A roller compactor and its working method

Abstract

The present invention discloses a roller compactor and its working method, which relates to the technical field of roller compactors, and includes a base, a box body, a screw feeder, a driving roller cylinder, a driven roller cylinder and a roller shaft. A heat dissipation mechanism is arranged in the driving roller cylinder and the driven roller cylinder. It has strong practicability. When the hollow rods in the driving roller cylinder and the driven roller cylinder rotate, they drive the driving gear ring to rotate. The driving gear ring drives the driven gear ring meshed with it to rotate. The driven gear ring drives the fan blades on the rotating rod to rotate. When the fan blades rotate, the outside cold air is filtered by the dust-proof ventilation net and enters the driving roller cylinder and the driven roller cylinder from the rear roller shaft. The cold air flowing in the roller cylinder can absorb the heat inside the roller cylinder, and then is transferred to the outside air through the dust-proof 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 temperature inside the roller cylinder.

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:

[0008] A roller compactor granulator, comprising a base, a box body, a spiral feeder, a driving roller cylinder, a driven roller cylinder and a roller shaft. A heat dissipation mechanism is arranged in the driving roller cylinder and the driven roller cylinder, and a material screening mechanism is arranged in the box body; the heat dissipation mechanism includes a hollow rod and a stepping motor arranged in the driving roller cylinder and the driven roller cylinder. A belt transmission assembly is arranged between the rear end of the hollow rod in the driving roller cylinder and the output rod of the stepping motor. Connecting brackets fixedly sleeved with the roller shaft are fixedly sleeved at both the front and rear ends of the hollow rod. A rotating rod is rotatably arranged between the connecting brackets at both ends. An active gear ring is fixedly sleeved on the hollow rod, and a driven gear ring meshed with the active gear ring is fixedly sleeved on the rotating rod. Fan blades are fixedly sleeved at both the front and rear ends of the rotating rod; a fixed ring is fixedly sleeved on the hollow rod, and heat conduction rings are fixedly arranged in both the driving roller cylinder and the driven roller cylinder. A heat conduction plate is fixedly connected between the heat conduction ring and the fixed ring, and a plurality of heat conduction fins are fixedly arranged on the heat conduction plate; a plurality of cooling pipes are arranged in the hollow rod, and a shunt pipe is communicated between the plurality of cooling pipes. The shunt pipe extends through the hollow rod and then extends into the hollow rod again to be communicated with the rear end cooling pipe. A cooling water tank is fixedly arranged on the base. Cylinders are arranged at both ends of the box body. A water inlet pipe is communicated between the bottom of the cylinder and the cooling water tank. A connecting pipe is arranged between the cooling pipe and the cylinder, and a return pipe is arranged between the cooling pipe and the cooling water tank. A piston is hermetically and slidably connected in the cylinder. A connecting rod is fixedly arranged on the piston. The top of the connecting rod slidably penetrates through the cylinder and is fixedly connected with a fixing plate. A transmission assembly is arranged between the stepping motor and the fixing plate.

[0009] According to the above technical solution, a total of four rotating rods are provided. The four rotating rods are annularly arranged on the connecting brackets with the hollow rod as the axis. The rear roller shaft is the air inlet end, and the front roller shaft is the air outlet end. A dust-proof ventilation net is fixedly arranged in the gap between the connecting bracket and the roller shaft. 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 roller shaft.

[0010] According to the above technical solution, a plurality of heat conduction rings are provided. The plurality of heat conduction rings are evenly spaced in the driving roller cylinder and the driven roller cylinder. A plurality of heat conduction plates connected between the heat conduction ring and the fixed ring are provided. The plurality of heat conduction plates are annularly arranged between the fixed ring and the heat conduction ring with the fixed ring as the axis.

[0011] According to the above technical solution, a water injection pipe is connected to the cooling water tank. A liquid level observation window is provided on one side of the cooling water tank. Fixed seats fixedly connected to the two cylinders are provided at both ends of the box body. A plurality of shunt pipes communicating between the plurality of cooling pipes are provided. The plurality of shunt pipes are arranged between the four rotating rods. The plurality of shunt pipes are in a group, and each group of shunt pipes is arranged between the two heat conduction rings.

[0012] According to the above technical solution, rotary joints are 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. Check valves are 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 check valves are opposite.

