Low temperature granulator

Abstract

The low-temperature granulator of the present invention comprises a feeding part, a feeding part provided with a screw, an extrusion granulation part, a power part including a main shaft connected by a motor drive, and a collection part, wherein the main shaft drives the screw, characterized in that the outer surface of the screw is provided with an integrally formed thread arranged around the shaft, the screw comprises a first screw and a second screw, the first screw has a first end, the second screw has a second end, and the first screw is coaxially movably connected with the second end of the second screw through the first end. The present invention scheme uses a screw arranged in sections so that the outer part of the screw has a relatively complete integrity, which can effectively avoid the formation of material residues during the extrusion granulation process.

Description

[0001] Prior application: An energy-saving and environmentally friendly low-temperature modified granulator and production process

[0002] CN201910521156.7 Technical Field

[0003] The invention relates to an extrusion granulation device, in particular to a low-temperature granulator. Background Art

[0004] Existing granulators are generally twin-screw type. When granulating, the general steps are: first mixing and heating, then mixing, melting, extruding, and finally water cooling, drawing and pelletizing; a large amount of waste gas will be generated in the heating process, and a large amount of waste water will be generated in the water cooling process. The direct discharge of the generated waste gas and waste water will cause environmental pollution, which is not conducive to environmental protection. If special processing equipment is purchased, it will undoubtedly increase the burden on the enterprise; at the same time, when granulating modified materials, heating, water cooling, etc. all require a lot of energy consumption, resulting in an increase in production costs; at the same time, when heating the material, it will destroy some of the internal atomic and molecular structures of the material, resulting in poor material performance and affecting the service life of the material. Summary of the invention

[0005] The low-temperature granulator disclosed in the present invention can realize continuous mixing, accelerate the feeding speed, increase the pressure when the material is extruded, and heat and fuse the material through pressure and friction to realize low-temperature granulation. The whole process does not require heating or water cooling, does not generate waste gas or waste water, and is beneficial to energy saving and environmental protection.

[0006] The low-temperature granulator of the present invention comprises a feeding part, a feeding part provided with a screw, an extrusion granulation part, a power part including a main shaft connected by a motor drive, and a collecting part, the main shaft drives the screw, the outer surface of the screw is provided with an integrally formed thread arranged around the shaft, the screw comprises a first screw and a second screw, the first screw has a first end, the second screw has a second end, and the first screw is coaxially connected to the second end of the second screw through the first end. The integrally formed thread can be formed on the surface of the screw by turning and other technical means, rather than by secondary welding as in the prior art, to improve the connection strength.

[0007] An improvement of the low-temperature granulator of the present invention is that the cross-sectional diameter of the screw perpendicular to the axis decreases from the first screw to the second screw.

[0008] An improvement of the low-temperature granulator of the present invention is that the screw is also provided with a second connecting piece, and the first screw and the second screw are respectively provided with a third connecting hole and a fourth connecting hole which are through holes, and the third connecting hole and the fourth connecting hole are connected by the second connecting piece.

[0009] An improvement of the low-temperature granulator of the present invention is that the first screw and the second screw of the screw rod are respectively provided with a first axial hole and a second axial hole at their respective central axis positions, and the first axial hole and the second axial hole are both matched and sleeved to be connected to the main shaft.

[0010] An improvement of the low-temperature granulator of the present invention, the first shaft hole and the second shaft hole are formed with a first clamping groove and a second clamping groove on their respective sides, and the first clamping groove and the second clamping groove are both recessed from the main shaft toward the screw;

[0011] A latching protrusion is formed on the main shaft, which protrudes from the main shaft toward the screw rod, and the latching protrusion is matched and engaged in the corresponding latching groove (especially including the first latching groove and the second latching groove).

[0012] An improvement of the low-temperature granulator of the present invention, the other end of the second screw rod opposite to the second end rod is a third end rod, and the third end rod is also connected to a bull horn turntable. Preferably, the bull horn turntable is provided with a third axial hole at the central axis position, and is connected to the main shaft through the third circumference for driving. The third axial hole is formed with a third clamping groove on its side, and the third clamping groove is recessed from the main shaft toward the screw rod, and is engaged with a clamping protrusion on the main shaft.

