Metering and weighing device for concrete production

Abstract

The utility model relates to concrete production technical field especially relates to a kind of metering and weighing device for concrete production, including frame, weighing structure is equipped on the frame, and blanking structure is equipped on the frame;This kind of metering and weighing device for concrete production, through the weighing structure being set, first motor drive crank connecting rod mechanism, rotation motion is converted into the accurate overturning action of turnover frame, and linear constraint to rotating rod is assisted by guide frame, constructs stable plane kinematic pair, effectively limits lateral sway and inertia impact in overturning process, to ensure that weighing box realizes smooth, controllable overturning motion when unloading, substantially improves the consistency of unloading trajectory, positioning accuracy and operation reliability, while reducing mechanism wear and power loss.

Description

Technical Field

[0001] This utility model relates to the field of concrete production technology, and in particular to a metering and weighing device for concrete production. Background Technology

[0002] Concrete, an indispensable core material in modern construction engineering, is an artificial stone formed by mixing, pouring, and hardening cementitious materials, aggregates, and water in precise proportions. Cement concrete, using cement as the cementitious material and sand and stone as aggregates, is the most widely used, and its performance directly depends on the accuracy of the mix proportions and the uniformity of the mixture. In the industrialized production process of concrete, the precise weighing and proportioning of various raw materials is the primary step in ensuring the strength, durability, and workability of the finished product. Therefore, high-precision and highly stable weighing equipment is crucial for improving the overall quality of concrete and the level of automation in production.

[0003] A concrete batching and weighing mechanism with the existing utility model publication number CN210336438U is disclosed, which specifically includes a base, a mounting frame, a working box, a feed hopper, a discharge hopper, a weighing device, a driver, and a conveyor. The weighing device is located directly below the discharge hopper, and a conveyor belt is provided on the output end of the conveyor, with the conveyor belt located below the weighing device. It also includes a first servo motor, a support frame, a telescopic motor, a support plate, a connecting shaft, a reinforcing frame, and a auger. The outer wall of the auger contacts the inner wall of the discharge hopper's output end. The reinforcing frame is provided on the inner wall of the working box. The telescopic motor is provided on the support frame, and the left output end of the telescopic motor is provided on the left end of the drive shaft. The support plate is provided on the left end of the drive shaft, and the top of the support plate contacts the right side of the bottom end of the weighing device.

[0004] The aforementioned patent also has the following problems: its driver relies solely on a servo motor arranged on one side to directly drive the weighing device to perform the flipping and unloading action. This asymmetrical transmission method results in insufficient overall rigidity of the slewing support structure. Under long-term conditions of bearing off-center load and impact load, the support bearing is prone to wear and clearance, which in turn causes the entire weighing device to produce radial sway and axial sway during the rotation process. This instability not only reduces the accuracy of the material landing point during unloading and affects the material receiving efficiency of the conveyor belt, but also continues to worsen with the accumulation of usage time, seriously restricting the repeatability and long-term weighing reliability of the equipment. Utility Model Content

[0005] The purpose of this utility model is to provide a metering and weighing device for concrete production, so as to solve the problem mentioned in the background art that the existing drive relies on a servo motor arranged on one side to directly drive the weighing device to perform the flipping and unloading action. This asymmetrical transmission method makes the overall rigidity of the slewing support structure insufficient. Under the long-term condition of bearing eccentric load and impact load, the support bearing is prone to wear and clearance, which in turn causes the entire weighing device to produce radial sway and axial sway during the rotation process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a metering and weighing device for concrete production, comprising a frame, a weighing structure on the frame, and a feeding structure on the frame;

[0007] The weighing structure includes a fixed frame, a rotating shaft movably mounted on the fixed frame, a tilting frame mounted on the rotating shaft, a weighing device mounted on the tilting frame, a weighing box mounted on the tilting frame, a discharge pipe mounted on the weighing box, a first motor mounted on the fixed frame, a crank mounted on the drive end of the first motor, a connecting rod movably mounted on the crank and movably connected to the tilting frame, a guide frame mounted on the fixed frame, and a rotating rod mounted on the rotating shaft and adapted to the guide frame.

[0008] Preferably, the frame is provided with support legs, and the tilting frame is provided with reinforcing ribs.

[0009] Preferably, the rotating shaft is adapted to the fixed frame, and the guide frame is adapted to the rotating rod.