[0013] According to the above technical solution, a motor bracket fixedly connected to the stepping motor is fixedly provided on the base. The transmission assembly between the stepping motor and the fixed plate includes a first rotating plate. The first rotating plate is fixedly provided at the front end of the output shaft of the stepping motor. A rotating long plate is rotatably connected to the end of the first rotating plate away from the stepping motor through a movable shaft.

[0014] According to the above technical solution, a second rotating plate is rotatably connected to the end of the rotating long plate away from the first rotating plate through a movable shaft. Two gears meshing with each other are fixedly provided at the front ends of the two movable shafts. A rotating shaft is rotatably provided at the end of the second rotating plate close to the first rotating plate. A connecting frame is fixedly sleeved on the rotating shaft. The bottom of the front end of the connecting frame is fixedly connected to the fixed plate.

[0015] According to the above technical solution, a material guiding chamber, a granulating chamber and a screening chamber are respectively provided in the box body. The bottom of the spiral feeder penetrates through 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 feeding drive motor for driving the spiral feeder is fixedly provided on the support frame. A feeding pipe is communicated with the spiral feeder. The driving roller and the driven roller are arranged in the granulating chamber. A transmission gear assembly is arranged between the two roller shafts at the front ends of the driving roller and the driven roller. A discharge pipe communicated with the screening chamber is fixedly provided on the box body. A diversion seat is arranged in the screening chamber. A driving groove is provided at one end of the box body.

[0016] According to the above technical solution, the screening mechanism includes a screening plate disposed in the screening chamber. One end of the screening plate is hinged to the screening chamber. A chute communicating with the screening chamber is formed in the driving groove. A sliding rod is fixedly disposed in the chute. A slider fixedly connected to the other end of the screening plate is slidably connected to the sliding rod. A spring fixedly disposed between the slider and the chute is sleeved on the sliding rod. One end of the slider is fixedly provided with a connecting plate. A servo motor is fixedly disposed in the driving groove. A cam that intermittently contacts the connecting plate is fixedly disposed on the output shaft of the servo motor.

[0017] Based on the above-mentioned roller compactor, the present invention also provides a working method for a roller compactor, including the following steps:

[0018] Step 1: Put the material into the spiral feeder through the feeding pipe. The material evenly falls into the box and then is introduced into the granulating chamber through the guiding chamber.

[0019] Step 2: Control the stepping motor to work so that the active roller pressing cylinder and the driven roller pressing cylinder extrude and granulate the material. When the active roller pressing cylinder and the driven roller pressing cylinder are working, the heat dissipation mechanism dissipates heat and cools the active roller pressing cylinder and the driven roller pressing cylinder.

[0020] Step 3: The extruded material particles fall onto the screening plate in the screening chamber. Control the servo motor to vibrate and screen the material particles by the screening plate to prevent the material particles from accumulating and blocking the screen holes. Then the material particles fall onto the diversion seat through the screening plate and are discharged through the discharge pipe.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. In the present invention, when the hollow rods in the active roller pressing cylinder and the driven roller pressing cylinder rotate, they drive the active gear ring to rotate. The active gear ring drives the driven gear ring engaged with it to rotate. The driven gear ring drives the fan blades on the rotating rod to rotate. When the fan blades rotate, the outside cold air is filtered by the dust-proof ventilation net and enters the active roller pressing cylinder and the driven roller pressing cylinder from the rear roller shaft. The cold air flowing in the roller pressing cylinder can absorb the heat inside the roller pressing cylinder and then is transferred to the outside air through the dust-proof ventilation net of the front roller shaft, so that the heat inside the roller pressing cylinder can be quickly dissipated, thereby achieving the purpose of reducing the temperature inside the roller pressing cylinder.

[0023] 2. In the present invention, through the setting of the heat conduction ring, the surface heat of the active roller pressing cylinder and the driven roller pressing cylinder can be transferred to the heat conduction ring and then to the heat conduction plate. The multiple heat conduction fins provided on the heat conduction plate can disperse and absorb the heat. Then the airflow introduced by the fan blades dissipates the heat of the heat conduction fins, improving the heat dissipation effect on the active roller pressing cylinder and the driven roller pressing cylinder, thereby achieving the acceleration of the heat dissipation inside the active roller pressing cylinder and the driven roller pressing cylinder and improving the cooling efficiency.

