Waste paper papermaking pulping machine and pulping method

Abstract

The invention discloses a waste paper pulping machine and pulping method, comprising a frame, an outer grinding cylinder, a middle grinding cylinder, an inner grinding cylinder, an outer cylinder driving mechanism and an inner barrel driving mechanism, wherein the outer grinding cylinder is rotatably mounted on the frame, the middle grinding cylinder is arranged inside the outer grinding cylinder, the inner grinding cylinder is rotatably mounted inside the middle grinding cylinder, the outer cylinder driving mechanism is transmission-connected to the outer grinding cylinder, the inner barrel driving mechanism is transmission-connected to the inner grinding cylinder, and the rotation direction of the outer grinding cylinder is opposite to that of the inner grinding cylinder. The pulp first enters the inner grinding cylinder, and the large particles in the pulp are first broken by the beating blades to prevent jamming during pulping, so that the pulping process is smooth, wear is reduced, and the service life is increased; then the pulp flows into the space between the inner grinding cylinder and the middle grinding cylinder for coarse grinding, and then enters the space between the middle grinding cylinder and the outer grinding cylinder for fine grinding, and the pulp is coarsely and finely ground at the same time, so that the pulp is more uniform and the pulping effect is better, and two sets of pulping machines are not required, which saves space occupation and reduces production costs; the grinding area is large and the pulping efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of pulping machines, in particular to a waste paper papermaking pulping machine and a pulping method. Background Art

[0002] In the papermaking process, in order to make the pulp fibers finer, the pulp needs to be refined by a refiner. The existing refiner grinds the pulp by a rotating moving grinding disc and a fixed fixed grinding disc. The size of the contact surface between the moving grinding disc and the fixed grinding disc determines the refining speed of the refiner. The larger the contact area, the faster the refining speed, but its volume also gradually increases, resulting in a large space occupation, a large weight of the moving grinding disc, and a motor drive with a larger torque. The structure is complex and the cost is high. Moreover, the refiner in the prior art has only one refining process, and the refining is uneven. It is often necessary to set up two refiners to perform coarse grinding and fine grinding on the pulp respectively. The production process is complicated, the production cost is high, and the efficiency is low. In addition, during the refining process, large-particle pulp clumps are easy to get stuck on the moving grinding disc, the refining process is not smooth, and the grinding disc wears a lot. Therefore, it is necessary to improve it. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a waste paper papermaking pulping machine and a pulping method, which have a large pulping area, high pulping efficiency, small volume, simple structure, low cost, and can be refined from coarse to fine, with uniform pulp and good pulping effect.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a waste paper pulping machine, comprising a frame, an outer grinding cylinder, a middle grinding cylinder, an inner grinding cylinder, an outer grinding cylinder driving mechanism and an inner barrel driving mechanism, the outer grinding cylinder is rotatably mounted on the frame, the middle grinding cylinder is arranged inside the outer grinding cylinder, the inner grinding cylinder is rotatably mounted inside the middle grinding cylinder, the outer grinding cylinder driving mechanism is transmission-connected to the outer grinding cylinder, the inner barrel driving mechanism is transmission-connected to the inner grinding cylinder, and the rotation direction of the outer grinding cylinder is opposite to the rotation direction of the inner grinding cylinder;

[0005] The upper part of the inner grinding cylinder is provided with a feed port, the lower part of the inner grinding cylinder is provided with a first discharge port, the first discharge port is connected with the middle grinding cylinder, the upper part of the middle grinding cylinder is provided with a second discharge port, the second discharge port is connected with the outer grinding cylinder, and the lower part of the outer grinding cylinder is provided with a third discharge port.

[0006] There is a first refining gap between the inner grinding cylinder and the middle grinding cylinder, the first refining gap gradually decreases from bottom to top, there is a second refining gap between the middle grinding cylinder and the outer grinding cylinder, the second refining gap gradually decreases from top to bottom, and the first refining gap is larger than the second refining gap;

[0007] A beating chamber is arranged inside the inner grinding cylinder, and beating blades are arranged on the inner wall of the inner grinding cylinder.

[0008] In a further technical solution, the beating blade is a spiral blade, the outer edge of the spiral blade is fixedly mounted on the inner wall of the inner grinding cylinder, the inner edge of the spiral blade is provided with a blade, and the spiral blade spirals from top to bottom along the rotation direction of the inner grinding cylinder to squeeze the pulp in the beating chamber toward the first discharge port.

[0009] In a further technical solution, the outer wall of the inner grinding cylinder is provided with a first spiral grinding pattern, the inner wall of the middle grinding cylinder is provided with a second spiral grinding pattern, the outer wall of the middle grinding cylinder is provided with a third spiral grinding pattern, and the inner wall of the outer grinding cylinder is provided with a fourth spiral grinding pattern, the spiral direction of the first spiral grinding pattern is opposite to that of the second spiral grinding pattern, and the spiral direction of the third spiral grinding pattern is opposite to that of the fourth spiral grinding pattern;

[0010] The lower end of the first refining gap is 2-5 mm, the upper end of the first refining gap is 0.5-1 mm, the upper end of the second refining gap is 0.2-1 mm, and the lower end of the second refining gap is 0.01-0.1 mm.

