A viscosity testing device for high-viscosity recycled bottle-grade PET

Abstract

This invention discloses a viscosity testing device for high-viscosity recycled bottle-grade PET, comprising a base plate, a back plate fixedly connected to the rear side of the top of the base plate, and a swing motor fixedly connected to the front side of the back plate. This invention uses a heating cylinder mechanism to add raw materials and solvents into the cylinder. A heating wire is activated to heat the raw materials. The swing motor drives the heating cylinder mechanism to swing, and the swing frequency and angle of the motor can be adjusted as needed. This agitates the raw materials and solvents inside the heating cylinder mechanism, ensuring uniform heating and improving the dissolution effect. After dissolution is complete, an electric telescopic rod can be activated to move the front end of the blocking plate downwards away from the outlet of the heating cylinder mechanism. The dissolved solvent flows into a recovery tank under gravity, facilitating viscosity testing using an Ubbelohde viscometer. This achieves the effect of ensuring the quality of the test solution and improving measurement stability and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of recycled bottle-grade PET technology, specifically a viscosity detection device for high-viscosity recycled bottle-grade PET. Background Technology

[0002] With the advancement of environmental protection policies and the popularization of the concept of resource recycling, the recycling industry of bottle-grade polyethylene terephthalate (PET) is booming. The viscosity parameter of high-viscosity recycled bottle-grade PET is a core indicator for measuring its quality, directly determining the stability and product qualification rate of subsequent molding processes such as blow molding and injection molding.

[0003] Currently, the traditional method for viscosity testing of high-viscosity recycled bottle-grade PET mainly involves manual sampling followed by measurement using an Ubbelohde viscometer. This method requires operators to manually mix the PET raw material with the solvent and then heat it to dissolve. This process is prone to problems such as uneven mixing and inaccurate temperature control, leading to unstable sample dissolution. Furthermore, manual operation is inefficient and makes rapid batch testing difficult.

[0004] Therefore, it is necessary to modify it by setting a heating cylinder mechanism to heat the raw material solvent at a constant temperature, and by swinging the heating cylinder mechanism to ensure that the raw material solution inside is heated evenly. After the PET raw material is completely and evenly dissolved, the heating cylinder mechanism is opened to allow it to flow out, thus ensuring the quality of the test solution and improving the stability and efficiency of the measurement. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a viscosity testing device for high-viscosity recycled bottle-grade PET. This device features a heating cylinder mechanism that maintains a constant temperature for the raw material solvent and ensures uniform heating of the internal solution by oscillating the heating cylinder mechanism. Once the PET raw material is completely and uniformly dissolved, the heating cylinder mechanism is opened to allow it to flow out, ensuring the quality of the test solution and improving measurement stability and efficiency. This solves the problems of uneven mixing and inaccurate temperature control during manual mixing and heating of PET raw material and solvent, leading to unstable sample dissolution and low efficiency in manual operation, making rapid batch testing difficult.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a viscosity testing device for high-viscosity recycled bottle-grade PET, comprising a base plate, a back plate fixedly connected to the rear side of the top of the base plate, a swing motor fixedly connected to the front side of the back plate, a crossbeam fixedly connected to the output end of the swing motor, a placement mechanism fixedly connected to the front end of the crossbeam, a heating cylinder mechanism disposed inside the placement mechanism, vertical rods hinged to the rear of both sides of the crossbeam, a blocking plate fixedly connected to the bottom of the vertical rods, a sealing ring fixedly connected to the front of the top of the blocking plate, the top of the sealing ring fitting against the bottom of the heating cylinder mechanism, an electric telescopic rod fixedly connected to the bottom of the crossbeam, a connecting seat hinged to the bottom end of the electric telescopic rod, the bottom of the connecting seat slidingly connected to the top of the blocking plate, a recycling cylinder disposed below the discharge port of the heating cylinder mechanism at the front of the top of the base plate, and a smooth, non-stick coating disposed on the inner wall of both the recycling cylinder and the inner wall of the heating cylinder mechanism.

[0007] As a preferred embodiment of this utility model, the placement mechanism includes a placement ring fixedly connected to the front end of the crossbeam. A friction pad is fixedly connected to the inner wall of the placement ring. The inner wall of the friction pad is in contact with the surface of the heating cylinder mechanism. Threaded holes are provided on both the left and right sides of the placement ring, and bolts are threadedly connected to the inside of the threaded holes. The inner end of the bolts is in contact with the surface of the heating cylinder mechanism.

