Cooling device for polyurethane pouring sealant production
By using a corrugated hollow stirring tube and a cooling jacket design in the stirring device, combined with an electric heating coil to regulate the temperature, the problem of uneven cooling in the production of polyurethane potting compound was solved, achieving temperature uniformity and chemical reaction stability, and improving production quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-04-03
AI Technical Summary
In the existing polyurethane potting compound production process, uneven cooling leads to unstable performance, making it difficult to meet the requirements of high-quality production.
A stirring device with a corrugated hollow stirring tube and a cooling jacket is used. The stirring shaft is driven to rotate by a drive mechanism, which causes cooling water to flow inside the stirring tube. Combined with an electric heating coil to regulate the temperature, uniform cooling and heating are achieved, ensuring the stability of the chemical reaction.
This achieves uniform temperature of the polyurethane potting compound, avoids localized overheating that could affect performance, ensures the stability of the chemical reaction and efficient mixing, and improves production quality.
Smart Images
Figure CN224071896U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polyurethane potting compound technology, and in particular to a cooling device for polyurethane potting compound production. Background Technology
[0002] Polyurethane potting compound is a potting material made from polyurethane as a base material. It is typically prepared by a chemical reaction of raw materials such as polyols and isocyanates, and possesses excellent flexibility, resistance to high and low temperatures, weather resistance, and electrical insulation. Under normal temperature or heating conditions, polyurethane potting compound can flow and fill the gaps and holes in electronic components, circuit boards, and other parts requiring protection, forming a sealant with a certain strength and elasticity after curing. This sealant effectively protects the potted components from moisture, dust, and chemical corrosion, while also providing shock absorption, insulation, and fixation. It is widely used in many fields such as electronics, electrical appliances, automobiles, and aerospace.
[0003] During the production of polyurethane potting compounds, the chemical reaction releases a large amount of heat, causing the material temperature to rise rapidly. Excessively high temperatures can adversely affect the performance of the potting compound, such as accelerating curing, generating bubbles, and affecting the uniformity and stability of the compound.
[0004] Currently, a common cooling method involves installing a cooling jacket on the inner wall of the mixing tank. This method has certain limitations: the polyurethane potting compound near the inner wall of the mixing tank can make full contact with the cooling jacket, resulting in good cooling; however, the potting compound further away from the inner wall, due to its greater distance from the cooling source, has a poorer cooling effect. This uneven cooling further affects the performance of the polyurethane potting compound, making it difficult to meet the demands of high-quality production. Utility Model Content
[0005] This utility model provides a solution that is significantly different from existing technologies to address the problem of uneven cooling effect. In order to overcome the above-mentioned defects of existing technologies, this utility model provides a cooling device for polyurethane potting compound production, which aims to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides a cooling device for polyurethane potting compound production, comprising: a mixing tank, a mixing shaft rotatably mounted inside the mixing tank, a drive mechanism capable of driving the mixing shaft to rotate at the top of the mixing tank, multiple corrugated hollow mixing tubes arranged in a circular array on the outer surface of the mixing shaft, a water inlet groove at the top of the mixing shaft and connected to one end of the corrugated hollow mixing tubes, a water return chamber inside the mixing shaft and connected to the other end of the corrugated hollow mixing tubes, a water return pipe installed inside the water inlet groove and connected to the water return chamber, a water inlet / outlet mechanism at the top of the mixing shaft that allows cooling water to circulate inside the corrugated hollow mixing tubes, a cooling jacket on the inner wall of the mixing tank, a second cooling water inlet pipe connected to one side of the outer surface of the mixing tank, and a second cooling water outlet pipe connected to the other side of the outer surface of the mixing tank.
[0007] Driven by a drive mechanism, the stirring shaft rotates, and with the help of the inlet and outlet water mechanisms, cooling water flows within the corrugated hollow stirring tube. This allows for simultaneous stirring of the polyurethane potting compound within the tube, achieving a cooling effect over a larger area. The cooling capacity is evenly distributed to every corner of the mixing tank, breaking down temperature stratification and ensuring a more uniform temperature of the polyurethane potting compound throughout the tank. This prevents localized overheating from affecting the compound's properties. Furthermore, the stirring process ensures thorough mixing, further promoting uniform heat transfer. Combined with the cooling effect of the cooling jacket, the cooling effect on the material is further enhanced, resulting in high cooling efficiency.
