A kind of anti-blocking screw feeding device applied to biomass feed inlet

Abstract

The utility model discloses a kind of anti-blocking spiral feeding devices applied to biomass feed inlet, comprising: conveying pipe, feed hopper, movable baffle and driving motor;Conveying pipe is provided with helical shaft with spiral blade in;Conveying pipe top is provided with feed inlet, bottom is provided with discharge port;Feed hopper is communicated with the feed inlet of conveying pipe;Feed hopper is provided with crushing shaft, and a plurality of crushing knives are set along the length direction of crushing shaft;Conveying pipe bottom is provided with clear material port in the position opposite to feed inlet, movable baffle is set at clear material port, movable baffle is connected with cylinder, the fixed end of cylinder is connected with conveying pipe, cylinder drives movable baffle to move and realizes the opening or closing of clear material port;The output end of driving motor is connected with helical shaft, crushing shaft, and simultaneously drives helical shaft, crushing shaft rotation.The feeding device in the utility model can improve feeding efficiency and ensure smooth feeding.

Description

Technical Field

[0001] This utility model relates to the field of biomass gasification furnace technology, and more specifically to an anti-clogging spiral feeding device applied to the biomass inlet. Background Technology

[0002] Against the backdrop of increasing global demand for renewable energy, biomass energy, as a key renewable energy source, has received increasing attention for its development and utilization. In the process of biomass energy utilization, the biomass feeding system plays a crucial role, and screw feeders, with their advantages of simple structure and stable conveying, have been widely used in biomass feeding systems.

[0003] However, in practical applications, existing biomass screw feeders have many problems. Biomass materials, such as construction waste and forestry waste, typically have irregular shapes, uneven density, and large variations in moisture content. These characteristics make biomass materials prone to clogging at the feed inlet during the feeding process. Once clogging occurs, it not only reduces production efficiency, causes equipment downtime, and increases maintenance costs, but may also lead to safety accidents, causing numerous inconveniences to production.

[0004] Currently available anti-clogging measures are clearly inadequate. Some devices increase conveying capacity by simply increasing the rotational speed of the auger blades, but this not only exacerbates material breakage and increases energy consumption, but also fails to effectively solve the clogging problem. Other devices use vibration or agitation to assist feeding, but these methods are not ideal for biomass materials with high viscosity or strong entanglement, and cannot fundamentally solve the problem.

[0005] Therefore, developing an anti-clogging screw feeder for biomass feed inlets that can improve feeding efficiency and ensure smooth feeding is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides an anti-clogging screw feeder for biomass feed inlets that can improve feeding efficiency and ensure smooth feeding.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A clog-resistant screw feeder for biomass inlets includes:

[0009] A conveying pipe, wherein a spiral shaft with spiral blades is provided inside the conveying pipe; the top of the conveying pipe has a feed inlet and the bottom has a discharge outlet;

[0010] A feeding hopper is connected to the feed inlet of the conveying pipe; a crushing shaft is provided inside the feeding hopper, and multiple crushing blades are arranged along the length of the crushing shaft;

[0011] A movable baffle is provided. A cleaning port is provided at the bottom of the conveying pipe, which is directly opposite the feed inlet. The movable baffle is located at the cleaning port. A cylinder is connected to the movable baffle. The fixed end of the cylinder is connected to the conveying pipe. The cylinder drives the movable baffle to move, thereby opening or closing the cleaning port.

[0012] A drive motor is provided, the output end of which is connected to the screw shaft and the crushing shaft, and simultaneously drives the screw shaft and the crushing shaft to rotate.

[0013] The beneficial effects of adopting the above technical solution are that by setting a crushing shaft and crushing blades, large pieces of biomass materials can be crushed into smaller particles, making them easier to enter the conveying pipe and be conveyed by the screw shaft. This reduces the blockage of the feed inlet caused by excessively large materials, thereby improving the feeding efficiency. The design of the movable baffle in conjunction with the cleaning port allows the cleaning port to be opened by the cylinder when blockage occurs, so as to discharge the blocked material and solve the blockage problem in time, ensuring the smooth feeding process.

[0014] Preferably, the pitch of the helical blades on the surface of the helical shaft gradually increases from the inlet to the outlet. This gradual increase in the helical blade pitch reduces the thrust on the material during transport, preventing material accumulation in the conveying pipe due to excessive thrust, thus further reducing the possibility of blockage and optimizing the material conveying effect.

[0015] Preferably, the bottom of the conveying pipe is provided with a limiting component to prevent the moving baffle from deviating from the moving direction. The limiting component effectively prevents the moving baffle from deviating from the predetermined track during movement, ensuring the accurate opening and closing of the cleaning port, and improving the reliability and safety of the equipment.

[0016] Preferably, the surface of the conveying pipe is provided with an inspection port. The inspection port facilitates regular inspection and maintenance of the inside of the conveying pipe by personnel, enabling timely detection and resolution of potential problems and ensuring the normal operation of the equipment.

