Raw material crushing equipment for biomass pellet fuel production

Abstract

The utility model provides a raw material crushing equipment for biomass pellet fuel production relates to the technical field of crushing equipment, including the crushing shell, the inside of crushing shell is provided with the crushing mechanism, and the crushing mechanism includes the drive rod, and the one end of two drive rods is symmetrically distributed and is connected with the one side inner wall of crushing shell through bearing rotation, can let drive rod drive the relative rotation of crushing roller through two meshing gear, and the raw material is efficiently completed, and the second servo motor drives sleeve and screen cylinder rotation through worm, worm wheel, realizes the automatic screening of the raw material after crushing, does not need manual screening, reduces the labor intensity, and the blocking of the through slot is removed by servo electric cylinder drive baffle post ascending, and the raw material of big particle gathers in the middle because of the bottom end inverted taper structure of screen cylinder and is discharged from the through slot and is collected, and the baffle post can descend and reset after discharging, the whole process is high in degree of automation, guarantees the screening quality, and the effect that the biomass pellet fuel raw material crushing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of crushing equipment technology, and in particular to a raw material crushing equipment for biomass pellet fuel production. Background Technology

[0002] Biomass fuel is a block-shaped environmentally friendly new energy source produced by processing straw, rice straw, rice husks, peanut shells, corn cobs, camellia shells, cottonseed husks, and other "three wastes". In order to meet the requirements for biomass fuel particle size, the raw materials for biomass pellet fuel need to be crushed to meet the particle size requirements. Current crushing equipment only has a crushing mechanism and cannot screen the crushed particles to ensure that the particle size of the crushed particles meets the requirements.

[0003] For example, a raw material crushing device for biomass pellet fuel production disclosed in Chinese patent literature (announcement number: CN218339902U) uses a screen to screen the crushed biomass pellet fuel and then re-crush the biomass pellet fuel that does not meet the requirements after screening. This process screens the crushed pellets and ensures that the particle size of the crushed pellets meets the requirements, which greatly improves the output quality of biomass pellet fuel.

[0004] However, relying on manual operation to hold the first handle and slide the screen left and right along the guide rod to achieve screening, the amount of material screened at one time after the biomass raw material is crushed is relatively large. The operator needs to continuously apply pushing force to complete the reciprocating sliding. Long-term operation can easily lead to muscle strain in the arms and the labor intensity is extremely high. Moreover, when the amount of substandard large particles accumulated above the screen increases, it will block the screen holes and increase the sliding resistance. At this time, the machine needs to be stopped for cleaning, which leads to the problem of cumbersome operation. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the cumbersome operation and high manual labor requirements in screening crushed raw materials.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A raw material crushing device for biomass pellet fuel production includes a crushing shell, and a crushing mechanism is provided inside the crushing shell. The crushing mechanism includes drive rods. One end of two drive rods is symmetrically distributed and rotatably connected to one side inner wall of the crushing housing via bearings. A crushing roller is fixedly sleeved on the outside of the drive rod. The other end of the drive rod extends through to one side of the crushing housing and is slidably sleeved with a gear. The teeth of the two gears mesh with each other. The front inner wall and rear inner wall of the crushing housing are fixedly connected to symmetrically distributed guide plates. The lower end of the crushing housing is fixedly connected to a conveying square tube. An automatic screening mechanism is provided below the crushing shell.

[0007] Preferably, a support frame is fixedly connected to one side of the crushing shell, and a first servo motor is fixedly installed at the upper end of the support frame. The output shaft of the first servo motor is fixedly connected to the other end of one of the drive rods through a coupling.

[0008] Preferably, the automatic screening mechanism includes a screening box, the upper end of which is fixedly connected to the lower end of the conveying square tube, and a drive sleeve is rotatably connected to the inner wall of the upper end of the screening box via a bearing, and a worm gear is fixedly sleeved on the upper end of the drive sleeve.

[0009] Preferably, a screening cylinder is fixedly sleeved on the outside of the drive sleeve, the lower end of the drive sleeve extends through to the bottom of the screening box, and a support plate is rotatably connected to the outside of the screening cylinder via a bearing. The outside of the support plate is fixedly sleeved with the inner wall of the screening box.

[0010] Preferably, the outer side of the drive sleeve is provided with through slots arranged in a ring array, and a stop post is slidably sleeved on the inner wall of the drive sleeve. The upper end of the stop post is rotatably connected to a movable rod through a bearing, and one end of the movable rod extends through to the top of the drive sleeve and is fixedly connected to a movable plate.

