Energy-saving burner with multi-stage airflow mixing structure

Abstract

The utility model discloses an energy-saving burner with a multi-stage airflow mixing structure, which belongs to the technical field of burners and comprises a gas main pipe, a connecting base communicated with the gas main pipe and a burning head sleeve mounted on the outer side of the connecting base. A gas branch pipe is installed on the connecting base, a gas small hole is formed in the top end of the gas branch pipe, an internal thread is arranged on the inner wall of the gas branch pipe, an ignition hole is formed in the middle of the connecting base, a combustion-supporting pipe is arranged on the outer side of the gas branch pipe in a sleeving mode, and the bottom end of the combustion-supporting pipe is fixedly connected with the connecting base. Small combustion-supporting holes are formed in the side wall of the combustion-supporting pipe in an array mode, so that the problems of scale deposition and rusting in the fuel gas branch pipe can be prevented, pipeline blockage is effectively prevented, meanwhile, the flame jetting range is increased, mixing of fuel and air is promoted in the first-stage combustion area, and sufficient combustion of the fuel can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and more specifically, to an energy-saving burner with a multi-stage airflow mixing structure. Background Technology

[0002] A burner is a device that mixes fuel and air in a specific ratio and ignites it to generate heat energy. It is widely used in boilers, industrial furnaces, heat treatment and other fields. Its core function is to achieve efficient combustion and heat energy conversion.

[0003] Patent authorization number CN209026820U discloses a multi-stage energy-saving burner, including a combustion head and a combustion mixing mechanism, with the combustion mixing mechanism located in the combustion head. The combustion mixing mechanism includes a gas pipe base, a combustion mixing pipe, and a helical toothed disc. The combustion mixing pipe is located on the gas pipe base and has combustion-supporting holes on its side. The helical toothed disc is located at the top of the combustion mixing pipe. The gas pipe base also has two or more small gas pipes, with small gas holes on their sides. There is a height difference between the different small gas pipes. Under the impact of multiple spiral gas streams, the gas and combustion-supporting air mix rapidly, forming a recirculation zone in the primary combustion zone, increasing the residence time of the combustible mixture, which is beneficial to improving the completeness of combustion.

[0004] However, the gas pipe with patent number CN209026820U has multiple gas holes on its outer wall, which are prone to scaling and blockage during long-term use, affecting the pipe's smoothness and heat exchange efficiency. Moreover, the multiple holes can affect fluid flow and, to some extent, the flame jet distance. Furthermore, when combustible gas mixes with air in the primary combustion zone, the mixing effect with air is not ideal due to constant gas pressure, resulting in incomplete fuel combustion. Therefore, we propose an energy-saving burner with a multi-stage airflow mixing structure to solve the above-mentioned problems. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of this utility model is to provide an energy-saving burner with a multi-stage airflow mixing structure, which can prevent the accumulation of scale and rust inside the gas branch pipe, thereby effectively preventing pipe blockage, while increasing the range of flame injection, and promoting the mixing between fuel and air in the primary combustion zone, which can ensure complete combustion of fuel.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] An energy-saving burner with a multi-stage airflow mixing structure includes a gas main pipe, a connecting base connected in communication with the gas main pipe, and a combustion head sleeve installed on the outside of the connecting base. A gas branch pipe is installed on the connecting base, and a gas hole is opened at the top end of the gas branch pipe. An internal thread is opened on the inner wall of the gas branch pipe.

[0010] A ignition hole is provided in the middle of the connecting base;

[0011] The outer side of the gas branch pipe is fitted with a combustion-supporting pipe whose bottom end is fixedly connected to the connecting base, and the side wall of the combustion-supporting pipe is provided with combustion-supporting holes in an array.

[0012] The top of the combustion-supporting tube is fitted with a gradually expanding Venturi tube via a flange.

[0013] The gradually expanding Venturi tube is composed of a contraction section, a throat, and a diffuser section, and the contraction section, throat, and diffuser section are integrally formed structures.

[0014] The top of the gradually expanding venturi tube is fitted with a helical toothed disc.

[0015] Furthermore, three gas branch pipes are provided on the connecting base, and there is a height difference between the three gas branch pipes;

[0016] The length ratio of the three gas branch pipes is 1:2:3.

[0017] Furthermore, the top end of the gas branch pipe is designed with a tapered structure.

[0018] Furthermore, an igniter is installed inside the ignition hole.

[0019] Furthermore, a gap is reserved between the combustion-supporting tube and the helical toothed disc and the inner wall of the combustion head cover.

[0020] Furthermore, the area on the outside of the gas branch pipe that connects with the combustion-supporting pipe and the gradually expanding venturi pipe forms a primary combustion zone.

[0021] Furthermore, a secondary combustion zone is formed between the upper part of the helical toothed disc and the inner side of the combustion head cover.

