Incongruous double helix desulfurization extruder
阅读说明:本技术 一种异向双螺旋脱硫挤出机 (Incongruous double helix desulfurization extruder ) 是由 周洪 赵勇 施嘉华 江卫峰 朱明辉 吴军 周耀辉 于 2020-07-31 设计创作,主要内容包括:本发明提供了一种异向双螺旋脱硫挤出机,涉及橡胶再生设备技术领域,包括机筒,机筒上设有进料口和出料口,机筒内定位转动安装两根结构相同、平行且相背异向转动的螺杆;每根螺杆包括进料段、混炼段和出料段,两根螺杆上的进料段非共轭无啮合,混炼段和出料段分别共轭啮合;混炼段包括第一混炼组、第二混炼组、第三混炼组,第一混炼组、第二混炼组和第三混炼组均包括第一螺纹和第二螺纹,第一螺纹的螺纹导程是第二螺纹的螺纹导程的1.5倍;第一混炼组、第二混炼组和第三混炼组中第一螺纹的螺纹导程和螺纹长度均相同,第二螺纹的螺纹导程相同,螺纹长度比为4∶3∶5。本发明使用时,实现胶粒的彻底再生,有效降低能耗,提高产品性能。(The invention provides a heterodromous double-helix desulfurization extruder, which relates to the technical field of rubber regeneration equipment and comprises a machine barrel, wherein a feed inlet and a discharge outlet are formed in the machine barrel, and two parallel screws which have the same structure and rotate reversely are positioned and rotatably installed in the machine barrel; each screw comprises a feeding section, a mixing section and a discharging section, the feeding sections on the two screws are not in conjugate and meshed, and the mixing section and the discharging section are respectively in conjugate meshed; the mixing section comprises a first mixing group, a second mixing group and a third mixing group, the first mixing group, the second mixing group and the third mixing group respectively comprise a first thread and a second thread, and the thread lead of the first thread is 1.5 times that of the second thread; the first screw thread lead and screw length of the first screw thread in the first mixing group, the second mixing group and the third mixing group are the same, the screw thread lead of the second screw thread is the same, and the screw length ratio is 4: 3: 5. When the invention is used, the colloidal particles are thoroughly regenerated, the energy consumption is effectively reduced, and the product performance is improved.)
1. The utility model provides a two spiral desulfurization extruders of heterodromous which characterized in that: the device comprises a machine barrel (1), wherein one end of the machine barrel (1) is provided with a feeding hole (121), and the other end of the machine barrel is provided with a discharging hole (141); two parallel screw rods (2) are positioned and rotatably mounted in the machine barrel (1), and the two screw rods (2) have the same structure and rotate oppositely; each screw (2) comprises a feeding section (21) close to the feeding port (121) and a discharging section (23) close to the discharging port (141), a mixing section (22) is arranged between the feeding section (21) and the discharging section (23), the feeding sections (21) on the two screws (2) are not conjugated and meshed with each other, and the mixing section (22) and the discharging section (23) are respectively conjugated and meshed with each other; the mixing section (22) comprises a first mixing group (221), a second mixing group (222) and a third mixing group (223) which are sequentially arranged from a feeding section (21) to a discharging section (23), the first mixing group (221), the second mixing group (222) and the third mixing group (223) respectively comprise a first thread (3) and a second thread (4), the thread lead and the thread length of the first thread (3) and the second thread (4) are different, and the thread lead of the first thread (3) is 1.5 times that of the second thread (4); the first screw (3) in the first mixing group (221), the second mixing group (222) and the third mixing group (223) has the same screw lead and the same screw length, the second screw (4) has the same screw lead, and the screw length ratio of the second screw (4) in the first mixing group (221), the second mixing group (222) and the third mixing group (223) is 4: 3: 5.
2. A counter-rotating twin screw devulcanizing extruder according to claim 1, characterised in that: the feeding section (21) comprises a third screw thread (5), and the screw lead and the screw length of the third screw thread (5) are the same as those of the first screw thread (3) of the first mixing group (221).