[0008] Preferably, the drive mechanism includes an L-shaped plate mounted on the top of the mixing tank, a drive motor mounted upside down on the top wall of the L-shaped plate, and a pulley set for transmission between the output shaft of the drive motor and the mixing shaft.
[0009] When the drive motor is started, the output shaft of the drive motor can drive the stirring shaft to rotate synchronously under the transmission action of the pulley set, so as to drive the corrugated hollow stirring tube to stir the polyurethane potting compound material.
[0010] Preferably, the water inlet and outlet mechanism includes a first rotary joint installed on the top of the stirring shaft, a first cooling water inlet pipe connected to the outer surface of the first rotary joint, a second rotary joint installed on the top of the return water pipe extending to the upper side of the first rotary joint, and a first cooling water outlet pipe connected to the outer surface of the second rotary joint.
[0011] During the rotation of the stirring shaft, cooling water enters the inlet tank through the first rotating joint from the first cooling water inlet pipe and flows into the corrugated hollow stirring tube. Then, the cooling water enters the return water chamber from the bottom of the corrugated hollow stirring tube, and then enters the return water pipe from the return water chamber. Finally, it is discharged from the first cooling water outlet pipe through the second rotating joint, thereby achieving the purpose of cooling water flowing in the corrugated hollow stirring tube and carrying away the heat of the polyurethane potting compound material for cooling.
[0012] Preferably, the inner wall of the mixing tank is provided with a spiral tube, and an electric heating coil is provided inside the spiral tube.
[0013] To prevent the temperature of the polyurethane potting compound from dropping too low, an electric heating coil is installed on the inner wall of the mixing tank. When the electric heating coil is energized, it can play a heating role. Therefore, through the combined effect of cooling and heating, the temperature of the polyurethane potting compound can be better regulated, ensuring the stability of its chemical reaction.
[0014] Preferably, a temperature sensor is installed on the inner wall of the mixing tank.
[0015] By setting a temperature sensor, the temperature of the polyurethane potting compound material can be detected in real time.
[0016] Preferably, three temperature sensors are provided, which are respectively arranged on the upper, middle and lower sides of the inner wall of the mixing tank.
[0017] Simultaneous temperature detection of the upper, middle, and lower layers allows for accurate determination of the temperature of the polyurethane potting compound material, avoiding detection errors caused by uneven temperature distribution.
[0018] Preferably, a screw conveyor is installed at the bottom of the mixing tank.
[0019] After the polyurethane potting compound has reacted, it can be discharged outward via a screw conveyor.
[0020] Preferably, a bearing is installed at the top of the mixing tank, and the end of the output shaft of the drive motor is installed inside the bearing.
[0021] It provides stable support to the output shaft of the drive motor, making its rotation more stable and smooth.
[0022] The beneficial effects of this utility model are:
[0023] In use, this invention drives the stirring shaft to rotate via a drive mechanism. Under the action of the water inlet and outlet mechanism, cooling water can flow inside the corrugated hollow stirring tube. Therefore, while stirring the polyurethane potting compound in the corrugated hollow stirring tube, a cooling effect can be achieved, allowing the cooling area to cover a larger range. It can evenly distribute the cooling energy to every corner of the mixing tank, breaking the temperature stratification phenomenon and making the temperature of the polyurethane potting compound material in the entire tank more uniform. This avoids local overheating affecting the properties of the colloid. Furthermore, stirring can ensure that the material is fully mixed, which can further promote the uniform transfer of heat in the material.
[0024] In use, this invention can not only cool down the material through the corrugated hollow stirring tube and cooling jacket, but also heat it using an electric heating coil. Through the combined effect of cooling and heating, the temperature of the polyurethane potting compound can be better regulated, ensuring the stability of its chemical reaction. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;
[0027] Figure 2 This is a cross-sectional structural diagram of the mixing tank in this utility model;
[0028] Figure 3 yes Figure 2 Enlarged diagram of A in the middle;
[0029] Figure 4 This is a schematic diagram of the drive mechanism in this utility model;
[0030] Figure 5 This is a cross-sectional structural diagram of the stirring shaft and the corrugated hollow stirring tube in this utility model;
[0031] Figure 6 yes Figure 5 Enlarged diagram of B in the diagram.
