A friction dewaterer for sheet material
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DEZHOU QUNFENG MACHINERY MFG
- Filing Date
- 2026-04-02
- Publication Date
- 2026-06-02
Smart Images
Figure CN121953620B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of dewatering equipment, and more particularly to a friction dewatering machine for dewatering sheets. Background Technology
[0002] In waste sorting and recycling, plastic products are mostly processed through crushing, washing, and separation. Before forming the raw plastic sheets for recycling, the separated plastic sheets need to be washed to remove dirt. After washing, the plastic sheets need to be dehydrated. Currently, dehydration of plastic sheets is mostly achieved through horizontal dehydrators with stirring and separation. In this process, the plastic sheets are agitated by horizontal shaft paddles inside a horizontally arranged screen cylinder to promote separation between the sheets. The water is separated and leaked out by the weight of the water and the centrifugal force generated by the agitation of the plastic sheets. The screen cylinder has feed and discharge at both ends to achieve continuous drying.
[0003] During the research and development process, the researchers discovered that when the distance between the blade edge and the screen cylinder is close (less than the thickness of two layers of sheet material stacked together, generally within 2mm), sheet material (up to three layers of sheet material stacked together) is easily squeezed between the blade and the screen cylinder. The sheet material between the blade and the screen cylinder is easily compressed and fixed, resulting in greater rotational resistance of the blade and making the blade and screen cylinder prone to compression and friction damage. When the distance between the blade edge and the screen cylinder is greater than 2mm, plastic sheet material is easily adhered to the surface of the screen cylinder, and there are more layers of plastic sheet material squeezed between the blade and the screen cylinder. When the blade rotates, it is easier to drive the sheet material close to the blade to move due to friction. The frictional force transmitted to the sheet material attached to the surface of the screen cylinder is smaller, making the sheet material attached to the surface of the screen cylinder not only difficult to move, but also easy to be squeezed and further adhered to the screen cylinder, thus affecting the water leakage efficiency of the screen cylinder. Summary of the Invention
[0004] To address the aforementioned technical problems, this invention provides a friction dewatering machine for sheet dewatering. By optimizing the structure of the filter cylinder and blades, the problems existing in the prior art are effectively solved.
[0005] To address the aforementioned technical problems, this invention provides a friction dewatering machine for sheet dewatering, comprising: a housing assembly, the housing assembly including an outer shell and a filter cylinder laterally disposed inside the outer shell, the outer shell having an inlet communicating with the inner side of the filter cylinder at one end and an outlet communicating with the inner side of the filter cylinder at the other end, and a drain outlet at the bottom of the outer shell; and a stirring roller assembly including a shaft disposed inside the filter cylinder and blades disposed on the shaft, the blades being inclined relative to the axis of the shaft; wherein, the filter cylinder has lower arc segments formed on both sides at the bottom center position, the distance between the filter cylinder and the edge of the blade at the lower arc segment is less than 2mm, and the distance between the filter cylinder and the blade at other locations outside the lower arc segment is greater than or equal to 3mm.
[0006] Furthermore, the filter cartridge is rotatably disposed on the outer casing, and a reset structure is provided between the filter cartridge and the outer casing. After the filter cartridge is driven to rotate by the blade from the set position, the reset structure provides a force to the filter cartridge to rotate toward the set position.
[0007] Furthermore, the reset structure includes a spring disposed between the filter cartridge and the outer casing.
[0008] Furthermore, the reset structure also includes:
[0009] An inner feed hopper is installed at the corresponding feed inlet position of the filter cylinder, and the inner feed hopper extends into the feed inlet;
[0010] An inner discharge hopper is installed at the corresponding discharge port position of the filter cylinder, and the inner discharge hopper extends into the discharge port;
[0011] The inner feed hopper and / or the inner discharge hopper are provided with the spring on one side of the blade rotation direction, and the two ends of the spring abut against the wall between the inner feed hopper and the feed port or between the wall between the inner discharge hopper and the discharge port.
[0012] Furthermore, the inner feed hopper and / or the inner discharge hopper are provided with a shock-absorbing block on the side away from the rotation direction of the blade, and the shock-absorbing block abuts against the inlet wall of the feed port or the outlet wall at the corresponding position.
[0013] Furthermore, the outer casing is provided with an outer feed hopper at the feed inlet and an outer discharge hopper at the discharge outlet;
[0014] The outer feed hopper is located on the top of the outer shell, and a deformable feed cylinder is provided between the inner feed hopper and the outer feed hopper;
[0015] The bottom wall of the outgoing hopper is inclined downwards in a direction away from the filter cylinder. When the filter cylinder is in a set position, the bottom wall of the inner outgoing hopper is inclined downwards in a direction away from the filter cylinder.
[0016] Furthermore, the filter cylinder has an arc-shaped material-containing section on the exit side of the lower arc segment, and the filter cylinder has an upper arc segment on the entry side of the lower arc segment that communicates with the material-containing section.
