Constant-temperature high-speed underwater granulator

Abstract

The invention relates to the technical field of granulation, in particular to a constant-temperature high-speed underwater granulator which comprises an underwater granulator base, and a high-speed granulation mechanism is mounted on the upper end face of the underwater granulator base; the synchronous cutting mechanism can synchronously drive the two annular cutting knives to move up and down, and the two annular cutting knives moving up and down can cut off a melt extruded from the cylindrical melt extrusion ports communicating with the interiors of the two melt conveying grooves and a melt located in the cylindrical melt extrusion ports, so that the melt is changed into particles. The cut particles can enter the particle guide pipe and independently move upwards along the particle guide pipe, and by means of the technical scheme, the situation that the particles which are not completely solidified adhere to one another can be prevented while the production efficiency of equipment is improved; the problems that the production efficiency is low, and the product quality is affected due to the fact that particles which are just cut are likely to adhere together when making contact with one another are solved.

Description

Technical Field

[0001] The invention relates to the technical field of granulation, in particular to a constant-temperature high-speed underwater granulator. Background Art

[0002] Underwater granulator is a kind of equipment used for the production of plastic granules. It extrude the molten polymer through the template hole and cut it into granules by a rotating knife in a circulating water source. The cut granules will then move with the circulating water source and be cooled and solidified by the water source. When the granules solidified in the water source touch the filter screen, they will be screened by the filter screen and fall along the filter screen to the inside of the collection device. This process can reduce the oxidation of the polymer, is almost dust-free, and can produce high-quality granules, such as TPU granules.

[0003] During the operation of the underwater pelletizer, a water temperature control system is required to control the temperature of the cooling water to maintain a constant temperature. The control of water temperature is crucial to ensure the shape and quality of the pellets. If the water temperature is too high or too low, it may affect the molding and cooling of the pellets, thereby causing product quality problems. This kind of underwater pelletizer equipped with a water temperature control system that can control the cooling water at a constant temperature can be called a constant temperature underwater pelletizer.

[0004] However, this type of constant temperature underwater granulator has low production efficiency and can only produce one type of granules at a time. It has low flexibility and if the granules that have just been cut by the rotating knife and have not yet completely solidified come into contact with each other, the granules that are in contact with each other may stick together, resulting in deformed granule shapes. Therefore, it does not meet existing needs. We have proposed a constant temperature high-speed underwater granulator. Summary of the invention

[0005] The object of the present invention is to provide a constant temperature high-speed underwater granulator to solve the problems that the constant temperature underwater granulator proposed in the above background technology has low production efficiency and can only produce one type of granules at a time, has low flexibility, and if the granules that have just been cut by the rotating knife and have not been completely solidified come into contact with each other, the granules that are in contact with each other may stick together, thereby causing the shape of the granules to be deformed.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a constant temperature high-speed underwater granulator, comprising an underwater granulator base, the upper end surface of the underwater granulator base is equipped with a high-speed granulator mechanism, the high-speed granulator mechanism comprises two granular raw material hot melt pumps, two conveying augers, two arc-shaped melt conveying heads, a synchronous rotation mechanism and a synchronous granule anti-sticking cutting mechanism, the two conveying augers are respectively located inside the two granular raw material hot melt pumps, and the synchronous rotation mechanism can synchronously drive the two augers to rotate;

[0007] The two arc-shaped melt delivery heads are respectively fixedly installed on the rear end surfaces of the two particle raw material hot melt pumps, and the synchronous particle anti-sticking cutting mechanism is fixed between the two arc-shaped melt delivery heads. The synchronous particle anti-sticking cutting mechanism includes a synchronous cutting mechanism, two cylindrical metal shells, two conical surfaces, two melt delivery pipes and two melt delivery grooves. The two melt delivery grooves are respectively located inside the two cylindrical metal shells. The two melt delivery pipes are respectively connected to the surfaces of the two arc-shaped melt delivery heads facing the cylindrical metal shells, and the interior of the melt delivery pipe is communicated with the interior of the melt delivery groove.

