A combustion head

Abstract

A burner head includes a main chamber with a feed inlet, multiple igniter ports, and air outlets. Multiple auxiliary chambers and a linkage device are located within the main chamber. The linkage device drives each auxiliary chamber to extend and retract within the main chamber. Ventilation meshes are provided on both the main and auxiliary chambers. The linkage device is a multi-link assembly structure, with each link connected end-to-end. A baffle is located on one side of each auxiliary chamber, and a nut is hinged to the baffle via a link. When the linkage device drives two auxiliary chambers to approach each other, the two baffles on the two auxiliary chambers either interlock or have one end of each baffle touching. This invention solves the problem of insufficient combustion area in existing burner heads due to the fixed size of the tea oven opening; simultaneously, it ensures that air moves vertically upwards through the ventilation mesh, thus directing the flame upwards.

Description

[0001] This invention is a divisional application of "A combustion head for a biomass burner" (application number: 2018114003075; application date: 2018-11-22). Technical Field

[0002] This invention belongs to the field of biomass burners, and specifically relates to a burner head. Background Technology

[0003] Currently, biomass fuel is an environmentally friendly fuel, producing less dust and smoke during combustion and having a high calorific value. It has been widely used in industrial production. Biomass burners are widely used in the tea roasting industry. The existing burner head is a slotted box structure, and its size and structure are designed for the furnace opening of the tea roasting oven. Since the furnace opening size is fixed, the existing burner head size and structure are also fixed. The biggest drawback of this structure is that the combustion area is small, the firepower is weak, and the biomass fuel is not fully burned, which cannot meet the needs of the existing tea roasting oven. Secondly, when the existing burner head is in use, the flame will burn forward under the action of the blower, rather than upward, but in actual use, it has been proven that upward burning of the flame is optimal.

[0004] Therefore, a burner with higher combustion efficiency and firepower requirements has great market potential, but such a device does not currently exist. Summary of the Invention

[0005] In view of the technical problems existing in the background art, the present invention provides a burner head that solves the problem that the combustion area of ​​the burner head is too small when the furnace opening size of the tea drying oven is fixed; at the same time, it ensures that the air moves vertically upward through the ventilation mesh, so that the flame burns upward.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A burner head includes a main tank box with a feed inlet, multiple igniter ports and air outlets, multiple auxiliary tank boxes and a linkage device inside the main tank box, the linkage device can drive each auxiliary tank box to extend and retract inside the main tank box, and the main tank box and auxiliary tank boxes are provided with breathable mesh. The linkage device includes a rotating shaft connected to the main slot box. One end of the rotating shaft located inside the main slot box has an external thread, and multiple nuts are installed on the external thread. The nuts are hinged to each auxiliary slot box through multiple connecting rods. The external thread is divided into a left-hand thread and a right-hand thread. Nuts are installed on both the left-hand thread and the right-hand thread. Each nut is hinged to the two side sub-slot boxes through two connecting rods. A baffle is provided on one side of the sub-box. The nut is hinged to the baffle through a connecting rod. When the linkage device drives the two sub-boxes to approach each other, the two baffles on the two sub-boxes are interlaced or one end of the two baffles are attached together.

[0007] Preferably, the end of the rotating shaft is connected to a drive device; the drive device is a sprocket drive mechanism or a crank handle.

[0008] Preferably, the ventilated mesh installed on the main slot box is divided into two parts, and the two ventilated meshes are connected by an arched baffle, which is located above the rotating shaft; the secondary slot boxes are all equipped with ventilated meshes.

[0009] Preferably, the auxiliary slot box has a hole on the side plate near the linkage device; the main slot box has a sliding groove, and the auxiliary slot box is placed on the sliding groove.

[0010] Preferably, a combustion head cover is fixed on the outer side plate of each auxiliary slot box. A U-shaped groove is cut into the upper part of the combustion head cover, and the U-shaped grooves of the two combustion head covers form an annular opening. The combustion head cover moves synchronously with the auxiliary slot box.

