Coaxial drive mechanism for a dewatering wringer

Abstract

The utility model discloses a coaxial drive mechanism of dewatering extruding machine, including conical screen frame, the coaxial extrusion rotor of conical screen frame, the rotor shaft of extrusion rotor export end is connected with the output shaft of extrusion reduction gearbox through the shaft coupling, and the input shaft of extrusion reduction gearbox is connected with the output shaft of extrusion motor, the inlet end of conical screen frame is equipped with the drum screen, and extrusion rotor coaxial extension reaches the inner chamber of drum screen, the inlet end of conical screen frame is fixedly connected with rotary drum seat, the output shaft of drum motor is connected with the input end of drum reduction gearbox, and the output shaft of drum reduction gearbox is connected with pinion shaft, and pinion is installed on pinion shaft, and pinion is engaged with the big gear, and the big gear is sleeved and fixed on the outer periphery of rotary drum seat. The mechanism is in the mode of coaxial drive, and pre-dewatering is completed, and extrusion dewatering is completed, the structure is compact, and material does not need to transfer.

Description

Technical Field

[0001] This utility model relates to a coaxial drive mechanism for a dehydrating and squeezing machine, belonging to the technical field of squeezing 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 coaxial drive mechanism for a dewatering and squeezing machine, which can complete both pre-dewatering and extrusion dewatering in a coaxial drive manner, with a compact structure and no need for material transfer.

[0011] To solve the above technical problems, this utility model provides a coaxial drive mechanism for a dewatering and squeezing machine, including a conical screen frame. A squeezing rotor is coaxially mounted within the conical screen frame. Spiral blades that push the material towards the outlet end are wound around the outer circumference of the squeezing rotor. The squeezing rotor shaft at the outlet end of the squeezing rotor is connected to the output shaft of a squeezing reduction gearbox via a coupling. The input shaft of the squeezing reduction gearbox is connected to the output shaft of a squeezing motor. A rotary dewatering device is provided at the inlet end of the conical screen frame, and the rotary dewatering device includes:

[0012] A drum screen is rotatably disposed within the pre-dehydration tank and has a plurality of screen holes, and the extrusion rotor extends coaxially into the inner cavity of the drum screen.

[0013] A rotating drum base is coaxially and fixedly connected to the inlet end of the drum screen.

[0014] The roller drive mechanism includes a roller motor, a roller reducer, a pinion, and a large gear fixedly connected to the rotating roller base. The output shaft of the roller motor is connected to the input end of the roller reducer, and the output shaft of the roller reducer is connected to the pinion shaft. A pinion is mounted on the pinion shaft, and the pinion meshes with the large gear. The large gear is fitted and fixed on the outer periphery of the rotating roller base.

[0015] Furthermore, the inner cavity of the rotating drum seat is coaxially provided with a fixed feed pipe, and the squeezing rotor shaft at the inlet end of the extrusion rotor passes through the fixed feed pipe and is supported on the inlet end bracket by the squeezing rotor bearing seat.

[0016] Furthermore, the roller reducer is located in the opening at the center of the bottom of the inlet end bracket.

[0017] Furthermore, the outlet end of the drum screen is connected to an inner drum retaining ring, and the extrusion inlet seat is fixed to the inlet end of the conical screen frame; the outer periphery of the inner drum retaining ring is evenly distributed with reinforcing ribs, and a supporting drum is sleeved on the outer periphery of the reinforcing ribs; the supporting drum is coaxial with the inner drum retaining ring and serves as a drum track; three supporting wheel assemblies are symmetrically supported on the outer periphery of the supporting drum.

[0018] Furthermore, two support wheel assemblies are symmetrically supported on both sides of the bottom of the outlet end of the rotating roller seat.

[0019] Compared with the prior art, the advantages or beneficial effects of the embodiments of this application include at least the following: 1. The method of combining rotary dehydration and extrusion dehydration is more in line with the material dehydration process; the material enters the rotary dehydration section from the feed port and is pre-dehydrated 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%;

[0020] 2. The pre-dehydration and screw extrusion are integrated into one unit. This modular design reduces the floor space required, saves space, and reduces the need for process equipment and piping. It also reduces material handling costs and lowers the investment in this section by 50%.