[0011] In a further technical solution, the middle grinding cylinder is rotatably installed inside the outer grinding cylinder, an upper annular groove is provided on the upper part of the inner part of the outer grinding cylinder, a lower annular groove is provided on the lower part of the inner part of the outer grinding cylinder, the upper end of the middle grinding cylinder is open, the upper end of the middle grinding cylinder is rotatably installed on the upper annular groove, a mounting cylinder with an opening facing downward is extended from the lower end surface of the middle grinding cylinder, the lower end of the mounting cylinder is rotatably installed on the lower annular groove, a plurality of second discharge ports are provided at intervals along the circumferential direction on the upper part of the middle grinding cylinder, a plurality of feeding ports are provided at intervals along the circumferential direction on the side wall of the mounting cylinder, and the second refining gap is connected with the third discharge port through each feeding port.

[0012] In a further technical solution, a through-cylinder hole is provided at the central portion of the upper end surface of the outer grinding cylinder, the upper portion of the inner grinding cylinder extends out from the through-cylinder hole and is transmission-connected to the inner cylinder driving mechanism, a sealed bearing is embedded in the through-cylinder hole, the upper portion of the inner grinding cylinder is rotatably mounted on the through-cylinder hole through the sealed bearing, an inner annular groove is provided at the inner lower end surface of the middle grinding cylinder, the lower end of the inner grinding cylinder is rotatably mounted on the inner annular groove, a plurality of first discharge ports are provided at intervals along the circumferential direction on the side wall of the lower portion of the inner grinding cylinder, and each first discharge port is respectively provided with a filter screen.

[0013] In a further technical solution, the outer grinding cylinder includes a cylinder body, an upper end cover and a lower end cover, the upper end cover flange is connected to the upper end of the cylinder body, the lower end cover flange is connected to the lower end of the cylinder body, the upper annular groove is arranged on the inner side surface of the upper end cover, the lower annular groove is arranged on the inner side surface of the lower end cover, and the through-cylinder hole is opened in the center part of the upper end cover.

[0014] In a further technical solution, two upper rails arranged in parallel are arranged on the upper part of the frame, and two lower rails arranged in parallel are arranged on the lower part. The three-drum refiner is also provided with a first drive bracket and a second drive bracket. The upper part and the lower part of the first drive bracket and the second drive bracket are respectively provided with rollers, and each roller is respectively slidably matched with the corresponding upper rail and lower rail. The first drive bracket and the second drive bracket are respectively provided with an outer drum drive mechanism. The left and right sides of the frame are respectively provided with a first drive cylinder and a second drive cylinder. The first drive cylinder is transmission-connected to the first drive bracket, and the second drive cylinder is transmission-connected to the second drive bracket.

[0015] Each outer cylinder driving mechanism comprises an outer cylinder driving motor, a coupling and a roller drive assembly, the outer cylinder driving motor is drivingly connected to the coupling, the coupling is drivingly connected to the roller drive assembly, and the roller drive assembly is drivingly connected to the outer grinding cylinder;

[0016] The roller drive assembly includes a supporting wheel and two bearing seats, the two bearing seats are coaxial and spaced apart, the supporting wheel is rotatably installed between the two bearing seats, the outer cylinder driving motor is connected to the supporting wheel, and the supporting wheel and the outer grinding cylinder are in rolling cooperation;

[0017] The outer wall of the outer grinding cylinder is provided with two wheel rims at intervals, and each wheel rim is respectively connected to four outer cylinder driving mechanisms in a circumferential direction. The first driving bracket is fixed with two outer cylinder driving mechanisms, and the second driving bracket is fixed with two outer cylinder driving mechanisms. The first driving bracket and the second driving bracket are also respectively provided with two limiting mechanisms, and the limiting mechanisms include a blocking wheel seat and a blocking wheel, and the blocking wheel is rotatably installed on the inner end part of the blocking wheel seat, and the two blocking wheels of the first driving bracket are respectively abutted against the upper side and lower side of the two wheel rims, and the two blocking wheels of the second driving bracket are respectively abutted against the upper side and lower side of the two wheel rims.

[0018] In a further technical solution, the inner barrel driving mechanism includes an inner barrel driving motor, a transmission belt and two pulleys, the inner barrel driving motor is fixedly mounted on the frame, the transmission belt is respectively connected to the two pulleys, one pulley is fixedly mounted on the main shaft of the inner barrel driving motor, and the other pulley is sleeved on the upper part of the inner grinding barrel;

[0019] The feed port of the inner grinding drum is connected to a feed pipe through a rotary connecting flange, and the third discharge port of the outer grinding drum is connected to a discharge pipe through another rotary connecting flange. A feed valve is arranged on the feed pipe, and a discharge valve is arranged on the discharge pipe.

[0020] A waste paper pulping method comprises the following steps:

[0021] S1: The first driving cylinder and the second driving cylinder are used to move the first driving bracket and the second driving bracket inwards respectively until each outer cylinder driving mechanism is connected to the outer grinding cylinder by driving;

[0022] S2: Open the feed valve and pump the pulp to be ground in the pulp pool to the pulping chamber through the pulp pump;

[0023] S3: starting the inner drum driving motor to drive the inner grinding drum to rotate forward, and the rotating spiral blades break up the paper pulp to be ground in the beating chamber, and squeeze it into the first refining gap through the filter screen of the first discharge port to obtain coarse pulp;

[0024] S4: Start each outer cylinder drive motor to drive the outer grinding cylinder to reverse, and the coarse pulp enters the second grinding gap through the second discharge port to obtain fine pulp.

