Anti-condensation concrete nozzle
By using multiple sets of parallel mixing components, a counter-rotating mixing shaft, and a concrete nozzle with a three-dimensional shear surface design, the problem of easy caking in traditional nozzles is solved, achieving efficient mixing and homogenization, and improving construction efficiency and project quality.
Patent Information
- Application Number
- CN202520428418.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Traditional concrete nozzles are prone to caking, which affects construction efficiency and project quality.
It adopts a three-dimensional shear surface design with multiple sets of parallel stirring components, counter-rotating stirring shafts, ball-spiral composite stirring rods, and staggered stirring rods. Combined with a closed-loop controlled variable frequency motor system and wear-resistant layer, it achieves efficient stirring and homogenization.
It effectively inhibits concrete setting, maintains good fluidity and stability, ensures higher levels of project quality, reduces equipment maintenance costs, and improves energy efficiency.
Smart Images
Figure CN223945878U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to concrete injection equipment technical field, concretely relates to a kind of anti-settling concrete nozzle structure with multi-stage mixing function, it is applicable to wet concrete construction scene. BACKGROUND
[0002] In the field of construction, concrete injection operation is a very common but crucial link, and the traditional concrete nozzle, as a key tool, has been playing an indispensable role. However, it is necessary to face the fact that the traditional concrete nozzle has exposed a rather thorny problem in actual use, that is, it is prone to concrete setting phenomenon.
[0003] Specifically, when concrete is injected through the traditional nozzle, due to the combined influence of various factors, such as the structural design of the nozzle, the characteristics of the concrete itself, and the environmental conditions of the construction site, etc., part of the concrete will gradually adhere and accumulate on the inner wall of the nozzle. With the passage of time and the continuous progress of the injection operation, the adhered concrete will slowly set.
[0004] The negative effects of this setting phenomenon cannot be underestimated. On the one hand, it greatly affects the construction efficiency. Once the concrete inside the nozzle sets, it will hinder the smoothness of the concrete injection, reduce the injection speed, and even cause blockage, thereby forcing the construction process to be interrupted, requiring additional time and manpower to clean and dredge the nozzle, which seriously delays the overall construction progress. On the other hand, this phenomenon also poses a potential threat to the quality of the project. Uneven injection and intermittent injection caused by setting and blockage will make the distribution of concrete on the construction surface uneven, thereby affecting the integrity and stability of the concrete structure and reducing the quality standard of the project.
[0005] In view of the series of adverse consequences caused by the setting phenomenon of the traditional concrete nozzle, it is an important task for the industry to improve it. INVENTION CONTENTS
[0006] Therefore, the utility model provides a concrete nozzle that prevents setting, which efficiently mixes and homogenizes concrete from multiple levels and angles, continuously maintains the good fluidity and stability of the concrete, effectively slows down the chemical reaction inside the concrete, greatly reduces the possibility of concrete setting, provides more reliable protection for the concrete construction process, and ensures that the project quality reaches a higher level.
[0007] The purpose of the utility model is achieved through the following technical solutions:
[0008] The application discloses an anti-condensation concrete nozzle, which comprises a shell and at least two groups of stirring assemblies, wherein the shell is sequentially provided with an inlet end, at least two stages of tapered chambers and an outlet end along a material flow direction; the at least two groups of stirring assemblies are correspondingly arranged in the respective tapered chambers; each group of stirring assemblies comprises a stirring shaft, a stirring rod group and a driving mechanism; the stirring shaft is connected with the shell through rotary support structures at both ends; the stirring rod group is composed of a plurality of stirring rods which are uniformly distributed in the circumferential direction of the stirring shaft; the driving mechanism is connected with the stirring shaft through a transmission assembly; wherein the stirring shafts of the adjacent stirring assemblies are parallel to each other and rotate in opposite directions; the overhanging end of each stirring rod is provided with a ball-spiral composite structure which is composed of an end ball and a spiral blade extending in the axial direction of the stirring rod; the stirring rods of the adjacent stirring assemblies are arranged in a staggered manner in the axial direction, and the rotation direction of the spiral blade is adapted to the rotation direction of the corresponding stirring shaft.
