Ejecting pipe assembly and combustor

Abstract

The utility model provides an injection pipe assembly and a combustor. The injection pipe assembly comprises an injection pipe and a fixing support for fixing the injection pipe, the injection pipe sequentially comprises an injection pipe body and a sleeve in the gas flowing direction, the injection pipe body sequentially comprises a contraction section, a mixing section and an expansion section in the gas flowing direction, the diameter of the expansion section is larger than that of the mixing section, the expansion section is communicated with the sleeve, and the expansion section is communicated with the sleeve. The tail end of the sleeve is used for being connected with a fire distributor, the sleeve is fixed to the fixing support and protrudes towards the fire distributor relative to the fixing support, and the wall thickness of the sleeve is larger than that of the injection pipe body. According to the injection pipe assembly and the combustor, the injection pipe is divided into the injection pipe main body and the sleeve, and the wall thickness of the sleeve is larger than that of the injection pipe main body, so that the sleeve and the fire distributor can be sealed through end faces, and it is well guaranteed that air leakage is not prone to occurring between the injection pipe and the fire distributor.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to an ejector tube assembly and a burner. Background Art

[0002] The burner is a critical component of a gas stove, determining its performance. A gas stove typically consists of a panel, a base, and a burner. The panel is fixed to the top of the base, equipped with a pot holder for supporting pots. The panel and base together form a cavity, into which the bottom of the burner's burner extends and is fixedly connected to the base. The burner includes a burner for mixing gas and primary air. The burner has an ejector pipe connected to a gas supply. The ejector pipe primarily mixes gas provided by the gas supply with primary air. Existing ejector pipes typically have a converging section, a mixing section connected to one end of the converging section, and a diffuser section connected to the end of the mixing section facing away from the converging section.

[0003] The existing ejector tube installed on the bracket has the following problems:

[0004] 1. If the overall wall thickness of the ejector tube is made thicker, it will lead to a heavier weight, higher cost, and difficulty in forming the bend during molding. Therefore, the thickness of the existing ejector tube is relatively thin. The thin ejector tube and the ignition distributor can only be sealed by the radial side, which is prone to air leakage.

[0005] 2. In order to prevent air leakage from occurring when the thinner ejector tube and the ignition divider are fitted together, the length of the ejector tube extending out of the bracket in the prior art is generally more than 10 mm. Although the longer fitting length can better prevent air leakage between the ejector tube and the ignition divider, it also makes it difficult to take and place the ignition divider. The ignition divider needs to be taken and placed vertically upward and downward. If the ignition divider is slightly tilted when being taken and placed, it is easy to get stuck, which reduces the user experience. If the ignition divider is not put in place, it may even leak and cause a safety accident. Utility Model Content

[0006] In view of this, the purpose of the present invention is to provide an ejector tube assembly and a burner with better sealing effect.

[0007] The technical solution used in the present invention is: an ejector tube assembly, including an ejector tube and a fixed bracket for fixing the ejector tube, the ejector tube including an ejector tube body and a sleeve in sequence along the flow direction of the gas, the ejector tube body including a contraction section, a mixing section and an expansion section in sequence along the flow direction of the gas, the diameter of the expansion section is larger than the diameter of the mixing section, the expansion section is connected to the sleeve, the end of the sleeve is used to connect to the ignition divider, the sleeve is fixed on the fixed bracket, and protrudes toward the ignition divider relative to the fixed bracket, and the wall thickness of the sleeve is larger than the wall thickness of the ejector tube body.

[0008] Preferably, the length of the sleeve extending outward relative to the fixing bracket is 3 mm to 8 mm, and the end of the ejector tube is inserted into the sleeve, or the head end of the sleeve is inserted into the end of the ejector tube.

[0009] Preferably, the fixing bracket has a flange structure that is flipped out toward the ejector tube body at the location where the sleeve is installed, the head end of the sleeve is inserted into the flange hole formed by the flange structure, the ejector tube body has a flared section at the tail end, and after the head end of the sleeve is inserted into the flange hole, it passes through the flange hole and extends into the flared section of the ejector tube body.

[0010] Preferably, the flange structure is perpendicular to the main body of the fixing bracket.

