An air-sealed water-cooled rotary granulator

Abstract

The invention discloses an air-sealed water-cooled rotary granulator, comprising a frame assembly, a granulating assembly, a granulating assembly, a feeding barrel, a screen plate supporting ring, a discharging motor, a pressing motor, a granulating motor, a cooling water trough and an air-sealed unit. The invention provides a granulating wheel and a pressing wheel for coaxial and unidirectional rotation, and the rotation speeds can be independently controlled by the granulating motor and the pressing motor, thereby increasing the applicable range of the granulator to different materials and greatly improving the granulating efficiency. The granulating assembly is added to enable the granulator to have a granulating function, which can better meet the material particle size requirements of customers. The main shaft and the hollow shaft are driven by a main gear and a driven gear, and the discharging is driven by a small gear and a rotary bearing, so that the transmission is more accurate and stable, and the granulation consistency and granulation yield are improved. The cooling water trough is added to enable the granulator to be applicable to some heat-sensitive materials, thereby improving the practicability of the granulator. The air-sealed unit is added, and a three-way sealed air path is provided, which can reduce material contamination between different batches.

Description

Technical Field

[0001] The invention relates to the technical field of granulators, in particular to an air-sealed water-cooled rotary granulator. Background Art

[0002] Granulators primarily consist of feeding, mixing, granulating, and transmission systems and are widely used in the pharmaceutical, chemical, and food industries. Rotary granulators utilize a granulating wheel to compress powdered soft materials into granules. Existing rotary granulators sometimes have the granulating wheel and pressing wheel rotating coaxially and in the same direction, resulting in poor granulation performance; others rotate in opposite directions but lack independent speed control, limiting the range of powders suitable for granulation. Some lack granulation functions, requiring additional granulation equipment for viscous materials like traditional Chinese medicines. Some are belt-driven, resulting in imprecise transmission and poor granulation consistency. In summary, rotary granulators require further optimization and improvement. Summary of the Invention

[0003] In order to solve the problems in the above-mentioned background technology that the existing rotary granulator has poor granulation effect due to the granulation wheel and the pressure wheel rotating in the same direction, and the rotation speed cannot be independently controlled when rotating in different directions, resulting in a narrow range of powders that can be used for granulation, no granulation function, and other granulation equipment is required for granulation, and belt transmission causes poor granulation consistency, the present invention provides an air-sealed water-cooled rotary granulator.

[0004] To achieve the above object, an airtight water-cooled rotary granulator is provided, which is characterized by comprising a frame assembly, a granulating assembly, a granulating assembly, a feeding cylinder, a screen support ring, a discharging motor, a pressing motor, and a granulating motor;

[0005] The granulation assembly includes a gear box, a main shaft, a main gear, a driven gear, a hollow shaft, a granulation wheel, a pressure wheel, a central shaft, a pinion gear, and a slewing bearing;

[0006] The gear box is arranged on the frame assembly, the main shaft is arranged on the right side of the gear box and is connected to the granulating motor, the main gear is arranged in the gear box and is fixedly connected to the main shaft, the hollow shaft is arranged on the left side of the gear box, the driven gear is arranged in the gear box and is fixedly connected to the hollow shaft, meshing with the main gear for transmission, and the granulating wheel is fixedly connected to the upper end of the hollow shaft;

[0007] The central shaft sleeve is arranged in the hollow shaft and is connected to the output shaft of the pressing motor. The pelletizing wheel is fixedly connected to the upper end of the central shaft and is arranged above the pelletizing wheel.

[0008] The pinion is connected to the output shaft of the discharge motor, is located at the left rear of the hollow shaft, and is meshed with the slewing bearing for transmission. The slewing support sleeve is located outside the hollow shaft and below the pelletizing wheel. The upper end surface of the outer ring of the slewing support is fixedly connected to the discharge panel, and the inner ring is fixedly connected to the upper panel of the gear box.

[0009] The feed cylinder is arranged on the mesh plate support ring, the mesh plate support ring is fixedly connected to the gear box, the granulating wheel is arranged in the mesh plate support ring, and a granulating bottom plate is provided below and fixedly connected to the mesh plate support ring. The space formed by the granulating wheel, the granulating bottom plate and the mesh plate support ring is the granulating wheel working space;

[0010] The granulation assembly is fixed to the left side of the frame assembly through a support base, and is used to impact and shear the cylindrical particles of different lengths coming out of the working space of the granulation wheel. By adjusting the speed of the granulation motor, the particles required by the customer can be obtained.

[0011] The pressing motor and granulating motor are both variable frequency drive motors;

[0012] During operation, the pressing motor drives the pressing wheel located at the upper end of the central shaft to rotate counterclockwise, forcing the material to move downward and transporting the material to the working space of the granulating wheel. The granulating motor drives the driven gear through the main gear, thereby driving the granulating wheel located at the upper end of the hollow shaft to rotate clockwise; the material is extruded and granulated outward under the joint action of the pressing wheel and the granulating wheel, and the discharging motor drives the discharge panel fixed on the rotary bearing to rotate clockwise through the small gear, so that the extruded particles are transported to the granulating assembly through the discharge panel for granulation.

