Combined center fire cover

Abstract

The invention discloses a combined central fire cover, comprising an upper fire cover and a lower fire cover, wherein the upper fire cover comprises a top cover, and the lower fire cover comprises a ring-shaped bottom cover, wherein a first sleeve, a second sleeve and a third sleeve are arranged between the top cover and the bottom cover, wherein the second sleeve is sleeved on the outside of the first sleeve, and the third sleeve is sleeved on the outside of the second sleeve, wherein the bottom of the first sleeve and the bottom of the third sleeve are both fixedly connected to the bottom cover, and the top of the second sleeve is fixedly connected to the top cover, wherein a first gap is arranged between the top of the first sleeve and the top cover, and a second gap is arranged between the bottom of the second sleeve and the bottom cover; the top cover has a first outer edge, which is arranged above the third sleeve, and a plurality of flame spraying ports are arranged on the first outer edge. When the gas flows, it first passes through the bottom cover to reach the inner side of the first sleeve, and then passes through the first gap and the second gap in sequence and then sprays out from the flame spraying ports, and the gas flows back and forth in the area between the top cover and the bottom cover, and the flow path is relatively long, and the phenomenon of backfire is not easy to occur.

Description

Technical Field

[0001] The invention relates to the technical field of gas stoves, in particular to a combined central fire cover. Background Art

[0002] The fire cover, also known as the flame distributor, is a component in the burner used to disperse the gas and evenly spray it from multiple flame outlets; the existing center fire cover, such as the energy-saving direct injection center fire cover disclosed in patent CN207230549U, includes a boss, a plurality of flame outlets are arranged on the boss, a hollow cylinder is arranged at the bottom of the boss, one end of the hollow cylinder is connected to the flame outlet to form a jet chamber; such a center fire cover has a short gas flow path and is prone to backfire. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a combined center fire cover, which is not prone to flashback.

[0004] According to an embodiment of the present invention, the combined central fire cover comprises an upper fire cover and a lower fire cover, the upper fire cover comprises a top cover, the lower fire cover comprises an annular bottom cover, a first sleeve, a second sleeve and a third sleeve are arranged between the top cover and the bottom cover, the first sleeve, the second sleeve and the third sleeve are all arranged vertically, the second sleeve is sleeved on the outside of the first sleeve, the third sleeve is sleeved on the outside of the second sleeve, the bottom of the first sleeve and the bottom of the third sleeve are both fixed to the bottom cover, the top of the second sleeve is fixed to the top cover, a first gap is arranged between the top of the first sleeve and the top cover, and a second gap is arranged between the bottom of the second sleeve and the bottom cover; a support member is arranged between the upper fire cover and the lower fire cover, and the upper fire cover is connected to the lower fire cover through the support member; the top cover has a first outer edge, the first outer edge is arranged above the third sleeve, a plurality of flame vents are arranged on the first outer edge, and the flame vents are connected to the second gap.

[0005] The combined center fire cover according to the embodiment of the present invention has at least the following technical effects: by arranging the first sleeve, the second sleeve and the third sleeve, when the gas flows, it first passes through the bottom cover to reach the inner side of the first sleeve, and then passes through the first gap and the second gap in sequence and is ejected from the flame outlet. The gas flows back and forth in the area between the top cover and the bottom cover, the flow path is long, and the backfire phenomenon is not easy to occur.

[0006] According to some embodiments of the present invention, a positioning boss is provided on the bottom surface of the bottom cover, and the positioning boss is ring-shaped.

[0007] According to some embodiments of the present invention, a third gap is provided between the first outer edge and the third sleeve.

[0008] According to some embodiments of the present invention, the first sleeve, the third sleeve and the bottom cover are integrally formed components, and the second sleeve and the top cover are integrally formed components.

[0009] According to some embodiments of the present invention, the first outer edge is ring-shaped, and the first outer edge is inclined downward from the inside to the outside.

[0010] According to some embodiments of the present invention, a plurality of notches are provided at the bottom of the first outer edge, the notches are the flame-spraying ports, and the first outer edge protrudes outward from the third sleeve.

[0011] According to some embodiments of the present invention, the support member is disposed in the first gap, the support member is annular, a plurality of first through grooves are disposed on the top of the support member, the first through grooves extend radially along the support member, the bottom of the support member is fixedly connected to the first sleeve, and the top of the support member abuts against the top cover.

[0012] According to some embodiments of the present invention, an annular groove is provided on the bottom surface of the top cover, and the top of the support member is disposed in the annular groove.

[0013] According to some embodiments of the present invention, a plurality of flame stabilizing holes are provided on the third sleeve.

