CN110667079A

CN110667079A - Water-saving cooling method for waste plastic foam recovery granulation

Info

Publication number: CN110667079A
Application number: CN201910918512.9A
Authority: CN
Inventors: 丁先虎
Original assignee: Lu'an Zhenghui Youchan Electromechanical Technology Co Ltd
Current assignee: Foshan Runqianyu Intellectual Property Service Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-01-10
Anticipated expiration: 2039-09-26
Also published as: CN110667079B

Abstract

The invention provides a water-saving cooling method for recovering and granulating waste plastic foam, which comprises the following steps: firstly, extruding and inserting molten strip-shaped plastic into a water-cooled pipe by a plastic granulator and extending towards a bent pipe; then, the water tank supplies normal-temperature cold water to the water chamber on the input disc, the normal-temperature cold water flows from the input disc to the output disc through the water cooling pipe, the normal-temperature cold water is in full contact with the molten strip-shaped plastic for heat exchange, and the normal-temperature cold water is converted into high-temperature hot water; then, high-temperature hot water flows into the turbine heat dissipation mechanism, the turbine heat dissipation mechanism conducts heat dissipation treatment on the high-temperature hot water and enables the high-temperature hot water to be converted into low-temperature hot water, the low-temperature hot water flows into the heat exchange heat dissipation mechanism, the heat exchange heat dissipation mechanism conducts heat dissipation treatment on the low-temperature hot water and enables the low-temperature hot water to be converted into normal-temperature cold water, and finally the normal-temperature cold water is discharged into the water tank to be recycled; in the above steps, the cooled hard plastic strip is discharged from an output port on the extrusion disc, and the hard plastic strip extruded by the granulating device is granulated.

Description

Water-saving cooling method for waste plastic foam recovery granulation

Technical Field

The invention relates to the technical field of plastic granulation, in particular to a water-saving cooling method for recycling and granulating waste plastic foam.

Background

The plastic granulator is widely applied to plastic regeneration processing production equipment, and is suitable for regeneration processing operation of common plastics in daily production and life, such as convenient bags, packaging films, hand bags, beverage bottles, plastic basins, plastic buckets and the like, in the regeneration processing process, firstly, plastic products are subjected to high-temperature melting, then, the plastic products are extruded by a machine head (mostly in the form of molten strip-shaped plastic extrusion), then, the extruded molten strip-shaped plastic is cooled to convert the molten strip-shaped plastic into hard strip-shaped plastic, and finally, granules are recycled, wherein the cooling of the extruded molten strip-shaped plastic is particularly important, and in the current stage, the cooling mode is usually water cooling, but the current water cooling has the defects that the extruded plastic strips are cooled by normal-temperature cold water at one time, the normal-temperature cold water cannot be recycled, and water resources are wasted, in order to overcome the above disadvantages, the present invention needs to provide a water-saving cooling method for plastic pelletizer with smart structure, simple principle and convenient use.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide the water-saving cooling method of the plastic granulator, which has the advantages of ingenious structure, simple principle and convenient use.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.

The water-saving cooling method for recovering and granulating the waste plastic foam comprises the following steps:

(I) an extrusion stage;

s1: the molten strip-shaped plastic is extruded from an extrusion hole of the plastic granulator and is inserted into a water cooling pipe in the cooling device, and the molten strip-shaped plastic gradually extends towards the bent pipe along the water cooling pipe;

the cooling device comprises a first vertical plate and a second vertical plate which are vertically and oppositely arranged, a connecting plate fixedly connected with the first vertical plate and the second vertical plate is arranged between the first vertical plate and the second vertical plate, the connecting plate is positioned on the side surface of the first vertical plate and the second vertical plate and is arranged close to the top of the first vertical plate and the second vertical plate, a middle vertical plate positioned between the first vertical plate and the second vertical plate is fixedly arranged on the connecting plate and is arranged close to the second vertical plate, the connecting plate further comprises two coaxially arranged butt-joint discs, one butt-joint disc is fixedly arranged on the middle vertical plate and is an output disc, the other butt-joint disc is connected with the extrusion end of the plastic granulator and is an input disc, the input disc is positioned on the outer side of the first vertical plate, which is far away from the end of the middle vertical plate, an external first boss is coaxially and fixedly arranged on the outer circumferential surface of the butt-joint discs, the end faces of the first installation groove and the second installation groove are mutually deviated from each other, a first butt joint parallel to the axial direction of the first installation groove is arranged in the first installation groove, the first butt joint is communicated with the first butt joint hole, the first butt joint hole is provided with a plurality of extrusion holes which are aligned with the plastic granulator one by one, the first butt joint hole on the input disc is communicated with the extrusion holes of the plastic granulator in a sealing and butt joint mode, a water cooling pipe used for connecting and communicating the first butt joint hole on the input disc and the extrusion holes on the extrusion disc is arranged between the first butt joint hole on the input disc and the extrusion holes on the extrusion disc, the water cooling pipe movably penetrates through the first vertical plate;

an annular groove is coaxially formed in the outer circular surface of the butt joint disc, a sealing ring which is in sealing connection and matching with the groove opening of the annular groove is arranged at the groove opening of the annular groove, the annular groove and the sealing ring jointly form a water cavity, and a connecting hole which is radially arranged along the butt joint disc and is communicated with the water cavity and the butt joint hole is formed between the water cavity and the butt joint hole;

the cooling device also comprises an extrusion disc fixedly arranged on the second vertical plate, the axial direction of the extrusion disc is parallel to the axial direction of the butt joint disc, the axial line of the extrusion disc is positioned right above the axial line of the butt joint disc, the outer circular surface of the extrusion disc is coaxially and fixedly provided with an external boss two, the external boss two is fixedly connected with the second vertical plate, one end surface of the extrusion disc, which is close to the butt joint disc, is coaxially provided with a circular mounting groove two, the mounting groove two is internally provided with a plurality of butt joints two which are arranged in parallel to the axial direction of the extrusion disc, the butt joints two are provided with a plurality of butt joints one by one and matched with the butt joint one on the output disc, the axial lines of the butt joints two which are mutually matched are positioned right above the butt joint one, a bent pipe for connecting and communicating the two is arranged between the butt joint two and the butt joint one, the bent pipe comprises a horizontal section two which is coaxially communicated with the butt joint two, a horizontal, the inclination angle of the inclined section of the bent pipe is larger than 30 degrees and smaller than 45 degrees, the inclined section is gradually upwards tilted from the horizontal section I to the horizontal section II, the end face, deviating from the butt joint disc, of the extrusion disc is set into a grain cutting end face, and output holes which are communicated with the butt joint heads II in a one-to-one correspondence mode are formed in the grain cutting end face;