[0013] As a further improvement of the present technology, the gearbox is welded together by an upper panel, a right side panel, a lower panel, a bearing seat 1, a bearing seat 2, a left side panel, and a bearing seat 3. The upper end of the bearing seat 3 and the upper end of the bearing seat 1 are respectively inserted on the left and right sides of the lower panel, and the lower end of the bearing seat 2 is inserted on the upper panel. Bearing 5 is provided in bearing seat 1, bearing 4 is provided in bearing seat 2, and bearing 3 is provided in bearing seat 3.

[0014] As a further improvement of the present technology, the main shaft is fixed inside the gearbox through bearings five and six, and the bearing six is ​​arranged in the upper panel;

[0015] The upper end of the central shaft is fixed inside the hollow shaft through bearing 1, and the lower end is fixed inside the hollow shaft through bearing 2 and a locking nut;

[0016] The outside of the hollow shaft is fixed in the gear box through bearing three and bearing four.

[0017] As a further improvement of the present technology, the slewing bearing sleeve is arranged on the outer side of the second bearing seat, the lower end surface of the inner ring is fixedly connected to the upper panel, and the upper end surface of the outer ring is fixedly connected to the blanking panel.

[0018] As a further improvement of the present technology, a material tray weldment is provided on the upper panel. The shape of the material tray weldment is an annular groove structure. The outer plate is higher than the inner plate. The upper end of the outer plate is arranged at the upper middle part of the pelletizing wheel, and the upper end surface of the inner plate is arranged below the lower end surface of the blanking panel.

[0019] The second bearing seat is fixedly connected to the granulation bottom plate through the first cover plate;

[0020] The outer side of the central shaft is sleeved with a second cover plate and a third cover plate in sequence between the granulating wheel and the pressing wheel. The upper end of the central shaft is threadedly connected with an arch-breaking nut for locking the pressing wheel.

[0021] As a further improvement of this technology, an oil seal 1 is provided between the inner hole of the cover plate 1 and the outer cylindrical surface of the hollow shaft; a polyfluoroethylene sleeve is provided between the inner hole of the granulation bottom plate and the outer cylindrical surface of the hollow shaft; an oil seal 3 is provided between the inner hole of the upper end of the hollow shaft and the outer cylindrical surface of the center shaft; and an oil seal 2 is provided between the inner hole of the cover plate 2 and the outer cylindrical surface of the center shaft.

[0022] As a further improvement of the present technology, the pinion is rotationally connected to the lower panel and the upper panel through bearing seven and bearing eight respectively, and the upper end is meshed with the slewing bearing to form a transmission connection.

[0023] As a further improvement of the present technology, the granulation assembly includes a granulation motor, a support seat, a bearing seat, a bearing end cover, a shaft retaining spring, a granulation shaft, a bearing, a granulation wheel, a housing, fixing bolts, and a granulation door;

[0024] The bearing seat is fixedly connected to the support seat, and a bearing is provided inside. The left end of the granulation shaft is connected to the granulation motor, and the outer circle of the left end is fastened to the inner ring of the bearing. The granulation wheel is fixed to the right end of the granulation shaft by fixing bolts, and the granulation motor is a variable frequency drive motor.

[0025] A bearing end cap is provided at the left end of the bearing seat for positioning the outer ring of the bearing, and a shaft retaining spring is provided at the left end of the whole shaft for positioning the inner ring of the bearing;

[0026] The particle size adjustment wheel is arranged in the shell. The left end of the shell is fixedly connected to the support seat. The right end of the shell is provided with a particle size adjustment door. The upper end is provided with a particle inlet and the lower end is provided with a particle outlet.

[0027] As a further improvement of the present technology, the pelletizer also includes a cooling water trough for dissipating the heat generated during the pelletizing process. The cooling water trough is an annular water trough, the upper end face of which is fixedly connected to the lower plane of the pelletizing bottom plate and is sleeved on the outside of the unloading panel. A partition is provided in the cooling water trough, and a water inlet and a water outlet are respectively provided on the outer wall of the cooling water trough on both sides of the partition. The water inlet and the water outlet are connected to the external water cooling circulation system, and the water inlet is lower than the water outlet.

[0028] As a further improvement of the present technology, the granulator further comprises an air sealing unit, the air sealing unit comprising a first air inlet pipe, a second air inlet pipe, a first sealed air path and a second sealed air path;

[0029] The first air inlet pipe and the second air inlet pipe pass through the lower panel, are inserted into the upper panel, and are sealed and fixedly connected to the upper panel;

[0030] A gap is provided between the upper end surface of the inner panel of the material tray weldment and the lower plane of the blanking panel;

[0031] A first air flow groove is provided at the upper end of the upper panel; a first air vent is provided in the slewing bearing;

[0032] A second gap is provided between the blanking panel and the granulation bottom plate;

[0033] The first sealed air path is as follows: compressed air passes through the first air inlet pipe to fill the internal cavity composed of the gear box, slewing bearing, tray weldment, and blanking panel, and then flows into the outside through the gap formed by the tray weldment and the blanking panel to form an airtight seal;

[0034] The second sealed air path is as follows: compressed air flows into the first air flow groove inside the upper panel through the second air inlet pipe, then passes through the first air vent on the rotary bearing, fills the second gap between the unloading panel and the granulating bottom plate, and finally bypasses the cooling water tank and flows into the outside to form an airtight seal.

[0035] As a further improvement of the present technology, the widths of the gap one and the gap two are set to 0.5 to 1 mm.

