Aqueous polyurethane dispersion prepreg device

Abstract

This utility model relates to the field of prepolymerization device technology and discloses an aqueous polyurethane dispersion prepolymerization device, including a prepolymerization tank. A frame is fixedly connected to the upper exterior of the prepolymerization tank, and support mechanisms are fixedly connected to the four corners of the bottom of the frame. A tank cover is installed on the top surface of the prepolymerization tank. This aqueous polyurethane dispersion prepolymerization device, through the setting of the support mechanisms, allows the frame to be installed below the prepolymerization tank when the device is to be used. The frame surrounds the prepolymerization tank in the middle, and hydraulic support legs that can be moved up and down to adjust the support height are installed at the four corners of the bottom of the frame. Stabilizing plates are installed at the bottom of the hydraulic support legs to increase the contact area with the ground, thereby increasing the support strength. This prevents the reactor from tilting significantly after a period of operation due to insufficient support strength of the tank itself, which would not only lead to uneven mixing of materials and affect product quality but also potentially cause safety accidents.

Description

Technical Field

[0001] This utility model relates to the field of prepolymerization device technology, and in particular to a waterborne polyurethane dispersion prepolymerization device. Background Technology

[0002] Waterborne polyurethane dispersions, as a green and environmentally friendly polymer material, have been widely used in many fields. They use water instead of organic solvents as the dispersion medium for polyurethane, do not contain volatile organic solvents, and are odorless and non-toxic. During use, as the water evaporates, a thin film with properties comparable to polyurethane materials is formed, exhibiting excellent physicochemical properties.

[0003] Traditional waterborne polyurethane dispersion prepolymerization devices often employ simple stirring structures. For waterborne polyurethane prepolymerization systems with a wide viscosity range, it is difficult to achieve uniform stirring throughout the entire reactor. As the reaction proceeds, the viscosity increases, and the flow of materials within the reactor becomes more complex. Ordinary stirring racks cannot effectively promote material circulation, resulting in insufficient mixing in some areas and inconsistent reaction progress. In dead zones such as the edges and bottom of the reactor, materials are prone to stagnation, and the reaction rate is significantly lower than in other areas. This not only affects the overall performance of the product but may also lead to significant batch-to-batch quality differences. Utility Model Content

[0004] The purpose of this invention is to provide a waterborne polyurethane dispersion prepolymerization device to solve the problems of unstable support and sedimentation during stirring mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waterborne polyurethane dispersion prepolymerization device, comprising a prepolymerization tank, a frame fixedly connected to the upper exterior of the prepolymerization tank, support mechanisms fixedly connected to the four corners of the bottom of the frame, a tank cover installed on the top surface of the prepolymerization tank, a stirring mechanism installed on the top surface of the tank cover, the support mechanism comprising hydraulic support legs fixedly connected to the four corners of the bottom of the frame, a reinforcing rod fixedly connected to the upper end of the hydraulic support legs, a stabilizing plate fixedly connected to the bottom surface of the hydraulic support legs, the stirring mechanism comprising a connector A installed on the top surface of the tank cover, a drive motor installed on the top surface of the connector A, a rotating column rotatably connected to the bottom of the connector A, stirring racks fixedly connected to both sides of the rotating column, a micro motor installed inside the lower end of the rotating column, and a central mixing column installed at the bottom of the micro motor.

[0006] As a further embodiment of this utility model, side stirring rods are fixedly connected to both sides of the stirring rack, and three stirring side plates are fixedly connected to the inner side of the side stirring rods. The stirring side plates are arranged to achieve the effect of uniform stirring from the side.

[0007] As a further embodiment of this utility model, a wall scraper is fixedly connected to the outer side of the side stirring rod. The wall scraper is slidably connected to the inner wall of the prepolymer tank. The wall scraper prevents residues on the tank wall from being unable to be stirred.

[0008] As a further embodiment of this utility model, a rotating component B is rotatably connected to the top surface of the mixing column, and mixing plates are fixedly connected around the perimeter of the mixing column. The mixing plates serve to achieve reverse mixing in the middle, thereby increasing the mixing degree.

[0009] As a further embodiment of this utility model, a bottom stirring rod is fixedly connected to the bottom of the stirring rack, and a bottom scraper is fixedly connected to the bottom surface of the bottom stirring rod. The bottom scraper serves to scrape up and stir the sediment at the bottom.

[0010] As a further embodiment of this utility model, a liquid inlet head is fixedly connected to the right side of the top surface of the prepolymer tank, and a liquid inlet cap is installed at the top of the liquid inlet head. The liquid inlet head serves to inject liquid.

