A biomass pellet fuel metering and feeding device

Abstract

This utility model discloses a biomass pellet fuel metering and feeding device, belonging to the technical field of biomass pellet fuel feeding equipment. It includes a storage tank with a feeding chamber at its lower part. A sleeve rotatably connected to the feeding chamber passes through the feeding chamber along its axis, spaced apart from the bottom surface of the feeding chamber. The sleeve has vertically arranged partitions, and multiple partitions are evenly arranged circumferentially around its surface. An adjusting rod threadedly connected to the sleeve passes through it, with its bottom end extending below the bottom of the sleeve. A fixing ring rotatably connected to the bottom end of the adjusting rod is provided, and a feeding plate is mounted on the fixing ring. The feeding plate, adjacent partitions, and the inner wall of the feeding chamber enclose a feeding compartment. Rotating the adjusting rod causes the feeding plate to move axially, synchronously adjusting the volume of each feeding compartment. This utility model effectively reduces operating steps and ensures consistent volume in all feeding compartments, guaranteeing the accuracy of subsequent feeding.

Description

Technical Field

[0001] This utility model belongs to the technical field of biomass pellet fuel feeding equipment, and specifically relates to a biomass pellet fuel metering and feeding device. Background Technology

[0002] The essence of biomass pellet fuel is the efficient utilization of renewable biomass resources. It transforms the originally scattered and low-density agricultural and forestry waste (such as straw and sawdust) into pellets with uniform shape and high energy density, solving the problems of inconvenient transportation and low combustion efficiency of traditional biomass fuels.

[0003] The core principle of adjusting the feed rate in a biomass pellet combustion furnace is "on-demand supply," which involves flexibly adjusting the feed rate based on temperature requirements, environmental changes, and equipment load. This ensures optimal performance while conserving fuel, protecting equipment, and avoiding unnecessary wear and tear. For example, when heating is needed, the feed rate is increased to quickly replenish heat; once the target temperature is reached, the feed rate is reduced to maintain the required basic heat output. Therefore, biomass pellet fuel feeding equipment must have an adjustable feed rate function.

[0004] Existing technology, Chinese utility model patent (CN217699063U), discloses a novel fuel proportioning and feeding device for sintering, including a feeding chamber with a feed inlet at the top and a discharge outlet at the bottom. A feeding rotary drum is located at the bottom of the feeding chamber, and a feeding trough is formed on the rotary drum. An adjusting component is installed in the feeding trough to adjust its volume. When the adjusting component controls the telescopic shaft to move the receiving plate and the movable plate upwards, the ejector spring pushes the movable plate to open to both sides until the side of the movable plate contacts the side wall of the feeding trough, at which point the volume of the feeding trough decreases. Conversely, when the telescopic shaft is shortened, the volume of the feeding trough increases.

[0005] The aforementioned existing technology involves multiple independent feeding troughs on the feeding drum, each requiring a separate adjustment component. When the feeding volume needs to be adjusted to suit different working conditions, the operator must operate the adjustment component in each trough individually. This process is cumbersome, time-consuming, and labor-intensive, increasing the operator's workload. Furthermore, differences in the adjustment precision of different feeding troughs can lead to inconsistencies in the actual volume of each trough, causing fluctuations in the feeding rate. Utility Model Content

[0006] The purpose of this invention is to provide a biomass pellet fuel metering and feeding device, which aims to solve the problem of the need for separate adjustment of the feed trough volume and the cumbersome operation in the above-mentioned background technology.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A biomass pellet fuel metering and feeding device includes a storage tank with a feeding chamber at its lower part. A sleeve rotatably connected to the feeding chamber passes through the feeding chamber along its axis. The sleeve is spaced apart from the bottom surface of the feeding chamber. A partition is provided vertically on the sleeve. Multiple partitions are evenly arranged around the surface of the sleeve. An adjusting rod threadedly connected to the sleeve passes through the sleeve. The bottom end of the adjusting rod extends to below the bottom of the sleeve, and a fixing ring rotatably connected to the bottom end of the adjusting rod is provided. A feeding plate is provided on the fixing ring. The feeding plate, adjacent partitions, and the inner wall of the feeding chamber enclose a feeding compartment. Rotating the adjusting rod causes the feeding plate to move axially to synchronously adjust the volume of each feeding compartment.

[0008] Furthermore, the top end of the sleeve extends above the storage tank, the top end of the adjusting rod extends above the top end of the sleeve, and the adjusting rod and the sleeve are fixed by a positioning pin.

[0009] Furthermore, the feeding plate is inclined, and the high end of the feeding plate is connected to the support ring.

[0010] Furthermore, a baffle is provided vertically at the high end of the feeding plate, and the upper edge of the baffle is located above the bottom of the sleeve. The baffle is slidably engaged with the sleeve and the two side partitions respectively.

