Supercharged furnace end

Abstract

The utility model relates to the technical field of furnace ends, in particular to a supercharged furnace end, which is characterized in that a furnace end main body comprises an inner injection pipe, an outer injection pipe and a base, and the base comprises a central pipe and an outer sleeve; a gap is formed between the center pipe and the outer sleeve and forms an outer ring air channel, an inner ring air channel is formed in the middle of the center pipe and communicates with the inner injection pipe, and the outer ring air channel communicates with the outer injection pipe; the periphery of the center pipe is sleeved with a pressurizing sleeve, a protruding part is arranged on the pressurizing sleeve, the distance between the protruding part and the outer sleeve is smaller than that between the center pipe and the outer sleeve, and a first narrow section is formed between the protruding part and the outer sleeve. According to the furnace end, the first narrow section is formed in the outer ring gas channel, and the through-flow cross section area of the first narrow section is reduced, so that the flow speed of gas flowing through the first narrow section is increased, the upward gas pressure is increased, the gas flow in unit time is increased, and the upper limit power of the furnace end is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stove heads, in particular to a pressurized stove head. Background Art

[0002] The burner head is generally composed of an ejector tube (including an inner ejector tube and an outer ejector tube) and a base. An inner ring air duct and an outer ring air duct are arranged in the base. The inner ring air duct is connected to the inner ejector tube, and the outer ring air duct is connected to the outer ejector tube. A proportional valve is generally installed at the air inlet end of the ejector tube to control the flux of the gas and thus control the power of the burner head.

[0003] The patent with publication number CN212108387U discloses a stove head, a burner and a cooking device, wherein the sleeve air channel in the patent includes an inner sleeve air channel (equivalent to an inner ring air channel) formed in the tube cavity of the hollow inner sleeve and an outer sleeve air channel (equivalent to an outer ring air channel) formed between the hollow inner sleeve and the hollow outer sleeve, the inner ejector tube, the base inner ring air channel and the inner sleeve air channel are connected in sequence, and the outer ejector tube, the base outer ring air channel and the outer sleeve air channel are connected in sequence.

[0004] Referring to the above patent Figure 3 There is a lack of a pressurizing component in the outer sleeve air passage between the hollow inner sleeve and the hollow outer sleeve, and the power of the burner head (gas flow rate per unit time) is completely dependent on the valve body at the air inlet end of the ejector tube, which limits the upper limit power of the burner head.

[0005] Therefore, a burner that can improve upper limit power is urgently needed. Utility Model Content

[0006] In order to solve the above technical problems, the purpose of the utility model is to provide a pressurized burner head.

[0007] The technical solution adopted by the utility model to solve the problem is:

[0008] A pressurized burner head comprises a burner head body, wherein the burner head body comprises an inner ejector tube, an outer ejector tube and a base, wherein the base comprises a central tube and an outer sleeve, wherein the outer sleeve surrounds the outer circumference of the central tube; a gap is provided between the central tube and the outer sleeve to form an outer ring air passage, an inner ring air passage is provided in the middle of the central tube, the inner ring air passage is connected with the inner ejector tube, and the outer ring air passage is connected with the outer ejector tube; a pressurized sleeve is provided on the outer circumference of the central tube, a protrusion is provided on the pressurized sleeve, a distance between the protrusion and the outer sleeve is smaller than a distance between the central tube and the outer sleeve, and a first narrow section is formed between the protrusion and the outer sleeve.

[0009] As a further improvement of the above technical solution, the outer sleeve includes a tube portion and a necked portion arranged at the upper end of the tube portion, and the distance between the necked portion and the center tube is smaller than the distance between the center tube and the tube portion; a second narrow section is formed between the necked portion and the center tube, and the second narrow section is located above the first narrow section.

[0010] As a further improvement of the above technical solution, the furnace head main body includes an upper cover, a middle cover and a lower cover from top to bottom, the center tube is fixedly connected to the upper cover, and the center tube is fixedly connected to the middle cover; the booster sleeve is provided with a first connecting portion and a second connecting portion, and the first connecting portion and the second connecting portion are respectively arranged on the upper and lower sides of the raised portion; the first connecting portion is welded to the center tube, and the second connecting portion is welded to the middle cover.