[0011] As a further embodiment of this utility model, a liquid outlet pipe is provided at the bottom of the prepolymer tank, and a liquid outlet valve is provided outside the liquid outlet pipe. The liquid outlet valve is designed to control the liquid flow.

[0012] This invention provides a prepolymerization device for an aqueous polyurethane dispersion, which has the following advantages:

[0013] 1. This waterborne polyurethane dispersion prepolymerization device, through the setting of the support mechanism, has a platform installed below the prepolymerization tank when the device is to be used. The platform surrounds the prepolymerization tank in the middle, and then hydraulic support legs that can be moved up and down to adjust the support height are installed at the four corners of the bottom of the platform. Stabilizing plates are installed at the bottom of the hydraulic support legs to increase the contact area with the ground and increase the support strength. This avoids the reactor from tilting significantly after a period of operation due to insufficient support strength of the tank itself, which would not only lead to uneven mixing of materials and affect product quality, but also may cause safety accidents.

[0014] 2. This waterborne polyurethane dispersion prepolymerization device, through the setting of the stirring mechanism, has a drive motor installed on the top surface of the prepolymerization tank. The drive motor is connected to the rotating column below through adapter A. Stirring racks are installed on both sides of the rotating column. The stirring side blades on the stirring racks rotate and stir. The wall scrapers on both sides and the bottom scraper can scrape off the deposits attached to the inner wall of the tank. Then, a micro motor is installed inside the rotating column. The micro motor is connected to the intermediate mixing column below, so that the intermediate mixing column can carry the intermediate mixing blades around its perimeter and rotate and stir in the middle in the opposite direction to the stirring rack. It plays a role in bidirectional stirring and preventing residue. It avoids the problem that a single stirring structure can cause material to stagnate in dead corners such as the inner edge and bottom of the tank, and the material in some areas may not be mixed sufficiently. The reaction process is inconsistent and the reaction rate is significantly lower than that of other areas. This not only affects the overall performance of the product, but may also lead to large quality differences between batches. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the support mechanism structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the stirring mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the prepolymer tank structure of this utility model.

[0019] In the diagram: 1. Prepolymer tank; 2. Stand; 3. Support mechanism; 301. Hydraulic support leg; 302. Reinforcing rod; 303. Stabilizing plate; 4. Tank cover; 5. Stirring mechanism; 501. Adapter A; 502. Rotating column; 503. Stirring frame; 504. Micro motor; 505. Central mixing column; 506. Drive motor; 6. Side mixing rod; 7. Side mixing plate; 8. Wall scraper; 9. Adapter B; 10. Central mixing plate; 11. Bottom mixing rod; 12. Bottom scraper; 13. Liquid inlet head; 14. Liquid inlet cover; 15. Liquid outlet pipe; 16. Liquid outlet valve. 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see Figures 1 to 4This utility model provides a technical solution for a waterborne polyurethane dispersion prepolymerization device: A prepolymerization tank 1 is provided, with a frame 2 fixedly connected to the upper exterior of the tank 1. Support mechanisms 3 are fixedly connected to the four corners of the bottom of the frame 2. A tank cover 4 is installed on the top surface of the tank 1, and a stirring mechanism 5 is installed on the top surface of the tank cover 4. The support mechanism 3 includes hydraulic support legs 301 fixedly connected to the four corners of the bottom of the frame 2. A reinforcing rod 302 is fixedly connected to the upper end of the hydraulic support leg 301, and a stabilizing plate 303 is fixedly connected to the bottom surface of the hydraulic support leg 301. The stirring mechanism 5 includes a connector A501 installed on the top surface of the tank cover 4, and a drive motor 506 is installed on the top surface of the connector A501. A rotating column 502 is rotatably connected to the bottom of 501. A stirring rack 503 is fixedly connected to both sides of the rotating column 502. A micro motor 504 is installed inside the lower end of the rotating column 502. A central mixing column 505 is installed at the bottom of the micro motor 504.

[0022] Please see Figure 3 Both sides of the mixing rack 503 are fixedly connected with side mixing rods 6, and three mixing side plates 7 are fixedly connected to the inner side of the side mixing rods 6. The mixing side plates 7 are set to achieve uniform mixing from the side.

[0023] Please see Figure 3 A wall scraper 8 is fixedly connected to the outside of the side stirring rod 6. The wall scraper 8 is slidably connected to the inner wall of the prepolymer tank 1. The wall scraper 8 is designed to prevent residues on the tank wall from being unable to be stirred.

