Recycled plastic particle preheater

Abstract

The utility model provides a recycled plastic particle preheater. The recycled plastic particle preheater comprises an outer cylinder, the inner cylinder is rotatably mounted in the outer cylinder, one end of the inner cylinder is open, the other end of the inner cylinder is closed, and the open end of the inner cylinder extends to the outside of the outer cylinder; a spiral conveying blade is fixedly connected to the outer wall of the inner cylinder in a sleeving manner; the heating assembly is arranged on the inner wall of the inner cylinder; the heating column is inserted into the inner cylinder, and an interval groove is formed between the heating column and the inner wall of the inner cylinder; the space groove is filled with a heat conduction oil layer; a sealing part is arranged between the heating column and the opening end of the inner cylinder, and an end plate is fixedly installed on the end face of the heating column and connected with the end of the outer cylinder through an installation pressing piece. When the raw materials are spirally conveyed between the inner barrel and the outer barrel, through the arrangement of the heating assembly, the heating column and the heat conduction oil layer, double heating treatment on the inner side and the outer side of the raw materials can be achieved, and the preheating effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of recycled plastic pellets, and in particular to a recycled plastic pellet preheater. Background Technology

[0002] Recycled plastic pellets are made from waste plastic products, turning waste into treasure and achieving recycling.

[0003] In the production of recycled plastic pellets, a preheater is required to preheat the raw materials. Traditional preheaters set the heating element on the outer shell, and the inner shell has a conveying structure, such as a screw conveyor. The raw materials are conveyed and heated at the same time. In the above preheating process, the raw materials are located between the screw conveyor and the inner wall of the outer shell. However, the preheating effect may be poor if the heating structure on the inner wall of the outer shell is used alone, especially when the preheating temperature requirement is high, it may not be able to meet the preheating requirements. Utility Model Content

[0004] This invention provides a preheater for recycled plastic granules to solve the technical problem of poor preheating effect during raw material transportation.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0006] This utility model provides a preheater for recycled plastic pellets, including an outer cylinder; and further including: an inner cylinder, which is rotatably installed inside the outer cylinder, one end of the inner cylinder being open and the other end being closed, the open end of the inner cylinder extending to the outside of the outer cylinder; a spiral conveying blade is fixedly sleeved on the outer wall of the inner cylinder; a heating assembly, which is disposed on the inner wall of the inner cylinder; a heating column, which is inserted into the interior of the inner cylinder, and a groove is formed between the heating column and the inner wall of the inner cylinder; a heat-conducting oil layer is filled in the groove; a sealing part is provided between the heating column and the open end of the inner cylinder, and an end plate is fixedly installed on the end face of the heating column, the end plate being connected to the end of the outer cylinder through a mounting clamp.

[0007] In this technical solution, when the raw material is conveyed by a screw between the inner and outer cylinders, the heating components, heating columns, and heat-conducting oil layer can achieve dual heating treatment on both the inner and outer sides of the raw material, ensuring the preheating effect.

[0008] Preferably, the heating assembly includes a heating element; the heating element is fixedly installed on the inner wall of the inner cylinder, and a heat-conducting plate is fixedly installed on the side of the heating element away from the inner cylinder wall.

[0009] In this technical solution, the heating component enables the inner wall of the outer cylinder to be heated, providing heating treatment for the outer side of the raw material conveyed by the screw conveyor.

[0010] Preferably, a feed inlet is fixedly connected to the top of one side of the outer cylinder, and a discharge outlet is fixedly connected to the bottom of the other side of the outer cylinder.

[0011] In this technical solution, the inlet and outlet are used for the feeding and discharging of raw materials, respectively.

[0012] Preferably, it also includes a frame; the bottom of the outer cylinder is fixedly installed above the frame.

[0013] In this technical solution, the frame provides support and fixation for the outer cylinder.

[0014] Preferably, a motor is fixedly mounted on the frame, and the output shaft of the motor is fixedly connected to the middle of the closed end of the inner cylinder.

[0015] In this technical solution, the motor is used to drive the inner cylinder to rotate.

[0016] Preferably, the sealing part includes a pressure ring; the pressure ring is fixedly sleeved onto the cylindrical surface of the heating column, and a sealing gasket is provided on one side of the pressure ring, the sealing gasket being pressed against the open end of the inner cylinder.

[0017] In this technical solution, the sealing part is used to provide a seal between the open end of the inner cylinder and the heating column.

[0018] Preferably, the mounting pressure component includes a fixing seat; the fixing seat is fixedly installed on the outer wall of the end of the outer cylinder, and a stud is fixedly installed on the fixing seat. The stud passes through a through hole opened on the end plate, and a nut is threaded onto the stud.

[0019] In this technical solution, the mounting pressure component is used to provide installation for the heating column and to provide pressure so that the sealing gasket is pressed against the open end of the inner cylinder.

[0020] Preferably, a compression spring is fitted onto the stud, and the compression spring is located between the nut and the end plate.

[0021] Preferably, the heating column is fitted with two support rings, which are located at the inner walls of both ends of the inner cylinder.