[0009] Firstly, regarding the arrangement of parallel stirring assemblies. By arranging two or more groups of parallel stirring assemblies, the action range and stirring dimension of the concrete during the stirring process are greatly increased. Compared with a single stirring assembly, the parallel arrangement of multiple groups enables the concrete to be fully stirred in a wider space, and the concrete materials in different areas are uniformly mixed, avoiding the occurrence of insufficient local stirring or uneven material distribution. This comprehensive and meticulous stirring method helps to improve the homogeneity of the concrete as a whole, ensures that various performance indicators of the concrete remain highly consistent at different positions, and provides a more stable and reliable material basis for subsequent construction.
[0010] Secondly, the key feature that the rotation directions of the adjacent stirring shafts are opposite is of great significance. This reverse rotation design ingeniously utilizes the interaction between the stirring shafts to form a complex and orderly flow pattern inside the concrete. When the adjacent stirring shafts rotate in opposite directions, the concrete flow driven by them will produce strong convection and collision in the middle area. This convection and collision can effectively break the agglomerated structure that may exist in the concrete, so that various particle size aggregates, powders and additives and other components are more uniformly dispersed in the liquid phase. At the same time, the reverse rotation can further enhance the shear force of stirring, promote the microstructure of the concrete to be more dense and uniform, and thus significantly improve the comprehensive performance of the concrete, such as strength, durability and the like.
[0011] Furthermore, the end of the stirring rod adopts a ball-spiral composite structure, which exhibits excellent performance advantages. During stirring, the special shape of the ball head can generate local vortexes around it. Coarse aggregates in the concrete are prone to form aggregates due to factors such as gravity and friction, and the local vortexes generated by the ball head can impact these aggregates in a high-frequency and high-intensity manner, breaking them up and redistributing them in the concrete system. The design of the spiral blade is indispensable. The spiral blade can generate a stable axial thrust during stirring. This axial thrust has multiple effects, the most critical of which is that it can effectively offset the pressure loss caused by the reverse rotation of adjacent stirring shafts. Under the action of the reverse rotating stirring shaft, complex pressure changes occur inside the concrete, and pressure loss may occur in some areas, affecting the stirring effect. The axial thrust generated by the spiral blade can balance these pressure losses, ensuring that the pressure distribution in the entire stirring area is relatively uniform, maintaining a good stirring environment. In addition, the axial thrust can also push the concrete to form an orderly axial flow in the stirring cavity, further enhancing the uniformity and continuity of stirring, so that the concrete can be fully and uniformly stirred in all parts.
[0012] Finally, the staggered stirring rods form a three-dimensional shear plane, which brings unique advantages to concrete stirring. During rotation, the staggered stirring rods cooperate with each other to form a three-dimensional shear plane. This three-dimensional shear plane can shear the concrete from multiple angles and directions, greatly increasing the relative movement and friction between the particles in the concrete. Through this all-around shearing action, the various components in the concrete can be more fully mixed and dispersed, and the microstructure is further optimized. Compared with traditional planar shearing or simple stirring methods, the three-dimensional shear plane can more effectively break down the aggregate structure and uneven distribution inside the concrete, making the performance indicators of the concrete more stable and excellent.
[0013] In summary, the anti-setting concrete nozzle based on the above unique design has significant advantages in preventing concrete from setting compared to traditional equipment. Due to the limitations of stirring method and structure, traditional equipment often cannot guarantee that the concrete is in a uniform and stable state for a long time, and is prone to local setting or inconsistent hardening problems. The anti-setting concrete nozzle of the present application can efficiently stir and homogenize the concrete from multiple levels and angles through a series of innovative designs such as multiple parallel stirring assemblies, reverse rotating stirring shafts, ball-spiral composite structure stirring rods, and three-dimensional shear planes formed by staggered stirring rods, which can continuously maintain the good fluidity and stability of the concrete, effectively inhibit the chemical reaction speed inside the concrete, thereby greatly reducing the possibility of concrete setting, providing more reliable protection for the concrete construction process, and ensuring that the engineering quality reaches a higher level.
[0014] Preferably, the two adjacent tapered chambers are connected by a tapered connecting chamber, and the inner wall of the tapered connecting chamber is tapered.
