Three-ring fire stove head structure and burner using the same

Abstract

The present invention discloses a three-ring burner head structure, comprising an outer ring burner head assembly, a middle ring burner head assembly and an inner ring burner head assembly, wherein the inner ring burner head assembly and the middle ring burner head assembly are nested and concentrically arranged inside and outside, and the centers of the two coincide with the center of the burner head structure, the outer ring burner head assembly is arranged adjacent to the middle ring burner head assembly, and the outer ejector tube of the outer ring burner head assembly and the middle ejector tube of the middle ring burner head assembly are parallel, and the outer ejector tube is connected to the center of the burner head structure; since the outer ejector tube is connected to the center of the burner head structure, it is not necessary to add a turning flow channel between the outer ejector tube and the burner head structure, and the turning flow channel is the part with the largest flow resistance of the burner, which will cause insufficient mixing of gas and air, resulting in yellow flames and excessive CO content in flue gas. In addition, since the outer ring burner head assembly and the middle ring burner head assembly are arranged adjacent to each other, it is easier to clean the outer ring burner head assembly and the middle ring burner head assembly compared with the traditional concentric arrangement.

Description

Technical Field

[0001] The invention relates to the field of burner heads, in particular to a three-ring fire burner head structure and a burner using the same. Background Art

[0002] In the existing three-ring burner head structure, the burner head mixing chamber is usually concentrically distributed, and the ejector tubes are also parallelly distributed.

[0003] This three-ring fire burner head structure has the following disadvantages: since the center of the central ejector tube intersects with the center of the burner head, other outer ring fire ejector tubes and middle ring fire ejector tubes need to add transition sections to connect with the center of the burner head. The setting of the transition section causes the mixture of gas and air to change its flow direction by 90°-180° and enter the head mixing chamber. The flow resistance loss of the turning flow channel of the transition section is large, the primary air coefficient of the burner will be reduced, and incomplete combustion, yellow flames and excessive CO content in the flue gas are prone to occur during gas combustion. Summary of the invention

[0004] The main purpose of the present invention is to provide a three-ring fire burner head structure, which solves the problem of incomplete combustion caused by large flow resistance and insufficient mixing of gas and air after a transition section is added between the outer ring fire ejector tube and the middle ring fire ejector tube of the existing burner head structure and connected to the burner head.

[0005] Another object of the present invention is to provide a burner.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A three-ring burner head structure, comprising an outer ring burner head assembly, a middle ring burner head assembly and an inner ring burner head assembly;

[0008] The inner ring fire burner head assembly and the middle ring fire burner head assembly are nested and concentrically arranged, and the centers of the two coincide with the center of the burner head structure. The outer ring fire burner head assembly is adjacent to the middle ring fire burner head assembly, and the outer ejection tube of the outer ring fire burner head assembly is parallel to the middle ejection tube of the middle ring fire burner head assembly, and the outer ejection tube is connected to the center of the burner head structure.

[0009] Preferably, the outer ring burner head assembly further includes an outer mixing chamber, the center line of the outer ejector tube is perpendicular to the center line of the outer mixing chamber, and the center line of the outer ejector tube and the center line of the outer mixing chamber are located in the same horizontal plane.

[0010] Preferably, the external ejector tube comprises a suction section, a mixing section and a diffuser section which are connected in sequence, and the diffuser section is communicated with the external mixing chamber.

[0011] Preferably, the length of the external ejector tube is 140-160 mm.

[0012] Preferably, the inner ring fire burner head assembly comprises an inner ejector tube and an inner mixing chamber, the center line of the inner ejector tube is perpendicular to the center line of the inner mixing chamber, and the center line of the inner ejector tube and the center line of the inner mixing chamber are located in the same horizontal plane.

[0013] Preferably, the inner ejection tube includes an inner ejection section and an inner suction section, one end of the inner ejection section is connected to the inner suction section, and the other end of the inner ejection section is connected to the inner mixing chamber.

[0014] Preferably, an angle is set between the inner ejector tube and the middle ejector tube.

[0015] Preferably, the outer mixing chamber is located at the left front side or the right front side of the center of the furnace head structure.

[0016] Preferably, the distance between the center line of the outer ejector tube and the center of the furnace head structure is 30-50 mm.

[0017] A burner comprises the above-mentioned three-ring fire burner head structure, a flame divider, an outer fire cover and an inner fire cover, wherein the flame divider is located on the three-ring fire burner head structure, and the outer fire cover is nested in the outer periphery of the inner fire cover and both are arranged on the flame divider.

