A concrete synchronous batching system
By working in tandem with the aggregate batching components, the synchronous conveying and initial mixing of aggregate and powder are achieved, solving the problem of material stratification in concrete production and improving the uniformity of mixing and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGSHA QIANGZHONG MACHINERY LEASING CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-23
AI Technical Summary
In current concrete production, the stepwise feeding of powder and aggregate leads to severe stratification of materials in the mixer, affecting the uniformity of mixing and prolonging the mixing time.
The stone batching component and the powder batching component work together, and the stone and powder are conveyed synchronously through the parallel operation of multiple weighing units. They are initially mixed in the guide chamber, and the precise feeding of materials is controlled by air valves to ensure that the stone and powder enter the mixer in proportion.
It enables simultaneous feeding of powder and stone, eliminates material stratification, shortens mixing time, and improves mixing uniformity and finished product quality.
Smart Images
Figure CN224391526U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete batching technology, and in particular to a synchronous concrete batching system. Background Technology
[0002] Current concrete production processes mainly consist of two key stages: batching and mixing. In traditional processes, raw materials such as powder, aggregate, and water need to be accurately weighed before being transported to a mixer for mixing. Currently, the commonly used automatic batching machines have significant technological drawbacks: First, the batching process uses a sequential operation method, with aggregate and powder entering the mixer in a specific order, and water added last according to a set ratio. This step-by-step feeding method results in noticeable stratification of materials within the mixer, significantly prolonging the mixing time and severely impacting the uniformity of the final product.
[0003] In the powder batching process, a screw conveyor combined with a powder weigher is typically used. The screw conveyor transports the powder from the storage silo to the weighing device, and discharges it after reaching the preset weight. While this design ensures weighing accuracy, it cannot achieve synchronous feeding with other materials. Stone batching systems use a combination of silos, weighing devices, and belt conveyors. Stones fall from the silo into the weighing device for metering before being transferred to the conveyor belt. Due to the capacity limitations of the weighing device, this system can only use an intermittent feeding method, resulting in material interruptions on the conveyor belt and preventing the formation of a continuous stone flow. This intermittent conveying further exacerbates the time difference between powder and stone feeding, making material stratification more pronounced. Utility Model Content
[0004] In order to enable the powder and aggregate to be batched simultaneously and to avoid the separation of powder and aggregate during the subsequent mixing process, this application provides a concrete synchronous batching system.
[0005] This application provides a synchronous concrete batching system, which adopts the following technical solution:
[0006] A synchronous batching system for concrete includes an aggregate batching component, a powder batching component, and a guide chamber. The aggregate batching component includes a support frame and an aggregate bin, an aggregate scale, and a belt conveyor mounted on the support frame. Multiple discharge ports are located below the aggregate bin, and an aggregate scale is located below each discharge port. The outlet of the aggregate scale is located above the belt conveyor. The powder batching component includes a powder bin, a screw conveyor, and a powder scale. The screw conveyor transports powder from the powder bin to the powder scale. The ends of both the powder scale and the belt conveyor are connected to the guide chamber, and a feeding chute is located below the guide chamber.
[0007] Optionally, the powder batching assembly is provided in multiple parts, and the outlets of the screw conveyors of the multiple powder batching assemblies are connected to a secondary batching bin. The secondary batching bin is provided with screw blades and a batching motor that drives the screw blades to rotate. The upper part of the secondary batching bin is provided with an inlet for the screw conveyor to connect to, and the lower part is provided with an outlet. The screw blades rotate to transport the powder to the outlet, and the outlet is connected to the guide chamber.
[0008] Optionally, the feeding trough is rotatably connected below the material guiding chamber, and the rotation axis of the feeding trough is set in the vertical direction. The outer wall of the secondary batching bin is also equipped with a feeding motor for driving the feeding trough to rotate.
[0009] Optionally, both the stone weigher and the powder weigher control the opening and closing of their outlets via air valves.
[0010] As can be seen from the above, the concrete synchronous batching system provided in this application, through the coordinated work of the stone batching component and the powder batching component, measures the stone and powder separately and then synchronously transports them to the material guiding chamber, and then feeds them uniformly through the feeding trough. This solves the problem of material stratification caused by traditional step feeding and has the advantages of realizing synchronous feeding, reducing stratification, shortening the mixing time and improving the mixing uniformity. Attached Figure Description
[0011] Figure 1 This is an overall structural diagram of a synchronous concrete batching system according to this application;
[0012] Figure 2 yes Figure 1 Overall structural diagram of the aggregate batching assembly;
[0013] Figure 3 yes Figure 1 Overall structural diagram of the medium powder feed batching component;
[0014] Figure 4 yes Figure 1 Overall structural diagram of the central batching silo.