[0017] The distance between the filter cylinder and the edge of the blade at the material-containing section is greater than the distance between the filter cylinder and the edge of the blade at the upper arc section.
[0018] Furthermore, the central angle between the two sides of the lower arc segment and the central axis of the filter cylinder is α, 60°≤α≤120°; the edge of the material-containing section away from the lower arc segment is located above the horizontal plane where the rotation center of the filter cylinder is located, and the central angle between the upper edge of the material-containing section and the horizontal plane where the rotation center of the filter cylinder is located and the center of the filter cylinder is β, 0°≤β≤30°.
[0019] Furthermore, the blade includes a connecting rod connected to the shaft and a blade body connected to the connecting rod, the width of the blade body being greater than the width of the connecting rod; side baffles are provided on both sides of the blade body.
[0020] Furthermore, the blade body includes a throwing section connected to the connecting rod, a pushing section connected to the outside of the throwing section, and a scraping section disposed outside the pushing section; the material-facing surface of the pushing section extends away from the direction of blade rotation in a direction away from the scraping section, and the material-facing surface of the throwing section extends away from the direction of blade rotation in a direction away from the pushing section.
[0021] The beneficial effect of this invention is that by optimizing the structure of the filter cartridge and blades, the problems existing in the prior art are effectively solved. Attached Figure Description
[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings...
[0023] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention.
[0024] Figure 2 for Figure 1 The illustrated embodiment is shown as a side cross-sectional view of the structure at the center of the shaft.
[0025] Figure 3 for Figure 1 The diagram shows the structure of the stirring roller assembly in the embodiment shown.
[0026] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point D.
[0027] Figure 5 for Figure 1 The diagram shows the structure of the filter cartridge in the embodiment shown.
[0028] Figure 6 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.
[0029] Figure 7 for Figure 2Schematic diagram of the cross-sectional structure along the BB direction.
[0030] Figure 8 for Figure 2 A schematic diagram of the cross-sectional structure along the CC direction.
[0031] The components are as follows: 1. Outer shell; 2. Filter cylinder; 201. Lower arc section; 202. Material holding section; 203. Upper arc section; 3. Drain outlet; 4. Blade; 401. Connecting rod; 402. Blade body; 4021. Throwing section; 4022. Pushing section; 4023. Scraping section; 403. Side baffle; 5. Spring; 6. Inner feed hopper; 7. Inner discharge hopper; 8. Shock absorber; 9. Outer feed hopper; 10. Outer discharge hopper; 11. Shaft; 12. Feeding deflector; 13. Throwing deflector; 14. Feed cylinder. Detailed Implementation
[0032] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.
[0033] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.
[0034] Furthermore, in the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two connected entities do not establish a connection relationship through an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.
[0036] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0037] In this invention, such as Figure 1-8 As shown, a friction dewatering machine for sheet dewatering is provided, comprising a housing assembly including an outer shell 1 and a filter cylinder 2 horizontally disposed inside the outer shell 1. The outer shell 1 has a feed inlet communicating with the inner side of the filter cylinder 2 at one end and a discharge outlet communicating with the inner side of the filter cylinder 2 at the other end. A drain outlet 3 is provided at the bottom of the outer shell 1. A stirring roller assembly includes a shaft 11 disposed inside the filter cylinder 2 and blades 4 disposed on the shaft 11. The blades 4 are inclined relative to the axis of the shaft 11. The filter cylinder 2 has lower arc segments 201 formed on both sides at the bottom center position. The distance between the filter cylinder 2 at the lower arc segment 201 and the edge of the blade 4 is less than 2 mm, and the distance between the filter cylinder 2 outside the lower arc segment 201 and the blade 4 is greater than or equal to 3 mm.
[0038] This invention addresses the practical scenario of dehydrating washed plastic sheets. The washed plastic sheets primarily contain surface-bound water, and adjacent sheets tend to adhere and stack. After entering the filter cylinder 2 through the inlet, the sheets naturally accumulate under gravity in the lower arc section 201 area at the bottom of the filter cylinder 2. This is the core station for water removal from the sheets. The shaft 11 of the stirring roller assembly drives the inclined blades 4 to rotate at a uniform speed, agitating and breaking up the accumulated plastic sheets, and ejecting some of them.
[0039] This invention addresses the small-pitch design of the lower arc segment 201: the distance between the edge of the blade 4 and the inner wall of the lower arc segment 201 is less than 2mm. When the blade 4 rotates to the position of the lower arc segment 201, the space between the blade 4 and the inner wall of the lower arc segment 201 for the sheet material to be squeezed in is small, resulting in fewer layers of sheet material being squeezed in between the blade 4 and the inner wall of the lower arc segment 201. The squeezed blade 4 can be moved directly or indirectly by friction, thereby enabling the blade 4 to thoroughly scrape and disperse the sheet material accumulated in the lower arc segment 201 when it rotates, preventing the sheet material from adhering to the screen holes, ensuring that water can quickly seep out by its own weight, and at the same time promoting the downward discharge of water that is stuck between the sheets.
