CN215242709U

CN215242709U - Device for continuously preparing low-Mooney rebound small particle reclaimed rubber

Info

Publication number: CN215242709U
Application number: CN202120529104.7U
Authority: CN
Inventors: 史金炜; 王访; 戈风行; 汪冯新; 王文才; 姚修祚
Original assignee: Suqian Lvjinren Rubber & Plastic Machinery Co ltd
Current assignee: Suqian Lvjinren Rubber & Plastic Machinery Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-12-21
Anticipated expiration: 2031-03-15

Abstract

The utility model discloses a continuous preparation low mooney bounce's tiny particle reclaimed rubber device, including the base, one side at base top is equipped with the motor, the opposite side at base top is equipped with the mount pad, the output of motor is equipped with reducing gear box and twin-screw extrusion mechanism respectively, the input and the twin-screw extrusion mechanism of reducing gear box interconnect, the inside of twin-screw extrusion mechanism is equipped with first extrusion conveying section, compression refining section, shearing refining section and stationary flow cooling conveying section respectively; the utility model realizes the continuous automation of reclaimed rubber refining production, realizes the whole operation process in a closed environment, protects the environment and saves labor; by adding the supercritical carbon dioxide fluid into the compression refining section, the Mooney viscosity of the desulfurized rubber powder is greatly reduced, and the cross-linked network destroyed by homogenization is homogenized.

Description

Device for continuously preparing low-Mooney rebound small particle reclaimed rubber

Technical Field

The utility model relates to a reclaimed rubber technical field specifically is a continuous preparation hangs down little granule reclaimed rubber device of mooney bounce-back.

Background

The reclaimed rubber is always a main mode for recycling the waste rubber in China, on one hand, the dependence on external rubber resources can be reduced, on the other hand, the problem of black pollution caused by waste tire manufacturing can be effectively solved, the yield of the waste rubber tires in China is about 3 hundred million in 2015, the weight of the waste rubber tires is over 1000 million tons, the preparation process of the reclaimed rubber is divided into a desulfurization stage and a refining stage of rubber powder, the desulfurization stage is a process of selectively disconnecting S-S bonds or C-S bonds from the rubber powder, and the prepared desulfurized rubber powder has certain use value, but the processing fluidity is too poor, and the mechanical properties, particularly the elongation at break, are not good, so that the desulfurized rubber powder needs to be further subjected to strong shearing and thinning to reduce the Mooney, the obtained reclaimed rubber is ensured to have good mechanical properties and processing fluidity, and the refining stage has very important significance for the preparation of the reclaimed rubber;

the refining extruder needs to perform strong shearing to finish the process of refining and Mooney reduction of the desulfurized rubber powder, and the prepared reclaimed rubber has good mechanical property and processing fluidity, but the refining extrusion process has many problems at present: if the extrusion temperature of the reclaimed rubber particles is over-high, about 100-120 ℃, the particle size is too large, heat is not easy to dissipate, and the particles are adhered and agglomerated; the particle reclaimed rubber with Mooney viscosity lower than 60 is difficult to prepare, the reclaimed rubber has the unique visco-elastic response of rubber materials, and tends to viscous response when the temperature is higher, so the particle reclaimed rubber extruded at the overhigh temperature is easy to adhere to the surface of subsequent cooling and conveying equipment, large-scale adhesion agglomeration also occurs among reclaimed rubber particles, both of the particle reclaimed rubber and the reclaimed rubber can influence the cooling, conveying and packaging of the particle reclaimed rubber and even block related equipment, and the reclaimed rubber belongs to a poor thermal conductor, during the feeding process of the desulfurized rubber powder, the heat dissipation effect of the particle reclaimed rubber can be further influenced by the overlarge particle size, the particles can be easily adhered together to cause the blockage of a feed port, the subsequent heating treatment takes a long time, the problems of particle reclaimed rubber adhesion agglomeration and the like are aggravated, and when the isolating agent is added, the powder of the isolating agent is easily adhered to the inner wall of the feed port in a large amount, and the inconvenience of the subsequent cleaning work is increased, the normal conveying function of the isolating agent is influenced, when a heat source in the device overflows, the isolating agent is not easy to remove, and the directly discharged heat source can cause mixing to the working environment, so that the air quality of the surrounding environment is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a continuous preparation low mooney bounce-back tiny particle reclaimed rubber device to solve the relevant problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the device comprises a base, wherein a motor is arranged on one side of the top of the base, a mounting seat is arranged on the other side of the top of the base, a reduction gearbox and a double-screw extrusion mechanism are respectively arranged at the output end of the motor, the input end of the reduction gearbox is mutually connected with the double-screw extrusion mechanism, a first extrusion conveying section, a compression refining section, a shearing refining section and a steady flow cooling conveying section are respectively arranged in the double-screw extrusion mechanism, a toothed disc is arranged on one side of the outer side of the double-screw extrusion mechanism, a rotary cutter is arranged on one side of the shearing refining section, a control console is arranged on one side of the top of the base, which is close to the motor, a diversion trench mutually communicated with the steady flow cooling conveying section is arranged at the top of the inside of the mounting seat, an electric gate valve is arranged on one side of the diversion trench, an air pump mutually communicated is arranged at the bottom of the diversion trench, and an air guide pipe is arranged at the output end of the air pump, a feeding groove which is communicated with each other is formed in one side of the top of the double-screw extrusion mechanism, the air guide pipe extends into the feeding groove, a carbon dioxide storage tank is arranged at the middle position of the top of the base, injection pumps which are communicated with each other are arranged at the bottom of the compression refining section, the injection pumps are communicated with the carbon dioxide storage tank, a preheating and scattering assembly is arranged at the middle position of the bottom of the inner part of the feeding groove, a quantitative feeding assembly is arranged at one side of the top of the double-screw extrusion mechanism, and a temperature control system is arranged at the middle position of the top of the outer side of the double-screw extrusion mechanism;

