Automatic feeding structure of biomass boiler

Abstract

The present application relates to the technical field of boiler feeding, in particular to an automatic feeding structure for a biomass boiler, comprising a moving frame, a conveyor belt arranged on the moving frame, a guide mechanism arranged on the left side of the moving frame for guiding the falling materials, and a distributing mechanism arranged in the middle of the moving frame for uniformly distributing the materials on the conveyor belt, wherein the excess materials on the conveyor belt are scraped by the cooperation of the material accumulation plate and the V-shaped scraping piece, the weight of the materials is continuously monitored by the integrated gravity sensor on the conveyor belt, the excess materials scraped are moved to the position with less materials on the conveyor belt by the feeding assembly for replenishment, and the materials on the conveyor belt are uniformly distributed in the transverse direction. In addition, the falling materials on the conveyor belt are guided and constrained by the telescopic cylinder, the random drifting of the materials during the falling process is inhibited, and thus the uniformity of the distribution of the materials on the feeding chain plate of the boiler is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of boiler feeding technology, specifically an automatic feeding structure for a biomass boiler. Background Technology

[0002] Biomass boilers, as a type of clean energy equipment that uses renewable biomass resources such as crop straw, forestry waste, wood chips, and rice husks as fuel, have been widely used in the fields of heating and power generation. To achieve continuous and stable operation of the boiler, an automatic feeding system is an indispensable component.

[0003] Currently, common automatic feeding methods include screw conveyor feeding and belt conveyor feeding. For large biomass boilers, belt conveyor spreaders (also known as throwing machines) are usually used as feeding equipment: biomass raw materials are transported to the discharge port of the throwing machine via the conveyor belt. The throwing machine moves back and forth along the width direction above the boiler feed hopper, throwing the raw materials onto the conveyor belt (or grate) of the boiler, and then the conveyor belt sends the raw materials into the furnace for combustion.

[0004] During the operation of large biomass boilers, the uniform distribution of fuel on the conveyor belt directly affects the boiler's combustion efficiency, operational stability, and emission standards. Fuel evenly distributed on the conveyor belt can fully contact the primary and secondary air to achieve complete combustion, effectively ensuring the boiler's thermal efficiency. Conversely, if the fuel is unevenly distributed on the conveyor belt, local accumulation areas will experience incomplete combustion due to lack of oxygen, resulting not only in fuel waste and reduced thermal efficiency but also in the production of large amounts of black smoke and harmful gases. Areas with sparse fuel will lead to wasted grate space, localized overheating, and even damage to the grate equipment.

[0005] However, existing feeders have two prominent technical problems in practical applications. First, due to the irregular shape and large density difference of biomass raw materials, they are prone to local accumulation or idling on the conveyor belt during the conveying process, resulting in uneven material quantity in different areas of the belt. Under these circumstances, even if the feeder moves back and forth on the boiler feed hopper, the amount of material thrown to different areas of the conveyor belt per unit time is still inconsistent, making it difficult to fundamentally improve the uniformity of material distribution on the conveyor belt.

[0006] Secondly, there is a certain height difference between the discharge port of the feeder and the conveyor belt of the boiler. During the process of biomass raw materials falling from the discharge port to the conveyor belt, due to the low density and large specific surface area of ​​biomass raw materials, they are significantly affected by air resistance. The raw material particles will drift randomly, resulting in an uncontrollable falling trajectory, which further deteriorates the uniformity of the distribution of raw materials on the conveyor belt.

[0007] The combination of these two problems makes it difficult for existing material feeders to achieve the desired uniform material distribution effect, which seriously restricts the operating efficiency and environmental performance of large biomass boilers. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an automatic feeding structure for a biomass boiler, including a movable frame, a conveyor belt on the movable frame, a guiding mechanism for guiding the falling material on the left side of the movable frame, and a material distribution mechanism for evenly distributing the material on the conveyor belt in the middle of the movable frame.

[0009] The guiding mechanism includes a telescopic cylinder located on the left side of the movable frame. The feed inlet at the top of the telescopic cylinder corresponds to the lower part of the conveyor belt discharge point. When feeding, the telescopic cylinder extends downward to the feed chain plate of the boiler, thereby guiding the material falling up and down on the conveyor belt.