[0017] Preferably, the output end of the drive motor is connected to the screw shaft, and both the screw shaft and the crushing shaft are equipped with sprockets, with a chain connecting the two sprockets. This sprocket and chain transmission method ensures that the power of the drive motor is efficiently and stably transmitted to the screw shaft and the crushing shaft, guaranteeing synchronous rotation of the screw shaft and the crushing shaft, and improving the efficiency and reliability of power transmission.

[0018] Preferably, protective covers are provided at the connection between the spiral shaft and the crushing shaft, and at the connection between the spiral shaft and the drive motor.

[0019] Preferably, the inner wall of the conveying pipe is provided with a wear-resistant layer. The wear-resistant layer significantly improves the wear resistance of the inner wall of the conveying pipe, effectively resists the wear of the biomass material on the inner wall of the conveying pipe during the conveying process, and extends the service life of the conveying pipe.

[0020] Preferably, the inner wall of the feed hopper is provided with an anti-sticking layer. The anti-sticking layer effectively prevents biomass materials from adhering to the inner wall of the feed hopper, ensuring that the materials can smoothly enter the conveying pipe, further improving the feeding efficiency and avoiding feeding difficulties and blockages caused by material adhesion.

[0021] As can be seen from the above technical solution, compared with the prior art, this utility model discloses an anti-clogging screw feeder device applied to the biomass inlet, the beneficial effects of which are:

[0022] (1) By setting the crushing blade and optimizing the pitch of the spiral blade, large particles or agglomerated materials can be crushed, making it easier for the material to enter the conveying pipe and be conveyed efficiently, reducing feeding difficulties caused by material characteristics.

[0023] (2) When a blockage occurs, the movement of the baffle and the reversal of the drive motor facilitate the clearing of the blocked material at the material clearing port, ensuring a smooth feeding process.

[0024] (3) The wear-resistant layer and the anti-stick coating improve the wear resistance and anti-stick performance of the equipment, extend the service life of the equipment, and also ensure smooth feeding. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 The attached figure is a schematic diagram of the feeding device provided by this utility model;

[0027] Figure 2 The attached figure is a logic diagram for controlling material blockage provided by this utility model.

[0028] In the figure,

[0029] 1- Delivery pipe;

[0030] 11-Screw shaft; 12-Feed inlet; 13-Discharge outlet; 14-Cleansing outlet; 15-Inspection port;

[0031] 2-Feed hopper;

[0032] 21-Crushing shaft; 22-Crushing blade;

[0033] 3-Moving baffle; 4-Cylinder; 5-Drive motor; 6-Limiting component; 7-Sprocket; 8-Chain; 9-Protective cover. Detailed Implementation

[0034] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] This utility model discloses an anti-clogging screw feeder for biomass inlets, comprising:

[0036] The conveying pipe 1 has a spiral shaft 11 with spiral blades installed inside it; the top of the conveying pipe 1 has a feed inlet 12 and the bottom has a discharge outlet 13.

[0037] Feed hopper 2 is connected to the feed inlet 12 of conveying pipe 1; a crushing shaft 21 is provided inside the feed hopper 2, and multiple crushing blades 22 are provided along the length of the crushing shaft 21.

[0038] The movable baffle 3 and the conveying pipe 1 are provided with a cleaning port 14 at the bottom of the conveying pipe 1 and the feed port 12. The movable baffle 3 is set at the cleaning port 14. The movable baffle 3 is connected to a cylinder 4. The fixed end of the cylinder 4 is connected to the conveying pipe 1. The cylinder 4 drives the movable baffle 3 to move to open or close the cleaning port 14.

[0039] The drive motor 5 is connected to the screw shaft 11 and the crushing shaft 21 at its output end, and simultaneously drives the screw shaft 11 and the crushing shaft 21 to rotate.

[0040] To further optimize the above technical solution, the screw shaft 11 is rotatably connected to both ends of the conveying pipe 1 via bearings; the crushing shaft 21 is rotatably connected to the side wall of the feed hopper 2 via bearings. The crushing blade 22 first cuts large pieces of material, making it easier for the material to enter the conveying pipe 1 for screw conveying and reducing the possibility of blockage; at the same time, a cleaning port 14 is added. When blockage occurs, the screw shaft 11 can be rotated in the reverse direction to move the blocked material to the cleaning port 14 for cleaning, which can solve the blockage problem in a timely manner.

[0041] To further optimize the above technical solution, the pitch of the helical blades on the surface of the helical shaft 11 gradually increases from the feed inlet 12 to the discharge outlet 13. The gradual increase in pitch can loosen the material during the conveying process, reducing the accumulation and blockage of the material.