[0008] As a preferred embodiment of this utility model, the heating cylinder mechanism includes an insulated barrel that is attached to the inner wall of the placement mechanism. A material cylinder is fixedly connected inside the insulated barrel. A heating wire located inside the insulated barrel is attached to the surface of the material cylinder. A sealing cap is threaded to the top of the material cylinder. A temperature sensor is provided at the bottom of the sealing cap. A pressure relief valve is connected to the right side of the sealing cap.

[0009] As a preferred embodiment of this utility model, stabilizing rods are fixedly connected to both the left and right sides of the back of the placement mechanism, and an annular guide rail is fixedly connected to the front of the back plate. The rear end of the stabilizing rod is slidably connected to the inner wall of the annular guide rail.

[0010] As a preferred embodiment of this utility model, a T-shaped block is fixedly connected to the bottom of the connecting seat, and a T-shaped groove is provided on the top of the blocking plate to cooperate with the T-shaped block. The surface of the T-shaped block is slidably connected to the inner wall of the T-shaped groove.

[0011] As a preferred embodiment of this utility model, a counterweight is fixedly connected to the bottom of the base plate, and a rubber pad is fixedly connected to the bottom of the counterweight, with anti-slip texture provided on the bottom of the rubber pad.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model incorporates a heating cylinder mechanism to add raw materials and solvents into the cylinder. The cylinder is then sealed with a cap, and a heating wire is activated to heat the raw materials. A swing motor drives the heating cylinder mechanism to swing, and the swing frequency and angle of the motor can be adjusted as needed. This agitates the raw materials and solvents inside the heating cylinder mechanism, ensuring uniform heating and improving the dissolution effect. After dissolution is complete, an electric telescopic rod can be activated to move the front end of the blocking plate downwards away from the outlet of the heating cylinder mechanism. The dissolved solvent flows into a recovery tank under the influence of gravity, facilitating viscosity testing using an Ubbelohde viscometer. This ensures the quality of the test solution and improves measurement stability and efficiency.

[0014] 2. This utility model can initially fix the heating cylinder mechanism by setting a friction pad on the inner wall of the placement ring, and then tighten it from both sides with bolts to form a double fixing effect, ensuring that the heating cylinder mechanism remains stable during swinging and heating, and preventing material spillage or uneven heating due to loosening; this detachable fixing method makes it convenient for operators to replace the heating cylinder mechanism according to different testing needs, improving the versatility and flexibility of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0017] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 4 This utility model Figure 2 A magnified structural diagram of A in the middle.

[0019] In the diagram: 1. Base plate; 2. Back plate; 3. Swing motor; 4. Crossbeam; 5. Placement mechanism; 6. Heating cylinder mechanism; 7. Vertical rod; 8. Blocking plate; 9. Sealing ring; 10. Electric telescopic rod; 11. Connecting seat; 12. Recycling cylinder; 13. Placement ring; 14. Friction pad; 15. Bolt; 16. Insulation tank; 17. Material cylinder; 18. Heating wire; 19. Sealing cover; 20. Temperature sensor; 21. Pressure relief valve; 22. Stabilizing rod; 23. Circular guide rail; 24. T-block; 25. T-slot; 26. Counterweight seat; 27. Rubber pad. Detailed Implementation

[0020] 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.

[0021] like Figures 1 to 4 As shown, this utility model provides a viscosity testing device for high-viscosity recycled bottle-grade PET, including a base plate 1, a back plate 2 fixedly connected to the rear side of the top of the base plate 1, a swing motor 3 fixedly connected to the front of the back plate 2, a crossbeam 4 fixedly connected to the output end of the swing motor 3, a placement mechanism 5 fixedly connected to the front end of the crossbeam 4, a heating cylinder mechanism 6 arranged inside the placement mechanism 5, vertical rods 7 hinged to the rear of both sides of the crossbeam 4, a blocking plate 8 fixedly connected to the bottom of the vertical rod 7, a sealing ring 9 fixedly connected to the front of the top of the blocking plate 8, the top of the sealing ring 9 fitting against the bottom of the heating cylinder mechanism 6, an electric telescopic rod 10 fixedly connected to the bottom of the crossbeam 4, a connecting seat 11 hinged to the bottom end of the electric telescopic rod 10, the bottom of the connecting seat 11 slidingly connected to the top of the blocking plate 8, a recycling cylinder 12 located below the discharge port of the heating cylinder mechanism 6 arranged in front of the top of the base plate 1, a smooth anti-stick coating provided on the inner wall of the recycling cylinder 12 and the inner wall of the heating cylinder mechanism 6, and a controller (not shown) arranged on the top of the base plate 1.

[0022] refer to Figure 3 The placement mechanism 5 includes a placement ring 13 fixedly connected to the front end of the crossbeam 4. A friction pad 14 is fixedly connected to the inner wall of the placement ring 13. The inner wall of the friction pad 14 is in contact with the surface of the heating cylinder mechanism 6. Threaded holes are provided on both the left and right sides of the placement ring 13, and bolts 15 are threadedly connected inside the threaded holes. The inner end of the bolts 15 is in contact with the surface of the heating cylinder mechanism 6.