[0010] The fabric feeding mechanism includes a support frame fixedly installed on a movable frame. Two material gathering plates are fixedly installed on the support frame and arranged symmetrically in front and behind. V-shaped scrapers are provided on the material gathering plates through a lifting component. The V-shaped scrapers are provided with a replenishing component for collecting excess material on the conveyor belt and reusing it.

[0011] The conveyor belt is equipped with a gravity sensor. When the boiler is being fed, the conveyor belt continuously monitors the weight of the material on it. The material gathering plate gathers the material to the middle of the conveyor belt. The V-shaped scraper removes excess material from the conveyor belt and moves the excess material to a thinner section of the conveyor belt through the feeding component.

[0012] Preferably, the telescopic cylinder is composed of several nested square cylinders, with adjacent square cylinders slidingly connected to each other vertically, and the outermost square cylinder being fixedly connected to the movable frame.

[0013] Preferably, a limiting block is provided on the inner side of the square tube, and a sliding groove is provided on the outer side of the square tube for the limiting block to slide. Each square tube except the outermost square tube is provided with a frame on its lower side to push the adjacent square tube on its outer side upward.

[0014] Preferably, several sets of inverted V-shaped plates are detachably slidably inserted inside the innermost square tube, and the multiple sets of inverted V-shaped plates perform multiple diversions, collisions and redistributions of the falling fuel.

[0015] Preferably, a drum is rotatably mounted on the movable frame, and a steel wire rope fixedly connected to the innermost square tube is wound on the drum. A synchronous motor for driving the drum is fixedly installed on the movable frame.

[0016] Preferably, the lifting assembly includes a lifting frame that is vertically slidably connected to the support frame, the lifting frame being fixedly connected to a V-shaped scraper, and a hydraulic cylinder for driving the lifting frame being fixedly installed on the support frame.

[0017] Preferably, the feeding assembly includes two chutes fixedly installed on the right side of the V-shaped scraper and arranged symmetrically, and a hopper fixedly installed on the left side of the V-shaped scraper.

[0018] Preferably, a conveying cylinder is fixedly connected to the end of the chute, and a screw rod is rotatably installed inside the conveying cylinder.

[0019] Preferably, an excitation motor for driving a screw is fixedly installed on the upper side of the conveying cylinder, and the material is slid into the hopper through an inclined tube structure at the upper part of the conveying cylinder.

[0020] Preferably, a discharge plate is rotatably installed inside the hopper, and a geared motor for driving the discharge plate is fixedly installed on the outside of the hopper.

[0021] The beneficial effects of this invention are as follows: First, this invention uses a material-collecting plate and a V-shaped scraper to scrape off excess material on the conveyor belt. At the same time, the weight of the material is continuously monitored by a gravity sensor integrated on the conveyor belt. The scraped excess material is moved to a position on the conveyor belt with less material by a replenishment component to replenish it, ensuring that the material on the conveyor belt is evenly distributed laterally. In addition, the telescopic cylinder guides and constrains the material falling up and down the conveyor belt, suppressing the random scattering of material during the drop process, thereby effectively improving the uniformity of material distribution on the boiler feeding chain plate.

[0022] II. This invention employs a telescopic cylinder, whose overall height can be adjusted, to guide the falling material. The telescopic cylinder consists of several nested square cylinders. When the lower side of the innermost square cylinder approaches the boiler's feeding chain plate, the falling material is directly laid on the boiler's feeding chain plate along the length of the telescopic cylinder wall, significantly suppressing the random drifting of the material caused by air resistance. At the same time, through multiple sets of detachable and sliding inverted V-shaped plates inside the innermost square cylinder, the fuel during the falling process is diverted, collided, and redistributed multiple times, so that the material is initially uniformly dispersed before falling into the feeding chain plate, further improving the uniformity of the material laid on the boiler's feeding chain plate.

