Plastic particle continuous drying device for producing plastic products

Abstract

The utility model discloses a plastic particle continuous drying device for producing plastic products. The plastic particle continuous drying device comprises a machine shell, a conveying belt, a heating element, an air spraying pipe and a cover body. The conveying belt is horizontally arranged in the machine shell, and the two ends of the conveying belt extend out of the machine shell from an inlet and an outlet of the machine shell respectively. Exhaust holes are formed in the top face of the machine shell, and the conveying belt is a porous conveying belt. The heating element and the air spraying pipe are arranged between the upper belt face and the lower belt face of the conveying belt, the cover body is arranged over the air spraying pipe, and air spraying holes which are formed upwards are formed in the air spraying pipe. The cover body is of a long-strip-shaped conical groove-shaped structure and is arranged in the width direction of the conveying belt in a crossing mode. Sealing plates are arranged at the two ends of the cover body, and the lower ends of the sealing plates extend to the position below the side face of the conveying belt. And an exhaust hole is formed in the top surface of the cover body. The drying device disclosed by the utility model not only can be used for continuously drying the plastic particles, but also has higher drying efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic particle drying, in particular to a plastic particle continuous drying device for producing plastic products. Background Art

[0002] After the plastic raw materials used to prepare various plastic products are processed into plastic particles, they usually need to be cleaned to remove dust and other substances on the surface of the plastic particles to prevent affecting the quality of the prepared plastic products. The washed plastic particles need to be further dried to remove moisture to prevent the steam formed by these moisture from forming bubbles in the plastic products during the process of heating and plasticizing the plastic particles to prepare plastic products, thereby affecting the quality of the plastic products. At present, when drying plastic particles, tank-type drying devices are usually used. This drying device needs to be stopped after each drying, and then the dried plastic particles are unloaded. Then new plastic particles that need to be dried are added. This type of drying device has the problem of low efficiency and cannot continuously dry the plastic particles, thereby affecting the processing efficiency. In addition, since the plastic particles are piled together during the drying process, even if they are continuously stirred during the drying process, the rate of water loss is still affected, thereby affecting the drying efficiency, and the reduction in drying efficiency usually requires a longer drying time to compensate, which in turn causes an increase in energy consumption. Utility Model Content

[0003] In view of the above problems, the utility model proposes a plastic granule continuous drying device for producing plastic products, which can not only perform continuous drying of plastic granules but also has higher drying efficiency. Specifically, the utility model discloses the following technical solutions.

[0004] A plastic granule continuous drying device for producing plastic products, comprising: a casing, a conveyor belt, a heating element, an air jet pipe and a cover body. The conveyor belt is horizontally arranged in the casing, and the two ends of the conveyor belt extend from the inlet and outlet of the casing to the outside of the casing respectively. The top surface of the casing is provided with exhaust holes, and the conveyor belt is a porous conveyor belt. The heating element and the air jet pipe are both arranged between the upper belt surface and the lower belt surface of the conveyor belt, and the air jet pipe has an upwardly arranged air jet hole. The cover body is arranged above the conveyor belt and directly above the air jet pipe. The cover body is a long conical groove structure, which is arranged across the width direction of the conveyor belt and has a gap between the two. The two ends of the cover body have sealing plates, and the lower end of the sealing plate extends to below the side of the conveyor belt, and the sealing plate is in sliding contact with the side of the conveyor belt. The top surface of the cover body is provided with exhaust holes.

[0005] Furthermore, the jet pipe is connected to a blower so as to spray driving gas toward the plastic particles on the conveyor belt through the jet holes on the jet pipe.

[0006] Furthermore, the sealing plates at both ends of the cover body are fixedly connected to the inner walls of the casing at the corresponding sides.

[0007] Furthermore, the sealing plate has a connecting hole, and the sealing plate is detachably fixedly connected to the inner wall of the casing through the connecting hole and a fastener.

[0008] Furthermore, it also includes an exhaust hole clearing mechanism, which includes a lifting device and a lifting rod. The lifting device is fixed on the upper surface of the top wall of the housing, the lifting rod is vertically arranged above the cover body in the housing, and the upper end of the lifting rod is connected to the lifting device, the lower end of the lifting rod is aligned with the exhaust hole on the top surface of the cover body, and the lifting rod can enter and exit the exhaust hole.

