Polycarboxylate superplasticizer pre-reactor

Abstract

The utility model relates to a polycarboxylate superplasticizer pre-reactor, and belongs to the technical field of polycarboxylate superplasticizer production. The device mainly comprises a base, a supporting frame, a roller sleeve, a roller and a driving assembly, the supporting frame is installed on the base, the roller sleeve is hinged to the supporting frame, arc-shaped blocks are symmetrically arranged on the top of the roller sleeve, the two arc-shaped blocks are connected through a connecting column, a rotating motor is installed on the outer wall of the roller sleeve, and a driving gear disc is arranged at the output end of the rotating motor. The roller is rotatably installed in the roller sleeve through a bearing, a driven gear disc is arranged on the periphery of the roller, the two gear discs are in meshing transmission, a sealing cover is arranged on the top of the roller, the driving assembly is installed on the supporting frame and comprises a driving motor, a rotating disc and a sliding piece, and the driving motor is installed on the top of the supporting beam. The rotating shaft output end of the driving motor penetrates through the lower end of the supporting frame; according to the utility model, reactants in the reactor can be fully and uniformly mixed, so that the pre-reaction efficiency and quality are improved.

Description

Technical Field

[0001] This utility model belongs to the field of polycarboxylate superplasticizer production technology, specifically relating to a polycarboxylate superplasticizer pre-reactor. Background Technology

[0002] Water-reducing agents are admixtures that can reduce the amount of mixing water and increase the strength of concrete while keeping the workability and cement content unchanged, or save cement content while keeping the workability and strength unchanged. Polycarboxylate superplasticizer is a high-performance water-reducing agent that is widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects. When preparing polycarboxylate superplasticizer, the reactants are usually pre-treated to promote a more efficient copolymerization reaction.

[0003] Polycarboxylate superplasticizers are typically prepared via free radical polymerization. In this process, the pre-reaction stage plays a crucial role in controlling the mixing uniformity of the reactants, the reaction rate, and the molecular structure and properties of the product. Existing pre-reaction equipment for polycarboxylate superplasticizers has certain limitations in practical applications. Some traditional pre-reactors employ a simple stirred tank structure with an unreasonable shape and layout of the stirring blades, leading to uneven mixing of reactants during the pre-reaction process. This is particularly problematic for materials such as monomers and initiators with varying viscosities and densities required for polycarboxylate superplasticizer synthesis, making rapid and thorough dispersion and mixing difficult. This affects the efficiency and quality of the pre-reaction, consequently negatively impacting the subsequent main reaction and the performance of the final superplasticizer product. Summary of the Invention

[0004] To overcome the problem that the unreasonable form and layout of the stirring blades in traditional pre-reactors in the background technology leads to uneven mixing of reactants during the pre-reaction process, thereby affecting the efficiency and quality of the pre-reaction, and consequently adversely affecting the subsequent main reaction and the performance of the final water-reducing agent product, this utility model provides a polycarboxylate water-reducing agent pre-reactor that can fully mix the reactants in the reactor, thereby improving the efficiency and quality of the pre-reaction.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A pre-reactor for polycarboxylate superplasticizer mainly includes a base, a support frame, a roller sleeve, a roller, and a drive assembly. The support frame is installed on the base, and the roller sleeve is hinged to the support frame. The top of the roller sleeve is symmetrically provided with arc-shaped blocks, and the two arc-shaped blocks are connected by a connecting column. A rotary motor is installed on the outer wall of the roller sleeve, and the output end of the rotary motor is provided with a drive gear disk. The roller is rotatably installed inside the roller sleeve through bearings, and a driven gear disk is provided on the outer circumference of the roller. The two gear disks mesh and drive each other. A sealing cover is provided on the top of the roller. The drive assembly is installed on the support frame and includes a drive motor, a rotating disk, and a sliding member. The drive motor is installed on the top of the support beam, and the output end of the drive motor shaft passes through to the lower end of the support frame and connects to the rotating disk. One end of the sliding member is installed on the rotating disk, and the other end is slidably installed on the connecting column. The sliding member reciprocates on the connecting column as the rotating disk rotates.