[0040] When the blades of this invention rotate to the non-lower arc segment 201 position, they have a larger spacing: the amount of sheet material piled up in this area is small, and the large spacing design avoids excessive friction between the blades 4 and the inner wall of the filter cylinder 2, reducing the rotational resistance of the blades 4 and improving the service life of the blades 4 and the filter cylinder 2. The large spacing of ≥3mm in this area provides ample circumferential movement space for the sheet material. When the blades 4 rotate, the inclined blade surface will cause the sheet material to detach from the cylinder wall and be thrown and turned outwards, breaking the state where the sheet material is adhered to the screen holes due to surface water film adsorption. This allows the free water and attached water on the sheet material surface to quickly fall off under the combined action of centrifugal force and gravity. At the same time, the large spacing reduces the squeezing effect of the blades 4 on the sheet material, preventing the sheet material from being compacted and clogging the holes, making it easier for the sheet material to separate from the filter cylinder 2 and preventing the filter holes of the filter cylinder 2 from being blocked. Compared with the traditional uniform small spacing design, the large spacing in the non-lower arc segment 201 makes it less likely for the sheet material to adhere tightly to the cylinder wall, making it easier for the sheet material to be dynamically dispersed and fully turned over, resulting in more thorough water removal, less screen clogging, and maximizing the utilization of the dehydration area.
[0041] The design of the inclined blades 4, while stirring in the circumferential direction, pushes the sheet along the axial direction of the filter cylinder 2 from the feed port to the discharge port, realizing continuous dewatering operation. The dewatered wastewater falls through the mesh of the filter cylinder 2 into the bottom of the outer shell 1 and is discharged through the drain port 3. The dewatered plastic sheet is output from the discharge port.
[0042] It is evident that the present invention improves the pushing and dispersing effect of the blades 4 on the sheet material in the lower arc section 201 area where the material is easily compressed and piled up, and promotes the drainage efficiency at the bottom of the filter cylinder 2. In the area outside the lower arc section 201, the rotational resistance of the blades 4 is reduced, thereby improving the service life of the blades 4 and the filter cylinder 2.
[0043] exist Figure 1 In the illustrated embodiment, to further specify the structure of the present invention, the filter cylinder 2 is rotatably disposed on the outer shell 1, and a reset structure is provided between the filter cylinder 2 and the outer shell 1. After the filter cylinder is driven to rotate by the blade 4 from a set position, the reset structure provides a force to the filter cylinder 2 to rotate toward the set position.
[0044] In this embodiment, during the dehydration process, when the blade 4 rotates and moves the plastic sheet, the blade 4 at the lower arc section 201 is more likely to squeeze in more layers of sheet material (e.g., because the distance between the blade 4 and the filter cylinder 2 wall at the lower arc section 201 is 1.5mm, the sheet material is squeezed more compactly when more than two layers of 0.6mm sheet material are squeezed in). This results in a greater extrusion force and friction force being transmitted to the filter cylinder 2. The friction force between the blade 4 and the sheet material, and between the sheet material and the inner wall of the lower arc section 201 of the filter cylinder 2, increases sharply. The driving force generated by the rotation of the blade 4 is transmitted to the filter cylinder 2 through the tightly squeezed sheet material, thereby causing the filter cylinder 2 to deflect slightly in the same direction as the blade 4.
[0045] After the filter cylinder 2 deflects slightly, the lower arc segment 201, which was originally at the bottom, will deviate from the optimal position for gravity dewatering. As the blade 4 continues to rotate, the sheet material squeezed between the blade 4 and the filter cylinder 2 shifts and displaces. Consequently, the squeezing force and friction between the blade 4 and the filter cylinder 2 fluctuate and decrease until they are insufficient to drive the filter cylinder 2 to rotate. At this point, the reset structure immediately generates a reset force opposite to the deflection direction, driving the filter cylinder 2 to rotate towards the initial set position, maintaining a stable gravity dewatering condition.
[0046] This embodiment, through the design of a rotatable filter cylinder 2 combined with a reset structure, allows the filter cylinder 2 to deflect slightly to release the compressive and frictional forces. This avoids wear, deformation, or even jamming of the blades 4 and filter cylinder 2 due to rigid compression, and also reduces the impact on the rotation of the shaft 11. On the other hand, the reset structure ensures that the lower arc segment 201 is always at the bottom gravity dehydration position. Moreover, during the process of the filter cylinder 2 being driven to rotate and reset, it can also promote the loosening and separation of the sheet material in contact with the filter cylinder 2 from the filter cylinder 2.
[0047] Therefore, this embodiment can protect equipment components and ensure continuous dehydration efficiency and quality, achieving a dual improvement in equipment operation stability and dehydration effect.
