A mixing device for producing a polyurethane prepolymer

Abstract

This utility model belongs to the field of polyurethane prepolymer production technology, specifically relating to a mixing device for polyurethane prepolymer production. It includes an outer tank with a feed inlet at its top. An inner tank is rotatably connected to the outer tank, and a perforated plate is fixedly connected to the inner wall of the inner tank. A motor is mounted above the outer tank, driving a stirring mechanism, which includes a rotating shaft. This mixing device for polyurethane prepolymer production, through the use of the stirring mechanism and the motor-driven rotating shaft, utilizes bevel gear transmission to cause the inner tank and the rotating shaft to rotate in opposite directions. This overcomes the problem of material accumulation during traditional feeding. During feeding, the rotation of the inner tank evenly disperses the raw materials in different areas within the tank, avoiding concentrated accumulation and providing a more uniform material base for subsequent mixing. This reduces mixing dead zones caused by uneven initial distribution, improves mixing efficiency, and facilitates a more complete reaction of the polyurethane prepolymer.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane prepolymer production technology, specifically a mixing device for polyurethane prepolymer production. Background Technology

[0002] In the field of polymer materials, polyurethane prepolymers are a key intermediate product, and their performance directly affects the quality and application performance of subsequent polyurethane products. Polyurethane prepolymers are generated by reacting polyisocyanates and polyols in a certain proportion under specific conditions, and a mixing device is required during the reaction process.

[0003] Currently, the feed inlet of traditional polyurethane prepolymer production mixing devices is usually fixed at the top of the mixing tank. When the material is added to the mixing tank through the feed inlet, it will accumulate in one place, making it difficult for the material to be quickly and evenly mixed during the subsequent stirring process. In view of this, a mixing device for polyurethane prepolymer production is proposed. Utility Model Content

[0004] The main objective of this invention is to provide a mixing device for the production of polyurethane prepolymers, which can solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention proposes a mixing device for polyurethane prepolymer production, comprising an outer tank with a feed inlet at the top, an inner tank rotatably connected to the inner tank, a through-hole plate fixedly connected to the inner wall of the inner tank, and a motor mounted above the outer tank to drive a stirring mechanism. The stirring mechanism includes:

[0006] A rotating shaft is fixedly connected to the output shaft of the motor. The rotating shaft passes through bevel gear one and bevel gear two. The rotating shaft is fixedly connected to bevel gear one and rotatably connected to bevel gear two.

[0007] The third bevel gear meshes with the first bevel gear and the second bevel gear. A turntable is fixedly connected to the bottom of the second bevel gear, and a connecting piece is fixedly connected to the lower side of the turntable. A stirring blade is fixedly connected to the outer wall of the rotating shaft.

[0008] The dispersion component is located above the through-hole plate. The output shaft of the motor rotates, which drives the rotating shaft to rotate, which in turn drives the first bevel gear to rotate. Under the transmission action of the third bevel gear, the second bevel gear drives the turntable to rotate in the opposite direction to the rotation of the rotating shaft.

[0009] Preferably, the turntable is penetrated by a rotating shaft and rotatably connected to the rotating shaft.

[0010] Preferably, the end of the connector away from the turntable is fixed to the inner wall of the inner tank, and the stirring blade is located below the through-hole plate. During the rotation of the turntable, the inner tank is rotated under the action of the connector, so that the raw material at the feed port will not accumulate when it enters the inner tank.

[0011] Preferably, the dispersing component includes a fixed ring, an elastic telescopic rod fixedly connected to the lower side of the fixed ring, a rotating ring fixedly connected to the telescopic end of the elastic telescopic rod, an arc-shaped plate fixedly connected to the outer wall of the rotating ring, a bracket fixedly connected to the lower side of the rotating ring, and a rotating wheel rotatably connected to the bottom of the bracket. By rotating the shaft, the fixed ring can be driven to rotate, and then the rotating ring is rotated under the action of the elastic telescopic rod, and the arc-shaped plate disperses the raw material on the through-hole plate.

