A rotary cloth dewatering device

Abstract

This utility model discloses a rotary fabric dewatering device. The pre-dewatering chamber includes: a drum screen rotatably mounted within the chamber and having several screen holes; a rotating drum base coaxially fixed to the drum screen, extending beyond the feed end of the pre-dewatering chamber and sealed to each other; an inner end plate integrally connected to the inner port of the rotating drum base; and a feed distributor installed at the outer port of the rotating drum base. The feed distributor includes an integrally connected pre-dewatering central shaft, a feed distribution plate, and feed pipes. The inner end of the pre-dewatering central shaft is welded to the center of the feed distribution plate. The outer edge of the feed distribution plate is fixed to the outer port of the rotating drum base with screws. Multiple feed distribution holes are symmetrically arranged on the circumference of the feed distribution plate near its center. The inlet end of each feed pipe is welded into the corresponding feed distribution hole, and the outlet end of each feed pipe passes through the corresponding pipe hole in the inner end plate of the drum base and is sealed to each other. This device has low energy consumption and a high dewatering rate.

Description

Technical Field

[0001] This utility model relates to a rotary fabric dewatering device, belonging to the technical field of extrusion equipment. Background Technology

[0002] Dewatering machines are widely used in various industries such as food, chemicals, and environmental protection. Their working principle is similar to manually squeezing water from a wet towel; they remove moisture from materials through a screw-type mechanical pressing method, thus achieving dehydration. Dewatering machines primarily separate the liquid from materials through screw extrusion, thereby achieving dehydration. They operate using physical pressing, requiring no external heat source, have a simple structure, and are suitable for a variety of materials. Therefore, dewatering materials before drying reduces energy consumption and drying costs, offering significant economic value.

[0003] Traditional dewatering machines are generally screw extruders, mainly composed of a frame, drive unit, feeding device, extrusion and dewatering device, and discharge device. Material is fed into the extrusion and dewatering section by the feeding device. The distance between the screw shaft and the outer casing of the extrusion and dewatering section is not uniform; the distance from the feeding section to the discharge end gradually decreases. Therefore, as the material advances under the action of the screw shaft in the extrusion and dewatering section, the pressure it experiences also continuously increases. The liquid in the material is squeezed out through the sieve openings of the outer casing, completing the initial dewatering.

[0004] In the starch industry, raw materials such as corn germ and epidermal fiber are initially dehydrated by a dehydrator before drying. Therefore, the dehydration rate of the dehydrator has a great influence on the energy consumption of the subsequent drying process. The higher the dehydration rate in the dehydration stage, the less energy is consumed in the drying stage, and the lower the drying cost.

[0005] Traditional extruders mainly use straight shaft + conical screen, conical shaft + straight screen, or multi-section variable diameter + variable spiral for extrusion and dewatering. None of these methods have an effective pre-dewatering function, resulting in high moisture content at the feed end and excessive leakage at the sealing end, thus leading to poor dewatering performance.

[0006] Chinese utility model patent CN 221349637U discloses a squeeze dryer, including a frame with a channel for materials to pass through; slides symmetrically arranged on both sides of the frame, the length direction of the slides being perpendicular to the direction of material movement; a squeeze roller assembly having two squeeze rollers oppositely arranged on both sides of the direction of material movement; sliding seats at both ends of the squeeze rollers cooperating with the slides; a drying assembly mounted on the frame and located on the discharge side of the squeeze roller assembly; and a roller gap measuring assembly for measuring the distance between the two squeeze rollers. This squeeze dryer avoids introducing moisture into subsequent processes by combining squeezing and drying. However, it requires a larger airflow device, necessitating the addition of a pneumatic cylinder, increasing the footprint and time consumption.

[0007] In the starch industry, traditional extruders primarily use gradually increasing pressure to squeeze out moisture from materials with high humidity. This results in much of the initially squeezed-out free water being trapped between the material particles, making it difficult to dry completely. Furthermore, it leads to inconsistent moisture content between the internal and external materials, with the internal material having a higher moisture content than the external material, which is detrimental to subsequent drying. The presence of a large amount of initially trapped free water at the feed end also makes front-end sealing difficult. Utility Model Content

[0008] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0009] In view of the problems existing in the above and / or prior art, this utility model is proposed.

