Polyurethane waterproof coating production device

Abstract

The utility model relates to a polyurethane waterproof coating production device, and relates to the field of waterproof coating production equipment.The polyurethane waterproof coating production device comprises a dispersing kettle, a powder feeding assembly is arranged on the first side of the dispersing kettle, and the discharging end of the powder feeding assembly and the first connecting end of the dispersing kettle are located at the first top end of the dispersing kettle; a liquid material feeding assembly is arranged on the second side of the dispersing kettle, the discharging end of the liquid material feeding assembly and the second connecting end of the dispersing kettle are located at the second top end of the dispersing kettle, and the feeding end of the powder material feeding assembly is connected with a drying assembly. The problems that dehydration time is long, the speed of feeding liquid materials is low, energy consumption of vacuum powder feeding at the bottom of the kettle is high, and liquid flows back are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of waterproof coating production equipment, in particular to a polyurethane waterproof coating production device. BACKGROUND

[0002] The production of traditional single-component polyurethane waterproof coating adopts a two-step method of dehydration + polymerization reaction. In the dehydration process, the main purpose is to remove the moisture in the powder filler to prevent the moisture from reacting with isocyanate and pre-polymer to thicken. In actual operation, the powder filler is sucked into the liquid material in the reaction kettle by negative pressure, and then dehydration is carried out under high vacuum. The feeding and dehydration process takes a long time (about 10 hours). After the dehydration dispersion is qualified, the mixture is introduced into the reaction kettle and polymerized with isocyanate.

[0003] The working temperature range of different catalysts and additives is different, and the reaction process needs to be raised and lowered several times. Since the powder filler does not participate in the reaction, it causes energy waste in the process of raising and lowering the temperature of the liquid material.

[0004] For the above-mentioned related technology, the inventor believes that in the traditional process, the powder filler is added by the method of vacuum suction from the bottom of the kettle. This method has the problems of high energy consumption, easy agglomeration of powder, long dispersion time, etc. CONTENT OF THE UTILITY MODEL

[0005] In order to solve the problems of long dehydration time, slow feeding speed into the liquid material, high energy consumption of powder feeding at the bottom of the kettle, and liquid backflow, the application provides a polyurethane waterproof coating production device.

[0006] The polyurethane waterproof coating production device provided by the application adopts the following technical scheme:

[0007] A polyurethane waterproof coating production device, characterized in that: it comprises a dispersion kettle, a powder feeding assembly is arranged on the first side of the dispersion kettle, the discharge end of the powder feeding assembly and the first connecting end of the dispersion kettle are located at the first top end of the dispersion kettle, a liquid feeding assembly is arranged on the second side of the dispersion kettle, the discharge end of the liquid feeding assembly and the second connecting end of the dispersion kettle are located at the second top end of the dispersion kettle, and the feeding end of the powder feeding assembly is connected with a drying assembly.

[0008] By adopting the above technical scheme, the powder is dried by the drying assembly, the influence of water in the powder on the polymerization reaction is reduced, the powder and the liquid are added separately into the interior of the dispersion kettle, the powder enters the interior of the dispersion kettle through the powder feeding assembly, and the liquid enters the interior of the dispersion kettle through the liquid feeding assembly, thereby solving the problems of long dehydration time, slow feeding speed into the liquid material, high energy consumption of powder feeding at the bottom of the kettle, and liquid backflow.

[0009] Optionally, the drying assembly comprises a dryer, and a discharge end of the dryer is connected to the feeding end of the powder feeding assembly.

[0010] By using the above technical scheme, the powder is dried in advance by the dryer, the influence of water seal in the powder on the polymerization reaction is reduced, and the drying before feeding ensures that the water content meets the standard.

[0011] Optionally, the dryer is a vacuum pug-type dryer.

[0012] By using the above technical scheme, the boiling point of water is reduced by setting a vacuum environment, thereby reducing the dehydration temperature of the material and reducing the energy consumption of dehydration.

[0013] Optionally, the powder feeding assembly comprises a homogenizing emulsifying pump, a powder metering tank is arranged at a feeding end of the homogenizing emulsifying pump, a discharge end of the powder metering tank is communicated with a discharge end of the drying assembly, a feeder is arranged at the discharge end of the powder metering tank, and a self-priming pump is arranged between the feeder and the homogenizing emulsifying pump.

