Screening device convenient for paper pulping and grading

Abstract

The utility model provides a screening device convenient for paper pulping grading, which comprises a first screening drum and a second screening drum which are detachably arranged in a liquid storage drum, the first screening drum is arranged on the outer side of the second screening drum, a driving plate is arranged in the middle of the liquid storage drum, and a plurality of liquid pushing plates and slag scraping plates are uniformly arranged on the driving plate. The liquid pushing plate is used for improving the slurry screening efficiency, and the slag scraping plate is used for guaranteeing the relative cleanness of the side walls of the first screen drum and the second screen drum. The slurry screening device is ingenious in design and convenient to use, the slurry screening efficiency is greatly improved, and good economic benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking tools, in particular to a screening device which is convenient for paper pulping and classification. Background Art

[0002] During the papermaking process, the fibers in the raw materials are crushed and ground into a slurry. This slurry is then screened and filtered to ensure the smoothness and quality of the paper produced. Therefore, the effectiveness and stability of the screening process during the pulping process directly determine the quality of the paper. Traditional screening using a single screen has low screening efficiency and is easily clogged by impurities, making it inconvenient to use.

[0003] Chinese patent document CN 221480407 U describes a paper pulping screening device that uses single-stage screening and has low screening efficiency; Chinese patent document CN 209292768 U describes a paper pulping coarse screening device that also uses single-stage screening and is unable to effectively clean slag on both sides of the screen. There are defects in its use and it needs to be improved. Utility Model Content

[0004] The utility model provides a screening device which is convenient for paper pulping and grading, and solves the problems of low pulp screening efficiency and easy clogging of the screen.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a screening device that is convenient for paper pulping and grading, comprising a first screen cylinder and a second screen cylinder that are detachably arranged in a liquid storage cylinder, the first screen cylinder being arranged on the outside of the second screen cylinder, a driving plate being provided in the middle of the liquid storage cylinder, and a plurality of liquid pushing plates and scraping plates being evenly arranged on the driving plate, the liquid pushing plates being used to improve the screening efficiency of the slurry, and the scraping plates being used to ensure the relative cleanliness of the side walls of the first screen cylinder and the second screen cylinder.

[0006] In a preferred solution, a plurality of first sieve holes and a plurality of second sieve holes are respectively provided through the side walls of the first sieve cylinder and the second sieve cylinder, and the diameter of the first sieve holes is smaller than the diameter of the second sieve holes.

[0007] In the preferred embodiment, a first mounting hole is provided in the middle of the inner side of the liquid storage cylinder, a shaft is provided at the bottom of the driving plate, the shaft is connected to the motor, the motor is arranged on the lower side of the liquid storage cylinder, the motor includes an output shaft, and the output shaft is passed through the first mounting hole.

[0008] In the preferred solution, a first annular groove and a second annular groove are provided on the outside of the first mounting hole, and a plurality of bayonet holes are evenly distributed on the first annular groove and the second annular groove respectively. A first retaining ring and a second retaining ring are provided on the upper and lower sides of the first sieve cylinder and the second sieve cylinder respectively, and the first retaining ring and the second retaining ring are respectively plugged into the first annular groove and the second annular groove.

[0009] In the preferred solution, a plurality of first protrusions and a second protrusion are evenly distributed on the first retaining ring and the second retaining ring located on the lower side, and the first protrusion and the second protrusion are respectively engaged with the bayonet. A plurality of second mounting holes are also provided on one side of the first mounting hole, and the liquid outlet pipe is inserted into the second mounting hole. A plurality of support legs are also provided at the bottom of the liquid storage cylinder.

[0010] In the preferred solution, the driving plate includes a first disc, and a plurality of first straight plates are symmetrically arranged on the outside of the first disc. The liquid pushing plate and the scraping plate are respectively detachably arranged on the first straight plates. A square hole is provided in the middle of the output shaft, and a square head is provided at the bottom of the shaft rod, which is inserted into the square hole.

