Crushing mechanism for pulper

Abstract

The invention relates to the technical field of crushing mechanisms, and discloses a crushing mechanism for a pulper, the crushing mechanism is mounted in a pulping cylinder and driven to rotate in the pulping cylinder, the crushing mechanism comprises a paper shredding cutter and a transmission shaft, one end of the paper shredding cutter is fixedly connected to the transmission shaft, the transmission shaft is hollow and is provided with a suction assembly, and openings are formed in the side face and the bottom of the transmission shaft; the suction assembly drives paper pulp in the pulping cylinder to enter the transmission shaft from the opening in the side face and to be discharged from the opening in the bottom; when the suction assembly is used, paper pulp in the pulping cylinder is sucked into the transmission shaft through suction force, the paper pulp enters from the side opening of the transmission shaft, is discharged from the bottom opening, and passes through the paper shredding cutter in the flowing process, namely, the paper pulp is sucked into the side opening and is dragged to the paper shredding cutter at the same time; the contact efficiency of different parts of paper pulp and the paper shredding cutter is improved, the problem that part of paper pulp does not make contact with the crushing mechanism during flowing is solved, and the crushing efficiency of paper scraps in the paper pulp is improved.

Description

Technical Field

[0001] The invention relates to the technical field of crushing mechanisms, in particular to a crushing mechanism for a pulper. Background Art

[0002] A pulper is a piece of equipment used in the pulp and paper industry. It is mainly used to break down waste paper, cardboard and other raw materials into pulp. Its core function is to break down dry paper or wet paper into fibers so that it can be re-pulped for subsequent papermaking. Its main working steps are: feeding, screening, breaking up and discharging, and the breaking mechanism in the pulper is used to realize the breaking up steps.

[0003] For example, a patent with announcement number CN109082918B and announcement date January 29, 2021 discloses a multi-level pulp crusher for papermaking, which relates to the technical field of papermaking equipment, and includes a machine body, a feed port, a crushing chamber, a discharge port and a working motor, a crushing chamber is arranged inside the machine body, a feed port is arranged at the middle position of the upper part of the machine body, the feed port is connected with the crushing chamber, a discharge port is arranged at the bottom of the machine body, a discharge chamber is arranged above the discharge port, and the upper part of the discharge chamber is connected with the crushing chamber, a working motor is arranged at the upper left of the machine body, a sieve plate is movably arranged inside the discharge chamber, the working motor is fixedly welded to the upper part of the machine body, a first rotating shaft is fixedly welded to the right output shaft of the working motor, the first rotating shaft is arranged parallel to and directly above the feed port, a gear is arranged directly above the feed port, the gear is fixedly welded on the first rotating shaft, and a first The rack, the gear is meshed with the first rack, the lower end of the first rack passes through the feed port and extends to the top of the crushing chamber, two upper rolling rollers are symmetrically arranged on the top of the crushing chamber about the vertical central axis of the crushing chamber, a second rack is arranged between the upper rolling rollers, and the second rack is meshed with the upper rolling rollers on both sides, the upper end of the second rack is fixedly welded to the lower end of the first rack, and a plurality of rolling blades are evenly distributed circumferentially along the outer edge of the upper rolling roller, a first rotating wheel is fixedly welded to the right end of the first rotating shaft, a second rotating wheel is arranged at the lower right side of the machine body, and the second rotating wheel is arranged directly below the first rotating wheel, the first rotating wheel and the second rotating wheel are connected by a conveyor belt, a worm is fixedly welded to the left end of the second rotating wheel, a lower crushing assembly is arranged at the bottom of the crushing chamber, the left end of the worm passes through the bottom of the right side wall of the machine body, extends to the bottom of the crushing chamber, and is fixedly welded to the lower crushing assembly.

