Strip drying device for plastic granulation processing

Abstract

The utility model relates to a strip material drying device for plastic granulation processing, which comprises a box body and a stand arranged on one side of the box body, the top of the box body is rotatably provided with a plurality of hollow conveying rollers A through a first support in an array mode, the peripheral wall of each conveying roller A is provided with a plurality of water suction ports around the axis of the conveying roller A in an array mode, and the water suction ports are communicated with the box body. The water suction openings extend in the length direction of the conveying roller A and communicate with the interior of the conveying roller A. The water suction ports are evenly distributed in the outer wall of the hollow conveying roller A and are matched with the water suction mechanism arranged in the box body to work, when strips are guided and conveyed on the conveying roller A, water on the outer surfaces of the strips can be sucked into the conveying roller A to be discharged, large water drops on the surfaces of the strips are effectively reduced, the air blowing and drying mechanism works, and the water absorption efficiency is improved. And the strip material passing through the conveying roller B can be blow-dried, a collaborative drying mechanism of firstly absorbing water and then blowing air is adopted, the drying efficiency is high, the drying effect is good, and meanwhile pollution caused by splashing of large-volume water due to direct blowing can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of plastic production and processing technology, specifically to a strip drying device for plastic granulation processing. Background Technology

[0002] Plastic granulation refers to the process of uniformly mixing raw materials (resin, additives, pigments, etc.), heating and melting them through a twin-screw extruder, extruding them into strips through an extruder die, and then cooling and pelletizing them to finally produce modified plastic particles. These particles can be used as base materials to produce various plastic products. With continuous innovation in modification technology, the application of plastics in many fields such as automobiles, home appliances, packaging, medical, and construction will be further expanded.

[0003] During the plastic granulation process, the extruded strips need to be immersed in water for cooling. To prevent moisture from affecting subsequent pelletizing, the surface of the strips must be dried before pelletizing. Currently, drying is mainly done by blowing air. However, the strips removed from the cooling water have a large amount of water adhering to their surface and accumulating into water droplets. Directly using air to dry them can easily cause water droplets to splash, polluting the processing site. At the same time, some water droplets can also splash onto the dried strips, causing secondary pollution. Utility Model Content

[0004] The purpose of this invention is to provide a strip drying device for plastic granulation processing, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A strip drying device for plastic granulation processing includes a box and a frame set on one side of the box. Several conveying rollers A are rotatably mounted on the top of the box via a first support array. Each conveying roller A is hollow. Several water suction ports are arranged in an array around its axis on the outer peripheral wall of each conveying roller A. The water suction ports extend along the length of the conveying roller A and communicate with the interior of the conveying roller A.

[0007] The box is equipped with a water absorption mechanism, which is connected to the inside of the conveyor roller A. The water absorption mechanism is used to draw water droplets from the surface of the strip into the conveyor roller A. Several conveyor rollers B are mounted on the top of the frame in an array-like manner via a second bracket. The box and the frame are equipped with a blowing and drying mechanism, which is used to blow and dry the strip passing through the conveyor rollers B.

[0008] Furthermore, the water suction mechanism includes a centrifugal fan, a water suction pipe, a main pipe, branch pipes A, and a rotating sleeve. The centrifugal fan is installed inside the housing. The air inlet of the centrifugal fan is connected to the water suction pipe. The other end of the water suction pipe extends to the outside of the housing and is connected to the main pipe. The main pipe is connected to several branch pipes A. One end of each conveying roller A is rotatably equipped with a rotating sleeve, which is connected to the conveying roller A. Each branch pipe A is fixedly connected to the rotating sleeve in a corresponding manner.

[0009] Furthermore, the outlet of the centrifugal fan is connected to an exhaust pipe, which extends through to the outside of the housing.

[0010] Furthermore, a partition is fixed inside the box to divide the box into upper and lower chambers. The centrifugal fan is fixed on the upper surface of the partition, and the motor of the centrifugal fan extends through into the lower chamber.

