A plastic pipe recycled material pelletizing equipment

Abstract

The present invention belongs to the technical field of plastic pellet production equipment, and particularly relates to a plastic pipe recycling granulation equipment, including a crushing and cleaning component, a liquid discharging and air drying component, an extrusion and pelletizing component, and a cooling component. The crushing and cleaning component is used for crushing and continuously and effectively cleaning waste plastics of different densities. The liquid discharging and air drying component is used for intermittently discharging the cleaning liquid from the cleaned plastic blocks and effectively air drying the discharged plastic blocks. The extrusion and pelletizing component is used for extruding plastic strips from the air-dried plastic blocks and effectively pelletizing the extruded softened plastic strips. The cooling component is used for water-cooling the plastic pellets. In the present invention, the leaf plates circumferentially and uniformly distributed on the inner circumference of the cleaning cylinder of the crushing and cleaning component can guide the waste plastic blocks of different densities that are crushed by the twin-shaft crushing equipment, reach the liquid level of the cleaning liquid, and rotate with the cleaning liquid into the cleaning liquid for effective cleaning, avoiding the ineffective cleaning of the plastic blocks with a density less than that of water due to floating on the liquid surface during the cleaning process.

Description

Technical Field

[0001] The present invention belongs to the technical field of plastic pellet production equipment, and particularly relates to a plastic pipe regrind pelletizing equipment. Background Art

[0002] The recycling of waste plastic pipes is a crucial link in the environmental protection production of plastics. Recycled plastics usually go through processes such as crushing, cleaning, melting, extrusion, cooling, and pelletizing. For example, in the patent with the publication number 201810645870.2, during the cooling process of plastic strips before pelletizing, water cooling, air cooling, or liquid nitrogen is generally used to cool the plastic strips. In order to achieve an ideal cooling effect, when the cooling equipment is horizontally arranged, it is required that the cooling equipment has a long layout space and occupies a large amount of space in the factory building.

[0003] Before waste plastics are melted and extruded after being crushed, they need to be effectively cleaned with water containing a cleaning agent. Plastics have different densities, some plastics have a density greater than that of water while some plastics have a density less than that of water. General cleaning equipment only targets plastics with a density greater than that of water or uses a stirring method to clean plastics. When using the stirring method to clean plastics with a density less than that of water, the plastics with a density less than that of water will float upward in the water, resulting in a poor cleaning effect of the plastics. At the same time, the cleaning of general plastics is intermittent, that is, after cleaning a batch of plastics and filtering and collecting the plastics, another batch of plastics is put in for cleaning and filtering and collecting. This cleaning method has a low efficiency.

[0004] The present invention designs a plastic pipe regrind pelletizing equipment to solve the above problems. Summary of the Invention

[0005] Based on this, it is necessary to provide a plastic pipe reclaimed material pelletizing device for the problems existing in the current plastic pellet production equipment. In the present invention, the blade plates circumferentially and uniformly distributed on the inner circumference of the cleaning cylinder of the crushing and cleaning assembly can guide the waste plastic blocks with different densities, which are crushed by the double-shaft crushing device, reach the liquid level of the cleaning liquid and rotate with the cleaning liquid, into the cleaning liquid for effective cleaning, avoiding the ineffective cleaning of the plastic blocks with a density less than that of water due to floating on the liquid surface during the cleaning process. In the crushing and cleaning assembly of the present invention, the vortex-shaped first drainage net located below the blade plates and circumferentially and uniformly distributed in the cleaning cylinder enables the cleaned plastic blocks that enter the cleaning liquid and rotate with the cleaning liquid to move along the first drainage net towards the four rows of first discharge ports on the wall surface of the cleaning cylinder. The several second drainage nets arranged on the first drainage net then precisely guide the cleaned plastic blocks moving along the first drainage net to the respective first discharge ports in the corresponding row and enable the cleaned plastic blocks to enter the corresponding shell of the liquid discharge and air drying assembly through the first discharge ports. The plastic blocks that enter the corresponding shell are discharged from the cleaning liquid under the interaction of the corresponding two second baffles and the first baffle. The plastic blocks discharged from the cleaning liquid are blown through the first discharge pipe to the extrusion and pelletizing assembly by the dry air sent by the first air pump above. The first filter holes at the bottom of the first discharge pipe can filter out the cleaning liquid in the plastic blocks and recycle it. The dry air sent by the first air pump can effectively air-dry the plastic blocks from which the cleaning liquid has been filtered during the movement of the plastic blocks in the first discharge pipe, ensuring that the crushing and cleaning assembly can continuously and uninterruptedly clean the plastic blocks and effectively improving the cleaning efficiency of the plastic blocks. In the extrusion and pelletizing assembly and the cooling assembly of the present invention, after extruding the plastic into plastic strips, the plastic strips can be pelletized first and then the plastic pellets can be water-cooled. The spiral grooves in the cooling assembly can perform spiral water-cooling on a large number of continuously entering plastic pellets, effectively saving the layout space of the cooling equipment. In the extrusion and pelletizing assembly of the present invention, the two groups of double-person cutting knives can effectively pelletize the plastic strips that are just extruded and still in a softened state. The air channels on the upper and lower sides of the double-person cutting knives can effectively blow the cut softened plastic pellets away from the cutting knives, preventing the softened plastic pellets from adhering to the double-person cutting knives and effectively completing the high-efficiency pelletizing of the softened plastic strips.

