A stirring device for a low-carbon modified liquid quick-setting agent reactor
By introducing an annular turbulence-inducing component into the reactor's stirring device, the material circulation and shearing near the reactor wall are enhanced, solving the problem of uneven mixing and improving reaction efficiency and product stability.
Patent Information
- Application Number
- CN202522506941.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-26
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-26
AI Technical Summary
The existing stirring device for low-carbon modified liquid quick-setting agent reactors has weak shear force near the reactor wall, resulting in uneven mixing of materials, easy stratification or local enrichment, which affects reaction efficiency and product stability.
A stirring device including a main stirring impeller and an annular turbulence assembly was designed. The main stirring impeller is equipped with an inner ring, a radial support arm and an outer ring plate at its end. The bottom of the outer ring plate has an arc-shaped guide skirt to enhance the material disturbance and circulation in the near-wall area. The fluid disturbance capability is improved by the torsional structure of the guide flange.
It significantly improves the mixing uniformity within the reactor, enhances reaction efficiency and product stability, avoids component stratification, and shortens reaction time.
Smart Images
Figure CN224938199U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building material admixture production technology, specifically a stirring device for a low-carbon modified liquid quick-setting agent reactor. Background Technology
[0002] Currently, low-carbon modified liquid accelerators are gradually becoming the mainstream direction of industry development due to their environmental protection, high efficiency, and low or no alkali properties. In the synthesis process of this type of accelerator, the reactor is the core reaction vessel, and the performance of its internal stirring device directly affects the mixing uniformity of the reactants, reaction efficiency, and product stability. Therefore, the rational design of the stirring structure is crucial.
[0003] Existing reactor stirring devices mostly adopt a structure with a central vertical shaft and multiple flat blades or anchor-type stirrers. While this design is effective in processing high-viscosity or easily stratified materials, it has significant shortcomings in the synthesis of low-carbon modified liquid quick-setting agents. Because quick-setting agent raw materials often contain multiple components such as silicates, organic modifiers, and stabilizers, with large differences in density and polarity, local enrichment or sedimentation is likely to occur in the early stage of the reaction. Traditional stirrers have weak shear force near the reactor wall, and fluid circulation is mainly concentrated in the central area, resulting in slow material turnover and uneven mixing near the inner wall of the reactor. This not only prolongs the reaction time but may also affect the stability and consistency of the final product due to local overheating or incomplete reaction. Utility Model Content
[0004] The purpose of this invention is to provide a stirring device for a reactor of low-carbon modified liquid quick-setting agent, in order to solve the problem mentioned in the background art that the current stirring devices for low-carbon modified liquid quick-setting agent have insufficient mixing capacity in the reactor wall area, which leads to the easy stratification or local enrichment of multiphase raw materials, affecting the uniformity of the reaction and the stability of the product.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a stirring device for a reactor of a low-carbon modified liquid quick-setting agent, comprising a reactor body, a drive motor provided on the outer top of the reactor body, a vertically arranged central stirring shaft provided inside the reactor body, a main stirring paddle fixedly installed at the lower end of the central stirring shaft, and a synchronously rotating annular turbulence component provided on the outer circumferential side of the end of the main stirring paddle, the annular turbulence component comprising an inner ring, a radial support arm and an outer ring plate, the inner ring being sleeved on the end of the main stirring paddle, the outer ring plate being located outside the inner ring, the radial support arm being evenly distributed circumferentially between the inner ring and the outer ring plate, and an arc-shaped guide skirt extending downward from the bottom of the outer ring plate.
[0006] Preferably, the inner ring is composed of two symmetrical semi-annular clamping blocks, which are fastened to the outer periphery of the cylindrical section at the end of the main stirring paddle by radial bolts, and the inner wall of the inner ring is provided with an annular positioning boss that cooperates with the groove on the main stirring paddle.
[0007] Preferably, the inner end of the radial support arm is welded to the outer circumference of the inner ring, and the outer end of the radial support arm is inclined upward and fixedly connected to the top of the outer ring plate.
[0008] Preferably, the outer ring plate is an annular thin-walled cylinder, and its lower outer wall is provided with reinforcing ribs along the circumference. The reinforcing ribs are segmented and are made of four segments of hard alloy strips spliced together.
