Low-alkali modified liquid accelerator production mixing device

Abstract

The utility model discloses a low alkali modified liquid accelerator production mixing device, including mixing kettle body, the inside of mixing kettle body is equipped with by a plurality of arc shape inner lining board splicing constitutes annular lining structure, detachable connection is passed through buckle subassembly between adjacent of inner lining board, and the inner surface of inner lining board is equipped with helical flow guide structure, the helical flow guide structure includes the inclined boss rib of arranging along arc extension direction and the corrugated flow guide piece of staggered setting between adjacent inclined boss rib, and the inside bottom end of mixing kettle body still is equipped with annular support seat. This low alkali modified liquid accelerator production mixing device has effectively improved the flow state of material in the kettle, has improved mixing uniformity and production stability, is convenient for dismounting and cleaning and maintenance simultaneously, has prolonged the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of admixture production technology, specifically to a mixing device for producing low-alkali modified liquid quick-setting agent. Background Technology

[0002] Low-alkali modified liquid accelerators, as key admixtures in shotcrete, are widely used in the construction industry. Their main function is to promote the rapid setting and hardening of cement paste, thereby improving construction efficiency and early structural strength. With the development of green building materials and durable concrete technology, higher requirements have been placed on the alkali content, stability, and reaction uniformity of accelerators, driving the large-scale production of low-alkali liquid accelerators.

[0003] In the existing production process of liquid accelerators, the mixing device mostly adopts a reaction vessel or mixing vessel with a single inner wall structure. During the mixing, reaction and maturation process, the material is prone to local retention or adhesion on the inner wall of the vessel. Especially when running for a long time or when high viscosity components are involved in the reaction, the residue will locally solidify under high temperature or chemical action. This not only affects the purity and performance consistency of subsequent batches of products, but also increases the difficulty of cleaning and downtime maintenance time. At the same time, the smooth inner wall surface of the traditional vessel lacks effective guidance for the fluid flow path. When there are large differences in material density or when modified components are added, stratification or short-circuit flow is easily formed, resulting in a decrease in mixing uniformity, which in turn affects the stability and coagulation effect of the accelerator. Utility Model Content

[0004] The purpose of this invention is to provide a mixing device for the production of low-alkali modified liquid quick-setting agents, in order to solve the problems mentioned in the background art, such as the simple inner wall structure and lack of flow guidance of current low-alkali modified liquid quick-setting agent production mixing devices, which cause materials to easily stagnate and adhere to the inner wall of the vessel, resulting in uneven mixing and thus affecting the uniformity, stability and cleaning and maintenance efficiency of the product.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mixing device for producing a low-alkali modified liquid quick-setting agent, comprising a mixing vessel, wherein the interior of the mixing vessel is provided with an annular lining structure composed of multiple arc-shaped inner lining plates spliced ​​together, the inner lining plates being detachably connected to each other by a snap-fit ​​assembly, and the inner surface of the inner lining plate being provided with a spiral flow guiding structure, the spiral flow guiding structure including inclined ribs arranged along the arc-shaped extension direction and corrugated flow guiding plates staggered between adjacent inclined ribs, and an annular support seat is also provided at the bottom of the mixing vessel for providing radial support to the inner lining plate.

[0006] Preferably, the buckle assembly includes a snap-fit ​​part and a snap-fit ​​groove disposed at the ends of adjacent inner lining plates, wherein the snap-fit ​​part and the snap-fit ​​groove are interlocked and have matching structural shapes.

[0007] Preferably, the inclined ribs are evenly distributed, with an inclination angle of 30°-60°, and the cross-section of the inclined ribs is trapezoidal with a height of 5mm and a spacing of 15mm between adjacent ribs.

[0008] Preferably, the corrugated guide vane is a periodically undulating sawtooth-shaped thin sheet structure, with its crests connected to the bottom of the inclined ribs and its troughs facing downstream in the flow direction.

[0009] Preferably, the top of the annular support seat is provided with an annular groove on the side near the inner wall of the mixing vessel, and the inner wall at the bottom of the inner liner is provided with a positioning boss.

