole 12 is determined by the hydrogen blending ratio range.

[0056] In actual applications, the number of slots 20 on both sides of the injection outlet 2 is not limited to the above three. Those skilled in the art can set the number of slots 20 according to the actual hydrogen doping ratio and usage requirements. The number of corresponding transverse grooves 28 is consistent with the number of slots 20 on each side of the injection outlet 2.

[0057] In summary, the burner adaptable to hydrogen-blended natural gas water heater described in the embodiment of the utility model is provided with three slots 20 on both sides of the injection outlet 2. When the first side plate 3 and the second side plate 5 are inserted into two different slots 20 at the same time, the area and height of the main fire hole 11 and the area and height of the auxiliary fire hole 12 can be adjusted. In combination with the adjustment of the area of ​​the injection inlet, the use of hydrogen-blended natural gas with different hydrogen contents can be realized.

[0058] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution disclosed in the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work should be included in the scope of protection of the utility model.

Claims

1. A burner for a water heater adaptable to hydrogen-blended natural gas, comprising an ejector (1), characterized in that: A first side plate (3) is detachably connected to one side of the ejection outlet (2) of the ejector (1), and the first side plate (3) is connected to a first fire cover (4); a second side plate (5) opposite to the first side plate (3) is detachably connected to the other side of the ejection outlet (2), and the second side plate (5) is connected to a second fire cover (6); The first fire cover (4) is provided with a plurality of first openings (7) and a plurality of second openings (8); the second fire cover (6) is provided with a plurality of third openings (9) and a plurality of fourth openings (10); The first opening (7) is in communication with the third opening (9) to form a main fire hole (11) opposite to the injection outlet; the second opening (8) and the edge of the second fire cover (6) together form a secondary fire hole (12) located on the side of the first fire cover (4); the fourth opening (10) and the edge of the first fire cover (4) together form a secondary fire hole (12) located on the side of the second fire cover (6); in, The size of the main fire hole (11), the size of the auxiliary fire hole (12), and the distances between the main fire hole (11), the auxiliary fire hole (12) and the injection outlet (2) all change with the change of the distance between the first side plate (3) and the second side plate (5).

2. The burner for water heater adaptable to hydrogen-blended natural gas according to claim 1 is characterized in that: The second fire cover (6) is provided with a plurality of recessed portions (13), at least one of the third openings (9) is provided in one of the recessed portions (13), and at least one of the fourth openings (10) is provided between two adjacent recessed portions (13).

3. The burner for water heater adaptable to hydrogen-blended natural gas according to claim 2 is characterized in that: The first fire cover (4) is provided with a plurality of insertion portions (14), each of the insertion portions (14) corresponds to a recessed portion (13), and the insertion portion (14) can be inserted into the corresponding recessed portion (13); at least one of the first openings (7) is provided on the insertion portion (14); and at least two of the second openings (8) are provided between two adjacent insertion portions (14).

4. The burner for water heater adaptable to hydrogen-blended natural gas according to claim 3 is characterized in that: A first spacing portion (15) between two adjacent second openings (8) is opposite to one of the fourth openings (10), and the first spacing portion (15) can be inserted into the fourth opening (10).

5. The burner for water heater adaptable to hydrogen-blended natural gas according to claim 4 is characterized in that: Both ends of the first side plate (3) are provided with first end plates (16) connected to the first fire cover (4), and both ends of the second side plate (5) are provided with second end plates (17) connected to the second fire cover (6); a clamping plate (18) is provided on one side of the first end plate (16), and a clamping groove (19) for the second end plate (17) to be clamped into is formed between the clamping plate (18) and the first end plate (16).

6. The burner for water heater adaptable to hydrogen-blended natural gas according to claim 5 is characterized in that: A plurality of slots (20) are symmetrically arranged on both sides of the ejection outlet (2), and the distances between the plurality of slots (20) and the ejector (1) increase from the outside to the inside; the first side plate (3) and the second side plate (5) are respectively inserted into two slots (20) on both sides of the ejection outlet (2) and the ejector (1) at equal distances.

7. The burner for water heater adaptable to hydrogen-blended natural gas according to claim 6 is characterized in that: A third end plate (21) is provided at both ends of the ejection outlet (2), and a plug-in channel (22) for the first end plate (16) and the second end plate (17) to pass through is provided between the third end plate (21) and the slot (20).

8. The burner for water heater adaptable to hydrogen-blended natural gas according to claim 6 is characterized in that: Wind shields (24) are movably provided at both ends of the ejector inlet (23), and the distance between the two wind shields (24) is adjustable.

9. The burner for water heater adaptable to hydrogen-blended natural gas according to claim 8, characterized in that: Ear plates (25) are provided at both ends of the injection inlet (23); the ear plates (25) are connected to clamping plates (27) via connecting columns (26); and the wind shield plate (24) is movably inserted between the clamping plate (27) and the ear plates (25).

10. The burner for water heater adaptable to hydrogen-blended natural gas according to claim 9, characterized in that: The windshield plate (24) is provided with a longitudinal groove (28) for the connecting column (26) to pass through, and one side of the longitudinal groove (28) is provided with a plurality of transverse grooves (29) for the connecting column (26) to be inserted into.

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