Straw pellet fuel cooling and screening device

Abstract

The utility model discloses a straw pellet fuel cooling and screening device which comprises an obliquely-arranged frame, a vibration motor is installed on the frame, the bottoms of the two ends of the frame are connected with supporting columns of different heights through supporting springs, and hydraulic cylinders are arranged at the bottoms of the supporting columns. A connecting plate used for installing a screening assembly is arranged in the frame, the screening assembly comprises a first screen mechanism, a second screen mechanism and a third screen mechanism which are sequentially and transversely arranged, the diameters of screen holes of the first screen mechanism, the second screen mechanism and the third screen mechanism are sequentially increased, and each of the first screen mechanism, the second screen mechanism and the third screen mechanism comprises a detachable outer shell and a baffle. The screening device is scientific and reasonable in structural design, the placing angle of the frame can be adjusted so as to meet the screening requirements under different conditions, and the purpose of continuously and efficiently screening materials can be achieved by adopting the multi-stage distributed screening mechanism, so that the screening mechanism can be quickly disassembled and assembled so as to be convenient to clean and maintain.

Description

Technical Field

[0001] This utility model relates to the technical field of pellet fuel screening equipment, specifically a straw pellet fuel cooling and screening device. Background Technology

[0002] Straw pellet fuel requires screening during production. Traditional screening devices have the following problems in the straw pellet fuel production process:

[0003] Single-stage screens cannot achieve multi-particle-size grading, resulting in uneven fuel quality; the fixed structure of the screen body causes rapid vibration decay, leading to low screening efficiency; screen replacement requires complete disassembly, making maintenance time-consuming and labor-intensive; furthermore, the screen body angle is not adjustable, making it unable to adapt to different fuel characteristics (such as changes in humidity affecting flowability). Therefore, we propose a straw pellet fuel cooling and screening device. Utility Model Content

[0004] The purpose of this invention is to provide a straw pellet fuel cooling and screening device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a straw pellet fuel cooling and screening device, comprising an inclined frame, a vibration motor mounted on the frame, support columns of different heights connected to the bottom of both ends of the frame by support springs, a hydraulic cylinder at the bottom of the support columns, a connecting plate for installing screening components inside the frame, the screening components comprising a first screen mechanism, a second screen mechanism, and a third screen mechanism arranged horizontally in sequence with progressively larger screen hole diameters, each of the first, second, and third screen mechanisms comprising a detachable outer shell and a baffle, an inner shell with a built-in screen installed inside the outer shell, the outer side of the inner shell being engaged in a slot opened on the inner side of the outer shell and the baffle, and a connecting block detachably connected to the connecting plate on the side of the outer shell.

[0006] In the above scheme, a conveyor belt is provided above the frame.

[0007] In the above scheme, a collection box is provided at the lower end of the frame.

[0008] In the above scheme, the first screen mechanism, the second screen mechanism and the third screen mechanism are respectively provided with independent diversion boxes below them.

[0009] In the above scheme, the baffle is inserted into the opening of the outer shell and locked in place by a bolt assembly.

[0010] In the above scheme, the vibration motor is connected to the power supply and switch via wires.

[0011] In the above scheme, the tilt angle of the frame is 30-60 degrees.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This straw pellet fuel cooling and screening device has a simple and reasonable structural design and strong practicality. By setting a support mechanism composed of support springs, support columns and hydraulic cylinders, the placement angle of the frame can be adjusted to meet the screening requirements under different conditions. The multi-stage distributed screening mechanism can achieve the purpose of continuous and efficient screening of materials. Furthermore, by setting a connecting mechanism composed of outer shell, baffle, inner shell, connecting block and other structures, the screening mechanism can be quickly disassembled and installed, which facilitates cleaning and maintenance and further improves the use effect of the device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the screening mechanism of this utility model.

[0015] Figure 3 This is a schematic diagram of the outer shell connection structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of this utility model.

[0017] In the diagram: 1. Frame; 11. Conveyor belt; 12. Vibration motor; 13. Support spring; 14. Support column; 15. Hydraulic cylinder; 16. Collection box; 17. Connecting plate; 18. First screen mechanism; 19. Second screen mechanism; 20. Third screen mechanism; 21. Outer shell; 22. Baffle; 23. Inner shell; 24. Slot; 25. Connecting block; 26. Diverter box; 27. Bolt assembly. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-4This utility model provides a technical solution: a straw pellet fuel cooling and screening device, including an inclined frame 1, a vibration motor 12 installed on the frame 1, and support columns 14 of different heights connected to the bottom of both ends of the frame 1 by support springs 13. A hydraulic cylinder 15 is provided at the bottom of the support column 14. A connecting plate 17 for installing screening components is provided inside the frame 1. The screening components include a first screen mechanism 18, a second screen mechanism 19, and a third screen mechanism 2 arranged horizontally in sequence with progressively larger screen hole diameters. The first screen mechanism 18, the second screen mechanism 19, and the third screen mechanism 2 each include a detachable outer shell 21 and a baffle 22. An inner shell 23 with a built-in screen is installed inside the outer shell 21. The outer side of the inner shell 23 is engaged in a slot 24 opened on the inner side of the outer shell 21 and the baffle 22. A connecting block 25 detachably connected to the connecting plate 17 is provided on the side of the outer shell 21.