the preheating and scattering assembly is characterized in that a flow through groove is arranged at the middle position of the bottom inside the preheating and scattering assembly, a servo motor is arranged at the top of the flow through groove, a rotating rod is arranged at the output end of the servo motor, a driving gear is arranged at the bottom of the outer side of the rotating rod, a threaded column is sleeved at one side, close to the rotating rod, of the bottom inside the flow through groove, a driven gear meshed with the driving gear is arranged at the bottom of the outer side of the threaded column, a gear is arranged at the top of the outer side of the threaded column, inner threaded sleeves matched with each other are arranged on the outer side of the threaded column, rotating rings matched with each other are arranged on the outer side of the rotating rods, an annular electric heating wire is arranged on the outer side of each rotating ring, a pulley block is arranged on one side of each inner threaded sleeve, an annular sliding groove is arranged at the edge of the top of the feeding groove, sliding blocks are symmetrically arranged on the inner sides of the annular sliding grooves, and one side, close to each other, of the two groups of the sliding blocks, is provided with a desulfurization rubber powder inlet connected with each other, the four corners of the bottom of the inner side of the desulfurized rubber powder inlet are provided with connecting plates, the semi-arc-shaped guide seat is connected with the connecting plates, the edge of the bottom of the semi-arc-shaped guide seat is provided with an inner gear ring which is meshed with a gear, and the top of the semi-arc-shaped guide seat is provided with a stirring rod;

one side at ration pay-off subassembly top is equipped with the reinforced mechanism of separant, the top of the reinforced mechanism of separant is equipped with the feed inlet of mutual intercommunication, the intermediate position department of the positive one end of feed inlet is equipped with driving motor, driving motor's output extends to the inside of feed inlet and is equipped with the installation roller, the four corners department in the installation roller outside is equipped with brush board and indent respectively and decides the silo, one side of the reinforced mechanism bottom of separant is equipped with the nozzle of mutual intercommunication, the control cabinet passes through the wire and is connected with motor, aspiration pump, electronic push-pull valve, infusion pump, annular electric heating wire, servo motor and driving motor electricity respectively.

Preferably, the two sides of the top of the feed inlet are provided with internal thread fixing blocks, the inner sides of the internal thread fixing blocks are provided with threaded rods which are mutually matched, and one sides of the threaded rods, which are mutually close, are provided with arc-shaped clamping plates.

Preferably, the inner side of the rotating ring is provided with a hollow annular guide groove which is in sliding fit with the pulley block, the top and the bottom of the outer side of the rotating ring are connected with the internal thread sleeve, and the outer side of the flow through groove is uniformly provided with flow guide holes in rows.

Preferably, the top of feed chute one side is equipped with the gas vent, the top of feed chute opposite side is equipped with the air inlet, and air inlet and air duct intercommunication each other, the edge of the inside bottom of feed chute is equipped with annular feed opening, the top in the desulfurization rubber powder import outside is equipped with the expansion and connects the material mouth.

Preferably, the bottom of the steady flow cooling conveying section is provided with a through groove, the through groove is matched with the electric gate valve, the top of the steady flow cooling conveying section is provided with a communicating port, and the communicating port is matched with the nozzle.

Preferably, the two ends of the two sides in the feed inlet are provided with arc-shaped guide plates, and the brush plates are attached to the inner wall of the feed inlet.

Preferably, the double-screw extrusion mechanism is formed by connecting a co-rotating double-screw structure, the double-screw extrusion mechanism adopts a full-meshing double-screw extruder, a cylinder of the extruder is provided with a desulfurized rubber powder inlet, a carbon dioxide gas injection port, an isolating agent feeding port and a particle reclaimed rubber outlet, a jacket is arranged on the outer side of the cylinder of the double-screw extrusion mechanism, a cylinder water inlet and a cylinder water outlet are formed in the jacket, and a thermocouple is connected to the outer wall of the cylinder.

Preferably, the driving motor adopts a continuous and stable air pressure type powder spraying structure to be communicated and matched with the isolating agent feeding mechanism.

