Material flattening device for straw board production

Abstract

The invention belongs to the field of straw plate production equipment, and particularly relates to a material flattening device for straw plate production, which comprises a workbench, a coaxial double-cavity roller driven by a first driving motor through a portal frame and an L-shaped scraper array, L-shaped scrapers are uniformly distributed in the circumferential direction of the roller at 120 degrees and are axially distributed in a multi-layer staggered manner at 60 degrees, and the L-shaped scrapers are arranged on the workbench. A screening channel integrated with a screen is arranged in each L-shaped scraper, and materials can be sorted during scraping: large particles enter an inner-layer conveying cavity through an upper channel and are conveyed to a crusher through a spiral blade; the small particles fall into an outer-layer collecting cavity through a lower channel and are blown to a material conveying bin by an end fan; in addition, an independent vibration anti-blocking mechanism is arranged, a second driving motor drives a protruding block on a rotating wheel to periodically push a protruding part on the material conveying bin, and the material conveying bin overcomes the elastic force of a spring to horizontally shake on the portal frame so as to prevent blocking. Integrated continuous operation of scraping, screening, branch conveying and treatment is achieved, efficiency is greatly improved, and energy consumption is reduced.

Description

Technical Field

[0001] This invention belongs to the field of straw board production equipment, and in particular relates to a material leveling device for straw board production. Background Technology

[0002] As an environmentally friendly and renewable building and decoration material, the production process of straw board usually involves multiple steps such as crushing, mixing, leveling, and hot pressing of straw materials. Among them, the leveling of materials is the key process to ensure that the thickness of the board is uniform, the density is consistent and the quality is stable. In this process, the straw fragments mixed with adhesive need to be laid on the workbench to a predetermined thickness, and the excess material on the workbench is scraped off using a leveling device.

[0003] Currently, the leveling devices commonly used in the industry have relatively simple functions, mainly focusing on completing the basic action of "leveling." Existing technologies have significant limitations in handling the scraped material. Some crude methods involve collecting all scraped material, regardless of its particle size or whether it has reached the required fineness, and sending it to a crusher for overall crushing. This "one-size-fits-all" approach has several drawbacks: First, for fine materials that already meet the process requirements, this is unnecessary reprocessing, resulting in wasted energy consumption and accelerated wear on crusher hammers, screens, and other vulnerable parts, increasing production costs. Second, since all materials must enter the crushing process, it inherently increases the cost of... The processing load and operation time of each step reduce overall production efficiency. Although some improved processes recognize the importance of material classification, the sorting, conveying, and crushing steps are often carried out intermittently on different equipment and at different workstations. For example, it may be necessary to collect materials first, then sort them through separate screening equipment, then transfer large particles to a crusher, and finally transport the processed materials and qualified fine materials to the next step. This "decentralized processing" mode leads to the fragmentation of the production process. Materials need to undergo multiple transfers, lifting, and temporary storage, which not only makes the equipment layout complex and occupies a large area, but also makes it difficult to achieve efficient and continuous assembly line operation, while increasing the risk of material residue and cross-contamination.

[0004] In summary, whether it is simple and extensive overall processing or scattered and intermittent multi-stage processing, existing technologies have failed to achieve synchronous, continuous, and automated real-time sorting and differentiated treatment of materials at the leveling station. This technical bottleneck restricts the improvement of the automation and intelligence level of the production line and cannot meet the urgent requirements of modern manufacturing industry for intensive production processes, energy saving and consumption reduction and efficiency maximization. Therefore, developing a high-efficiency and continuous operation device that integrates leveling, sorting, classification and conveying has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to address the problems mentioned in the background art by providing a material leveling device for straw board production that integrates scraping, sorting, classification, and conveying.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a material leveling device for straw board production, comprising a workbench, a coaxial double-cavity roller, a first drive motor, an L-shaped scraper array, spiral conveying blades, a crusher, a fan, a material conveying bin, and a gantry frame;

[0007] The workbench is used to support the straw material to be laid flat;

[0008] The gantry frame is fixedly installed on the ground;

[0009] The coaxial dual-cavity roller is rotatably supported on the gantry frame by bearings at both ends and suspended above the worktable. It is driven by the first drive motor to rotate around its own axis. The coaxial dual-cavity roller has an inner conveying cavity and an outer collecting cavity that are isolated from each other.

[0010] The L-shaped scraper array consists of multiple L-shaped scrapers, which are fixedly installed on the coaxial double-cavity drum and rotate with it to scrape the material on the worktable. The L-shaped scrapers are provided with screening channels inside to screen the scraped material and guide large particles to the inner conveying cavity and small particles to the outer collection cavity.