[0018] After adopting the above technical solution, since the outer ejector tube is connected to the center of the burner structure, there is no need to add a turning flow channel between the outer ejector tube and the burner structure, because the turning flow channel is the part with the largest flow resistance of the burner, which will lead to insufficient mixing of gas and air, yellow flames, and excessive CO content in flue gas. In addition, in the present invention, since the outer ring burner head assembly and the middle ring burner head assembly are arranged adjacent to each other, it makes it easier to clean the outer ring burner head assembly and the middle ring burner head assembly compared to the traditional concentric arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the three-ring burner head structure provided by Example 1 of the present invention;

[0020] Figure 2 yes Figure 1 Cross-section along the BB direction;

[0021] Figure 3 yes Figure 1 Cross-section along the mid-DD direction;

[0022] Figure 4 yes Figure 1 Cross-section along the EE direction;

[0023] Figure 5 is a schematic structural diagram of a three-ring fire burner head structure provided in Example 1 of the present invention;

[0024] Figure 6is an exploded diagram of a burner provided in Example 2 of the present invention;

[0025] Figure 7 is a front view of a burner provided in Example 2 of the present invention;

[0026] Figure 8 yes Figure 7 Cross-section along the mid-DD direction;

[0027] Fig. 9 yes Figure 7 Cross-section along the EE direction;

[0028] Fig.10 yes Figure 7 Cross-sectional view along the FF direction.

[0029] in:

[0030] 1. Outer ring burner head assembly, 2. Middle ring burner head assembly, 3. Inner ring burner head assembly, 4. Three-ring burner head structure, 5. Fire distributor, 6. Outer fire cover, 7. Inner fire cover, 11. Outer ejector tube, 12. Outer mixing chamber; 21. Middle ejector tube, 22. Middle mixing chamber, 31. Inner ejector tube, 32. Inner mixing chamber, 111. Suction section, 112. Mixing section, 113. Diffuser section, 311. Inner ejector section, 312. Inner suction section. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] In the description of the present invention, it should be clarified that terms such as "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", and "horizontal" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing the present invention. They do not mean that the devices or elements referred to must have a specific direction or position, and therefore cannot be understood as limitations on the present invention.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example 1

[0035] Embodiment 1 of the present invention provides a three-ring burner head structure, such as Figures 1 to 5 As shown, it includes an outer ring fire burner head assembly 1, a middle ring fire burner head assembly 2 and an inner ring fire burner head assembly 3, the inner ring fire burner head assembly 3 and the middle ring fire burner head assembly 2 are nested and concentrically arranged inside and outside, and the centers of the two coincide with the center of the burner head structure, the outer ring fire burner head assembly 1 and the middle ring fire burner head assembly 2 are adjacently arranged, and the outer ejector tube 11 of the outer ring fire burner head assembly 1 and the middle ejector tube 21 of the middle ring fire burner head assembly 2 are parallel, and the outer ejector tube 11 is connected to the center of the burner head structure;

[0036] In this way, by adopting the above structure, since the external ejector tube 11 is connected to the center of the burner head structure, there is no need to add a turning flow channel between the external ejector tube 11 and the burner head structure. Because the turning flow channel is the part with the largest flow resistance of the burner, it will lead to insufficient mixing of gas and air, resulting in yellow flames and excessive CO content in the flue gas.

[0037] Furthermore, in the present embodiment, since the outer ring fire burner head assembly 1 and the middle ring fire burner head assembly 2 are arranged adjacent to each other, it makes it easier to clean the outer ring fire burner head assembly 1 and the middle ring fire burner head assembly 2 compared to the traditional concentric arrangement.

[0038] In a specific embodiment:

[0039] The outer ring burner head assembly 1 further includes an outer mixing chamber 12, the center line of the outer ejector tube 11 is perpendicular to the center line of the outer mixing chamber 12, and the center line of the outer ejector tube 11 and the center line of the outer mixing chamber 12 are located in the same horizontal plane;

[0040] Thus, with the above structure, since the center line of the outer ejector tube 11 is perpendicular to the center line of the outer mixing chamber 12, the mixed gas of the fuel gas and the air flows out of the outer ejector tube 11 and directly enters the outer mixing chamber 12 for re-mixing, so that the mixing is more uniform.