A device for continuously preparing low-viscosity small-particle reclaimed rubber is characterized in that desulfurized rubber powder with Mooney viscosity of 120-plus-200 and used for completing a desulfurization process enters a co-rotating twin-screw refining extruder through a feeding device, the temperature of a first extrusion conveying section is controlled to be 15-45 ℃, the temperature of a compression refining section is controlled to be 80-120 ℃, the pressure is 7.0-11.0MPa, the temperature of a shearing refining section is 15-25 ℃, the pressure is 2.0-5.0MPa, the temperature of a steady flow cooling conveying section is 8-12 ℃, carbon dioxide fluid with the mass ratio of 0.05-1.0% is added into the compression refining section of the extruder under the matching of a carbon dioxide storage tank and an injection pump to enable the compression refining section to be in a supercritical carbon dioxide state, 0.2-2% of isolating agent is added into the steady flow cooling conveying section of the extruder, the rotating speed of a screw is controlled to react at 200rpm of 100-plus for 1-4 minutes, extruding the mixture by an extruder head to obtain the small-particle reclaimed rubber with the Mooney viscosity of less than 60, the temperature of which is 30-60 ℃, the particle diameter of which is 5-30 mm.

The use method of the device for continuously preparing the low-Mooney rebound small particle reclaimed rubber comprises the following use steps:

step one; when the device is used, a control console is utilized to respectively start a motor, an air suction pump, an electric gate valve, an injection pump, an annular electric heating wire, a servo motor and a driving motor, firstly, the desulfurized rubber powder enters a full-meshing co-rotating twin-screw refining extruder through a feeding groove, the servo motor is started to drive a rotating rod to rotate in the period, a driving gear and a driven gear are driven to be meshed with each other along with the rotation of the rotating rod to force a threaded column and a gear to rotate simultaneously, the gear is driven to be meshed with an inner gear ring, the inner gear ring is forced to drive a semi-arc-shaped flow guide seat, a desulfurized rubber powder inlet and a stirring rod to rotate under the guiding sliding of a sliding block and the annular sliding groove, the entering desulfurized rubber powder is scattered and stirred by the rotation of the stirring rod, and the scattered rubber powder enters the feeding groove under the flow guide of the semi-arc-shaped flow guide seat to be preheated;

step two; when the scattered desulfurization rubber powder enters the feeding chute, the rotating rod rotates to drive the rotating ring to integrally rotate under the guidance of the rotating ring and the pulley block, so that the annular electric heating wire heats the inside of the through-flow chute, heated gas flows outwards, and the internal thread sleeve and the pulley block are driven to ascend along with the rotation of the threaded column, so that the annular electric heating wire can reciprocate and rotate to heat, and the desulfurization rubber powder falling in the feeding chute is preheated;

step three; when the rubber powder that gets into first extrusion transport section along with preheating, pass first extrusion transport section after the temperature control system temperature control in proper order, the compression refining section, it forms the reclaimed rubber to cut the section of refining and stationary flow cooling transport section, during through stationary flow cooling transport section, it is rotatory wholly to decide the silo with the indent through driving motor drive installation roller, utilize the indent to decide the silo and carry out the ration to the talcum powder of whereabouts and receive, and utilize the laminating contact of brush board and feed inlet inner wall, prevent the talcum powder adhesion at the feed inlet wall, can send into the nozzle under the cooperation of the reinforced mechanism of isolating agent with the talcum powder is orderly and carry out vapour-pressure type powder spraying work.

Step four; when the device is too large to be discharged easily due to accumulation of heat sources in the double-screw extrusion mechanism, the electric gate valve can be started to open the steady-flow cooling conveying section for ventilation, the air pump is communicated with the flow guide groove in a flow guide mode, gas in the steady-flow cooling conveying section and the double-screw extrusion mechanism is pumped out, the gas is guided into the feeding groove from the gas guide pipe, waste heat utilization is formed, excessive heat sources are covered on the desulfurized rubber powder which falls again for heating, and continuous low-Mooney regenerated rubber production work is carried out.

Compared with the prior art, the utility model provides a prepare little granule reclaimed rubber device of low mooney rebound in succession possesses following beneficial effect:

1. the utility model realizes the continuous automation of reclaimed rubber refining production, realizes the whole operation process under the airtight environment, protects the environment and saves the labor in the refining stage of the reclaimed rubber production process; by adding the supercritical carbon dioxide fluid into the compression refining section, the Mooney viscosity of the desulfurized rubber powder is greatly reduced, and the cross-linked network destroyed by homogenization is homogenized, in addition, the torque of an extruder is reduced, and the equipment manufacturing difficulty and the use energy consumption are greatly reduced; the network of the regenerated rubber is further homogenized under the action of the shearing thinning section, so that the product performance is ensured, and the Mooney viscosity rebound in the later storage process is reduced; in addition, through the specially designed screw size, the configuration and the combination of the thread elements, the prepared reclaimed rubber has low Mooney, low extrusion temperature, small particles, easy heat dissipation, no adhesion and easy packaging and transportation, and finally realizes the preparation of reclaimed rubber with low Mooney viscosity, small particles and small Mooney viscosity rebound in the storage process.

