A material conveying device for preparing a miscanthus pellet

Abstract

The utility model discloses a kind of material conveying devices of miscellaneous wood granule preparation, belong to granular material conveying field, including cyclone, and the top end and bottom end of cyclone are respectively communicated with import pipe and discharge bin, and the top of import pipe and the bottom of discharge bin are both provided with double-bin sealing structure, respectively for feeding and discharging, double-bin sealing structure all includes two conveying pipelines, and two conveying pipelines are all communicated with storage bin, and the top end and bottom end of storage bin are respectively provided with upper gate valve and lower gate valve, and high level meter and low level meter are respectively arranged near upper gate valve and lower gate valve, and the turning place of import pipe and conveying pipeline is set as large radius elbow, and wear-resistant lining is detachably arranged on the inner wall of large radius elbow, and the top end of cyclone is communicated with exhaust pipe, and the exhaust end of exhaust pipe is detachably provided with cloth bag dust collector.

Description

Technical Field

[0001] This utility model relates to the field of granular material conveying, specifically to a material conveying device for preparing mixed wood pellets. Background Technology

[0002] In the field of hardwood pellet production, material conveying devices play a crucial role. Currently, existing hardwood pellet material conveying systems mainly adopt pneumatic conveying methods, and their core components include feeding devices, conveying pipelines, gas-solid separation devices, and control systems.

[0003] From the perspective of feeding devices, common rotary valves and screw feeders have many problems. There are gaps between the blades and the housing of the rotary valve, while hardwood particles are fibrous, hard, and easily deformed, making it difficult to form an effective seal during feeding. High-pressure airflow can backflow through these gaps, affecting not only the stability of feeding but also wasting energy.

[0004] Meanwhile, long-fiber materials easily become entangled on the rotary valve shaft or stuck between the blades and pipe wall of the screw feeder, causing blockages in the feeding device. Furthermore, the abrasive nature of hardwood particles rapidly wears down the blades and casing; as the gaps widen, airflow backflow intensifies, creating a vicious cycle. This series of problems leads to low conveying efficiency, increased system energy consumption, and frequent shutdowns to clear blockages, affecting continuous production. The rotary valve or screw blades become vulnerable parts, significantly increasing maintenance costs. Similarly, the discharge valve under a cyclone separator is typically a rotary valve, which is prone to sealing and blockage issues. Poor sealing disrupts the negative pressure balance within the separator, affecting separation efficiency.

[0005] Regarding the conveying pipelines, the existing elbow design is unreasonable, with many using small-radius 90-degree elbows. When materials suddenly change direction at these elbows, they violently impact the pipe walls. The pipe material also has issues; ordinary carbon steel pipes have poor wear resistance and cannot withstand the abrasion from wood particles. These defects lead to severe pipe wear and perforation, frequent blockages, and particle breakage, generating excessive powder and reducing product quality and value. Utility Model Content

[0006] To address the technical problems of sealing and jamming issues in rotary valves, poor wear resistance leading to severe pipe wear and perforation, and frequent blockages, this invention provides a material conveying device for preparing mixed wood pellets.

[0007] A material conveying device for preparing mixed wood pellets includes a cyclone separator. An inlet pipe and a discharge hopper are connected at the top and bottom of the cyclone separator, respectively. A double-hopper sealing structure is installed above the inlet pipe and below the discharge hopper, for feeding and discharging materials, respectively. Each double-hopper sealing structure includes two conveying pipes, both of which are connected to a storage hopper. An upper gate valve and a lower gate valve are installed at the top and bottom of the storage hopper, respectively. A high-level gauge and a low-level gauge are installed near the upper and lower gate valves, respectively. The bends in the inlet pipe and conveying pipes are large-radius elbows, with a removable wear-resistant lining on the inner wall of the large-radius elbow. An exhaust pipe is connected at the top of the cyclone separator, and a bag filter is removably installed at the exhaust end of the exhaust pipe.

[0008] More preferably, it also includes a support frame, which is double-layered. The upper layer is fixedly embedded with a double-bin sealing structure for feeding, and the lower layer is fixedly embedded with a cyclone separator. A PLC program display panel is also fixedly installed on the support frame. The air inlet end of the exhaust pipe is fixedly installed on the top of the cyclone separator, and the exhaust end of the exhaust pipe is connected to a bag filter dust collector through a flange.

[0009] More preferably, the inlet pipe is installed through the side wall at the top of the cyclone separator, and two conveying pipes are connected at the top of the inlet pipe. The storage hopper in the double hopper sealing structure above the inlet pipe is used for feeding, and a hopper is connected at the top of the storage hopper.