3. A counter-rotating twin screw devulcanizing extruder according to claim 2, characterised in that: the discharge section (23) comprises a fourth thread (6), the thread lead of the fourth thread (6) being half of the thread lead of the first thread (3), the thread length of the fourth thread (6) being one quarter of the thread length of the first thread (3); a vent (142) is arranged on the machine barrel (1), and the vent (142) is positioned above the discharge section (23) of the screw (2).
4. A counter-rotating twin screw devulcanizing extruder according to claim 3 in which: and a mounting section (24) is arranged on one side of the feeding section (21) far away from the mixing section (22), the mounting section (24) comprises a fifth thread (7), the thread lead of the fifth thread (7) is the same as that of the fourth thread (6), and the thread length of the fifth thread (7) is half of that of the fourth thread (6).
5. A heterodromous twin screw devulcanization extruder according to claim 4, characterized in that: the discharge port (141) is arranged below the machine barrel (1), and the rotating direction of the fourth thread (6) in the discharge section (23) is opposite to that of the first thread (3), the second thread (4), the third thread (5) and the fifth thread (7).
6. A counter-rotating twin screw devulcanizing extruder according to claim 4 or 5, characterised in that: the diameters of the two screws (2) are 135mm, the thread leads of the first thread (3) in the mixing section (22) and the third thread (5) in the feeding section (21) are both 144mm, and the thread lengths are both 576 mm; the thread lead of the second screw (4) in the mixing section (22) is 96mm, the thread length of the second screw (4) in the first mixing group (221) is 768mm, the thread length of the second screw (4) in the second mixing group (222) is 576mm and the thread length of the second screw (4) in the third mixing group (223) is 960 mm.
7. The counter-rotating twin screw devulcanizing extruder according to claim 6, wherein: the screw thread lead of a fourth screw thread (6) in the discharging section (23) and the screw thread lead of a fifth screw thread (7) in the mounting section (24) are both 72mm, the screw thread length of the fourth screw thread (6) is 144mm, and the screw thread length of the fifth screw thread (7) is 72 mm.
8. The counter-rotating twin screw devulcanizing extruder according to claim 7, wherein: the first threads (3) are formed by sequentially splicing a plurality of first screw elements (31) with thread leads and thread lengths of 144mm, and the second threads (4) are formed by sequentially splicing a plurality of second screw elements (41) with thread leads and thread lengths of 96 mm; the third thread (5) is formed by sequentially splicing a plurality of third screw elements (51) with thread leads and thread lengths of 144mm, and the groove depth of each third screw element (51) is greater than that of each first screw element (31); the fourth thread (6) is formed by splicing two fourth screw elements (61) with thread leads and thread lengths of 72 mm.
9. A counter-rotating twin screw devulcanizing extruder according to claim 1, characterised in that: the machine barrel (1) comprises a feeding zone (12), a discharging zone (14) and nine heating zones (13), wherein the temperature of four sections, close to the feeding zone (12), of the heating zones (13) is gradually increased, and the temperature of five sections, close to the discharging zone (14), of the heating zones is gradually decreased.
10. A counter-rotating twin screw devulcanizing extruder according to claim 9 in which: the machine barrel (1) comprises eleven sections of sleeves (11) which respectively correspond to the feeding zone (12), the heating zone (13) and the discharging zone (14), alloy linings (114) are arranged in the sleeves (11), and every two sleeves (11) are connected through splines (113) arranged on the side walls; the sleeve (11) is provided with connecting blocks (111) along the outer side walls of the two axial ends of the sleeve, and the connecting blocks (111) which are adjacent to each other are connected through bolts (112).
Technical Field
The invention relates to the technical field of rubber regeneration equipment, in particular to a counter-rotating double-helix desulfurization extruder.