[0008] A circle of cylindrical melt extrusion ports extending to the outer surface of the cylindrical metal shell through the cylindrical metal shell is provided on the upper side of the inside of the melt conveying groove, and an annular knife receiving groove is provided above the multiple cylindrical melt extrusion ports located on the outer surface of the same cylindrical metal shell, and an annular cutting knife is provided inside each of the two annular knife receiving grooves, and the synchronous cutting mechanism can synchronously drive the two annular cutting knives to move up and down in a cycle;

[0009] A particle guide tube fixed to the outer surface of the cylindrical metal shell is provided on one side of the cylindrical melt extrusion port, a through opening is provided on one side of the lower end surface of the particle guide tube, and the lower end surface of the cylindrical metal shell is a conical surface.

[0010] Preferably, the synchronous particle anti-sticking cutting mechanism also includes a square metal block, a particle cutting tube is fixedly provided on both sides of the outer surface of the square metal block, and the two cylindrical metal shells are respectively located inside the two particle cutting tubes.

[0011] Preferably, one side of the lower end surface of the particle cutting tube is connected to a return pipe connector, and the lower end surface of the return pipe connector is connected to a water source return pipe;

[0012] One side of the upper end surface of the particle cutting tube is connected with a water outlet pipe connector, and the upper end surface of the water outlet pipe connector is connected with a water outlet pipe.

[0013] Preferably, the interior of the particle cutting tube is provided with a fixing sleeve arranged on the upper side of the outer surface of the cylindrical metal shell, and the fixing sleeve is fixed with a fixing rod on the surface facing the square metal block, and the fixing rod is fixed between the surface facing the square metal block and the inner wall of the particle cutting tube.

[0014] Preferably, the synchronous cutting mechanism comprises a motor support base, a stepper motor is fixedly mounted on the upper end surface of the motor support base, an output shaft of the stepper motor is connected to a lifting shaft via a coupling, and an outer surface of the lifting shaft is provided with a wavy lifting rail.

[0015] Preferably, a metal sleeve is sleeved on the upper side of the outer surface of the lifting shaft, a lifting slider slidably connected to the inside of the wavy lifting rail is fixedly provided on both sides of the inner wall of the metal sleeve, and a first connecting rod is fixedly provided on both sides of the outer surface of the metal sleeve.

[0016] Preferably, the bottom end of the first connecting rod extends to the upper side of the interior of the cylindrical metal shell by passing through the particle cutting tube and the upper end surface of the cylindrical metal shell, the first connecting rod is slidingly connected to the particle cutting tube and the cylindrical metal shell, the position where the first connecting rod contacts the particle cutting tube and the cylindrical metal shell is sealed, a second connecting rod is fixed on both sides of the outer surface of the first connecting rod located inside the cylindrical metal shell, and the other end of the second connecting rod is fixed to the inner wall of the annular cutting knife.

[0017] Preferably, an inclined annular particle collection groove is provided above the bottom end of the first connecting rod and is located on the inner wall of the particle cutting tube, and the inclined annular particle collection groove is communicated with the interior of the water outlet pipe connector.

[0018] Preferably, the synchronous rotation mechanism includes an auger rotating motor, a synchronous chain is provided at the rear of the auger rotating motor, an auger transmission shaft is provided on both sides of the synchronous chain, the two auger transmission shafts are connected in series through the synchronous chain, the two auger transmission shafts are respectively fixed to the front end surfaces of the two conveying augers, and the output shaft of the auger rotating motor is connected to the auger transmission shaft closest to it through a coupling.

[0019] Preferably, a feeding hopper is fixedly mounted on one side of the upper end surface of the granular raw material hot melt pump, and the interior of the feeding hopper is communicated with the interior of the granular raw material hot melt pump.

[0020] The present invention can add granular raw materials into the inside of the feeding hoppers located above the two granular raw material hot melt pumps respectively. The granular raw materials will fall into the inside of the granular raw material hot melt pumps under the action of gravity and be melted into melts. The two melts will be respectively transported by the conveying augers located inside the two granular raw material hot melt pumps to the inside of two melt conveying grooves located inside the synchronous granular anti-sticking cutting mechanism. The melt entering the melt conveying groove will be extruded from a plurality of cylindrical melt extrusion ports. The synchronous cutting mechanism can synchronously drive the two annular cutting knives to move up and down. The two annular cutting knives that move up and down can cut off the melt extruded from the cylindrical melt extrusion ports respectively connected to the inside of the two melt conveying grooves and the melt located inside the cylindrical melt extrusion ports to turn them into particles. The above technical solution can simultaneously produce two completely different particles, thereby improving the production efficiency of the equipment and its flexibility.

