Dual-channel fuel gas premixing structure

Abstract

The invention belongs to the technical field of fuel gas premixing, and discloses a double-channel fuel gas premixing structure which comprises a premixing pipe, a combustion chamber and a fuel gas seat, the combustion chamber is arranged at the top of the premixing pipe, the fuel gas seat is arranged at the top of the combustion chamber, a sealing gasket is arranged at the top of the combustion chamber, and a heat-resisting ring is arranged at the top of the sealing gasket. The bottom of the premixing pipe is connected with a diffusion pipe in a penetrating mode, a diffusion piece is arranged in the diffusion pipe, a fiber yarn layer is arranged in the diffusion pipe, and the combustion chamber and the fuel gas seat are connected through a sealing gasket and a heat-resisting ring by means of cooperation of the sealing gasket, the heat-resisting ring, the diffusion piece, an attaching frame, a filter screen, a round pad and a negative pressure fan. The sealing gasket enhances the sealing performance of connection of the negative pressure fan and the combustion chamber, the heat efficiency and the overall performance of the combustion chamber are improved, the negative pressure fan sucks external air through operation of the fan inside the negative pressure fan, surrounding air is sucked under the negative pressure effect so as to supplement exhausted air, and air circulation can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas premixing, and specifically relates to a dual-channel gas premixing structure. Background Art

[0002] The dual-channel gas premixing structure is a design solution for gas combustion systems, usually applied to gas boilers, gas water heaters, and gas stove equipment. Its core feature is to pre-mix gas and air separately through two independent channels and then mix and burn them in the combustion chamber. One channel is used to transport air, and the other channel is used to transport gas. Before entering the burner, the gas and air will be fully mixed in the pre-mixing chamber. After the mixed gas is adjusted, it enters the combustion chamber. After the mixed gas enters the combustion chamber, it will be ignited and burned with the help of an ignition device. Through this dual-channel pre-mixing structure, combustion can occur at a relatively low temperature, thereby reducing the generation of harmful gases.

[0003] However, an existing dual-channel gas premixing structure is not perfect and still has certain defects:

[0004] Compared with traditional combustion systems, the dual-channel structure is more complex in design, involving more pipelines and channels. This complexity may increase the manufacturing cost and the complexity of maintenance. The design of the channels and the uneven distribution of airflows may still result in uneven combustion, causing some areas to burn too fast while other areas burn incompletely. The shape of the combustion chamber design makes the airflows unable to transition smoothly, affecting the distribution of airflows in the combustion chamber and reducing the quality of gas premixing. Summary of the Invention

[0005] The purpose of the present invention is to provide a dual-channel gas premixing structure to solve the problems of uneven design of channels and airflow distribution, still possible uneven combustion, resulting in some areas burning too fast while other areas burning incompletely, and the shape of the combustion chamber design causing the airflows unable to transition smoothly as mentioned in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A dual-channel gas premixing structure, including a premixing pipe, a combustion chamber, and a gas seat. The combustion chamber is arranged on the top of the premixing pipe, the gas seat is arranged on the top of the combustion chamber, a sealing gasket is arranged on the top of the combustion chamber, a heat-resistant ring is arranged on the top of the sealing gasket. The bottom of the premixing pipe is inserted and connected with a diffusion pipe. A diffusion member is arranged inside the diffusion pipe, a fiber filament layer is arranged inside the diffusion pipe, a heat-insulating layer is arranged inside the diffusion pipe, a corrosion-resistant layer is coated on the inner surface of the diffusion pipe. A first round sleeve is fixedly sleeved at one end of the diffusion pipe, a round gasket is arranged at one end of the diffusion pipe, a negative pressure fan is arranged on one side of the round gasket, a fitting frame is arranged on one side of the diffusion member, and a filter screen is arranged inside the fitting frame.

[0007] Preferably, the bottom surface of the heat-resistant ring is fixed to the surface of the sealing gasket, the bottom surface of the gas seat is fixed to the top of the heat-resistant ring, a diversion pipe is fixedly inserted and connected to the bottom end inside the combustion chamber, and a plurality of branch plates are fixedly installed on the outer wall of the diversion pipe.

