A screen centrifuge with easy cleaning

Abstract

The utility model discloses a convenient to clean's net front centrifugal screen, including base, the base is fixed with the box, the inside rotation of box is equipped with centrifugal cylinder, the upper end opening of box is equipped with the filter box for carrying out the filtration to the paper pulp to the top of box, the filter box is equipped with the funnel shape's feeding opening of penetration, be equipped with the filter mechanism in the feeding opening, the filter mechanism includes the filter screen of detachable setting in the feeding opening, compared with prior art, the utility model has the beneficial effects that: the utility model discloses a convenient to clean's net front centrifugal screen through design detachable filter screen and lifting mechanism cooperation, effectively avoided the paper pulp waste and greatly simplified the cleaning process of centrifugal cylinder and screen cloth, and the design of the crushing knife and the scraper is combined, not only improves the filtration effect of the paper pulp, but also prevents the filter screen from being blocked, the overall optimization paper pulp processing efficiency and quality, reduces the maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of paper processing technology, specifically to a pre-screen centrifugal sieve that is easy to clean. Background Technology

[0002] In the processing and production of specialty papers (such as those used for firecracker packaging and fruit bagging), the pulp treatment stage is crucial. Before being fed into the wire mesh, the pulp needs to be screened and undergo preliminary dewatering to ensure the final paper quality. The paper wire mesh, as a key medium for paper web formation and dewatering, plays a central role in the process of forming a wet paper sheet. Before the pulp is fed into the wire mesh, methods such as centrifugal filtration are typically used to remove coarse fibers and other impurities, thereby improving pulp quality and laying a good foundation for subsequent paper forming.

[0003] In the prior art, such as the centrifugal sieve for paper screening disclosed in Chinese Utility Model Patent No. CN210085922U, the structure includes a box body, a screen inside the box body, and a hollow rotating shaft horizontally arranged inside the screen. One end of the rotating shaft extends to the outside of the box body and is connected to the motor actuation shaft, while the other end is connected to the feed pipe and rotatably connected to the feed pipe. Several pulp outlet holes are provided on the rotating shaft inside the box body, and several impurity outlet holes are provided on the rotating shaft connected to the motor actuation shaft on the outside of the box body. An impurity box is fitted onto this part of the rotating shaft, and one side of the impurity box is connected to the box body. A good pulp pipe is provided at the bottom of the box body, and an impurity outlet pipe is provided at the bottom of the impurity box. The rotating shaft is rotatably connected to the box body, the screen, and the impurity box, respectively. Furthermore, several cutters are evenly spaced on the rotating shaft, and a cleaning brush is provided between adjacent cutters. This design aims to effectively break up the pulp and improve pulp screening efficiency and output.

[0004] However, in practical applications, this existing technology has at least the following drawbacks:

[0005] Taking specialty paper for firecracker packaging as an example, firecracker packaging has high requirements for paper strength and uniformity, and the quality of the pulp directly affects the final packaging effect. However, when the centrifugal screen is working, after the pulp enters through one end of the hollow rotating shaft, the good pulp should enter the screen through the pulp outlet on the side of the rotating shaft and be further processed by the rotation of the cutter head inside the screen. However, due to structural design problems, the pulp can easily be discharged directly through the impurity outlet at the other end of the rotating shaft, resulting in a large amount of good pulp not entering the screen through the pulp outlet on the side of the rotating shaft as expected, causing pulp waste.

[0006] The screen is located inside the box, making it inconvenient to disassemble and clean after use. Utility Model Content

[0007] The purpose of this invention is to propose a pre-screen centrifugal screen that is easy to clean, so as to solve the defects of existing centrifugal screens, such as pulp waste and inconvenient screen cleaning.

[0008] This utility model provides the following technical solution: a pre-screen centrifugal sieve that is easy to clean, including a base, a box body fixed on the base, and a centrifugal cylinder rotatably arranged inside the box body;

[0009] The upper end of the box is open, and a filter box for filtering pulp is provided above the box. The filter box is provided with a funnel-shaped feeding port. A filtering mechanism is provided inside the feeding port. The filtering mechanism includes a filter screen that can be detachably installed inside the feeding port.

[0010] A connecting ring is fixed at the bottom of the filter box, and a lifting mechanism is connected between the filter box and the base. When the lifting mechanism moves the filter box downward, it puts the connecting ring on the outside of the opening of the centrifuge cylinder.

[0011] Preferably, the opening of the feeding port is fixed with a fixing plate by bolts, and the two sides of the fixing plate are fixed to the two sides of the filter screen by two connecting rods.

[0012] Preferably, a first motor is fixed to the fixing plate, a rotating rod is fixed to the output shaft of the first motor, and a scraper for moving on the surface of the filter screen is fixed to the side of the rotating rod.

[0013] Preferably, the lower end of the rotating rod passes through the filter screen, and a pulverizing blade is fixed to the lower side of the rotating rod. When the lifting mechanism drives the filter box to move downward, the pulverizing blade enters the interior of the centrifuge cylinder.

