Multifunctional liquid polyurethane reaction kettle
The multifunctional liquid polyurethane reactor integrates mixing and heating in a single container, addressing space and pipeline issues, ensuring consistent product quality and efficient production by using a multi-layer structure and stirring system.
Patent Information
- Application Number
- CN202420673978.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-03
AI Technical Summary
Existing polyurethane production processes require separate mixing and temperature control tanks, leading to increased costs, space requirements, and issues with pipeline blockage and inaccurate addition of catalysts due to high viscosity, affecting product quality.
A multifunctional liquid polyurethane reactor integrating mixing and heating functions in a single container, utilizing a multi-layer structure with a stirring system, heating system, and temperature control unit to facilitate uniform mixing and heating without transfer, and a plum blossom-shaped stirring bar for efficient mixing.
Reduces equipment costs and space, prevents pipeline blockage, ensures consistent product quality by maintaining constant capacity and concentration, and allows accurate addition of catalysts, enhancing the production efficiency and quality of liquid polyurethane.
Smart Images
Figure CN222240244U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid polyurethane resin production, in particular to a multifunctional liquid polyurethane reaction kettle. Background Art
[0002] Polyurethane is a type of polymer made by the reaction of isocyanate (or polyol) with various amines, polyols, etc. Among them, liquid polyurethane has high viscosity and is mainly used in insulation, waterproofing, bonding, caulking and other application fields.
[0003] Liquid polyurethane usually refers to polyurethane prepared by the reaction of two monomers (referred to as liquid polyurethane). During the preparation process, isocyanate and polyol are mixed in a certain proportion. The production process of liquid polyurethane is as follows: ① Mix isocyanate and polyol in a certain proportion and stir evenly; ② Add catalysts and additives to the mixture, and use the heating system to heat the mixture for a period of time; ③ Turn off the heating system and continue stirring until the mixture cools to room temperature; ④ Continue to add a certain amount of solvent to the mixture and continue stirring; ⑤ Filter the mixture to remove impurities and insoluble substances; ⑥ Color and fragrance the mixture. As for the current production status of the factory, step ① is performed in a stirring tank, while steps ②, ③ and ④ are performed in a temperature control tank. After step ① is completed, the mixture needs to be transported to the temperature control tank as a whole with the help of a liquid pump. This means that the liquid polyurethane production line needs to be equipped with a mixing tank and a temperature control tank at the same time. On the one hand, the tank purchase cost is increased, and the floor space is large, which is not conducive to workshop planning and layout; on the other hand, in the process of pumping the mixed liquid from the mixing tank to the temperature control tank, a lot of electricity is consumed. More importantly, if the production line is suspended for a long time, due to the extremely high viscosity of the mixed liquid, the pumping pipe is very likely to have a narrow diameter or blockage, and a lot of manpower and material resources will be required to flush it or even replace it later; on the other hand, because the mixed liquid undergoes changes in the container, and it is difficult to accurately verify its capacity, it is very easy to make it difficult to accurately control the amount of catalyst, additives, and solvents added in the future, which will inevitably affect the quality of the finished liquid polyurethane product. Therefore, it is urgent for technicians to solve the above problems. Summary of the invention
[0004] Therefore, in view of the above existing problems and defects, the project team of the utility model collected relevant information, conducted multiple evaluations and considerations, and the project team members continuously experimented and modified, which eventually led to the emergence of the multifunctional liquid polyurethane reactor.
[0005] In order to solve the above technical problems, the utility model relates to a multifunctional liquid polyurethane reactor for preparing polyurethane, which comprises a reactor body, a first feeding pipe, a second feeding pipe, a third feeding pipe, a stirring system and a heating system. Among them, a mixing chamber for receiving an isocyanate solution delivered through the first feeding pipe, a polyol solution delivered through the second feeding pipe and a catalyst or an auxiliary agent fed through the third feeding pipe is provided in the reactor body. The stirring system is used to disturb the mixing chamber, which is carried by the reactor body. The heating system is matched with the stirring system, and heat is input into the mixing chamber during the stirring process.