[0004] In the prior art, the crushing mechanism in the pulper is driven to rotate in the pulping tube, and the crushing mechanism crushes the pulp by the shear force generated during the rotation. Although the rotation of the crushing mechanism drives the pulp to flow in the pulping tube, some of the pulp does not contact the crushing mechanism when flowing, that is, it is not affected by the shear force and cannot be crushed, thereby affecting the crushing effect of the pulp. Summary of the invention

[0005] The object of the present invention is to provide a crushing mechanism for a pulper to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a crushing mechanism for a pulper, which is installed inside a pulping cylinder and driven to rotate inside the pulping cylinder, the crushing mechanism includes a shredder and a transmission shaft, one end of the shredder is fixedly connected to the transmission shaft, the interior of the transmission shaft is hollow, and a suction component is installed, and openings are provided on the side and the bottom, the suction component drives the pulp in the pulping cylinder to enter the transmission shaft from the opening on the side, and be discharged from the opening at the bottom.

[0007] Preferably, a driving mechanism is installed on the pulping cylinder, and the driving mechanism drives the transmission shaft to rotate in the pulping cylinder.

[0008] Preferably, the suction assembly comprises a blade, which is installed inside the transmission shaft and located above the bottom opening.

[0009] Preferably, the driving mechanism includes a driving motor and a gear set, the output shaft of the driving motor is connected to the gear set, and the gear set is connected to the transmission shaft.

[0010] Preferably, a defoaming assembly is installed on the transmission shaft, and a liquid outlet pipe is connected to the bottom. The defoaming assembly is used to introduce the foam on the surface of the pulp into the interior of the transmission shaft, and close the side opening and bottom opening of the transmission shaft. The introduced foam is discharged from the liquid outlet pipe.

[0011] Preferably, the transmission shaft includes an outer shaft and an inner shaft, the outer shaft is sleeved on the outer wall of the inner shaft, and the inner shaft is slidably connected to the outer shaft, the inner shaft has a first position and a second position in the outer shaft, when the inner shaft is in the first position, the side opening and the bottom opening of the transmission shaft are both in an open state, and are in a closed state with the liquid outlet pipe, when the inner shaft is in the second position, the side opening and the bottom opening of the transmission shaft are both in a closed state, and are in an open state with the liquid outlet pipe.

[0012] Preferably, a slide groove is provided inside the outer shaft, the groove direction of the slide groove is consistent with the axial direction of the outer shaft, and a sliding block is provided on the outer wall of the inner shaft. The sliding block is located in the slide groove and forms a sliding guide fit with the slide groove.

[0013] Preferably, the defoaming assembly includes a conduit and a foam removing piece, the lower end of the conduit is fixedly connected to the upper end of the inner shaft, and one end of the foam removing piece is fixedly connected to the outer wall of the conduit.

[0014] Preferably, an electric push rod is also provided on the top of the pulping cylinder, a telescopic shaft at the output end of the electric push rod passes through the pulping cylinder, a plurality of brackets are provided at the top opening of the conduit, and the telescopic shaft at the output end of the electric push rod is rotatably connected to the brackets.

[0015] Preferably, when the inner shaft is in the second position, the catheter floats on the liquid surface while following the rotation of the inner shaft.

[0016] The beneficial effect of the present invention is that in the above technical scheme, the suction component of the present invention sucks the pulp in the pulping cylinder into the drive shaft by suction during use, and the pulp enters from the side opening of the drive shaft and is discharged from the bottom opening. In the process of flowing, it passes through the shredder, that is, the side opening sucks the pulp while also dragging the pulp toward the shredder, thereby improving the contact efficiency between different parts of the pulp and the shredder, avoiding the problem that part of the pulp does not contact the crushing mechanism when flowing, and improving the efficiency of crushing paper sheets in the pulp. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of a crushing mechanism provided in an embodiment of the present invention;

[0019] Figure 2 An internal cross-sectional view of a crushing mechanism provided by an embodiment of the present invention;

[0020] Figure 3 The embodiment of the present invention provides Figure 1 A in the enlarged view;

[0021] Figure 4 The embodiment of the present invention provides Figure 2 The enlarged view of point B in the figure;

[0022] Figure 5 The embodiment of the present invention provides Figure 2 Enlarged view of point C in the figure.