[0011] A burner head includes a main tank box with a feed inlet, multiple igniter ports and air outlets, multiple auxiliary tank boxes and a linkage device inside the main tank box, the linkage device can drive each auxiliary tank box to extend and retract inside the main tank box, and the main tank box and auxiliary tank boxes are provided with breathable mesh. The linkage device includes a rotating shaft connected to the main slot box. The end of the rotating shaft located inside the main slot box has a smooth structure, and two cylinders are sleeved on the rotating shaft. The cylinders are hinged to multiple connecting rods of the linkage device, and the multiple connecting rods are hinged to each auxiliary slot box through nuts. The inner diameter of the two cylinders is larger than the diameter of the rotating shaft, and one of the cylinders is located between the two retaining rings. The retaining rings are fixed on the rotating shaft, and there is a gap between the retaining rings and the cylinder. A baffle is provided on one side of the sub-box. The nut is hinged to the baffle through a connecting rod. When the linkage device drives the two sub-boxes to approach each other, the two baffles on the two sub-boxes are interlaced or one end of the two baffles are attached together.

[0012] Preferably, the driving device is a sprocket drive mechanism or a crank handle.

[0013] Preferably, the ventilated mesh installed on the main slot box is divided into two parts, and the two ventilated meshes are connected by an arched baffle, which is located above the rotating shaft; the secondary slot boxes are all equipped with ventilated meshes.

[0014] Preferably, the auxiliary slot box has a hole on the side plate near the linkage device; the main slot box has a sliding groove, and the auxiliary slot box is placed on the sliding groove.

[0015] Preferably, a combustion head cover is fixed on the outer side plate of each auxiliary slot box. A U-shaped groove is cut into the upper part of the combustion head cover, and the U-shaped grooves of the two combustion head covers form an annular opening. The combustion head cover moves synchronously with the auxiliary slot box.

[0016] This patent can achieve the following beneficial effects: 1. Multiple ignition ports and air inlets increase the stability and completeness of biomass fuel combustion; 2. The auxiliary combustion chamber can extend and retract within the main combustion chamber, expanding the combustion area of ​​the burner head, increasing the contact area between biomass fuel and air, and improving combustion efficiency; this solves the problem of insufficient combustion area of ​​the burner head in the existing technology when the furnace opening size of the tea drying oven is fixed. 3. The linkage device is a combination structure of multiple connecting rods, which is simple in structure, has good stability, and saves costs; 4. The baffle on the auxiliary tank box can not only serve as a connecting body for hinged connection with the linkage device, but also prevent biomass fuel or dust from falling onto the linkage device and affecting its movement. 5. The external threads used in the rotating shaft are divided into left-hand threads and right-hand threads, which can ensure that the force on each rod of the linkage device is uniform, thus making the linkage device move smoothly and less prone to friction. 6. The rotating shaft adopts a smooth structure, which can prevent high temperature damage to the thread teeth, thereby reducing the probability of failure of the linkage device; 7. The combination of the breathable mesh and the secondary slot box structure ensures that air moves vertically upward through the breathable mesh, thereby causing the flame to burn upward. 8. The arched baffle can not only prevent dust from falling into the linkage device, but its arched slope structure can also divert the biomass fuel. That is, after the biomass fuel falls, it will split into two streams and slide onto the ventilation net of the main tank and the auxiliary tank. 9. Using a crank handle as the drive mechanism can reduce manufacturing costs; 10. The U-shaped grooves of the two combustion heads form an annular opening, which has the function of concentrating the heat of the combustion head and dissipating it from the annular opening. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is an overall structural diagram of the present invention when the driving device is a crank handle; Figure 2 This is an overall structural diagram of the drive device of the present invention, which is a sprocket transmission mechanism; Figure 3 This is a structural diagram of the rotating shaft of the present invention using left-hand and right-hand threads in the main slot box, with the vent mesh not installed at this time; Figure 4This is a structural diagram showing the connection between the linkage device and the sprocket transmission mechanism when the rotating shaft of the present invention uses left-hand thread and right-hand thread in the main slot box. Figure 5 This is a structural diagram of the rotating shaft of the present invention having a smooth structure inside the main slot box, with the vent mesh not installed at this time; Figure 6 The rotating shaft of the present invention has a smooth structure inside the main slot box, and the connection structure of the linkage device and the sprocket transmission mechanism is shown in the figure. Figure 7 This is a structural diagram of the main slot box of the present invention; Figure 8 This is a structural diagram of the secondary slot box of the present invention; Figure 9 This is a diagram showing the connection between the breathable mesh and the arched baffle of the present invention; Figure 10 This is a structural diagram of the breathable mesh of the present invention; Figure 11 This is a structural diagram of the combustion head cover of the present invention; Figure 12 This is a structural diagram of the present invention when a combustion hood is added.