[0008] Preferably, the positions where the plurality of branch plates are arranged are equally spaced, a first restraint sleeve is fixedly sleeved on one end of the diffuser pipe, a plurality of reinforcing bars are fixedly installed on one side of the first restraint sleeve, and a second restraint sleeve is fixedly sleeved on the other end of the diffuser pipe.

[0009] Preferably, one ends of the plurality of reinforcing bars are respectively fixedly connected to one side of the second restraint sleeve, the positions where the plurality of reinforcing bars are arranged are equally spaced, and two reinforcing plates are fixedly installed at the bottom ends of the first restraint sleeve and the second restraint sleeve.

[0010] Preferably, reinforcing seats are fixedly installed at the bottom ends of the four reinforcing plates, a second circular sleeve is fixedly sleeved on one end of the round gasket, and arc-shaped blocks are fixedly installed on both sides of the first circular sleeve and the second circular sleeve.

[0011] Preferably, a screw rod is movably inserted and connected inside adjacent two of the arc-shaped blocks, limit nuts are threadedly sleeved at both ends of the two screw rods, a plurality of ventilation slots are formed on one side of the round gasket, and a dust-proof housing is arranged on one side of the round gasket.

[0012] Preferably, a double-pass pipe is inserted and connected to one side of the dust-proof housing, the positions where the plurality of ventilation slots are arranged are equally spaced, and the positions of adjacent two of the arc-shaped blocks correspond to each other.

[0013] Preferably, two concave holes are formed on one side of the diffuser, two limiting strips are arranged on one side of the fitting frame, one ends of the two limiting strips are respectively threadedly connected to the inside of the two concave holes, and the two limiting strips are symmetrically distributed with respect to the central position of the fitting frame.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. Through the cooperation of the sealing gasket, heat-resistant ring, branch plate, diffuser, fitting frame, filter screen, round gasket and negative pressure fan provided in the present invention, the combustion chamber and the gas seat are connected through the sealing gasket and the heat-resistant ring. The sealing gasket enhances the sealing performance of the connection between the two. The heat-resistant ring is made of alumina material to maintain the structural stability, prevent the material from melting, softening and deforming, and extend the service life of the combustion chamber. The branch plate is used to support the guide pipe to ensure the firmness of the guide pipe. One side of the fitting frame fits with one side of the diffuser. The filter screen is located at the air inlet, which can block and filter the dirt in the external environment, improve the quality of gas premixing. The diffuser is designed with a gradually changing cross-section, and the cross-sectional area gradually decreases from the inlet to the outlet, which helps the air flow to transition smoothly, reduces the influence of turbulence on the air flow, optimizes the air flow distribution, can realize the uniform mixing of the air flow and the gas, improve the thermal efficiency and overall performance of the combustion chamber. The negative pressure fan operates through the internal fan to inhale the external air. This negative pressure effect causes the surrounding air to be inhaled to supplement the exhausted air, and can realize the air circulation.

[0016] 2. Through the cooperation of the limiting strip, fiber filament layer, heat insulation layer, corrosion-resistant layer, first round sleeve, screw and limiting nut provided in the present invention, after one end of the two limiting strips is embedded into the concave hole and the two are threadedly connected, the installation of the diffuser and the fitting frame can be realized. The fiber filament layer is made of carbon fiber material, which has mechanical properties, high temperature resistance and chemical stability. The heat insulation layer is made of polystyrene material, and its main function is to reduce the conduction and radiation of heat, prevent the loss of heat energy and the entry of external heat. The corrosion-resistant layer is an epoxy resin coating, and its main function is to prevent substances from undergoing chemical reactions in a corrosive environment, maintain the structural stability and durability, help extend the service life of the equipment, and reduce the maintenance cost. After the two arc-shaped blocks are closely fitted, the screw is inserted into the two arc-shaped blocks, and then the two limiting nuts are sleeved on the screw ends by threads, and the installation of the first round sleeve and the second round sleeve can be realized.