[0023] Description of reference numerals:

[0024] 1. pulping cylinder; 11. liquid outlet pipe; 2. crushing mechanism; 21. shredder; 22. transmission shaft; 221. outer shaft; 222. inner shaft; 223. hole; 224. slide groove; 225. slider; 23. suction assembly; 231. blade; 24. branch pipe; 25. first valve; 26. second valve; 27. defoaming assembly; 271. conduit; 272. defoaming piece; 273. bracket; 274. electric push rod; 275. telescopic section; 276. trigger rod; 277. sleeve; 278. protrusion; 3. driving mechanism; 31. driving motor; 32. gear set. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1-5 As shown, an embodiment of the present invention provides a crushing mechanism for a pulper, which is installed inside a pulping tube 1 and driven to rotate inside the pulping tube 1. The crushing mechanism 2 includes a shredder 21 and a transmission shaft 22. One end of the shredder 21 is fixedly connected to the transmission shaft 22. The transmission shaft 22 is hollow inside and is equipped with a suction component 23. The side and bottom are both provided with openings. The suction component 23 drives the pulp in the pulping tube 1 to enter the transmission shaft 22 from the side opening and be discharged from the bottom opening.

[0028] Specifically, the pulping cylinder 1 is a cylindrical structure with a hollow interior, the pulping cylinder 1 is arranged vertically, a feed port is provided at the top of the pulping cylinder 1, a discharge port is provided at the bottom, and a crushing mechanism 2 is installed inside the pulping cylinder 1. In this embodiment, the crushing mechanism 2 includes a transmission shaft 22 and a shredder 21, the transmission shaft 22 is vertically installed inside the pulping cylinder 1, the central axis of the transmission shaft 22 is colinear with the central axis of the pulping cylinder 1, the upper and lower ends of the transmission shaft 22 are rotatably connected to the inside of the pulping cylinder 1, and a driving mechanism 3 is installed on the pulping cylinder 1, and the driving mechanism 3 drives the transmission shaft 22 in the pulping cylinder 1. The transmission shaft 22 is self-rotating, and the interior of the transmission shaft 22 is hollow and provided with a side opening and a bottom opening. The interior of the transmission shaft 22 is connected with the internal chamber of the pulping tube 1 through the side opening and the bottom opening. A suction assembly 23 is installed inside the transmission shaft 22. The suction assembly 23 is used to suck the pulp in the pulping tube 1 from the side opening into the interior of the transmission shaft 22 and discharge it from the bottom opening. In this embodiment, the suction assembly 23 includes a blade 231, which is installed inside the transmission shaft 22 and located above the bottom opening. The blade 231 can be a spiral blade or an axial flow blade.

[0029] In actual use, the raw material of pulp is fed into the chamber inside the pulping tube 1 from the top feed port of the pulping tube 1, and then the driving mechanism 3 drives the transmission shaft 22 to rotate inside the pulping tube 1. The rotation of the transmission shaft 22 drives the shredder 21 to rotate inside the pulping tube 1. The paper scraps in the pulp are shredded by the rotation of the shredder 21, thereby improving the uniformity of the paper scraps in the pulp. At the same time, the rotation of the transmission shaft 22 will also synchronously drive the blades 231 to rotate. Because the transmission shaft 22 has a side opening, the pulp enters the transmission shaft 22 before the transmission shaft 22 rotates. When the blades 231 rotate, the rotation of the blades 231 will apply an axial thrust to the pulp, that is, a downward thrust to the pulp, driving The pulp is made to flow from top to bottom in the drive shaft 22, and the side opening of the drive shaft 22 generates suction, which sucks the pulp in the pulping tube 1 into the drive shaft 22 and discharges it from the bottom opening of the drive shaft 22, so as to realize the top-down circulation of the pulp in the pulping tube 1. The suction of the pulp through the side opening can drive the pulp to flow to the side close to the drive shaft 22, and pass through the shredder 21 during the flow. It can be understood that the side opening sucks the pulp while dragging the pulp toward the shredder 21, thereby improving the contact efficiency between different parts of the pulp and the shredder 21, avoiding the problem that part of the pulp does not contact the crushing mechanism 2 when flowing, and improving the crushing efficiency of paper sheets in the pulp.