[0011] As a further improvement of the above technical solution, the middle cover is provided with a flange, which is arranged longitudinally; the inner side surface of the flange is welded to the outer side surface of the central tube, and the inner side surface of the second connecting part is welded to the outer side surface of the flange.

[0012] As a further improvement of the above technical solution, a step is provided on the middle cover, a through hole is provided on the step, and the flange is provided on the inner wall of the through hole; a limiting ring is provided at the bottom of the center tube, the diameter of the limiting ring is larger than the diameter of the through hole, the center tube passes through the through hole from bottom to top, and the limiting ring is welded to the lower side surface of the step.

[0013] As a further improvement of the above technical solution, the upper cover is provided with a first splicing portion and a second splicing portion which are concave upward, the lower cover is provided with a third splicing portion and a fourth splicing portion which are concave downward, the middle cover is provided with a fifth splicing portion which is concave upward, and the step is provided at the front end of the fifth splicing portion; the outer ejection tube is formed by splicing the first splicing portion and the third splicing portion, and the inner ejection tube is formed by splicing the second splicing portion, the fourth splicing portion and the fifth splicing portion; the projections of the middle cover and the outer ejection tube in the vertical direction do not overlap.

[0014] As a further improvement of the above technical solution, the lower cover is provided with a downwardly recessed groove, and the middle cover is fixedly connected in the groove by spot welding.

[0015] As a further improvement of the above technical solution, the length of the fifth splicing portion is smaller than the length of the fourth splicing portion.

[0016] As a further improvement of the above technical solution, the inner wall of the second splicing part is attached to the outer wall of the fifth splicing part; a clamping strip is provided on the outer wall of the fifth splicing part, and a clamping groove corresponding to the clamping strip is provided on the inner wall of the second splicing part, and the clamping strip is clamped in the clamping groove.

[0017] As a further improvement of the above technical solution, the inner ejector tube and the inner ring air channel are connected through a connecting cavity, and the flow cross-sectional area of ​​the inner ring air channel is smaller than the flow cross-sectional area of ​​the connecting cavity.

[0018] The beneficial effects of the utility model are as follows: the burner head of the utility model is provided with a booster sleeve on the outer periphery of the central tube, a protrusion is provided on the booster sleeve, the distance between the protrusion and the outer sleeve is smaller than the distance between the central tube and the outer sleeve, thereby forming a first narrow section in the outer ring air channel, and the flow cross-sectional area of ​​the first narrow section is reduced, so that the flow velocity of the gas flowing through the first narrow section increases, the upward gas pressure increases, and the gas flow rate per unit time increases, thereby improving the upper limit power of the burner head. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 It is a partial structural sectional view of the utility model;

[0021] Figure 2 This is one of the structural cross-sectional views of the utility model;

[0022] Figure 3 This is the second structural cross-sectional view of the utility model;

[0023] Figure 4 for Figure 2 A schematic diagram of the structure enlargement at the center A;

[0024] Figure 5 for Figure 2 A schematic diagram of the structure enlarged at B in the middle;

[0025] Figure 6 for Figure 2 A schematic diagram of the structure enlarged at C in the middle;

[0026] Figure 7 This is one of the schematic diagrams of the structure decomposition of the utility model;

[0027] Figure 8 This is the second schematic diagram of the structural decomposition of the utility model;

[0028] Fig. 9 It is a schematic diagram of the structure of the utility model;

[0029] In the figure: 1-furnace head body, 11-upper cover, 111-first splicing part, 112-second splicing part, 1121-slot, 113-outer sleeve, 1131-tube part, 1132-narrowing part, 12-middle cover, 121-step, 1211-through hole, 1212-flange, 122-fifth splicing part, 1221-strip, 13-lower cover, 131-third splicing part, 132-fourth splicing part, 133-groove, 2-outer ring airway, 21-first narrow section, 22-second narrow section, 3-inner ring airway, 4-connecting cavity, 5-center tube, 51-limiting ring, 6-boosting sleeve, 61-first connecting part, 62-raised part, 63-second connecting part. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, 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 invention 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 cannot be understood as a limitation on the present invention.