[0006] As a further improvement of the technical solution of the utility model, the heat tracing system includes a medium input pipe, a medium output pipe and an electric heating element. From the inside to the outside, the kettle body is sequentially arranged with a mutually isolated and independent mixing chamber, a medium chamber, and an insulation chamber. The medium input pipe and the medium output pipe are used to input and output high specific heat capacity medium, and are both connected to the medium chamber. The electric heating element is used to heat up the high specific heat capacity medium, and it is matched with the medium chamber.
[0007] As a further improvement of the technical solution of the utility model, the kettle body is a multi-layer structure, which is sequentially composed of an inner shell, an intermediate shell and an external shell. The mixing chamber is surrounded by the inner shell. The intermediate shell surrounds the lower half of the inner shell, and the medium chamber is formed incidentally. The external shell fully surrounds the inner shell and the intermediate shell, and the insulation chamber is formed incidentally.
[0008] As a further improvement of the technical solution of the utility model, the insulation cavity is filled with insulation material, or it is vacuumed.
[0009] As a further improvement of the technical solution of the utility model, the heat tracing system also includes a temperature control unit. The temperature control unit includes a temperature sensor and a controller. The temperature sensor is used to monitor the temperature value of the mixed liquid in the mixing chamber, and is placed in the mixing chamber. The controller is electrically connected to the temperature sensor and the electric heating element at the same time, and is used to receive the temperature parameters fed back by the temperature sensor, and after data processing and analysis, it immediately sends a control signal to the electric heating element.
[0010] As a further improvement of the technical solution of the utility model, the stirring system includes a reduction motor, a transmission shaft, an upper stirring piece and a lower stirring piece. The reduction motor is installed on the top wall of the kettle body. The transmission shaft is driven by the reduction motor and vertically inserted into the mixing chamber. The upper stirring piece and the lower stirring piece are sequentially mounted on the transmission shaft. Assuming that the total height value of the mixing chamber is a, the distance between the upper stirring piece and the lowest point of the mixing chamber is b, and the distance between the lower stirring piece and the lowest point of the mixing chamber is c, then 2 / 5a≤b≤2 / 3a, c≤30cm.
[0011] As a further improvement of the technical solution of the utility model, the stirring system also includes a plum blossom-shaped stirring bar. The plum blossom-shaped stirring bar is sleeved on the tail end of the transmission shaft and corresponds to the liquid outlet of the mixing chamber.
[0012] As a further improvement of the technical solution of the utility model, the lower stirring member is composed of a mounting sleeve, a first stirring wing and a second stirring wing. The mounting sleeve is detachably mounted on the transmission shaft by means of a fastener. The first stirring wing and the second stirring wing are symmetrically fixed on both sides of the mounting sleeve. Near the mounting sleeve area, the first stirring wing and the second stirring wing are respectively provided with a first avoidance notch and a second avoidance notch for avoiding the plum blossom-shaped stirring rod.
[0013] As a further improvement of the technical solution of the utility model, the bottom wall of the mixing chamber is in a "funnel shape". The first stirring wing and the second stirring wing are both installed in an inclined state, and the two pass over the bottom wall of the mixing chamber at an equal interval, and the interval value is set to d.
[0014] As a further improvement of the technical solution of the utility model, a plurality of first turbulent flow holes and a plurality of second turbulent flow holes are evenly distributed on the first stirring wing and the second stirring wing respectively.
[0015] In view of the fact that the multifunctional liquid polyurethane reactor has both liquid stirring function and heating function, the initial liquid polyurethane material does not need to be transferred by pumping, and can be stirred and mixed, and heated to accelerate the reaction process in the same container in sequence. Therefore, in the factory production stage, the multifunctional liquid polyurethane reactor disclosed by the utility model can at least achieve the following beneficial technical effects, specifically:
[0016] 1) The equipment required for the liquid polyurethane production line has been greatly reduced (the mixing tank and the temperature control tank are organically integrated, and the pumping equipment is correspondingly omitted), which not only effectively reduces the equipment purchase cost, but also reduces the floor space, which is conducive to the subsequent workshop planning and layout;
[0017] 2) In the process of stirring and heating the liquid polyurethane initial state to accelerate the reaction, there is no need to transfer the process by pumping, thus fundamentally eliminating the narrowing or blockage of the pumping pipeline caused by long-term line stoppage, high viscosity of the liquid polyurethane initial state, etc.;
[0018] 3) Due to the consistent storage environment, the capacity and concentration of the initial liquid polyurethane are kept constant, which is conducive to the subsequent more accurate addition of catalysts, additives, and solvents, and thus the liquid polyurethane resin preparation process can be accurately implemented, laying a good foundation for improving the quality of liquid polyurethane finished products. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is a three-dimensional schematic diagram of the multifunctional liquid polyurethane reaction kettle disclosed in the utility model.