[0030] In an optional embodiment, preferably, the driving mechanism 3 includes a driving motor 31 and a gear set 32 ​​, the output shaft of the driving motor 31 is connected to the gear set 32 ​​, and the gear set 32 ​​is connected to the transmission shaft 22 .

[0031] Specifically, the driving mechanism 3 is installed at the bottom of the pulping cylinder 1, and the lower end of the transmission shaft 22 extends from the inside of the pulping cylinder 1. The gear set 32 ​​includes a driving gear and a driven gear. The driving gear is rotatably installed at the bottom of the pulping cylinder 1. The output shaft of the driving motor 31 is connected to the driving gear through a transmission belt. The driven gear is sleeved on one end of the transmission shaft 22 extending from the pulping cylinder 1. The driving gear is meshed with the driven gear. Two branch pipes 24 are also installed at the bottom of the transmission shaft 22 located in the pulping cylinder 1. The branch pipes 24 are fixedly connected to the outer wall of the transmission shaft 22 and communicated with the inside of the transmission shaft 22. The opening of the branch pipe 24 is the bottom opening of the transmission shaft 22 in the above embodiment, that is, the opening at the bottom of the transmission shaft 22 for discharging pulp. When the driving motor 31 is driven, the driving gear at the output end is driven to rotate, and the driven gear is driven to rotate synchronously. The driven gear drives the transmission shaft 22 to rotate synchronously. The rotation of the transmission shaft 22 drives the paper shredder 21 to revolve in the pulping cylinder 1 to achieve the crushing of paper scraps in the pulp.

[0032] In the existing pulp production process, the generation of foam is a common phenomenon, which is mainly caused by factors such as organic matter, chemical additives and mechanical stirring in the pulp. However, if these foams are not removed, it will not only reduce production efficiency but also affect product quality. Therefore, in another embodiment of the present invention, a defoaming assembly 27 is installed on the transmission shaft 22, and the bottom of the transmission shaft 22 is connected to a liquid outlet pipe 11, and the liquid outlet pipe 11 is rotatably sleeved on the transmission shaft 22 in a dynamic seal. The defoaming assembly 27 is used to introduce the foam on the surface of the pulp into the interior of the transmission shaft 22, and close the side opening and bottom opening of the transmission shaft 22, and the introduced foam is discharged from the liquid outlet pipe 11.

[0033] Specifically, the defoaming assembly 27 is connected to the transmission shaft 22 and rotates synchronously with the defoaming assembly 27. When the paper scraps in the pulp are crushed, the defoaming assembly 27 is immersed in the pulp to prevent the foam generated on the liquid surface from entering the transmission shaft 22. When the defoaming work is performed, the defoaming assembly 27 is driven to rise in the pulping cylinder 1, that is, the defoaming assembly 27 rises from the inside of the pulp to the liquid surface, and transports the foam to the inside of the transmission shaft 22 as the defoaming assembly 27 rotates.

[0034] More specifically, the transmission shaft 22 includes an outer shaft 221 and an inner shaft 222. The outer shaft 221 is sleeved on the outer wall of the inner shaft 222, and the inner shaft 222 is slidably connected to the outer shaft 221. The inner shaft 222 has a first position and a second position in the outer shaft. When the inner shaft 222 is in the first position, the side opening and the bottom opening of the transmission shaft 22 are both in an open state, and are in a closed state with the liquid outlet pipe 11. When the inner shaft 222 is in the second position, the side opening and the bottom opening of the transmission shaft 22 are both in a closed state, and are in an open state with the liquid outlet pipe 11.