[0014] By using the above technical scheme, the pre-metered powder in the powder metering tank is input into the self-priming pump through the feeder, and the powder is transported into the homogenizing emulsifying pump by the self-priming pump for dispersion, thereby further dispersing the powder, improving the dispersion capacity, and reducing the dispersion time.

[0015] Optionally, the homogenizing emulsifying pump is a powder suction type emulsifying pump.

[0016] Optionally, a dispersing disc is rotatably connected in the dispersing kettle, and the dispersing disc disperses the medium in the dispersing kettle.

[0017] By using the above technical scheme, the powder entering the dispersing kettle is dispersed by the dispersing disc arranged in the dispersing kettle, and the powder and the liquid in the dispersing kettle are mixed when the liquid is injected into the dispersing kettle, thereby improving the dispersion effect and speed.

[0018] Optionally, a circulating pipeline is arranged at a bottom end of the dispersing kettle, one end of the circulating pipeline is communicated with the dispersing kettle, and the other end of the circulating pipeline is connected to a feeding end of the self-priming pump.

[0019] By using the above technical scheme, the powder in the dispersing kettle can re-enter the homogenizing emulsifying pump through the circulating pipeline for dispersion, thereby improving the dispersion effect.

[0020] Optionally, the liquid feeding assembly comprises a polymerization kettle, a discharge end of the polymerization kettle is communicated with a feeding end of the dispersing kettle, and a prepolymer is generated in the polymerization kettle.

[0021] By adopting the technical scheme, the polymeric reactor is arranged to pre-arrange the polymerization reaction, the prepolymer is prepared, and the powder filler is added, so that the powder filler does not need to be raised and lowered with the reaction, and energy consumption is reduced.

[0022] Optionally, a first liquid material metering tank is arranged between the dispersion kettle and the polymeric reactor, the first liquid material metering tank controls metering of liquid material entering the inside of the dispersion kettle, and the first liquid material metering tank is in communication with the discharge end of the polymeric reactor.

[0023] Optionally, a second liquid material metering tank is arranged at the feeding end of the polymeric reactor, and the second liquid material metering tank controls metering of liquid material entering the inside of the polymeric reactor.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. The powder filler is dehydrated by a vacuum dryer, which is high in efficiency and low in energy consumption. The problem of moisture is solved, the prepolymer is synthesized first, and then the powder filler is dispersed, which is low in production energy consumption and high in efficiency.

[0026] 2. The powder filler is added by a powder suction type emulsifying pump, which is high in efficiency and low in energy consumption, and the problem of powder agglomeration is solved.

[0027] 3. Under the strong shearing action of the homogenizing pump, the dispersion capacity of the system is improved, the dispersion time is shortened, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of a polyurethane waterproof coating production device in the embodiment of the present application.

[0029] Explanation of reference signs: 1, dispersion kettle; 11, dispersion disc; 2, powder feeding assembly; 21, powder metering tank; 22, self-suction pump; 23, rotary feeder; 24, homogenizing emulsifying pump; 25, circulating pipeline; 3, liquid material feeding assembly; 31, first liquid material metering tank; 32, polymeric reactor; 33, second liquid material metering tank; 4, drying assembly; 41, dryer. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in combination with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be recognized by one skilled in the art that the present application can be practiced without the specific details, or with an alternative combination of mechanisms to achieve the purposes of the present application. Thus, the scope of the present application is not intended to be limited to the particular examples disclosed.

[0032] The production of traditional single-component polyurethane waterproof coating adopts a two-step method of dehydration + polymerization. In the dehydration process, the main purpose is to remove the moisture in the powder filler to prevent the moisture from reacting with isocyanate and pre-polymer to thicken. In actual operation, the powder filler is sucked into the liquid material in the reaction kettle by negative pressure, and then dehydrated by heating and high vacuum. The feeding and dehydration process takes a long time (about 10 hours). The mixed material after passing the dehydration dispersion is introduced into the reaction kettle and polymerized with isocyanate.

[0033] The working temperature range of different catalysts and additives is different, and the reaction process needs to be heated and cooled multiple times. Since the powder filler does not participate in the reaction, it causes energy waste in the heating and cooling process of the liquid material.

