Combustor for inhibiting flame tempering

Abstract

A combustor capable of restraining flame tempering comprises a nozzle, a nozzle seat, an injection pipe, a seat plate, a net-shaped mixing cavity with a lower opening, a base and a fire cover, the base is hollow and provided with an upper opening and comprises a counter bore, an air inlet connecting hole and an annular combustion plate, the counter bore protrudes outwards, and a lower half combustion hole is formed in the annular combustion plate; the fire cover is hollow and is provided with a lower opening, an annular cover plate is arranged on the lower opening, and upper half combustion holes are formed in the annular cover plate; the fire cover and the base are buckled, the annular cover plate and the annular combustion plate are fixed, and the upper half combustion hole and the lower half combustion hole form a combustion hole; the net-shaped mixing cavity is formed in the counter bore, and the net-shaped mixing cavity and the fire cover top plate are attached to form an annular gas supply cavity; the upper end of the injection pipe is fixed with the mounting hole; the nozzle is mounted on the mounting hole; the axial plate is fixed with the lower end of the injection pipe; and the injection pipe is fixed with the seat plate. Fuel gas and air are mixed through the net-shaped mixing cavity and then flow all around, the fuel gas and air mixed gas is evenly distributed, and combustion is sufficient. And the netlike mixing cavity is arranged to effectively prevent backfire.

Description

Technical Field

[0001] This utility model relates to a gas heater, and more particularly to a burner for a gas heater. Background Technology

[0002] The existing technology, Chinese patent 202420456168.2, describes a double-layer combustion mesh burner, including a venturi tube, a cylindrical gas cylinder, a top cover, a bottom cover, an inner combustion mesh, and an outer combustion mesh. The cylindrical gas cylinder includes a main annular protrusion and a secondary annular protrusion located at the top and bottom, respectively. The space between the main annular protrusion, the secondary annular protrusion, and the secondary annular protrusion forms a gas distribution chamber and has an outlet. The bottom cover has a cylindrical air inlet at its center. The top cover and bottom cover are respectively embedded in the upper and lower ends of the cylindrical gas cylinder. The inner combustion mesh is fitted onto the cylindrical gas cylinder and covers the gas distribution chamber. The outer combustion mesh is fitted and fixed to the inner combustion mesh. The cylindrical air inlet is inserted into the lower end of the venturi tube. There is a gap between the upper end of the venturi tube and the top cover, allowing the gas-air mixture to move downwards. The problem is that the gas-air mixture is unevenly distributed within the inner combustion mesh, resulting in incomplete combustion and a tendency for backfire. Utility Model Content

[0003] The purpose of this invention is to provide a burner that suppresses flame backfire, which features a well-distributed mixture of fuel gas and air, complete combustion, and protection against backfire.

[0004] This invention is achieved as follows: a burner for suppressing flame backfire, characterized in that it includes a nozzle, a nozzle seat, an ejector tube, a seat plate, a mesh mixing chamber with a lower opening, a base, and a flame cap.

[0005] The nozzle seat includes a circular seat plate and two axial plates, and the circular seat plate is provided with mounting holes;

[0006] The lower part of the ejector tube is provided with several air ejection holes;

[0007] The base is hollow and has an upper opening, including a countersunk hole, an air inlet connection hole and an annular combustion plate. The countersunk hole protrudes outward and the annular combustion plate has a lower half combustion hole.

[0008] The flame cap is hollow and has a lower opening. An annular cover plate is provided on the lower opening, and an upper combustion hole is provided on the annular cover plate.

[0009] The burner cap and base are fastened together, the annular cover plate and the annular combustion plate are fixed together, and the upper half combustion hole and the lower half combustion hole constitute the combustion hole; the mesh mixing chamber is set in the countersunk hole, and the mesh mixing chamber and the burner cap top plate are fitted together to form the annular gas supply chamber; the upper end of the ejector tube is fixed to the mounting hole; the nozzle is installed on the mounting hole; the axial plate is fixed to the lower end of the ejector tube; the ejector tube is fixed to the base plate.

[0010] The burner for suppressing flame backfire is characterized in that the volume of the combustion hole gradually increases from the radial inner side to the radial outer side.

[0011] The burner described above for suppressing flame backfire is characterized by having a rhomboid combustion hole.

[0012] The burner for suppressing flame backfire is characterized in that the mesh mixing chamber has a spherical curved surface.

[0013] The burner for suppressing flame backfire is characterized in that: the top plate of the burner cap is provided with a slow-flow cavity with an upper and lower opening, and the slow-flow cavity is opposite to the countersunk hole.

[0014] The burner for suppressing flame backfire is characterized in that: the upper part of the ejector tube is provided with a hollow annular protrusion with an inner opening;

[0015] The upper end of the ejector tube passes through the air inlet connection hole, and the annular protrusion supports the bottom plate of the countersunk hole; the outward flange at the upper end of the ejector tube fits into the bottom plate of the countersunk hole.

[0016] This invention relates to a burner for suppressing flame backfire. Gas and air are mixed in a mesh mixing chamber and then flow outwards, resulting in a uniform distribution of the gas-air mixture and complete combustion. The mesh mixing chamber effectively prevents backfire. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the present invention.

[0018] Figure 2 This is a partial front view of the present invention.

[0019] Figure 3 This is one of the exploded perspective views of this utility model.