[0015] The continuous spiral ribs can greatly enhance the flowability and mixing effect of the materials in the shell. During the mixing process, the spiral ribs can guide the materials to flow along a specific spiral path, avoiding local accumulation or dead angles, thereby making the entire mixing process more uniform and efficient. At the same time, the continuous spiral shape of the ribs helps to increase the contact area between the materials and the inner wall of the shell, strengthening the friction and shear between the materials and the inner wall, further improving the mixing degree and ensuring that the materials can achieve higher mixing quality standards during the mixing process, meeting the strict requirements of various complex processes for material mixing uniformity.
[0016] Preferably, the cross-section of the spiral rib is trapezoidal structure, and the top width is less than the base width.
[0017] From the perspective of mechanics, trapezoidal structure can better withstand the pressure and impact force generated during the mixing process compared to other shapes, ensuring that the spiral rib maintains a stable structure even in a long-term high-intensity working environment, reducing the risk of deformation or damage, thereby prolonging the service life of the equipment.
[0018] Preferably, the driving mechanism includes a closed-loop controlled variable frequency motor system, which is equipped with a viscosity sensor and can dynamically adjust the speed of the mixing shaft according to the real-time detection of the rheological properties of the concrete.
[0019] The closed-loop controlled variable frequency motor system combined with the configuration of the viscosity sensor realizes intelligent and precise control of the mixing process. By real-time detection of the rheological properties of the concrete, such as viscosity, fluidity and other key parameters, the system can quickly respond and dynamically adjust the speed of the mixing shaft. When the viscosity of the concrete is high, the speed of the mixing shaft is automatically increased to provide sufficient mixing power to ensure that the concrete is fully mixed and uniform; when the viscosity of the concrete is low, the speed of the mixing shaft is correspondingly reduced to avoid excessive mixing, which can cause energy waste and negative effects on the performance of the concrete. This adaptive adjustment mechanism not only greatly improves the mixing quality, ensuring that the performance indicators of the concrete meet the engineering requirements, but also significantly improves the energy utilization efficiency of the equipment, reduces production costs, embodies the design concept of energy saving and environmental protection, and meets the needs of modern industry for efficient and intelligent production equipment.
[0020] Preferably, the transmission assembly adopts a universal joint.
[0021] In actual equipment operation process, due to various factors, the stirring shaft may appear a certain degree of radial deflection, if not timely and effective compensation and centering adjustment, will lead to the cooperation precision between the stirring shaft and other components, and then cause a series of problems such as equipment vibration, noise increase and parts wear, seriously affect the normal operation and service life of the equipment. And the use of universal coupling with angle compensation function, can realize the centering adjustment in the specified ± 2° range when the stirring shaft appears radial deflection, ensure that the stirring shaft is always in good working condition. This not only effectively reduces the vibration and noise level in the equipment operation process, improves the stability and reliability of the equipment, but also greatly reduces the wear of parts caused by misalignment, reduces the maintenance cost of the equipment, improves the overall operation efficiency of the equipment, and ensures the continuity and stability of the production process.
[0022] Preferably, the inner wall of the shell is compounded with a wear-resistant layer.
[0023] In the material stirring process, especially when dealing with some high hardness or strong abrasive materials, the inner wall of the shell will be subjected to frequent friction and impact, which can easily lead to the wear of the inner wall, and then affect the sealing performance and service life of the equipment. By compounding a wear-resistant layer on the inner wall of the shell, the wear resistance of the inner wall can be significantly improved, effectively resisting the wear of the material, prolonging the service life of the shell, reducing the replacement frequency and maintenance cost of the equipment. At the same time, the existence of the wear-resistant layer can also reduce the risk of impurities mixed into the material due to the wear of the inner wall, ensure the purity and quality stability of the material, meet the strict requirements of different industries for product quality. In addition, the compounding of the wear-resistant layer can also enhance the overall strength and rigidity of the shell to a certain extent, improve the structural stability of the equipment, so that it can better withstand the load under various working conditions in the long-term operation process, and ensure the reliable operation of the equipment.
[0024] Preferably, the stirring shaft is a hollow tubular structure, and an axial cooling medium channel is arranged in the inner cavity of the stirring shaft, and the channel end is connected with an external cooling system through a rotary joint.