[0017] 3. Through the cooperation of the ventilation groove, first restraint sleeve, second restraint sleeve, reinforcement strip, dust-proof housing, reinforcement plate and reinforcement seat provided in the present invention, the purpose of setting the ventilation groove is to realize the air circulation. The first restraint sleeve and the second restraint sleeve are connected by a plurality of reinforcement strips, and both are wrapped on the outer surface of the diffusion pipe, enhancing the stability of the bottom of the premixing pipe. The dust-proof housing mainly covers the outer surface of the negative pressure fan. By installing the limiting mechanism and the reinforcement seat, the fixation of the diffusion pipe can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view structural schematic diagram of the present invention;

[0019] Figure 2 is the partial front view sectional structural schematic diagram of the present invention;

[0020] Figure 3 For the present invention Figure 2 An enlarged view of part A in

[0021] Figure 4 An exploded view of a part of the present invention;

[0022] Figure 5 For the present invention Figure 4 An enlarged view of part B in

[0023] Figure 6 A schematic diagram of the partial side view structure of the present invention.

[0024] In the figure: 1, premixing pipe; 2, combustion chamber; 3, sealing gasket; 4, heat-resistant ring; 5, gas seat; 6, diversion pipe; 7, branch plate; 8, diffusion pipe; 9, reinforcement plate; 10, reinforcement seat; 11, diffusion part; 12, fitting frame; 13, filter screen; 14, limiting strip; 15, fiber filament layer; 16, heat insulation layer; 17, corrosion-resistant layer; 18, first restraint sleeve; 19, second restraint sleeve; 20, reinforcement bar; 21, first round sleeve; 22, round gasket; 23, second round sleeve; 24, ventilation slot; 25, negative pressure fan; 26, arc-shaped block; 27, screw; 28, limiting nut; 29, dust-proof housing; 30, double-pass pipeline. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] As Figures 1 to 6 shown, the embodiments of the present invention provide a technical solution for a dual-channel gas premixing structure:

[0027] Embodiment 1:

[0028] As Figures 1 - 2As shown in the figure, a dual-channel gas premixing structure includes a premixing pipe 1, a combustion chamber 2, and a gas seat 5. The combustion chamber 2 is arranged at the top of the premixing pipe 1, and the gas seat 5 is arranged at the top of the combustion chamber 2. A sealing gasket 3 is arranged at the top of the combustion chamber 2, and a heat-resistant ring 4 is arranged at the top of the sealing gasket 3. The bottom of the premixing pipe 1 is inserted and connected with a diffusion pipe 8. A diffusion member 11 is arranged inside the diffusion pipe 8. A fiber filament layer 15 is arranged inside the diffusion pipe 8. A heat-insulating layer 16 is arranged inside the diffusion pipe 8. The inner surface of the diffusion pipe 8 is coated with a corrosion-resistant layer 17. A first circular sleeve 21 is fixedly sleeved at one end of the diffusion pipe 8. A circular gasket 22 is arranged at one end of the diffusion pipe 8. A negative pressure fan 25 is arranged on one side of the circular gasket 22. A fitting frame 12 is arranged on one side of the diffusion member 11. A filter screen 13 is arranged inside the fitting frame 12. The bottom surface of the heat-resistant ring 4 is fixed to the surface of the sealing gasket 3. The bottom surface of the gas seat 5 is fixed to the top of the heat-resistant ring 4. A guide pipe 6 is fixedly inserted and connected to the bottom end inside the combustion chamber 2. A plurality of branch plates 7 are fixedly installed on the outer wall of the guide pipe 6. The positions where the plurality of branch plates 7 are arranged are equally spaced. A first restraint sleeve 18 is fixedly sleeved at one end of the diffusion pipe 8. A plurality of reinforcing bars 20 are fixedly installed on one side of the first restraint sleeve 18. A second restraint sleeve 19 is fixedly sleeved at the other end of the diffusion pipe 8. The combustion chamber 2 and the gas seat 5 are connected through the sealing gasket 3 and the heat-resistant ring 4. The sealing gasket 3 enhances the sealing performance of the connection between the two. The heat-resistant ring 4 is made of alumina material, maintaining the structural stability, preventing the material from melting, softening, and deforming, and extending the service life of the combustion chamber 2. The branch plates 7 are used to support the guide pipe 6, ensuring the firmness of the guide pipe 6. One side of the fitting frame 12 is mutually attached to one side of the diffusion member 11. The filter screen 13 is located at the air inlet, capable of blocking and filtering the dirt in the external environment, improving the quality of gas premixing. The diffusion member 11 is designed with a gradually changing cross-section, gradually reducing the cross-sectional area from the inlet to the outlet, which helps the air flow to transition smoothly, reduces the influence of turbulence on the air flow, optimizes the air flow distribution, can achieve uniform mixing of the air flow and the gas, improves the thermal efficiency and overall performance of the combustion chamber. The negative pressure fan 25 operates through the internal fan, sucking in external air. This negative pressure effect causes the surrounding air to be sucked in to supplement the exhausted air, enabling air circulation.

