CN113211675A

CN113211675A - Filter for granulator

Info

Publication number: CN113211675A
Application number: CN202110693868.4A
Authority: CN
Inventors: 柏建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-03
Filing date: 2021-06-22
Publication date: 2021-08-06
Anticipated expiration: 2041-06-22
Also published as: CN113211675B; CN113246335A; WO2022166078A1; CN113246335B

Abstract

The invention discloses a filter for a granulator, which comprises a screen plate, a ox horn scraper, a porous flange, a discharging part and a granulating flange, wherein the screen plate is provided with a plurality of holes; the oxhorn scraper is matched with the screen plate impurity removal notch, so that the impurities are effectively separated from the molten material, and the separation of the molten material is not influenced; the screen plate is arranged to be attached to the ox horn scraper anticlockwise and rotates, normal materials are extruded through the screen plate under the extrusion and ox horn scraping effects, the materials are conveyed, incompletely-melted materials can be further extruded and melted, impurities in the materials are separated from the melted materials, the effect of assisting in extrusion and melting is achieved, the materials are completely melted, the compactness of the materials is good, the mechanical performance of granulation is good, the strength is high, the purity of the granulated materials and the quality of granulation can be improved, and the practicability is good.

Description

Filter for granulator

Technical Field

The invention belongs to the field of filtration, and particularly relates to a granulator with a filter arranged inside.

Background

A screw pelletizer is a forming machine that can produce materials into specific shapes, the molten polymer is extruded from a die, a rotating knife cuts pellets, the pellets are cooled and enter a dryer, but the pelletizer generates certain waste after operation and needs to be filtered.

In the prior art, a granulator in chinese patent CN 110757674A filters impurities through a filter plate, but realizes separation of impurities of molten materials, which may peel off material transportation of a pressure section, and the impurity transportation may affect normal material transportation and separation, and has low separation efficiency, and separation of impurities in the separation process may affect extrusion uniformity of the molten materials; chinese patent CN 110152556A sets up ox horn scraper, and it is direct through extruding the granule, can't discharge the influence of impurity to the material when the melting, causes granule compactness and mechanical strength to receive the influence, influences the granulation quality.

In order to filter the impurity materials, the chinese patent CN206951137U has a material filtering device arranged at the discharge port of the main body of the granulator to effectively filter the waste materials generated by the granulator; however, because the problem of low filtration efficiency and easy blockage caused by filtration after re-cooling is solved, although some attempts to filter before granulation, the problem that the design difficulty is high and the requirements on the melting degree and uniformity of the material are high still exists, and therefore a novel granulator with a filtering device needs to be developed, so that the material is more uniformly and efficiently melted on one hand, and the problem encountered at present is solved by directly filtering the melted material on the other hand.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a granulator which is convenient to use, simple to operate, free from heating, capable of being matched with a spiral feeding structure, better separating impurities in a molten material in an extrusion and manner, capable of separating the impurities and ensuring that the molten material is mixed and compacted more uniformly, capable of ensuring granulation quality, and practical and wide in use.

In order to solve the problems, the invention adopts the following technical scheme:

a filter for a granulator comprises a screen plate, a ox horn scraper, a porous flange and a discharging part; the filter is positioned before the granulator extrudes and granulates, and the filter separates impurities from the molten material of the granulator and discharges the impurities in the material through the discharging part;

one end of the porous flange is fixedly connected with the granulator; the outer side of the other end of the porous flange is fixedly connected with a grain discharging flange; the interior of the porous flange is hollow and is provided with uniform holes which are axially communicated, and the screen plate is positioned between the ox horn scraper and the uniform holes of the porous flange and can filter molten materials; the ox horn scraper is coaxial with a screw rod of the granulator and is controlled to rotate by the same motor; an impurity removal notch is formed in the inner ring surface of the cylinder in the hollow interior of the porous flange and is arranged at the lower edge of the ox horn scraper;