[0025] S5: Open the discharge valve to discharge the material.

[0026] In a further technical solution, step S2 further includes opening a feed valve and closing a discharge valve, and pumping the to-be-grinded pulp in the pulp pool to the pulping chamber through a pulp pump until the pulping chamber is fully filled;

[0027] Step S4 also includes closing the feed valve after the beating chamber, the first refining gap and the second refining gap are filled with pulp;

[0028] Step S5 also includes opening the discharge valve to discharge the material after 5 to 15 minutes, closing the discharge valve after the pulp in the second refining gap is discharged, opening the feed valve again until the second refining gap is refilled with pulp, closing the feed valve, opening the discharge valve to discharge the material after 5 to 15 minutes, and repeating the cycle.

[0029] After adopting the above structure, the advantages of the present invention compared with the prior art are: the pulp first enters the inner grinding cylinder, and the large particles in the pulp are first broken up by the beating blades to prevent jamming during refining, and the refining process is smooth, reducing wear and improving the service life; then the pulp flows into the space between the inner grinding cylinder and the middle grinding cylinder through the first discharge port, is coarsely ground as the inner grinding cylinder rotates, and then enters the space between the middle grinding cylinder and the outer grinding cylinder from the second discharge port, is finely ground as the outer grinding cylinder rotates in the opposite direction, and finally flows out from the third discharge port, and the pulp is coarsely and finely ground at the same time, the pulp is more uniform, the refining effect is better, and there is no need for two sets of refiners, which saves space and reduces production costs; the pulp is refined through the side walls of the inner grinding cylinder, the middle grinding cylinder and the outer grinding cylinder, so the grinding area is large and the refining efficiency is high; the pulp can be continuously refined in flow without the need for batch refining, which further improves the refining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the state in which the outer cylinder driving mechanism of the present invention is disengaged from the outer grinding cylinder;

[0033] Figure 3 is an exploded view of the inner grinding cylinder of the present invention;

[0034] Figure 4 It is a cross-sectional view of the inner grinding barrel, the middle grinding barrel and the outer grinding barrel of the present invention;

[0035] Figure 5 It is an exploded view of the inner grinding barrel, the middle grinding barrel and the outer grinding barrel of the present invention;

[0036] Figure 6 It is the pulp flow diagram of the present invention.

[0037] In the figure:

[0038] 1 frame, 11 upper track, 12 lower track, 13 first driving bracket, 14 second driving bracket, 15 roller, 16 first driving cylinder, 17 second driving cylinder;

[0039] 2 outer grinding cylinder, 21 cylinder body, 22 upper end cover, 221 upper annular slide groove, 222 cylinder hole, 23 lower end cover, 231 lower annular slide groove, 24 wheel rim, 25 third discharge port, 26 sealed bearing;

[0040] 3 middle grinding cylinder, 31 second discharge port, 32 mounting cylinder, 33 feeding port, 34 inner annular chute;

[0041] 4 inner grinding cylinder, 41 feed port, 42 first discharge port, 43 filter screen, 44 beating chamber, 45 spiral blade, 46 blade;

[0042] 51 outer cylinder driving motor, 52 coupling, 53 supporting wheel, 54 bearing seat, 55 blocking wheel seat, 56 blocking wheel;

[0043] 61 inner cylinder driving motor, 62 transmission belt, 63 pulley;

[0044] 71 a first refining gap, 72 a second refining gap;

[0045] 81 feed pipe, 82 feed valve, 83 discharge pipe, 84 discharge valve, 85 rotary connector. DETAILED DESCRIPTION

[0046] The following are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

[0047] A waste paper pulping machine, such as Figures 1 to 6As shown, it includes a frame 1, an outer grinding cylinder 2, a middle grinding cylinder 3, an inner grinding cylinder 4, an outer grinding cylinder driving mechanism and an inner barrel driving mechanism. The outer grinding cylinder 2 is rotatably mounted on the frame 1, the middle grinding cylinder 3 is arranged inside the outer grinding cylinder 2, and the inner grinding cylinder 4 is rotatably mounted inside the middle grinding cylinder 3. The outer grinding cylinder driving mechanism is transmission-connected to the outer grinding cylinder 2, and the inner barrel driving mechanism is transmission-connected to the inner grinding cylinder 4. The rotation direction of the outer grinding cylinder 2 is opposite to that of the inner grinding cylinder 4. The upper part of the inner grinding cylinder 4 is provided with a feed port 41, and the lower part of the inner grinding cylinder 4 is provided with a first discharge port 42, and the first discharge port 42 is connected to the middle grinding cylinder 3. A second discharge port 31 is provided on the upper part of the middle grinding cylinder 3, and the second discharge port 31 is communicated with the outer grinding cylinder 2. A third discharge port 25 is provided on the lower part of the outer grinding cylinder 2. A first refining gap 71 is provided between the inner grinding cylinder 4 and the middle grinding cylinder 3, and the first refining gap 71 gradually decreases from bottom to top. A second refining gap 72 is provided between the middle grinding cylinder 3 and the outer grinding cylinder 2, and the second refining gap 72 gradually decreases from top to bottom, and the first refining gap 71 is larger than the second refining gap 72. A beating chamber 44 is provided inside the inner grinding cylinder 4, and beating blades are provided on the inner wall of the inner grinding cylinder 4.

