Centrifugal granulation device

Abstract

The utility model relates to the technical field of pelletizers, and discloses a centrifugal pelletizing device which comprises a bottom frame, a shell and an upper cover, the shell is erected on the bottom frame, the upper cover covers the upper end of the shell, an air inlet and an air outlet are formed in one side of the shell, a centrifugal pelletizing assembly and a cooling assembly are further arranged in the shell, and the centrifugal pelletizing assembly and the cooling assembly are arranged in the shell. The centrifugal granulation assembly is arranged in the center of the shell and communicated with a feeding port formed in the upper cover, the cooling assembly is coaxially arranged on the periphery of the centrifugal granulation assembly in a surrounding mode, the cooling assembly is connected with the circulating cooling device through an air inlet and an air outlet, a material receiving hopper is arranged at the bottom of the shell, and a material receiving assembly communicated with the material receiving hopper is further arranged on one side of the material receiving hopper. The problems that an existing granulation device is not easy to granulate resin with low viscosity and poor in granulation effect are mainly solved.

Description

Technical Field

[0001] The utility model relates to the technical field of granulators, in particular to a centrifugal granulation device. Background Art

[0002] Resin is a widely used material for the manufacture of various plastic products. In the production process of resin, a granulator is a device that makes powdery materials into granular materials with different particle sizes for easy packaging and use. In the process of plastic granulation, the formation of plastic particles generally involves the material passing through an extrusion die and then being cut and crushed by a cutting device to form granular particles; for example, CN220614606U discloses a plastic granulation device, which effectively improves the granulation efficiency.

[0003] However, the above granulation device is suitable for granulating resins with high viscosity. There are still the following deficiencies in granulating resins with low viscosity: during molding and cooling, generally, a cooling device blows cold air directly at the material, and the molded material is not cooled sufficiently, and energy consumption is wasted; and after cooling, it needs to be pulverized. When pulverizing, if the speed is low, it is difficult to form small granular particles, and if the speed is high, heat is easily generated, resulting in softening of the resin and making it difficult to pulverize, and it adheres to the pulverizing tool, resulting in inability to pulverize, with poor granulation effect and affecting the granulation efficiency. Summary of the Utility Model

[0004] In order to overcome the problems raised in the above background art, the utility model provides a centrifugal granulation device, which mainly solves the problems that the existing granulation device is not easy to granulate resins with low viscosity and has poor granulation effect.

[0005] In order to achieve the above object, the utility model adopts the following technical solutions.

[0006] The utility model is a centrifugal granulation device, including: a chassis, a housing, and an upper cover. The housing is mounted on the chassis, the upper cover is covered on the upper end of the housing. One side of the housing is provided with an air inlet and an air outlet. The housing is also provided with a centrifugal granulation component and a cooling component inside. The centrifugal granulation component is arranged at the central position of the housing and communicates with the feed inlet provided on the upper cover. The cooling component is coaxially arranged around the outer periphery of the centrifugal granulation component. The cooling component is connected to a circulating cooling device through the air inlet and the air outlet. A receiving hopper is provided at the bottom of the housing, and a material receiving component communicating with the hopper is also provided on one side of the receiving hopper.

[0007] The centrifugal granulation assembly includes: a rotor, a driving motor, and a screen granulation mechanism. The driving motor is connected to one end of the rotor through a transmission mechanism. The screen granulation mechanism is fixedly arranged at the top of the rotor and is provided with a material receiving inner cavity corresponding to the feed inlet. The cooling assembly includes: a lower air outlet cylinder coaxially arranged corresponding to the air outlet and an upper air guiding cylinder corresponding to the air inlet. Connecting flanges are respectively arranged at the upper and lower ends of the lower air outlet cylinder and the upper air guiding cylinder and are tightly connected to the housing.

[0008] Further improvement lies in that: a plurality of flow guiding grid plates fixed to the connecting flange are arranged at intervals in the middle of the upper air guiding cylinder, and a cooling air inlet channel is formed between two adjacent flow guiding grid plates. A plurality of ventilation holes are arranged on the lower air outlet cylinder.