[0010] Preferably, the inner wall of the annular support is integrally formed with an arc-shaped concave surface that is recessed toward the central axis. The arc-shaped concave surface has a continuous and smooth bowl-shaped inward-shrinking structure, which is recessed from the top to the middle along the axial direction and then smoothly transitions to the bottom to form a through annular cavity.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: This low-alkali modified liquid quick-setting agent production mixing device effectively improves the flow state of materials in the reactor, reduces wall stagnation and mixing dead zones, improves mixing uniformity and production stability, and facilitates disassembly, cleaning, and maintenance, thus extending the service life of the equipment. The device achieves rapid disassembly and partial replacement of internal wall functional modules through the design of the inner liner splicing structure and snap-fit ​​components. The spiral flow guiding structure composed of inclined ribs and corrugated guide vanes enhances the fluid shearing and mixing effect. The radial support of the inner liner by the annular support seat ensures the long-term operational stability of the structure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a mixing device for producing a low-alkali modified liquid quick-setting agent according to this utility model. Figure 2 This is a top view of the internal structure of the mixing vessel of a mixing device for producing a low-alkali modified liquid quick-setting agent according to this utility model. Figure 3 This is a top view of the annular support base of a mixing device for producing a low-alkali modified liquid quick-setting agent according to this utility model. Figure 4 This is a schematic diagram of the inner lining plate structure of a mixing device for producing a low-alkali modified liquid quick-setting agent according to this utility model.