[0021] The present invention also requires starting the water circulation of the equipment before adding raw materials. Through the water circulation of the equipment, the cooling water can enter the interior of the particle cutting tube from the water source return pipe, and flow upward to the interior of the water outlet pipe through the particle cutting tube. When the upward-flowing water source enters the interior of the particle cutting tube, it will first contact the conical surface located at the lower end face of the cylindrical metal shell. The conical surface can make the water source in contact with it flow along the conical surface. The water source flowing along the conical surface will enter the interior of the particle guide tube through the opening located at the lower end face of the particle guide tube. Through multiple particle guide tubes, the flowing water source can be divided into multiple different water flows. The particles cut by the annular cutting knife will enter the interior of the corresponding particle guide tube. Through the water source flowing inside the particle guide tube, the particles can move upward alone along the particle guide tube. Through the above-mentioned technical scheme, it is possible to prevent the particles that have just been cut and have not yet completely solidified from contacting each other, thereby causing multiple particles to stick together, thereby ensuring the quality of the particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a top view of the internal structure of the present invention;

[0024] Figure 3 For the present invention Figure 1 A magnified view of the structure at center A;

[0025] Figure 4 This is a front view of the internal structure of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified view of the structure at B in the middle;

[0027] Figure 6 For the present invention Figure 4 Enlarged view of the structure at C in the middle. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] See also Figures 1 to 6 The present invention provides a constant temperature high-speed underwater granulator, including an underwater granulator base 1, a high-speed granulator mechanism is installed on the upper end surface of the underwater granulator base 1, the high-speed granulator mechanism includes two granular raw material hot melt pumps 3, two conveying augers 4, two arc-shaped melt conveying heads 9, a synchronous rotation mechanism and a synchronous granule anti-sticking cutting mechanism 2, the two conveying augers 4 are respectively located inside the two granular raw material hot melt pumps 3, and the synchronous rotation mechanism can synchronously drive the two augers transmission shafts 5 to rotate.

[0030] A feeding hopper 8 is fixedly installed on one side of the upper end surface of the granular raw material hot melt pump 3, and the interior of the feeding hopper 8 is communicated with the interior of the granular raw material hot melt pump 3; when the equipment needs to be used, the granular raw material is added to the interior of the feeding hopper 8 located above the two granular raw material hot melt pumps 3 respectively, and the granular raw material will fall into the interior of the granular raw material hot melt pump 3 under the action of gravity and be melted into a melt.

[0031] The synchronous rotation mechanism provided by the present invention includes an auger rotating motor 6, a synchronous chain 7 is provided at the rear of the auger rotating motor 6, an auger transmission shaft 5 is provided on both sides inside the synchronous chain 7, the two auger transmission shafts 5 are connected in series through the synchronous chain 7, the two auger transmission shafts 5 are respectively fixed to the front end surfaces of the two conveying augers 4, and the output shaft of the auger rotating motor 6 is connected to the auger transmission shaft 5 closest to it through a coupling; when the raw materials are melted, the auger rotating motor 6 is started, and the auger transmission shaft 5 connected to it can be driven to rotate through the auger rotating motor 6, and when one of the auger transmission shafts 5 rotates, the other auger transmission shaft 5 connected in series with it through the synchronous chain 7 will rotate synchronously with it, and the two rotating auger transmission shafts 5 can synchronously drive the two conveying augers 4 to rotate together.

[0032] The two arc-shaped melt delivery heads 9 are respectively fixedly installed on the rear end surfaces of the two particle raw material hot melt pumps 3, and the synchronous particle anti-sticking cutting mechanism 2 is fixed between the two arc-shaped melt delivery heads 9. The synchronous particle anti-sticking cutting mechanism 2 includes a synchronous cutting mechanism, two cylindrical metal shells 212, two conical surfaces 213, two melt delivery pipes 214 and two melt delivery grooves 215. The two melt delivery grooves 215 are respectively located inside the two cylindrical metal shells 212. The two melt delivery pipes 214 are respectively connected to the two arc-shaped melt delivery heads 9. The surface faces the cylindrical metal shell 212, and the interior of the melt delivery pipe 214 is communicated with the interior of the melt delivery groove 215; the melt can be delivered to the interior of the arc-shaped melt delivery head 9 through the rotating delivery auger 4, and is delivered to the interior of the melt delivery groove 215 located inside the synchronous particle anti-sticking cutting mechanism 2 through the arc-shaped melt delivery head 9 and the melt delivery pipe 214. Through the above technical solution, two portions of melt can be respectively delivered to the interiors of the two melt delivery grooves 215 located in the synchronous particle anti-sticking cutting mechanism 2.