[0011] In the preferred solution, the first straight plate is pressed onto the first sieve cylinder and the second sieve cylinder, the tops of the first sieve cylinder and the second sieve cylinder are at the same height, and a plurality of arc plates are provided on the upper side of the liquid storage cylinder, with gaps provided between two adjacent arc plates, and the spacing between the gaps is greater than the width of the first straight plate.

[0012] In the preferred solution, a circular ring is provided on the lower side of the shaft, an external thread is provided on the outer side of the output shaft, a locking sleeve is provided on the shaft, a threaded hole is provided in the middle of the locking sleeve, a limiting ring is provided on the top of the locking sleeve, the limiting ring is provided on the shaft, and the locking sleeve and the output shaft are threadedly connected.

[0013] In the preferred solution, a docking sleeve is provided on the top of the first disc, a mounting ring plate is provided on the top of the liquid storage cylinder, a plurality of third mounting holes are penetrated on the mounting ring plate, the mounting ring plate is connected to the locking frame by screws, the locking frame includes a second disc, a plurality of second straight plates are provided on the outside of the second disc, a mounting plate is provided on the end of the second straight plate, a second through hole is penetrated on the mounting plate, screws are passed through the second through hole and the third mounting hole, a push rod is provided at the bottom of the second disc, and the push rod is plugged into the docking sleeve.

[0014] In the preferred solution, the structures of the liquid pushing plate and the scraping plate are the same. The structures of the liquid pushing plate and the scraping plate are: including a top plate and a gasket arranged on the top, a column is provided in the middle of the gasket, a plurality of first through holes are provided on the first straight plate, and the columns are passed through. The columns are fixed to the first straight plate through the first through holes by nuts. Wear-resistant layers are also provided on both sides of the scraping plate, and the two sides of the scraping plate respectively abut against the side walls of the first screen cylinder and\or the second screen cylinder.

[0015] The beneficial effects of the utility model are as follows: by installing the first sieve drum and the second sieve drum inside the liquid storage drum, the slurry can be subjected to multi-stage filtration; the bottom of the liquid storage drum is connected to the driving plate through a motor; the driving plate is provided with a liquid pushing plate and a scraping plate; while ensuring the efficiency of slurry screening, the surfaces of the first sieve drum and the second sieve drum can be kept relatively clean at all times, and impurities that may be covered on the surface can be scraped off, thereby ensuring production efficiency; the screened slurry is discharged through the liquid outlet pipe; it is easy to use and has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is the overall structural diagram of the utility model in state 1;

[0018] Figure 2 yes Figure 1 Schematic top view of

[0019] Figure 3 This is the overall structural diagram of the utility model in state 2;

[0020] Figure 4 yes Figure 1 Schematic diagram of the explosion structure state 1;

[0021] Figure 5 yes Figure 1 Schematic diagram of the explosion structure in state 2;

[0022] Figure 6 This is a schematic diagram of the internal structure of the screen and drive plate of the utility model Figure 1 ;

[0023] Figure 7 This is a schematic diagram of the internal structure of the screen and drive plate of the utility model Figure 2 ;

[0024] Figure 8 This is a schematic diagram of the internal structure of the driving plate, liquid pushing plate and scraping plate of the utility model;

[0025] Figure 9 yes Figure 8 A magnified schematic diagram of point A;

[0026] Figure 10 It is a schematic structural diagram of the liquid storage cylinder of the present utility model.