[0010] Preferably, the feeding structure includes a feeding frame mounted on the machine frame, a stirring frame movably mounted on the feeding frame, a first pulley mounted on the stirring frame, a discharge frame mounted on the feeding frame, a discharge auger movably mounted inside the discharge frame, a second pulley mounted on the discharge auger, a first transmission belt mounted on the first pulley and the second pulley, a third pulley mounted on the discharge auger, a second motor mounted on the machine frame, a fourth pulley mounted on the drive end of the second motor, and a second transmission belt mounted on the third pulley and the fourth pulley.

[0011] Preferably, the unloading frame is provided with a unloading hopper, and the first motor is fixed to the fixed frame by bolts.

[0012] Preferably, the mixing rack is adapted to the feeding rack, and the second motor is fixed to the frame by bolts.

[0013] Preferably, the discharge pipe is equipped with a discharge valve, and the unloading rack is equipped with reinforcing ribs.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This is a weighing device for concrete production. Through the set weighing structure, the first motor drives the crank-connecting rod mechanism to convert the rotational motion into the precise overturning action of the tilting frame. With the help of the guide frame to linearly constrain the rotating rod, a stable planar motion pair is constructed, which effectively limits the lateral sway and inertial impact during the overturning process. This ensures that the weighing box achieves a smooth and controllable overturning motion when unloading, greatly improving the consistency of the unloading trajectory, positioning accuracy and operational reliability, while reducing mechanism wear and power loss.

[0016] 2. This metering and weighing device for concrete production, through its feeding structure, enables the second motor to synchronously drive the mixing frame and the feeding auger to achieve coordinated operation. The continuous rotation of the mixing frame effectively breaks up any arching or adhesion phenomena that may form in the raw materials within the feeding frame, ensuring that the materials fall evenly and smoothly. At the same time, the feeding auger transports the loosened raw materials to the weighing box at a constant flow rate, realizing coordinated control of the entire process from feeding and arch breaking to precise conveying, significantly improving the uniformity of feeding, the stability of metering, and the overall batching efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0019] Figure 3 This is a partial cross-sectional view of the material discharge rack of this utility model;

[0020] Figure 4 This is a schematic diagram of the mixing rack structure of this utility model;

[0021] In the diagram: 1. Frame; 2. Weighing structure; 201. Fixed frame; 202. Rotating shaft; 203. Tilting frame; 204. Weighing device; 205. Weighing box; 206. Discharge pipe; 207. First motor; 208. Crank; 209. Connecting rod; 210. Guide frame; 211. Rotating rod; 3. Discharge structure; 301. Discharge frame; 302. Mixing frame; 303. First pulley; 304. Discharge frame; 305. Discharge auger; 306. Second pulley; 307. First transmission belt; 308. Third pulley; 309. Second motor; 310. Fourth pulley; 311. Second transmission belt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a metering and weighing device for concrete production, including a frame 1, a weighing structure 2 on the frame 1, and a feeding structure 3 on the frame 1;

[0024] The weighing structure 2 includes a fixed frame 201, a rotating shaft 202 movably mounted on the fixed frame 201, a tilting frame 203 mounted on the rotating shaft 202, a weighing device 204 mounted on the tilting frame 203, a weighing box 205 mounted on the tilting frame 203, a discharge pipe 206 mounted on the weighing box 205, a first motor 207 mounted on the fixed frame 201, a crank 208 mounted on the driving end of the first motor 207, a connecting rod 209 movably mounted on the crank 208 and movably connected to the tilting frame 203, a guide frame 210 mounted on the fixed frame 201, and a rotating rod 211 mounted on the rotating shaft 202 and connected to the weighing device 204. The guide frame 210 is adapted to the tilting frame 203, which has a groove for accommodating the weighing device 204. The weighing box 205 is placed above the weighing device 204. When the tilting frame 203 is offset, the groove can limit the weighing box 205 to prevent it from tipping over. When it is necessary to discharge the material, the first motor 207 is driven. The first motor 207 can drive the crank 208 to rotate. The crank 208 can drive the connecting rod 209 to rotate. The connecting rod 209 can drive the tilting frame 203 to drive the rotating shaft 202 to rotate. When the rotating shaft 202 rotates, it can drive the rotating rod 211 to move within the guide frame 210, which can stabilize the tilting frame 203 when it is tilted. The tilting frame 203 can drive the weighing box 205 to rotate, and then the raw material in the weighing box 205 is discharged through the discharge pipe 206.

