uniformly spreading and weighing metering bin
By using a dispersing rake roller and a leveling rake roller system in particleboard production, the problem of uneven spreading caused by the clumping of wood shavings has been solved, achieving uniform spreading and accurate metering of wood shavings, thus improving particleboard quality and conveying efficiency.
Patent Information
- Application Number
- CN202521844898.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-27
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-27
AI Technical Summary
When wood shavings are stored in the metering bin, they tend to pile up and fall, resulting in uneven distribution of wood shavings on the conveyor belt. This affects the accuracy of metering and the quality of particleboard, and can also easily cause blockages in the metering bin.
The system employs a dispersing rake roller and a leveling rake roller system. The dispersing rake roller breaks up the wood clumps, and the leveling rake roller levels the wood clumps, ensuring that the wood shavings are evenly spread. Combined with a weighing scale, accurate weighing is achieved.
It achieves uniform spreading of wood shavings, improves metering accuracy, avoids clogging of wood shaving piles, and ensures the quality of particleboard and smooth conveying.
Smart Images
Figure CN224677347U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to particleboard production equipment, and more particularly to a uniformly sized metering bin. Background Technology
[0002] In particleboard production, particleboard is made by mixing and bonding wood chips together, then pressing them into shape. For details, please refer to [link / reference needed]. Figure 8 Wood shavings are sprayed onto the conveyor belt of the metering bin. The wood shavings are transported from the metering bin to the mixing equipment by the conveyor belt (or in combination with other conveyor belts). The metering bin weighs the weight A of a unit segment of the conveyor belt in advance. When the wood shavings A of this unit segment arrive at the mixing equipment after time T, the mixing equipment sprays a dose of adhesive according to the corresponding relationship.
[0003] In practice, it was found that occasionally one or more piles of wood shavings would fall from the wood shavings storage bin, causing one or more piles of wood shavings to appear on the conveyor belt along the transport direction. This resulted in uneven distribution of wood shavings on the conveyor belt; these piles were thicker than the baseline, forming convex ridges extending laterally, with the front and rear sections of the pile being thinner than the baseline. Furthermore, these wood shavings could cause blockages at the metering bin outlet and lead to uneven stress on the conveyor belt, resulting in significant deviations in the measured unit segment of wood shavings on the weighing scale. This, in turn, led to inconsistent glue application by the gluing equipment, ultimately affecting the quality of the particleboard. Utility Model Content
[0004] The present invention aims to solve at least one of the technical problems mentioned above, and to provide a uniformly distributed measuring bin that facilitates more even distribution of materials and improves measuring accuracy.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A uniformly distributed weighing bin includes a bin body, a dispersing rake roller system, a leveling rake roller system, and a weighing scale. The bin body has a material discharge port at its top and a conveyor belt that transports materials from back to front. The dispersing rake roller system and the leveling rake roller system are arranged one behind the other, with the dispersing rake roller system higher than the leveling rake roller system. The dispersing rake roller system includes at least two dispersing rake rollers arranged from front to back and progressively higher, while the leveling rake roller system includes at least two leveling rake rollers arranged from back to front and progressively lower. The gap between the dispersing rake roller system and the leveling rake roller system corresponds to the material discharge port's discharge gap. The foremost dispersing rake roller in the dispersing rake roller system is used to rake upwards and dissipate material clumps falling into the discharge gap. The conveyor belt is used to receive the material falling from the dispersing rake roller system and the discharge gap. The weighing scale is used to weigh the section of the conveyor belt that deviates from the discharge point.
[0007] Compared with the prior art, the beneficial effects of this application include: the shavings are broken up and evenly spread on the conveyor belt, improving the accuracy of metering, ensuring the corresponding amount of shavings to be glued, and improving the quality of particleboard; in addition, it avoids the generation of shaving piles on the conveyor belt, avoids shaving piles blocking the metering bin, and ensures smooth conveying.
[0008] As an improvement to the above technical solution, both the dispersing rake roller and the leveling rake roller are provided with at least two rows of nails spaced apart circumferentially, and the rows of nails are arranged with multiple rake nails spaced apart axially along the rake roller.