[0012] Preferably, the fixed ring is penetrated by the rotating shaft and fixedly connected to the rotating shaft, and the rotating ring is sleeved on the outer wall of the rotating shaft.

[0013] Preferably, a protective shell and a U-shaped plate are fixedly connected to the upper side of the outer tank.

[0014] Preferably, the bevel gear three is rotatably connected to the inner wall of the protective shell via a connecting shaft, and the motor is fixedly installed on the upper side of the U-shaped plate.

[0015] Preferably, the upper side of the perforated plate is provided with multiple sets of protrusions, and the protrusions are hemispherical. When the rotating ring rotates, the rotating wheel can move on the perforated plate. During the process of passing through the protrusions, the telescopic end of the elastic telescopic rod extends and retracts, the rotating ring moves up and down, and then the arc plate moves up and down, which improves the dispersion effect of the raw materials and vibrates the perforated plate, thus accelerating the passage of the raw materials through the perforated plate.

[0016] This invention provides a mixing device for the production of polyurethane prepolymers. It has the following advantages:

[0017] (1) The mixing device for polyurethane prepolymer production uses a stirring mechanism. The motor drives the rotating shaft to rotate, and the inner tank rotates in the opposite direction to the rotating shaft using bevel gear transmission. This changes the traditional problem of material accumulation during feeding. When feeding, the inner tank rotates so that the raw materials are evenly dispersed in different areas of the tank, avoiding concentrated accumulation. This provides a more uniform material base for subsequent stirring, reduces the stirring dead corners caused by uneven initial distribution, improves mixing efficiency, and helps the polyurethane prepolymer to react more fully.

[0018] (2) The mixing device for polyurethane prepolymer production uses a dispersion component in conjunction with a perforated plate. The rotating shaft drives the arc plate to rotate and disperse the raw materials. The rotating wheel causes the arc plate to move up and down through the hemispherical protrusion, which not only enhances the dispersion effect but also vibrates the perforated plate. This not only allows the raw materials to pass through the perforated plate more evenly but also speeds up the plate passage, avoids raw material blockage, ensures a smooth mixing process, and improves the overall quality of the mixing process in polyurethane prepolymer production. Attached Figure Description

[0019] 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 the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0021] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0022] Figure 3 This is a partial three-dimensional structural diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the distributed component of this utility model;

[0024] Figure 5 This utility model Figure 3 Schematic diagram of structure A in the middle.

[0025] Explanation of icon numbers:

[0026] 1. Outer tank; 2. Feed inlet; 3. Inner tank; 4. Through-hole plate; 5. Stirring mechanism; 6. Motor; 101. Protective shell; 102. U-shaped plate; 41. Protrusion; 51. Rotating shaft; 52. Bevel gear one; 53. Bevel gear two; 54. Bevel gear three; 55. Turntable; 56. Connecting parts; 57. Dispersion assembly; 58. Stirring blade; 571. Fixing ring; 572. Elastic telescopic rod; 573. Rotating ring; 574. Arc plate; 575. Support; 576. Rotating wheel.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-5 This utility model proposes a mixing device for the production of polyurethane prepolymer, including an outer tank 1. A protective shell 101 and a U-shaped plate 102 are fixedly connected to the upper side of the outer tank 1. A feed inlet 2 is opened on the top of the outer tank 1. An inner tank 3 is rotatably connected inside the outer tank 1. A through-hole plate 4 is fixedly connected to the inner wall of the inner tank 3. A motor 6 is arranged above the outer tank 1. The motor 6 is fixedly installed on the upper side of the U-shaped plate 102 and drives the stirring mechanism 5 to move.