[0048] The conventional pulping machine only relies on the relative rotation of two grinding discs for pulping, which has a small grinding area, a large volume, a low pulping efficiency, and cannot perform coarse grinding and fine grinding at the same time. It needs to rely on two sets of pulping machines for pulping, which has high production cost and high energy consumption. The pulp of the present invention first enters the inner grinding cylinder 4, and the large particles in the pulp are first broken by the pulping blades to prevent jamming during pulping, so that the pulping process is smooth, wear is reduced, and the service life is increased; then the pulp flows into the space between the inner grinding cylinder 4 and the middle grinding cylinder 3 through the first discharge port 42, and as the inner grinding cylinder 4 is The cylinder 3 rotates for coarse grinding, then enters between the middle grinding cylinder 3 and the outer grinding cylinder 2 from the second discharge port 31, and is finely ground as the outer grinding cylinder 2 rotates in the opposite direction, and finally flows out from the third discharge port 25. The pulp is coarsely ground and finely ground at the same time, and the pulp is more uniform and the refining effect is better. There is no need for two sets of pulping machines, which saves space and reduces production costs. The pulp is refined through the side walls of the inner grinding cylinder 4, the middle grinding cylinder 3 and the outer grinding cylinder 2, with a large grinding area and high refining efficiency. The pulp can be continuously refined without batch refining, which further improves the refining efficiency.

[0049] Specifically, the beating blade is a spiral blade 45, the outer edge of the spiral blade 45 is fixedly mounted on the inner wall of the inner grinding cylinder 4, the inner edge of the spiral blade 45 is provided with a blade 46, and the spiral blade 45 spirals from top to bottom along the rotation direction of the inner grinding cylinder 4 to squeeze the pulp in the beating chamber 44 toward the first discharge port 42. Since the first refining gap 71 and the second refining gap 72 are relatively small, it is difficult for the pulp to provide a large thrust only by the pulp pump. Therefore, during the pulping process, the spiral blade 45 simultaneously squeezes the pulp in the beating chamber 44 toward the first discharge port 42, so that the pulp can smoothly enter the first refining gap 71. During the refining process, the pulp is often mixed with large-particle paper clumps. If large-particle paper clumps enter the first refining gap 71 or the second refining gap 72, they are prone to jamming. When the spiral blade 45 squeezes the pulp, the blade 46 on the spiral blade 45 simultaneously crushes the large particles in the pulp to prevent the large-particle pulp from clogging the first refining gap 71 or the second refining gap 72, thereby improving stability.

[0050] Specifically, the outer wall of the inner grinding cylinder 4 is provided with a first spiral grinding pattern, the inner wall of the middle grinding cylinder 3 is provided with a second spiral grinding pattern, the outer wall of the middle grinding cylinder 3 is provided with a third spiral grinding pattern, and the inner wall of the outer grinding cylinder 2 is provided with a fourth spiral grinding pattern. The spiral directions of the first spiral grinding pattern and the second spiral grinding pattern are opposite, and the spiral directions of the third spiral grinding pattern and the fourth spiral grinding pattern are opposite; when the inner grinding cylinder 4 rotates relative to the middle grinding cylinder 3, the first spiral grinding pattern rotates in the opposite direction to the second spiral grinding pattern, thereby improving the refining efficiency; similarly, when the outer grinding cylinder 2 rotates relative to the middle grinding cylinder 3, the third spiral grinding pattern rotates in the opposite direction to the fourth spiral grinding pattern, thereby improving the refining efficiency.

[0051] The lower end of the first refining gap 71 is 2-5 mm, the upper end of the first refining gap 71 is 0.5-1 mm, the upper end of the second refining gap 72 is 0.2-1 mm, and the lower end of the second refining gap 72 is 0.01-0.1 mm. The outer grinding cylinder 2 is cylindrical, and the inner diameter of the outer grinding cylinder 2 gradually decreases from top to bottom. The middle grinding cylinder 3 is truncated cone-shaped, and the inner diameter of the middle grinding cylinder 3 gradually decreases from top to bottom. The inner grinding cylinder 4 is truncated cone-shaped, and the outer diameter of the middle grinding cylinder 3 gradually increases from top to bottom, thereby forming a first refining gap 71 and a second refining gap 72 with a slope. The pulp is coarsely ground in the first refining gap 71, and the pulp is finely ground in the second refining gap 72. The coarse grinding and fine grinding are performed at the same time, the refining efficiency is high, and the pulp is more uniform.

[0052] Specifically, the middle grinding cylinder 3 is rotatably installed inside the outer grinding cylinder 2, an upper annular groove 221 is opened in the upper part of the inner part of the outer grinding cylinder 2, a lower annular groove 231 is opened in the lower part of the inner part of the outer grinding cylinder 2, the upper end of the middle grinding cylinder 3 is open, and the upper end of the middle grinding cylinder 3 is rotatably installed on the upper annular groove 221, a mounting cylinder 32 with an opening facing downward is extended from the lower end surface of the middle grinding cylinder 3, and the lower end of the mounting cylinder 32 is rotatably installed on the lower annular groove 231, a plurality of second discharge ports 31 are spaced apart along the circumferential direction on the upper part of the middle grinding cylinder 3, a plurality of through ports 33 are spaced apart on the side wall of the mounting cylinder 32 along the circumferential direction, and the second refining gap 72 is connected with the third discharge port 25 through each through port 33.