[0048] exist Figure 1 In the illustrated embodiment, the filter cartridge 2 is configured as follows: Figure 5 As shown, the filter cylinder 2 is configured as a cylindrical structure without filter holes at both the inner feed hopper 6 and the inner discharge hopper 7. The middle section of the filter cylinder 2 is provided with a hollowed-out cylinder frame, on which filter screens are fixed.
[0049] exist Figure 1In the illustrated embodiment, the shaft 11 is equipped with a feeding paddle 12 at the inner feed hopper 6 and a throwing paddle 13 at the discharge hopper. The structures of the feeding paddle 12 and the throwing paddle 13 differ from those of the blade 4. The feeding paddle 12 is a sheet-like structure inclined across the axis of the filter cylinder 2, which rapidly pushes the sheet towards the inner discharge hopper 7 when it rotates. The throwing paddle 13 is a plate-like structure parallel to the radial line of the filter cylinder 2, so that the throwing paddle 13 can rotate the sheet and discharge it from the inner discharge hopper 7 through centrifugal force. In an optional embodiment, the structures of the feeding paddle 12 and the throwing paddle 13 can also be configured to be the same as those of the blade 4.
[0050] In a preferred embodiment, more specifically regarding the structure of the present invention, the reset structure includes a spring 5 disposed between the filter cylinder 2 and the outer casing 1.
[0051] When the filter cylinder 2 is deflected by the blades 4, the spring 5 is compressed or twisted, generating elastic deformation and storing elastic potential energy. When the rotational force of the blades 4 on the filter cylinder 2 decreases or disappears, the spring 5 releases the elastic potential energy, generating a reverse elastic force that pulls the filter cylinder 2 back to its initial set position quickly. The elastic force of the spring 5 is adapted to the deflection amplitude of the filter cylinder 2, ensuring rapid return while avoiding rigid impact. Using the spring 5 as the reset component results in a simple structure, low cost, and high reliability. It eliminates the need for complex drive devices such as electrical control and hydraulics, making it suitable for harsh water washing and dehydration conditions (humid and dusty). It is not easily damaged and is easy to replace, further reducing equipment manufacturing and maintenance costs. The reset response speed is fast, ensuring spacing stability.
[0052] exist Figure 1 In the illustrated embodiment, a helical spring 5 is used as the power component of the reset structure. This is not intended to limit the invention. In alternative embodiments, a torsion spring 5 may also be used as the power component of the reset structure.
[0053] exist Figure 1 In the illustrated embodiment, to further specify the structure of the present invention, the reset structure further includes: an inner feed hopper 6, which is installed at the corresponding feed inlet position of the filter cylinder 2 and extends into the feed inlet; an inner discharge hopper 7, which is installed at the corresponding discharge outlet position of the filter cylinder and extends into the discharge outlet; the inner feed hopper 6 and / or the inner discharge hopper 7 are provided with the spring 5 on one side of the rotation direction of the blade 4, and the two ends of the spring 5 abut against the wall between the inner feed hopper 6 and the feed inlet or between the inner discharge hopper 7 and the discharge outlet.
[0054] like Figure 5 , Figure 6 and Figure 8As shown, the inner feed hopper 6 and the inner discharge hopper 7 are extension components of the filter cylinder 2. They deflect synchronously with the filter cylinder 2. When the blade 4 rotates and drives the filter cylinder 2 to deflect, the inner feed hopper 6 and the inner discharge hopper 7 squeeze the spring 5 on the corresponding side, and the spring 5 stores force. After the deflection stops, the elastic force of the spring 5 acts on the lower filter cylinder 2 to reset and rotate.
[0055] exist Figure 1 In the embodiment shown, springs 5 are respectively provided in the inner feed hopper 6 and the inner discharge hopper 7. The two ends of the inner feed hopper 6 and the inner discharge hopper 7 are subjected to uniform force, which pushes the filter cylinder 2 back to its position smoothly, avoiding jamming or tilting of the filter cylinder 2 caused by unilateral reset. In an optional embodiment, springs 5 can also be provided only in the inner feed hopper 6 or the outer feed hopper 9.
[0056] exist Figure 1 In the illustrated embodiment, to further specify the structure of the present invention, the inner feed hopper 6 and / or the inner discharge hopper 7 are provided with a shock-absorbing block 8 on the side away from the rotation direction of the blade 4, and the shock-absorbing block 8 abuts against the inlet wall of the feed port or the outlet wall at the corresponding position.
[0057] like Figure 5 and Figure 6 As shown, when the spring 5 pushes the filter cylinder 2 back to its original position, the shock absorber 8 acts as a buffer and limiter to prevent the filter cylinder 2 from returning too quickly and causing a rigid collision with the outer wall of the outer shell 1, thereby reducing noise and equipment impact. At the same time, when the shock absorber 8 is made of rubber, when the rubber shock absorber 8 is squeezed and stores energy and rebounds, it can increase the micro-movement of the filter cylinder 2, thereby further promoting the separation of the sheet attached to the filter cylinder 2.
