Anti-blocking paper pulp screening device

Abstract

The utility model discloses an anti-blocking paper pulp screening device which comprises a base, and a pressure screen shell is fixedly installed on the top of the base. When slurry blocks an interlayer between the screen cylinder and the rotor, only excessive water needs to be added through the water inlet pipe, at the moment, the water is conveyed into the water distribution pipe through the water storage piece and the transition piece, at the moment, the water distribution pipe guides the water into the L-shaped pipe, a large amount of water is sprayed out of the L-shaped pipe, and then the whole body is driven to rotate by rotating the main shaft, so that the slurry in the interlayer is effectively diluted; meanwhile, if large fiber impurities in the slurry adhere to the inner wall of the screen cylinder, high-pressure water flow is injected from the water inlet pipe similarly, the water flow is sprayed out of the L-shaped pipe and jetted to the screen cylinder to complete cleaning, the structure can effectively avoid slurry blockage, certain water can be given according to the requirements of different slurry water contents, and the cleaning efficiency is improved. And internal cleaning can be achieved without detaching a shell of the pressure screen, convenience and safety are achieved, and practicability and reliability of the device are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure screens, in particular to an anti-clogging pulp screening device. Background Art

[0002] In the papermaking process, screening and purification of pulp is an important process to improve the quality of paper. It often requires two or even three screening processes to screen out most of the impurities in the pulp. In current papermaking equipment, the pressure screen is the main equipment for performing this process. The working principle of the pressure screen: During the rotation of the pressure screen transmission mechanism, the blades on the transmission mechanism, also called rotors, move along the surface of the screen drum, exerting pressure on the pulp and increasing the pressure difference between the inside and outside of the screen drum. At this time, the good pulp will pass through the screen drum and be discharged from the good pulp pipe, and the impurities that have not been discharged will be discharged from the slag discharge pipe at the bottom of the pressure screen.

[0003] The existing pressure screens are often blocked. Most of the time, the pulp being screened inside the pressure screen cannot be discharged in time, and the large fiber impurities continue to snowball. As the internal rotor rotates, the water in the paper pulp will be squeezed out, making it more difficult to discharge. The traditional solution to the blockage problem is to add water from the bottom dilution pipe to dilute the pulp so that it is easy to discharge. However, this method can only alleviate the blockage problem in the bottom slag discharge area. The middle screening area cannot actually be effectively diluted. For this reason, an anti-blockage pulp screening device is proposed. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted in this utility model is:

[0006] A clogging-proof pulp screening device comprises a base, a pressure screen shell is fixedly installed on the top of the base, a good pulp pipe is provided on the surface of the pressure screen shell, a pulp inlet pipe is provided on the surface of the pressure screen shell, a heavy slag discharge pipe is provided on the top of the pressure screen shell near the pulp inlet pipe, a heavy slag collecting sleeve is clamped inside the base, a pulp inlet is provided in the middle of the heavy slag collecting sleeve, a rotor is fixedly installed on the bottom of the heavy slag collecting sleeve, a rotor is welded on the surface of the rotor, a distribution and introduction circular sleeve is movably sleeved on the bottom end of the rotor, a slag discharge pipe is fixedly installed on the surface of the distribution and introduction circular sleeve, and a distribution and introduction circular sleeve is fixedly installed on the surface There is a dilution water pipe, a screen drum is fixedly installed on the top of the distribution circular sleeve, the middle of the pressure screen shell is movably sleeved with a main shaft, the bottom of the main shaft is movably sleeved with a water storage part, a water inlet pipe is fixedly installed on the surface of the water storage part, a transition part is clamped on the top of the water storage part, a round hole is opened on the top of the transition part, a water distribution pipe is welded inside the round hole, a threaded branch pipe is fixedly installed on the surface of the water distribution pipe, an L-shaped pipe is sleeved inside the threaded branch pipe, one end of the L-shaped pipe is threadedly connected with a nut, one end of the L-shaped pipe is threadedly connected with a combination nut near the nut, and a servo motor is fixedly installed on the top of the base

[0007] Preferably, the heavy slag capture sleeve isolates the top area of ​​the pressure screen shell, and the pulp inlet pipe and the opening position of the pressure screen shell on the base surface are in the same horizontal layer.