[0013] An improvement of the low-temperature granulator of the present invention, the second screw has a first connecting hole which penetrates through the second screw body from the second end and is connected to the third end;

[0014] The portion of the horn turntable adjacent to the third end has a second connection hole arranged corresponding to the second screw connection hole, and the second connection hole is a countersunk hole, that is, the second connection hole does not pass through the horn turntable;

[0015] The second screw rod further includes a first connecting member, which passes through the first connecting hole from the second end of the second screw rod and is connected to the second connecting hole.

[0016] An improvement of the low-temperature granulator of the present invention is that a disc-shaped discharge plate is further arranged at the lower part of the ox-horn turntable, and a discharge hole is formed on the discharge plate.

[0017] An improvement of the low-temperature granulator of the present invention is that the discharge holes are elongated holes and are arranged in a radial form.

[0018] An improvement of the low-temperature granulator of the present invention, the power part also includes a reducer, the power output end of the reducer is driven to connect the main shaft, and the motor is driven to connect to the power input end of the reducer. The reducer here can be a conventional commercial product that meets the requirements of flow through and deceleration.

[0019] Specifically:

[0020] Here is a vertical energy-saving and environmentally friendly low-temperature modified granulator, including a base, a control box, a discharging cyclone device, a silo, a cavity and a conical screw. The control box is installed at the upper end of the base. A reducer is provided inside the base. The control box controls the operation of the reducer. A main shaft is installed on the reducer. A main bearing seat is provided at the upper end of the base. The main shaft is fixed to the base through the main bearing seat. A bearing is provided at the connection between the main bearing seat and the main shaft. The conical screw is fixed to the upper end of the main shaft. A sleeve is provided on the outside of the conical screw. The sleeve is fixed on the cavity. The main shaft drives the conical screw to rotate inside the sleeve. The conical screw is provided Spiral oblique ribs (i.e., threads or structures with equivalent functions), a bull horn turntable is provided at the lower end of the conical screw, a particle discharging net is provided on the outer side of the bull horn turntable, a particle discharging base is provided at the lower end of the particle discharging net, the upper end of the particle discharging base is connected to the cavity, a cutter seat is provided on the outer side of the particle discharging net, a cutter is installed on the cutter seat, a cutting disc is provided at the lower end of the cutter seat, the cutting disc is fixed on the main shaft, and the main shaft drives the cutting disc to rotate, a discharge hole is provided on the rear side of the cavity, the discharge hole is connected to the silo, a fan is installed on the silo, the fan is connected to the discharge cyclone device through a pipeline, and the obtained granular material is sucked into the discharge cyclone device for separation.

[0021] The conical screw has a conical structure with a larger upper end and a smaller lower end, and the inner side of the sleeve adopts a conical structure with the same appearance as the conical screw.

[0022] The bottom of the ox horn turntable is ladder-like.

[0023] A cavity is formed between the particle discharging base, the particle discharging net, and the ox-horn turntable / discharging plate.

[0024] The horn turntable and the conical screw are independent structures, and the horn turntable is fixed at the lower end of the conical screw.

[0025] A feed port is provided at the upper end of the sleeve, and a dust recovery cyclone device is provided at the upper end of the feed port. The dust recovery cyclone device is connected to the exhaust pipe of the discharge cyclone device through a pipeline, and is used to recover dust in the dust recovery cyclone device. Independent cyclone separators are provided inside the dust recovery cyclone device and the discharge cyclone device.

[0026] The present invention realizes continuous mixing by adopting the structure, accelerates the feeding speed, increases the pressure during material extrusion, and simultaneously heats and fuses the material through pressure and friction, thereby realizing low-temperature granulation, so that the entire production process does not require heating of the material, does not require water cooling, and does not generate waste gas and waste water during the elongation process, thereby realizing energy conservation and environmental protection. Meanwhile, low-temperature granulation will not destroy the molecular and atomic structures of the material, so that the modified material after granulation has better performance and is practical and widely used.