[0011] Preferably, a symmetrically distributed servo electric cylinder is fixedly installed at the upper end of the screening box, and one end of the piston rod of each of the two servo electric cylinders is fixedly connected to the lower end of the movable plate. A second servo motor is fixedly installed at the upper end of the screening box, and a worm gear is fixedly installed on the output shaft of the second servo motor through a coupling. The outer surface of the worm gear meshes with the tooth surface of the worm wheel.

[0012] Preferably, a confluence hopper is fixedly connected to the inner top wall of the screening box, a discharge chute is opened on one side of the screening box, a sealing door is provided on the front of the screening box, and an observation window is provided on the front of the sealing door.

[0013] Compared with the prior art, the beneficial effects of this utility model are: In this invention, two meshing gears enable the drive rod to rotate the crushing rollers relative to each other, efficiently crushing the raw materials. The guide plate guides the raw materials to feed into the center of the crushing rollers, and the second servo motor drives the drive sleeve and screening cylinder to rotate via a worm gear and worm wheel, achieving automatic screening of the crushed raw materials. Qualified raw materials are discharged from the discharge trough through the inclined inner bottom wall of the screening cylinder, eliminating the need for manual screening and reducing labor intensity. The servo electric cylinder drives the baffle column to rise, releasing the obstruction to the through trough. Large particles of raw materials converge towards the center due to the inverted conical structure at the bottom of the screening cylinder and are discharged and collected from the through trough. After discharge, the baffle column can be lowered and reset. The entire process is highly automated, ensuring screening quality and improving the crushing efficiency of biomass pellet fuel raw materials. Attached Figure Description

[0014] Figure 1 A schematic diagram of the main structure of a raw material crushing device for biomass pellet fuel production provided by this utility model; Figure 2 An exploded view of the crushing shell structure of a raw material crushing device for biomass pellet fuel production provided by this utility model; Figure 3 A three-dimensional view of the screening box structure of a raw material crushing device for biomass pellet fuel production provided by this utility model; Figure 4 An exploded view of the drive sleeve structure of a raw material crushing device for biomass pellet fuel production provided by this utility model.

[0015] Legend: 1. Crushing shell; 2. Drive rod; 21. Crushing roller; 22. Gear; 23. Guide plate; 24. Conveying square tube; 25. Support frame; 26. First servo motor; 3. Screening box; 31. Drive sleeve; 32. Worm gear; 33. Screening cylinder; 34. Support plate; 35. Through groove; 36. Baffle; 37. Movable rod; 38. Movable plate; 39. Servo electric cylinder; 310. Second servo motor; 311. Worm gear; 312. Converging hopper; 313. Discharge chute; 314. Sealing door; 315. Observation window. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Example like Figures 1-4 As shown, this utility model provides a technical solution: a raw material crushing device for biomass pellet fuel production, including a crushing shell 1 that provides a stable space for crushing raw materials, effectively preventing raw materials from splashing during the crushing process and ensuring a clean production environment. At the same time, its internal structure is reasonably designed so that the movement trajectory of the raw materials within it is more conducive to being captured and crushed by the crushing roller 21, thereby improving the stability and thoroughness of the crushing.

[0021] In the crushing mechanism, two drive rods 2 are connected to the crushing housing 1 through bearings. This connection method not only makes the drive rods 2 rotate more smoothly, but also can withstand the impact force during crushing and extend the service life of the drive rods 2. The surface of the crushing roller 21 can be set with specific tooth shape or texture to enhance the gripping and crushing ability of the raw materials, so that the raw materials can be crushed into smaller particles more efficiently, reducing the burden on subsequent screening.

[0022] Two meshing gears 22 can precisely control the rotation speed and direction of the two drive rods 2, ensuring that the two crushing rollers 21 always rotate relative to each other and synchronously. This allows the raw material to be subjected to uniform and continuous squeezing and shearing force between the two crushing rollers 21, improving the crushing quality and preventing some raw materials from being fully crushed.

[0023] The tilt angle and surface smoothness of the guide plate 23 have been optimized, which can not only guide the raw materials to gather in the middle of the crushing roller 21 smoothly, but also reduce the residue of raw materials on the guide plate 23, ensuring the conveying efficiency of raw materials and allowing the crushing process to continue stably.

[0024] The shape and size design of the conveying square tube 24 can adapt to the particle size of the crushed raw materials, ensuring smooth passage of the raw materials without blockage, and quickly conveying the crushed raw materials to the automatic screening mechanism, connecting the crushing and screening processes, and improving the overall production efficiency.