[0008] Preferably, a collecting trough is provided in the middle of the dividing and drawing circular sleeve, the bottom of the heavy slag collecting sleeve is clamped with a screen drum, the screen drum and the rotor form an interlayer, and the collecting trough is communicated with the interlayer.

[0009] Preferably, a clearance hole is opened on the surface of the rotor, and the inside of the clearance hole is clamped with the L-shaped pipe.

[0010] Preferably, a limiting hole is provided inside the rotor, and the inside of the limiting hole is sleeved with the L-shaped tube.

[0011] Preferably, the top end of the water distribution pipe is fixedly mounted on the main shaft, and the middle of the transition piece is fixedly connected to the main shaft.

[0012] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0013] In the utility model, when the slurry is blocked in the interlayer between the screen drum and the rotor, it is only necessary to add excess water through the water inlet pipe. At this time, the water will be transmitted to the inside of the water distribution pipe through the water storage part and the transition part. At this time, the water distribution pipe will guide the water into the L-shaped pipe, and a large amount of water will be sprayed out from the L-shaped pipe. Then, the main shaft is rotated to drive the whole to rotate, so that the slurry in the interlayer is effectively diluted. At the same time, if large fiber impurities in the slurry adhere to the inner wall of the screen drum, high-pressure water flow is injected from the water inlet pipe in the same way, and the water flow is sprayed out from the L-shaped pipe and shot towards the screen drum to complete the cleaning. This structure can effectively avoid the occurrence of slurry blockage, and can also provide a certain amount of water according to the different slurry water content requirements, and internal cleaning can be achieved without removing the pressure screen shell, which is convenient and safe, and realizes the practicality and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of a pressure screen housing according to an embodiment of the utility model;

[0015] Figure 2 A schematic diagram of a screen drum according to an embodiment of the utility model;

[0016] Figure 3 A schematic diagram of a rotor according to an embodiment of the utility model;

[0017] Figure 4 A schematic diagram of a water inlet pipe according to an embodiment of the utility model;

[0018] Figure 5 A schematic diagram of the main shaft of an embodiment of the utility model;

[0019] Figure 6 A schematic diagram of a water distribution pipe according to an embodiment of the utility model;

[0020] Figure 7 A schematic diagram of a water storage member according to an embodiment of the utility model;

[0021] Figure 8 This is a schematic diagram of an L-shaped tube according to an embodiment of the utility model;

[0022] Fig. 9 This is a schematic diagram of a threaded branch pipe according to an embodiment of the utility model;

[0023] Fig.10 The figure is a schematic diagram of a combined nut according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] 1. Base; 2. Pressure screen shell; 3. Good slurry pipe; 4. Slurry inlet pipe; 5. Heavy slag discharge pipe; 6. Heavy slag collection sleeve; 7. Slurry inlet; 8. Rotor; 9. Rotor; 10. Distribution circular sleeve; 11. Collecting trough; 12. Slag discharge pipe; 13. Dilution water pipe; 14. Main shaft; 15. Water storage parts; 16. Water inlet pipe; 17. Transition parts; 18. Round holes; 19. Water distribution pipe; 20. Threaded branch pipe; 21. L-shaped pipe; 22. Nut; 23. Combination nut; 24. Make way hole; 25. Servo motor; 26. Screen drum. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0027] An anti-clogging pulp screening device provided by some embodiments of the utility model will be described below in conjunction with the accompanying drawings. Embodiment 1

[0028] Combination Figure 1-10 As shown, the utility model provides an anti-clogging pulp screening device, including a base 1, a pressure screen shell 2 is fixedly installed on the top of the base 1, a good pulp pipe 3 is opened on the surface of the pressure screen shell 2, and the good pulp after filtering and screening will be discharged from the good pulp pipe 3, a pulp inlet pipe 4 is opened on the surface of the pressure screen shell 2, and the original pulp will be injected into the pressure screen shell 2 from the pulp inlet pipe 4 to wait for filtration, and a heavy residue discharge pipe 5 is opened on the top of the pressure screen shell 2 near the pulp inlet pipe 4. After preliminary sedimentation and filtration, the heavy residue will be discharged from the heavy residue discharge pipe 5 to avoid directly entering the deep layer inside the pressure screen shell 2 and affecting the filtration effect. A heavy residue capture sleeve 6 is clamped inside the base 1. The heavy residue The capturing sleeve 6 isolates the top area of ​​the pressure screen housing 2, and the pulp inlet pipe 4 and the opening position of the pressure screen housing 2 on the surface of the base 1 are at the same horizontal layer, that is, the raw pulp will flow from the pulp inlet pipe 4 into the partition for preliminary precipitation, and the precipitated heavy slag will be directly discharged from the heavy slag discharge pipe 5, and then the raw pulp will flow into the interior of the pressure screen housing 2 along the heavy slag capturing sleeve 6 for the next step of filtering and separation. A slurry inlet 7 is opened in the middle of the heavy slag capturing sleeve 6, and a rotor 8 is fixedly installed at the bottom of the heavy slag capturing sleeve 6, and a rotor 9 is welded on the surface of the rotor 8. When the rotor 8 rotates, the rotor 9 on the surface of the rotor 8 rotates with it, so that the raw pulp entering here begins to be pressure separated.