[0025] From the perspective of heat dissipation, during the stirring operation, the continuous friction between the stirring shaft and the material, as well as the energy loss generated by the motor drive, will inevitably be converted into heat, causing the temperature of the stirring shaft to rise. Excessive temperature will affect the mechanical properties of the stirring shaft itself, accelerate material aging and fatigue, and also have adverse effects on the properties of the material. However, by setting an axial cooling medium channel connected to the external cooling system through a rotary joint, a high-efficiency heat exchange cycle can be formed. The cooling medium flows in the channel, continuously taking away the heat generated by the stirring shaft, ensuring that the stirring shaft maintains within the appropriate temperature range during the entire working process, effectively avoiding various problems caused by overheating, greatly extending the service life of the stirring shaft, and ensuring the stability and reliability of the equipment operation. Secondly, from the perspective of structural optimization, the hollow tubular structure significantly reduces the weight of the stirring shaft while ensuring that the stirring shaft has sufficient strength and rigidity to meet the torque transmission required for stirring work. This not only reduces the energy consumption required for motor driving and improves energy utilization efficiency, but also reduces the overall load of the equipment, which is beneficial to the installation, debugging, and subsequent maintenance of the equipment. At the same time, the lighter stirring shaft generates relatively small inertial force during operation, which helps to reduce the vibration and noise level of the equipment during operation, improving the overall operation quality of the equipment.
[0026] Preferably, the height of the spiral ribs gradually decreases along the direction of material flow.
[0027] From the perspective of fluid mechanics, the gradual decrease of the rib height can guide the material to form a special flow pattern, generating a more complex and orderly fluid motion mode in the stirring chamber. This unique fluid motion helps to further promote the microscopic mixing between materials, enabling different components of the material to achieve more thorough intermingling at the molecular level, thereby significantly improving the mixing uniformity of the material and ensuring the stability and consistency of the final product quality. At the same time, this design helps to reduce the flow resistance of the material during stirring, improve the conveying efficiency of the material, reduce energy consumption, and improve the operation efficiency and economy of the entire stirring equipment.
[0028] Preferably, the free edge of the spiral blade is provided with a sawtooth.
[0029] During the concrete mixing process, the main role of the spiral blade is to push the material to flow and assist in mixing. The presence of the sawtooth greatly enhances the interaction between the spiral blade and the material. The sharp shape of the sawtooth can act like a tiny cutting tool, effectively cutting and breaking up the agglomerated particles during the material flow process. Especially for those stubborn agglomerates formed due to uneven water distribution or inter-particle attractive forces, the sawtooth can penetrate them with its sharp edge and break them down into smaller particles, significantly improving the dispersion of the material. In addition, the sawtooth can also produce tiny disturbances on the surface of the material, changing the local flow state of the material. This tiny disturbance will trigger a series of chain reactions, causing more small-scale vortices in the mixing chamber, further enhancing the microscopic effects of mixing. Compared with ordinary smooth-edged spiral blades, the spiral blade with sawtooth can make the concrete material reach higher uniformity and better dispersion in the same mixing time, helping to improve the overall quality and performance stability of the concrete, ensuring that the concrete can meet various strict engineering requirements in actual application.
[0030] The beneficial effects of the present application compared to the prior art are:
[0031] The anti-settling concrete nozzle of the present application has significant advantages in preventing the setting of concrete compared to traditional equipment. Due to the limitations of mixing method and structure, traditional equipment often cannot guarantee that the concrete is in a uniform and stable state for a long time, and is prone to problems such as local setting or inconsistent hardening. The anti-settling concrete nozzle of the present application, through a series of innovative designs such as multiple parallel mixing assemblies, counter-rotating mixing shafts, ball-spiral composite structure mixing rods, and three-dimensional shearing surfaces formed by staggered mixing rods, efficiently mixes and homogenizes the concrete from multiple levels and angles, continuously maintains the good fluidity and stability of the concrete, effectively inhibits the chemical reaction rate inside the concrete, greatly reduces the possibility of setting of the concrete, provides more reliable protection for the concrete construction process, and ensures that the engineering quality reaches a higher level. BRIEF DESCRIPTION OF DRAWINGS
[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0033] Figure 1 The structure diagram of the anti-settling concrete nozzle of an embodiment of the present application.