[0018] In the diagram: Main tank 1, feed inlet 101, igniter port 102, air outlet 103, chute 104, auxiliary tank 2, baffle 201, linkage device 3, rotating shaft 301, retaining ring 302, ventilation mesh 4, sprocket drive mechanism 5, arched baffle 6, drive device 7, combustion head 8. Detailed Implementation

[0019] Example 1: Preferred solutions include Figures 1 to 3 As shown, it includes a main tank box 1, a feed inlet 101, multiple igniter ports 102 and air outlets 103, a sliding groove 104 and a linkage device 3 inside the main tank box 1, multiple auxiliary tank boxes 2 on the sliding groove 104, and the linkage device 3 drives each auxiliary tank box 2 to connect. The main tank box 1 and the auxiliary tank boxes 2 are provided with a breathable mesh 4. The igniter port 102 can be provided in two or more places, and is located next to the feed port 101; the air outlet 103 can be provided in two or more places, and is located on the side plate of the main slot box 1 near the bottom or on the bottom plate of the main slot box 1. The main slot box 1, the secondary slot box 2, and the breathable mesh 4 can all be made of aluminum alloy with a thickness of 5 to 10 mm; there are two secondary slot boxes 2.

[0020] Preferred solutions include Figure 2 and Figure 3 As shown, the linkage device 3 is a combination structure of multiple connecting rods, and each connecting rod is parallel to the other. The linkage device 3 drives each auxiliary slot box 2 to move in and out of the main slot box 1. The connecting rods can be four in number, forming a four-bar linkage structure.

[0021] The linkage device 3 includes a rotating shaft 301 connected to the main slot box 1. One end of the rotating shaft 301 located inside the main slot box 1 is provided with an external thread, and multiple nuts are installed on the external thread. The nuts are hinged to each auxiliary slot box 2 through multiple connecting rods. The external thread is divided into a left-hand thread and a right-hand thread. Nuts are installed on both the left-hand thread and the right-hand thread. Each nut is hinged to the two side sub-slot boxes 2 by two connecting rods respectively. When the rotating shaft 301 rotates clockwise or counterclockwise, the two nuts fixed to the rod of the linkage device 3 will move in two different directions, thereby realizing the reciprocating motion of the linkage device 3 and the telescopic motion of the auxiliary slot box 2 within the main slot box. During the motion, the connecting rod of the linkage device 3 is subjected to uniform force, which can make the auxiliary slot box 2 move smoothly and with low friction.

[0022] Preferred solutions include Figures 4 to 6 As shown, the driving device 7 is a sprocket transmission mechanism 5.

[0023] In this embodiment, the connection between the rotating shaft 301 and the sprocket transmission mechanism 5 is fixed, which ensures that the rotating shaft 301 and the sprocket transmission mechanism 5 rotate synchronously.

[0024] The main slot box 1 consists of two side plates and a bottom plate, and the rotating shaft 301 passes through the two side plates of the main slot box 1; the secondary slot box 2 is an open rectangular box structure, and a baffle 201 is connected to the side plate of the secondary slot box 2 near the linkage device 3. The baffle 201 has a hole in the center for connecting with the connecting rod of the linkage device 3.

[0025] Preferred solutions include Figure 3 and Figure 4 As shown, a baffle 201 is provided on one side of the sub-box body. The nut is hinged to the baffle 201 through the connecting rod. When the linkage device 3 drives the two sub-box bodies to approach each other, the two baffles 201 on the two sub-box bodies are intersected or one end of the two baffles 201 are attached together. The width of the two side plates of the main slot box 1 is greater than the sum of the fully extended length of the linkage device 3 and the length of the baffles 201 of the two auxiliary slot boxes 2.

[0026] Preferred solutions include Figure 1 , 9 As shown in Figure 10, the breathable mesh 4 installed on the main slot box 1 is divided into two parts, and the two breathable meshes 4 are connected by an arched baffle 6, which is located above the rotating shaft 301; the secondary slot box 2 is also provided with a breathable mesh 4. The arched baffle 6 has a triangular cross-section. After being connected to the breathable net 4, it has sloping sides, which can not only block dust, but also allow biomass fuel to slide to both sides.

[0027] Preferred solutions include Figures 1 to 3 As shown, the end of the rotating shaft 301 is connected to the drive device 7.

[0028] Preferred solutions include Figures 1 to 3 As shown, the driving device 7 is a crank handle.

