Crushing device for plastic recovery

Abstract

The invention relates to the field of plastic recovery and crushing, and particularly discloses a crushing device for plastic recovery, which comprises a crushing cylinder with a blanking groove formed in the upper part and a discharge groove formed in the lower part, as well as a spiral lifting blade and a screen cylinder which are arranged on the outer side in a sleeving manner. Plastic particles are evenly spread on the inner wall of the screen drum in circular motion through the lifting effect of the spiral lifting blade, the screening efficiency is improved, meanwhile, the spiral lifting blade scrapes and cleans the inner wall of the screen drum, and the situation that screen holes are blocked is reduced; besides, the screen drum and the spiral lifting blade are matched, so that intercepted large-granularity plastic particles circularly flow between the crushing drum and the inner annular cavity, circular crushing is realized, manual secondary feeding of screened plastic is replaced, manpower is saved, the number of equipment is reduced, and the overall crushing and recycling efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of plastic recycling and crushing, and more particularly to a crushing device for plastic recycling. Background Art

[0002] In the field of plastic recycling, plastic raw materials need to be crushed to facilitate subsequent transportation and processing. Crusher and screening machine are often used in the crushing process. Crusher is used to crush the plastic raw materials, and then screening machine is used to screen out plastic particles that meet the particle size requirements.

[0003] The traditional crushing device has a simple structure and needs to be screened after crushing. The crushed plastic mixture needs to be put into the screening device for screening, and the screened plastic that does not meet the particle size requirements is transferred to the crusher for secondary crushing. The above steps are repeated to ensure the crushing effect. However, the material is transferred multiple times between the crusher and the screening machine, the operation is cumbersome, and the crushing effect is not good. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a crushing device for plastic recycling, which can realize the integrated circulation crushing and screening of plastic raw materials.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A crushing device for plastic recycling comprises a cylinder, wherein a crushing cylinder fixedly connected to a bottom plate is arranged at a position of a central rotating axis of the cylinder, a crushing blade group is installed in the crushing cylinder, and the crushing blade group is fixedly connected to a central rotating shaft extending to the bottom of the cylinder, and the central rotating shaft is connected to a driving motor; a material dropping chute is arranged at the upper part of the crushing cylinder and a material discharging chute is arranged at the lower part, a screen cylinder rotatably connected to the inner wall of the cylinder is sleeved on the outer side of the crushing cylinder, an inner annular cavity for lifting plastic particles is arranged between the inner wall of the screen cylinder and the outer wall of the crushing cylinder, a spiral lifting blade is installed in the inner annular cavity, the spiral lifting blade slides against the inner wall of the screen cylinder and the outer wall of the crushing cylinder respectively, and the lower end of the spiral lifting blade is fixedly connected to the inner wall of the screen cylinder and the outer wall of the crushing cylinder. A rotating ring is nested between the inner wall of the screen drum and the outer wall of the crushing drum and is rotatably connected to the two. An inner gear ring is fixedly connected to the lower end of the rotating ring, and an outer gear ring is fixedly connected to the lower end of the screen drum. A driving gear meshing with the outer gear ring and the inner gear ring is provided between the outer gear ring and the inner gear ring, and the driving gear is connected to the central rotating shaft for transmission through a transmission assembly; a feeding hopper connected to the inner cavity of the crushing drum is fixedly connected to the upper end of the cylinder body, an outer annular cavity for collecting screened plastic particles is formed between the screen drum and the cylinder body, a discharge pipe tangentially connected to the outer annular cavity is fixedly connected to the lower part of the cylinder body, and evenly distributed sieve holes are opened on the circumferential side wall of the screen drum, and a scraper nested in the outer annular cavity is fixedly connected to its lower end.

