Wood shaving material paving equipment

Abstract

The utility model discloses wood shaving material paving equipment which comprises a conveying table and a paving chamber, and a feeding port is formed in one side of the top of the paving chamber; at least one centrifugal fan is arranged on the outer side, close to the feeding port, of the paving chamber, a first impedance combined type silencer is arranged at an air inlet of the centrifugal fan, and a second impedance combined type silencer is arranged at an air outlet of the centrifugal fan. The paving chamber is divided into a first paving cavity and a second paving cavity, a first paving opening is formed in the bottom of the first paving cavity, and a second paving opening is formed in the bottom of the second paving cavity; the top of the first paving cavity is an arc-shaped top wall; and sound-absorbing cotton and a dust screen are arranged on the inner side of the shell of the paving chamber. The air inlet and the air outlet of the centrifugal fan are both provided with the impedance composite silencers, and propagation of airflow noise is reduced. The arc-shaped top wall prevents airflow turbulence from occurring in the first paving cavity, and air turbulence noise is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of particleboard processing equipment, and in particular to a particleboard material laying equipment. Background Technology

[0002] In the particleboard production process, the spreading process involves mechanically dispersing the particleboard material evenly to avoid localized accumulation or gaps, ensuring a consistent density distribution in the board. The core purpose of spreading the particleboard material is to ensure the structural stability, physical properties, and surface quality of the final board by evenly and orderly distributing the particleboard particles. This prevents uneven internal density during hot pressing, which can lead to stress concentration, cracking, warping, or insufficient strength. By adjusting the particleboard particle distribution in different areas through the spreading process, the particleboard forms a structure of "high-density surface layer + low-density core layer." The high-density surface layer improves the board's wear resistance and impact resistance, while the low-density core layer reduces material consumption and maintains overall lightweight design. Uniform spreading ensures the isotropic nature of the board, avoiding strength differences caused by uniform fiber orientation. In existing technologies, the noise level of high-pressure fans and vibrating equipment in spreading equipment can reach over 85 dB. Noise pollution mainly originates from high-pressure fans, mechanical vibration, and airflow disturbances. Prolonged exposure to noisy environments can lead to decreased concentration, memory loss, fatigue, irritability, insomnia, and other health problems for workers. Furthermore, noise interference reduces worker efficiency and increases error rates, thus affecting particleboard production efficiency. Therefore, there is a need for particleboard laying equipment that can reduce noise and lay particleboard in layers. Utility Model Content

[0003] This utility model addresses the technical problem of excessive noise from the paving equipment during particleboard production, which affects workers and work efficiency. It provides a particleboard paving equipment, including a conveyor and a paving chamber, with a feed inlet on one side of the top of the paving chamber.

[0004] At least one centrifugal fan is provided on the outer side of the paving chamber near the feed inlet. Each centrifugal fan is connected to the paving chamber. A first impedance composite silencer is provided at the air inlet of the centrifugal fan, and a second impedance composite silencer is provided at the air outlet of the centrifugal fan.

[0005] The paving chamber is divided into a first paving chamber and a second paving chamber. The bottom of the first paving chamber is provided with a first paving opening, and the bottom of the second paving chamber is provided with a second paving opening.

[0006] The top of the first paving cavity is an arc-shaped top wall;

[0007] The inner side of the shell of the paving chamber is provided with sound-absorbing cotton and dust-proof netting, and the sound-absorbing cotton is attached to the surface.

[0008] Preferably, in the above technical solution, a first material feeding roller is provided in the first paving cavity, and the first material feeding roller is located above the first paving opening;

[0009] The second paving cavity is provided with a second material feeding roller, which is located above the second paving opening;

[0010] A second rotating disk is fixedly connected to one side of the rotating shaft of both the first and second feeding rollers, and the two second rotating disks are respectively arranged on the outside of the first paving cavity and the second paving cavity.

[0011] Preferably, in the above technical solution, the surfaces of the first material feeding roller and the second material feeding roller are uniformly provided with a plurality of material feeding teeth.

[0012] Preferably, in the above technical solution, a connecting crossbar is provided between the first paving cavity and the second paving cavity, and a second motor is fixedly connected to the connecting crossbar;

[0013] The second drive wheel is fixedly connected to the rotation output end of the second motor. The second drive wheel is connected to the second rotating disk on the first and second material handling rollers respectively via a transmission belt, thereby realizing the synchronous driving of the first and second material handling rollers.

[0014] Preferably, in the above technical solution, adaptive scrapers are fixedly connected to the bottom outer sides of both the first paving cavity and the second paving cavity;

[0015] The adaptive scraper includes a rotatable scraper and a connecting plate. The connecting plate has a rotating shaft on both sides, and the top of the rotatable scraper is movably connected to the connecting plate through the rotating shaft.