[0014] According to some embodiments of the present invention, the flame stabilizing holes are arranged to be inclined upward from inside to outside.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a structural front view of an embodiment of the present invention;

[0018] Figure 2 yes Figure 1 A cross-sectional schematic diagram of

[0019] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the lower fire cover.

[0020] Reference numerals:

[0021] The upper fire cover 100 , the first outer edge 110 , the flame vent 111 , the top cover 120 , the second sleeve 130 , the lower fire cover 200 , the positioning boss 210 , the first sleeve 220 , the third sleeve 230 , the flame stabilizing hole 231 , the support member 240 , the first through groove 241 , and the bottom cover 250 . DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which 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 with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the directions or positional relationships indicated, such as up, down, front, back, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 limiting the present invention. In addition, the meaning of "several" is one or more, the meaning of "many" is 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 the first and the second, it is only 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.

[0024] 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.

[0025] Reference below Figures 1 to 3 A modular center fire cover according to an embodiment of the present invention is described.

[0026] The combined central fire cover according to the embodiment of the present invention comprises an upper fire cover 100 and a lower fire cover 200, wherein the upper fire cover 100 comprises a top cover 120, and the lower fire cover 200 comprises an annular bottom cover 250, wherein a first sleeve 220, a second sleeve 130 and a third sleeve 230 are arranged between the top cover 120 and the bottom cover 250, wherein the first sleeve 220, the second sleeve 130 and the third sleeve 230 are all arranged vertically, the second sleeve 130 is sleeved on the outside of the first sleeve 220, the third sleeve 230 is sleeved on the outside of the second sleeve 130, and the bottoms of the first sleeve 220 and the third sleeve 230 are both It is fixedly connected to the bottom cover 250, the top of the second sleeve 130 is fixedly connected to the top cover 120, a first gap is provided between the top of the first sleeve 220 and the top cover 120, and a second gap is provided between the bottom of the second sleeve 130 and the bottom cover 250; a support member 240 is provided between the upper fire cover 100 and the lower fire cover 200, and the upper fire cover 100 and the lower fire cover 200 are connected by the support member 240; the top cover 120 has a first outer edge 110, the first outer edge 110 is provided above the third sleeve 230, and a plurality of flame-spraying ports 111 are provided on the first outer edge 110, and the flame-spraying ports 111 are connected to the second gap.

[0027] For example, Figures 1 to 3 As shown, the upper fire cover 100 includes a circular top cover 120 and a second sleeve 130 arranged at the lower side of the top cover 120, and the top edge of the second sleeve 130 is sealed and fixedly connected to the top cover 120; the lower fire cover 200 includes an annular bottom cover 250 and a first sleeve 220 and a third sleeve 230 arranged on the upper side of the bottom cover 250, the bottom edge of the first sleeve 220 is sealed and fixedly connected to the inner edge of the bottom cover 250, and the bottom edge of the third sleeve 230 is sealed and fixedly connected to the outer edge of the bottom cover 250, and the second sleeve 130 is inserted between the first sleeve 220 and the third sleeve 230, then a "U"-shaped channel is formed between the top cover 120 and the bottom cover 250, and the two ends of the "U"-shaped channel are respectively connected to the inner side of the first sleeve 220 and the flame-spraying port 111.

[0028] By setting the first sleeve 220, the second sleeve 130 and the third sleeve 230, when the gas flows, it first passes through the bottom cover 250 to reach the inner side of the first sleeve 220, and then passes through the first gap and the second gap in sequence and is ejected from the flame outlet 111. The gas flows back and forth in the area between the top cover 120 and the bottom cover 250. The flow path is longer, which increases the length of the gas channel, which is equivalent to increasing the wall thickness of the fire cover, and is less likely to cause backfire.

[0029] In some embodiments of the present invention, the bottom surface of the bottom cover 250 is provided with a positioning boss 210, and the positioning boss 210 is annular. In this way, the lower fire cover 200 can be stably placed on the product burner to avoid the center fire cover from shaking left and right, leaking, etc.

[0030] In some embodiments of the present invention, a third gap is provided between the first outer edge 110 and the third sleeve 230. In this way, part of the gas will be ejected from the third gap to form an auxiliary flame, which heats the root of the main flame at the flame outlet 111 and avoids the occurrence of flame separation.

[0031] In some embodiments of the present invention, the first sleeve 220, the third sleeve 230 and the bottom cover 250 are integrally formed components, and the second sleeve 130 and the top cover 120 are integrally formed components. This has a simple structure, is easy to process, and can be mass-produced and used.