[0011] Furthermore, the storage tank is provided with a storage cavity, which is located above and communicates with the feeding cavity, and the sleeve inside the storage cavity is provided with a crossbar that is vertically connected to it.

[0012] Furthermore, the top of the storage tank is equipped with a motor, the output shaft of the motor is equipped with a gear, and the sleeve is correspondingly equipped with a gear ring that meshes with the gear.

[0013] Furthermore, the adjusting rod located above the sleeve is provided with a positioning ring plate, on which first positioning holes are evenly opened around its circumference, and a second positioning hole is opened correspondingly on the top surface of the sleeve, and the connected first positioning hole and second positioning hole are fixed by a positioning pin.

[0014] Compared with the shortcomings and deficiencies of the existing technology, the present invention has the following beneficial effects: This invention provides a biomass pellet fuel metering and feeding device. The adjusting rod is threadedly connected to the sleeve. Simply rotating the adjusting rod causes it to move axially, and the fixed ring at the bottom rotates, causing all feeding plates to rise and fall synchronously. This eliminates the need for individual adjustment of each feeding compartment, allowing for a one-time change of the volume of all feeding compartments. Compared to existing technologies, this invention effectively reduces operating steps and ensures consistent volume across all feeding compartments, preventing fluctuations in feeding volume due to adjustments in individual compartments and guaranteeing the accuracy of subsequent feeding.

[0015] The sleeve inside the storage chamber is equipped with a vertically connected crossbar. When the sleeve drives the crossbar to rotate, the crossbar agitates the biomass pellet fuel inside the storage chamber. This effectively breaks the "arch bridge effect," or "bridging" phenomenon, formed by the accumulation of biomass pellet fuel.

[0016] The feeding plate is inclined, allowing biomass pellet fuel to slide quickly down the inclined plate surface under gravity to complete the feeding. At the same time, the baffle at the high end of the feeding plate is vertically set, and its upper end is always above the bottom of the sleeve. It slides and cooperates with the sleeve and the side partitions, which can effectively prevent biomass pellet fuel from entering the gap between the feeding plate and the sleeve, and prevent the equipment from jamming. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the biomass pellet fuel metering and feeding device of this utility model.

[0018] Figure 2 This is a side view of the biomass pellet fuel metering and feeding device of this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the sleeve and adjusting rod in this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the adjusting rod with a fixing ring and a feeding plate at the bottom.

[0021] Figure 5 yes Figure 2 A schematic diagram of the cross-sectional structure at point CC.

[0022] Figure 6 yes Figure 2 Schematic diagram of the cross-sectional structure at point BB.

[0023] Figure 7 yes Figure 2 A schematic diagram of the cross-sectional structure at point DD.

[0024] In the diagram: 100, storage tank; 101, feed inlet; 102, feeding port; 110, storage chamber; 120, feeding chamber; 130, fixing plate; 131, discharge port; 200, metering and feeding mechanism; 210, sleeve; 211, partition; 212, crossbar; 213, gear ring; 220, adjusting rod; 221, fixing ring; 222, feeding plate; 223, baffle; 224, positioning ring plate; 225, first positioning hole; 226, positioning pin; 227, rotating part; 230, feeding compartment; 300, motor; 301, dustproof box; 302, gear. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] Reference Figure 1 and Figure 2 This utility model discloses a biomass pellet fuel metering and feeding device, including a storage tank 100, which stores biomass pellet fuel and is used to feed biomass pellet fuel into a biomass pellet combustion furnace.

[0027] Reference Figure 5 and 6 A fixing plate 130 is provided inside the storage tank 100 along the vertical axis, dividing the storage tank 100 into a storage chamber 110 and a feeding chamber 120. A discharge port 131 is provided on the fixing plate 130 to introduce biomass fuel from the storage chamber 110 into the feeding chamber 120. A feed inlet 101 is provided at the top of the storage chamber 110. The feeding chamber 120 is cylindrical, and a feeding port 102 is provided on the side wall of the feeding chamber 120.

[0028] A sleeve 210 is inserted through the storage tank 100 along its axis. The upper end of the sleeve 210 is located above the top of the storage tank 100, and the lower end is inserted into the feeding chamber 120, with a certain distance between the end and the bottom surface of the feeding chamber 120 (see reference). Figure 7 The sleeve 210 located inside the feeding chamber 120 is provided with partitions 211. The partitions 211 are arranged vertically and slide against the inner wall of the feeding chamber 120. Multiple partitions 211 are evenly distributed around the circumference of the sleeve 210, and the spacing between adjacent partitions 211 is adapted to the width of the feeding port 102. In this embodiment, there are four partitions 211. The sleeve 210 is rotatably connected to the baffle 223 and the top of the storage tank 100. The top of the storage tank 100 is provided with a motor 300, and the output shaft of the motor 300 is provided with a gear 302. The sleeve 210 located outside the storage tank 100 is fitted with a gear ring 213, and the gear 302 meshes with the gear ring 213 for transmission. A dustproof box 301 is installed on the top of the storage tank 100, and the dustproof box 301 covers the gear 302 and the gear ring 213 inside it. The sleeve 210 is rotatably connected with the dustproof box 301. The motor 300 can be implemented using a stepper motor or a servo motor. The precise rotation of the sleeve 210 is achieved by controlling the start, stop and speed of the motor 300.

