Rolling granulator and working method thereof

Abstract

The invention discloses a roll-in granulator and a working method thereof, and relates to the technical field of roll-in granulators, the roll-in granulator comprises a base, a box body, a spiral feeder, a driving roll-in cylinder, a driven roll-in cylinder and a roll-in cylinder shaft, and heat dissipation mechanisms are arranged in the driving roll-in cylinder and the driven roll-in cylinder. Hollow rods in a driving rolling cylinder and a driven rolling cylinder rotate to drive a driving gear ring to rotate, the driving gear ring drives a driven gear ring in meshed connection with the driving gear ring to rotate, and the driven gear ring drives fan blades on a rotating rod to rotate; when the fan blades rotate, outside cold air is filtered by the dustproof ventilation net and then enters the driving rolling cylinder and the driven rolling cylinder from the roller shaft at the rear end, the cold air flows in the rolling cylinders, heat in the rolling cylinders can be absorbed, then the heat is transmitted to the outside air through the dustproof ventilation net of the roller shaft at the front end, the heat in the rolling cylinders can be rapidly dissipated, and the heat dissipation efficiency is improved. And therefore, the purpose of reducing the temperature in the rolling cylinder is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of roller compacting granulators, in particular to a roller compacting granulator and a working method thereof. Background Art

[0002] Roller granulator is a mechanical equipment that uses the roller pressing principle to press materials into a specific shape. It is usually composed of two or more relatively rotating rollers. The material is compressed and formed by the extrusion force between the rollers. After entering the roller granulator, the material is squeezed by the roller and gradually compressed to form dense flakes. These flakes are separated from the roller surface under the elastic recovery of the roller, and then crushed and sieved by a crushing and granulating machine to obtain granular products that meet the requirements. Roller granulator is widely used in many fields, including chemical, petrochemical, pharmaceutical, food and other industries.

[0003] The Chinese patent proposes a dry roller granulator, the publication number of which is CN204865754U, which includes a frame platform, on which a flaking unit is arranged, which is connected to a hydraulic system; a granulator, a granulator and a grading oscillating screen are connected in sequence below the flaking unit; a screw feeder is arranged above the flaking unit, which is connected to a quantitative feeder, and the material inlet of the quantitative feeder is aligned with the material outlet of the bucket elevator; a primary granulation structure and a secondary granulation structure are arranged in the granulator, and the grading oscillating screen includes a three-layer vibrating screen.

[0004] The device has the effects of good granulation size uniformity, consistent particle size, and significantly improved bulk density. However, during the operation of the roller cylinder of the granulator, a large amount of heat will be generated due to the friction between the material and the roller surface and the elastic and plastic deformation under high pressure. If this heat is not dissipated in time, the roller surface temperature will continue to rise and may also cause increased wear on the roller surface, thereby affecting the service life of the roller cylinder and the use of the granulator.

[0005] Therefore, the design is highly practical and the hollow rods in the active roller cylinder and the driven roller cylinder drive the active gear ring to rotate when they rotate, and the active gear ring drives the driven gear ring meshed with it to rotate, and the driven gear ring drives the fan blades on the rotating rod to rotate. When the fan blades rotate, the external cold air enters the active roller cylinder and the driven roller cylinder from the rear end roller shaft after being filtered through the dust-proof ventilation net. The cold air flowing in the roller cylinder can absorb the heat inside the roller cylinder, and then it is transferred to the outside air through the dust-proof ventilation net of the front end roller shaft, so that the heat inside the roller cylinder can be quickly dissipated, thereby achieving the purpose of reducing the internal temperature of the roller cylinder. A roller pelletizer and a working method are very necessary. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a roller compacting granulator and a working method thereof.