[0009] As an improvement to the above technical solution, the dispersing rake roller and the leveling rake roller are connected to the same motor via belt drive, and the dispersing rake roller and the leveling rake roller are used to rotate in the same direction.
[0010] As an improvement to the above technical solution, the two dispersing rake rollers, the two leveling rake rollers, and the dispersing rake roller and the leveling rake roller are connected by belt and equal diameter pulley transmission. The two adjacent dispersing rake rollers, the two adjacent leveling rake rollers, and the frontmost dispersing rake roller and the rearmost leveling rake roller are used for staggered rotation.
[0011] As an improvement to the above technical solution, both the dispersing rake roller and the leveling rake roller have cylindrical rake nails, and the top of the rake nail is a hemispherical convex or an arc convex.
[0012] As an improvement to the above technical solution, the dispersing rake roller and the leveling rake roller are made of stainless steel.
[0013] As an improvement to the above technical solution, both the dispersing rake roller and the leveling rake roller include a roller shaft, two mounting discs connecting the roller shaft, and multiple rows of nails mounted by the two mounting discs. The mounting discs are provided with sliding grooves, and the rows of nails are used to adjust their distance from the roller shaft along the sliding grooves.
[0014] As an improvement to the above technical solution, the spike row of the frontmost sweeping and leveling roller is the reference height of the spikes in the middle zone, and the spikes at both ends gradually increase in height in a slightly outward direction.
[0015] As an improvement to the above technical solution, both the dispersing rake roller and the leveling rake roller include a roller shaft, a nail bar, two key bars and two mounting plates. The mounting plate is used to ride on the roller shaft, and the corresponding key bar restricts its rotation relative to the roller shaft. The two ends of the nail bar are respectively screwed to and support the corresponding mounting plate. The key bar is provided with a key shoulder that stops the outer side of the corresponding mounting plate. Attached Figure Description
[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:
[0017] Figure 1This is a side view structural diagram of the calibrated measuring chamber in an embodiment of the present utility model;
[0018] Figure 2 This is a top view structural diagram of the calibrated measuring chamber in an embodiment of the present utility model;
[0019] Figure 3 This is a three-dimensional perspective view of the dispersing rake roller system and the leveling rake roller system according to an embodiment of the present utility model;
[0020] Figure 4 for Figure 3 A partial structural schematic diagram of its sweeping and leveling roller is shown;
[0021] Figure 5 This is a cross-sectional schematic diagram of the dispersing rake roller or the leveling rake roller according to an embodiment of this utility model;
[0022] Figure 6 for Figure 5 An exploded view of the dispersing rake roller or the leveling rake roller is shown;
[0023] Figure 7 These are schematic diagrams illustrating four scenarios of the disintegration and breakup of the aggregate according to embodiments of this utility model.
[0024] Figure 8 A schematic diagram illustrating the scenario of existing technology collapsing.
[0025] The accompanying drawings are only one specific embodiment of this utility model, and the form and structure of this specific embodiment should not limit the extension of other embodiments.
[0026] The silo body is 100mm, the discharge port is 110mm, and the conveyor belt is 120mm.
[0027] Dispersing rake roller 200a, leveling rake roller 200b, material drop gap 200c;
[0028] Roller 210, mounting plate 220, chute 221, nail bar 230, rake nail 231, key bar 240, key shoulder 241;
[0029] The measuring scale is 300. 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] Reference Figures 1 to 3 , Figure 7This utility model provides a uniformly distributed weighing bin, including a bin body 100, a dispersing rake roller system, a leveling rake roller system, and a weighing scale 300. A material discharge port 110 is provided at the top of the bin body 100. A conveyor belt 120 is provided on the bin body 100 for transporting materials from back to front. The dispersing rake roller system and the leveling rake roller system are arranged one after the other, with the dispersing rake roller system higher than the leveling rake roller system. The dispersing rake roller system includes at least two dispersing rake rollers 200a arranged from front to back and progressively higher, while the leveling rake roller system includes at least two leveling rake rollers 200b arranged from back to front and progressively lower. The gap between the leveling rake rollers corresponds to the material drop gap 200c of the material drop port 110. The foremost dispersing rake roller 200a of the dispersing rake roller system is used to rake upwards and knock down material clumps falling into the material drop gap 200c. The conveyor belt 120 is used to receive the material falling from the dispersing rake roller system and the material drop gap 200c. The weighing scale 300 is used to weigh the section of the conveyor belt 120 that deviates from the landing point. Therefore, the weight of this section at each moment is the unit section weight A. This section should not be understood as a fixed section of the conveyor belt 120, but rather the section corresponding to the weighing scale 300 at each moment. (Refer to...) Figure 1 The conveyor belt 120 transports materials from back to front. The plumb bob projection (i.e., the material landing point) of the discharge port 110 is located behind the weighing scale 300. The weighing scale 300 is used to weigh the section of the conveyor belt 120 that is slightly ahead.