[0020] Figure 4 This is the second exploded perspective view of this utility model.

[0021] Figure 5 This is a perspective view of the present invention. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] like Figure 1 , Figure 3 As shown, a burner for suppressing flame backfire includes a nozzle 1, a nozzle seat 2, an ejector tube 3, a seat plate 4, a mesh mixing chamber with a lower opening 5, a base 6, and a flame cap 7.

[0025] Nozzle seat 2 includes a circular seat plate 21 and two axial plates 22. The circular seat plate 21 is provided with mounting holes.

[0026] The lower part of the ejector tube 3 is provided with several air ejection holes 31;

[0027] The base 6 is hollow and has an upper opening, including a countersunk hole 61, an air inlet connection hole 62 and an annular combustion plate 63. The countersunk hole 61 protrudes outward, and the annular combustion plate 63 is provided with a lower half combustion hole 631.

[0028] The burner cap 7 is hollow and has a lower opening. An annular cover plate 71 is provided on the lower opening. An upper combustion hole 711 is provided on the annular cover plate 71.

[0029] The burner cap 7 and base 6 are fastened together, and the annular cover plate 71 and annular combustion plate 63 are fixed. The upper combustion hole 711 and the lower combustion hole 631 constitute the combustion hole 8. The mesh mixing chamber 5 is located in the countersunk hole 61, and the mesh mixing chamber 5 and the top plate of the burner cap 7 are attached to form an annular gas supply chamber. The upper end of the ejector tube 3 is fixed to the mounting hole on the circular base plate 21. The nozzle 1 is installed on the mounting hole. The axial plate 22 is fixed to the lower end of the ejector tube 3. The ejector tube 3 is fixed to the base plate 4, and the air ejector hole 31 is located on the ejector tube 3 at the lower part of the base plate 4. The combined effect of the annular gas supply chamber and the mesh mixing chamber 5 achieves backfire prevention.

[0030] The ejector tube 3 has a hollow annular protrusion 32 with an inner opening at the top;

[0031] The upper end of the ejector tube 3 passes through the air inlet connection hole 62, and the annular protrusion 32 supports the bottom plate of the countersunk hole 61; the outer flange 33 at the upper end of the ejector tube 3 is in contact with the bottom plate of the countersunk hole 61.

[0032] The base and flame cover are made of stamped metal sheet, such as stainless steel sheet.

[0033] As a further improvement of this utility model, the volume of the combustion hole 8 gradually increases from the radial inner side to the radial outer side. With this structure, the gas and air mixture is pressurized at the air inlet and then diffuses in the combustion hole 8, ensuring sufficient combustion, preventing carbon buildup in the combustion hole, and preventing backfire.

[0034] The combustion hole 8 is rhomboid in shape.

[0035] As a further improvement of this utility model, the mesh mixing cavity 5 has a spherical curved surface.

[0036] As a further improvement of this utility model: the top plate of the fire cover 7 is provided with a slow flow cavity 72 with an opening at the top and bottom, and the slow flow cavity 72 is opposite to the countersunk hole 61.

[0037] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A burner for suppressing flame backfire, characterized in that: Includes a nozzle, nozzle seat, ejector tube, seat plate, lower-opening mesh mixing chamber, base, and flame cap. The nozzle seat includes a circular seat plate and two axial plates, and the circular seat plate is provided with mounting holes; The lower part of the ejector tube is provided with several air ejection holes; The base is hollow and has an upper opening, including a countersunk hole, an air inlet connection hole and an annular combustion plate. The countersunk hole protrudes outward and the annular combustion plate has a lower half combustion hole. The flame cap is hollow and has a lower opening. An annular cover plate is provided on the lower opening, and an upper combustion hole is provided on the annular cover plate. The burner cap and base are fastened together, the annular cover plate and the annular combustion plate are fixed together, and the upper half combustion hole and the lower half combustion hole constitute the combustion hole; the mesh mixing chamber is set in the countersunk hole, and the mesh mixing chamber and the burner cap top plate are fitted together to form the annular gas supply chamber; the upper end of the ejector tube is fixed to the mounting hole; the nozzle is installed on the mounting hole; the axial plate is fixed to the lower end of the ejector tube; the ejector tube is fixed to the base plate.

2. The burner for suppressing flame backfire according to claim 1, characterized in that: The volume of the combustion hole gradually increases from the radial inner side to the radial outer side.

3. A burner for suppressing flame backfire according to claim 2, characterized in that: The combustion holes are diamond-shaped.

4. A burner for suppressing flame backfire according to claim 1, characterized in that: The mesh mixing cavity has a spherical curved surface.

5. A burner for suppressing flame backfire according to claim 1, characterized in that: The top plate of the fire cap is provided with a slow-flow cavity with an opening at the bottom, and the slow-flow cavity is opposite to the countersunk hole.

6. A burner for suppressing flame backfire according to claim 1, characterized in that: The base and the flame cap are made of stamped metal sheet.

7. A burner for suppressing flame backfire according to claim 1, 2, 3, 4, 5 or 6, characterized in that: The upper part of the ejector tube is provided with a hollow annular protrusion with an inner opening; The upper end of the ejector tube passes through the air inlet connection hole, and the annular protrusion supports the bottom plate of the countersunk hole; the outward flange at the upper end of the ejector tube fits into the bottom plate of the countersunk hole.

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