[0007] To achieve the above object, the present invention provides the following technical solutions: A roller compacting pelletizer comprises a base, a box body, a spiral feeder, an active roller pressing cylinder, a driven roller pressing cylinder and a roller shaft, wherein the active roller pressing cylinder and the driven roller pressing cylinder are provided with a heat dissipation mechanism, and the box body is provided with a screening mechanism; the heat dissipation mechanism comprises a hollow rod and a stepper motor arranged in the active roller pressing cylinder and the driven roller pressing cylinder, a belt transmission assembly is arranged for transmission between the rear end of the hollow rod in the active roller pressing cylinder and the output rod of the stepper motor, the front and rear ends of the hollow rod are fixedly sleeved with a connecting bracket fixedly connected to the roller shaft, a rotating rod is rotatably arranged between the connecting brackets at the front and rear ends, a driving gear ring is fixedly sleeved on the hollow rod, a driven gear ring meshed with the driving gear ring is fixedly sleeved on the rotating rod, and fan blades are fixedly sleeved on the front and rear ends of the rotating rod; a fixing ring is fixedly sleeved on the hollow rod, and the active roller pressing cylinder and A heat conducting ring is fixedly arranged in the driven roller pressure cylinder, a heat conducting plate is fixedly connected between the heat conducting ring and the fixed ring, and a plurality of heat conducting fins are fixedly arranged on the heat conducting plate; a plurality of cooling pipes are arranged in the hollow rod, and a shunt pipe is arranged in communication between the plurality of cooling pipes, and the shunt pipe extends into the hollow rod again after passing through the hollow rod and is communicated with the rear end cooling pipe; a cooling water tank is fixedly arranged on the base, a cylinder is arranged at both ends of the box body, a water inlet pipe is arranged in communication between the bottom of the cylinder body and the cooling water tank, a connecting pipe is arranged between the cooling pipe and the cylinder body, and a reflux pipe is arranged between the cooling pipe and the cooling water tank, a piston is sealingly and slidably connected in the cylinder body, a connecting rod is fixedly arranged on the piston, the top of the connecting rod slides through the cylinder body and is fixedly connected with a fixing plate, and a transmission assembly is arranged between the stepping motor and the fixing plate.

[0008] According to the above technical solution, there are four rotating rods in total, and the four rotating rods are arranged in a circular array on the connecting bracket with the hollow rod as the axis. The roller shaft at the rear end is the air inlet end, and the roller shaft at the front end is the air outlet end. A dustproof ventilation net is fixedly arranged in the gap between the connecting bracket and the roller shaft, and the two groups of fan blades are respectively arranged in the two roller shafts, and the active gear ring and the driven gear ring are both arranged in the rear end roller shaft.

[0009] According to the above technical solution, there are multiple heat-conducting rings, which are evenly spaced inside the active roller pressing cylinder and the driven roller pressing cylinder. There are multiple heat-conducting plates connected between the heat-conducting ring and the fixed ring, and the multiple heat-conducting plates are arranged in a circular array with the fixed ring as the axis between the fixed ring and the heat-conducting ring.

[0010] According to the above technical solution, a water filling pipe is connected to the cooling water tank, a liquid level observation window is opened on one side of the cooling water tank, fixed seats fixedly connected to the two cylinders are fixedly arranged at both ends of the box body, and multiple shunt pipes connected between the multiple cooling pipes are provided, and the multiple shunt pipes are arranged between four rotating rods. The multiple shunt pipes are in a group, and each group of shunt pipes is arranged between two heat conductive rings.

[0011] According to the above technical solution, a rotating joint is provided between the water outlet of the connecting pipe and the water inlet of the cooling pipe, and between the water outlet of the cooling pipe and the water inlet of the return pipe, and a one-way valve is provided in the water inlet of the water inlet pipe and the water outlet of the connecting pipe, and the installation directions of the two one-way valves are opposite.

[0012] According to the above technical solution, a motor bracket fixedly connected to the stepper motor is fixedly arranged on the base, and the transmission assembly between the stepper motor and the fixed plate includes a first rotating plate, and the first rotating plate is fixedly arranged at the front end of the output shaft of the stepper motor, and a rotating long plate is rotatably connected to the end of the first rotating plate away from the stepper motor through a movable shaft.

[0013] According to the above technical solution, the rotating long plate is rotatably connected to the second rotating plate through a movable shaft at one end away from the first rotating plate, and two meshing gears are fixedly provided at the front ends of the two movable shafts. A rotating shaft is rotatably provided at one end of the second rotating plate close to the first rotating plate, and a connecting frame is fixedly sleeved on the rotating shaft, and the front end bottom of the connecting frame is fixedly connected to the fixed plate.

[0014] According to the above technical scheme, a material guiding chamber, a granulation chamber and a screening chamber are respectively provided in the box body, the bottom of the spiral feeder penetrates the box body and extends into the material guiding chamber, a support frame for fixing the spiral feeder is fixedly provided on the box body, a material feeding driving machine for driving the spiral feeder is fixedly provided on the support frame, a feeding pipe is connected to the spiral feeder, the active roller pressing cylinder and the driven roller pressing cylinder are arranged in the granulation chamber, a transmission gear assembly is provided between the two roller shafts at the front ends of the active roller pressing cylinder and the driven roller pressing cylinder, a discharge pipe connected to the screening chamber is fixedly provided on the box body, a guide seat is provided in the screening chamber, and a driving groove is provided at one end of the box body.