[0009] Further improvement lies in that: the rotor includes: a main shaft connected to the driving motor, a shaft sleeve sleeved outside the main shaft, and bearings arranged between the shaft sleeve and the main shaft. A bearing gland is also sleeved on the main shaft at the top of the shaft sleeve. One end of the bearing gland abuts against the end face of the top flange of the main shaft, and the other end is connected to the bearing. The top of the main shaft is clamped and fixed with the screen granulation mechanism through an outer pressing plate and an inner pressing plate and rotates together with the main shaft. The bottom end of the shaft sleeve is tightly connected to a connecting plate fixedly arranged on the lower air outlet cylinder.

[0010] Further improvement lies in that: the bearing gland is set as a conical structure.

[0011] Further improvement lies in that: a support connecting rod is further arranged on the upper part of the shaft sleeve. The bottom end of the support connecting rod is connected to a connecting seat built in the lower air outlet cylinder. The connecting seat is set as a conical surface structure with upper and lower openings. The top end of the conical surface structure is fixed to the lower air outlet cylinder, and the lower opening of the conical surface structure is smaller than the upper opening of the receiving hopper.

[0012] Further improvement lies in that: the screen granulation mechanism is composed of a fixing frame and a screen surrounding the outside of the fixing frame. The fixing frame includes: a fixing bottom frame fixed between the outer pressing plate and the inner pressing plate, an upper frame arranged above the fixing bottom frame, and connecting columns connecting the fixing bottom frame and the upper frame. A connecting upper cover is further arranged above the fixing frame, and an opening adapted to the feed inlet is arranged on the connecting upper cover.

[0013] Further improvement lies in that: a separation structure is also fixedly arranged at the center position of the inner bottom surface of the screen granulation mechanism.

[0014] Further improvement lies in that: the separation structure is set as a hemispherical surface structure or a conical surface structure.

[0015] The utility model has the following beneficial effects compared with the prior art:

[0016] In this application, materials enter the screen granulation mechanism through the feed inlet. The driving motor drives the materials in the screen granulation mechanism to rotate at high speed. Under the action of centrifugal force, the materials pass through the screen granulation mechanism to form granular materials of the required size and fly out into the space inner cavity between the screen granulation mechanism and the upper diversion cylinder. At this time, the cooling air entering from the air inlet passes through the upper diversion cylinder and enters the inner cavity to form a vortex wind, which meets the flying formed particles. After sufficiently cooling the particles in the inner cavity, the air then discharges from the lower air outlet cylinder through the air outlet and enters the circulating cooling device for recycling, realizing the cooling of the circulating cold source, reducing the production cost, and improving the production efficiency. The cooled particles fall into the receiving hopper under the action of their own gravity. By setting a material receiving assembly on one side of the receiving hopper, it is convenient to collect and package the particles in the receiving hopper without stopping the machine.

[0017] The device changes the running track of the particles in the inner cavity by setting an upper diversion cylinder communicated with the air inlet, avoiding the particles hitting the upper diversion cylinder and changing the shape of the particles. At the same time, it prolongs the residence time of the particles in the inner cavity and improves the cooling effect.

[0018] By setting a screen granulation mechanism in the shell, under the action of centrifugal force, the materials pass through the screen of the screen granulation mechanism to form particles similar in diameter to the screen holes, completing granulation, and thus realizing a granulation form without temperature rise and adhesion, improving the granulation quality and granulation efficiency. Brief Description of the Drawings

[0019] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model;

[0020] Figure 2 It is the front view of the present utility model;

[0021] Figure 3 It is a perspective view of the shell and its internal structure of the present utility model;

[0022] Figure 4 It is a three-dimensional structure schematic diagram of the centrifugal granulation component and the cooling component of the present utility model;

[0023] Figure 5 It is an exploded view of the cooling component of the present utility model;

[0024] Figure 6 It is a sectional view of the centrifugal granulation component of the present utility model;

[0025] Figure 7 It is an exploded three-dimensional view of the screen granulation mechanism of the present utility model.

[0026] Reference Signs in the Drawings:

[0027] Shell 1, air inlet 11, air outlet 12, material receiving hopper 13, upper cover 2, feed inlet 3, chassis 4, cooling assembly 5, lower air outlet cylinder 51, upper diversion cylinder 52, connecting flange 53, diversion grille 54, centrifugal granulation assembly 6, rotor 61, main shaft 611, shaft sleeve 612, bearing 613, bearing gland 614, outer pressing plate 615, inner pressing plate 616, driving motor 62, screen granulation mechanism 63, connecting column 631, fixed chassis 632, upper frame 633, connecting upper cover 634, screen 635, connecting seat 64, supporting connecting rod 65, connecting plate 66, separation structure 67, material receiving assembly 7. Detailed implementation mode

