Dynamic mixing device for polyurethane synthesis production

Abstract

The invention discloses a dynamic mixing device for polyurethane synthesis production, the dynamic mixing device comprises a synthesis reaction device and a mixing stirring device, the mixing stirring device is fixedly installed on the synthesis reaction device, the synthesis reaction device comprises a mixing reaction kettle, the bottom end of the mixing reaction kettle is in a spherical design, and the mixing reaction kettle is arranged on the mixing reaction kettle. The device comprises a mixing reaction kettle, the outer side of the mixing reaction kettle is fixedly connected with a fixing support, the top end of the outer side of the mixing reaction kettle is uniformly and rotatably provided with fixing threaded rods, the fixing threaded rods are in threaded connection with fixing nuts, the top end of the mixing reaction kettle is fixedly connected with a top supporting ring, and the inner side of the top supporting ring is provided with a beveled sealing groove. Through the design that the main stirring blades and the auxiliary stirring blades are staggered up and down and have the same arc direction, the mixing efficiency is remarkably improved, materials can be fully mixed within a short time, and the reaction speed and the product quality can be improved.

Description

Technical Field

[0001] The invention relates to the field of polyurethane synthesis production, in particular to a dynamic mixing device for polyurethane synthesis production. Background Art

[0002] In many industrial fields such as chemical synthesis and material preparation, mixing reaction devices are indispensable key equipment. With the continuous development of production technology and the increasing requirements for product quality, traditional mixing reaction devices have gradually exposed some problems in practical applications. In the stirring and mixing process, traditional stirring devices often use a simple stirring paddle structure with low stirring efficiency. This single stirring method makes it difficult to fully mix the materials in a short time, resulting in prolonged reaction time, low production efficiency, and affecting product performance and quality. As for sealing performance, traditional reaction devices often leak materials during the stirring process due to imperfect sealing structures. This not only causes waste of materials, but may also pollute the production environment. Therefore, there is an urgent need for dynamic mixing devices for polyurethane synthesis production to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a dynamic mixing device for polyurethane synthesis production to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a dynamic mixing device for polyurethane synthesis production, comprising a synthesis reaction device and a mixing and stirring device, wherein the mixing and stirring device is fixedly installed on the synthesis reaction device, the synthesis reaction device comprises a mixing reaction kettle, the bottom end of the mixing reaction kettle is spherical, the outer side of the mixing reaction kettle is fixedly connected with a fixed bracket, the outer top end of the mixing reaction kettle is evenly rotatably installed with a fixed threaded rod, the fixed threaded rod is threadedly connected with a fixing nut, the top of the mixing reaction kettle is fixedly connected with a top support ring, the inner side of the top support ring is provided with a chamfered sealing groove, the outer side of the top support ring is evenly provided with a first clamping groove, the bottom end of the mixing reaction kettle is fixedly connected with a discharge main pipe, the outer top end of the discharge main pipe is fixedly connected with a discharge pipe, the inner top end of the discharge main pipe is movably plugged with a piston, the bottom end of the piston is rotatably connected with a lifting threaded rod, the bottom end of the lifting threaded rod is fixedly connected with a push-pull rod, and the bottom end of the push-pull rod is fixedly connected with a rotating wheel.

[0005] Preferably, the mixing and stirring device includes a top protective cover, the outer side of the top protective cover is evenly provided with a second card groove, the second card groove matches the first card groove, the bottom end of the top protective cover is fixedly connected with a sealing ring, the outer side of the sealing ring is conical in design, and the outer side of the sealing ring matches the inner side of the beveled sealing groove, and the vertical height of the sealing ring is higher than the vertical height of the beveled sealing groove.

