A shredding mechanism for a pulper

Abstract

The application relates to the technical field of crushing mechanisms, and discloses a crushing mechanism for a pulper, which is installed in the interior of a pulper and rotates under the drive of the pulper. The crushing mechanism comprises a paper crushing cutter and a transmission shaft. One end of the paper crushing cutter is fixedly connected to the transmission shaft. The transmission shaft is hollow in the interior and is provided with a suction assembly. The side surface and the bottom of the transmission shaft are both provided with openings. The suction assembly drives the paper pulp in the pulper to enter the transmission shaft from the side surface openings and to be discharged from the bottom openings. In the use process of the suction assembly, the paper pulp in the pulper is sucked into the transmission shaft through suction force. The paper pulp enters the transmission shaft from the side surface openings and is discharged from the bottom openings. The paper pulp passes through the paper crushing cutter in the flowing process. That is, the paper pulp is sucked from the side surface openings and is dragged to the paper crushing cutter at the same time. The contact efficiency of the paper pulp in different parts with the paper crushing cutter is improved. The problem that part of the paper pulp does not contact the crushing mechanism in the flowing process is avoided. The crushing efficiency of paper sheets in the paper pulp is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crushing mechanism, in particular to a crushing mechanism for a pulper. BACKGROUND

[0002] The pulper is a kind of equipment used in pulp and paper industry, mainly used for breaking down waste paper, paperboard and other raw materials into pulp, its core function is to decompose dry paper or wet paper into fibers, so as to be made into pulp again for subsequent papermaking, its main working steps are: feeding, screening, crushing and discharging, and the crushing mechanism in the pulper is to realize the crushing step.

[0003] As the patent with publication number CN109082918B and publication date of January 29, 2021, discloses a multi-level paper pulp crusher for papermaking, relating to the technical field of papermaking equipment, which comprises a machine body, a feeding port, a crushing cavity, a discharge port and a working motor, the crushing cavity is arranged inside the machine body, the feeding port is arranged at the upper middle position of the machine body, the feeding port is communicated with the crushing cavity, the discharge port is arranged below the machine body, the discharge cavity is arranged above the discharge port, the discharge cavity is communicated with the crushing cavity above, the working motor is arranged at the upper left of the machine body, the sieve plate is movably arranged inside the discharge cavity, the working motor is fixedly welded on the upper part of the machine body, the first rotating shaft is fixedly welded on the output shaft of the working motor on the right side, the first rotating shaft is arranged in parallel above the feeding port, the gear is arranged above the feeding port, the gear is fixedly welded on the first rotating shaft, the first rack is arranged behind the gear, the gear is engaged with the first rack, the lower end of the first rack penetrates through the feeding port and extends to the top of the crushing cavity, two upper crushing rollers are symmetrically arranged on the top of the crushing cavity about the vertical central axis of the crushing cavity, the second rack is arranged between the upper crushing rollers, the second rack is engaged with the upper crushing rollers on both sides, the upper end of the second rack is fixedly welded on the lower end of the first rack, a plurality of crushing blades are uniformly distributed on the outer periphery of the upper crushing roller, the first rotating shaft is fixedly welded with the first rotating wheel on the right end, the second rotating wheel is arranged below the first rotating wheel on the right side of the machine body, the first rotating wheel and the second rotating wheel are communicated through the conveyor belt, the second rotating wheel is fixedly welded with the worm on the left end, the lower crushing assembly is arranged at the bottom of the crushing cavity, the worm extends to the bottom of the crushing cavity through the right side wall of the machine body and is fixedly welded with the lower crushing assembly on the left end.

[0004] In the prior art, the crushing mechanism in the pulper is driven to rotate in the pulping cylinder, and the crushing mechanism breaks the pulp by shearing force generated during rotation. Although the rotation of the crushing mechanism drives the pulp to flow in the pulping cylinder, part of the pulp may not contact the crushing mechanism during flow, that is, it is not affected by the shearing force and cannot be broken, thereby affecting the crushing effect of the pulp. SUMMARY

[0005] The present application aims to provide a shredding mechanism for a pulper to solve the above problems in the prior art.