[0023] As a technical optimization of this utility model, the heating cylinder mechanism 6 can be initially fixed by setting the friction pad 14 on the inner wall of the placement ring 13, and then tightened from both sides with bolts 15 to form a double fixing effect, ensuring that the heating cylinder mechanism 6 remains stable during swinging, heating and other processes, and preventing material spillage or uneven heating due to loosening; this detachable fixing method makes it convenient for operators to replace the heating cylinder mechanism 6 according to different testing needs, improving the versatility and flexibility of the device.

[0024] refer to Figure 3The heating cylinder mechanism 6 includes an insulated barrel 16 that is attached to the inner wall of the placement mechanism 5. A material cylinder 17 is fixedly connected inside the insulated barrel 16. A heating wire 18 located inside the insulated barrel 16 is attached to the surface of the material cylinder 17. A sealing cap 19 is threadedly connected to the top of the material cylinder 17. A temperature sensor 20 is provided at the bottom of the sealing cap 19. A pressure relief valve 21 is connected to the right side of the sealing cap 19.

[0025] As a technical optimization of this utility model, by setting up an insulated barrel 16 to wrap the material cylinder 17 and cooperating with the heating wire 18, heat loss can be effectively reduced, and constant temperature and precise heating of PET raw materials can be achieved. The temperature sensor 20 monitors the temperature inside the material cylinder 17 in real time, and can provide timely feedback and adjust the heating state to ensure the stability of the material dissolution process. The temperature sensor 20 at the bottom of the sealing cover 19 ensures the accuracy of temperature monitoring, and the pressure relief valve 21 on the right side can effectively prevent safety hazards caused by excessive pressure during the heating process, ensuring the safety of operators and equipment, and also providing a safe environment for the stable dissolution of materials.

[0026] refer to Figure 1 Stabilizing rods 22 are fixedly connected to both the left and right sides of the back of the placement mechanism 5, and an annular guide rail 23 is fixedly connected to the front of the back plate 2. The rear end of the stabilizing rods 22 is slidably connected to the inner wall of the annular guide rail 23.

[0027] As a technical optimization of this utility model, by setting the stabilizing rod 22 and the annular guide rail 23 together, the crossbeam 4 plays a guiding and stabilizing role during the swinging process, limiting the swaying amplitude of the crossbeam 4, making the swing trajectory of the heating cylinder mechanism 6 more accurate, avoiding abnormal material flow caused by swing deviation, thereby improving the consistency and accuracy of the detection data, and providing a stable operating environment for viscosity detection.

[0028] refer to Figure 4 The bottom of the connecting seat 11 is fixedly connected to a T-shaped block 24, and the top of the blocking plate 8 is provided with a T-shaped groove 25 that cooperates with the T-shaped block 24. The surface of the T-shaped block 24 is slidably connected to the inner wall of the T-shaped groove 25.

[0029] As a technical optimization of this utility model, by setting the T-shaped block 24 and T-shaped groove 25 in cooperation, a stable and precise sliding connection between the connecting seat 11 and the blocking plate 8 is achieved, so that the thrust of the electric telescopic rod 10 can be accurately transmitted to the blocking plate 8, ensuring that the blocking plate 8 moves smoothly, ensuring that the sealing ring 9 is tightly attached to or smoothly separated from the bottom of the heating cylinder mechanism 6, effectively controlling the material discharge process, and avoiding problems such as poor sealing or abnormal discharge caused by loose connection.

[0030] refer to Figure 1A counterweight 26 is fixedly connected to the bottom of the base plate 1, and a rubber pad 27 is fixedly connected to the bottom of the counterweight 26. The bottom of the rubber pad 27 is provided with anti-slip texture.

[0031] As a technical optimization of this utility model, the overall weight of the device is increased by setting a counterweight 26, which lowers the center of gravity of the device during operation and enhances stability; the anti-slip texture on the bottom of the rubber pad 27 increases the friction between the device and the placement surface, preventing the device from shifting or shaking during swinging, material flow, etc., further ensuring the safety of the detection process and the reliability of the detection results, especially suitable for vibration environments that may occur when detecting high-viscosity materials.