[0035] Specifically, the outer shaft 221 and the inner shaft 222 are both arranged vertically, and the central axes of the two are in line. The lower end of the outer shaft 221 is rotatably connected to the pulping cylinder 1, and the upper end is rotatably connected to the pulping cylinder 1 through the defoaming component 27. The sides of the inner shaft 222 and the outer shaft 221 are both provided with holes 223. When the holes 223 between the two are connected, they are combined to form a side opening of the transmission shaft 22. The inner shaft 222 and the outer shaft 221 are both arranged vertically, and the central axes of the two are in line. The first valve 25 is provided inside the branch pipe 24, and the bottom of the transmission shaft 22 and the communication with the liquid outlet pipe 11 are A second valve 26 is provided at the inner shaft 222, and the first valve 25 and the second valve 26 are both electrically controlled valves. This is a prior art and will not be described in detail. One end of the shredder 21 is fixedly connected to the outer shaft 221, and the blade 231 is fixedly installed inside the inner shaft 222. The driving motor 31 is connected to the outer shaft 221 through a gear set 32. A slide groove 224 is provided on the inner wall of the outer shaft 221, and the groove direction of the slide groove 224 is consistent with the axial direction of the outer shaft 221. A slider 225 is provided on the outer wall of the inner shaft 222, and the slider 225 is located in the slide groove 224 and forms a sliding guide with the slide groove 224.

[0036] When the pulp is crushed, the inner shaft 222 is in the first position, and the holes 223 between the inner shaft 222 and the outer shaft 221 are connected to each other, that is, the side opening of the transmission shaft 22 is open at this time, and the first valve 25 is opened, and the second valve 26 is closed. At this time, in the process of the driving mechanism 3 driving the transmission shaft 22 to rotate, due to the axial opening of the inner slide groove 224 of the outer shaft 221, the inner shaft 222 can rotate synchronously with the outer shaft 221, that is, the rotation of the blade 231 causes the side opening of the transmission shaft 22 to generate suction, and the suction sucks the pulp in the pulping tube 1 into the transmission shaft 22, and discharges it from the branch pipe 24 at the bottom of the transmission shaft 22, and the discharged pulp flows into the pulping tube 1 again, and enters the transmission shaft 22 again in the subsequent process, and reciprocates in this way;

[0037] When defoaming the pulp, the inner shaft 222 is in the second position, the defoaming assembly 27 is driven to rise, and drives the inner shaft 222 to slide and rise inside the outer shaft 221, the hole 223 on the inner shaft 222 and the hole 223 on the outer shaft 221 are staggered with each other, and the shaft body of the inner shaft 222 seals and blocks the hole 223 on the outer shaft 221. At this time, the pulp in the pulping tube 1 cannot enter the inner shaft 222 through the hole 223, that is, it cannot enter the transmission shaft 22. It can be understood that the side opening of the transmission shaft 22 is in a closed state at this time, and the first valve 25 is closed, and the second valve 26 is opened. When the defoaming component 27 is driven to rise to the liquid surface of the pulp, the foam enters the inner shaft 222, that is, enters the interior of the transmission shaft 22, driven by the defoaming component 27. Due to the side opening of the transmission shaft 22 and the closing of the first valve 25, the foam entering the interior of the transmission shaft 22 will not enter the interior of the pulp. Due to the opening of the second valve 26, the foam in the transmission shaft 22 enters the liquid outlet pipe 11 and is discharged from the interior of the liquid outlet pipe 11. The discharged foam can be collected by an external collecting device. By discharging the foam, it can be prevented that organic matter, chemical additives, etc. in the foam are dissolved into the pulp.

[0038] In an optional embodiment, preferably, the defoaming assembly 27 includes a conduit 271 and a defoaming piece 272 , wherein the lower end of the conduit 271 is fixedly connected to the upper end of the inner shaft 222 , and one end of the defoaming piece 272 is fixedly connected to the outer wall of the conduit 271 .