[0030] In this embodiment of the invention, the stirring mechanism 5 includes a rotating shaft 51, a third bevel gear 54, and a dispersing component 57. The rotating shaft 51 is fixedly connected to the output shaft of the motor 6. The rotating shaft 51 passes through the first bevel gear 52 and the second bevel gear 53. The rotating shaft 51 is fixedly connected to the first bevel gear 52 and rotatably connected to the second bevel gear 53. The third bevel gear 54 meshes with the first bevel gear 52 and the second bevel gear 53. The third bevel gear 54 is rotatably connected to the inner wall of the protective shell 101 via a connecting shaft. A turntable 55 is fixedly connected to the bottom of the second bevel gear 53. The turntable 55 is penetrated by the rotating shaft 51 and rotatably connected to the rotating shaft 51. A connecting piece 56 is fixedly connected to the lower side of the turntable 55. A stirring blade 58 is fixedly connected to the outer wall of the rotating shaft 51. The dispersing component 57 is provided. Above the perforated plate 4, the end of the connector 56 away from the turntable 55 is fixed to the inner wall of the inner tank 3. The stirring blade 58 is located below the perforated plate 4. The output shaft of the motor 6 rotates, driving the rotating shaft 51 to rotate, which in turn drives the first bevel gear 52 to rotate. Under the transmission action of the third bevel gear 54, the second bevel gear 53 drives the turntable 55 to rotate in the opposite direction to the rotation of the rotating shaft 51. During the rotation of the turntable 55, the connector 56 can be driven to move, causing the inner tank 3 to rotate. The rotation of the inner tank 3 allows the raw materials to be evenly dispersed in different areas of the tank, avoiding concentrated accumulation, providing a more uniform material base for subsequent mixing, reducing the mixing dead zones caused by uneven initial distribution, improving mixing efficiency, and helping the polyurethane prepolymer reaction to be more complete.

[0031] Furthermore, the upper side of the through-hole plate 4 is provided with multiple sets of protrusions 41, and the protrusions 41 are hemispherical. The dispersion component 57 includes a fixing ring 571, an elastic telescopic rod 572 is fixedly connected to the lower side of the fixing ring 571, a rotating ring 573 is fixedly connected to the telescopic end of the elastic telescopic rod 572, an arc-shaped plate 574 is fixedly connected to the outer wall of the rotating ring 573, a bracket 575 is fixedly connected to the lower side of the rotating ring 573, and a rotating wheel 576 is rotatably connected to the bottom of the bracket 575. The fixing ring 571 is penetrated by the rotating shaft 51 and fixedly connected to the rotating shaft 51. The rotating ring 573 is sleeved on the outer wall of the rotating shaft 51. By rotating the rotating shaft 51, the fixing ring can be driven. 571 rotates, and under the action of the elastic telescopic rod 572, the rotating ring 573 rotates. The arc plate 574 disperses the raw material on the through-hole plate 4. During the rotation of the rotating ring 573, the rotating wheel 576 can move on the through-hole plate 4. During the process of passing through the protrusion 41, the telescopic end of the elastic telescopic rod 572 extends and retracts, the rotating ring 573 moves up and down, and then the arc plate 574 moves up and down, which improves the dispersion effect of the raw material and vibrates the through-hole plate 4, speeds up the passage of the raw material through the through-hole plate 4, avoids raw material blockage, ensures smooth mixing process, and improves the overall quality of the mixing process in the production of polyurethane prepolymer.

[0032] It should be noted that the above electrical components are all existing technology products. Those skilled in the art should select, install and complete the circuit debugging work according to the needs of use to ensure that all electrical appliances can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here.