furthermore, the lower end of the porous flange is fixedly connected with a discharging part, the discharging part is communicated with the porous flange through the impurity removal gap, and the discharging part comprises an impurity discharging pipe, an impurity discharging flange and a rotating handle and is connected with the porous flange through the impurity removal gap; the discharging part controls the impurities to be discharged from the impurity removing port through the rotating handle and the impurity discharging flange;

the grain discharging flange comprises a grain discharging plate and a flow guiding cone, the grain discharging flange is a hollow cylindrical inner ring surface, one side of the hollow cylindrical inner ring surface of the grain discharging flange is fixedly connected with the porous flange, the grain discharging plate is positioned on the other side of the hollow cylindrical inner ring surface of the grain discharging flange and is fixedly connected with the flow guiding cone, the flow guiding cone is positioned inside the grain discharging flange, the bottom surface of the flow guiding cone is arranged on the grain discharging plate, the flow guiding cone is integrally conical, and the sectional area of the flow guiding cone at the porous flange in the direction towards the grain discharging plate is gradually increased; the utility model discloses a porous flange, including a flow guide cone, a granule board, a cutter, a granule board, a granule extruding hole, a granule discharging hole, a granule, and a granule discharging hole, a granule, and a granule, and a granule, and a granule, and a granule, and a granule, and a granule, and a granule.

The invention has the beneficial effects that:

according to the invention, the oxhorn scraper is matched with the screen plate impurity removal notch, so that the impurities are effectively separated from the molten material, and the separation of the molten material is not influenced; it sets up and hugs closely the otter board at the ox horn scraper anticlockwise rotatory, extrude the normal material extrusion under the effect of pressing of scraping of extrusion pressurization and ox horn and not only carry the material, can also further not totally melt the material and extrude the melting, and with impurity and the separation of melting material in the material, rely on impurity to separate with the melting point of melting material, impurity can stop on the otter board, and the melting material can pass through the otter board in further extrusion, the rethread goes out a flange grain, and the ox horn is rotatory to be scraped impurity and is taken away, take the breach department in the porous flange, send to and unload the impurity hole.

Simultaneously, the melting material after the extrusion through ox horn scraper carries out the material under the drainage of water conservancy diversion awl and piles up behind the otter board through densely covered micropore, is favorable to the further mixing of material on the one hand, and on the other hand reduces the not intensive mixing of melting material and extrudes the granulation, increases the compactness of melting material and then increases particle strength, avoids impurity separation to extrude the granulation in-process material jam net gape and then influence continuous granulation. Compared with the method of directly extruding and granulating by the ox horn scraper, the mixing compactness and the anti-blocking performance of the materials before extrusion are kept better by the diversion cone and the granule outlet flange than by the direct extrusion by the ox horn scraper; on this basis, set up simultaneously at the melting back end and filter the water conservancy diversion and utilize the mobility characteristics of melting material more easily, can also reduce screw rod conveying section material and pile up the space not enough and then arouse that material conveying efficiency is low and material putty.

The invention also provides an application example of the granulator with the filter inside, the filter is combined with a screw extrusion device of the granulator, the impurities are removed, and the screw can be assisted to extrude the material to promote the material to be fully and completely melted, so that the granulation quality of the material is improved;

the screw extrusion adopts the mode of combining multi-section matched extrusion and extrusion impurity removal, so that the temperature rise of the material is realized by gradual extrusion, and the uniformity of material melting is realized. In screw conveying and melting, raw materials are conveyed by feeding, so that material overflow is avoided, and the materials generate thermal convection and friction shearing in a melting section, so that the raw materials are sufficiently melted and homogenized; meanwhile, the banburying section further optimizes and balances the raw material component specification by changing the force and direction of shearing force to the material to generate an ideal structure, and has the mixing function of pervasiveness and dispersibility; the homogenizing section conveys and pressurizes the materials to make the raw materials have a certain relative density at the die orifice and promote further mixing.