[0016] Preferably, in the above technical solution, the connecting plate is provided with spring chambers at both ends, and a retraction spring is provided in the spring chamber. One end of the retraction spring is fixedly connected to the bottom of the spring chamber, and the other end is fixedly connected to the rotatable scraper.

[0017] Preferably, in the above technical solution, a first motor is fixedly connected to the top of the paving chamber, and a first drive wheel is fixedly connected to the rotation output end of the first motor;

[0018] The bottom of the feed inlet is provided with a feeding roller, and a first rotating disk is fixedly connected to one side of the rotating shaft of the feeding roller. The first rotating disk and the first drive wheel are connected by a transmission belt, so that the feeding roller is driven to rotate by the first motor.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention reduces air turbulence noise inside a centrifugal fan by using a centrifugal fan. Impedance composite silencers are installed at both the inlet and outlet of the centrifugal fan. Through the synergistic effect of sound-absorbing materials consuming sound energy and sound wave reflection interference, the propagation of airflow noise is reduced, achieving effective attenuation of noise over a wide frequency range. The arc-shaped top wall prevents airflow turbulence within the first paving cavity, reducing any resulting air turbulence noise. The sound-absorbing cotton inside the shell of the paving chamber is filled with interconnected micropores, forming a complex mesh channel. This allows for efficient absorption of mid-to-high frequency noise through viscous friction and heat conduction within the porous structure.

[0021] The paving chamber is equipped with a first and a second paving cavity. Using airflow, the wood shavings are sorted according to their fineness and weight. The first paving cavity, farther from the centrifugal fan, contains finer shavings, while the second paving cavity, closer to the centrifugal fan, contains coarser shavings. This achieves "layered" paving. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a wood shavings paving equipment according to the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of a wood shavings paving device according to the present invention;

[0024] Figure 3 This is a schematic diagram of the shell structure in a wood shavings spreading device according to the present invention;

[0025] Figure 4 This is a schematic diagram of the adaptive scraper in a wood shavings spreading device according to the present invention;

[0026] Figure 5 for Figure 1 A magnified view of a section of the spring magazine;

[0027] Figure 6 This is a schematic diagram of the structure of the first or second material sorting roller in a wood shavings paving equipment according to the present invention.

[0028] Explanation of key figure labels:

[0029] 1-Conveyor table, 2-Feed inlet, 3-Paving chamber, 4-Centrifugal fan, 5-First motor, 11-Support leg, 21-First rotating disk, 22-Pushing roller, 31-Housing, 32-First paving cavity, 33-Second paving cavity, 35-Connecting crossbar, 36-Adaptive scraper, 41-First impedance composite silencer, 42-Second impedance composite silencer, 51-First drive wheel, 311-Sound absorbing cotton, 312-Dustproof net, 321-First paving opening, 322-First material feeding roller, 331-Second paving opening, 332-Second material feeding roller, 351-Second motor, 352-Second drive wheel, 353-Second rotating disk, 361-Rotable scraper, 362-Rotating shaft, 363-Spring chamber, 364-Connecting plate, 332a-Material feeding teeth, 363a-Contraction spring. Detailed Implementation

[0030] 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.