[0010] The purpose of this invention is to overcome the problems existing in the prior art and provide a rotary fabric dewatering device that pre-dewaters the fabric before extrusion, thereby greatly reducing extrusion energy consumption and resulting in low and uniform moisture content in the material.

[0011] To solve the above technical problems, this utility model provides a rotary fabric dewatering device, including a pre-dewatering chamber, wherein a rotary pre-dewatering device is provided in the pre-dewatering chamber, and the rotary pre-dewatering device includes:

[0012] A drum screen is rotatably disposed within the pre-dehydration tank and has several screen holes;

[0013] The rotating drum seat is coaxially fixed with the drum screen, extends out of the feed end of the pre-dehydration tank and is sealed to each other;

[0014] The inner port of the rotating drum seat is provided with an inner end plate of the drum seat integrated therewith; the outer port of the rotating drum seat is equipped with a feed distributor, the feed distributor includes a pre-dehydration central shaft, a feed distribution plate and a feed pipe integrated therewith, the inner end of the pre-dehydration central shaft is welded to the center of the feed distribution plate, the outer edge of the feed distribution plate is fixed to the outer port of the rotating drum seat by screws, a plurality of feed distribution holes are symmetrically provided on the circumference of the feed distribution plate near the center, the inlet end of each feed pipe is welded into the corresponding feed distribution hole, and the outlet end of each feed pipe passes through the corresponding pipe hole of the inner end plate of the drum seat and is sealed to each other.

[0015] Furthermore, a transition plate is fixedly connected to the outer end face of the feeding distribution plate and they are sealed to each other. The transition plate has a through hole that communicates with the corresponding feeding distribution hole. The outer end face of the transition plate abuts against a fixed feeding disc. The fixed feeding disc is a double-layered cylindrical structure with both ends closed. End face seals are respectively embedded on the inner and outer circumferences of the opposite end faces of the fixed feeding disc and the transition plate to achieve rotational sealing. A thickened feeding end face sealing plate is welded to the inner end face of the fixed feeding disc. Multiple through annular long grooves are evenly provided on the annular end face of the feeding end face sealing plate. The top inlet of the fixed feeding disc is connected to the outlet of the feeding hopper. The pre-dehydration central shaft passes through the inner cylinder of the fixed feeding disc.

[0016] Furthermore, the middle section of the pre-dehydration center shaft is supported on the pre-dehydration bearing bracket by a pre-dehydration bearing seat, and the outer end of the pre-dehydration center shaft is connected to the output shaft of the roller reducer through a coupling. The input shaft of the roller reducer is connected to the output shaft of the roller motor.

[0017] Compared with the prior art, the advantages or beneficial effects of the embodiments of this application include at least the following: 1. Rotary pre-dehydration is adopted before extrusion dehydration, which is more in line with the material dehydration process; the material enters the rotary dehydration section from the feed port and undergoes pre-dehydration first, and most of the free water is quickly removed under the action of centrifugal force; then it enters the extrusion section to remove the remaining small amount of free water and bound water, so that the overall water content of the material is low and uniform, and the dehydration rate of one piece of equipment is increased by more than 10%;

[0018] 2. Pre-dehydration is integrated at the inlet of the dewatering process. The modular design reduces the floor space required, saves space, and reduces the investment in this section by 50%.

[0019] 3. The feed distributor rotates to distribute the material while simultaneously driving the drum screen to rotate and dewater. A transition plate is fixed on the feed distribution plate and connects with the sealing plate on the feed end face, facilitating replacement of the transition plate after wear. During the rotation of the transition plate, the through holes of each transition plate are always connected to the annular groove on the sealing plate on the feed end face, ensuring the uniformity of the feed. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings are provided for reference and illustration only and are not intended to limit this utility model. Wherein:

[0021] Figure 1 This is a front view of the rotary fabric dewatering device of this utility model;

[0022] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0023] Figure 3 for Figure 1 Three-dimensional structure of the feed distributor section Figure 1 ;

[0024] Figure 4 for Figure 1 Three-dimensional structure of the feed distributor section Figure 2 ;

