Polyurethane coating dehydration device

Abstract

The utility model belongs to the technical field of polyurethane coating processing, and discloses a polyurethane coating dehydration device, which comprises a valve body, a dehydration structure assembled on the top surface of the valve body and inside the valve body, and a heat recovery structure positioned outside the valve body, the heat recovery structure comprises an air pump, a recovery pipe communicated with the input end of the air pump, a heater located on the right side of the valve body and a drainage box, through the design of the dewatering structure and the heat recovery structure, when the polyurethane coating is dewatered, the vacuum pump rapidly operates, the original standard air pressure in the valve body is rapidly pumped to 0.5 standard air pressure, and the dewatering efficiency is improved. As considerable heat is still reserved, the gas is guided to flow to the heater, in the heater, the gas is further heated to increase the temperature, so that the heat energy quality of the gas is enhanced, then, the heated gas smoothly flows to the flow dividing pipe through the well-designed backflow pipe, and finally, the heated gas accurately enters the valve body again. And efficient recovery and cyclic utilization of heat energy are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyurethane coating processing, in particular to a polyurethane coating dehydration device. Background Art

[0002] The preparation principle of polyurethane waterproof coating is that the hydroxyl groups in polyether react with isocyanate to form a prepolymer (single component). After that, the prepolymer absorbs moisture from the air and further reacts. With the help of the cross-linking effect of internal molecules, it finally forms a high-molecular waterproof coating with waterproof function. Therefore, during the production stage of the prepolymer, the amount of water in the production process must be strictly controlled. If water accidentally enters the reaction process, it will have a negative impact on the quality and output of the prepolymer, and thus affect the overall performance and production efficiency of the polyurethane waterproof coating.

[0003] The existing polyurethane coating dehydration device has the following shortcomings: when heat recovery operation is carried out, heat energy is often discharged along with water vapor. Subsequently, during the process of transmission and guidance through the pipeline, due to the thermal conductivity of the pipeline and the influence of the surrounding environment, a certain degree of heat energy loss will inevitably occur. This heat energy loss not only reduces the total amount of recyclable heat energy, but may also affect the stability and reliability of the entire heat energy recovery system. What is more serious is that when the temperature of the recovered heat is at a low level, even lower than the heat of the valve body itself, it will trigger a reverse heat transfer process, and some of the water vapor that should have been discharged will follow the gas back into the valve body, resulting in a poor dehydration effect. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a polyurethane coating dehydration device, comprising a valve body and a dehydration structure assembled on the top surface of the valve body and inside the valve body, and a heat recovery structure located outside the valve body;

[0005] The heat recovery structure includes an air pump and a recovery pipe connected to the air pump input end, as well as a heater and a drainage box located on the right side of the valve body. The output end of the air pump is connected to a transmission pipe, and the other end of the transmission pipe is connected to the membrane separation device body. The drainage port of the membrane separation device body is connected to a drainage pipe, and the exhaust port of the membrane separation device body is connected to an exhaust pipe. The outside of the air pump and the membrane separation device body are both provided with mounting seats, and the mounting seats are fixedly installed on the outer wall of the valve body.

[0006] Preferably, the other end of the drain pipe is connected to the drain tank, and the other end of the exhaust pipe is connected to the input end of the heater.

[0007] Preferably, the output end of the heater is connected to a return pipe, a plurality of branch pipes are provided on the outer wall of the return pipe, and the other end of the branch pipe is connected to the valve body.

[0008] Preferably, the dehydration structure includes a processing tank and an installation tank opened inside the valve body and a sealing cover assembled on the top of the valve body, as well as a servo motor and a vacuum pump assembled on the top of the sealing cover. The output end of the servo motor passes through the sealing cover and is fixedly connected to a stirring rod. The input end of the vacuum pump is connected to an exhaust pipe, and the other end of the exhaust pipe is connected to the valve body.

[0009] Preferably, a thermometer and a feeding tube are further provided on the top surface of the sealing cover, and the polyurethane coating can enter the processing tank provided inside the valve body through the feeding tube.