[0006] To achieve the above object, the present application provides the following technical solution: A shredding mechanism for a pulper, which is installed inside a pulper cylinder and rotates driven by the pulper cylinder, and comprises a shredding blade and a transmission shaft, one end of the shredding blade being fixedly connected to the transmission shaft, the transmission shaft being hollow inside and being provided with a suction assembly on the side and bottom, the suction assembly driving the paper pulp in the pulper cylinder to enter the transmission shaft from the side opening and to be discharged from the bottom opening.

[0007] Preferably, a driving mechanism is installed on the pulper cylinder to drive the transmission shaft to rotate in the pulper cylinder.

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

[0009] Preferably, the driving mechanism comprises a driving motor and a gear set, the output shaft of the driving motor being connected to the gear set, and the gear set being 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 being used to guide the foam on the surface of the paper pulp into the transmission shaft, and to close the side opening and the bottom opening of the transmission shaft, the guided foam being discharged from the liquid outlet pipe.

[0011] Preferably, the transmission shaft comprises an outer shaft and an inner shaft, the outer shaft being sleeved on the outer wall of the inner shaft, and the inner shaft being slidingly connected to the outer shaft, the inner shaft having 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 the liquid outlet pipe is in a closed state, 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 the liquid outlet pipe is in an open state.

[0012] Preferably, a sliding groove is formed in the inner shaft, the groove direction of the sliding groove being consistent with the axial direction of the outer shaft, and a sliding block is arranged on the outer wall of the inner shaft, the sliding block being located in the sliding groove and being in sliding guide cooperation with the sliding groove.

[0013] Preferably, the defoaming assembly comprises a guide pipe and a defoaming piece, the lower end of the guide pipe being fixedly connected to the upper end of the inner shaft, and one end of the defoaming piece being fixedly connected to the outer wall of the guide pipe.

[0014] Preferably, an electric push rod is further arranged on the top of the pulper cylinder, the telescopic shaft of the output end of the electric push rod penetrating through the pulper cylinder, a plurality of supports being arranged on the top opening of the guide pipe, and the telescopic shaft of the output end of the electric push rod being rotatably connected to the supports.

[0015] Preferably, when the inner shaft is in the second position, the conduit floats on the liquid surface while rotating with the inner shaft.

[0016] The beneficial effects of the present invention are as follows: In the above technical solution, the suction component of the present invention draws the pulp in the pulping cylinder into the drive shaft through suction during use. The pulp enters from the side opening of the drive shaft and exits from the bottom opening. During the flow, it passes through the shredder. That is, while the side opening draws in the pulp, it also drags the pulp toward the shredder, which improves the contact efficiency between different parts of the pulp and the shredder. This avoids the problem that some parts of the pulp do not come into contact with the crushing mechanism during the flow, and improves the crushing efficiency of paper pieces in the pulp. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

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

[0019] Figure 2 This is an internal sectional view of the crushing mechanism provided in an embodiment of the present invention;

[0020] Figure 3 Provided for embodiments of the present invention Figure 1 Enlarged view of point A in the image;

[0021] Figure 4 Provided for embodiments of the present invention Figure 2 Enlarged view of point B in the image;

[0022] Figure 5 Provided for embodiments of the present invention Figure 2 Enlarged view of point C in the image.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Pulping cylinder; 11. Discharge pipe; 2. Crushing mechanism; 21. Shredder; 22. Drive 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. Foam remover; 273. Support; 274. Electric push rod; 275. Telescopic section; 276. Trigger rod; 277. Sleeve; 278. Protrusion; 3. Drive mechanism; 31. Drive motor; 32. Gear set. Detailed Implementation

[0025] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings.

[0026] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is 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 positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation and be operated, therefore it cannot be understood as a limitation on the present application. In the description of the present application, it is necessary to explain that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0027] As Figures 1-5 As shown in the figure, the present application provides a kind of broken mechanism for pulper, is installed in the inside of pulper 1, and is driven to rotate in pulper 1, broken mechanism 2 includes paper cutter 21 and transmission shaft 22, one end of paper cutter 21 is fixedly connected to transmission shaft 22, the inside of transmission shaft 22 is hollow, and is equipped with suction assembly 23, and the side and bottom are all equipped with opening, suction assembly 23 drives the paper pulp in pulper 1 from the opening in side into transmission shaft 22, and is discharged from the opening in bottom.

