CN108384050B

CN108384050B - Waste rubber normal temperature regenerating unit

Info

Publication number: CN108384050B
Application number: CN201810203578.5A
Authority: CN
Inventors: 倪雪文; 施兆丰; 周洪; 赵勇; 王郁辉; 张国华; 赵建忠
Original assignee: Nantong Huili Rubber Co ltd
Current assignee: Nantong Huili Rubber Co ltd
Priority date: 2018-03-13
Filing date: 2018-03-13
Publication date: 2023-05-12
Anticipated expiration: 2038-03-13
Also published as: CN108384050A

Abstract

The invention provides a normal temperature regeneration device for waste rubber, which is characterized by comprising the following components: the device comprises an inner screw, an outer screw cylinder, a disc cutter, a feed inlet and a discharge outlet; the inner screw rod is sleeved in the outer screw cylinder, the inner screw rod is provided with screw blades, the inner wall of the outer screw cylinder is provided with screw grooves, and the screw blades and the screw grooves are distributed in a staggered manner; the number of the inner screws is left and right; the outer end of the inner screw is connected with the driving motor, the inner end of the inner screw is connected with the disc cutter, the disc surface of the disc cutter is perpendicular to the inner screw, and the disc surfaces of the left disc cutter and the right disc cutter are in surface contact at the middle part inside the outer screw cylinder. According to the normal-temperature waste rubber regeneration device provided by the invention, through mutual reverse rotation of the inner screw and the outer screw cylinder, the rubber material combination is subjected to full rotation, extrusion and shearing, so that the aim of key breaking regeneration is fulfilled, and each performance index of the produced regenerated rubber product is stable, high strength and low Mooney.

Description

Waste rubber normal temperature regenerating unit

Technical Field

The invention relates to the technical field of reclaimed rubber, in particular to a normal-temperature reclaimed rubber device.

Background

Reclaimed rubber refers to rubber which is obtained by crushing, heating, mechanical treatment and other physical and chemical processes of waste vulcanized rubber, and is changed into plastic and viscous rubber which can be vulcanized again. The essence of the regeneration process is that the vulcanized rubber network is broken and degraded under the combined actions of heat, oxygen, mechanical action, chemical and physical action of a regenerant and the like, and the breaking positions have crosslinking bonds and macromolecular bonds among the crosslinking bonds. The use of mechanical shear forces and high temperature heat of twin screws to break the molecular chains of rubber is one of the common means. The method has the advantages of high production capacity, obvious electricity-saving effect, simple and easy operation, realization of continuous plastication production and the like.

The present invention discloses a twin screw regeneration method disclosed in the prior art in China, for example, chinese patent CN102443190B discloses a waste rubber desulfurization regeneration device, which comprises: a barrel; a shaftless screw conveyor disposed inside the barrel; and a driving motor connected with the shaftless screw conveyor. When the shaftless screw conveyer rotates under the drive of the driving motor, materials in the machine barrel can be uniformly stirred, and meanwhile, the materials are pushed forward, so that the materials are subjected to full thermal oxidation reaction in the machine barrel to obtain regenerated rubber raw materials, thus, waste rubber particle materials cannot be retained on the shaftless screw conveyer, and the phenomenon of material scorching adhesion cannot occur, thus the components of scorched materials doped in new materials of the machine barrel are greatly reduced, and the quality and yield of the regenerated rubber raw materials are improved. Chinese patent CN103435840B discloses a waste rubber recycling device, which uses a regenerant, a spiral regeneration mechanism, a regeneration reaction device, a cooling device, an extrusion device, a shearing device and the like to realize desulfurization and regeneration of waste rubber.

In the prior art, the service life and the operation mode of the twin screw are key to restrict the efficiency of the twin screw, and the diameter of the twin screw determines the grade and the economy of the regeneration equipment. Based on the above circumstances, it is necessary to design an environment-friendly, energy-saving, stable, efficient and safe normal-temperature recycling device for waste rubber.