2. The utility model discloses utilize and preheat mutually supporting of breaking up subassembly, the desulfurization rubber powder that makes the transport stirs when the feeding and breaks up, prevent inside caking, it blocks up to lead to the production of feed department, reciprocating lift and rotatory heating structure at annular electric heating wire are full of the heating source to the feed chute simultaneously, the desulfurization rubber powder to the whereabouts preheats, improve subsequent temperature controllable effect, strengthen the production efficiency of reclaimed rubber, and utilize and the control of air pump absorbs the heat source of excess in the stationary flow cooling transport section, and from the leading-in feed chute of air duct in, form waste heat utilization, further strengthen the functional of device continuous type processing and the preheating frequency of desulfurization rubber powder, the practical value of improvement device.

3. The utility model discloses a mutually supporting of ration pay-off subassembly, can carry out intermittent type formula to the separant of whereabouts and receive and unloading system, and the rotation through the installation roller drives brush board intermittent type formula and wipes the brush to the inner wall of feed inlet, prevents powder adhesion feed inlet inner wall for powder spray device's addition makes the granule reclaimed rubber not conglomeration, changes the heat dissipation, the utility model discloses a reclaimed rubber's production provides an energy-conserving, environmental protection, serialization device, and the reclaimed rubber steady quality and the mooney rebound that the preparation obtained are little.

Drawings

Fig. 1 is a front sectional view of the present invention;

FIG. 2 is an enlarged view of the point A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the point B of FIG. 1 according to the present invention;

FIG. 4 is a perspective view of the devulcanized rubber powder inlet of the present invention;

FIG. 5 is a perspective view of the semi-arc-shaped deflector base of the present invention;

fig. 6 is a top cross-sectional view of the swivel of the present invention;

fig. 7 is a top cross-sectional view of the feed inlet of the present invention.

In the figure: 1. a motor; 2. a reduction gearbox; 3. a feed chute; 4. a double screw extrusion mechanism; 5. an air duct; 6. a temperature control system; 7. a toothed disc; 8. rotating the cutter; 9. a steady flow cooling delivery segment; 10. a mounting seat; 11. a diversion trench; 12. an air pump; 13. an electric gate valve; 14. shearing and thinning the sections; 15. compressing the refining section; 16. an injection pump; 17. a carbon dioxide storage tank; 18. a first extrusion conveying section; 19. a console; 20. a base; 21. a flow through groove; 211. an annular electric heating wire; 212. rotating the ring; 213. a driving gear; 214. a rotating rod; 215. a driven gear; 216. a threaded post; 217. an internally threaded sleeve; 218. a servo motor; 219. a semi-arc shaped flow guide seat; 2110. a desulfurized rubber powder inlet; 2111. an annular chute; 2112. a slider; 2113. a stirring rod; 2114. a connecting plate; 2115. a pulley block; 2116. a gear; 2117. an inner gear ring; 22. a release agent feeding mechanism; 221. brushing the board; 222. mounting a roller; 223. an inward concave fixed trough; 224. a feed inlet; 225. a nozzle; 226. the motor is driven.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a device for continuously preparing low-Mooney rebounding small particle reclaimed rubber comprises a base 20, wherein a motor 1 is arranged on one side of the top of the base 20, a mounting seat 10 is arranged on the other side of the top of the base 20, a reduction gearbox 2 and a double-screw extrusion mechanism 4 are respectively arranged at the output end of the motor 1, the input end of the reduction gearbox 2 is mutually connected with the double-screw extrusion mechanism 4, a first extrusion conveying section 18, a compression refining section 15, a shearing refining section 14 and a steady flow cooling conveying section 9 are respectively arranged in the double-screw extrusion mechanism 4, a toothed disc 7 is arranged on one side of the outer side of the double-screw extrusion mechanism 4, a rotary cutter 8 is arranged on one side of the shearing refining section 14, a control console 19 is arranged on one side of the top of the base 20 close to the motor 1, a flow guide groove 11 mutually communicated with the steady flow cooling conveying section 9 is arranged on the top of the inside of the mounting seat 10, an electric gate valve 13 is arranged on one side of the flow guide groove 11, and an air extracting pump 12 mutually communicated is arranged at the bottom of the flow guide groove 11, the output end of the air pump 12 is provided with air guide pipes 5 which are communicated with each other, one side of the top of the double-screw extrusion mechanism 4 is provided with a feeding groove 3 which is communicated with each other, the air guide pipes 5 extend into the feeding groove 3, the middle position of the top of the base 20 is provided with a carbon dioxide storage tank 17, the bottom of the compression refining section 15 is provided with an injection pump 16 which is communicated with each other, the injection pump 16 is communicated with the carbon dioxide storage tank 17, the middle position of the bottom inside the feeding groove 3 is provided with a preheating scattering component, one side of the top of the double-screw extrusion mechanism 4 is provided with a quantitative feeding component, and the middle position of the top outside the double-screw extrusion mechanism 4 is provided with a temperature control system 6;