[0021] Figure 2 yes Figure 1 Top view of the .
[0022] Figure 3 yes Figure 2 AA section view.
[0023] Figure 4 The utility model discloses a three-dimensional schematic diagram of a stirring system in a multifunctional liquid polyurethane reaction kettle.
[0024] Figure 5 The utility model discloses a stereoscopic schematic diagram of a stirring member disposed below in a multifunctional liquid polyurethane reaction kettle.
[0025] Figure 6 The utility model discloses a schematic diagram of the relative position relationship between a stirring system and a bottom wall of a mixing chamber in a multifunctional liquid polyurethane reaction kettle.
[0026] Figure 7 yes Figure 6 Front view of .
[0027] Figure 8 It is a three-dimensional schematic diagram of the heating system in the multifunctional liquid polyurethane reactor disclosed in the utility model (it can also be expressed as a three-dimensional schematic diagram with hidden lines visible from another viewing angle).
[0028] 1-kettle body; 11-mixing chamber; 12-medium chamber; 13-insulating chamber; 2-first feeding pipe; 3-second feeding pipe; 4-third feeding pipe; 5-stirring system; 51-reduction motor; 52-drive shaft; 53-upper stirring element; 54-lower stirring element; 541-installation sleeve; 542-first stirring wing; 5421-first avoidance gap; 5422-first turbulent flow hole; 543-second stirring wing; 5431-second avoidance gap; 5432-second turbulent flow hole; 55-plum blossom-shaped stirring bar; 6-heating system; 61-medium input pipe; 62-medium output pipe; 63-electric heating element. DETAILED DESCRIPTION
[0029] In the description of the present invention, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0030] The following is a further detailed description of the contents disclosed in the present utility model in conjunction with specific embodiments. Figure 1 The three-dimensional schematic diagram of the multifunctional liquid polyurethane reactor disclosed in the utility model is shown, and it can be seen that it is mainly composed of a reactor body 1, a first feeding pipe 2, a second feeding pipe 3, a third feeding pipe 4, a stirring system 5 and a heating system 6. Figure 2 , 3 In the above, the kettle body 1 is a multi-layer structure, which is composed of an inner shell, an intermediate shell and an external shell in sequence. A mixing chamber 11 is formed inside the inner shell to receive the isocyanate solution delivered through the first feeding pipe 2, the polyol solution delivered through the second feeding pipe 3 and the catalyst or auxiliary agent fed through the third feeding pipe 4. The intermediate shell surrounds the lower half of the inner shell, and a medium chamber 12 for accommodating a high specific heat capacity medium is formed. The external shell fully surrounds the inner shell and the intermediate shell, and an insulating chamber 13 is formed. The stirring system 5 is used to disturb the mixing chamber 11, which is carried by the kettle body 1. As shown Figure 4 As shown in , the stirring system 5 includes a reduction motor 51, a transmission shaft 52, an upper stirring member 53 and a lower stirring member 54. The reduction motor 51 is installed on the top wall of the kettle body 1. The transmission shaft 52 is driven by the reduction motor 51 and vertically inserted into the mixing chamber 11. The upper stirring member 53 and the lower stirring member 54 are sequentially mounted on the transmission shaft. The heating system 6 is matched with the stirring system 5, and continuously inputs heat into the mixing chamber 11 during the stirring process. Figure 8 As shown in the figure, the heat tracing system 6 is mainly composed of a medium input pipe 61, a medium output pipe 62 and an electric heating element 63. The medium input pipe 61 and the medium output pipe 62 are used to input and output the high specific heat capacity medium to the medium chamber 12. The electric heating element 63 is used to heat the high specific heat capacity medium to indirectly heat the isocyanate and polyol mixed liquid contained in the mixing chamber, and is matched with the medium chamber 12.