[0039] Specifically, Figure 1As shown, the conduit 271 is a funnel-shaped structure, the interior of the conduit 271 is connected to the interior of the inner shaft 222, the foam-removing piece 272 is an arc-shaped structure, and an electric push rod 274 is also provided on the top of the pulping cylinder 1. The telescopic shaft at the output end of the electric push rod 274 penetrates the pulping cylinder 1, and a plurality of brackets 273 are provided at the top opening of the conduit 271. The telescopic shaft at the output end of the electric push rod 274 is rotatably connected to the bracket 273, and the upper end of the outer shaft 221 is rotatably connected to the pulping cylinder through the conduit 271 and the electric push rod 274. In actual use, that is, from the pulping process to the defoaming process, the conduit 271 can be driven to rise in the pulping cylinder 1 by the contraction of the telescopic shaft at the output end of the electric push rod 274, and the rise of the conduit 271 drives the inner shaft 222 to slide and rise inside the outer shaft 221, that is, the inner shaft 222 moves from the first position to the second position. In the second position, the side opening of the transmission shaft 22 is closed, the first valve 25 is closed, and the second valve 26 is opened. At this time, the driving mechanism 3 drives the transmission shaft 22 to rotate and drive The movable duct 271 and the foam-removing piece 272 rotate synchronously, and the electric push rod 274 remains stationary. Since the duct 271 is located at the liquid surface of the pulp, the upper end opening of the duct 271 is almost flush with the liquid surface of the pulp, and the arc-shaped setting of the foam-removing piece 272 gathers the foam toward the center during its revolution, that is, drives the foam to move toward the opening of the duct 271, and the foam enters the duct 271 and then enters the inner shaft 222, that is, enters the transmission shaft 22. At this time, the blades 231 inside the inner shaft 222 rotate to generate suction, so that the air in the pulping cylinder 1 enters the transmission shaft 22 through the duct 271 and is discharged from the liquid outlet pipe 11. As the air flows in the duct 271 and the transmission shaft 22, the flow of foam in the duct 271 and the inner shaft 222 can be accelerated, avoiding the accumulation of foam in the transmission shaft 22 or the duct 271 due to poor foam fluidity. Finally, the foam in the transmission shaft 22 flows into the liquid outlet pipe 11 and is discharged from the liquid outlet pipe 11.

[0040] In an optional embodiment, preferably, when the inner shaft 222 is in the second position, the conduit 271 floats on the liquid surface while following the rotation of the inner shaft 222 .

[0041] Specifically, when the conduit 271 rises to the liquid surface of the pulp, the conduit 271 is driven to float up and down on the liquid surface. It can be understood that the conduit 271 is initially located at the liquid surface. During its up and down floating process, the conduit 271 descends and is immersed in the pulp. At this time, part of the pulp enters the conduit 271 and flows into the inner shaft 222. Since the fluidity of the foam is very poor, during the process of the conduit 271 and the foam stripper 272 rotating to remove foam, when the foam enters the conduit 271 and the inner shaft 222, the floating and sinking of the conduit 271 can make part of the pulp enter the conduit 271 and the inner shaft 222, and flow inside the conduit 271 and the transmission shaft 22. The flow of the pulp can drive the foam to flow inside the conduit 271 and the inner shaft 222, thereby preventing the foam from staying on the inner wall of the conduit 271 or the inner shaft 222 and affecting the subsequent pulp crushing.

[0042] More specifically, in this embodiment, the electric push rod 274 can drive the conduit 271 to float up and down when the inner shaft 222 is in the second position, that is, when the conduit 271 is at the liquid surface, that is, the small extension and contraction of the telescopic shaft at the output end of the electric push rod 274 drives the conduit 271 to float on the liquid surface, so as to introduce part of the pulp into the conduit 271 during the defoaming process. Since the fluidity of pulp is stronger than the fluidity of foam, the introduction of pulp can assist the flow of foam in the conduit 271 and the inner shaft 222, so that the foam can be smoothly discharged from the liquid outlet pipe 11. Although some pulp will be wasted in the process, the overall quality of the pulp in the pulping tube 1 can be improved.