[0009] Preferably, the arc-shaped guide skirt is integrally stamped and extended downward from the bottom edge of the outer ring plate, and its cross-section is concave arc-shaped, and it is curled on the inner side of the free end to form a C-shaped reinforcing edge.
[0010] Preferably, the main stirring impeller has a three-blade structure, with a guide flange at the end of each blade. The guide flange extends along one side of the outer edge of the blade in a twisted shape, and the width of the guide flange gradually decreases from the root to the end.
[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: the stirring device for the low-carbon modified liquid quick-setting agent reactor can effectively enhance material disturbance and circulation in the near-wall region, improve mixing uniformity, avoid component stratification, and improve reaction efficiency and product stability. This device, through the annular turbulence component at the end of the main stirring paddle, combined with the synergistic effect of the inner ring, radial support arm, outer ring plate, and arc-shaped guide skirt, strengthens the downward flow and shear effect near the reactor wall. Simultaneously, the torsional structure of the guide flange further enhances the fluid disturbance capability at the paddle tip, and the overall structure significantly optimizes the flow field distribution within the reactor. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the stirring device structure of a low-carbon modified liquid quick-setting agent reactor according to the present invention. Figure 2 This is a schematic diagram of the annular turbulence component of the stirring device for a low-carbon modified liquid quick-setting agent reactor according to this utility model. Figure 3 This is a schematic diagram of the external structure of the outer ring plate of the stirring device for a low-carbon modified liquid quick-setting agent reactor according to this utility model.
[0013] In the figure: 1. Reactor body; 2. Drive motor; 3. Central stirring shaft; 4. Main stirring paddle; 41. Guide flange; 5. Annular turbulence assembly; 51. Inner ring; 52. Radial support arm; 53. Outer ring plate; 54. Arc-shaped guide skirt; 55. Reinforcing rib ring. Detailed Implementation
[0014] 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.
[0015] Please see Figure 1-3This utility model provides a technical solution: a stirring device for a reactor of a low-carbon modified liquid quick-setting agent, including a reactor body 1, a feed inlet on one side of the top of the reactor body 1, a drive motor 2 on the outside of the top of the reactor body 1, and a vertically arranged central stirring shaft 3 inside the reactor body 1. The drive motor 2 is fixed to the outside of the top end cap of the reactor body 1 through a mounting flange, and its output shaft extends into the reactor body 1 through a sealing assembly and is connected to the upper end of the central stirring shaft 3 through a rigid coupling. A main stirring paddle 4 is fixedly installed at the lower end of the central stirring shaft 3, and a synchronously rotating annular turbulence component 5 is arranged on the outer circumferential side of the end of the main stirring paddle 4. The annular turbulence component 5 includes an inner ring 51, a radial support arm 52, and an outer ring plate 5. 3. The inner ring 51 is fitted onto the end of the main stirring paddle 4, and the outer ring plate 53 is located outside the inner ring 51. Radial support arms 52 are evenly distributed circumferentially between the inner ring 51 and the outer ring plate 53, and the bottom of the outer ring plate 53 has an arc-shaped guide skirt 54 extending downwards. The outer circumferential surface of the outer ring plate 53 maintains a uniform gap with the inner wall of the reactor body 1. This structure drives the motor 2 to rotate the central stirring shaft 3, which in turn drives the main stirring paddle 4 and its end ring turbulence assembly 5 to rotate synchronously. The inner ring 51 rotates stably with the end of the main stirring paddle 4, and transmits power to the outer ring plate 53 through the radial support arms 52, causing it to rotate around the central axis. During rotation, the arc-shaped guide skirt 54 at the bottom of the outer ring plate 53 guides the flow of the air close to the reactor body. The material on the inner wall generates a downward forced flow, while the uniform gap between the outer circumference of the outer ring plate 53 and the reactor wall allows the material to flow continuously between the inner and outer regions, forming a circulating flow field from the center upwards and near the wall downwards. The main stirring paddle 4 further enhances the local vortex disturbance, promoting full shearing and mixing of the material in the radial and axial directions. This makes it difficult for components such as silicates, organic modifiers, and stabilizers with large differences in density and polarity to remain or settle near the reactor wall, significantly accelerating the material renewal rate in the wall area. This effectively solves the problems of uneven mixing, local enrichment, prolonged reaction time, and poor product stability caused by weak shear