[0031] The working principle of the multifunctional liquid polyurethane reactor is as follows: first, isocyanate solution and polyol solution are respectively input into the mixing chamber through the first feeding pipe 2 and the second feeding pipe 3, and then, the stirring system 5 is started to continuously disturb the mixing chamber until the isocyanate solution and the polyol solution are evenly mixed. Subsequently, the heating system 6 is started to continuously transfer heat to the mixing chamber, and the isocyanate and polyol mixture is heated. At the same time, workers sequentially feed catalysts and additives into the mixing chamber through the third feeding pipe 4, and the polymerization reaction is accelerated. Finally, the heating system 6 is turned off and stirring is continued until the generated polymer is cooled to room temperature; the preliminary preparation process is completed.
[0032] The multifunctional liquid polyurethane reactor has both liquid stirring and heating functions. In the early preparation process, the initial liquid polyurethane material does not need to be pumped and transferred, and stirring, mixing, and heating to accelerate the reaction process can be completed in the same container in sequence. Therefore, in the factory production stage, the multifunctional liquid polyurethane reactor disclosed by the utility model can at least achieve the following beneficial technical effects, specifically:
[0033] 1) The equipment required for the liquid polyurethane production line has been greatly reduced (the mixing tank and the temperature control tank are organically integrated, and the pumping equipment is correspondingly omitted), which not only effectively reduces the equipment purchase cost, but also reduces the floor space, which is conducive to the subsequent workshop planning and layout;
[0034] 2) In the process of stirring and heating the liquid polyurethane initial product (i.e., the isocyanate and polyol mixture) to accelerate the reaction, there is no need to pump it in transit, thus fundamentally eliminating the narrowing or blockage of the pumping pipeline caused by long-term line stoppage and high viscosity of the liquid polyurethane initial product;
[0035] It is also important to point out here that, due to the consistent storage environment, the capacity and concentration of the initial liquid polyurethane product remain constant, which is conducive to the subsequent more accurate addition of catalysts, additives, and solvents, and thus the liquid polyurethane resin preparation process route can be accurately implemented, laying a good foundation for improving the quality of liquid polyurethane finished products.
[0036] According to long-term industry production experience, whether the real-time temperature in the mixing chamber 11 meets the process requirements has a significant impact on the smooth progress of the polymerization reaction. In view of this, in order to more accurately control the real-time temperature in the mixing chamber 11, as a further optimization of the above technical solution, the heating system 6 is also equipped with a temperature control unit (not shown in the figure). The temperature control unit includes a temperature sensor and a controller. The temperature sensor is used to monitor the temperature value of the mixed liquid in the mixing chamber 11, and it is placed in the mixing chamber 11. The controller is electrically connected to the temperature sensor and the electric heating element 63 at the same time, and is used to receive the temperature parameters fed back by the temperature sensor. After data processing and analysis, the control signal is immediately sent to the electric heating element 63.
[0037] The only purpose of setting up the insulating chamber 13 is to prevent a large amount of heat from being conducted or radiated from the kettle body 1 to the outside, thereby ensuring that the mixing chamber 1 has a good temperature rise rate and a relatively small temperature gradient. In view of this, in actual implementation, it is preferred to vacuum the insulating chamber 13. In this way, it not only ensures that it has good thermal insulation performance, but also has less implementation difficulty and low manufacturing cost.
[0038] Of course, as another modified design of the above technical solution, the insulation cavity 13 may also be filled with insulation materials, such as glass fiber, asbestos, rock wool and silicate, etc. A good insulation effect can also be achieved, but the implementation cost is relatively high and the deadweight of the reactor increases.
[0039] It should also be noted that, in conjunction with the attached Figure 3 , 4 Under the synergistic effect of the upper stirring member 53 and the lower stirring member 54, the liquid polyurethane initial state is stirred in layers, so that more vortices can be formed at the same rotation speed, and turbulence is more easily formed, thereby improving the stirring efficiency and achieving a higher mixing uniformity. In addition, during the stirring process, the upper stirring member 53 and the lower stirring member 54 influence and act on each other, effectively increasing the degree of agitation of the liquid polyurethane initial state in each area of the mixing chamber 11, and effectively avoiding the occurrence of stirring dead corners.