[0036] As a further improvement of the present technology, the compressed air introduced into the second air inlet pipe is compressed cold air at 4-10° C., so that the second sealed air path also has an air cooling function to dissipate heat from the granulation bottom plate.

[0037] As a further improvement of the present technology, the air sealing unit further includes a third sealed air path; the outer side wall of the upper end of the second bearing seat is provided with 6 second air vents evenly distributed around the circumference; the first cover plate is provided with 3 third air vents and second air flow grooves evenly distributed around the circumference;

[0038] A PTFE sleeve is provided between the inner hole of the granulating bottom plate, the granulating wheel and the outer cylindrical surface of the hollow shaft. A gap three is provided between the PTFE sleeve and the hollow shaft and the granulating wheel; a gap four is provided between the granulating wheel and the granulating bottom plate;

[0039] The third sealed air path is as follows: compressed air flows into the first air flow groove inside the upper plate through the second air inlet pipe, then passes through the first air vent on the rotary bearing, the second air vent on the bearing seat 2, the third air vent on the cover plate 1 and the second air flow groove, fills the gap 3 formed by the polytetrafluoroethylene sleeve, the hollow shaft and the granulating wheel, flows to the gap 4 between the granulating wheel and the granulating bottom plate, and then flows into the outside to form an airtight seal.

[0040] As a further improvement of the present technology, the widths of the gap three and the gap four are set to 0.2 to 1 mm.

[0041] As a further improvement of the present technology, the compressed air introduced into the second air inlet pipe is compressed cold air at 4-10°C, so that the second sealed air path and the third sealed air path also have an air cooling function to dissipate heat from the granulation bottom plate.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] 1. The present invention sets a granulating motor to drive the granulating wheel to rotate clockwise, and a pressing motor to drive the pressing wheel to rotate counterclockwise, so that the granulating wheel and the pressing wheel rotate coaxially in different directions, and the speed can be independently controlled by the granulating motor and the pressing motor, thereby increasing the applicable range of the granulator for different materials and greatly improving the granulation efficiency;

[0044] 2. The present invention adds a granulation assembly, which enables the granulator to have a granulation function, and the granulation motor is a variable frequency drive motor, the granulation speed is adjustable, and the material particle size is adjustable, which can better meet the material particle size requirements of customers;

[0045] 3. The main shaft and hollow shaft of the present invention are driven by the main gear and the driven gear, and the discharging is driven by the pinion and the rotary bearing, which makes the transmission more accurate and stable, and improves the granulation consistency and granulation yield;

[0046] 4. The present invention adds a water circulation cooling system and a cooling water tank, so that the granulator can be applied to some heat-sensitive materials, increasing the types of materials suitable for granulation and improving the practicality of the granulator;

[0047] 5. The present invention adds an air-sealing unit and is equipped with three sealed air paths, which can effectively prevent materials from entering and adhering to the transmission components, and can reduce the contamination of materials between different batches;

[0048] 6. The compressed air introduced into the second and third sealed air paths is 4-10℃ compressed cold air, which makes the second and third sealed air paths have both air sealing and air cooling functions, strengthens the heat dissipation of the heat generated in the granulation process, improves the heat dissipation performance and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic structural diagram of an embodiment of the present invention;

[0050] Figure 2 A top view of the granulation assembly according to an embodiment of the present invention;

[0051] Figure 3 for Figure 2 Middle AA section view;

[0052] Figure 4 for Figure 2 Middle BB cross-section;

[0053] Figure 5 This is a schematic diagram of the structure of a granulation assembly according to an embodiment of the present invention;

[0054] Figure 6 This is a schematic diagram of a sealed gas circuit according to an embodiment of the present invention;

[0055] Figure 7 for Figure 6 Enlarged view of point I in the middle.

[0056] In the figure: 1. Frame assembly, 2. Granulating assembly, 201. Gear box, 2011. Upper panel, 2011. First air flow slot, 2012. Right side panel, 2013. Lower panel, 2014. Bearing seat 1, 2015. Bearing seat 2, 2015. Second vent, 2016. Left side panel, 2017. Bearing seat 3, 202. Center shaft, 203. Locking nut, 204. Bearing 1, 205. Bearing 2, 206. Hollow shaft, 207. Round nut, 208. Bearing 3 , 209, shaft sleeve one, 210, driven gear, 211, shaft sleeve two, 212, bearing four, 213, round nut with locking groove, 214, rotary bearing, 2141, first vent, 215, material tray weldment, 216, unloading panel, 217, cover plate one, 2171, third vent, 2172, second air flow groove, 218, granulating bottom plate, 219, material wheel, 220, cover plate two, 221, cover plate three, 222, pressure wheel, 223, arch nut, 224, oil seal one, 2 25. PTFE sleeve, 226. Oil seal 2, 227. Oil seal 3, 228. Main shaft, 229. Round nut, 230. Bearing 5, 231. Cover plate 4, 232. Main gear, 233. Bushing 3, 234. Bearing 6, 235. Pinion, 236. Bearing 7, 237. Bearing 8, 238. Bolt assembly, 239. First intake pipe, 240. Second intake pipe, 241. First sealed air path, 242. Second sealed air path, 243. Third sealed air path, 244. Gap 1, 2 45. Gap 2, 246. Gap 3, 247. Gap 4, 248. Cooling water trough, 3. Granulating assembly, 301. Support seat, 302. Bearing seat, 303. Housing, 304. Granulating shaft, 305. Bearing end cover, 306. Shaft retaining ring, 307. Bearing, 308. Granulating wheel, 309. Fixing bolt, 310. Granulating door, 311. Granulating motor, 4. Feed barrel, 5. Screen support ring, 6. Discharge motor, 7. Pressing motor, 8. Granulating motor, 9. Granulating wheel working space. DETAILED DESCRIPTION