[0007] As a further solution of the present invention: the central rotating shaft includes a lower rotating shaft connected to the driving motor, and a plurality of self-rotating cylinders stacked vertically and rotatably engaged with each other are abutted above the lower rotating shaft, and the upper end of the uppermost self-rotating cylinder is rotatably engaged with the upper rotating shaft, and a double-tooth cylinder is fixedly nested inside each self-rotating cylinder, on the upper part of the lower rotating shaft and on the lower part of the upper rotating shaft, and the double-tooth cylinder is a hollow cylindrical structure with openings at both ends, and its upper and lower end faces are fixedly connected with circumferentially distributed locking teeth, and transmission gears are meshed between adjacent double-tooth cylinders, and the transmission gears are rotatably connected to a fixing rod via an installation shaft, and a fixing seat rotatably connected to the upper rotating shaft is fixedly connected to the upper end of the fixing rod, and the fixing seat is fixedly connected to the top wall of the cylinder body by bolts, and a crushing blade group is fixedly installed on each self-rotating cylinder.

[0008] As a further solution of the present invention: a lifting cylinder is nested in the crushing cylinder and is in sliding contact with the inner wall thereof; pressure rods equidistantly distributed in a circle are fixedly connected to the opening at the upper end of the lifting cylinder; a prismatic cylinder slidably sleeved on an upper rotating shaft is fixedly connected to the inner side of the pressure rods; a sliding block is fixedly connected to the circumferential side wall of the lifting cylinder; a guide groove for the sliding block to slide is provided on the inner wall of the crushing cylinder; the guide groove is obliquely arranged in an annular groove.

[0009] As a further solution of the present invention: the lifting cylinder includes an upper cylinder, the sliding block and the pressure rod are fixedly connected to the upper cylinder, the lower end of the upper cylinder is fixedly connected to a guide cylinder, the outer side of the guide cylinder is sleeved with a movable cylinder slidably connected to it, and the movable cylinder is nested with a support spring abutting against the guide cylinder.

[0010] As a further scheme of the present invention: the cylinder body is a vertical hollow cylindrical structure, the crushing cylinder is a vertical cylindrical structure with an opening at the upper end, the screen cylinder is a vertical cylindrical structure with openings at both ends, the inner wall of the cylinder is fixedly connected with a bearing plate rotatably connected to the screen cylinder, the upper end of the screen cylinder is rotatably connected to the top wall of the cylinder body through a bearing seat, the lower end of the crushing cylinder is fixedly connected with a support frame, the upper end of the crushing cylinder is fixedly connected to the top wall of the cylinder body through bolts, and the rotating ring is a circular ring structure.

[0011] As a further solution of the present invention: the transmission assembly includes a vertical shaft fixedly connected to the driving gear, the lower end of the vertical shaft is connected to the horizontal shaft through the first transmission gear set, the horizontal shaft is connected to the central rotating shaft through the second transmission gear set, and both the vertical shaft and the horizontal shaft are rotatably connected to the support frame.

[0012] As a further solution of the present invention: the self-rotating drum is a vertical cylindrical structure with openings at both ends, a ring-shaped groove is provided at the lower end of the self-rotating drum, a clamping ring matching the ring-shaped groove is provided at the upper end of the self-rotating drum, a clamping ring matching the ring-shaped groove is provided at the upper end of the lower rotating shaft, and a ring-shaped groove matching the clamping ring is provided at the lower part of the upper rotating shaft.

[0013] As a further solution of the present invention: the lifting cylinder is a hollow cylindrical structure with openings at both ends, the pressure rod is a horizontally radially arranged round rod, the prismatic cylinder is a cylindrical structure with a prismatic cavity in the middle, the upper rotating shaft passes through the prismatic cavity and slides in contact with its inner wall, and the cross-sections of the upper rotating shaft and the prismatic cavity are both regular polygons.

[0014] As a further solution of the present invention: the vertical projection areas of the upper cylinder and the movable cylinder are equal, the inner edge of the upper opening of the upper cylinder is a rounded surface, and the inner edge of the lower opening of the movable cylinder is a chamfered surface.

[0015] Compared with the prior art, the advantages of the present invention are: (1) The present invention has a crushing cylinder with a material drop chute at the top and a material discharge chute at the bottom, and a spiral lifting blade and a screen cylinder sleeved on the outside. When crushing plastic, the lifting effect of the spiral lifting blade is used to evenly spread the plastic particles on the inner wall of the screen cylinder in a circular motion, thereby improving the screening efficiency. At the same time, the spiral lifting blade scrapes and cleans the inner wall of the screen cylinder to reduce the blockage of the screen holes. In addition, the cooperation between the screen cylinder and the spiral lifting blade allows the trapped large-size plastic particles to circulate between the crushing cylinder and the inner annular cavity, thereby realizing cyclic crushing, replacing manual secondary feeding of the screened plastic, saving manpower, reducing the number of equipment, and improving the overall crushing and recycling efficiency.

