A centrifugal mechanism for paper towel production

Abstract

This utility model relates to the field of papermaking equipment technology, and in particular to a centrifugal mechanism for paper towel preparation. It includes a support frame, a processing box mounted on top of the support frame, and symmetrical discharge ports on the left and right sides of the lower part of the processing box. A rotating seat is rotatably mounted at the bottom of the processing box, and a positioning protrusion is provided on the top of the rotating seat. By setting a positioning protrusion on the top of the rotating seat and a matching limiting sleeve groove at the bottom of the centrifugal drum, a snap-fit ​​structure for circumferential transmission and axial positioning is formed. Simultaneously, an automatic locking mechanism consisting of a wedge-shaped locking block and a first elastic element is configured between the fixed sleeve and the rotating sleeve at the upper part of the centrifugal drum. During installation, simply pressing the centrifugal drum vertically downwards completes the double locking under the guidance of the inclined surface and the elastic reset action. During disassembly, pulling upwards automatically unlocks the mechanism. The entire process requires no tools, significantly reducing equipment downtime and greatly improving the efficiency of cleaning, replacement, and daily maintenance.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, and in particular to a centrifugal mechanism for preparing paper towels. Background Technology

[0002] In the production of tissues, toilet paper, and household paper, raw material preparation is one of the key steps that determines the quality of the final product. Among them, the purity of pulp and the fiber grading effect directly affect the softness, strength, and water absorption of the paper. In order to obtain high-quality fine fiber pulp, the raw pulp usually needs to be refined to remove coarse fibers, impurities, and incompletely dissociated fiber bundles. This process is often achieved by centrifugal separation technology. As an efficient solid-liquid or solid-solid separation device, its basic principle is to use the centrifugal force field generated by high-speed rotation to make the effective fiber pulp with lower density or finer particle size pass through the screen and be discharged under the action of centrifugal force, while the heavier or larger impurities and coarse residues are trapped inside the screen drum, thereby achieving the grading and purification of fiber components.

[0003] Patent CN219430385U discloses a pulp impurity separation device. This device includes a housing containing an outer separation cylinder and an inner separation cylinder arranged coaxially. The inner separation cylinder is located inside the outer separation cylinder. Both cylinders have multiple sieve holes on their side walls. During operation, the pulp first enters the inner separation cylinder, where the sieve holes are relatively large, primarily used to trap large particles for preliminary coarse filtration. The pulp then passes through the inner cylinder wall into the outer separation cylinder area. The outer separation cylinder also contains a filter screen with smaller sieve holes than the inner separation cylinder, further intercepting medium-sized impurities for secondary fine filtration. Through this dual-stage sieving structure design, the device... The device can trap impurities of different particle sizes in different areas. Larger impurities are retained in the inner separation cylinder, while finer impurities gather between the filter screen and the outer separation cylinder. This avoids all impurities accumulating in a single chamber and causing screen clogging, thereby improving overall filtration stability and throughput retention. However, there are still some shortcomings in practical applications. The separation cylinder structure is relatively inconvenient to clean. The inner separation cylinder is connected to the motor drive via a bevel gear transmission assembly, and its assembly structure is complex, making it impossible to disassemble and clean it as a whole. The connection between the outer separation cylinder and the housing relies on bolt fastening, making the disassembly and assembly process cumbersome and requiring the use of special tools such as wrenches, which increases maintenance costs and downtime.

[0004] Therefore, there is an urgent need to provide a centrifugal mechanism for paper towel preparation that allows for quick assembly and disassembly for cleaning and maintenance. Utility Model Content

[0005] In order to overcome the shortcomings of existing pulp centrifugal separation equipment, such as the inability to disassemble the centrifuge tank or the cumbersome disassembly and assembly process, which leads to difficulties in cleaning and maintenance, this utility model provides a centrifugal mechanism for paper towel preparation that enables quick disassembly and assembly for cleaning and maintenance.

[0006] To address the aforementioned problems, this utility model adopts the following technical solution: a centrifugal mechanism for preparing tissue paper, comprising a support frame, a processing box mounted on the top of the support frame, and symmetrically arranged discharge ports on both sides of the lower part of the processing box. A rotating seat is rotatably mounted inside the bottom of the processing box, and a positioning protrusion is provided on the top of the rotating seat. A servo motor is mounted on the bottom outside the processing box, and the output shaft of the servo motor vertically extends upward through the bottom of the processing box and is fixedly connected to the rotating seat to achieve power transmission. A centrifugal drum is detachably mounted on the rotating seat via a snap-fit ​​connection, and a limit sleeve is provided at the bottom of the centrifugal drum. The centrifuge drum is provided with a groove structure that matches the positioning protrusion. A rotating sleeve is fitted on the upper end of the centrifuge drum. An annular guide rail structure is provided on the top of the processing box. The annular guide rail structure slides in conjunction with the rotating sleeve. Fixed plates are symmetrically fixed to both sides of the rotating sleeve. A sliding rod is slidably provided on the fixed plate. A wedge-shaped block is fixed to one end of the sliding rod facing the centrifuge drum. A first elastic element is fitted on the sliding rod. The two ends of the first elastic element are fixedly connected to the fixed plate and the wedge-shaped block, respectively. A fixed sleeve is fixedly installed on the upper end of the centrifuge drum. The fixed sleeve has symmetrical slots on both sides that match the wedge-shaped block.