Background
The consumption of rubber mainly based on tires in China is continuously and highly increased, so that China becomes the largest country for generating waste rubber in the world, the comprehensive utilization of the waste rubber is the core of the circular economy of the rubber industry, and the rubber recycling method has important significance for reducing the external dependence of rubber resources in China, saving petrochemical resources and protecting the environment. The method for preparing the reclaimed rubber by opening the three-dimensional cross-linked network of the waste rubber by using physical, chemical or biological methods and the like is the most main mode for recycling the waste rubber in China at present.
At present, most of reclaimed rubber enterprises at home and abroad still adopt a high-temperature dynamic devulcanizer, a plasticator and a screw extruder to carry out the desulfurization regeneration production of waste tires, but when desulfurization equipment such as the devulcanizer, the plasticator and a single screw extruder carries out desulfurization regeneration, reclaimed rubber products have heavy rubber peculiar smell due to incomplete kneading and shearing, and the mechanical properties of the products are poor. In order to realize the safety, simplicity, continuity, energy conservation and environmental protection of the production process, the double-screw extruder is gradually applied to the field of waste rubber desulfurization regeneration by scholars at home and abroad. The process for regenerating the waste rubber by using the double-screw extruder is simple, safe, continuous and environment-friendly, but the co-rotating double-screw extruder is adopted for implementing high shearing force, the co-rotating double-screw extruder rotates in the same direction, the generated shearing force is large, the main chain of rubber molecules is easily broken under the high-temperature condition, and the mechanical property of the regenerated rubber is greatly reduced although the three-dimensional network structure of the waste rubber can be efficiently destroyed.
Disclosure of Invention
The invention aims to provide a heterodromous double-screw desulfurization extruder, which is characterized in that a special heterodromous double-screw structure is designed, S-S bonds in colloidal particles are continuously sheared during regeneration without destroying C-C bonds, rubber materials are repeatedly kneaded repeatedly and continuously in a reciprocating mode through the heterodromous double-screw after crosslinking is released, and the rubber particles are directly extruded and molded, so that the complete regeneration of the colloidal particles is realized, the problems of entrainment and thermal oxidation in the regenerated rubber materials are solved, the energy consumption is effectively reduced, and the performance index of a product is improved.
The technical purpose of the invention is realized by the following technical scheme:
a bidirectional double-screw desulfurization extruder comprises a machine barrel, wherein one end of the machine barrel is provided with a feed inlet, and the other end of the machine barrel is provided with a discharge outlet; two parallel screws are positioned and rotatably mounted in the machine barrel, and the two screws are identical in structure and rotate oppositely and reversely; each screw comprises a feeding section close to the feeding port and a discharging section close to the discharging port, a mixing section is arranged between the feeding section and the discharging section, the feeding sections on the two screws are not conjugated and meshed with each other, and the mixing section and the discharging section are respectively conjugated and meshed with each other; the mixing section comprises a first mixing group, a second mixing group and a third mixing group which are sequentially arranged from the feeding section to the discharging section, the first mixing group, the second mixing group and the third mixing group respectively comprise a first thread and a second thread, the thread lead and the thread length of the first thread and the second thread are different, and the thread lead of the first thread is 1.5 times that of the second thread; the first, second and third mixing groups have the same thread lead and thread length of the first screw, the second screw has the same thread lead, and the ratio of the thread length of the second screw in the first, second and third mixing groups is 4: 3: 5.
By adopting the technical scheme, the feeding sections of the two screws are of a non-conjugate non-meshing structure, so that the feeding amount can be increased when large-particle solids are conveyed; the first mixing group, the second mixing group and the third mixing group realize reciprocating repeated kneading of rubber materials, and peel off the rubber materials layer by layer, so that the kneading and vulcanizing effects of the rubber materials are guaranteed, the rubber particles are thoroughly regenerated, and the rubber materials have no problems of entrainment and thermal oxidation; the discharge section is of a conjugate structure, and is used for conveying rubber viscous fluid to cool rubber materials and reduce the discharge temperature of the rubber. The thread lead of the second thread is smaller than that of the first thread, so that reciprocating repeated kneading and full complete kneading of the colloidal particles are realized by the first mixing group, the second mixing group and the third mixing group, and the kneading effect of the mixing section on the rubber material is optimal by designing the thread lead and the thread length of the first thread and the second thread of the mixing section. The two screws with the same structure rotate oppositely and oppositely, compared with double screws which rotate and shear in the same direction, the shearing force of the double screws in different directions is relatively small, so that the rubber material is fully kneaded in the vulcanization process, the C-C bond is not damaged while the S-S bond in the rubber particles is continuously sheared, the molecular chain of the rubber material is completely broken, and the vulcanization effect is improved. The counter-rotating double screws with the structure can solve the problems of half-cooked and peculiar smell of reclaimed rubber products in the prior art, effectively reduce energy consumption and improve the performance index of products.