[0032] Reference Figure 1 , Figure 7 It is understandable that the dispersing rake roller 200a is used to rake and break up material clumps falling into the material drop gap 200c, so the right edge of the dispersing rake roller 200a rotates upwards. Correspondingly, the dispersing rake roller 200a is... Figure 1 , Figure 7 The rotation is shown to be counterclockwise.
[0033] Wood shavings are flakes and / or strips of wood chips, generally ≤100mm in length, ≤20mm in width, and ≤3mm in thickness. Wood shavings are further divided into coarse and fine wood shavings. Understandably, in the dispersing rake roller 200a and the leveling rake roller 200b, the gaps between the rake nails 231 allow sporadic wood shavings to pass through, while the nail row 230 is used to break up clumps of wood shavings and to sweep away the wood shaving layers.
[0034] Reference Figure 1 , Figures 3 to 7 Furthermore, both the dispersing rake roller 200a and the leveling rake roller 200b have at least two rows of nails 230 spaced apart circumferentially, and the rows of nails 230 have multiple rake nails 231 spaced apart axially along the rake roller.
[0035] Furthermore, the dispersing rake roller 200a and the leveling rake roller 200b are connected to the same motor via belt drive, see reference. Figure 1 , Figure 7The dispersing rake roller 200a and the leveling rake roller 200b are used to rotate in the same direction, as shown in the reference. Figure 7 Both the dispersing rake roller 200a and the leveling rake roller 200b rotate counterclockwise. The motor can be an electric motor, hydraulic motor, or pneumatic motor, preferably an electric motor. By adjusting the speed of the motor and the dispersing rake roller 200a, the rated amount Y1 of the wood shavings pile is adjusted. The amount Y2 of the wood shavings agglomeration distributed backward (to the second material shortage depression) is equal to the amount of wood shavings agglomeration Y0 - Y1. After the speed is set, the wood shavings pile is at the rated amount Y1. The larger the amount of wood shavings agglomeration Y0, the more the dispersing rake roller 200a should replenish backward by an amount Y2.
[0036] The belt can be a regular belt or a toothed belt; a toothed belt is preferred to ensure that the dispersing rake roller 200a and the leveling rake roller 200b rotate smoothly and avoid slippage.
[0037] Furthermore, the two dispersing rake rollers 200a, the two leveling rake rollers 200b, and the dispersing rake rollers 200a and leveling rake rollers 200b are connected by belts and equal-diameter pulleys, as shown in the reference. Figure 1 , Figure 7 The dispersing rake roller 200a and the leveling rake roller 200b rotate at the same speed. They rotate alternately between adjacent dispersing rake rollers 200a, between adjacent leveling rake rollers 200b, and between the foremost dispersing rake roller 200a and the last leveling rake roller 200b. For details, please refer to [reference needed]. Figure 7 The four scenarios of clump breaking up are shown. The rake rollers are in a double-nail row mode. When the nail row 230 of one rake roller is in the vertical plane, the nail row 230 of the other rake roller is in the horizontal plane.