[0009] Furthermore, the top surface of the cover body has a plurality of exhaust holes spaced apart along its length, and each exhaust hole corresponds to one lifting rod. The upper end of each lifting rod is fixed on a cross bar, and the cross bar is fixedly connected to the telescopic rod of the lifting device.

[0010] Furthermore, both ends of the crossbar are slidably connected to guide rods, and the guide rods are vertically fixed on the lower surface of the top wall of the casing.

[0011] Furthermore, the angles of the two inclined side walls of the cover body are 30-60 degrees, and the cover body can have a good gathering and blocking effect on the blown and flipped plastic particles.

[0012] Furthermore, the heating element includes any one of an electric heating rod, an electric heating tube, etc.

[0013] Furthermore, the discharging end of the conveyor belt is provided with a collecting box to collect the dried plastic particles.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] (1) The drying device of the utility model can place the plastic particles on the continuously running conveyor belt for continuous drying, which is a more efficient drying method. At the same time, since the dried plastic particles are laid flat on the conveyor belt, the water loss rate is faster than that of drying in a tank body, which avoids the problem of reducing the water loss rate due to the accumulation of a large number of plastic particles during drying in the tank body, thereby reducing the drying efficiency.

[0016] (2) The drying device of the utility model is also provided with corresponding covers and jet pipes above and below the upper belt surface of the conveyor belt, so that during the drying process, the plastic particles passing under the covers can be turned over by the driving gas ejected from the jet pipes, thereby accelerating the rate of water loss. On the one hand, the covers can restrain the turned plastic particles to prevent them from splashing out from the conveyor belt. On the other hand, the lower edge of the discharge side of the covers can play a role in leveling the materials, preventing the turned plastic particles from being unevenly accumulated on the conveyor belt, thereby affecting the subsequent drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0018] Figure 1 Schematic diagram of the internal structure of a continuous drying device for plastic particles used to produce plastic products in an embodiment.

[0019] Figure 2 It is a side view of a continuous drying device for plastic particles used to produce plastic products in an embodiment.

[0020] Figure 3 Schematic diagram of the structure of the cover body in the embodiment.

[0021] The marks in the above figure represent: 1-housing, 2-conveyor belt, 3-heating element, 4-injection pipe, 5-cover, 6-lifting device, 7-lifting rod, 8-cross bar, 9-telescopic rod, 10-guide rod, 101-exhaust hole, 501-sealing plate, 502-exhaust hole, 503-connecting hole. DETAILED DESCRIPTION

[0022] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0023] For the convenience of description, if the words "up", "down", "left" and "right" appear in the utility model, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the utility model and simplifying the description. Now, in combination with the drawings and specific embodiments of the specification, the plastic granule continuous drying device for producing plastic products of the utility model is further described.

[0024] refer to Figure 1 , Figure 2 and Figure 3, an example of a plastic granule continuous drying device for producing plastic products is provided, comprising: a housing 1, a conveyor belt 2, a heating element 3, an air jet 4 and a cover 5. Specifically: the housing 1 is a rectangular box-type structure, and has an inlet and an outlet at the left and right ends respectively, and a plurality of exhaust holes 101 are arranged at intervals along the length direction on the top surface of the housing 1, and the conveyor belt 2 is a porous conveyor belt. The conveyor belt 2 is horizontally arranged in the housing 1, and the two ends of the conveyor belt 2 extend from the inlet and the outlet to the outside of the housing 1 respectively, so that the plastic granules to be dried are transported from the left end of the conveyor belt 2 to the housing 1 for drying, and then transported from the outlet to the outside of the housing 1 for collection after completion. This drying method is more efficient. At the same time, since the dried plastic granules are flat on the conveyor belt 2, the stacking density is smaller, so that the water loss rate in the plastic granules can be faster than the method of drying in the tank body, avoiding the problem of reducing the water loss rate due to the large amount of plastic granules piling up when drying in the tank body, thereby reducing the drying efficiency and increasing energy consumption.