[0015] Explanation of reference numerals in the attached figures:
[0016] 1. Stone batching assembly; 11. Stone silo; 12. Stone scale; 13. Belt conveyor; 2. Powder batching assembly; 21. Powder silo; 22. Screw conveyor; 23. Powder scale; 3. Secondary batching silo; 31. Batching motor; 4. Guide silo; 41. Feeding chute; 42. Feeding motor. Detailed Implementation
[0017] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0018] In existing technologies, the powder and aggregate are batched in stages during concrete production, resulting in stratification of materials within the mixer. The powder is conveyed to the weighing device via screw conveyor 22 and then discharged, while the aggregate is fed intermittently due to the capacity limitations of the weighing device, causing material breakage on the conveyor belt. This staged feeding leads to insufficient mixing of materials, prolongs the mixing time, and affects the quality of the finished product.
[0019] To address the aforementioned issues, the inventors discovered that stratification stems from differences in the timing of material input, necessitating the establishment of a synchronized input mechanism. For the intermittent material shortage problem, they considered achieving continuous conveying through parallel operation of multiple weighing units. Synchronizing the entry of powder and stone into the mixing node can eliminate stratification, but challenges remain in balancing weighing accuracy with conveying coordination. By setting up independent weighing modules and a unified material guiding structure, synchronous mixing of materials is achieved while ensuring metering accuracy.
[0020] Therefore, this application proposes a synchronous concrete batching system including a stone batching assembly 1, a powder batching assembly 2, and a feed chamber. The stone batching assembly 1 includes a support frame, a stone silo 11, a stone weighing scale 12, and a belt conveyor 13. Multiple discharge ports are provided below the stone silo 11 corresponding to independent stone weighing scales 12. The powder batching assembly 2 includes a powder silo 21, a screw conveyor 22, and a powder weighing scale 23. Both the powder weighing scale 23 and the belt conveyor 13 are connected to the feed chamber at their ends. A feeding chute 41 is provided below the feed chamber.
[0021] The multiple discharge ports below the stone silo 11 refer to discrete unloading points located at the bottom of the silo body. These can be implemented using equidistant openings, each equipped with an independent control gate. This design allows stones from different discharge ports to be weighed simultaneously, avoiding material shortages caused by insufficient capacity of a single weighing unit. The belt conveyor 13, located below the outlet of the stone scale 12, is a horizontally arranged continuous conveying device, which can be implemented using a rubber belt conveyor mechanism with adjustable operating speed. This structure ensures that materials from each stone scale 12 can promptly flow into the conveyor belt to form a continuous material flow. Multiple feed inlets are located at the top of the guide chamber. This structure allows for cross-mixing of stones and powders in the vertical direction, eliminating horizontal stratification. The feeding trough 41, connected below the guide chamber, is a rotatable unloading channel that can rotate around a vertical axis. This can be implemented using a flange and bearing assembly. This design allows the mixed materials to be evenly distributed to receiving devices in different locations.
[0022] Specifically, after each outlet of the stone silo 11 is independently weighed by the corresponding stone scale 12, the material falls sequentially into the belt conveyor 13 to form a continuous material flow. Powder is quantitatively conveyed to the powder scale 23 via the screw conveyor 22, and after weighing to the required standard, it enters the guide chamber simultaneously with the stone at the end of the belt conveyor 13. The two materials undergo preliminary mixing in the guide chamber due to their intersecting falling trajectories, and the mixture is then directionally fed into the rotating feeding trough 41. By controlling the operating sequence of each stone scale 12, the stone on the belt conveyor 13 is kept in a continuous conveying state, eliminating the material interruption gaps caused by traditional single weighing unit operations. The synchronous unloading of the powder scale 23 and the stone scale 12 ensures that the materials enter the mixing stage simultaneously according to a preset ratio.