[0011] The spiral conveying blades are fixedly mounted on the drum shaft inside the inner conveying cavity, and are used to convey large particles of material to the crusher.

[0012] The fan is used to provide airflow to transport small particulate materials that enter the outer collection chamber to the conveying bin;

[0013] The discharge port of the crusher is connected to the conveying hopper.

[0014] Furthermore, the L-shaped scraper array is arranged in an array in the circumferential and axial directions of the coaxial double-cavity roller;

[0015] In the circumferential direction, the L-shaped scrapers are arranged in a radial and uniform array with the center of the coaxial double-cavity roller as the center, and the central angle between two adjacent L-shaped scrapers is 120 degrees.

[0016] In the axial direction, the L-shaped scraper forms a multi-layer scraper layer, including a first scraper layer and a second scraper layer that are alternately arranged in the axial space; the L-shaped scrapers in the first scraper layer and the L-shaped scrapers in the second scraper layer are 60 degrees out of phase in the circumferential direction.

[0017] Furthermore, the L-shaped scraper includes a transverse section for scraping material and a longitudinal section connected to the transverse section; the interior of the longitudinal section is divided into an upper channel and a lower channel by a screen; the longitudinal section extends radially inward, and its end penetrates the inner drum wall of the coaxial double-cavity drum in an insertion manner, so that the outlet of the upper channel is connected to the inner conveying cavity, and the outlet of the lower channel is connected to the outer collecting cavity.

[0018] Furthermore, the mesh size of the screen is set according to the required particle size of the straw material.

[0019] Furthermore, the output shaft of the first drive motor is coaxially and fixedly connected to the rotating shaft of the coaxial double-cavity roller, driving the spiral conveyor blades to rotate synchronously.

[0020] Furthermore, the fan is fixedly installed at the first end of the coaxial dual-cavity roller to provide positive airflow into the outer collection cavity; the second end of the coaxial dual-cavity roller is provided with an outer material outlet communicating with the outer collection cavity, and the outer material outlet is connected to the conveying bin through a feeding pipe.

[0021] Furthermore, it also includes an independent vibration anti-blocking mechanism; the vibration anti-blocking mechanism includes a second drive motor, a rotating wheel driven by the second drive motor, and a protrusion provided on the side wall of the conveying bin; the wheel surface of the rotating wheel is provided with a protrusion; the conveying bin is mounted on the gantry by at least one spring; when the second drive motor drives the rotating wheel to rotate, the protrusion periodically reaches the position directly opposite the protrusion and contacts it during the rotation cycle, pushing the conveying bin to overcome the elastic force of the spring and generate horizontal swaying.

[0022] Furthermore, the spring is a helical spring, a rubber spring, or an air spring.

[0023] Furthermore, a wear-resistant material layer is provided on the surface where the bump and the protrusion come into contact with each other.

[0024] Compared with existing technologies, the advantages of this straw board production material leveling device are:

[0025] 1. This invention integrates the three major functions of material scraping, screening, and classification collection into a continuous rotating motion by setting up a coaxial double-cavity drum and an L-shaped scraper array with an integrated screening channel. This replaces the traditional mode of multiple independent devices operating in steps, achieving a high degree of integration and seamless connection of the production process, and greatly improving work efficiency.

[0026] 2. This invention achieves instant and precise screening of materials at the moment they are scraped up by using a screen installed inside the longitudinal section of the L-shaped scraper. This design ensures that qualified fine materials are directly separated and conveyed, while large particles that do not meet the requirements are only targeted for crushing, fundamentally avoiding repeated processing and significantly reducing the energy consumption and wear of the crusher.

[0027] 3. This invention constructs independent and parallel conveying paths for materials of different particle sizes by setting up an inner conveying chamber and an outer collecting chamber that are isolated from each other, and configuring spiral conveying blades and a fan pneumatic conveying system respectively. This branching processing mechanism allows the conveying and subsequent processing of materials of different sizes to be carried out simultaneously without interference, further ensuring the continuity and efficiency of the entire process.

[0028] 4. This invention, by setting up an independent vibration anti-blocking mechanism composed of a second drive motor, a rotating wheel, protrusions, and springs, and applying it to the conveying hopper, can actively and effectively prevent material from accumulating and blocking within the hopper. This mechanism utilizes periodic mechanical impact to generate horizontal shaking, ensuring smooth and stable material discharge and guaranteeing the reliability of continuous production.