[0032] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] Reference Figures 1 to 9A pressurized burner head comprises a burner head body 1, wherein the burner head body 1 comprises an inner ejection tube, an outer ejection tube and a base, wherein the base comprises a central tube 5 and an outer sleeve 113, wherein the outer sleeve 113 surrounds the outer periphery of the central tube 5; a gap is provided between the central tube 5 and the outer sleeve 113 to form an outer ring airway 2, wherein the central tube 5 passes through the middle to form an inner ring airway 3, wherein the inner ring airway 3 is connected with the inner ejection tube, and the outer ring airway 2 is connected with the outer ejection tube; a pressurized sleeve 6 is provided on the outer periphery of the central tube 5, wherein a protrusion 62 is provided on the pressurized sleeve 6, wherein the protrusion 62 extends in all directions in the transverse direction and occupies the space of the outer ring airway 2, wherein the distance between the protrusion 62 and the outer sleeve 113 (tube portion 1131) is smaller than the distance between the central tube 5 and the outer sleeve 113 (tube portion 1131), and a first narrow section 21 is formed between the protrusion 62 and the outer sleeve 113. After the outer ring gas flows from the outer injection pipe to the outer ring gas channel 2, it flows through the first narrow section 21. Since the flow cross-sectional area of ​​the first narrow section 21 is reduced, the flow velocity of the gas flowing through the first narrow section 21 increases, the gas flow rate per unit time increases, and the upper limit power of the burner is increased.

[0035] In a preferred embodiment, the outer sleeve 113 includes a tube portion 1131 and a constricted portion 1132 disposed at the upper end of the tube portion 1131, wherein the distance between the constricted portion 1132 and the central tube 5 is smaller than the distance between the central tube 5 and the tube portion 1131; a second narrow section 22 is formed between the constricted portion 1132 and the central tube 5, the second narrow section 22 is located above the first narrow section 21, and there is a gap between the first narrow section 21 and the second narrow section 22. By disposing the second narrow section 22 above the first narrow section 21, the flow rate of the gas flowing through the second narrow section 22 is increased twice, thereby further increasing the upper limit power of the burner.

[0036] In a preferred embodiment, the furnace head body 1 is composed of an upper cover 11, a middle cover 12 and a lower cover 13, which are spliced ​​from top to bottom. The center tube 5 is integrally arranged on the upper cover 11, and the center tube 5 is welded to the middle cover 12. The booster sleeve 6 is provided with a first connection portion 61 and a second connection portion 63, which are respectively arranged on the upper and lower sides of the protrusion 62. The first connection portion 61 is welded to the center tube 5, and the second connection portion 63 is welded to the middle cover 12. By providing the first connection portion 61 and the second connection portion 63 on the booster sleeve 6, the first connection portion 61 is welded to the center tube 5, and the second connection portion 63 is welded to the middle cover 12, the assembly stability among the middle cover 12, the center tube 5 and the booster sleeve 6 is improved.

[0037] Furthermore, in some embodiments, the middle cover 12 is provided with a flange 1212, and the flange 1212 is longitudinally provided; the inner side surface of the flange 1212 is welded to the outer side surface of the center tube 5, and the inner side surface of the second connection portion 63 is welded to the outer side surface of the flange 1212. By providing the flange 1212 on the middle cover 12, the center tube 5 and the second connection portion 63 are respectively welded to the inner and outer sides of the flange 1212, so that the middle cover 12, the center tube 5 and the booster sleeve 6 are fixedly connected together.

[0038] Furthermore, in some embodiments, the diameter of the second connection portion 63 is smaller than the diameter of the protrusion 62, the distance between the second connection portion 63 and the outer sleeve 113 is larger than the distance between the protrusion 62 and the outer sleeve 113, and a spacious section is formed between the second connection portion 63 and the outer sleeve 113. The gas passes through the spacious section and the first narrow section 21 from bottom to top in sequence. Since the flow cross-sectional area of ​​the first narrow section 21 is smaller than the flow cross-sectional area of ​​the spacious section, the flow rate of the gas flowing through the first narrow section 21 is increased.