Disclosure of Invention

Based on the above situation, the invention provides a normal temperature regeneration device for waste rubber, and by using the device provided by the invention, various performance indexes of the produced reclaimed rubber product are stable, the Mooney rebound is less, the high strength and the low Mooney are realized, and the environment protection, energy saving, stability, high efficiency and safety of the reclaimed rubber production process are realized.

The technical scheme of the invention is as follows:

a normal temperature recycling apparatus for waste rubber, comprising: the device comprises an inner screw, an outer screw cylinder, a disc cutter, a feed inlet and a discharge outlet; the inner screw rod is sleeved in the outer screw cylinder, the inner screw rod is provided with screw blades, the inner wall of the outer screw cylinder is provided with screw grooves, and the screw blades and the screw grooves are distributed in a staggered manner; the number of the inner screws is left and right; the outer end of the inner screw is connected with a driving motor, the inner end of the inner screw is connected with the disc cutter, the disc surfaces of the disc cutters are perpendicular to the inner screw, and the disc surfaces of the left disc cutter and the right disc cutter are in surface contact at the middle part inside the outer screw cylinder; the feed inlet is positioned at the upper parts of the two ends of the inner screw rod, and the discharge outlet is positioned below the middle part of the outer screw cylinder.

On the basis, the axes of the inner screw and the outer screw cylinder are positioned on the same datum line, and the driving motor drives the left and right inner screws to rotate in opposite directions respectively. That is, when the inner screw at the left end rotates clockwise, the inner screw at the right end rotates counterclockwise.

On the basis, the spiral blade of the inner screw rod is not meshed with the spiral groove of the outer screw cylinder, and a certain interval is formed, wherein the interval is 100-260mm.

On the basis, the outer screw cylinder is composed of a left part and a right part, and the outer screw cylinder also rotates; and the rotation direction of each section of outer screw cylinder is opposite to that of the inner screw inside each section of outer screw cylinder. That is, when the outer screw tube rotates clockwise, the inner screw inside the outer screw tube rotates counterclockwise.

On the basis, the diameter of the disc cutter is larger than the rotation diameter of the outer edge of the helical blade of the inner screw rod, and the diameter of the disc cutter is also larger than the rotation diameter of the helical groove of the outer screw barrel; the middle part of the outer screw cylinder forms a circular concave cavity, and the disc cutter is positioned in the circular concave cavity.

On the basis, the lower part of the concave cavity is connected with a discharge hole, a filter screen is arranged above the discharge hole, the filter screen is provided with round screen holes, and the diameter of each screen hole is 80-120 meshes.

On the basis, the disc cutter is provided with a plurality of cutter holes, and the cutter holes of the two contact surfaces of the disc cutter are provided with cutting edges. The cutter hole is one of a circle, a triangle, a quadrangle and a polygon, the cutter hole can also be a special-shaped hole, the cutter hole is gradually enlarged from the contact surface of the disc cutter to the connecting end of the disc cutter, and the edge of the cutter hole of the contact surface of the disc cutter is provided with a cutting edge.

On the basis, a disk claw is arranged between the inner screw and the disk knife and used for connecting and fixing the inner screw and the disk knife; the disk claw comprises cross-shaped connecting claws, joints, an adapter and other parts, and the adapter consists of a rotating head and a rotating drum sleeved outside the rotating head.

On the basis, the position of the inner screw rod at the feed inlet is provided with a rotary protrusion, the tail end of the rotary protrusion is connected with the spiral blade, and the direction of the starting end of the rotary protrusion is opposite to the rotation direction of the inner screw rod.

On this basis, the outer edge of the helical blade is provided with saw teeth. The pitch of the spiral blade is 240-420mm, the spiral blade is arranged towards the feeding direction, and the inclination angle of the spiral blade is 10-20 degrees.

On the basis, heat conduction oil is filled in the inner screw rod and used for heating the inner screw rod.

On the basis, as an alternative embodiment of the invention, the spiral blades of the inner screw and the spiral grooves of the outer screw cylinder are not arranged in parallel, and the spiral blades gradually decrease from large to small from the feeding end to the discharging end, and the spiral grooves gradually become shallow from deep.