[0015] According to the above technical solution, the screening mechanism includes a screening plate arranged in the screening chamber, one end of the screening plate is hinged to the screening chamber, a slide groove connected to the screening chamber is opened in the driving groove, a sliding rod is fixedly arranged in the slide groove, a sliding block fixedly connected to the other end of the screening plate is slidably connected to the sliding rod, a spring fixedly arranged between the sliding block and the slide groove is sleeved on the sliding rod, a connecting plate is fixedly arranged at one end of the sliding block, a servo motor is fixedly arranged in the driving groove, and a cam intermittently contacting the connecting plate is fixedly arranged on the output shaft of the servo motor.

[0016] Based on the roller compacting granulator described above, the present invention further proposes a working method of the roller compacting granulator, comprising the following steps: Step 1: Put the material into the spiral feeder through the feed pipe, and the material falls evenly into the box, and then is introduced into the granulation chamber through the material guide chamber; Step 2: Control the stepper motor to make the active roller press and the driven roller press extrude and granulate the material. When the active roller press and the driven roller press are working, the heat dissipation mechanism dissipates heat and cools the active roller press and the driven roller press; Step 3: The extruded material particles fall onto the screen plate in the screening chamber, and the servo motor is controlled to make the screen plate vibrate and screen the material particles to prevent the material particles from accumulating and blocking the screen holes. Then the material particles pass through the screen plate and fall onto the guide seat and are discharged through the discharge pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention drives the active gear ring to rotate through the hollow rods in the active roller cylinder and the driven roller cylinder when they rotate, and the active gear ring drives the driven gear ring meshed with it to rotate, and the driven gear ring drives the fan blades on the rotating rod to rotate. When the fan blades rotate, the external cold air enters the active roller cylinder and the driven roller cylinder from the rear roller shaft after being filtered by the dustproof ventilation net. The cold air flowing in the roller cylinder can absorb the heat inside the roller cylinder, and then transfers it to the outside air through the dustproof ventilation net of the front roller shaft, so that the heat inside the roller cylinder can be quickly dissipated, thereby achieving the purpose of reducing the internal temperature of the roller cylinder.

[0018] 2. The present invention, through the provision of a heat-conducting ring, enables the surface heat of the active roller cylinder and the driven roller cylinder to be transferred to the heat-conducting ring, and then to the heat-conducting plate. A plurality of heat-conducting fins provided on the heat-conducting plate can disperse and absorb the heat, and then the airflow introduced by the fan blades dissipates the heat to the heat-conducting fins, thereby improving the heat dissipation effect of the active roller cylinder and the driven roller cylinder, thereby accelerating the dissipation of heat inside the active roller cylinder and the driven roller cylinder and improving the cooling efficiency.

[0019] 3. In the present invention, when the stepper motor rotates, the connecting frame can drive the connecting rod to move up and down through the fixed plate, so that the piston can reciprocate up and down in the cylinder, so that the cooling water in the cooling water tank can be continuously sucked into the cylinder and squeezed into the connecting pipe. The cooling water is transported to the cooling pipe inside the hollow rod through the connecting pipe. Under the action of the cooling pipe and the shunt pipe connected to the cooling pipe and extending out of the hollow rod, the heat inside the roller cylinder and on the heat-conducting fins can be absorbed by the cooling water. The cooling water that absorbs the heat continues to flow and flows back into the cooling water tank through the reflux pipe for cooling again, so that the cooling water can realize circulating cooling of the roller cylinder, thereby further improving the cooling efficiency and heat dissipation effect of the roller cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0021] In the attached picture: Figure 1 It is a front view of the three-dimensional structure of a roller compacting granulator in an embodiment of the present invention; Figure 2 It is a rear view of the three-dimensional structure of a roller compacting granulator in an embodiment of the present invention; Figure 3 is a schematic cross-sectional structural diagram of a box body in an embodiment of the present invention; Figure 4 is a schematic diagram of the three-dimensional structure of the heat dissipation mechanism in an embodiment of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the active roller pressing cylinder and the driven roller pressing cylinder in an embodiment of the present invention; Figure 6 is a schematic cross-sectional structural diagram of an active roller pressing cylinder in an embodiment of the present invention; Figure 7 is a schematic diagram of the three-dimensional structure of a heat-conducting ring in an embodiment of the present invention; Figure 8 is a schematic cross-sectional structural diagram of a cylinder in an embodiment of the present invention; Fig. 9 is a schematic diagram of the three-dimensional structure of the screening mechanism in an embodiment of the present invention; Fig.10 In the embodiment of the present invention Fig. 9 A magnified view of the structure at center.

