Multi-section gas distribution rod assembly and combustor

Abstract

The utility model discloses a multi-section gas distribution rod assembly and a combustor. The multi-section air distribution rod assembly comprises an air distribution rod, an air inlet channel, a first switch valve and a second switch valve. A plurality of nozzle sets are arranged on the surface of the gas distribution rod in the length direction of the gas distribution rod, and each nozzle set comprises a thick nozzle and a thin nozzle. A first cavity, a second cavity, a third cavity and a connecting cavity are formed in the air distribution rod, the air inlet channel communicates with the first cavity and the connecting cavity, and the first switch valve controls the connecting cavity to communicate with the second cavity or controls the connecting cavity to be separated from the second cavity. The second switch valve controls the connection cavity to be communicated with the third cavity or controls the connection cavity to be separated from the third cavity; the nozzle sets comprise the first nozzle set communicating with the first cavity, the second nozzle set communicating with the second cavity and the third nozzle set communicating with the third cavity. According to the utility model, four-section thermal load control can be carried out on the rich-lean burner, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a multi-segmented gas distribution rod assembly and a burner. Background Art

[0002] For existing fire grate burners, gas distribution rods are generally used to control the heat load of fire grate combustion, so that the heat load meets the use needs, and can also avoid unnecessary heat loss and reduce gas waste. For example, the Chinese utility model patent with publication number CN215002285U discloses a four-segment gas distribution rod for a wall-mounted boiler. As described in the patent document, the current gas distribution rod is mainly suitable for ordinary burners, and there is no gas distribution rod assembly for thick and thin burners. Utility Model Content

[0003] The utility model provides a multi-segment gas distribution rod assembly and a burner, which can perform four-segment heat load control on a thick and thin burner, thereby improving the user experience.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] According to the first aspect of the utility model, an embodiment of the utility model provides a multi-segmented gas splitter rod assembly, comprising a gas splitter rod, an air intake passage, a first switch valve and a second switch valve; the surface of the gas splitter rod is arranged with a plurality of nozzle groups along the length direction of the gas splitter rod, and each nozzle group comprises a thick nozzle and a thin nozzle; a first cavity, a second cavity, a third cavity and a connecting cavity are arranged in the gas splitter rod, and the air intake passage is connected with the first cavity and the connecting cavity, the first switch valve is used to control the connection between the connecting cavity and the second cavity or the isolation between the connecting cavity and the second cavity, and the second switch valve is used to control the connection between the connecting cavity and the third cavity or the isolation between the connecting cavity and the third cavity; the nozzle group comprises a plurality of first nozzle groups connected with the first cavity, a plurality of second nozzle groups connected with the second cavity and a plurality of third nozzle groups connected with the third cavity, and the number of the third nozzle groups is greater than the number of the second nozzle groups.

[0006] In some embodiments, the thick nozzles and the thin nozzles included in each nozzle group are distributed in the up-down direction, all the thick nozzles are arranged in a row along the length direction of the gas splitter rod, and all the thin nozzles are also arranged in a row along the length direction of the gas splitter rod.

[0007] In some embodiments, the third cavity, the first cavity and the second cavity are arranged along the length direction of the gas dividing rod.

[0008] In some embodiments, the first cavity partially overlaps with an extended path of the air inlet channel, and an inner wall of the first cavity is provided with a first opening connecting the air inlet channel and the first cavity, and the first opening is located on the extended path of the air inlet channel.

[0009] In some embodiments, the side wall of the second cavity is provided with a second opening connected to the connecting cavity, and the side wall of the third cavity is provided with a third opening connected to the connecting cavity; the first switch valve and the second switch valve both include a movable valve core, when the valve core of the first switch valve blocks the second opening, the connecting cavity is connected to the second cavity, when the valve core of the first switch valve is separated from the second opening, the connecting cavity is separated from the second cavity; when the valve core of the second switch valve blocks the third opening, the connecting cavity is connected to the third cavity, when the valve core of the second switch valve is separated from the third opening, the connecting cavity is separated from the third cavity.

[0010] In some embodiments, the first nozzle group and the second nozzle group are each provided with two nozzles, and the third nozzle group is provided with five nozzles.

[0011] According to the second aspect of the utility model, an embodiment of the utility model provides a burner, comprising a plurality of fire bar single pieces and a multi-segmented gas distribution rod assembly as described in any one of the first aspects above, wherein the fire bar single pieces are arranged along the length direction of the gas distribution rod, and each fire bar single piece is connected to a nozzle group.