[0042] To further optimize the above technical solution, the bottom of the conveying pipe 1 is provided with a limiting member 6 to prevent the moving baffle 3 from deviating from the moving direction. The limiting member 6 can be a sliding groove structure, which facilitates the movement of the moving baffle 3 and prevents the position from deviating during the movement; or it can be a limiting block on both sides of the moving baffle 3 to limit the moving direction of the moving baffle 3 during the movement.

[0043] To further optimize the above technical solution, an inspection port 15 is provided on the surface of the conveying pipe 1.

[0044] To further optimize the above technical solution, the output end of the drive motor 5 is connected to the screw shaft 11. Both the screw shaft 11 and the crushing shaft 21 are equipped with sprockets 7, and a chain 8 is connected between the two sprockets 7.

[0045] To further optimize the above technical solution, protective covers 9 are provided on the outside of the connection between the screw shaft 11 and the crushing shaft 21, and the connection between the screw shaft 11 and the drive motor 5. The protective covers 9 can prevent dust from the material from entering the bearing at the connection; the output end of the drive motor 5 is connected to the reduction motor and the coupling in sequence, and the screw shaft 11 is connected to the coupling.

[0046] To further optimize the above technical solution, a wear-resistant layer is provided on the inner wall of the conveying pipe 1. The wear-resistant layer can be made of hard alloy material to improve the wear resistance of the conveying pipe 1 and extend its service life.

[0047] To further optimize the above technical solution, an anti-sticking layer is provided on the inner wall of the feed hopper 2. The anti-sticking layer is made of hard alloy material, which can prevent biomass materials from adhering to the inner wall of the feed hopper 2 and affecting the feeding efficiency.

[0048] The screw feeder is also equipped with a frequency converter (an existing frequency converter) for controlling the speed of the drive motor. Before use, the frequency converter can perform a self-check to determine if there are any faults. During use, the formulas for calculating the actual power and current of the frequency converter are as follows:

[0049]

[0050] Among them, P 铭牌功率 It is the power rating indicated on the inverter's nameplate, F 实际HZ This refers to the actual operating frequency of the motor, F. 50hz This refers to the motor's operating frequency of 50Hz, U refers to the motor's voltage, η refers to the motor's efficiency, and φ refers to the power factor.

[0051] Taking a 25kW drive motor as an example, calculations show that when the drive motor runs at a frequency of 20Hz, The calculated normal operating current of the frequency converter is about 2.84A. When the operating current exceeds 150% of the normal current value, it indicates that a blockage has occurred in the conveying pipe. When 2.84 * 150% = 4.26A, the drive motor 5 reverses and the cylinder 4 is activated to open the moving baffle 3. After about 20 seconds, the blocked material is cleared, the drive motor 5 rotates forward and the cylinder 4 is activated to close the moving baffle 3, thus clearing the blockage.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clogging-prevention screw feeder for biomass inlets, characterized in that, include: A conveying pipe, wherein a spiral shaft with spiral blades is provided inside the conveying pipe; the top of the conveying pipe has a feed inlet and the bottom has a discharge outlet; A feeding hopper is connected to the feed inlet of the conveying pipe; a crushing shaft is provided inside the feeding hopper, and multiple crushing blades are arranged along the length of the crushing shaft; A movable baffle is provided. A cleaning port is provided at the bottom of the conveying pipe, which is directly opposite the feed inlet. The movable baffle is located at the cleaning port. A cylinder is connected to the movable baffle. The fixed end of the cylinder is connected to the conveying pipe. The cylinder drives the movable baffle to move, thereby opening or closing the cleaning port. A drive motor is provided, the output end of which is connected to the screw shaft and the crushing shaft, and simultaneously drives the screw shaft and the crushing shaft to rotate.

2. The anti-clogging screw feeder for biomass inlets according to claim 1, characterized in that, The pitch of the helical blades on the surface of the helical shaft gradually increases from the inlet to the outlet.

3. The anti-clogging screw feeder for biomass inlets according to claim 1, characterized in that, The bottom of the conveying pipe is provided with a limiting component to prevent the moving baffle from deviating from the moving direction.

4. The anti-clogging screw feeder for biomass inlets according to claim 3, characterized in that, The surface of the conveying pipe is provided with an inspection port.

5. The anti-clogging screw feeder for biomass inlets according to claim 1, characterized in that, The output end of the drive motor is connected to the spiral shaft. Both the spiral shaft and the crushing shaft are equipped with sprockets, and a chain connects the two sprockets.

6. The anti-clogging screw feeder for biomass inlets according to claim 5, characterized in that, Protective covers are provided at the connection between the spiral shaft and the crushing shaft, and at the connection between the spiral shaft and the drive motor.

7. The anti-clogging screw feeder for biomass inlets according to claim 1, characterized in that, The inner wall of the conveying pipe is provided with a wear-resistant layer.

8. The anti-clogging screw feeder for biomass inlets according to claim 7, characterized in that, The inner wall of the feed hopper is provided with an anti-sticking layer.

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