Compared with the prior art, the invention has the beneficial effects that:

(1) According to the normal-temperature regeneration device for waste rubber, provided by the invention, the inner screw and the outer screw cylinder are rotated in opposite directions, and the rubber material combination is subjected to sufficient rotation, extrusion and shearing, so that the purpose of desulfurization and regeneration is achieved, and the quality of reclaimed rubber is improved.

(2) According to the normal-temperature regeneration device for waste rubber, provided by the invention, rubber enters from the feed inlets at two ends, flows towards the middle circular cutters under the action of the spiral blades, a plurality of circular cutter holes are formed in the two circular cutters, and a plurality of shearing openings are formed in the cutter holes of the two circular cutters under the staggered rotation of the two circular cutters, so that the rubber is firstly decomposed into a plurality of fine rubber flows, and then is sheared and plasticated at a microscopic level under the action of the shearing openings, so that the aim of key breaking regeneration is achieved.

(3) According to the normal-temperature regeneration device for waste rubber, the discharge port is provided with the filter screen, qualified rubber can flow down through the filter screen, unqualified rubber is kept in the cavity of the disc cutter to be continuously sheared, broken in key and regenerated, and efficiency is improved.

(4) The normal-temperature recycling device for the waste rubber provided by the invention has the advantages of simple structure, convenience in operation, safety and reliability in use, stable performance indexes of the produced reclaimed rubber product, less Mooney rebound, high strength and low Mooney.

Drawings

FIG. 1 is a schematic diagram of a waste rubber normal temperature recycling device provided by the invention;

FIG. 2 is a schematic view of the structure of a disc cutter in a normal temperature recycling device for waste rubber;

FIG. 3 is a schematic diagram of the connection structure of an inner screw and a disc cutter in the normal temperature recycling device of waste rubber;

fig. 4 is a schematic structural view of a tray claw in the normal temperature recycling apparatus for waste rubber;

the reference numerals in fig. 1 and 2 are as follows: 1. an inner screw; 2. an outer screw barrel; 3. a helical blade; 4. a spiral groove; 5. a disc cutter; 6. a feed inlet; 7. a discharge port; 8. filtering and screening; 9. rotating and protruding; 10. a driving motor;

reference numerals in fig. 3 and 4 are as follows: 11. a disk claw; 11-1, connecting claws; 11-2, a joint; 11-3, an adapter.

Detailed Description

The invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1 and 2, a normal temperature recycling apparatus for waste rubber comprises: an inner screw 1, an outer screw cylinder 2, a disc cutter 5, a feed inlet 6 and a discharge outlet 7; the inner screw 1 is sleeved in the outer screw cylinder 2, the inner screw 1 is provided with a helical blade 3, the inner wall of the outer screw cylinder 2 is provided with a helical groove 4, and the helical blade 3 and the helical groove 4 are arranged in a staggered manner; the number of the inner screw rods 1 is left and right; the outer end of the inner screw 1 is connected with a driving motor 10, the inner end of the inner screw 1 is connected with a disc cutter 5, the disc surface of the disc cutter 5 is vertical to the inner screw 1, and the disc surfaces of the left and right disc cutters 5 are in surface contact at the middle part inside the outer screw cylinder 2; the feed inlet 6 is positioned at the upper part of the two ends of the inner screw 1, and the discharge outlet 7 is positioned below the middle part of the outer screw cylinder 2.

In addition, the axes of the inner screw 1 and the outer screw cylinder 2 are positioned on the same datum line, and the driving motor 10 drives the left and right inner screws 1 to rotate in opposite directions respectively. That is, when the inner screw at the left end rotates clockwise, the inner screw at the right end rotates counterclockwise.

The helical blade 3 of the inner screw 1 is not meshed with the helical groove 4 of the outer screw cylinder 2, and has a certain interval of 100-260mm.

