Fuel gas premixing pipe and distributor using same

Abstract

The utility model discloses a fuel gas premixing pipe and a distributor using the fuel gas premixing pipe, relates to a gas stove, and aims to solve the problems that the fuel gas pressure is smaller than the main air pressure, and after a burner is used for a long time, the fuel gas backflow phenomenon and the tempering phenomenon occur, so that potential safety hazards are caused. According to the technical scheme, the fuel gas premixing pipe is characterized by comprising a fuel gas pipe fitting, the fuel gas pipe fitting is provided with a volatilization and vaporization cavity, the volatilization and vaporization cavity is connected with a gas supplementing pipe, the gas supplementing pipe is communicated with a positive pressure air source, and the volatilization and vaporization cavity is used for premixing air and fuel gas and volatilizing and vaporizing the fuel gas. According to the fuel gas premixing pipe, sufficient volatilization of fuel gas is guaranteed, tempering is avoided, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to a gas stove, and more specifically to a gas premixing pipe and a distributor using the gas premixing pipe. Background Art

[0002] A gas stove refers to a kitchen appliance that uses gas fuels such as liquefied petroleum gas (liquid), artificial coal gas, and natural gas for direct flame heating. The burner is the core component of the gas stove. The gas premixing pipe is a component used to guide the gas into the burner, and the distributor is a component that provides and distributes gas and air to the burner.

[0003] In the prior art, a gas pipe is generally provided with a damper to allow natural air to enter, thereby achieving mixing with the gas, promoting volatilization and vaporization of the gas, and improving combustion completeness. For example, a burner damper adjustment mechanism and a stove assembly are disclosed in a Chinese patent publication with publication number CN113483325A, and the technical key points are: comprising a burner base, a damper plate and a nozzle, wherein a venturi ejector tube is provided on the burner base, and a damper hole is provided at the end of the venturi ejector tube; a damper regulator is provided on the burner base, and a damper plate mounting hole corresponding to the damper hole is provided on the damper regulator, and a plurality of air inlet slots are provided around the damper mounting hole; the damper plate is a disc structure, the peripheral edge of the damper plate is tightly matched with the inner wall of the damper mounting hole, and the depth of the damper plate in the damper mounting hole is adjustable; a through hole is provided at the center of the damper plate, and the air outlet of the nozzle is passed through the through hole.

[0004] The above technical solution is a typical gas and air mixing solution for civil burners. When used in commercial burners, since the commercial burners are equipped with a blowing mechanism, the gas pressure is lower than the main wind pressure during mixing. After the burner is used for a long time, gas backflow will occur, resulting in flashback, which brings safety hazards. Therefore, a new solution is needed to solve this problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a gas premixing pipe to ensure sufficient volatilization of the gas, avoid backfire and eliminate safety hazards.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a gas premixing pipe, including a gas pipe fitting, the gas pipe fitting is provided with a volatilization chamber, the volatilization chamber is connected to an air supply pipe, the air supply pipe is connected to a positive pressure air source, the volatilization chamber is used to premix air and gas, and volatilize the vaporized gas.

[0007] By adopting the above technical scheme, when supplying gas, the gas enters through the inlet end of the gas pipe fitting, passes through the volatilization vaporization chamber, and is finally ejected through the outlet of the gas pipe fitting; in the process of the gas passing through the volatilization vaporization chamber, the premixed air enters the volatilization vaporization chamber through the air supply pipe, and is premixed with the gas to achieve volatilization and vaporization of the gas; the premixed gas is ejected from the outlet end of the gas pipe fitting, and then mixed with the compressed air in the main air duct, and enters the burner for combustion; in summary, the present application performs premixing with a small amount of air through the volatilization vaporization chamber, thereby ensuring that the gas pressure is greater than the air pressure during premixing, ensuring sufficient volatilization of the gas, and avoiding backfire caused by the main air duct pressure being higher than the premixed gas pressure, thereby eliminating safety hazards.

[0008] The utility model is further configured as follows: the cross-sectional size of the volatilization chamber is larger than the gas pipe, and the whole is funnel-shaped, having an end face section and a tapered section, and the gas supply pipe is connected to the circumferential wall of the end face section.

[0009] The utility model is further configured as follows: the air supply pipe is L-shaped, and a screw sleeve is provided at its corner; the screw sleeve thread is matched with a flow regulating component, and the flow regulating component includes a hexagonal end, a threaded column arranged with the hexagonal end, and a plug column arranged at the front end of the threaded column.

[0010] The utility model is further configured as follows: an atomizing nozzle is arranged at the inlet end of the gas pipe.

[0011] The utility model is further configured as follows: the volatilization chamber is provided with a buffer net, and the outlet end of the air supply pipe is directly opposite to the buffer net.