[0016] (2) The present invention has multiple groups of crushing blade groups arranged in a crushing cylinder and fixed on a central rotating shaft. The central rotating shaft includes a lower rotating shaft, an upper rotating shaft and a self-rotating cylinder rotatably connected therebetween. By utilizing a double-tooth cylinder installed in the self-rotating cylinder and a transmission gear between adjacent double-tooth cylinders, the ringing self-rotating cylinder drives the crushing blade groups thereon to make reverse circular motion, thereby performing reverse shearing and crushing on the plastic raw materials located between the crushing blade groups, reducing the situation where the plastic raw materials rotate synchronously with the blades, and improving the crushing effect of the plastic raw materials.

[0017] (3) The present invention is provided with a lifting cylinder which is linked with the central rotating shaft and moves up and down. When the plastic is crushed, the discharge groove at the bottom of the crushing cylinder is blocked by the lifting cylinder, and the upper part of the plastic is rotated and squeezed by the pressure rod connected to the lifting cylinder, so that the plastic raw material is in close contact with the blade, and the plastic raw material is squeezed and crushed, thereby further improving the crushing effect.

[0018] (4) The present invention is provided with a lifting cylinder including an upper cylinder, a guide cylinder, a support spring and a movable cylinder. After the movable cylinder blocks the discharge chute, the upper cylinder continues to drive the pressure rod to rotate downward, thereby improving the squeezing effect on the plastic raw material, prolonging the contact time between the crushing blade group and the squeezed and blocked plastic, and further improving the crushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the transverse cross-sectional structure of the present invention; Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 4 It is a schematic diagram of the three-dimensional structure of the grinding cylinder in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the screen drum in the present invention; Figure 6 It is a schematic diagram of the assembly structure of the spiral lifting blade and the rotating ring in the present invention; Figure 7 This is a schematic diagram of the state of plastic particles circulating in the cylinder; Figure 8 for Figure 2 A schematic diagram of the enlarged structure at B in the middle; Fig. 9 It is a schematic diagram of the assembly structure of the lifting cylinder and the central rotating shaft in the present invention; Fig.10 It is a schematic diagram of the assembly structure of the prismatic tube and the lifting tube in the present invention; Fig.11 It is a schematic diagram of the internal structure of the grinding cylinder in the present invention; Fig.12 It is a schematic diagram of the assembly structure of the upper rotating shaft, the self-rotating cylinder and the lower rotating shaft in the present invention; Fig.13 It is a schematic diagram of the assembly structure of the self-rotating cylinder and the double-gear cylinder in the present invention.