The outer screw cylinder 2 is composed of a left part and a right part, and the outer screw cylinder 2 also rotates; the left and right outer barrels 2 are rotated in the opposite direction to the inner screw 1. That is, when the outer screw tube rotates clockwise, the inner screw inside the outer screw tube rotates counterclockwise.

The diameter of the disc cutter 5 is larger than the rotation diameter of the outer edge of the helical blade 3 of the inner screw 1, and the diameter of the disc cutter 5 is also larger than the rotation diameter of the helical groove 4 of the outer screw barrel 2; the middle part of the outer screw cylinder 2 forms a circular concave cavity, and the disc cutter 5 is positioned in the circular concave cavity.

The lower part of the concave cavity is connected with a discharge hole 7, a filter screen 8 is arranged above the discharge hole 7, the filter screen 8 is provided with round screen holes, and the diameter of the screen holes is 80-120 meshes.

The disc cutter 5 is provided with a plurality of cutter holes, and the cutter holes of the two contact surfaces of the disc cutter 5 are provided with cutting edges. The cutter hole is one of a circle, a triangle, a quadrangle and a polygon, and can also be a special-shaped hole, the cutter hole is gradually enlarged from the contact surface of the disc cutter 5 to the connecting end of the disc cutter 5, and the edge of the cutter hole of the contact surface of the disc cutter 5 is provided with a cutting edge.

The inner screw 1 is provided with a rotary protrusion 9 at the position of the feed inlet 6, the tail end of the rotary protrusion 9 is connected with the helical blade 3, and the direction of the starting end of the rotary protrusion 9 is opposite to the rotation direction of the inner screw 1.

Example 2

As shown in fig. 1, a normal temperature recycling apparatus for waste rubber comprises: an inner screw 1, an outer screw cylinder 2, a disc cutter 5, a feed inlet 6 and a discharge outlet 7; the inner screw 1 is sleeved in the outer screw cylinder 2, the inner screw 1 is provided with a helical blade 3, the inner wall of the outer screw cylinder 2 is provided with a helical groove 4, and the helical blade 3 and the helical groove 4 are arranged in a staggered manner; the number of the inner screw rods 1 is left and right; the outer end of the inner screw 1 is connected with a driving motor 10, the inner end of the inner screw 1 is connected with a disc cutter 5, the disc surface of the disc cutter 5 is vertical to the inner screw 1, and the disc surfaces of the left and right disc cutters 5 are in surface contact at the middle part inside the outer screw cylinder 2; the feed inlet 6 is positioned at the upper part of the two ends of the inner screw 1, and the discharge outlet 7 is positioned below the middle part of the outer screw cylinder 2.

The difference from example 1 is that: a disk claw 11 is arranged between the inner screw 1 and the disk cutter 5, and the disk claw 11 is used for connecting and fixing the inner screw 1 and the disk cutter 5; the disk claw 11 comprises a cross-shaped connecting claw 11-1, a plurality of joints 11-2, an adapter 11-3 and the like, wherein the adapter 11-3 consists of a rotating head and a rotating drum sleeved outside the rotating head.

The outer edge of the helical blade 3 is provided with saw teeth. The pitch of the helical blade 3 is 240-420mm, the helical blade 3 is arranged towards the feeding direction, and the inclination angle of the helical blade 3 is 10-20 degrees.

And heat conduction oil is filled in the inner screw rod and used for heating the inner screw rod.

The spiral blade of the inner screw rod and the spiral groove of the outer screw barrel are not arranged in parallel, and the spiral blade gradually becomes smaller from large to small from the feeding end to the discharging end, and the spiral groove gradually becomes shallower from deep.

The structure and function of other components are the same as those of embodiment 1.

According to the normal-temperature regeneration device for waste rubber, provided by the invention, through mutual reverse rotation of the inner screw and the outer screw cylinder, the rubber material combination is subjected to full rotation, extrusion and shearing, and the rubber material is subjected to shearing and plasticating at a microscopic level, so that the aim of broken bond regeneration is fulfilled. The produced reclaimed rubber product has stable performance indexes, high strength and low Mooney.