[0028] Specifically, the pulping cylinder 1 is a hollow cylinder structure, the pulping cylinder 1 is vertically arranged, the top of the pulping cylinder 1 is provided with a feeding port, the bottom of the pulping cylinder 1 is provided with a discharging port, the crushing mechanism 2 is installed in the interior of the pulping cylinder 1, in this embodiment, the crushing mechanism 2 includes a transmission shaft 22 and a paper cutting knife 21, the transmission shaft 22 is vertically installed in the interior of the pulping cylinder 1, the central axis of the transmission shaft 22 is collinear with the central axis of the pulping cylinder 1, the upper and lower ends of the transmission shaft 22 are both rotationally connected to the interior of the pulping cylinder 1, and the pulping cylinder 1 is provided with a driving mechanism 3, the driving mechanism 3 drives the transmission shaft 22 to rotate in the pulping cylinder 1, the interior of the transmission shaft 22 is hollow, and is provided with a side opening and a bottom opening, the interior of the transmission shaft 22 is communicated with the interior cavity of the pulping cylinder 1 through the side opening and the bottom opening, the interior of the transmission shaft 22 is provided with a suction assembly 23, the suction assembly 23 is used for sucking the paper pulp in the pulping cylinder 1 into the interior of the transmission shaft 22 through the side opening, and discharging the paper pulp from the bottom opening, in this embodiment, the suction assembly 23 includes a blade 231, the blade 231 is installed in the interior of the transmission shaft 22 and is 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 the paper pulp is fed into the cavity in the interior of the pulping cylinder 1 from the top feeding port of the pulping cylinder 1, then the driving mechanism 3 drives the transmission shaft 22 to rotate in the pulping cylinder 1, the rotation of the transmission shaft 22 drives the paper cutting knife 21 to rotate in the pulping cylinder 1, and the paper cutting knife 21 is used for crushing the paper scraps in the paper pulp, thereby improving the uniformity of the paper scraps in the paper pulp, at the same time, the rotation of the transmission shaft 22 also drives the blade 231 to rotate, because the transmission shaft 22 has the side opening, so the paper pulp enters the interior of the transmission shaft 22 before the transmission shaft 22 rotates, when the blade 231 rotates, the rotation of the blade 231 applies an axial thrust to the paper pulp, that is, applies a downward thrust to the paper pulp, drives the paper pulp to flow from top to bottom in the transmission shaft 22, and causes the side opening of the transmission shaft 22 to have a suction force, the suction force sucks the paper pulp in the pulping cylinder 1 into the transmission shaft 22, and discharges the paper pulp from the bottom opening of the transmission shaft 22, so as to realize the circulation of the paper pulp in the pulping cylinder 1 from top to bottom, through the suction of the paper pulp through the side opening, the paper pulp can be driven to flow to the side close to the transmission shaft 22, and pass through the paper cutting knife 21 in the process of flowing, it can be understood that the suction of the paper pulp through the side opening also drags the paper pulp to the paper cutting knife 21, improves the contact efficiency of the paper pulp in different parts with the paper cutting knife 21, avoids the problem that part of the paper pulp does not contact the crushing mechanism 2 when flowing, and improves the crushing efficiency of the paper pieces in the paper 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 pulper 1, the lower end of the transmission shaft 22 extends out of the inside of the pulper 1, the gear set 32 comprises a driving gear and a driven gear, the driving gear is rotatably installed at the bottom of the pulper 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 the end of the transmission shaft 22 extending into the pulper 1, the driving gear is engaged with the driven gear, and the bottom of the part of the transmission shaft 22 located inside the pulper 1 is further provided with two branch pipes 24, the branch pipes 24 are fixedly connected to the outer wall of the transmission shaft 22 and communicate with the inside of the transmission shaft 22, and the openings of the branch pipes 24 are the bottom openings of the transmission shaft 22 in the above embodiment, that is, the openings of the transmission shaft 22 at the bottom for discharging the paper pulp, when the driving motor 31 is driven, the driving gear at the output end is driven to rotate, the driven gear is synchronously driven to rotate, the transmission shaft 22 is synchronously driven to rotate, and the paper cutter 21 is driven to revolve in the pulper 1, so that the paper scraps in the paper pulp are crushed.