[0012] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a distributor using a gas premixing tube, which premixes a small amount of air and gas so that the gas is mixed with the high-pressure air at the diffusion outlet in a vaporized state, thereby avoiding incomplete combustion due to limited volatilization of mist molecules, resulting in low efficiency and high emissions.

[0013] The above technical purpose of the utility model is achieved through the following technical solutions: a distributor using a gas premixing tube, including a gas premixing tube, and also including a gas collecting and distributing hood, the gas collecting and distributing hood including a pressurized air collecting chamber for connecting to a fan, and a diffuser air outlet for connecting to a stove head; the pressurized air collecting chamber is provided with a first branch pipe, the first branch pipe is connected to the air supply pipe; the diffuser air outlet is connected to the outlet end of the gas pipe fitting.

[0014] By adopting the above technical scheme, during normal operation, the blowing mechanism draws external air into the boost air collecting chamber, and in the process of the airflow advancing in the boost air collecting chamber, the air is gradually compressed and the air pressure gradually increases; the main compressed air is blown out through the diffusion outlet, and a small amount of air enters the volatilization chamber through the first branch pipe and the air supply pipeline to complete premixing with the gas; the premixed gas is sprayed into the diffusion outlet through the outlet end of the gas pipe fitting, and merges with the airflow of compressed air, and finally enters the stove to burn; in summary, the present application premixes a small amount of air and gas so that the gas is mixed with the high-pressure air of the diffusion outlet in a vaporized state, thereby avoiding inefficient and high-emission combustion due to limited volatilization of fog molecules.

[0015] The utility model is further configured as follows: an air distribution ring groove is provided on the outer wall of the air collecting and distributing cover between the pressurized air collecting chamber and the diffuser air outlet, and the air distribution ring groove is provided with a plurality of through holes connected with the diffuser air outlet.

[0016] The utility model is further configured as follows: the pressurized air collecting chamber is connected to a second branch pipe, the second branch pipe is connected to the middle flame area of ​​the stove head, and the second branch pipe is connected to a middle flame gas pipe fitting.

[0017] The utility model is further configured as follows: the pressurized air collecting chamber is connected with a third branch pipe and a fourth branch pipe, and the third branch pipe and the fourth branch pipe are used for replenishing air to the middle flame area of ​​the stove head.

[0018] In summary, the gas premixing tube disclosed by the utility model has the following beneficial effects: premixing with a small amount of air through the volatilization and vaporization chamber, thereby ensuring that the gas pressure is greater than the air pressure during premixing, ensuring sufficient volatilization of the gas, and avoiding backfire caused by the main air duct pressure being higher than the premixed gas pressure, thereby eliminating safety hazards; on the one hand, by increasing the spatial capacity of the end face section, the gas pressure after gas vaporization and the gas pressure of the premixed air entering are released to avoid the gas being pushed back by the gas pressure; on the other hand, by increasing the pressure of the tapered section, the flow rate of the premixed gas when it is ejected from the outlet end of the gas pipe fitting is increased; the premixed air enters from a direction perpendicular to the gas, reducing the influence of the premixed air on the gas forward direction and the premixed gas forward direction; the controllable premixed air pressure is achieved, further ensuring that the pressure of the mixed air is less than the gas pressure; the liquefied natural gas enters the gas pipe fitting in an atomized state, thereby improving its volatilization efficiency; the buffer net reduces the flow rate of the premixed air when it enters the volatilization and vaporization chamber, effectively reducing the impact of the premixed air.

[0019] The utility model discloses a distributor using a gas premixing pipe, which has the following beneficial effects: by premixing a small amount of air and gas, the gas is mixed with the high-pressure air of the diffusion outlet in a vaporized state, thereby avoiding inefficient and high-emission caused by insufficient combustion due to limited volatilization of mist molecules; the premixed gas sprayed from the outlet end of the gas pipe is sprayed into the diffusion outlet through multiple diffusion outlets after being guided by the gas distribution ring groove, effectively improving the uniformity of distribution of the mixed gas at the diffusion outlet; the air required for combustion is supplemented for the middle flame area, further ensuring the completeness of combustion in this area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the first embodiment;

[0021] Figure 2 is a cross-sectional view of embodiment 1;

[0022] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2;

[0023] Figure 4 It is a partial cross-sectional view of the second embodiment.

[0024] Description of the drawings: 1. Gas pipe fittings; 2. Volatilization and vaporization chamber; 3. Air supply pipe; 4. End face section; 5. Conical section; 6. Sleeve; 7. Hexagonal end; 8. Threaded column; 9. Plug column; 10. Atomizing nozzle; 11. Buffer net; 12. Gas collecting and distributing hood; 13. Pressurized air collecting chamber; 14. Diffusion outlet; 15. First branch pipe; 16. Through hole; 17. Gas distribution ring groove; 18. Second branch pipe; 19. Middle flame gas pipe fittings; 20. Third branch pipe; 21. Fourth branch pipe. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Embodiment 1: A gas premixing pipe, such as Figure 1 , Figure 2 As shown, it includes a gas pipe 1, which is integrally formed with a volatilization chamber 2, the volatilization chamber 2 is connected to an air supply pipe 3, the air supply pipe 3 is connected to a positive pressure air source, and the volatilization chamber 2 is used for premixing air and gas and volatilizing the vaporized gas.