[0025] The support frame 25 provides stable support for the first servo motor 26. The first servo motor 26 can precisely adjust its speed. According to the hardness, toughness and other characteristics of different biomass raw materials, the rotation speed of the crushing roller 21 is adjusted to achieve the best crushing effect. At the same time, the servo motor runs smoothly, which can reduce the vibration and noise of the equipment and create a better production environment.

[0026] In the automatic screening mechanism, the confluence hopper 312 is funnel-shaped, which can quickly and centrally guide the raw materials sent by the conveying square tube 24 into the screening cylinder 33, avoiding the raw materials from being scattered and spilled, and making the raw materials more evenly distributed in the screening cylinder 33, thereby improving the uniformity and efficiency of screening.

[0027] The size of the screen holes on the screening cylinder 33 can be customized according to the particle size requirements of biomass pellet fuel, which can accurately screen out the particles that meet the requirements and ensure product quality. The support plate 34 supports the screening cylinder 33, so that the screening cylinder 33 will not shift or shake when rotating, ensuring the stability of the screening process and that the screen holes can always accurately screen the raw materials.

[0028] The sliding fit between the baffle 36 and the inner wall of the drive sleeve 31 is tight. When blocking the through groove 35, it can effectively prevent large particles of raw material from leaking out of the through groove 35 and ensure the accuracy of screening. When it is necessary to discharge large particles of raw material, the baffle 36 moves upward smoothly without jamming and can quickly release the obstruction of the through groove 35, so that the large particles of raw material can be discharged smoothly.

[0029] The servo electric cylinder 39 has precise and powerful extension and retraction movements, which can drive the movable plate 38, movable rod 37 and stop column 36 to rise and fall smoothly, so as to achieve precise control of the through groove 35. In addition, the servo electric cylinder 39 has a fast response speed and can act quickly according to the operator's instructions, improving the timeliness of large particle raw material discharge.

[0030] The second servo motor 310 drives the worm gear 311 to rotate. The meshing transmission between the worm gear 311 and the worm wheel 32 has a self-locking property, which can prevent the screening cylinder 33 from rotating without power drive, ensuring the stability of the screening process. At the same time, the transmission ratio of the worm gear transmission is large, which can enable the screening cylinder 33 to obtain a suitable rotation speed, allowing the raw materials to have enough time and space to be screened in the screening cylinder 33, thus improving the screening effect.

[0031] The inclined design of the inner bottom wall of the screening box 3 utilizes gravity to allow qualified raw materials to flow quickly to the discharge chute 313 without the need for additional power, saving energy. The moderate inclination angle ensures uniform flow speed of the raw materials and avoids accumulation. The sealing door 314 has good sealing performance, which can prevent raw material dust from leaking out during the screening process and protect the health of operators. At the same time, the sealing door 314 is easy to open and close, facilitating cleaning and maintenance of the interior of the screening box 3.

[0032] The observation window 315 is made of transparent and wear-resistant material, which can clearly show the accumulation of large particles inside the screening cylinder 33, allowing operators to keep abreast of the screening status and start the servo electric cylinder 39 to discharge large particles in a timely manner, ensuring the continuity and efficiency of screening.

[0033] It should be noted that the electrical components mentioned above are all existing mature technologies, and appropriate models and power can be selected based on the technical knowledge of those skilled in the art, so they will not be described in detail here.