(II) a cooling circulation stage;

s2: the water tank supplies normal-temperature cold water to the water chamber on the input disc, the normal-temperature cold water enters the butt joint hole from the connecting hole and then enters the water cooling pipe from the butt joint hole, the normal-temperature cold water flows from the input disc to the output disc along the water cooling pipe, meanwhile, the normal-temperature cold water is fully contacted with the molten strip-shaped plastic, the molten strip-shaped plastic guides heat into the normal-temperature cold water, and the temperature of the normal-temperature cold water rises and is converted into high-temperature hot water;

the water tank is fixedly arranged between the first vertical plate and the second vertical plate, a water cavity on the input disc is connected with a water inlet pipe which is vertically and downwardly arranged, a water discharge pipe which is vertically and downwardly arranged is connected with a water cavity on the output disc, the water tank is arranged in a rectangular structure and is hermetically arranged, a first water pump is fixedly arranged on the upper end surface of the water tank, the input end of the first water pump is inserted into the water tank and extends to the bottom of the first water pump, the output end of the first water pump is communicated with the water inlet pipe, the output end of the water discharge pipe is communicated with the input end of the heat dissipation device, and the output end;

in the working process of the water tank, a first water pump is started, normal-temperature cold water in the water tank is pumped out by the water pump and is conveyed into a water cavity on the input disc through the water inlet pipe, the normal-temperature cold water flows from the input disc to the output disc through the water cooling pipe and enters the water cavity on the output disc, the normal-temperature cold water is converted into high-temperature hot water in the process, and the high-temperature hot water flows into the heat dissipation device through the water drainage pipe;

s3: high-temperature hot water enters the water chamber on the output disc through the connecting hole, then the high-temperature hot water flows into a turbine heat dissipation mechanism in the heat dissipation device, and the turbine heat dissipation mechanism performs heat dissipation treatment on the high-temperature hot water and converts the high-temperature hot water into low-temperature hot water;

the turbine heat dissipation mechanism comprises a fixing plate fixedly connected with the side face of a water tank, a fixing cylinder with openings at the upper end and the lower end is fixedly installed on the fixing plate, the fixing cylinder is located below a water discharge pipe and is coaxially arranged with the water discharge pipe, a circular fixing frame with circular and hollow-out arrangement is fixedly arranged at the upper end and the lower end of the fixing cylinder, a rotating cylinder is coaxially and rotatably arranged in the fixing cylinder, circular end covers which are in sealing connection and matching with the rotating cylinder are coaxially and fixedly arranged at the openings at the upper end and the lower end of a hand-held rotating cylinder, the end covers are rotatably connected and matched with the fixing frame, a rectangular cooling fin I is fixedly arranged on the inner circular surface of the rotating cylinder, the length direction of the cooling fin I is parallel to the axial direction of the rotating cylinder, the width direction of the cooling fin I deviates from the radial direction of the rotating cylinder by more than, the outer circular surface of the rotating cylinder is fixedly provided with a second rectangular radiating fin, the length direction of the second rectangular radiating fin is parallel to the axial direction of the rotating cylinder, the width direction of the second rectangular radiating fin deviates from the radial direction of the rotating cylinder by an angle larger than 20 degrees and smaller than 40 degrees, the second rectangular radiating fin extends from the top of the rotating cylinder to the bottom of the rotating cylinder, a plurality of second rectangular radiating fins are arranged in an array mode along the circumferential direction of the rotating cylinder, and the rotating cylinder, the first rectangular radiating fin and the second rectangular radiating fin are made of copper;

the spindle is coaxially arranged on the rotating cylinder, the upper end and the lower end of the spindle penetrate through the end cover and the fixing frame, the spindle is fixedly connected with the end cover in a sealing manner, the spindle is matched with the fixing frame in a rotating manner, a cylindrical water inlet cavity is vertically and downwards coaxially formed in the top end of the spindle and extends into the rotating cylinder, a conical disc is coaxially and fixedly sleeved on the spindle and fixedly connected with the spindle into a whole, the distance between conical surfaces of the conical disc is gradually increased from top to bottom along the vertical direction, the conical disc is positioned above the second radiating fin, an annular water tank which is coaxially arranged with the spindle and has an upward opening is formed in the middle of the conical surface of the conical disc along the inclination direction of the conical surface, communication holes which are used for communicating the conical surface and the water inlet cavity and are radially arranged along the spindle are formed in the bottom of the water tank and the bottom of the, an air outlet communicated with the inside of the fixed cylinder is formed in the outer circular surface of the fixed cylinder, openings formed in the upper end and the lower end of the fixed cylinder and the rotating cylinder are air inlets, high-temperature hot water uniformly overflows from the conical surface of the conical disc and is sprinkled onto the first radiating fin, the high-temperature hot water and the first radiating fin finish heat exchange, the first radiating fin transfers heat to the second radiating fin, the heat on the second radiating fin is dissipated to the air by driving the rotating cylinder to rotate, and the high-temperature hot water is converted into low-temperature hot water and flows into the bottom of the rotating cylinder;

a cylindrical drainage water cavity is coaxially formed in the bottom end of the main shaft vertically upwards, the drainage water cavity extends into the rotating cylinder, a communicating groove used for connecting and communicating the drainage water cavity and the rotating cylinder is formed between the drainage water cavity and the bottom of the rotating cylinder, and the communicating grooves are arranged in an array mode along the circumferential direction where the main shaft is located;

in the working process of the turbine heat dissipation mechanism, high-temperature hot water discharged by a water discharge pipe flows into a water inlet cavity, then the high-temperature hot water flows into a water tank through a communication hole, the high-temperature hot water overflows from a notch of the water tank and uniformly slides along the conical surface of a conical disc to the periphery, the high-temperature hot water is uniformly sprinkled on a first heat radiating fin and slides to the bottom of the first heat radiating fin from the top of the first heat radiating fin, the high-temperature hot water exchanges heat with the first heat radiating fin and transfers the heat to the first heat radiating fin, the first heat radiating fin transfers the heat to a second heat radiating fin, the high-temperature hot water is converted into low-temperature hot water and gathers at the bottom of a rotary cylinder, and flows into a water discharge cavity from the communication groove, meanwhile, a belt transmission assembly II transmits power on an output shaft of a heat dissipation motor to a main shaft and drives the main shaft to rotate, the main shaft drives the, the air enters the radiating area from the air inlet and is discharged from the discharge port, and the second radiating fins exchange heat with the air to quickly dissipate heat on the second radiating fins into the air;

s4: the low-temperature hot water discharged by the turbine heat dissipation mechanism enters the heat exchange heat dissipation mechanism, the heat exchange heat dissipation mechanism carries out heat dissipation treatment on the low-temperature hot water and converts the low-temperature hot water into normal-temperature cold water, and finally the normal-temperature cold water is discharged into the water tank for cyclic utilization;

the heat exchange heat dissipation mechanism comprises a low-temperature hot water pipeline and a normal-temperature cold water pipeline which are symmetrically arranged up and down and transversely arranged, the low-temperature hot water pipeline is positioned right below the normal-temperature cold water pipeline and is a square pipeline, the low-temperature hot water pipeline is fixedly arranged on the upper end surface of the water tank, the low-temperature hot water pipeline and the normal-temperature cold water pipeline are both hard guide pipes, a plurality of copper heat dissipation pipes are vertically arranged between the low-temperature hot water pipeline and the normal-temperature cold water pipeline, the heat dissipation pipes are arranged in an array mode along the length direction of the low-temperature hot water pipeline, each heat dissipation pipe comprises an inner pipe and an outer pipe which are mutually isolated, the inner pipes are connected and communicated with the low-temperature hot water pipeline and the normal-temperature cold water pipeline, the input end of the second water pump is coaxially sleeved on the bottom end of the, one end of the normal-temperature cold water pipeline is communicated with a return pipe, the output end of the return pipe is inserted into the water tank, and the other end of the normal-temperature cold water pipeline is arranged in a closed manner;

