Composite structure vented furnace bridge

Abstract

The utility model relates to a firewood stove technology, concretely relates to a composite structure ventilation furnace bridge. This ventilation furnace bridge includes furnace bridge seat, ventilation groove, air outlet hole, air inlet and ash chute, the furnace bridge seat mainly is composed of faceplate, middle frame board and bottom plate, the top of middle frame board is fixedly connected with faceplate, and its bottom is fixedly connected with bottom plate, the internal cavity that faceplate, middle frame board and bottom plate jointly enclose is used as the ventilation groove of furnace bridge seat, the air outlet hole is set up on faceplate and is communicated with ventilation groove, the air inlet is set up on bottom plate and is communicated with ventilation groove, the ash chute vertically penetrates faceplate, middle frame board and bottom plate, the ash chute and ventilation groove are in the state of insulation, and there is no through channel. This ventilation furnace bridge is small in size, can be directly embedded in the limited hearth space of traditional earthen oven, need not change the original structure of earthen oven, and is suitable for various rural traditional earthen ovens.

Description

Technical Field

[0001] This utility model relates to wood-fired stove technology, specifically to a composite structure ventilation furnace bridge. Background Technology

[0002] In rural cooking and heating scenarios, wood-burning stoves remain widely used due to their convenient fuel availability and low operating costs. The combustion-supporting core is a core component for improving the combustion efficiency of wood-burning stoves. To address the problems of incomplete combustion, excessive smoke emissions, and low energy utilization in traditional wood-burning stoves, existing combustion-supporting core technologies generally adopt a barrel-type double-layer structure design. This structure specifically includes an inner combustion cylinder and an outer sleeve, with an air circulation interlayer formed between the two cylinder walls. Ventilation holes are correspondingly set on the inner and outer cylinder walls, creating an air circulation path for air to permeate from the outside to the inside of the stove.

[0003] After air enters the interlayer through the ventilation holes in the outer cylinder wall, part of it enters the combustion chamber through the primary ventilation holes in the lower part of the inner cylinder to assist in the initial combustion of fuel. The remaining air is heated as it rises along the interlayer and then flows into the combustion chamber through the secondary ventilation holes in the upper part of the inner cylinder. It mixes thoroughly with the incompletely burned combustible gas and undergoes secondary combustion, thereby significantly improving the combustion effect and enhancing the firepower. At the same time, it reduces flue gas emissions and environmental pollution. It can also use the interlayer to preheat the air, improve energy utilization, and reduce the temperature of the outer wall of the furnace.

[0004] However, existing double-layered barrel-type combustion cores have significant shortcomings when adapted to traditional rural earthen stoves. Firstly, traditional earthen stoves typically consist of a stove platform, firebox, stove opening, and chimney. The firebox space is a limited area designed specifically for the size of the cookware and the layout of the house. The double-layered barrel-type combustion core, with its large overall volume and fixed shape, cannot be directly embedded into the limited space of the firebox, resulting in extremely poor compatibility. Secondly, applying this type of double-layered barrel-type combustion core to existing earthen stoves requires dismantling and modifying the firebox structure, and in some cases, even rebuilding the stove entirely. This not only makes the modification process cumbersome and time-consuming but also significantly increases the user's modification costs, limiting its widespread application in the renovation of traditional rural earthen stoves. Summary of the Invention

[0005] To address the problems of difficulty, high cost, and poor combustion effect in upgrading traditional earthen stoves and stoves without blower oxygen supply in existing technologies, this invention aims to provide a composite structure ventilation bridge. By simply replacing the traditional bridge, the stove function can be upgraded without dismantling or rebuilding it. This achieves the goals of reducing smoke emissions, enhancing firepower, and improving stove thermal efficiency, thus meeting users' needs for low-cost and convenient stove upgrades.

[0006] The technical solution to the above problems is: a composite structure ventilated furnace bridge, including a furnace bridge base, a ventilation slot, an air outlet, an air inlet, and an ash dropping trough; the furnace bridge base is mainly composed of a panel, a middle frame plate, and a bottom plate; the top of the middle frame plate is fixedly connected to the panel, and its bottom is fixedly connected to the bottom plate; the internal cavity formed by the panel, middle frame plate, and bottom plate together serves as the ventilation slot of the furnace bridge base; the air outlet is located on the panel and communicates with the ventilation slot; the air inlet is located on the bottom plate and communicates with the ventilation slot; the ash dropping trough vertically penetrates the panel, middle frame plate, and bottom plate; the ash dropping trough is isolated from the ventilation slot and has no through passage.

[0007] The further technical solution is as follows: the middle frame plate is a hollow frame; the two sides of the hollow frame are connected by a symmetrical array of multiple U-shaped frame units, and the middle area is hollow, so that the hollow structure of the multiple U-shaped frame units on the left and right sides forms an integral rectangular frame structure with the help of the upper and lower frames; the groove of the U-shaped frame unit serves as a dust removal groove, and the remaining hollow part serves as a ventilation groove.