[0029] Preferred solutions include Figures 1 to 3 and Figures 7 to 10 As shown, the side plate of the auxiliary slot box 2 near the linkage device 3 has a hole; the hole drilled in the side plate of the auxiliary slot box 2 can conduct air between the main slot box 1 and the auxiliary slot box 2.

[0030] Preferred solutions include Figure 1 As shown, the rotating shaft 301 can be made of 1Cr12.

[0031] Example 2: Based on Example 1, a more optimized structure is described below: Preferred solutions include Figure 5 and Figure 6 As shown, the linkage device 3 includes a rotating shaft 301 connected to the main slot box 1. The end of the rotating shaft 301 located inside the main slot box 1 has a smooth structure, and two cylinders are sleeved on the rotating shaft 301. The cylinders are hinged to multiple connecting rods of the linkage device 3, and the multiple connecting rods are hinged to each auxiliary slot box 2 through nuts. The inner diameter of the two cylinders is larger than the diameter of the rotating shaft 301, and one of the cylinders is located between the two retaining rings 302. The retaining rings 302 are fixed on the rotating shaft 301, and there is a gap between the retaining rings 302 and the cylinder. The linkage device 3 structure ensures that one cylinder is fixed to the rotating shaft 301, thereby realizing movement along the direction of extension and retraction of the long rod, while the other cylinder can slide on the rotating shaft 301.

[0032] Preferred solutions include Figure 5 and Figure 6 As shown, the end of the rotating shaft 301 is connected to the drive device 7 via a sprocket transmission mechanism 5; In this embodiment, the sprocket drive mechanism 5 and the rotating shaft 301 are connected by a thread. When the sprocket drive mechanism 5 is in operation, the rotating shaft 301 will move back and forth along the vertical direction of the wheel in the sprocket drive mechanism 5, thereby driving the linkage device 3 to move.

[0033] The design of this linkage device 3 can prevent the linkage device 3 in Embodiment 1 from being damaged in a high-temperature environment, thus reducing the probability of failure of the linkage device 3.

[0034] Example 3: Based on Examples 1 and 2, the optimal structure is described as follows: Preferred solutions include Figure 11 and Figure 12 As shown, each of the auxiliary slot boxes 2 has a combustion head cover 8 fixed on its outer side plate. The upper part of the combustion head cover 8 is chiseled with a U-shaped groove, and the U-shaped grooves of the two combustion head covers 8 form an annular opening. The combustion head cover 8 moves synchronously with the auxiliary slot box 2. The two combustion head covers 8 cover the main slot box 1 and the auxiliary slot box 2. The upper part of the combustion head cover 8 forms an annular opening, which serves as a heat dissipation opening. The two combustion head hoods 8 are different in size but have the same structure. One combustion head hood 8 is proportionally smaller than the other combustion head hood 8 by a certain factor, which we assume to be 0.95 times. This factor is only a reference value and the specific value depends on the width of the material used for the combustion head hood 8, as long as it can ensure that the two combustion head hoods 8 can move in opposite directions. The side plates of the combustion head hood 8 are stepped plates, and the side plates of the two combustion head hoods 8 form a convex space. The convex space is reserved for the ventilation net 4, the arched baffle 6 and the feed inlet 101 to prevent the combustion head hood 8 from colliding with the ventilation net 4 and the arched baffle 6 during movement, and to prevent the feed inlet 101 from being blocked. The combustion head cover 8 has an opening at the bottom of the outer side plate, which can be fixed to the sub-slot box 2 with bolts.

[0035] The working principle of the entire device is as follows: 1. Before use, the combustion head provided by the present invention is operated by rotating the sprocket transmission mechanism 5 to retract the secondary slot box 2 back into the main slot box 1; 2. The burner head enters through the furnace opening of the tea drying oven. Once fully inside, the sprocket transmission mechanism 5 is rotated to fully expand the auxiliary trough box 2, thereby increasing the area of ​​the burner head. 3. After the work is completed, reverse the above steps and retract the burner head.