[0020] Explanation of the reference numerals in the figure: 1, cylinder; 101, bearing plate; 2, feeding hopper; 3, discharge pipe; 4, crushing cylinder; 401, drop chute; 402, discharge chute; 403, guide groove; 5, screen cylinder; 501, screen hole; 502, scraper; 6, spiral lifting blade; 7, rotating ring; 8, inner gear ring; 9, outer gear ring; 10, driving gear; 11, vertical shaft; 12, first transmission gear set; 13, horizontal shaft; 14, second transmission gear set; 15, Central rotating shaft; 1501, lower rotating shaft; 1502, self-rotating cylinder; 1503, upper rotating shaft; 16, driving motor; 17, supporting frame; 18, crushing blade assembly; 1801, blade; 19, double-tooth cylinder; 20, transmission gear; 21, fixing rod; 22, fixing seat; 23, lifting cylinder; 2301, upper cylinder; 2302, guide cylinder; 2303, movable cylinder; 2304, supporting spring; 24, sliding block; 25, pressure rod; 26, prismatic cylinder. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] See also Figure 1-7 In one embodiment of the present invention, a crushing device for recycling plastics includes a cylinder 1; a crushing cylinder 4 fixedly connected to the bottom plate of the cylinder 1 is provided at the central rotation axis position of the cylinder 1, a crushing blade group 18 is installed in the crushing cylinder 4, the crushing blade group 18 is fixedly connected to a central rotation shaft 15 extending below the cylinder 1, and the central rotation shaft 15 is connected to a driving motor 16; a material drop chute 401 is provided at the upper part of the crushing cylinder 4 and a material discharge chute 402 is provided at the lower part; a screen cylinder 5 rotatably connected to the inner wall of the cylinder 1 is sleeved on the outer side of the crushing cylinder 4, and a screen cylinder 5 is provided between the inner wall of the screen cylinder 5 and the outer wall of the crushing cylinder 4. There is an inner annular cavity for lifting plastic particles, and a spiral lifting blade 6 is installed in the inner annular cavity. The spiral lifting blade 6 slides against the inner wall of the screen cylinder 5 and the outer wall of the crushing cylinder 4 respectively. The lower end of the spiral lifting blade 6 is fixedly connected to a rotating ring 7 nested between the inner wall of the screen cylinder 5 and the outer wall of the crushing cylinder 4 and rotatably connected to the two. The lower end of the rotating ring 7 is fixedly connected to an inner gear ring 9, and the lower end of the screen cylinder 5 is fixedly connected to an outer gear ring 8. A driving gear 10 meshing with the outer gear ring 8 and the inner gear ring 9 is provided between the outer gear ring 8 and the inner gear ring 9, and the driving gear 10 is connected to the central rotating shaft 15 for transmission through a transmission assembly; A feeding hopper 2 connected to the inner cavity of the crushing cylinder 4 is fixedly connected to the upper end of the cylinder 1, an outer annular cavity for collecting and screening out plastic particles is formed between the screen cylinder 5 and the cylinder 1, a discharge pipe 3 connected tangentially to the outer annular cavity is fixedly connected to the lower part of the cylinder 1, and evenly distributed sieve holes 501 are opened on the circumferential side wall of the screen cylinder 5, and a scraper 502 nested in the outer annular cavity is fixedly connected to the lower end thereof.

[0025] For details, please refer to Figure 7 When recycling and crushing plastics, large-sized plastic particles are put into the crushing barrel 4 from the feeding hopper 2, and the driving motor 16 is started. The driving motor 16 drives the crushing blade group 18 to rotate through the central rotating shaft 15. The crushing blade group 18 crushes the large-sized plastic particles in the crushing barrel 4 into small-sized plastic particles. At the same time, under the centrifugal force of the crushing blade group 18, the plastic particles enter the inner annular cavity through the discharge groove 402 at the bottom of the crushing barrel 4. The central rotating shaft 15 drives the driving gear 10 to rotate through the transmission assembly, and the driving The gear 10 drives the outer gear ring 8 and the inner gear ring 9 to rotate in opposite directions, and the outer gear ring 8 drives the screen drum 5 to rotate in a circle to centrifugally screen the plastic particles entering the inner annular cavity. The inner gear ring 9 drives the spiral lifting blades 6 to rotate in the inner annular cavity to vertically lift the plastic particles, so that the plastic particles are fully spread on the screen drum 5, thereby improving the screening efficiency. At the same time, the screen drum 5 and the spiral lifting blades 6 that rotate in opposite directions slide against each other, so that the spiral lifting blades 6 scrape and clean the inner wall of the screen drum 5 to avoid blockage of the screen drum 5. In addition, the large-sized plastic particles intercepted by the sieve hole 501 move upward along with the spiral lifting blade 6. When the large-sized plastic particles move to the position of the drop chute 401 on the upper part of the crushing cylinder 4, they enter the crushing cylinder 4 again under the action of gravity and extrusion, so that the intercepted large-sized plastic particles circulate between the crushing cylinder 4 and the inner annular cavity to achieve cyclic crushing. In addition, the small-sized plastic particles screened out by the sieve hole 501 enter the outer annular cavity outside the sieve drum 5. When the sieve drum 5 rotates, it drives the scraper 502 at its lower end to make a circular motion, so that the small-sized plastic particles screened out in the outer annular cavity are discharged from the discharge pipe 3 due to the centrifugal effect.