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0058] like Figures 1 to 7 As shown, the embodiment of the present invention includes a frame assembly 1, a granulating assembly 2, a granulating assembly 3, a feeding cylinder 4, a screen support ring 5, a discharging motor 6, a pressing motor 7, and a granulating motor 8;

[0059] The granulating assembly 2 includes a gear box 201, a main shaft 228, a main gear 232, a driven gear 210, a hollow shaft 206, a granulating wheel 219, a pressing wheel 222, a central shaft 202, a pinion 235, and a slewing bearing 214;

[0060] The gearbox 201 is arranged on the frame assembly 1 and is welded by the upper panel 2011, the right side panel 2012, the lower panel 2013, the bearing seat 1 2014, the bearing seat 2 2015, the left side panel 2016, and the bearing seat 3 2017. The upper end of the bearing seat 3 2017 and the upper end of the bearing seat 1 2014 are respectively inserted on the left and right sides of the lower panel 2013, and the lower end of the bearing seat 2 2015 is inserted on the upper panel 2011. The bearing seat 1 230 is provided in the bearing seat 1, the bearing seat 2 212 is provided in the bearing seat 2, and the bearing seat 3 208 is provided in the bearing seat 3 2017.

[0061] The main shaft 228 is fixed to the right side of the gear box 201 through bearing five 230 and bearing six 234, and the lower end is connected to the granulation motor 8. The granulation motor 8 is a variable frequency drive motor. The main gear 232 is arranged in the gear box 201 and is fixedly connected to the main shaft 228. The bearing six 234 is arranged in the upper panel 2011. The outer side of the main shaft 228 is sequentially provided with a cover plate four 231 and a round nut 229 at the lower end of the bearing five 230 for axial positioning of the bearing five 230. The outer side of the main shaft 228 is provided with a sleeve three 233 at the lower end of the bearing six 234 for axial positioning of the bearing six 234.

[0062] The outside of the hollow shaft 206 is fixed to the left side of the gear box 201 through bearing three 208 and bearing four 212. The driven gear 210 is arranged in the gear box 201 and is fixedly connected to the hollow shaft 206. At the same time, it is meshed with the main gear 232 for transmission. The outer side of the hollow shaft 206 is respectively provided with a sleeve 1 209 and a round nut 207 at the upper and lower ends of the bearing three 208 for axial positioning of the bearing three 208. The outer side of the hollow shaft 206 is respectively provided with a round nut 213 with a locking groove and a sleeve 2 211 at the upper and lower ends of the bearing four 212 for axial positioning of the bearing four.

[0063] The outer side of the hollow shaft 206 is fixedly connected with a cover plate 1 217 and a granulation bottom plate 218 in sequence above the bearing seat 2015 , and the granulation wheel 219 is fixedly connected to the upper end of the hollow shaft 206 and is arranged above the granulation bottom plate 218 .

[0064] The upper end of the central shaft 202 passes through the bearing 1 204, and the lower end is fixed to the inside of the hollow shaft 206 through the bearing 2 205 and the locking nut 203. The lower end of the central shaft 202 is connected to the output shaft of the pressing motor 7 through a coupling. The pressing motor 7 is a variable frequency drive motor. The pelletizing wheel 222 is fixedly connected to the upper end of the central shaft 202 and is arranged above the pelletizing wheel 219.

[0065] The outer side of the central shaft 202 is provided with a cover plate 220 and a cover plate 3 221 in sequence from bottom to top between the granulating wheel 219 and the pressing wheel 222. The upper end of the central shaft is threadedly connected with an arch-breaking nut 223 for locking the pressing wheel 222.

[0066] The slewing bearing 214 is sleeved on the outside of the bearing seat 2015, the lower end face of the inner ring is fixedly connected to the upper panel 2011, and the upper plane of the outer ring is fixedly connected to the unloading panel 216. A cylindrical sleeve extending upward is provided in the middle of the unloading panel 216, and the upper end face of the cylindrical sleeve is provided below the granulation bottom plate 218.

[0067] like Figure 4 As shown, the pinion 235 is connected to the output shaft of the discharge motor 6 through a bolt assembly 238 and is arranged at the left rear of the hollow shaft 206. The pinion 235 is rotationally connected to the lower panel 2013 and the upper panel 2011 through bearing seven 236 and bearing eight 237 respectively, and the upper end forms a meshing transmission connection with the rotary bearing 214.

[0068] like Figure 1 As shown, the feed cylinder 4 is provided on the mesh plate support ring 5, the mesh plate support ring 5 is fixedly connected to the bearing seat 2015 of the gear box 201 through the granulation bottom plate 218 and the cover plate 1 217, and the granulation wheel 219 is provided in the mesh plate support ring 5;

[0069] The space formed by the granulating wheel 219 , the granulating bottom plate 218 , and the mesh plate support ring 5 is the granulating wheel working space 9 .