[0034] Figure 2 The structure diagram of the anti-settling concrete nozzle of an embodiment of the present application.Figure 1 Zoomed-in view of the central A region.
[0035] Label explanation: housing (1), feed end (2), tapered chamber (3), discharge end (4), stirring assembly (5), stirring shaft (6), rotating support structure (7), stirring rod set (8), stirring rod (9), drive mechanism (10), transmission assembly (11), ball-head-spiral composite structure (12), end ball (13), spiral fin (14), conical connection cavity (15), spiral fin rib (16), universal coupling (17), sawtooth (18). DETAILED DESCRIPTION
[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.
[0038] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present application, it is understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0039] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present application, it is understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0040] The technical solutions in the present application will be described below with reference to the drawings.
[0041] The embodiment provides an anti-condensation concrete nozzle, which comprises a shell 1 and three groups of stirring assemblies 5, the shell 1 is sequentially provided with an inlet end 2, at least three groups of tapered chambers 3 and an outlet end 4 along the material flow direction; the three groups of stirring assemblies 5 are correspondingly arranged in the respective tapered chambers 3, each group of stirring assemblies 5 comprises a stirring shaft 6, a group of stirring rods 9 and a driving mechanism 10; the two ends of the stirring shaft 6 are connected with the shell 1 through a rotating support structure 7; the group of stirring rods 9 is composed of a plurality of stirring rods 9 which are uniformly distributed along the circumferential direction of the stirring shaft 6; the driving mechanism 10 is connected with the stirring shaft 6 through a transmission assembly 11; wherein the stirring shafts 6 of the adjacent stirring assemblies 5 are parallel to each other and rotate in opposite directions, the overhanging end of each stirring rod 9 is provided with a ball-spiral composite structure 12, the composite structure is composed of an end ball 13 and a spiral blade 14 which extends along the axial direction of the stirring rod 9; the stirring rods 9 of the adjacent stirring assemblies 5 are arranged in a staggered manner in the axial direction, and the rotation direction of the spiral blade 14 is matched with the rotation direction of the corresponding stirring shaft 6.
[0042] Firstly, regarding the arrangement of the parallel stirring assemblies 5. By arranging three groups of parallel stirring assemblies 5, the action range and stirring dimension of the concrete during the stirring process are greatly increased. Compared with a single stirring assembly 5, the parallel arrangement of multiple groups enables the concrete to be fully stirred in a wider space, and the concrete materials in different areas are uniformly mixed, avoiding the occurrence of insufficient local stirring or uneven material distribution. This comprehensive and meticulous stirring method helps to improve the homogeneity of the concrete as a whole, ensures that various performance indicators remain highly consistent in different parts, and provides a more stable and reliable material basis for subsequent construction.
[0043] Secondly, the key feature that the rotation directions of the adjacent stirring shafts 6 are opposite is of great significance. This reverse rotation design ingeniously utilizes the interaction between the stirring shafts 6 to form a complex and orderly flow pattern inside the concrete. When the adjacent stirring shafts 6 rotate in opposite directions, the concrete fluid driven by them will produce strong convection and collision in the middle region. This convection and collision can effectively break the agglomerated structure that may exist in the concrete, making various particle size aggregates, powders and external additives more uniformly dispersed in the liquid phase. At the same time, the reverse rotation can further enhance the shear force of stirring, promote the microstructure of the concrete to be more dense and uniform, and thus significantly improve the comprehensive performance of the concrete, such as strength, durability, etc.
[0044] Furthermore, the end of the stirring rod 9 adopts a ball-spiral composite structure 12, which exhibits excellent performance advantages. During stirring, the special shape of the ball can generate local vortexes around it. Coarse aggregates in concrete are prone to form clusters due to factors such as gravity and friction, and the local vortexes generated by the ball can impact these clusters in a high-frequency and high-intensity manner, breaking them up and redistributing them in the concrete system. The design of the spiral blade 14 is indispensable. The spiral blade 14 can generate a stable axial thrust during stirring. This axial thrust has multiple effects, most importantly, it can effectively offset the pressure loss caused by the reverse rotation of adjacent stirring shafts 6. Under the action of the reverse rotating stirring shaft 6, complex pressure changes occur inside the concrete, and pressure loss may occur in some areas, affecting the stirring effect. The axial thrust generated by the spiral blade 14 can balance these pressure losses, ensuring relatively uniform pressure distribution throughout the stirring area and maintaining a good stirring environment. In addition, the axial thrust can also push the concrete to form an orderly axial flow in the stirring chamber, further enhancing the uniformity and continuity of stirring, so that the concrete can be fully and uniformly stirred in all parts.