[0025] A plurality of heating elements 3 are arranged at intervals between the upper and lower surfaces of the conveyor belt 2. The heating elements 3 can be existing or commercially available electric heating rods, electric heating tubes, etc., which can generate heat to heat and dry the plastic particles laid flat on the conveyor belt 2 after being powered on. The generated water vapor rises and is discharged from the exhaust holes 101 on the top surface of the housing 1. A plurality of jet pipes 4 are arranged at intervals between the upper and lower surfaces of the conveyor belt 2. The jet pipes 4 have jet holes arranged upward. When in use, the jet pipes 4 are also connected to the blower outside the housing 1 to spray driving gas upward through the jet pipes 4, and then after passing through the porous conveyor belt 2, the accumulated plastic particles are turned over to further accelerate the drying rate.

[0026] In order to prevent the plastic particles from splashing down from the conveyor belt 2 when the airflow ejected from the jet pipe 4 turns over the plastic particles, a cover 5 is provided above the conveyor belt 2 in this embodiment. The cover 5 is a long tapered groove structure, which is arranged across the width direction of the conveyor belt 2, and there is a gap between the cover 5 and the conveyor belt 2, so that the plastic particles on the conveyor belt 2 pass from below the cover 5. For example, the vertical distance between the lower end of the cover 5 and the conveyor belt 2 is consistent with the thickness of the plastic particle layer on the conveyor belt 2. The cover 5 is located directly above the jet pipe 4. The cover 5 has vertical sealing plates 501 at both ends, and the lower end of the sealing plate 501 extends to the lower side of the conveyor belt 2, and the sealing plate 501 is in sliding contact with the side of the conveyor belt 2. The sealing plate 501 is fixedly connected to the side wall of the housing 1, thereby fixing the cover 5 in the housing 1.

[0027] In this embodiment, the top surface of the cover body 5 is a plane, and the plane has a number of exhaust holes 502 distributed at intervals, and its main function is to allow the gas sprayed into the cover body 5 by the air injection pipe 4 to be discharged from the exhaust holes 502 in time. The angles of the two inclined side walls of the cover body 5 can be selected between 30 and 60 degrees, such as 30 degrees, 45 degrees, 60 degrees, etc., and any other suitable angles can be selected as needed. The cover body 5 can have a good gathering and blocking effect on the blown and flipped plastic particles. On the one hand, the flipped plastic particles can be constrained to prevent them from splashing out from the conveyor belt 2. On the other hand, the lower edge of the discharge side of the cover body 5 can play a flattening role to prevent the flipped plastic particles from unevenly piling up on the conveyor belt 2, affecting the subsequent drying efficiency. In addition, it should be understood that the diameter of the exhaust hole 502 should be smaller than the diameter of the plastic particles on the conveyor belt 2 to prevent the plastic particles from being flushed out of the exhaust hole 502 in large quantities and splashing to the outside of the conveyor belt 2.

[0028] In another embodiment, reference Figure 3 The sealing plate 501 of the continuous drying device for producing plastic particles of the above embodiment has a connecting hole 503, and the sealing plate 501 is detachably fixedly connected to the inner wall of the casing 1 through the connecting hole 503 and fasteners (such as bolts, screws, etc.) to facilitate installation and maintenance of the cover body 5.

[0029] In another embodiment, reference Figure 1 and Figure 2 The plastic granule continuous drying device for producing plastic products in the above embodiment also includes an exhaust hole unblocking mechanism, which includes a lifting device 6 and a lifting rod 7. Wherein: the lifting device 6 is fixed on the upper surface of the top wall of the casing 1, the lifting rod 7 is vertically arranged above the cover body 5 in the casing 1, and the upper end of the lifting rod 7 is connected to the lifting device 6, the lower end of the lifting rod 7 is aligned with the exhaust hole 502 on the top surface of the cover body 5, and the lifting rod 7 can enter and exit the exhaust hole 502. The lifting device 6 can be an electric cylinder, etc., which can drive the lifting rod 7 to move downward, thereby unblocking the exhaust hole 502, discharging the plastic particles stuck therein, and preventing the exhaust hole 502 from being blocked and affecting the exhaust.

[0030] In a further embodiment, when the top surface of the cover body 5 has a plurality of exhaust holes 502 spaced apart along its length direction, each exhaust hole 502 needs to correspond to one lifting rod 7 to clear the exhaust hole 502. At this time, the upper ends of the lifting rods 7 corresponding to each exhaust hole 502 can be fixed on a transversely arranged crossbar 8, and the crossbar 8 is fixedly connected to the telescopic rod 9 of the lifting device 6. Thus, the lifting device 6 can be used as a whole to drive the lifting rods 7 to move synchronously to clear each exhaust hole 502.