[0011] Preferably, the lower end surface of the flanging structure is welded to the upper end surface of the flared section; or, the flanging structure also extends into the ejector tube body, and the flanging structure is located between the ejector tube body and the sleeve.

[0012] Preferably, both ends of the sleeve have a limiting portion protruding inward and a connecting portion extending outward, respectively. The sleeve is fixedly connected to the fixed bracket through the connecting portion, the ejector tube body passes through the fixed bracket and extends into the sleeve, and the end of the ejector tube body abuts the limiting portion.

[0013] Preferably, the wall thickness of the sleeve is 1.5 to 3 times the wall thickness of the ejector tube body; and / or the wall thickness of the sleeve is 1 mm to 3 mm.

[0014] The utility model also provides a burner, including the ejector tube assembly, the flame distributor, and the outer ring fire cover, the outer ring fire cover is installed above the flame distributor, the flame distributor is provided with a sleeve mounting position for mounting the sleeve, the end of the sleeve is installed in the sleeve mounting position, the sleeve mounting position has an end face matching portion, and the end face of the sleeve is tightly matched with the end face matching portion.

[0015] Preferably, the sleeve mounting position has a mounting portion extending toward the ejector tube body, the mounting portion surrounds the sleeve mounting position, the end face matching portion protrudes toward the inside of the mounting position, the sleeve end is inserted into the sleeve mounting position, and the end face is tightly matched with the end face matching portion.

[0016] Preferably, a plurality of main fire holes are provided at intervals on the circumference of the outer side of the outer wall of the fire cover body of the outer ring fire cover, and a plurality of 4-9 secondary fire holes are provided at the outlet of the outer ejection tube of the outer ring fire cover, and the aperture of the secondary fire hole is smaller than the aperture of the main fire hole. The outer side surface of the fire cover body has a flame stabilizing groove with an opening facing outward and extending circumferentially, and the flame stabilizing groove is located below the main fire hole. A plurality of lower flame stabilizing holes are provided at intervals on the circumference of the inner side of the outer wall of the fire cover body, and the lower flame stabilizing holes are connected with the flame stabilizing groove, and the flame stabilizing groove is connected with the main fire hole; a plurality of upper flame stabilizing holes are also provided at intervals on the circumference of the outer wall of the fire cover body, and some adjacent upper flame stabilizing holes are separated from each other by main fire holes or secondary fire holes.

[0017] The ejector tube assembly and burner provided by the utility model divide the ejector tube into an ejector tube body and a sleeve, and the wall thickness of the sleeve is greater than that of the ejector tube body, so that the sleeve and the ignition divider can be sealed through the end face, which better ensures that there is no air leakage between the ejector tube and the ignition divider. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other purposes, features and advantages of the present invention will become more apparent through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally scaled to actual size. The emphasis is on illustrating the subject matter of the present invention.

[0019] Figure 1 This is a structural schematic diagram of the ejector tube assembly provided by the utility model.

[0020] Figure 2 This is a schematic diagram of the main structure of the ejector tube provided by the utility model.

[0021] Figure 3 This is a schematic diagram of the burner structure provided by the utility model.

[0022] Figure 4 This is a schematic diagram of the fixed bracket structure provided by the utility model.

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the burner provided by the utility model.

[0024] Figure 6 This is a schematic diagram of the outer ring fire cover structure provided by the utility model.

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the outer ring fire cover provided by the utility model.

[0026] Figure 8 This is a schematic diagram of one of the ejector tubes and fixed direct connection methods provided by the utility model.

[0027] Figure 9 This is a schematic diagram of one of the ejector tubes and fixed direct connection methods provided by the utility model. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments given do not limit the present invention. In this embodiment, it should be understood that the directions or positional relationships indicated by terms such as "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention.