[0027] As a preferred technical solution, the conical screw is a conical structure with a larger upper end and a smaller lower end, and the inner side of the sleeve adopts a conical structure with the same appearance as the conical screw.

[0028] This setting realizes the control on the feeding pressure, ensures the uniformity of the feeding, and enables automatic feeding.

[0029] As a preferred technical solution, the bottom of the ox horn turntable has a ladder-like structure.

[0030] This setting increases the friction between the bull horn turntable and the material, increases the temperature through friction, makes it easier for the mixed materials to blend, and helps to improve the granulation efficiency.

[0031] As a preferred technical solution, a cavity is formed between the particle discharging base, the particle discharging net, and the lower part of the ox-horn turntable / discharging plate (which can be referred to as the discharging plate).

[0032] This arrangement facilitates the centralized kneading of the mixed materials and simultaneously forms a pressure chamber so that the fused materials can be extruded in time.

[0033] As a preferred technical solution, the horn turntable and the conical screw are independent structures, and the horn turntable is fixed to the lower end of the conical screw.

[0034] This arrangement is conducive to the installation, disassembly and maintenance of the horn turntable and the conical screw, and is also convenient for their processing and manufacturing, thereby increasing their convenience.

[0035] As a preferred technical solution, a feed port is provided at the upper end of the sleeve, a dust recovery cyclone device is provided at the upper end of the feed port, and an air inlet pipe of the dust recovery cyclone device is connected to an exhaust pipe of the discharge cyclone device by a pipeline. A cyclone separator is independently provided inside the dust recovery cyclone device and the discharge cyclone device.

[0036] This arrangement is conducive to the centralized recovery of dust and finished modified materials, and prevents dust pollution.

[0037] A production process of an energy-saving and environmentally friendly low-temperature modified granulator, the steps of which are as follows:

[0038] 1) Start the reducer, and the reducer drives the main shaft to rotate;

[0039] 2) Add various mixed materials through the feed port;

[0040] 3) The conical screw is driven to rotate by the main shaft, so that the material is automatically unloaded along the inclined ribs;

[0041] 4) The material moves into the cavity, and the friction caused by the rotation of the horn turntable and the pressure caused by the continuous feeding of the conical screw cause the temperature of the material in the cavity to rise and fuse with each other;

[0042] 5) When the material in the cavity reaches a certain degree of saturation (meaning that it is sufficiently squeezed, fused or even changes phase, and the pressure flow capacity is enhanced at this time), the smelted material is squeezed out from the mesh of the particle outlet net under the action of pressure;

[0043] 6) At the same time, the main shaft drives the cutter seat to rotate, and the cutter on the cutter seat cuts the strip-shaped modified material extruded from the particle net into particles, and the particle-shaped modified material falls into the cavity;

[0044] 7) The granular modified material falling into the cavity enters the silo from the discharge hole through the suction of the fan, and is then transported to the discharge cyclone device through the action of the fan, and the modified material is collected centrally through the discharge cyclone device.

[0045] The beneficial effects of the present invention are as follows: continuous mixing can be achieved, the feeding speed can be accelerated, the pressure during material extrusion can be increased, the material is heated and fused by pressure and friction, and low-temperature granulation is achieved; the entire process does not require heating or water cooling, and does not generate waste gas or waste water, which is beneficial to energy conservation and environmental protection, and has practicality and wide application; the produced particles can be directly used for subsequent production, packaging, etc., and do not need to be dried after water cooling like in the prior art, and the production efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 is a schematic diagram of an embodiment of the screw portion of the low-temperature granulator of the present invention;

[0048] Figure 2 yes Figure 1 A schematic diagram of the first screw of the embodiment;

[0049] Figure 3 is a schematic structural diagram of the second screw of the present invention;

[0050] Figure 4 It is a structural schematic diagram of the ox horn turntable of the present invention;

[0051] Figure 5 It is a structural schematic diagram of a discharge plate of the present invention. DETAILED DESCRIPTION