[0045] Finally, the staggered stirring rods 9 form a three-dimensional shear plane, which brings unique advantages to concrete stirring. During rotation, the staggered stirring rods 9 cooperate with each other to form a three-dimensional shear plane. This three-dimensional shear plane can shear the concrete from multiple angles and directions, greatly increasing the relative movement and friction between the particles inside the concrete. Through this all-around shearing action, the various components in the concrete can be more fully mixed and dispersed, and the microstructure is further optimized. Compared with traditional planar shearing or simple stirring methods, the three-dimensional shear plane can more effectively destroy the agglomerate structure and uneven distribution inside the concrete, making the performance indicators of the concrete more stable and excellent.
[0046] In summary, the anti-setting concrete nozzle based on the above unique design has significant advantages in preventing concrete from setting compared to traditional equipment. Due to the limitations of stirring method and structure, traditional equipment often cannot guarantee that the concrete is in a uniform and stable state for a long time, and is prone to problems such as local setting or inconsistent hardening. The anti-setting concrete nozzle of the present application can efficiently stir and homogenize the concrete from multiple levels and angles through a series of innovative designs such as the multiple parallel stirring assemblies 5, the reverse rotating stirring shafts 6, the ball-spiral composite structure stirring rods 9, and the three-dimensional shear plane formed by the staggered stirring rods 9, which can continuously maintain the good fluidity and stability of the concrete, effectively inhibit the chemical reaction speed inside the concrete, thereby greatly reducing the possibility of concrete setting, providing more reliable protection for the concrete construction process, and ensuring that the engineering quality reaches a higher level.
[0047] In this embodiment, the two adjacent tapered chambers 3 are connected by a tapered connecting cavity 15, and the inner wall of the tapered connecting cavity 15.
[0048] The arrangement of the continuous spiral convex ribs 16 can greatly enhance the flowability and stirring effect of the materials in the shell 1. During the stirring process of the materials, the spiral convex ribs 16 can guide the materials to flow along a specific spiral path, avoiding the occurrence of local accumulation or stirring dead angle of the materials, so that the entire stirring process is more uniform and efficient. At the same time, the convex ribs in the continuous spiral shape help to increase the contact area between the materials and the inner wall of the shell 1, strengthen the friction and shear action between the materials and between the materials and the inner wall, further improve the degree of stirring, and ensure that the materials can reach higher mixing quality standards during the stirring process, meeting the strict requirements of various complex processes for the uniformity of material stirring.
[0049] In this embodiment, the cross section of the spiral convex rib 16 is in a trapezoidal structure, and the top width is less than the base width.
[0050] From the perspective of mechanical principles, compared with other shapes, the trapezoidal structure can better withstand the pressure and impact force generated by the materials during the stirring process, ensure that the spiral convex rib 16 still maintains a stable structural form under long-term high-strength working environment, and is not prone to deformation or damage, thereby prolonging the service life of the equipment.
[0051] In this embodiment, the driving mechanism 10 includes a closed-loop controlled variable frequency motor system, which is configured with a viscosity sensor and can dynamically adjust the rotation speed parameter of the stirring shaft 6 according to the real-time detection of the rheological properties of the concrete.
[0052] The closed-loop controlled variable frequency motor system combined with the configuration of the viscosity sensor realizes intelligent and precise control of the stirring process. By real-time detection of the rheological properties of the concrete, such as viscosity, fluidity and other key parameters, the system can quickly respond and dynamically adjust the rotation speed of the stirring shaft 6. When the viscosity of the concrete is high, the rotation speed of the stirring shaft 6 is automatically increased to provide sufficient stirring power to ensure that the concrete can be fully and uniformly stirred. When the viscosity of the concrete is low, the rotation speed of the stirring shaft 6 is correspondingly reduced to avoid excessive stirring, which can cause energy waste and negative effects on the performance of the concrete. This adaptive adjustment mechanism not only greatly improves the stirring quality and ensures that the performance indicators of the concrete meet the engineering requirements, but also significantly improves the energy utilization efficiency of the equipment, reduces the production cost, embodies the design concept of energy saving and environmental protection, and meets the needs of modern industry for efficient and intelligent production equipment.