[0021] 3. The combination of pre-dehydration and screw extrusion causes the material to exhibit a circular to linear motion trajectory. The pre-dehydration mechanism bears gravity and rotational force, while the screw extrusion mechanism bears axial force and rotational force. Attached Figure Description

[0022] 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:

[0023] Figure 1 This is a front view of the coaxial drive mechanism of the dehydration and squeezing machine of this utility model;

[0024] Figure 2 for Figure 1Enlarged view on the right;

[0025] Figure 3 for Figure 1 A three-dimensional sectional view;

[0026] Reference numerals: 1. Feed hopper; 2. Rotating drum seat; 3. Fixed feed pipe; 4. Large gear; 5. Extrusion rotor; 5a. Extrusion rotor shaft; 5b. Spiral blade; 6. Extrusion rotor bearing seat; 7. Inlet end support; 8. Drum screen; 9. Inner drum retaining ring; 10. Support drum; 11. Support wheel assembly; 12. Drum motor; 13. Drum gearbox; 14. Pinion; 14a. Pinion shaft; 15. Pinion bearing seat; 16. Pre-dehydration box; 17. Extrusion section box; 18. Extrusion inlet seat; 19. Conical screen frame; 20. Extrusion motor; 21. Extrusion gearbox; 22. Coupling. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figures 1 to 3As shown, in this invention, the pre-dehydration chamber 16 is connected to the inlet end of the extrusion section chamber 17. The inner cavity of the extrusion section chamber 17 is provided with a conical screen frame 19. The inlet end of the conical screen frame 19 is fixedly connected to the 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-dehydration chamber 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 5 coaxial with it. The extrusion rotor 5 is a hollow structure and has spiral blades 5b wound around its outer periphery. The height of the spiral blades 5b at the inlet end is greater than the height of the spiral blades 5b at the extrusion end. The outer edge of the spiral blades 5b abuts against the inner wall of the conical screen frame 19. As the extrusion rotor 5 rotates, the spiral blades 5b push the material towards the extrusion end. Because the space between the conical screen frame 19 and the extrusion rotor 5 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 5b, 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.

[0031] The two ends of the extrusion rotor 5 are closed and connected to the extrusion rotor shaft 5a respectively. The middle part of the extrusion rotor shaft 5a at the outlet end is supported on the outer wall of the discharge end box by the extrusion rotor bearing seat 6. The outer end of the extrusion rotor shaft 5a at the outlet end is connected to the output shaft of the extrusion reduction gearbox 21 through the coupling 22. The input end of the extrusion reduction gearbox 21 is driven by the extrusion motor 20. The bottom of the extrusion motor 20 and the extrusion reduction gearbox 21 are respectively fixed to the discharge end of the base.

[0032] The inlet end of the extrusion rotor 5 extends through the central hole of the extrusion inlet seat 18 into the inner cavity of the pre-dehydration tank 16, and the spiral blades 5b wound around its outer periphery also extend into the inner cavity of the pre-dehydration tank 16, for conveying the material in the pre-dehydration tank 16 to the inner cavity of the conical screen frame 19. The squeezing rotor shaft 5a at the inlet end of the extrusion rotor 5 passes through the center of the outer side wall of the pre-dehydration tank 16, and its outer end is supported on the inlet end bracket 7 by the squeezing rotor bearing seat 6. The bottom of the inlet end bracket 7 is supported on the feed end of the base.

[0033] The inner cavity of the pre-dehydration tank 16 is equipped with a drum screen 8. The drum screen 8 is located on the outer periphery of the inlet end of the extrusion rotor 5 and is coaxial with the extrusion rotor 5. Multiple screen holes are evenly distributed on the circumference of the drum screen 8 for drainage.

[0034] 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.

[0035] 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 below.

[0036] 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.

[0037] The inlet end of the drum screen 8 is connected to a rotating drum seat 2 coaxial with it. The two are fixed to each other by flanges and bolts. The rotating drum seat 2 is located on the outside of the pre-dehydration tank 16.

[0038] Two sets of support wheel assemblies 11 are symmetrically arranged below the outlet end of the rotating drum seat 2. The rotating drum seat 2, the drum screen 8, the inner drum retaining ring 9, and the support drum 10 are fixedly connected to form a whole for centrifugal dewatering. Both ends are stably supported by a total of five drum support wheels.

[0039] The outer diameter of the inlet end of the rotating drum seat 2 is smaller than that of the outlet end, and a large gear 4 is fixed to the outer circumference of the inlet end. A small gear 14 meshes with the bottom of the large gear 4. The small gear 14 is fixed in the middle of the small gear shaft 14a. Both ends of the small gear shaft 14a are supported in small gear bearing seats 15. The bottom of the two small gear bearing seats 15 is fixed to the base by brackets. One end of the small gear shaft 14a is connected to the output shaft of the drum reducer 13 through a coupling. The drum reducer 13 is fixed to the base and passes through the hole at the bottom of the inlet end bracket 7. The input end of the drum reducer 13 is driven by the drum motor 12.