[0028] To deepen the understanding of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings. This embodiment is only used to explain the present utility model and does not constitute a limitation to the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the combination or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0030] A further detailed description of the present utility model is given below in conjunction with the accompanying drawings and embodiments:

[0031] As Figures 1-7 A centrifugal granulation device of an embodiment is given, including: chassis 4, shell 1 and upper cover 2. The shell 1 is erected on the chassis 4, and the upper cover 2 is covered on the upper end of the shell 1. An air inlet 11 and an air outlet 12 are provided on one side of the shell 1. A centrifugal granulation assembly 6 and a cooling assembly 5 are also provided inside the shell 1. The centrifugal granulation assembly 6 is arranged at the central position of the shell 1 and communicates with the feed inlet 3 provided on the upper cover 2. The cooling assembly 5 is coaxially arranged around the outer periphery of the centrifugal granulation assembly 6. The cooling assembly 5 is connected to a circulating cooling device through the air inlet 11 and the air outlet 12. A material receiving hopper 13 is provided at the bottom of the shell 1, and a material receiving assembly 7 communicating with the hopper 13 is also provided on one side of the material receiving hopper 13; the centrifugal granulation assembly 6 includes: a rotor 61, a driving motor 62 and a screen granulation mechanism 63. The driving motor 62 is connected to one end of the rotor 61 through a transmission mechanism. The screen granulation mechanism 63 is fixedly arranged at the top of the rotor 61 and is provided with a material receiving inner cavity corresponding to the feed inlet 3; the cooling assembly 5 includes: a lower air outlet cylinder 51 corresponding to the air outlet 12 and an upper diversion cylinder 52 corresponding to the air inlet 11 which are coaxially arranged. Connecting flanges 53 are respectively provided at the upper and lower ends of the lower air outlet cylinder 51 and the upper diversion cylinder 52 to be fixedly connected to the shell 1.

[0032] In this application, materials enter the screen granulation mechanism 63 from the feed inlet 3. The driving motor 62 drives the materials in the screen granulation mechanism 63 to rotate at high speed. Under the action of centrifugal force, the materials pass through the screen granulation mechanism 63 to form granular materials of the required size and fly out into the space inner cavity between the screen granulation mechanism 63 and the upper guide cylinder 52. At this time, the cooling air entering from the air inlet 11 passes through the upper guide cylinder 52 and enters the inner cavity to form a vortex wind, which meets the flying formed particles. After fully cooling the particles in the inner cavity, the air then discharges from the lower air outlet cylinder 51 through the air outlet 12 and enters the circulating cooling device for recycling. The cooled particles fall into the receiving hopper 13 under the action of their own gravity. By setting a material collection assembly 7 on one side of the receiving hopper 13, it is convenient to collect and package the particles in the receiving hopper 13 without stopping the machine. The device changes the running track of the particles in the inner cavity by setting the upper guide cylinder 52 communicated with the air inlet 11, avoiding the particles hitting the upper guide cylinder 52 and changing the particle shape. At the same time, it prolongs the residence time of the particles in the inner cavity and improves the cooling effect. By setting the screen granulation mechanism 63 in the housing 1, under the action of centrifugal force, the materials pass through the screen of the screen granulation mechanism 63 to form particles similar in diameter to the screen holes, completing granulation. Furthermore, a granulation form without temperature rise and adhesion is realized, improving the granulation quality and efficiency, and avoiding problems such as the resin with low viscosity being difficult to granulate and insufficient cooling after granulation.

[0033] An optional implementation mode: As Figures 3-5 shown, a plurality of guide grid plates 54 fixed to the connecting flange 53 are arranged at intervals in the middle of the upper guide cylinder 52. Cooling air inlet channels are formed between two adjacent guide grid plates 54. A plurality of ventilation holes are provided on the lower air outlet cylinder 51. The guide grid plates 54 can be divided into several groups with controllable adjustment of the gap size and direction. According to the needs, the wind direction, wind speed and flow rate are adjusted to ensure that the particles formed by centrifugal force are cooled sufficiently and not impacted, thereby ensuring the particle forming quality. At the same time, the split structure is set, which is convenient for disassembly, installation and maintenance.