[0032] The working principle and usage process of this utility model are as follows: In use, the heating cylinder mechanism 6 containing a measured amount of PET raw material and solvent is placed into the placement ring 13 and initially fixed by the friction pad 14. The bolts 15 on both sides are then tightened for further security. The target temperature is set via the controller (usually the boiling point of the PET solvent, such as the boiling point of a phenol / tetrachloroethane mixed solvent, which is approximately 130°C). The heating wire 18 is activated, and the temperature sensor 20 provides real-time feedback on the temperature inside the cylinder 17. When the set value is reached, the control system automatically adjusts the heating power to maintain a constant temperature. Then, the swing motor 3 is activated, and the swing frequency is set. The angle range is adjusted to accelerate material dissolution, which typically takes 15-30 minutes until the material is completely dissolved. Once the material is completely dissolved, the oscillation is stopped, and the Ubbelohde viscometer is installed above the recovery cylinder 12 (or placed inside the recovery cylinder 12 beforehand). Then, the electric telescopic rod 10 is activated to extend and push the blocking plate 8 downward, causing the sealing ring 9 to disengage from the outlet. The solution flows into the recovery cylinder 12. A stopwatch is used to record the time it takes for the solution to pass through the capillary of the Ubbelohde viscometer. The intrinsic viscosity is calculated according to the Ubbelohde viscometer formula η = K·t (where K is the viscometer constant and t is the solution outflow time).

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A viscosity detection device for high viscosity recycled bottle grade PET, comprising a base plate (1), characterized in that: A back plate (2) is fixedly connected to the rear side of the top of the base plate (1). A swing motor (3) is fixedly connected to the front of the back plate (2). A crossbeam (4) is fixedly connected to the output end of the swing motor (3). A placement mechanism (5) is fixedly connected to the front end of the crossbeam (4). A heating cylinder mechanism (6) is provided inside the placement mechanism (5). Vertical rods (7) are hinged to the rear of both sides of the crossbeam (4). A blocking plate (8) is fixedly connected to the bottom of the vertical rod (7). A sealing device is fixedly connected to the front of the top of the blocking plate (8). The top of the sealing ring (9) is attached to the bottom of the heating cylinder mechanism (6). The bottom of the crossbeam (4) is fixedly connected to an electric telescopic rod (10). The bottom end of the electric telescopic rod (10) is hinged to a connecting seat (11). The bottom of the connecting seat (11) is slidably connected to the top of the blocking plate (8). A recycling cylinder (12) is provided in front of the top of the bottom plate (1) and located below the discharge port of the heating cylinder mechanism (6). The inner wall of the recycling cylinder (12) and the inner wall of the heating cylinder mechanism (6) are both provided with a smooth non-stick coating.

2. A viscosity detection device for high viscosity rPET bottle grade PET as claimed in claim 1, wherein: The placement mechanism (5) includes a placement ring (13) fixedly connected to the front end of the crossbeam (4). A friction pad (14) is fixedly connected to the inner wall of the placement ring (13). The inner wall of the friction pad (14) is in contact with the surface of the heating cylinder mechanism (6). Threaded holes are provided on both the left and right sides of the placement ring (13), and bolts (15) are threaded inside the threaded holes. The inner end of the bolts (15) is in contact with the surface of the heating cylinder mechanism (6).

3. A viscosity detection device for high viscosity rPET bottle grade PET as claimed in claim 1, wherein: The heating cylinder mechanism (6) includes a heat-insulating barrel (16) attached to the inner wall of the placement mechanism (5). A material cylinder (17) is fixedly connected inside the heat-insulating barrel (16). A heating wire (18) located inside the heat-insulating barrel (16) is attached to the surface of the material cylinder (17). A sealing cap (19) is threadedly connected to the top of the material cylinder (17). A temperature sensor (20) is provided at the bottom of the sealing cap (19). A pressure relief valve (21) is connected to the right side of the sealing cap (19).

4. A viscosity detection device for high viscosity rPET bottle grade PET as claimed in claim 1, wherein: Stabilizing rods (22) are fixedly connected to both the left and right sides of the back of the placement mechanism (5), and an annular guide rail (23) is fixedly connected to the front of the back plate (2). The rear end of the stabilizing rod (22) is slidably connected to the inner wall of the annular guide rail (23).

5. A viscosity detection device for high viscosity rPET bottle grade PET as claimed in claim 1, wherein: The bottom of the connecting seat (11) is fixedly connected to a T-shaped block (24), and the top of the blocking plate (8) is provided with a T-shaped groove (25) that cooperates with the T-shaped block (24). The surface of the T-shaped block (24) is slidably connected to the inner wall of the T-shaped groove (25).

6. A viscosity detection device for high viscosity rPET bottle grade PET as claimed in claim 1, wherein: The bottom of the base plate (1) is fixedly connected to a counterweight seat (26), and the bottom of the counterweight seat (26) is fixedly connected to a rubber pad (27), and the bottom of the rubber pad (27) is provided with anti-slip texture.

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