[0024] 3. In the present invention, when the stepping motor rotates, the connecting frame can drive the connecting rod to move up and down through the fixing plate, enabling the piston to reciprocate up and down in the cylinder body. As a result, the cooling water in the cooling water tank can be continuously sucked into the cylinder body and then squeezed into the connecting pipe. The cooling water is transported through the connecting pipe to the cooling pipe inside the hollow rod. Under the action of the cooling pipe and the shunt pipe that is connected to the cooling pipe and extends out of the hollow rod, the heat inside the roller press cylinder and on the heat conducting fins can be absorbed by the cooling water. The cooling water that has absorbed the heat continues to flow and re-enters the cooling water tank through the return pipe to be cooled again, enabling the cooling water to achieve circulating cooling of the roller press cylinder, further improving the cooling efficiency and heat dissipation effect of the roller press cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention.

[0026] In the drawings:

[0027] Figure 1 is the front perspective view of the three-dimensional structure of a roller granulator in the embodiment of the present invention;

[0028] Figure 2 is the rear perspective view of the three-dimensional structure of a roller granulator in the embodiment of the present invention;

[0029] Figure 3 is the schematic cross-sectional view of the box body in the embodiment of the present invention;

[0030] Figure 4 is the perspective view of the three-dimensional structure of the heat dissipation mechanism in the embodiment of the present invention;

[0031] Figure 5 is the perspective view of the three-dimensional structure of the active roller press cylinder and the driven roller press cylinder in the embodiment of the present invention;

[0032] Figure 6 is the cross-sectional view of the active roller press cylinder in the embodiment of the present invention;

[0033] Figure 7 is the perspective view of the three-dimensional structure of the heat conducting ring in the embodiment of the present invention;

[0034] Figure 8 is the cross-sectional view of the cylinder body in the embodiment of the present invention;

[0035] Figure 9 is the perspective view of the three-dimensional structure of the screening mechanism in the embodiment of the present invention;

[0036] Figure 10 is in the embodiment of the present invention Figure 9 the enlarged view of the structure at A.

[0037] In the figure: 1, base; 2, box body; 201, material guiding chamber; 202, granulating chamber; 203, material screening chamber; 204, diversion 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, stepper motor; 804, belt drive assembly; 805, motor bracket; 806, dust-proof ventilation net; 807, rotating rod; 808, active gear ring; 809, driven gear ring; 810, fan blade; 811, heat conducting ring; 812, fixing ring; 813, heat conducting plate; 814, heat conducting fin; 815, cooling pipe; 816, shunt pipe; 817, cooling water tank; 818, fixing seat; 819, cylinder body; 820, water inlet pipe; 821, connecting pipe; 822, check valve; 823, return pipe; 824, rotary joint; 825, piston; 826, connecting rod; 827, fixing plate; 828, first rotating plate; 829, second rotating plate; 830, rotating long plate; 831, gear; 832, rotating shaft; 833, connecting frame; 9, material screening mechanism; 901, screening plate; 902, slider; 903, chute; 904, sliding rod; 905, spring; 906, connecting plate; 907, servo motor; 908, cam; 10, feeding pipe; 11, discharging pipe; 12, support frame; 13, feeding drive motor. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the specification drawings and specific embodiments.

[0040] Example 1: In combination with Figures 1 - 10, the present invention provides a technical solution: a roll granulator, including a base 1, a box body 2, a screw feeder 3, a driving roll cylinder 4, a driven roll cylinder 5 and a roll cylinder shaft 6. A material guiding chamber 201, a granulating chamber 202 and a screening chamber 203 are respectively arranged in the box body 2. The bottom of the screw feeder 3 penetrates 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 arranged on the box body 2, and a feeding driving machine 13 for driving the screw feeder 3 is fixedly arranged on the support frame 12. A feeding pipe 10 is communicated with the screw feeder 3. The driving roll cylinder 4 and the driven roll cylinder 5 are arranged in the granulating chamber 202. A transmission gear assembly 7 is arranged between the two roll cylinder shafts 6 at the front ends of the driving roll cylinder 4 and the driven roll cylinder 5. A discharge pipe 11 communicated with the screening chamber 203 is fixedly arranged on the box body 2. A diversion seat 204 is arranged in the screening chamber 203. A driving groove 205 is arranged at one end of the box body 2. A heat dissipation mechanism 8 is arranged in the driving roll cylinder 4 and the driven roll cylinder 5. A screening mechanism 9 is arranged in the box body 2.