[0034] An optional implementation mode: As Figure 6As shown in the figure, the rotor 61 includes: a main shaft 611 connected to a drive motor 62, a sleeve 612 sleeved outside the main shaft 611, and a bearing 613 disposed between the sleeve 612 and the main shaft 611. A bearing gland 614 is also sleeved on the main shaft 611 at the top of the sleeve 612. One end of the bearing gland 614 abuts against the top flange end face of the main shaft 611, and the other end is connected to the bearing 613. The top of the main shaft 611 is clamped and fixed together with the screen granulation mechanism 63 at the bottom by an outer pressing plate 615 and an inner pressing plate 616 and rotates with the main shaft 611. The bottom end of the sleeve 612 is fixedly connected to a connecting plate 66 fixed on the lower air outlet cylinder 51. Specifically, one end of the connecting plate 66 is sleeved on the main shaft 611 and is fixedly connected to the bottom flange connecting seat of the sleeve 612. The other end of the connecting plate 66 is fixed to the bottom of the lower air outlet cylinder 51. The drive motor 62 is fixedly connected to the connecting plate 66 through a motor mounting seat; a belt pulley is provided on the output shaft of the drive motor 62, and a matching belt pulley is provided at the bottom of the main shaft 611, and the two are connected by a belt for transmission connection; among them, the connecting plate 66 can be set to be connected to both ends in the diameter direction at the bottom of the lower air outlet cylinder 51 to ensure stable rotation of the main shaft; the bearing gland 614 is set as a conical structure to reduce friction on the top flange of the main shaft and reduce the weight of the rotor; in order to increase the clamping force on the bottom of the screen granulation mechanism 63, an anti-slip structure can be added to the clamping surfaces of the outer pressing plate 615 and the inner pressing plate 616 and the bottom of the screen granulation mechanism 63.

[0035] An alternative embodiment: As Figure 3 , 6 shown in the figure, a support connecting rod 65 is further provided on the upper part of the sleeve 612. The bottom end of the support connecting rod 65 is connected to a connecting seat 64 built in the lower air outlet cylinder 51. The connecting seat 64 is set as a conical surface structure with upper and lower openings. The top of the conical surface structure is fixed to the lower air outlet cylinder 51, and the lower opening of the conical surface structure is smaller than the upper opening of the receiving hopper 13. The setting of the support connecting rod 65 supports the sleeve 612 to reduce shaking and ensure stable rotation of the main shaft. The connecting rod 65 is hingedly and movably connected to the sleeve 612 and the connecting seat 64. The connecting seat 64 can also be set as a plurality of conical connecting plates adapted to the connecting rod 65 and distributed at intervals in the lower air outlet cylinder 51 to support the sleeve 612 to reduce shaking.

[0036] An alternative embodiment: As Figure 6 , 7As shown, the screen granulation mechanism 63 is composed of a fixed frame and a screen 635 surrounding the outside of the fixed frame. The fixed frame includes: a fixed bottom frame 632 fixed between the outer pressing plate 615 and the inner pressing plate 616, an upper frame 633 arranged above the fixed bottom frame 632, and connecting columns 631 connecting the fixed bottom frame 632 and the upper frame 633. A connecting upper cover 634 is also arranged above the fixed frame, and an opening adapted to the feed port 3 is provided on the connecting upper cover 634. Among them, the screen 635 is set as an annular columnar structure, and corresponding annular grooves are provided at the edge of the top surface of the fixed bottom frame 632 and the lower end surface of the connecting upper cover 634 for installing and fixing the screen 635. The size of the upper frame 633 is smaller than that of the fixed bottom frame 632 and the connecting upper cover 634. The fixed frame can be set as an integral structure or a split structure. Among them, the screen 635 and the fixed frame are detachably connected, which is convenient for replacing screens with different pore diameters to meet the manufacture of particles with different particle sizes. At the same time, different lengths of particles can be obtained by adjusting the rotation speed of the driving motor 62.

[0037] An alternative embodiment: As Figure 3 , 4 , 6, and 7 show that a separation structure 67 is also fixedly arranged at the center position of the inner and bottom surfaces of the screen granulation mechanism 63. The separation structure 67 is fixedly arranged at the center position of the inner pressing plate 616. The separation structure 67 is set as a hemispherical structure or a conical structure. The setting of the separation structure 67 with a hemispherical structure enables the material to fall into the screen granulation mechanism 63. Under the action of the hemispherical structure, it flows in all directions respectively, and the centrifugal granulation effect is better.