[0011] Furthermore, the blowing drying mechanism includes a sleeve body, an axial flow fan, a guide pipe, branch pipes B, and a blower. One end of the sleeve body is connected to the side of the box and communicates with the lower cavity. The other end is connected to the guide pipe. The axial flow fan is installed in the sleeve body and is used to draw air from the lower cavity of the box body into the guide pipe. Several branch pipes B are connected to the guide pipe.

[0012] The second support is equipped with blow rods mounted on the mounting bracket. The blow rods correspond one-to-one with the positions of the conveyor roller B. Each blow rod is hollow and has an air outlet on its outer peripheral wall that faces downwards and directly towards the conveyor roller B. The air outlets extend along the length of the conveyor roller B. Each branch pipe B corresponds to and communicates with each blow rod.

[0013] Furthermore, the cross-section of the air outlet is V-shaped.

[0014] Furthermore, the side of the enclosure is provided with a cooling vent that communicates with the cavity below the enclosure, and a dustproof screen is installed inside the cooling vent.

[0015] Furthermore, several retaining rings are fixed at intervals along the length of the outer side of the conveying roller A, and several annular grooves are provided at intervals along the length of the outer wall of the conveying roller B.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0017] By making the conveyor roller A hollow and evenly distributing water inlets on the outer wall of the conveyor roller A, and working in conjunction with the water suction mechanism located inside the box, when the strip material is guided on the conveyor roller A, the water on the outer surface of the strip material can be drawn into the conveyor roller A and discharged, effectively reducing large water droplets on the surface of the strip material. Through the operation of the blowing drying mechanism, the strip material passing through the conveyor roller B can be dried. The synergistic drying mechanism of first absorbing water and then blowing air has high drying efficiency and good effect, while reducing the pollution caused by large volume of water splashing due to direct blowing.

[0018] The heat generated by the motor is accumulated in the lower cavity of the housing. The axial flow fan delivers the hot air through the sleeve, guide pipe, and branch pipe B to the blowing rod. Finally, the hot air is blown out through the figure-eight shaped air outlet onto the conveying roller B to achieve air drying. The heat for air drying comes from the heat generated by the motor, eliminating the need for an additional heating device to heat the drying airflow and reducing costs. In addition, the air entering the lower cavity through the cooling port can cool the motor, achieving two benefits at once. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of a partial structure of the box surface in this utility model;

[0021] Figure 3 This is a schematic diagram of a partial internal structure of the box in this utility model;

[0022] Figure 4 This is a detailed structural diagram of the conveyor roller A in this utility model;

[0023] Figure 5 This is a schematic diagram of the axial flow fan structure installation in this utility model;

[0024] Figure 6 This is a schematic diagram of the structure on the stand in this invention;

[0025] Figure 7 This is a schematic diagram showing the assembly of the blower and the conveyor roller B.

[0026] Figure 8 This is a schematic cross-sectional view of the blow rod in this utility model.

[0027] In the diagram: 01, First support; 02, Second support; 1, Box body; 11, Partition; 2, Platform; 3, Conveyor roller A; 31, Water inlet; 32, Baffle ring; 4, Water suction mechanism; 41, Centrifugal fan; 411, Motor; 42, Water suction pipe; 43, Main pipe; 44, Branch pipe A; 45, Rotating sleeve; 46, Exhaust pipe; 5, Conveyor roller B; 51, Annular groove; 6, Air drying mechanism; 601, Cooling port; 602, Dustproof net; 61, Sleeve body; 62, Axial flow fan; 63, Guide pipe; 64, Branch pipe B; 65, Blowing rod; 651, Mounting bracket; 66, Air outlet. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0030] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Example 1

[0031] Please see Figures 1-8 The present invention provides a strip drying device for plastic granulation processing, including a box body 1 and a frame 2 disposed on one side of the box body 1. A pair of first supports 01 are fixed on the top of the box body 1. Several conveying rollers A3 are rotatably arranged in an array between the two first supports 01 along the strip conveying direction. The strip material after being immersed in water and cooled is guided to each conveying roller A3. The conveying rollers A3 can be used to guide the strip material to be conveyed downstream. Each conveying roller A3 is hollow. Several water suction ports 31 are arranged in an array around its axis on the outer peripheral wall of each conveying roller A3. The water suction ports 31 extend along the length direction of the conveying roller A3 and communicate with the interior of the conveying roller A3.