[0026] Compared with the traditional plastic recycling and crushing device, the present invention has a crushing cylinder 4 with a feeding chute 401 on the upper part and a discharge chute 402 on the lower part, and a spiral lifting blade 6 and a screen cylinder 5 sleeved on the outside. When the plastic is crushed, the lifting effect of the spiral lifting blade 6 is used to evenly spread the plastic particles on the inner wall of the circularly moving screen cylinder 5, thereby improving the screening efficiency. At the same time, the spiral lifting blade 6 scrapes and cleans the inner wall of the screen cylinder 5 to reduce the blockage of the screen hole 501. In addition, the cooperation of the screen cylinder 5 and the spiral lifting blade 6 allows the trapped large-size plastic particles to circulate between the crushing cylinder 4 and the inner annular cavity to achieve circulating crushing, replacing the manual secondary delivery of the screened plastic, saving manpower, reducing the number of equipment, and improving the overall crushing and recycling efficiency.

[0027] See also Figure 3-6 The cylinder 1 is a vertical hollow cylindrical structure, the crushing cylinder 4 is a vertical cylindrical structure with an opening at the upper end, the screen cylinder 5 is a vertical cylindrical structure with openings at both ends, the inner wall of the cylinder 1 is fixedly connected with a bearing plate 101 rotatably connected to the screen cylinder 5, the upper end of the screen cylinder 5 is rotatably connected to the top wall of the cylinder 1 through a bearing seat, the lower end of the crushing cylinder 4 is fixedly connected with a support frame 17, the upper end of the crushing cylinder 4 is fixedly connected to the top wall of the cylinder 1 through bolts, and the rotating ring 7 is a circular ring structure.

[0028] Specifically, the crushing cylinder 4 and the screen cylinder 5 are stably connected and installed.

[0029] See also Figure 2 and Figure 3 The transmission assembly includes a vertical shaft 11 fixedly connected to the driving gear 10, the lower end of the vertical shaft 11 is connected to the horizontal shaft 13 through the first transmission gear set 12, the horizontal shaft 13 is connected to the central shaft 15 through the second transmission gear set 14, and the vertical shaft 11 and the horizontal shaft 13 are both rotatably connected to the support frame 17.

[0030] Specifically, the central shaft 15 drives the horizontal shaft 13 to rotate through the second transmission gear set 14, the horizontal shaft 13 drives the vertical shaft 11 to rotate through the first transmission gear set 12, the vertical shaft 11 drives the driving gear 10 to rotate, and the driving gear 10 drives the outer gear ring 8 and the inner gear ring 9 to rotate in the opposite direction.

[0031] See also Figure 8-13In another embodiment of the present invention, the central rotating shaft 15 includes a lower rotating shaft 1501 connected to the driving motor 16, and a plurality of self-rotating cylinders 1502 vertically stacked and rotatably connected to each other are abutted on the upper side of the lower rotating shaft 1501, and an upper rotating shaft 1503 is rotatably connected to the upper end of the uppermost self-rotating cylinder 1502, and a double-toothed cylinder 19 is fixedly nested inside each self-rotating cylinder 1502, on the upper part of the lower rotating shaft 1501, and on the lower part of the upper rotating shaft 1503, and a transmission gear 20 is meshed between adjacent double-toothed cylinders 19, and the transmission gear 20 is rotatably connected to a fixing rod 21 through an installation shaft, and a fixing seat 22 rotatably connected to the upper rotating shaft 1503 is fixedly connected to the upper end of the fixing rod 21, and the fixing seat 22 is fixedly connected to the top wall of the cylinder body 1 by bolts, and a crushing blade group 18 is fixedly installed on each self-rotating cylinder 1502.

[0032] Specifically, when the driving motor 16 drives the lower rotating shaft 1501 to rotate, the lower rotating shaft 15 drives the double-toothed cylinder 19 inside it to rotate, and the adjacent double-toothed cylinders 19 are transmitted through the transmission gear 20, so that the adjacent self-rotating cylinders 1502 rotate in the opposite direction, and the vertically adjacent crushing blade groups 18 rotate in opposite directions, which has a better reverse shearing and crushing effect on the plastic particles and reduces the occurrence of plastic rotating synchronously with multiple blades in the same direction.