[0006] Preferably, a servo motor is fixedly installed in the middle of the top of the top protective cover, a branch main pipe is fixedly connected to one side of the top of the top protective cover, an exhaust branch pipe is fixedly connected to the outer top of the branch main pipe, a second valve is fixedly installed on the exhaust branch pipe, a feeding branch pipe is fixedly connected to the outer side of the branch main pipe below the exhaust branch pipe, a first valve is fixedly installed on the feeding branch pipe, a main stirring rod is rotatably connected to the middle of the top protective cover, the top of the main stirring rod is fixedly installed on the driving end of the servo motor, a main stirring blade is evenly fixedly connected to the outer side of the main stirring rod, and a Two auxiliary stirring rods, the outer sides of the auxiliary stirring rods are evenly fixedly connected with auxiliary stirring blades, the outer top end of the main stirring rod is fixedly installed with a driving gear, the top end of the top protective cover is symmetrically rotatably connected with two transmission gears, the outer top end of the auxiliary stirring rod is fixedly installed with a driven gear, the bottom end of the sealing ring is fixedly installed with a splash guard plate, the bottom end of the splash guard plate is spherical in design, the main stirring rod and the auxiliary stirring rod are respectively rotatably connected to the bottom end of the splash guard plate, and the main stirring blade and the auxiliary stirring blade are both located at the bottom end of the splash guard plate, and the bottom end of the branch main pipe passes through the splash guard plate and is located at the bottom end of the splash guard plate.

[0007] Preferably, the main stirring blades and the auxiliary stirring blades are arranged in groups of three, the main stirring rod is provided with four groups of the main stirring blades, a group of the main stirring blades located at the bottom end of the main stirring rod is designed to be bent upward at one end away from the main stirring rod, the auxiliary stirring rod is provided with four groups of the auxiliary stirring blades, and the main stirring blades and the auxiliary stirring blades are designed to be staggered up and down, and the arc directions of the main stirring blades and the auxiliary stirring blades are the same.

[0008] Preferably, the top protective cover is arranged at the top end of the top support ring, and the sealing ring is movably inserted into the inner side of the beveled sealing groove, the fixed threaded rod is movably inserted into the inner sides of the first slot and the second slot respectively and fixed by the fixing nut, the main stirring blade and the auxiliary stirring blade are both located inside the mixing reactor, and the curvature of a group of main stirring blades located at the bottom end of the main stirring rod matches the curvature of the bottom end of the mixing reactor.

[0009] Preferably, the bottom end of the feeding branch pipe is designed to be tilted downward, and the tilted end of the feeding branch pipe is fixedly connected to the outside of the branch main pipe, and the top end of the branch main pipe is designed to be sealed.

[0010] Preferably, the driving gear, the transmission gear and the driven gear are located on the same straight line, and the transmission gear is meshedly connected with the driving gear and the driven gear respectively.

[0011] Preferably, the end of the discharge pipe close to the discharge main pipe is designed to be inclined upward, the top of the piston is designed to be convex, and the lifting threaded rod is threadedly connected to the inner side of the discharge main pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts the cooperation of the beveled sealing groove and the sealing ring in the sealing connection between the mixing and stirring device and the synthesis reaction device, and strengthens the sealing by combining the fixing method of the fixed threaded rod and the fixed nut, and seals the branch main pipe by the first valve and the second valve, and seals the discharge pipe by the piston and the lifting threaded rod. This design ensures that the sealing inside the device is good during the mixing and stirring operation, prevents material leakage, and also ensures the stability of the device during operation. The servo motor in the mixing and stirring device drives the main stirring rod to rotate, and through the transmission of the driving gear, the transmission gear and the driven gear, the auxiliary stirring rod is driven to rotate in the same direction. The main stirring blade and the auxiliary stirring blade are designed to be staggered up and down and have the same arc direction, so that they exert opposite forces on the materials in the vicinity of the main stirring blade and the auxiliary stirring blade when rotating, greatly increasing the shear force on the materials, thereby significantly improving the mixing efficiency, enabling the materials to be fully mixed in a short time, which is beneficial to improving the reaction speed and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure of the synthesis reaction device in the present invention; Figure 3 It is a schematic diagram of the cutaway structure of the synthesis reaction device in the present invention; Figure 4 It is a schematic diagram of the structure of the mixing and stirring device in the present invention; Figure 5 It is a schematic diagram of the bottom structure of the mixing and stirring device in the present invention.