[0032] The housing 1 is equipped with a water suction mechanism 4, which is connected to the inside of the conveying roller A3. The water suction mechanism 4 performs suction work, drawing external air from the water suction port 31 into the conveying roller A3 and flowing into the water suction mechanism 4, forming a strong suction airflow. When the strip is guided on the conveying roller A3, the water droplets on it are drawn into the conveying roller A3 through the water suction port 31 and flow into the water suction mechanism 4 along with the suction airflow, realizing the initial suction of water on the surface of the strip.

[0033] The top of the frame 2 has a pair of second supports 02, and several conveying rollers B5 are rotatably mounted in an array between the two second supports 02. The box 1 and the frame 2 are jointly provided with a blowing drying mechanism 6. By working through the blowing drying mechanism 6, the strip material passing through the conveying rollers B5 can be dried by blowing, so as to realize the blowing drying of the surface of the strip material.

[0034] As can be seen, this application sets the conveyor roller A3 to be hollow and evenly distributes water inlets 31 on the outer wall of the conveyor roller A3. It works in conjunction with the water suction mechanism 4 located in the housing 1. When the strip material is guided on the conveyor roller A3, the water on the outer surface of the strip material can be drawn into the conveyor roller A3 and discharged. Through the operation of the blowing drying mechanism 6, the strip material passing through the conveyor roller B5 can be dried. The combined drying mechanism of first absorbing water and then blowing air has high drying efficiency and good effect. At the same time, it can reduce the pollution caused by large volume of water splashing due to direct blowing. Example 2

[0035] Please see Figure 2 , Figure 3 and Figure 4 The difference between this embodiment and Embodiment 1 is that:

[0036] The water suction mechanism 4 includes a centrifugal fan 41, a water suction pipe 42, a main pipe 43, branch pipes A44, and a rotating sleeve 45. The centrifugal fan 41 is installed inside the housing 1. The power of the centrifugal fan 41 is 3kW. The air inlet of the centrifugal fan 41 is connected to the water suction pipe 42. The other end of the water suction pipe 42 extends to the outside of the housing 1 and is connected to the main pipe 43. The main pipe 43 is connected to several branch pipes A44. One end of each conveying roller A3 is rotatably mounted with a rotating sleeve 45. The rotating sleeve 45 is connected to the conveying roller A3. Each branch pipe A44 is fixedly connected to the rotating sleeve 45 one by one.

[0037] With the centrifugal fan 41 working, its internal blades rotate at high speed. Under the connection of the suction pipe 42, main pipe 43, branch pipe A44 and rotating sleeve 45, external air can be drawn into the housing of the centrifugal fan 41. When the strip passes through the conveyor roller A3, the large volume water droplets attached to its surface can be drawn into the housing of the centrifugal fan 41, thereby achieving pre-absorption of water.

[0038] One end of the rotating sleeve 45 is rotatably connected to the shaft end of the conveying roller A3, and the other end is fixedly connected to the branch pipe A44. As a receiving part of the branch pipe A44 and the conveying roller A3, the branch pipe A44 and the conveying roller A3 have the ability to move relative to each other to accommodate the rotation of the conveying roller A3 when guiding the strip material.

[0039] The centrifugal fan 41 has an exhaust pipe 46 connected to its outlet. The exhaust pipe 46 extends through the outside of the housing 1 and is connected to an external treatment box (not shown in the figure). The water suction mechanism 4 draws water to form an airflow containing droplets, which is then introduced into the treatment box through the outlet of the centrifugal fan 41 and the exhaust pipe 46. The treatment box dries, filters, and deodorizes the airflow before it is discharged without pollution. The treatment box uses existing technology, and its specific structure and working principle will not be described in detail.