[0043] In an optional embodiment, preferably, a trigger rod 276 is provided on the bracket 273, and a mounting sleeve 277 is installed on the inner top of the pulping cylinder 1. The upper end of the sleeve 277 is fixedly connected to the inner wall of the pulping cylinder 1, and a protrusion 278 is provided on the lower end surface. The trigger rod 276 and the lower end surface of the sleeve 277 form a limiting abutment fit, and the telescopic shaft at the output end of the electric push rod 274 is located inside the sleeve 277, and a telescopic section 275 is provided on the telescopic shaft at the output end of the electric push rod 274.

[0044] Specifically, the bracket 273 is provided with three groups, such as Figure 1 As shown, three groups of brackets 273 are arranged in a herringbone shape at the top opening of the conduit 271, and one end of the three groups of brackets 273 is fixedly connected to the inner wall of the conduit 271, and the other ends of the three groups of brackets 273 are connected to each other. The telescopic shaft at the output end of the electric push rod 274 is rotatably connected to the connection between the three groups through the telescopic section 275. The central axis of the sleeve 277 is colinear with the central axis of the transmission shaft 22, and the trigger rod 276 is vertically arranged on one of the groups of brackets 273, as shown in FIG. Figure 5As shown, the protrusion 278 is an arc-shaped structure, and the telescopic section 275 is composed of two connecting shafts and a sleeve shaft. The sleeve shaft is located between the two connecting shafts, and the interior of one connecting shaft is hollow. One end of the sleeve shaft extends into the interior of one connecting shaft and is slidably connected with the connecting shaft. The other end of the sleeve shaft is fixedly connected to the other connecting shaft, and a spring is also provided inside the sleeve shaft. This elastic telescopic mechanism is a prior art and will not be described in detail.

[0045] In actual use, when the inner shaft 222 is in the first position, the telescopic section 275 is in a natural state, and the guide tube 271 is immersed in the pulp;

[0046] When the inner shaft 222 moves from the first position to the second position, the contraction of the electric push rod 274 drives the guide tube 271 to rise, and drives the inner shaft 222 to rise synchronously. The rise of the guide tube 271 drives the bracket 273 and the trigger rod 276 thereon to rise synchronously.

[0047] When the guide tube 271 is located on the water surface, that is, after the inner shaft 222 moves to the second position, the upper end of the trigger rod 276 contacts the lower end surface of the sleeve 277, and then when the driving mechanism 3 drives the transmission shaft 22 to rotate, the guide tube 271 rotates synchronously with the transmission shaft 22, and the rotation of the guide tube 271 drives the trigger rod 276 to revolve, that is, the trigger rod 276 revolves around the central axis of the guide tube 271. Because the central axis of the guide tube 271 is in line with the central axis of the transmission shaft 22 and the central axis of the sleeve 277, the trigger rod 276 revolves around the central axis of the sleeve 277. Therefore, when the trigger rod 276 revolves, its upper end will be in contact with the lower end surface of the sleeve 277 and slide. When passing through the protrusion 278 of the arc structure during the sliding process, the protrusion 278 forces the trigger rod 276 to revolve during the process of orbiting. The telescopic section 275 is forced to stretch, the bracket 273 and the conduit 271 are forced to descend, and the inner shaft 222 is driven to descend synchronously. At this time, the descending amplitude of the inner shaft 222 is small, so the amplitude is not enough to make the inner shaft 222 descend to the first position, that is, the hole 223 on the inner shaft 222 will not be connected with the hole 223 on the outer shaft 221, and the side opening of the transmission shaft 22 will not be opened. As the conduit 271 descends slightly, part of the pulp in the pulping tube 1 enters the conduit 271 and flows inside the conduit 271 and the inner shaft 222. Because the fluidity of the pulp is stronger than the fluidity of the foam, the introduction of the pulp can assist the flow of the foam in the conduit 271 and the inner shaft 222, so that the foam can be smoothly discharged from the liquid outlet pipe 11.