[0007] Furthermore, it is particularly preferred that multiple guide rods are fixedly connected inside the processing box, and each guide rod is slidably equipped with a slider. The sliders are all fixedly connected to an annular cleaning brush, which is sleeved on the outside of the centrifuge tank. Each guide rod is equipped with a second elastic element, and the upper and lower ends of the second elastic element are fixedly connected to the processing box and the slider, respectively.

[0008] Furthermore, it is particularly preferred that the top of the centrifuge tank is covered with a protective cap.

[0009] Furthermore, it is particularly preferred that a protective shell is provided at the bottom of the processing box, and the protective shell covers the outside of the servo motor.

[0010] Furthermore, it is particularly preferred that the support frame is equipped with collection boxes on both sides, and the collection boxes are located directly below the discharge port.

[0011] Furthermore, it is particularly preferred that the support frame is provided with U-shaped limiting plates on both sides, and the U-shaped limiting plates are located on one side of the collection box.

[0012] Compared with the prior art, the present invention has the following technical effects: 1. By setting a positioning protrusion on the top of the rotating seat and a matching limiting sleeve groove on the bottom of the centrifuge tank, a snap-fit ​​structure for circumferential transmission and axial positioning is formed. At the same time, an automatic locking mechanism consisting of a wedge-shaped locking block and a first elastic element is configured between the fixed sleeve and the rotating sleeve on the upper part of the centrifuge tank. During installation, the centrifuge tank only needs to be pressed down vertically to complete the double locking of the upper and lower parts under the guidance of the inclined surface and the elastic reset. During disassembly, it can be automatically unlocked by pulling upward. The whole process does not require the use of any tools, which greatly shortens the equipment downtime and significantly improves the efficiency of cleaning, replacement and daily maintenance.

[0013] 2. By setting an automatic cleaning assembly consisting of a guide rod, a slider, a second elastic element and a ring cleaning brush inside the processing box, when the centrifuge tank is disassembled upwards, its outer wall slides relative to the pre-compressed ring cleaning brush, and the brush bristles can effectively scrape off the residual slurry and fiber impurities attached to its surface, achieving dynamic synchronous cleaning. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the support frame, servo motor, and centrifuge tank of this utility model.

[0016] Figure 3 This is a three-dimensional sectional view of the processing box, rotating seat, and limiting sleeve of this utility model.

[0017] Figure 4 This is a three-dimensional sectional view of the rotating sleeve, fixing plate, and sliding rod components of this utility model.

[0018] Figure 5 This is a three-dimensional cross-sectional view of the guide rod, slider, and annular cleaning brush components of this utility model.

[0019] Figure 6 This is a three-dimensional sectional view of the protective shell, U-shaped limiting plate, and collection box of this utility model.