force and insufficient circulation in the near-wall area of the reactor in the existing technology. The inner ring 51 is composed of two symmetrical semi-annular clamping blocks. Two clamping blocks are radially bolted to the outer circumference of the cylindrical section at the end of the main impeller 4. The inner wall of the inner ring 51 has an annular positioning boss that engages with a groove on the main impeller 4. This structure, by firmly fixing the inner ring 51 to the end of the main impeller 4, combined with the tightening effect of the radial bolts, ensures reliable connection and prevents loosening of the annular turbulence assembly 5 under high-speed rotation. Simultaneously, the annular positioning boss and the groove on the main impeller 4 provide axial limiting and circumferential transmission, effectively preventing displacement of the inner ring 51 under long-term vibration and alternating loads. This ensures stable operation of the radial support arm 52 and the outer ring plate 53, thereby maintaining a continuous and uniform guiding and shearing effect in the near-wall region of the entire turbulence structure, improving the operational stability and service life of the device.The inner end of the radial support arm 52 is welded to the outer circumference of the inner ring 51, and the outer end of the radial support arm 52 is inclined upward and fixedly connected to the top of the outer ring plate 53. This structure forms a stable triangular support structure, which enables the outer ring plate 53 to maintain good axial rigidity and circumferential concentricity when rotating, effectively resisting the vibration and deformation caused by fluid impact, ensuring that the gap between the arc-shaped guide skirt 54 and the inner wall of the reactor body 1 is uniform and stable, and continuously exerting the directional guidance and shearing effect on the near-wall material, thereby ensuring the structural stability and mixing reliability of the annular turbulence assembly 5 under complex working conditions. The outer ring plate 53 is an annular thin-walled cylinder, and its lower outer wall is provided with a reinforcing rib ring 55 along the circumference. The reinforcing rib ring 55 is a segmented structure, which is spliced from four sections of hard alloy strips. The outer ring plate 53, as the main load-bearing part of the annular turbulence assembly 5, bears significant fluid resistance and centrifugal force during rotation. The reinforcing ribs 55 effectively improve the structural rigidity and deformation resistance of the outer ring plate 53, preventing cylinder instability or torsion due to long-term stress. The segmented, spliced hard alloy strips not only facilitate installation and replacement but also significantly enhance the wear resistance of the lower edge of the outer ring plate 53, resisting scouring and wear from materials flowing at high speeds near the wall, thus extending the overall service life of the annular turbulence assembly 5. The arc-shaped guide skirt 54 is integrally stamped and extended downwards from the bottom edge of the outer ring plate 53, with a concave arc cross-section and a C-shaped reinforcing edge formed by curling the inner side of the free end. This arc-shaped guide skirt 54, during rotation... It can effectively guide the material in the near-wall area to flow downwards, forming a strong local shear force, breaking the stagnant layer of material near the inner wall of the reactor body 1, promoting rapid material renewal and uniform mixing, thereby further optimizing the fluid flow path, reducing turbulence and energy loss, and ensuring stable guidance and efficient circulation of the fluid near the reactor wall. This allows the material in the reactor body 1 to achieve a more uniform distribution and thorough mixing throughout the entire volume. The main stirring paddle 4 has a three-blade structure, with a guide flange 41 at the end of each blade. The guide flange 41 extends along one side of the outer edge of the blade in a twisted shape, and the width of the guide flange 41 gradually decreases from the root to the end. The guide flange 41 is made of stainless steel sheet bent into shape by a mold and then welded by fillet welding. Fixed to the outer edge of the blades of the main impeller 4, this structure, with its three blades and guide flange 41, creates a non-uniform fluid pressure distribution in the outer edge region of the blades during rotation, generating local eddies and radial disturbances. The guide flange 41 generates a propulsion effect during movement, enhancing the material transport capacity from the center to the vessel wall. Its root structure optimizes the flow field gradient, reduces flow resistance, avoids concentrated energy loss, and guides the fluid to smoothly transition to the action area of the annular turbulence component 5. This effectively improves the synergistic mixing efficiency between the main impeller 4 and the turbulence structure, significantly enhancing the shearing and dispersion capabilities for high-viscosity or multiphase materials, preventing component accumulation or the formation of low-speed dead zones at the blade tips, thereby further improving overall mixing uniformity.