[0023] Third, this invention employs two symmetrically arranged material-gathering plates to push and collect the material on the conveyor belt towards the center. When there is a large amount of material on the conveyor belt, the material pushed by the material-gathering plates forms a high material pile in the middle of the conveyor belt, which facilitates the V-shaped scraper to push away the excess material that is higher than the predetermined height, thus achieving precise removal of a large amount of material. At the same time, the scraped excess material enters the conveying cylinder through two symmetrically arranged chutes fixedly installed on the right side of the V-shaped scraper. The excess material is then conveyed upward by the spiral rod inside the conveying cylinder and slid through the inclined tube structure to the hopper on the left side of the V-shaped scraper for temporary storage. Then, the discharge plate, which is rotated inside the hopper, releases an appropriate amount of material quantitatively to the position on the conveyor belt where there is less material, thereby achieving closed-loop regulation of uniform material distribution on the conveyor belt. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the movable frame, square tube, drum and wire rope in this invention;

[0027] Figure 3 This is a partial sectional view of the square tube, drum, wire rope and synchronous motor of the present invention;

[0028] Figure 4 This is a cross-sectional view of the square tube in the present invention when it is contracted;

[0029] Figure 5 This is a schematic diagram of the structure of the material-gathering plate, conveying cylinder, silo, and excitation motor in this invention;

[0030] Figure 6 This is a schematic diagram of the structure of the V-shaped scraper, hopper, screw rod and lifting frame in this invention;

[0031] Figure 7 This is a partial cross-sectional view of the hopper, geared motor, and discharge plate in this invention.

[0032] In the diagram: 1. Moving frame; 2. Guiding mechanism; 3. Fabric feeding mechanism; 11. Conveyor belt; 21. Telescopic drum; 31. Bearing frame; 32. Material gathering plate; 33. Lifting assembly; 34. V-shaped scraper; 35. Material replenishment assembly; 211. Square tube; 212. Inverted V-shaped plate; 213. Drum; 214. Steel wire rope; 215. Synchronous motor; 331. Lifting frame; 332. Hydraulic cylinder; 351. Chute; 352. Hopper; 353. Conveying drum; 354. Screw rod; 355. Excitation motor; 356. Discharge plate; 357. Gear motor. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0034] See Figure 1 , Figure 2 , Figure 3 and Figure 5An automatic feeding structure for a biomass boiler includes a movable frame 1, a conveyor belt 11 mounted on the movable frame 1, a guiding mechanism 2 for guiding the falling material on the left side of the movable frame 1, and a material distribution mechanism 3 for evenly distributing the material on the conveyor belt 11 in the middle of the movable frame 1.

[0035] When it is necessary to evenly distribute materials on the boiler chain plate, the conveyor belt 11 rotates continuously, thereby continuously conveying materials to the left. At the same time, the moving frame 1 moves back and forth, and the guide mechanism 2 extends into the boiler's feeding port, so that the materials conveyed to the left side of the conveyor belt 11 continuously fall down along the guide mechanism 2 onto the boiler chain plate, thereby spreading the materials back and forth along the width of the boiler chain plate, thus ensuring that the materials on the boiler chain plate are evenly distributed and effectively guaranteeing the boiler's thermal efficiency.

[0036] During the continuous material transport process of the conveyor belt 11, the weight of the material on the conveyor belt 11 is monitored in real time by the material distribution mechanism 3, and excess material on the conveyor belt 11 is scraped off. The scraped material is collected in one place, and then the collected excess material is scattered on the conveyor belt 11 in areas with less material, so that the amount of material at each point on the conveyor belt 11 is close to uniform, and the material is evenly distributed on the conveyor belt 11.

[0037] During the process of the material on the conveyor belt 11 falling onto the boiler chain plate along the guide mechanism 2, the guide mechanism 2 guides and constrains the falling material, suppressing the random scattering of the material during the drop process, thereby effectively improving the uniformity of the material distribution on the boiler feeding chain plate.

[0038] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The guiding mechanism 2 includes a telescopic cylinder 21 located on the left side of the movable frame 1. The feed inlet at the top of the telescopic cylinder 21 corresponds to the lower part of the discharge point of the conveyor belt 11. The telescopic cylinder 21 extends downward to the feeding chain plate of the boiler. During feeding, the conveyor belt 11 continuously transports the material to the feed inlet of the telescopic cylinder 21, so that the falling material always moves inside the telescopic cylinder 21, thereby guiding the falling material and effectively preventing the material from randomly scattering during the falling process. The reciprocating movable frame 1 drives the telescopic cylinder 21 to repeatedly lay the material along the width direction of the boiler chain plate.