[0006] The above object is achieved by the following technical solutions:

[0007] A plastic pipe reclaimed material pelletizing device for the crushing, cleaning and extrusion pelletizing of waste plastics, comprising:

[0008] A crushing and cleaning assembly for crushing and continuously and effectively cleaning waste plastics with different densities.

[0009] A liquid discharge and air drying assembly for intermittently discharging the cleaned plastic blocks from the cleaning liquid and effectively air-drying the discharged plastic blocks, and the liquid discharge and air drying assembly has the characteristic of small cleaning liquid loss.

[0010] An extrusion granulation assembly is used to extrude plastic strips from the air-dried plastic blocks and effectively granulate the extruded softened plastic strips.

[0011] A cooling assembly is used to cool the plastic granules by water cooling, and the cooling assembly has the characteristic of a small layout space.

[0012] In one embodiment, the crushing and cleaning assembly includes a cleaning cylinder suspended by a bracket. Above the cleaning cylinder, there is a double-shaft crushing device. In the upper part of the cleaning cylinder, there are several inclined vanes evenly distributed circumferentially. Below the vanes, there are several vortex-shaped first drainage nets coaxially arranged with the cleaning cylinder and guiding the rotating cleaning liquid in the cleaning cylinder to the corresponding row of first discharge ports on the cylinder wall of the cleaning cylinder. On the convex surface of the first drainage net, there are several second drainage nets guiding the rotating cleaning liquid into the first discharge ports. At the bottom of the cleaning cylinder, there is a bushing. Inside the bushing, a rotating shaft connected to the first motor on the bracket is arranged. At the upper end of the rotating shaft, there are several blades circumferentially arranged. A partition net is arranged between the blades and the first drainage net.

[0013] In one embodiment, the liquid discharging and air-drying assembly includes several shells corresponding one by one to the first drainage nets. The shells are arranged on the outer wall of the cleaning cylinder at the corresponding row of first discharge ports of the corresponding first drainage nets. Inside the shell, there is a first baffle hinged by a vertical first hinge shaft, which divides the shell into two parts of space and is driven by a second motor. One side space of the first baffle is communicated with the corresponding row of first discharge ports. At the top and bottom of the other side space of the first baffle, there are a first air supply pipe and a second discharge port respectively. Inside the space of the shell divided by the first baffle on the side of the first discharge port, there are two second baffles symmetrically hinged by a vertical second hinge shaft, which push the plastic blocks discharged from the first discharge port towards the first baffle and are driven by a third motor. A fork part is arranged at the end side of the second baffle. The first air supply pipe is communicated with a second annular pipe. The second annular pipe is connected to a first air pump arranged on the outer wall of the cleaning cylinder through a pipeline. The second discharge port is communicated with a first annular pipe arranged on the outer wall of the cleaning cylinder. An S-shaped first discharge pipe communicated with the first annular pipe is arranged on the first annular pipe. The bottom wall surface of the first discharge pipe is provided with dense first filter holes.

[0014] In one embodiment, a first water tank communicated with the first filter holes is arranged on the outer wall of the first discharge pipe through a drainage channel. A first liquid discharge pipe for discharging liquid into the cleaning cylinder is arranged on the wall surface of the water tank, and a first water pump is arranged on the first liquid discharge pipe.

[0015] In one embodiment, a first gear is arranged at the upper end of the first hinge shaft, and the first gear meshes with a second gear arranged on the output shaft of the second motor on the shell.

[0016] In one embodiment, third gears are provided on the two second hinge shafts corresponding to the two second baffles in the housing, and the two third gears are respectively meshed with two fourth gears on the housing. The two fourth gears are connected by two meshing fifth gears in transmission, and the shaft where one of the fifth gears is located is in transmission connection with a third motor on the housing.

[0017] In one embodiment, the extrusion and pelletizing assembly includes an extruder. A flaring sleeve is provided at the extrusion end of the extruder. An extrusion plate is provided at the lower end of the flaring sleeve. A plurality of columns of extrusion holes are formed in the extrusion plate. A frame body is provided on the flaring sleeve. Two pairs of guide sleeves are symmetrically provided on the frame body. A sliding rod is horizontally slidable in each pair of guide sleeves. The two sliding rods are both connected with racks through connecting rods. A reciprocating driving assembly is provided on the frame body. A sixth gear meshing with the two racks is provided on the output shaft of the reciprocating driving assembly. A plurality of double-sided cutters are spacedly provided on each of the two sliding rods. The double-sided cutters on the two sliding rods are staggeredly distributed. The gaps between adjacent double-sided cutters respectively correspond to the corresponding columns of extrusion holes on the extrusion plate. A separating structure for preventing the double-sided cutters from sticking to plastic pellets is provided on the upper and lower sides of the double-sided cutters. A hopper is provided below the double-sided cutters. The lower end of the hopper is provided with a second discharge pipe for guiding the plastic pellets to the cooling assembly.

[0018] In one embodiment, the separating structure includes air channels having the same length as the double-sided cutters. The air channels are provided on the upper and lower sides of the double-sided cutters. The air channels are connected to a second air pump on the corresponding connecting rod through second air delivery pipes buried in the double-sided cutters and the sliding rods. Exhaust ports for delivering air to the corresponding side blades of the corresponding double-sided cutters are densely formed on both sides of the air channels.