The melted materials pass through the grain discharging flange under the pressure of the conveyed materials, are extruded through the extrusion holes of the grain discharging plate, and are granulated under the action of the cutter; meanwhile, the air injection pipe is arranged at the cutter, and the material which is extruded from the particle discharging plate or is cut and the cutter are rapidly cooled under the action of blowing, so that the material particles are not bonded, the material is not bonded on the cutter, the cutter can continuously work conveniently, the particle material can conveniently enter the winnowing mechanism, and the normal operation of the granulator is ensured; simultaneously, the screw edges from the middle section of the screw rod to the adjusting block are uniformly distributed, so that the pressure after the front half section of the screw edges is pressurized is released, and the granulation is more convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, but the present invention is not limited to the scope of the present invention.

FIG. 1 is a schematic view of the filter of the present invention;

FIG. 2 is a schematic cross-sectional view of a filter according to the present invention;

FIG. 3 is a schematic diagram of the pelletizer including a filter according to the present invention;

FIG. 4 is a schematic view of the internal structure of the pelletizer;

FIG. 5 is a schematic view of the screw structure of the present invention;

FIG. 6 is a schematic view of the baffle mounting of the pelletizer of the present invention;

FIG. 7 is a schematic view of a gas lance installation of the present invention;

FIG. 8 is a schematic view of the bushing mounting position of the pelletizer of the present invention;

figure 9 is a schematic view of another screw configuration for a pelletizer in accordance with the present invention.

The pneumatic separation device comprises a wind rotating cover 1, a sleeve 2, a transmission motor 3, a reduction box 4, a cutter motor 5, an air inlet connector 6, a grain outlet connector 7, an exhaust hole 8, a feed inlet 9, a partition plate 10, a grain discharging plate 11, a screw rod 12, a screw rib 13, a material containing cavity 14, a material containing cavity 15, a feeding section 16, a melting section 17, an air outlet 18, a cutter seat 19, a cutter, a motor shaft 20, a screw motor shaft 201, a screw motor shaft 21, an air injection pipe 22, a homogenizing section 23, a material containing groove 24, a material main inlet 25, an air separation mechanism 26, a through hole 27, a thread groove 27, a mixed mixing section 28, a first mixed mixing section 2811, a second mixed mixing section 2812, a porous flange 31, a 32 screen plate, a ox horn scraper 33, a grain discharging flange 34, a flow guide cone 35, a impurity removing notch 36, an impurity removing pipe 37, an impurity removing flange 38 and a rotating handle 39.

Detailed Description

Example 1

A filter for a granulator comprises a screen plate 32, a ox horn scraper 33, a porous flange 31 and a discharging part, wherein the porous flange 31 is positioned at one end far away from a feed inlet of a sleeve, and one end of the porous flange 31 is fixedly connected with the sleeve; the outer side of the other end of the porous flange 31 is fixedly connected with a grain discharging flange 34; the porous flange 31 is hollow and provided with axially through uniform holes, and the screen plate 32 is positioned between the ox horn scraper 33 and the uniform holes of the porous flange 32 and can filter molten materials; the oxhorn scraper 33 is coaxial with the screw 12 and is controlled to rotate by the same motor; an impurity removal notch 36 is arranged on the inner ring surface of the cylinder in the hollow part of the porous flange 31, and the impurity removal notch 36 is arranged on the lower edge of the ox horn scraper 33; furthermore, the lower end of the porous flange 31 is fixedly connected with a discharging part, the discharging part is communicated with the porous flange through an impurity removing notch 36, the discharging part comprises an impurity removing pipe 37, an impurity removing flange 38 and a rotating handle 39, and is connected with the porous flange 31 through the impurity removing notch 36; the discharging part controls the impurities to be discharged from the impurity removing port through a rotating handle 39 and an impurity discharging flange 38;