[0014] In the figure: 1-synthesis reaction device, 2-mixing and stirring device, 3-mixing reactor, 4-top support ring, 5-fixed threaded rod, 6-first slot, 7-bevel sealing groove, 8-fixed bracket, 9-discharge main pipe, 10-fixed nut, 11-discharge pipe, 12-piston, 13-lifting threaded rod, 14-push-pull rod, 15-rotating wheel, 16-top protective cover, 17-second slot, 18-servo motor, 19-branch main pipe, 20-feeding branch pipe, 21-first valve, 22-exhaust branch pipe, 23-main stirring rod, 24-main stirring blade, 25-auxiliary stirring rod, 26-auxiliary stirring blade, 27-driving gear, 28-transmission gear, 29-driven gear, 30-sealing ring, 31-splash guard plate, 32-second valve. DETAILED DESCRIPTION

[0015] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-Figure 3 An embodiment of the present invention is as follows: a dynamic mixing device for polyurethane synthesis production comprises a synthesis reaction device 1 and a mixing and stirring device 2, wherein the mixing and stirring device 2 is fixedly mounted on the synthesis reaction device 1, and the synthesis reaction device 1 comprises a mixing reaction kettle 3, wherein the bottom end of the mixing reaction kettle 3 is spherical in design, a fixing bracket 8 is fixedly connected to the outside of the mixing reaction kettle 3, a fixing threaded rod 5 is evenly rotated and mounted on the top of the outside of the mixing reaction kettle 3, a fixing nut 10 is threadedly connected to the fixing threaded rod 5, a top support ring 4 is fixedly connected to the top of the mixing reaction kettle 3, a chamfered sealing groove 7 is provided on the inner side of the top support ring 4, a first card groove 6 is evenly provided on the outer side of the top support ring 4, and a fixing bracket 8 is fixedly connected to the bottom of the mixing reaction kettle 3. A discharge main pipe 9, the outer top of the discharge main pipe 9 is fixedly connected with a discharge pipe 11, the inner top of the discharge main pipe 9 is movably inserted with a piston 12, the bottom end of the piston 12 is rotatably connected with a lifting threaded rod 13, the bottom end of the lifting threaded rod 13 is fixedly connected with a push-pull rod 14, the bottom end of the push-pull rod 14 is fixedly connected with a rotating wheel 15, the end of the discharge pipe 11 close to the discharge main pipe 9 is designed to be upwardly inclined, so as to facilitate the discharge of materials, the top of the piston 12 is designed to be convex, the lifting threaded rod 13 is threadedly connected to the inner side of the discharge main pipe 9, and the rotation of the lifting threaded rod 13 makes the lifting threaded rod 13 move up and down inside the discharge main pipe 9, thereby driving the piston 12 to move up and down, so as to realize the opening and closing of the discharge pipe 11 by the piston 12.

[0017] See also Figure 4 and Figure 5The mixing and stirring device 2 includes a top protective cover 16, and a second card groove 17 is evenly opened on the outer side of the top protective cover 16, and the second card groove 17 matches the first card groove 6. A sealing ring 30 is fixedly connected to the bottom end of the top protective cover 16, and the outer side of the sealing ring 30 is conical in design, and the outer side of the sealing ring 30 matches the inner side of the beveled sealing groove 7, and the vertical height of the sealing ring 30 is higher than the vertical height of the beveled sealing groove 7. The sealing effect can be enhanced by the design of the beveled surface.