the heat exchange heat dissipation mechanism further comprises a first external pipe, a second external pipe, a first tap water pipe and a second tap water pipe, the first external pipe is positioned under the second external pipe, the length direction of the first external pipe is parallel to the length direction of the low-temperature hot water pipeline, the first external pipe and the second external pipe are arranged close to each other, the outer circular surface of the first external pipe is connected and communicated with the bottom of the outer pipe, one end of the first external pipe is connected and communicated with the output end of the first tap water pipe, the other end of the first external pipe is arranged in a closed manner, the length direction of the second external pipe is parallel to the length direction of the low-temperature hot water pipeline, the two external pipes are arranged close to each other, the outer circular surface of the second external pipe is connected and communicated with the top of the outer pipe, one end of the second external pipe is connected and communicated with the;

the water consumption in a factory is extremely high, therefore, tap water in a tap water conveying pipeline flows continuously, a heat exchange heat dissipation mechanism is in the working process, a second water pump pumps low-temperature hot water in a drainage water cavity into a low-temperature hot water pipeline, the low-temperature hot water flows upwards through an inner pipe, in the process, the low-temperature hot water and the tap water in an outer pipe complete heat exchange and are converted into normal-temperature cold water to enter a normal-temperature cold water pipeline, and then the normal-temperature cold water flows into a water tank through a return pipe;

(III) granulating;

s5: and discharging the cooled strip-shaped hard plastic from an output port on the extrusion disc, and pelletizing the strip-shaped hard plastic extruded by the pelletizing device.

Compared with the prior art, the water tank has the advantages that the water tank is ingenious in structure, simple in principle and convenient and fast to use, normal-temperature cold water in the water tank is pumped out and is in direct contact with extruded molten strip-shaped plastic, the molten strip-shaped plastic is cooled by water, heat exchange is carried out between the molten strip-shaped plastic and the normal-temperature cold water, the normal-temperature cold water is converted into high-temperature hot water, then the high-temperature hot water is subjected to heat dissipation and cooling treatment and is converted into normal-temperature cold water, the normal-temperature cold water is pumped back into the water tank.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a schematic view of the overall structure of the present invention.

Fig. 4 is a schematic view of the overall structure of the present invention.

Fig. 5 is a schematic diagram of the overall explosion of the present invention.

Fig. 6 is a partial structural schematic diagram of the present invention.

Fig. 7 is a schematic structural view of the cooling device.

Fig. 8 is a partial structural view of the cooling device.

Fig. 9 is a partially exploded view of the cooling device.

Fig. 10 is a partial structural view of the cooling device.

Fig. 11 is a partial structural view of a cooling device.

Fig. 12 is a partial structural view of the cooling device.

Fig. 13 is a partial structural view of the cooling device.

Fig. 14 is a partial structural view of the cooling device.

Fig. 15 is a partial structural view of the cooling device.

Fig. 16 is a schematic view of a structure of a bent tube.

Fig. 17 is a partial structural view of the cooling device.

Fig. 18 is a partial structural view of the cooling device.

Fig. 19 is a partial structural view of the cooling device.

Fig. 20 is a view showing the water tank and the cooling device in cooperation.

Fig. 21 is a view showing the water tank and the cooling device in cooperation.

Fig. 22 is a view showing a combination of the dicing apparatus and the cooling apparatus.

Fig. 23 is a view showing a combination of the dicing apparatus and the cooling apparatus.

Fig. 24 is a schematic view of the structure of the dicing apparatus.

Fig. 25 is a partial structural view of the dicing apparatus.

Fig. 26 is a view showing the combination of the heat sink, the cooling device and the water tank.

Fig. 27 is a view showing a heat sink and a cooling device.

Fig. 28 is a view showing the turbine heat dissipating mechanism in cooperation with a drain pipe.

Fig. 29 is a schematic structural view of a turbine heat dissipation mechanism.

Fig. 30 is a partial exploded view of the turbine heat dissipation mechanism.

Fig. 31 is a schematic view of the internal structure of the turbine heat dissipation mechanism.

Fig. 32 is a schematic view of the internal structure of the turbine heat dissipation mechanism.

Fig. 33 is a partial structural schematic view of the turbine heat dissipation mechanism.

Fig. 34 is a partial sectional view of the turbine heat dissipation mechanism.

Fig. 35 is a partial sectional view of the turbine heat dissipation mechanism.

Fig. 36 is a partial structural schematic view of a turbine heat dissipation mechanism.

Fig. 37 is a schematic structural view of a turbine heat dissipation mechanism.

Fig. 38 is a view showing a turbine heat dissipation mechanism in cooperation with a cooling device.

Fig. 39 is a connection diagram of the second water pump, the turbine heat dissipation mechanism, and the heat exchange heat dissipation mechanism.

Fig. 40 is a schematic structural view of a heat exchange heat dissipation mechanism.

Fig. 41 is a partial sectional view of the heat exchange heat dissipation mechanism.

Fig. 42 is a partial structural view of a heat exchange heat dissipation mechanism.

Detailed Description

(I) an extrusion stage;

s1: the molten plastic strand, which is extruded from the extrusion holes of the pelletizer and inserted into the water-cooled tube 115 in the cooling device 100, will gradually extend along the water-cooled tube 115 toward the bent tube 125;

(II) a cooling circulation stage;

s2: the water tank 200 supplies normal-temperature cold water to the water chamber on the input tray, the normal-temperature cold water enters the butt joint hole 112 from the connecting hole 118 and then enters the water cooling pipe 115 from the butt joint hole 112, the normal-temperature cold water flows from the input tray to the output tray along the water cooling pipe 115, meanwhile, the normal-temperature cold water is fully contacted with the molten strip-shaped plastic, the molten strip-shaped plastic guides heat into the normal-temperature cold water, and the temperature of the normal-temperature cold water rises and is converted into high-temperature hot water;

in the working process of the water tank 200, the first water pump 210 is started, the water pump 210 pumps the normal-temperature cold water in the water tank 200 and conveys the normal-temperature cold water into the water cavity on the input disc through the water inlet pipe 201, the normal-temperature cold water flows from the input disc to the output disc through the water cooling pipe 115 and enters the water cavity on the output disc, in the process, the normal-temperature cold water is converted into high-temperature hot water, and the high-temperature hot water flows into the heat dissipation device 400 through the water discharge pipe 202;

s3: the high-temperature hot water enters the water chamber on the output disc through the connecting hole 118, and then flows into the turbine heat dissipation mechanism 410 in the heat dissipation device 400, and the turbine heat dissipation mechanism 410 performs heat dissipation treatment on the high-temperature hot water and converts the high-temperature hot water into low-temperature hot water;

during the operation of the turbine heat dissipation mechanism 410, the high temperature hot water discharged from the water discharge pipe 202 flows into the water inlet cavity 415a, then the high temperature hot water flows into the water tank 416b through the communication hole 416c, the high temperature hot water overflows from the notch of the water tank 416b and slides uniformly around along the tapered surface of the tapered disk 416a, the high temperature hot water sprinkles uniformly on the first heat dissipation fins 413a and slides from the top of the first heat dissipation fins 413a to the bottom thereof, the high temperature hot water exchanges heat with the first heat dissipation fins 413a and transfers the heat to the first heat dissipation fins 413a, the first heat dissipation fins 413a transfer the heat to the second heat dissipation fins 413b, the high temperature hot water is converted into low temperature hot water and gathers at the bottom of the rotary cylinder 413, and flows into the water discharge cavity 415b through the communication groove 415c, and at the same time, the second belt transmission assembly 419 transfers the power on the output shaft of the heat dissipation motor 418 to the main shaft 415 and drives the main shaft 415 to, the main shaft 415 drives the rotating cylinder 413 to synchronously rotate, the two cooling fins 413b synchronously rotate around the axial direction of the main shaft 415, air enters a cooling area from an air inlet and is discharged from a discharge port 417a, and the two cooling fins 413b exchange heat with the air to quickly dissipate heat on the two cooling fins 413b into the air;