[0038] It is understandable that the dispersing rake roller 200a and the leveling rake roller 200b are used to disperse and level materials, respectively, so the dispersing rake roller 200a and the leveling rake roller 200b rotate at high speed relative to the conveyor belt 120. Specifically, the conveyor belt 120 can have a conveying speed of 0.5-4 cm / s, the diameter of the dispersing rake roller 200a and the leveling rake roller 200b is 40-80 cm, and the linear speed of the dispersing rake roller 200a and the leveling rake roller 200b is 10-30 cm / s. (Refer to...) Figure 7 In the four scenarios, after the wood shavings are broken up, before the current spreading point of the conveyor belt 120 has had time to move them away, most of the scattered wood shavings are spread into a wood shaving pile at that point. The volume of this wood shaving pile is equivalent to the sum of the volume of this point and the material shortage depression in front of it, which is not the large wood shaving pile of the prior art. In addition, before the current spreading point of the conveyor belt 120 has had time to move them away, another part of the scattered wood shavings is swept behind the wood shaving pile by the breaking rake roller 200a, so that a more ideal layer thickness is obtained behind the wood shaving pile. (Refer to...) Figure 7In the four scenarios described above, the wood shavings pile of this invention are passed under the sweeping and leveling roller system and are swept and flattened, resulting in a relatively ideal layer thickness for both the wood shavings pile and the area in front of it.
[0039] Reference Figures 1 to 7 Furthermore, both the breaking rake roller 200a and the leveling rake roller 200b have cylindrical rake nails 231, and the top of the rake nails 231 is a hemispherical convex or arc convex, so that very little wood shavings are broken.
[0040] Furthermore, the dispersing rake roller 200a and the leveling rake roller 200b can be made entirely of stainless steel, making them relatively lightweight and rigid.
[0041] In some embodiments, the rake nail 231 is made of plastic, silicone, etc., or the rake nail 231 is provided with a plastic jacket or a silicone jacket, etc.
[0042] In practice, the transfer time T from the metering chamber to the dispensing equipment can be determined by averaging the actual transfer times of multiple test samples. The metering scale 300 in the metering chamber pre-weighs the weight A of a unit segment of the conveyor belt 120. When this unit segment of wood shavings A arrives at the dispensing equipment after time T, the dispensing equipment sprays a dosage of adhesive according to the corresponding relationship. It can be understood that the conveyor belt transfers at time 120, and the metering scale 300 weighs at time 300. The weight of this unit segment corresponds to a point on the weight curve measured by the metering scale 300. Correspondingly, the dispensing amount a is a matching point on the dispensing curve; that is, the dispensing equipment applies adhesive according to this dispensing curve.
[0043] The operation process of this utility model can be as follows:
[0044] Reference Figure 7 Normal spreading: Non-agglomerated wood chips are continuously and evenly spread from the wood chip storage bin. The resulting wood chip flow passes through the material drop gap 200c and spreads on the conveyor belt 120, which extends to the reference thickness.
[0045] Reference Figure 7Before the wood shavings agglomerate falls, there is a brief period of no material flow in the storage bin, creating a first material shortage depression on the wood shavings spreading belt of conveyor belt 120. The dispersing rake roller 200a rotates at a relatively high speed. When the agglomerate falls to or enters the material drop gap 200c, it is struck by the dispersing rake roller 200a. Most of the wood shavings scattered from the agglomerate will pass through the material drop gap 200c and form a wood shaving pile on the conveyor belt 120. The wood shavings pile is actually a ridge-shaped structure spanning the conveyor belt 120. The first material shortage recess is located in front of the wood shavings pile. In addition, other wood shavings scattered by the wood shavings agglomeration are transferred to the back of the wood shavings pile by the dispersing rake roller 200a, so that the back of the wood shavings pile is covered with a reference thickness. On the other hand, when the wood shavings pile passes through the leveling rake roller system, it is scraped and spread by the leveling rake roller 200b, so that the top of the wood shavings pile fills the first material shortage recess, so that the wood shavings section and the first material shortage recess change to the reference thickness.
[0046] Reference Figure 7 It is understandable that the wood shavings agglomerate was originally intended to be used to pave the section where the wood shavings pile was located, as well as the areas before and after that section. Therefore, before and after the wood shavings agglomerate fell, the storage bin seemed to have a brief period of no material falling.