[0032] In the existing paper pulp production process, the generation of foam is a common phenomenon, which is mainly caused by organic substances, chemical additives and mechanical stirring in the paper pulp, however, if the foam is not removed, it will not only reduce the production efficiency, but also affect the product quality, therefore, in another embodiment of the present application, the transmission shaft 22 is provided with a defoaming assembly 27, the transmission shaft 22 is provided with a liquid outlet pipe 11 at the bottom, the liquid outlet pipe 11 is rotatably and sealingly sleeved on the transmission shaft 22, and the defoaming assembly 27 is used for guiding the foam on the surface of the paper pulp into the inside of the transmission shaft 22 and closing the side opening and the bottom opening of the transmission shaft 22, and the guided foam is discharged from the liquid outlet pipe 11.

[0033] Specifically, the defoaming assembly 27 is connected to the transmission shaft 22 and synchronously rotates with the defoaming assembly 27, when the crushing work of the paper scraps in the paper pulp is performed, the defoaming assembly 27 is immersed in the paper pulp, so as to avoid the foam generated on the liquid surface from entering the inside of the transmission shaft 22, when the defoaming work is performed, the defoaming assembly 27 is driven to rise in the pulper 1, that is, the defoaming assembly 27 rises from the inside of the paper pulp to the liquid surface, and the foam is transported into the inside of the transmission shaft 22 with the rotation of the defoaming assembly 27.

[0034] More specifically, 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 slidingly 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 at the first position, the side opening and the bottom opening of the transmission shaft 22 are in an open state, and the liquid outlet pipe 11 is in a closed state, when the inner shaft 222 is at the second position, the side opening and the bottom opening of the transmission shaft 22 are in a closed state, and the liquid outlet pipe 11 is in an open state.

[0035] Specifically, the outer shaft 221 and the inner shaft 222 are vertically arranged, and the central axes of the two are collinear, the lower end of the outer shaft 221 is rotatably connected to the pulper 1, the upper end is rotatably connected to the pulper 1 through the defoaming assembly 27, the side surface of the inner shaft 222 and the outer shaft 221 is provided with a hole 223, and the holes 223 of the two are communicated to form a side opening of the transmission shaft 22, the inner shaft 222 and the outer shaft 221 are vertically arranged, and the central axes of the two are collinear, the inner shaft 222 is provided with a first valve 25, the bottom of the transmission shaft 22 and the communication part of the liquid outlet pipe 11 are provided with a second valve 26, the first valve 25 and the second valve 26 are electric control valves, which are not described in detail, one end of the paper cutter 21 is fixedly connected to the outer shaft 221, the blade 231 is fixedly installed in the inner shaft 222, the driving motor 31 is drivingly connected to the outer shaft 221 through the gear set 32, the inner wall of the outer shaft 221 is provided with a sliding groove 224, the groove direction of the sliding groove 224 is consistent with the axial direction of the outer shaft 221, the outer wall of the inner shaft 222 is provided with a sliding block 225, the sliding block 225 is located in the sliding groove 224 and forms a sliding guide cooperation with the sliding groove 224;

[0036] When the paper pulp is broken, the inner shaft 222 is in the first position, the holes 223 between the inner shaft 222 and the outer shaft 221 are communicated with each other, that is, the side opening of the transmission shaft 22 is in an open state at this time, and the first valve 25 is opened and the second valve 26 is closed at this time, in the process of driving the transmission shaft 22 to rotate by the driving mechanism 3, the inner shaft 222 can rotate synchronously with the outer shaft 221 due to the axial opening of the sliding groove 224 in the outer shaft 221, that is, the rotation of the blade 231 generates suction force on the side opening of the transmission shaft 22, the paper pulp in the pulper 1 is sucked into the transmission shaft 22, and is discharged from the branch pipe 24 at the bottom of the transmission shaft 22, and the discharged paper pulp flows into the pulper 1 again and enters the transmission shaft 22 again in the subsequent process, and so on;