[0029] 5. By setting up the above-mentioned integrated solution, the present invention achieves the direct conversion and closed-loop operation of the entire process from raw material scraping to qualified material recycling through "scraping and separating, processing and precision processing" of scraped materials. It integrates the originally scattered processes into a highly efficient and continuous system, fundamentally improves production efficiency, significantly reduces energy and material consumption in the process, effectively reduces dust emission, and optimizes the production environment. Attached Figure Description

[0030] Figure 1 This is an isometric drawing of a material leveling device for straw board production provided by the present invention;

[0031] Figure 2 This is a rear view structural schematic diagram of a material leveling device for straw board production provided by the present invention;

[0032] Figure 3 This is a detailed diagram of the coaxial double-cavity roller and L-shaped scraper array structure of a material leveling device for straw board production provided by the present invention;

[0033] Figure 4 This is a rear view of the coaxial double-cavity roller of a material leveling device for straw board production provided by the present invention;

[0034] Figure 5 This is a schematic diagram of a coaxial double-cavity roller structure for a material leveling device for straw board production provided by the present invention;

[0035] Figure 6This is a detailed structural diagram of the vibration anti-clogging mechanism of a material leveling device for straw board production provided by the present invention.

[0036] In the diagram, 1. Workbench; 2. Coaxial double-cavity drum; 21. Inner conveying cavity; 22. Outer collecting cavity; 23. Outer material outlet; 3. First drive motor; 4. L-shaped scraper array; 41. L-shaped scraper; 411. Transverse section; 412. Longitudinal section; 4121. Upper channel; 4122. Screen; 4123. Lower channel; 5. Spiral conveyor blades; 6. Crusher; 7. Fan; 8. Conveying hopper; 81. Protrusion; 9. Gantry frame; 10. Second drive motor; 101. Rotary wheel; 102. Protrusion; 103. Spring. Detailed Implementation

[0037] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0038] like Figure 1-3 As shown, a material leveling device for straw board production includes: a workbench 1, a coaxial double-cavity roller 2, a first drive motor 3, an L-shaped scraper array 4, a spiral conveyor blade 5, a crusher 6, a fan 7, a material conveying bin 8, and a gantry frame 9. The workbench 1 is used to support the straw material to be leveled. The gantry frame 9 is fixedly set on the ground. The coaxial double-cavity roller 2 is rotatably supported on the gantry frame 9 through the bearings at both ends of its shafts and is suspended above the workbench 1.

[0039] The coaxial double-cavity roller 2 is driven by the first drive motor 3 to rotate around its own axis. The output shaft of the first drive motor 3 is coaxially and fixedly connected to the rotation shaft of the coaxial double-cavity roller 2. The coaxial double-cavity roller 2 has an inner conveying cavity 21 and an outer collecting cavity 22 that are isolated from each other.

[0040] The L-shaped scraper array 4 consists of multiple L-shaped scrapers 41, which are fixedly installed on the coaxial double-cavity roller 2 and rotate with it to scrape the material on the worktable 1.

[0041] These L-shaped scrapers 41 are arranged in a specific array in the circumferential and axial directions of the coaxial double-cavity drum 2:

[0042] In the circumferential direction, they are arranged in a radial, uniform array with the center of the roller as the center, and the central angle between adjacent scrapers is 120 degrees;

[0043] In the axial direction, they constitute multiple scraper layers, including a first scraper layer and a second scraper layer that are spatially alternately arranged, and the scrapers in these two layers are 60 degrees out of phase in the circumferential direction.

[0044] Each L-shaped scraper 41 is a key functional component, comprising a transverse section 411 for scraping material and a longitudinal section 412 connected to the transverse section. The longitudinal section 412 is divided into an upper channel 4121 and a lower channel 4123 by a screen 4122. The mesh size of the screen 4122 is set according to the required particle size of the straw material. The longitudinal section 412 extends radially inward, and its end penetrates the inner drum wall of the coaxial double-cavity drum 2 in an insert manner, so that the outlet of the upper channel 4121 is connected to the inner conveying chamber 21, and the outlet of the lower channel 4123 is connected to the outer collection chamber 22. Thus, the L-shaped scraper 41 can immediately screen the material while scraping, guiding large particles to the inner conveying chamber 21 and small particles to the outer collection chamber 22.

[0045] For large particles entering the inner conveying chamber 21, the spiral conveying blades 5, which are fixedly installed on the roller shaft inside the chamber, are conveyed to the discharge port at one end. The first drive motor 3 simultaneously drives the spiral conveying blades 5 to rotate synchronously, and the large particles are finally sent into the crusher 6 for crushing.