[0029] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0030] Please refer to Figures 1 to 9 An embodiment of the present invention provides an ejector tube assembly, including an ejector tube and a fixed bracket 50 for fixing the ejector tube. The ejector tube includes an ejector tube body 201 and a sleeve 202 in sequence along the gas flow direction. The ejector tube body 201 includes a contraction section 2011, a mixing section 2012, and an expansion section 2013 in sequence along the gas flow direction. The diameter of the end of the expansion section 2013 is larger than the diameter of the mixing section 2012. The expansion section 2013 is connected to the sleeve 202. The end of the sleeve 202 is used to connect to the ignition distributor 40. The sleeve 202 is fixed on the fixed bracket 50 and protrudes relative to the fixed bracket 50 toward the ignition distributor 40. The wall thickness of the sleeve 202 is greater than the wall thickness of the ejector tube body 201.

[0031] The ejector tube assembly provided by the present invention divides the ejector tube into an ejector tube body 201 and a sleeve 202. The wall thickness of the ejector tube body 201 can be made relatively thin, which can maintain relatively low costs and ensure better processing and molding. At the same time, the present invention is also equipped with a relatively thick-walled sleeve 202. Because the thick wall thickness of the sleeve 202 end face is relatively thick, the sleeve 202 and the fire divider 40 can be sealed through the end face, which effectively ensures that the sleeve 202 and the fire divider 40 are not easily leaked. At the same time, because the present invention uses a thick-walled sleeve 202, the length of the sleeve 202 extending from the fixed bracket 50 can be shortened, which can also solve the problem of difficult access to the fire divider, and avoid fire leakage and safety accidents if the fire divider is not properly placed.

[0032] In a preferred embodiment, the sleeve and the ejector tube body are connected in the following manner: the ejector tube end is inserted into the sleeve, or the sleeve head is inserted into the ejector tube end, and then fixed by welding, which can better avoid the risk of air leakage.

[0033] In a preferred embodiment, the length of the sleeve 202 extending outward relative to the fixing bracket 50 is less than 8 mm.

[0034] refer to Figure 1 In a preferred embodiment, the sleeve extends outward from the fixing bracket by 3mm-8mm. Because the present invention utilizes a thicker-walled sleeve 202, it effectively resolves the problem of air leakage during assembly with the ignition distributor 40. Furthermore, the sleeve extends outward from the fixing bracket 50 by 3mm-8mm. While further ensuring a tight seal during assembly, the shorter extension also makes it easier to remove and place the ignition distributor.

[0035] refer to Figure 1 and Figure 5 In a preferred embodiment, the wall thickness of the sleeve 202 is 1.5 to 3 times the wall thickness of the ejector tube body 201; and / or, the wall thickness of the sleeve 202 is 1 mm to 3 mm. By properly limiting the wall thickness of the sleeve 202, the function of the ejector tube itself is not affected. Furthermore, the appropriate wall thickness of the sleeve 202 effectively seals the sleeve 20 with the ignition distributor 40 through the end surface, effectively preventing gas leakage.

[0036] refer to Figure 4-5 In a preferred embodiment, the fixing bracket 50 has a flange structure 502 at the mounting point of the sleeve 202, which extends toward the ejector tube body 201. The leading end of the sleeve 202 is inserted into the flange hole formed by the flange structure. In a further preferred embodiment, the flange structure 502 is perpendicular to the fixing bracket body 503. The flange structure 502 on the fixing bracket 50 serves as a position limiter and ensures that the sleeve 202 is vertical. The leading and trailing ends referred to in this utility model are defined along the direction of gas flow.

[0037] refer to Figure 5In a preferred embodiment, the ejector tube body 201 has a flared section 2014 at the tail end. The sleeve 202 is inserted into the flange hole at its head end and then passes through the flange hole into the flared section 2014 of the ejector tube body 201 to connect with the ejector tube body 201. Ensure that the sleeve 202 and the ejector tube body 201 are tightly fitted. The lower end face of the flange structure 502 is fitted and connected to the upper end face of the ejector tube body 201. The lower end face of the flange structure 502 is welded to the upper end face of the ejector tube body 201 to ensure that the weld is sealed and leak-proof, and that the sleeve 202 and the ejector tube body 201 are better connected and leak-proof. The "upper" and "lower" referred to in this embodiment refer to the following: Figure 5 The installation direction is shown in the figure.