[0013] In the figure: 1. Mixing vessel body; 2. Inner liner plate; 3. Snap-fit ​​assembly; 31. Snap-fit ​​part; 32. Snap-fit ​​groove; 4. Spiral guide structure; 41. Inclined rib; 42. Corrugated guide vane; 5. Annular support seat; 51. Annular groove; 6. Positioning boss. 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 1-4This utility model provides a technical solution: a mixing device for producing a low-alkali modified liquid quick-setting agent, including a mixing vessel 1, a top cover with a sealing cap having an inlet, and a bottom outlet. The mixing vessel 1 has an internal annular lining structure composed of multiple arc-shaped inner lining plates 2. The inner lining plates 2 are detachably connected by a snap-fit ​​assembly 3. The inner surface of the inner lining plates 2 has a spiral guide structure 4, which includes inclined ribs 41 arranged along the arc-shaped extension direction and corrugated guide vanes 42 staggered between adjacent inclined ribs 41. Furthermore, the bottom of the mixing vessel 1 has an annular support seat 5 for providing radial support to the inner lining plates 2. Screws evenly distributed circumferentially are fixed to the lower part of the inner wall of the mixing vessel 1, forming a stable support base. When the mixing vessel 1 is mixed with the materials added to it by the stirring mechanism, the materials generate overall circulation flow under the stirring action. At this time, the annular inner lining structure composed of multiple arc-shaped inner lining plates 2 plays a role. The inclined ribs 41 of the spiral guide structure 4 form a continuous oblique guide channel for the flowing materials, guiding the fluid to rise or fall along the inner wall in a spiral trajectory, effectively breaking the laminar flow boundary and suppressing the formation of short-circuit flow and dead zones. At the same time, the corrugated guide vanes 42 generate periodic disturbances in the flow direction, enhancing the shear effect and micro-mixing, preventing stratification caused by differences in component density, and adjacent inner lining plates 2 are connected by a snap-fit ​​assembly 3. This device enables rapid plug-in fixing, ensuring both sealing and structural stability under dynamic operating conditions, preventing misalignment or detachment due to vibration. The annular support 5 provides continuous radial support to the bottom area of ​​the inner liner 2, preventing deformation or sinking during long-term operation and maintaining the geometric consistency of the inner wall flow channels. This significantly reduces the risk of material retention and adhesion on the inner wall of the reactor, especially reducing the accumulation and solidification tendency of highly active or high-viscosity components in dead corners. This effectively solves the problems of poor mixing uniformity, insufficient batch stability, difficult cleaning and maintenance, and short equipment lifespan caused by the simple structure of the inner wall of the reactor and lack of effective flow guidance in existing technologies. The snap-fit ​​assembly 3 includes snap-fit ​​parts 31 located at the ends of adjacent inner liner plates 2. The locking part 31 and the locking groove 32 are interlocked and matched in shape. The mating surfaces of the locking part 31 and the locking groove 32 are provided with elastic sealing strips to enhance the sealing of the joint and reduce material seepage into the gaps. When adjacent inner liner plates 2 are installed and spliced ​​inside the mixing vessel 1, the locking part 31 at the end of one inner liner plate 2 is aligned with the locking groove 32 at the end of the other inner liner plate 2 and pushed in radially or axially to achieve a quick interlocking fit. Since the structural shapes of the locking part 31 and the locking groove 32 match, a tight connection can be formed without additional fasteners, effectively transmitting shear force and limiting the relative displacement between adjacent plates. During the stirring process, it resists the alternating stress generated by the material flow and prevents the connection from loosening or misaligning.Meanwhile, this snap-fit ​​connection method facilitates reverse disassembly during downtime maintenance, enabling quick replacement or cleaning of individual inner liner plates 2 without the need for complete disassembly of the inner liner structure. This significantly improves equipment maintenance efficiency and operational flexibility. The inclined ribs 41 are evenly distributed with an inclination angle of 30°-60°. The cross-section of each inclined rib 41 is trapezoidal, with a height of 5mm and a spacing of 15mm between adjacent ribs. This structure creates orderly flow channels, forcing the fluid to undergo spiral motion and enhancing the shear effect. This effectively breaks down concentration gradients and density stratification, improving the fusion efficiency between different components. The trapezoidal cross-section optimizes the fluid flow surface while ensuring structural rigidity, reducing... The formation of vortex dead zones allows materials to fully penetrate and tumble between the inclined ribs 41, thereby improving the mixing effect. The corrugated guide vane 42 is integrally molded and fixed to the surface of the inner liner 2. The corrugated guide vane 42 has a periodically undulating sawtooth-shaped thin sheet structure, with its crests connected to the bottom of the inclined ribs 41 and its troughs facing downstream in the flow direction. This sawtooth-shaped undulating structure of the corrugated guide vane 42 forms a periodically changing flow channel cross-section between the inclined ribs 41. The fluid velocity increases when passing through the crests, and local low-pressure backflow is generated when entering the trough region, exciting microscale vortices, further disturbing the flow field boundary layer, enhancing the mixing between adjacent fluid layers, and thus effectively improving the mixing effect. To improve mixing uniformity, the top of the annular support 5 is provided with an annular groove 51 on the side near the inner wall of the mixing vessel 1, and the inner wall of the bottom end of the liner plate 2 is provided with a positioning boss 6. This structure allows the bottom end of the liner plate 2 to be embedded in the annular groove 51, with the bottom of the positioning boss 6 supported on the top surface of the annular support 5, achieving dual positioning of the liner plate 2 in both radial and axial directions. This ensures the stability of the assembled annular liner structure during mixing. This design also facilitates quick alignment during installation, improving assembly efficiency, and allows for the overall or segmented disassembly of the liner plate 2 during maintenance, significantly enhancing the structural reliability and maintenance convenience of the equipment. The inner wall of the annular support 5 is integrally formed with a recess towards the central axis. The arc-shaped concave surface has a continuous, smooth, bowl-shaped inward-curving structure. It curves downwards from the top to the middle along the axial direction and smoothly transitions to the bottom, forming a continuous annular cavity. When the material inside the mixing vessel 1 flows along the inner wall of the annular support 5 under stirring, the bowl-shaped inward-curving structure of the arc-shaped concave surface dynamically guides the fluid, causing the material in the near-wall area to deflect towards the central axis and form an upward backflow. This effectively eliminates the bottom stagnation zone and sedimentation dead zones that are prone to occur in traditional support structures. The continuous, smooth transition surface avoids energy loss and eddy separation caused by abrupt changes in the flow field, allowing the material to achieve a gentle turning and uniform distribution within the annular cavity until discharge.