[0012] The utility model has at least the following beneficial effects: the utility model is provided with a plurality of nozzle groups on the gas distribution rod, each nozzle group includes a rich nozzle and a lean nozzle to adapt to the rich and lean burner; since the first cavity is connected with a plurality of first nozzle groups, the second cavity is connected with a plurality of second nozzle groups, and the third cavity is connected with a plurality of third nozzle groups; when the first switch valve and the second switch valve are both closed, only the first nozzle group draws gas to make the burner work at the first gear; when the first switch valve is opened and the second switch valve is closed, the first nozzle group and the second nozzle group draw gas to make the burner work at the second gear; when the first switch valve is closed and the second switch valve is opened, the first nozzle group and the third nozzle group draw gas to make the burner work at the third gear, since the number of the third nozzle group is greater than the number of the second nozzle group, the heat load of the third gear is greater than the heat load of the second gear; when the first switch valve and the second switch valve are both opened, the first nozzle group, the second nozzle group and the third nozzle group all draw gas, and the burner works at the fourth gear of the maximum heat load; thereby realizing four-segment heat load control and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of an air distribution rod assembly according to an embodiment of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of a gas distribution rod assembly according to an embodiment of the utility model;

[0015] Figure 3It is a cross-sectional schematic diagram of an air distribution rod assembly according to an embodiment of the utility model after removing the first switch valve and the second switch valve.

[0016] Wherein, the accompanying drawings are marked as follows:

[0017] The gas distribution rod 100, the first cavity 110, the first opening 111, the second cavity 120, the second opening 121, the third cavity 130, the third opening 131, and the connecting cavity 140;

[0018] Intake passage 200,

[0019] A first switch valve 310, a second switch valve 320;

[0020] The thick nozzle 401 , the thin nozzle 402 , the first nozzle group 410 , the second nozzle group 420 , and the third nozzle group 430 . DETAILED DESCRIPTION

[0021] The utility model provides the following description with reference to the accompanying drawings to help fully understand the various embodiments of the utility model as defined by the claims and their equivalents. The description includes various specific details to help understanding, but these details should be regarded as exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the utility model.

[0022] In the description of the present invention, descriptions of orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They 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 invention.

[0023] It will be understood that when one element (eg, a first element) is “connected” to another element (eg, a second element), the element may be directly connected to the other element or an intervening element (eg, a third element) may be present between the element and the other element.

[0024] The embodiment of the utility model provides a multi-segmented gas rod assembly, such as Figure 1-3As shown, it includes a gas distribution rod 100, an air inlet channel 200, a first switch valve 310 and a second switch valve 320. The surface of the gas distribution rod 100 is arranged with a plurality of nozzle groups along the length direction of the gas distribution rod 100, and each nozzle group includes a rich nozzle 401 and a lean nozzle 402. The rich nozzle 401 can control the burner to produce rich combustion, and the lean nozzle 402 can control the burner to produce lean combustion. Since the fire row monolithic pieces are usually arranged neatly, the arrangement of the nozzle groups along the length direction of the gas distribution rod 100 can adapt to the arrangement of the fire row monolithic pieces. The nozzle group includes a plurality of first nozzle groups 410, a plurality of second nozzle groups 420 and a plurality of third nozzle groups 430, and each of the first nozzle group 410, the second nozzle group 420 and the third nozzle group 430 includes a rich nozzle 401 and a lean nozzle 402.

[0025] The gas distribution rod 100 is provided with a first cavity 110, a second cavity 120, a third cavity 130 and a connecting cavity 140, and the first cavity 110, the second cavity 120 and the third cavity 130 are independent of each other. The air inlet channel 200 is connected with the first cavity 110, and the air inlet channel 200 is also connected with the connecting cavity 140, and the gas is input from the air inlet channel 200 and then flows to the first cavity 110 and the connecting cavity 140. The first switch valve 310 and the second switch valve 320 can be fixed on the gas distribution rod 100, and the first switch valve 310 is used to control the connection between the connecting cavity 140 and the second cavity 120 or the connection between the connecting cavity 140 and the second cavity 120. When the connecting cavity 140 is connected with the second cavity 120, the gas in the connecting cavity 140 can flow to the second cavity 120, and when the connecting cavity 140 is isolated from the second cavity 120, there is no gas supply to the second cavity 120. The second switch valve 320 is used to control the connection between the connecting cavity 140 and the third cavity 130 or to isolate the connecting cavity 140 from the third cavity 130; when the connecting cavity 140 and the third cavity 130 are connected, the gas in the connecting cavity 140 flows to the third cavity 130, and when the connecting cavity 140 and the third cavity 130 are isolated, there is no gas supply to the third cavity 130. The first cavity 110 is connected to the first nozzle group 410, the second cavity 120 is connected to the second nozzle group 420, and the third cavity 130 is connected to the third nozzle group 430, and the number of the third nozzle group 430 is greater than the number of the second nozzle group 420.