[0031] like Figures 1-6As shown, this utility model discloses a shavings material laying device, including a conveyor table 1 and a laying chamber 3. A feed inlet 2 is provided on one side of the top of the laying chamber 3. At least one centrifugal fan 4 is provided on the outer side of the laying chamber 3 near the feed inlet 2. Each centrifugal fan 4 is connected to the laying chamber 3. A first impedance composite silencer 41 is provided at the air inlet of the centrifugal fan 4, and a second impedance composite silencer 42 is provided at the air outlet of the centrifugal fan 4. The impedance composite silencer 42 is composed of a porous resistive sound-absorbing layer and a resistive expansion cavity / resonance cavity. When sound waves enter the porous material, especially mid-to-high frequency noise above 500Hz, the sound energy is converted into heat energy due to friction and viscosity. By utilizing the abrupt change in acoustic impedance to reflect sound waves, or by consuming low-frequency energy (approximately 100~500Hz) through a resonant cavity, mid-to-low frequency sound waves enter the reactive section. The expansion chamber forms interference cancellation through sound wave reflection. The reactive section covers high-frequency noise, and the reactive section covers mid-to-low frequency noise, which can reduce noise by 15-25dB(A). The paving chamber 3 is divided into a first paving cavity 32 and a second paving cavity 33. The bottom of the first paving cavity 32 is provided with a first paving opening 321, and the bottom of the second paving cavity 33 is provided with a second paving opening 331. The top of the first paving cavity 32 is an arc-shaped top wall. The inner side of the shell 31 of the paving chamber 3 is provided with sound-absorbing cotton 311 and a dustproof net 312, and the sound-absorbing cotton 311 is attached to the surface of the shell 31. The sound-absorbing cotton 311 utilizes its interconnected micropores. When sound waves strike the surface of the cotton, some energy is reflected, while the rest enters the pores. The vibration of the sound waves forces air to move at high speed within the pores, generating heat through friction with the fiber surface, thus creating a temperature gradient. The heat is dissipated through conduction by the fiber material. In this embodiment, in addition to sound-absorbing cotton, other sound-absorbing materials with good sound absorption properties can also be used, such as glass fiber cotton, rock wool, and polyester fiberboard. Of course, the open-cell structure of polyurethane foam or melamine foam can also be used to attenuate sound waves through multiple reflections within the pores, achieving sound absorption and noise reduction. The first paving cavity 32 is provided with a first material-sorting roller 322, which is located above the first paving opening 321; the second paving cavity 33 is provided with a second material-sorting roller 332, which is located above the second paving opening 331; a second rotating disk 353 is fixedly connected to one side of the rotating shaft of the first material-sorting roller 322 and the second material-sorting roller 332, and the two second rotating disks 353 are respectively arranged on the outside of the first paving cavity 32 and the second paving cavity 33.A connecting crossbar 35 is provided between the first paving cavity 32 and the second paving cavity 33. A second motor 351 is fixedly connected to the connecting crossbar 35. A second drive wheel 352 is fixedly connected to the rotation output end of the second motor 351. The second drive wheel 352 is connected to the second rotating disk 353 on the first material feeding roller 322 and the second material feeding roller 332 respectively via a conveyor belt, thereby realizing synchronous driving of the first material feeding roller 322 and the second material feeding roller 332. The surfaces of the first material feeding roller 322 and the second material feeding roller 332 are uniformly provided with a plurality of material feeding teeth 332a. A first motor 5 is fixedly connected to the top of the paving chamber 3. A first drive wheel 51 is fixedly connected to the rotation output end of the first motor 5. A material feeding roller 22 is provided at the bottom of the feed inlet 2. A first rotating disk 21 is fixedly connected to one side of the rotating shaft of the material feeding roller 22. The first rotating disk 21 and the first drive wheel 51 are connected via a conveyor belt, thereby driving the material feeding roller 22 to rotate by the first motor 5. During operation, wood shavings fall into the paving chamber 3 through the feed inlet 2. The first motor 5 is started, driving the feeding roller 22 to rotate via the conveyor belt, so that the wood shavings fall evenly from the feed inlet 2. Compared with gear and chain transmission, the conveyor belt can effectively reduce noise pollution. At this time, after the centrifugal fan 4 starts, the wood shavings will move horizontally according to their size and mass with the wind direction. Smaller and lighter materials will move further under the action of the wind and fall into the first paving chamber 32. Conversely, larger and heavier materials will move a shorter distance under the action of the wind and fall into the second paving chamber 33. The coarse and fine wood shavings are classified. When the conveyor belt 1 and the second motor 351 are started, the first and second feeding rollers 322 and 332, driven by the conveyor belt, will successively feed the fine material in the first feeding cavity 32 and the coarse material in the second feeding cavity 33. The feeding teeth 332a on the upper surface of the first and second feeding rollers 322 and 332 can straighten the direction of the material, so that it is laid in the same direction as much as possible, thereby improving the strength and flexibility of the particleboard. The second motor 351 drives the conveyor belt, which in turn drives the first and second feeding rollers 322 and 332 to rotate, which can further reduce the noise pollution generated by the conveying structure.

[0032] In this embodiment, as Figures 2-5As shown, adaptive scrapers 36 are fixedly connected to the bottom outer sides of both the first paving cavity 32 and the second paving cavity 33. Each adaptive scraper 36 includes a rotatable scraper 361 and a connecting plate 364. The connecting plate 364 has rotating shafts 362 on both sides, and the top of the rotatable scraper 361 is movably connected to the connecting plate 364 via the rotating shafts 362. Each end of the connecting plate 364 has a spring chamber 363, and each spring chamber 363 contains a contraction spring 363a. One end of the contraction spring 363a is fixedly connected to the bottom of the spring chamber 363, and the other end is fixedly connected to the rotatable scraper 361. Under the elastic force of the contraction spring 363a, the adaptive scraper 36 can adjust and adapt to the paving thickness, ensuring a flat surface and guaranteeing the structural stability, physical properties, and surface quality of the paving material.