s4: the low-temperature hot water discharged from the turbine heat dissipation mechanism 410 enters the heat exchange heat dissipation mechanism 420, the heat exchange heat dissipation mechanism 420 performs heat dissipation treatment on the low-temperature hot water and converts the low-temperature hot water into normal-temperature cold water, and finally, the normal-temperature cold water is discharged into the water tank 200 for recycling;

the water consumption in the factory is extremely high, therefore, the tap water in the tap water conveying pipeline will continuously flow, the second water pump 430 pumps the low-temperature hot water in the drainage cavity 415b into the low-temperature hot water pipeline 421 in the working process of the heat exchange heat dissipation mechanism 420, the low-temperature hot water flows upwards through the inner pipe 423a, in the process, the low-temperature hot water and the tap water in the outer pipe 423b complete heat exchange and are converted into normal-temperature cold water to enter the normal-temperature cold water pipeline 422, and then the normal-temperature cold water flows into the water tank 200 through the return pipe 424;

(III) granulating;

s5: the cooled hard plastic strips are discharged from an output port of the extrusion disc 120, and the hard plastic strips extruded by the dicing device 300 are diced.

A water circulation cooling system of a plastic granulator comprises a cooling device 100 connected with an extrusion end of the plastic granulator, a granulating device 300 connected with the extrusion end of the cooling device 100, and a water tank 200 used for circularly supplying normal-temperature cold water to the cooling device 100, wherein a normal-temperature cold water output end of the water tank 200 is directly connected and communicated with an input end of the cooling device 100, a heat dissipation device 400 indirectly connected and communicated is arranged between a normal-temperature cold water input end of the water tank 200 and an output end of the cooling device 100, the cooling device 100 is used for receiving molten strip-shaped plastic extruded by the plastic granulator and cooling the plastic, and the granulating device 300 is used for receiving strip-shaped hard plastic extruded by the cooling device 100 and granulating the hard plastic.

Specifically, the cooling device 100 includes a first vertical plate 101 and a second vertical plate 102 which are vertically and oppositely arranged, a connecting plate 103 fixedly connecting the first vertical plate 101 and the second vertical plate 102 is arranged between the first vertical plate 101 and the second vertical plate 102, the connecting plate 103 is arranged on the side of the first vertical plate 101 and the second vertical plate 102 and near the top of the first vertical plate, a middle vertical plate 104 arranged between the first vertical plate 101 and the second vertical plate 102 is fixedly arranged on the connecting plate 103, the middle vertical plate 104 is arranged near the second vertical plate 102, the cooling device 100 further includes two coaxially arranged docking discs 110, wherein one docking disc 110 is fixedly arranged on the middle vertical plate 104, the docking disc 110 is an output disc, the other docking disc 110 is connected with the extrusion end of the plastic granulator, the docking disc 110 is an input disc, the input disc is arranged on the outer circumferential surface of the docking disc 110, an external boss 111 is coaxially and fixedly connected with the extrusion end of the middle vertical plate 104/plastic granulator, one end face of the butt joint disc 110 close to each other is provided with a butt joint hole 112 arranged parallel to the axial direction of the butt joint disc, one end face of the butt joint disc opposite to each other is coaxially provided with a circular first mounting groove 113, a first butt joint 114 parallel to the axial direction of the first mounting groove is arranged in the first mounting groove 113, the first butt joint 114 is communicated with the butt joint hole 112, the butt joint hole 112 is provided with a plurality of water cooling pipes 115 which are aligned with extrusion holes of a plastic granulator one by one, the first butt joint 114 is arranged on the input disc and is aligned with the butt joint hole 112 one by one, the first butt joint 114 on the input disc is in sealed butt joint with the extrusion holes of the plastic granulator, the butt joint hole 112 on the input disc and the butt joint hole 112 on the extrusion disc are provided with water cooling pipes 115 for connecting and communicating the two, the water cooling pipes 115 movably penetrate through the first vertical plate 101, the diameter, in this process, the molten plastic strip and the cold water at normal temperature perform heat exchange in the water-cooling pipe 115, thereby cooling the molten plastic strip.

More specifically, in order to be able to inject cold water into the water cooling pipe 115 at normal temperature, an annular groove 116 is coaxially formed on the outer circumferential surface of the docking tray 110, a sealing ring 117 forming a sealing connection fit with the annular groove 116 is disposed at a notch of the annular groove 116, the annular groove 116 and the sealing ring 117 together form a water chamber, and a connection hole 118 radially disposed along the docking tray 110 and communicating the water chamber and the docking hole 112 is disposed between the water chamber and the docking hole 112.

More specifically, in order to prevent the cold water at normal temperature in the water cooling pipe 115 from overflowing from the first butt joint on the output tray, the cooling device 100 further includes an extrusion tray 120 fixedly installed on the second riser 102, an axial direction of the extrusion tray 120 is parallel to an axial direction of the butt joint tray 110, an axial line of the extrusion tray 120 is located right above an axial line of the butt joint tray 110, an external boss second 121 is coaxially and fixedly installed on an outer circumferential surface of the extrusion tray 120, the external boss second 121 is fixedly connected with the second riser 102, a circular mounting groove second 122 is coaxially installed on one end surface of the extrusion tray 120 close to the butt joint tray 110, a butt joint second 123 is arranged in the mounting groove second 122 and is parallel to the axial direction, the butt joint second 123 is provided with a plurality of butt joints first 114 which are matched with the output tray one by one, an axial line of the butt joint second 123 which is matched with each other is located right above the butt joint first 114, a bending pipe 125 for connecting and communicating the, the bent pipe 125 comprises a horizontal section two 125c coaxially communicated with the butt joint two 123, a horizontal section one 125b coaxially communicated with the butt joint one 114, and an inclined section 125a arranged between the horizontal section one 125b and the horizontal section two 125c and used for connecting and communicating the horizontal section one 125b and the horizontal section two 125c, wherein the inclined angle of the inclined section 125a of the bent pipe 125 is larger than 30 degrees and smaller than 45 degrees, the inclined section 125a is gradually upwards tilted from the horizontal section one 125b to the horizontal section two 125c, one end face, away from the butt joint disc 110, of the extrusion disc 120 is provided with a grain cutting end face 124, output holes communicated with the butt joint two 123 in a one-to-one correspondence mode are formed in the grain cutting end face 124, and through small-angle inclined arrangement of the bent pipe 125, on one hand, normal-temperature cold water is prevented from overflowing outwards from the butt joint one 114 on the output disc.