[0046] For small particles entering the outer collection chamber 22, the fan 7 provides airflow for conveying. The fan 7 is fixedly installed at the first end of the coaxial double-chamber roller 2 and is used to provide positive airflow into the outer collection chamber 22. The second end of the coaxial double-chamber roller 2 is provided with an outer material outlet 23 that communicates with the outer collection chamber 22. The outer material outlet 23 is connected to the conveying bin 8 through a feeding pipe, and the small particles are directly conveyed to the conveying bin.

[0047] The discharge port of the crusher 6 is also eventually connected to the conveying bin 8, so that all the processed materials are collected here.

[0048] In addition, the device also includes an independent vibration anti-blocking mechanism to prevent the conveying bin 8 from clogging. The mechanism includes a second drive motor 10, a rotating wheel 101 driven by the motor, and a protrusion 81 provided on the side wall of the conveying bin 8. The rotating wheel 101 has a protrusion 102 on its wheel surface. The conveying bin 8 is mounted on the gantry 9 by at least one spring 103. When the second drive motor 10 drives the rotating wheel 101 to rotate, the protrusion 102 periodically reaches the position directly opposite the protrusion 81 and contacts it during the rotation cycle, pushing the conveying bin 8 to overcome the elastic force of the spring 103 and generate horizontal sway. The spring 103 can be a helical spring, a rubber spring, or an air spring. To further improve durability, a wear-resistant material layer can be provided on the surfaces where the protrusion 102 and the protrusion 81 contact each other.

[0049] In actual work, the mixed straw material is conveyed and spread evenly on the fixed workbench 1. The first drive motor 3 is started and driven to rotate through its coaxial connection with the coaxial double-cavity roller 2. The L-shaped scraper array 4 fixedly installed on the roller rotates accordingly, and the transverse section 411 of the L-shaped scraper 41 begins to scrape the excess material on the workbench 1 to complete the leveling operation.

[0050] The scraped material is gradually lifted as the coaxial double-cavity drum 2 rotates, and finally falls from the transverse section 411 into the longitudinal section 412, and then enters the screening channel inside the L-shaped scraper 41. During the rotation of the drum, fine particles are screened out through the screen 4122 in the longitudinal section 412 and fall into the lower channel 4123, and finally enter the outer collection chamber 22; while large particles that fail to pass through the screen are retained in the upper channel 4121 and are conveyed to the end as the scraper rotates, and are introduced into the inner conveying chamber 21 of the drum through the insertion connection port. This process completes the precise classification of materials instantly while scraping them flat.

[0051] Subsequently, the large particles entering the inner conveying chamber 21 are axially conveyed to the discharge port at one end of the drum by the push of the spiral conveying blades 5 fixed on the drum shaft, and fall into the crusher 6 for crushing. The qualified fine materials collected in the outer collecting chamber 22 are blown to the outer material outlet 23 at the other end of the drum by the positive airflow generated by the fan 7 fixed at the other end of the drum, and are directly and continuously conveyed to the conveying bin 8 through the feeding pipe.

[0052] The material processed by the crusher 6 also enters the conveying bin 8 through the conveying device, where it merges with the fine material directly conveyed. At the same time, the independent vibration anti-blocking mechanism is activated, and the second drive motor 10 drives the rotating wheel 101 to rotate. The protrusions 102 on the rotating wheel periodically hit the protrusions 81 on the conveying bin 8, causing the conveying bin to overcome the elastic force of the spring 103 and generate horizontal swaying, effectively preventing the material from accumulating or bridging in the bin and ensuring smooth material discharge.

[0053] The uniform material that has been graded and dropped from the feeding hopper 8 can be transported back to the leveling workbench 1 for recycling, forming a closed, efficient and automated production cycle.