[0027] In the figure: liquid storage cylinder 1; first mounting hole 101; second mounting hole 102; first annular groove 103; second annular groove 104; bayonet 105; arc plate 106; notch 107; mounting ring plate 108; third mounting hole 109; support leg 110; first sieve drum 2; first sieve hole 201; first retaining ring 202; first protrusion 203; second sieve drum 3; second sieve hole 301; second retaining ring 302; second protrusion 303; drive plate 4; first disc 401; first straight plate 402; First through hole 403; shaft 404; square head 405; docking sleeve 406; circular ring 407; locking sleeve 408; threaded hole 409; limiting ring 410; liquid pushing plate 5; scraper plate 6; locking frame 7; second circular disc 701; second straight plate 702; mounting plate 703; second through hole 704; push rod 705; motor 8; output shaft 801; square hole 802; external thread 803; liquid outlet pipe 9; screw 10; top plate 11; washer 12; column 13; nut 14; wear-resistant layer 15. DETAILED DESCRIPTION

[0028] like Figure 1-3 A screening device for facilitating paper pulping and grading is disclosed, comprising a first screen cylinder 2 and a second screen cylinder 3 detachably arranged in a liquid storage cylinder 1, the first screen cylinder 2 being arranged on the outside of the second screen cylinder 3, a driving plate 4 being provided in the middle of the liquid storage cylinder 1, a plurality of liquid pushing plates 5 and scraping plates 6 being evenly arranged on the driving plate 4, the liquid pushing plates 5 being used to improve the screening efficiency of the slurry, and the scraping plates 6 being used to ensure the relative cleanliness of the side walls of the first screen cylinder 2 and the second screen cylinder 3.

[0029] The use of multi-stage screening ensures the screening efficiency of the pulp and improves the screening speed. Driven by the motor 8, the liquid pushing plate 5 pushes the slurry to a position away from the center of the liquid storage cylinder 1 through the action of centrifugal force, forcing the slurry to pass through the first screen cylinder 2 and the second screen cylinder 3 in sequence, thereby realizing the screening process. At the same time, since there may be more impurities in the slurry, the upper screening holes will be covered or even blocked when it passes through the first screen cylinder 2 and the second screen cylinder 3. The scraper plate 6 is attached to the side walls of the first screen cylinder 2 and the second screen cylinder 3. Therefore, in the process of pushing the slurry to be discharged and move away from the center, the side walls of the first screen cylinder 2 and the second screen cylinder 3 can be cleaned in time, thereby increasing the screening area and ensuring the screening quality.

[0030] In a preferred solution, a plurality of first sieve holes 201 and second sieve holes 301 are respectively penetrated through the side walls of the first sieve drum 2 and the second sieve drum 3 , and the diameter of the first sieve holes 201 is smaller than that of the second sieve holes 301 .

[0031] The slurry is filtered from the inside to the outside of the liquid storage cylinder 1, completing the coarse filtration screening to the fine filtration screening, thereby improving the efficiency and quality of the screening, and ensuring a stable screening flow rate and good effect.

[0032] like Figure 4-5 In the preferred embodiment, a first mounting hole 101 is provided in the middle of the inner side of the liquid storage cylinder 1, and a shaft rod 404 is provided at the bottom of the driving plate 4. The shaft rod 404 is connected to the motor 8. The motor 8 is arranged on the lower side of the liquid storage cylinder 1, and the motor 8 includes an output shaft 801, which is passed through the first mounting hole 101.

[0033] Motor 8 rotates shaft 404, thereby driving push plate 5 to push the fluid. At the same time, scraper plate 6 cleans the sidewalls of first sieve drum 2 and second sieve drum 3, respectively, ensuring that first sieve holes 201 and second sieve holes 301 are as open as possible, ensuring stable passage of slurry. A sealing ring is provided on the outside of output shaft 801 to prevent slurry from being directly discharged from storage drum 1 through the gap between first mounting hole 101 and output shaft 801, resulting in slurry loss.

[0034] In the preferred solution, a first annular groove 103 and a second annular groove 104 are provided on the outer side of the first mounting hole 101, and a plurality of bayonet holes 105 are evenly distributed on the first annular groove 103 and the second annular groove 104 respectively. A first retaining ring 202 and a second retaining ring 302 are provided on the upper side and the lower side of the first sieve drum 2 and the second sieve drum 3 respectively, and the first retaining ring 202 and the second retaining ring 302 are respectively plugged into the first annular groove 103 and the second annular groove 104.