[0033] A circle of cylindrical melt extrusion ports 216 are provided on the upper side of the interior of the melt conveying trough 215, which extend through the cylindrical metal shell 212 and extend to the outer surface of the cylindrical metal shell 212. An annular knife receiving groove 226 is provided above the multiple cylindrical melt extrusion ports 216 located on the outer surface of the same cylindrical metal shell 212. An annular cutting knife 219 is provided inside the two annular knife receiving grooves 226, and the synchronous cutting mechanism can synchronously drive the two annular cutting knives 219 to move up and down in a cycle; the melt entering the melt conveying trough 215 will be extruded from the multiple cylindrical melt extrusion ports 216.

[0034] Please continue reading Figures 1 to 6The synchronous cutting mechanism provided by the present invention comprises a motor support base 202, a stepper motor 203 is fixedly mounted on the upper end surface of the motor support base 202, the output shaft of the stepper motor 203 is connected to a lifting shaft 204 through a coupling, and the outer surface of the lifting shaft 204 is provided with a wavy lifting rail 205; a metal sleeve 206 is sleeved on the upper side of the outer surface of the lifting shaft 204, and a lifting slider 207 slidably connected to the inside of the wavy lifting rail 205 is fixedly provided on both sides of the inner wall of the metal sleeve 206, and a first connecting rod 208 is fixedly provided on both sides of the outer surface of the metal sleeve 206; the bottom end of the first connecting rod 208 extends to the cylindrical metal shell 212 by penetrating the particle cutting tube 209 and the upper end surface of the cylindrical metal shell 212. 12, the first connecting rod 208 is slidably connected with the particle cutting tube 209 and the cylindrical metal shell 212, and the contact position between the first connecting rod 208, the particle cutting tube 209 and the cylindrical metal shell 212 is sealed. A second connecting rod 220 is fixedly provided on both sides of the outer surface of the first connecting rod 208 located inside the cylindrical metal shell 212, and the other end of the second connecting rod 220 is fixed to the inner wall of the annular cutting knife 219; when the melt located inside the cylindrical melt extrusion port 216 is extruded, the stepper motor 203 is started, and the stepper motor 203 can drive the lifting shaft 204 connected thereto and the wavy lifting slide rail 205 located on the outer surface of the lifting shaft 204 to rotate together.

[0035] Since the metal sleeve 206 sleeved on the outer surface of the lifting shaft 204 is indirectly fixedly connected to the annular cutting blade 219 through the two first connecting rods 208, the metal sleeve 206 and the lifting slider 207 located on the inner wall of the metal sleeve 206 cannot rotate. When the wavy lifting rail 205 rises and falls due to rotation, the lifting slider 207 slidably connected to the inside of the wavy lifting rail 205 will move up and down along the wavy lifting rail 205, and the lifting slider 207 moving up and down will drive the lifting slider 207 that is in contact with it to move up and down. The second connecting rod 220 connected to the first connecting rod 208 moves up and down together. When the second connecting rod 220 moves up and down, the annular cutting knife 219 fixed thereto will move up and down synchronously accordingly. The annular cutting knife 219 that moves up and down cyclically can cut off the melt extruded from the cylindrical melt extrusion port 216 and the melt located inside the cylindrical melt extrusion port 216 to form particles. Through the above technical solution, two completely different particles can be produced at the same time, thereby improving the production efficiency of the equipment and its flexibility.

[0036] A particle guide tube 217 fixed to the outer surface of the cylindrical metal shell 212 is provided on one side of the cylindrical melt extrusion port 216, a through opening 218 is provided on one side of the lower end surface of the particle guide tube 217, and the lower end surface of the cylindrical metal shell 212 is a conical surface 213; the synchronous particle anti-sticking cutting mechanism 2 also includes a square metal block 201, and a particle cutting tube 209 is fixed on both sides of the outer surface of the square metal block 201, and the two cylindrical metal shells 212 are respectively located inside the two particle cutting tubes 209; a return pipe connector 210 is connected to one side of the lower end surface of the particle cutting tube 209, and the lower end surface of the return pipe connector 210 is connected to a water source return pipe 211.