[0070] like Figure 3 As shown, a material tray weldment 215 is provided on the upper panel 2011. The outer shape of the material tray weldment 215 is an annular groove structure. The outer plate is higher than the inner plate. The upper end of the outer plate is arranged at the upper middle part of the granulating wheel 219. The upper end surface of the inner plate is arranged below the lower end surface of the blanking panel 216.

[0071] like Figure 1As shown, the granulation assembly 3 is fixed to the left side of the frame assembly 1 through the support base 301, and is used to impact and shear the cylindrical particles of different lengths coming out of the granulation wheel working space 9, and by adjusting the speed of the granulation motor, the particles required by the customer can be obtained;

[0072] like Figure 5 As shown, the grain-forming assembly 3 includes a grain-forming motor 311, a support base 301, a bearing base 302, a bearing end cover 305, a shaft retaining spring 306, a grain-forming shaft 304, a bearing 307, a grain-forming wheel 308, a housing 303, fixing bolts 309, and a grain-forming door 310;

[0073] The bearing seat 302 is fixedly connected to the support seat 301, and a bearing 307 is provided inside. The left end of the grain-forming shaft 304 is connected to the grain-forming motor 311, and the outer circle of the left end is fastened to the inner ring of the bearing 307. The grain-forming wheel 308 is fixed to the right end of the grain-forming shaft 304 by fixing bolts 309. The grain-forming motor 311 is a variable frequency drive motor.

[0074] A bearing end cap 305 is provided at the inner left end of the bearing seat 302 for positioning the outer ring of the bearing 307. A shaft retaining spring 306 is provided at the left end of the whole grain shaft for positioning the inner ring of the bearing 307.

[0075] The particle size adjustment wheel 308 is arranged in the housing 303. The left end of the housing 303 is fixedly connected to the support base 301, the right end is provided with a particle size adjustment door 310, the upper end is provided with a particle inlet, and the lower end is provided with a particle outlet.

[0076] As a preference, Figure 3 As shown, an oil seal 224 is provided between the inner hole of the cover plate 217 and the outer cylindrical surface of the hollow shaft 206; a polytetrafluoroethylene sleeve 225 is provided between the inner hole of the granulating bottom plate 218 and the outer cylindrical surface of the hollow shaft 206; an oil seal 3 227 is provided between the inner hole of the upper end of the hollow shaft 206 and the outer cylindrical surface of the center shaft 202; and an oil seal 226 is provided between the inner hole of the cover plate 220 and the outer cylindrical surface of the center shaft 202.

[0077] As a preference, Figure 3 As shown, the pelletizer of the embodiment of the present invention also includes a cooling water trough 248 for dissipating the heat generated during the pelletizing process. The cooling water trough 248 is an annular water trough, the upper end face of which is fixedly connected to the lower plane of the pelletizing bottom plate 118 and is sleeved on the outside of the discharge panel 216. A partition is provided in the cooling water trough 248, and a water inlet and a water outlet are respectively provided on both sides of the partition on the outer wall of the cooling water trough 248. The water inlet and the water outlet are connected to an external water cooling circulation system, and the water inlet is lower than the water outlet.

[0078] As a preference, Figure 6 、 7As shown, the granulator according to the embodiment of the present invention further includes an air sealing unit, which includes a first air inlet pipe 239, a second air inlet pipe 240, a first sealed air path 241 and a second sealed air path 242;

[0079] The first air inlet pipe 239 and the second air inlet pipe 240 pass through the lower panel 2013, are inserted into the upper panel 2011, and are sealed and fixedly connected to the upper panel 2011;

[0080] A gap 244 is provided between the upper end surface of the inner panel of the material tray weldment 215 and the lower plane of the blanking panel 216, and the height of the gap 244 is set to 1 mm;

[0081] A first air flow groove 20111 is provided at the upper end of the upper panel 2011; a first air vent 2141 is provided in the rotary bearing 214;

[0082] A second gap 245 is provided between the blanking panel 216 and the granulating bottom plate 218, and the height of the second gap is set to 0.5 mm;

[0083] The first sealed air path 241 is as follows: compressed air passes through the first air inlet pipe 239 and fills the internal cavity formed by the gear box 201, the rotary bearing 214, the material tray weldment 215, and the material discharge panel 216, and then flows into the outside through the gap 244 formed by the material tray weldment 215 and the material discharge panel 216, forming an airtight seal.

[0084] The second sealed air path 242 is as follows: compressed air flows into the first air flow groove 20111 inside the upper panel 2011 through the second air inlet pipe 240, then passes through the first air vent 2141 on the rotary bearing 214, fills the gap 245 between the unloading panel 216 and the granulation bottom plate 218, and finally bypasses the cooling water tank 241 and flows into the outside to form an airtight seal.