[0014] Preferably, a second motor is fixed to the lower end of the casing, and a transmission rod is fixed to the output shaft of the second motor via a coupling. The upper end of the transmission rod is provided with a transmission groove, and a transmission shaft is fixed to the lower end of the centrifuge cylinder. The lower end of the transmission shaft is slidably inserted into the transmission groove.

[0015] Preferably, a limiting ring is fixed to the side of the centrifuge cylinder, and a support ring for supporting the limiting ring is fixed to the inner wall of the box body, with the lower end face of the connecting ring in close contact with the upper surface of the limiting ring.

[0016] Preferably, a sealing ring is fixed to the upper end of the housing.

[0017] Preferably, the lifting mechanism includes a telescopic cylinder fixed between the filter box and the base.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an easy-to-clean pre-screen centrifuge screen. By designing a detachable filter screen and a lifting mechanism, it effectively avoids pulp waste and greatly simplifies the cleaning process of the centrifuge drum and screen. At the same time, combined with the design of the pulverizing blade and scraper, it not only improves the pulp filtration effect but also prevents the filter screen from clogging. Overall, it optimizes the pulp processing efficiency and quality and reduces maintenance costs. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0020] Figure 2 This is another cross-sectional structural diagram of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0022] In the diagram: 1. Scraper; 2. Filter screen; 3. Crusher; 4. Limiting ring; 5. Support ring; 6. Centrifuge cylinder; 7. First motor; 8. Rotating rod; 9. Bolt; 10. Filter box; 11. Connecting ring; 12. Telescopic cylinder; 13. Sealing ring; 14. Lifting mechanism; 15. Box body; 16. Base; 17. Second motor; 18. Drive shaft; 19. Drive rod; 20. Fixing plate; 21. Feed port. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-3 This utility model discloses a pre-screen centrifugal screen that is easy to clean, including a base 16, a box 15 fixed on the base 16, and a centrifugal cylinder 6 rotatably installed inside the box 15. The centrifugal cylinder 6 is used for centrifugal filtration of pulp.

[0025] The upper end of the box 15 is open, and a filter box 10 for preliminary filtration of pulp is provided above the box 15. Specifically, the filter box 10 is provided with a funnel-shaped feeding port 21, and a filtration mechanism is provided inside the feeding port 21. The filtration mechanism includes a filter screen 2 that is detachably installed inside the feeding port 21.

[0026] Furthermore, a connecting ring 11 is fixed at the bottom of the filter box 10, and a lifting mechanism 14 is connected between the filter box 10 and the base 16. When the lifting mechanism 14 moves the filter box 10 downward, the connecting ring 11 is sleeved on the outside of the opening of the centrifuge cylinder 6.

[0027] With the above structure, when in use, the pulp is poured into the filter box 10 through the feed port 21, and the coarse fibers in the pulp are filtered out by the filter screen 2. The filtered pulp enters the centrifuge drum 6 from the top. The rotation of the centrifuge drum 6 drives the pulp to rotate and generate centrifugal force, thereby achieving secondary filtration of the pulp. When cleaning is required, the filter screen 2 can be removed from the feed port 21 for cleaning, and the filter box 15 can be moved upward by the lifting mechanism 14 to fully expose the upper end of the box 15, thereby facilitating the cleaning of the centrifuge drum 6.

[0028] In some embodiments, the opening of the feed port 21 is fixed with a fixing plate 20 by bolts 9. The two sides of the fixing plate 20 are fixed to the two sides of the filter screen 2 by two connecting rods. The fixing plate 20 can be removed by unscrewing the bolts 9, making it convenient to remove the filter screen 2 from the filter box 10.

[0029] Furthermore, a first motor 7 is fixed to the fixed plate 20, and a rotating rod 8 is fixed to the output shaft of the first motor 7. A scraper 1 for moving on the surface of the filter screen 2 is fixed to the side of the rotating rod 8. When in use, the external connection of the first motor 7 is turned on, and the output shaft of the first motor 7 rotates, driving the rotating rod 8 to rotate. When the rotating rod 8 rotates, it drives the scraper 1 to move on the surface of the filter screen 2, preventing the filter screen 2 from becoming clogged.

[0030] Furthermore, the lower end of the rotating rod 8 passes through the filter screen 2, and a shredder 3 is fixed to the side of the lower end of the rotating rod 8. When the lifting mechanism 14 drives the filter box 10 to move downward, the shredder 3 enters the interior of the centrifuge cylinder 6. During the filtration process, the first motor 7 drives the rotating rod 8 to rotate slowly, while the centrifuge cylinder 6 is in a high-speed rotation state, so that the pulp collides with the blade of the shredder 3 when rotating at high speed, thereby further shredding the pulp.

[0031] The diameter of the crushing blade 3 is smaller than the diameter of the lower end of the feeding port 21, so that when the fixing plate 20 is disassembled, the crushing blade 3 can be separated from the centrifuge cylinder 6 along with the rotating rod 8.