[0035] The stability of the first sieve drum 2 and the second sieve drum 3 during operation is improved, while the convenience of installation of the first sieve drum 2 and the second sieve drum 3 is ensured, and the plug-in method is used to facilitate subsequent maintenance.

[0036] like Figure 6-7 In the preferred embodiment, a plurality of first protrusions 203 and a second protrusion 303 are evenly distributed on the first retaining ring 202 and the second retaining ring 302 located on the lower side, and the first protrusions 203 and the second protrusions 303 are respectively engaged with the bayonet 105. A plurality of second mounting holes 102 are also provided on one side of the first mounting hole 101, and the liquid outlet pipe 9 is inserted into the second mounting hole 102. A plurality of supporting legs 110 are also provided at the bottom of the liquid storage cylinder 1.

[0037] The installation positions of the first sieve drum 2 and the second sieve drum 3 are further locked by the first protrusion 203 and the second protrusion 303, thereby avoiding the problem that the driving plate 4 may drive the first sieve drum 2 and the second sieve drum 3 to move during rotation. At the same time, the repeated installation has high precision and good effect. The bottom support leg 110 adopts a threaded connection method and can be adjusted according to the height difference of the ground, which is easy to use.

[0038] like Figure 8In the preferred embodiment, the driving plate 4 includes a first disc 401, and a plurality of first straight plates 402 are symmetrically provided on the outside of the first disc 401. The liquid pushing plate 5 and the scraping plate 6 are respectively detachably arranged on the first straight plate 402. A square hole 802 is provided in the middle of the output shaft 801, and a square head 405 is provided at the bottom of the shaft rod 404, and the square head 405 is inserted into the square hole 802.

[0039] The driving plate 4 is made of a lightweight and high-load-bearing material, which is waterproof and wear-resistant. Through the docking of the square head 405 and the square hole 802, the torque transmission is stable, the speed is stable, and the slurry screening effect is better. At the same time, the liquid pushing plate 5 and the scraping plate 6 can be installed and removed in time as needed, which is convenient for maintenance.

[0040] In the preferred embodiment, the first straight plate 402 is pressed onto the first sieve cylinder 2 and the second sieve cylinder 3, and the tops of the first sieve cylinder 2 and the second sieve cylinder 3 are at the same height. A plurality of arc plates 106 are also provided on the upper side of the liquid storage cylinder 1, and a gap 107 is provided between two adjacent arc plates 106, and the spacing between the gaps 107 is greater than the width of the first straight plate 402.

[0041] The notch 107 facilitates the installation of the first straight plate 402 from the top. At the same time, after the installation is completed, the arc plate 106 serves as a limit on the top to ensure that the overall posture is stable during the rotation of the drive plate 4. The first sieve drum 2 and the second sieve drum 3 also play a role in auxiliary support of the drive plate 4. The drive plate 4 is made of polytetrafluoroethylene with a low friction coefficient. During the contact between the first retaining ring 202 and the second retaining ring 302 at the top of the first sieve drum 2 and the second sieve drum 3, the friction is small, the service life is long, and the cost is controllable.

[0042] In the preferred embodiment, a circular ring 407 is further provided on the lower side of the shaft 404, an external thread 803 is provided on the outer side of the output shaft 801, a locking sleeve 408 is sleeved on the shaft 404, a threaded hole 409 is provided in the middle of the locking sleeve 408, a limiting ring 410 is provided on the top of the locking sleeve 408, the limiting ring 410 is sleeved on the shaft 404, and the locking sleeve 408 and the output shaft 801 are threadedly connected.

[0043] The shaft 404 and the output shaft 801 are further fixed by the locking sleeve 408, so that the torque transmission is more stable, the working efficiency is high, and the mechanical energy loss is small.