the pellet discharging flange 34 comprises a pellet discharging plate 11 and a flow guiding cone 35, the pellet discharging flange 34 is a hollow cylindrical inner ring surface, one side of the hollow cylindrical inner ring surface of the pellet discharging flange 34 is fixedly connected with the porous flange 31, the pellet discharging plate 11 is positioned on the other side of the hollow cylindrical inner ring surface of the pellet discharging flange 34 and is fixedly connected with the flow guiding cone 35, the flow guiding cone 35 is positioned inside the pellet discharging flange 34, the bottom surface of the flow guiding cone is arranged on the pellet discharging plate, the flow guiding cone is integrally conical, and the sectional area of the porous flange 31 in the direction towards the pellet discharging plate 11 is gradually increased; the diversion cone 35 realizes that the molten material of the porous flange 31 is drained to the grain discharging plate 11, the grain discharging plate 11 is provided with extrusion holes, the cutter is arranged on the outer side of the grain discharging plate 11, the position of the cutter is not shown in the figure, and the cutter cuts the extruded material into sections or grains.

Example 2

A granulator comprises the filter in embodiment 1, and further comprises an air rotating cover 1, a sleeve 2, a transmission motor 3, a reduction gearbox 4, a cutter motor 5, a granule outlet plate 11, a wind separation mechanism 25 and the filter, wherein the transmission motor 3 is connected with the reduction gearbox 4, the granule outlet plate 11 is fixed on the air rotating cover 1, two ends of the sleeve 2 are respectively fixed on the granule outlet plate 11 and the reduction gearbox 4, a screw 12 is arranged in the sleeve 2, and bearings are arranged at the connection positions of two ends of the screw 12, the reduction gearbox 4 and the granule outlet plate 11; the cutting knife is characterized in that the cutting knife motor 5 is installed on one side of the cyclone cover 1, a motor shaft 20 is installed on the cutting knife motor 5, one end of the motor shaft 20 extends to the inner side of the cyclone cover 1, a through hole 26 is formed in the motor shaft 20 along the axis direction, an air outlet 17 connected with the through hole 26 is formed in one end of the motor shaft 20, an air injection pipe 21 is installed on the air outlet 17, a cutting knife seat 18 is installed at one end of the motor shaft 20, a cutting knife 19 is installed on the cutting knife seat 18, and the cutting knife 19 is connected with the cutting knife seat 18 through screws; one end of the air jet pipe 21 extends to the cutter 19, a wind separation mechanism 25 is arranged on the air jet pipe, and the wind separation mechanism 25 is connected with the grain outlet joint 7 of the wind cyclone cover 1

An air inlet and a grain outlet are arranged on the air rotating cover 1, an air inlet connector 6 is arranged on the air inlet, a grain outlet connector 7 is arranged on the grain outlet, a partition plate 10 is arranged in the air rotating cover 1 opposite to the air inlet connector 6, and an air duct for upward air outlet is formed between the partition plate 10 and the air rotating cover 1;

the cyclone cover 1 cools the cut particle materials quickly through the air outlet of the air duct, and meanwhile, the particle materials are pressed and conveyed to the particle outlet, so that the winnowing is convenient.

A screw ridge 13 is arranged on the screw 12, and a feed inlet 9 is arranged at one end of the sleeve 2; a material containing cavity 14 with a certain space is formed between the screw ridge 13 and the sleeve 2, and the material containing cavity 14 extrudes and pressurizes materials through the screw 12 in a gradually-changed mode on the bottom diameter of the screw so as to melt the materials; a feed inlet 9 is arranged at one end of the sleeve 2, the volume of a material containing cavity 14 formed from one end of the feed inlet 9 to the middle section of the screw 12 between the screw ridge 13 and the sleeve 2 is different, a thread groove 27 which is matched with the screw ridge 13 and can form a certain airtight space is arranged on the sleeve 2, and the material is extruded, pressurized and melted in the material containing cavity 14 with different volume by the screw 12; one end of the screw 12 is a screw motor shaft 201 connected with the motor;

the screw 12 comprises a feeding section 15, a melting section 16, an internal mixing section 28 and a homogenizing section 22;

the feeding section 15 and the melting section 16 are in double-head spiral from the feeding port of the sleeve to the far end direction, and the bottom diameter of the feeding section 15 is distributed in an equal diameter way from the feeding port to the far end direction; the bottom diameter of the melting section 16 gradually increases in the distal direction along the feed opening.