[0037] When the defoaming work is carried out on the pulp, the inner shaft 222 is in the second position, the defoaming assembly 27 is driven to rise, and the inner shaft 222 is driven to slide up inside the outer shaft 221, the holes 223 on the inner shaft 222 and the holes 223 on the outer shaft 221 are staggered, the shaft body of the inner shaft 222 seals the holes 223 on the outer shaft 221, at this time, the pulp in the pulper 1 cannot enter into the inner shaft 222 through the holes 223, that is, cannot enter into the transmission shaft 22, it can be understood that the side opening of the transmission shaft 22 is in the closed state at this time, and the first valve 25 is closed and the second valve 26 is opened, when the defoaming assembly 27 is driven to rise to the liquid surface of the pulp, the foam enters into the inner shaft 222 under the drive of the defoaming assembly 27, that is, enters into the inside of the transmission shaft 22, because the side opening of the transmission shaft 22 and the first valve 25 are closed, the foam entering into the inside of the transmission shaft 22 cannot enter into the pulp, and because the second valve 26 is opened, the foam in the transmission shaft 22 enters into the outlet pipe 11 and is discharged from the inside of the outlet pipe 11, the discharged foam can be collected by the external collecting device, by discharging the foam, the organic substances and chemical additives in the foam can be prevented from dissolving into the pulp.

[0038] In the optional embodiment, preferably, the defoaming assembly 27 comprises a guide pipe 271 and a defoaming piece 272, the lower end of the guide pipe 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 guide pipe 271.

[0039] Specifically, as shown in FIG. 4, the defoaming assembly 27 comprises a guide pipe 271 and a defoaming piece 272, the lower end of the guide pipe 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 guide pipe 271. Figure 1As shown, the conduit 271 is in a funnel structure, the inside of the conduit 271 is communicated with the inside of the inner shaft 222, the defoaming piece 272 is in an arc structure, the top of the pulper 1 is further provided with an electric push rod 274, the telescopic shaft at the output end of the electric push rod 274 penetrates the pulper 1, the top opening of the conduit 271 is provided with a plurality of supports 273, the telescopic shaft at the output end of the electric push rod 274 is rotationally connected to the support 273, the upper end of the outer shaft 221 is rotationally connected to the pulper through the conduit 271 and the electric push rod 274, in the actual use process, i.e. from the pulping process to the defoaming process, the conduit 271 can be lifted in the pulper 1 through the contraction of the telescopic shaft at the output end of the electric push rod 274, the lifting of the conduit 271 drives the inner shaft 222 to slide and lift in the inside of the outer shaft 221, i.e. 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 synchronously drives the conduit 271 and the defoaming piece 272 to rotate, and the electric push rod 274 remains in a stationary state, since the conduit 271 is located at the liquid surface of the paper pulp, the upper end opening of the conduit 271 is nearly flush with the liquid surface of the paper pulp, and the defoaming piece 272 is arranged in an arc shape, in the process of revolution, the defoaming piece 272 converges the foam to the center, i.e. drives the foam to move to the opening of the conduit 271, the foam enters the inside of the conduit 271 and then enters the inside of the inner shaft 222, i.e. enters the inside of the transmission shaft 22, at this time, the blades 231 in the inside of the inner shaft 222 rotate to generate suction, so that the air in the pulper 1 enters the inside of the transmission shaft 22 through the conduit 271 and is discharged from the liquid outlet pipe 11, along with the flow of the air in the inside of the conduit 271 and the transmission shaft 22, the flow of the foam in the inside of the conduit 271 and the inner shaft 222 can be accelerated, so as to avoid the situation that the foam is accumulated in the inside of the transmission shaft 22 or the conduit 271 due to poor flowability, finally, the foam in the inside of the transmission shaft 22 flows to the inside of the liquid outlet pipe 11 and is discharged from the liquid outlet pipe 11.