[0033] See also Figure 8 and Fig.13 The self-rotating cylinder 1502 is a vertical cylindrical structure with openings at both ends. An annular groove is provided at the lower end of the self-rotating cylinder 1502, and a snap ring that cooperates with the annular groove is provided at the upper end of the self-rotating cylinder 1502. A snap ring that cooperates with the annular groove is provided at the upper end of the lower rotating shaft 1501, and an annular groove that cooperates with the snap ring is opened at the lower part of the upper rotating shaft 1503.

[0034] Specifically, the adjacent self-rotating drums 1502 and the connection between the self-rotating drum 1502 and the lower rotating shaft 1501 and the upper rotating shaft 1503 are realized by snapping and rotating.

[0035] See also Fig.13 The double-toothed cylinder 19 is a hollow cylindrical structure with openings at both ends. The upper and lower end surfaces of the double-toothed cylinder 19 are fixedly connected with circumferentially distributed latching teeth.

[0036] Specifically, the transmission and rotation of adjacent rotating drums 1502 are realized.

[0037] See also Fig.13 The crushing blade set 18 includes a plurality of blades 1801 that are equidistantly distributed around the circumference.

[0038] See also Figure 8-10In another embodiment of the present invention, a lifting cylinder 23 is nested in the crushing cylinder 4 and is in sliding contact with the inner wall thereof. A pressure rod 25 equidistantly distributed around the circumference is fixedly connected to the upper opening of the lifting cylinder 23. A prismatic cylinder 26 slidably sleeved on the upper rotating shaft 1503 is fixedly connected to the inner side of the pressure rod 25. The upper rotating shaft 1503 is a prismatic shaft. A sliding block 24 is fixedly connected to the circumferential side wall of the lifting cylinder 23. A guide groove 403 for the sliding of the sliding block 24 is provided on the inner wall of the crushing cylinder 4. The guide groove 403 is obliquely arranged in an annular groove. When the sliding block 24 slides in the guide groove 403, the sliding block 24 drives the lifting cylinder 23 to move up and down.

[0039] Specifically, the lifting cylinder 23 moves up and down in the pulverizing cylinder 4. When the lifting cylinder 23 moves downward, the lifting cylinder 23 blocks the discharge groove 402. At the same time, the pressure rod 25 squeezes the plastic raw material above the pulverizing blade group 18, so that the plastic raw material within the range of the pulverizing blade group 18 is squeezed and compacted, so that the blade 1801 of the pulverizing blade group 18 is in closer contact with the plastic raw material, avoiding the plastic raw material being squeezed and moved by the blade 1801, thereby improving the pulverizing effect. When the lifting cylinder 23 moves upward, the discharge groove 402 is re-connected with the inner annular cavity for discharge.

[0040] See also Figure 8 The lifting cylinder 23 is a hollow cylindrical structure with openings at both ends, the pressure rod 25 is a horizontal radially arranged round rod, the prism cylinder 26 is a cylindrical structure with a prism cavity in the middle, the upper rotating shaft 1503 passes through the prism cavity and slides against the inner wall thereof, and the cross-sections of the upper rotating shaft 1503 and the prism cavity are both regular polygons.

[0041] Specifically, the upper rotating shaft 1503 drives the prism cylinder 26 to rotate, the prism cylinder 26 drives the lifting cylinder 23 to rotate through the pressure rod 25, the lifting cylinder 23 drives the sliding block 24 to rotate, and the sliding block 24 drives the lifting cylinder 23 to rotate up and down, thereby realizing the opening and closing of the discharge chute 402 and the rotational extrusion of the plastic raw material.

[0042] See also Figure 8-10 The lifting cylinder 23 includes an upper cylinder 2301, the sliding block 24 and the pressure rod 25 are fixedly connected to the upper cylinder 2301, the lower end of the upper cylinder 2301 is fixedly connected to a guide cylinder 2302, the outer side of the guide cylinder 2302 is sleeved with a movable cylinder 2303 slidably connected thereto, and the movable cylinder 2303 is nested with a support spring 2304 abutting against the guide cylinder 2302.