[0019] In one embodiment, guide plates for making the air discharged from the exhaust ports on the corresponding sides move horizontally are provided on both sides of the air channels.

[0020] In one embodiment, the cooling assembly includes a spiral groove suspended by a bracket. A straight groove is provided at the lower end of the spiral groove. Second filtering holes are densely formed at the middle bottom of the straight groove. A second water tank communicating with the second filtering holes is provided outside the bottom of the straight groove. A second liquid discharge pipe for circulating water drainage from the second water tank to the upper end of the spiral groove is provided on the wall surface of the second water tank. A second water pump is provided on the second liquid discharge pipe.

[0021] The beneficial effects of the present invention are:

[0022] 1. In the present invention, the blades circumferentially and uniformly distributed on the inner circumference of the cleaning cylinder of the crushing and cleaning assembly can guide the waste plastic blocks with different densities that are crushed by the double-shaft crushing equipment, reach the liquid level of the cleaning liquid, and rotate with the cleaning liquid into the cleaning liquid for effective cleaning, avoiding the ineffective cleaning of the plastic blocks with a density less than that of water due to floating on the liquid surface during the cleaning process.

[0023] 2. In the crushing and cleaning assembly of the present invention, the vortex-shaped first drainage net located below the blades and circumferentially and uniformly distributed in the cleaning cylinder enables the cleaned plastic blocks that enter the cleaning liquid and rotate with the cleaning liquid to move along the first drainage net towards the four rows of first discharge ports on the wall surface of the cleaning cylinder. The several second drainage nets arranged on the first drainage net then precisely guide the cleaned plastic blocks moving along the first drainage net to the respective first discharge ports in a corresponding row and enable the cleaned plastic blocks to enter the corresponding shell of the liquid discharge and air drying assembly through the first discharge ports. The plastic blocks that enter the corresponding shell are discharged from the cleaning liquid under the interaction of the corresponding two second baffles and the first baffle. The plastic blocks discharged from the cleaning liquid are blown by the dry air sent by the first air pump above through the first discharge pipe to the extrusion and pelletizing assembly. The first filter holes at the bottom of the first discharge pipe can filter out the cleaning liquid in the plastic blocks and recycle it. The dry air sent by the first air pump can effectively air-dry the plastic blocks from which the cleaning liquid has been filtered during the movement of the plastic blocks in the first discharge pipe, ensuring that the crushing and cleaning assembly can continuously and uninterruptedly clean the plastic blocks and effectively improving the cleaning efficiency of the plastic blocks.

[0024] 3. In the extrusion and pelletizing assembly and the cooling assembly of the present invention, after extruding the plastic into plastic strips, the plastic strips can be pelletized first and then the plastic pellets can be water-cooled. The spiral grooves in the cooling assembly can perform spiral water-cooling on a large number of continuously entering plastic pellets, effectively saving the layout space of the cooling equipment.

[0025] 4. The two groups of double knives in the extrusion and pelletizing assembly of the present invention can effectively pelletize the plastic strips that are just extruded and still in a softened state. The air channels on the upper and lower sides of the double knives can effectively blow the softened plastic pellets cut out away from the knives, preventing the softened plastic pellets from adhering to the double knives and effectively completing the high-efficiency pelletizing of the softened plastic strips. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a front schematic view of the present invention;

[0027] Figure 2 is a rear schematic view of the present invention;

[0028] Figure 3 is an overall cross-sectional view of the present invention;

[0029] Figure 4 is a top cross-sectional view of the crushing and cleaning assembly and the liquid discharge and air drying assembly;

[0030] Figure 5 It is a cross-sectional view of the distribution state of the blade, the first drainage net, and the second drainage net;

[0031] Figure 6 It is a side cross-sectional view of the internal structure of the housing;

[0032] Figure 7 It is the cleaning cylinder and its cross-sectional view;

[0033] Figure 8 They are two schematic diagrams of the distribution state of the blade;

[0034] Figure 9 It is a schematic diagram of the distribution of the first drainage net and the second drainage net thereon;

[0035] Figure 10 It is the housing and its cross-sectional view;

[0036] Figure 11 It is a schematic diagram of the cooperation of two second baffles;

[0037] Figure 12 It is a cross-sectional view of the drainage structure at the lowest point of the first discharge pipe;

[0038] Figure 13 It is a cross-sectional view of the driving structure of the first baffle;

[0039] Figure 14 It is a cross-sectional view of the driving structure of the second baffle;

[0040] Figure 15 They are three state diagrams of the first baffle and the second baffle in the housing of the liquid discharge and air-drying assembly;

[0041] Figure 16 It is a side cross-sectional view of the extrusion and pelletizing assembly;

[0042] Figure 17 It is a bottom cross-sectional view of the extrusion and pelletizing assembly;

[0043] Figure 18 It is a schematic diagram of the distribution of double knives on the slide bar;

[0044] Figure 19 It is the structure on the double knife and its cross-sectional view;

[0045] Figure 20 It is a cross-sectional view of the connection between the air duct and the second air supply pipe;

[0046] Figure 21 It is a cross-sectional view of the cooling assembly;