[0039] See Figure 1 , Figure 5 and Figure 6The fabric feeding mechanism 3 includes a support frame 31 fixedly installed on the movable frame 1. Two material gathering plates 32 are fixedly installed on the support frame 31 and arranged symmetrically in front and behind. A V-shaped scraper 34 is provided on the material gathering plate 32 through a lifting component 33. A replenishing component 35 is provided on the V-shaped scraper 34 to collect excess material on the conveyor belt 11 and reuse it.

[0040] Continue reading Figure 1 , Figure 5 and Figure 6 The conveyor belt 11 is equipped with a gravity sensor. When the boiler is being fed, the conveyor belt 11 continuously monitors the weight of the material on it and transmits the monitored data to the host computer in real time. The host computer then controls the V-shaped scraper 34 to move up and down in real time through the lifting component 33 based on this data.

[0041] When the conveyor belt 11 conveys material to the position of the material gathering plate 32, the material gathering plate 32 gathers the material to the middle of the conveyor belt 11. When the material on the conveyor belt 11 exceeds the specified amount, the height of the material pile after being gathered by the material gathering plate 32 exceeds the specified value. Then the gathered material moves to the position of the V-shaped scraper 34, so that the V-shaped scraper 34 pushes the excess material that is higher than the predetermined height away into the feeding component 35, thereby achieving precise removal of a large amount of material.

[0042] When the gravity sensor detects that the material on the conveyor belt 11 is less than a specified value, the feeding component 35 moves the excess material to a position on the conveyor belt 11 where there is less material, thereby reducing excess material and replenishing insufficient material on the conveyor belt 11, and thus making the material on the conveyor belt 11 evenly distributed.

[0043] To enable the telescopic cylinder 21 to guide and constrain the material during its descent, the present invention designs the following structure: (See attached diagram) Figure 1 , Figure 2 , Figure 3 and Figure 4 The telescopic cylinder 21 is composed of several nested square cylinders 211. Adjacent square cylinders 211 are slidably connected to each other. The outermost square cylinder 211 is fixedly connected to the moving frame 1. When the material is moved to the boiler chain plate, the lowermost square cylinder 211 extends out, so that the other square cylinders 211 except the outermost square cylinder 211 automatically move down under the action of gravity, thereby extending the overall length of the telescopic cylinder 21, and thus causing the innermost square cylinder 211 to move down and approach the boiler chain plate.

[0044] To prevent the square tubes 211 from slipping off each other and to allow for flexible adjustment of the length of the telescopic tube 21, the present invention designs the following structure: (See attached diagram) Figure 2 , Figure 3 and Figure 4A limiting block is provided on the inner side of the square tube 211, and a sliding groove is provided on the outer side of the square tube 211 for the limiting block to slide. Each square tube 211 except the outermost square tube 211 has a frame on its lower side that pushes the adjacent square tube 211 on its outer side upward. A drum 213 is rotatably mounted on the moving frame 1. A steel wire rope 214 fixedly connected to the innermost square tube 211 is wound on the drum 213. A synchronous motor 215 that drives the drum 213 is fixedly installed on the moving frame 1.

[0045] When the telescopic cylinder 21 is extended, the synchronous motor 215 drives the drum 213 to rotate, thereby releasing the wire rope 214. This causes the square cylinders 211, except for the outermost square cylinder 211, to move downward under the action of gravity. When the corresponding square cylinder 211 slides to its upper groove and abuts against the corresponding limit block, the square cylinder 211 stops moving downward. This achieves the sequential downward movement of the square cylinders 211, thereby achieving the overall extension of the telescopic cylinder 21.

[0046] When the telescopic drum 21 is retracted, the synchronous motor 215 drives the drum 213 to rotate, thereby winding the wire rope 214. This causes the wire rope 214 to pull the innermost square drum 211 upward. When the innermost square drum 211 abuts against the corresponding square drum 211 through its upper frame, both square drums 211 move upward simultaneously. This process is repeated to achieve the overall retraction of the telescopic drum 21. At this time, it is convenient to remove the moving frame 1 from the upper part of the boiler's chain plate for easy cleaning of the boiler.