[0034] For the related technologies in the above, the inventors believe that in the traditional process, the powder filler is fed by the method of vacuum suction from the bottom of the kettle. This method has the problems of high energy consumption, easy agglomeration of powder, long dispersion time, etc.

[0035] In order to solve the problems of long dehydration time, slow feeding speed into the liquid material, high energy consumption of powder feeding at the bottom of the kettle, and liquid backflow, the present application provides a polyurethane waterproof coating production device.

[0036] The following will be described in detail with reference to the accompanying drawings. Figure 1 The present application will be further described in detail.

[0037] The present application discloses a polyurethane waterproof coating production device. Referring to Figure 1 A polyurethane waterproof coating production device comprises a dispersion kettle 1, a powder feeding assembly 2 is arranged on one side of the dispersion kettle 1, a powder feeding port is fixedly connected to the top wall of the dispersion kettle 1, the powder feeding assembly 2 is connected to the powder feeding port, and the powder enters the inside of the dispersion kettle 1 from the powder feeding port through the powder feeding assembly 2. A liquid feeding assembly 3 is also arranged on one side of the dispersion kettle 1, a liquid feeding port is fixedly connected to the top wall of the dispersion kettle 1, the liquid feeding assembly 3 is connected to the liquid feeding port, and the liquid enters the inside of the dispersion kettle 1 from the liquid feeding port through the liquid feeding assembly 3.

[0038] The feeding end of the powder feeding assembly 2 is further provided with a drying assembly 4, which comprises a drying machine 41. In a specific embodiment, the drying machine 41 is a vacuum pug drying machine, so that the inside of the drying machine 41 is in a vacuum state, thereby reducing the boiling point of the liquid and reducing the dehydration temperature of the material under high vacuum. The boiling point of water is 48.3°C under -0.09 MPa, which is lower than the dehydration temperature of 110°C in the traditional material drying process, thereby reducing energy consumption.

[0039] The powder feeding assembly 2 comprises a powder metering tank 21, the feeding end of which is connected to the discharging end of the drying machine 41, so that the powder is dried in the inside of the drying machine 41 and then enters the inside of the powder metering tank 21, and the powder fed into the dispersion kettle 1 is metered by the powder metering tank 21.

[0040] A self-priming pump 22 is connected to the bottom discharging port of the powder metering tank 21, and a rotary feeder 23 is further arranged between the powder metering tank 21 and the self-priming pump 22. The feeding end of the rotary feeder 23 is fixedly connected to and in communication with the discharging end of the powder metering tank 21, and the discharging end of the rotary feeder 23 is in communication with the feeding end of the self-priming pump 22. The rotary feeder 23 is used to drive the powder discharged from the bottom discharging end of the powder metering tank 21 into the inside of the self-priming pump 22.

[0041] The discharging end of the self-priming pump 22 is further provided with a homogenizing emulsifying pump 24. In a specific embodiment, the homogenizing emulsifying pump 24 can be selected as a powder suction type emulsifying pump, and the discharging end of the homogenizing emulsifying pump 24 is connected to the powder feeding port of the dispersion kettle 1.

[0042] After the powder is dried by vacuum drying and dehydration, it is metered and sent to the front end of the powder suction type emulsifying pump, and then is sucked into the pump group under the action of negative pressure, and is sent into the dispersion kettle 1 after high-speed dispersion and shearing. The influence of water content in the powder on the polymerization reaction is avoided, the powder is completely dried before feeding, and the water content is ensured to meet the standard.

[0043] The bottom end of the dispersion kettle 1 is further fixedly connected with a circulating pipeline 25, one end of which is connected to the bottom end of the dispersion kettle 1, and the other end of which is fixedly connected to and in communication with the feeding end of the self-priming pump 22. The powder in the inside of the dispersion kettle 1 can be kept circulating, thereby promoting the dispersion of the powder.

[0044] The liquid material feeding assembly 3 comprises a first liquid material metering tank 31, the discharging end of which is in communication with the liquid material feeding port of the dispersion kettle 1, so that the first liquid material metering tank 31 meters and sends the liquid material into the inside of the dispersion kettle 1 according to the required amount.