[0085] As a preference, Figure 6 、 7 As shown, the airtight unit further includes a third sealed air path 243; six second air vents 20151 evenly distributed around the circumference are provided on the outer side wall of the upper end of the second bearing seat 2015; three third air vents 2171 and second air flow grooves 2172 evenly distributed around the circumference are provided on the first cover plate 217; a third gap 246 is provided between the PTFE sleeve 225 and the hollow shaft 206 and the pelletizing wheel 219; and a fourth gap 247 is provided between the pelletizing wheel 219 and the pelletizing bottom plate 218;

[0086] The third sealed air path 243 is as follows: compressed air flows into the first air flow groove 20111 inside the upper plate 2011 through the second air inlet pipe 240, and then passes through the first air vent 2141 on the rotary bearing 214, the second air vent 20151 on the bearing seat 2015 and the third air vent 2171 and the second air flow groove 2172 on the cover plate 1 217, filling the gap 3 246 formed by the polytetrafluoroethylene sleeve 225, the hollow shaft 206 and the granulating wheel 219, and flows to the gap 4 247 between the granulating wheel 219 and the granulating bottom plate 218, and then flows into the outside to form an airtight seal.

[0087] Preferably, the compressed air introduced into the second air inlet pipe 240 is compressed cold air at 4-10° C., so that the second sealed air path 242 and the third sealed air path 243 also have an air cooling function to dissipate heat from the granulating bottom plate 218 .

[0088] The working mode of the embodiment of the present invention is as follows: the material to be granulated is poured into the feed barrel 4, and the pressing speed is set to 50 rpm (pressing motor speed), the granulating speed is 40 rpm (hollow shaft speed) and the granulating speed is 1400 rpm (granulating motor speed) according to the granulating process corresponding to the material, the sealed air path is connected for air supply sealing, the first air inlet pipe 239 inputs normal temperature compressed air, the second air inlet pipe 240 inputs 4-10 ℃ compressed cold air, the air supply pressure is 0.3 MPa, the cooling water tank 248 is connected for water circulation cooling, the pressing motor 7, the granulating motor 8, the discharging motor 6 and the granulating motor 311 are started, and the pressing motor 7 drives the motor installed on the central shaft 2 The pressing wheel 222 on 02 rotates counterclockwise, forcing the material to move downward and transporting the material to the granulating wheel working space 9. The granulating motor 8 drives the driven gear 210 through the main gear 232, thereby driving the granulating wheel 219 installed on the hollow shaft 206 to rotate clockwise. The discharging motor 6 drives the unloading panel 216 fixed on the rotary bearing 214 to rotate clockwise through the small gear 235. The material is extruded and granulated under the joint action of the pressing wheel 222 and the granulating wheel 219. The material particles formed by extrusion are transported to the granulating assembly 3 through the unloading panel 216, and granulated under the action of the granulating wheel 308 to obtain particles that meet the process requirements.

[0089] In the embodiment of the present invention, the granulating wheel 219 and the pressing wheel 222 rotate coaxially in opposite directions, and the speed can be independently controlled by the granulating motor 8 and the pressing motor 7, which increases the applicability of the present embodiment to different materials and greatly improves the granulation efficiency. In the embodiment of the present invention, a granulating assembly 3 is added to enable the granulator to have a granulating function, and the granulating motor is a variable frequency drive motor, and the granulating speed is adjustable, so that the material particle size can be adjusted, which can better meet the customer's material particle size requirements. In the embodiment of the present invention, the main shaft 228 and the hollow shaft 206 are driven by the main gear 232 and the driven gear 210, and the discharging is driven by the small gear 235 and the rotary bearing 214, so that the transmission is more accurate and stable, and the granulation efficiency is improved. The embodiment of the present invention adds a water circulation cooling system and a cooling water tank 248, so that the pelletizer can be applied to some heat-sensitive materials, increases the types of materials suitable for pelletizing, and improves the practicality of the pelletizer; the embodiment of the present invention adds an air-sealing unit and is provided with a three-way sealed air path, which can effectively prevent materials from entering and adhering between transmission components, and can reduce material contamination between different batches; the embodiment of the present invention introduces compressed cold air into the second air inlet pipe 240, so that the second sealed air path 242 and the third sealed air path 243 have both air-sealing and air-cooling functions, thereby strengthening the heat dissipation of heat generated during the pelletizing process, improving the heat dissipation performance, and extending the service life of the equipment.