The spiral pitches of the melting section 16 and the feeding section 15 are equal; the melting section 16 has a blocking effect on the materials, and the extrusion pressure between the materials is increased, so that the materials are more conveniently melted, and the melting efficiency is accelerated;

the screw rod of banburying section 28 is isometric and have the inclined sawtooth-shaped protrusion of the double interval of ring screw rod circumference on the screw rod, arrange and form the passageway that can supply the melting material to pass through with the horizontal axis certain angle of slope by the sawtooth-shaped protrusion between, homogenization section 22 is single spiral end footpath crescent to the extension from the junction with banburying section 28, the material after the melting of being convenient for is carried, increases certain pressure, thereby accomplish the material of melting and extrude once more, make the material melting better.

The sleeve 2 is provided with a thread groove 27 matched with the screw ridge 13 on the screw 12, and the screw ridge 13 and the outer surface of the screw 12 form a closed space to extrude and push materials;

the length of the banburying section 28 is 1/8-1/4 of the length of the thread of the feeding section 15;

the mixing section 28 of the screw 12 is located at 1/3-1/2 of the position of the feed section of the screw 12, the mixing section 28 is arranged between the melting section 16 and the homogenizing section 22;

a homogenizing section 22 is arranged on one side of the melting section 16, and the homogenizing section 22 enables the melted materials to be more compact, so that the melted materials are better in integrity and uniform in granulation during extrusion;

the axial length ratio of the melting section 16 to the feeding section 15 is 8:5.2, the axial length ratio of the melting section 16 to the homogenizing section 22 is 8:7.8, the adjacent screw pitch ratio of the feeding section 15 to the melting section 16 is 1:1, the adjacent screw pitch ratio of the melting section 16 to the homogenizing section 22 is 1: 1.3, and the angle between the channel of the banburying section 28 and the horizontal shaft is 30 degrees

The screw diameter of the end of the screw feeding section close to the feed inlet and the screw diameter of the end of the melting section far away from the feed inlet are 1:1.8, and the screw diameter of the end of the homogenizing section close to the feed inlet and the screw diameter of the end of the homogenizing section far away from the feed inlet are 1.22: 1.65.

The middle part of the sleeve 2 is provided with an exhaust hole 8, and the exhaust hole 8 is positioned at one side of the homogenizing structure 22. The sleeve 2 releases the pressure generated by the melted materials through the vent holes 8 to avoid overlarge pressure; the end of the screw 12 close to the feed inlet is of a conical structure.

The height of the sleeve 2 is matched with the height of the screw ridge 13 which is gradually reduced, so that the uniform cross-sectional area of the screw 12 and the screw ridge 13 can be ensured, and the conventional cylindrical sleeve 2 can be adopted.

Further, as another preferred embodiment, two mixing sections may be provided in the screw, the first mixing section 2811 is provided in the middle of the melting section to divide the melting section into two parts, and the second mixing section 2812 is provided between the melting section and the homogenizing section, and the mixing section may be provided in one section of the feeding section or the homogenizing section to realize step pressurization according to actual needs.