[0006] Furthermore, the drum is equipped with an agitator, which includes a column and agitator blades. The column is fixedly installed at the bottom of the drum, and the agitator blades are installed on the column and distributed radially along the column.

[0007] Furthermore, a filter screen is attached to the top of the roller via Velcro.

[0008] Furthermore, a heater is provided on the inner wall of the roller sleeve, and the heaters are distributed in a ring along the inner wall.

[0009] The beneficial effects of this utility model are:

[0010] This invention utilizes the synergistic effect of gear meshing and reciprocating sliding to drive the drum to generate axial displacement while rotating, forming a three-dimensional mixing trajectory. This structural design significantly improves material contact efficiency, resulting in more uniform raw material dispersion, and is particularly suitable for the pre-reaction process of viscous materials. The counter-movement of the drum sleeve and the drum generates shear force, which, combined with the periodic impact of the sliding parts on the connecting column, effectively breaks up initial agglomerates in the raw materials. This invention solves the problem that the unreasonable form and layout of the stirring blades in traditional pre-reactors leads to uneven mixing of reactants during the pre-reaction process, thus affecting the efficiency and quality of the pre-reaction, and consequently adversely affecting the subsequent main reaction and the performance of the final water-reducing agent product. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0012] Figure 2 This is an isometric view of the present invention;

[0013] Figure 3 This is a schematic diagram of the internal structure of the drum of this utility model.

[0014] In the diagram: 1. Base; 2. Support frame; 3. Roller sleeve; 4. Roller; 5. Drive assembly; 501. Drive motor; 502. Rotating disc; 503. Sliding component; 6. Agitator; 601. Column; 602. Agitator blade; 7. Connecting column; 8. Rotary motor; 9. Drive gear disc; 10. Driven gear disc; 11. Sealing cover; 12. Filter screen. Detailed Implementation

[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0016] This utility model discloses a pre-reactor for polycarboxylate superplasticizer. The pre-reactor mainly includes a base 1, a support frame 2, a roller sleeve 3, a roller 4, and a drive assembly 5. The support frame 2 is mounted on the base 1. The roller sleeve 3 is hinged to the support frame 2. Symmetrical arc-shaped blocks are provided on the top of the roller sleeve 3, and the two arc-shaped blocks are connected by connecting columns 7. A rotary motor 8 is mounted on the outer wall of the roller sleeve 3, and a drive gear disk 9 is provided at the output end of the rotary motor 8. The roller 4 is rotatably mounted inside the roller sleeve 3 via bearings. A driven gear disk 10 is provided on the outer circumference of the roller 4, and the two gear disks mesh for transmission. A sealing cover 11 is provided on the top of the roller 4. The drive assembly 5 is mounted on the support frame 2 and includes a drive motor 501, a rotating disk 502, and a sliding mechanism. The moving part 503 and the drive motor 501 are mounted on the top of the support beam. The output end of the drive motor 501 shaft passes through to the lower end of the support frame 2 and connects to the rotating disk 502. One end of the sliding part 503 is mounted on the rotating disk 502, and the other end is slidably mounted on the connecting column 7. The sliding part 503 reciprocates on the connecting column 7 as the rotating disk 502 rotates. Through the synergistic effect of gear meshing transmission and reciprocating sliding, the device drives the drum 4 to generate axial displacement while rotating, forming a three-dimensional mixing trajectory. This structural design significantly improves the material contact efficiency and makes the raw materials disperse more evenly, which is especially suitable for the pre-reaction process of viscous materials. The reverse movement of the drum 4 sleeve 3 and the drum 4 generates shearing force, which, together with the periodic impact of the sliding part 503 on the connecting column 7, can effectively break up the initial agglomerates in the raw materials.

