A production process for waste paper recycled corrugated core paper with improved pulping

Abstract

The present invention relates to the field of waste paper recycling, and specifically to a waste paper recycling corrugated core paper production process with improved pulping, wherein the pulping equipment comprises a fixed inner cylinder, a fixed outer cylinder, a rotating inner cylinder and a gravity inner cylinder, a pulp drop channel is formed between the fixed inner cylinder and the fixed outer cylinder, the gravity inner cylinder is coaxially arranged in the fixed inner cylinder, the rotating inner cylinder is coaxially arranged in the gravity inner cylinder, a pulping gap is formed between the gravity inner cylinder and the rotating inner cylinder, a lifting mechanism for driving the gravity inner cylinder to move vertically is provided on the fixed inner cylinder, a plurality of extrusion members are evenly arranged on the side wall of the gravity inner cylinder around its circumferential direction, and a trigger member contacting the extrusion member is provided at a position corresponding to the extrusion member on the fixed inner cylinder, the present invention lifts the gravity inner cylinder by the lifting mechanism, thereby increasing the pulping gap formed between the gravity inner cylinder and the rotating inner cylinder, and at the same time squeezes the pulp by the extrusion member to decompose large-particle pulp clumps, thereby allowing the pulp to flow normally in the pulping gap, thereby improving the pulping efficiency.

Description

Technical Field

[0001] The invention relates to the field of waste paper recycling, and in particular to a production process for waste paper recycled corrugated core paper with improved pulping. Background Art

[0002] In the papermaking process, in order to make the pulp fibers finer, the pulp needs to be refined by a pulping machine. The existing pulping machine grinds the pulp by a rotating movable grinding disc and a fixed fixed grinding disc. The size of the contact surface between the movable grinding disc and the fixed grinding disc determines the refining speed of the pulping machine. 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 movable grinding disc, and a need for a motor drive with a larger torque. The structure is complex and the cost is high. Moreover, the pulping machine in the prior art has only one refining process, and the refining is uneven. It is often necessary to set up two pulping machines for coarse grinding and fine grinding of 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 particles of pulp clumps are easy to get stuck in the movable grinding disc, the refining process is not smooth, and the grinding disc wears a lot.

[0003] The currently disclosed Chinese patent CN115852726A discloses a waste paper pulping machine and pulping method, which includes 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, and the inner grinding cylinder is rotatably mounted inside the middle grinding cylinder. The outer grinding cylinder driving mechanism is connected to the outer grinding cylinder by transmission, and the inner barrel driving mechanism is connected to the inner grinding cylinder by transmission. The rotation direction of the outer grinding cylinder is opposite to that of the inner grinding cylinder. The upper part of the inner grinding cylinder is provided with a feed port, and the lower part of the inner grinding cylinder is provided with a feed port. A first discharge port is provided at the top of the inner grinding cylinder, which is connected with the middle grinding cylinder; a second discharge port is provided at the upper part of the middle grinding cylinder, which is connected with the outer grinding cylinder; a third discharge port is provided at the lower part of the outer grinding cylinder; a first refining gap is provided between the inner grinding cylinder and the middle grinding cylinder, and the first refining gap gradually decreases from bottom to top; a second refining gap is provided between the middle grinding cylinder and the outer grinding cylinder, and the second refining gap gradually decreases from top to bottom; the first refining gap is larger than the second refining gap; a beating chamber is provided inside the inner grinding cylinder, and beating blades are provided on the inner wall of the inner grinding cylinder.

[0004] According to the above patent, the patent first breaks up the large particles in the pulp through the beating blades to prevent jamming during refining. The refining process is smooth. When a large particle pulp mass enters the second refining gap and is blocked, the middle grinding cylinder rotates with the outer grinding cylinder driven by the large particle pulp mass. Under the gravity of the middle grinding cylinder itself, the large particle pulp mass decomposes and the middle grinding cylinder returns to a relatively static state, thereby completely eliminating blockage and jamming. However, the patent has limited ability to decompose large particle pulp by the gravity of the middle grinding cylinder itself, and is only suitable for relatively loose pulp accumulation. For dense or severely stuck pulp, it may not be effectively decomposed and will still cause jamming. It takes a certain amount of time to achieve the effect of decomposition by its own gravity. For situations where the jamming problem needs to be quickly solved during the production process, it may cause production delays. Therefore, there is a need for a refining equipment that can quickly prevent blockage. Summary of the Invention

[0005] In response to the problems existing in the existing technology, a waste paper recycled corrugated core paper production process with improved pulping is provided. The present invention increases the refining gap formed between the gravity inner cylinder and the rotating inner cylinder by lifting the gravity inner cylinder through a lifting mechanism. At the same time, the pulp is squeezed by an extrusion member to decompose large-particle pulp clumps, thereby allowing the pulp to flow normally in the refining gap and improving the refining efficiency.