[0016] Working principle: When using the stirring device of the reactor for the low-carbon modified liquid quick-setting agent, first start the drive motor 2. Its output shaft drives the central stirring shaft 3 to rotate vertically inside the reactor body 1 through a rigid coupling. The lower end of the central stirring shaft 3 drives the main stirring paddle 4 to rotate synchronously. The guide flange 41 at the end of the three blades of the main stirring paddle 4 rotates with the paddle blades. At the same time, the inner ring 51 of the annular turbulence assembly 5 rotates synchronously with it. The inner ring 51 transmits the rotational motion to the outer ring plate 53 through the radial support arm 52, so that the outer ring plate 53 rotates as a whole. As the central axis rotates, the arc-shaped guide skirt 54 connected to the bottom of the outer ring plate 53 rotates synchronously. The reinforcing rib ring 55 on the outer periphery of the outer ring plate 53 rotates together with the outer ring plate 53. The entire annular turbulence assembly 5 moves synchronously with the main stirring paddle 4. The material flows inside the reactor body 1 under the push of the main stirring paddle 4. At the same time, guided by the arc-shaped guide skirt 54 and the outer ring plate 53, it flows downward in the near-wall area. The material continues to move in a circulation path that rises in the central area and falls in the near-wall area, thereby completing a series of tasks.
[0017] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A stirring device for a reactor of a low-carbon modified liquid quick-setting agent, comprising a reactor body (1), wherein a drive motor (2) is provided on the outside of the top of the reactor body (1), and a vertically arranged central stirring shaft (3) is provided inside the reactor body (1), characterized in that: The lower end of the central stirring shaft (3) is fixedly installed with a main stirring paddle (4). The end of the main stirring paddle (4) is provided with a synchronously rotating annular turbulence assembly (5) on the outer circumferential side. The annular turbulence assembly (5) includes an inner ring (51), a radial support arm (52), and an outer ring plate (53). The inner ring (51) is sleeved on the end of the main stirring paddle (4). The outer ring plate (53) is located outside the inner ring (51). The radial support arm (52) is evenly distributed circumferentially between the inner ring (51) and the outer ring plate (53). The bottom of the outer ring plate (53) extends downward with an arc-shaped guide skirt (54).
2. The stirring device for a low-carbon modified liquid quick-setting agent reactor according to claim 1, characterized in that: The inner ring (51) is composed of two symmetrical semi-annular clamping blocks. The two clamping blocks are fastened to the outer periphery of the cylindrical section at the end of the main stirring paddle (4) by radial bolts. The inner wall of the inner ring (51) is provided with an annular positioning boss, which cooperates with the groove on the main stirring paddle (4).
3. The stirring device for a low-carbon modified liquid quick-setting agent reactor according to claim 1, characterized in that: The inner end of the radial support arm (52) is welded to the outer circumference of the inner ring (51), and the outer end of the radial support arm (52) is inclined upward and fixedly connected to the top of the outer ring plate (53).
4. The stirring device for a low-carbon modified liquid quick-setting agent reactor according to claim 1, characterized in that: The outer ring plate (53) is an annular thin-walled cylinder, and its lower outer wall is provided with a reinforcing rib ring (55) along the circumference. The reinforcing rib ring (55) is a segmented structure, which is spliced together by four sections of hard alloy strips.
5. The stirring device for a low-carbon modified liquid quick-setting agent reactor according to claim 1, characterized in that: The arc-shaped guide skirt (54) is integrally stamped and extended downward from the bottom edge of the outer ring plate (53), and its cross-section is concave arc-shaped, and it is curled on the inner side of the free end to form a C-shaped reinforcing edge.
6. The stirring device for a low-carbon modified liquid quick-setting agent reactor according to claim 1, characterized in that: The main stirring paddle (4) has a three-blade structure, and each blade has a guide flange (41) at its end. The guide flange (41) extends along one side of the outer edge of the blade and is twisted. The width of the guide flange (41) gradually decreases from the root to the end.