[0047] Figure 22 They are three state schematic diagrams of pelletizing by two groups of double knives;

[0048] The names of the reference numerals in the figure:

[0049] 100. Crushing and cleaning assembly; 101. Cleaning cylinder; 102. First discharge port; 103. Bushing; 104. Partition net; 105. Blade plate; 106. First drainage net; 107. Second drainage net; 108. First motor; 109. Rotating shaft; 110. Blades; 111. Double-shaft crushing equipment

[0050] 200. Liquid discharge and air-drying assembly; 201. Housing; 202. Second discharge port; 203. First air supply pipe; 204. First baffle; 205. First hinge shaft; 206. First gear; 207. Second gear; 208. Second motor; 209. Second baffle; 210. Second hinge shaft; 211. Third gear; 212. Fourth gear; 213. Fifth gear; 214. Third motor; 215. First annular pipe; 216. First discharge pipe; 217. First filter hole; 218. Drainage channel; 219. First water tank; 220. First liquid discharge pipe; 221. First water pump; 222. First air pump; 223. Fork part; 224. Second annular pipe

[0051] 300. Extrusion and pelletizing assembly; 301. Flaring sleeve; 302. Extrusion plate; 303. Extrusion hole; 304. Frame; 305. Guide sleeve; 306. Slide bar; 307. Connecting rod; 308. Rack; 309. Sixth gear; 310. Reciprocating drive assembly; 311. Double-person cutter; 312. Air duct; 313. Exhaust port; 314. Guide plate; 315. Second air supply pipe; 316. Second air pump; 317. Hopper; 318. Second discharge pipe; 319. Plastic strip; 320. Extruder; 321. Separation structure

[0052] 400. Cooling assembly; 401. Spiral groove; 402. Straight groove; 403. Second filter hole; 404. Second water tank; 405. Second liquid discharge pipe; 406. Second water pump Detailed implementation manners

[0053] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention

[0054] The serial numbers assigned to the components in this article itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And the "connection" and "coupling" mentioned in this application, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

[0055] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0056] As Figures 1 - 22 shown, a plastic pipe recycled material granulation device, which is used for the crushing, cleaning and extrusion granulation of waste plastics, includes:

[0057] A crushing and cleaning assembly 100, which is used for crushing and continuously and effectively cleaning waste plastics with different densities.

[0058] A liquid discharging and air drying assembly 200, which is used for intermittently discharging the cleaning liquid from the washed plastic blocks and effectively air drying the discharged plastic blocks, and the liquid discharging and air drying assembly 200 has the characteristic of small cleaning liquid loss.

[0059] An extrusion and pelletizing assembly 300, which is used for extruding plastic strips 319 from the air-dried plastic blocks and effectively pelletizing the extruded softened plastic strips 319.

[0060] A cooling assembly 400, which is used for water cooling the plastic pellets, and the cooling assembly 400 has the characteristic of small layout space.

[0061] In a further embodiment, as Figures 1 - 9As shown, the crushing and cleaning assembly 100 includes a cleaning cylinder 101 suspended and installed by a bracket. Above the cleaning cylinder 101, there is a double-shaft crushing device 111. In the upper part of the cleaning cylinder 101, there are several inclined vanes 105 evenly distributed circumferentially. Below the vanes 105, there are several first vortex-type drainage nets 106 coaxially arranged with the cleaning cylinder 101 and guiding the rotating cleaning liquid in the cleaning cylinder 101 to the corresponding row of first discharge ports 102 on the cylinder wall of the cleaning cylinder 101. On the convex surface of the first drainage net 106, there are several second drainage nets 107 guiding the rotating cleaning liquid into the first discharge ports 102. At the bottom of the cleaning cylinder 101, there is a bushing 103. Inside the bushing 103, a rotating shaft 109 connected to the first motor 108 on the bracket is arranged. At the upper end of the rotating shaft 109, there are several blades 110 circumferentially arranged. A partition net 104 is arranged between the blades 110 and the first drainage net 106.

[0062] In a further embodiment, as Figure 5 、 Figure 6 、 Figure 10 、 Figure 11 、 Figure 12 As shown, the liquid discharge and air drying assembly 200 includes several shells 201 corresponding one-to-one to the first drainage nets 106. The shells 201 are arranged on the outer wall of the cleaning cylinder 101 at the corresponding row of first discharge ports 102 of the corresponding first drainage nets 106. Inside the shell 201, there is a first baffle 204 hinged by a vertical first hinge shaft 205 and dividing the shell 201 into two parts of space and driven by a second motor 208. One side space of the first baffle 204 communicates with the corresponding row of first discharge ports 102. At the top and bottom of the other side space of the first baffle 204, there are a first air supply pipe 203 and a second discharge port 202 respectively. Inside the space on the side of the first discharge port 102 divided by the first baffle 204 in the shell 201, there are two second baffles 209 symmetrically hinged by a vertical second hinge shaft 210 and pushing the plastic blocks discharged from the first discharge ports 102 towards the first baffle 204 and driven by a third motor 214. At the end side of the second baffle 209, there is a fork part 223. The first air supply pipe 203 communicates with a second annular pipe 224. The second annular pipe 224 is connected to a first air pump 222 arranged on the outer wall of the cleaning cylinder 101 through a pipeline. The second discharge port 202 communicates with a first annular pipe 215 arranged on the outer wall of the cleaning cylinder 101. On the first annular pipe 215, there is an S-shaped first discharge pipe 216 communicated with it. The bottom wall surface of the lowest part of the first discharge pipe 216 is provided with dense first filter holes 217.