[0031] In another embodiment, reference Figure 2 The two ends of the cross bar 8 of the continuous drying device for producing plastic granules of the previous embodiment have sliding holes, which are sleeved on the guide rod 10 and the two are slidably connected. The guide rod 10 is vertically fixed on the lower surface of the top wall of the housing 1, thereby increasing the stability of the cross bar 8 during movement and reducing its swing, so that the lifting rod 7 can accurately enter and exit the exhaust hole 502. In a more preferred embodiment, the lower end of the lifting rod 7 can also be set to a pointed shape to more conveniently enter the exhaust hole 502.

[0032] In another embodiment, the discharging end of the conveyor belt 2 of the continuous drying device for producing plastic particles of the above embodiment is provided with a collecting box to collect the dried plastic particles.

[0033] Finally, it should be noted that any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model. Although the above describes the specific implementation of the utility model in conjunction with the drawings, it is not a limitation on the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the utility model.

Claims

1. A continuous drying device for plastic particles used in the production of plastic products, characterized in that: include: A casing, wherein a top surface of the casing is provided with an exhaust hole; A conveyor belt, wherein the conveyor belt is a porous conveyor belt, which is horizontally arranged in the casing, and the two ends of the conveyor belt extend from the inlet and outlet of the casing to the outside of the casing respectively; A heating element and an air jet pipe, wherein the heating element and the air jet pipe are arranged between the upper belt surface and the lower belt surface of the conveyor belt, and the air jet pipe has an air jet hole arranged upward; A cover body, which is arranged above the conveyor belt and directly above the air injection pipe; The cover body is a long conical groove structure, which is arranged across the width direction of the conveyor belt with a gap between the two. The two ends of the cover body are provided with sealing plates, and the lower end of the sealing plate extends to below the side of the conveyor belt, and the sealing plate is in sliding contact with the side of the conveyor belt; the cover body is provided with exhaust holes.

2. The continuous drying device for plastic particles used to produce plastic products according to claim 1, characterized in that: The air injection pipe is connected with the blower.

3. The continuous drying device for plastic particles used in producing plastic products according to claim 1, characterized in that: The sealing plates at both ends of the cover body are fixedly connected to the inner walls of the casing at the corresponding sides.

4. The continuous drying device for plastic particles used in producing plastic products according to claim 1, characterized in that: The sealing plate is provided with a connecting hole, and the sealing plate is detachably fixedly connected to the inner wall of the casing through the connecting hole and a fastener.

5. The continuous drying device for plastic particles used in producing plastic products according to claim 1, characterized in that: The angles of the two inclined side walls of the cover body are 30-60 degrees.

6. The continuous drying device for plastic particles used in producing plastic products according to claim 1, characterized in that: The heating element includes any one of an electric heating rod and an electric heating tube.

7. The continuous drying device for plastic particles used for producing plastic products according to any one of claims 1 to 6, characterized in that: It also includes an exhaust hole clearing mechanism, which includes a lifting device and a lifting rod; wherein: the lifting device is fixed on the upper surface of the top wall of the casing, the lifting rod is vertically arranged above the cover body in the casing, and the upper end of the lifting rod is connected to the lifting device, the lower end of the lifting rod is aligned with the exhaust hole on the top surface of the cover body, and the lifting rod can enter and exit the exhaust hole.

8. The continuous drying device for plastic particles used in producing plastic products according to claim 7, characterized in that: The top surface of the cover body is provided with a plurality of exhaust holes spaced apart along its length direction, and each of the exhaust holes corresponds to one of the lifting rods; the upper end of each of the lifting rods is fixed on a cross bar, and the cross bar is fixedly connected to the telescopic rod of the lifting device.

9. The continuous drying device for plastic particles used in producing plastic products according to claim 8, characterized in that: The two ends of the cross bar are slidably connected to the guide rods, and the guide rods are vertically fixed on the lower surface of the top wall of the casing.

10. The continuous drying device for plastic particles used for producing plastic products according to any one of claims 1 to 6, characterized in that: The discharging end of the conveyor belt is provided with a collecting box.

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