[0043] Specifically, when the lifting cylinder 23 moves downward, the movable cylinder 2303 has reached the lowest point under the extrusion of the support spring 2304 and the guide cylinder 2302, that is, when the movable cylinder 2303 completely blocks the discharge groove 402, the upper cylinder 2301 drives the pressure rod 25 to continue to rotate downward, so that after the discharge groove 402 is blocked, the pressure rod 25 continues to rotate downward, and the plastic raw material is squeezed and crushed for a longer time. By extending the extrusion and crushing time after blocking, the extrusion and crushing effect is further improved.

[0044] In this embodiment, the vertical projection areas of the upper cylinder 2301 and the movable cylinder 2303 are equal, the inner edge of the upper opening of the upper cylinder 2301 is a rounded surface, and the inner edge of the lower opening of the movable cylinder 2303 is a chamfered surface.

[0045] Specifically, the rounded surface of the upper cylinder 2301 facilitates the plastic raw material to roll into the lifting cylinder 23 under the action of gravity and extrusion force, and the chamfered surface of the movable cylinder 2303 facilitates the movable cylinder 2303 to be inserted downward into the plastic raw material to efficiently block the discharge groove 402.

Claims

1. A crushing device for plastic recycling, characterized in that: The invention comprises a cylinder (1), wherein a pulverizing cylinder (4) fixedly connected to a bottom plate of the cylinder (1) is provided at a central rotation axis position of the cylinder (1), a pulverizing blade assembly (18) is installed in the pulverizing cylinder (4), the pulverizing blade assembly (18) is fixedly connected to a central rotation shaft (15) extending below the cylinder (1), and the central rotation shaft (15) is connected to a driving motor (16); The pulverizing cylinder (4) is provided with a material drop chute (401) at the top and a material discharge chute (402) at the bottom. A screen cylinder (5) rotatably connected to the inner wall of the cylinder body (1) is sleeved on the outer side of the pulverizing cylinder (4). An inner annular cavity for lifting plastic particles is provided between the inner wall of the screen cylinder (5) and the outer wall of the pulverizing cylinder (4). A spiral lifting blade (6) is installed in the inner annular cavity. The spiral lifting blade (6) abuts and slides against the inner wall of the screen cylinder (5) and the outer wall of the pulverizing cylinder (4) respectively. The lower end of the spiral lifting blade (6) is fixedly connected to a rotating ring (7) nested between the inner wall of the screen cylinder (5) and the outer wall of the pulverizing cylinder (4) and rotatably connected to the two. The lower end of the rotating ring (7) is fixedly connected to an inner gear ring (9). The lower end of the pulverizing cylinder (5) is fixedly connected to an outer gear ring (8). A driving gear (10) meshing with the outer gear ring (8) and the inner gear ring (9) is provided between the outer gear ring (8) and the inner gear ring (9). The driving gear (10) is connected to the central rotating shaft (15) for transmission through a transmission assembly. The upper end of the cylinder (1) is fixedly connected to a feeding hopper (2) which is in communication with the inner cavity of the crushing cylinder (4); an outer annular cavity for collecting screened plastic particles is formed between the screen cylinder (5) and the cylinder (1); a discharge pipe (3) which is tangentially connected to the outer annular cavity is fixedly connected to the lower part of the cylinder (1); evenly distributed sieve holes (501) are provided on the circumferential side wall of the screen cylinder (5); and a scraper (502) which is nested in the outer annular cavity is fixedly connected to the lower end of the screen cylinder (5).

2. The crushing device for plastic recycling according to claim 1, characterized in that: The central rotating shaft (15) comprises a lower rotating shaft (1501) connected to a driving motor (16); a plurality of self-rotating cylinders (1502) vertically stacked and rotatably connected to each other are abutted on the upper side of the lower rotating shaft (1501); an upper rotating shaft (1503) is rotatably connected to the upper end of the uppermost self-rotating cylinder (1502); a double-toothed cylinder (19) is fixedly embedded in the interior of each self-rotating cylinder (1502), the upper part of the lower rotating shaft (1501) and the lower part of the upper rotating shaft (1503); The cylinder (19) is a hollow cylindrical structure with openings at both ends, and its upper and lower end surfaces are fixedly connected with circumferentially distributed latching teeth. A transmission gear (20) is meshed between adjacent double-tooth cylinders (19). The transmission gear (20) is rotatably connected to a fixed rod (21) via a mounting shaft. The upper end of the fixed rod (21) is fixedly connected to a fixed seat (22) rotatably connected to an upper rotating shaft (1503). The crushing blade group (18) is fixedly mounted on each self-rotating cylinder (1502).