[0090] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An airtight, water-cooled rotary granulator, characterized in that: It includes a frame assembly (1), a granulating assembly (2), a granulating assembly (3), a feeding barrel (4), a screen support ring (5), a discharging motor (6), a pressing motor (7), and a granulating motor (8); The granulation assembly (2) includes a gear box (201), a main shaft (228), a main gear (232), a driven gear (210), a hollow shaft (206), a granulation wheel (219), a pressing wheel (222), a central shaft (202), a pinion (235), and a slewing bearing (214); The gear box (201) is arranged on the frame assembly (1), the main shaft (228) is arranged on the right side of the gear box (201) and is connected to the pelletizing motor (8), the main gear (232) is arranged in the gear box (201) and is fixedly connected to the main shaft (228), the hollow shaft (206) is arranged on the left side of the gear box (201), the driven gear (210) is arranged in the gear box (201), is fixedly connected to the hollow shaft (206), and is meshed with the main gear (232) for transmission, and the pelletizing wheel (219) is fixedly connected to the upper end of the hollow shaft (206); The central shaft (202) is sleeved in the hollow shaft (206) and connected to the output shaft of the pressing motor (7); the pressing wheel (222) is fixedly connected to the upper end of the central shaft (202) and is arranged above the granulating wheel (219); The pinion (235) is connected to the output shaft of the discharge motor (6), is arranged at the left rear of the hollow shaft (206), and is meshed with the rotary bearing (214) for transmission. The rotary bearing (214) is sleeved on the outside of the hollow shaft and is arranged below the pelletizing wheel (219). The upper end face of the outer ring of the rotary bearing (214) is fixedly connected to the discharge panel (216), and the inner ring is fixedly connected to the upper panel of the gear box (201); The feed barrel (4) is arranged on the mesh plate support ring (5), the mesh plate support ring (5) is fixedly connected to the gear box (201), the granulating wheel (219) is arranged in the mesh plate support ring (5), and a granulating bottom plate (218) is provided below and fixedly connected to the mesh plate support ring (5), and the space formed by the granulating wheel (219), the granulating bottom plate (218) and the mesh plate support ring (5) is the granulating wheel working space (9); The granulation assembly (3) is fixed to the left side of the frame assembly (1) through a support seat (301) and is used to impact and shear cylindrical particles of varying lengths coming out of the granulation wheel working space (9), and by adjusting the rotation speed of the granulation motor, particles required by the customer can be obtained; The pressing motor (7) and the granulating motor (8) are both variable frequency drive motors; During operation, the pressing motor (7) drives the pressing wheel (222) located at the upper end of the central shaft (202) to rotate counterclockwise, forcing the material to move downward and transporting the material to the granulating wheel working space (9), and the granulating motor (8) drives the driven gear (210) through the main gear (232), thereby driving the granulating wheel (219) located at the upper end of the hollow shaft (206) to rotate clockwise; the material is extruded outward and granulated under the joint action of the pressing wheel (222) and the granulating wheel (219), and the discharging motor (6) drives the discharge panel (216) fixed on the rotary bearing (214) to rotate clockwise through the pinion (235), so that the extruded particles are transported to the granulating assembly (3) through the discharge panel (216) for granulation; The gear box (201) is welded together by an upper panel (2011), a right side panel (2012), a lower panel (2013), a bearing seat 1 (2014), a bearing seat 2 (2015), a left side panel (2016), and a bearing seat 3 (2017); the upper end of the bearing seat 3 (2017) and the upper end of the bearing seat 1 (2014) are respectively inserted on the left and right sides of the lower panel (2013); the lower end of the bearing seat 2 (2015) is inserted on the upper panel (2011); the bearing seat 1 (2014) is provided with a bearing 5 (230); the bearing seat 2 (2015) is provided with a bearing 4 (212); and the bearing seat 3 (208) is provided in the bearing seat 3 (2017); A material tray weldment (215) is provided on the upper panel (211), and the material tray weldment (215) has an annular groove structure, with an outer plate higher than an inner plate, the upper end of the outer plate is provided at the middle upper portion of the pelletizing wheel (219), and the upper end surface of the inner plate is provided below the lower end surface of the unloading panel (216); The second bearing seat (215) is fixedly connected to the granulation bottom plate (218) via the first cover plate (217); The outer side of the central shaft (202) is provided with a second cover plate (220) and a third cover plate (221) in sequence between the pelletizing wheel (219) and the pressing wheel (222); the upper end of the central shaft is threadedly connected with an arch-breaking nut (223) for locking the pressing wheel (222); The granulator further comprises an air-sealing unit, wherein the air-sealing unit comprises a first air inlet pipe (239), a second air inlet pipe (240), a first sealed air path (241), and a second sealed air path (242); The first air inlet pipe (239) and the second air inlet pipe (240) pass through the lower panel (2013), are inserted into the upper panel (2011), and are sealed and fixedly connected to the upper panel (2011); A gap (244) is provided between the upper end surface of the inner panel of the material tray weldment (215) and the lower plane of the blanking panel (216); A first air flow groove (20111) is provided at the upper end of the interior of the upper panel (2011); a first air vent (2141) is provided in the rotary bearing (214); A second gap (245) is provided between the blanking panel (216) and the granulation bottom plate (218); The first sealed air path (241) is as follows: compressed air passes through the first air inlet pipe (239) to fill the internal cavity composed of the gear box (201), the slewing bearing (214), the material tray weldment (215), and the blanking panel (216), and then flows into the outside through a gap (244) formed by the material tray weldment (215) and the blanking panel (216), forming an airtight seal; The second sealed air path (242) is as follows: compressed air flows into the first air flow groove (20111) inside the upper panel (2011) through the second air inlet pipe (240), then passes through the first air vent (2141) on the rotary bearing (214), fills the second gap (245) between the unloading panel (216) and the granulating bottom plate (218), and finally bypasses the cooling water tank (248) and flows into the outside to form an airtight seal.

2. The airtight water-cooled rotary granulator according to claim 1, characterized in that: The main shaft (228) is fixed inside the gear box (201) through a fifth bearing (230) and a sixth bearing (234), and the sixth bearing (234) is arranged inside the upper panel (2011); The upper end of the central shaft (202) is fixed inside the hollow shaft (206) through the first bearing (204), and the lower end is fixed through the second bearing (205) and the locking nut (203); The outside of the hollow shaft (206) is fixed in the gear box (201) via bearing three (208) and bearing four (212).