[0041] Furthermore, since the center line of the external ejector tube 11 and the center line of the external mixing chamber 12 are located in the same horizontal plane, there is no need to add additional connecting pipes, which reduces the resistance to the flow of the mixed gas of air and fuel gas, helps to improve the primary air coefficient, thereby making the combustion more complete.

[0042] The external ejector tube 11 includes a suction section 111, a mixing section 112 and a diffuser section 113 connected in sequence, and the diffuser section 113 is connected to the external mixing chamber 12;

[0043] In this way, the diffuser section 113 of the external ejector tube 11 is connected to the external mixing chamber 12, and the mixed gas of the fuel gas and the air directly enters the external mixing chamber 12 after coming out of the diffuser section 113 to be further mixed evenly;

[0044] Moreover, in this embodiment, in order to further increase the outlet pressure of the diffuser section 113 and solve the problems of limited length of the injector tube of the existing high-power burner burner head, low outlet pressure of the diffuser section, insufficient mixing of gas and air, resulting in yellow flame, flashback and excessive CO content in the flue gas, the length of the external injector tube 11 in this embodiment is between 140-160mm.

[0045] In another embodiment:

[0046] The inner ring burner head assembly 3 includes an inner ejector tube 31 and an inner mixing chamber 32, wherein the center line of the inner ejector tube 31 is perpendicular to the center line of the inner mixing chamber 32, and the center line of the inner ejector tube 31 and the center line of the inner mixing chamber 32 are located in the same horizontal plane;

[0047] Thus, with the above structure, since the center line of the inner ejector tube 31 is perpendicular to the center line of the inner mixing chamber 32, the mixed gas of the fuel gas and the air flows out of the inner ejector tube 31 and directly enters the inner mixing chamber 32 for re-mixing, so that the mixing is more uniform.

[0048] Furthermore, since the center line of the inner ejector tube 31 and the center line of the inner mixing chamber 32 are located in the same horizontal plane, there is no need to add additional connecting pipes, which reduces the resistance to the flow of the mixed gas of air and fuel gas, helps to improve the primary air coefficient, thereby making the combustion more complete.

[0049] The inner ejection tube 31 includes an inner ejection section 311 and an inner suction section 312. One end of the inner ejection section 311 is connected to the inner suction section 312, and the other end of the inner ejection section 311 is connected to the inner mixing chamber 32.

[0050] In this way, the inner ejection section 311 of the inner ejection tube 31 is connected with the inner mixing chamber 32, and the mixed gas of the fuel gas and the air directly enters the inner mixing chamber 32 after coming out of the inner ejection section 311 to be further mixed evenly.

[0051] In one embodiment:

[0052] An angle is set between the inner ejection tube 31 and the middle ejection tube 21, and the angle is preferably 40-80°. Figure 1 The angle α in the figure can avoid mutual interference between the air.

[0053] The outer mixing chamber 12 is located at the left front side or the right front side of the center of the burner structure, which is beneficial to the supplement of secondary air for the outer ring fire and the middle ring fire.

[0054] The distance between the center line of the outer ejector tube 11 and the center of the furnace head structure is 30-50 mm. Figure 1 L1 in

[0055] The distance is matched according to the furnace head structure and the volume of the burner.

[0056] The three-ring burner head structure provided in this embodiment has the following beneficial effects:

[0057] First, the center of the outer ring burner head assembly is not concentric with the center of the middle ring burner head assembly and the inner ring burner head assembly, and the outer ejector tube and the middle ejector tube are arranged in parallel, the center of the outer mixing chamber is located in the left front or right front of the center of the burner structure, and the center of the outer ejector tube intersects with the center of the burner structure; this reduces the flow resistance after the gas and air are mixed, and there is no need to add a turning flow channel between the outer ejector tube and the burner structure, because the turning flow channel is the part with the largest flow resistance of the burner, which will cause insufficient mixing of the gas and air;

[0058] Secondly, the length of the external ejector tube is correspondingly lengthened to reduce energy loss and increase the outlet pressure of the expansion section, so as to solve the problems of yellow flame, flashback and excessive CO content in flue gas caused by the limited length of the ejector tube of the existing large-power burner head, low outlet pressure of the expansion section, insufficient mixing of gas and air;

[0059] In addition, the center of the inner mixing chamber coincides with the center of the middle mixing chamber, the inner ejector tube and the middle ejector tube are arranged at an angle, and the inner ejector tube intersects with the center of the burner structure, thereby reducing the transition turning section and the energy loss caused by the change in the flow direction of gas and air. The center small fire burns stably without flameout or yellow flame phenomenon.