[0018] A servo motor 18 is fixedly installed in the middle of the top of the top protective cover 16, a branch main pipe 19 is fixedly connected to one side of the top of the top protective cover 16, an exhaust branch pipe 22 is fixedly connected to the top of the outer side of the branch main pipe 19, a second valve 32 is fixedly installed on the exhaust branch pipe 22, and a vacuum pump and other equipment can be installed on the end of the exhaust branch pipe 22 away from the branch main pipe 19 to provide conditions for the reaction of materials inside the mixing reactor 3. A feeding branch pipe 20 is fixedly connected to the outer side of the branch main pipe 19 below the exhaust branch pipe 22, which is convenient for adding materials or catalysts at any time during the reaction process, thereby improving the flexibility of operation. A first valve 21 is fixedly installed on the feeding branch pipe 20, a main stirring rod 23 is rotatably connected to the middle of the top protective cover 16, the top of the main stirring rod 23 is fixedly installed on the driving end of the servo motor 18, and the main stirring rod 23 is driven to rotate by starting the servo motor 18, a main stirring blade 24 is evenly and fixedly connected to the outer side of the main stirring rod 23, and two auxiliary stirring rods are symmetrically rotatably connected to the top protective cover 16 25, the outer side of the auxiliary stirring rod 25 is evenly fixedly connected with an auxiliary stirring blade 26, the outer top of the main stirring rod 23 is fixedly installed with a driving gear 27, the top of the top protective cover 16 is symmetrically rotatably connected with two transmission gears 28, the outer top of the auxiliary stirring rod 25 is fixedly installed with a driven gear 29, the bottom end of the sealing ring 30 is fixedly installed with a splash guard plate 31, the bottom end of the splash guard plate 31 is spherical, the main stirring rod 23 and the auxiliary stirring rod 25 are respectively rotatably connected to the bottom end of the splash guard plate 31, and The main stirring blade 24 and the auxiliary stirring blade 26 are both located at the bottom end of the splash guard plate 31, and the bottom end of the branch main pipe 19 passes through the splash guard plate 31 and is located at the bottom end of the splash guard plate 31. The design of the splash guard plate 31 can prevent the material inside the mixing reactor 3 from splashing at the bottom end of the top protective cover 16, thereby reducing the difficulty of cleaning. The spherical design of the bottom end of the splash guard plate 31 allows the material splashed from the bottom end of the splash guard plate 31 to slide toward the middle of the bottom end of the splash guard plate 31 and fall into the inside of the mixing reactor 3, thereby reducing material loss.

[0019] The bottom end of the feeding branch pipe 20 is designed to be tilted downward, and the tilted end of the feeding branch pipe 20 is fixedly connected to the outside of the branch main pipe 19. The tilted design can make the material box branch main pipe 19 inside the feeding branch pipe 20 slide down, thereby reducing the material residue inside the feeding branch pipe 20. The top of the branch main pipe 19 is designed to be sealed. The driving gear 27, the transmission gear 28 and the driven gear 29 are located on the same straight line, and the transmission gear 28 is meshed and connected with the driving gear 27 and the driven gear 29 respectively. The rotation of the driving gear 27 drives the transmission gear 28 to rotate, and the rotating transmission gear 28 drives the driven gear 29 to rotate, thereby realizing the synchronous rotation of the driving gear 27 and the driven gear 29.

[0020] The main stirring blades 24 and the auxiliary stirring blades 26 are each arranged in groups of three. Four groups of main stirring blades 24 are arranged on the main stirring rod 23. One end of a group of main stirring blades 24 located at the bottom of the main stirring rod 23 away from the main stirring rod 23 is bent upward. Four groups of auxiliary stirring blades 26 are arranged on the auxiliary stirring rod 25. The main stirring blades 24 and the auxiliary stirring blades 26 are designed to be staggered up and down, and the arc directions of the main stirring blades 24 and the auxiliary stirring blades 26 are the same. The synchronous rotation of the driving gear 27 and the driven gear 29 causes the main stirring blades 24 and the auxiliary stirring blades 26 to rotate synchronously. The adjacent sides of the synchronously rotating main stirring blades 24 and the auxiliary stirring blades 26 rotate in opposite directions, thereby realizing bidirectional shearing of materials at the same position, strengthening the shearing force of the main stirring blades 24 and the auxiliary stirring blades 26, significantly improving the mixing efficiency, enabling the materials to be fully mixed in a short time, and being beneficial to improving the reaction speed and product quality.