[0032] In some embodiments of the present invention, the first outer edge 110 is annular, and the first outer edge 110 is inclined downward from the inside to the outside. Figure 2 As shown, the first outer edge 110 is in a conical ring shape, and a flame stabilizing chamber is formed between the first outer edge 110 and the second sleeve 130, which has a certain buffering effect on the gas sprayed from the second gap, thereby reducing the gas flow rate and stabilizing the flame.

[0033] In some embodiments of the present invention, a plurality of notches are provided at the bottom of the first outer edge 110, the notches are flame vents 111, and the first outer edge 110 protrudes outward from the third sleeve 230. In this way, the soup and overflow dripping from above will drip along the first outer edge 110, preventing the soup and overflow from clogging the flame vents 111, and the soup and overflow will not drip onto the lower fire cover 200.

[0034] In some embodiments of the present invention, the support member 240 is disposed in the first gap, the support member 240 is annular, a plurality of first through grooves 241 are disposed on the top of the support member 240, the first through grooves 241 extend along the radial direction of the support member 240, the bottom of the support member 240 is fixedly connected to the first sleeve 220, and the top of the support member 240 abuts against the top cover 120. In this way, the upper fire cover 100 can be directly placed on the lower fire cover 200, the top of the support member 240 abuts against the top cover 120, so that a second gap is left between the second sleeve 130 and the bottom cover 250, and the gas flows from the inside of the first sleeve 220 through the first through grooves 241 and the second gap and then sprays out from the flame-spraying port 111; the upper fire cover 100 and the lower fire cover 200 are two independent components, which is convenient for production.

[0035] In order to prevent the upper fire cover 100 from shaking left and right, in some embodiments of the present invention, an annular groove is provided on the bottom surface of the top cover 120, and the top of the support member 240 is disposed in the annular groove.

[0036] In some embodiments of the present invention, a plurality of flame stabilizing holes 231 are provided on the third sleeve 230. In this way, part of the fuel gas will form a flame stabilizing flame below the crater 111, heat the root of the main flame at the crater 111, and stabilize the main flame.

[0037] In order to align the flame stabilizing flame with the main flame and better heat the root of the main flame, in some embodiments of the present invention, the flame stabilizing holes 231 are arranged to tilt upward from inside to outside.

[0038] The preferred embodiments of the present invention are specifically described above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A combined center fire cover, characterized in that: The fire extinguisher of the present invention comprises an upper fire cover and a lower fire cover, wherein the upper fire cover comprises a top cover, and the lower fire cover comprises an annular bottom cover, wherein a first sleeve, a second sleeve and a third sleeve are arranged between the top cover and the bottom cover, the first sleeve, the second sleeve and the third sleeve are all arranged vertically, the second sleeve is sleeved on the outside of the first sleeve, and the third sleeve is sleeved on the outside of the second sleeve, the bottom of the first sleeve and the bottom of the third sleeve are both fixedly connected to the bottom cover, the top of the second sleeve is fixedly connected to the top cover, a first gap is arranged between the top of the first sleeve and the top cover, and a second gap is arranged between the bottom of the second sleeve and the bottom cover; a support member is arranged between the upper fire cover and the lower fire cover, and the upper fire cover and the lower fire cover are connected by the support member; the top cover has a first outer edge, the first outer edge is arranged above the third sleeve, a plurality of flame-spraying ports are arranged on the first outer edge, and the flame-spraying ports are communicated with the second gap; The bottom surface of the bottom cover is provided with a positioning boss, and the positioning boss is ring-shaped; A third gap is provided between the first outer edge and the third sleeve.

2. The combined center fire cover according to claim 1, characterized in that: The first sleeve, the third sleeve and the bottom cover are integrally formed components, and the second sleeve and the top cover are integrally formed components.

3. The combined center fire cover according to claim 1, characterized in that: The first outer edge is annular and is inclined downward from the inside to the outside.

4. The combined center fire cover according to claim 3, characterized in that: A plurality of notches are provided at the bottom of the first outer edge, the notches being the flame-spraying ports, and the first outer edge protrudes outward from the third sleeve.

5. The combined center fire cover according to claim 1, characterized in that: The support member is arranged in the first gap, the support member is annular, a plurality of first through grooves are arranged on the top of the support member, the first through grooves extend radially along the support member, the bottom of the support member is fixedly connected to the first sleeve, and the top of the support member abuts against the top cover.

6. The combined center fire cover according to claim 5, characterized in that: The bottom surface of the top cover is provided with an annular groove, and the top of the support member is arranged in the annular groove.

7. The combined center fire cover according to claim 1, characterized in that: The third sleeve is provided with a plurality of flame stabilizing holes.

8. The combined center fire cover according to claim 7, characterized in that: The flame stabilizing holes are arranged to be inclined upward from the inside to the outside.

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