[0006] To solve the problems of the prior art, the present invention provides a process for producing corrugated medium paper from waste paper with improved pulping, comprising the following steps:

[0007] The paper shredding step involves cutting the recycled waste paper into thin strips using a strip cutter to obtain strips of waste paper;

[0008] a pulping step, wherein the strips of waste paper are put into a pulping barrel, recycled water is injected into the pulping barrel, the strips of waste paper are broken into pulp, and the pulp in the pulping barrel is diverted to obtain waste paper pulp;

[0009] In the impurity removal step, the waste paper pulp is sequentially transported to various levels of deslagging equipment, and after multiple deslagging treatments, the primary pulp is obtained;

[0010] A refining step, wherein the primary pulp is transported to a refining device for refining;

[0011] In the concentration step, the refined slurry is collected and first screened through various levels of screening equipment to obtain pure refined slurry;

[0012] The pulping step is to transport the purified refined pulp to the pulping station for pulping to obtain papermaking pulp;

[0013] In the forming step, the papermaking pulp is transported to the wire papermaking station of the paper production line, formed by the wire papermaking station, and transported forward through the wire to obtain a wet paper pulp layer;

[0014] The wet pulp layer is transported to a drying device for drying to obtain corrugated paper;

[0015] The paper rolling step is to roll the corrugated core paper into a roll;

[0016] Among them, the refining equipment in the refining step has a rotating inner cavity, a refining gap and a pulp drop channel located outside the rotating inner cavity. The refining gap is connected to the rotating inner cavity, and the pulp drop channel is connected to the refining gap. The primary pulp first enters the rotating inner cavity to break up the large particles in the pulp to form a coarsely ground pulp and enters the refining gap for grinding; the pulp moves from bottom to top in the refining gap until it enters the pulp drop channel and is discharged; the refining gap is in a gradually shrinking state from bottom to top, and when the coarsely ground pulp enters the refining gap, the coarsely ground pulp is in a refining state gradually tending towards finely ground pulp.

[0017] Preferably, the refining equipment includes a fixed inner cylinder, a fixed outer cylinder, a rotating inner cylinder and a gravity inner cylinder, the fixed inner cylinder is coaxially arranged in the fixed outer cylinder, a pulp outlet is provided at the bottom of the fixed outer cylinder, a pulp drop channel is formed between the fixed inner cylinder and the fixed outer cylinder, the gravity inner cylinder is coaxially arranged in the fixed inner cylinder, the rotating inner cylinder is coaxially arranged in the gravity inner cylinder, a refining gap is formed between the gravity inner cylinder and the rotating inner cylinder, a spiral blade is provided in the rotating inner cylinder, the gravity inner cylinder can rotate in the fixed inner cylinder and can move vertically, a lifting mechanism for driving the gravity inner cylinder to move vertically is provided on the fixed inner cylinder, a plurality of extrusion parts are evenly arranged on the side wall of the gravity inner cylinder around its circumferential direction, a strip opening for the extrusion part to enter its interior is opened on the gravity inner cylinder, a strip frame for installing the extrusion part is fixedly provided in the strip opening, a trigger part contacting with the extrusion part is provided at the position corresponding to the extrusion part on the fixed inner cylinder, and when the gravity inner cylinder moves upward, the extrusion part is in a state of extruding the slurry under the guidance of the trigger part.

[0018] Preferably, the refining gap is in a state of gradually shrinking from bottom to top, and when the coarsely ground slurry enters the refining gap, the coarsely ground slurry is in a refining state gradually tending towards the finely ground slurry.