[0063] In a further embodiment, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 12As shown, the outer wall of the first discharge pipe 216 is provided with a first water tank 219 connected to the first filter hole 217 through a drainage channel 218, and the wall surface of the water tank is provided with a first liquid discharge pipe 220 for discharging liquid into the cleaning cylinder 101, and the first liquid discharge pipe 220 is provided with a first water pump 221.

[0064] In a further embodiment, Figure 13 As shown, a first gear 206 is disposed at the upper end of the first hinge shaft 205 , and the first gear 206 is meshed with a second gear 207 disposed on the output shaft of the second motor 208 on the housing 201 .

[0065] In a further embodiment, Figure 14 As shown, a third gear 211 is provided on the two second hinge shafts 210 corresponding to the two second baffles 209 in the shell 201, and the two third gears 211 are meshed with the two fourth gears 212 on the shell 201 one by one, and the two fourth gears 212 are transmission connected by two mutually meshing fifth gears 213, and the shaft where the fifth gear 213 is located is transmission connected to the third motor 214 on the shell 201.

[0066] In a further embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 16 , Figure 17 , Figure 18 , Figure 19 As shown, the extrusion pelletizing assembly 300 includes an extruder 320, the extrusion end of the extruder 320 is provided with a flaring sleeve 301, the lower end of the flaring sleeve 301 is provided with an extrusion plate 302, the extrusion plate 302 is provided with a plurality of rows of extrusion holes 303, the flaring sleeve 301 is provided with a frame 304, the frame 304 is symmetrically provided with two pairs of guide sleeves 305, each pair of the guide sleeves 305 is horizontally slidable with a slide bar 306, the two slide bars 306 are connected to a rack 308 through a connecting rod 307, the frame 304 is provided with a reciprocating drive assembly 310, the reciprocating drive assembly 310 A sixth gear 309 meshing with two racks 308 is provided on the output shaft of 10, and a plurality of double cutters 311 are arranged at intervals on the two slide bars 306. The double cutters 311 on the two slide bars 306 are staggered, and the gaps between adjacent double cutters 311 correspond to a corresponding row of extrusion holes 303 on the extrusion plate 302. Separation structures 321 are provided on the upper and lower sides of the double cutters 311 to prevent them from sticking to plastic pellets. A hopper 317 is provided below the double cutters 311, and the lower end of the hopper 317 is provided on the second discharge pipe 318 that guides the plastic pellets to the cooling assembly 400.

[0067] In a further embodiment,Figure 17 , Figure 18 , Figure 19 , Figure 20 As shown in Figure 17 , Figure 18 , Figure 19 , and Figure 20 , the separation structure 321 includes an air duct 312 that is as long as the double-sided cutter 311. The air duct 312 is disposed on the upper and lower sides of the double-sided cutter 311. The air duct 312 is connected to a second air pump 316 on a corresponding connecting rod 307 through a second air delivery pipe 315 buried in the double-sided cutter 311 and the slide bar 306. Exhaust ports 313 for sending air to the corresponding side blades of the corresponding double-sided cutter 311 are densely formed on both sides of the air duct 312.

[0068] In a further embodiment, as Figure 19 shown, guide plates 314 for horizontally moving the air discharged from the corresponding side exhaust ports 313 are disposed on both sides of the air duct 312.

[0069] In a further embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 21 shown, the cooling assembly 400 includes a spiral groove 401 suspended by a bracket. A straight groove 402 is disposed at the lower end of the spiral groove 401. Second filter holes 403 are densely formed at the middle bottom of the straight groove 402. A second water tank 404 communicating with the second filter holes 403 is disposed outside the bottom of the straight groove 402. A second liquid discharge pipe 405 for circulating the drained water to the upper end of the spiral groove 401 is disposed on the wall surface of the second water tank 404. A second water pump 406 is disposed on the second liquid discharge pipe 405.