[0037] One side of the upper end surface of the particle cutting tube 209 is connected to a water outlet pipe connector 221, and the upper end surface of the water outlet pipe connector 221 is connected to a water outlet pipe 222; before adding raw materials, it is necessary to start the water circulation of the equipment first, so that the cooling water can enter the interior of the particle cutting tube 209 from the water source return pipe 211 through the water circulation of the equipment, and flow upward through the particle cutting tube 209 to the interior of the water outlet pipe 222. When the upward-flowing water source enters the interior of the particle cutting tube 209, it will first contact the conical surface 213 located at the lower end surface of the cylindrical metal shell 212, and the water source in contact with it can flow along the conical surface 213 through the conical surface 213, and flow along the conical surface 21 The flowing water source will enter the particle guide tube 217 through the opening 218 located at the lower end surface of the particle guide tube 217. The flowing water source can be divided into multiple different water flows through multiple particle guide tubes 217. The particles cut by the annular cutting knife 219 will enter the corresponding particle guide tube 217. The water source flowing inside the particle guide tube 217 can make the particles move upward along the particle guide tube 217 alone. The above technical solution can prevent the particles that have just been cut and have not been completely solidified from contacting each other, thereby causing multiple particles to stick together, thereby ensuring the quality of the particles.

[0038] The interior of the particle cutting tube 209 is provided with a fixing sleeve 223 which is fixedly mounted on the upper side of the outer surface of the cylindrical metal shell 212. The fixing sleeve 223 is fixedly mounted with a fixing rod 224 on the surface facing the square metal block 201, and the fixing rod 224 is fixed between the surface facing the square metal block 201 and the inner wall of the particle cutting tube 209. By fixing the fixing sleeve 223 which is fixedly mounted on the outer surface of the cylindrical metal shell 212, the cylindrical metal shell 212 can be fixed to the interior of the particle cutting tube 209 to prevent it from moving due to the impact of the water source.

[0039] A beveled annular particle collecting groove 225 is provided above the bottom end of the first connecting rod 208 and is located on the inner wall of the particle cutting tube 209, and the beveled annular particle collecting groove 225 is communicated with the interior of the water outlet pipe connector 221; particles leaving the particle guide tube 217 will contact the inner wall of the beveled annular particle collecting groove 225, and enter the interior of the water outlet pipe connector 221 along the beveled annular particle collecting groove 225, and finally enter the interior of the water outlet pipe 222 along the water outlet pipe connector 221.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A constant temperature high speed underwater granulator, characterized in that: The invention comprises an underwater pelletizing machine base (1), wherein a high-speed pelletizing mechanism is installed on the upper end surface of the underwater pelletizing machine base (1), wherein the high-speed pelletizing mechanism comprises two pellet raw material hot melt pumps (3), two conveying augers (4), two arc-shaped melt conveying heads (9), a synchronous rotation mechanism and a synchronous pellet anti-sticking cutting mechanism (2), wherein the two conveying augers (4) are respectively located inside the two pellet raw material hot melt pumps (3), and the synchronous rotation mechanism can synchronously drive the two augers transmission shafts (5) to rotate; The two arc-shaped melt conveying heads (9) are respectively fixedly installed on the rear end surfaces of the two particle raw material hot melt pumps (3), and the synchronous particle anti-sticking cutting mechanism (2) is fixed between the two arc-shaped melt conveying heads (9). The synchronous particle anti-sticking cutting mechanism (2) comprises a synchronous cutting mechanism, two cylindrical metal shells (212), two conical surfaces (213), two melt conveying pipes (214) and two melt conveying grooves (215). The two melt conveying grooves (215) are respectively located inside the two cylindrical metal shells (212). The two melt conveying pipes (214) are respectively connected to the surfaces of the two arc-shaped melt conveying heads (9) facing the cylindrical metal shells (212), and the interior of the melt conveying pipes (214) is communicated with the interior of the melt conveying grooves (215). A circle of cylindrical melt extrusion ports (216) are provided on the upper side of the interior of the melt conveying groove (215), which pass through the cylindrical metal shell (212) and extend to the outer surface of the cylindrical metal shell (212); an annular knife receiving groove (226) is provided above the multiple cylindrical melt extrusion ports (216) located on the outer surface of the same cylindrical metal shell (212); an annular cutting knife (219) is provided inside each of the two annular knife receiving grooves (226); and a synchronous cutting mechanism can synchronously drive the two annular cutting knives (219) to move up and down in a cycle; A particle guide tube (217) fixed to the outer surface of the cylindrical metal shell (212) is provided on one side of the cylindrical melt extrusion port (216); a through opening (218) is provided on one side of the lower end surface of the particle guide tube (217); and the lower end surface of the cylindrical metal shell (212) is a conical surface (213).