[0019] Preferably, a pressure sensor is provided at the position of the top of the fixed inner cylinder corresponding to the strip frame, an end block extends upward from the top of the strip frame, and the inner wall of the fixed inner cylinder is provided with a limiting groove for the end block to rotate and slide. The pressure sensor is located in the limiting groove and on the side away from the end block. A pressure rod is provided between the pressure sensor and the end block, and a compression spring is fixedly connected between the pressure rod and the pressure sensor.

[0020] Preferably, the lifting mechanism is provided with a lifting slide and an arc track, a slide groove is provided on the fixed inner cylinder along its axial direction, the lifting slide groove is slidably arranged in the slide groove, a threaded sleeve is provided on the lifting slide and located on the outside of the fixed inner cylinder, the arc track is fixedly arranged on the outside of the gravity inner cylinder, and an arc slider extending toward the inner side of the fixed inner cylinder is provided on the lifting slide and is slidably engaged with the arc track. When the refining gap is blocked, the gravity inner cylinder rotates with the rotating inner cylinder, and the arc track is in a state of rotating and sliding relative to the arc slider.

[0021] Preferably, the extrusion piece is a bar structure, the upper end of the extrusion piece is rotatably connected to the bar frame, and the upper end of the bar frame is provided with a shaft rod rotatably connected to the extrusion piece.

[0022] Preferably, the trigger is a ring structure, which is sleeved on the gravity inner cylinder. A groove is provided on the outer side of the middle part of the extrusion member. When the gravity inner cylinder is not lifted, the trigger is embedded in the groove. A positioning pin is provided on the fixed inner cylinder for fixing the trigger. When the gravity inner cylinder is lifted, the lower half of the extrusion member is pushed inward through the trigger member.

[0023] Preferably, the inner surface of the extrusion piece is provided with a rubber membrane, the rubber membrane is fixed and tightly connected to the strip frame, and the inner surface of the rubber membrane is also provided with an anti-wear layer.

[0024] Preferably, a coaxial top ring is fixedly provided on the top of the gravity inner cylinder, and the top of the top ring has a slope that slopes downward from the inside to the outside.

[0025] Preferably, a sealing ring sleeve is fixedly provided on the outer side of the fixed inner cylinder, a sealed space is formed between the fixed inner cylinder and the sealing ring sleeve, and the lifting mechanism is located in the sealed space.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. The present invention increases the refining gap between the gravity inner cylinder and the rotating inner cylinder by lifting the gravity inner cylinder through the lifting mechanism, and simultaneously squeezes the pulp through the extrusion member to decompose large-particle pulp clumps, thereby allowing the pulp to flow normally in the refining gap, achieving rapid pulp grinding, improving refining efficiency, and preventing blockage.

[0028] 2. The present invention reduces the refining gap from large to small, so that the pulp gradually tends from a coarse grinding state to a fine grinding state, ensuring the fine grinding of the pulp, effectively meeting the production standards, realizing the molding of papermaking pulp, and ensuring the production quality of paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a three-dimensional structural diagram of a production process of corrugated medium paper made from waste paper with improved pulping.

[0030] Figure 2 The present invention is a partial three-dimensional structural cross-sectional view of a production process of corrugated medium paper made from waste paper with improved pulping.

[0031] Figure 3 The present invention is a planar cross-sectional view of a production process for corrugated medium paper made from recycled waste paper with improved pulping.

[0032] Figure 4 The invention discloses a three-dimensional cross-sectional view of a gravity inner cylinder and a rotating inner cylinder in a production process of corrugated core paper made from waste paper with improved pulping.

[0033] Figure 5 The invention is a three-dimensional structural diagram of a lifting mechanism, an extruding member and a triggering member of a production process of corrugated medium paper made from recycled waste paper by improving pulping.

[0034] Figure 6 yes Figure 4 A magnified schematic diagram of .

[0035] Figure 7 yes Figure 4 Enlarged schematic diagram of point B.

[0036] Figure 8 The present invention is a schematic diagram showing the state of the gravity inner cylinder from normal to lifted in the production process of corrugated medium paper made from recycled waste paper with improved pulping.

[0037] Figure 9 The present invention is a partial three-dimensional structural cross-sectional view of a fixed inner cylinder, a gravity inner cylinder and a rotating inner cylinder in a production process of corrugated core paper recycled from waste paper with improved pulping.