When the material head processing device is used, a material head to be processed is conveyed into a material main inlet, the material enters a sleeve from a feeding hole, a transmission motor drives a screw to rotate under the action of a reduction gearbox, the screw drives the material to rotate under the action of a screw rib in the rotating process, the material is extruded under the action of the height of the screw rib and the gradual reduction of a material containing cavity, the temperature of the material is increased, so that the material is melted, the melted material enters a material containing groove from a melting structure to be melted again, then enters a screen plate under the action of the homogenizing structure and the screw rib, is further melted under the thrust extrusion action of a ox horn scraper, impurities in the material are attached to the screen plate, and the impurities are discharged to an impurity removal notch through the rotation of the ox horn scraper; the material from the screen plate enters the flow guiding cone, is stacked and mixed in the grain discharging flange and is extruded out through the extrusion holes of the grain discharging plate under the extrusion action; when the material is extruded from the extrusion hole, the motor drives the cutter to rotate, and the cutter cuts the extruded material into granules or sheets; in the cutting process of the cutter, air sent out by external air supply equipment is blown out from a through hole of a motor shaft through an air outlet and an air injection pipe, so that materials caused by the cutter are cooled, and the cutter is cooled uninterruptedly; meanwhile, a fan connected with the air inlet connector works, air is blown out from the air duct, and the cut particle materials enter the air separation mechanism from the particle outlet under the action of air pressure and the negative pressure of the air separation mechanism.

The cutter is connected with the cutter seat through the screw, so that the cutter is convenient to replace and maintain later.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims

1. A filter for a pelletizer, characterized by: comprises a screen plate, a oxhorn scraper, a porous flange, a discharging part and a grain discharging flange; the filter is used for separating impurities from the molten material passing through the screw of the granulator before granulation by the granulator and discharging the impurities in the material through the discharging part.

2. A filter for a pelletizer as set forth in claim 1, wherein:

one end of the porous flange is fixedly connected with the extrusion part of the granulator; the outer side of the other end of the porous flange is fixedly connected with a grain discharging flange; the inside of the porous flange is hollow and is provided with uniform holes which are axially communicated, and the screen plate is positioned between the ox horn scraper and the uniform holes of the porous flange to filter the molten material.

3. A filter for a pelletizer as claimed in claim 1 or 2, said ox horn scraper being coaxial with the screw of the pelletizer and being controlled to rotate by the same motor; the inner ring surface of the cylinder in the hollow of the porous flange is provided with an impurity removal notch which is arranged at the lower edge of the ox horn scraper.

4. A filter for a pelletizer as set forth in claim 1, wherein: the lower end of the porous flange is fixedly connected with a discharging part, and the discharging part is communicated with the porous flange through the impurity removing notch.

5. A filter for a pelletizer as set forth in claim 1, wherein: the discharging part comprises a impurity discharging pipe, an impurity discharging flange and a rotating handle, and is connected with the porous flange through an impurity removing notch; the discharging part controls the impurities to be discharged from the impurity removing port through the rotating handle and the impurity discharging flange.

6. A filter for a pelletizer as set forth in claim 1, wherein: the grain discharging flange comprises a grain discharging plate and a flow guide cone, the grain discharging flange is a hollow cylinder inner annular surface, one side of the hollow cylinder inner annular surface of the grain discharging flange is fixedly connected with the porous flange, and the grain discharging plate is positioned on the other side of the hollow cylinder inner annular surface of the grain discharging flange and is fixedly connected with the flow guide cone.

7. A filter for a granulator, as set forth in claim 6, wherein: the flow guide cone is positioned inside the grain outlet flange, the bottom surface of the flow guide cone is arranged on the grain outlet plate, the whole flow guide cone is conical, and the sectional area of the flow guide cone at the position of the porous flange in the direction of the grain outlet plate is gradually increased.

8. A filter for a granulator, as set forth in claim 7, wherein: the utility model discloses a porous flange, including a flow guide cone, a granule board, a cutter, a granule board, a granule extruding hole, a granule discharging hole, a granule, and a granule discharging hole, a granule, and a granule, and a granule, and a granule, and a granule, and a granule, and a granule, and a granule.

9. A granulator comprising a filter for a granulator according to any of claims 1 to 8.

10. A granulator according to claim 9, characterized in that: the screw rod is followed telescopic feed inlet department divides into charge segment, melting section, banburying section and homogenization section to the distal end direction, charge segment and melting section are used for to the material extrusion melting of pressure-charged gradually, the banburying section is to the material further pressure boost through charge segment and melting section, the homogenization section is to the material pressure release through the banburying section back pressure-charged misce bene gradually again.