[0040] In addition, a partition 11 is fixed inside the housing 1, dividing the housing 1 into upper and lower chambers. The centrifugal fan 41 is fixed on the upper surface of the partition 11, and the motor 411 on the centrifugal fan 41 extends through into the lower chamber. The partition 11 can ensure the firmness of the centrifugal fan 41 installation. When the motor 411 is running, it will generate heat, and the heat will accumulate in the lower chamber of the housing 1. Example 3

[0041] Please see Figures 5-7 The difference between this embodiment and Embodiment 2 is that:

[0042] The blowing drying mechanism 6 includes a sleeve body 61, an axial flow fan 62, a guide pipe 63, a branch pipe B64, and a blower 65. One end of the sleeve body 61 is connected to the side of the housing 1 and communicates with the lower cavity. The other end is connected to the guide pipe 63. The axial flow fan 62 is installed inside the sleeve body 61 and is used to draw air from the lower cavity of the housing 1 into the guide pipe 63. The axial flow fan 62 has a power of 2kW.

[0043] Several branch pipes B64 are connected to the guide pipe 63. A blower 65 is installed on the second bracket 02 through the mounting bracket 651. The blower 65 corresponds to the position of the conveyor roller B5. Each blower 65 is hollow, and each blower 65 has a blower 66 facing downwards and directly facing the conveyor roller B5 on its outer peripheral wall. The blower 66 extends along the length of the conveyor roller B5. Each branch pipe B64 corresponds to and is connected to each blower 65.

[0044] The axial flow fan 62 draws the high-temperature gas, generated by the heat from the motor 411, from the lower cavity of the housing 1 into the sleeve 61, and then sequentially delivers it to each blower 65 through the guide pipe 63 and each branch pipe B64. Finally, it blows the gas vertically downward through each air outlet 66 onto each conveyor roller B5, thus drying the surface of the strip material passing through the conveyor roller B5 with hot air.

[0045] like Figure 3 As shown, the side of the housing 1 is provided with a cooling port 601 that communicates with the lower cavity of the housing 1. After the air in the lower cavity of the housing 1 is extracted, a negative pressure is formed inside it. External air enters the cavity through the cooling port 601 to ensure the pressure balance in the cavity. In this way, a continuous airflow is formed. A dustproof net 602 is installed inside the cooling port 601 to prevent dust and other particulate impurities from entering the lower cavity and causing pollution.

[0046] In addition, the lower-temperature airflow enters the lower cavity and exchanges heat with the surface of the motor 411, which can cool down the motor 411 and improve the stability of the motor 411 operation.

[0047] The heat generated by the hot air drying comes from the heat generated by the motor 411, eliminating the need for an additional heating device to heat the drying airflow and reducing costs. In addition, the air entering the lower cavity through the cooling port 601 can cool the motor 411, achieving two benefits in one go.

[0048] like Figure 8 As shown, the cross-section of the air outlet 66 is V-shaped, and the size of the air outlet 66 is gradually expanded from top to bottom, so that the drying airflow blows downward within a certain range, increasing the coverage area of ​​the drying airflow on the conveyor roller B5 and improving the drying effect on the strip material.

[0049] In addition, the distance between the air outlet 66 and the conveyor roller B5 is 25-30mm to avoid the distance being too far and affecting the drying effect. Example 4

[0050] Please see Figure 4 and Figure 7 The difference between this embodiment and Embodiment 3 is as follows:

[0051] Several retaining rings 32 are fixed at intervals along the length of the conveying roller A3, and several annular grooves 51 are provided at intervals along the length of the outer wall of the conveying roller B5.

[0052] By positioning the strips one by one on the conveyor roller A3 between the two retaining rings 32, and by positioning the strips one by one within the annular groove 51 on the conveyor roller B5, interference between adjacent strips can be avoided, thus improving the stability of the strip conveying process.