[0041] Specifically, control the feeding driving machine 13 to make the screw feeder 3 start to work. Put the material into the screw feeder 3 through the feeding pipe 10. The material evenly falls into the box body 2 and then is introduced into the granulating chamber 202 through the material guiding chamber 201.

[0042] Refer to Figures 4 - 6 , and further obtain that the heat dissipation mechanism 8 includes a hollow rod 801 and a stepping motor 803 arranged in the driving roll cylinder 4 and the driven roll cylinder 5. A belt transmission assembly 804 is arranged between the rear end of the hollow rod 801 in the driving roll cylinder 4 and the output rod of the stepping motor 803. Connecting brackets 802 fixedly sleeved with the roll cylinder shaft 6 are respectively arranged at the front and rear ends of the hollow rod 801. A rotating rod 807 is rotatably arranged between the connecting brackets 802 at the front and rear ends. An active gear ring 808 is fixedly sleeved on the hollow rod 801. A driven gear ring 809 meshed with the active gear ring 808 is fixedly sleeved on the rotating rod 807. Fan blades 810 are fixedly sleeved at the front and rear ends of the rotating rod 807. There are four rotating rods 807 in total. The four rotating rods 807 are annularly arranged on the connecting bracket 802 with the hollow rod 801 as the axis. The rear roll cylinder shaft 6 is the air inlet end, and the front roll cylinder shaft 6 is the air outlet end. A dust-proof ventilation net 806 is fixedly arranged in the gap between the connecting bracket 802 and the roll cylinder shaft 6. Two groups of fan blades 810 are respectively arranged in the two roll cylinder shafts 6. The active gear ring 808 and the driven gear ring 809 are both arranged in the rear roll cylinder shaft 6.

[0043] Specifically, the stepping motor 803 is controlled to operate, so that the hollow rod 801 drives the active roller 4 to rotate through the connecting bracket 802. Under the driving action of the transmission gear assembly 7, the driven roller 5 rotates in the opposite direction to the active roller 4, and the material is extruded and granulated by the active roller 4 and the driven roller 5. When the hollow rod 801 in the active roller 4 and the driven roller 5 rotates, it drives the active gear ring 808 to rotate. The active gear ring 808 drives the driven gear ring 809 engaged with it to rotate, and the driven gear ring 809 drives the fan blade 810 on the rotating rod 807 to rotate. When the fan blade 810 rotates, the outside cold air is filtered by the dust-proof ventilation net 806 and enters the active roller 4 and the driven roller 5 from the rear roller shaft 6. The cold air flowing in the roller can absorb the heat inside the roller, and then is transferred to the outside air through the dust-proof ventilation net 806 of the front roller shaft 6, so that the heat inside the roller can be quickly dissipated, and the purpose of reducing the temperature inside the roller is achieved.

[0044] Refer to Figure 6 and Figure 7 , it is further obtained that a fixed ring 812 is fixedly sleeved on the hollow rod 801, and heat conduction rings 811 are fixedly arranged in both the active roller 4 and the driven roller 5. A heat conduction plate 813 is fixedly connected between the heat conduction ring 811 and the fixed ring 812, and a plurality of heat conduction fins 814 are fixedly arranged on the heat conduction plate 813. There are a plurality of heat conduction rings 811, and the plurality of heat conduction rings 811 are evenly spaced in the active roller 4 and the driven roller 5. A plurality of heat conduction plates 813 connecting the heat conduction ring 811 and the fixed ring 812 are provided, and the plurality of heat conduction plates 813 are annularly arrayed between the fixed ring 812 and the heat conduction ring 811 with the fixed ring 812 as the axis.

[0045] Specifically, through the setting of the heat conduction ring 811, the surface heat of the active roller 4 and the driven roller 5 can be transferred to the heat conduction ring 811, and then to the heat conduction plate 813. The plurality of heat conduction fins 814 arranged on the heat conduction plate 813 can disperse and absorb the heat, and then the air flow introduced by the fan blade 810 dissipates the heat conduction fins 814, improving the heat dissipation effect on the active roller 4 and the driven roller 5, so as to accelerate the heat dissipation inside the active roller 4 and the driven roller 5 and improve the cooling efficiency.