[0058] exist Figure 1 In the illustrated embodiment, to further specify the structure of the present invention, the outer shell 1 is provided with an outer feed hopper 9 at the feed inlet and an outer feed hopper 10 at the discharge outlet; the outer feed hopper 9 is disposed on the top of the outer shell 1, and a deformable feed cylinder 14 is provided between the inner feed hopper 6 and the outer feed hopper 9; the bottom wall of the outer feed hopper 10 is inclined downwards in a direction away from the filter cylinder 2, and when the filter cylinder 2 is in a set position, the bottom wall of the inner feed hopper 7 is inclined downwards in a direction away from the filter cylinder 2.
[0059] In this embodiment, as Figure 6 , Figure 7 and Figure 8 As shown, the deformable feed cylinder 14 is adapted to the slight rotation of the filter cylinder 2, which ensures that the feed channel is unobstructed and does not affect the reset of the filter cylinder 2, preventing the material from getting stuck in the feed gap during the feeding process; the inclined inner discharge hopper 7 and the outer discharge hopper 10 work together to use gravity to realize the automatic sliding discharge of the dehydrated plastic sheet, avoiding the accumulation of material at the discharge port and ensuring continuous discharge efficiency.
[0060] In an alternative embodiment, the inner feed hopper 6 can be directly led out to the outside of the outer feed hopper 9, and the sheet to be dehydrated can be directly fed into the filter cylinder 2 from the inner feed hopper 6; the inner discharge hopper 7 can be directly led out to the outside of the outer discharge hopper 10, and the dehydrated sheet can be directly discharged from the outer discharge hopper 10.
[0061] Among them, such as Figure 8 As shown, the feed cylinder 14 is preferably a rubber feed cylinder, and the upper and lower ends of the feed cylinder 14 are respectively connected to the outer feed hopper 9 and the inner feed hopper 6.
[0062] exist Figure 1 In the illustrated embodiment, specifically regarding the structure of the present invention, the filter cylinder 2 has an arc-shaped material-containing section 202 formed on the exit side of the lower arc segment 201, and the filter cylinder 2 has an upper arc segment 203 communicating with the material-containing section 202 on the entry side of the lower arc segment 201; the distance between the filter cylinder 2 at the material-containing section 202 and the edge of the blade 4 is greater than the distance between the filter cylinder 2 at the upper arc segment 203 and the edge of the blade 4. In a specific embodiment, the distance between the edge of the blade 4 and the upper arc segment 203 is more than 1 mm greater than the distance between the edge of the blade 4 and the lower arc segment 201, and the distance between the edge of the blade 4 and the material-containing section 202 is more than 2 mm greater than the distance between the edge of the blade 4 and the upper arc segment 203.
[0063] When the blade 4 in this embodiment rotates, as Figure 7 As shown, the blade 4 rotates cyclically along the inner wall of the filter cylinder 2 in the trajectory of lower arc segment 201 → material holding section 202 → upper arc segment 203. The blade 4 first rotates to the bottom lower arc segment 201. The blade 4 scrapes and squeezes the accumulated sheet material through a small gap. At this time, the blade 4 can push the sheet material near the bottom wall of the lower arc segment 201 to move fully, so as to promote the uniformity of sheet dewatering and maintain the efficiency of gravity dewatering at the lower arc segment 201. During the rotation of the blade 4 in this area, it is easy to cause the filter cylinder 2 to deflect slightly.
[0064] When blade 4 enters the material holding section 202, the distance between blade 4 and the inner wall of filter cylinder 2 increases rapidly. On the one hand, this significantly reduces the frictional force transmitted from blade 4 to filter cylinder 2 through the dense sheet, reducing the forced rotational force on filter cylinder 2. This allows the reset structure to overcome resistance and quickly drive filter cylinder 2 to rotate back and reset, ensuring that the lower arc section 201 falls back to the bottom gravity dehydration position in time. On the other hand, the large spacing of the material holding section 202 provides ample space for the sheet to move. The multi-layer sheet pushed by the edge of blade 4 is no longer rigidly squeezed in this area, but is in a loose, multi-layer frictional misalignment state. The sheet that was originally tightly squeezed and bound by the water film is separated layer by layer. The free water trapped between the sheets is more likely to lose its restraint and seep downwards quickly under the action of gravity, completing deep gravity dehydration.
[0065] After exiting the material-containing section 202, blade 4 continues to rotate to the upper arc section 203. The distance between the upper arc section 203 and blade 4 is smaller than that between the material-containing section 202. This allows the sheet material, when oscillating under the centrifugal force, to quickly contact the upper arc section 203 after separating from blade 4. This makes it easier for the free water attached to the sheet material to separate due to centrifugal force. It also allows for gentle agitation of the separated single / double-layer sheet material, preventing the sheet material from re-adhering to the wall. When sheet material adheres to the upper arc section 203, the airflow generated by the rotation of the blade 4's edge promotes the separation and detachment of the adhered blade 4. At the same time, the distance between the upper arc section 203 and blade 4 is greater than that between the lower arc section 201, which also reduces the resistance generated by the blade 4 squeezing and rubbing the sheet material during the process in the upper arc section 203.