Further, the feed section includes third flights having a flight lead and flight length that is the same as the flight lead and flight length of the first flights of the first mixing group.
Through adopting above-mentioned technical scheme, the screw thread lead and the screw thread length of third screw thread are the same with the screw thread lead and the screw thread length of the first screw thread of first mixing group in the feeding section, but the third screw thread is nonconjugated structure, and first screw thread is conjugated structure, can guarantee like this that the feeding speed of feeding section and the kneading speed perfect match of mixing section to the sizing material, avoid taking place that the sizing material supply is not enough or the sizing material piles up in the feeding section and influence the complete kneading of mixing section to the sizing material, its simple structure, the effect is obvious.
Further, the discharge section includes a fourth thread having a thread lead that is one half of the thread lead of the first thread and a thread length that is one quarter of the thread length of the first thread; and the machine barrel is provided with a gas outlet, and the gas outlet is positioned above the discharge section of the screw rod.
Through adopting above-mentioned technical scheme, the screw thread helical pitch and the thread length of fourth screw thread are all less relatively in the ejection of compact section, and fourth screw thread does not have kneading to the rubber viscous fluid like this, and the stroke of rubber viscous fluid at ejection of compact section is shorter, can realize quick ejection of compact. The air outlet arranged above the discharge section is arranged on the machine barrel, and the air outlet can assist the heat dissipation of rubber viscous fluid, so that the length of the discharge section of the screw is reduced, and the structure and the length of the screw are simplified.
And furthermore, a mounting section is arranged on one side of the feeding section, which is far away from the mixing section, and comprises a fifth thread, the thread lead of the fifth thread is the same as that of the fourth thread, and the thread length of the fifth thread is half of that of the fourth thread.
Through adopting above-mentioned technical scheme, set up and keep away from mixing section one side installation section at the feeding section and conveniently install the screw rod in the barrel, and when realizing the screw rod installation, avoid influencing the pay-off work of feeding section. The screw thread lead of fifth screw thread and screw thread lead and fourth screw thread is the same in the installation section, but thread length is half of fourth screw thread, need not the structure of additional design installation section like this, and the length of installation section is minimum as far as possible under the prerequisite that satisfies the user demand, simplifies the screw rod structure, reduces screw rod length, its simple structure, and the effect is obvious.
Further, the discharge port is arranged below the machine barrel, and the rotation direction of the fourth thread in the discharge section is opposite to the rotation direction of the first thread, the second thread, the third thread and the fifth thread.
Through adopting above-mentioned technical scheme, the discharge gate sets up in the below and the handedness of fourth screw thread and first screw thread, second screw thread, third screw thread and fifth screw thread to opposite, and the discharge section realizes reverse down guide when two screw rods are different to rotate like this to make rubber viscous fluid extrude from the discharge gate of below, avoid rubber viscous fluid to continue to carry forward, realize the ejection of compact downwards, compare in the ejection of compact more easily from the tip, its simple structure, the effect is obvious.
Further, the diameters of the two screws are 135mm, the screw leads of the first screw in the mixing section and the third screw in the feeding section are both 144mm, and the screw lengths are both 576 mm; the thread lead of the second screw in the mixing section was 96mm, the thread length of the second screw in the first mixing group was 768mm, the thread length of the second screw in the second mixing group was 576mm, and the thread length of the second screw in the third mixing group was 960 mm.