[0039] Furthermore, in some embodiments, the middle cover 12 is provided with a step 121, the step 121 is provided with a through hole 1211, the flange 1212 is provided on the inner side wall of the through hole 1211, and the flange 1212 extends upward on the inner side wall of the through hole 1211; a limiting ring 51 is provided at the bottom of the center tube 5, the diameter of the limiting ring 51 is larger than the diameter of the through hole 1211, the center tube 5 passes through the through hole 1211 from bottom to top, and the limiting ring 51 is welded to the lower side of the step 121. The limiting ring 51 on the center tube 5 is welded to the lower side of the step 121, and the flange 1212 is welded to the outer side of the center tube 5, forming an L-shaped double air sealing structure, making the furnace head safer.

[0040] Specifically, in some embodiments, the upper cover 11 is integrally provided with a first splicing portion 111 and a second splicing portion 112 that are concave upward, the lower cover 13 is integrally provided with a third splicing portion 131 and a fourth splicing portion 132 that are concave downward, the middle cover 12 is provided with a fifth splicing portion 122 that is concave upward, and the step 121 is provided at the front end of the fifth splicing portion 122; the outer ejection tube is formed by splicing the first splicing portion 111 and the third splicing portion 131, and the inner ejection tube is formed by splicing the second splicing portion 112, the fourth splicing portion 132 and the fifth splicing portion 122; the projections of the middle cover 12 and the outer ejection tube in the vertical direction do not overlap. The projections of the middle cover 12 and the outer ejection tube in the vertical direction do not overlap, which simplifies the structure of the middle cover 12 and makes the furnace head body 1 lightweight.

[0041] Furthermore, in a preferred embodiment, a groove 133 is provided on the lower cover 13, and the middle cover 12 is fixedly connected in the groove 133 by spot welding, so as to improve the assembly stability between the middle cover 12 and the lower cover 13.

[0042] In a preferred embodiment, the length of the fifth joint portion 122 is less than the length of the fourth joint portion 132. The structure of the middle cover 12 is further simplified, and the furnace head body 1 is further lightened.

[0043] In a preferred embodiment, the inner wall of the second splicing part 112 is attached to the outer wall of the fifth splicing part 122; a clamping strip 1221 is provided on the outer wall of the fifth splicing part 122, and a clamping groove 1121 corresponding to the clamping strip 1221 is provided on the inner wall of the second splicing part 112, and the clamping strip 1221 is clamped in the clamping groove 1121. The assembly stability between the middle cover 12 and the upper cover 11 is improved.

[0044] In a preferred embodiment, the inner ejector tube and the inner ring gas channel 3 are connected via a connecting cavity 4, the connecting cavity 4 is in an ampulla shape, and the flow cross-sectional area of ​​the inner ring gas channel 3 is smaller than the minimum flow cross-sectional area of ​​the connecting cavity 4. By providing the connecting cavity 4, the flow cross-sectional area of ​​the inner ring gas channel 3 is smaller than the flow cross-sectional area of ​​the connecting cavity 4, thereby increasing the flow velocity of the gas passing through the inner ring gas channel 3, and further increasing the upper limit power of the burner body 1.

[0045] Specifically, the upper cover 11, the middle cover 12 and the lower cover 13 are all stamped parts.

[0046] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the utility model concept, or directly or indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pressurized burner, comprising a burner body (1), the burner body (1) comprising an inner ejector tube, an outer ejector tube and a base, the base comprising a central tube (5) and an outer sleeve (113), the outer sleeve (113) surrounding the outer circumference of the central tube (5); There is a gap between the central tube (5) and the outer tube (113) to form an outer ring air passage (2); an inner ring air passage (3) is provided in the middle of the central tube (5); the inner ring air passage (3) is communicated with the inner ejection tube; and the outer ring air passage (2) is communicated with the outer ejection tube; Features: A booster sleeve (6) is sleeved on the outer periphery of the central tube (5), and a protrusion (62) is provided on the booster sleeve (6). The distance between the protrusion (62) and the outer sleeve (113) is smaller than the distance between the central tube (5) and the outer sleeve (113), and a first narrow section (21) is formed between the protrusion (62) and the outer sleeve (113).