a flow through groove 21 is arranged at the middle position of the bottom inside the preheating and scattering assembly, a servo motor 218 is arranged at the top of the flow through groove 21, a rotating rod 214 is arranged at the output end of the servo motor 218, a driving gear 213 is arranged at the bottom outside the rotating rod 214, a threaded column 216 is sleeved at one side, close to the rotating rod 214, of the bottom inside the flow through groove 21, a driven gear 215 meshed with the driving gear 213 is arranged at the bottom outside the threaded column 216, a gear 2116 is arranged at the top outside the threaded column 216, an internally threaded sleeve 217 matched with each other is arranged at the outside of the threaded column 216, a rotating ring 212 matched with each other is arranged at the outside of the rotating rod 214, an annular electric heating wire 211 is arranged at the outside of the rotating ring 212, a pulley block 2115 is arranged at one side of the internally threaded sleeve 217, an annular chute 2111 is arranged at the edge of the top of a feed chute 3, sliders 2112 are symmetrically arranged at the inner side of the annular chute 2111, and a desulfurization rubber powder inlet 2110 connected with each other is arranged at one side, of the two sets of the sliders 2112, connecting plates 2114 are arranged at four corners of the bottom of the inner side of the desulfurized rubber powder inlet 2110, the semi-arc guide seat 219 is connected with the connecting plates 2114, an inner gear ring 2117 meshed with the gear 2116 is arranged at the edge of the bottom of the semi-arc guide seat 219, and a stirring rod 2113 is arranged at the top of the semi-arc guide seat 219;

the device comprises a quantitative feeding assembly, an isolating agent feeding mechanism 22, a feeding hole 224, a driving motor 226, a mounting roller 222, a brush plate 221 and a concave material fixing groove 223, wherein the isolating agent feeding mechanism 22 is arranged on one side of the top of the quantitative feeding assembly, the feeding hole 224 is communicated with the top of the isolating agent feeding mechanism 22, the driving motor 226 is arranged in the middle of one end of the front face of the feeding hole 224, the output end of the driving motor 226 extends into the feeding hole 224 and is provided with the mounting roller 222, four corners of the outer side of the mounting roller 222 are respectively provided with the brush plate 221 and the concave material fixing groove 223, a nozzle 225 is communicated with the isolating agent feeding mechanism 22, and a control console 19 is respectively electrically connected with a motor 1, an air suction pump 12, an electric gate valve 13, an injection pump 16, an annular electric heating wire 211, a servo motor 218 and the driving motor 226 through wires.

As a preferable embodiment of the present embodiment: the both sides at feed inlet 224 top are equipped with the internal thread fixed block, and the inboard of internal thread fixed block is equipped with the threaded rod of mutual adaptation, and one side that the threaded rod is close to each other is equipped with the arc grip block, and the bagging-off or the box centre gripping of being convenient for to the powder is fixed, improves the stability of material whereabouts.

As a preferable embodiment of the present embodiment: the inner side of the rotating ring 212 is provided with a hollow annular guide groove which is in sliding fit with the pulley block 2115, the moving fixed point of the device is increased, the top and the bottom of the outer side of the rotating ring 212 are connected with the internal thread sleeve 217, and the outer side of the flow through groove 21 is uniformly provided with flow guide holes, so that formed hot air can be conveniently discharged.

As a preferable embodiment of the present embodiment: the top of 3 one sides of feed chute is equipped with the gas vent, and the top of 3 opposite sides of feed chute is equipped with the air inlet, and air inlet and 5 mutual intercommunications of air duct, and the edge of the inside bottom of feed chute 3 is equipped with annular feed opening, is convenient for carry the material, and the top in the desulfurization rubber powder import 2110 outside is equipped with the expansion and connects the material mouth, increases the feeding range of material.

As a preferable embodiment of the present embodiment: the inside bottom of stationary flow cooling conveying section 9 is equipped with logical groove, and leads to groove and the mutual adaptation of electronic push-pull valve 13, and the inside top of stationary flow cooling conveying section 9 is equipped with the intercommunication mouth, and the mutual adaptation of intercommunication mouth and nozzle 225, and the parts of being convenient for communicate the cooperation each other.

As a preferable embodiment of the present embodiment: arc-shaped guide plates are arranged at two ends of two sides inside the feed port 224, and the brush plates 221 are attached to the inner wall of the feed port 224, so that the inner wall of the component can be automatically brushed conveniently, and the convenience of subsequent cleaning work is improved.

As a preferable embodiment of the present embodiment: the double-screw extrusion mechanism 4 is formed by connecting a homodromous double-screw structure, the double-screw extrusion mechanism 4 adopts a full-meshing double-screw extruder, a devulcanized rubber powder inlet is formed in a machine barrel of the extruder, a carbon dioxide gas injection port, an isolating agent feeding port and a particle reclaimed rubber outlet are formed in the machine barrel of the extruder, a jacket is arranged on the outer side of the machine barrel of the double-screw extrusion mechanism 4, a machine barrel water inlet, a water outlet and a thermocouple are formed in the outer wall of the machine barrel, and the device and each part are convenient to communicate and match with each other.

As a preferable embodiment of the present embodiment: the driving motor 226 adopts a continuous and stable pneumatic powder spraying structure to be communicated and matched with the separant feeding mechanism 22, so that the powder can be sprayed and mixed conveniently.