By adopting the technical scheme, through design and experimental demonstration, the diameters of the two screws are 135mm, the screw lead of the first screw and the third screw is 144mm, the screw length is 576mm, the screw lead of the second screw in the mixing section is 96mm, the screw length of the second screw in the first mixing group is 768mm, the screw length of the second screw in the second mixing group is 576mm, and the screw length of the second screw in the third mixing group is 960mm, and at the moment, the reciprocating repeated mixing effect of the screw mixing section on rubber materials is optimal.
Further, the thread leads of a fourth thread in the discharging section and a fifth thread in the mounting section are both 72mm, the thread length of the fourth thread is 144mm, and the thread length of the fifth thread is 72 mm.
Through adopting above-mentioned technical scheme, through design and experimental demonstration, the screw thread helical pitch of fourth screw thread and fifth screw thread is 72mm, and the thread length of fourth screw thread is 144mm, when the thread length of fifth screw thread is 72mm, the ejection of compact effect of ejection of compact section is best, and the structure of screw rod this moment is comparatively simplified, and length is moderate, satisfies the user demand.
Furthermore, the first threads are formed by sequentially splicing a plurality of first screw elements with thread leads and thread lengths of 144mm, and the second threads are formed by sequentially splicing a plurality of second screw elements with thread leads and thread lengths of 96 mm; the third thread is formed by sequentially splicing a plurality of third screw elements with thread leads and thread lengths of 144mm, and the groove depth of each third screw element is greater than that of each first screw element; the fourth thread is formed by splicing two fourth screw elements with thread leads and thread lengths of 72 mm.
By adopting the technical scheme, the first thread is formed by splicing a plurality of first screw elements, the second thread is formed by splicing a plurality of second screw elements, the third thread is formed by splicing a plurality of third screw elements, and the fourth thread is formed by splicing two fourth screw elements.
Further, the machine barrel comprises a feeding zone, a discharging zone and nine heating zones, wherein the temperature of the heating zone is gradually increased in four sections close to the feeding zone, and the temperature of the heating zone is gradually decreased in five sections close to the discharging zone.
By adopting the technical scheme, the machine barrel is divided into the feeding area, the discharging area and the heating area, the temperature of each part meets the kneading requirement, the temperature of the heating area is gradually increased, and when the rubber material is sheared and extruded in the mixing section, the interior of the rubber material is gradually and completely heated, so that the rubber material in the mixing section is completely kneaded; the heating zone cools gradually afterwards, and sizing material cools off so that by kneading, both guaranteed kneading of mixing section to sizing material, avoided the sizing material to reach discharge gate department when the high temperature again, realize cooling in advance, its simple structure, the effect is obvious.
Furthermore, the machine barrel comprises eleven sections of sleeves which respectively correspond to the feeding zone, the heating zone and the discharging zone, alloy linings are arranged in the sleeves, and every two sleeves are connected through splines arranged on the side walls; the sleeve is provided with connecting blocks along the outer side walls of the two axial ends of the sleeve, and the connecting blocks which are adjacent to each other are connected through bolts.
Through adopting above-mentioned technical scheme, set up the barrel into eleven sections sleeves, and realize dismantling the connection through spline and bolt between the sleeve, make things convenient for the installation of screw rod and the equipment of barrel like this, also make things convenient for the maintenance and the maintenance inside the barrel. Wherein, the alloy inside lining of setting in the sleeve plays wear-resisting effect, improves the life of barrel, reduces maintenance and the maintenance to the barrel, and its simple structure makes things convenient for operation and effect obvious.