[0053] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A strip drying device for plastic granulation processing, comprising a housing (1) and a frame (2) disposed on one side of the housing (1), characterized in that: The top of the box (1) is equipped with several conveying rollers A (3) arranged in an array via the first bracket (01). Each conveying roller A (3) is hollow, and several water inlets (31) are arranged in an array around its axis on the outer peripheral wall of each conveying roller A (3). The water inlets (31) all extend along the length of the conveying roller A (3) and are all connected to the interior of the conveying roller A (3); The box (1) is equipped with a water absorption mechanism (4), which is connected to the inside of the conveying roller A (3) and is used to draw water droplets from the surface of the strip into the conveying roller A (3). The top of the platform (2) is equipped with several conveying rollers B (5) in an array-like rotation via a second support (02); The box (1) and the frame (2) are both equipped with a blowing drying mechanism (6) for blowing and drying the strip material passing through the conveyor roller B (5).

2. The strip drying device for plastic granulation processing according to claim 1, characterized in that: The water suction mechanism (4) includes a centrifugal fan (41), a water suction pipe (42), a main pipe (43), a branch pipe A (44), and a rotating sleeve (45). The centrifugal fan (41) is installed inside the housing (1). The air inlet of the centrifugal fan (41) is connected to a water suction pipe (42). The other end of the water suction pipe (42) extends to the outside of the housing (1) and is connected to the main pipe (43). The main pipe (43) is connected to a plurality of the branch pipes A (44). One end of each of the conveying rollers A (3) is rotatably fitted with a rotating sleeve (45), and the rotating sleeve (45) is connected to the conveying roller A (3); Each of the branch pipes A (44) is fixedly connected to the rotating sleeve (45) in a one-to-one correspondence.

3. The strip drying device for plastic granulation processing according to claim 2, characterized in that: The outlet of the centrifugal fan (41) is connected to an exhaust pipe (46), which extends through to the outside of the housing (1).

4. The strip drying device for plastic granulation processing according to claim 2, characterized in that: A partition (11) is fixed inside the box (1) to divide the box (1) into upper and lower cavities; The centrifugal fan (41) is fixed on the upper surface of the partition (11), and the motor (411) on the centrifugal fan (41) extends through into the lower cavity.

5. The strip drying device for plastic granulation processing according to claim 4, characterized in that: The blowing drying mechanism (6) includes a sleeve (61), an axial flow fan (62), a guide pipe (63), a branch pipe B (64), and a blower (65); One end of the sleeve (61) is connected to the side of the box (1) and communicates with the lower cavity, while the other end is connected to the guide pipe (63). The axial flow fan (62) is installed inside the sleeve (61) to draw air from the cavity below the box (1) into the guide pipe (63); The guide pipe (63) is connected to several branch pipes B (64). The blow rod (65) is mounted on the second bracket (02) via a mounting bracket (651), and the position of the blow rod (65) corresponds one-to-one with that of the conveying roller B (5); Each of the blow rods (65) is hollow, and each of the blow rods (65) has a blow nozzle (66) facing downwards and directly opposite the conveying roller B (5) on its outer peripheral wall. The blow nozzle (66) extends along the length of the conveying roller B (5). Each of the branch pipes B (64) and each of the blowpipes (65) are connected in a one-to-one correspondence.

6. The strip drying device for plastic granulation processing according to claim 5, characterized in that: The cross-section of the air outlet (66) is V-shaped.

7. The strip drying device for plastic granulation processing according to claim 6, characterized in that: The side of the box (1) is provided with a cooling port (601) that communicates with the cavity below the box (1), and a dustproof net (602) is installed in the cooling port (601).

8. The strip drying device for plastic granulation processing according to claim 1, characterized in that: The conveying roller A (3) has several retaining rings (32) fixed at intervals along its length direction on the outside. The outer wall of the conveying roller B (5) is provided with several annular grooves (51) spaced apart along its length.

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