[0025] Furthermore, the frame 1 is equipped with legs, which are reliably connected to the main body of the frame 1 through precision-machined threaded structures. These legs can effectively compensate for uneven ground and absorb vibration energy during equipment operation, thereby significantly improving the vibration resistance and static stability of the whole machine during high-speed weighing and tilting. The tilting frame 203 is equipped with reinforcing ribs, which form a complete box-shaped load-bearing structure with the main body of the frame through continuous welding process. This can effectively suppress elastic deformation and low-frequency vibration generated by the frame during frequent start-stop and load changes, providing a stable working posture for the weighing unit.

[0026] Furthermore, the rotating shaft 202 is adapted to the fixed frame 201, and forms a composite support structure with the fixed frame 201 through a high-precision self-aligning roller bearing. The bearing seat adopts a double-sided sealing design and applies an appropriate preload, which effectively controls the radial runout and axial movement caused by the off-center load during the rotation process of the shaft system. This ensures that the weighing unit can maintain extremely high rotational accuracy and running stability during dynamic unloading. The guide frame 210 is adapted to the rotating rod 211, which significantly reduces the inertial impact and vibration noise of the moving parts during frequent start-stop processes, and realizes high-precision, low-resistance, and stable movement of the rotating rod 211 on the guide frame 210.

[0027] Furthermore, the feeding structure 3 includes a feeding rack 301, which is mounted on the frame 1. A stirring rack 302 is movably mounted on the feeding rack 301. A first pulley 303 is mounted on the stirring rack 302. A discharge rack 304 is mounted on the feeding rack 301. A discharge auger 305 is movably mounted inside the discharge rack 304. A second pulley 306 is mounted on the discharge auger 305. A first transmission belt 307 is mounted on the first pulley 303 and the second pulley 306. A third pulley 308 is mounted on the discharge auger 305. A second motor 309 is mounted on the frame 1. A fourth pulley 310 is mounted on the driving end of the second motor 309. A second transmission belt 311 is mounted on the third pulley 308 and the fourth pulley 310. When it is necessary for the raw material to fall evenly, the second motor 309 is driven, and the second motor 309 can drive the fourth pulley 311. When wheel 310 rotates, the second transmission belt 311 drives the third pulley 308 to rotate under the action of the fourth pulley 310. The third pulley 308 can drive the feeding auger to rotate, and the feeding auger can drive the second pulley 306 to rotate. The first transmission belt 307 drives the first pulley 303 to rotate under the action of the second pulley 306. The first pulley 303 can drive the mixing rack 302 to rotate. The raw material enters the unloading rack 301 and does not accumulate under the action of the mixing rack 302. Then, it enters the weighing box 205 through the feeding auger.

[0028] Furthermore, the unloading rack 301 is equipped with a unloading hopper, and the top of the unloading rack 301 integrates a funnel-shaped feeding hopper, which can effectively guide the raw materials smoothly into the unloading cavity, while avoiding blockage caused by material adhesion or material sloshing, ensuring the uniformity and stability of feeding during continuous production. The first motor 207 is fixed to the fixed frame 201 by bolts. This connection method not only ensures the strict coaxiality requirements between the motor output shaft and the transmission system, but also realizes the rapid disassembly and maintenance of the motor through standardized interface design and reasonable operating space reservation, significantly improving equipment maintenance efficiency.

[0029] Furthermore, the mixing frame 302 is adapted to the unloading frame 301, forming an integral mixing chamber through a heavy-duty slewing bearing. This support structure has excellent anti-overturning ability and radial rigidity, and adopts multi-point meshing and pre-tightening adjustment technology to effectively suppress the vibration and sway of the mixing frame 302 when subjected to the impact of heterogeneous materials, thereby ensuring that the mixing mechanism can maintain a stable and reliable operating state under high load conditions. The second motor 309 is fixed to the frame 1 by bolts. This connection method not only ensures the strict parallelism and center distance requirements between the motor output shaft and the transmission pulley system, but also realizes the quick disassembly and precise positioning of the motor through modular positioning design and the reservation of unobstructed operating space, which greatly improves the maintainability and maintenance efficiency of the equipment.