[0047] To achieve the guiding and uniform distribution of falling materials by the telescopic cylinder 21, the present invention designs the following structure: (See attached diagram) Figure 3 and Figure 4 The innermost square tube 211 contains several sets of inverted V-shaped plates 212 that can be detachably slidably inserted. The sets of inverted V-shaped plates 212 are staggered with each other, so that the multiple sets of inverted V-shaped plates 212 can divert, collide and redistribute the falling fuel multiple times, thereby achieving uniform distribution of the falling material.

[0048] To achieve flexible adjustment of the material quantity on the conveyor belt 11, the present invention designs the following structure: (See attached diagram) Figure 1 , Figure 5 , Figure 6 and Figure 7 The lifting assembly 33 includes a lifting frame 331 that is vertically slidably connected to the support frame 31. The lifting frame 331 is fixedly connected to the V-shaped scraper 34. A hydraulic cylinder 332 that drives the lifting frame 331 is fixedly installed on the support frame 31.

[0049] The lifting frame 331 is driven up and down by the hydraulic cylinder 332 in advance, so that the lifting frame 331 drives the V-shaped scraper 34 to move synchronously, thereby changing the height of the material pile scraped by the V-shaped scraper 34 and realizing the flexible removal of a large amount of material.

[0050] To collect the material pushed away by the V-shaped scraper 34, the present invention designs the following structure: (Continue reading) Figure 1 , Figure 5 , Figure 6 and Figure 7 The feeding assembly 35 includes two chutes 351 fixedly installed on the right side of the V-shaped scraper 34 and arranged symmetrically. A hopper 352 is fixedly installed on the left side of the V-shaped scraper 34. A conveying cylinder 353 is fixedly connected to the end of the chutes 351. A screw rod 354 is rotatably installed inside the conveying cylinder 353. An excitation motor 355 that drives the screw rod 354 is fixedly installed on the upper side of the conveying cylinder 353. The material is slid into the hopper 352 through an inclined tube structure at the upper part of the conveying cylinder 353.

[0051] Excess material scraped off by the V-shaped scraper 34 enters the conveying cylinder 353 through two symmetrically arranged chutes 351 fixedly installed on the right side of the V-shaped scraper 34. The excitation motor 355 drives the screw rod 354 to rotate continuously, so that the screw rod 354 in the conveying cylinder 353 conveys the excess material upward and slides through the inclined tube structure to the hopper 352 on the left side of the V-shaped scraper 34 for temporary storage, thereby completing the collection of excess material.

[0052] To ensure that excess material is scattered onto a less congested section of the conveyor belt 11, the present invention designs the following structure: (See attached diagram) Figure 5 , Figure 6 and Figure 7 A discharge plate 356 is rotatably installed inside the hopper 352, and a reduction motor 357 for driving the discharge plate 356 is fixedly installed on the outside of the hopper 352. In this embodiment, based on the speed of the conveyor belt 11 and the monitoring of the weight of the material by the gravity sensor on the conveyor belt 11, when the position with less material on the conveyor belt 11 moves to directly below the hopper 352, the reduction motor 357 is activated according to the specific weight of the material on the conveyor belt 11 at that position.

[0053] The geared motor 357 drives the discharge plate 356 to rotate, and the discharge plate 356 moves an appropriate amount of material from the upper part of the hopper 352 to the lower part, thereby releasing an appropriate amount of material quantitatively to the position on the conveyor belt 11 where there is less material, thus achieving closed-loop regulation of uniform material distribution on the conveyor belt 11.

[0054] In summary, compared with traditional feeding machines, this invention adds components such as telescopic cylinder 21, material gathering plate 32, V-shaped scraper 34 and replenishment component 35 to the conventional feeding structure, which to some extent increases the initial manufacturing cost and system complexity of the equipment. However, by accurately replenishing excess material to the weak position of the material, this invention realizes a closed-loop system of more removal and less replenishment of material on the conveyor belt 11, which can significantly improve the uniformity of the lateral and longitudinal distribution of biomass fuel on the boiler conveyor chain plate.