3. The airtight water-cooled rotary granulator according to claim 1, characterized in that: The slewing bearing (214) is sleeved on the outside of the second bearing seat (215), the lower end surface of the inner ring is fixedly connected to the upper panel (211), and the upper end surface of the outer ring is fixedly connected to the blanking panel (216).

4. The airtight water-cooled rotary granulator according to claim 1, characterized in that: An oil seal 1 (224) is sleeved between the inner hole of the cover plate 1 (217) and the outer cylindrical surface of the hollow shaft (206); a polytetrafluoroethylene sleeve (225) is sleeved between the inner hole of the granulating bottom plate (218) and the outer cylindrical surface of the hollow shaft (206); an oil seal 3 (227) is sleeved between the inner hole of the upper end of the hollow shaft (206) and the outer cylindrical surface of the central shaft (202); and an oil seal 2 (226) is sleeved between the inner hole of the cover plate 2 (220) and the outer cylindrical surface of the central shaft (202).

5. The airtight water-cooled rotary granulator according to claim 1, characterized in that: The pinion (235) is rotationally connected to the lower panel (2013) and the upper panel (211) via bearing seven (236) and bearing eight (237), respectively, and the upper end is meshed with the rotary bearing (214) to form a transmission connection.

6. The airtight water-cooled rotary granulator according to claim 1, characterized in that: The granulation assembly (3) includes a granulation motor (311), a support seat (301), a bearing seat (302), a bearing end cover (305), a shaft retaining spring (306), a granulation shaft (304), a bearing (307), a granulation wheel (308), a housing (303), a fixing bolt (309), and a granulation door (310); The bearing seat (302) is fixedly connected to the support seat (301), and a bearing (307) is provided inside. The left end of the granulation shaft (304) is connected to the granulation motor (311), and the outer circle of the left end is fastened to the inner ring of the bearing (307). The granulation wheel (308) is fixed to the right end of the granulation shaft (304) by a fixing bolt (309). The granulation motor (311) is a variable frequency drive motor. A bearing end cover (305) is provided at the inner left end of the bearing seat (302) for positioning the outer ring of the bearing (307); a shaft retaining spring (306) is provided at the left end of the whole grain shaft for positioning the inner ring of the bearing (307); The particle size adjustment wheel (308) is arranged in the housing (303). The left end of the housing (303) is fixedly connected to the support base (301), the right end is provided with a particle size adjustment door (310), the upper end is provided with a particle inlet, and the lower end is provided with a particle outlet.

7. The airtight water-cooled rotary granulator according to claim 1, characterized in that: The pelletizer also includes a cooling water trough (248) for dissipating heat generated during the pelletizing process. The cooling water trough (248) is an annular water trough, the upper end surface of which is fixedly connected to the lower plane of the pelletizing bottom plate (218) and is sleeved on the outside of the unloading panel (216). A partition is provided in the cooling water trough (248), and a water inlet and a water outlet are respectively provided on the outer wall of the cooling water trough (248) on both sides of the partition. The water inlet and the water outlet are connected to an external water cooling circulation system, and the water inlet is lower than the water outlet.

8. The airtight, water-cooled rotary granulator according to claim 1, characterized in that: The width of the gap 1 (244) and the gap 2 (245) is set to 0.5-1 mm.

9. The airtight, water-cooled rotary granulator according to claim 1, characterized in that: The compressed air introduced into the second air inlet pipe (240) is compressed cold air at 4-10°C, so that the second sealed air path (242) also has an air cooling function to dissipate heat from the granulation bottom plate (218).

10. The airtight, water-cooled rotary granulator according to claim 1, characterized in that: The airtight sealing unit further comprises a third airtight sealing path (243); six second air vents (20151) evenly distributed around the circumference are provided on the outer side wall of the upper end of the second bearing seat (215); three third air vents (2171) evenly distributed around the circumference and a second air flow groove (2172) are provided on the first cover plate (217); A polytetrafluoroethylene (PTFE) sleeve (225) is provided between the inner holes of the granulating bottom plate (218) and the granulating wheel (219) and the outer circumferential surface of the hollow shaft (206); a gap (246) is provided between the polytetrafluoroethylene (PTFE) sleeve (225) and the hollow shaft (206) and the granulating wheel (219); and a gap (247) is provided between the granulating wheel (219) and the granulating bottom plate (218); The third sealed air path (243) is as follows: compressed air flows into the first air flow groove (20111) inside the upper panel (2011) through the second air inlet pipe (240), then passes through the first air vent (2141) on the rotary bearing (214), the second air vent (20151) on the bearing seat 2 (2015), the third air vent (2171) and the second air flow groove (2172) on the cover plate 1 (217), fills the gap 3 (246) formed by the polytetrafluoroethylene sleeve (225), the hollow shaft (206) and the granulating wheel (219), flows to the gap 4 (247) between the granulating wheel (219) and the granulating bottom plate (218), and then flows into the outside to form an airtight seal.

11. The airtight, water-cooled rotary granulator according to claim 10, characterized in that: The width of the gap three (246) and the gap four (247) is set to 0.2 to 1 mm.

12. The airtight, water-cooled rotary granulator according to claim 10, characterized in that: The compressed air introduced into the second air inlet pipe (240) is compressed cold air at 4 to 10°C, so that the second sealed air path (242) and the third sealed air path (243) also have an air cooling function to dissipate heat from the granulation bottom plate (218).

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