[0022] In the figure: 1, base; 2, box; 201, material guide chamber; 202, granulation chamber; 203, screening chamber; 204, guide seat; 205, driving groove; 3, spiral feeder; 4, active roller pressing cylinder; 5, driven roller pressing cylinder; 6, roller shaft; 7, transmission gear assembly; 8, heat dissipation mechanism; 801, hollow rod; 802, connecting bracket; 803, stepping motor; 804, belt transmission assembly; 805, motor bracket; 806, dustproof ventilation net; 807, rotating rod; 808, active gear ring; 809, driven gear ring; 810, fan blade; 811, heat conduction ring; 812, fixing ring; 813, heat conduction plate; 814, heat conduction fin; 815, cooling pipe; 816, shunt pipe; 817, cooling water tank; 818, fixed seat; 819, cylinder; 820, water inlet pipe; 821, connecting pipe; 822, one-way valve; 823, return pipe; 824, rotary joint; 825, piston; 826, connecting rod; 827, fixed plate; 828, first rotating plate; 829, second rotating plate; 830, rotating long plate; 831, gear; 832, rotating shaft; 833, connecting frame; 9, screening mechanism; 901, screening plate; 902, slider; 903, slide groove; 904, slide rod; 905, spring; 906, connecting plate; 907, servo motor; 908, cam; 10, feeding pipe; 11, discharging pipe; 12, supporting frame; 13, unloading drive machine. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Embodiment 1: Combination Figure 1-Figure 10The present invention provides a technical solution: a roller granulator, comprising a base 1, a box body 2, a screw feeder 3, an active roller pressing cylinder 4, a driven roller pressing cylinder 5 and a roller shaft 6, wherein a material guiding chamber 201, a granulating chamber 202 and a screening chamber 203 are respectively provided in the box body 2, the bottom of the screw feeder 3 passes through the box body 2 and extends into the material guiding chamber 201, a support frame 12 for fixing the screw feeder 3 is fixedly provided on the box body 2, a material feeding driving machine 13 for driving the screw feeder 3 is fixedly provided on the support frame 12, and the screw feeder 3 is provided with a material feeding driving machine 13. A feeding pipe 10 is connected to the material container 3, the active roller cylinder 4 and the driven roller cylinder 5 are arranged in the granulation chamber 202, a transmission gear assembly 7 is transmitted between the two roller shafts 6 at the front ends of the active roller cylinder 4 and the driven roller cylinder 5, a discharge pipe 11 connected to the screening chamber 203 is fixedly arranged on the box body 2, a guide seat 204 is arranged in the screening chamber 203, a driving groove 205 is opened at one end of the box body 2, a heat dissipation mechanism 8 is arranged in the active roller cylinder 4 and the driven roller cylinder 5, and a screening mechanism 9 is arranged in the box body 2.

[0026] Specifically, the material feeding drive 13 is controlled to start the screw feeder 3 to put the material into the screw feeder 3 through the feeding pipe 10 , and the material falls evenly into the box body 2 , and then is introduced into the granulation chamber 202 through the material guiding chamber 201 .

[0027] See also Figure 4-Figure 6 , it is further obtained that the heat dissipation mechanism 8 includes a hollow rod 801 and a stepper motor 803 arranged in the active roller cylinder 4 and the driven roller cylinder 5, a belt transmission assembly 804 is arranged between the rear end of the hollow rod 801 in the active roller cylinder 4 and the output rod of the stepper motor 803, the front and rear ends of the hollow rod 801 are fixedly sleeved with a connecting bracket 802 fixedly connected to the roller shaft 6, a rotating rod 807 is rotatably arranged between the connecting brackets 802 at the front and rear ends, a driving gear ring 808 is fixedly sleeved on the hollow rod 801, and a driving gear ring 808 is fixedly sleeved on the rotating rod 807 The driven gear ring 809 is meshed with the gear ring 808, and the front and rear ends of the rotating rod 807 are fixedly sleeved with fan blades 810; there are four rotating rods 807 in total, and the four rotating rods 807 are arranged in a circular array on the connecting bracket 802 with the hollow rod 801 as the axis, the rear end roller shaft 6 is the air inlet end, and the front end roller shaft 6 is the air outlet end, and a dustproof ventilation net 806 is fixedly arranged in the gap between the connecting bracket 802 and the roller shaft 6, and two groups of fan blades 810 are respectively arranged in the two roller shafts 6, and the active gear ring 808 and the driven gear ring 809 are both arranged in the rear end roller shaft 6.