[0038] Figure 10 yes Figure 9 Enlarged schematic diagram of point C.

[0039] The numbers in the figure are: 1. Fixed inner cylinder; 11. Limiting groove; 12. Sliding groove; 13. Sealing ring sleeve; 2. Fixed outer cylinder; 21. Slurry outlet; 22. Slurry drop channel; 3. Rotating inner cylinder; 31. Refining gap; 32. Spiral blade; 4. Gravity inner cylinder; 41. Strip mouth; 411. Strip frame; 4111. Shaft rod; 412. End block; 42. Top ring; 5. Lifting mechanism; 51. Lifting slide; 511. Threaded pipe sleeve; 52. Arc track; 521. Arc slider; 6. Extrusion part; 61. Groove; 62. Rubber membrane; 621. Anti-wear layer; 7. Trigger part; 71. Positioning pin; 8. Pressure sensor; 81. Pressure rod; 811. Compression spring. DETAILED DESCRIPTION

[0040] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] A process for producing corrugated medium paper from waste paper with improved pulping, comprising the following steps:

[0042] The paper shredding step involves cutting the recycled waste paper into thin strips using a strip cutter to obtain strips of waste paper;

[0043] a pulping step, wherein the strips of waste paper are put into a pulping barrel, recycled water is injected into the pulping barrel, the strips of waste paper are broken into pulp, and the pulp in the pulping barrel is diverted to obtain waste paper pulp;

[0044] In the impurity removal step, the waste paper pulp is sequentially transported to various levels of deslagging equipment, and after multiple deslagging treatments, the primary pulp is obtained;

[0045] A refining step, wherein the primary pulp is transported to a refining device for refining;

[0046] In the concentration step, the refined slurry is collected and first screened through various levels of screening equipment to obtain pure refined slurry;

[0047] The pulping step is to transport the purified refined pulp to the pulping station for pulping to obtain papermaking pulp;

[0048] In the forming step, the papermaking pulp is transported to the wire papermaking station of the paper production line, formed by the wire papermaking station, and transported forward through the wire to obtain a wet paper pulp layer;

[0049] The wet pulp layer is transported to a drying device for drying to obtain corrugated paper;

[0050] The paper rolling step is to roll the corrugated core paper into a roll;

[0051] Among them, the refining equipment in the refining step has a rotating inner cavity, a refining gap 31 located outside the rotating inner cavity and a pulp drop channel 22. The refining gap 31 is connected to the rotating inner cavity, and the pulp drop channel 22 is connected to the refining gap 31. The primary pulp first enters the rotating inner cavity to break up the large particles in the pulp to form a coarsely ground pulp and enters the refining gap 31 for grinding; the pulp moves from bottom to top in the refining gap 31 until it enters the pulp drop channel 22 and is discharged; the refining gap 31 is in a gradually shrinking state from bottom to top, and when the coarsely ground pulp enters the refining gap 31, the coarsely ground pulp is in a refining state gradually tending towards finely ground pulp.

[0052] See also Figures 1-4As shown, the pulping equipment includes a fixed inner cylinder 1, a fixed outer cylinder 2, a rotating inner cylinder 3 and a gravity inner cylinder 4. The fixed inner cylinder 1 is coaxially arranged in the fixed outer cylinder 2. The bottom of the fixed outer cylinder 2 is provided with a pulp outlet 21. The pulp drop channel 22 is formed between the fixed inner cylinder 1 and the fixed outer cylinder 2. The gravity inner cylinder 4 is coaxially arranged in the fixed inner cylinder 1. The rotating inner cylinder 3 is coaxially arranged in the gravity inner cylinder 4. The inner cavity of the rotating inner cylinder 3 constitutes the rotating inner cavity. The pulping gap 31 is formed between the gravity inner cylinder 4 and the rotating inner cylinder 3. The rotating inner cylinder 3 is provided with a spiral blade 32. The gravity inner cylinder 4 can The fixed inner cylinder 1 rotates and can move vertically. A lifting mechanism 5 is provided on the fixed inner cylinder 1 for driving the gravity inner cylinder 4 to move vertically. A plurality of extrusion members 6 are evenly arranged on the side wall of the gravity inner cylinder 4 around its circumferential direction. A strip opening 41 for the extrusion member 6 to enter the interior is opened on the gravity inner cylinder 4. A strip frame 411 for the extrusion member 6 to be installed is fixedly provided in the strip opening 41. A trigger member 7 in contact with the extrusion member 6 is provided at a position corresponding to the extrusion member 6 on the fixed inner cylinder 1. When the gravity inner cylinder 4 moves upward, the extrusion member 6 is in a state of extruding slurry under the guidance of the trigger member 7.

