Progressive recovery device for large PMMA (polymethyl methacrylate) composite product

Abstract

The utility model discloses a progressive recovery device of a large PMMA composite material product, relates to the post-processing field of retired composite material products, and comprises a transmission assembly, a spraying assembly and a recovery assembly, the spraying assembly and the recovery assembly are sequentially fixed on the transmission assembly, a bushing is arranged on the transmission assembly, a plurality of holes are uniformly distributed on the bushing, and the spraying assembly and the recovery assembly are fixed on the transmission assembly. A bearing bin is arranged at the bottom of the conveying assembly, washing liquid is contained in the bearing bin, a power pump is arranged in the bearing bin, and the spraying assembly communicates with the power pump. The PMMA resin matrix and fiber recycling device is simple in structure and small in influence on the environment, and can recycle PMMA resin matrixes and fibers and reuse the PMMA resin matrixes and the fibers in preparation of resin and fiber reinforced composite materials.

Description

Technical Field

[0001] This utility model belongs to the field of post-processing of decommissioned composite products, specifically relating to a progressive recycling device for large PMMA composite products. Background Technology

[0002] Large wind turbine blades are composite products, typically using glass fiber reinforced epoxy resin as the raw material. Epoxy resin is a thermosetting resin, meaning that once cured, it cannot be restored to its original material properties. Wind turbine blades have a lifespan of 20 years, with current annual decommissioning volumes in the tens of thousands, projected to reach hundreds of thousands to millions in the future. Fiberglass reinforced plastic (FRP) ships are also composite products, typically using fiber-reinforced resin as the raw material. Fiberglass ships have a lifespan of 20-30 years. With continuous advancements in FRP materials and technology, their application areas and markets are expanding, and they still hold significant potential for future environmental protection and sustainable development.

[0003] These solid waste products, composed of thermosetting resins and continuous fibers, cannot be recycled or landfilled, posing a significant environmental problem for my country and the world. Traditionally, there are two methods for recycling decommissioned composite products: one is to extract the raw materials through chemical methods for reuse, and the other is to crush the composite products and then heat-extrude them into other support components. Heated extrusion molding involves heating the resin to create adhesiveness that binds other components.

[0004] Polymethyl methacrylate (PMMA) is an important transparent engineering plastic, also known as acrylic or plexiglass. PMMA has a lower density than glass, approximately 1.14-1.20 g / cm³, and possesses good light transmittance, electrical insulation, chemical stability, and mechanical strength. It is used to mix thermosetting resin particles with thermoplastic resins and manufacture composite material sheets through vacuum casting molding. However, current recycling processes for PMMA composite products are complex, and chemical refining can easily cause environmental pollution, hindering the effective reuse of PMMA composite products.

[0005] In summary, there is an urgent need for a simple, environmentally friendly, and progressive recycling device to recycle PMMA and fiber-reinforced composite products, in order to further expand the application scope of PMMA. Utility Model Content

[0006] In view of this, the present invention provides a progressive recycling device for large PMMA composite products, which realizes the recycling of PMMA resin matrix and fibers and reuses them in the preparation of resin and fiber reinforced composite materials.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A progressive recycling device for large PMMA composite products includes a conveying component, a spraying component, and a recycling component. The spraying component and the recycling component are sequentially fixed on the conveying component. The conveying component is provided with a baffle plate with a plurality of holes evenly distributed on it. A carrying chamber is provided at the bottom of the conveying component, and the carrying chamber contains flushing liquid. A power pump is provided in the carrying chamber, and the spraying component is connected to the power pump.

[0009] Furthermore, the spray assembly is provided with spray pipes on the top and both sides, and the top spray pipe is equipped with a spray head.

[0010] Furthermore, the flushing liquid is methyl methacrylate.

[0011] Furthermore, it also includes a viscosity sensor, which is disposed in the support chamber.

[0012] Furthermore, the recycling assembly includes a take-up roller, a resin collection bin, and a bottom controller. The take-up roller is located at the tail of the conveying assembly and is used to collect continuous fiber fabric. The resin collection bin is located at the tail of the carrying bin and is connected to the carrying bin via the bottom controller.

[0013] Furthermore, the take-up roller is provided with U-shaped fixing frames at both ends, and the U-shaped fixing frames are mounted on the conveying assembly. The intermediate shafts at both ends of the take-up roller are rotatably connected to the U-shaped fixing frames through bearings.