[0010] Preferably, a feed pipe is provided at the bottom of the valve body and a solenoid valve is provided outside the feed pipe, and electric heating wires distributed in a circular array are installed on the inner wall of the installation groove.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] The utility model adopts the design of dehydration structure and heat energy recovery structure, so that when the polyurethane coating is dehydrated, the servo motor is started to drive the stirring rod to rotate at high speed, and the stirring rod stirs the polyurethane coating in all directions in the valve body, so that the coating is fully mixed and turned. At the same time, the vacuum pump operates rapidly to quickly extract the original 1 standard atmospheric pressure in the valve body to 0.5 standard atmospheric pressure. The creation of this low-pressure environment greatly reduces the boiling point of water. Then, the electric heating wire is energized and heated. Under the synergistic effect of stirring and low pressure, the moisture in the coating is quickly converted into steam and begins to rise. At this time, the air pump is started to effectively extract this part of the gas mixture into the membrane separation device body. Water vapor separation is achieved in the process, and the remaining gas separated, since it still retains considerable heat, is guided to the heater. In the heater, the gas is further heated to increase its temperature, thereby enhancing its thermal energy quality. Subsequently, the heated gas flows smoothly to the diversion pipe through a carefully designed return pipe, and finally enters the valve body again accurately. In this way, not only the efficient recovery and recycling of heat energy is achieved, energy waste is reduced, and production costs are lowered, but it also helps to maintain the temperature stability inside the valve body and the consistency of the process environment, laying a solid foundation for the production of high-quality polyurethane coatings and greatly improving the economy and sustainability of the entire production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2This is a schematic diagram of the top section three-dimensional structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the stirring rod of the utility model;

[0017] Figure 5 This is a schematic diagram of the top section structure of the present invention.

[0018] In the figure: 1. Valve body; 11. Feeding pipe; 2. Dehydration structure; 21. Sealing cover; 22. Servo motor; 23. Vacuum pump; 24. Stirring rod; 25. Exhaust pipe; 26. Thermometer; 27. Feeding pipe; 28. Electric heating wire; 3. Heat recovery structure; 31. Air pump; 32. Recovery pipe; 33. Heater; 331. Reflux pipe; 332. Diverter pipe; 34. Drain box; 35. Transfer pipe; 36. Membrane separation device body; 37. Drain pipe; 38. Exhaust pipe; 39. Mounting seat. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 5 As shown, the utility model provides a polyurethane coating dehydration device, comprising a valve body 1, a dehydration structure 2 assembled on the top surface of the valve body 1 and inside the valve body 1, and a heat recovery structure 3 located outside the valve body 1;

[0021] The heat recovery structure 3 includes an air pump 31 and a recovery pipe 32 connected to the input end of the air pump 31, as well as a heater 33 and a drainage box 34 located on the right side of the valve body 1. The output end of the air pump 31 is connected to a transmission pipe 35, and the other end of the transmission pipe 35 is connected to a membrane separation device body 36. The drainage port of the membrane separation device body 36 is connected to a drainage pipe 37 and the exhaust port of the membrane separation device body 36 is connected to an exhaust pipe 38. A mounting seat 39 is provided on the outside of the air pump 31 and the membrane separation device body 36, and the mounting seat 39 is fixedly installed on the outer wall of the valve body 1.

[0022] The above scheme is adopted: through the design of the dehydration structure 2 and the heat energy recovery structure, when the polyurethane coating is dehydrated, the servo motor 22 is started to drive the stirring rod 24 to rotate at a high speed, and the stirring rod 24 stirs the polyurethane coating in all directions in the valve body 1, so that the coating is fully mixed and turned, ensuring that the internal moisture can be separated more smoothly. At the same time, the vacuum pump 23 operates rapidly to quickly extract the original 1 standard atmospheric pressure in the valve body 1 to 0.5 standard atmospheric pressure. The creation of this low-pressure environment greatly reduces the boiling point of water, creating extremely favorable conditions for subsequent heating and dehydration. Immediately afterwards, the electric heating wire 28 is energized and heated. Under the synergistic effect of stirring and low pressure, the moisture in the coating is quickly converted into steam form and begins to rise. At this time, the air pump 31 is accurately started to powerfully extract this part of the water vapor and gas mixture carrying a large amount of heat to the membrane separation device body 36. In the separation device body 36, the difference in permeability of special membrane materials to gas and water vapor is utilized to allow water vapor to pass through the membrane while gas cannot, thereby realizing the separation of water vapor and gas. The remaining separated gas, since it still retains considerable heat, is guided to flow to the heater 33. In the heater 33, the gas is further heated to increase its temperature, thereby enhancing its thermal energy quality. Subsequently, the heated gas flows smoothly to the diversion pipe 332 through the carefully designed return pipe 331, and finally accurately enters the interior of the valve body 1 again. In this way, not only the efficient recovery and recycling of heat energy is realized, energy waste is reduced, and production costs are reduced, but it also helps to maintain the temperature stability inside the valve body 1 and the consistency of the process environment, laying a solid foundation for the production of high-quality polyurethane coatings and greatly improving the economy and sustainability of the entire production process.