[0029] Reference Figure 3 and Figure 4An adjusting rod 220, threadedly connected to the sleeve 210, is inserted inside the sleeve 210. This connection can be achieved using a combination of external and internal threads. Rotating the adjusting rod 220 drives its axial displacement. The bottom end of the adjusting rod 220 extends below the bottom of the sleeve 210. A retaining ring 221 is rotatably connected to the bottom end of the adjusting rod 220. The retaining ring 221 can specifically employ a rotary connection structure with ball bearings. The retaining ring 221 is fixedly connected to a feeding plate 222, which is located between adjacent baffles 223. The two side edges of the feeding plate 222 are respectively connected to the two side baffles 223. 23. Sliding fit: The outer edge of the feeding plate 222 slides into the inner wall of the feeding chamber 120. The feeding plate 222, the adjacent partition 211, and the inner wall of the feeding chamber 120 enclose the feeding compartment 230. Multiple feeding compartments 230 are provided in the feeding chamber 120. The adjusting rod 220 moves axially. The adjusting rod 220 drives each feeding plate 222 to move synchronously through the fixing ring 221, thereby synchronously adjusting the volume of each feeding compartment 230. The distance between the fixing ring 221 and the bottom of the sleeve 210 is the adjustment range of the volume of the feeding compartment 230.

[0030] The top of the adjusting rod 220 extends above the top of the sleeve 210. The top of the adjusting rod 220 is provided with a rotating part 227, which is used to drive the adjusting rod 220 to rotate, thereby adjusting the volume of the feeding chamber 230. The adjusting rod 220 located outside the sleeve 210 is provided with a positioning ring plate 224. Multiple first positioning holes 225 are evenly distributed around the positioning ring plate 224. Multiple second positioning holes are evenly distributed around the bottom surface of the sleeve 210. The first positioning holes 225 and the second positioning holes are aligned and connected, and a positioning pin 226 passes through them. Through the cooperation with the positioning pin 226, a mechanical interlock is formed to limit the relative displacement between the adjusting rod 220 and the sleeve 210.

[0031] In one embodiment, the feeding plate 222 is inclined, and the high end of the feeding plate 222 is connected to the fixing ring 221, so that the biomass pellet fuel slides naturally down the inclined surface under the action of gravity, which facilitates the rapid discharge of the biomass pellet fuel along the feeding port 102.

[0032] In one embodiment, the upper end of the feeding plate 222 is vertically fixed to a baffle 223. The upper edge of the baffle 223 is always higher than the bottom end of the sleeve 210, which can prevent material from entering the gap between the feeding plate 222 and the sleeve 210. The baffle 223 is slidably engaged with the side partitions 211 and the sleeve 210 respectively, ensuring that the baffle 223 maintains a tight fit of the contact surface when it moves axially during the adjustment process.

[0033] In one embodiment, the sleeve 210 inside the storage chamber 110 is provided with a crossbar 212 perpendicular to it. Multiple crossbars 212 are evenly distributed around the circumference of the sleeve 210, and multiple sets are spaced apart along the circumference of the sleeve 210. The crossbars 212 rotate with the sleeve 210, which can agitate the biomass pellet fuel in the storage chamber 110 and prevent bridging.

[0034] When using this biomass pellet fuel metering and feeding device: The motor 300 on top of the storage tank 100 is turned on. The output shaft of the motor 300 drives the gear 302 to rotate. The gear 302 meshes with the gear ring 213 on the outer side of the sleeve 210, thereby driving the sleeve 210 to rotate slowly around its own axis. At the same time, the crossbar 212 on the sleeve 210 inside the storage chamber 110 rotates synchronously with the sleeve 210, agitating the biomass pellet fuel in the storage chamber 110. This effectively prevents the biomass pellet fuel from bridging due to accumulation, ensuring that the biomass pellet fuel can continuously and smoothly enter the feeding chamber 120 through the discharge port 131 on the fixed plate 130.

[0035] As the sleeve 210 rotates, the multiple baffles 211 on the sleeve 210 rotate synchronously. When the feeding chamber 230, formed by the adjacent baffles 211, the inner wall of the feeding chamber 120, and the feeding plate 222, rotates to directly below the discharge port 131 of the fixed plate 130, the biomass pellet fuel in the storage chamber 110 falls into the feeding chamber 230 through the discharge port 131 until the entire chamber is filled.