[0032] In some embodiments, to facilitate disassembly of the centrifuge cylinder 6, a second motor 17 is fixed to the lower end of the housing 15. The output shaft of the second motor 17 is fixed to a transmission rod 19 via a coupling. The upper end of the transmission rod 19 is provided with a transmission groove. A transmission shaft 18 is fixed to the lower end of the centrifuge cylinder 6. The lower end of the transmission shaft 18 is slidably inserted into the transmission groove. In use, the external power supply of the second motor 17 is turned on, and the rotation of the output shaft of the second motor 17 drives the transmission rod 19 to rotate. When the transmission rod 19 rotates, it drives the transmission shaft 18 to rotate. When the transmission shaft 18 rotates, it drives the centrifuge cylinder 6 to rotate. When disassembling the centrifuge cylinder 6, the transmission shaft 18 can be pulled out from the transmission groove by lifting the centrifuge cylinder 6 upwards.

[0033] A limiting ring 4 is fixed to the side of the centrifuge cylinder 6, and a support ring 5 for supporting the limiting ring 4 is fixed to the inner wall of the box body 15. The lower end face of the connecting ring 11 is in close contact with the upper surface of the limiting ring 4.

[0034] A sealing ring 13 is fixed to the upper end of the housing 15, and the sealing ring 13 is in close contact with the lower surface of the filter box 10.

[0035] In some embodiments, the lifting mechanism 14 includes a telescopic cylinder 12 fixed between the filter box 10 and the base 16.

[0036] In summary, this utility model aims to provide a pre-screen centrifugal screen that is easy to clean, solving the problems of pulp waste and inconvenient screen cleaning in existing centrifugal screens. Specifically, by setting a detachable filter screen 2 and a lifting mechanism 14 above the box 15, preliminary filtration of pulp and convenient cleaning of the centrifuge cylinder 6 are achieved. At the same time, the pulverizing blade 3 and scraper 1 are used to improve the filtration effect and prevent clogging, thereby optimizing the pulp processing flow and improving the quality and efficiency of paper production.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-screen centrifugal sieve that is easy to clean, characterized in that: Includes a base (16), on which a box (15) is fixed, and a centrifuge cylinder (6) is rotatably installed inside the box (15); The upper end of the box (15) is open, and a filter box (10) for filtering pulp is provided above the box (15). The filter box (10) is provided with a funnel-shaped feeding port (21). A filtering mechanism is provided inside the feeding port (21). The filtering mechanism includes a filter screen (2) that can be detachably installed inside the feeding port (21). The bottom of the filter box (10) is fixed with a connecting ring (11), and a lifting mechanism (14) is connected between the filter box (10) and the base (16). When the lifting mechanism (14) moves the filter box (10) downward, the connecting ring (11) is sleeved on the outside of the opening of the centrifuge cylinder (6).

2. The pre-screen centrifugal sieve for easy cleaning as described in claim 1, characterized in that: The opening of the feeding port (21) is fixed with a fixing plate (20) by bolts (9), and the two sides of the fixing plate (20) are fixed to the two sides of the filter screen (2) by two connecting rods.

3. The pre-screen centrifuge as described in claim 2, characterized in that: The fixing plate (20) is fixed with a first motor (7), the output shaft of the first motor (7) is fixed with a rotating rod (8), and the side of the rotating rod (8) is fixed with a scraper (1) for moving on the surface of the filter screen (2).

4. The pre-screen centrifuge as described in claim 3, characterized in that: The lower end of the rotating rod (8) passes through the filter screen (2), and a crushing blade (3) is fixed on the lower side of the rotating rod (8). When the lifting mechanism (14) drives the filter box (10) to move downward, the crushing blade (3) enters the interior of the centrifuge cylinder (6).

5. A pre-screen centrifugal sieve for easy cleaning as described in claim 1, characterized in that: The lower end of the housing (15) is fixed with a second motor (17), and the output shaft of the second motor (17) is fixed with a transmission rod (19) through a coupling. The upper end of the transmission rod (19) is provided with a transmission groove, and the lower end of the centrifuge (6) is fixed with a transmission shaft (18). The lower end of the transmission shaft (18) is slidably inserted into the transmission groove.

6. A pre-screen centrifuge screen for easy cleaning as described in claim 5, characterized in that: A limiting ring (4) is fixed to the side of the centrifuge tube (6), and a support ring (5) for supporting the limiting ring (4) is fixed to the inner wall of the box (15). The lower end face of the connecting ring (11) is in close contact with the upper surface of the limiting ring (4).

7. A pre-screen centrifugal sieve for easy cleaning as described in claim 1, characterized in that: A sealing ring (13) is fixed to the upper end of the box (15).

8. A pre-screen centrifugal sieve for easy cleaning as described in claim 1, characterized in that: The lifting mechanism (14) includes a telescopic cylinder (12) fixed between the filter box (10) and the base (16).

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