[0029] Among them, the bottom end of the rotor 8 is movably sleeved with a separator sleeve 10, and a slag discharge pipe 12 is fixedly installed on the surface of the separator sleeve 10. The filtered impurities will enter the inside of the separator sleeve 10 and be discharged from the slag discharge pipe 12 to avoid blockage. A dilution water pipe 13 is fixedly installed on the surface of the separator sleeve 10. Water can flow into the dilution water pipe 13 to dilute the impurities, which is convenient for discharge from the slag discharge pipe 12 to prevent the bottom impurities from clogging and affecting the operation. A screen drum 26 is fixedly installed on the top of the separator sleeve 10. The screen drum 26 screens the raw pulp, and large fiber impurities such as paper mixed clumps will be filtered out, and the good pulp will pass through the screen drum 26 and be discharged from the good pulp pipe 3 to achieve separation. A collecting tank 11 is opened in the middle of the separator sleeve 10. The collecting tank 11 is the location where impurities are concentrated, and then the impurities are discharged from the discharge pipe 3. The slag pipe 12 is discharged, and the bottom of the heavy slag collection sleeve 6 is clamped with the screen drum 26. The screen drum 26 and the rotor 8 form a sandwich, and the collecting tank 11 is connected with the sandwich. The raw pulp will fall directly into the sandwich between the rotor 8 and the screen drum 26 from the pulp inlet 7. Under the action of the rotor 8, filtering and screening are achieved. Due to the existence of the sandwich, impurities will not easily flow out of the outside and mix with the good pulp to achieve separation. The middle movable sleeve of the pressure screen housing 2 is connected with the main shaft 14. The main shaft 14 is a combination, and contains a variety of components inside to drive the screening structure inside the pressure screen housing 2 to operate. A pulley is provided at the bottom end of the main shaft 14 for transmission. The bottom movable sleeve of the main shaft 14 is connected with a water storage part 15, and a water inlet pipe 16 is fixedly installed on the surface of the water storage part 15. High-pressure water flows into the water from the water inlet pipe 16. The water storage part 15 is waiting for the next diversion to dilute the blocked position. A transition piece 17 is clamped on the top of the water storage part 15. The middle of the transition piece 17 is fixedly connected to the main shaft 14, that is, when the main shaft 14 starts to rotate, the transition piece 17 will rotate with it, but the clamped water storage part 15 does not rotate. The water storage part 15 and the transition piece 17 are sealed to prevent water from seeping out and affecting the operation. A circular hole 18 is opened on the top of the transition piece 17. A water distribution pipe 19 is welded inside the circular hole 18. The water pouring into the water inlet pipe 16 will be divided and flowed into six water distribution pipes 19 so as to achieve more uniform dilution. The top of the water distribution pipe 19 is fixedly installed with the main shaft 14, and a threaded branch pipe 20 is fixedly installed on the surface of the water distribution pipe 19. The inner sleeve of the threaded branch pipe 20 is connected with An L-shaped tube 21 and a rotor 8 are provided with a clearance hole 24 on the surface, the interior of the clearance hole 24 is clamped with the L-shaped tube 21, a limiting hole is provided inside the rotor 9, the interior of the limiting hole is sleeved with the L-shaped tube 21, one end of the L-shaped tube 21 is threadedly connected with a nut 22, and one end of the L-shaped tube 21 is threadedly connected with a combination nut 23 near the nut 22. First, the combination nut 23 is rotated to fix the L-shaped tube 21 and the threaded branch tube 20, and the nut 22 is rotated to further fix and seal. A servo motor 25 is fixedly installed on the top of the base 1, and a pulley is also fixedly installed on the transmission end of the servo motor 25, which echoes the pulley of the main shaft 14. The two are connected by a belt, and the servo motor 25 is started to realize the rotation of the main shaft 14. At this time, the pressure screen can operate.