[0053] A bearing is connected between the rotating inner cylinder 3 and the fixed inner cylinder 1 , and the rotating inner cylinder 3 is driven to rotate by a rotary driver, which is not shown in the figure.

[0054] As the pulp is put into the rotating inner cylinder 3, the spiral blades 32 in the rotating inner cylinder 3 first break up the large particles in the pulp to form coarsely ground pulp to prevent jamming during refining. Then the coarsely ground pulp enters the refining gap 31 formed between the gravity inner cylinder 4 and the rotating inner cylinder 3 under pressure. The coarsely ground pulp is ground by the rotation of the rotating inner cylinder 3. The coarsely ground pulp moves from bottom to top in the refining gap 31 until it is discharged from the refining gap 31, completing the grinding of the pulp and forming refined ground pulp. The refined ground pulp then enters the pulp drop channel 22 and is finally discharged through the pulp outlet 21.

[0055] When the rotating inner cylinder 3 rotates, the gravity inner cylinder 4 is relatively stationary. When the pulp in the refining gap 31 is clogged, the gravity inner cylinder 4 rotates with the rotating inner cylinder 3 driven by the pulp. At this time, the gravity cylinder is driven upward by the lifting mechanism 5, so that the gap of the clogged part of the refining gap 31 is increased. At the same time, the extruder 6 is pushed inward by the trigger member 7, thereby squeezing the pulp and decomposing large particles of pulp clumps, thereby solving the problem of blockage in the refining gap 31 and allowing the pulp to flow upward normally. The lifting mechanism 5 then resets the gravity inner cylinder 4, the rotating inner cylinder 3 continues to rotate, and the gravity inner cylinder 4 returns to a relatively stationary state, thereby eliminating blockage and jamming and improving stability.

[0056] See also Figure 3As shown, the refining gap 31 is in a state of gradually shrinking from bottom to top. After the coarsely ground slurry enters the refining gap 31, the coarsely ground slurry is in a refining state gradually tending towards finely ground slurry.

[0057] As the pulp enters the refining gap 31, the rotation of the rotating inner cylinder 3 and the cooperation of the gravity inner cylinder 4 grind the pulp. The pulp is gradually pushed upward under the thrust. As the refining gap 31 gradually shrinks, the coarsely ground pulp gradually tends to finely ground pulp, making the paper pulp reach a finer state, which is beneficial to improving the quality of paper.

[0058] See also Figure 4 、 Figure 9 and Figure 10 As shown, a pressure sensor 8 is provided at the position of the top of the fixed inner cylinder 1 corresponding to the strip frame 411, and an end block 412 extends upward from the top of the strip frame 411. A limiting groove 11 is provided on the inner wall of the fixed inner cylinder 1 for the end block 412 to rotate and slide. The pressure sensor 8 is located in the limiting groove 11 and on the side away from the end block 412. A pressure rod 81 is provided between the pressure sensor 8 and the end block 412, and a compression spring 811 is fixedly connected between the pressure rod 81 and the pressure sensor 8.

[0059] The pressure sensor 8 is used to monitor the rotation of the gravity inner cylinder 4. When the refining gap 31 is blocked, the gravity inner cylinder 4 rotates with the rotating inner cylinder 3. At this time, the end block 412 squeezes the pressure rod 81, and the compression spring 811 between the pressure rod 81 and the pressure sensor 8 is compressed accordingly. After the pressure sensor 8 senses that the pressure has reached the specified range, it immediately controls the lifting mechanism 5 to lift the gravity inner cylinder 4, so that the refining gap 31 increases. At the same time, the extrusion member 6 squeezes the pulp. As the bottom of the gravity inner cylinder 4 moves away from the bottom of the fixed inner cylinder 1, the friction force decreases. At this time, the compression spring 811 returns to normal, and the pressure rod 81 pushes the end block 412, so that the gravity inner cylinder 4 rotates and resets. Then the lifting mechanism 5 moves the gravity inner cylinder 4 down to its original position, and the pulp flows normally in the refining gap 31.