[0022] Preferably, the outer ring of the support ring is provided with a plurality of evenly distributed balls, and the balls are in contact with the inner wall of the inner cylinder.

[0023] In this technical solution, the support ring provides support for the heating column.

[0024] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0025] The positive and progressive effects of this utility model are as follows:

[0026] The aforementioned recycled plastic pellet preheater, by installing a heating component at the outer cylinder and a heating column and a heat-conducting oil layer inside the inner cylinder, allows the raw material to be conveyed via a spiral conveyor blade when the inner cylinder rotates. The raw material located between the inner and outer cylinders can be heated on both its inner and outer sides, providing dual heating treatment, thus improving the preheating effect and meeting the requirement for higher preheating temperatures. Furthermore, during raw material preheating, the inner cylinder needs to rotate, while the heating column is connected to the outer cylinder via a mounting clamp. The heating column does not rotate. With the inner cylinder and the heating column rotating relative to each other, the heat transfer effect is ensured through the heat-conducting oil layer between them. Even further, the mounting clamp provides clamping force, causing the sealing part to act at the open end of the inner cylinder, ensuring the sealing effect of the groove and preventing leakage of heat-conducting oil from the groove. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0028] Figure 2 This utility model Figure 1 Enlarged structural diagram of section A in the middle.

[0029] Figure 3 This is a schematic diagram of the internal structure of the outer cylinder of this utility model.

[0030] Figure 4 This utility model Figure 3 Enlarged structural diagram of section B.

[0031] Figure 5 This is a schematic diagram of the connection between the inner cylinder opening and the heating column of this utility model.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Frame; 2. Outer cylinder; 201. Heating element; 202. Heat-conducting element; 3. Feed inlet; 4. Motor; 5. Discharge outlet; 6. Heating column; 601. End plate; 602. Pressure ring; 603. Support ring; 604. Ball bearing; 605. Sealing gasket; 7. Mounting components; 701. Fixing base; 702. Stud; 703. Nut; 704. Compression spring; 8. Inner cylinder; 9. Screw conveyor blades. Detailed Implementation

[0034] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments described herein.

[0035] like Figure 1-5As shown, a preheater for recycled plastic pellets includes an outer cylinder 2; it also includes: an inner cylinder 8, which is rotatably installed inside the outer cylinder 2, with one end of the inner cylinder 8 open and the other end closed, the open end of the inner cylinder 8 extending to the outside of the outer cylinder 2; a spiral conveying blade 9 fixedly sleeved on the outer wall of the inner cylinder 8; a heating assembly, which is disposed on the inner wall of the inner cylinder 8; a heating column 6, which is inserted into the interior of the inner cylinder 8, and a groove is formed between the heating column 6 and the inner wall of the inner cylinder 8; the groove is filled with a heat-conducting oil layer; a sealing part is provided between the heating column 6 and the open end of the inner cylinder 8, and an end plate 601 is fixedly installed on the end face of the heating column 6, the end plate 601 being connected to the end of the outer cylinder 2 through a mounting pressure member 7.

[0036] like Figure 1 As shown, a feed inlet 3 is fixedly connected to the top of one side of the outer cylinder 2, and a discharge outlet 5 is fixedly connected to the bottom of the other side of the outer cylinder 2. It also includes a frame 1; the bottom of the outer cylinder 2 is fixedly mounted above the frame 1. A motor 4 is fixedly mounted on the frame 1, and the output shaft of the motor 4 is fixedly connected to the middle of the closed end of the inner cylinder 8.

[0037] In practice, waste plastic products are crushed and the resulting fragments are used as raw materials. The raw materials are fed into the inlet 3 and enter between the outer cylinder 2 and the inner cylinder 8. The motor 4 drives the inner cylinder 8 and the spiral conveying blades 9 on the inner cylinder 8 to rotate together, providing spiral conveying for the raw materials. At the same time, the raw materials are heated by the heating components, which heat the outside of the raw materials. The heating column 6 heats the raw materials, and the heat is transferred to the inner cylinder 8 through the heat transfer oil, which heats the inside of the raw materials. This dual heating ensures the preheating effect. After being conveyed and preheated at the same time, the raw materials are discharged through the outlet 5.

[0038] like Figure 3-4 As shown, the heating assembly includes a heating element 201; the heating element 201 is fixedly installed on the inner wall of the inner cylinder 8, and a heat-conducting element 202 is fixedly installed on the side of the heating element 201 away from the inner cylinder 8 wall.

[0039] Heating element 201 generates heat, which is then transferred to the raw material through heat-conducting element 202 to heat the raw material.

[0040] In practice, both the heating element 201 and the heating column 6 are electric heating devices; at the same time, a controller is set on the frame 1 and a temperature sensor is set on the inner wall of the outer cylinder 2 for heating control.

[0041] like Figure 3 and 5As shown, the sealing part includes a pressure ring 602; the pressure ring 602 is fixedly sleeved onto the cylindrical surface of the heating column 6, and a sealing gasket 605 is provided on one side of the pressure ring 602, and the sealing gasket 605 is pressed against the opening end of the inner cylinder 8.