[0008] The further technical solution is as follows: the panel is fixedly covered on the top of the middle frame plate, and an air outlet is provided at the position where the middle frame plate is hollowed out to form a ventilation groove, and an elongated through hole corresponding to the position where the middle frame plate is hollowed out to form a dust discharge groove is provided.

[0009] The further technical solution is as follows: the base plate is fixedly covered on the bottom of the middle frame plate, and a U-shaped through hole is opened at the position where the middle frame plate is hollowed out to form a ash dropping groove, which is adapted to the shape of the ash dropping groove. An air inlet is opened at the center of the base plate.

[0010] A further technical solution is that a ventilation duct is installed at the air inlet.

[0011] A further technical solution is that the panel shape matches that of commercially available stove bridges.

[0012] A further technical solution is that the middle frame plate and the front panel are welded together, and the middle frame plate and the bottom plate are welded together.

[0013] Due to the adoption of the above technical solution, the composite structure ventilation furnace bridge of this utility model has the following characteristics and beneficial effects: 1. Significantly reduced modification costs: No need to dismantle or rebuild the original earthen stove. It can be directly adapted to the firebox space of the traditional earthen stove, saving the extra investment in structural modification and greatly reducing the modification costs and usage threshold for users.

[0014] 2. Convenient and efficient replacement operation: Adopting an installation method compatible with traditional furnace bridges, the old furnace bridge can be directly replaced without complicated tools and professional construction skills. The installation process is simplified to three basic steps: "removing the old bridge, installing the new bridge, and connecting the air duct".

[0015] 3. Significantly Optimized Combustion Performance: Through the design of the hollow frame structure, the blower interface is integrated into the base plate, and the pipeline can be concealed from the bottom ash trough or the side, flexibly adapting to different kitchen layouts. After connecting the ventilation pipes and the blower, air enters the internal cavity formed by the base plate air inlet, the panel, the middle frame plate, and the base plate. Through the panel air outlet, precise secondary oxygen is supplied to the combustion chamber, promoting complete combustion of fuel. This transforms the traditional earthen stove into a gasification stove with low smoke emissions, strong firepower, and high combustion efficiency, improving fuel utilization and reducing environmental pollution, thus balancing practicality and environmental protection.

[0016] 4. Superior structural strength and durability, and strong adaptability: The panel adopts an integral thick plate design with no discrete gaps, resulting in a stable structure; the composite structure formed by the middle frame plate and the bottom plate is thick and has strong oxidation resistance, which can better withstand the long-term high-temperature environment of the furnace, thus significantly extending its service life; the panel size is similar to that of traditional furnace bridges. Compared with the existing barrel-type double-layer structure combustion core, this furnace bridge is compact and can be directly embedded into the limited furnace space of traditional earthen stoves without changing the original structure of the earthen stove. It is compatible with various rural traditional earthen stoves and has broad prospects for promotion and application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a composite ventilation furnace bridge according to an embodiment; Figure 2 This is a schematic diagram of the bottom of a composite structure ventilation furnace bridge according to an embodiment; Figure 3 This is an exploded schematic diagram of a composite structure ventilation furnace bridge according to an embodiment; Figure 4 This is a schematic diagram of the middle frame plate structure of a composite structure ventilation furnace bridge according to an embodiment; Figure 5 This is a schematic diagram of the panel of a composite structure ventilation furnace bridge according to an embodiment; Figure 6 This is a schematic diagram of the base plate of a composite structure ventilation furnace bridge according to an embodiment; Figure 7 This is a diagram illustrating the usage status of a composite structure ventilation furnace bridge according to an embodiment.

[0018] In the picture: 1-Panel, 11-Long strip through hole, 2-Middle frame plate, 21-Top frame, 22-Bottom frame, 23-Side frame, 24-U-shaped frame unit, 3-Bottom plate, 31-U-shaped through hole, 4-Dust trough, 5-Air outlet, 6-Ventilation slot, 7-Air inlet, 8-Ventilation duct. Detailed Implementation

[0019] like Figures 1 to 3As shown, a composite structure ventilated furnace bridge includes a furnace bridge base, a ventilation slot 6, an air outlet 5, an air inlet 7, and an ash discharge trough 4. The furnace bridge base is mainly composed of a panel 1, a middle frame plate 2, and a base plate 3. The top of the middle frame plate 2 is fixedly connected to the panel 1, and its bottom is fixedly connected to the base plate 3. The internal cavity formed by the panel 1, the middle frame plate 2, and the base plate 3 serves as the ventilation slot 6 of the furnace bridge base. The air outlet 5 is located on the panel 1 and communicates with the ventilation slot 6. The air inlet 7 is located on the base plate 3 and communicates with the ventilation slot 6. The ash discharge trough 4 vertically penetrates the panel 1, the middle frame plate 2, and the base plate 3. The ash discharge trough 4 is isolated from the ventilation slot 6, with no through passage. This makes the internal cavity formed by the panel 1, the middle frame plate 2, and the base plate 3 relatively sealed, allowing air to escape only through the air outlet 5 on the panel 1. A ventilation pipe 8 is installed at the air inlet 7. (See Figure 1 for details.) Figure 7 When oxygen is supplied, after connecting the ventilation pipe 8 to the blower, air enters the internal cavity (i.e., ventilation slot 6) formed by the bottom plate air inlet 7, the panel, the middle frame plate and the bottom plate. It then supplies oxygen to the combustion chamber through the panel air outlet 5, promoting complete combustion of fuel and achieving precise secondary oxygen supply.