[0046] Refer to Figure 8, it is further obtained that a plurality of cooling pipes 815 are arranged inside the hollow rod 801, a flow dividing pipe 816 is connected and arranged between the plurality of cooling pipes 815, the flow dividing pipe 816 penetrates through the hollow rod 801 and then extends into the hollow rod 801 again to be connected with the rear-end cooling pipe 815. A cooling water tank 817 is fixedly arranged on the base 1. Cylinders 819 are arranged at both ends of the box body 2. A water inlet pipe 820 is connected and 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. A piston 825 is hermetically and slidably connected inside the cylinder 819. A connecting rod 826 is fixedly arranged on the piston 825. The top of the connecting rod 826 slidably penetrates 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 arranged on one side of the cooling water tank 817. Fixing seats 818 fixedly connected with the two cylinders 819 are fixedly arranged at both ends of the box body 2. A plurality of flow dividing pipes 816 communicating between the plurality of cooling pipes 815 are arranged. The plurality of flow dividing pipes 816 are arranged between the four rotating rods 807. The plurality of flow dividing pipes 816 are in a group, and each group of flow dividing pipes 816 is arranged between the two heat conducting rings 811. Rotary joints 824 are 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. Check valves 822 are arranged inside the water inlet of the water inlet pipe 820 and the water outlet of the connecting pipe 821. The installation directions of the two check valves 822 are opposite. A motor bracket 805 fixedly connected with the stepping motor 803 is fixedly arranged on the base 1. The transmission assembly between the stepping motor 803 and the fixing plate 827 includes a first rotating plate 828. The first rotating plate 828 is fixedly arranged at the front end of the output shaft of the stepping motor 803. One end of the first rotating plate 828 away from the stepping motor 803 is rotatably connected with a rotating long plate 830 through a movable shaft. One end of the rotating long plate 830 away from the first rotating plate 828 is rotatably connected with a second rotating plate 829 through a movable shaft. Two meshing gears 831 are fixedly arranged at the front ends of the two movable shafts. A rotating shaft 832 is rotatably arranged at one 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 bottom of the front end of the connecting frame 833 is fixedly connected with the fixing plate 827.

[0047] Specifically, when the stepper motor 803 rotates, it drives the first rotating plate 828 to rotate. 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 driving action of 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 remain meshed and make an elliptical circular motion with the center point of the rotating long plate 830 as the center, so that the lower end of the second rotating plate 829 can drive the connecting frame 833 to make a reciprocating up and down motion through the rotating shaft 832 when rotating. The connecting frame 833 drives the connecting rod 826 to move up and down through the fixing plate 827, so that the piston 825 can make a reciprocating up and down motion in the cylinder body 819. When the piston 825 moves upward, a negative pressure is generated inside the cylinder body 819, so that the cooling water in the cooling water tank 817 can be sucked into the cylinder body 819 through the water inlet pipe 820. When the piston 825 moves downward, the pressure in the cylinder body 819 increases, so that the cooling water can be squeezed into the connecting pipe 821. The one-way valves 822 provided 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 that is communicated with the cooling pipe 815 and extends out of the hollow rod 801, the heat on the inside of the roller pressing cylinder and the heat conducting fins 814 can be absorbed by the cooling water. The cooling water that has absorbed the heat continues to flow and flows back into the cooling water tank 817 again through the return pipe 823 for cooling again, so that the cooling water can realize the circulating cooling of the roller pressing cylinder, further improving the cooling efficiency and heat dissipation effect of the roller pressing cylinder. Through the setting of the rotary joint 824, the connecting pipe 821 will not rotate with the cooling pipe 815.

[0048] Embodiment 2: Refer to Figure 9 and Figure 10 On the basis of Embodiment 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 sliding groove 903 communicating with the screening chamber 203 is opened in the driving groove 205. A sliding rod 904 is fixedly arranged in the sliding groove 903. A slider 902 fixedly connected to the other end of the screening plate 901 is slidably connected to the sliding rod 904. A spring 905 fixedly arranged between the slider 902 and the sliding groove 903 is sleeved on the sliding rod 904. One end of the slider 902 is fixedly provided with a connecting plate 906. A servo motor 907 is fixedly arranged in the driving groove 205. A cam 908 that is intermittently in contact with the connecting plate 906 is fixedly arranged on the output shaft of the servo motor 907.