[0053] In this embodiment, the transmission assembly 11 adopts a universal joint 17.
[0054] During actual equipment operation, the stirring shaft 6 may be radially deflected to a certain extent due to various factors. If compensation and centering adjustment cannot be timely and effectively performed, the cooperation precision between the stirring shaft 6 and other components will be reduced, which will further cause a series of problems such as intensified equipment vibration, increased noise, accelerated wear of parts, and the like, seriously affecting the normal operation and service life of the equipment. However, the universal coupling 17 with the angle compensation function can automatically realize centering adjustment within the specified ±2° range when the stirring shaft 6 is radially deflected, ensuring that the stirring shaft 6 is always in a good working state. This not only effectively reduces the vibration and noise level during equipment operation, improves the stability and reliability of the equipment, but also greatly reduces the wear of parts caused by misalignment, reduces the maintenance cost of the equipment, improves the overall operation efficiency of the equipment, and ensures the continuity and stability of the production process.
[0055] In this embodiment, the inner wall of the shell 1 is compounded with a wear-resistant layer.
[0056] During material stirring, especially when dealing with materials with high hardness or strong abrasiveness, the inner wall of the shell 1 will be subjected to frequent friction and impact, which can easily cause the inner wall to wear, thereby affecting the sealing performance and service life of the equipment. By compounding the wear-resistant layer on the inner wall of the shell 1, the wear resistance of the inner wall can be significantly improved, effectively resisting the wear of the material, prolonging the service life of the shell 1, and reducing the replacement frequency and maintenance cost of the equipment. At the same time, the presence of the wear-resistant layer can also reduce the risk of impurities mixing into the material due to the wear of the inner wall, ensuring the purity and quality stability of the material and meeting the strict requirements of different industries for product quality. In addition, the compounding of the wear-resistant layer can also enhance the overall strength and rigidity of the shell 1 to some extent, improve the structural stability of the equipment, and enable it to better withstand various working conditions during long-term operation, ensuring the reliable operation of the equipment.
[0057] In this embodiment, the stirring shaft 6 is a hollow tubular structure, and an axial cooling medium channel is arranged in the inner cavity of the stirring shaft 6. The ends of the channel are connected to an external cooling system through a rotary joint.
[0058] From the perspective of heat dissipation, during the stirring operation, the continuous friction between the stirring shaft 6 and the material and the energy loss generated by the motor drive will inevitably be converted into heat, causing the temperature of the stirring shaft 6 to rise. Excessive temperature will affect the mechanical properties of the stirring shaft 6 itself, accelerate material aging and fatigue, and also have an adverse effect on the properties of the material. However, by providing an axially through cooling medium channel and connecting it to an external cooling system through a rotary joint, an efficient heat exchange cycle can be formed. The cooling medium flows in the channel, continuously taking away the heat generated by the stirring shaft 6, ensuring that the stirring shaft 6 maintains within an appropriate temperature range during the entire working process, effectively avoiding various problems caused by overheating, greatly prolonging the service life of the stirring shaft 6, and ensuring the stability and reliability of the equipment operation. Secondly, from the perspective of structural optimization, the hollow tubular structure significantly reduces the weight of the stirring shaft 6 while ensuring that the stirring shaft 6 has sufficient strength and rigidity to meet the torque transmission required for stirring work. This not only reduces the energy consumption required for motor driving and improves energy utilization efficiency, but also reduces the overall load of the equipment, which is beneficial to the installation, debugging and subsequent maintenance of the equipment. At the same time, the inertia force generated by the lighter stirring shaft 6 during operation is relatively small, which helps to reduce the vibration and noise level during equipment operation and improve the overall operation quality of the equipment.
[0059] In this embodiment, the rib height of the spiral rib 16 gradually decreases along the material flow direction.