[0054] This invention innovatively integrates material leveling, immediate screening, and classified collection into a single continuous operation by setting up an integrated L-shaped scraper array with a coaxial double-cavity drum and an integrated screen, achieving a high degree of integration in the production process. This design, by performing particle size sorting inside the scraper, allows qualified fine materials to be directly conveyed while only large particles are specifically crushed, fundamentally avoiding repeated processing and significantly reducing energy consumption and equipment wear. By constructing independent inner and outer cavities and matching screw conveyor and pneumatic conveying systems, parallel conveying channels are established for materials of different particle sizes, ensuring continuous and efficient processing. A specially designed independent vibration anti-clogging mechanism uses periodic mechanical impact to induce horizontal shaking in the conveying hopper, effectively solving the material blockage problem and ensuring production stability. Ultimately, this integrated design scheme of "immediate scraping and separation, and separate processing" significantly improves production efficiency while achieving comprehensive benefits such as energy saving, cost reduction, and optimized working environment.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A material leveling device for straw board production, characterized in that, include: Workbench (1), coaxial double-cavity drum (2), first drive motor (3), L-shaped scraper array (4), spiral conveyor blades (5), crusher (6), fan (7), conveying bin (8) and gantry (9); The workbench (1) is used to support the straw material to be laid flat; The gantry frame (9) is fixedly installed on the ground; The coaxial double-cavity roller (2) is rotatably supported on the gantry frame (9) by the bearings at both ends and suspended above the worktable (1), and is driven by the first drive motor (3) to rotate around its own axis; the coaxial double-cavity roller (2) has an inner conveying cavity (21) and an outer collecting cavity (22) that are isolated from each other. The L-shaped scraper array (4) consists of multiple L-shaped scrapers (41), which are fixedly installed on the coaxial double-cavity roller (2) and rotate with it to scrape the material on the worktable (1). The L-shaped scraper (41) has a screening channel inside, which is used to screen the scraped material and guide large particles to the inner conveying cavity (21) and small particles to the outer collection cavity (22). The spiral conveying blades (5) are fixedly mounted on the drum shaft inside the inner conveying cavity (21) to convey large particles of material to the crusher (6). The fan (7) is used to provide airflow to transport small particulate materials that enter the outer collection chamber (22) to the conveying bin (8). The discharge port of the crusher (6) is connected to the conveying bin (8).

2. The material leveling device for straw board production according to claim 1, characterized in that, The L-shaped scraper array (4) is arranged in an array in the circumferential and axial directions of the coaxial double-cavity roller (2); In the circumferential direction, the L-shaped scrapers (41) are arranged in a radial and uniform array with the center of the coaxial double-cavity roller (2) as the center, and the central angle between two adjacent L-shaped scrapers (41) is 120 degrees. In the axial direction, the L-shaped scraper (41) constitutes a multi-layer scraper layer, including a first scraper layer and a second scraper layer that are alternately arranged in the axial space; the L-shaped scraper (41) in the first scraper layer and the L-shaped scraper (41) in the second scraper layer are 60 degrees out of phase in the circumferential direction.

3. The material leveling device for straw board production according to claim 2, characterized in that, The L-shaped scraper (41) includes a transverse section (411) for scraping material and a longitudinal section (412) connected to the transverse section (411); the interior of the longitudinal section (412) is divided by a screen (4122) to form an upper channel (4121) and a lower channel (4123); the longitudinal section (412) extends radially inward, and its end penetrates the inner roller wall of the coaxial double-cavity roller (2) in an insert manner, so that the outlet of the upper channel (4121) is connected to the inner conveying cavity (21), and the outlet of the lower channel (4123) is connected to the outer collecting cavity (22).

4. The material leveling device for straw board production according to claim 3, characterized in that, The mesh size of the sieve (4122) is set according to the required particle size of the straw material.

5. The material leveling device for straw board production according to claim 1, characterized in that, The output shaft of the first drive motor (3) is coaxially and fixedly connected to the rotating shaft of the coaxial double-cavity roller (2), driving the spiral conveying blade (5) to rotate synchronously.

6. The material leveling device for straw board production according to claim 2, characterized in that, The fan (7) is fixedly installed at the first end of the coaxial double-cavity roller (2) and is used to provide positive airflow into the outer collection cavity (22); the second end of the coaxial double-cavity roller (2) is provided with an outer material outlet (23) that communicates with the outer collection cavity (22), and the outer material outlet (23) is connected to the conveying bin (8) through a feeding pipe.

7. The material leveling device for straw board production according to claim 2, characterized in that, It also includes an independent vibration anti-blocking mechanism; the vibration anti-blocking mechanism includes a second drive motor (10), a rotating wheel (101) driven by the second drive motor (10), and a protrusion (81) provided on the side wall of the conveying bin (8); the rotating wheel (101) has a protrusion (102) on its wheel surface; the conveying bin (8) is mounted on the gantry (9) by at least one spring (103); when the second drive motor (10) drives the rotating wheel (101) to rotate, the protrusion (102) periodically reaches the position opposite to the protrusion (81) and contacts it during the rotation cycle, pushing the conveying bin (8) to overcome the elastic force of the spring (103) and generate horizontal swaying.

8. The material leveling device for straw board production according to claim 7, characterized in that, The spring (103) is a helical spring, a rubber spring, or an air spring.

9. The material leveling device for straw board production according to claim 7, characterized in that, A wear-resistant material layer is provided on the surface where the bump (102) and the protrusion (81) are in contact with each other.

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