[0014] Furthermore, the surface of the take-up roller is provided with a knurled texture for rapid fiber adhesion.

[0015] Furthermore, the take-up roller is fixedly connected to the servo motor drive shaft via a snap ring, and the servo motor drives the take-up roller to rotate.

[0016] Furthermore, it also includes a fiber recycling bin, which is located at the end of the conveying assembly via a hydraulic lifting device.

[0017] The beneficial effects of this invention are as follows: This invention uses a bottom power pump to spray methyl methacrylate (MMA) from the bearing chamber onto the PMMA composite product through a top spray nozzle. The resulting PMMA+MMA binary liquid resin flows into the bottom bearing chamber. When the viscosity sensor detects that the resin viscosity reaches a certain value, this binary liquid resin is discharged from the bearing chamber into the resin collection chamber, where it is used as recycled PMMA binary liquid resin for composite material preparation and recycling. This achieves the recycling of PMMA resin matrix and fibers, which are then reused in the preparation of resin and fiber-reinforced composite materials. This solves the problem of large quantities of waste fiberglass wind turbine blades being bulky and difficult to recycle, thus contributing to resource conservation, environmental protection, and the sustainable development of the wind power industry. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the recycling component of this utility model;

[0020] Figure 3 This is a schematic diagram of the spray assembly of this utility model.

[0021] In the diagram: 1. Spray assembly; 2. Spray pipe; 3. Spray head; 4. Viscosity sensor; 5. Resin collection bin; 6. Recycling assembly; 7. Rewinding roller; 8. Controller; 9. Conveying assembly; 10. Loading bin; 11. Spindle plate. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "horizontal," "inner," "outer," and "one side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not 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 this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1

[0025] like Figure 1-3 As shown in this embodiment, a progressive recycling device for large PMMA composite products can be used to recycle PMMA composites in fields such as aerospace materials, wind turbine blades, automobiles, ships, and high-speed rail. The recycled fibers include one or more of basalt fibers, glass fibers, and carbon fibers.

[0026] The recycling device includes a conveying assembly 9, a spraying assembly 1, and a recycling assembly 6. The spraying assembly 1 and the recycling assembly 6 are fixed sequentially on the conveying assembly 9. The conveying assembly 9 is an existing progressive conveying structure. A strainer 11 is installed on the conveying assembly 9. Several holes are evenly distributed on the strainer 11. A carrying chamber 10 is provided at the bottom of the conveying assembly 9. The carrying chamber 10 contains methyl methacrylate (MMA). A power pump is provided in the carrying chamber 10. The spraying assembly 1 is connected to the power pump.

[0027] The spray assembly 1 of this utility model is provided with spray pipes 2 on the top and both sides. The top spray pipe 2 is equipped with a spray head 3. The recycling device sprays methyl methacrylate (MMA) in the bearing chamber from the top spray head 3 onto the PMMA composite product through the power pump at the bottom. The resulting PMMA+MMA binary liquid resin flows into the bearing chamber 10 at the bottom. After repeated rinsing, the liquid resin flows into the bearing chamber 10 at the bottom. This cycle continues until the resin and fiber at the front end of the composite product are separated.

[0028] In a preferred embodiment of the present invention, a viscosity sensor 4 is also included. The viscosity sensor 4 is disposed in the bearing chamber 10 and is used to monitor the viscosity of the resin in the bearing chamber 10.

[0029] The recycling component 6 of this utility model includes a gantry support for support, a winding roller 7, a resin collection bin 5, and a bottom controller 8. The winding roller 7 is located at the tail of the conveying component 9 and is used to collect continuous fiber fabric. More specifically, the winding roller 7 has U-shaped fixing frames at both ends, which are mounted on the conveying component 9. The surface of the winding roller 7 is roughened, for example, with a knurled texture, for rapid fiber adhesion. The intermediate shafts at both ends of the winding roller 7 are rotatably connected to the U-shaped fixing frames through bearings and are fixedly connected to the servo motor drive shaft through snap ring buckles. The servo motor drives the winding roller 7 to rotate. The winding roller is connected by snap ring buckles, and pressing the buckles allows workers to easily disassemble the collected continuous fiber fabric roll for subsequent reuse. The servo motor drive ensures that the fibers have appropriate tension during the winding process to prevent the fibers from loosening. The fiber fabric recovered by the spraying component 1 is evenly wound onto the winding roller 7 for recycling. The resin collection chamber 5 is located at the tail of the carrier chamber 10. The resin collection chamber 5 is connected to the carrier chamber 10 through the bottom controller 8. When the resin in the carrier chamber 10 reaches the set viscosity value, the bottom controller 8 automatically opens and pours the resin into the resin collection chamber 5.