[0023] Compared to existing technologies, traditional methods involve stone and powder entering the mixer in stages, resulting in significant material stratification. This solution, however, achieves preliminary mixing before feeding via a feed chamber. Existing stone batching methods require machine shutdown for unloading due to capacity limitations of the weighing units. This solution maintains continuous operation of the belt conveyor 13 through the alternating operation of multiple weighing units. Conventional powder conveying relies on intermittent operation of a single screw conveyor; this solution achieves precise metering and synchronous unloading control through an independent powder weigher 23.
[0024] Through the above technical solution, this application achieves simultaneous weighing and mixing of stone and powder, eliminating material stratification. The alternating operation of multiple stone weighers 12 ensures continuous material supply from the belt conveyor 13, avoiding production efficiency losses caused by material interruptions. The guide chamber structure promotes uniform mixing of materials before they enter the mixer, shortening subsequent mixing time and improving the stability of finished product quality.
[0025] This application further proposes that the powder batching assembly 2 is provided in multiple ways, and the outlets of the screw conveyors 22 of the multiple powder batching assemblies 2 are connected to a secondary batching bin 3. The secondary batching bin 3 is provided with screw blades and a batching motor 31 that drives the screw blades to rotate. The upper part of the secondary batching bin 3 is provided with an inlet for the screw conveyors 22 to connect to, and the lower part is provided with an outlet. The screw blades rotate to transport the powder to the outlet, and the outlet is connected to the guide chamber.
[0026] The secondary batching silo 3 is a container used to centrally receive materials output from multiple powder batching components 2. Specifically, it can be implemented using a metal silo structure with an inlet and an outlet, and its internal space is configured to allow for preliminary mixing of different powders. The spiral blade is a rotatable conveying component installed inside the secondary batching silo 3, specifically implemented using a single-axis spiral structure, which propels materials from the inlet to the outlet through rotational motion. The batching motor 31 is the power device that drives the spiral blade to rotate, specifically implemented using an AC motor with a reducer, whose output shaft is connected to the central shaft of the spiral blade.
[0027] Specifically, the screw conveyors 22 of multiple powder batching components 2 transport different types or batches of powder to the inlet of the secondary batching silo 3. Within the secondary batching silo 3, the powder is continuously agitated by the screw blades and moves axially. The rotational speed of the screw blades can be adjusted by the batching motor 31, for example, controlled within the range of 10-30 revolutions per minute, allowing for controllable residence time of the powder within the secondary batching silo 3. Driven by the screw blades, the powder forms a continuous flow, and different powders interpenetrate and mix during this movement. The powder that has completed preliminary mixing is discharged from the outlet of the secondary batching silo 3 and enters the guide chamber to merge with the aggregate.
[0028] Compared to existing technologies, the independent operation of the existing powder batching component 2 results in powder directly entering the mixer, causing stratification due to the separation of different powders along the conveying path. This solution adds a secondary batching bin 3, allowing multiple powder sources to undergo preliminary mixing before entering the guide chamber. The mechanical agitation of the spiral blades forcibly breaks the powder stratification trend. In existing technologies, powder mixing relies on a single mixer stage, while this solution achieves pre-mixing during the batching stage, shortening subsequent mixing time.
[0029] Through the above technical solution, this application solves the problem of coordinated mixing of multiple powder batching components 2, avoiding uneven mixing caused by stratification of powders during the stirring process. After preliminary mixing in the secondary batching silo 3, the powders enter the guide chamber synchronously with the aggregates, reducing the load on subsequent mixing processes. The directional conveying of the spiral blades ensures continuous and controllable powder flow, eliminating mixing fluctuations caused by intermittent unloading. The structural design of the secondary batching silo 3 allows different powders to fully contact each other in space, reducing the risk of material separation and improving the final mixing uniformity.
[0030] This application further proposes that the feeding trough 41 is rotatably connected to the bottom of the guiding chamber, the rotation axis of the feeding trough 41 is set in the vertical direction, and the feeding motor 42 for driving the rotation of the feeding trough 41 is mounted on the outer wall of the secondary batching bin 3.
[0031] The rotating connection refers to the connection between the feeding trough 41 and the guiding chamber via bearings or a turntable structure. Specifically, a flange with rolling bearings can be used to allow the feeding trough 41 to rotate around its axis. The vertical axis of rotation refers to the axis of rotation being perpendicular to the ground. Specifically, a vertical shaft structure can be used to support the feeding trough 41 to prevent centrifugal displacement of the material due to tilted rotation. The feeding motor 42 being mounted on the outer wall of the secondary batching silo 3 means that the motor is fixed to the outside of the silo body with bolts. Specifically, a coupling or gear set can be used to connect the motor to the rotating shaft of the feeding trough 41 to achieve power transmission.