In the cooling process, the molten strip-shaped plastic is extruded from the extrusion hole of the plastic granulator and inserted into the water-cooled tube 115, the molten strip-shaped plastic gradually extends towards the bent tube 125 along the water-cooled tube 115, in the process, the water tank 200 supplies normal-temperature cold water to the water chamber on the input tray, the normal-temperature cold water enters the butt joint hole 112 from the connecting hole 118 and then enters the water-cooled tube 115 from the butt joint hole 112, the normal-temperature cold water flows towards the output tray from the input tray along the water-cooled tube 115, meanwhile, the normal-temperature cold water is fully contacted with the molten strip-shaped plastic, heat is introduced into the normal-temperature cold water by the molten strip-shaped plastic, the temperature of the normal-temperature cold water rises and is changed into high-temperature hot water, the high-temperature hot water enters the water chamber on the output tray from the connecting hole 118, then the high-temperature hot water flows into the heat sink 400, the heat sink 400 performs, the cooled hard plastic strips are discharged from an output port of the extrusion disc 120, and the hard plastic strips extruded by the dicing device 300 are diced.

As a more optimized scheme of the invention, in order to improve the cooling effect, the water-cooling pipe 115 comprises a first pipeline 115a which is coaxially communicated with the butt joint hole 112 on the output disc, a second pipeline 115b which is coaxially communicated with the butt joint hole 112 on the input disc, and a middle copper pipe 115c which is arranged between the first pipeline 115a and the second pipeline 115b and is used for connecting and communicating the first pipeline and the second pipeline, a rectangular heat dissipation channel 140 with openings at the upper end and the lower end is sleeved outside the middle copper pipe 115c, a plurality of heat dissipation fins 141 which are vertically arranged are arranged in the heat dissipation channel 140, the middle copper pipe 115c is vertical to the plane of the heat dissipation fins 141, the heat dissipation fins 141 are arranged at equal intervals, the heat dissipation fins 141 are in contact with the middle copper pipe 115c, the significance of the scheme is that normal temperature cold water exchanges heat with the molten strip-shaped plastic and is converted into high temperature hot, effectively reduced high temperature hot water's temperature, simultaneously, alleviateed heat abstractor 400 later stage to high temperature hot water radiating burden.

The water tank 200 is fixedly installed between the first vertical plate 101 and the second vertical plate 102, a water inlet pipe 201 which is vertically and downwardly arranged is connected to a water cavity on the input disc, a water drain pipe 202 which is vertically and downwardly arranged is connected to a water cavity on the output disc, the water tank 200 is arranged in a rectangular structure and is hermetically arranged, a first water pump 210 is fixedly installed on the upper end face of the water tank 200, the input end of the first water pump 210 is inserted into the water tank 200 and extends to the bottom of the first water pump, the output end of the first water pump 210 is connected and communicated with the water inlet pipe 201, the output end of the water drain pipe 202 is connected and communicated with the input end of the heat dissipation device 400, and the.

Specifically, normal atmospheric temperature cold water in the water tank 200 recycles the certain time, avoids the normal atmospheric temperature cold water in the water tank 200 to go bad and smelly, water tank 200 is provided with the valve 203 of being connected the switch-on rather than the bottom along its length direction's a terminal surface, but the open mode that the valve 203 set to mutual switch-over to and closed state and initial state be closed state, and the water injection hole 204 rather than inside switch-on is seted up to water tank 200 up end, outwards discharges the normal atmospheric temperature cold water in the water tank 200 through valve 203, injects normal atmospheric temperature cold water into in towards water tank 200 through water injection hole 204.

In the working process of the water tank 200, the first water pump 210 is started, the water pump 210 pumps normal-temperature cold water in the water tank 200 out, the normal-temperature cold water is conveyed into a water cavity on the input disc through the water inlet pipe 201, the normal-temperature cold water flows from the input disc to the output disc through the water cooling pipe 115 and enters the water cavity on the output disc, in the process, the normal-temperature cold water is converted into high-temperature hot water, the high-temperature hot water flows into the heat dissipation device 400 through the water discharge pipe 202, the heat dissipation device 400 dissipates heat of the high-temperature hot water and cools the high-temperature hot water, the high-temperature hot water is converted into normal-temperature cold water, the normal-temperature cold water is discharged into the water tank 200, when the normal-temperature cold water in the water tank 200 needs to be replaced, the valve 203 is switched from the closed state to the open state, the normal-temperature cold.

In order to carry out the cutting treatment on the strip-shaped hard plastic output by the extrusion disc 120 and cooled, one end face of the second vertical plate 102, which is far away from the first vertical plate 101, is fixedly provided with a first bulge 102a and a second bulge 102b, the first bulge 102a is positioned above the extrusion disc 120, the second bulge 102b is positioned below the extrusion disc 120, the second bulge 102b is provided with two bulges and is arranged in bilateral symmetry along the axial direction parallel to the extrusion disc 120, the cutting device 300 comprises guide rods 301 which are fixedly arranged between the first bulge 102a and the second bulge 102b and are arranged vertically in the axial direction, the guide rods 301 are provided with two and are in one-to-one correspondence with the first bulges 102a, lifting blocks 302 are movably sleeved on the guide rods 301, the lifting blocks 302 and the guide rods 301 form sliding guide fit along the vertical direction, a cutter 303 is fixedly arranged between the two lifting blocks 302, the upper side and the lower side of the cutter 303 are both, the cutting edge 303 is driven to move up and down in the vertical direction, so that the strip-shaped hard plastic output by the extrusion disc 120 is granulated.

Specifically, in order to drive the cutter 303 to move up and down, the dicing device 300 further includes a square frame 304 with an upward opening, the opening of the square frame 304 is fixedly connected with the outer side surface of the lifting block 302, the bottom of the square frame 304 is provided with a guide groove 305 which is perpendicular to the axial direction of the extrusion disc 120 and is horizontally arranged, the dicing device 300 further includes a turntable 306 which is rotatably arranged on one end surface of the second vertical plate 102 which is away from the first vertical plate 101, the axial direction of the turntable 306 is parallel to the axial direction of the extrusion disc 120 and the turntable 306 is positioned right below the extrusion disc 120, the edge of one end surface of the turntable 306 which is away from the second vertical plate 102 is fixedly provided with a raised head 307, the raised head 307 is inserted into the guide groove 305 and the raised head 307 can slide along the guide direction of the guide groove 305, in order to drive the turntable 306 to slide, the dicing device 300 further includes a dicing motor 308 which is fixedly, the axial direction of the output shaft of the pelletizing motor 308 is parallel to the axial direction of the turntable 306, a first belt transmission component 309 used for connecting the first belt transmission component and the second belt transmission component is arranged between the output shaft of the pelletizing motor 308 and the turntable 306, the first belt transmission component 309 comprises a first driving belt wheel which is coaxially and fixedly sleeved on the output shaft of the pelletizing motor 308, a first driven belt wheel which is coaxially and fixedly sleeved on the turntable 306 and a first belt which is arranged between the first driving belt wheel and the first driven belt wheel and used for connecting the first belt transmission component and the second belt transmission component, the turntable 306 is driven to rotate through the pelletizing motor 308, the raised head 307 drives the square frame 304 to move up and down, the square frame 304 drives the cutter 303 to move up and down.

More specifically, in order to guide and collect the plastic particles, the pelletizing device 300 further includes a guide hopper 310 fixedly mounted on the second vertical plate 102, the guide hopper 310 is located below the extrusion disc 120, and the guide hopper 310 is gradually arranged in a downward inclination manner along the direction of outputting the hard plastic strips from the extrusion disc 120, and the inclined end of the guide hopper is directed to the particle collecting box.