[0040] In order to further optimize the stirring effect, the present invention also limits the position height of the upper stirring member 53 and the lower stirring member 54 to a certain extent. Figure 2 , 3 As shown in , assuming that the total height of the mixing chamber 11 is a, the distance between the upper stirring member 53 and the lowest point of the mixing chamber 11 is b, and the distance between the lower stirring member 54 and the lowest point of the mixing chamber 11 is c, then 2 / 5a≤b≤2 / 3a, c≤30cm.
[0041] It is known that according to common knowledge, the initial liquid polyurethane after the initial polymerization reaction has extremely strong viscosity, which is easy to cause poor discharge or blockage. In view of this, as a further optimization of the above technical solution, Figure 3 , 4 As shown in the figure, the stirring system 6 also includes a plum blossom-shaped stirring bar 55. The plum blossom-shaped stirring bar 55 is mounted on the tail end of the transmission shaft 52 and corresponds to the liquid outlet of the mixing chamber 11. Compared with the traditional blade-type stirring element, the plum blossom-shaped stirring bar 55 not only enhances the degree of turbulence in the axial and radial directions, has a good mixing effect, and significantly saves energy, but also effectively increases the axial kinetic energy of the liquid polyurethane primary material near the discharge port, which is beneficial to improving the directional discharge efficiency, thereby paving a good foundation for the smooth and efficient discharge of the liquid polyurethane primary material.
[0042] like Figure 5 As shown in the figure, as a further refinement of the structure of the lower stirring member 54, it is composed of a mounting sleeve 541, a first stirring wing 542 and a second stirring wing 543. The mounting sleeve 541 is detachably mounted on the transmission shaft 52 by means of fasteners. The first stirring wing 542 and the second stirring wing 543 are symmetrically fixed on both sides of the mounting sleeve 541. In this way, while ensuring that the lower stirring member 54 has an excellent disturbance effect, the repairability and convenience of the lower stirring member 54 are greatly improved.
[0043] Furthermore, by Figure 5 It can also be clearly seen that a plurality of first turbulent flow holes 5422 and second turbulent flow holes 5432 are evenly distributed on the first stirring wing 542 and the second stirring wing 543, respectively. The first turbulent flow holes 5422 and the second turbulent flow holes 5432 can effectively increase the contact area between the isocyanate solution and the polyol solution, which is conducive to promoting a more thorough mixing of the liquid polyurethane initial state. Furthermore, the shape and size of the first turbulent flow holes 5422 and the second turbulent flow holes 5432 also greatly affect the stirring and mixing effect. For example, the circular, square, and elliptical shapes will affect the liquid flow dynamic characteristics of the liquid polyurethane initial state in the actual stirring process, and thus will inevitably produce different stirring effects. In actual implementation, specific selection can be made according to the parameters of the preparation process file.
[0044] In addition, in order to reasonably avoid the plum blossom-shaped stirring bar 55 , a first avoidance notch 5421 and a second avoidance notch 5431 are respectively provided on the first stirring wing 542 and the second stirring wing 543 near the mounting sleeve 541 .
[0045] Finally, it should be noted that due to the high viscosity of the initial liquid polyurethane after the initial polymerization reaction, it is very easy to adhere to the side wall of the mixing chamber 11 (especially the bottom wall), which is difficult to clean. As time accumulates, it is bound to affect the smooth implementation of the stirring action of the plum blossom-shaped stirring bar 55, and it is very easy to block the discharge port. In view of this, as a further optimization of the above technical solution, as follows Figure 6 , 7 As shown in , the bottom wall of the mixing chamber 11 is optimized to be "funnel-shaped", thereby effectively increasing the downward potential energy of the liquid polyurethane initial state, and facilitating timely discharge through the discharge port. The first stirring wing 542 and the second stirring wing 543 are both installed in an inclined state, and the two sweep across the bottom wall of the mixing chamber 11 at equal intervals, and the spacing value is set to d. In this way, during the stirring process, the first stirring wing 542 and the second stirring wing 543 can sweep the bottom wall of the mixing chamber 11 in real time, thereby effectively avoiding the occurrence of serious thickening of the liquid polyurethane initial state on the bottom wall of the mixing chamber 11 due to long-term accumulation.