[0022] Beneficial effects

[0023] Compared with existing technologies, the advantages of this utility model are:

[0024] (1) In this scheme, air enters the primary combustion zone through the combustion-supporting hole on the combustion-supporting pipe, and the flame is ejected from the gas hole at the top of the gas branch pipe. The internal thread design allows the inner wall of the gas branch pipe to better transfer heat. By increasing the heat radiation and conduction performance, the heat is quickly transferred to the cooling medium, thereby effectively dissipating heat. At the same time, the internal thread causes the fluid to rotate inside the pipe, which enhances the disturbance of the fluid near the inner wall of the pipe. The rotating fluid can prevent the accumulation of scale and rust inside the gas branch pipe, thereby effectively preventing pipe blockage and increasing the range of flame jet.

[0025] (2) In this scheme, after the combustible gas and the combustion air enter the gradually expanding venturi tube and mix, the airflow is accelerated by the change of cross section through the contraction section, throat and diffusion section to form a low-pressure zone, which promotes the mixing between fuel and air in the primary combustion zone and ensures the complete combustion of fuel. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the combustion head cover of this utility model;

[0028] Figure 3 This is a schematic diagram showing the disassembly of the gas branch pipe and the combustion-supporting pipe of this utility model;

[0029] Figure 4 This is a schematic diagram of the connecting base structure of this utility model;

[0030] Figure 5 This is a schematic diagram of the inner wall structure of the gas branch pipe of this utility model.

[0031] Explanation of the labels in the diagram:

[0032] 1. Gas main pipe; 2. Connecting base; 3. Combustion head cover; 4. Gas branch pipe; 5. Gas orifice; 6. Internal thread; 7. Ignition hole; 8. Combustion aid pipe; 9. Combustion aid orifice; 10. Gradually expanding Venturi tube; 11. Contraction section; 12. Throat; 13. Diffusion section; 14. Helical toothed disc. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0034] Example:

[0035] Please see Figure 1-5 An energy-saving burner with a multi-stage airflow mixing structure includes a gas main pipe 1, a connecting base 2 connected to the gas main pipe 1, and a combustion head sleeve 3 installed on the outside of the connecting base 2. A gas branch pipe 4 is installed on the connecting base 2. A gas hole 5 is opened at the top of the gas branch pipe 4, and an internal thread 6 is opened on the inner wall of the gas branch pipe 4.

[0036] A ignition hole 7 is provided in the middle of the connecting base 2;

[0037] A combustion-supporting pipe 8 with its bottom end fixedly connected to the connecting base 2 is sleeved on the outside of the gas branch pipe 4. The side wall of the combustion-supporting pipe 8 is provided with combustion-supporting holes 9 in an array.

[0038] The top of the combustion-supporting pipe 8 is fitted with a gradually expanding Venturi tube 10 via a flange;

[0039] The gradually expanding Venturi tube 10 is composed of a contraction section 11, a throat 12 and a diffuser section 13, and the contraction section 11, throat 12 and diffuser section 13 are integrally formed structures.

[0040] The top of the gradually expanding venturi tube 10 is fitted with a helical toothed disc 14;

[0041] It should be noted that, in use, this energy-saving burner with a multi-stage airflow mixing structure delivers gas through the main gas pipe 1 and distributes the gas to each gas branch pipe 4 through the connecting base 2. Then, it is ignited through the ignition hole 7. Air enters the primary combustion zone through the combustion-supporting hole 9 on the combustion-supporting pipe 8. The flame is ejected from the gas hole 5 at the top of the gas branch pipe 4. The internal thread 6 design allows the inner wall of the gas branch pipe 4 to better transfer heat. By increasing the heat radiation and conduction performance, heat is quickly transferred to the cooling medium, thereby effectively dissipating heat. At the same time, the internal thread 6 causes the fluid to rotate inside the pipe, enhancing the turbulence of the fluid near the inner wall of the pipe. The rotating fluid can also prevent scale and rust from forming inside the gas branch pipe 4, thereby effectively preventing pipe blockage and increasing the range of the flame jet.

[0042] After the combustible gas and combustion air mix in the diffuser venturi tube 10, the airflow is accelerated and a low-pressure zone is formed by the changes in cross-section of the contraction section 11, throat 12, and diffuser section 13, which promotes the mixing of fuel and air and ensures complete combustion.

[0043] like Figure 4 As shown, three gas branch pipes 4 are provided on the connecting base 2, and there is a height difference between the three gas branch pipes 4;

[0044] The length ratio of the three gas branch pipes 4 is 1:2:3;

[0045] It should be noted that the amount of gas and combustion air injected along the intake direction should decrease from large to small. When the combustion air just comes into contact with the gas, the injection volume is larger, which can improve the gas mixing efficiency. Then, some gas is diverted to the upper part of the highest gas branch pipe 4 and injected. With the lower mixture already burning, this is conducive to improving combustion efficiency.