During the operation of the dicing device 300, the extrusion disc 120 gradually outputs the cooled hard plastic strip, during the process, the belt transmission assembly i 309 transmits the power of the dicing motor 308 to the turntable 306 and drives the turntable 306 to rotate, the turntable 306 drives the protruding head 307 to rotate around the axial direction of the turntable 306, the protruding head 307 rotates along the guide groove 305 and drives the square frame 304 to move up and down, the square frame 304 drives the lifting block 302 to move up and down along the guide rod 301, the lifting block 302 drives the cutter 303 to move up and down along the dicing end face 124, dicing the extruded hard plastic strip, and the plastic particles fall into the guide hopper 310 and slide into the collection box under the guide effect of the guide hopper 310. compared with the dicing-before-dicing and then cooling, the advantage of the present scheme is that the deformation of the plastic particles is effectively avoided, and the regularity of the plastic particles is ensured, while avoiding sticking of the molten plastic to the blade 303.

In order to be able to cool down the high-temperature hot water discharged from the drain pipe 202 and change it into normal-temperature cold water, the heat dissipation device 400 includes a turbine heat dissipation mechanism 410, a heat exchange heat dissipation mechanism 420 and a second water pump 430 arranged between the turbine heat dissipation mechanism 410 and the heat exchange heat dissipation mechanism 420, the input end of the turbine heat dissipation mechanism 410 is connected with the output end of the drain pipe 202, the output end of the heat exchange heat dissipation mechanism 420 is connected with the water tank 200, the second water pump 430 is used for connecting the output end of the turbine heat dissipation mechanism 410 with the input end of the heat exchange heat dissipation mechanism 420, the turbine heat dissipation mechanism 410 is used for dissipating heat of the high-temperature hot water and changing the high-temperature hot water into low-temperature hot water, and the heat exchange heat dissipation mechanism 420 is used for dissipating heat.

Specifically, the turbine heat dissipation mechanism 410 includes a fixing plate 411 fixedly connected to a side surface of the water tank 200, a fixing cylinder 412 with openings at upper and lower ends is fixedly installed on the fixing plate 411, the fixing cylinder 412 is located below the drain pipe 202 and coaxially arranged with the drain pipe 202, circular fixing frames 412a with circular and hollow-out arrangement are fixedly installed at upper and lower ends of the fixing cylinder 412, a rotating cylinder 413 is coaxially and rotatably installed in the fixing cylinder 412, circular end covers 414 forming sealing connection and matching with the openings at upper and lower ends are coaxially and fixedly installed at the openings at upper and lower ends of the rotating cylinder 413 by holding the rotating cylinder 413, the end covers 414 are rotatably connected and matched with the fixing frames 412a, rectangular heat dissipation fins 413a are fixedly installed on an inner circumferential surface of the rotating cylinder 413, a length direction of the heat dissipation fins 413a is parallel to an axial direction of the rotating cylinder 413, a width direction of the heat dissipation fins 413 deviates from a radial direction of the rotating cylinder, the first cooling fins 413a are arranged in a plurality of rows and arranged in an array along the circumferential direction of the rotating cylinder 413, the outer circular surface of the rotating cylinder 413 is fixedly provided with rectangular second cooling fins 413b, the length direction of the second cooling fins 413b is parallel to the axial direction of the rotating cylinder 413, the width direction of the second cooling fins 413b deviates from the radial direction of the rotating cylinder 413 by an angle larger than 20 degrees and smaller than 40 degrees, the second cooling fins 413b extend from the top to the bottom of the rotating cylinder 413, the second cooling fins 413b are arranged in a plurality of rows and arranged along the circumferential direction of the rotating cylinder 413, and the rotating cylinder 413, the first cooling fins 413a and the second cooling fins 413b are all made of copper materials, high-temperature hot water is sprayed onto the first cooling fins 413a from top to bottom, then the rotating cylinder 413 is driven to rotate, and heat.

Specifically, a main shaft 415 is coaxially arranged on the rotating cylinder 413, the upper end and the lower end of the main shaft 415 penetrate through the end cover 414 and the fixing frame 412a, the main shaft 415 is fixedly connected with the end cover 414 in a sealing manner, the main shaft 415 is rotatably connected and matched with the fixing frame 412a, a cylindrical water inlet cavity 415a is coaxially arranged at the top end of the main shaft 415 vertically downwards, the water inlet cavity 415a extends to the inside of the rotating cylinder 413, a conical disc 416a is coaxially and fixedly sleeved on the main shaft 415 and fixedly connected with the main shaft 415 into a whole, the distance between conical surfaces of the conical disc 416a is gradually increased along the vertical direction from top to bottom, the conical disc 416a is positioned above the two cooling fins 413b, an annular water tank 416b which is coaxially arranged with the main shaft 415 and has an upward opening is arranged at the middle position of the conical surface of the conical disc 416a along the inclination direction thereof, a communication hole 416c which is used for communicating the, the output end of the water discharge pipe 202 is coaxially sleeved at the top of the main shaft 415, the water discharge pipe 202 is rotatably connected, matched and hermetically communicated with the main shaft 415, in order to facilitate the exchange between air in a heat dissipation area between the rotating cylinder 413 and the fixed cylinder 412 and the outside air, an air outlet 417a which is connected and communicated with the inside of the fixed cylinder 412 is arranged on the outer circular surface of the fixed cylinder 412, openings formed at the upper end and the lower end of the fixed cylinder 412 and the rotating cylinder 413 are air inlets, high-temperature hot water uniformly overflows from the conical surface of the conical disk 416a and is sprinkled onto the first cooling fins 413a, the high-temperature hot water completes heat exchange with the first cooling fins 413a, the first cooling fins 413a transmit heat to the second cooling fins 413b, the heat on the second cooling fins 413b is dissipated to the air by driving the rotating cylinder 413 to rotate, and the high-temperature.

More specifically, in order to drive the rotating cylinder 413 to rotate, the turbine heat dissipation mechanism 410 further includes a driving component for driving the main shaft 415 to rotate, the driving component includes a heat dissipation motor 418 fixedly connected to the fixing plate 411 and disposed vertically and downwardly along the axial direction of the output shaft, a second belt transmission assembly is disposed between the output end of the heat dissipation motor 418 and the bottom end of the main shaft 415, the second belt transmission assembly includes a second driving pulley coaxially fixedly sleeved on the output shaft of the heat dissipation motor 418, a second driven pulley coaxially fixedly sleeved on the bottom end of the main shaft 415, and a second belt disposed between the second driving pulley and the second driven pulley and used for connecting the two, and the rotating cylinder 413 is driven to rotate around the axial direction of the rotating cylinder 413 through the rotation of the heat dissipation motor.

The top of the high-temperature hot water cooling fin 413a flows downwards to the bottom of the high-temperature hot water cooling fin 413a and falls into the bottom of the rotating cylinder 413, at the moment, the high-temperature hot water is converted into low-temperature hot water, in order to facilitate the bottom of the low-temperature hot water rotating cylinder 413 to be discharged outwards, a cylindrical drainage water cavity 415b is coaxially formed in the vertical upward direction at the bottom end of the main shaft 415, the drainage water cavity 415b extends into the rotating cylinder 413, a communication groove 415c for connecting and communicating the drainage water cavity 415b and the rotating cylinder 413 is arranged between the drainage water cavity 415b and the bottom of the rotating cylinder 413, and in order to improve the efficiency of low-temperature hot water discharging outwards, the communication.