[0060] Example 2

[0061] Embodiment 2 of the present invention provides a burner, such as Figures 6 to 10 As shown, it includes the three-ring fire burner head structure 4, the fire divider 5, the outer fire cover 6 and the inner fire cover 7 described in Example 1, the fire divider 5 is located on the three-ring fire burner head structure 4, the outer fire cover 6 is nested on the outer periphery of the inner fire cover 7 and both are arranged on the fire divider 5;

[0062] Thus, the flow sequence of the secondary air in this embodiment is as follows: the secondary air enters from the bottom of the ignition distributor 5, enters the inner circle of the ignition distributor 5 under the action of negative pressure, and then participates in the combustion of the inner circle fire of the outer fire cover 6 and the inner fire cover 7 of the burner, as shown in FIG. Figure 8 Indicated by the arrow.

[0063] After the burner head in Example 1 is applied to the burner, since the outer ejector tube is connected to the center of the burner head structure, there is no need to add a turning flow channel between the outer ejector tube and the burner head structure. The turning flow channel is the part with the largest flow resistance of the burner, which will lead to insufficient mixing of gas and air, and the occurrence of yellow flames and excessive CO content in the flue gas. In addition, since the outer ring fire burner head assembly and the middle ring fire burner head assembly are adjacent to each other, it makes it easier to clean the outer ring fire burner head assembly and the middle ring fire burner head assembly compared to the traditional concentric arrangement. This structure makes the combustion of the burner more complete.

[0064] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A three-ring stove head structure, It is characterized in that It comprises an outer ring burner head assembly (1), a middle ring burner head assembly (2) and an inner ring burner head assembly (3); The inner ring fire burner head assembly (3) and the middle ring fire burner head assembly (2) are nested and concentrically arranged, and the centers of the two coincide with the center of the burner head structure; the outer ring fire burner head assembly (1) and the middle ring fire burner head assembly (2) are arranged adjacent to each other, and the outer ejector tube (11) of the outer ring fire burner head assembly (1) and the middle ejector tube (21) of the middle ring fire burner head assembly (2) are parallel, and the outer ejector tube (11) is connected to the center of the burner head structure; the outer ring fire burner head assembly (1) also includes an outer mixing chamber (1 2), the center line of the external ejector tube (11) is perpendicular to the center line of the external mixing chamber (12), and the center line of the external ejector tube (11) and the center line of the external mixing chamber (12) are located in the same horizontal plane; the external ejector tube (11) comprises an intake section (111), a mixing section (112) and a diffuser section (113) connected in sequence, and the diffuser section (113) is connected to the external mixing chamber (12); and the external mixing chamber (12) is located on the left front side or the right front side of the center of the burner head structure.

2. The three-ring burner head structure according to claim 1, It is characterized in that The length of the external ejector tube (11) is 140-160 mm.

3. The three-ring burner head structure according to claim 1 or 2, It is characterized in that The inner ring fire burner head assembly (3) comprises an inner ejector tube (31) and an inner mixing chamber (32), wherein the center line of the inner ejector tube (31) is perpendicular to the center line of the inner mixing chamber (32), and the center line of the inner ejector tube (31) and the center line of the inner mixing chamber (32) are located in the same horizontal plane.

4. The three-ring burner head structure according to claim 3, It is characterized in that The inner ejection tube (31) comprises an inner ejection section (311) and an inner suction section (312); one end of the inner ejection section (311) is connected to the inner suction section (312), and the other end of the inner ejection section (311) is connected to the inner mixing chamber (32).

5. The three-ring burner head structure according to claim 4, It is characterized in that An included angle is provided between the inner ejector tube (31) and the middle ejector tube (21).

6. The three-ring burner head structure according to claim 1, It is characterized in that The distance between the center line of the external ejector tube (11) and the center of the furnace head structure is 30-50 mm.

7. A burner, It is characterized in that It comprises the three-ring fire stove head structure (4) as claimed in any one of claims 1 to 6, a fire divider (5), an outer fire cover (6) and an inner fire cover (7), wherein the fire divider (5) is located on the three-ring fire stove head structure (4), and the outer fire cover (6) is nested on the outer periphery of the inner fire cover (7) and both are arranged on the fire divider (5).

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