Anti-backfire burner

Abstract

The utility model relates to the technical field of combustors, in particular to an anti-backfire combustor. The anti-backfire combustor comprises a furnace end base, a fire cover and an injection pipe, a combustion cavity is formed in the furnace end base, the bottom of the fire cover is connected with a barrel-shaped metal wire mesh, the combustion cavity is divided into an inner cavity and an outer cavity through the wire mesh, the inner cavity is communicated with a fire outlet hole of the fire cover, and the outer cavity is communicated with the injection pipe. The silk screen can prevent backfire in the inner cavity from directly entering the injection pipes, meanwhile, the double injection pipes are arranged to increase the air inlet amount, and the partition plate is arranged in the outer cavity to separate air inlet flow channels of the two injection pipes. The anti-backfire combustor is large in combustion firepower and high in safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to burner technical field, especially a kind of anti-backfire burner. BACKGROUND

[0002] Natural gas is burned in furnace head, flame is retracted into gas pipe through fire hole, which is called backfire, backfire has the risk of noise, damage gas pipe, even explosion accident, which is a safety problem that needs high attention.

[0003] For example, the Chinese invention patent with the announcement number CN109307267A discloses a burner fire cover, low flame burner and gas stove, and the fire cover is provided with a fire hole on its upper surface. The low flame burner includes a converging ring pot rack and a burner body, the converging ring pot rack is arranged on the periphery of the burner body, the burner body includes a furnace head and a combustion-supporting fire cover, the combustion-supporting fire cover is installed above the furnace head, and a straight-jet fire hole is arranged on the combustion-supporting fire cover. The problem is that the straight-jet flame is connected to the injection pipe, and no anti-backfire device is arranged, which has safety risks.

[0004] For example, the Chinese utility model patent with the announcement number CN221483611U discloses a burner with anti-backfire function, which includes a burner furnace head seat, a blocking mechanism, a buffer mechanism and an injection pipe. The blocking mechanism further includes a fixed plate, the upper surface of the fixed plate is uniformly connected with three springs, the top end of the spring is fixedly connected with a circular baffle, the buffer mechanism is used for preliminarily blocking the backfire flame, and then the blocking mechanism is used for blocking the backfire flame, so as to separate the flame from the burning gas.

[0005] The existing technology has the following problems: the baffle used to realize the anti-backfire function has a great influence on the air inlet of the burner, which reduces the combustion efficiency and makes the large fire effect unsatisfactory. Therefore, the existing technology needs to be improved. UTILITY MODEL CONTENT

[0006] To solve the above technical problems, the purpose of the utility model is to provide a burner with good combustion effect and anti-backfire function.

[0007] The utility model discloses the technical scheme adopted to solve the problem is as follows: an anti-backfire burner, including furnace head seat, fire cover and injection pipe, the furnace head seat is equipped with combustion chamber, the injection pipe is connected to the outside of furnace head seat, the injection pipe is communicated with combustion chamber, the fire cover is installed in the top opening of combustion chamber;

[0008] The combustion cavity is provided with a wire mesh, the wire mesh is in a cylindrical shape, the upper end of the wire mesh abuts against the outer edge of the fire cover, the lower end of the wire mesh abuts against the bottom surface of the burner head base, the wire mesh divides the combustion cavity into an inner cavity and an outer cavity, a plurality of through holes are arranged on the outer wall of the wire mesh, and the through holes communicate the inner cavity and the outer cavity.

[0009] As a further improvement of the above technical solution, the wire mesh is made of high-temperature-resistant metal material, and the wire mesh is fixedly connected with the fire cover.

[0010] As a further improvement of the above technical solution, the fire cover is provided with a plurality of fire outlet holes arranged in an annular array, and the fire outlet holes communicate with the inner cavity.

[0011] As a further improvement of the above technical solution, the outer cavity is annular, and two baffles are arranged in the outer cavity, the two baffles are vertically arranged between the inner wall of the combustion cavity and the outer wall of the wire mesh, and the two baffles divide the outer cavity into a left half cavity and a right half cavity.