[0046] like Figure 5 As shown, the top of the gas branch pipe 4 is set in a conical structure;

[0047] It should be noted that this helps to increase the pressure of combustible gas during the ejection process, thereby effectively increasing the range of the flame jet.

[0048] like Figure 2 , Figure 4 As shown, an igniter is installed inside the ignition hole 7, and the area where the outer side of the gas branch pipe 4 is connected to the combustion-supporting pipe 8 and the gradually expanding venturi pipe 10 forms the primary combustion zone.

[0049] It should be noted that this is used for igniting the mixed combustible gas in the first-stage burner zone.

[0050] like Figure 2 As shown, a gap is reserved between the combustion tube 8 and the helical toothed disc 14 and the inner wall of the combustion head cover 3.

[0051] It should be noted that this facilitates the entry of air and its mixing with flammable gases to create flammable conditions.

[0052] like Figure 2 As shown, a secondary combustion zone is formed between the upper part of the helical toothed disc 14 and the inner side of the combustion head cover 3;

[0053] It should be noted that the entire side and bottom of the gradually expanding Venturi tube 10 are covered by combustion air. The combustion air at the helical toothed disc 14 can form a perfect cooling protection ring, which can separate the gradually expanding Venturi tube 10 from the high-temperature area and extend the working life of the gradually expanding Venturi tube 10.

[0054] In use: Gas is supplied through the main gas pipe 1 and distributed to each gas branch pipe 4 through the connecting base 2. Then, it is ignited through the ignition hole 7. Air enters the primary combustion zone through the combustion-supporting hole 9 on the combustion-supporting pipe 8. The flame is ejected from the gas hole 5 at the top of the gas branch pipe 4. The internal thread 6 design allows the inner wall of the gas branch pipe 4 to better transfer heat. By increasing the heat radiation and conduction performance, heat is quickly transferred to the cooling medium, thereby effectively dissipating heat. At the same time, the internal thread 6 causes the fluid to rotate inside the pipe, which enhances the turbulence of the fluid near the inner wall of the pipe. The rotating fluid can prevent the accumulation of scale and rust inside the gas branch pipe 4, thereby effectively preventing pipe blockage and increasing the range of the flame jet.

[0055] After the combustible gas and combustion air enter the gradually expanding venturi tube 10 and mix, the airflow is accelerated by the change in cross-section of the contraction section 11, throat 12 and diffuser section 13, and a low-pressure zone is formed to promote the mixing between fuel and air, which can ensure the complete combustion of fuel.

[0056] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. An energy-saving burner with a multi-stage airflow mixing structure, comprising a gas main pipe (1), a connecting base (2) connected in communication with the gas main pipe (1), and a combustion head cover (3) installed on the outside of the connecting base (2), characterized in that: A gas branch pipe (4) is installed on the connecting base (2). A gas hole (5) is opened at the top of the gas branch pipe (4). An internal thread (6) is opened on the inner wall of the gas branch pipe (4). The connecting base (2) has a ignition hole (7) in the middle. The outer side of the gas branch pipe (4) is fitted with a combustion-supporting pipe (8) whose bottom end is fixedly connected to the connecting base (2), and the side wall of the combustion-supporting pipe (8) is provided with combustion-supporting holes (9) in an array. The top end of the combustion-supporting pipe (8) is fitted with a gradually expanding venturi tube (10) via a flange. The gradually expanding Venturi tube (10) is composed of a contraction section (11), a throat (12) and a diffuser section (13), and the contraction section (11), throat (12) and diffuser section (13) are integrally formed structures; The top of the gradually expanding venturi tube (10) is fitted with a helical toothed disc (14).

2. An energy-saving burner with a multi-stage airflow mixing structure according to claim 1, characterized in that: Three gas branch pipes (4) are provided on the connecting base (2), and there is a height difference between the three gas branch pipes (4); The length ratio of the three gas branch pipes (4) is 1:2:

3.

3. An energy-saving burner with a multi-stage airflow mixing structure according to claim 1, characterized in that: The top end of the gas branch pipe (4) is set in a conical structure.

4. An energy-saving burner with a multi-stage airflow mixing structure according to claim 1, characterized in that: An igniter is installed inside the ignition hole (7).

5. An energy-saving burner with a multi-stage airflow mixing structure according to claim 1, characterized in that: A gap is reserved between the combustion tube (8) and the helical toothed disc (14) and the inner wall of the combustion head cover (3).

6. An energy-saving burner with a multi-stage airflow mixing structure according to claim 1, characterized in that: The area where the outer side of the gas branch pipe (4) connects with the combustion-supporting pipe (8) and the gradually expanding venturi pipe (10) forms a primary combustion zone.

7. An energy-saving burner with a multi-stage airflow mixing structure according to claim 1, characterized in that: A secondary combustion zone is formed between the upper part of the helical toothed disc (14) and the inner side of the combustion head cover (3).

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