[0027] When the gas is supplied, the gas enters through the inlet end of the gas pipe 1, passes through the volatilization vaporization chamber 2, and is finally ejected through the outlet of the gas pipe 1; in the process of the gas passing through the volatilization vaporization chamber 2, the premixed air enters the volatilization vaporization chamber 2 through the air supply pipe 3, and is premixed with the gas to achieve volatilization and vaporization of the gas; the premixed gas is ejected from the outlet end of the gas pipe 1, and then mixed with the compressed air in the main air duct and enters the burner for combustion; in summary, the present application premixes the gas with a small amount of air through the volatilization vaporization chamber 2, thereby ensuring that the gas pressure is greater than the air pressure during premixing, ensuring sufficient volatilization of the gas, and avoiding backfire caused by the main air duct pressure being higher than the premixed gas pressure, thereby eliminating safety hazards.

[0028] The specific structure of the volatilization chamber 2 is as follows: Figure 2 As shown, the cross-sectional size of the volatilization chamber 2 is larger than that of the gas pipe 1, and the whole is funnel-shaped, and has an end face section 4 and a tapered section 5. On the one hand, the space capacity of the end face section 4 is increased to release the gas pressure after gasification and the gas pressure of the premixed air entering, thereby preventing the gas from being pushed back by the gas pressure. On the other hand, the tapered section 5 is pressurized to increase the flow rate of the premixed gas when it is sprayed out from the outlet end of the gas pipe 1.

[0029] It should be noted that if Figure 1 , Figure 2 As shown, the air supply pipe 3 is connected to the circumferential wall of the end face section 4, so that the premixed air enters from a direction perpendicular to the gas, reducing the influence of the premixed air on the forward direction of the gas and the forward direction of the premixed gas.

[0030] To ensure that the premixed air pressure is lower than the gas pressure, Figure 2 As shown, the air supply pipe 3 is L-shaped, and a screw sleeve 6 is integrally formed at its corner. The screw sleeve 6 is threaded with a flow regulating component, and the flow regulating component includes a hexagonal end 7, a threaded column 8 arranged with the hexagonal end 7, and a plug column 9 arranged at the front end of the threaded column 8; by twisting the hexagonal end 7 in different directions, the flow rate of the air supply pipe 3 can be controlled, thereby realizing the controllable pressure of the premixed air, and further ensuring that the pressure of the mixed air is lower than the pressure of the fuel gas.

[0031] In order to improve the volatilization efficiency of liquefied natural gas in the volatilization chamber 2, Figure 2 As shown, an atomizing nozzle 10 is provided at the inlet end of the gas pipe 1, so that the liquefied natural gas enters the gas pipe 1 in an atomized state, thereby improving its volatilization efficiency.

[0032] To reduce the impact force of premixed air, Figure 2 As shown, the volatilization chamber 2 is unfolded and fixed with a buffer net 11, and the outlet end of the air supply pipe 3 is directly opposite to the buffer net 11, so that the buffer net 11 reduces the flow rate of the premixed air when it enters the volatilization chamber 2, effectively reducing the impact force of the premixed air.

[0033] Embodiment 2: A distributor using a gas premixing pipe, such as Figure 3 , Figure 4 As shown, it includes the gas premixing pipe as described in Example 1, and also includes a gas collecting and distributing hood 12, the gas collecting and distributing hood 12 includes a pressurized air collecting chamber 13 for connecting to the fan, and a diffuser air outlet 14 for connecting to the stove head; the pressurized air collecting chamber 13 is provided with a first branch pipe 15, and the first branch pipe 15 is connected to the air supply pipe 3; the diffuser air outlet 14 is connected to the outlet end of the gas pipe 1.

[0034] During normal operation, the blowing mechanism draws external air into the boost air collecting chamber 13. During the process of the airflow advancing in the boost air collecting chamber 13, the air is gradually compressed and the air pressure gradually increases; the main compressed air is blown out through the diffusion outlet 14, and a small amount of air enters the volatilization chamber 2 through the first branch pipe 15 and the air supply pipe 3 to complete premixing with the gas; the premixed gas is sprayed into the diffusion outlet 14 through the outlet end of the gas pipe 1, and merges with the airflow of compressed air, and finally enters the stove to burn; in summary, the present application premixes a small amount of air and gas so that the gas is mixed with the high-pressure air of the diffusion outlet 14 in a vaporized state, thereby avoiding inefficient and high emissions caused by incomplete combustion due to limited volatilization of mist molecules.