[0025] Figure 5 for Figure 1 A three-dimensional image;

[0026] Attached reference numerals: 1. Feed hopper;

[0027] 2. Fixed feed tray; 2a. Feed end face sealing plate;

[0028] 3. Transition plate; 3a. Through hole in transition plate;

[0029] 4. Feed distributor; 4a. Pre-dehydration central shaft; 4b. Feed distribution plate; 4c. Feed pipe;

[0030] 5. Rotating roller seat; 5a. Inner end plate of roller seat; 5b. Reinforcing rib plate; 5c. Frame oil seal;

[0031] 6. Intermediate bearing housing; 7. Intermediate bearing; 8. Drum screen; 9. Inner retaining ring of the drum; 10. Support drum; 11. Support wheel assembly; 12. Drum motor; 13. Drum gearbox; 14. Coupling; 15. Pre-dehydrated bearing housing;

[0032] 16. Pre-dehydration tank; 16a. Pre-dehydration water collection hopper;

[0033] 17. Extrusion section housing; 18. Extrusion inlet seat; 19. Conical screen frame;

[0034] 20. Extrusion rotor; 20a. Extrusion rotor shaft; 20b. Helical blades;

[0035] 21. Pre-dehydrated bearing bracket. Detailed Implementation

[0036] In the following description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0037] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0039] like Figures 1 to 5 As shown, the rotary fabric dewatering device of this utility model includes a feeding hopper 1 and a pre-dewatering box 16, which is connected to the inlet end of the squeezing section box 17. The inner cavity of the squeezing section box 17 is provided with a conical screen frame 19, the inlet end of which is fixedly connected to an extrusion inlet seat 18. The extrusion inlet seat 18 is annular and its outer periphery is embedded in the side wall of the outlet end of the pre-dewatering box 16. The diameter of the outlet end of the conical screen frame 19 is smaller than the diameter of the inlet end. The inner cavity of the conical screen frame 19 is provided with an extrusion rotor 20 coaxial with it. The extrusion rotor 20 is a hollow structure with spiral blades 20b wound around its outer periphery. The height of the spiral blades 20b at the inlet end is greater than the height of the spiral blades 20b at the extrusion end, and the outer edge of the spiral blades 20b abuts against the inner wall of the conical screen frame 19.

[0040] As the extrusion rotor 20 rotates, the spiral blades 20b push the material towards the extrusion end. Because the space between the conical screen frame 19 and the extrusion rotor 20 becomes smaller closer to the extrusion end, the material is compressed, and the pressure on the material continuously increases during the conveying process. The increasing pressure gradually squeezes out the moisture, which is then discharged through the gaps in the conical screen frame 19. During the extrusion conveying process, the material is continuously tumbled under the action of the spiral blades 20b, causing the inner material to flip to the outer side. This allows the material originally on the outer side to be compressed and dehydrated from the screen frame side. In this way, both the inner and outer materials are fully compressed, improving the material dehydration rate.

[0041] The extrusion rotor 20 is closed at both ends and connected to the squeezing rotor shaft 20a respectively. The inlet end of the extrusion rotor 20 extends through the center hole of the extrusion inlet seat 18 to the inner cavity of the pre-dehydration box 16, and the spiral blades 20b wound around the outer periphery also extend to the inner cavity of the pre-dehydration box 16 to convey the material in the pre-dehydration box 16 to the extrusion dehydration section.

[0042] The inner cavity of the pre-dehydration tank 16 is provided with a drum screen 8. The drum screen 8 is located on the outer periphery of the inlet end of the extrusion rotor 20 and is coaxial with the extrusion rotor 20. Multiple screen holes are evenly distributed on the circumference of the drum screen 8 for drainage. The bottom of the pre-dehydration tank 16 is provided with a pre-dehydration hopper 16a for collecting the drainage of the drum screen 8.

[0043] Flanges are welded to both ends of the drum screen 8. The outlet flange of the drum screen 8 is connected to the inner retaining ring 9 of the drum. The inner retaining ring 9 includes a reduced diameter section and a flared opening that connects to the outlet of the drum screen 8. Multiple axially extending and evenly distributed reinforcing ribs are welded to the outer periphery of the drum screen 8 and the inner retaining ring 9 to improve strength. A supporting roller 10 is fitted around the reinforcing ribs of the reduced diameter section of the inner retaining ring 9 as a roller track.