[0052] The present invention will be described in detail below in conjunction with the various embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0053] like Figure 1-5 As shown, the embodiments of the low-temperature granulator of the present invention include but are not limited to the technical solutions stated below: the granulator includes a feeding part, a feeding part provided with a screw 001, an extrusion granulation part, a power part including a main shaft driven by a motor, and a collecting part. The main shaft drives the screw 001, and the outer surface of the screw 001 is provided with an integrally formed thread arranged around the axis (including a first thread 102 on the outer side of the first screw and a second thread 202 on the outer side of the second screw) to obtain a higher thread connection strength and meet the requirements for the connection strength between the thread and the main structure of the screw 001 under high extrusion pressure. More importantly, the screw 001 here is divided into at least two sections, namely, including Figure 1 The first screw 100 and the second screw 200 are connected front and back, the main body 101 of the first screw 100 has a first end 106, and the main body 201 of the second screw 200 has a second end 207. The first screw 100 is coaxially movably connected with the second end 207 of the second screw 200 through the first end 106. That is, when this solution adopts the solution in the figure, the first screw 100 and the second screw 200 adopt Figure 1 The first screw 100 and the second screw 200 of the screw 001 are sequentially sleeved and connected to the main shaft in the order in the figure. That is, in the following situation, the first screw 100 and the second screw 200 of the screw 001 are respectively provided with the first axial hole 103 and the second axial hole 203 at their respective central axis positions, and the first axial hole 103 and the second axial hole 203 are both matched and sleeved and connected to the main shaft. The one-piece thread can be formed on the surface of the screw 001 by turning or other technical means, rather than by secondary welding as in the prior art, to improve the connection strength. The cross-sectional diameter of the screw 001 perpendicular to the axis decreases from the first screw 100 to the second screw 200. When the cross-sectional diameter continuously decreases, the main body of the screw 001 becomes a conical structure, that is, Figure 1 The situation where the middle and upper parts are thick and the lower part is thin.

[0054] The screw rod 001 is also provided with a second connecting member, and the first screw rod 100 and the second screw rod 200 are respectively provided with a third connecting hole 105 and a fourth connecting hole 205, both of which are through holes, and the third connecting hole 105 and the fourth connecting hole 205 are connected through the second connecting member. That is, through the connection between the third connecting hole 105 and the fourth connecting hole 205, the first screw rod 100 and the second screw rod 200 have a stable overall shape after being fixedly connected to the main shaft, thereby ensuring the structural stability.

[0055] Additionally, in order to obtain a better connection and fixation between the main shaft and the screw 001, so as to confine the two parts of the screw 001 to the main shaft and avoid small shaking, etc., the first shaft hole 103 and the second shaft hole 203 are formed with a first card slot 104 and a second card slot 204 on their respective sides, and the first card slot 104 and the second card slot 204 are both recessed from the main shaft toward the direction of the screw 001; correspondingly, a latching protrusion is formed on the main shaft, which protrudes from the main shaft toward the direction of the screw 001, and the latching protrusion is matched to be engaged with the corresponding card slot (especially including the first card slot 104 and the second card slot 204) to form a form similar to a mechanical lock, which is also more convenient for the main shaft to drive the screw 001.

[0056] In the above scheme, the other end of the second screw 200 opposite to the second end 207 is the third end, and the third end is also connected to the ox-horn turntable 300. Preferably, the main body 301 of the ox-horn turntable 300 is provided with a third axial hole 303 at the position of the central axis (also the rotating shaft driven by the main shaft), and is connected and driven with the main shaft through the third circumference. An extension 302 extending outward is also formed on the edge of the main body of the ox-horn turntable to achieve stirring and extrusion. Furthermore, the third axial hole 303 is formed with a third groove 304 on its side, and the third groove 304 is recessed from the main shaft toward the direction of the screw 001, and is engaged with the protrusion on the main shaft. Similarly, this result not only plays a locking role, but also facilitates the driving of the main shaft.