During the operation of the turbine heat dissipation mechanism 410, the high temperature hot water discharged from the water discharge pipe 202 flows into the water inlet cavity 415a, then the high temperature hot water flows into the water tank 416b through the communication hole 416c, the high temperature hot water overflows from the notch of the water tank 416b and slides uniformly around along the tapered surface of the tapered disk 416a, the high temperature hot water sprinkles uniformly on the first heat dissipation fins 413a and slides from the top of the first heat dissipation fins 413a to the bottom thereof, the high temperature hot water exchanges heat with the first heat dissipation fins 413a and transfers the heat to the first heat dissipation fins 413a, the first heat dissipation fins 413a transfer the heat to the second heat dissipation fins 413b, the high temperature hot water is converted into low temperature hot water and gathers at the bottom of the rotary cylinder 413, and flows into the water discharge cavity 415b through the communication groove 415c, and at the same time, the second belt transmission assembly 419 transfers the power on the output shaft of the heat dissipation motor 418 to the main shaft 415 and drives the main shaft 415 to, the main shaft 415 will drive the rotating cylinder 413 to rotate synchronously, the two cooling fins 413b will rotate synchronously around the axial direction of the main shaft 415, air enters the cooling area from the air inlet and is discharged from the discharge port 417a, and the two cooling fins 413b exchange heat with the air to quickly dissipate heat on the two cooling fins 413b to the air.

As a more optimized scheme of the present invention, in order to utilize the high-speed airflow discharged from the air outlet 417a, a draft hood 417b for connecting and communicating the air outlet 417a and the bottom of the heat dissipation channel 140 is disposed between the air outlet 417a and the bottom of the heat dissipation channel 140.

In order to further dissipate the heat of the low-temperature hot water discharged from the drainage cavity 415b to convert the low-temperature hot water into normal-temperature cold water and discharge the cold water into the water tank 200, the heat exchange heat dissipation mechanism 420 includes a low-temperature hot water pipe 421 and a normal-temperature cold water pipe 422 which are arranged in an up-down symmetrical manner and are transversely arranged, the low-temperature hot water pipe 421 is located right below the normal-temperature cold water pipe 422 and both of which are square pipes, the low-temperature hot water pipe 420 is fixedly installed on the upper end surface of the water tank 200, the low-temperature hot water pipe 421 and the normal-temperature cold water pipe 422 are both hard pipes, a copper heat dissipation pipe 423 is vertically arranged between the low-temperature hot water pipe 421 and the normal-temperature cold water pipe 422, the heat dissipation pipes 423 are provided with a plurality of heat dissipation pipes and are arranged in an array along the length direction of the low-, in order to discharge the low-temperature hot water in the drainage water cavity 415b into the low-temperature hot water pipeline 421, the input end of the second water pump 430 is coaxially sleeved on the bottom end of the main shaft 415 and is in rotating sealing connection and matching with the main shaft 415, the output end of the second water pump 430 is connected with one end of the low-temperature hot water pipeline 421, the other end of the low-temperature hot water pipeline 421 is arranged in a sealing manner, in order to discharge the normal-temperature cold water in the normal-temperature cold water pipeline 422 into the water tank 200, one end of the normal-temperature cold water pipeline 422 is communicated with a return pipe 424, the output end of the return pipe 424 is inserted into the water tank 200, and the.

Specifically, in order to enable the low-temperature hot water to be converted into the normal-temperature cold water through heat dissipation in the heat dissipation pipe 423 and enter the normal-temperature cold water pipeline 422, the heat exchange heat dissipation mechanism 420 further comprises a first external connection pipe 425, a second external connection pipe 426, a first tap water pipe 427 and a second tap water pipe 428, wherein the first external connection pipe 425 is located right below the second external connection pipe 426, the length direction of the first external connection pipe 425 is parallel to the length direction of the low-temperature hot water pipeline 421 and the two external connection pipes are arranged close to each other, the outer circular surface of the first external connection pipe 425 is connected and communicated with the bottom of the outer pipe 423b, one end of the first external connection pipe 425 is connected and communicated with the output end of the first tap water pipe 427, the other end of the first external connection pipe 425 is arranged closed, the length direction of the second external connection pipe 426 is parallel to the length direction of the low-temperature hot water pipeline 422 and the two external, the input end of the first tap water pipe 427 and the output end of the second tap water pipe 428 are connected in series with a tap water conveying pipeline of the factory.

The water demand in the factory is very large, therefore, the running water in the running water conveying pipeline will flow continuously, the heat exchange heat dissipation mechanism 420 is in the working process, the second water pump 430 pumps the low-temperature hot water in the drainage water cavity 415b into the low-temperature hot water pipeline 421, the low-temperature hot water flows upwards through the inner pipe 423a, in the process, the low-temperature hot water and the running water in the outer pipe 423b complete heat exchange and are converted into normal-temperature cold water to enter the normal-temperature cold water pipeline 422, then the normal-temperature cold water flows into the water tank 200 through the return pipe 424, the significance of the scheme is achieved, the running water is used for cooling the low-temperature hot water discharged by the turbine heat dissipation mechanism 410, and the energy conservation and environmental protection are achieved.

Claims

1. The water-saving cooling method for recovering and granulating the waste plastic foam comprises the following steps:

(I) an extrusion stage;

(II) a cooling circulation stage;

(III) granulating;

2. The water-saving cooling method for recycling and granulating waste plastic foam as claimed in claim 1, wherein an annular groove is coaxially formed on the outer circumferential surface of the butt joint disc, a sealing ring which is in sealing connection and matching with the groove opening of the annular groove is arranged at the groove opening of the annular groove, the annular groove and the sealing ring jointly form a water chamber, and a connecting hole which is radially arranged along the butt joint disc and is communicated with the water chamber and the butt joint hole is arranged between the water chamber and the butt joint hole;

the cooling device also comprises an extrusion disc fixedly arranged on the second vertical plate, the axial direction of the extrusion disc is parallel to the axial direction of the butt joint disc, the axial line of the extrusion disc is positioned right above the axial line of the butt joint disc, the outer circular surface of the extrusion disc is coaxially and fixedly provided with an external boss two, the external boss two is fixedly connected with the second vertical plate, one end surface of the extrusion disc, which is close to the butt joint disc, is coaxially provided with a circular mounting groove two, the mounting groove two is internally provided with a plurality of butt joints two which are arranged in parallel to the axial direction of the extrusion disc, the butt joints two are provided with a plurality of butt joints one by one and matched with the butt joint one on the output disc, the axial lines of the butt joints two which are mutually matched are positioned right above the butt joint one, a bent pipe for connecting and communicating the two is arranged between the butt joint two and the butt joint one, the bent pipe comprises a horizontal section two which is coaxially communicated with the butt joint two, a horizontal, the inclination angle of the inclined section of the bent pipe is more than 30 degrees and less than 45 degrees, the inclined section is gradually upwards tilted and arranged from the horizontal section I to the horizontal section II, the extrusion disc deviates from the end face of the butt joint disc and is set into a grain cutting end face, and an output hole which is communicated with the butt joint heads in a one-to-one correspondence mode is formed in the grain cutting end face.