[0044] The outlet end of the inner retaining ring 9 of the roller is embedded in the groove of the extrusion inlet seat 18, with gaps between them to form a labyrinth seal. Water seeping out from the gap is discharged into the pre-dehydration hopper 16a below.

[0045] The outer periphery of the support roller 10 is provided with three support wheel assemblies 11 that abut against the outlet end of its outer wall. The three sets of support wheel assemblies 11 are distributed in an equilateral triangle to support the inner end of the drum screen 8.

[0046] The inlet end of the drum screen 8 is connected to a coaxial rotating drum seat 5. The two are fixed together by flanges and bolts. The rotating drum seat 5, drum screen 8, inner drum retaining ring 9, and support drum 10 are fixedly connected to form a whole for centrifugal dewatering. The rotating drum seat 5 is located on the outside of the pre-dewatering tank 16. The outer edge of the flange at the outlet end of the rotating drum seat 5 is embedded in the central hole of the side wall at the inlet end of the pre-dewatering tank 16 and is sealed to each other by a skeleton oil seal 5c.

[0047] The inner port of the rotating drum seat 5 is provided with an inner end plate 5a integrally connected to it. Multiple reinforcing ribs 5b are welded between the inner peripheral wall of the rotating drum seat 5 and the inner end plate 5a. The outer port of the rotating drum seat 5 is equipped with a feed distributor 4. The feed distributor 4 includes a pre-dehydration central shaft 4a, a feed distribution plate 4b, and a feed pipe 4c integrally connected. The inner end of the pre-dehydration central shaft 4a is welded to the center of the feed distribution plate 4b. The outer edge of the feed distribution plate 4b is fixed to the outer port of the rotating drum seat 5 by screws. Multiple feed distribution holes are symmetrically arranged on the circumference of the feed distribution plate 4b near the center. The inlet end of each feed pipe 4c is welded into the corresponding feed distribution hole. The outlet end of each feed pipe 4c passes through the corresponding pipe hole of the inner end plate 5a and is sealed to each other.

[0048] The middle section of the pre-dehydration central shaft 4a is supported on the pre-dehydration bearing bracket 21 via the pre-dehydration bearing seat 15. The outer end of the pre-dehydration central shaft 4a is connected to the output shaft of the roller reducer 13 via the coupling 14. The input shaft of the roller reducer 13 is connected to the output shaft of the roller motor 12. The bottoms of the roller motor 12, the roller reducer 13, and the pre-dehydration bearing seat 15 are respectively fixed to the base via brackets. After the output shaft of the roller motor 12 is reduced in speed by the roller reducer 13, it drives the pre-dehydration central shaft 4a to rotate via the coupling 14. The pre-dehydration central shaft 4a drives the feed distributor 4, the rotating roller seat 5, and the roller screen 8 to rotate, thereby pre-removing free water from the material through centrifugal force.

[0049] The outer end face of the feed distribution plate 4b is fixedly connected to the transition plate 3 and they are sealed to each other. The transition plate 3 is provided with a transition plate through hole 3a that communicates with the corresponding feed distribution hole. The outer end face of the transition plate 3 abuts against the fixed feed plate 2. The fixed feed plate 2 is a double-layer cylinder with closed ends. The inner and outer circumferences of the facing end faces of the fixed feed plate 2 and the transition plate 3 are respectively fitted with end face seals to achieve rotational sealing. The inner end face of the fixed feed plate 2 is welded with a thickened feed end face sealing plate 2a. The annular end face of the feed end face sealing plate 2a is uniformly provided with multiple through annular long grooves. The top inlet of the fixed feed plate 2 is connected to the outlet of the feed hopper 1. The pre-dehydration central shaft 4a passes through the inner cylinder of the fixed feed plate 2.

[0050] Materials such as starch flow from the feed hopper 1 into the fixed feed plate 2, enter the transition plate through the annular groove on the feed end sealing plate 2a and the feed hole on the feed distribution plate 4b, and then enter the inner cavity of the drum screen 8 through each feed pipe 4c.