[0047] Compared with the prior art, the beneficial effects of this application include: the broken-up wood chips are dispersed and evenly spread on the conveyor belt 120, improving the accuracy of metering, ensuring the corresponding amount of wood chips to be glued, and improving the quality of particleboard; in addition, it avoids the generation of wood chip piles on the conveyor belt 120, avoids the blockage of the metering bin by wood chip piles, and ensures smooth conveying.
[0048] It is understood that in some embodiments, the metering bin directly conveys wood shavings to the sizing equipment via the conveyor belt 120; alternatively, the conveyor belt 120 may be combined with one or more conveyor belts to transport the wood shavings to the sizing equipment.
[0049] Refer to 3 to Figure 6 In some embodiments of this utility model, both the dispersing rake roller 200a and the leveling rake roller 200b include a roller shaft 210, two mounting discs 220 connecting the roller shaft 210, and a plurality of nail rows 230 jointly mounted by the two mounting discs 220. The mounting discs 220 have grooves 221, and the nail rows 230 are used to adjust their distance from the roller shaft 210 along the grooves 221, thereby increasing or decreasing the actual roller diameter of the dispersing rake roller 200a and the leveling rake roller 200b. (Refer to...) Figure 1 , Figure 7 The diameter of the foremost sweeping rake roller 200b is adjusted, as is the scraping depth of the sweeping rake roller 200b. The operation of this invention involves adjusting the relative difference between the falling speed of the wood shavings and the speed of the conveyor belt 120 to obtain the corresponding spreading thickness. Further adjustments to the diameter of the foremost sweeping rake roller 200b are needed to ensure this spreading thickness.
[0050] Refer to 3 to Figure 6In some embodiments of this utility model, the nail row 230 of the foremost sweeping and leveling roller 200b is the reference height of the central rake nail 231, and the rake nails 231 at both ends gradually increase in height in a slightly outward direction. When the sweeping and leveling roller 200b scrapes the wood shavings on the conveyor belt 120, it is also used to correct the thickness of the wood shavings on both sides of the spreading belt, so that the cutting areas on both sides of the particleboard to be pressed and formed later have less material, thus saving material.
[0051] In practice, the silo body 100 is a closed box, and the dispersing rake roller 200a and the leveling rake roller 200b are large, rough parts. To address the issue of ease of disassembly and assembly of the dispersing rake roller 200a and the leveling rake roller 200b, refer to 3 to... Figure 6 In some embodiments of this utility model, both the dispersing rake roller 200a and the leveling rake roller 200b include a roller shaft 210, a nail bar 230, two key bars 240, and two mounting discs 220. The mounting discs 220, after mounting the roller shaft 210, are restricted from rotating relative to the roller shaft 210 by the corresponding key bars 240. The nail bar 230 is screwed to both ends and supports the corresponding mounting disc 220. The key bars 240 are provided with a stop for the outer side of the corresponding mounting disc 220. In this utility model, the roller shaft 210 does not need to have a shoulder to limit the movement of the mounting disc 220. After the roller shaft 210 enters the hopper 100 and the mounting disc 220 is fitted onto the roller shaft 210, its rotation and movement can be limited by the specially designed key bars 240. In this utility model, the mounting disc 220 supports the nail bar 230, which in turn limits the movement of the mounting disc 220. Therefore, after the installation of the new metering bin and the wear of the rake nail 231, the dispersing rake roller 200a and the leveling rake roller 200b can be easily disassembled and assembled.
[0052] The specific installation process may include:
[0053] Prepare to place the installation tray 220 and nail bar 230 into the compartment 100;
[0054] The roller 210 passes through the first bearing housing, two mounting discs 220, and the second bearing housing. The two mounting discs 220 are pre-fitted into the middle area of the roller 210. The first and second bearing housings are connected to the housing 100 by screws, thus completing the installation of the roller 210.
[0055] In the roller assembly, the key bar 240 is embedded in the countersunk hole of the roller shaft 210, the two mounting discs 220 are separated and respectively straddle the corresponding key bar 240. The key bar 240 limits the rotation of the mounting disc 220 relative to the roller shaft 210. The key shoulder 241 of the key bar 240 stops the two mounting discs 220 from moving outward. The pin row 230 is inserted between the two mounting discs 220. The two ends of the pin row 230 support the corresponding mounting disc 220 respectively. That is, the two ends of the pin row 230 are respectively engaged with the corresponding key shoulder 241 to clamp the mounting disc 220 together.