[0070] In the present invention, the blade plates 105 evenly distributed circumferentially inside the cleaning cylinder 101 of the crushing and cleaning assembly 100 can guide the waste plastic blocks with different densities, which are crushed by the twin-shaft crushing device 111, reach the liquid level of the cleaning liquid, and rotate with the cleaning liquid, into the cleaning liquid for effective cleaning, avoiding the ineffective cleaning of the plastic blocks with a density less than that of water due to floating on the liquid surface during the cleaning process. In the crushing and cleaning assembly of the present invention, the vortex-shaped first drainage net 106 located below the blade plates 105 and evenly distributed circumferentially inside the cleaning cylinder 101 enables the cleaned plastic blocks that enter the cleaning liquid and rotate with the cleaning liquid to move along the first drainage net 106 towards the four rows of first discharge ports 102 on the wall surface of the cleaning cylinder 101. The several second drainage nets 107 provided on the first drainage net 106 then precisely guide the cleaned plastic blocks moving along the first drainage net 106 to the respective first discharge ports 102 in the corresponding row and enable the cleaned plastic blocks to enter the corresponding housing 201 of the liquid discharge and air drying assembly 200 through the first discharge ports 102. The plastic blocks that enter the corresponding housing 201 are discharged from the cleaning liquid under the interaction of the corresponding two second baffles 209 and the first baffle 204. The plastic blocks discharged from the cleaning liquid are blown through the first discharge pipe 216 to the extrusion and pelletizing assembly 300 under the blowing of the dry air sent by the upper first air pump 222. The first filter holes 217 at the bottom of the first discharge pipe 216 can filter out the cleaning liquid in the plastic blocks and recycle it. The dry air sent by the first air pump 222 can effectively air-dry the plastic blocks from which the cleaning liquid has been filtered during the movement of the plastic blocks in the first discharge pipe 216, ensuring that the crushing and cleaning assembly 100 can continuously and uninterruptedly clean the plastic blocks and effectively improving the cleaning efficiency of the plastic blocks. In the present invention, the extrusion and pelletizing assembly 300 and the cooling assembly 400 can first pelletize the plastic strip 319 after extruding the plastic into the plastic strip 319 and then perform water cooling on the plastic pellets. The spiral grooves 401 in the cooling assembly 400 can perform spiral water cooling on a large number of continuously entering plastic pellets, effectively saving the layout space of the cooling equipment. In the present invention, the two groups of double knives 311 of the extrusion and pelletizing assembly 300 can effectively pelletize the plastic strip 319 that is just extruded and still in a softened state. The air channels 312 on the upper and lower sides of the double knives 311 can effectively blow the cut softened plastic pellets away from the knives, preventing the softened plastic pellets from adhering to the double knives 311 and effectively completing the high-efficiency pelletizing of the softened plastic strip 319.

[0071] The operation process of the present invention is as follows:

[0072] In the initial state, as Figure 15 shown, the two second baffles 209 in each housing 201 of the liquid discharge and air drying assembly 200 are in an open state and the movable ends of the second baffles 209 are located on one side of the corresponding first discharge port 102, and the first baffle 204 is in a closed state. As Figure 22As shown, the adjacent double knives 311 in the extrusion granulation assembly 300 are in an open state. In the initial state, an appropriate amount of cleaning liquid is filled in the cleaning cylinder 101. The space on the side of the first discharge port 102 of the housing 201 in the liquid discharge and air drying assembly 200 is filled with the cleaning liquid.

[0073] When the present invention is needed to crush, clean and extrude waste plastics into pellets, first, water is injected into the spiral groove 401 from the top of the spiral groove 401 in the cooling assembly 400 and the second water pump 406 is started simultaneously, ensuring that there is always water flowing in the spiral groove 401 in the cooling assembly 400, and the water reaching the straight groove 402 enters the second water tank 404 through the second filter hole 403, and the second water pump 406 discharges the water in the second water tank 404 into the spiral groove 401 in a circulating manner. At the same time, the first motor 108 is started, so that the first motor 108 drives the blade 110 to rotate through the rotating shaft 109, and the blade 110 drives the cleaning liquid in the cleaning cylinder 101 to rotate and tumble up and down like the water in a pulsator washing machine. The partition net 104 can effectively prevent the solid particles in the upper cleaning liquid from entering the blade 110 and causing damage to the blade 110.

[0074] Then, the waste plastics with different densities are crushed into plastic blocks by the twin - shaft crushing device 111, and the plastic blocks with different densities continuously fall into the cleaning cylinder 101. The tumbling and rotating cleaning liquid drives the plastic blocks to tumble and rotate. The plastic blocks with a density less than that of water tumbling and rotating with the cleaning liquid enter the cleaning liquid under the guidance of the vane 105 for effective cleaning, while the plastic blocks with a density greater than that of water sink into the cleaning liquid by themselves to complete effective cleaning.

[0075] The plastic blocks that have been cleaned in the cleaning liquid move towards the first discharge port 102 on the barrel wall of the cleaning cylinder 101 under the drive of the cleaning liquid and the guidance of the first drainage net 106 and the second drainage net 107 on the first drainage net 106, and enter the housing 201 of the liquid discharge and air drying assembly 200 through the first discharge port 102. The plastic blocks entering the housing 201 gradually gather between the two second baffles 209. When the plastic blocks between the two second baffles 209 in the housing 201 reach a certain amount, all the third motors 214 are started. Each third motor 214 drives the two second baffles 209 to close through the corresponding fifth gear 213, fourth gear 212, third gear 211 and second hinge shaft 210. The fork parts 223 of the two second baffles 209 cross each other and push the plastic blocks concentrated in the housing 201 into the closed space formed by the first baffle 204 and the two second baffles 209. At the same time, it blocks the plastic blocks and the cleaning liquid continuously entering the housing 201 from the first discharge port 102 from entering between the two second baffles 209, so that the two second baffles 209 seal the space at the first discharge port 102 and prevent the cleaning liquid in the cleaning cylinder 101 from leaking.