[0010] More preferably, the discharge hopper is located at the discharge port at the bottom of the cyclone separator. A conical diverter block is fixedly installed on the bottom wall of the discharge hopper to divert the material to both sides. The two conveying pipes in the double hopper sealed structure located below the discharge hopper are funnel structures. The bottom of the funnel structure is connected to a storage hopper for discharging material. A flexible hose is installed at the bottom of the storage hopper, and a collection box is movably placed below the flexible hose.

[0011] More preferably, the bending radius of the large-radius elbow is 3 to 5 times the diameter of the inlet pipe and the delivery pipe. The large-radius elbow has a carbon steel shell and a wear-resistant lining, which includes one of ceramic, rare earth alloy, and polyethylene plate. Both ends of the large-radius elbow and the wear-resistant lining are provided with flanges, and the two sets of flanges can be fixed together by bolt assemblies. The large-radius elbow is connected to the inlet pipe and other parts of the delivery pipe by butt welding to ensure that the inner wall of the pipe is smooth and continuous.

[0012] More preferably, the PLC program display panel is electrically connected to the upper gate valve, the lower gate valve, the high level gauge, and the low level gauge.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: The improved feeding device solves the problems of poor sealing, easy jamming and entanglement, and severe wear of existing feeding devices. The dual-hopper sealing structure has good sealing performance, effectively preventing high-pressure airflow backflow, ensuring feeding stability, and avoiding energy waste. The optimized design of the large-radius elbows in the inlet pipe and conveying pipeline reduces material wear and blockage of the pipeline. The large-radius elbows and replaceable wear-resistant linings reduce the impact force of the material, making material conveying smoother. The dual-hopper sealing structure below the cyclone separator improves separation efficiency, reduces material leakage, and ensures product quality. Attached Figure Description

[0014] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a top view of the structural components of this utility model;

[0016] Figure 3 This is a top view of the material discharge bin 3 of this utility model;

[0017] Figure 4 This is a schematic diagram of part A of the structure of this utility model;

[0018] Figure 5 This is a schematic diagram of part B of the structure of this utility model;

[0019] Figure 6 This is a schematic diagram of part C of the present utility model.

[0020] In the diagram: 1. Cyclone separator; 2. Inlet pipe; 3. Discharge hopper; 4. Double hopper sealing structure; 5. Conveying pipeline; 6. Storage hopper; 7. Upper gate valve; 8. Lower gate valve; 9. High level gauge; 10. Low level gauge; 11. Exhaust pipe; 12. Baghouse dust collector; 13. Support frame; 14. PLC program display panel; 15. Large radius elbow; 16. Wear-resistant lining; 17. Hopper; 18. Conical diverter block; 19. Collection box; 20. Flange edge. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, some of the aforementioned terms, besides indicating location or positional relationships, may also have other meanings. For example, the term "above" may, in certain circumstances, indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances. Additionally, the term "multiple" should mean two or more.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The following will refer to the accompanying drawings. Figures 1-6 The present invention will be described in detail with reference to the embodiments.

[0026] A material conveying device for preparing mixed wood pellets includes a cyclone separator 1. The top and bottom of the cyclone separator 1 are respectively connected by an inlet pipe 2 and a discharge bin 3. A double-bin sealing structure 4 is provided above the inlet pipe 2 and below the discharge bin 3, which are used for feeding and discharging respectively. On the one hand, it can effectively prevent the backflow of high-pressure airflow, ensure the stability of feeding, and avoid energy waste. On the other hand, the double-bin sealing structure below the cyclone separator improves the separation efficiency, reduces the leakage of material, and ensures product quality.

[0027] It also includes a support frame 13, which is double-layered. The upper layer is fixedly embedded with a double hopper sealing structure 4 for feeding, and the lower layer is fixedly embedded with a cyclone separator 1. The inlet pipe 2 is installed through the side wall at the top of the cyclone separator 1. Two conveying pipes 5 are connected at the top of the inlet pipe 2. The storage hopper 6 in the double hopper sealing structure 4 above the inlet pipe 2 is used for feeding. The top of the storage hopper 6 is connected to a hopper 17.

[0028] First, install the inlet pipe 2 and two conveying pipes 5 above the cyclone separator 1, and install the two hoppers 17 on the storage bin 6, so that the inlet pipe 2 and the two conveying pipes 5 are connected, ensuring that the pipe connection is tight and leak-free.