[0053] During refining, the inner grinding drum 4 rotates in the opposite direction to the outer grinding drum 2, while the middle grinding drum 3 is relatively stationary. When a large-particle pulp mass enters the first refining gap 71 and becomes blocked, the middle grinding drum 3 rotates with the inner grinding drum 4 driven by the large-particle pulp mass to prevent jamming. As the middle grinding drum 3 rotates, the large-particle pulp mass decomposes under the gravity of the middle grinding drum 3, and the middle grinding drum 3 returns to a relatively stationary state. Similarly, when a large-particle pulp mass enters the second refining gap 72 and becomes blocked, the middle grinding drum 3 rotates with the outer grinding drum 2 driven by the large-particle pulp mass. Under the gravity of the middle grinding drum 3, the large-particle pulp mass decomposes and the middle grinding drum 3 returns to a relatively stationary state, thereby completely eliminating jamming and jamming and improving stability.

[0054] Specifically, a through-cylinder hole 222 is provided at the central portion of the upper end surface of the outer grinding cylinder 2, the upper portion of the inner grinding cylinder 4 extends out from the through-cylinder hole 222 and is transmission-connected to the inner cylinder driving mechanism, a sealed bearing 26 is embedded in the through-cylinder hole 222, the upper portion of the inner grinding cylinder 4 is rotatably mounted on the through-cylinder hole 222 via the sealed bearing 26, an inner annular groove 34 is provided at the inner lower end surface of the middle grinding cylinder 3, the lower end of the inner grinding cylinder 4 is rotatably mounted on the inner annular groove 34, a plurality of first discharge ports 42 are provided at intervals on the side wall of the lower portion of the inner grinding cylinder 4 along the circumferential direction, and each first discharge port 42 is respectively provided with a filter screen 43. After the pulp enters the first discharge port 42, it is screened and filtered through the filter screen 43 to further prevent large particles of pulp from entering the first refining gap 71; preferably, each second discharge port 31 and the feed port 33 is also installed with a filter screen 43, the filtering accuracy of the filter screen 43 installed at the first discharge port 42 is lower than the filtering accuracy of the filter screen 43 installed at the second discharge port 31, and the filtering accuracy of the filter screen 43 installed at the second discharge port 31 is lower than the filtering accuracy of the filter screen 43 installed at the feed port 33.

[0055] Specifically, the outer grinding cylinder 2 includes a cylinder body 21, an upper end cover 22 and a lower end cover 23. The upper end cover 22 is flange-connected to the upper end of the cylinder body 21, and the lower end cover 23 is flange-connected to the lower end of the cylinder body 21. The upper annular chute 221 is provided on the inner side of the upper end cover 22, and the lower annular chute 231 is provided on the inner side of the lower end cover 23. The through-tube hole 222 is provided in the center of the upper end cover 22. The inner grinding cylinder 4 and the middle grinding cylinder 3 can be disassembled by opening the upper end cover 22 or the lower end cover 23, which is convenient for later maintenance and cleaning.

[0056] Specifically, the upper part of the frame 1 is provided with two upper rails 11 arranged in parallel, and the lower part is provided with two lower rails 12 arranged in parallel. The three-drum refiner is also provided with a first driving bracket 13 and a second driving bracket 14. The upper and lower parts of the first driving bracket 13 and the second driving bracket 14 are respectively provided with rollers 15, and each roller 15 is respectively slidably matched with the corresponding upper rail 11 and lower rail 12. The first driving bracket 13 and the second driving bracket 14 are respectively provided with outer drum driving mechanisms. The left and right sides of the frame 1 are respectively provided with a first driving cylinder 16 and a second driving cylinder 17. The first driving cylinder 16 is transmission-connected to the first driving bracket 13, and the second driving cylinder 17 is transmission-connected to the second driving bracket 14; each outer drum driving mechanism includes an outer drum driving motor 51, a coupling 52 and a roller drive assembly. The outer drum driving motor 51 is transmission-connected to the coupling 52, the coupling 52 is transmission-connected to the roller drive assembly, and the roller drive assembly is transmission-connected to the outer grinding drum 2 The roller drive assembly includes a supporting wheel 53 and two bearing seats 54, the two bearing seats 54 are coaxial and spaced apart, the supporting wheel 53 is rotatably mounted between the two bearing seats 54, the outer cylinder drive motor 51 is transmission-connected to the supporting wheel 53, and the supporting wheel 53 and the outer grinding cylinder 2 are rollingly matched; the outer wall of the outer grinding cylinder 2 is sleeved with two wheel rims 24 at intervals, each wheel rim 24 is transmission-connected to four outer cylinder drive mechanisms in the circumferential direction, the first drive bracket 13 is fixedly mounted with two outer cylinder drive mechanisms, the second drive bracket 14 is fixed with two outer cylinder drive mechanisms, the first drive bracket 13 and the second drive bracket 14 are also respectively provided with two limiting mechanisms, the limiting mechanisms include a blocking wheel seat 55 and a blocking wheel 56, the blocking wheel 56 is rotatably mounted on the inner end of the blocking wheel seat 55, the two blocking wheels 56 of the first drive bracket 13 are respectively abutted against the upper side and lower side of the two wheel rims 24, and the two blocking wheels 56 of the second drive bracket 14 are respectively abutted against the upper side and lower side of the two wheel rims 24.