[0017] The drum 4 is equipped with a stirrer 6, which includes a column 601 and stirring blades 602. The column 601 is fixedly installed at the bottom of the drum 4, and the stirring blades 602 are installed on the column 601 and distributed radially along the column 601. When the radially distributed stirring blades 602 rotate with the drum 4, they form a bidirectional shear flow field with the swing of the drum 4 sleeve 3, which can overcome the vortex limitation of single rotation stirring and improve the material dispersion efficiency.

[0018] The top of the roller 4 is fitted with a filter screen 12 via Velcro; the filter screen 12 installed on the top of the roller 4 via Velcro can initially intercept clumps in the input material, preventing large particles from directly entering the reaction zone.

[0019] The inner wall of the roller sleeve 3 is equipped with a heater, which is distributed in a ring along the inner wall; the ring-distributed heater provides uniform heating, improves reaction efficiency, prevents local agglomeration, and reduces energy consumption.

[0020] Work process:

[0021] In practical use, the sealing cover 11 is opened, and the material is poured into the drum 4. The filter screen 12 at the top of the drum 4 will initially intercept the lumps in the material. Then, the sealing cover 11 is closed, and the drive motor 501 and the rotary motor 8 are started. The drive motor 501 drives the rotating disk to rotate, so that the sliding part 503 moves with the circumference of the rotating disk and then slides back and forth along the axial direction of the connecting column 7. The rotary motor 8 drives the drive gear disk 9 to rotate. Through gear meshing transmission (drive gear disk 9 and driven gear disk 10 on the drum 4), the drum 4 is driven to rotate in the drum sleeve 3, forming a basic stirring effect. The stirrer 6 inside the drum 4 can overcome the vortex limitation of single rotation stirring, thus improving the material dispersion efficiency. This utility model solves the problem that the form and layout of the stirring blades of the traditional pre-reactor are unreasonable, which leads to uneven mixing of reactants in the pre-reaction process, thereby affecting the efficiency and quality of the pre-reaction, and thus adversely affecting the subsequent main reaction and the performance of the final water-reducing agent product.

[0022] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A pre-reactor for polycarboxylate superplasticizer, characterized in that: The aforementioned polycarboxylate superplasticizer prereactor includes a base (1), a support frame (2), a roller sleeve (3), a roller (4), and a drive assembly (5). The support frame (2) is mounted on the base (1), and the roller sleeve (3) is hinged to the support frame (2). The top of the roller sleeve (3) is symmetrically provided with arc-shaped blocks, and the two arc-shaped blocks are connected by a connecting column (7). A rotary motor (8) is installed on the outer wall of the roller sleeve (3), and the output end of the rotary motor (8) is provided with a drive gear disk (9). The roller (4) is rotatably mounted inside the roller sleeve (3) through bearings, and a driven gear disk (10) is provided on the outer periphery of the roller (4). The disc meshing transmission is provided with a sealing cover (11) on the top of the roller (4). The drive assembly (5) is installed on the support frame (2). The drive assembly (5) includes a drive motor (501), a rotating disk (502), and a sliding member (503). The drive motor (501) is installed on the top of the support frame (2). The output end of the drive motor (501) shaft passes through to the lower end of the support frame (2) and connects to the rotating disk (502). One end of the sliding member (503) is installed on the rotating disk (502), and the other end is slidably installed on the connecting column (7). The sliding member (503) slides back and forth on the connecting column (7) as the rotating disk (502) rotates.

2. The polycarboxylate superplasticizer pre-reactor of claim 1, wherein: The drum (4) is equipped with a stirrer (6), which includes a column (601) and stirring blades (602). The column (601) is fixedly installed at the bottom of the drum (4), and the stirring blades (602) are installed on the column (601) and distributed radially along the column (601).

3. The polycarboxylate superplasticizer pre-reactor of claim 1, wherein: The top of the roller (4) is fitted with a filter screen (12) via Velcro.

4. The polycarboxylate superplasticizer pre-reactor of claim 1, wherein: The inner wall of the roller sleeve (3) is provided with a heater, which is distributed in a ring along the inner wall.

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