3. The crushing device for plastic recycling according to claim 2, characterized in that: The pulverizing cylinder (4) is nested with a lifting cylinder (23) which is slidably abutted against the inner wall thereof; the upper end opening of the lifting cylinder (23) is fixedly connected to pressure rods (25) which are equidistantly distributed in a circumference; the inner side of the pressure rods (25) is fixedly connected to a prismatic cylinder (26) which is slidably sleeved on an upper rotating shaft (1503); the upper rotating shaft (1503) is a prismatic shaft; the circumferential side wall of the lifting cylinder (23) is fixedly connected to a sliding block (24); the inner wall of the pulverizing cylinder (4) is provided with a guide groove (403) for the sliding block (24) to slide; the guide groove (403) is an annular groove which is inclined.

4. The crushing device for plastic recycling according to claim 3, characterized in that: The lifting cylinder (23) comprises an upper cylinder (2301), a sliding block (24) and a pressure rod (25) are fixedly connected to the upper cylinder (2301), a guide cylinder (2302) is fixedly connected to the lower end of the upper cylinder (2301), a movable cylinder (2303) slidably connected to the guide cylinder (2302) is sleeved on the outer side of the guide cylinder (2302), and a support spring (2304) abutting against the guide cylinder (2302) is nested in the movable cylinder (2303).

5. The crushing device for plastic recycling according to claim 1, characterized in that: The cylinder (1) is a vertical hollow cylindrical structure, the crushing cylinder (4) is a vertical cylindrical structure with an opening at the upper end, the screen cylinder (5) is a vertical cylindrical structure with openings at both the upper and lower ends, a bearing plate (101) rotatably connected to the screen cylinder (5) is fixedly connected to the inner wall of the cylinder (1), the upper end of the screen cylinder (5) is rotatably connected to the top wall of the cylinder (1) via a bearing seat, the lower end of the crushing cylinder (4) is fixedly connected to a support frame (17), the upper end of the crushing cylinder (4) is fixedly connected to the top wall of the cylinder (1) via bolts, and the rotating ring (7) is a circular ring structure.

6. The crushing device for plastic recycling according to claim 1, characterized in that: The transmission assembly comprises a vertical shaft (11) fixedly connected to a driving gear (10); the lower end of the vertical shaft (11) is connected to a horizontal shaft (13) via a first transmission gear set (12); the horizontal shaft (13) is connected to a central rotating shaft (15) via a second transmission gear set (14); and both the vertical shaft (11) and the horizontal shaft (13) are rotationally connected to a support frame (17).

7. The crushing device for plastic recycling according to claim 2, characterized in that: The self-rotating cylinder (1502) is a vertical cylindrical structure with openings at both ends. The lower end of the self-rotating cylinder (1502) is provided with an annular groove, the upper end of the self-rotating cylinder (1502) is provided with a snap ring that cooperates with the annular groove, the upper end of the lower rotating shaft (1501) is provided with a snap ring that cooperates with the annular groove, and the lower part of the upper rotating shaft (1503) is provided with an annular groove that cooperates with the snap ring.

8. The crushing device for plastic recycling according to claim 3, characterized in that: The lifting cylinder (23) is a hollow cylindrical structure with openings at both ends, the pressure rod (25) is a round rod arranged horizontally and radially, the prism cylinder (26) is a cylindrical structure with a prism cavity opened in the middle, the upper rotating shaft (1503) passes through the prism cavity and slidably abuts against the inner wall thereof, and the cross-sections of the upper rotating shaft (1503) and the prism cavity are both regular polygons.

9. The crushing device for plastic recycling according to claim 4, characterized in that: The vertical projection areas of the upper cylinder (2301) and the movable cylinder (2303) are equal; the inner edge of the upper opening of the upper cylinder (2301) is a rounded surface, and the inner edge of the lower opening of the movable cylinder (2303) is a chamfered surface.

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