[0016] Working Principle: When using this low-alkali modified liquid quick-setting agent production mixing device, the required components are first added to the mixing vessel 1 through the feed inlet on the sealed cover. Then, the stirring mechanism is activated to mix the materials. Under the stirring action, the materials circulate within the mixing vessel 1, flowing through the inner surface of the annular lining structure formed by multiple arc-shaped inner lining plates 2. During the flow, the materials sequentially pass through the inclined guide channels formed by the inclined ribs 41 and the periodically undulating flow channels formed by the corrugated guide plates 42, continuing to flow downwards to the bottom area of ​​the mixing vessel 1. The positioning boss 6 at the bottom of the inner lining plate 2 cooperates with the annular groove 51 at the top of the annular support seat 5, ensuring the inner lining plate 2 is stably positioned. The materials circulate within the vessel. Guided by the arc-shaped concave surface of the inner wall of the support seat 5, the liquid smoothly turns and flows upward along the bowl-shaped inward structure, forming an overall circulation. After mixing, the discharge port at the bottom of the mixing vessel 1 is opened to discharge the uniformly mixed liquid quick-setting agent out of the vessel. During equipment maintenance or replacement, the sealing cover can be removed first, and the inner liner 2 can be lifted off the ring support seat 5 piece by piece. The insertion and engagement of the snap-fit ​​part 31 and the slot 32 in the snap-fit ​​assembly 3 can be released to realize the segmented removal of the inner liner 2. After inspection, cleaning or replacement, the inner liner 2 can be inserted and spliced ​​in reverse order through the snap-fit ​​part 31 and the slot 32, and the bottom positioning boss 6 can be embedded into the edge of the top of the ring groove 51. Finally, the reassembly of the device is completed, thus 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 low-alkali modified liquid accelerator production mixing device, comprising a mixing kettle body (1), characterized in that: The mixing vessel (1) has an annular lining structure inside, which is composed of multiple arc-shaped inner lining plates (2). The inner lining plates (2) are detachably connected to each other by a snap-fit ​​assembly (3). The inner surface of the inner lining plate (2) is provided with a spiral flow guide structure (4). The spiral flow guide structure (4) includes inclined ribs (41) arranged along the arc extension direction and corrugated flow guide plates (42) staggered between adjacent inclined ribs (41). The bottom of the mixing vessel (1) is also provided with an annular support seat (5) to provide radial support for the inner lining plate (2).

2. A low alkali modified liquid accelerant production mixing device according to claim 1, characterized in that: The buckle assembly (3) includes a snap-fit ​​part (31) and a snap-fit ​​groove (32) disposed at the ends of adjacent inner lining plates (2). The snap-fit ​​part (31) and the snap-fit ​​groove (32) are interlocked and matched in shape.

3. The mixing device for producing a low-alkali modified liquid quick-setting agent according to claim 1, characterized in that: The inclined ribs (41) are evenly distributed, with an inclination angle of 30°-60°, and the cross section of the inclined ribs (41) is trapezoidal with a height of 5mm and a spacing of 15mm between adjacent ribs.

4. The mixing device for producing a low-alkali modified liquid quick-setting agent according to claim 1, characterized in that: The corrugated guide vane (42) is a periodically undulating sawtooth-shaped thin sheet structure, with its crests connected to the bottom of the inclined ribs (41) and its troughs facing downstream of the flow direction.

5. The mixing device for producing a low-alkali modified liquid quick-setting agent according to claim 1, characterized in that: The top of the annular support (5) is provided with an annular groove (51) on the side near the inner wall of the mixing vessel (1), and the inner wall at the bottom of the inner liner (2) is provided with a positioning boss (6).

6. The mixing device for producing a low-alkali modified liquid quick-setting agent according to claim 1, characterized in that: The inner wall of the annular support (5) is integrally formed with an arc-shaped concave surface that is recessed toward the central axis. The arc-shaped concave surface has a continuous and smooth bowl-shaped inward shrinkage structure. It is recessed from the top to the middle along the axial direction and then smoothly transitions to the bottom to form a through annular cavity.

Images