[0029] Embodiment 2:

[0030] Based on Embodiment 1, as Figures 2 - 4As shown, one end of each of the multiple reinforcing bars 20 is fixedly connected to one side of the second restraint sleeve 19. The multiple reinforcing bars 20 are arranged at equal intervals. Reinforcement plates 9 are fixedly installed at the bottom ends of both the first restraint sleeve 18 and the second restraint sleeve 19. Reinforcement seats 10 are fixedly installed at the bottom ends of the four reinforcement plates 9. A second circular sleeve 23 is fixedly sleeved on one end of the round pad 22. Arc-shaped blocks 26 are fixedly installed on both sides of the first circular sleeve 21 and the second circular sleeve 23. Through the cooperation of the provided limiting strip 14, fiber filament layer 15, heat insulation layer 16, corrosion-resistant layer 17, first circular sleeve 21, screw 27 and limiting nut 28, after one end of the two limiting strips 14 is inserted into the concave hole and the two are threadedly connected, the installation of the diffuser 11 and the fitting frame 12 can be realized. The fiber filament layer 15 is made of carbon fiber material and has mechanical properties, high temperature resistance and chemical stability. The heat insulation layer 16 is made of polystyrene material, and its main function is to reduce heat conduction and radiation, prevent heat energy from dissipating and external heat from entering. The corrosion-resistant layer 17 is an epoxy resin coating, and its main function is to prevent substances from undergoing chemical reactions in a corrosive environment, maintain structural stability and durability, help extend the service life of the equipment and reduce maintenance costs. After the two arc-shaped blocks 26 are closely fitted, the screw 27 is inserted into the two arc-shaped blocks 26, and then the two limiting nuts 28 are threadedly sleeved on both ends of the screw 27, so as to realize the installation of the first circular sleeve 21 and the second circular sleeve 23.

[0031] Embodiment Three:

[0032] On the basis of Embodiment One and Embodiment Two, as Figure 1 、 Figure 5 and Figure 6As shown, screw rods 27 are movably inserted and connected inside two adjacent arc-shaped blocks 26. Limiting nuts 28 are threadedly sleeved at both ends of the two screw rods 27. A plurality of ventilation grooves 24 are formed on one side of the round pad 22. A dust-proof housing 29 is arranged on one side of the round pad 22. A double-pass pipe 30 is inserted and connected through one side of the dust-proof housing 29. The positions where the plurality of ventilation grooves 24 are arranged are equally spaced. The positions of two adjacent arc-shaped blocks 26 correspond to each other. Two concave holes are formed on one side of the diffuser 11. Two limiting strips 14 are arranged on one side of the fitting frame 12. One ends of the two limiting strips 14 are respectively threadedly connected to the inside of the two concave holes. The two limiting strips 14 are symmetrically distributed with respect to the central position of the fitting frame 12. Through the cooperation of the ventilation grooves 24, the first restraint sleeve 18, the second restraint sleeve 19, the reinforcing strips 20, the dust-proof housing 29, the reinforcing plate 9 and the reinforcing seat 10, the purpose of arranging the ventilation grooves 24 is to achieve air circulation. The first restraint sleeve 18 and the second restraint sleeve 19 are connected by a plurality of reinforcing strips 20, and both are wrapped on the outer surface of the diffuser pipe 8, enhancing the stability of the bottom of the premixing pipe 1. The dust-proof housing 29 mainly covers the outer surface of the negative pressure fan 25. By installing the limiting mechanism and the reinforcing seat 10, the fixing of the diffuser pipe 8 can be realized.