[0032] Specifically, when the feeding trough 41 rotates around its vertical axis under the drive of the motor, its outlet direction dynamically changes with the rotation angle, allowing materials to fall into subsequent processes from different directions. The motor controls its speed and direction, enabling the feeding trough 41 to periodically adjust its material drop trajectory, covering a wider feeding area. The vertical axis design prevents materials from shifting outwards due to inertia during rotation, ensuring a stable vertical drop trajectory. The motor mounting method on the outer wall of the secondary batching silo 3 keeps the drive components away from the material channel, preventing powder from entering the mechanical transmission structure.
[0033] Compared to existing technologies, the traditional fixed feeding trough 41 has a single material drop direction, resulting in localized material accumulation within the mixing container. This solution, however, actively controls the rotation angle of the feeding trough 41, causing the material to fall in a dispersed manner, expanding the coverage area to several times that of the original fixed angle. In existing technologies, tilting rotation mechanisms easily cause material displacement, while vertical axis rotation eliminates the influence of centrifugal force on material distribution, thus improving mixing uniformity.
[0034] Through the above technical solution, this application solves the material stratification problem caused by the fixed feeding trough 41, optimizing the spatial distribution of powder and stone before mixing and reducing the time required for subsequent stirring. The rotation of the feeding trough 41 is precisely controlled by a motor, and the rotation frequency can be adjusted according to different material characteristics to adapt to various mixing ratios. The combination design of the vertical axis and the external motor improves mixing efficiency while avoiding interference between the mechanical structure and the material, reducing maintenance difficulty.
[0035] This application further proposes that both the stone weighing scale 12 and the powder weighing scale 23 have their outlets opened and closed by air valves.
[0036] Among them, the air valve refers to the actuator that uses air pressure to open and close the material passage. Specifically, it can be implemented using a solenoid valve or a pneumatic valve, which controls the opening and closing state of the valve by receiving electrical signal commands from the weighing system. The rapid response characteristic of this air valve allows it to act immediately when the weight reaches the preset value, avoiding the delay caused by inertia or friction in traditional mechanical valves.
[0037] Specifically, after the stone scale 12 or powder scale 23 completes weighing, the control system sends an opening signal to the corresponding air valve. The air valve opens its outlet within milliseconds, and the material is immediately discharged into the feed chamber. When the weighing sensor detects that the material has been discharged, the air valve receives a closing signal and quickly closes its outlet. Because the action time of the air valve is much shorter than that of the mechanical valve, the start and end times of the discharge of stone and powder can be precisely synchronized, ensuring that the two materials enter the feed chamber simultaneously in proportion.
[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A synchronous concrete batching system, characterized in that: The system includes a stone batching assembly, a powder batching assembly, and a guide chamber. The stone batching assembly includes a support frame and a stone silo, a stone scale, and a belt conveyor mounted on the support frame. The stone silo has multiple discharge ports below it, and a stone scale is located below each discharge port. The outlet of the stone scale is located above the belt conveyor. The powder batching assembly includes a powder silo, a screw conveyor, and a powder scale. The screw conveyor is used to transport powder from the powder silo to the powder scale. The ends of the powder scale and the belt conveyor are both connected to the guide chamber, and a feeding chute is located below the guide chamber.
2. The concrete synchronous batching system according to claim 1, characterized in that: The powder batching assembly is provided in multiple parts, and the outlets of the screw conveyors of the multiple powder batching assemblies are connected to a secondary batching bin. The secondary batching bin is provided with screw blades and a batching motor that drives the screw blades to rotate. The upper part of the secondary batching bin is provided with an inlet for the screw conveyor to connect to, and the lower part is provided with an outlet. The screw blades rotate to transport the powder to the outlet, and the outlet is connected to the guide chamber.
3. The concrete synchronous batching system according to claim 2, characterized in that: The feeding trough is rotatably connected to the lower part of the guiding chamber, and the rotation axis of the feeding trough is set in the vertical direction. The outer wall of the secondary batching bin is also equipped with a feeding motor for driving the feeding trough to rotate.
4. A synchronous concrete batching system according to claim 3, characterized in that: Both the stone weigher and the powder weigher control the opening and closing of their outlets via air valves.