[0057] During refining, Figure 1As shown, the first driving cylinder 16 and the second driving cylinder 17 respectively drive the first driving bracket 13 and the second driving bracket 14 to move inward until the outer grinding cylinder 2 is clamped between the first driving bracket 13 and the second driving bracket 14. At this time, each supporting wheel 53 contacts and cooperates with the wheel rim 24, and the outer cylinder driving motor 51 drives the supporting wheel 53 to rotate through the coupling 52, and the supporting wheel 53 drives the outer grinding cylinder 2 to rotate. In order to prevent the outer grinding cylinder 2 from moving up and down during rotation, the outer grinding cylinder 2 is limited in the upper and lower directions by two upper and lower limiting mechanisms. The friction between the limiting mechanism and the wheel rim 24 is reduced by the rotating stop wheel 56, so that the outer grinding cylinder 2 rotates more smoothly and the output pressure of the outer cylinder driving motor 51 is reduced.

[0058] Specifically, the inner drum driving mechanism includes an inner drum driving motor 61, a transmission belt 62 and two pulleys 63. The inner drum driving motor 61 is fixedly mounted on the frame 1. The transmission belt 62 is respectively connected to the two pulleys 63. One pulley 63 is fixedly mounted on the main shaft of the inner drum driving motor 61, and the other pulley 63 is sleeved on the upper part of the inner grinding drum 4. The feed port 41 of the inner grinding drum 4 is flange-connected with a feed pipe 81 through a rotary connection 85, and the third discharge port 25 of the outer grinding drum 2 is flange-connected with a discharge pipe 83 through another rotary connection 85. A feed valve 82 is provided on the feed pipe 81, and a discharge valve 84 is provided on the discharge pipe 83. The inner drum driving mechanism adopts a pulley transmission mode, which is simple, reliable and low in cost. The feed valve 82 and the discharge valve 84 are electromagnetic valves, which are connected by a control circuit to the feed valve 82, the discharge valve 84, each inner cylinder drive motor 61 and each outer cylinder drive motor 51 to achieve full automatic control without manual operation, which is more convenient to use.

[0059] like Figure 2 As shown, when disassembling and cleaning the inside of the outer grinding cylinder 2, or when disassembling and maintaining, first remove the transmission belt 62 to disengage the inner cylinder driving mechanism from the inner grinding cylinder 4, and then drive the first driving bracket 13 and the second driving bracket 14 to move outwards by the first driving cylinder 16 and the second driving cylinder 17 respectively, so that each outer cylinder driving mechanism is disengaged from the outer grinding cylinder 2. At this time, there is a large gap between the first driving bracket 13 and the second driving bracket 14 and the outer grinding cylinder 2, providing disassembly space for easy maintenance and cleaning.

[0060] A waste paper pulping method comprises the following steps:

[0061] S1: The first drive cylinder 16 and the second drive cylinder 17 are used to move the first drive bracket 13 and the second drive bracket 14 inwards respectively until each outer cylinder drive mechanism is connected to the outer grinding cylinder 2 by transmission;

[0062] S2: Open the feed valve 82 and pump the pulp to be ground in the pulp pool to the pulping chamber 44 through the pulp pump;

[0063] S3: Start the inner drum drive motor 61 to drive the inner grinding drum 4 to rotate forward, and the rotating spiral blades 45 break up the paper pulp to be ground in the beating chamber 44, and squeeze it into the first refining gap 71 through the filter screen 43 of the first discharge port 42 to obtain coarse pulp;

[0064] S4: Start each outer cylinder driving motor 51 to drive the outer grinding cylinder 2 to reverse, and the coarse pulp enters the second grinding gap 72 through the second discharge port 31 to obtain fine pulp.

[0065] S5: Open the discharge valve 84 to discharge the material.

[0066] The pulp continues to pass through the beating chamber 44, the first refining gap 71 and the second refining gap 72 to complete the refining, and the pulp is discharged uninterruptedly, and the refining efficiency is higher.

[0067] Specifically, step S2 further includes opening the feed valve 82 and closing the discharge valve 84, and pumping the to-be-refined pulp in the pulp pool to the pulping chamber 44 through the pulp pump until the pulping chamber 44 is fully filled;

[0068] Step S4 also includes closing the feed valve 82 after the beating chamber 44, the first refining gap 71 and the second refining gap 72 are filled with pulp;

[0069] Step S5 also includes: opening the discharge valve 84 to discharge the pulp after 5 to 15 minutes, closing the discharge valve 84 after the pulp in the second refining gap 72 is discharged, opening the feed valve 82 again, closing the feed valve 82 after the pulp is refilled in the second refining gap 72, and opening the discharge valve 84 to discharge the pulp after 5 to 15 minutes, and repeating the cycle. The pulp is always kept in the refiner for 5 to 15 minutes of grinding time, which further improves the refining effect. The control circuit is automatically controlled, and no manual operation is required, which is more convenient to use.