[0038] refer to Figure 8 In one preferred embodiment, the leading end of the sleeve 202 is inserted into the flanged hole, then passes through the fixing bracket and extends into the flared section 2014 of the ejector tube body 201. The flanged structure 502 also extends into the flared section 2014 of the ejector tube body 201. The flanged structure is located between the ejector tube body 201 and the sleeve 202. The sleeve 202, the ejector tube body 201, and the fixing bracket 50 are fixed by welding.

[0039] refer to Figure 9 In one preferred embodiment, the two ends of the sleeve 202 respectively have a limiting portion 2021 protruding inward and a connecting portion 2022 extending outward. The sleeve 202 is fixedly connected to the fixed bracket 50 through the connecting portion 2022. The ejector tube body 201 passes through the fixed bracket 50 and extends into the sleeve 202, and the end of the ejector tube body 201 abuts the limiting portion 2021.

[0040] refer to Figure 3-5 The present invention further provides a burner comprising the ejector tube assembly, the igniter 40, and the outer ring fire cover 90 as described in any of the above embodiments. The igniter 40 is provided with a sleeve mounting position for mounting the sleeve 202, and the distal end of the sleeve 202 is mounted in the sleeve mounting position. The sleeve mounting position has an end face fitting portion 41, and the distal end face of the sleeve 202 is tightly fitted with the end face fitting portion 41. The present invention utilizes a relatively thick sleeve 202 wall thickness to achieve a better end face fitting seal between the sleeve 202 and the igniter 40, thereby achieving a better sealing effect and preventing air leakage.

[0041] refer to Figure 5In a preferred embodiment, the sleeve mounting area has a mounting portion 42 extending toward the ejector tube body. Mounting portion 42 surrounds the sleeve mounting area, and end surface mating portion 41 protrudes toward the interior of the mounting area. The distal end of sleeve 202 is inserted into the sleeve mounting area, with the distal end surface tightly mating with end surface mating portion 41. This structure not only ensures better installation and positioning of sleeve 202, but also provides a better seal through the end surface mating, resulting in a more effective installation and sealing effect between the ejector tube and the ignition distributor.

[0042] refer to Figure 3 , Figure 6-7 In a preferred embodiment, the ejector tube includes an outer ejector tube 20a and an inner ejector tube 20b, and the outer ejector tube 20a and the inner ejector tube 20b are respectively provided with sleeve mounting positions on the ignition distributor 40. A plurality of primary fire holes 911 are provided on the circumference of the outer side of the outer wall of the fire cover body of the outer ring fire cover, and a plurality of 4-9 secondary fire holes 912 are provided at the outlet of the outer ejector tube 20b. The aperture of the secondary fire hole 912 is smaller than that of the primary fire hole 911. The fire cover body The outer side surface has a flame-stabilizing groove 92 with an opening facing outward and extending circumferentially. The flame-stabilizing groove is located below the main fire hole 911. A plurality of lower flame-stabilizing holes 94 are arranged at intervals on the circumference of the inner side of the outer wall of the fire cover body. The lower flame-stabilizing holes 94 are connected to the flame-stabilizing groove 92, and the flame-stabilizing groove 92 is connected to the main fire hole 911; a plurality of upper flame-stabilizing holes 93 are also arranged at intervals on the circumference of the outer side of the outer wall of the fire cover body, and some adjacent upper flame-stabilizing holes 93 are separated from each other by the main fire hole 911 or the auxiliary fire hole 912.

[0043] The burner provided by the present invention forms a large, stable flame at the main fire hole 911, which is used to heat cooking utensils. The flame stabilization groove 92 is connected to the lower flame stabilization hole 94, forming a small, stable flame at the flame stabilization groove 92. This reduces the probability of flame separation and flashback at the main fire hole and increases the stable combustion range. The upper flame stabilization hole 93 cooperates with the main fire hole 911 to increase the stable combustion range, making it less likely to experience flame separation and flameout. Furthermore, it reignites the unburned gas above the main fire hole 911, improving thermal efficiency and reducing smoke.

[0044] Because the gas outlet speed at the outlet of the external ejector tube 20a is faster and the flame is longer than at other positions, by setting the auxiliary fire hole 912 and reducing the aperture, the gas outlet speed of the fire hole at this location can be reduced, making the fire holes of the entire fire cover burn evenly.