[0032] Part Name
[0033] 100. Mixing tank; 101. Mixing shaft; 102. Water inlet tank; 103. Corrugated hollow mixing tube; 104. Water return chamber; 105. Water return pipe; 200. Drive mechanism; 201. L-shaped plate; 202. Drive motor; 203. Pulley assembly; 300. Water inlet / outlet mechanism; 301. First rotary joint; 302. First cooling water inlet pipe; 303. Second rotary joint; 304. First cooling water outlet pipe; 400. Cooling jacket; 401. Second cooling water inlet pipe; 402. Second cooling water outlet pipe; 500. Spiral tube; 501. Electric heating coil; 600. Temperature sensor; 700. Screw conveyor. Detailed Implementation
[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings. Preferably, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0035] In the description of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, in the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0036] Please see Figures 1 to 6This utility model provides a cooling device for polyurethane potting compound production, comprising: a mixing tank 100, a mixing shaft 101 rotatably mounted inside the mixing tank 100, a driving mechanism 200 for driving the mixing shaft 101 to rotate at the top of the mixing tank 100, multiple corrugated hollow mixing tubes 103 arranged in a ring array on the outer surface of the mixing shaft 101, a water inlet groove 102 opened at the top of the mixing shaft 101 and connected to one end of the corrugated hollow mixing tubes 103, and a water return chamber 104 opened inside the mixing shaft 101. The other end of the corrugated hollow stirring tube 103 is connected to the return water chamber 104. A return water pipe 105 is installed inside the water inlet tank 102, and the return water pipe 105 is connected to the return water chamber 104. A water inlet / outlet mechanism 300 is provided at the top of the stirring shaft 101, which allows cooling water to circulate inside the corrugated hollow stirring tube 103. A cooling jacket 400 is provided on the inner wall of the stirring tank 100. A second cooling water inlet pipe 401 is connected to one side of the outer surface of the stirring tank 100, and a second cooling water outlet pipe 402 is connected to the other side of the outer surface of the stirring tank 100. Structure 200 includes an L-shaped plate 201 mounted on top of the mixing tank 100. A drive motor 202 is mounted upside down on the top wall of the L-shaped plate 201. A pulley assembly 203 is provided between the output shaft of the drive motor 202 and the mixing shaft 101 for transmission. The water inlet / outlet mechanism 300 includes a first rotary joint 301 mounted on top of the mixing shaft 101. A first cooling water inlet pipe 302 is connected to the outer surface of the first rotary joint 301. The top of the return water pipe 105 extends through to the upper side of the first rotary joint 301 and a second rotary joint 303 is mounted thereon. The outer surface is connected to a first cooling water outlet pipe 304. The inner wall of the mixing tank 100 is provided with a spiral tube 500. An electric heating coil 501 is provided inside the spiral tube 500. A temperature sensor 600 is provided on the inner wall of the mixing tank 100. There are three temperature sensors 600, which are respectively arranged on the upper, middle and lower sides of the inner wall of the mixing tank 100. A screw conveyor 700 is installed at the bottom of the mixing tank 100. A bearing is installed at the top of the mixing tank 100. The end of the output shaft of the drive motor 202 is installed in the bearing.
[0037] In this embodiment:
[0038] First, a feeding port is provided on the top of the mixing tank 100, and a sealing cap is provided on the feeding port. The polyurethane potting compound material is added into the mixing tank 100 through the feeding port to carry out a chemical reaction. The drive motor 202 is started, and under the transmission action of the pulley group 203, the stirring shaft 101 is driven to rotate to stir the material and make its chemical reaction more uniform.