[0060] From the perspective of fluid mechanics, the gradual decrease of the rib height can guide the material to form a special flow pattern, generating a more complex and orderly fluid motion mode in the stirring cavity. This unique fluid motion helps to further promote the microscopic mixing between materials, allowing different components of the material to achieve more thorough intermingling at the molecular level, thereby significantly improving the mixing uniformity of the material and ensuring the stability and consistency of the final product quality. At the same time, this design helps to reduce the flow resistance of the material during stirring, improve the conveying efficiency of the material, reduce energy consumption, and improve the operation efficiency and economy of the entire stirring equipment.
[0061] In this embodiment, the free edge of the spiral fin 14 is provided with a sawtooth 18.
[0062] During the mixing process, the main function of the spiral blade 14 is to push the material to flow and assist the mixing. The presence of the sawteeth 18 greatly enhances the interaction between the spiral blade 14 and the material. The sharp shape of the sawteeth 18 can act like tiny cutting tools to effectively cut and break the agglomerated particles during the material flow. Especially for those stubborn agglomerates formed due to uneven water distribution or inter-particle attractive forces, the sawteeth 18 can penetrate into them with their sharp edges and break them down into smaller particles, thus significantly improving the degree of dispersion of the material. In addition, the sawteeth 18 can also generate tiny disturbances on the surface of the material, changing the local flow state of the material. This tiny disturbance will trigger a series of chain reactions, prompting the material to form more small-scale vortices in the mixing chamber, further enhancing the microscopic effect of mixing. Compared with the ordinary spiral blade 14 with smooth edges, the spiral blade 14 with sawteeth 18 can make the concrete material reach a higher uniformity and better dispersion in the same mixing time, which helps to improve the overall quality and performance stability of the concrete, ensuring that the concrete can meet various strict engineering requirements in actual application.
[0063] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. An anti-settling concrete nozzle characterized by: The utility model relates to a kind of concrete mixing machine, including: Shell (1), sequentially provided with feed end (2), at least two stages of tapered chamber (3) and discharge end (4) along material flow direction; At least two groups of stirring assembly (5) are respectively arranged in each tapered chamber (3), each group of stirring assembly includes: Stirring shaft (6), both ends are connected with shell (1) by rotating support structure (7); Stirring rod group (8) is composed of multiple stirring rods (9) uniformly distributed along the circumference of stirring shaft (6); Driving mechanism (10) is connected with stirring shaft (6) by transmission assembly (11); Wherein, the stirring shaft (6) of adjacent stirring assembly (5) is parallel and the rotating direction is opposite, the overhanging end of each stirring rod (9) is provided with ball head-spiral composite structure (12), the composite structure is composed of end ball (13) and helical blade (14) extending along the axial direction of stirring rod (9); The stirring rod (9) of adjacent stirring assembly (5) is staggered in axial direction, and the rotation direction of its helical blade (14) is adapted to the rotating direction of corresponding stirring shaft (6).
2. The anti-settling concrete nozzle of claim 1, wherein: Adjacent two stages of tapered chamber (3) are transitioned by conical connecting cavity (15), and the inner wall of the conical connecting cavity (15) is provided with helical convex rib (16).
3. The anti-settling concrete nozzle of claim 2, wherein: The cross section of the helical convex rib (16) is trapezoidal structure, and the top width is less than the base width.
4. The anti-settling concrete nozzle of claim 1, wherein: The driving mechanism (10) includes closed-loop controlled variable frequency motor system, which is provided with viscosity sensor, and the rotating speed parameter of stirring shaft (6) can be dynamically adjusted according to the real-time detected concrete flow characteristics.
5. The anti-settling concrete nozzle of claim 1, wherein: The transmission assembly (11) uses universal coupling (17).
6. The anti-settling concrete nozzle of claim 1, wherein: The inner wall of the shell (1) is combined with wear-resistant layer.
7. The anti-settling concrete nozzle of claim 1, wherein: The stirring shaft (6) is hollow tubular structure, and the inner cavity is provided with axial through cooling medium channel, and the channel end is connected with external cooling system through rotating joint.
8. The anti-settling concrete nozzle of claim 3, wherein: The convex rib height of the helical convex rib (16) gradually decreases along the material flow direction.
9. The anti-settling concrete nozzle of claim 3, wherein: The free edge of the helical blade (14) is provided with sawtooth (18).