[0030] The working principle and use process of the utility model are as follows: first, when the inside is blocked and the dilution water pipe 13 cannot work, the external high-pressure water pipe is connected to the water inlet pipe 16 to transport water. At this time, a large amount of water flows into the water storage part 15. When the water storage part 15 is full, it flows into the transition part 17. At this time, the water will flow into the water distribution pipe 19 from the circular hole 18, and the water distribution pipe 19 will branch the water into the L-shaped pipe 21. Since the L-shaped pipe 21 is sleeved in the rotor 9, the servo motor 25 is started at this time to drive the main shaft 14 to rotate, and the main shaft 14 further drives the transition part 17 and the rotor 8 to rotate. At this time, water flows out from the water outlet hole of the L-shaped pipe 21 to evenly dilute the impurity slurry mixture in the interlayer and increase fluidity. At this time, the impurities will flow into the collection tank 11 and be discharged from the slag discharge pipe 12.

[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An anti-clogging pulp screening device, comprising a base (1), characterized in that: A pressure screen housing (2) is fixedly mounted on the top of the base (1), a good stock pipe (3) is provided on the surface of the pressure screen housing (2), a stock inlet pipe (4) is provided on the surface of the pressure screen housing (2), a heavy slag discharge pipe (5) is provided on the top of the pressure screen housing (2) near the stock inlet pipe (4), a heavy slag collection sleeve (6) is clamped inside the base (1), a slurry inlet (7) is provided in the middle of the heavy slag collection sleeve (6), a rotor (8) is fixedly mounted on the bottom of the heavy slag collection sleeve (6), a rotor (9) is welded on the surface of the rotor (8), a distribution and introduction sleeve (10) is movably sleeved on the bottom end of the rotor (8), a slag discharge pipe (12) is fixedly mounted on the surface of the distribution and introduction sleeve (10), a dilution water pipe (13) is fixedly mounted on the surface of the distribution and introduction sleeve (10), and the top of the distribution and introduction sleeve (10) is fixedly mounted. A screen drum (26) is installed, the middle of the pressure screen housing (2) is movably sleeved with a main shaft (14), the bottom of the main shaft (14) is movably sleeved with a water storage member (15), a water inlet pipe (16) is fixedly installed on the surface of the water storage member (15), a transition member (17) is clamped on the top of the water storage member (15), a round hole (18) is opened on the top of the transition member (17), a water distribution pipe (19) is welded inside the round hole (18), a threaded branch pipe (20) is fixedly installed on the surface of the water distribution pipe (19), an L-shaped pipe (21) is sleeved inside the threaded branch pipe (20), one end of the L-shaped pipe (21) is threadedly connected with a nut (22), and one end of the L-shaped pipe (21) is threadedly connected with a combination nut (23) at a position near the nut (22), and a servo motor (25) is fixedly installed on the top of the base (1).

2. The anti-clogging pulp screening device according to claim 1, characterized in that: The heavy slag capture sleeve (6) isolates the top area of ​​the pressure screen housing (2), and the slurry inlet pipe (4) and the opening position of the pressure screen housing (2) on the surface of the base (1) are located at the same horizontal layer.

3. The anti-clogging pulp screening device according to claim 1, characterized in that: A collecting trough (11) is provided in the middle of the separation and introduction circular sleeve (10), the bottom of the heavy slag collection sleeve (6) is engaged with a screen drum (26), the screen drum (26) and the rotor (8) form an interlayer, and the collecting trough (11) is in communication with the interlayer.

4. The anti-clogging pulp screening device according to claim 1, characterized in that: A clearance hole (24) is provided on the surface of the rotor (8), and the interior of the clearance hole (24) is clamped with the L-shaped tube (21).

5. The anti-clogging pulp screening device according to claim 1, characterized in that: A limiting hole is provided inside the rotor (9), and the inside of the limiting hole is sleeved with the L-shaped tube (21).

6. The anti-clogging pulp screening device according to claim 1, characterized in that: The top end of the water distribution pipe (19) is fixedly mounted on the main shaft (14), and the middle of the transition piece (17) is fixedly connected to the main shaft (14).

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