[0020] In this embodiment, the middle frame plate 2 is as follows: Figure 4 As shown, the middle frame plate 2 is a hollow frame; the two sides of this hollow frame are connected by a symmetrical array of multiple sets of U-shaped frame units 24, which are connected to the side frames 23 on the left and right sides. The middle area is hollow, so that the hollow structure of the multiple sets of U-shaped frame units 24 on the left and right sides forms an integral rectangular frame structure with the help of the upper frame 21 and the lower frame 22; the groove of the U-shaped frame unit 24 serves as a dust collection groove 4, and the remaining hollow part serves as a ventilation groove 6. The ventilation grooves 6 and dust collection grooves 4 on the left and right sides are distributed at intervals.

[0021] like Figure 5 As shown, the panel 1 is shaped to match the furnace bridge on the market (for easy universal installation), and is slightly larger than the middle frame plate 2. It is fixed to the top of the middle frame plate 2 by welding. An air outlet 5 is provided at the position where the middle frame plate is hollowed out to form a ventilation groove 6, and a long strip through hole 11 corresponding to the position where the middle frame plate is hollowed out to form a ash dropping groove 4 is provided.

[0022] like Figure 6 As shown, the base plate 3 is fixedly covered on the bottom of the middle frame plate 2 by welding. A U-shaped through hole 31 with the shape of the ash trough 4 is opened at the position of the ash trough 4 cut out in the middle frame plate. An air inlet 7 is opened at the center of the base plate 3 for connecting the ventilation pipe 8 and connecting to the air outlet of the blower through the ventilation pipe 8.

[0023] The installation and use method of this composite structure ventilation furnace bridge: The external dimensions of this ventilation bridge are consistent with those of other ventilation bridges on the market, for example, when replacing a traditional earthen stove: 1. Remove the old furnace bridge; 2. Directly install into this ventilation furnace bridge; 3. Connect the base plate air inlet to the ventilation pipes and blower; 4. Starting the blower can achieve secondary oxygen supply and change the combustion performance of the stove without dismantling or rebuilding the earthen stove.

[0024] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made using the content of the present utility model specification, or direct or indirect applications in the technical fields of other related products, are similarly included within the patent protection scope of the present utility model.

Claims

1. A composite structure ventilation furnace bridge, characterized in that: The furnace bridge includes a furnace bridge base, ventilation slots, air outlets, air inlets, and ash dropping channels. The furnace bridge base is mainly composed of a front panel, a middle frame plate, and a bottom plate. The top of the middle frame plate is fixedly connected to the front panel, and its bottom is fixedly connected to the bottom plate. The internal cavity formed by the front panel, middle frame plate, and bottom plate together serves as the ventilation slot of the furnace bridge base. The air outlets are located on the front panel and communicate with the ventilation slots. The air inlets are located on the bottom plate and communicate with the ventilation slots. The ash dropping channels vertically penetrate the front panel, middle frame plate, and bottom plate. The ash dropping channels are isolated from the ventilation slots and have no through passage.

2. The composite structure ventilation furnace bridge according to claim 1, characterized in that: The middle frame is a hollow frame; the two sides of the hollow frame are connected by a symmetrical array of multiple U-shaped frame units, and the middle area is hollow, so that the hollow structure of the multiple U-shaped frame units on the left and right sides forms an integral rectangular frame structure with the help of the upper and lower frames; the groove of the U-shaped frame unit serves as a dust removal groove, and the remaining hollow part serves as a ventilation groove.

3. The composite structure ventilation furnace bridge according to claim 2, characterized in that: The panel is fixedly covered on the top of the middle frame plate. An air outlet is provided at the position where the middle frame plate is hollowed out to form a ventilation groove, and an elongated through hole is provided at the position where the middle frame plate is hollowed out to form a dust discharge groove.

4. The composite structure ventilation furnace bridge according to claim 3, characterized in that: The base plate is fixedly covered on the bottom of the middle frame plate. A U-shaped through hole is opened at the position where the middle frame plate is hollowed out to form a ash dropping groove, and an air inlet is opened at the center of the base plate.

5. A composite structure ventilation furnace bridge according to claim 1, characterized in that: A ventilation duct is installed at the air inlet.

6. A composite structure ventilation furnace bridge according to claim 1, characterized in that: The panel's shape matches that of commercially available stove bridges.

7. A composite structure ventilation furnace bridge according to claim 1, characterized in that: The middle frame plate is welded to the front panel, and the middle frame plate is welded to the bottom plate.

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