[0057] In the above scheme, the second screw 200 has a first connection hole 206 that passes through the second screw 200 body and is connected to the third end; the portion of the horn turntable 300 adjacent to the third end has a second connection hole 306 corresponding to the connection hole of the second screw 200, and the second connection hole 306 is a countersunk hole; the second screw 200 also includes a first connecting member, which passes through the first connection hole 206 and is connected to the second connection hole 306 by the second end 207 of the second screw 200, that is, through the second connection hole 306 that does not pass through the horn turntable 300, the end of the first connecting member connected to the horn turntable 300 is limited in the horn turntable 300, so that there is no obvious pore on the end face of the horn turntable 300 after assembly, and no material is left therein, thereby obtaining good practicality and low maintenance. This splicing feature of the first screw 100, the second screw 200 and the horn turntable 300 is an important innovation of the scheme of the present invention.

[0058] In the above scheme, a disc-shaped discharge plate 400 is also provided at the lower part of the horn turntable 300, and a discharge hole 403 is formed on the main body 401 of the discharge plate 400. Further, the discharge hole 403 is an elongated hole and is radially arranged, such as Figure 5The discharge plate 400 can also be connected to the main shaft through the discharge plate center hole 402 at its center.

[0059] In the above scheme, the power part also includes a reducer, the power output end of the reducer is connected to the main shaft, and the motor is connected to the power input end of the reducer. The reducer here can be a conventional commercially available product that meets the requirements of flow and deceleration, so as to obtain a higher torque output and meet the requirements of low-temperature extrusion melting in this scheme. If the reducer is not used, the high speed output caused by the direct output of the motor may cause jamming due to too low torque.

[0060] Further, in the above scheme, the low-temperature granulator includes a feeding part, a feeding part including a sleeve and a screw 001, an extrusion granulation part, a power part driving a main shaft and a collecting part. The combined screw 001 is cooperatively sleeved in the sleeve to form a feeding space between the two. The screw 001 has a threaded structure, and the threads are all turned. The main shaft drives the screw 001 so that the sleeve is hollow and has a feeding side and a discharging side. The power part can be a motor that drives the main shaft after the gearbox is changed. The feeding part adds raw materials from the feeding side to the feeding space in the sleeve. The screw 001 is driven by the main shaft. The screw 001 rotates in the sleeve under the action of the thread structure on the screw 001, so as to realize the conveying of the material from the feeding side to the discharging side, and then the material enters the extrusion granulation part. In this process, the raw materials can be mixed or crushed under the joint action of the thread structure on the screw 001 and the inner wall of the sleeve; the thread structure on the screw 001 includes an external thread protruding from the surface of the main body of the screw 001 and a screw groove formed between the external threads; of course, the main body of the screw 001 here can be conical, and the cross-sectional diameter of the main body gradually decreases from the feeding side of the sleeve to the discharging side, and the inner wall structure of the sleeve will also cooperate with it. In addition, the screw groove volume of the thread structure on the outside of the main body of the screw 001 can gradually decrease from the feeding side of the sleeve to the discharging side, so as to gradually increase the pressure on the material therebetween, and obtain sufficient pressure on the discharging side and maintain it, so as to facilitate the continuous pressurization of the material in the extrusion granulation part and ensure continuous production.

[0061] The extrusion granulation part here includes a bull horn turntable 300 and a discharge plate and a pelletizing net at its lower part. The discharge plate has a through discharge hole and a connecting hole. The bull horn turntable 300 is arranged on the discharge side of the sleeve, and a feeding space is formed between the inner side of the sleeve and the screw 001. The bull horn turntable 300 is connected to the screw 001 or the main shaft drive by the connecting hole (that is, the rotation of the bull horn turntable 300 can be directly or indirectly driven by the main shaft, and being connected to the screw 001 also belongs to a case where it is indirectly driven by the main shaft) to rotate in the same direction or in the opposite direction with the screw 001, and the discharge hole is connected to the feeding space; the pelletizing net is formed in the lower space of the bull horn turntable 300 (that is, the lower part of the discharge plate) to form a cavity on the inner side of the pelletizing net; at least part of the area on the pelletizing net is formed with a mesh connected to the cavity.