[0034] The working process of this utility model: Step 1: Add biomass raw materials into the crushing shell 1. Under the guidance of the guide plate 23, the raw materials are fed into the middle of the two crushing rollers 21. Start the first servo motor 26. The output shaft of the first servo motor 26 rotates. Since the two gears 22 mesh with each other and one of the drive rods 2 is fixedly connected to the output shaft of the first servo motor 26, the two drive rods 2 will rotate relative to each other, thereby causing the two crushing rollers 21 to rotate relative to each other and crush the raw materials that have entered the middle. Step 2: The crushed raw material is conveyed to the screening box 3 through the conveying square tube 24. After being collected by the confluence bucket 312, it enters the screening cylinder 33. At the same time, the second servo motor 310 is started. The output shaft of the second servo motor 310 drives the worm 311 to rotate through the coupling. The worm 311 meshes with the worm wheel 32, thereby driving the worm wheel 32 to rotate. The worm wheel 32 is fixedly sleeved on the upper end of the drive sleeve 31, thereby causing the drive sleeve 31 to rotate. The drive sleeve 31 drives the screening cylinder 33 to rotate. During the rotation of the screening cylinder 33, the raw material with qualified particle size will fall from the screen holes of the screening cylinder 33 to the inner bottom wall of the screening box 3. Since the inner bottom wall of the screening box 3 is inclined, these qualified raw materials will be discharged along the inclined surface through the discharge trough 313 for collection. Step 3: The operator observes the remaining amount of large-particle raw material inside the screening cylinder 33 through the observation window 315 on the front of the sealed door 314. When there is a large amount of large-particle raw material remaining, the operator stops adding raw material to the crushing shell 1 and stops the first servo motor 26 to stop crushing new raw material. Then, the operator starts the servo electric cylinder 39. The piston rod of the servo electric cylinder 39 extends and pushes the movable plate 38 to move downward. The movable plate 38 drives the movable rod 37 to move. The movable rod 37 drives the baffle 36 to slide upward on the inner wall of the drive sleeve 31, so that the baffle 36 is removed from the obstruction of the external through groove 35 of the drive sleeve 31. Since the bottom of the screening cylinder 33 is inverted cone-shaped, the large-particle raw material will converge towards the middle and then enter the interior of the drive sleeve 31 through the through groove 35. Finally, it will be discharged from the lower end of the drive sleeve 31 for collection. Step four: After the large particles of raw material are discharged, the servo electric cylinder 39 is activated, causing its piston rod to retract and drive the movable plate 38, movable rod 37 and baffle 36 to move downward. The baffle 36 descends and resets, blocking the through groove 35 again. After that, raw material can be added to the crushing shell 1 again to continue the crushing and screening of biomass raw materials, thus realizing continuous production.

[0035] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0036] 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 raw material crushing device for biomass pellet fuel production, comprising a crushing shell (1), characterized in that: The crushing housing (1) is equipped with a crushing mechanism inside; The crushing mechanism includes drive rods (2), one end of the two drive rods (2) is symmetrically distributed and rotatably connected to one side inner wall of the crushing housing (1) through bearings, a crushing roller (21) is fixedly sleeved on the outside of the drive rods (2), and the other end of the drive rods (2) passes through to one side of the crushing housing (1) and is slidably sleeved with a gear (22), the tooth surfaces of the two gears (22) mesh with each other, the front inner wall and the rear inner wall of the crushing housing (1) are fixedly connected with symmetrically distributed guide plates (23), and the lower end of the crushing housing (1) is fixedly connected to a conveying square tube (24). An automatic screening mechanism is provided below the crushing shell (1); The automatic screening mechanism includes a screening box (3), the upper end of which is fixedly connected to the lower end of the conveying square tube (24), and the upper inner wall of the screening box (3) is rotatably connected to a drive sleeve (31) through a bearing. The upper end of the drive sleeve (31) is fixedly sleeved with a worm gear (32). The drive sleeve (31) is fixedly sleeved with a screening cylinder (33), and the lower end of the drive sleeve (31) extends through to the bottom of the screening box (3). The screening cylinder (33) is rotatably connected to a support plate (34) through a bearing, and the outside of the support plate (34) is fixedly sleeved with the inner wall of the screening box (3). The drive sleeve (31) has through slots (35) arranged in a ring array on its outer side. A stop post (36) is slidably sleeved on the inner wall of the drive sleeve (31). The upper end of the stop post (36) is rotatably connected to a movable rod (37) through a bearing. One end of the movable rod (37) extends through to the top of the drive sleeve (31) and is fixedly connected to a movable plate (38).

2. The raw material crushing equipment for biomass pellet fuel production according to claim 1, characterized in that: A support frame (25) is fixedly connected to one side of the crushing shell (1), and a first servo motor (26) is fixedly installed on the upper end of the support frame (25). The output shaft of the first servo motor (26) is fixedly connected to the other end of one of the drive rods (2) through a coupling.

3. The raw material crushing equipment for biomass pellet fuel production according to claim 1, characterized in that: The upper end of the screening box (3) is fixedly installed with symmetrically distributed servo electric cylinders (39). One end of the piston rod of each of the two servo electric cylinders (39) is fixedly connected to the lower end of the movable plate (38). The upper end of the screening box (3) is fixedly installed with a second servo motor (310). The output shaft of the second servo motor (310) is fixedly installed with a worm gear (311) through a coupling. The outer surface of the worm gear (311) meshes with the tooth surface of the worm wheel (32).

4. The raw material crushing equipment for biomass pellet fuel production according to claim 1, characterized in that: The inner top wall of the screening box (3) is fixedly connected to a confluence hopper (312), and a discharge trough (313) is opened on one side of the screening box (3). A sealing door (314) is provided on the front of the screening box (3), and an observation window (315) is provided on the front of the sealing door (314).

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