A device for continuously preparing low-viscosity small-particle reclaimed rubber is characterized in that desulfurized rubber powder with Mooney viscosity of 120-200-class to complete a desulfurization process enters a co-rotating twin-screw refining extruder through a feeding device, the temperature of a first extrusion conveying section 18 is controlled to be 15-45 ℃, the temperature of a compression refining section 15 is controlled to be 80-120 ℃, the pressure is 7.0-11.0Mpa, the temperature of a shear refining section 14 is 15-25 ℃, the pressure is 2.0-5.0Mpa, the temperature of a steady flow cooling conveying section 9 is 8-12 ℃, carbon dioxide fluid with the mass ratio of 0.05-1.0% is added into the compression refining section 15 of the extruder under the matching of a carbon dioxide storage tank 17 and an injection pump 16 to enable the compression refining section to be in a supercritical carbon dioxide state, 0.2-2% of isolating agent is added into the steady flow cooling conveying section 9 of the extruder, the rotating speed of a steady flow screw is controlled to react for 1-4 minutes at 200rpm of 100-class, extruding the mixture by an extruder head to obtain the small-particle reclaimed rubber with the Mooney viscosity of less than 60, the temperature of which is 30-60 ℃, the particle diameter of which is 5-30 mm.

In the embodiment 1, the desulfurized rubber powder with Mooney viscosity of 180 enters the full-meshing co-rotating twin-screw extrusion mechanism 4 through the feeding device, the temperature of the first extrusion conveying section 18 is controlled to be 25 ℃, the screw element is a combination of a conveying element and a meshing element, and the depth of a screw groove is 20 mm; controlling the temperature of a compression refining section 15 to be 100 ℃, the pressure to be 8.0Mpa, a threaded element to be an engagement block, the depth of a screw groove to be 10mm, the temperature of a shearing refining section 14 to be 15 ℃, the pressure to be 2.0Mpa, the temperature of a steady flow cooling conveying section 9 to be 10 ℃, the threaded element to be a combination of a conveying original piece and a tooth-shaped disc 7, the depth of the screw groove to be 5mm, and the tail end to be the tooth-shaped disc 7, adding 0.05% of carbon dioxide fluid in mass proportion into the compression refining section 15 of an extruder to enable the screw groove to be in a supercritical carbon dioxide state, adding 1.5% of talcum powder isolating agent into the steady flow cooling conveying section 9 of the extruder, controlling the rotating speed of a screw to be 150rpm, reacting for 2 minutes, and extruding and preparing small-particle reclaimed rubber with the temperature of 40 ℃ and the particle diameter of 10mm by using an extruder head;

the properties of the reclaimed rubber are as follows: mooney viscosity = 40; according to a vulcanization formula of GB/T13460-: the tensile strength =15.3Mpa, the elongation at break =520%, the mooney viscosity rebounds 3 after the regenerated rubber is parked for 10 days, and the mooney viscosity rebounds 7 after the regenerated rubber is parked for one month.

Example 2, the desulfurized rubber powder with Mooney viscosity of 200 enters a full-mesh co-rotating twin-screw extrusion mechanism 4 through a feeding device, the temperature of a first extrusion conveying section 18 is controlled to be 20 ℃, a screw element is a conveying element, the depth of a screw groove is 15mm, the temperature of a compression refining section 15 is controlled to be 120 ℃, the pressure is 10.0MPa, the screw element is a meshing block, the depth of the screw groove is 8mm, the temperature of a shearing refining section 14 is 25 ℃, the pressure is 3.0MPa, the temperature of a steady flow cooling conveying section 9 is 8 ℃, the screw element is a combination of a conveying element and a toothed disc 7, the depth of the screw groove is 7mm, the tail end is the toothed disc 7, carbon dioxide fluid with the mass ratio of 1.5% is added into the compression refining section 15 of the extruder to enable the extrusion to be in a supercritical carbon dioxide state, and 0.5% of calcium powder and carbon black are used as isolating agents and are added into the steady flow cooling conveying section 9 of the extruder, controlling the rotation speed of the screw to react for 2.5 minutes at 100rpm, and extruding by an extruder head to prepare small-particle reclaimed rubber with the temperature of 35 ℃ and the particle diameter of 15 mm; the properties of the reclaimed rubber are as follows: mooney viscosity = 45; according to a vulcanization formula of GB/T13460-: the tensile strength =15.8Mpa, the elongation at break =550%, the mooney viscosity rebounds 2 after the regenerated rubber is parked for 10 days, and the mooney viscosity rebounds 6 after one mooney is parked; the properties of the reclaimed rubber are as follows: mooney viscosity = 45; according to a vulcanization formula of GB/T13460-: the tensile strength =15.8Mpa, the elongation at break =550%, the mooney viscosity rebounds 2 after the reclaimed rubber is parked for 10 days, and the mooney viscosity rebounds 6 after the reclaimed rubber is parked for one mooney.

