A twin-helix mixing apparatus for preparing polyurethane resin

Abstract

This utility model discloses a double-helix mixing device for polyurethane resin preparation, relating to the field of reactor technology. It includes a reactor body, a cover disposed above the reactor body, an inner plate disposed above the interior of the reactor body, and a drive motor disposed on the cover. The cover has an opening in its center, and the inner plate has a circular rotating plate in its center. A motor connecting rod is disposed at the bottom of the drive motor and is fixed to the rotating plate through the opening. Two arc-shaped, inwardly movable limiting blocks are disposed in the center of the cover near the motor connecting rod, and each limiting block has a slot for fixing the limiting range. The inner plate has fixing holes on both sides near the reactor body. Two sets of rotating rods are disposed inside the reactor body and fixed to the bottom of the inner plate through the fixing holes. Each rotating rod has spiral blades for stirring and mixing the polyurethane resin raw materials. The design of the limiting blocks and threaded connections prevents the connecting rods from deviating from their movement path due to vibration or pressure during the mixing process.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and more specifically to a double-helix mixing device for preparing polyurethane resin. Background Technology

[0002] Polyurethane resin is a polymer material widely used in coatings, foams, elastomers and other fields; it is produced by the chemical reaction of isocyanate and polyol; mixing and heating are critical steps in the preparation of polyurethane resin.

[0003] The existing mixing device, as shown in the patent application number CN201920773535.0, is a mixing device for epoxy resin mixing. This patent uses a drive mechanism to drive the rotating ring to rotate and invert the mixing tank, which can improve the mixing efficiency. However, inverting the mixing tank can easily cause the rotating rod to deviate from its movement path due to vibration, which can damage the equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a double-helix mixing apparatus for preparing polyurethane resin in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] This utility model proposes a double-helix mixing device for preparing polyurethane resin, including a kettle body, a cover body disposed above the kettle body, an inner plate disposed above the interior of the kettle body, and a drive motor disposed on the cover body.

[0007] The cover has an opening in the middle, the inner plate has a circular rotating plate in the middle, the drive motor has a motor connecting rod at the bottom and is fixed to the rotating plate through the opening, and the cover has two arc-shaped inwardly movable limiting blocks near the motor connecting rod in the middle, and the limiting blocks have slots for fixing the limiting range.

[0008] The inner plate is provided with fixing holes on both sides near the reactor body. Two sets of rotating rods are provided inside the reactor body and fixed to the bottom of the inner plate through the fixing holes. The rotating rods are provided with spiral fan blades for stirring and mixing polyurethane resin raw materials. The inner ring surface of the reactor body is provided with several layers of electric heating rings for heating the mixing raw materials.

[0009] As a preferred embodiment of this utility model, the lid is provided with L-shaped fixing blocks on both sides of the vessel body.

[0010] As a preferred technical solution of this utility model, the heating rings are arranged in a way that they are more concentrated in the middle of the vessel body and more sparse on the upper and lower sides of the vessel body.

[0011] As a preferred technical solution of this utility model, the bottom end of the kettle body is provided with a discharge port.

[0012] As a preferred technical solution of this utility model, the slot is provided with threads, and the two limiting blocks are connected by threads.

[0013] The beneficial effects of this utility model are as follows:

[0014] The double-helix rotor design ensures that the material is subjected to sufficient shearing and agitation during mixing, improving the uniformity and efficiency of the mixture; it also ensures that the polyurethane resin raw materials are fully mixed. The limit block, with its threaded connection, prevents the connecting rod from deviating from its movement path due to vibration or pressure during mixing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an enlarged view of point A of this utility model;

[0017] Figure 3 This is an enlarged view of section B of this utility model.

[0018] Reference numerals: 1. Kettle body; 2. Cover body; 3. Inner plate; 4. Drive motor; 5. Discharge port; 11. Heating ring; 12. Ring surface; 21. Fixing block; 22. Opening; 23. Limiting block; 24. Slot; 31. Rotary rod; 32. Fixing hole; 33. Spiral fan blade; 34. Rotary plate; 41. Motor connecting rod. Detailed Implementation Example 1

[0019] like Figures 1 to 3 As shown, this utility model proposes a double-helix mixing device for preparing polyurethane resin, comprising a vessel body, a cover body disposed above the vessel body, an inner plate disposed above the interior of the vessel body, and a drive motor disposed on the cover body; the cover body has an opening in the middle, the inner plate has a circular rotating plate in the middle, and the drive motor has a motor connecting rod at its bottom that passes through the opening and is fixed to the rotating plate.