[0028] Specifically, the stepper motor 803 is controlled to work so that the hollow rod 801 drives the active roller pressing cylinder 4 to rotate through the connecting bracket 802, and the driven roller pressing cylinder 5 and the active roller pressing cylinder 4 rotate in opposite directions under the transmission action of the transmission gear assembly 7, and the materials are extruded and granulated by the active roller pressing cylinder 4 and the driven roller pressing cylinder 5; the hollow rod 801 in the active roller pressing cylinder 4 and the driven roller pressing cylinder 5 drives the active gear ring 808 to rotate when rotating, and the active gear ring 808 drives the driven gear ring 809 meshed with it. The driven gear ring 809 drives the fan blades 810 on the rotating rod 807 to rotate. When the fan blades 810 rotate, the external cold air is filtered by the dust-proof ventilation net 806 and enters the active roller cylinder 4 and the driven roller cylinder 5 from the rear end roller shaft 6. The cold air flowing in the roller cylinder can absorb the heat inside the roller cylinder, and then it is transferred to the external air through the dust-proof ventilation net 806 of the front end roller shaft 6, so that the heat inside the roller cylinder can be quickly dissipated, thereby achieving the purpose of reducing the internal temperature of the roller cylinder.

[0029] See also Figure 6 and Figure 7 , it is further obtained that a fixed ring 812 is fixedly sleeved on the hollow rod 801, a heat-conducting ring 811 is fixedly arranged in the active roller cylinder 4 and the driven roller cylinder 5, a heat-conducting plate 813 is fixedly connected between the heat-conducting ring 811 and the fixed ring 812, and a plurality of heat-conducting fins 814 are fixedly arranged on the heat-conducting plate 813; a plurality of heat-conducting rings 811 are arranged, and the plurality of heat-conducting rings 811 are evenly spaced in the active roller cylinder 4 and the driven roller cylinder 5, a plurality of heat-conducting plates 813 connected between the heat-conducting ring 811 and the fixed ring 812 are arranged, and the plurality of heat-conducting plates 813 are arranged in a circular array with the fixed ring 812 as the axis between the fixed ring 812 and the heat-conducting ring 811.

[0030] Specifically, through the setting of the heat-conducting ring 811, the surface heat of the active roller cylinder 4 and the driven roller cylinder 5 can be transferred to the heat-conducting ring 811, and then transferred to the heat-conducting plate 813. The multiple heat-conducting fins 814 arranged on the heat-conducting plate 813 can disperse and absorb the heat. Then, the airflow introduced by the fan blades 810 dissipates the heat to the heat-conducting fins 814, thereby improving the heat dissipation effect of the active roller cylinder 4 and the driven roller cylinder 5, thereby accelerating the dissipation of internal heat of the active roller cylinder 4 and the driven roller cylinder 5 and improving the cooling efficiency.

[0031] See also Figure 8, it is further obtained that a plurality of cooling pipes 815 are arranged in the hollow rod 801, a shunt pipe 816 is arranged between the plurality of cooling pipes 815, the shunt pipe 816 penetrates the hollow rod 801 and then extends into the hollow rod 801 again to communicate with the rear cooling pipe 815, a cooling water tank 817 is fixedly arranged on the base 1, a cylinder 819 is arranged at both ends of the box body 2, a water inlet pipe 820 is arranged between the bottom of the cylinder 819 and the cooling water tank 817, a connecting pipe 821 is arranged between the cooling pipe 815 and the cylinder 819, a return pipe 823 is arranged between the cooling pipe 815 and the cooling water tank 817, and the cylinder 81 9 is sealed and slidably connected with a piston 825, a connecting rod 826 is fixedly arranged on the piston 825, the top of the connecting rod 826 slides through the cylinder 819 and is fixedly connected with a fixing plate 827, a transmission assembly is arranged between the stepping motor 803 and the fixing plate 827, a water injection pipe is connected to the cooling water tank 817, a liquid level observation window is provided on one side of the cooling water tank 817, a fixing seat 818 fixedly connected to the two cylinders 819 is fixedly arranged at both ends of the box body 2, a plurality of shunt pipes 816 connected between the plurality of cooling pipes 815 are arranged, the plurality of shunt pipes 816 are arranged between the four rotating rods 807, and ... The pipes 816 are in a group, and each group of manifold pipes 816 is arranged between two heat-conducting rings 811. A rotating joint 824 is arranged between the water outlet of the connecting pipe 821 and the water inlet of the cooling pipe 815, and between the water outlet of the cooling pipe 815 and the water inlet of the return pipe 823. A one-way valve 822 is arranged in the water inlet of the water inlet pipe 820 and the water outlet of the connecting pipe 821. The installation directions of the two one-way valves 822 are opposite. A motor bracket 805 fixedly connected to the stepper motor 803 is fixedly arranged on the base 1. The transmission assembly between the stepper motor 803 and the fixed plate 827 includes a first rotating plate 828, and the first rotating plate 829 is fixedly arranged on the base 1. The movable plate 828 is fixedly set at the front end of the output shaft of the stepper motor 803. The end of the first rotating plate 828 away from the stepper motor 803 is rotatably connected to a rotating long plate 830 through a movable shaft. The end of the rotating long plate 830 away from the first rotating plate 828 is rotatably connected to a second rotating plate 829 through a movable shaft. Two meshing gears 831 are fixedly set at the front ends of the two movable shafts. A rotating shaft 832 is rotatably set on the end of the second rotating plate 829 close to the first rotating plate 828. A connecting frame 833 is fixedly sleeved on the rotating shaft 832. The front end bottom of the connecting frame 833 is fixedly connected to the fixed plate 827.