[0012] As a further improvement of the above technical solution, the number of the ejector pipes is two, and the two ejector pipes respectively communicate with the left half cavity and the right half cavity.

[0013] As a further improvement of the above technical solution, the combustion cavity is provided with a mounting column, and the fire cover is sleeved with the mounting column.

[0014] The bottom of the mounting column is provided with an air inlet hole, the mounting column is provided with an ignition device, and the ignition needle of the ignition device is located above the fire outlet hole.

[0015] The beneficial effects of the present application are as follows: the wire mesh with through holes is arranged to divide the combustion cavity into an inner cavity and an outer cavity, which are respectively used for combustion and natural gas flow, the wire mesh can block the direct entry of backfire occurring in the inner cavity into the ejector pipe, thereby avoiding danger; at the same time, in order to improve the air intake and combustion efficiency, double ejector pipes are arranged to increase the air intake, and baffles are arranged in the outer cavity to separate the air inlet channels of the two ejector pipes, thereby avoiding the two ejector pipes from being affected at the same time when backfire occurs, and further improving the safety. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further explained and described in connection with the accompanying drawings and specific embodiments.

[0017] Figure 1 The present application is a structural schematic diagram;

[0018] Figure 2 The present application is an explosion schematic diagram;

[0019] Figure 3 The present application is a structural schematic diagram of the fire cover and the wire mesh;

[0020] Figure 4 isFigure 1 A-A direction cross-sectional structure schematic view of figure

[0021] Figure 5 B-B direction cross-sectional structure schematic view of figure Figure 1 B-B direction cross-sectional structure schematic view of figure

[0022] In the figure: 1 - furnace head base, 11 - combustion chamber, 111 - inner cavity, 112 - outer cavity, 1121 - left half cavity, 1122 - right half cavity, 12 - partition plate, 13 - mounting column, 131 - air inlet hole, 2 - fire cover, 21 - fire outlet hole, 3 - wire mesh, 31 - through hole, 4 - ejector pipe, 5 - ignition device. DETAILED DESCRIPTION

[0023] This part will describe the specific embodiments of the utility model in detail, the preferred embodiment of the utility model is shown in the drawings, the role of the drawings is to supplement the description of the written part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore it cannot be understood as a limitation on the utility model.

[0025] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than and the like are not included in the number, above, below, within and the like are understood as including the number.If it is described to the first, the second is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0026] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0027] Referring to Figures 1 to 4 A backfire burner, comprising a furnace head base 1, a fire cover 2 and an ejector pipe 4, the furnace head base 1 is provided with a combustion chamber 11, the ejector pipe 4 is connected to the outer side of the furnace head base 1, the ejector pipe 4 is communicated with the combustion chamber 11, and the fire cover 2 is installed at the top opening of the combustion chamber 11.

[0028] Preferably, the combustion cavity 11 is provided with a wire mesh 3, the wire mesh 3 is cylindrical, the upper end of the wire mesh 3 abuts the outer edge of the fire cover 2, the lower end of the wire mesh 3 abuts the bottom surface of the burner base 1, the wire mesh 3 divides the combustion cavity 11 into an inner cavity 111 and an outer cavity 112, a plurality of through holes 31 are arranged on the outer wall of the wire mesh 3, and the through holes 31 communicate the inner cavity 111 and the outer cavity 112. The dense through holes 31 on the wire mesh 3 can not only allow the gas to pass through, but also block the backfire from entering the ejector pipe 4 from the combustion cavity 11, thereby avoiding the risk.

[0029] Preferably, the wire mesh 3 is made of high-temperature-resistant metal material, and the wire mesh 3 is fixedly connected with the fire cover 2. The wire mesh 3 can be made of 316 stainless steel, iron-chromium-aluminum or the like, and the wire mesh 3 and the fire cover 2 can be fixed by welding, screwing or the like, so that the structure is stable and not easy to be damaged.