[0039] Secondly, since the chemical reaction releases a large amount of heat, when the temperature sensor 600 detects that the temperature is too high, the cooling water switch (not shown in the figure) can be turned on, allowing cooling water to enter the first cooling water inlet pipe 302 and the second cooling water inlet pipe 401 respectively. The cooling water enters the water inlet tank 102 from the first cooling water inlet pipe 302 through the first rotary joint 301, and then flows into the corrugated hollow stirring tube 103. Subsequently, the cooling water enters the return water chamber 104 from the bottom of the corrugated hollow stirring tube 103. The water then enters the return water pipe 105 through the return water chamber 104, and finally exits from the first cooling water outlet pipe 304 through the second rotary joint 303. This achieves the purpose of cooling water flowing in the corrugated hollow stirring tube 103, and carries away the heat of the polyurethane potting compound material for cooling. The cooling water enters the cooling jacket 400 from the second cooling water inlet pipe 401 and then exits from the second cooling water outlet pipe 402, which can further improve the cooling effect on the material. Under the stirring of the corrugated hollow stirring tube 103, the temperature becomes more uniform.
[0040] Then, in order to prevent the temperature of the polyurethane potting compound material from dropping too low, an electric heating coil 501 is installed on the inner wall of the mixing tank 100. When the electric heating coil 501 is energized, it can play a heating role. Therefore, through the combined effect of cooling and heating, the temperature of the polyurethane potting compound material can be better regulated, ensuring the stability of its chemical reaction.
[0041] Finally, the materials that have completed the chemical reaction are discharged outward via screw conveyor 700.
[0042] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.
Claims
1. A cooling device for polyurethane pouring sealant production, comprising: The utility model provides an agitator (100), its characterized in be that the agitator (100) is installed with the stirring shaft (101) through and rotates in the inside, the top of agitator (100) is provided with the drive mechanism (200) that can drive the stirring shaft (101) rotation, the outer surface of stirring shaft (101) is installed with multiple wave hollow stirring pipe (103) in annular array, the top of stirring shaft (101) is provided with the water inlet groove (102), and the water inlet groove (102) is communicated with one end of wave hollow stirring pipe (103), the inside of stirring shaft (101) is provided with the backwater cavity (104), and the other end of wave hollow stirring pipe (103) is communicated with backwater cavity (104), the inside of water inlet groove (102) is installed with backwater pipe (105), and backwater pipe (105) is communicated with backwater cavity (104), the top of stirring shaft (101) is provided with the water inlet and outlet mechanism (300), the water inlet and outlet mechanism (300) can make cooling water flow in the inside of wave hollow stirring pipe (103), the inner wall of agitator (100) is provided with cooling sandwich (400), one side of the outer surface of agitator (100) is connected with second cooling water inlet pipe (401), and the other side of the outer surface of agitator (100) is connected with second cooling water outlet pipe (402).
2. The cooling device for polyurethane pouring sealant production of claim 1, wherein, The drive mechanism (200) includes the L-shaped plate (201) installed at the top of the agitator (100), the top wall of the L-shaped plate (201) is installed with a drive motor (202) in an inverted manner, and a belt pulley set (203) is arranged in transmission between the output shaft of the drive motor (202) and the stirring shaft (101).
3. The cooling device for polyurethane pouring sealant production of claim 1, wherein, The water inlet and outlet mechanism (300) includes a first rotary joint (301) installed at the top of the stirring shaft (101), the outer surface of the first rotary joint (301) is connected with a first cooling water inlet pipe (302), the top of the backwater pipe (105) penetrates to the upper side of the first rotary joint (301) and is installed with a second rotary joint (303), and the outer surface of the second rotary joint (303) is connected with a first cooling water outlet pipe (304).
4. The cooling device for polyurethane pouring sealant production of claim 1, wherein, The inner wall of the agitator (100) is provided with a spiral pipe (500), and the inside of the spiral pipe (500) is provided with an electric heating coil (501).
5. The cooling device for polyurethane pouring sealant production of claim 1, wherein, The inner wall of the agitator (100) is provided with a temperature sensor (600). 6.The cooling device for polyurethane pouring sealant production of claim 5, characterized in that, The number of temperature sensors (600) is three, and the three temperature sensors (600) are arranged at the upper side, middle side and lower side of the inner wall of the agitator (100), respectively.
7. The cooling device for polyurethane pouring sealant production of claim 1, wherein, The bottom of the agitator (100) is installed with a screw conveyor (700). 8.The cooling device for polyurethane pouring sealant production of claim 2, characterized in that, The top of the agitator (100) is installed with a bearing, and the end of the output shaft of the drive motor (202) is installed in the bearing.