2. A pressurized burner head as claimed in claim 1, characterized in that: The outer sleeve (113) comprises a tube portion (1131) and a necked portion (1132) arranged at the upper end of the tube portion (1131), wherein the distance between the necked portion (1132) and the central tube (5) is smaller than the distance between the central tube (5) and the tube portion (1131); A second narrow section (22) is formed between the necked portion (1132) and the central tube (5), and the second narrow section (22) is located above the first narrow section (21).

3. A pressurized burner head as claimed in claim 1, characterized in that: The furnace head body (1) comprises, from top to bottom, an upper cover (11), a middle cover (12) and a lower cover (13); the central tube (5) is fixedly connected to the upper cover (11), and the central tube (5) is fixedly connected to the middle cover (12); The booster sleeve (6) is provided with a first connecting portion (61) and a second connecting portion (63), wherein the first connecting portion (61) and the second connecting portion (63) are respectively arranged on the upper and lower sides of the protruding portion (62); The first connection portion (61) is welded to the central tube (5), and the second connection portion (63) is welded to the middle cover (12).

4. A pressurized burner head as claimed in claim 3, characterized in that: The middle cover (12) is provided with a flange (1212), and the flange (1212) is arranged longitudinally; The inner side surface of the flange (1212) is welded to the outer side surface of the central tube (5), and the inner side surface of the second connecting portion (63) is welded to the outer side surface of the flange (1212).

5. A pressurized burner head as claimed in claim 4, characterized in that: The middle cover (12) is provided with a step (121), the step (121) is provided with a through hole (1211), and the flange (1212) is provided on the inner side wall of the through hole (1211); A limiting ring (51) is provided at the bottom of the central tube (5); the diameter of the limiting ring (51) is greater than the diameter of the through hole (1211); the central tube (5) passes through the through hole (1211) from bottom to top; and the limiting ring (51) is welded to the lower side of the step (121).

6. A pressurized burner head as claimed in claim 5, characterized in that: The upper cover (11) is provided with a first splicing portion (111) and a second splicing portion (112) which are concave upwards, the lower cover (13) is provided with a third splicing portion (131) and a fourth splicing portion (132) which are concave downwards, the middle cover (12) is provided with a fifth splicing portion (122) which is concave upwards, and the step (121) is provided at the front end of the fifth splicing portion (122); The outer ejector tube is formed by splicing the first splicing portion (111) and the third splicing portion (131), and the inner ejector tube is formed by splicing the second splicing portion (112), the fourth splicing portion (132) and the fifth splicing portion (122); The projections of the middle cover (12) and the outer ejection tube in the vertical direction do not overlap.

7. A pressurized burner head as claimed in claim 6, characterized in that: The lower cover (13) is provided with a groove (133) that is recessed downwards, and the middle cover (12) is fixedly connected in the groove (133) by spot welding.

8. A pressurized burner head as claimed in claim 6, characterized in that: The length of the fifth splicing portion (122) is smaller than the length of the fourth splicing portion (132).

9. A pressurized burner head as claimed in claim 8, characterized in that: The inner wall of the second splicing portion (112) is attached to the outer wall of the fifth splicing portion (122); A clamping strip (1221) is provided on the outer wall of the fifth splicing portion (122), and a clamping groove (1121) corresponding to the clamping strip (1221) is provided on the inner wall of the second splicing portion (112), and the clamping strip (1221) is clamped in the clamping groove (1121).

10. A pressurized burner head as claimed in claim 1, characterized in that: The inner ejector tube and the inner ring air channel (3) are connected via a connecting cavity (4), and the flow cross-sectional area of ​​the inner ring air channel (3) is smaller than the flow cross-sectional area of ​​the connecting cavity (4).

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