step one; when the device is used, the control console 19 is used for respectively starting the motor 1, the air suction pump 12, the electric gate valve 13, the injection pump 16, the annular electric heating wire 211, the servo motor 218 and the driving motor 226, firstly, the desulfurized rubber powder enters the full-meshed co-rotating twin-screw refining extruder through the feeding chute 3, during the period, the starting of the servo motor 218 is used for driving the rotating rod 214 to rotate, the driving gear 213 and the driven gear 215 are driven to be mutually meshed along with the rotation of the rotating rod 214 to force the threaded column 216 and the gear 2116 to rotate simultaneously, the rotation of the gear 2116 is mutually meshed with the inner gear 2117 to force the inner gear 2117 to drive the semi-arc-shaped guide seat 219, the desulfurized rubber powder inlet 2110 and the stirring rod 2113 to rotate under the guiding sliding of the sliding block 2112 and the annular sliding chute 2111, the entering desulfurized rubber powder is scattered and stirred by the rotation of the stirring rod 2113, and the scattered rubber powder enters the feed chute 3 under the flow guidance of the semi-arc-shaped flow guide seat 219 for preheating;

step two; when the scattered desulfurized rubber powder enters the feeding chute 3, the rotating rod 214 rotates to drive the rotating ring 212 to integrally rotate under the guidance of the pulley block 2115, so that the annular electric heating wire 211 heats the through-flow chute 21 and the heated gas flows outwards, and simultaneously the threaded column 216 rotates to drive the internal threaded sleeve 217 and the pulley block 2115 to ascend, so that the annular electric heating wire 211 can perform reciprocating lifting and rotary heating work, and the desulfurized rubber powder falling in the feeding chute 3 is enabled to be preheated;

step three; when preheated rubber powder enters the first extrusion conveying section 18, the preheated rubber powder sequentially passes through the first extrusion conveying section 18, the compression refining section 15, the shearing refining section 14 and the steady-flow cooling conveying section 9 after temperature control of the temperature control system 6 to form regenerated rubber, during the process, when the rubber powder passes through the steady-flow cooling conveying section 9, the mounting roller 222 and the concave fixed trough 223 are driven by the driving motor 226 to integrally rotate, the concave fixed trough 223 is used for quantitatively receiving falling talcum powder, the brush plate 221 is in contact with the inner wall of the feed port 224 in an attaching mode, the talcum powder is prevented from being adhered to the wall surface of the feed port 224, and the talcum powder can be sequentially fed into the nozzle 225 under the cooperation of the isolating agent feeding mechanism 22 to perform pneumatic powder spraying work;

step four; when the device is too large to be discharged easily due to accumulation of heat sources in the double-screw extrusion mechanism 4, the electric gate valve 13 can be started to open the steady-flow cooling conveying section 9 for ventilation, the air in the steady-flow cooling conveying section 9 and the double-screw extrusion mechanism 4 is pumped out by utilizing the flow guide communication of the air suction pump 12 and the flow guide groove 11, the air is guided into the feeding groove 3 from the air guide pipe 5 to form waste heat utilization, the overflowed heat sources are covered on the desulfurized rubber powder which falls again for heating, and continuous low-Mooney regenerated rubber production work is carried out.

In summary, the following steps: the device mainly comprises a full-meshed co-rotating double-screw refining extruder, a carbon dioxide gas injection device and a continuous and stable air pressure type powder spraying device, the process of greatly reducing and refining the Mooney viscosity of the desulfurized rubber powder is completed by desulfurized rubber powder with Mooney viscosity of 120-200 in a desulfurization process under the action of pressure, shearing, mixing and temperature of the co-rotating double-screw refining extruder, and small-particle reclaimed rubber with the temperature of 30-60 ℃ and the Mooney viscosity of 5-30 mm in particle diameter of less than 60 is obtained by extrusion preparation through screw size, screw element combination, the powder spraying device and process control, so that the production efficiency of the device for the low Mooney reclaimed rubber and the practical value of the device are greatly improved.

It should be finally noted that the above only serves to illustrate the technical solution of the present invention, and not to limit the scope of the present invention, and that simple modifications or equivalent replacements performed by those skilled in the art to the technical solution of the present invention do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A device for continuously preparing low-Mooney rebound small particle reclaimed rubber comprises a base (20), and is characterized in that: a motor (1) is arranged on one side of the top of the base (20), a mounting seat (10) is arranged on the other side of the top of the base (20), a reduction gearbox (2) and a double-screw extrusion mechanism (4) are respectively arranged at the output end of the motor (1), the input end of the reduction gearbox (2) is connected with the double-screw extrusion mechanism (4), a first extrusion conveying section (18), a compression refining section (15), a shearing refining section (14) and a steady flow cooling conveying section (9) are respectively arranged in the double-screw extrusion mechanism (4), a toothed disc (7) is arranged on one side of the outer side of the double-screw extrusion mechanism (4), a rotary cutter (8) is arranged on one side of the shearing refining section (14), a control console (19) is arranged on one side of the top of the base (20) close to the motor (1), and a flow guide groove (11) communicated with the steady flow cooling conveying section (9) is arranged on the top of the inside of the mounting seat (10), one side of the diversion trench (11) is provided with an electric gate valve (13), the bottom of the diversion trench (11) is provided with an air pump (12) which are communicated with each other, the output end of the air pump (12) is provided with air ducts (5) which are communicated with each other, one side of the top of the double-screw extrusion mechanism (4) is provided with a feeding groove (3) which is communicated with each other, the gas guide pipe (5) extends into the feeding groove (3), a carbon dioxide storage tank (17) is arranged in the middle of the top of the base (20), the bottom of the compression refining section (15) is provided with an injection pump (16) which is communicated with each other, the injection pump (16) is communicated with the carbon dioxide storage tank (17), a preheating and scattering assembly is arranged in the middle of the bottom inside the feed chute (3), a quantitative feeding component is arranged on one side of the top of the double-screw extrusion mechanism (4), and a temperature control system (6) is arranged in the middle of the top of the outer side of the double-screw extrusion mechanism (4);