[0023] like Figures 1 to 5 As shown, the other end of the drain pipe 37 is connected to the drain box 34, the other end of the exhaust pipe 38 is connected to the input end of the heater 33, and the output end of the heater 33 is connected to the return pipe 331. A plurality of diversion pipes 332 are provided on the outer wall of the return pipe 331, and the other end of the diversion pipe 332 is connected to the valve body 1.

[0024] Adopting the above solution: The core of the membrane separation technology used in the membrane separation device body 36 is the use of specially developed membrane materials. This membrane material has a unique microstructure and physical and chemical properties, and can accurately utilize the difference in permeability between gas and water vapor in it. When the membrane separation device is in operation, water vapor molecules can relatively easily pass through the membrane material due to their smaller molecular size, higher polarity and other characteristics, while gas molecules are blocked due to weak interaction with the membrane material or large molecular size. This effectively achieves the precise separation of water vapor and gas. To further improve the heat recovery efficiency of the entire system, multiple diverter tubes 332 shell structures are specially designed. These diverter tubes 332 shells are evenly distributed and can accurately transfer the recovered heat to the valve body 1. Through this multi-path, targeted heat transfer method, all parts of the valve body 1 can fully benefit from the recovered heat, avoiding local heat excess or deficiency, thereby greatly optimizing the uniformity of heat distribution in the valve body 1, comprehensively improving the overall effect of heat recovery, reducing ineffective heat loss, and improving the comprehensive utilization rate of energy.

[0025] like Figures 1 to 5 As shown, the dehydration structure 2 includes a processing tank and an installation tank opened inside the valve body 1 and a sealing cover 21 assembled on the top of the sealing cover 21, as well as a servo motor 22 and a vacuum pump 23 assembled on the top of the sealing cover 21. The output end of the servo motor 22 passes through the sealing cover 21 and is fixedly connected to a stirring rod 24. The input end of the vacuum pump 23 is connected to an exhaust pipe 25, and the other end of the exhaust pipe 25 is connected to the valve body 1. A thermometer 26 and a feeding pipe 27 are also provided on the top surface of the sealing cover 21. The polyurethane coating can enter the processing tank opened inside the valve body 1 through the feeding pipe 27.

[0026] The above solution is adopted: the servo motor 22 rotates to make the stirring rod 24 stir the polyurethane coating in the valve body 1 in an all-round, uniform and powerful manner, so that the coating is fully mixed and turned, ensuring that the internal moisture can be separated more smoothly.

[0027] like Figures 1 to 5 As shown, a feed pipe 11 is provided at the bottom of the valve body 1 and a solenoid valve is provided outside the feed pipe 11 , and electric heating wires 28 distributed in a circular array are installed on the inner wall of the installation groove.

[0028] Adopting the above scheme: the polyurethane coating after dehydration is completed can be discharged through the discharge pipe 11, and the solenoid valve can accurately control the discharge amount and discharge time. After the electric heating wire 28 is energized, it generates heat to heat the valve body 1. An insulation pad is installed on the inner wall of the installation groove and away from the processing tank, so that most of the heat of the electric heating wire 28 will be transferred to the processing tank.