[0049] Specifically, the material particles extruded into pellets by the active roller 4 and the driven roller 5 fall onto the sieve plate 901 in the sieve chamber 203. The servo motor 907 is controlled to drive the cam 908 to rotate. When the cam 908 rotates, it 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 chute 903. Under the action of the spring 905, when the cam 908 is not in contact with the connecting plate 906, the slider 902 is driven to reset, so that one end of the sieve plate 901 can vibrate up and down, and then the material particles can be vibrated and sieved, preventing the material particles from falling too fast and piling up to cause the sieve holes to be blocked. After that, the material particles fall onto the diversion seat 204 through the sieve plate 901 and are discharged through the discharge pipe 11.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 should not be construed as limiting the protection scope of the present invention.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A roller compactor, comprising a base (1), a box body (2), a spiral feeder (3), a driving roller cylinder (4), a driven roller cylinder (5) and a roller shaft (6), characterized in that: A heat dissipation mechanism (8) is arranged inside the active roller pressing cylinder (4) and the driven roller pressing cylinder (5), and a material screening mechanism (9) is arranged inside the box body (2). The heat dissipation mechanism (8) includes a hollow rod (801) and a stepping motor (803) arranged inside the active roller pressing cylinder (4) and the driven roller pressing cylinder (5). A belt transmission assembly (804) is arranged between the rear end of the hollow rod (801) inside the active roller pressing cylinder (4) and the output rod of the stepping motor (803). Connecting brackets (802) fixedly sleeved with and fixedly connected to the roller shaft (6) are arranged at both the front and rear ends of the hollow rod (801). A rotating rod (807) is rotatably arranged between the connecting brackets (802) at both ends. An active gear ring (808) is fixedly sleeved on the hollow rod (801), and a driven gear ring (809) meshed with the active gear ring (808) is fixedly sleeved on the rotating rod (807). Fan blades (810) are fixedly sleeved at both the front and rear ends of the rotating rod (807). A fixing ring (812) is fixedly sleeved on the hollow rod (801). Heat conducting rings (811) are fixedly arranged inside both the active roller pressing cylinder (4) and the driven roller pressing cylinder (5). Heat conducting plates (813) are fixedly connected between the heat conducting rings (811) and the fixing ring (812). A plurality of heat conducting fins (814) are fixedly arranged on the heat conducting plates (813). A plurality of cooling pipes (815) are arranged inside the hollow rod (801). A shunt pipe (816) is arranged for communicating between the plurality of cooling pipes (815). The shunt pipe (816) penetrates through the hollow rod (801) and then extends into the hollow rod (801) again to communicate with the rear end cooling pipe (815). A cooling water tank (817) is fixedly arranged on the base (1). Cylinders (819) are arranged at both ends of the box body (2). A water inlet pipe (820) is arranged for communicating 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). A piston (825) is hermetically and slidably connected inside the cylinder (819). A connecting rod (826) is fixedly arranged on the piston (825). The top of the connecting rod (826) slidably penetrates through the cylinder (819) and is fixedly connected to a fixing plate (827). A transmission assembly is arranged between the stepping motor (803) and the fixing plate (827).

2. The roller compactor according to claim 1, wherein: There are four rotating rods (807) in total. 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 roller shaft (6) is the air inlet end, and the front roller shaft (6) is the air outlet end. A dust-proof ventilation net (806) is fixedly arranged in the gap between the connecting bracket (802) and the roller shaft (6). Two groups of fan blades (810) are respectively arranged in two roller shafts (6). The driving gear ring (808) and the driven gear ring (809) are both arranged in the rear roller shaft (6).

3. A roller compactor according to claim 1, characterized in that: There are multiple heat-conducting rings (811). The multiple heat-conducting rings (811) are evenly spaced and arranged in the driving roller (4) and the driven roller (5). There are multiple heat-conducting plates (813) connecting the heat-conducting rings (811) and the fixed ring (812). The multiple heat-conducting plates (813) are arranged in a circular array between the fixed ring (812) and the heat-conducting rings (811) with the fixed ring (812) as the axis.