[0040] In optional embodiments, 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 on the liquid surface, and during the floating process, the conduit 271 descends and is immersed into the pulp. At this time, part of the pulp enters the inside of the conduit 271 and flows into the inside of the inner shaft 222. Because the foam has very poor fluidity, when the foam enters the inside of the conduit 271 and the inner shaft 222 during the defoaming process of the rotation of the conduit 271 and the defoaming piece 272, the floating of the conduit 271 can make part of the pulp enter the inside of the conduit 271 and the inner shaft 222 and flow in the inside of the conduit 271 and the transmission shaft 22. The flow of the pulp can drive the flow of the foam in the inside of the conduit 271 and the inner shaft 222, avoiding the foam staying on the inner wall of the conduit 271 or the inner shaft 222 and affecting the subsequent pulp crushing;

[0042] More specifically, in the 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, the conduit 271 is located on the liquid surface. That is, the small amplitude extension and contraction of the extension and contraction 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 inside of the conduit 271 during the defoaming process. Because the fluidity of the pulp is stronger than that of the foam, the introduction of the pulp can assist the flow of the foam in the inside of the conduit 271 and the inner shaft 222, so that the foam can be smoothly discharged from the liquid outlet pipe 11. Although part of the pulp is wasted in the process, the overall quality of the pulp in the pulper 1 can be improved.

[0043] In an optional embodiment, preferably, the bracket 273 is provided with a trigger rod 276, and the inside top of the pulper 1 is provided with a sleeve 277. The upper end of the sleeve 277 is fixedly connected to the inner wall of the pulper 1, the lower end face is provided with a protrusion 278, the trigger rod 276 and the lower end face of the sleeve 277 form a limiting abutting cooperation, the extension and contraction shaft at the output end of the electric push rod 274 is located in the inside of the sleeve 277, and the extension and contraction shaft at the output end of the electric push rod 274 is provided with an extension and contraction section 275.

[0044] Specifically, the bracket 273 is provided with three groups, as shown in the figure. Figure 1 The three groups of brackets 273 are arranged in a herringbone shape at the top opening of the conduit 271, one end of the three groups of brackets 273 is fixedly connected to the inner wall of the conduit 271, the other end of the three groups of brackets 273 is connected to each other, the extension and contraction shaft at the output end of the electric push rod 274 is rotationally connected to the connection between the three groups through the extension and contraction section 275, the central axis of the sleeve 277 is collinear with the central axis of the transmission shaft 22, and the trigger rod 276 is arranged in a vertical manner on one of the three groups of brackets 273. Figure 5As shown, the protrusion 278 is in an arc structure, the telescopic section 275 is composed of two sections of connecting shafts and a sleeve shaft, the sleeve shaft is located between the two sections of connecting shafts, one section of connecting shafts is hollow inside, one end of the sleeve shaft extends into the section of connecting shafts and is in sliding connection with the section of connecting shafts, the other end of the sleeve shaft is fixedly connected to the other section of connecting shafts, and the inside of the sleeve shaft is further provided with a spring, the elastic telescopic mechanism is prior art and will not be described herein;

[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 conduit 271 is immersed in the pulp;

[0046] When the inner shaft 222 is moved from the first position to the second position, the contraction of the electric push rod 274 drives the conduit 271 to rise and synchronously drives the inner shaft 222 to rise, and the rising of the conduit 271 drives the bracket 273 and the trigger rod 276 thereon to synchronously rise;