[0021] See also Figure 1-Figure 5 The top protective cover 16 is arranged at the top of the top support ring 4, and the sealing ring 30 is movably inserted in the inner side of the beveled sealing groove 7, and the fixed threaded rod 5 is movably inserted in the inner side of the first card slot 6 and the second card slot 17 respectively and fixed by the fixing nut 10. The fixed threaded rod 5 is rotated upward by external force so that the fixed threaded rod 5 is inserted in the inner side of the first card slot 6 and the second card slot 17, and then the fixing nut 10 is screwed close to the top of the top protective cover 16 until the bottom end of the fixing nut 10 is close to the top of the top protective cover 16, and the top protective cover 16 is squeezed downward by the fixing nut 10. The cover 16 makes the outer side of the sealing ring 30 and the inner side of the beveled sealing groove 7 fit tightly to achieve a sealing effect, ensuring that the inside of the device is well sealed during the stirring and mixing operation to prevent material leakage, while also ensuring the stability of the device during operation. The main stirring blade 24 and the auxiliary stirring blade 26 are both located inside the mixing reactor 3, and the curvature of a group of main stirring blades 24 located at the bottom end of the main stirring rod 23 matches the curvature of the bottom end of the mixing reactor 3, which can push the material at the bottom end of the mixing reactor 3 upward to accelerate the mixing of the material.

[0022] Working principle: During use, the synthetic reaction device 1 is first fixed on a wall or a fixed frame by a fixing bracket 8, and then the discharge pipe 11 is closed, and the rotating wheel 15 is rotated by an external force. The movement of the rotating wheel 15 drives the push-pull rod 14 and the lifting threaded rod 13 to rotate. Since the lifting threaded rod 13 is threadedly connected to the inside of the discharge main pipe 9, the rotation of the lifting threaded rod 13 causes the lifting threaded rod 13 to push the piston 12 to move upward. When the top of the piston 12 is located inside the mixing reactor 3, it stops rotating, and then the required materials are placed inside the mixing reactor 3. After the materials are placed, the mixing is stirred. The device 2 is sealed at the top of the synthesis reaction device 1, and the mixing and stirring device 2 is placed at the top of the synthesis reaction device 1 by external force, and the sealing ring 30 is located at the inner side of the beveled sealing groove 7, and the second clamping groove 17 and the first clamping groove 6 overlap, and then the fixed threaded rod 5 is rotated upward by external force, so that the fixed threaded rod 5 is inserted into the inner side of the first clamping groove 6 and the second clamping groove 17, and then the fixing nut 10 is screwed close to the top of the top protective cover 16 until the bottom end of the fixing nut 10 is close to the top of the top protective cover 16, at this time, the outer side of the sealing ring 30 and the inner side of the beveled sealing groove 7 are closely fitted, and then the mixing and stirring operation can be carried out; The servo motor 18 is turned on to start stirring. The driving end of the servo motor 18 drives the main stirring rod 23 to rotate. The rotating main stirring rod 23 drives the driving gear 27 to rotate. Since the transmission gear 28 is meshed and connected with the driving gear 27 and the driven gear 29 respectively, the rotating driving gear 27 can drive the driven gear 29 to rotate in the same direction. The rotation of the driven gear 29 drives the auxiliary stirring rod 25 to rotate. The rotation of the main stirring rod 23 and the auxiliary stirring rod 25 respectively drives the main stirring blade 24 and the auxiliary stirring blade 26 to rotate. The rotating main stirring blade 24 drives the material inside the mixing reactor 3 to rotate. Since the main stirring blade 24 and the auxiliary stirring blade 26 are designed to be staggered up and down, and the arc directions of the main stirring blade 24 and the auxiliary stirring blade 26 are the same, the adjacent side of the main stirring blade 24 and the auxiliary stirring blade 26 rotate in the opposite direction. Under the synchronous rotation of the main stirring blade 24 and the auxiliary stirring blade 26, opposite forces are applied to the material, so that the shear force of the main stirring blade 24 and the auxiliary stirring blade 26 on the material is increased, thereby accelerating the mixing efficiency. When it is necessary to add materials or catalysts, the first valve 21 is opened by external force, and the materials or catalysts are added to the interior of the mixing reactor 3 through the feeding branch pipe 20. After the addition is completed, the first valve 21 is closed. When a vacuum reaction is required, the end of the feeding branch pipe 20 away from the branch main pipe 19 is connected to the vacuum pump and the second valve 32 is opened. The excess air inside the mixing reactor 3 is extracted by the vacuum pump. When a sealed reaction is required, the second valve 32 is closed. After the reaction is completed, the servo motor 18 is turned off and the first valve 21 and the second valve 32 are opened. Then, the storage barrel is placed at the bottom end of the discharge pipe 11, and the rotating wheel 15 is rotated by external force. The rotating rotating wheel 15 drives the lifting threaded rod 13 to rotate so that the lifting threaded rod 13 drives the piston 12 to move downward. When the top end of the piston 12 moves to the bottom end of the connection between the discharge pipe 11 and the discharge main pipe 9, the liquid inside the mixing reactor 3 is discharged through the discharge pipe 11.