[0062] That is to say, the pelletizing net can directly cover the entire lower space of the bull horn turntable 300 from below in a covering form (at this time, the range of the mesh holes on the pelletizing net can be the entire range of the lower part of the bull horn turntable 300 where the pelletizing net is located, so that an extrusion space in a larger range can be obtained), and the material delivered by the feeding part, no matter in what form (including powder, granules or fine particles of crushed raw materials), limits the space for the material to undergo extrusion phase change. In this space, when the solid part of the material receives enough pressure and undergoes extrusion, friction, heat generation, etc., it changes from a solid state to a mobile phase, such as a liquid, and is extruded from the mesh holes on the pelletizing net. The extruded material can form particles under the action of gravity or a scraper arranged on the outside of the mesh holes, thereby completing the granulation.

[0063] In the above scheme, the ox-horn turntable 300 also has a pair of opposite faces, and the ox-horn turntable 300 is set to the discharge side of the sleeve through one face; the extrusion granulation part also includes a granulation base, and the granulation base is set opposite to the other side of the ox-horn turntable 300; the granulation net is formed on the circumference of the space between the granulation base and the ox-horn turntable 300, that is, the ox-horn turntable 300, the granulation base and the granulation net formed between the two form a cavity together. At this time, by setting the granulation base, not only can a higher structural firmness be obtained from below, but also the granulation direction and spatial position can be controlled, and the controllability is better.

[0064] In the above scheme, further, along the rotation direction of the ox-horn turntable 300, the thickness of the portion of the extension protruding from the other side gradually increases, in this way, while achieving stirring, a better pressurization effect can also be obtained. Furthermore, the projection of the entire extension on the other side is in an arc shape, and the arc-shaped extensions each tend to be integrally around the rotation axis of the ox-horn turntable 300, while achieving a better stirring and pressurization effect, a lower resistance can also be obtained, and it is easy to clean.

[0065] In the above scheme, the extrusion granulation part also includes a cutter seat and a cutter set on the cutter seat, the cutter seat is driven by the main shaft, the cutter is set on the outside of the granulation net, and the cutting part of the cutter cooperates with the mesh of the granulation net, so that the cutter is close to the granulation net and rotates around the granulation net during operation, so as to cut and granulate the extruded material. At this time, the cutter seat can be a disc-shaped integral structure or a frame structure with a mounting hole in the center, and the cutter seat is connected to the main shaft through the mounting hole. The cutter seat can be located below the granulation base, and the cutter is vertically installed on the edge of the cutter seat, so that the cutter is formed around the granulation net. This scheme is particularly suitable for the aforementioned ox horn turntable 300, the granulation base and the granulation net formed between the two to form a cavity together; of course, when the lower part of the discharge net does not have a mesh and only discharges from the side, it also has a good application effect. Of course, when the horn turntable 300 and the discharging net form a cavity together, when the discharging net has mesh holes in addition to the side part and the lower part also has mesh holes, a cutter can also be arranged at the center of the corresponding cutter seat for cutting the discharging granulation of the lower part of the discharging net. The cutting blades of all the cutters installed on the cutter seat are facing the mesh part of the discharging net and are close to the part so as to perform cutting when the two are in relative motion.

[0066] In the above scheme, the sleeve also has a feed side provided with a feed port, which is connected to the feed space; the feeding part also includes a dust recovery cyclone device, and the air inlet pipe opening of the dust recovery cyclone device is arranged at the feed port. When the raw material enters the sleeve from the feed port and is transported to the discharge end under the action of the screw 001, the dust that may be generated at this time due to the flow of the raw material or being squeezed and crushed, etc., can enter the dust recovery cyclone device through the air inlet pipe opening of the dust recovery cyclone device, thereby playing a role in eliminating dust.

[0067] In the above scheme, the collection part also includes a collection device with a collection space and an exhaust device (such as an exhaust fan and a suction pipe). The collection space is connected to the peripheral side of the granulation net to receive the material extruded and cut by the mesh after granulation; the exhaust port of the exhaust device is connected to the collection space (such as a silo) to suck the material therein to the exhaust port. The granulated granules enter the suction pipe under the suction action of the exhaust fan, and then enter the discharge cyclone device to separate the granules, which is conducive to continuous production. The exhaust gas generated by the exhaust device in this process is further cooled down, and at the same time, impurities and dust are removed, which cannot be achieved by using the water cooling technology of the prior art. The exhaust pipe of the discharge cyclone device can be connected to the dust recovery cyclone device for further dust removal. The recycle of the dust recovery cyclone device can enter the production and processing process again to achieve recycling. Of course, due to the wind suction and separation here, the granules can also be further cooled while being separated, even without the need for additional cooling again.