[0038] The embodiments disclosed in the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention according to the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A centrifugal granulation device, comprising: A base frame (4), a shell (1) and an upper cover (2), wherein the shell (1) is mounted on the base frame (4), the upper cover (2) covers the upper end of the shell (1), and one side of the shell (1) is provided with an air inlet (11) and an air outlet (12). The invention is characterized in that: a centrifugal granulation component (6) and a cooling component (5) are also provided in the shell (1), the centrifugal granulation component (6) is arranged at the center of the shell (1) and is communicated with the feed inlet (3) provided on the upper cover (2), the cooling component (5) is coaxially arranged around the outer periphery of the centrifugal granulation component (6), the cooling component (5) is connected to the circulating cooling device through the air inlet (11) and the air outlet (12), and a receiving hopper (13) is provided at the bottom of the shell (1), and a receiving component (7) communicated with the hopper (13) is also provided on one side of the receiving hopper (13).

2. The centrifugal granulation device according to claim 1, characterized in that: The centrifugal granulation assembly (6) comprises: a rotor (61), a drive motor (62) and a screen granulation mechanism (63), wherein the drive motor (62) is connected to one end of the rotor (61) via a transmission mechanism, and the screen granulation mechanism (63) is fixedly arranged at the top of the rotor (61) and is provided with a material receiving inner cavity corresponding to the feed port (3); the cooling assembly (5) comprises: a coaxially arranged lower air outlet cylinder (51) corresponding to the air outlet (12) and an upper guide cylinder (52) corresponding to the air inlet (11), wherein the upper and lower ends of the lower air outlet cylinder (51) and the upper guide cylinder (52) are respectively provided with connecting flanges (53) which are fixedly connected to the housing (1).

3. The centrifugal granulation device according to claim 2, characterized in that: A plurality of guide gratings (54) fixed to the connecting flange (53) are provided at a middle spacer ring of the upper guide cylinder (52), a cooling air inlet passage is formed between two adjacent guide gratings (54), and a plurality of ventilation holes are provided on the lower air outlet cylinder (51).

4. The centrifugal granulation device according to claim 2, characterized in that: The rotor (61) comprises: a main shaft (611) connected to a driving motor (62), a shaft sleeve (612) sleeved on the outside of the main shaft (611), and a bearing (613) arranged between the shaft sleeve (612) and the main shaft (611); a bearing cover (614) is sleeved on the main shaft (611) at the top end of the shaft sleeve (612); one end of the bearing cover (614) is placed on the top end face of the flange of the main shaft (611), and the other end is connected to the bearing (613); the top of the main shaft (611) is clamped and fixed with the screen granulation mechanism (63) by an outer pressure plate (615) and an inner pressure plate (616) and rotates with the main shaft (611); the bottom end of the shaft sleeve (612) is tightly connected to a connecting plate (66) fixed to the lower air outlet tube (51).

5. The centrifugal granulation device according to claim 4, characterized in that: The bearing pressure cover (614) is configured as a conical structure.

6. The centrifugal granulation device according to claim 4, characterized in that: A supporting connecting rod (65) is also provided on the upper part of the shaft sleeve (612), and the bottom end of the supporting connecting rod (65) is connected to a connecting seat (64) built into the lower air outlet cylinder (51), and the connecting seat (64) is configured as a conical structure with upper and lower openings, and the top end of the conical structure is fixed to the lower air outlet cylinder (51), and the lower opening of the conical structure is smaller than the upper opening of the receiving hopper (13).

7. The centrifugal granulation device according to claim 2 or 6, characterized in that: The screen granulation mechanism (63) is composed of a fixed frame and a screen (635) arranged around the outside of the fixed frame. The fixed frame includes: a fixed base frame (632) fixed between an outer pressure plate (615) and an inner pressure plate (616), an upper frame (633) arranged above the fixed base frame (632), and a connecting column (631) connecting the fixed base frame (632) and the upper frame (633). A connecting upper cover (634) is also arranged above the fixed frame, and an opening adapted to the feed port (3) is arranged on the connecting upper cover (634).

8. The centrifugal granulation device according to claim 7, characterized in that: A separation structure (67) is also fixedly provided inside the screen granulation mechanism (63) at the center of the bottom surface.

9. The centrifugal granulation device according to claim 8, characterized in that: The separation structure (67) is configured as a hemispherical structure or a conical structure.

Images