[0045] The first liquid material metering tank 31 is further provided with a polymerization kettle 32, the top end of the polymerization kettle 32 is provided with a second liquid material metering tank 33, the discharge end of the second liquid material metering tank 33 is in communication with the inside of the polymerization kettle 32. The inside of the polymerization kettle 32 is filled with prepolymer, so that the polymerization reaction is pre-positioned, and the powder filler is added after the preparation of the prepolymer, and the powder filler does not need to rise and fall with the reaction, thereby saving energy and reducing consumption.

[0046] The discharge end of the polymerization kettle 32 is in communication with the feed end of the first liquid material metering tank 31, so that the prepolymer in the inside of the polymerization kettle 32 can enter the inside of the first liquid material metering tank 31, and then enter the inside of the reaction kettle for reaction.

[0047] The inside of the reaction kettle is rotatably connected with a dispersion disc 11, and the side wall of the reaction kettle is provided with a driving motor for driving the dispersion disc 11 to rotate at the position relative to the dispersion disc 11, the driving motor drives the dispersion disc 11 to rotate, and then the dispersion disc 11 drives the powder and liquid in the inside of the reaction kettle to mix.

[0048] In the present application, the term "a plurality of" refers to at least two or at least two more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integral connection; "connecting" can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A polyurethane waterproof coating production device characterized by: The application relates to a powder-liquid dispersing device, which comprises a dispersing kettle (1), wherein a powder feeding assembly (2) is arranged on the first side of the dispersing kettle (1), the discharge end of the powder feeding assembly (2) is connected with the first connecting end of the dispersing kettle (1) at the first top end of the dispersing kettle (1), a liquid feeding assembly (3) is arranged on the second side of the dispersing kettle (1), the discharge end of the liquid feeding assembly (3) is connected with the second connecting end of the dispersing kettle (1) at the second top end of the dispersing kettle (1), and the feeding end of the powder feeding assembly (2) is connected with a drying assembly (4).

2. The polyurethane waterproof coating production device according to claim 1, characterized in that: The drying assembly (4) comprises a drying machine (41), and the discharge end of the drying machine (41) is connected with the feeding end of the powder feeding assembly (2) in a reverse mode.

3. The polyurethane waterproof coating production device according to claim 2, characterized in that: The drying machine (41) is a vacuum pug drying machine.

4. The polyurethane waterproof coating production device according to claim 1, characterized in that: The powder feeding assembly (2) comprises a homogenizing emulsifying pump (24), the feeding end of the homogenizing emulsifying pump (24) is provided with a powder metering tank (21), the feeding end of the powder metering tank (21) is communicated with the discharge end of the drying assembly (4), the discharge end of the powder metering tank (21) is provided with a feeder, and a self-priming pump (22) is arranged between the feeder and the homogenizing emulsifying pump (24).

5. The polyurethane waterproof coating production device according to claim 4, characterized in that: The homogenizing emulsifying pump (24) is a powder suction type emulsifying pump.

6. The polyurethane waterproof coating production device according to claim 4, characterized in that: A dispersing disc (11) is rotatably connected in the dispersing kettle (1), and the dispersing disc (11) disperses the medium in the dispersing kettle (1).

7. The polyurethane waterproof coating production device according to claim 6, characterized in that: The bottom end of the dispersing kettle (1) is provided with a circulating pipeline (25), one end of the circulating pipeline (25) is communicated with the dispersing kettle (1), and the other end of the circulating pipeline (25) is connected with the feeding end of the self-priming pump (22).

8. The polyurethane waterproof coating production device according to claim 1, characterized in that: The liquid feeding assembly (3) comprises a polymerization kettle (32), the discharge end of the polymerization kettle (32) is communicated with the feeding end of the dispersing kettle (1), and the polymerization kettle (32) generates a prepolymer in the inside.

9. The polyurethane waterproof coating production device according to claim 8, characterized in that: A first liquid metering tank (31) is arranged between the dispersing kettle (1) and the polymerization kettle (32), the first liquid metering tank (31) controls the metering of liquid material entering the inside of the dispersing kettle (1), and the first liquid metering tank (31) is communicated with the discharge end of the polymerization kettle (32).

10. The polyurethane waterproof coating production device according to claim 9, characterized in that: The feeding end of the polymerization kettle (32) is provided with a second liquid metering tank (33), and the second liquid metering tank (33) controls the metering of liquid material entering the inside of the polymerization kettle (32).

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