While the foregoing description illustrates and describes the preferred embodiments of the present invention, as noted above, 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 that various other combinations, modifications and environments are possible and may be made within the scope of the inventive concepts described herein, either by way of the foregoing teachings or by those of skill or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.

Claims

1. A normal temperature recycling apparatus for waste rubber, comprising: an inner screw (1), an outer screw cylinder (2), a disc cutter (5), a feed inlet (6) and a discharge outlet (7); the inner screw (1) is sleeved in the outer screw cylinder (2), the inner screw (1) is provided with a spiral blade (3), the inner wall of the outer screw cylinder (2) is provided with a spiral groove (4), and the spiral blade (3) and the spiral groove (4) are arranged in a staggered manner; the number of the inner screw rods (1) is left and right; the outer end of the inner screw (1) is connected with a driving motor (10), the inner end of the inner screw (1) is connected with the disc cutter (5), the disc surface of the disc cutter (5) is vertical to the inner screw (1), and the disc surfaces of the left disc cutter and the right disc cutter (5) are in surface contact at the middle part inside the outer screw cylinder (2); the charging hole (6) is positioned at the upper part of the two ends of the inner screw (1), and the discharging hole (7) is positioned below the middle part of the outer screw cylinder (2); the diameter of the disc cutter (5) is larger than the rotation diameter of the outer edge of the helical blade (3) of the inner screw, and the diameter of the disc cutter (5) is larger than the diameter of the helical groove (4) of the outer screw cylinder (2); the middle part of the outer screw cylinder (2) forms a circular concave cavity, and the disc cutter (5) is positioned in the circular concave cavity; the lower part of the concave cavity is connected with a discharge hole (7), a filter screen (8) is arranged above the discharge hole (7), the filter screen (8) is provided with round screen holes, and the diameter of each screen hole is 80-120 meshes; the cutter holes are formed in the disc cutters (5), the cutter holes gradually become larger from the contact surface of the disc cutters (5) to the connecting end of the disc cutters (5), and cutting edges are formed at the edges of the cutter holes of the contact surfaces of the two disc cutters (5); the outer edge of the spiral blade (3) is provided with saw teeth; the pitch of the spiral blade (3) is 240-420mm; the spiral blade is arranged towards the feeding direction, and the inclination angle of the spiral blade is 10-20 degrees.

2. The apparatus for regenerating a rubber waste at normal temperature according to claim 1, wherein: the axes of the inner screw (1) and the outer screw cylinder (2) are positioned on the same datum line, and the driving motor (10) drives the left and right inner screws (1) to rotate in opposite directions respectively.

3. The apparatus for regenerating a rubber waste at normal temperature according to claim 2, wherein: the helical blade (3) of the inner screw (1) is not meshed with the helical groove (4) of the outer screw cylinder (2) and is at a certain interval.

4. A waste rubber normal temperature recycling apparatus according to claim 3, characterized in that: the outer screw cylinder (2) is composed of a left part and a right part, and the outer screw cylinder (2) also rotates; the rotation direction of each section of outer screw cylinder (2) is opposite to that of the inner screw (1) inside.

5. The apparatus for regenerating a rubber waste at normal temperature according to claim 1, wherein: a disk claw (11) is arranged between the inner screw (1) and the disk knife (5) and is used for connecting and fixing the inner screw (1) and the disk knife (5); the disc claw (11) comprises a cross-shaped connecting claw (11-1), a joint (11-2) and an adapter piece (11-3), wherein the adapter piece (11-3) consists of a rotating head and a rotating drum sleeved outside the rotating head.

6. The apparatus for regenerating a rubber waste at normal temperature according to claim 1, wherein: the inner screw (1) is provided with a rotary protrusion (9) at the position of the feed inlet (6), the tail end of the rotary protrusion (9) is connected with the spiral blade (3), and the direction of the starting end of the rotary protrusion (9) is opposite to the rotation direction of the inner screw (1).