[0044] like Figure 10In the preferred embodiment, a docking sleeve 406 is provided on the top of the first disc 401, a mounting ring plate 108 is provided on the top of the liquid storage cylinder 1, a plurality of third mounting holes 109 are penetrated on the mounting ring plate 108, the mounting ring plate 108 is connected to the locking frame 7 by screws 10, and the locking frame 7 includes a second disc 701, a plurality of second straight plates 702 are provided on the outside of the second disc 701, a mounting plate 703 is provided on the end of the second straight plate 702, a second through hole 704 is penetrated on the mounting plate 703, the screw 10 is passed through the second through hole 704 and the third mounting hole 109, a push rod 705 is provided at the bottom of the second disc 701, and the push rod 705 is plugged into the docking sleeve 406.

[0045] The drive plate 4 is positioned and corrected again from the top, which reduces the problem of the shaft 404 of the drive plate 4 and the output shaft 801 of the motor 8 being out of axial stability due to inertia and long-term use, thereby affecting the overall slurry screening efficiency and even causing damage to the screening device. The shaft 404 has high rotation accuracy, which reduces the generation of noise and vibration.

[0046] like Figure 9 In the preferred embodiment, the structures of the liquid pushing plate 5 and the scraping plate 6 are the same. The structures of the liquid pushing plate 5 and the scraping plate 6 are: including a top plate 11 and a gasket 12 arranged on the top, a column 13 is provided in the middle of the gasket 12, and a plurality of first through holes 403 are provided on the first straight plate 402. The column 13 passes through the first through hole 403. The column 13 is fixed to the first straight plate 402 by a nut 14. A wear-resistant layer 15 is also provided on both sides of the scraping plate 6. The two sides of the scraping plate 6 respectively abut against the side walls of the first screen cylinder 2 and\or the second screen cylinder 3.

[0047] The quick-disassembly design can flexibly adjust the angles between the liquid pushing plate 5 and the scraping plate 6 relative to the first sieve drum 2 and the second sieve drum 3 according to the positions of the first sieve drum 2 and the second sieve drum 3, as well as the spacing between the first sieve drum 2 and the second sieve drum 3. The two sides of the liquid pushing plate 5 do not contact the side walls of the first sieve drum 2 and the second sieve drum 3, ensuring the overall push flow stability. The wear-resistant layers on both sides of the scraping plate 6 lightly contact the side walls of the first sieve drum 2 and the second sieve drum 3, resulting in a good slag cleaning effect.

[0048] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A screening device for facilitating paper pulping classification, characterized by: The invention comprises a first sieve drum (2) and a second sieve drum (3) which are detachably arranged in a liquid storage drum (1); the first sieve drum (2) is arranged outside the second sieve drum (3); a driving plate (4) is provided in the middle of the liquid storage drum (1); a plurality of liquid pushing plates (5) and scraping plates (6) are evenly arranged on the driving plate (4); the liquid pushing plates (5) are used to improve the screening efficiency of the slurry; and the scraping plates (6) are used to ensure that the side walls of the first sieve drum (2) and the second sieve drum (3) are relatively clean.

2. The screening device for facilitating paper pulping classification according to claim 1, characterized in that: A plurality of first sieve holes (201) and a plurality of second sieve holes (301) are respectively provided through the side walls of the first sieve cylinder (2) and the second sieve cylinder (3); the diameter of the first sieve holes (201) is smaller than the diameter of the second sieve holes (301).

3. The screening device for facilitating paper pulping classification according to claim 1, characterized in that: A first mounting hole (101) is provided in the middle of the inner side of the liquid storage cylinder (1), a shaft (404) is provided at the bottom of the driving plate (4), the shaft (404) is connected to the motor (8), the motor (8) is arranged on the lower side of the liquid storage cylinder (1), and the motor (8) includes an output shaft (801), which is inserted into the first mounting hole (101).