[0032] Specifically, when the stepper motor 803 rotates, it drives the first rotating plate 828 to rotate, and the first rotating plate 828 drives the second rotating plate 829 to rotate through the rotating long plate 830. At the same time, under the transmission action of the two gears 831 at the front ends of the first rotating plate 828 and the second rotating plate 829, when the first rotating plate 828, the second rotating plate 829 and the rotating long plate 830 rotate, the two gears 831 always keep meshing and make elliptical circular motion with the center point of the rotating long plate 830 as the circle, so that when the lower end of the second rotating plate 829 rotates, it can drive the connecting frame 833 to make reciprocating motion up and down through the rotating shaft 832, and the connecting frame 833 drives the connecting rod 826 to move up and down through the fixed plate 827, so that the piston 825 can reciprocate up and down in the cylinder 819. When the piston 825 moves upward, negative pressure is generated inside the cylinder 819, so that the cooling water in the cooling water tank 817 can pass through the water inlet pipe 820 is sucked into the cylinder 819. When the piston 825 moves downward, the pressure in the cylinder 819 increases, so that the cooling water can be squeezed into the connecting pipe 821. The one-way valve 822 arranged on the water inlet pipe 820 and the connecting pipe 821 can prevent the cooling water from flowing back. The cooling water is transported to the cooling pipe 815 inside the hollow rod 801 through the connecting pipe 821. Under the action of the cooling pipe 815 and the shunt pipe 816 connected to the cooling pipe 815 and extending out of the hollow rod 801, the heat inside the roller cylinder and on the heat-conducting fins 814 can be absorbed by the cooling water. The cooling water that absorbs the heat continues to flow and flows back into the cooling water tank 817 through the reflux pipe 823 to be cooled again, so that the cooling water can realize the circulating cooling of the roller cylinder, further improving the cooling efficiency and heat dissipation effect of the roller cylinder. Through the setting of the rotating joint 824, the connecting pipe 821 will not rotate with the cooling pipe 815.

[0033] Example 2: See Fig. 9 and Fig.10 , and on the basis of Example 1, it is further obtained that the screening mechanism 9 includes a screening plate 901 arranged in the screening chamber 203, one end of the screening plate 901 is hinged to the screening chamber 203, a slide groove 903 connected to the screening chamber 203 is opened in the driving groove 205, a slide rod 904 is fixedly arranged in the slide groove 903, a slider 902 fixedly connected to the other end of the screening plate 901 is slidably connected to the slide rod 904, a spring 905 fixedly arranged between the slider 902 and the slide groove 903 is sleeved on the slide rod 904, a connecting plate 906 is fixedly arranged at one end of the slider 902, a servo motor 907 is fixedly arranged in the driving groove 205, and a cam 908 intermittently contacting the connecting plate 906 is fixedly arranged on the output shaft of the servo motor 907.