[0029] The working principle and use process of this utility model:

[0030] First, the polyurethane coating is added to the processing tank opened inside the valve body 1 through the feeding pipe 27, and then the sealing cover 21 is closed, and then the vacuum pump 23 is started. The vacuum pump 23 quickly extracts the air pressure in the valve body 1 from 1 standard atmosphere to 0.5 standard atmosphere through the exhaust pipe 25, creating a low-pressure environment and lowering the boiling point of water. Then the servo motor 22 is started, and the servo motor 22 drives the stirring rod 24 to rotate at high speed in the valve body 1, stirring the polyurethane coating in an all-round, uniform and powerful manner, so that the coating is fully mixed and turned, making it easier to separate the internal moisture. At the same time, the electric heating wire 28 in the installation tank is energized and heated. Under the synergistic effect of stirring and low pressure, the moisture in the coating is quickly converted into steam and begins to rise. At this time, the air pump 31 is started, and the water vapor and gas mixture carrying a large amount of heat is passed through the recovery pipe 3 2 is extracted to the membrane separation device body 36. In the membrane separation device body 36, special membrane materials are used to allow water vapor to pass through the membrane while the gas is blocked, thereby achieving water vapor separation. The separated water flows into the drainage box 34 through the drain pipe 37, and the remaining gas flows into the heater 33 through the exhaust pipe 38. In the heater 33, the gas is further heated to increase the temperature. Thereafter, the heat is accurately transferred to different parts of the valve body 1 through the return pipe 331 and multiple branch pipes 332, so that each part of the valve body 1 can fully benefit from the recovered heat and optimize the uniformity of heat distribution. Finally, the dehydrated polyurethane coating can be discharged through the discharge pipe 11 with a solenoid valve at the bottom. The solenoid valve can accurately control the discharge amount and discharge time, thereby completing the entire polyurethane coating dehydration and heat recovery process, ensuring efficient production, energy saving and stable product quality.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyurethane coating dehydration device, characterized in that: It comprises a valve body (1), a dehydration structure (2) assembled on the top surface of the valve body (1) and inside the valve body (1), and a heat recovery structure (3) located outside the valve body (1); The heat recovery structure (3) includes an air pump (31) and a recovery pipe (32) connected to the input end of the air pump (31), a heater (33) and a drainage box (34) located on the right side of the valve body (1), the output end of the air pump (31) is connected to a transmission pipe (35), the other end of the transmission pipe (35) is connected to the membrane separation device body (36), the drainage port of the membrane separation device body (36) is connected to a drainage pipe (37), and the exhaust port of the membrane separation device body (36) is connected to an exhaust pipe (38), and the outside of the air pump (31) and the membrane separation device body (36) are both provided with a mounting seat (39), and the mounting seat (39) is fixedly installed on the outer wall of the valve body (1).

2. A polyurethane coating dehydration device according to claim 1, characterized in that: The other end of the drainage pipe (37) is connected to the drainage box (34), and the other end of the exhaust pipe (38) is connected to the input end of the heater (33).

3. A polyurethane coating dehydration device according to claim 2, characterized in that: The output end of the heater (33) is connected to a return pipe (331), and a plurality of branch pipes (332) are provided on the outer wall of the return pipe (331), and the other end of the branch pipe (332) is connected to the valve body (1).

4. The polyurethane coating dehydration device according to claim 1, characterized in that: The dehydration structure (2) comprises a processing tank and a mounting tank provided inside the valve body (1), a sealing cover (21) mounted on top of the valve body (1), and a servo motor (22) and a vacuum pump (23) mounted on top of the sealing cover (21). The output end of the servo motor (22) passes through the sealing cover (21) and is fixedly connected to a stirring rod (24). The input end of the vacuum pump (23) is connected to an exhaust pipe (25), and the other end of the exhaust pipe (25) is connected to the valve body (1).

5. The polyurethane coating dehydration device according to claim 4, characterized in that: The top surface of the sealing cover (21) is also provided with a thermometer (26) and a feeding pipe (27), and the polyurethane coating can enter the processing tank opened inside the valve body (1) through the feeding pipe (27).

6. The polyurethane coating dehydration device according to claim 4, characterized in that: A discharge pipe (11) is provided at the bottom of the valve body (1), and a solenoid valve is provided outside the discharge pipe (11). Electric heating wires (28) distributed in a circular array are installed on the inner wall of the installation groove.

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