[0076] Then, start the second motor 208. The second motor 208 drives the first baffle 204 to open through the second gear 207 and the first hinge shaft 205. The plastic blocks and the cleaning liquid originally located in the closed space formed by the first baffle 204 and the two second baffles 209 fall to the second discharge port 202 at the bottom of the housing 201. Then, start the first air pump 222. The first air pump 222 blows dry air into the housing 201 through the second annular pipe 224 and the first air supply pipe 203. The dry air entering the housing 201 blows the plastic blocks in the second discharge port 202 at the bottom of the housing 201 into the first discharge pipe 216 through the first annular pipe 215. The plastic blocks entering the first discharge pipe 216 enter the extruder 320 under the blowing of the first air pump 222.

[0077] During the movement of the plastic blocks in the first discharge pipe 216, when the plastic blocks reach the first filter hole 217 at the lowest part of the first discharge pipe 216, the cleaning liquid in the plastic blocks enters the first water tank 219 through the first filter hole 217. The plastic blocks after removing the cleaning liquid are effectively air-dried under the action of the dry air blown by the first air pump 222. The air-dried plastic blocks enter the extruder 320 for extrusion.

[0078] When the cleaning liquid in the first water tank 219 reaches a certain amount, start the first water pump 221. The first water pump 221 circulates and recovers the cleaning liquid in the first water tank 219 to the cleaning cylinder 101 through the first drain pipe 220. When the plastic blocks in the second discharge port 202 in the housing 201 are completely discharged, the first air pump 222 stops running. Start the second motor 208. The second motor 208 drives the first baffle 204 to reset and close through a series of transmissions. After the first baffle 204 is closed, start the third motor 214. The third motor 214 drives the two second baffles 209 in the housing 201 to reset and open through a series of transmissions. It should be noted here that the gap size of the fork part 223 at the end of the second baffle 209 is smaller than the minimum particle size of the plastic blocks, so as to ensure that the fork part 223 of the second baffle 209 can effectively push the plastic blocks in the cleaning liquid into the space formed by the first baffle 204 and the two second baffles 209 during its closing process. After the second baffle 209 is opened and reset, a small amount of plastic blocks enter the triangular space formed by the second baffle 209, the wall surface of the housing 201 and the wall surface of the cleaning cylinder 101 without affecting the operation of the second baffle 209. At the same time, only a small amount of the plastic blocks in the cleaning liquid enter the triangular space formed by the second baffle 209, the wall surface of the housing 201 and the wall surface of the cleaning cylinder 101 under the disturbance of the cleaning liquid during the opening and resetting process of the two second baffles 209.

[0079] After the two second baffles 209 in the housing 201 are completely opened and reset, the plastic blocks that have been cleaned in the cleaning cylinder 101 continue to move into the housing 201 through the first discharge port 102 for accumulation.

[0080] As Figure 22 shown, the extruder 320 in the extrusion granulation assembly 300 melts and extrudes the dry and clean plastic blocks from the first discharge pipe 216. The extruded molten plastic is formed into plastic strips 319 in a softened state through the extrusion holes 303 on the extrusion plate 302 at the lower end of the flaring sleeve 301. When the plastic strips 319 pass a certain distance after the two double knives 311 on both sides thereof, the reciprocating drive assembly 310 is started. The reciprocating drive assembly 310 drives the two groups of double knives 311 on the two slide rods 306 to reciprocate through the sixth gear 309 and the two racks 308 and granulates the plastic strips 319 in a softened state. When the two adjacent double knives 311 complete the granulation of the plastic strips 319, the second air pump 316 sends air into the two air channels 312 on the upper and lower sides of the double knives 311 through the second air delivery pipe 315. The air entering the two air channels 312 on the upper and lower sides of the double knives 311 is horizontally blown out respectively through the exhaust ports 313 on both sides of the corresponding air channels 312 and guided by the corresponding side guide plates 314. The air horizontally blown out from both sides of the air channels 312 blows the plastic particles cut by the double knives 311 away from the blades of the double knives 311, preventing the plastic particles still in a softened state from adhering to the double knives 311 and enabling a relatively hard skin to be initially formed on the outer sides of the plastic particles by cooling, and preventing the plastic particles from reaching the hopper 317 concentratedly and adhering to each other.

[0081] The plastic particles generated by the extrusion granulation assembly 300 and still in a softened state fall into the hopper 317. The plastic particles entering the hopper 317 enter the cold water in the spiral groove 401 through the second discharge pipe 318. The plastic particles are spirally moved along the spiral groove 401 by the water flow to the straight groove 402 and are effectively cooled and shaped. When the plastic particles reaching the straight groove 402 pass through the second filter holes 403, all the cold water in the straight groove 402 enters the second water tank 404 through the filter holes to complete the water removal of the plastic particles. The plastic particles with water removed in the straight groove 402 roll down along the straight groove 402 into the plastic particle centralized recovery container.