[0029] The dual-hopper sealing structure 4 includes two conveying pipes 5, both of which are connected to a storage hopper 6. An upper gate valve 7 and a lower gate valve 8 are respectively installed at the top and bottom of the storage hopper 6. A high-level gauge 9 and a low-level gauge 10 are respectively installed near the upper gate valve 7 and the lower gate valve 8. The upper gate valve 7 is electrically connected to the high-level gauge 9, and the lower gate valve 8 is electrically connected to the low-level gauge 10. The parameters of the high-level gauge 9 and the low-level gauge 10 are set so that the two storage hoppers 6 can operate alternately. When one storage hopper 6 is feeding material and discharging it through the downstream conveying pipe 5, the other storage hopper 6 begins feeding material and isolates the upstream and downstream airflow.

[0030] The bends of the inlet pipe 2 and the conveying pipe 5 are configured as large-radius elbows 15. The inner wall of the large-radius elbow 15 is detachably equipped with a wear-resistant liner 16. The bending radius of the large-radius elbow 15 is 3 to 5 times the diameter of the inlet pipe 2 and the conveying pipe 5. The large-radius elbow 15 has a carbon steel shell, and the wear-resistant liner 16 includes one of ceramic, rare earth alloy, and polyethylene plate. Both ends of the large-radius elbow 15 and the wear-resistant liner 16 are provided with flange edges 20, which can be fixed together by bolt assemblies. The large-radius elbow 15 is connected to the other parts of the inlet pipe 2 and the conveying pipe 5 by butt welding to ensure that the inner wall of the pipe is smooth and continuous.

[0031] For the bends where the main wear occurs, a carbon steel shell is used. The large-radius elbow 15 is connected to the inlet pipe 2 and other parts of the conveying pipe 5 by butt welding with no internal steps, ensuring a smooth and continuous inner wall of the pipe. A replaceable wear-resistant liner 16 is installed at the elbow, and the liner is made of one of the following materials: ceramic, rare earth alloy, or polyethylene board.

[0032] First, install the flange edges 20 at both ends of the wear-resistant liner 16 and the flange edges 20 at both ends of the large radius elbow 15 using bolts or other means. Then, weld the two ends of the installed large radius elbow 15 to the inlet pipe 2 and the conveying pipe 5. At this point, the large radius elbow 15 is permanently fixed to the pipeline.

[0033] When wear is detected and the wear-resistant liner 16 needs replacement, workers do not need to cut the weld joints. They only need to locate the bolts on the large-radius elbow 15 used to secure the wear-resistant liner 16. These bolts are usually located within the operable range on the outside of the large-radius elbow 15. Unscrew these bolts and loosen the flange edge 20. Then, remove the worn fragments of the old wear-resistant liner 16 from the port of the large-radius elbow 15. Finally, assemble the new wear-resistant liner 16 as if piecing together... Figure 1 Insert the sample from the port, adjust its position, and then use bolts and flange 20 to fix it tightly to the large radius elbow 15. The large radius elbow 15 welded to the pipe is not moved at all during the entire process.

[0034] An exhaust pipe 11 is connected to the top of the cyclone separator 1. A bag filter 12 is detachably installed at the exhaust end of the exhaust pipe 11. The air inlet of the exhaust pipe 11 is fixedly installed at the top of the cyclone separator 1, and the exhaust end of the exhaust pipe 11 is connected to the bag filter 12 via a flange. The air separated by the cyclone separator 1 is discharged from the exhaust pipe 11, and then passes through the bag filter 12 again for dust removal. The cleaner air is then discharged into the outside air, avoiding environmental pollution.

[0035] A PLC program display panel 14 is also fixedly mounted on the support frame 13. The PLC program display panel 14 is electrically connected to the upper gate valve 7, lower gate valve 8, high level gauge 9, and low level gauge 10. The control program of the PLC program display panel is set so that it can automatically open and close the upper gate valve 7 and lower gate valve 8 according to the prompts from the high level gauge 9 and low level gauge 10, precisely controlling the opening and closing sequence of each valve through the PLC program display panel 14. The PLC program display panel 14 serves as the control center. The signals from all level gauges are connected to the PLC input point (I point), and the switching signals of all gate valves are controlled by the PLC output point (O point).

[0036] Both the upper gate valve 7 and the lower gate valve 8 are initially closed, and both storage bins 6 are idle. When material is fed into storage bin 6A, the upper gate valve 7A opens, and material falls from the hopper 17 into storage bin 6A. When storage bin 6A is full, the high-level gauge 9 in storage bin 6A sends a high-level signal.

[0037] Storage hopper 6A sealing: After receiving the signal, the PLC closes the upper gate valve 7A, at which point storage hopper 6A is completely sealed, and the airflow between the upper and lower parts is isolated. Storage hopper 6A discharge: After a short delay to ensure that the upper gate valve 7A is closed, the PLC opens the lower gate valve 8A, and the material is discharged into the conveying pipeline 5 under the action of gravity.