[0024] Please see Figure 3 The top surface of the mixing column 505 is rotatably connected to the rotating part B9, and the mixing plate 10 is fixedly connected around the circumference of the mixing column 505. The mixing plate 10 plays a role in reverse mixing in the middle and increasing the mixing degree.

[0025] Please see Figure 3 The bottom of the mixing rack 503 is fixedly connected to a bottom mixing rod 11, and the bottom surface of the bottom mixing rod 11 is fixedly connected to a bottom scraper 12. The bottom scraper 12 is used to scrape up and stir the bottom sediment.

[0026] Please see Figure 1 A liquid inlet head 13 is fixedly connected to the right side of the top surface of the prepolymer tank 1. A liquid inlet cover 14 is installed at the top of the liquid inlet head 13. The liquid inlet head 13 serves to inject liquid.

[0027] Please see Figure 2 The bottom of the prepolymer tank 1 is connected to a liquid outlet pipe 15, and the outside of the liquid outlet pipe 15 is connected to a liquid outlet valve 16. The liquid outlet valve 16 is used to control the liquid flow.

[0028] In this invention, the working steps of the device are as follows:

[0029] First step: A platform 2 was installed below the prepolymer tank 1. The platform 2 surrounds the prepolymer tank 1 in the middle. Then, hydraulic support legs 301 that can be moved up and down to adjust the support height were installed at the four corners of the bottom of the platform 2. A stabilizing plate 303 was installed at the bottom of the hydraulic support legs 301 to increase the contact area with the ground.

[0030] The second step: A drive motor 506 is installed on the top surface of the prepolymer tank 1. The drive motor 506 is connected to the rotating column 502 below via an adapter A501. A stirring rack 503 is installed on both sides of the rotating column 502. The stirring side blades 7 on the stirring rack 503 rotate and stir. The wall scrapers 8 on both sides and the bottom, as well as the bottom scraper 12, can scrape off the deposits attached to the inner wall of the tank. Then, a micro motor 504 is installed inside the rotating column 502. The micro motor 504 is connected to the intermediate mixing column 505 below, so that the intermediate mixing column 505 can rotate and stir in the middle in the opposite direction to the stirring rack 503, along with the intermediate mixing blades 10 on its outer perimeter.

[0031] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0032] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0033] 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. An aqueous polyurethane dispersion prepoly device comprising a prepoly tank (1), characterized in that: A frame (2) is fixedly connected to the upper exterior of the prepolymer tank (1), and a support mechanism (3) is fixedly connected to the four corners of the bottom of the frame (2). A tank cover (4) is installed on the top surface of the prepolymer tank (1), and a stirring mechanism (5) is installed on the top surface of the tank cover (4). The support mechanism (3) includes hydraulic support legs (301) fixedly connected to the four corners of the bottom of the platform (2). The upper end of the hydraulic support leg (301) is fixedly connected to a reinforcing rod (302), and the bottom surface of the hydraulic support leg (301) is fixedly connected to a stabilizing plate (303). The stirring mechanism (5) includes a connector A (501) installed on the top surface of the tank cover (4). A drive motor (506) is installed on the top surface of the connector A (501). A rotating column (502) is rotatably connected to the bottom of the connector A (501). A stirring rack (503) is fixedly connected to both sides of the rotating column (502). A micro motor (504) is installed inside the lower end of the rotating column (502). A central mixing column (505) is installed at the bottom of the micro motor (504).

2. The waterborne polyurethane dispersion prepoly device of claim 1, wherein: The bottom sides of the stirring rack (503) are fixedly connected with side stirring rods (6), and three stirring side plates (7) are fixedly connected to the inner side of the side stirring rods (6).

3. A waterborne polyurethane dispersion prepoly device according to claim 2, wherein: A wall scraper (8) is fixedly connected to the outside of the side stirring rod (6), and the wall scraper (8) is slidably connected to the inner wall of the prepolymer tank (1).

4. The apparatus of claim 1, wherein: The top surface of the mixing column (505) is rotatably connected to a rotating component B (9), and the mixing plate (10) is fixedly connected around the mixing column (505).

5. The apparatus of claim 1, wherein: The bottom of the mixing rack (503) is fixedly connected to a bottom mixing rod (11), and the bottom surface of the bottom mixing rod (11) is fixedly connected to a bottom scraper (12).

6. The apparatus of claim 1, wherein: The top right side of the prepolymer tank (1) is fixedly connected to an inlet head (13), and an inlet cover (14) is installed on the top of the inlet head (13).

7. The apparatus of claim 1, wherein: The bottom of the prepolymer tank (1) is connected to a liquid outlet pipe (15), and a liquid outlet valve (16) is connected to the outside of the liquid outlet pipe (15).

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