[0033] Working principle and usage process of the present invention: The dual-channel gas premixing structure is a design solution for gas combustion systems, commonly applied in gas boilers, gas water heaters, and gas stove equipment. Its core feature is to pre-mix gas and air separately through two independent channels and then conduct mixed combustion in the combustion chamber. One channel is used to transport air, and the other is used to transport gas. Before entering the burner, the gas and air will be fully mixed in the pre-mixing chamber. After the mixed gas is adjusted, it enters the combustion chamber. After the mixed gas enters the combustion chamber, it will be ignited and burned with the help of the ignition device. Through this dual-channel pre-mixing structure, combustion can occur at a relatively low temperature, thereby reducing the generation of harmful gases. Compared with traditional combustion systems, the dual-channel structure is more complex in design, involving more pipelines and channels. This complexity may increase the manufacturing cost and the complexity of maintenance. Due to uneven design of the channels and airflow distribution, problems of uneven combustion may still occur, resulting in too fast combustion in some areas and incomplete combustion in other areas. The shape of the combustion chamber design causes the airflow not to transition smoothly, affecting the distribution of the airflow in the combustion chamber and reducing the quality of gas premixing. The combustion chamber 2 and the gas seat 5 are connected through a sealing gasket 3 and a heat-resistant ring 4. The sealing gasket 3 enhances the sealing performance of the connection between the two. The heat-resistant ring 4 is made of alumina material, maintaining the structural stability, preventing the material from melting, softening, and deforming, and extending the service life of the combustion chamber 2. The branch plate 7 is used to support the diversion pipe 6, ensuring the firmness of the diversion pipe 6. One side of the fitting frame 12 fits with one side of the diffuser 11. The filter screen 13 is located at the air inlet, capable of blocking and filtering dirt in the external environment, improving the quality of gas premixing. The diffuser 11 is designed with a gradually changing cross-section, gradually reducing the cross-sectional area from the inlet to the outlet, which helps the airflow to transition smoothly, reduces the influence of turbulence on the airflow, optimizes the airflow distribution, can achieve uniform mixing of the airflow and gas, and improves the thermal efficiency and overall performance of the combustion chamber. The negative pressure fan 25 operates its internal fan to inhale external air. This negative pressure effect causes the surrounding air to be inhaled to supplement the exhausted air, enabling air circulation. After one end of the two limit strips 14 is inserted into the internal concave hole and the two are threadedly connected, the installation of the diffuser 11 and the fitting frame 12 can be achieved. The fiber filament layer 15 is made of carbon fiber material, having mechanical properties, high temperature resistance, and chemical stability. The heat insulation layer 16 is made of polystyrene material, and its main function is to reduce heat conduction and radiation, prevent heat energy dissipation and external heat from entering. The corrosion-resistant layer 17 is an epoxy resin coating, and its main function is to prevent substances from undergoing chemical reactions in a corrosive environment, maintaining structural stability and durability, helping to extend the service life of the equipment and reduce the maintenance cost. After the two arc-shaped blocks 26 are closely fitted, the screw rod 27 is inserted into the interior of the two arc-shaped blocks 26, and then the two limit nuts 28 are threadedly sleeved on both ends of the screw rod 27, and the installation of the first round sleeve 21 and the second round sleeve 23 can be achieved.The purpose of setting the ventilation slots 24 is to achieve air circulation. The first restraint sleeve 18 and the second restraint sleeve 19 are connected by a plurality of reinforcing bars 20, and both are wrapped on the outer surface of the diffusion tube 8, enhancing the stability of the bottom of the premixing tube 1. The dust-proof housing 29 mainly covers the outer surface of the negative pressure fan 25. By installing the limiting mechanism and the reinforcing seat 10, the fixation of the diffusion tube 8 can be achieved. One side of the dust-proof housing 29 is inserted and connected with a double-pass pipeline 30. The positions where the plurality of ventilation slots 24 are set are arranged at equal intervals, and the positions of two adjacent arc-shaped blocks 26 correspond to each other. Two concave holes are formed on one side of the diffuser 11, and two limiting strips 14 are arranged on one side of the fitting frame 12.,