[0068] When the present invention is used, the control box controls the start of the reducer, and the reducer drives the conical screw 001, the horn turntable 300 and the cutter to rotate through the main shaft, and the raw material is injected from the feed port (the hopper can be used to assist in feeding), and the material is brought in through the oblique ribs on the conical screw 001 and moves downward. The mixed material is extruded and falls between the discharge plate and the particle discharge net. Due to continuous feeding and continued extrusion, the materials therebetween are heated and fused by friction, so that they adhere to each other. With the continuous addition of the mixed material, the material at the lower end is squeezed out of the particle discharge net by the extrusion force. When the material is squeezed out of the particle discharge net to a certain length, the cutter cuts off the extruded material, and the material falls into the interior of the cavity. The particles inside the cavity are sucked out of the discharge hole again by the suction force of the fan for separation, and enter the discharge cyclone device to realize the separation of the particle material.

[0069] The above-mentioned dust recovery cyclone device or discharge cyclone device both include an independent cyclone separator.

[0070] The pellet discharging net of the present invention is provided with mesh holes, and the mesh hole diameter at the upper end of the pellet discharging net and the distance between the cutter and the pellet discharging net can be adjusted to meet the actual production requirements.

[0071] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0072] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A low temperature granulator, comprising a feeding part, a feeding part provided with a screw, an extrusion granulation part, a power part connected to a main shaft driven by a motor, and a collecting part, wherein the main shaft drives the screw, characterized in that: The outer surface of the screw is provided with an integrally formed thread arranged around the axis, the screw comprises a first screw and a second screw, the first screw has a first end, the second screw has a second end, the first screw is coaxially movably connected with the second end of the second screw through the first end, the cross-sectional diameter of the screw perpendicular to the axis decreases from the first screw to the second screw, the other end of the second screw opposite to the second end is a third end, the third end is also connected to a bull horn turntable, and the bottom of the bull horn turntable is a ladder-shaped structure; The second screw has a first connecting hole which passes through the second screw body from the second end and is connected to the third end; The portion of the horn turntable adjacent to the third end has a second connection hole arranged corresponding to the second screw connection hole, and the second connection hole is a countersunk hole; The second screw also includes a first connecting piece, which passes through the first connecting hole and is connected to the second connecting hole by the second end of the second screw. A disc-shaped discharge plate is also provided at the lower part of the bull horn turntable, and a discharge hole is formed on the discharge plate. The discharge hole is an elongated hole and is radially arranged in a radial form.

2. The low-temperature granulator according to claim 1, characterized in that The screw rod is also provided with a second connecting member. The first screw rod and the second screw rod are respectively provided with a third connecting hole and a fourth connecting hole which are both through holes. The third connecting hole and the fourth connecting hole are connected by the second connecting member.

3. The low temperature granulator according to claim 2, characterized in that: The first screw and the second screw of the screw rod are respectively provided with a first axial hole and a second axial hole at their respective central axis positions, and the first axial hole and the second axial hole are both matched and sleeved and connected to the main shaft.

4. The low-temperature granulator according to claim 3, characterized in that: The first shaft hole and the second shaft hole are formed with a first clamping groove and a second clamping groove at their respective sides, and the first clamping groove and the second clamping groove are both recessed from the main shaft toward the screw rod; A clamping protrusion is formed on the main shaft, the clamping protrusion protrudes from the main shaft toward the screw rod, and the clamping protrusion is matched and clamped into the corresponding clamping groove.

5. The low temperature granulator according to claim 1, characterized in that: The power part also includes a reducer, a power output end of the reducer is drivingly connected to the main shaft, and the motor is drivingly connected to the power input end of the reducer.

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