[0040] The inner cavity of the rotating drum base 2 is provided with a fixed feed pipe 3 coaxial with it. The outlet end of the fixed feed pipe 3 passes through the center hole of the end plate at the outlet end of the rotating drum base 2, so that the outlet of the fixed feed pipe 3 communicates with the inner cavity space of the drum screen 8. The squeezing rotor shaft 5a at the inlet end of the extrusion rotor 5 passes through the fixed feed pipe 3, and an annular feeding channel is formed between the squeezing rotor shaft 5a and the fixed feed pipe 3. The outer side of the rotating drum base 2 is provided with a feed hopper 1, which is fixed to the external steel beam or the connection port. The chute outlet at the lower end of the feed hopper 1 is inserted into the inlet end of the fixed feed pipe 3 and welded to it.

[0041] Material such as starch enters the annular feeding channel from the feed hopper 1 and then enters the inner cavity of the drum screen 8. The drum motor 12 drives the pinion shaft 14a and pinion 14 to rotate through the drum reducer 13. The pinion 14 drives the large gear 4 to rotate, and the large gear 4 drives the rotating drum base 2, drum screen 8, inner drum retaining ring 9, and support drum 10 to rotate synchronously. Under the action of centrifugal force, a large amount of free water in the starch that has just been fed in quickly passes through the drum screen 8 for rapid dehydration and falls into the pre-dehydration hopper for discharge. After the free water has been removed, the material is fed into the inner cavity of the conical screen frame 19 by the spiral blades 5b of the extrusion rotor 5, where a small amount of free water and bound water are further squeezed out.

[0042] 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 coaxial drive mechanism for a dewatering and squeezing machine, comprising a conical screen frame (19), wherein a squeezing rotor (5) is coaxially disposed in the conical screen frame (19), and the outer periphery of the squeezing rotor (5) is wound with spiral blades (23b) for pushing material toward the outlet end, characterized in that: The squeezing rotor shaft (5a) at the outlet end of the extrusion rotor (5) is connected to the output shaft of the extrusion gearbox (21) via a coupling (22), and the input shaft of the extrusion gearbox (21) is connected to the output shaft of the extrusion motor (20); the inlet end of the conical screen frame (19) is provided with a rotary dewatering device, which includes: A drum screen (8) is rotatably disposed in a pre-dehydration tank (16) and has a number of screen holes. The extrusion rotor (5) extends coaxially into the inner cavity of the drum screen (8). The rotating drum seat (2) is coaxially fixedly connected to the inlet end of the drum screen (8); The roller drive mechanism includes a roller motor (12), a roller reducer (13), a pinion (14), and a large gear (4) fixedly connected to the rotating roller seat (2). The output shaft of the roller motor (12) is connected to the input end of the roller reducer (13), and the output shaft of the roller reducer (13) is connected to the pinion shaft (14a). The pinion (14) is mounted on the pinion shaft (14a), and the pinion (14) meshes with the large gear (4). The large gear (4) is fitted and fixed on the outer periphery of the rotating roller seat (2).

2. The coaxial drive mechanism of the dehydrator according to claim 1, characterized in that, The inner cavity of the rotating drum seat (2) is coaxially provided with a fixed feed pipe (3), and the squeezing rotor shaft (5a) at the inlet end of the extrusion rotor (5) passes through the fixed feed pipe (3) and is supported on the inlet end bracket (7) by the squeezing rotor bearing seat (6).

3. The coaxial drive mechanism of the dehydrator according to claim 2, characterized in that, The roller reducer (13) is located in the opening at the center of the bottom of the inlet end bracket (7).

4. The coaxial drive mechanism of the dehydrator according to claim 1, characterized in that: The outlet end of the drum screen (8) is connected to the inner drum retaining ring (9), and the extrusion inlet seat (18) is fixed to the inlet end of the conical screen frame (19). The outer periphery of the inner drum retaining ring (9) is evenly distributed with reinforcing ribs, and a support roller (10) is sleeved on the outer periphery of the reinforcing ribs. The support roller (10) is coaxial with the inner drum retaining ring (9) and serves as a roller track. The outer periphery of the support roller (10) is symmetrically supported by three support wheel assemblies (11).

5. The coaxial drive mechanism of the dehydrator according to claim 4, characterized in that: The bottom of the outlet end of the rotating roller seat (2) is symmetrically supported by two support wheel assemblies (11).

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