[0026] The nozzle group of this embodiment includes a rich nozzle 401 and a lean nozzle 402 to form rich-lean combustion to adapt to the rich-lean burner. When the first switch valve 310 and the second switch valve 320 are both closed, only the first nozzle group 410 draws gas, so that the burner works at the first gear; when the first switch valve 310 is opened and the second switch valve 320 is closed, the first nozzle group 410 and the second nozzle group 420 both draw gas, so that the burner works at the second gear, and the heat load of the second gear is greater than the heat load of the first gear; when the first switch valve 310 is closed and the second switch valve 320 is opened, the first nozzle group 410 and the third nozzle group 430 draw gas, so that the burner works at the third gear, because the number of the third nozzle group 430 is greater than the number of the second nozzle group 420, the heat load of the third gear is greater than the heat load of the second gear; when the first switch valve 310 and the second switch valve 320 are both opened, the first nozzle group 410, the second nozzle group 420 and the third nozzle group 430 all draw gas, and the burner works at the fourth gear with the maximum heat load. Therefore, this embodiment can realize four-segment heat load control, which improves the user experience.

[0027] In some embodiments, the air intake passage 200 may be enclosed by an air intake pipe, which is connected to the air dividing rod 100 , or the inner space of the air dividing rod 100 may be enclosed to form the air intake passage 200 .

[0028] In some embodiments, the thick nozzles 401 and the thin nozzles 402 included in each nozzle group are distributed in the up-down direction, and all the thick nozzles 401 are arranged in a row along the length direction of the gas distribution rod 100, and all the thin nozzles 402 are also arranged in a row along the length direction of the gas distribution rod 100, so as to form a two-row nozzle structure. The relative positions of the thick nozzles 401 and the thin nozzles 402 are kept uniform, and each single piece of the fire row can adopt the same structure to reduce the manufacturing difficulty and facilitate the overall assembly.

[0029] In some embodiments, the third cavity 430, the first cavity 410 and the second cavity 420 are arranged along the length direction of the gas dividing rod 100, which is the same as the arrangement direction of the nozzle group, so as to adapt to the distribution of the first nozzle group 410, the second nozzle group 420 and the third nozzle group 430, shorten the connection path between the nozzle group and the corresponding cavity, simplify the pipeline setting, and make the entire structure more compact.

[0030] Furthermore, the arrangement direction of the third nozzle group 430, the first nozzle group 410 and the second nozzle group 420 is the same as the arrangement direction of the third cavity 430, the first cavity 410 and the second cavity 420 to further adapt to each other and shorten the connection path between the nozzle group and the corresponding cavity.

[0031] In some embodiments, the first cavity 110 partially overlaps with the extended path of the air inlet channel 200, and the inner wall of the first cavity 110 is provided with a first opening 111 connecting the air inlet channel 200 and the first cavity 110, and the first opening 111 is located on the extended path of the air inlet channel 200. Since the first cavity 110 partially overlaps with the extended path of the air inlet channel 200, the positional relationship between the first cavity 110 and the air inlet channel 200 is relatively more compact, which can improve the compactness of the entire gas distribution rod assembly. At the same time, the first opening 111 is located on the extended path of the air inlet channel 200, and the gas in the air inlet channel 200 can easily enter the first cavity 110 directly.

[0032] In some embodiments, the side wall of the second cavity 120 is provided with a second opening 121 communicating with the connecting cavity 140, and the side wall of the third cavity 130 is provided with a third opening 131 communicating with the connecting cavity 140. The first switch valve 310 and the second switch valve 320 both include a movable valve core. When the valve core of the first switch valve 310 blocks the second opening 121, the connecting cavity 140 is communicated with the second cavity 120. When the valve core of the first switch valve 310 is separated from the second opening 121, the connecting cavity 140 is separated from the second cavity 120. When the valve core of the second switch valve 320 blocks the third opening 131, the connecting cavity 140 is communicated with the third cavity 130. When the valve core of the second switch valve 320 is separated from the third opening 131, the connecting cavity 140 is separated from the third cavity 130. Thus, the connecting cavity 140 is connected to the second cavity 120 or is isolated from the second cavity 120 and the connecting cavity 140 is connected to the third cavity 130 or is isolated from the third cavity 130. The first switch valve 310 and the second switch valve 320 can both be solenoid valves.