[0066] This embodiment achieves dual efficiency enhancement through a gradient arc design, namely, accelerated resetting and deep dehydration: Firstly, the material-containing section 202 rapidly increases the distance between the blades 4 and the cylinder wall, relieving the friction force on the filter cylinder 2, allowing the resetting structure to respond faster and the filter cylinder 2 to reset more promptly, thus completely solving the problem of unbalanced dehydration conditions caused by deflection lag; Secondly, by utilizing the staggered separation of multiple layers of sheets, the phenomenon of sheet adhesion and clumping is broken, releasing the water trapped between the sheets, significantly improving gravity dehydration efficiency, and making the sheet dehydration more thorough; at the same time, the three arc surfaces smoothly transition, eliminating dead corners for material accumulation, further avoiding material jamming and clogging, adapting to the continuous dehydration needs of high moisture content plastic sheets, and enhancing the overall dehydration stability and processing efficiency of the machine.
[0067] exist Figure 1 In the illustrated embodiments, as Figure 7 As shown, the filter cylinder 2, based on its initial set position, has its inner wall sequentially divided into a lower arc segment 201, a material-containing section 202, and an upper arc segment 203. The center of the lower arc segment 201 is directly below the center of the filter cylinder 2, and the central angle α between the two edges of the lower arc segment 201 and the central axis of the filter cylinder 2 satisfies 60°≤α≤120°. Figure 1 In the illustrated embodiment, α=70° is preferred; the material-containing section 202 is arranged adjacent to the lower arc section 201 on the rotating side of the blade 4, and the material-containing section 202 is far from the edge of the lower arc section 201. The central angle β formed between the material-containing section 202 and the horizontal plane where the rotation center of the filter cylinder 2 is located and the center of the filter cylinder 2 satisfies 0°≤β≤30°. In the illustrated embodiment, β=20° is preferred.
[0068] Preferably, when the rotational speed of the shaft 11 is in the range of 800 to 1200 RPM, this speed range will not result in insufficient agitation of the sheet material due to excessively low speed, or insufficient centrifugal force generated by scattering the sheet material, nor will it result in excessive rotational resistance of the shaft 11 due to excessively high speed, or excessive impact force on the filter cylinder 2 caused by the frictional force transmitted by the blades 4 through the sheet material to the filter cylinder 2.
[0069] When the blade 4 moves the sheet at the lower arc segment 201, the sheet will be moved more fully in the central angle area of the lower arc segment 201 (60°-120°) to promote the sheet attached to the upper side of the lower arc segment 201 to move downward in the area close to the wall of the filter cylinder 2, promote the sheet to dehydrate by friction and gravity, and at the same time promote the uniformity of the sheet movement in the filter cylinder 2.
[0070] When the blades 4 drive the sheet material from the lower arc section 201 into the material holding section 202, the upper edge of the material holding section 202 is higher than the center of the filter cylinder 2 by a certain range (the aforementioned central angle β). The material holding section 202 achieves a gradual increase in the distance between the blades 4 and the cylinder wall, quickly reducing the extrusion and friction forces transmitted by the blades 4 to the filter cylinder 2, reducing the reset load of the reset structure, and allowing the reset structure to quickly drive the filter cylinder 2 back to the initial set position, ensuring that the lower arc section 201 always remains in the wall-adhering dewatering position directly below the bottom of the cylinder. At the same time, the increased spacing within the material holding section 202 can accommodate the frictional misalignment of multiple layers of bonded sheets, further separating the adhered sheets and releasing residual moisture between the sheets. The moisture can still flow downwards into the filtration area of the lower arc section 201 by gravity and leak out. This gives the material holding section 202 a certain space for wall-adhering material storage.
[0071] After the blade 4 rotates to the upper arc segment 203, the upper arc segment 203 of the blade 4 gently pushes the material at an appropriate interval and centrifugally throws the sheet. The blade 4 promotes the accumulation of the sheet at the feeding side of the lower arc segment 201, so that the blade 4 can guide the separated sheet back to the wall area of the feeding side of the lower arc segment 201 to enter the next round of dehydration cycle, ensuring the stable operation of continuous dehydration.
[0072] This invention optimizes the angle parameters and the rotation speed of the shaft 11 to ensure that the sheet material is stably retained on both sides of the lower arc segment 201. This forms a combination of gravity dehydration of the lower arc segment 201, friction dehydration of the sheet material retained on both sides of the lower arc segment 201, and centrifugal dehydration of the sheet material scattered by the upper arc segment 203, which greatly improves the water leakage efficiency.
[0073] exist Figure 1 In the illustrated embodiment, to further specify the structure of the present invention, the blade 4 includes a connecting rod 401 connected to the shaft 11 and a blade body 402 connected to the connecting rod 401. The width of the blade body 402 is greater than the width of the connecting rod 401. Side baffles 403 are provided on both sides of the blade body 402.