[0020] Frame 1 is welded from Q235B steel, 6mm thick, and coated with anti-rust paint. Vibration motor 12 is a YZU-10-6 type, with an excitation force of 10kN and a speed of 960r / min, rigidly connected to frame 1 by bolts. Support spring 13 is made of 65Mn spring steel, with an elastic coefficient of 150N / mm and a pre-compression of 30mm. Combined with the height difference of support columns 14 (adjustable from 100-300mm), the tilt angle of frame 1 can be steplessly adjusted within the range of 30°-60°. Hydraulic cylinder 15 has a stroke of 150mm and a working pressure of 16MPa. The height of support columns 14 is controlled by a hydraulic pump station, with a response time ≤5 seconds. The screening components adopt a modular design: the first screen mechanism 18 has a screen hole diameter of 2mm, the second screen mechanism 19 has a screen hole diameter of 5mm, and the third screen mechanism 2 has a screen hole diameter of 8mm, achieving three-stage gradient screening. The inner shell 23 and the outer shell 21 are fitted with a clearance groove 24 with a locking depth of 8mm to ensure the screen installation accuracy. The connecting block 25 is fixed to the connecting plate 17 with M10 bolts, which allows for quick disassembly.

[0021] In the above scheme, a conveyor belt 11 is provided above the frame 1. The conveyor belt 11 is a ring-shaped rubber belt with a width of 600mm. The conveyor belt support is welded from square steel pipes, and a guide plate is provided at the inlet of the conveyor belt to ensure that the material is evenly distributed on the screen surface.

[0022] In the above scheme, a collection box 16 is provided below the tail end of the frame 1. A pneumatic unloading valve is provided at the bottom of the collection box 16 and is connected to the production line pipeline.

[0023] In the above scheme, each of the first screen mechanism 18, the second screen mechanism 19, and the third screen mechanism 2 has an independent diversion box 26 below it. The diversion box 26 is made of polypropylene and guides particles of different sizes to their corresponding discharge ports. The diversion box is connected to the screen mechanism via a flexible canvas to reduce vibration transmission. The discharge port is equipped with an electric regulating valve, which can adjust the discharge rate according to production needs.

[0024] In the above scheme, the baffle 22 is fitted into the opening of the outer casing 21 and locked in place by the bolt assembly 27. The baffle 22 is 5mm thick and is fitted with the opening of the outer casing 21 using a mortise and tenon structure with a gap ≤0.5mm. The bolt assembly 27 is an M8×20mm hexagon socket head cap screw. A rubber sealing strip is provided on the inner side of the baffle to prevent material leakage.

[0025] In the above scheme, the vibration motor 12 is connected to the power supply and the switch via wires. The power switch is a circuit breaker with overload protection and a set current of 20A. When the vibration motor is overloaded, it automatically cuts off the power supply to protect the equipment.

[0026] In the above scheme, the inclination angle of the frame 1 is 30-60 degrees. The frame 1 is welded from Q235 steel, the support spring 13 is made of 65Mn spring steel, and the hydraulic cylinder 15 has a stroke of 150mm. The inclination angle of 30°-60° is designed based on the angle of repose of straw particles (approximately 35°), ensuring that the sliding speed of the material on the screen is moderate, neither too fast leading to insufficient screening, nor too slow affecting the processing capacity.

[0027] Working principle:

[0028] This straw pellet fuel cooling and screening device transports straw pellets to the feed end of frame 1 via conveyor belt 11. The vibration force generated by vibrating motor 12 causes the pellets to jump forward along the inclined screen surface. The first screen mechanism 18 (2mm screen aperture) separates fine particles, the second screen mechanism 19 (5mm screen aperture) separates medium particles, and the third screen mechanism 2 (8mm screen aperture) separates coarse particles, which fall into their respective distribution boxes 26. Support springs 13 and hydraulic cylinders 15 work together to quickly adjust the tilt angle of frame 1 to adapt to materials with different moisture contents and particle size distributions. When maintenance is required, loosening bolt assembly 27 allows the inner shell 23 to be pulled out for cleaning or screen replacement; the replacement time for a single screen is ≤10 minutes. Collection box 16 collects the final product, ensuring a controllable production process.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling and screening device for straw pellet fuel, comprising a frame (1) arranged obliquely, characterized in that: The frame (1) is provided with a vibration motor (12), the bottom of both ends of the frame (1) is connected with support columns (14) of different heights through support springs (13), the bottom of the support columns (14) is provided with hydraulic cylinders (15), the inside of the frame (1) is provided with a connecting plate (17) for mounting a screening assembly, the screening assembly comprises first screen mechanism (18), second screen mechanism (19) and third screen mechanism (2) which are arranged transversely in sequence and have screen hole diameters increasing in sequence, the first screen mechanism (18), the second screen mechanism (19) and the third screen mechanism (2) all comprise a detachable outer shell (21) and a baffle (22), an inner shell (23) with a built-in screen is mounted in the outer shell (21), the outer side of the inner shell (23) is clamped in the clamping groove (24) formed in the inner side of the outer shell (21) and the baffle (22), the side of the outer shell (21) is provided with a connecting block (25) which is detachably connected with the connecting plate (17).

2. The cooling and screening device for straw pellet fuel according to claim 1, characterized in that: The frame (1) is provided with a conveying belt (11) above.

3. The cooling and screening device for straw pellet fuel according to claim 1, characterized in that: The frame (1) is provided with a collecting box (16) below the tail end.

4. The cooling and screening device for straw pellet fuel according to claim 1, characterized in that: The first screen mechanism (18), the second screen mechanism (19) and the third screen mechanism (2) are correspondingly provided with independent shunt boxes (26) below.

5. The straw pellet fuel cooling and screening device according to claim 1, characterized in that: The baffle (22) is clamped in the opening of the outer shell (21) and is locked and fixed through a bolt assembly (27).

6. The straw pellet fuel cooling and screening device according to claim 1, characterized in that: The vibration motor (12) is connected with a power supply and a switch through wires.

7. The straw pellet fuel cooling and screening device according to claim 1, characterized in that: The inclination angle of the frame (1) is 30-60 degrees.

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