[0055] Therefore, the fuel can fully contact the primary and secondary air to achieve complete combustion, effectively avoiding incomplete combustion caused by local accumulation and wasted grate area caused by local idling. This significantly improves boiler thermal efficiency, reduces fuel consumption and harmful gas emissions, and reduces the frequency of equipment maintenance caused by local overheating of the grate. In practical engineering applications, the fuel cost savings, reduced equipment maintenance costs, and environmental compliance benefits brought about by the above comprehensive benefits can cover the investment cost of the new structure in a short period of time after the equipment is put into operation. This makes the invention have outstanding economic practicality and industrial promotion and application value.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic feeding structure for a biomass boiler, comprising a movable frame and a conveyor belt mounted on the movable frame, characterized in that, A guiding mechanism for guiding falling materials is provided on the left side of the mobile frame, and a material distribution mechanism for evenly distributing materials on the conveyor belt is provided in the middle of the mobile frame. The guiding mechanism includes a telescopic cylinder located on the left side of the movable frame. The feed inlet at the top of the telescopic cylinder corresponds to the lower part of the conveyor belt discharge point. When feeding, the telescopic cylinder extends downward to the feed chain plate of the boiler, thereby guiding the material falling up and down on the conveyor belt. The fabric feeding mechanism includes a support frame fixedly installed on a movable frame. Two material gathering plates are fixedly installed on the support frame and arranged symmetrically in front and behind. V-shaped scrapers are provided on the material gathering plates through a lifting component. A replenishing component is provided on the V-shaped scrapers to collect excess material on the conveyor belt and reuse it. The conveyor belt is equipped with a gravity sensor. When the boiler is being fed, the conveyor belt continuously monitors the weight of the material on it. The material gathering plate gathers the material to the middle of the conveyor belt. The V-shaped scraper removes excess material from the conveyor belt and moves the excess material to a thinner section of the conveyor belt through the feeding component.

2. The automatic feeding structure for a biomass boiler according to claim 1, characterized in that, The telescopic cylinder is composed of several nested square tubes, with adjacent square tubes sliding vertically connected to each other, and the outermost square tube fixedly connected to the moving frame.

3. The automatic feeding structure for a biomass boiler according to claim 2, characterized in that, The inner side of the square tube is provided with a limiting block, and the outer side of the square tube is provided with a sliding groove for the limiting block to slide. Except for the outermost square tube, each square tube has a frame on its lower side that pushes the adjacent square tube on its outer side upward.

4. The automatic feeding structure for a biomass boiler according to claim 2, characterized in that, The innermost square tube contains several sets of inverted V-shaped plates that can be detachably slidably inserted. These multiple sets of inverted V-shaped plates divert, collide, and redistribute the falling fuel multiple times.

5. The automatic feeding structure for a biomass boiler according to claim 2, characterized in that, A drum is rotatably mounted on the mobile frame, and a steel wire rope fixedly connected to the innermost square tube is wound on the drum. A synchronous motor that drives the drum is fixedly installed on the mobile frame.

6. The automatic feeding structure for a biomass boiler according to claim 1, characterized in that, The lifting assembly includes a lifting frame that is vertically slidably connected to a support frame. The lifting frame is fixedly connected to a V-shaped scraper. A hydraulic cylinder that drives the lifting frame is fixedly installed on the support frame.

7. The automatic feeding structure for a biomass boiler according to claim 1, characterized in that, The feeding assembly includes two chutes that are fixedly installed on the right side of the V-shaped scraper and arranged symmetrically, and a hopper is fixedly installed on the left side of the V-shaped scraper.

8. The automatic feeding structure for a biomass boiler according to claim 7, characterized in that, A conveying cylinder is fixedly connected to the end of the chute, and a screw rod is rotatably installed inside the conveying cylinder.

9. The automatic feeding structure for a biomass boiler according to claim 8, characterized in that, An excitation motor for driving the screw is fixedly installed on the upper side of the conveying cylinder, and the material is slid into the hopper through an inclined tube structure at the top of the conveying cylinder.

10. The automatic feeding structure for a biomass boiler according to claim 7, characterized in that, The hopper is equipped with a rotating discharge plate, and a geared motor that drives the discharge plate is fixedly installed on the outside of the hopper.

Images