Claims

1. A plastic pipe recycled material pelletizing equipment, used for crushing, cleaning and extrusion pelletizing of waste plastics, characterized in that, Including: A crushing and cleaning component, used for crushing and continuously and effectively cleaning waste plastics of different densities; A liquid discharging and air drying component, used for intermittently discharging the cleaned plastic blocks from the cleaning liquid and effectively air drying the discharged plastic blocks, and the liquid discharging and air drying component has the characteristic of small cleaning liquid loss; An extrusion and pelletizing component, used for extruding plastic strips from the air-dried plastic blocks and effectively pelletizing the extruded softened plastic strips; A cooling component, used for water cooling the plastic pellets, and the cooling component has the characteristic of small layout space; The crushing and cleaning component includes a cleaning cylinder suspended and installed by a bracket. Above the cleaning cylinder, there is a double-shaft crushing device. In the upper part of the cleaning cylinder, there are several inclined vane plates evenly distributed in the circumferential direction. Below the vane plates, there are several first vortex-type drainage nets coaxially arranged with the cleaning cylinder and guiding the rotating cleaning liquid in the cleaning cylinder to the corresponding row of first discharge ports on the cylinder wall of the cleaning cylinder. On the convex surface of the first drainage net, there are several second drainage nets guiding the rotating cleaning liquid into the first discharge ports. At the bottom of the cleaning cylinder, there is a bushing. Inside the bushing, a rotating shaft connected to the first motor on the bracket is arranged. At the upper end of the rotating shaft, there are several blades circumferentially arranged. A partition net is arranged between the blades and the first drainage net; The liquid discharging and air drying component includes several shells corresponding one by one to the first drainage nets. The shells are arranged on the outer wall of the cleaning cylinder at the corresponding row of first discharge ports corresponding to the first drainage nets. Inside the shell, there is a first baffle hinged by a vertical first hinge shaft, which divides the shell into two parts of space and is driven by a second motor. One side space of the first baffle communicates with the corresponding row of first discharge ports. At the top and bottom of the other side space of the first baffle, there are a first air supply pipe and a second discharge port respectively. Inside the space on the first discharge port side of the shell divided by the first baffle, there are two second baffles symmetrically hinged by a vertical second hinge shaft, which push the plastic blocks discharged from the first discharge port towards the first baffle and are driven by a third motor. A fork part is arranged at the end side of the second baffle. The first air supply pipe communicates with a second annular pipe. The second annular pipe is connected to a first air pump arranged on the outer wall of the cleaning cylinder through a pipeline. The second discharge port communicates with a first annular pipe arranged on the outer wall of the cleaning cylinder. An S-shaped first discharge pipe communicated with the first annular pipe is arranged on the first annular pipe. The bottom wall surface of the first discharge pipe is provided with a dense first filter hole.

2. The plastic pipe regrind pelletizing equipment according to claim 1, characterized in that, On the outer wall of the first discharge pipe, there is a first water tank communicated with the first filter hole through a drainage channel. The wall surface of the water tank is provided with a first liquid discharge pipe for discharging liquid into the cleaning cylinder. A first water pump is arranged on the first liquid discharge pipe.

3. The plastic pipe regrind pelletizing equipment according to claim 1, characterized in that, At the upper end of the first hinge shaft, there is a first gear, which meshes with a second gear arranged on the output shaft of the second motor on the shell.

4. A plastic pipe regrind pelletizing device according to claim 1, characterized in that A third gear is provided on the two second hinge shafts corresponding to the two second baffles in the shell, and the two third gears are meshed with the two fourth gears on the shell one by one. The two fourth gears are connected by two fifth gears meshing with each other, and the shaft where the fifth gear is located is connected to the third motor on the shell.

5. A plastic pipe regrind pelletizing device according to claim 1, characterized in that, The extrusion pelletizing assembly comprises an extruder, the extrusion end of the extruder is provided with a flaring sleeve, the lower end of the flaring sleeve is provided with an extrusion plate, a plurality of rows of extrusion holes are opened on the extrusion plate, the flaring sleeve is provided with a frame, two pairs of guide sleeves are symmetrically provided on the frame, a sliding rod is horizontally slidable in each pair of the guide sleeves, the two sliding rods are connected with racks through connecting rods, a reciprocating drive assembly is provided on the frame, a sixth gear meshing with the two racks is provided on the output shaft of the reciprocating drive assembly, a plurality of double-man cutters are arranged at intervals on the two sliding rods, the double-man cutters on the two sliding rods are staggered, and the gaps between adjacent double-man cutters correspond to a corresponding row of extrusion holes on the extrusion plate, the upper and lower sides of the double-man cutters are provided with separation structures to prevent them from sticking to plastic pellets, a hopper is provided below the double-man cutter, and the lower end of the hopper is provided on the second discharge pipe that guides the plastic pellets to the cooling assembly.

6. The plastic pipe regrind pelletizing equipment according to claim 5, characterized in that, The separation structure includes an air duct of the same length as the double-man cutter, and the air duct is arranged on the upper and lower sides of the double-man cutter. The air duct is connected to the second air pump on the corresponding connecting rod through a second air supply pipe buried in the double-man cutter and the sliding rod. Exhaust ports for supplying air to the corresponding side blades of the corresponding double-man cutter are densely distributed on both sides of the air duct.

7. The plastic pipe regrind pelletizing equipment according to claim 6, characterized in that, Both sides of the air passage are provided with guide plates for causing the air discharged from the corresponding side exhaust ports to move horizontally.

8. The plastic pipe recycled material pelletizing equipment according to claim 1, characterized in that, The cooling component includes a spiral groove suspended by a bracket, a straight groove is provided at the lower end of the spiral groove, second filter holes are densely distributed at the middle bottom of the straight groove, a second water tank connected to the second filter holes is provided on the outer side of the bottom of the straight groove, a second drainage pipe for circulating water to the upper end of the spiral groove is provided on the wall surface of the second water tank, and a second water pump is provided on the second drainage pipe.

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