[0020] The inner plate is provided with fixing holes on both sides near the reactor body. Two sets of rotating rods are provided inside the reactor body and fixed to the bottom of the inner plate through the fixing holes. The rotating rods are provided with spiral fan blades for stirring and mixing polyurethane resin raw materials. The inner ring surface of the reactor body is provided with several layers of electric heating rings for heating the mixing raw materials.

[0021] The lid is connected to both sides of the vessel body with L-shaped fixing blocks.

[0022] The heating rings are arranged in a way that they are more concentrated in the middle of the vessel and more sparse on the upper and lower sides.

[0023] The bottom of the vessel is provided with a discharge port.

[0024] Working principle: After the drive motor starts, it drives the circular rotating plate on the inner plate to rotate through the motor connecting rod; the rotation of the rotating plate drives the rotating rod fixed at the bottom of the inner plate and the spiral fan blades on it to rotate synchronously; during the rotation, the spiral fan blades fully stir and shear the polyurethane resin raw materials in the reactor, ensuring uniform mixing of materials; the optimized design of the spiral fan blades makes the mixing process more efficient and reduces the mixing time.

[0025] The heating rings inside the reactor are concentrated in the central area to provide the main heating source; the heating rings on the upper and lower sides are more sparsely distributed to avoid overheating; by precisely controlling the heating power and distribution of the heating rings, the material is ensured to reach the required temperature during the mixing process to promote the chemical reaction; after mixing, the material is discharged through the discharge port at the bottom of the reactor. Example 2

[0026] like Figures 1 to 3 As shown, the main difference between this utility model and Embodiment 1 is that: two arc-shaped, inwardly movable limiting blocks are provided in the middle of the cover body, near the motor connecting rod, and the limiting blocks are provided with slots for fixing the limiting range; the slots are provided with threads, and the two limiting blocks are connected by threads.

[0027] By rotating the limiting block, the limiting block can move inward using the thread inside the slot; when moving inward, the limiting block will contact the edge of the rotating plate; when the limiting block moves inward and contacts the edge of the rotating plate, the rotation angle of the rotating plate is limited to a certain range; this limitation reduces the risk of failure caused by excessive rotation during the mixing process, and improves the reliability and safety of the device.

[0028] Compared with Example 1, this example not only solves the problems of low mixing efficiency and insufficient mixing by setting a double helix mixing mechanism, but also reduces the failure rate of rotating equipment and improves production efficiency by adding a designed limiting device.

[0029] The control method of this utility model is to control it by manually starting and stopping the switch. The wiring diagram of the power element and the power supply are common knowledge in this field. Since this utility model is mainly used to mix polyurethane resin raw materials, the control method and wiring layout will not be explained in detail.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double-helix mixing apparatus for preparing polyurethane resin, comprising a vessel body (1), a cover body (2) disposed above the vessel body (1), an inner plate (3) disposed above the interior of the vessel body (1), and a drive motor (4) disposed on the cover body (2). Its features are, The cover (2) has an opening (22) in the middle, the inner plate (3) has a circular rotating plate (34) in the middle, the drive motor (4) has a motor connecting rod (41) at the bottom and is fixed to the rotating plate (34) through the opening, and the cover (2) has two arc-shaped inwardly movable limiting blocks (23) in the middle, which are close to the motor connecting rod (41). The limiting blocks (23) have slots (24) for fixing the limiting range. The inner plate (3) is provided with fixing holes (32) on both sides near the vessel body. Two sets of rotating rods (31) are provided inside the vessel body (1) and are fixed to the bottom of the inner plate (3) through the fixing holes (32). The rotating rods (31) are provided with spiral fan blades (33) for stirring and mixing polyurethane resin raw materials. The inner ring surface (12) of the vessel body (1) is provided with several layers of electric heating rings (11) for heating the mixed raw materials.

2. The double-helix mixing apparatus for preparing polyurethane resin according to claim 1, characterized in that, The cover (2) is connected to the two sides of the vessel body (1) and is provided with L-shaped fixing blocks (21).

3. The double-helix mixing apparatus for preparing polyurethane resin according to claim 1, characterized in that, The heating rings (11) are arranged in a way that they are more concentrated in the middle of the vessel body (1) and more sparse on the upper and lower sides of the vessel body (1).

4. The twin-helix mixing apparatus for preparing polyurethane resin according to claim 1, characterized in that, The bottom end of the vessel body (1) is provided with a discharge port.

5. The twin-helix mixing apparatus for preparing polyurethane resin according to claim 1, characterized in that, The slot (24) is threaded inside, and the two limiting blocks (23) are connected by the thread.

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