[0034] Specifically, the material particles squeezed into granules by the active roller 4 and the driven roller 5 fall onto the screen plate 901 in the screen chamber 203, and the servo motor 907 is controlled to drive the cam 908 to rotate. The rotation of the cam 908 can intermittently push the connecting plate 906 to move, so that the slider 902 can move upward along the surface of the slide bar 904 in the slide groove 903. Under the action of the spring 905, the cam 908 drives the slider 902 to reset when it is not in contact with the connecting plate 906, so that one end of the screen plate 901 can vibrate up and down, and then the material particles can be vibrated and screened to prevent the material particles from being discharged too quickly and accumulating and causing the screen holes to be blocked. After that, the material particles pass through the screen plate 901 and fall onto the guide seat 204 and are discharged through the discharge pipe 11.

[0035] In the description of the present invention, it is necessary to understand that the terms "center", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A roller compacting granulator, comprising a base (1), a housing (2), a screw feeder (3), an active roller compacting cylinder (4), a driven roller compacting cylinder (5) and a roller shaft (6), characterized in that: The active roller pressing cylinder (4) and the driven roller pressing cylinder (5) are provided with a heat dissipation mechanism (8), and the box body (2) is provided with a material screening mechanism (9); The heat dissipation mechanism (8) comprises a hollow rod (801) and a stepper motor (803) arranged in the active roller cylinder (4) and the driven roller cylinder (5); a belt transmission assembly (804) is arranged between the rear end of the hollow rod (801) in the active roller cylinder (4) and the output rod of the stepper motor (803); the front and rear ends of the hollow rod (801) are both fixedly sleeved with a connecting bracket (802) fixedly connected to the roller shaft (6); a rotating rod (807) is rotatably arranged between the connecting brackets (802) at the front and rear ends; a driving gear ring (808) is fixedly sleeved on the hollow rod (801); a driven gear ring (809) meshingly connected to the driving gear ring (808) is fixedly sleeved on the rotating rod (807); and fan blades (810) are fixedly sleeved on the front and rear ends of the rotating rod (807); A fixed ring (812) is fixedly sleeved on the hollow rod (801), a heat-conducting ring (811) is fixedly arranged inside the active roller pressing cylinder (4) and the driven roller pressing cylinder (5), a heat-conducting plate (813) is fixedly connected between the heat-conducting ring (811) and the fixed ring (812), and a plurality of heat-conducting fins (814) are fixedly arranged on the heat-conducting plate (813); A plurality of cooling pipes (815) are arranged in the hollow rod (801), a shunt pipe (816) is arranged in communication between the plurality of cooling pipes (815), the shunt pipe (816) passes through the hollow rod (801) and then extends into the hollow rod (801) again to communicate with the rear cooling pipe (815), a cooling water tank (817) is fixedly arranged on the base (1), a cylinder (819) is arranged at both ends of the box body (2), and a water inlet pipe (820) is arranged in communication between the bottom of the cylinder body (819) and the cooling water tank (817). A connecting pipe (821) is provided between the cooling pipe (815) and the cylinder (819), a return pipe (823) is provided between the cooling pipe (815) and the cooling water tank (817), a piston (825) is sealingly and slidably connected inside the cylinder (819), a connecting rod (826) is fixedly provided on the piston (825), the top of the connecting rod (826) slides through the cylinder (819) and is fixedly connected to a fixing plate (827), and a transmission assembly is provided between the stepping motor (803) and the fixing plate (827).

2. A roller granulator according to claim 1, characterized in that: A total of four rotating rods (807) are provided. The four rotating rods (807) are arranged in a circular array on the connecting bracket (802) with the hollow rod (801) as the axis. The roller shaft (6) at the rear end is the air inlet end, and the roller shaft (6) at the front end is the air outlet end. A dustproof ventilation net (806) is fixedly provided in the gap between the connecting bracket (802) and the roller shaft (6). The two groups of fan blades (810) are respectively arranged in the two roller shafts (6). The active gear ring (808) and the driven gear ring (809) are both arranged in the rear end roller shaft (6).

3. A roller granulator according to claim 1, characterized in that: A plurality of the heat-conducting rings (811) are provided, and the plurality of heat-conducting rings (811) are evenly spaced and arranged inside the active roller pressing cylinder (4) and the driven roller pressing cylinder (5). A plurality of heat-conducting plates (813) connected between the heat-conducting rings (811) and the fixed ring (812) are provided, and the plurality of heat-conducting plates (813) are arranged in a ring array between the fixed ring (812) and the heat-conducting ring (811) with the fixed ring (812) as the axis.