Claims

1. A waste paper pulping machine, characterized in that: The machine comprises a frame (1), an outer grinding cylinder (2), a middle grinding cylinder (3), an inner grinding cylinder (4), an outer grinding cylinder driving mechanism and an inner barrel driving mechanism, wherein the outer grinding cylinder (2) is rotatably mounted on the frame (1), the middle grinding cylinder (3) is arranged inside the outer grinding cylinder (2), and the inner grinding cylinder (4) is rotatably mounted inside the middle grinding cylinder (3), the outer grinding cylinder driving mechanism is transmission-connected to the outer grinding cylinder (2), and the inner barrel driving mechanism is transmission-connected to the inner grinding cylinder (4), and the rotation direction of the outer grinding cylinder (2) is opposite to the rotation direction of the inner grinding cylinder (4); The upper portion of the inner grinding cylinder (4) is provided with a feed port (41), the lower portion of the inner grinding cylinder (4) is provided with a first discharge port (42), the first discharge port (42) is connected to the middle grinding cylinder (3), the upper portion of the middle grinding cylinder (3) is provided with a second discharge port (31), the second discharge port (31) is connected to the outer grinding cylinder (2), and the lower portion of the outer grinding cylinder (2) is provided with a third discharge port (25). The first material outlet (42) is provided with a filter screen (43), and the second material outlet (31) and the material passage opening (33) are also provided with filter screens (43), the filtering accuracy of the filter screen (43) installed at the first material outlet (42) is lower than the filtering accuracy of the filter screen (43) installed at the second material outlet (31), and the filtering accuracy of the filter screen (43) installed at the second material outlet (31) is lower than the filtering accuracy of the filter screen (43) installed at the material passage opening (33); A first refining gap (71) is provided between the inner grinding cylinder (4) and the middle grinding cylinder (3), the first refining gap (71) gradually decreases from bottom to top, a second refining gap (72) is provided between the middle grinding cylinder (3) and the outer grinding cylinder (2), the second refining gap (72) gradually decreases from top to bottom, and the first refining gap (71) is larger than the second refining gap (72); A beating chamber (44) is provided inside the inner grinding cylinder (4), and beating blades are provided on the inner wall of the inner grinding cylinder (4); The beating blade is a spiral blade (45), the outer edge of the spiral blade (45) is fixedly mounted on the inner wall of the inner grinding cylinder (4), the inner edge of the spiral blade (45) is provided with a blade (46), and the spiral blade (45) spirals from top to bottom along the rotation direction of the inner grinding cylinder (4) to squeeze the pulp in the beating chamber (44) toward the first discharge port (42).

2. A waste paper pulping machine according to claim 1, characterized in that: The outer wall of the inner grinding cylinder (4) is provided with a first spiral grinding pattern, the inner wall of the middle grinding cylinder (3) is provided with a second spiral grinding pattern, the outer wall of the middle grinding cylinder (3) is provided with a third spiral grinding pattern, and the inner wall of the outer grinding cylinder (2) is provided with a fourth spiral grinding pattern, the spiral direction of the first spiral grinding pattern is opposite to that of the second spiral grinding pattern, and the spiral direction of the third spiral grinding pattern is opposite to that of the fourth spiral grinding pattern; The lower end of the first refining gap (71) is 2-5 mm, the upper end of the first refining gap (71) is 0.5-1 mm, the upper end of the second refining gap (72) is 0.2-1 mm, and the lower end of the second refining gap (72) is 0.01-0.1 mm.

3. A waste paper pulping machine according to claim 1, characterized in that: The middle grinding cylinder (3) is rotatably mounted inside the outer grinding cylinder (2); an upper annular groove (221) is provided at the upper part of the inner part of the outer grinding cylinder (2); a lower annular groove (231) is provided at the lower part of the inner part of the outer grinding cylinder (2); the upper end of the middle grinding cylinder (3) is open; the upper end of the middle grinding cylinder (3) is rotatably mounted on the upper annular groove (221); a mounting cylinder (32) with an opening facing downward is extended from the lower end surface of the middle grinding cylinder (3); the lower end of the mounting cylinder (32) is rotatably mounted on the lower annular groove (231); a plurality of second discharge ports (31) are provided at intervals along the circumferential direction at the upper part of the middle grinding cylinder (3); a plurality of threading ports (33) are provided at intervals along the circumferential direction on the side wall of the mounting cylinder (32); the second refining gap (72) is connected to the third discharge port (25) through each threading port (33).

4. A waste paper pulping machine according to claim 3, characterized in that: A through-barrel hole (222) is provided at the center of the upper end surface of the outer grinding barrel (2), the upper portion of the inner grinding barrel (4) extends out from the through-barrel hole (222) and is drivingly connected to the inner barrel driving mechanism, a sealing bearing (26) is embedded in the through-barrel hole (222), the upper portion of the inner grinding barrel (4) is rotatably mounted on the through-barrel hole (222) via the sealing bearing (26), an inner annular slide groove (34) is provided on the inner lower end surface of the middle grinding barrel (3), the lower end of the inner grinding barrel (4) is rotatably mounted on the inner annular slide groove (34), and a plurality of first discharge ports (42) are provided at intervals on the side wall of the lower portion of the inner grinding barrel (4) along the circumferential direction.

5. A waste paper pulping machine according to claim 4, characterized in that: The outer grinding cylinder (2) comprises a cylinder body (21), an upper end cover (22) and a lower end cover (23); the upper end cover (22) is flange-connected to the upper end of the cylinder body (21); the lower end cover (23) is flange-connected to the lower end of the cylinder body (21); the upper annular slide groove (221) is arranged on the inner side surface of the upper end cover (22); the lower annular slide groove (231) is arranged on the inner side surface of the lower end cover (23); and the through-cylinder hole (222) is opened at the center of the upper end cover (22).