[0023] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that numerous changes, modifications, substitutions and alterations may be made to the embodiments without departing from the spirit and scope of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dynamic mixing device for polyurethane synthesis production, comprising a synthesis reaction device (1) and a mixing and stirring device (2), characterized in that: The mixing and stirring device (2) is fixedly mounted on the synthesis reaction device (1), and the synthesis reaction device (1) comprises a mixing reaction kettle (3), the bottom end of the mixing reaction kettle (3) is spherical in design, a fixed bracket (8) is fixedly connected to the outside of the mixing reaction kettle (3), a fixed threaded rod (5) is evenly rotatably mounted on the top of the outside of the mixing reaction kettle (3), a fixed nut (10) is threadedly connected to the fixed threaded rod (5), a top support ring (4) is fixedly connected to the top of the mixing reaction kettle (3), and the inner side of the top support ring (4) is opened. A beveled sealing groove (7) is provided, and the outer side of the top support ring (4) is evenly provided with a first clamping groove (6). The bottom end of the mixing reactor (3) is fixedly connected to a discharge pipe (9), the outer top end of the discharge pipe (9) is fixedly connected to a discharge pipe (11), the inner top end of the discharge pipe (9) is movably connected to a piston (12), the bottom end of the piston (12) is rotatably connected to a lifting threaded rod (13), the bottom end of the lifting threaded rod (13) is fixedly connected to a push-pull rod (14), and the bottom end of the push-pull rod (14) is fixedly connected to a rotating wheel (15).

2. The dynamic mixing device for polyurethane synthesis production according to claim 1, characterized in that: The mixing and stirring device (2) comprises a top protective cover (16), the outer side of the top protective cover (16) is evenly provided with second slots (17), the second slots (17) match the first slots (6), the bottom end of the top protective cover (16) is fixedly connected with a sealing ring (30), the outer side of the sealing ring (30) is conical in design, the outer side of the sealing ring (30) matches the inner side of the beveled sealing groove (7), and the vertical height of the sealing ring (30) is higher than the vertical height of the beveled sealing groove (7).