the middle position department of the inside bottom of subassembly is broken up in preheating is equipped with logical chute (21), the top that leads to chute (21) is equipped with servo motor (218), the output of servo motor (218) is equipped with bull stick (214), the bottom in bull stick (214) outside is equipped with driving gear (213), one side cover that the inside bottom of logical chute (21) is close to bull stick (214) is equipped with screw thread post (216), the bottom in the screw thread post (216) outside is equipped with driven gear (215) with driving gear (213) intermeshing, the top in the screw thread post (216) outside is equipped with gear (2116), the outside of screw thread post (216) is equipped with the internal thread sleeve pipe (217) of mutual adaptation, the outside of bull stick (214) is equipped with swivel (212) of mutually supporting, the outside of swivel (212) is equipped with annular electric heating wire (211), one side of internal thread sleeve pipe (217) is equipped with assembly pulley (2115), an annular chute (2111) is arranged at the edge of the top of the feed chute (3), sliders (2112) are symmetrically arranged on the inner side of the annular chute (2111), mutually connected desulfurized rubber powder inlets (2110) are arranged on one sides of two groups of sliders (2112) close to each other, connecting plates (2114) are arranged at four corners of the bottom of the inner side of each desulfurized rubber powder inlet (2110), a semi-arc-shaped guide seat (219) is mutually connected with the connecting plates (2114), an inner gear ring (2117) meshed with a gear (2116) is arranged at the edge of the bottom of the semi-arc-shaped guide seat (219), and a stirring rod (2113) is arranged at the top of the semi-arc-shaped guide seat (219);

one side at ration pay-off subassembly top is equipped with isolating agent feeding mechanism (22), the top of isolating agent feeding mechanism (22) is equipped with feed inlet (224) that communicates each other, the intermediate position department of the positive one end of feed inlet (224) is equipped with driving motor (226), the output of driving motor (226) extends to the inside of feed inlet (224) and is equipped with installation roller (222), the four corners department in installation roller (222) outside is equipped with brush board (221) and indent surely silo (223) respectively, one side of isolating agent feeding mechanism (22) bottom is equipped with nozzle (225) that communicate each other, control cabinet (19) are connected with motor (1), aspiration pump (12), electronic push-pull valve (13), injection pump (16), annular electric heating wire (211), servo motor (218) and driving motor (226) electricity respectively through the wire.

2. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the two sides of the top of the feed port (224) are provided with internal thread fixing blocks, the inner sides of the internal thread fixing blocks are provided with threaded rods which are mutually matched, and one sides of the threaded rods, which are mutually close, are provided with arc-shaped clamping plates.

3. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the inner side of the rotating ring (212) is provided with a hollow annular guide groove, the hollow annular guide groove is in sliding fit with the pulley block (2115), the top and the bottom of the outer side of the rotating ring (212) are connected with the internal thread sleeve (217), and the outer side of the flow through groove (21) is uniformly provided with flow guide holes in rows.

4. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the top of feed chute (3) one side is equipped with the gas vent, the top of feed chute (3) opposite side is equipped with the air inlet, and air inlet and air duct (5) intercommunication each other, the edge of the inside bottom of feed chute (3) is equipped with annular feed opening, the top in the desulfurization rubber powder import (2110) outside is equipped with the expansion and connects the material mouth.

5. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the bottom of the interior of the steady flow cooling conveying section (9) is provided with a through groove, the through groove is matched with the electric gate valve (13), the top of the interior of the steady flow cooling conveying section (9) is provided with a communicating opening, and the communicating opening is matched with the nozzle (225).

6. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the both ends of the inside both sides of feed inlet (224) are equipped with arc guide plate, the inner wall of brush board (221) and feed inlet (224) is laminated each other.

7. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the double-screw extrusion mechanism (4) is formed by connecting a co-rotating double-screw structure, the double-screw extrusion mechanism (4) adopts a full-meshing double-screw extruder, a cylinder of the extruder is provided with a desulfurized rubber powder inlet, a carbon dioxide gas injection port, an isolating agent feeding port and a particle regenerated rubber outlet, the outer side of the cylinder of the double-screw extrusion mechanism (4) is provided with a jacket, the jacket is provided with a cylinder water inlet and a water outlet, and the outer wall of the cylinder is connected with a thermocouple.

8. The apparatus for continuously preparing low-mooney rebound small particle reclaimed rubber according to claim 1, wherein: the driving motor (226) adopts a continuous and stable air pressure type powder spraying structure to be communicated and matched with the isolating agent feeding mechanism (22).