4. The screening device for facilitating paper pulping classification according to claim 3, characterized in that: A first annular groove (103) and a second annular groove (104) are provided on the outside of the first mounting hole (101), and a plurality of bayonet holes (105) are evenly distributed on the first annular groove (103) and the second annular groove (104). A first retaining ring (202) and a second retaining ring (302) are provided on the upper side and the lower side of the first sieve drum (2) and the second sieve drum (3), respectively. The first retaining ring (202) and the second retaining ring (302) are plugged into the first annular groove (103) and the second annular groove (104), respectively.

5. The screening device for facilitating paper pulping classification according to claim 4, characterized in that: A plurality of first protrusions (203) and a plurality of second protrusions (303) are evenly distributed on the first retaining ring (202) and the second retaining ring (302) located at the lower side. The first protrusions (203) and the second protrusions (303) are respectively engaged with the bayonet (105). A plurality of second mounting holes (102) are further provided on one side of the first mounting hole (101). The liquid outlet pipe (9) is inserted into the second mounting hole (102). A plurality of supporting legs (110) are further provided at the bottom of the liquid storage cylinder (1).

6. The screening device for facilitating paper pulping classification according to claim 3, characterized in that: The driving plate (4) includes a first disc (401), a plurality of first straight plates (402) are symmetrically arranged on the outside of the first disc (401), a liquid pushing plate (5) and a scraping plate (6) are detachably arranged on the first straight plates (402), a square hole (802) is provided in the middle of the output shaft (801), and a square head (405) is provided at the bottom of the shaft (404), and the square head (405) is inserted into the square hole (802).

7. The screening device for facilitating paper pulping classification according to claim 6, characterized in that: The first straight plate (402) is pressed onto the first sieve drum (2) and the second sieve drum (3), and the tops of the first sieve drum (2) and the second sieve drum (3) are at the same height. A plurality of arc plates (106) are further provided on the upper side of the liquid storage drum (1), and a notch (107) is provided between two adjacent arc plates (106). The spacing between the notches (107) is greater than the width of the first straight plate (402).

8. The screening device for facilitating paper pulping classification according to claim 6, characterized in that: A ring (407) is further provided on the lower side of the shaft (404), an external thread (803) is provided on the outer side of the output shaft (801), a locking sleeve (408) is sleeved on the shaft (404), a threaded hole (409) is provided in the middle of the locking sleeve (408), a limiting ring (410) is provided on the top of the locking sleeve (408), the limiting ring (410) is sleeved on the shaft (404), and the locking sleeve (408) and the output shaft (801) are threadedly connected.

9. The screening device for facilitating paper pulping classification according to claim 6, characterized in that: A docking sleeve (406) is provided on the top of the first disc (401), a mounting ring plate (108) is provided on the top of the liquid storage cylinder (1), a plurality of third mounting holes (109) are provided through the mounting ring plate (108), the mounting ring plate (108) is connected to the locking frame (7) by screws (10), the locking frame (7) comprises a second disc (701), a plurality of second straight plates (702) are provided on the outside of the second disc (701), a mounting plate (703) is provided at the end of the second straight plate (702), a second through hole (704) is provided through the mounting plate (703), the screw (10) is passed through the second through hole (704) and the third mounting hole (109), a top rod (705) is provided at the bottom of the second disc (701), and the top rod (705) and the docking sleeve (406) are plugged.

10. The screening device for facilitating paper pulping classification according to claim 6, characterized in that: The liquid pushing plate (5) and the scraping plate (6) have the same structure. The liquid pushing plate (5) and the scraping plate (6) have the following structures: they include a top plate (11) and a washer (12) arranged on the top, a column (13) is provided in the middle of the washer (12), a first straight plate (402) is provided with a plurality of first through holes (403), the columns (13) are passed through, and the columns (13) are fixed to the first straight plate (402) through the first through holes (403). Wear-resistant layers (15) are also provided on both sides of the scraping plate (6), and both sides of the scraping plate (6) respectively abut against the side walls of the first sieve cylinder (2) and / or the second sieve cylinder (3).

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