[0056] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the scope of the technical solution of this utility model.
Claims
1. A uniformly sized measuring bin, characterized in that, include: The bin (100) with a material discharge port (110) at the top is equipped with a conveyor belt (120) for transporting materials from back to front; The dispersing rake roller system and the leveling rake roller system are arranged one after the other, with the dispersing rake roller system being higher than the leveling rake roller system. The dispersing rake roller system includes at least two dispersing rake rollers (200a) arranged from front to back and gradually increasing in height, and the leveling rake roller system includes at least two leveling rake rollers (200b) arranged from back to front and gradually decreasing in height. The gap between the dispersing rake roller system and the leveling rake roller system is the material drop gap (200c) corresponding to the material drop port (110). The foremost dispersing rake roller (200a) of the dispersing rake roller system is used to rake upwards and knock down the material clumps falling into the material drop gap (200c). The conveyor belt (120) is used to receive the material falling from the dispersing rake roller system and the material drop gap (200c). A weighing scale (300) is used to weigh the section of the conveyor belt (120) that deviates from the landing point.
2. The uniform distribution measuring chamber according to claim 1, characterized in that, Both the dispersing rake roller (200a) and the leveling rake roller (200b) have at least two rows of nails (230) spaced apart circumferentially, and the rows of nails (230) have multiple rake nails (231) spaced apart axially along the rake roller.
3. The uniform distribution measuring chamber according to claim 1, characterized in that, The dispersing rake roller (200a) and the leveling rake roller (200b) are connected to the same motor via belt drive, and the dispersing rake roller (200a) and the leveling rake roller (200b) are used to rotate in the same direction.
4. The uniform distribution measuring chamber according to claim 3, characterized in that, The two dispersing rake rollers (200a), the two leveling rake rollers (200b), and the dispersing rake rollers (200a) and leveling rake rollers (200b) are connected by belts and equal-diameter pulleys. The two adjacent dispersing rake rollers (200a), the two adjacent leveling rake rollers (200b), and the foremost dispersing rake roller (200a) and the last leveling rake roller (200b) are used for staggered rotation.
5. The uniform distribution measuring chamber according to any one of claims 1 to 4, characterized in that, Both the dispersing rake roller (200a) and the leveling rake roller (200b) have cylindrical rake nails (231), and the top of the rake nails (231) is a hemispherical convex or an arc convex.
6. The uniform distribution measuring chamber according to any one of claims 1 to 4, characterized in that, The dispersing rake roller (200a) and the leveling rake roller (200b) are made of stainless steel.
7. The uniform distribution measuring chamber according to any one of claims 1 to 4, characterized in that, Both the dispersing rake roller (200a) and the leveling rake roller (200b) include a roller shaft (210), two mounting discs (220) connecting the roller shaft (210), and multiple nail rows (230) jointly mounted by the two mounting discs (220). The mounting discs (220) are provided with grooves (221), and the nail rows (230) are used to adjust their distance from the roller shaft (210) along the grooves (221).
8. The uniform distribution measuring chamber according to any one of claims 1 to 4, characterized in that, The row of nails (230) of the frontmost sweeping rake roller (200b) is the reference height of the middle zone rake nails (231), and the rake nails (231) at both ends gradually increase in height in the outward direction.
9. The uniform distribution measuring chamber according to any one of claims 1 to 4, characterized in that, Both the dispersing rake roller (200a) and the leveling rake roller (200b) include a roller shaft (210), a nail bar (230), two key bars (240), and two mounting discs (220). The mounting disc (220) is used to mount the roller shaft (210), and its rotation relative to the roller shaft (210) is restricted by the corresponding key bar (240). The two ends of the nail bar (230) are respectively screwed to and support the corresponding mounting disc (220). The key bar (240) is provided with a key shoulder (241) that stops the outer side of the corresponding mounting disc (220).