[0060] See also Figure 3 、 Figure 4 、 Figure 5 and Figure 8 As shown, the lifting mechanism 5 is provided with a lifting slide 51 and an arc track 52. A slide groove 12 is opened on the fixed inner cylinder 1 along its axial direction. The lifting slide 51 is slidably set in the slide groove 12. A threaded sleeve 511 is provided on the lifting slide 51 and located on the outside of the fixed inner cylinder 1. The arc track 52 is fixedly set on the outside of the gravity inner cylinder 4. An arc slider 521 is extended toward the inner side of the fixed inner cylinder 1 on the lifting slide 51 and is slidably engaged with the arc track 52. When the refining gap 31 is blocked, the gravity inner cylinder 4 rotates with the rotating inner cylinder 3, and the arc track 52 is in a state of rotating and sliding relative to the arc slider 521.

[0061] The threaded sleeve 511 is connected to a screw driver which is not shown in the figure. When the screw driver is started, the lifting slide 51 moves along the slide groove 12 .

[0062] When the pulp in the refining gap 31 is clogged, the gravity inner cylinder 4 rotates with the rotating inner cylinder 3 driven by the pulp. At this time, the arc track 52 rotates relative to the arc slider 521. Since the arc track 52 is supported on the arc slider 521, the upward movement of the lifting slide 51 can lift the gravity inner cylinder 4. The arc track 52 and the arc slider 521 are in a sliding state, which does not affect the vertical movement of the gravity inner cylinder 4.

[0063] See also Figure 3-Figure 7 As shown, the extrusion member 6 is a bar structure, the upper end of the extrusion member 6 is rotatably connected to the bar frame 411 , and the upper end of the bar frame 411 is provided with a shaft 4111 rotatably connected to the extrusion member 6 .

[0064] When the extrusion member 6 is acted upon by the trigger member 7, the extrusion member 6 is pushed inward. At this time, the extrusion member 6 swings around the shaft 4111 as the axis, thereby squeezing the large-particle pulp mass through the extrusion member 6 to decompose the pulp mass and prevent the refining gap 31 from being blocked.

[0065] See also Figure 3-Figure 7 As shown, the trigger member 7 is a ring structure, which is sleeved on the gravity inner cylinder 4. A groove 61 is provided on the outer side of the middle part of the extrusion member 6. When the gravity inner cylinder 4 is not lifted, the trigger member 7 is embedded in the groove 61. A positioning pin 71 for fixing the trigger member 7 is provided on the fixed inner cylinder 1. When the gravity inner cylinder 4 is lifted, the lower half of the extrusion member 6 is pushed inward through the trigger member 7.

[0066] When the gravity inner cylinder 4 is in a stationary state, the trigger member 7 is embedded in the groove 61 provided on the extrusion member 6. As the gravity inner cylinder 4 is lifted, the extrusion member 6 moves upward accordingly. The trigger member 7 is in a stationary state fixed by the positioning pin 71. At this time, the groove 61 is separated from the trigger member 7, and the groove 61 gradually comes to the top of the trigger member 7. The extrusion member 6 moves along the surface of the trigger member 7, and the extrusion member 6 is thereby pushed out by the trigger member 7, achieving the effect of the extrusion member 6 swinging inward. When the gravity inner cylinder 4 is reset, the groove 61 on the extrusion member 6 is re-stuck on the trigger member 7.

[0067] See also Figure 7 As shown, a rubber membrane 62 is provided on the inner surface of the extrusion member 6 . The rubber membrane 62 is fixedly and tightly connected to the strip frame 411 . An anti-wear layer 621 is also provided on the inner surface of the rubber membrane 62 .

[0068] The rubber film 62 provided on the surface of the extrusion member 6 has a good sealing effect. The rubber film 62 is elastic and flexible, and can well fill the gap between the strip frame 411 and the extrusion member 6 to prevent the slurry from flowing out of the gap between the strip frame 411 and the extrusion member 6. The anti-wear layer 621 on the surface of the rubber film 62 prevents the rubber film 62 from being worn during the grinding process, thereby achieving a protective effect.