[0020] The labels in the diagram are as follows: 1: Support frame, 2: Processing box, 3: Rotating seat, 4: Servo motor, 5: Centrifuge tank, 6: Limiting sleeve, 7: Rotating sleeve, 8: Fixing plate, 9: Slide rod, 10: Wedge-shaped block, 11: First elastic element, 12: Fixing sleeve, 13: Guide rod, 14: Slider, 15: Annular cleaning brush, 16: Second elastic element, 17: Protective cover, 18: Protective shell, 19: U-shaped limiting plate, 20: Collection box. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6A centrifugal mechanism for preparing tissue paper includes a support frame 1, a processing box 2 mounted on the top of the support frame 1, and symmetrical discharge ports on the left and right sides of the lower part of the processing box 2. A rotating seat 3 is rotatably mounted inside the bottom of the processing box 2, and a positioning protrusion is provided on the top of the rotating seat 3. A servo motor 4 is mounted on the bottom outside the processing box 2, and the output shaft of the servo motor 4 vertically extends upward through the bottom of the processing box 2 and is fixedly connected to the rotating seat 3 to achieve power transmission. A centrifugal drum 5 is detachably mounted on the rotating seat 3 by a snap-fit ​​connection. A limit sleeve 6 is provided at the bottom of the centrifugal drum 5, and a corresponding positioning protrusion is provided at the bottom of the limit sleeve 6. The protrusions and grooves match to form a circumferentially limiting and axially positioning interlocking connection, ensuring reliable power transmission while facilitating quick assembly and disassembly. A rotating sleeve 7 is fitted onto the upper end of the centrifuge tank 5. An annular guide rail structure is provided on the top of the processing box 2. This annular guide rail structure slides with the rotating sleeve 7, providing radial support and guidance for the upper end of the centrifuge tank 5, preventing swaying or vibration during high-speed rotation. Fixed plates 8 are symmetrically fixed to the left and right sides of the rotating sleeve 7. A sliding rod 9 is slidably mounted on the fixed plate 8. A wedge-shaped locking block 10 is fixed to one end of the sliding rod 9 facing the centrifuge tank 5. The wedge-shaped locking block 10 has symmetrically inclined surfaces. The centrifuge tank 5 has a double-sided wedge design for easy installation and automatic locking. A first elastic element 11 is fitted onto the sliding rod 9. The left and right ends of the first elastic element 11 are fixedly connected to the fixing plate 8 and the wedge-shaped locking block 10, respectively, providing an inward restoring force for the wedge-shaped locking block 10. A fixing sleeve 12 is fixedly installed on the upper end of the centrifuge tank 5. The fixing sleeve 12 has symmetrically opened grooves on its left and right sides that match the wedge-shaped locking block 10, used to accommodate and lock the wedge-shaped locking block 10 after installation, thereby achieving axial constraint on the upper end of the centrifuge tank 5 and forming a double-positioning structure. A protective cover 17 is provided on the top of the centrifuge tank 5 to seal the opening. To prevent slurry splashing during high-speed rotation and improve operational safety, a protective shell 18 is provided on the bottom of the processing box 2. The protective shell 18 covers the outside of the servo motor 4 and serves to prevent dust, water, and mechanical protection, extending the service life of the drive components. Collection boxes 20 are installed on both the left and right sides of the support frame 1. The collection boxes 20 are located directly below the discharge port and are used to receive and collect qualified fine slurry flowing out after centrifugal separation. U-shaped limiting plates 19 are provided on both the left and right sides of the support frame 1. The U-shaped limiting plates 19 are located on one side of the collection box 20 and are used to laterally limit the collection box 20 to prevent it from shifting during material receiving.

[0023] When this device is in operation, the centrifuge bucket 5 is first vertically inserted into the processing box 2 from top to bottom. During the downward pressing process, the lower edge of the fixing sleeve 12 contacts the upper inclined surface of the wedge-shaped locking block 10. As it continues to fall, the inclined surface generates a guiding and squeezing effect, forcing the wedge-shaped locking block 10 to overcome the elastic force of the first elastic element 11 and slide outward, achieving radial displacement. At the same time, the sliding rod 9 moves linearly on the fixing plate 8, and the first elastic element 11 is compressed and stores energy. When the centrifuge bucket 5 has completely fallen to the predetermined position, the bottom limiting sleeve 6 and the rotating seat 3 complete the locking engagement, that is, the positioning protrusion is embedded in the groove structure, achieving circumferential fixation and axial positioning. At the same time, the slot on the fixing sleeve 12 is aligned with the wedge-shaped locking blocks 10 on both sides. Under the action of the first elastic element 11 releasing the stored energy, the wedge-shaped locking blocks 10 automatically reset inward and lock into the corresponding slots, completing the upper locking. Thus, the centrifuge bucket 5 achieves stable installation at both ends and has anti-vibration and anti-torsion capabilities. Suitable for high-speed centrifugation, the pulp raw material to be processed is then put into the centrifuge drum 5, the protective cover 17 is closed, and the servo motor 4 is started. The servo motor 4 drives the rotating seat 3 to rotate through the output shaft, thereby driving the centrifuge drum 5 to rotate at high speed. The rotating sleeve 7 and the ring guide rail structure work together to help maintain the rotational accuracy of the upper end of the centrifuge drum 5. Under the action of centrifugal force, the effective fibers with smaller particle size, i.e., fine pulp, are thrown out through the screen holes on the side wall of the centrifuge drum 5 and discharged through the discharge ports on both sides of the processing box 2, and fall into the corresponding collection box 20 below for centralized recycling. The larger particles of coarse fiber, impurities, and undispersed matter, i.e. coarse residue, cannot pass through the screen holes due to their large mass and significant inertia, and remain inside the centrifuge drum 5, thus achieving effective classification and separation of fiber components. After the operation is completed, when the centrifuge drum 5 needs to be cleaned or replaced, the operator only needs to apply an upward pulling force to the centrifuge drum 5 to make it start to detach from the rotating seat 3. During this process, the side wall of the slot of the fixed sleeve 12 presses the inclined surface of the wedge-shaped block 10 again, forcing it to slide outward along the slide rod 9 and release the locking state. When the block is completely removed from the slot, the entire centrifuge tank 5 can be taken out of the processing box 2 to complete the quick disassembly. After cleaning or maintenance, it can be reinstalled in the same way to achieve efficient and convenient maintenance operations.