[0030] Furthermore, the discharge pipe 206 is equipped with a discharge valve, which adopts a wear-resistant alloy sealing pair and a linear actuator. It can quickly open and close and precisely adjust the opening degree according to the control system command, thereby effectively controlling the discharge flow of raw materials and avoiding material residue or leakage. The feeding rack 301 is equipped with reinforcing ribs, which significantly improves the bending stiffness and natural frequency of the feeding rack 301 when subjected to stirring vibration and material impact, ensuring the long-term stability and reliability of the feeding system.

[0031] Working principle: When it is necessary for the raw material to fall evenly, the second motor 309 is driven, which in turn drives the fourth pulley 310 to rotate. The second transmission belt 311, under the action of the fourth pulley 310, drives the third pulley 308 to rotate. The third pulley 308 drives the feeding auger to rotate, which in turn drives the second pulley 306 to rotate. The first transmission belt 307, under the action of the second pulley 306, drives the first pulley 303 to rotate. The first pulley 303 drives the mixing frame 302 to rotate. The raw material enters the feeding rack 301 and, under the action of the mixing frame 302, is not... The material is piled up and enters the unloading rack 301, and then enters the weighing box 205 through the feeding auger. When it is necessary to discharge the material, the first motor 207 is driven. The first motor 207 can drive the crank 208 to rotate, the crank 208 can drive the connecting rod 209 to rotate, the connecting rod 209 can drive the tilting frame 203 to drive the rotating shaft 202 to rotate. When the rotating shaft 202 rotates, it can drive the rotating rod 211 to move in the guide frame 210, which can stabilize the tilting frame 203 when it is tilted. The tilting frame 203 can drive the weighing box 205 to rotate, and then the material in the weighing box 205 is discharged through the discharge pipe 206.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metering and weighing device for concrete production, comprising a frame (1), characterized in that: The frame (1) is provided with a weighing structure (2) and a feeding structure (3). The weighing structure (2) includes a fixed frame (201), a rotating shaft (202) is movably mounted on the fixed frame (201), a tilting frame (203) is mounted on the rotating shaft (202), a weighing device (204) is mounted on the tilting frame (203), a weighing box (205) is mounted on the tilting frame (203), a discharge pipe (206) is mounted on the weighing box (205), a first motor (207) is mounted on the fixed frame (201), a crank (208) is mounted on the drive end of the first motor (207), a connecting rod (209) is movably mounted on the crank (208) and the connecting rod (209) is movably connected to the tilting frame (203), a guide frame (210) is mounted on the fixed frame (201), a rotating rod (211) is mounted on the rotating shaft (202) and the rotating rod (211) is adapted to the guide frame (210).

2. The metering and weighing device for concrete production according to claim 1, characterized in that: The frame (1) is provided with legs, and the tilting frame (203) is provided with reinforcing ribs.

3. The metering and weighing device for concrete production according to claim 1, characterized in that: The rotating shaft (202) is adapted to the fixed frame (201), and the guide frame (210) is adapted to the rotating rod (211).

4. A metering and weighing device for concrete production according to claim 1, characterized in that: The feeding structure (3) includes a feeding rack (301), which is mounted on the frame (1). A stirring rack (302) is movably mounted on the feeding rack (301). A first pulley (303) is mounted on the stirring rack (302). A discharge rack (304) is mounted on the feeding rack (301). A discharge auger (305) is movably mounted inside the discharge rack (304). A second pulley (306) is mounted on the discharge auger (305). A first transmission belt (307) is mounted on the first pulley (303) and the second pulley (306). A third pulley (308) is mounted on the discharge auger (305). A second motor (309) is mounted on the frame (1). A fourth pulley (310) is mounted on the drive end of the second motor (309). A second transmission belt (311) is mounted on the third pulley (308) and the fourth pulley (310).

5. A metering and weighing device for concrete production according to claim 4, characterized in that: The unloading rack (301) is provided with a unloading hopper, and the first motor (207) is fixed to the fixed frame (201) by bolts.

6. A metering and weighing device for concrete production according to claim 4, characterized in that: The mixing rack (302) is adapted to the feeding rack (301), and the second motor (309) is fixed to the frame (1) by bolts.

7. A metering and weighing device for concrete production according to claim 4, characterized in that: The discharge pipe (206) is equipped with a discharge valve, and the unloading rack (301) is equipped with reinforcing ribs.

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