[0033] This invention utilizes a centrifugal fan to reduce air turbulence noise within the fan. Impedance composite silencers are installed at both the fan's inlet and outlet. Through the synergistic effect of sound-absorbing materials consuming sound energy and sound wave reflection interference, the propagation of airflow noise is reduced, achieving effective attenuation of noise over a wide frequency range. The arc-shaped top wall within the paving chamber prevents airflow turbulence within the first paving chamber, reducing any resulting air turbulence noise. The sound-absorbing cotton within the shell of the paving chamber is filled with interconnected micropores, forming a complex mesh channel. This allows sound waves to efficiently absorb mid-to-high frequency noise through viscous friction and heat conduction within the porous structure. This reduces noise pollution during particleboard production and paving, providing a healthy production environment, promoting the physical and mental health of workshop workers, improving work efficiency, and ultimately increasing particleboard production efficiency.

[0034] The paving chamber is divided into a first paving cavity and a second paving cavity. Using airflow, the wood shavings are sorted according to their fineness and weight. The first paving cavity, farther from the centrifugal fan, contains finer wood shavings, while the second paving cavity, closer to the centrifugal fan, contains coarser wood shavings. This achieves "layered" paving, ensuring the structural stability, physical properties, and surface quality of the final particleboard through a uniform and orderly distribution of the wood shavings.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 wood shavings spreading device, characterized in that: It includes a conveyor (1) and a paving chamber (3), wherein a feed inlet (2) is provided on one side of the top of the paving chamber (3); At least one centrifugal fan (4) is provided on the outside of the paving chamber (3) near the feed inlet (2). Each centrifugal fan (4) is connected to the paving chamber (3). A first impedance composite silencer (41) is provided at the air inlet of the centrifugal fan (4), and a second impedance composite silencer (42) is provided at the air outlet of the centrifugal fan (4). The paving chamber (3) is divided into a first paving chamber (32) and a second paving chamber (33). The bottom of the first paving chamber (32) is provided with a first paving opening (321), and the bottom of the second paving chamber (33) is provided with a second paving opening (331). The top of the first paving cavity (32) is an arc-shaped top wall; The inner side of the shell (31) of the paving chamber (3) is provided with sound-absorbing cotton (311) and dustproof net (312), and the sound-absorbing cotton (311) is attached to the surface of the (31).

2. The wood shavings spreading equipment according to claim 1, characterized in that: The first paving cavity (32) is provided with a first material feeding roller (322), which is located above the first paving opening (321); The second paving cavity (33) is provided with a second material feeding roller (332), which is located above the second paving opening (331); A second rotating disk (353) is fixedly connected to one side of the rotating shaft of the first material feeding roller (322) and the second material feeding roller (332). The two second rotating disks (353) are respectively arranged on the outside of the first paving cavity (32) and the second paving cavity (33).

3. The wood shavings spreading equipment according to claim 2, characterized in that: Both the first feeding roller (322) and the second feeding roller (332) have a plurality of feeding teeth (332a) evenly distributed on their surfaces.

4. The wood shavings spreading equipment according to claim 2, characterized in that: A connecting crossbar (35) is provided between the first paving cavity (32) and the second paving cavity (33), and a second motor (351) is fixedly connected to the connecting crossbar (35). The second drive wheel (352) is fixedly connected to the rotation output end of the second motor (351). The second drive wheel (352) is connected to the second rotating disk (353) on the first material handling roller (322) and the second material handling roller (332) respectively via a transmission belt, thereby realizing the synchronous driving of the first material handling roller (322) and the second material handling roller (332).

5. The wood shavings spreading equipment according to claim 1, characterized in that: An adaptive scraper (36) is fixedly connected to the bottom outer side of both the first paving cavity (32) and the second paving cavity (33); The adaptive scraper (36) includes a rotatable scraper (361) and a connecting plate (364). The connecting plate (364) has a rotating shaft (362) on both sides. The top of the rotatable scraper (361) is movably connected to the connecting plate (364) through the rotating shaft (362).

6. The wood shavings spreading equipment according to claim 5, characterized in that: The connecting plate (364) has spring compartments (363) at both ends. A retraction spring (363a) is provided inside the spring compartment (363). One end of the retraction spring (363a) is fixedly connected to the bottom of the spring compartment (363), and the other end is fixedly connected to the rotatable scraper (361).

7. The wood shavings spreading equipment according to claim 1, characterized in that: The top of the paving chamber (3) is fixedly connected to a first motor (5), and the rotation output end of the first motor (5) is fixedly connected to a first drive wheel (51). The bottom of the feed inlet (2) is provided with a feeding roller (22). A first rotating disk (21) is fixedly connected to one side of the rotating shaft of the feeding roller (22). The first rotating disk (21) and the first drive wheel (51) are connected by a transmission belt, so that the feeding roller (22) is driven to rotate by the first motor (5).

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