[0033] In some embodiments, the first nozzle group 410 and the second nozzle group 420 are each provided with two, and the third nozzle group 430 is provided with five, thereby forming a 2-4-7-9 segmentation, and the overlapping area of ​​the heat load is relatively large. When the gas distribution rod assembly of this embodiment is used in a water heater, the water temperature fluctuation when switching segments can be reduced, and the water temperature can be prevented from being too low or too high, thereby meeting the user's various water needs.

[0034] The embodiment of the utility model further provides a burner, comprising a plurality of fire row pieces and a multi-segmented gas distribution rod assembly of any of the above embodiments. The specific description of the multi-segmented gas distribution rod assembly can refer to the above embodiments and will not be repeated here. The fire row pieces are arranged along the length direction of the gas distribution rod, and each fire row piece is connected to a nozzle group.

[0035] The rich nozzle on the gas distribution rod can control the single fire bar to produce rich combustion, and the lean nozzle can control the single fire bar to produce lean combustion, thus forming rich and lean combustion. At the same time, the switching state of the first switch valve and the second switch valve can realize four-segment heat load control, which improves the user experience.

[0036] The terms and words used in the above description and claims are not limited to the literal meanings, but are only used by the applicant to enable a clear and consistent understanding of the utility model. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the utility model is provided only for illustration, and not for limiting the utility model as defined by the attached claims and their equivalents.

Claims

1. A multi-segmented gas rod assembly, characterized in that: It includes an air dividing rod, an air inlet passage, a first switch valve and a second switch valve; the surface of the air dividing rod is arranged with a plurality of nozzle groups along the length direction of the air dividing rod, and each nozzle group includes a thick nozzle and a thin nozzle; the air dividing rod is provided with a first cavity, a second cavity, a third cavity and a connecting cavity, the air inlet passage is connected with the first cavity and the connecting cavity, the first switch valve is used to control the connection between the connecting cavity and the second cavity or the isolation between the connecting cavity and the second cavity, the second switch valve is used to control the connection between the connecting cavity and the third cavity or the isolation between the connecting cavity and the third cavity; the nozzle groups include a plurality of first nozzle groups connected with the first cavity, a plurality of second nozzle groups connected with the second cavity and a plurality of third nozzle groups connected with the third cavity, and the number of the third nozzle groups is greater than the number of the second nozzle groups.

2. The multi-segmented gas rod assembly according to claim 1, characterized in that: The thick nozzles and the thin nozzles included in each nozzle group are distributed in the up-down direction, all the thick nozzles are arranged in a row along the length direction of the gas dividing rod, and all the thin nozzles are also arranged in a row along the length direction of the gas dividing rod.

3. The multi-segmented gas rod assembly according to claim 1, characterized in that: The third cavity, the first cavity and the second cavity are arranged along the length direction of the gas dividing rod.

4. The multi-segmented gas rod assembly according to claim 1, characterized in that: The first cavity partially overlaps with the extended path of the air intake channel, and the inner wall of the first cavity is provided with a first opening connecting the air intake channel and the first cavity, and the first opening is located on the extended path of the air intake channel.

5. The multi-segmented gas rod assembly according to claim 1, characterized in that: The side wall of the second cavity is provided with a second opening connected to the connecting cavity, and the side wall of the third cavity is provided with a third opening connected to the connecting cavity; the first switch valve and the second switch valve both include a movable valve core, when the valve core of the first switch valve blocks the second opening, the connecting cavity is connected to the second cavity, when the valve core of the first switch valve is separated from the second opening, the connecting cavity is separated from the second cavity; when the valve core of the second switch valve blocks the third opening, the connecting cavity is connected to the third cavity, when the valve core of the second switch valve is separated from the third opening, the connecting cavity is separated from the third cavity.

6. The multi-segmented gas rod assembly according to any one of claims 1 to 5, characterized in that: The first nozzle group and the second nozzle group are each provided with two nozzles, and the third nozzle group is provided with five nozzles.

7. A burner, characterized in that: It comprises a plurality of fire bar single pieces and a multi-segmented gas distribution rod assembly as described in any one of claims 1 to 6, wherein the fire bar single pieces are arranged along the length direction of the gas distribution rod, and each fire bar single piece is connected to a nozzle group.

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