[0033] In use, by starting motor 6, the output shaft of motor 6 rotates, driving the rotating shaft 51 to rotate, which in turn drives the first bevel gear 52 to rotate. Under the transmission action of the third bevel gear 54, the second bevel gear 53 drives the turntable 55 to rotate in the opposite direction to the rotation of the rotating shaft 51. During the rotation of the turntable 55, it can drive the connecting piece 56 to move, causing the inner tank 3 to rotate. The raw material added from the feed port 2 can be evenly distributed on the through-hole plate 4. At the same time, the rotation of the rotating shaft 51 can drive the fixed ring 571 to rotate, thereby... Under the action of the elastic telescopic rod 572, the rotating ring 573 rotates, and the arc plate 574 disperses the raw material on the through-hole plate 4. During the rotation of the rotating ring 573, the rotating wheel 576 can move on the through-hole plate 4. During the process of passing through the protrusion 41, the telescopic end of the elastic telescopic rod 572 extends and retracts, the rotating ring 573 moves up and down, and then the arc plate 574 moves up and down, which improves the dispersion effect of the raw material and vibrates the through-hole plate 4, speeding up the passage of the raw material through the through-hole plate 4 and avoiding the blockage of the raw material.

[0034] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A mixing apparatus for producing polyurethane prepolymer, comprising an outer tank (1), characterized in that: The outer tank (1) has a feed inlet (2) at its top. An inner tank (3) is rotatably connected to the inside of the outer tank (1). A through-hole plate (4) is fixedly connected to the inner wall of the inner tank (3). A motor (6) is installed above the outer tank (1). The motor (6) drives the stirring mechanism (5) to move. The stirring mechanism (5) includes: A rotating shaft (51) is fixedly connected to the output shaft of a motor (6). The rotating shaft (51) passes through a first bevel gear (52) and a second bevel gear (53). The rotating shaft (51) is fixedly connected to the first bevel gear (52) and rotatably connected to the second bevel gear (53). The bevel gear three (54) meshes with the bevel gear one (52) and the bevel gear two (53). The bottom of the bevel gear two (53) is fixedly connected to a turntable (55). The lower side of the turntable (55) is fixedly connected to a connector (56). The outer wall of the rotating shaft (51) is fixedly connected to a stirring blade (58). Dispersion component (57) is disposed above the through-hole plate (4).

2. The mixing apparatus for producing polyurethane prepolymer according to claim 1, characterized in that: The turntable (55) is penetrated by the rotating shaft (51) and is rotatably connected to the rotating shaft (51).

3. The mixing apparatus for producing polyurethane prepolymer according to claim 1, characterized in that: The end of the connector (56) away from the turntable (55) is fixed to the inner wall of the inner tank (3), and the stirring blade (58) is located below the through-hole plate (4).

4. A mixing apparatus for producing polyurethane prepolymer according to claim 1, characterized in that: The dispersing component (57) includes a fixed ring (571), an elastic telescopic rod (572) is fixedly connected to the lower side of the fixed ring (571), a rotating ring (573) is fixedly connected to the telescopic end of the elastic telescopic rod (572), an arc plate (574) is fixedly connected to the outer wall of the rotating ring (573), a bracket (575) is fixedly connected to the lower side of the rotating ring (573), and a rotating wheel (576) is rotatably connected to the bottom of the bracket (575).

5. A mixing apparatus for producing polyurethane prepolymer according to claim 4, characterized in that: The fixed ring (571) is penetrated by the rotating shaft (51) and fixedly connected to the rotating shaft (51), and the rotating ring (573) is sleeved on the outer wall of the rotating shaft (51).

6. A mixing apparatus for producing polyurethane prepolymer according to claim 1, characterized in that: The outer tank (1) is fixedly connected to a protective shell (101) and a U-shaped plate (102) on its upper side.

7. A mixing apparatus for producing polyurethane prepolymer according to claim 6, characterized in that: The bevel gear three (54) is rotatably connected to the inner wall of the protective shell (101) via a connecting shaft, and the motor (6) is fixedly installed on the upper side of the U-shaped plate (102).

8. A mixing apparatus for producing polyurethane prepolymer according to claim 5, characterized in that: The upper side of the through-hole plate (4) is provided with multiple sets of protrusions (41), and the protrusions (41) are hemispherical.

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