[0030] As a preferred embodiment of this utility model, it also includes a fiber recycling bin, which is set at the end of the conveying assembly 9 by a hydraulic lifting device. Continuous fibers are collected by the winding roller 7 and sent into the fiber recycling bin for convenient post-processing and later reuse.

[0031] The implementation method of this utility model is as follows: The recycling device is transported to the site of the decommissioned composite products, and a relatively flat ground is selected for laying the device. The front end of the composite product is transported to the conveyor assembly 9, and the composite product is pushed into the spray assembly 1 by the bottom motor. The top spray pipe 2 sprays methyl methacrylate (MMA) from the carrying chamber onto the composite product, and the liquid resin flows into the bottom carrying chamber 10. The bottom power pump continuously draws the liquid resin in the carrying chamber 10 to the top and sprays it down from the spray head 3. This cycle continues until the resin and fiber of the front end of the composite product are separated. The resin in the carrying chamber 10 is continuously tested by the bottom viscosity sensor. After reaching a certain viscosity, it is collected in the resin collection chamber 5. The continuous fiber is collected by the winding roller 7 and sent into the fiber recycling chamber for post-processing and later reuse. After the front end of the composite product is recycled, the composite product is pushed forward one by one, and the untreated part is placed in the recycling device for recycling. This cycle continues.

[0032] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A progressive recycling device for large PMMA composite products, characterized by, Including conveying assembly (9), spray assembly (1) and recycling assembly (6), the spray assembly (1) and recycling assembly (6) are sequentially fixed on conveying assembly (9), the conveying assembly (9) is provided with a leakage plate (11), the leakage plate (11) is uniformly distributed with a plurality of holes, the bottom of the conveying assembly (9) is provided with a bearing bin (10), the bearing bin (10) contains flushing liquid, the bearing bin (10) is provided with a power pump, the spray assembly (1) is communicated with the power pump.

2. A device for progressive recycling of large PMMA composite products according to claim 1, characterized in that, The top and both sides of the spray assembly (1) are provided with spray pipes (2), and the spray head (3) is installed on the spray pipe (2) at the top.

3. A device for progressive recycling of large PMMA composite products according to claim 1, characterized in that, The flushing liquid is methyl methacrylate.

4. A device for progressive recycling of large PMMA composite products according to claim 1, characterized in that, It also includes a viscosity sensor (4) arranged in the bearing bin (10).

5. A device for progressive recycling of large PMMA composite products according to claim 1, characterized in that, The recycling assembly (6) includes a winding roller (7), a resin collection bin (5) and a bottom controller (8), the winding roller (7) is arranged at the tail of the conveying assembly (9) for collecting continuous fiber fabric, the resin collection bin (5) is arranged at the tail of the bearing bin (10), and the resin collection bin (5) is communicated with the bearing bin (10) through the bottom controller (8).

6. A device for the progressive recycling of large PMMA composite products according to claim 5, characterized in that, Both ends of the winding roller (7) are provided with U-shaped fixing frames arranged on the conveying assembly (9), and the intermediate shafts of both ends of the winding roller (7) are rotatably connected with the U-shaped fixing frames through bearings.

7. A device for progressive recycling of large PMMA composite products according to claim 5, characterized in that, The surface of the winding roller (7) is provided with knurling texture for rapid adhesion of fibers.

8. A device for progressive recycling of large PMMA composite products according to claim 5, characterized in that, The winding roller (7) is fixedly connected with a servo motor driving shaft through a snap ring type buckle, and the winding roller (7) is driven to rotate by a servo motor.

9. A device for progressive recycling of large PMMA composite products according to claim 1, characterized in that, It also includes a fiber recovery bin arranged at the end of the conveying assembly (9) through a hydraulic lifting device.

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