[0074] In this embodiment, the wide-body blade 402 increases the contact area with the plastic sheet, making stirring and pushing more efficient. When the blade 4 pushes the material at the lower arc segment 201, the side baffle 403 reduces the amount of sheet material entering the cavity behind the blade body 402 from the side of the blade 4. By making the width of the connecting rod 401 smaller than the width of the blade body 402, the upper layer of sheet material in the lower arc segment 201 area can be facilitated to fall, further improving the uniformity of sheet stirring and dehydration. At the same time, the width of the connecting rod 401 being smaller than the width of the blade body 402 can further reduce the rotational resistance of the blade 4.
[0075] In the illustrated embodiment, for the structure of the present invention, more specifically, the blade body 402 includes a throwing section 4021 connected to the connecting rod 401, a pushing section 4022 connected to the outside of the throwing section 4021, and a scraping section 4023 disposed on the outside of the pushing section 4022; the material-facing surface of the pushing section 4022 extends away from the rotation direction of the blade 4 in a direction away from the scraping section 4023, and the material-facing surface of the throwing section 4021 extends away from the rotation direction of the blade 4 in a direction away from the pushing section 4022.
[0076] As shown in the figure, the overall structure of blade 4 is arranged as follows:
[0077] Scraping section 4023: Located on the outermost side of the blade body 402, with a flat facing surface. The edge of the scraping section 4023 is 1.5mm away from the inner wall of the lower arc section 201 of the filter cylinder 2, precisely matching the small-pitch scraping condition of the lower arc section 201. In the illustrated embodiment, the facing surface of the scraping section 4023 is parallel to the radial direction of the filter cylinder 2 (preferably, the angle between the facing surface of the scraping section 4023 and the radial line of the filter cylinder 2 is less than 5°).
[0078] Pushing section 4022: Connected to the inside of scraping section 4023 and the outside of throwing section 4021, the material receiving surface extends from the inside to the outside in a direction away from the rotation direction of blade 4, forming a guide slope for directional pushing.
[0079] Material throwing section 4021: Located on the innermost side of the blade body 402, it is fixedly connected to the connecting rod 401. The material receiving surface extends obliquely from the inside to the outside in the direction of blade 4 rotation, forming a material throwing guide slope.
[0080] The interaction mechanism between the various regions of blade 4 and the sheet is as follows.
[0081] Scraping section 4023: The material hanging section mainly pushes and moves the material in the lower arc section 201. When the blade 4 rotates to the bottom of the filter cylinder 2, the outer scraping section 4023 scrapes the sheet against the cylinder wall, reducing the probability of filter hole blockage at the lower arc section 201 position, and the compression of the sheet is smaller.
[0082] Pushing section 4022: Its main function is to increase friction by accumulating layers in receiving section 202, thereby achieving frictional dehydration. When blade 4 rotates from lower arc section 201 to receiving section 202, the inclined welcoming surface of pushing section 4022 continuously pushes the sheet into the lower arc section 201 and the inner side of receiving section 202, continuously accumulating sheet to increase the number of sheets between pushing section 4022 and receiving section 202, thereby increasing the sheet accumulation thickness and friction layers in this area. Since scraping section 4023 continuously scrapes the sheet outside of pushing section 4022 in the area of lower arc section 201, the blade 4 mainly moves by scraping in the lower arc section 201 position. After blade 4 enters receiving section 202, the distance between pushing section 4022 and scraping section 4023 and receiving section 202 increases significantly. The multi-layer sheet squeezed into pushing section 4022 moves and rubs against each other fully in receiving section 202.
[0083] This invention optimizes the combined structure of the pushing section 4022 and the scraping section 4023. By utilizing the distance between the blade 4 and the lower arc section 201 and the distance between the material-containing section 202, the blade 4 primarily scrapes material in the lower arc section 201, expanding the core position of friction dewatering to the material-containing section 202 on the side of the filter cylinder 2, rather than the bottom lower arc section 201. On the one hand, the mutual friction between the multiple layers of sheets absorbs kinetic energy, significantly reducing the squeezing damage to the filter cylinder 2 caused by friction. On the other hand, the material-containing section 202 has a sufficient number of sheet layers, significantly improving the friction dewatering efficiency. Furthermore, the sheet in this area can loosen and fall off with slight shaking of the filter cylinder 2 and move independently, further preventing filter pore blockage.
[0084] Throwing section 4021: Its main function is to throw the sheet. When the blade 4 rotates further after the receiving section 202, the inclined receiving surface of the throwing section 4021 throws the sheet outward, using centrifugal force to peel off the residual moisture on the surface of the sheet, thus achieving centrifugal dehydration.