[0051] The drum motor 12 drives the pre-dehydration center shaft 4a to rotate via the drum reducer 13 and coupling 14. The pre-dehydration center shaft 4a drives the feed distributor 4, rotating drum seat 5, drum screen 8, drum inner retaining ring 9, and support drum 10 to rotate synchronously. Under the action of centrifugal force, a large amount of free water in the freshly fed starch quickly passes through the drum screen 8 for rapid dehydration and falls into the pre-dehydration water collection hopper 16a for discharge. The material after the free water has been removed is fed into the inner cavity of the conical screen frame 19 by the spiral blades 20b of the extrusion rotor 20, where a small amount of free water and bound water are further extruded.

[0052] The squeezing rotor shaft 20a at the inlet end of the extrusion rotor 20 passes through the center hole of the inner end plate 5a of the roller seat and is supported in the intermediate bearing seat 6 by the intermediate bearing 7. The two ends of the intermediate bearing 7 are respectively provided with sealing rings. The inner end face of the intermediate bearing seat 6 is fixedly connected to the inner end plate 5a of the roller seat. The end face of the intermediate bearing seat 6 is provided with an annular protrusion and is fitted into the annular groove in the center of the outlet end plate of the rotating roller seat 5 to achieve accurate positioning.

[0053] The inner ring of the intermediate bearing 7 rotates with the extrusion rotor 20, and the outer ring of the intermediate bearing 7 rotates with the rotating drum seat, so that the extrusion rotor 20 and the drum screen 8 rotate independently of each other.

[0054] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A rotary fabric dewatering device, comprising a pre-dewatering chamber (16), characterized in that: The pre-dehydration tank (16) is equipped with a rotary pre-dehydration device, which includes: A drum screen (8) is rotatably disposed inside the pre-dehydration tank (16) and has a number of screen holes; The rotating drum seat (5) is coaxially fixed with the drum screen (8), extends out of the feed end of the pre-dehydration box (16) and is sealed to each other; The inner port of the rotating drum seat (5) is provided with an inner end plate (5a) of the drum seat integrated therewith; the outer port of the rotating drum seat (5) is equipped with a feed distributor (4), the feed distributor (4) includes a pre-dehydration central shaft (4a), a feed distribution plate (4b) and a feed pipe (4c) integrated therewith. The inner end of the pre-dehydration central shaft (4a) is welded to the center of the feed distribution plate (4b). The outer edge of the feed distribution plate (4b) is fixed to the outer port of the rotating drum seat (5) by screws. Multiple feed distribution holes are symmetrically provided on the circumference of the feed distribution plate (4b) near the center. The inlet end of each feed pipe (4c) is welded into the corresponding feed distribution hole. The outlet end of each feed pipe (4c) passes through the corresponding pipe hole of the inner end plate (5a) of the drum seat and is sealed to each other.

2. The rotary fabric dewatering device according to claim 1, characterized in that, The outer end face of the feed distribution plate (4b) is fixedly connected to the transition plate (3) and they are sealed to each other. The transition plate (3) is provided with a transition plate through hole that is connected to the corresponding feed distribution hole. The outer end face of the transition plate (3) abuts against the fixed feed plate (2). The fixed feed plate (2) is a double-layer cylinder with closed ends. The inner and outer circumferences of the fixed feed plate (2) and the transition plate are respectively fitted with end face seals to achieve rotational sealing. The inner end face of the fixed feed plate (2) is welded with a thickened feed end face sealing plate (2a). The annular end face of the feed end face sealing plate (2a) is uniformly provided with multiple through annular long grooves. The top inlet of the fixed feed plate (2) is connected to the outlet of the feed hopper (1). The pre-dehydration central shaft (4a) passes through the inner cylinder of the fixed feed plate (2).

3. A rotary fabric dewatering device according to claim 1 or 2, characterized in that, The middle section of the pre-dehydration center shaft (4a) is supported on the pre-dehydration bearing bracket (21) by the pre-dehydration bearing seat (15). The outer end of the pre-dehydration center shaft (4a) is connected to the output shaft of the roller reducer (13) through the coupling (14). The input shaft of the roller reducer (13) is connected to the output shaft of the roller motor (12).

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