[0047] When the conduit 271 is located on the water surface, i.e. after the inner shaft 222 is moved to the second position, the upper end of the trigger rod 276 abuts against the lower end surface of the sleeve 277, and then when the driving mechanism 3 drives the transmission shaft 22 to rotate, the conduit 271 rotates synchronously with the transmission shaft 22, and the rotation of the conduit 271 drives the trigger rod 276 to revolve, i.e. the trigger rod 276 revolves around the central axis of the conduit 271, and since the central axis of the conduit 271 is collinear 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, and thus the upper end of the trigger rod 276 slides along the lower end surface of the sleeve 277 during the revolution, and when the upper end of the trigger rod 276 passes the protrusion 278 of the arc structure during the sliding, the protrusion 278 forces the trigger rod 276 to descend during the revolution, and the telescopic section 275 is forced to stretch at this time, and the bracket 273 and the conduit 271 are forced to descend and synchronously drive the inner shaft 222 to descend, and thus the descending amplitude of the inner shaft 222 is small, and thus the amplitude is insufficient to make the inner shaft 222 descend to the first position, i.e. the hole 223 on the inner shaft 222 is not communicated with the hole 223 on the outer shaft 221, and the side opening of the transmission shaft 22 is not opened, and with the small amplitude of the conduit 271, part of the pulp in the pulper 1 enters the conduit 271 and flows in the conduit 271 and the inner shaft 222, and since the flowability of the pulp is stronger than that 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 only describes certain exemplary embodiments of the present application in a descriptive manner, and it is needless to say that those skilled in the art can modify the described embodiments in various manners without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A shredding mechanism for a pulper, which is installed inside a pulper cylinder (1) and is driven to rotate in the pulper cylinder (1), the shredding mechanism (2) comprising a shredding blade (21) and a driving shaft (22), one end of the shredding blade (21) being fixedly connected to the driving shaft (22), characterized in that, The transmission shaft (22) is internally hollow, and is provided with an opening on the side and the bottom, and is provided with a suction assembly (23). The suction assembly (23) drives the paper pulp in the pulper (1) to enter the transmission shaft (22) from the side opening and to be discharged from the bottom opening. The pulper (1) is provided with a driving mechanism (3). The driving mechanism (3) drives the transmission shaft (22) to rotate in the pulper (1). The suction assembly (23) comprises a blade (231). The blade (231) is arranged in the transmission shaft (22) and is located above the bottom opening. The transmission shaft (22) is provided with a defoaming assembly (27). The bottom is communicated with a liquid outlet pipe (11). The defoaming assembly (27) is used for guiding the foam on the surface of the paper pulp into the transmission shaft (22) and closing the side opening and the bottom opening of the transmission shaft (22). The guided foam is discharged from the liquid outlet pipe (11). The transmission shaft (22) comprises an outer shaft (221) and an inner shaft (222). The outer shaft (221) is arranged on the outer wall of the inner shaft (222) and 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 in an open state, and the liquid outlet pipe (11) is in a closed state. When the inner shaft (222) is in the second position, the side opening and the bottom opening of the transmission shaft (22) are in a closed state, and the liquid outlet pipe (11) is in an open state. The inner shaft (221) is provided with a sliding groove (224). The groove direction of the sliding groove (224) is consistent with the axial direction of the outer shaft (221). The outer wall of the inner shaft (222) is provided with a sliding block (225). The sliding block (225) is located in the sliding groove (224) and is in sliding guide cooperation with the sliding groove (224).

2. A shredding mechanism for a pulper as claimed in claim 1, wherein 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). The gear set (32) is connected to the transmission shaft (22).

3. A shredding mechanism for a pulper as claimed in claim 1, wherein The defoaming assembly (27) comprises a guide pipe (271) and a defoaming piece (272). The lower end of the guide pipe (271) is fixedly connected to the upper end of the inner shaft (222). One end of the defoaming piece (272) is fixedly connected to the outer wall of the guide pipe (271).

4. A shredding mechanism for a pulper according to claim 3, wherein The top of the pulper (1) is also provided with an electric push rod (274). The telescopic shaft of the output end of the electric push rod (274) penetrates the pulper (1). The top opening of the guide pipe (271) is provided with a plurality of supports (273). The telescopic shaft of the output end of the electric push rod (274) is rotatably connected to the support (273).

5. A shredding mechanism for a pulper as claimed in claim 3, wherein When the inner shaft (222) is in the second position, the guide pipe (271) floats on the liquid surface while following the rotation of the inner shaft (222).

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