4. A roller granulator according to claim 1, characterized in that: A water injection pipe is connected to the cooling water tank (817), a liquid level observation window is provided on one side of the cooling water tank (817), fixed seats (818) fixedly connected to two cylinders (819) are fixedly provided at both ends of the box body (2), a plurality of shunt pipes (816) are provided to connect the plurality of cooling pipes (815), the plurality of shunt pipes (816) are arranged between four rotating rods (807), the plurality of shunt pipes (816) are grouped, and each group of shunt pipes (816) is arranged between two heat conducting rings (811).

5. A roller granulator according to claim 4, characterized in that: A rotating joint (824) is provided between the water outlet of the connecting pipe (821) and the water inlet of the cooling pipe (815), and between the water outlet of the cooling pipe (815) and the water inlet of the return pipe (823). A one-way valve (822) is provided in the water inlet of the water inlet pipe (820) and the water outlet of the connecting pipe (821). The two one-way valves (822) are installed in opposite directions.

6. A roller granulator according to claim 1, characterized in that: A motor bracket (805) fixedly connected to the stepper motor (803) is fixedly arranged on the base (1); a transmission assembly between the stepper motor (803) and the fixed plate (827) comprises a first rotating plate (828); the first rotating plate (828) is fixedly arranged at the front end of the output shaft of the stepper motor (803); and a rotating long plate (830) is rotatably connected to the end of the first rotating plate (828) away from the stepper motor (803) via a movable shaft.

7. A roller granulator according to claim 6, characterized in that: The end of the rotating long plate (830) away from the first rotating plate (828) is rotatably connected to the second rotating plate (829) via a movable shaft, and two meshing gears (831) are fixedly provided at the front ends of the two movable shafts. A rotating shaft (832) is rotatably provided at the end of the second rotating plate (829) close to the first rotating plate (828), and a connecting frame (833) is fixedly sleeved on the rotating shaft (832), and the front end bottom of the connecting frame (833) is fixedly connected to the fixed plate (827).

8. A roller granulator according to claim 1, characterized in that: The box body (2) is provided with a material guide chamber (201), a granulation chamber (202) and a screening chamber (203), respectively; the bottom of the spiral feeder (3) penetrates the box body (2) and extends into the material guide chamber (201); a support frame (12) for fixing the spiral feeder (3) is fixedly provided on the box body (2); a material feed drive (13) for driving the spiral feeder (3) is fixedly provided on the support frame (12); and a material feed feeder (203) is connected to the spiral feeder (3). The active roller pressing cylinder (4) and the driven roller pressing cylinder (5) are arranged in a granulating chamber (202); a transmission gear assembly (7) is arranged between two roller shafts (6) at the front ends of the active roller pressing cylinder (4) and the driven roller pressing cylinder (5); a discharge pipe (11) connected to the screening chamber (203) is fixedly arranged on the box body (2); a flow guide seat (204) is arranged in the screening chamber (203); and a driving groove (205) is opened at one end of the box body (2).

9. A roller granulator according to claim 8, characterized in that: The screening mechanism (9) comprises a screening plate (901) arranged in a screening chamber (203), one end of the screening plate (901) being hingedly arranged with the screening chamber (203), a slide groove (903) communicating with the screening chamber (203) being provided in the driving groove (205), a sliding rod (904) being fixedly arranged in the slide groove (903), a sliding block (902) being slidably connected to the sliding block (904) and being fixedly connected to the other end of the screening plate (901), a spring (905) being sleeved on the sliding block (904) and being fixedly arranged between the sliding block (902) and the slide groove (903), a connecting plate (906) being fixedly arranged at one end of the sliding block (902), a servo motor (907) being fixedly arranged in the driving groove (205), and a cam (908) being intermittently in contact with the connecting plate (906) being fixedly arranged on the output shaft of the servo motor (907).

10. A method for operating a roller granulator, referring to the roller granulator according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: feeding the material into the spiral feeder (3) through the feed pipe (10), and the material evenly falls into the box body (2), and then is introduced into the granulation chamber (202) through the material guide chamber (201); Step 2: Control the stepping motor (803) to operate so that the active roller pressing cylinder (4) and the driven roller pressing cylinder (5) extrude and granulate the material. When the active roller pressing cylinder (4) and the driven roller pressing cylinder (5) are operating, the heat dissipation mechanism (8) dissipates heat and cools the active roller pressing cylinder (4) and the driven roller pressing cylinder (5); Step 3: The extruded material particles fall onto the screening plate (901) in the screening chamber (203), and the servo motor (907) is controlled to make the screening plate (901) vibrate and screen the material particles to prevent the material particles from accumulating and blocking the screen holes. The material particles then pass through the screening plate (901) and fall onto the guide seat (204) and are discharged through the discharge pipe (11).

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