In conclusion, the invention has the following beneficial effects:
1. the screw rods which are identical in structure, parallel to each other, opposite in direction and partially meshed are arranged in the machine barrel, each screw rod comprises a feeding section, a mixing section and a discharging section, and the thread leads and the thread lengths of the feeding section, the mixing section and the discharging section are designed, so that the S-S bond in the rubber particles is continuously sheared while the C-C bond is not damaged during regeneration, the rubber materials are repeatedly kneaded in a reciprocating manner after being uncrosslinked through the two screw rods in different directions, the rubber particles are directly extruded and formed, the thorough regeneration of the rubber particles is realized, the problems of entrainment and thermal oxidation do not exist in the regenerated rubber materials, the energy consumption is effectively reduced, and the performance index of the product is improved;
2. the feeding area, the heating area and the discharging area are arranged in the machine barrel, the heating area is heated and then cooled, the kneading effect on sizing materials is guaranteed, meanwhile, the cooling in advance is realized, and the extrusion of the sizing materials is accelerated; the barrel is arranged to be connected with a plurality of sections of the feeding area, the heating area and the discharging area in a one-to-one correspondence mode, the sleeves are detachably connected through splines and bolts, so that the screw rod is convenient to install and assemble the barrel, and the inside of the barrel is convenient to overhaul and maintain.
Drawings
FIG. 1 is a longitudinal cross-sectional view of a counter-rotating twin screw devulcanizing extruder taken along its length;
FIG. 2 is a transverse cross-sectional view of a counter-rotating twin screw devulcanizing extruder taken along its length;
FIG. 3 is a schematic view of the structure of one screw of a counter-rotating twin screw devulcanizing extruder;
FIG. 4 is a partial schematic view of two screws in a counter-rotating twin-screw desulfurization extruder for embodying a feed section and a partial mixing section;
FIG. 5 is a schematic view of a partial structure of two screws in a counter-rotating twin-screw desulfurization extruder, which is used for embodying a discharge section and a partial mixing section;
FIG. 6 is a schematic view of the structure of the barrel of a counter-rotating twin screw devulcanizing extruder.
In the figure, 1, a cylinder; 11. a sleeve; 111. connecting blocks; 112. a bolt; 113. a spline; 114. an alloy liner; 12. a feed zone; 121. a feed inlet; 13. a heating zone; 14. a discharge zone; 141. a discharge port; 142. an exhaust port; 2. a screw; 21. a feeding section; 22. a mixing section; 221. a first mixing group; 222. a second mixing group; 223. a third mixing group; 23. a discharging section; 24. an installation section; 3. a first thread; 31. a first screw element; 4. a second thread; 41. a second screw element; 5. a third thread; 51. a third screw element; 6. a fourth thread; 61. a fourth screw element; 7. a fifth thread; 71. a fifth screw element; 8. and a space ring.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A counter-rotating double-helix desulfurization extruder is shown in figure 1 and comprises a machine barrel 1, wherein one end of the machine barrel 1 is provided with a
As shown in fig. 1 and 3, each
As shown in fig. 3, the kneading
As shown in fig. 3,
As shown in fig. 3 and 4, the
As shown in fig. 3, in this example, the diameter of the two
As shown in fig. 4 and 5, in order to facilitate the mass production and installation of the
As shown in fig. 4 and 5, the
As shown in fig. 6, barrel 1 includes a feed zone 12, a discharge zone 14 and nine heating zones 13, and the nine heating zones 13 gradually increase in temperature in four zones near the feed zone 12 and gradually decrease in temperature in five zones near the discharge zone 14. In this embodiment, the heating zone 13 has a temperature of 190 deg.C, 210 deg.C, 240 deg.C, 250 deg.C, 240 deg.C, 220 deg.C, 130 deg.C, 100 deg.C, and 70 deg.C from the vicinity of the feeding zone 12 to the vicinity of the discharging zone 14. The temperature of the heating zone 13 is gradually increased, and when the rubber material is sheared and extruded by the mixing
As shown in fig. 6, in the present embodiment, the barrel 1 includes eleven sleeves 11 corresponding to the feed zone 12, the heating zone 13, and the discharge zone 14, respectively, the
The working principle and the using method of the invention are as follows:
bigger rubber particles are added into a machine barrel 1 from a
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
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