[0042] like Figure 3 and 5 As shown, the mounting pressure component 7 includes a fixing seat 701; the fixing seat 701 is fixedly installed on the outer wall of the end of the outer cylinder 2, and a stud 702 is fixedly installed on the fixing seat 701. The stud 702 passes through a through hole in the end plate 601, and a nut 703 is threaded onto the stud 702. A compression spring 704 is sleeved on the stud 702, and the compression spring 704 is located between the nut 703 and the end plate 601.

[0043] The heating column 6 is connected to the outer cylinder 2 via the mounting pressure member 7. When the inner cylinder 8 rotates, the heating column 6 does not rotate with it, but the compression spring 704 is in a compressed state, providing pressure to the end plate 601, thereby pressing the sealing gasket 605 against the open end of the inner cylinder 8. When the inner cylinder 8 rotates, the open end face of the inner cylinder 8 and the sealing gasket 605 rotate relative to each other and rub against each other. Through the pressing design, the sealing effect of the open end is ensured, and the leakage of heat transfer oil is avoided.

[0044] like Figure 3-5 As shown, two support rings 603 are fitted onto the heating column 6, and the two support rings 603 are respectively located at the inner walls of both ends of the inner cylinder 8. A plurality of evenly distributed balls 604 are provided on the outer ring of the support ring 603, and the balls 604 are in contact with the inner wall of the inner cylinder 8.

[0045] The heating column 6 is supported by the support ring 603. The inner cylinder 8 and the ball bearing 604 are rolled and rubbed together when the inner cylinder 8 rotates, which reduces the frictional resistance.

[0046] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A regenerative plastic particles preheater comprising an outer cylinder (2); characterized in that, Also include: The inner cylinder (8) is rotatably mounted to the outer cylinder (2) inside, one end of the inner cylinder (8) is open, and the other end of the inner cylinder (8) is closed, the open end of the inner cylinder (8) extends to the outside of the outer cylinder (2); The outer wall of the inner cylinder (8) is fixedly sleeved with a spiral conveying blade (9); The heating assembly is arranged on the inner wall of the inner cylinder (8); The heating column (6) is inserted into the inner cylinder (8), and the heating column (6) and the inner wall of the inner cylinder (8) form a gap; the gap is filled with a heat conducting oil layer; The heating column (6) and the open end of the inner cylinder (8) are provided with a sealing part, and the end face of the heating column (6) is fixedly installed with an end plate (601), the end plate (601) is connected with the end part of the outer cylinder (2) through the mounting pressure piece (7).

2. A preheater for recycled plastic pellets as claimed in claim 1, characterized in that: The heating assembly includes a heating sheet (201); the heating sheet (201) is fixedly installed on the inner wall of the inner cylinder (8), and the heat conducting sheet (202) is fixedly installed on the side of the heating sheet (201) away from the wall of the inner cylinder (8).

3. A preheater for recycled plastic pellets as claimed in claim 1, wherein: The side top of the outer cylinder (2) is fixedly connected with a feeding port (3), and the other side bottom of the outer cylinder (2) is fixedly connected with a discharging port (5).

4. A preheater for recycled plastic pellets as claimed in claim 1, wherein: Also include the rack (1); the bottom of the outer cylinder (2) is fixedly installed above the rack (1).

5. A preheater for recycled plastic pellets as claimed in claim 4, characterized in that: The motor (4) is fixedly installed on the rack (1), and the output shaft of the motor (4) is fixedly connected with the middle part of the closed end of the inner cylinder (8).

6. A preheater for recycled plastic pellets as claimed in claim 1, wherein: The sealing part includes a compression ring (602); the compression ring (602) is fixedly sleeved on the cylindrical surface of the heating column (6), one side of the compression ring (602) is provided with a sealing washer (605), and the sealing washer (605) is pressed to the open end of the inner cylinder (8).

7. A preheater for recycled plastic pellets as claimed in claim 1, wherein: The mounting pressure piece (7) includes a fixed seat (701); the fixed seat (701) is fixedly installed on the end outer wall of the outer cylinder (2), the fixed seat (701) is fixedly installed with a stud (702), the stud (702) penetrates through the through hole formed on the end plate (601), and the stud (702) is threadedly connected with a nut (703).

8. A preheater for recycled plastic pellets as claimed in claim 7, wherein: The stud (702) is sleeved with a compression spring (704), and the compression spring (704) is located between the nut (703) and the end plate (601).

9. A preheater for recycled plastic pellets as claimed in claim 1, wherein: Two support rings (603) are sleeved on the heating column (6), and the two support rings (603) are located at the inner walls of the two ends of the inner cylinder (8) respectively.

10. A preheater for recycled plastic pellets as claimed in claim 9, wherein: A plurality of uniformly distributed ball bearings (604) are arranged on the outer ring of the support ring (603), and the ball bearings (604) are in contact with the inner wall of the inner cylinder (8).

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