[0036] As the sleeve 210 continues to rotate, when the feeding chamber 230, which is filled with biomass pellet fuel, rotates to the feeding port 102 on the side wall of the feeding chamber 120, the biomass pellet fuel in the chamber slides down naturally along the inclined feeding plate 222 under the action of gravity due to the inclined feeding plate 222. It then enters the biomass pellet combustion furnace precisely through the feeding port 102, completing one feeding action.

[0037] The sleeve 210 rotates continuously, and the subsequently empty feeding chambers 230 rotate sequentially to the bottom of the discharge port 131 to receive fuel, and then rotate to the feeding port 102 to complete the feeding. This cycle repeats continuously, achieving continuous and quantitative feeding of the combustion furnace. During this process, the rotation speed of the sleeve 210 can be controlled by adjusting the speed of the motor 300, thereby adjusting the feeding frequency per unit time and further optimizing the feeding amount to meet the real-time needs of the combustion furnace.

[0038] When the feeding amount needs to be adjusted, the operator rotates the rotating part 227 at the top of the adjusting rod 220. Since the adjusting rod 220 is threadedly connected to the sleeve 210, the adjusting rod 220 moves axially during rotation. The bottom end of the adjusting rod 220 drives all the feeding plates 222 to rise and fall synchronously through the fixing ring 221, thereby changing the volume of the feeding chamber 230. If the feeding amount needs to be increased, the feeding plates 222 are lowered to expand the volume of the feeding chamber 230; if the feeding amount needs to be reduced, the feeding plates 222 are raised to reduce the volume of the feeding chamber 230.

[0039] After the volume of the feeding chamber 230 is adjusted to the target size, observe the first positioning hole 225 of the positioning ring plate 224 on the adjusting rod 220 and the second positioning hole on the top surface of the sleeve 210. When the two are aligned, insert the positioning pin 226 into the aligned hole to fix the adjusting rod 220 and the sleeve 210 relative to each other, so as to prevent the volume of the feeding chamber 230 from shifting in subsequent work.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A biomass pellet fuel metering device, comprising a storage tank (100), wherein a lower portion of the storage tank (100) is provided with a feeding cavity (120), characterized in that, A sleeve (210) rotatably connected to the feeding chamber (120) is inserted along its axis. The sleeve (210) is spaced apart from the bottom surface of the feeding chamber (120). A partition (211) is provided vertically on the sleeve (210). Multiple partitions (211) are evenly arranged around the surface of the sleeve (210). An adjusting rod (220) threadedly connected to the sleeve (210) is inserted through the sleeve (210). The bottom end of the adjusting rod (220) extends to the bottom of the sleeve (210). Below, and at the bottom end of the adjusting rod (220) is a fixed ring (221) rotatably connected to it. The fixed ring (221) is provided with a feeding plate (222). The feeding plate (222), the adjacent partition (211) and the inner wall of the feeding chamber (120) enclose the feeding compartment (230). When the adjusting rod (220) is rotated, the adjusting rod (220) drives the feeding plate (222) to move axially, so as to synchronously adjust the volume of each feeding compartment (230).

2. A dosing device according to claim 1, characterized in that The top end of the sleeve (210) extends above the storage tank (100), and the top end of the adjusting rod (220) extends above the top end of the sleeve (210). The adjusting rod (220) and the sleeve (210) are fixed by a positioning pin (226).

3. A dosing device according to claim 1, characterized in that The feeding plate (222) is inclined, and the high end of the feeding plate (222) is connected to the fixing ring (221).

4. A dosing device according to claim 3, c h a r a c t e r i z e d in that The feeding plate (222) has a baffle (223) vertically arranged at its high end. The upper edge of the baffle (223) is located above the bottom of the sleeve (210). The baffle (223) is slidably engaged with the sleeve (210) and the two side partitions (211) respectively.

5. A dosing device according to claim 2, characterized in that The storage tank (100) is provided with a storage cavity (110), which is located above and connected to the feeding cavity (120). The sleeve (210) inside the storage cavity (110) is provided with a crossbar (212) that is vertically connected to it.

6. A dosing device according to claim 2, characterized in that The storage tank (100) is equipped with a motor (300) at the top, and the output shaft of the motor (300) is equipped with a gear (302). The sleeve (210) is equipped with a gear ring (213) that meshes with the gear (302).

7. A dosing device according to claim 2, characterized in that The adjusting rod (220) located above the sleeve (210) is provided with a positioning ring plate (224). The positioning ring plate (224) is evenly provided with a first positioning hole (225) around its circumference. The top surface of the sleeve (210) is provided with a second positioning hole. The first positioning hole (225) and the second positioning hole are connected and fixed by a positioning pin (226).

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