[0024] Example 2: Based on Example 1, please refer to... Figure 4 The processing box 2 has four guide rods 13 arranged in a rectangle fixed inside. Each guide rod 13 has a slider 14 slidably mounted on it. The sliders 14 are all fixedly connected to an annular cleaning brush 15. The annular cleaning brush 15 is sleeved on the outside of the centrifuge tank 5. Each guide rod 13 has a second elastic element 16 mounted on it. The upper and lower ends of the second elastic element 16 are fixedly connected to the processing box 2 and the slider 14, respectively. The second elastic element 16 is a compression spring, which is used to apply a continuous downward pre-tightening force to the annular cleaning brush 15.

[0025] When the centrifugation operation is completed and the centrifuge tank 5 needs to be disassembled and cleaned, the operator pulls the centrifuge tank 5 upward. During this process, the outer wall of the centrifuge tank 5 slides relative to the annular cleaning brush 15 which is in a pre-pressurized state. The brush bristles wipe and scrape the surface of the tank in a circumferential manner, automatically removing the wet fiber residue, flocculent matter and some dry scale layer adhering to it, realizing the online dynamic self-cleaning function. Furthermore, due to the constant downward pressure provided by the second elastic element 16, it is ensured that the annular cleaning brush 15 maintains effective contact with the outer wall of the centrifuge tank 5 throughout the entire lifting stroke, avoiding cleaning failure due to excessive gap.

[0026] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A centrifugal mechanism for preparing tissue paper, comprising a support frame (1), a processing box (2) mounted on the top of the support frame (1), discharge ports symmetrically opened on both sides of the lower part of the processing box (2), a rotating seat (3) rotatably arranged inside the bottom of the processing box (2), a positioning protrusion provided on the top of the rotating seat (3), a servo motor (4) mounted on the bottom outside the processing box (2), the output shaft of the servo motor (4) vertically upward penetrating through the bottom of the processing box (2) and fixedly connected to the rotating seat (3) to realize power transmission, and a centrifugal drum (5) detachably arranged on the rotating seat (3) by snap-fit, characterized in that, The centrifuge barrel (5) is provided with a limiting sleeve (6) at the bottom. The limiting sleeve (6) is provided with a groove structure that matches the positioning protrusion. The centrifuge barrel (5) is provided with a rotating sleeve (7) at the top. The processing box (2) is provided with an annular guide rail structure at the top. The annular guide rail structure is slidably engaged with the rotating sleeve (7). The rotating sleeve (7) is symmetrically fixed with a fixing plate (8) on both sides. The fixing plate (8) is slidably provided with a slide rod (9). The slide rod (9) is fixed with a wedge-shaped card block (10) at one end facing the centrifuge barrel (5). The slide rod (9) is provided with a first elastic element (11). The two ends of the first elastic element (11) are fixedly connected to the fixing plate (8) and the wedge-shaped card block (10) respectively. The centrifuge barrel (5) is fixedly installed with a fixing sleeve (12). The fixing sleeve (12) is symmetrically provided with slots that match the wedge-shaped card block (10) on both sides.

2. The centrifugal mechanism for preparing tissue paper according to claim 1, characterized in that, The processing box (2) has multiple guide rods (13) fixed inside. Each guide rod (13) has a slider (14) slidably mounted on it. The sliders (14) are all fixedly mounted with an annular cleaning brush (15). The annular cleaning brush (15) is sleeved on the outside of the centrifuge tank (5). Each guide rod (13) is sleeved with a second elastic element (16). The two ends of the second elastic element (16) are fixedly connected to the processing box (2) and the slider (14) respectively.

3. The centrifugal mechanism for preparing tissue paper according to claim 2, characterized in that, The centrifuge tank (5) is covered with a protective cover (17) at the top.

4. The centrifugal mechanism for preparing tissue paper according to claim 3, characterized in that, The bottom of the processing box (2) is provided with a protective shell (18), which covers the outside of the servo motor (4).

5. The centrifugal mechanism for preparing tissue paper according to claim 4, characterized in that, The support frame (1) is equipped with collection boxes (20) on both sides, and the collection boxes (20) are located directly below the discharge port.

6. The centrifugal mechanism for preparing tissue paper according to claim 5, characterized in that, The support frame (1) is provided with U-shaped limiting plates (19) on both sides, and the U-shaped limiting plates (19) are located on one side of the collection box (20).

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