[0069] See also Figure 3 As shown, a coaxial top ring 42 is fixedly provided on the top of the gravity inner cylinder 4, and the top of the top ring 42 has a slope that slopes downward from the inside to the outside.

[0070] The top ring 42 on the top of the gravity inner cylinder 4 has a drainage effect, so that the refined slurry is introduced into the slurry drop channel 22. Since a pressure sensor 8 is provided at the bottom of the gravity inner cylinder 4, the top ring 42 also has a shielding effect to prevent the slurry from affecting the detection of the pressure sensor 8.

[0071] See also Figure 3 As shown, a sealing ring sleeve 13 is fixedly provided on the outer side of the fixed inner cylinder 1 , and a sealed space is formed between the fixed inner cylinder 1 and the sealing ring sleeve 13 , and the lifting mechanism 5 is located in the sealed space.

[0072] When the refined slurry flows down the slurry drop channel 22 along the sealing ring sleeve 13 , the sealing ring sleeve 13 protects the lifting mechanism 5 , preventing the refined slurry from affecting the operation of the lifting mechanism 5 .

[0073] The present invention increases the refining gap 31 formed between the gravity inner cylinder 4 and the rotating inner cylinder 3 by lifting the gravity inner cylinder 4 through the lifting mechanism 5, and at the same time squeezes the pulp through the squeezing member 6 to decompose large-particle pulp clumps, thereby allowing the pulp to flow normally in the refining gap 31, thereby improving the refining efficiency and preventing blockage.

[0074] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A process for producing corrugated medium paper from waste paper with improved pulping, characterized in that: The following steps are involved: The paper shredding step involves cutting the recycled waste paper into thin strips using a strip cutter to obtain strips of waste paper; a pulping step, wherein the strips of waste paper are put into a pulping barrel, recycled water is injected into the pulping barrel, the strips of waste paper are broken into pulp, and the pulp in the pulping barrel is diverted to obtain waste paper pulp; In the impurity removal step, the waste paper pulp is sequentially transported to various levels of deslagging equipment, and after multiple deslagging treatments, the primary pulp is obtained; A refining step, wherein the primary pulp is transported to a refining device for refining; In the concentration step, the refined slurry is collected and first screened through various levels of screening equipment to obtain pure refined slurry; The pulping step is to transport the purified refined pulp to the pulping station for pulping to obtain papermaking pulp; In the forming step, the papermaking pulp is transported to the wire papermaking station of the paper production line, formed by the wire papermaking station, and transported forward through the wire to obtain a wet paper pulp layer; The wet pulp layer is transported to a drying device for drying to obtain corrugated paper; The paper rolling step is to roll the corrugated core paper into a roll; In the refining step, The pulping equipment comprises a fixed inner cylinder (1), a fixed outer cylinder (2), a rotating inner cylinder (3) and a gravity inner cylinder (4); The fixed inner cylinder (1) is coaxially arranged in the fixed outer cylinder (2); a pulp outlet (21) is provided at the bottom of the fixed outer cylinder (2); and a pulp drop channel (22) is formed between the fixed inner cylinder (1) and the fixed outer cylinder (2); The gravity inner cylinder (4) is coaxially arranged in the fixed inner cylinder (1), and the rotating inner cylinder (3) is coaxially arranged in the gravity inner cylinder (4). The inner cavity of the rotating inner cylinder (3) constitutes a rotating inner cavity. A refining gap (31) is formed between the gravity inner cylinder (4) and the rotating inner cylinder (3). A spiral blade (32) is provided in the rotating inner cylinder (3). The gravity inner cylinder (4) is capable of rotating in the fixed inner cylinder (1) and of moving vertically. The fixed inner cylinder (1) is provided with a lifting mechanism (5) for driving the gravity inner cylinder (4) to move vertically. The side wall of the gravity inner cylinder (4) is evenly provided with a plurality of extrusion members (6) around its circumference. The gravity inner cylinder (4) is provided with a strip opening (41) for the extrusion members (6) to enter the interior thereof. A strip frame (411) for installing the extrusion members (6) is fixedly provided in the strip opening (41). A triggering member (7) in contact with the extruding member (6) is provided at a position on the fixed inner cylinder (1) corresponding to the extruding member (6); when the gravity inner cylinder (4) moves upward, the extruding member (6) is in a state of extruding slurry under the guidance of the triggering member (7); The pulping equipment comprises a rotating inner cavity, a pulping gap (31) located outside the rotating inner cavity, and a pulping channel (22); the pulping gap (31) is communicated with the rotating inner cavity, and the pulping channel (22) is communicated with the pulping gap (31); primary pulp first enters the rotating inner cavity to break up large particles in the pulp to form coarse pulp, which then enters the pulping gap (31) for grinding; the pulp moves from bottom to top in the pulping gap (31) until it enters the pulping channel (22) and is discharged; the pulping gap (31) is in a state of gradually shrinking from bottom to top, and when the coarse pulp enters the pulping gap (31), the coarse pulp is in a pulping state gradually tending towards fine pulp; A pressure sensor (8) is provided at a position corresponding to the strip frame (411) at the top of the fixed inner cylinder (1); an end block (412) extends upward from the top of the strip frame (411); a limiting groove (11) for the end block (412) to rotate and slide is provided on the inner wall of the fixed inner cylinder (1); the pressure sensor (8) is located in the limiting groove (11) and on a side away from the end block (412); a pressing rod (81) is provided between the pressure sensor (8) and the end block (412); and a compression spring (811) is fixedly connected between the pressing rod (81) and the pressure sensor (8).