[0038] Emptying of storage bin 6A: The low level gauge 10 in storage bin 6A sends a low-level signal, indicating that the material has been emptied. Resealing of storage bin 6A: The PLC closes the lower gate valve 8A, and storage bin 6A returns to a sealed state, awaiting the next cycle.

[0039] Meanwhile, storage silo 6B is performing a feeding or discharging process that is completely separate from that of storage silo 6A. When storage silo 6A is feeding, storage silo 6B may be discharging or sealing; when storage silo 6A is discharging, storage silo 6B may be feeding or sealing, and so on, to achieve continuous feeding.

[0040] The discharge bin 3 is located at the discharge port at the bottom of the cyclone separator 1. A conical diverter block 18 is fixedly installed on the bottom wall of the discharge bin 3 to divert the material to both sides and avoid material accumulation. The two conveying pipes 5 in the double hopper sealing structure 4 located below the discharge bin 3 are funnel structures to facilitate material discharge. The bottom of the funnel structure is connected to a storage bin 6 for material discharge. A flexible hose is installed at the bottom of the storage bin 6, and a collection box 19 is movably placed below the flexible hose.

[0041] Similarly, the material after the gas is separated in the discharge bin 3 is also discharged in a sealed manner. The material is then transported to the collection box 19 for unified collection through the alternating discharge of the two storage bins 6.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A material conveying device for preparing hardwood pellets, comprising a cyclone separator (1), characterized in that: The top and bottom of the cyclone separator (1) are respectively connected by an inlet pipe (2) and a discharge bin (3). A double-bin sealing structure (4) is provided above the inlet pipe (2) and below the discharge bin (3) for feeding and discharging respectively. The double-bin sealing structure (4) includes two conveying pipes (5). The two conveying pipes (5) are connected by a storage bin (6). The top and bottom of the storage bin (6) are respectively provided by an upper gate valve (7) and a lower gate valve (8). A high level gauge (9) and a low level gauge (10) are respectively installed near the upper gate valve (7) and the lower gate valve (8). The bends of the inlet pipe (2) and the conveying pipe (5) are set as large radius elbows (15). The inner wall of the large radius elbow (15) is detachably equipped with a wear-resistant lining (16). The top of the cyclone separator (1) is connected to an exhaust pipe (11). The exhaust end of the exhaust pipe (11) is detachably equipped with a bag filter (12).

2. The material conveying device for preparing hardwood pellets according to claim 1, characterized in that: It also includes a support frame (13), which is double-layered. The upper layer is fixedly embedded with a double hopper sealing structure (4) for feeding, and the lower layer is fixedly embedded with a cyclone separator (1). A PLC program display panel (14) is also fixedly installed on the support frame (13). The air inlet end of the exhaust pipe (11) is fixedly installed on the top of the cyclone separator (1), and the exhaust end of the exhaust pipe (11) is connected to a bag filter (12) through a flange.

3. The material conveying device for preparing hardwood pellets according to claim 2, characterized in that: The inlet pipe (2) is installed through the side wall at the top of the cyclone separator (1). Two conveying pipes (5) are connected at the top of the inlet pipe (2). The storage bin (6) in the double hopper sealing structure (4) above the inlet pipe (2) is used for feeding. The top of the storage bin (6) is connected to the hopper (17).

4. The material conveying device for preparing hardwood pellets according to claim 3, characterized in that: The discharge bin (3) is located at the discharge port at the bottom of the cyclone separator (1). A conical diverter block (18) is fixedly installed on the bottom wall of the discharge bin (3) to divert the material to both sides. The two conveying pipes (5) in the double hopper sealing structure (4) located below the discharge bin (3) are funnel structures. The bottom of the funnel structure is connected to a storage bin (6) for discharging material. A hose is installed at the bottom of the storage bin (6), and a collection box (19) is placed below the hose.

5. The material conveying device for preparing hardwood pellets according to claim 4, characterized in that: The bending radius of the large radius elbow (15) is 3 to 5 times the diameter of the inlet pipe (2) and the conveying pipe (5). The large radius elbow (15) has a carbon steel shell and a wear-resistant liner (16) including one of ceramic, rare earth alloy, and polyethylene plate. Both ends of the large radius elbow (15) and the wear-resistant liner (16) are provided with flange edges (20). The two sets of flange edges (20) can be fixed together by bolt assembly. The large radius elbow (15) is connected to the inlet pipe (2) and the other parts of the conveying pipe (5) by butt welding to ensure that the inner wall of the pipe is smooth and continuous.

6. The material conveying device for preparing hardwood pellets according to claim 5, characterized in that: The PLC program display panel (14) is electrically connected to the upper gate valve (7), the lower gate valve (8), the high level gauge (9), and the low level gauge (10).

Images