[0048] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A crushing mechanism for a pulper, installed inside a pulping cylinder (1) and driven to rotate inside the pulping cylinder (1), the crushing mechanism (2) comprising a shredder (21) and a transmission shaft (22), one end of the shredder (21) being fixedly connected to the transmission shaft (22), characterized in that: The interior of the transmission shaft (22) is hollow and is provided with a suction assembly (23). The sides and the bottom are provided with openings. The suction assembly (23) drives the pulp in the pulping cylinder (1) to enter the transmission shaft (22) from the side openings and is discharged from the bottom openings.

2. A crushing mechanism for a pulper according to claim 1, characterized in that: A driving mechanism (3) is installed on the pulping cylinder (1), and the driving mechanism (3) drives the transmission shaft (22) to rotate inside the pulping cylinder (1).

3. A crushing mechanism for a pulper according to claim 1, characterized in that: The suction assembly (23) comprises a blade (231) which is installed inside the transmission shaft (22) and is located above the bottom opening.

4. A crushing mechanism for a pulper according to claim 1, characterized in that: The driving mechanism (3) comprises a driving motor (31) and a gear set (32); the output shaft of the driving motor (31) is connected to the gear set (32), and the gear set (32) is connected to the transmission shaft (22).

5. A crushing mechanism for a pulper according to claim 1, characterized in that: A defoaming assembly (27) is installed on the transmission shaft (22), and a liquid outlet pipe (11) is connected to the bottom thereof. The defoaming assembly (27) is used to introduce the foam on the surface of the pulp into the interior of the transmission shaft (22), and close the side opening and the bottom opening of the transmission shaft (22), and the introduced foam is discharged from the liquid outlet pipe (11).

6. A crushing mechanism for a pulper according to claim 5, characterized in that: The transmission shaft (22) comprises an outer shaft (221) and an inner shaft (222); the outer shaft (221) is sleeved on the outer wall of the inner shaft (222), and the inner shaft (222) is slidably connected to the outer shaft (221); the inner shaft (222) has a first position and a second position in the outer shaft (221); when the inner shaft (222) is in the first position, the side opening and the bottom opening of the transmission shaft (22) are both in an open state, and are in a closed state with the liquid outlet pipe (11); when the inner shaft (222) is in the second position, the side opening and the bottom opening of the transmission shaft (22) are both in a closed state, and are in an open state with the liquid outlet pipe (11).

7. A crushing mechanism for a pulper according to claim 6, characterized in that: A slide groove (224) is provided inside the outer shaft (221), and the groove direction of the slide groove (224) is consistent with the axial direction of the outer shaft (221). A slider (225) is provided on the outer wall of the inner shaft (222), and the slider (225) is located in the slide groove (224) and forms a sliding guide with the slide groove (224).

8. A crushing mechanism for a pulper according to claim 6, characterized in that: The foam removal assembly (27) comprises a conduit (271) and a foam removal piece (272), wherein the lower end of the conduit (271) is fixedly connected to the upper end of the inner shaft (222), and one end of the foam removal piece (272) is fixedly connected to the outer wall of the conduit (271).

9. A crushing mechanism for a pulper according to claim 8, characterized in that: An electric push rod (274) is also provided at the top of the pulping cylinder (1), and a telescopic shaft at the output end of the electric push rod (274) penetrates the pulping cylinder (1). A plurality of brackets (273) are provided at the top opening of the conduit (271), and the telescopic shaft at the output end of the electric push rod (274) is rotatably connected to the brackets (273).

10. A crushing mechanism for a pulper according to claim 8, characterized in that: When the inner shaft (222) is in the second position, the guide tube (271) floats on the liquid surface while following the rotation of the inner shaft (222).

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