2. The process for producing corrugated medium paper from waste paper with improved pulping according to claim 1, characterized in that: The lifting mechanism (5) is provided with a lifting slide (51) and an arc-shaped track (52); The fixed inner cylinder (1) is provided with a sliding groove (12) along its axial direction, the lifting slide (51) is slidably arranged in the sliding groove (12), and a threaded sleeve (511) is provided on the lifting slide (51) and located outside the fixed inner cylinder (1); The arc track (52) is fixedly arranged on the outer side of the gravity inner cylinder (4), and an arc slider (521) is provided on the lifting slide plate (51) extending toward the inner side of the fixed inner cylinder (1) and slidingly engaged with the arc track (52). When the refining gap (31) is blocked, the gravity inner cylinder (4) rotates following the rotating inner cylinder (3), and the arc track (52) is in a state of rotating and sliding relative to the arc slider (521).

3. The process for producing corrugated medium paper from waste paper with improved pulping according to claim 1, characterized in that: The extrusion member (6) is a bar structure, the upper end of the extrusion member (6) is rotatably connected to the bar frame (411), and the upper end of the bar frame (411) is provided with a shaft (4111) rotatably connected to the extrusion member (6).

4. The process for producing corrugated medium paper from waste paper with improved pulping according to claim 1, characterized in that: The trigger member (7) is a sleeve structure, and the trigger member (7) is sleeved on the gravity inner cylinder (4). A groove (61) is provided on the outer side of the middle part of the extrusion member (6). When the gravity inner cylinder (4) is not lifted, the trigger member (7) is in a state of being embedded in the groove (61). A positioning pin (71) for fixing the trigger member (7) is provided on the fixed inner cylinder (1). When the gravity inner cylinder (4) is lifted, the lower half of the extrusion member (6) is in a state of being pushed inward through the trigger member (7).

5. The process for producing corrugated medium paper from waste paper with improved pulping according to claim 4, characterized in that: The inner surface of the extrusion piece (6) is provided with a rubber membrane (62), the rubber membrane (62) is fixedly and tightly connected to the strip frame (411), and the inner surface of the rubber membrane (62) is also provided with an anti-wear layer (621).

6. The process for producing corrugated medium paper from waste paper with improved pulping according to claim 1, characterized in that: A coaxial top ring (42) is fixedly provided on the top of the gravity inner cylinder (4), and the top of the top ring (42) has a slope that slopes downward from the inside to the outside.

7. The process for producing corrugated medium paper from waste paper with improved pulping according to claim 1, characterized in that: A sealing ring sleeve (13) is fixedly provided on the outer side of the fixed inner cylinder (1), a sealed space is formed between the fixed inner cylinder (1) and the sealing ring sleeve (13), and the lifting mechanism (5) is located in the sealed space.

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