3. The dynamic mixing device for polyurethane synthesis production according to claim 2, characterized in that: A servo motor (18) is fixedly mounted at the middle of the top of the top protective cover (16); a branch main pipe (19) is fixedly connected to one side of the top of the top protective cover (16); an exhaust branch pipe (22) is fixedly connected to the top of the outer side of the branch main pipe (19); a second valve (32) is fixedly mounted on the exhaust branch pipe (22); a feeding branch pipe (20) is fixedly connected to the outer side of the branch main pipe (19) below the exhaust branch pipe (22); a first valve (21) is fixedly mounted on the feeding branch pipe (20); a main stirring rod (23) is rotatably connected to the middle of the top protective cover (16); the top of the main stirring rod (23) is fixedly mounted on the driving end of the servo motor (18); a main stirring blade (24) is evenly fixedly connected to the outer side of the main stirring rod (23); and two auxiliary stirring blades (24) are symmetrically rotatably connected to the top protective cover (16). A stirring rod (25), wherein the outer side of the auxiliary stirring rod (25) is evenly fixedly connected with an auxiliary stirring blade (26), the outer top end of the main stirring rod (23) is fixedly installed with a driving gear (27), the top end of the top protective cover (16) is symmetrically rotatably connected with two transmission gears (28), the outer top end of the auxiliary stirring rod (25) is fixedly installed with a driven gear (29), the bottom end of the sealing ring (30) is fixedly installed with a splash guard plate (31), the bottom end of the splash guard plate (31) is spherical in design, the main stirring rod (23) and the auxiliary stirring rod (25) are respectively rotatably connected to the bottom end of the splash guard plate (31), and the main stirring blade (24) and the auxiliary stirring blade (26) are both located at the bottom end of the splash guard plate (31), and the bottom end of the branch main pipe (19) passes through the splash guard plate (31) and is located at the bottom end of the splash guard plate (31).

4. The dynamic mixing device for polyurethane synthesis production according to claim 3, characterized in that: The main stirring blades (24) and the auxiliary stirring blades (26) are each arranged in groups of three. The main stirring rod (23) is provided with four groups of the main stirring blades (24). One end of a group of the main stirring blades (24) located at the bottom end of the main stirring rod (23) away from the main stirring rod (23) is designed to be bent upward. The auxiliary stirring rod (25) is provided with four groups of the auxiliary stirring blades (26). The main stirring blades (24) and the auxiliary stirring blades (26) are designed to be staggered up and down, and the arc directions of the main stirring blades (24) and the auxiliary stirring blades (26) are the same.

5. The dynamic mixing device for polyurethane synthesis production according to claim 3, characterized in that: The top protective cover (16) is arranged at the top end of the top support ring (4), and the sealing ring (30) is movably inserted into the inner side of the beveled sealing groove (7), the fixed threaded rod (5) is movably inserted into the inner side of the first clamping groove (6) and the second clamping groove (17) respectively and fixed by the fixing nut (10), the main stirring blade (24) and the auxiliary stirring blade (26) are both located inside the mixing reactor (3), and the curvature of the group of main stirring blades (24) located at the bottom end of the main stirring rod (23) matches the curvature of the bottom end of the mixing reactor (3).

6. The dynamic mixing device for polyurethane synthesis production according to claim 3, characterized in that: The bottom end of the feeding branch pipe (20) is designed to be inclined downward, and the inclined end of the feeding branch pipe (20) is fixedly connected to the outside of the branch main pipe (19), and the top end of the branch main pipe (19) is designed to be sealed.

7. The dynamic mixing device for polyurethane synthesis production according to claim 3, characterized in that: The driving gear (27), the transmission gear (28) and the driven gear (29) are located on the same straight line, and the transmission gear (28) is meshedly connected with the driving gear (27) and the driven gear (29) respectively.

8. The dynamic mixing device for polyurethane synthesis production according to claim 1, characterized in that: The end of the discharge pipe (11) close to the discharge main pipe (9) is designed to be inclined upward, the top of the piston (12) is designed to be convex, and the lifting threaded rod (13) is threadedly connected to the inner side of the discharge main pipe (9).

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