[0036] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A combustion head, comprising a main tank (1), wherein a feed inlet (101) is provided on the main tank (1), characterized in that: The main slot box (1) is provided with multiple igniter ports (102) and air outlets (103). The main slot box (1) is provided with multiple auxiliary slot boxes (2) and linkage device (3). The linkage device (3) can drive each auxiliary slot box (2) to extend and retract within the main slot box (1). The main slot box (1) and auxiliary slot boxes (2) are provided with breathable mesh (4). The linkage device (3) includes a rotating shaft (301) connected to the main slot box (1). One end of the rotating shaft (301) located inside the main slot box (1) is provided with an external thread. Multiple nuts are installed on the external thread, and the nuts are hinged to each auxiliary slot box (2) through multiple connecting rods. The external thread is divided into left-hand thread and right-hand thread. Nuts are installed on both left-hand thread and right-hand thread. Each nut is hinged to the two side sub-slot boxes (2) by two connecting rods respectively. A baffle (201) is provided on one side of the sub-box. The nut is hinged to the baffle (201) through the connecting rod. When the linkage device (3) drives the two sub-boxes to approach each other, the two baffles (201) on the two sub-boxes are intersected or one end of the two baffles (201) are attached together.

2. A combustion head according to claim 1, characterized in that: The end of the rotating shaft (301) is connected to the drive device (7); the drive device (7) is a sprocket drive mechanism (5) or a crank handle.

3. A combustion head according to claim 2, characterized in that: The main slot box (1) is equipped with a breathable mesh (4) which is divided into two parts. The two breathable meshes (4) are connected by an arched baffle (6), which is located above the rotating shaft (301). The secondary slot box (2) is also equipped with a breathable mesh (4).

4. A combustion head according to claim 3, characterized in that: The auxiliary slot box (2) has a hole on the side plate near the linkage device (3); the main slot box (1) has a sliding groove (104) inside, and the auxiliary slot box (2) is placed on the sliding groove (104).

5. A combustion head according to claim 4, characterized in that: Each of the sub-slot boxes (2) has a combustion head cover (8) fixed on its outer side plate. The upper part of the combustion head cover (8) has a U-shaped groove. The U-shaped grooves of the two combustion head covers (8) form an annular opening. The combustion head cover (8) moves synchronously with the sub-slot box (2).

6. A combustion head, comprising a main tank (1), wherein a feed inlet (101) is provided on the main tank (1), characterized in that: The main slot box (1) is provided with multiple igniter ports (102) and air outlets (103). The main slot box (1) is provided with multiple auxiliary slot boxes (2) and linkage device (3). The linkage device (3) can drive each auxiliary slot box (2) to extend and retract within the main slot box (1). The main slot box (1) and auxiliary slot boxes (2) are provided with breathable mesh (4). The linkage device (3) includes a rotating shaft (301) connected to the main slot box (1). The rotating shaft (301) has a smooth structure at one end inside the main slot box (1), and two cylinders are sleeved on the rotating shaft (301). The cylinders are hinged to multiple connecting rods of the linkage device (3), and the multiple connecting rods are hinged to each auxiliary slot box (2) through nuts. The inner diameter of the two cylinders is larger than the diameter of the rotating shaft (301), and one of the cylinders is located between two retaining rings (302). The retaining rings (302) are fixed on the rotating shaft (301), and there is a gap between the retaining rings (302) and the cylinder. A baffle (201) is provided on one side of the sub-box. The nut is hinged to the baffle (201) through the connecting rod. When the linkage device (3) drives the two sub-boxes to approach each other, the two baffles (201) on the two sub-boxes are intersected or one end of the two baffles (201) are attached together.

7. A combustion head according to claim 6, characterized in that: The end of the rotating shaft (301) is connected to the drive device (7); the drive device (7) is a sprocket drive mechanism (5) or a crank handle.

8. A combustion head according to claim 7, characterized in that: The main slot box (1) is equipped with a breathable mesh (4) which is divided into two parts. The two breathable meshes (4) are connected by an arched baffle (6), which is located above the rotating shaft (301). The secondary slot box (2) is also equipped with a breathable mesh (4).

9. A combustion head according to claim 8, characterized in that: The auxiliary slot box (2) has a hole on the side plate near the linkage device (3); the main slot box (1) has a sliding groove (104) inside, and the auxiliary slot box (2) is placed on the sliding groove (104).

10. A combustion head according to claim 9, characterized in that: Each of the sub-slot boxes (2) has a combustion head cover (8) fixed on its outer side plate. The upper part of the combustion head cover (8) has a U-shaped groove. The U-shaped grooves of the two combustion head covers (8) form an annular opening. The combustion head cover (8) moves synchronously with the sub-slot box (2).

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