[0034] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-channel gas premixing structure, comprising a premixing tube (1), a combustion chamber (2) and a gas seat (5), wherein the combustion chamber (2) is arranged on the top of the premixing tube (1), and the gas seat (5) is arranged on the top of the combustion chamber (2), characterized in that: A sealing gasket (3) is arranged at the top of the combustion chamber (2), a heat-resistant ring (4) is arranged at the top of the sealing gasket (3), a diffusion tube (8) is inserted and connected at the bottom of the premixing tube (1), a diffusion piece (11) is arranged inside the diffusion tube (8), a fiber layer (15) is arranged inside the diffusion tube (8), a heat insulation layer (16) is arranged inside the diffusion tube (8), the inner surface of the diffusion tube (8) is coated with a corrosion-resistant layer (17), a first circular sleeve (21) is fixedly provided at one end of the diffusion tube (8), a circular pad (22) is arranged at one end of the diffusion tube (8), a negative pressure fan (25) is arranged on one side of the circular pad (22), a bonding frame (12) is arranged on one side of the diffusion piece (11), and a filter screen (13) is arranged inside the bonding frame (12).

2. A dual-channel gas premixing structure according to claim 1, characterized in that: The bottom surface of the heat-resistant ring (4) is fixed to the surface of the sealing gasket (3), the bottom surface of the gas seat (5) is fixed to the top of the heat-resistant ring (4), and a guide tube (6) is fixedly inserted and connected to the bottom end of the combustion chamber (2), and a plurality of branch plates (7) are fixedly installed on the outer wall of the guide tube (6).

3. A dual-channel gas premixing structure according to claim 2, characterized in that: The plurality of branch plates (7) are arranged at equal intervals, one end of the diffuser tube (8) is fixedly sleeved with a first restraining sleeve (18), one side of the first restraining sleeve (18) is fixedly mounted with a plurality of reinforcement strips (20), and the other end of the diffuser tube (8) is fixedly sleeved with a second restraining sleeve (19).

4. A dual-channel gas premixing structure according to claim 3, characterized in that: One end of each of the plurality of reinforcement strips (20) is fixedly connected to one side of the second restraining sleeve (19), and the plurality of reinforcement strips (20) are arranged at equal intervals. Two reinforcement plates (9) are fixedly mounted at the bottom ends of the first restraining sleeve (18) and the second restraining sleeve (19).

5. A dual-channel gas premixing structure according to claim 4, characterized in that: A reinforcement seat (10) is fixedly mounted at the bottom ends of the four reinforcement plates (9); a second circular sleeve (23) is fixedly mounted on one end of the circular pad (22); and arc blocks (26) are fixedly mounted on both sides of the first circular sleeve (21) and the second circular sleeve (23).

6. A dual-channel gas premixing structure according to claim 5, characterized in that: The interiors of two adjacent arc blocks (26) are movably connected with screw rods (27), and both ends of the two screw rods (27) are threadedly sleeved with limit nuts (28). One side of the circular pad (22) is provided with a plurality of ventilation grooves (24), and one side of the circular pad (22) is provided with a dustproof shell (29).

7. A dual-channel gas premixing structure according to claim 6, characterized in that: A double-pass pipe (30) is inserted and connected to one side of the dustproof housing (29); the positions of the plurality of ventilation slots (24) are arranged at equal intervals, and the positions of two adjacent arc blocks (26) are corresponding.

8. The dual-channel gas premixing structure according to claim 1, characterized in that: Two concave holes are provided on one side of the diffusion member (11), and two limiting strips (14) are provided on one side of the bonding frame (12). One end of the two limiting strips (14) is respectively connected to the internal threads of the two concave holes, and the two limiting strips (14) are symmetrically distributed at the center position of the bonding frame (12).

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