2. The constant temperature high speed underwater granulator according to claim 1, characterized in that: The synchronous particle anti-sticking cutting mechanism (2) also includes a square metal block (201), a particle cutting tube (209) is fixedly provided on both sides of the outer surface of the square metal block (201), and the two cylindrical metal shells (212) are respectively located inside the two particle cutting tubes (209).

3. The constant temperature high speed underwater granulator according to claim 2, characterized in that: One side of the lower end surface of the particle cutting pipe (209) is connected to a return pipe connector (210), and the lower end surface of the return pipe connector (210) is connected to a water source return pipe (211); One side of the upper end surface of the particle cutting tube (209) is connected to a water outlet pipe connector (221), and the upper end surface of the water outlet pipe connector (221) is connected to a water outlet pipe (222).

4. The constant temperature high speed underwater granulator according to claim 2, characterized in that: The interior of the particle cutting tube (209) is provided with a fixing sleeve (223) fixedly mounted on the upper side of the outer surface of the cylindrical metal shell (212); the surface of the fixing sleeve (223) facing the square metal block (201) is fixedly provided with a fixing rod (224); and the surface of the fixing rod (224) facing the square metal block (201) is fixed to the inner wall of the particle cutting tube (209).

5. The constant temperature high speed underwater granulator according to claim 1, characterized in that: The synchronous cutting mechanism comprises a motor support base (202), a stepper motor (203) is fixedly mounted on the upper end surface of the motor support base (202), an output shaft of the stepper motor (203) is connected to a lifting shaft (204) via a coupling, and a wave-shaped lifting slide rail (205) is provided on the outer surface of the lifting shaft (204).

6. The constant temperature high speed underwater granulator according to claim 5, characterized in that: A metal sleeve (206) is sleeved on the upper side of the outer surface of the lifting shaft (204), and a lifting slider (207) slidably connected to the inside of the wave-shaped lifting rail (205) is fixedly provided on both sides of the inner wall of the metal sleeve (206), and a first connecting rod (208) is fixedly provided on both sides of the outer surface of the metal sleeve (206).

7. The constant temperature high speed underwater granulator according to claim 6, characterized in that: The bottom end of the first connecting rod (208) extends to the upper side of the inside of the cylindrical metal shell (212) by passing through the particle cutting tube (209) and the upper end surface of the cylindrical metal shell (212), and the first connecting rod (208) is slidably connected to the particle cutting tube (209) and the cylindrical metal shell (212). The contact position between the first connecting rod (208) and the particle cutting tube (209) and the cylindrical metal shell (212) is sealed, and a second connecting rod (220) is fixed on both sides of the outer surface of the first connecting rod (208) located inside the cylindrical metal shell (212), and the other end of the second connecting rod (220) is fixed to the inner wall of the annular cutting knife (219).

8. The constant temperature high speed underwater granulator according to claim 7, characterized in that: A beveled annular particle collection groove (225) is provided above the bottom end of the first connecting rod (208) and is located on the inner wall of the particle cutting tube (209), and the beveled annular particle collection groove (225) is communicated with the interior of the water outlet pipe connector (221).

9. The constant temperature high speed underwater granulator according to claim 1, characterized in that: The synchronous rotation mechanism comprises an auger rotating motor (6), a synchronous chain (7) is arranged at the rear of the auger rotating motor (6), an auger transmission shaft (5) is arranged on both sides inside the synchronous chain (7), the two auger transmission shafts (5) are connected in series via the synchronous chain (7), the two auger transmission shafts (5) are respectively fixed to the front end surfaces of the two conveying augers (4), and the output shaft of the auger rotating motor (6) is connected to the auger transmission shaft (5) closest to it via a coupling.

10. The constant temperature high speed underwater granulator according to claim 1, characterized in that: A feeding hopper (8) is fixedly mounted on one side of the upper end surface of the granular raw material hot melt pump (3), and the interior of the feeding hopper (8) is in communication with the interior of the granular raw material hot melt pump (3).

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