6. A waste paper pulping machine according to any one of claims 1 to 5, characterized in that: The upper part of the frame (1) is provided with two upper rails (11) arranged in parallel, and the lower part is provided with two lower rails (12) arranged in parallel. The pulping machine is also provided with a first driving bracket (13) and a second driving bracket (14). The upper part and the lower part of the first driving bracket (13) and the second driving bracket (14) are respectively provided with rollers (15). Each roller (15) is slidably matched with the corresponding upper rail (11) and lower rail (12). The first driving bracket (13) and the second driving bracket (14) are respectively provided with the outer cylinder driving mechanism. The left and right sides of the frame (1) are respectively provided with a first driving cylinder (16) and a second driving cylinder (17). The first driving cylinder (16) is drivingly connected to the first driving bracket (13), and the second driving cylinder (17) is drivingly connected to the second driving bracket (14). Each outer cylinder driving mechanism comprises an outer cylinder driving motor (51), a coupling (52) and a roller driving assembly, the outer cylinder driving motor (51) is drivingly connected to the coupling (52), the coupling (52) is drivingly connected to the roller driving assembly, and the roller driving assembly is drivingly connected to the outer grinding cylinder (2); The roller drive assembly comprises a supporting wheel (53) and two bearing seats (54), the two bearing seats (54) are coaxial and spaced apart, the supporting wheel (53) is rotatably mounted between the two bearing seats (54), the outer cylinder drive motor (51) is transmission-connected to the supporting wheel (53), and the supporting wheel (53) and the outer grinding cylinder (2) are in rolling cooperation; Two wheel rims (24) are provided at intervals on the outer wall of the outer grinding cylinder (2), and each wheel rim (24) is respectively connected to four outer cylinder driving mechanisms in a circumferential direction. The first driving bracket (13) is fixedly mounted with the two outer cylinder driving mechanisms, and the second driving bracket (14) is fixedly mounted with the two outer cylinder driving mechanisms. The first driving bracket (13) and the second driving bracket (14) are also respectively provided with two limiting mechanisms, and the limiting mechanisms include a blocking wheel seat (55) and a blocking wheel (56). The blocking wheel (56) is rotatably mounted on the inner end of the blocking wheel seat (55). The two blocking wheels (56) of the first driving bracket (13) are respectively abutted against the upper side surface and the lower side surface of the two wheel rims (24), and the two blocking wheels (56) of the second driving bracket (14) are respectively abutted against the upper side surface and the lower side surface of the two wheel rims (24).

7. A waste paper pulping machine according to claim 6, characterized in that: The inner barrel driving mechanism comprises an inner barrel driving motor (61), a transmission belt (62) and two pulleys (63); the inner barrel driving motor (61) is fixedly mounted on the first driving bracket (13) or the second driving bracket (14); the transmission belt (62) is respectively connected to the two pulleys (63); one pulley (63) is fixedly mounted on the main shaft of the inner barrel driving motor (61); and the other pulley (63) is sleeved on the upper part of the inner grinding barrel (4); The feed port (41) of the inner grinding cylinder (4) is flange-connected to a feed pipe (81) via a rotary connection piece (85), and the third discharge port (25) of the outer grinding cylinder (2) is flange-connected to a discharge pipe (83) via another rotary connection piece (85). The feed pipe (81) is provided with a feed valve (82), and the discharge pipe (83) is provided with a discharge valve (84).

8. A waste paper pulping method, using a waste paper pulping machine according to any one of claims 1 to 7, characterized in that: The following steps are included: S1: using a first driving cylinder (16) and a second driving cylinder (17) to move the first driving bracket (13) and the second driving bracket (14) inwards respectively until each outer cylinder driving mechanism is in driving connection with the outer grinding cylinder (2); S2: Open the feed valve (82) and pump the pulp to be refined in the pulp pool to the pulping chamber (44) through the pulp pump; S3: starting the inner drum drive motor (61) to drive the inner grinding drum (4) to rotate forward, and the rotating spiral blades (45) break up the paper pulp to be ground in the beating chamber (44), and squeeze it into the first refining gap (71) through the filter screen (43) of the first discharge port (42), thereby obtaining coarse pulp; S4: starting each outer cylinder driving motor (51) to drive the outer grinding cylinder (2) to rotate in reverse, and the coarse pulp enters the second grinding gap (72) through the second discharge port (31) to obtain fine pulp; S5: Open the discharge valve (84) to discharge the material.

9. A waste paper pulping method according to claim 8, characterized in that: The step S2 further includes opening the feed valve (82) and closing the discharge valve (84), and pumping the paper pulp to be ground in the pulp pool to the pulping chamber (44) through the pulp pump until the pulping chamber (44) is fully filled; The step S4 further comprises: after the beating chamber (44), the first refining gap (71) and the second refining gap (72) are filled with pulp, closing the feed valve (82); The S5 step further comprises: opening the discharge valve (84) to discharge the material after 5 to 15 minutes, closing the discharge valve (84) after the pulp in the second refining gap (72) is discharged, opening the feed valve (82) again until the second refining gap (72) is refilled with pulp, closing the feed valve (82), and opening the discharge valve (84) to discharge the material after 5 to 15 minutes, and repeating the cycle.

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