4. A roller compactor according to claim 1, wherein: A water injection pipe is communicated with the cooling water tank (817). A liquid level observation window is opened on one side of the cooling water tank (817). Fixed seats (818) fixedly connected to two cylinders (819) are fixedly arranged at both ends of the box body (2). There are multiple shunt pipes (816) communicating between multiple cooling pipes (815). The multiple shunt pipes (816) are arranged between the four rotating rods (807). The multiple shunt pipes (816) form a group, and each group of shunt pipes (816) is arranged between two heat-conducting rings (811).

5. A roller compactor according to claim 4, wherein: Rotary joints (824) are 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). Check valves (822) are 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 check valves (822) are opposite.

6. The roller compactor according to claim 1, characterized in that: A motor bracket (805) fixedly connected to the stepping motor (803) is fixedly arranged on the base (1). The transmission component between the stepping motor (803) and the fixing plate (827) includes a first rotating plate (828). The first rotating plate (828) is fixedly arranged at the front end of the output shaft of the stepping motor (803). A rotating long plate (830) is rotatably connected to the end of the first rotating plate (828) away from the stepping motor (803) through a movable shaft.

7. A roller compactor according to claim 6, characterized in that: A second rotating plate (829) is rotatably connected to the end of the rotating long plate (830) away from the first rotating plate (828) through a movable shaft. Two meshing gears (831) are fixedly arranged at the front ends of the two movable shafts. A rotating shaft (832) is rotatably arranged at 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 bottom of the front end of the connecting frame (833) is fixedly connected to the fixing plate (827).

8. A roller compactor according to claim 1, characterized in that: A material guiding chamber (201), a granulating chamber (202) and a material screening chamber (203) are respectively formed inside the box body (2). The bottom of the spiral feeder (3) penetrates through the box body (2) and extends into the material guiding chamber (201). A support frame (12) for fixing the spiral feeder (3) is fixedly arranged on the box body (2). A feeding driving machine (13) for driving the spiral feeder (3) is fixedly arranged on the support frame (12). A feeding pipe (10) is communicated with the spiral feeder (3). The driving roller (4) and the driven roller (5) are arranged inside the granulating chamber (202). A transmission gear assembly (7) is arranged in a transmission manner between two roller shafts (6) at the front ends of the driving roller (4) and the driven roller (5). A discharge pipe (11) communicated with the material screening chamber (203) is fixedly arranged on the box body (2). A diversion seat (204) is arranged inside the material screening chamber (203). A driving groove (205) is formed at one end of the box body (2).

9. The roller compactor according to claim 8, wherein: The material screening mechanism (9) includes a material screening plate (901) arranged inside the material screening chamber (203). One end of the material screening plate (901) is hinged to the material screening chamber (203). A sliding groove (903) communicated with the material screening chamber (203) is formed inside the driving groove (205). A sliding rod (904) is fixedly arranged inside the sliding groove (903). A sliding block (902) fixedly connected to the other end of the material screening plate (901) is slidably connected to the sliding rod (904). A spring (905) fixedly arranged between the sliding block (902) and the sliding groove (903) is sleeved on the sliding rod (904). One end of the sliding block (902) is fixedly provided with a connecting plate (906). A servo motor (907) is fixedly arranged inside the driving groove (205). A cam (908) in intermittent contact with the connecting plate (906) is fixedly arranged on the output shaft of the servo motor (907).

10. A working method of a roller compactor granulator, referring to a roller compactor granulator according to any one of claims 1-9, characterized in that: including the following steps: Step 1: Put the material into the spiral feeder (3) through the feeding pipe (10). The material uniformly falls into the box body (2), and then is guided into the granulating chamber (202) through the material guiding chamber (201). Step 2: Control the stepping motor (803) to work so that the driving roller (4) and the driven roller (5) extrude the material to granulate. When the driving roller (4) and the driven roller (5) are working, the heat dissipation mechanism (8) dissipates heat and cools the driving roller (4) and the driven roller (5). Step 3: The extruded material particles fall onto the material screening plate (901) inside the material screening chamber (203). Control the servo motor (907) to vibrate and screen the material particles by the material screening plate (901) to prevent the material particles from accumulating and blocking the sieve holes. Then the material particles fall onto the diversion seat (204) through the material screening plate (901) and are discharged through the discharge pipe (11).

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