[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A multifunctional liquid polyurethane reactor for preparing polyurethane, characterized in that: The invention comprises a kettle body, a first feeding pipe, a second feeding pipe, a third feeding pipe, a stirring system and a heating system; wherein the kettle body is provided with a mixing chamber for receiving an isocyanate solution delivered via the first feeding pipe, a polyol solution delivered via the second feeding pipe and a catalyst or an auxiliary agent fed via the third feeding pipe; the stirring system is used to disturb the mixing chamber and is carried by the kettle body; the heating system is matched with the stirring system and inputs heat into the mixing chamber during the stirring process; The heating system includes a medium input pipe, a medium output pipe and an electric heating element; along the direction from the inside to the outside, the kettle body is sequentially arranged with the mixing chamber, the medium chamber and the insulation chamber which are isolated and independent from each other; the medium input pipe and the medium output pipe are used to input and output the high specific heat capacity medium, and are both connected to the medium chamber; the electric heating element is used to heat the high specific heat capacity medium, and it is matched with the medium chamber.
2. The multifunctional liquid polyurethane reactor according to claim 1, characterized in that: The kettle body is a multi-layer structure, which is composed of an inner shell, an intermediate shell and an external shell in sequence; the mixing chamber is surrounded by the inner shell; the intermediate shell surrounds the lower half of the inner shell, and the medium chamber is formed incidentally; the external shell fully surrounds the inner shell and the intermediate shell, and the insulation chamber is formed incidentally.
3. The multifunctional liquid polyurethane reactor according to claim 2, characterized in that: The insulation cavity is filled with insulation material, or it is evacuated.
4. The multifunctional liquid polyurethane reactor according to claim 1, characterized in that: The heating system also includes a temperature control unit; the temperature control unit includes a temperature sensor and a controller; the temperature sensor is used to monitor the temperature value of the mixed liquid in the mixing chamber, and is placed in the mixing chamber; the controller is electrically connected to the temperature sensor and the electric heating element at the same time, and is used to receive the temperature parameters fed back by the temperature sensor, and after data processing and analysis, immediately send a control signal to the electric heating element.
5. The multifunctional liquid polyurethane reactor according to any one of claims 1 to 4, characterized in that: The stirring system comprises a reduction motor, a transmission shaft, an upper stirring member and a lower stirring member; the reduction motor is installed on the top wall of the kettle body; the transmission shaft is driven by the reduction motor and vertically inserted into the mixing chamber; The upper stirring member and the lower stirring member are sequentially mounted on the transmission shaft; Assuming that the total height of the mixing chamber is a, the distance between the upper stirring element and the lowest point of the mixing chamber is b, and the distance between the lower stirring element and the lowest point of the mixing chamber is c, then 2 / 5a≤b≤2 / 3a, c≤30cm.
6. The multifunctional liquid polyurethane reactor according to claim 5, characterized in that: The stirring system also includes a plum blossom-shaped stirring bar; the plum blossom-shaped stirring bar is sleeved on the tail end of the transmission shaft and corresponds to the liquid outlet of the mixing chamber.
7. The multifunctional liquid polyurethane reactor according to claim 6, characterized in that: The lower stirring member is composed of a mounting sleeve, a first stirring wing and a second stirring wing; the mounting sleeve is detachably mounted on the transmission shaft by means of a fastener; the first stirring wing and the second stirring wing are symmetrically fixed on both sides of the mounting sleeve; Adjacent to the mounting sleeve area, the first stirring wing and the second stirring wing are respectively provided with a first avoidance gap and a second avoidance gap for avoiding the plum blossom-shaped stirring bar.
8. The multifunctional liquid polyurethane reactor according to claim 7, characterized in that: The bottom wall of the mixing chamber is in a "funnel shape"; the first stirring wing and the second stirring wing are both installed in an inclined state, and the two pass over the bottom wall of the mixing chamber at equal intervals, and the interval value is set to d.
9. The multifunctional liquid polyurethane reactor according to claim 7, characterized in that: A plurality of first flow disturbance holes and a plurality of second flow disturbance holes are evenly distributed on the first stirring wing and the second stirring wing, respectively.