[0030] The fire cover 2 is provided with annularly arranged fire outlet holes 21, and the fire outlet holes 21 communicate with the inner cavity 111.

[0031] Preferably, the outer cavity 112 is annular, two baffles 12 are arranged in the outer cavity 112, the two baffles 12 are vertically arranged between the inner wall of the combustion cavity 11 and the outer wall of the wire mesh 3, and the two baffles 12 divide the outer cavity 112 into a left half cavity 1121 and a right half cavity 1122.

[0032] Referring to Figure 2 and Figure 5 Preferably, the number of the ejector pipes 4 is two, and the two ejector pipes 4 respectively communicate with the left half cavity 1121 and the right half cavity 1122. The ejector pipes 4 are connected to the side wall of the burner base 1, and the gas input into the two ejector pipes 4 is not communicated in the outer cavity 112, and is combined after entering the inner cavity 111 through the through holes 31. This arrangement can avoid that the backfire occurring on one side of the outer cavity 112 flows to the other side, thereby further improving the safety.

[0033] The combustion cavity 11 is provided with a mounting column 13, the fire cover 2 is sleeved with the mounting column 13, the bottom of the mounting column 13 is provided with an air inlet hole 131, the mounting column 13 is provided with an ignition device 5, and the ignition needle of the ignition device 5 is located above the fire outlet hole 21. The through hole in the center of the fire cover 2 is sleeved into the mounting column 13, so that the fire cover 2 and the burner base 1 are fixed with each other, the air inlet hole 131 is arranged, the air circulation is increased, the gas combustion is more sufficient, and the combustion efficiency is improved.

[0034] The above is only a preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation, direct or indirect application in other related technical fields under the utility model concept of the utility model is included in the patent protection range of the utility model.

Claims

1. A backfire-proof burner, comprising a burner head base (1), a fire cover (2) and an injection pipe (4), the burner head base (1) is provided with a combustion cavity (11) inside, the injection pipe (4) is connected to the outside of the burner head base (1), the injection pipe (4) is communicated with the combustion cavity (11), and the fire cover (2) is installed at the top opening of the combustion cavity (11), characterized in that: the combustion cavity (11) is provided with a wire mesh (3), the wire mesh (3) is cylindrical, the upper end of the wire mesh (3) abuts against the outer edge of the fire cover (2), the lower end of the wire mesh (3) abuts against the bottom surface of the burner head base (1), the wire mesh (3) divides the combustion cavity (11) into an inner cavity (111) and an outer cavity (112), and a plurality of through holes (31) are arranged on the outer wall of the wire mesh (3), and the through holes (31) communicate the inner cavity (111) and the outer cavity (112).

2. The backfire-proof burner according to claim 1, characterized in that: the wire mesh (3) is made of high-temperature-resistant metal material, and the wire mesh (3) is fixedly connected with the fire cover (2).

3. The backfire-proof burner according to claim 1, characterized in that: the fire cover (2) is provided with annularly arranged fire outlet holes (21), and the fire outlet holes (21) are communicated with the inner cavity (111).

4. The backfire-proof burner according to claim 1, characterized in that: the outer cavity (112) is annular, two baffles (12) are arranged in the outer cavity (112), the two baffles (12) are vertically arranged between the inner wall of the combustion cavity (11) and the outer wall of the wire mesh (3), and the two baffles (12) divide the outer cavity (112) into a left half cavity (1121) and a right half cavity (1122).

5. The backfire-proof burner according to claim 4, characterized in that: the number of the injection pipes (4) is two, and the two injection pipes (4) are communicated with the left half cavity (1121) and the right half cavity (1122) respectively.

6. The backfire-proof burner according to claim 1, characterized in that: the combustion cavity (11) is provided with a mounting column (13), the fire cover (2) is sleeved with the mounting column (13); the bottom of the mounting column (13) is provided with an air inlet hole (131), the mounting column (13) is provided with an ignition device (5) inside, and the ignition needle of the ignition device (5) is located above the fire outlet hole (21). ​ ​ ​ ​ ​ ​ ​

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