3. The water-saving cooling method for recycling and granulating waste plastic foam as claimed in claim 1, wherein a main shaft is coaxially arranged on the rotary cylinder, the upper end and the lower end of the main shaft penetrate through the end cover and the fixed frame, the main shaft is fixedly connected with the end cover in a sealing manner, the main shaft is rotatably connected and matched with the fixed frame, a cylindrical water inlet cavity is coaxially arranged at the top end of the main shaft in a vertical downward direction, the water inlet cavity extends to the inside of the rotary cylinder, a conical disc is coaxially and fixedly sleeved on the main shaft and fixedly connected with the conical disc, the distance between conical surfaces of the conical disc is gradually increased from top to bottom along the vertical direction, the conical disc is positioned above the second radiating fin, an annular water tank which is coaxially arranged with the main shaft and has an upward opening is arranged at the middle position of the conical surface of the conical disc along the inclination direction, communication holes which are used for communicating the conical surface with the, the water discharge pipe is in rotating connection and matching with the main shaft and is in sealed communication, an air outlet which is in communication connection with the inside of the fixed cylinder is arranged on the outer circular surface of the fixed cylinder, openings formed at the upper end and the lower end of the fixed cylinder and the rotating cylinder are air inlets, high-temperature hot water uniformly overflows from the conical surface of the conical disk and is sprinkled onto the first cooling fin, the high-temperature hot water and the first cooling fin finish heat exchange, the first cooling fin transfers heat to the second cooling fin, the heat on the second cooling fin is dissipated to the air by driving the rotating cylinder to rotate, and the high-temperature hot water is converted into low-temperature hot water and flows into the bottom of;

the spindle bottom is vertically upwards coaxially provided with a cylindrical drainage water cavity, the drainage water cavity extends to the inside of the rotating cylinder, a communicating groove used for connecting and connecting the drainage water cavity and the rotating cylinder is arranged between the drainage water cavity and the bottom of the rotating cylinder, and the communicating groove is provided with a plurality of communicating grooves and is arranged in an array mode along the circumferential direction of the spindle.

4. The water-saving cooling method for recycling and granulating waste plastic foam as claimed in claim 1, wherein the water-cooling pipe comprises a first pipeline coaxially communicated with the butt-joint hole on the output disc, a second pipeline coaxially communicated with the butt-joint hole on the input disc, and a middle copper pipe arranged between the first pipeline and the second pipeline and used for connecting and communicating the first pipeline and the second pipeline, a rectangular heat dissipation channel with openings at the upper end and the lower end is sleeved outside the middle copper pipe, heat dissipation fins vertically arranged are arranged in the heat dissipation channel, the middle copper pipe is perpendicular to the plane of the heat dissipation fins, the heat dissipation fins are arranged at equal intervals, and the heat dissipation fins are in contact with the middle.

5. The water-saving cooling method for recycling and granulating waste plastic foam as claimed in claim 1, wherein a valve communicated with the bottom of the water tank is arranged on one end surface of the water tank along the length direction of the water tank, the valve is set to be in an open state and a closed state which can be switched to each other, the valve is in the closed state in an initial state, and a water injection hole communicated with the interior of the water tank is formed in the upper end surface of the water tank.

6. The water-saving cooling method for recycling and granulating waste plastic foam as claimed in claim 1, wherein the heat dissipating device comprises a turbine heat dissipating mechanism, a heat exchange heat dissipating mechanism and a second water pump arranged between the turbine heat dissipating mechanism and the heat exchange heat dissipating mechanism, an input end of the turbine heat dissipating mechanism is connected and communicated with an output end of the water discharging pipe, an output end of the heat exchange heat dissipating mechanism is connected and communicated with the water tank, the second water pump is used for connecting and communicating an output end of the turbine heat dissipating mechanism with an input end of the heat exchange heat dissipating mechanism, the turbine heat dissipating mechanism is used for dissipating heat of high-temperature hot water and converting the high-temperature hot water into low-temperature hot water, and the heat exchange heat dissipating mechanism is used for dissipating heat of the.

7. The water-saving cooling method for recycling and granulating waste plastic foam as claimed in claim 6, wherein the turbine heat dissipation mechanism further comprises a driving member for driving the main shaft to rotate, the driving member comprises a heat dissipation motor which is fixedly connected with the fixed plate and the output shaft of which is arranged vertically and downwards along the axial direction, a second belt transmission assembly is arranged between the output end of the heat dissipation motor and the bottom end of the main shaft, and the second belt transmission assembly comprises a second driving pulley which is coaxially and fixedly sleeved on the output shaft of the heat dissipation motor, a second driven pulley which is coaxially and fixedly sleeved on the bottom end of the main shaft, and a second belt which is arranged between the second driving pulley and the second driven pulley and.

8. The water-saving cooling method for recycling and granulating waste plastic foam as claimed in claim 2, wherein a diversion cover is arranged between the air outlet and the bottom of the heat dissipation channel for connecting the air outlet and the heat dissipation channel.

9. The water-saving cooling method for recycling and granulating waste plastic foam as claimed in claim 1, wherein a first bulge and a second bulge are fixedly arranged on one end surface of the second vertical plate, which is far away from the vertical plate, the first bulge is positioned above the extrusion disc, the second bulge is positioned below the extrusion disc, the two bulges are arranged and are symmetrically arranged along the axial direction parallel to the extrusion disc, the granulating device comprises two guide rods which are fixedly arranged between the first bulge and the second bulge and are vertically arranged along the axial direction, the two guide rods are in one-to-one correspondence with the first bulge, lifting blocks are movably sleeved on the guide rods, the lifting blocks and the guide rods form sliding guide fit along the vertical direction, a cutter is fixedly arranged between the two lifting blocks, the upper side and the lower side of the cutter are both provided with a cutting edge, and the;

the granulating device also comprises a square frame with an upward opening, the opening of the square frame is fixedly connected with the outer side surface of the lifting block, a guide groove which is perpendicular to the axial direction of the extrusion disc and is horizontally arranged is formed in the bottom of the square frame, the granulating device also comprises a turntable which is rotatably arranged on one end surface of the vertical plate and is deviated from the vertical plate, the axial direction of the turntable is parallel to the axial direction of the extrusion disc, the turntable is positioned under the extrusion disc, a raised head is fixedly arranged at the edge of the turntable deviated from the two end surfaces of the vertical plate, the raised head is inserted in the guide groove and can slide along the guide direction of the guide groove, the granulating device also comprises a granulating motor fixedly arranged on the upper end surface of the water tank, the axial direction of an output shaft of the granulating motor is parallel to the axial direction of the turntable, a first belt transmission assembly for connecting the first belt transmission assembly and the second belt transmission assembly comprises a first driving belt pulley which is coaxially, The first driven belt wheel is coaxially and fixedly sleeved on the turntable, and the first belt is arranged between the first driving belt wheel and the first driven belt wheel and used for connecting the first driving belt wheel and the first driven belt wheel.

10. The water-saving cooling method for recycling and granulating waste plastic foams as claimed in claim 9, wherein the granulating device further comprises a guide hopper fixedly arranged on the second vertical plate, the guide hopper is positioned below the extrusion disc, the guide hopper is gradually and obliquely arranged downwards along the direction of outputting the strip-shaped hard plastics by the extrusion disc, and the oblique end of the guide hopper points to the particle collecting box.