[0035] The diffuser outlet 14 is connected to the outlet end of the gas pipe 1 in the following manner: Figure 4 As shown, the outer wall of the gas collecting and distributing hood 12 is provided with an air distribution ring groove 17 between the boost air collecting chamber 13 and the diffuser air outlet 14, and the air distribution ring groove 17 is provided with a plurality of through holes 16 connected with the diffuser air outlet 14; thereby, the premixed gas sprayed out from the outlet end of the gas pipe 1 is guided by the air distribution ring groove 17 and then sprayed into the diffuser air outlet 14 through the plurality of diffuser air outlets 14, thereby effectively improving the uniformity of distribution of the mixed gas at the diffuser air outlet 14.

[0036] This embodiment supplies medium flame gas to the stove head in the following manner: Figure 4 As shown, the pressurized air collecting chamber 13 is connected to a second branch pipe 18, the second branch pipe 18 is connected to the middle flame area of ​​the stove, and the second branch pipe 18 is connected to the middle flame gas pipe fitting 19; the gas enters the second branch pipe 18 through the middle flame gas pipe fitting 19, and at the same time, a small amount of air in the pressurized air collecting chamber 13 enters through the bottom end of the second branch pipe 18 and mixes with the gas to form a mixed gas, and finally the mixed gas is sprayed out from the top of the second branch pipe 18 for combustion in the middle flame area of ​​the stove.

[0037] In order to improve the combustion completeness in the middle flame area, Figure 3As shown, the boost air collecting chamber 13 is connected to a third branch pipe 20 and a fourth branch pipe 21, which are used to supply air to the middle flame area of ​​the stove, thereby replenishing the air required for combustion in the middle flame area and further ensuring the completeness of combustion in this area.

[0038] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A gas premixing pipe, comprising a gas pipe fitting (1), characterized in that: The gas pipe (1) is provided with a volatilization chamber (2), the volatilization chamber (2) is connected to an air supply pipe (3), the air supply pipe (3) is connected to a positive pressure air source, and the volatilization chamber (2) is used to premix air and gas and volatilize the gas.

2. A gas premixing pipe according to claim 1, characterized in that: The cross-sectional size of the volatilization chamber (2) is larger than that of the gas pipe (1), and is funnel-shaped as a whole, having an end face section (4) and a conical section (5), and the gas supply pipe (3) is connected to the circumferential wall of the end face section (4).

3. A gas premixing pipe according to claim 1, characterized in that: The air supply pipe (3) is L-shaped, and a screw sleeve (6) is provided at its corner. The screw sleeve (6) is threadedly matched with a flow regulating member, and the flow regulating member includes a hexagonal end (7), a threaded column (8) arranged on the hexagonal end (7), and a plug column (9) arranged at the front end of the threaded column (8).

4. A gas premixing pipe according to claim 1, characterized in that: An atomizing nozzle (10) is provided at the inlet end of the gas pipe (1).

5. A gas premixing pipe according to claim 1, characterized in that: The volatilization chamber (2) is provided with a buffer net (11), and the outlet end of the air supply pipe (3) is directly opposite to the buffer net (11).

6. A distributor using a gas premixing pipe, characterized in that: It comprises a gas premixing pipe as claimed in any one of claims 1 to 4, and also comprises a gas collecting and distributing cover (12), wherein the gas collecting and distributing cover (12) comprises a pressurized air collecting chamber (13) for connecting to a fan, and a diffuser air outlet (14) for connecting to a stove head; The pressurized air collecting chamber (13) is provided with a first branch pipe (15), and the first branch pipe (15) is connected to the air supply pipe (3); The diffusion gas outlet (14) is in communication with the outlet end of the gas pipe (1).

7. A distributor using a gas premixing pipe according to claim 6, characterized in that: An air distribution ring groove (17) is provided on the outer wall of the air collecting and distributing cover (12) between the pressurized air collecting chamber (13) and the diffuser air outlet (14); the air distribution ring groove (17) is provided with a plurality of through holes (16) which are in communication with the diffuser air outlet (14).

8. A distributor using a gas premixing pipe according to claim 6, characterized in that: The pressurized air collecting chamber (13) is connected to a second branch pipe (18), the second branch pipe (18) is connected to the middle flame area of ​​the stove head, and the second branch pipe (18) is connected to a middle flame gas pipe fitting (19).

9. A distributor using a gas premixing pipe according to claim 8, characterized in that: The pressurized air collecting chamber (13) is connected to a third branch pipe (20) and a fourth branch pipe (21), and the third branch pipe (20) and the fourth branch pipe (21) are used to supply air to the middle flame area of ​​the stove.

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