[0085] This three-section blade design achieves a deep synergy between dehydration function and equipment protection. Compared with the traditional one-piece blade design, it has the following advantages: First, it optimizes the dehydration station, diffusing frictional dehydration to the material holding section 202, solving the problem of easy adhesion and blockage of sheets in the solution relying on frictional dehydration of the lower arc section 201. At the same time, the repeated rotation of the filter cylinder 2 further promotes the separation of the sheet from the cylinder wall of the filter cylinder 2, greatly improving the dehydration stability. Second, it reduces equipment wear. The scraping section 4023 reduces direct friction of the lower arc section 201, and the distance between the material holding section 202 and the edge of the blade 4 is further increased, resulting in more layers of sheet material being dehydrated by friction in the material holding section 202. The sheet material has a better energy absorption and buffering effect, effectively extending the service life of the blade 4 and the filter cylinder 2. Third, it improves the dehydration quality. The triple action of scraping to clear blockage, pushing friction, and throwing centrifugal force is superimposed, taking into account gravity, friction, and centrifugal dehydration methods, resulting in more thorough dehydration of the sheet material.
[0086] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.
[0087] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A friction dewatering machine for sheet dewatering, characterized in that, include: The housing assembly includes an outer shell and a filter cylinder arranged laterally inside the outer shell. The outer shell has a feed inlet communicating with the inner side of the filter cylinder at one end and a discharge outlet communicating with the inner side of the filter cylinder at the other end. The bottom of the outer shell has a drain outlet. The stirring roller assembly includes a shaft disposed within the filter cylinder and blades disposed on the shaft, the blades being inclined relative to the axis of the shaft; The filter cylinder has lower arc segments on both sides at the bottom center position. The distance between the filter cylinder and the edge of the blade at the lower arc segment is less than 2mm, and the distance between the filter cylinder and the blade outside the lower arc segment is greater than or equal to 3mm. The filter cartridge is rotatably mounted on the outer shell, and a reset structure is provided between the filter cartridge and the outer shell. After the filter cartridge is rotated by the blade from a set position, the reset structure provides a force to the filter cartridge to rotate toward the set position. The filter cylinder has an arc-shaped material-containing section on the exit side of the lower arc segment, and an upper arc segment communicating with the material-containing section is provided on the entry side of the lower arc segment. The distance between the filter cylinder and the edge of the blade at the material-containing section is greater than the distance between the filter cylinder and the edge of the blade at the upper arc section.
2. The friction dewatering machine for sheet dewatering according to claim 1, characterized in that, The reset structure includes a spring disposed between the filter cartridge and the outer casing.
3. The friction dewatering machine for sheet dewatering according to claim 2, characterized in that, The reset structure further includes: An inner feed hopper is installed at the corresponding feed inlet position of the filter cylinder, and the inner feed hopper extends into the feed inlet; An inner discharge hopper is installed at the corresponding discharge port position of the filter cylinder, and the inner discharge hopper extends into the discharge port; The inner feed hopper and / or the inner discharge hopper are provided with the spring on one side of the blade rotation direction, and the two ends of the spring abut against the wall between the inner feed hopper and the feed port or between the wall between the inner discharge hopper and the discharge port.
4. The friction dewatering machine for sheet dewatering according to claim 3, characterized in that, The inner feed hopper and / or the inner discharge hopper are provided with a shock-absorbing block on the side away from the rotation direction of the blade, and the shock-absorbing block abuts against the inlet wall of the feed port or the outlet wall at the corresponding position.
5. A friction dewatering machine for sheet dewatering according to claim 3, characterized in that, The outer shell is provided with an outer feed hopper at the feed inlet and an outer feed hopper at the discharge outlet; The outer feed hopper is located on the top of the outer shell, and a deformable feed cylinder is provided between the inner feed hopper and the outer feed hopper; The bottom wall of the outgoing hopper is inclined downwards in a direction away from the filter cylinder. When the filter cylinder is in a set position, the bottom wall of the inner outgoing hopper is inclined downwards in a direction away from the filter cylinder.
6. A friction dewatering machine for sheet dewatering according to claim 1, characterized in that, The central angle between the two sides of the lower arc segment and the central axis of the filter cylinder is α, 60°≤α≤120°; the edge of the material-containing section away from the lower arc segment is located above the horizontal plane where the rotation center of the filter cylinder is located, and the central angle between the upper edge of the material-containing section and the horizontal plane where the rotation center of the filter cylinder is located and the center of the filter cylinder is β, 0°≤β≤30°.
7. A friction dewatering machine for sheet dewatering according to claim 1, characterized in that, The blade includes a connecting rod connected to the shaft and a blade body connected to the connecting rod. The width of the blade body is greater than the width of the connecting rod. Side baffles are provided on both sides of the blade body.
8. A friction dewatering machine for sheet dewatering according to claim 7, characterized in that, The blade body includes a throwing section connected to the connecting rod, a pushing section connected to the outside of the throwing section, and a scraping section disposed on the outside of the pushing section. The material-feeding surface of the pushing section extends away from the direction of the scraping section and away from the direction of the blade rotation, while the material-feeding surface of the throwing section extends away from the direction of the pushing section and towards the direction of the blade rotation.