[0045] In this specification, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" 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 present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0047] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An ejector tube assembly, characterized in that: It includes an ejector tube and a fixed bracket for fixing the ejector tube. The ejector tube includes an ejector tube body and a sleeve in sequence along the direction of gas flow. The ejector tube body includes a contraction section, a mixing section and an expansion section in sequence along the direction of gas flow. The diameter of the expansion section is larger than the diameter of the mixing section. The expansion section is connected to the sleeve. The end of the sleeve is used to connect to the ignition distributor. The sleeve is fixed on the fixed bracket and protrudes toward the ignition distributor relative to the fixed bracket. The wall thickness of the sleeve is larger than the wall thickness of the ejector tube body.

2. The ejector tube assembly according to claim 1, wherein: The length of the sleeve extending outward relative to the fixed bracket is 3mm-8mm, and the end of the ejector tube is inserted into the sleeve, or the head end of the sleeve is inserted into the end of the ejector tube.

3. The ejector tube assembly according to claim 1, wherein: The fixing bracket has a flange structure that is turned out toward the ejector tube body at the location where the sleeve is installed. The head end of the sleeve is inserted into the flange hole formed by the flange structure. The ejector tube body has a flared section at the tail end. After the head end of the sleeve is inserted into the flange hole, it passes through the flange hole and extends into the flared section of the ejector tube body.

4. The ejector tube assembly according to claim 3, wherein: The flange structure is perpendicular to the main body of the fixing bracket.

5. The ejector tube assembly according to claim 3, wherein: The lower end surface of the flanging structure is welded to the upper end surface of the flared section; or, the flanging structure also extends into the ejector tube body, and the flanging structure is located between the ejector tube body and the sleeve.

6. The ejector tube assembly according to claim 1, wherein: The two ends of the sleeve respectively have a limiting portion protruding inward and a connecting portion extending outward. The sleeve is fixedly connected to the fixed bracket through the connecting portion. The ejector tube body passes through the fixed bracket and extends into the sleeve, and the end of the ejector tube body abuts the limiting portion.

7. The ejector tube assembly according to claim 1, wherein: The wall thickness of the sleeve is 1.5 to 3 times the wall thickness of the ejector tube body; and / or the wall thickness of the sleeve is 1 mm to 3 mm.

8. A burner, characterized in that: It includes the ejector tube assembly, ignition divider, and outer ring fire cover as described in any one of claims 1 to 7, wherein the outer ring fire cover is installed above the ignition divider, and a sleeve mounting position for mounting the sleeve is provided on the ignition divider, and the end of the sleeve is mounted in the sleeve mounting position, and the sleeve mounting position has an end face matching portion, and the end face of the sleeve is tightly matched with the end face matching portion.

9. The burner according to claim 8, characterized in that The sleeve mounting position has a mounting portion extending toward the ejector tube body, the mounting portion surrounds the sleeve mounting position, the end face matching portion protrudes toward the inside of the mounting position, the sleeve end is inserted into the sleeve mounting position, and the end face is tightly matched with the end face matching portion.

10. The burner according to claim 8, wherein The outer ring fire cover has a plurality of main fire holes arranged at intervals on the circumference of the outer side of the outer wall of the fire cover body, and a plurality of 4-9 secondary fire holes are provided at the outlet of the outer ejection tube of the outer ring fire cover, and the aperture of the secondary fire hole is smaller than the aperture of the main fire hole. The outer side surface of the fire cover body has a flame stabilizing groove with an opening facing outward and extending circumferentially, and the flame stabilizing groove is located below the main fire hole. The fire cover body has a plurality of lower flame stabilizing holes arranged at intervals on the circumference of the inner side of the outer wall, and the lower flame stabilizing holes are connected with the flame stabilizing groove, and the flame stabilizing groove is connected with the main fire hole; the fire cover body has a plurality of upper flame stabilizing holes arranged at intervals on the circumference of the outer wall of the fire cover body, and some adjacent upper flame stabilizing holes are separated from each other by main fire holes or secondary fire holes.

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