Unmanned weighing and intelligent receiving system for concrete raw materials

Abstract

The invention belongs to the related technical field of concrete, and relates to a concrete raw material unmanned weighing and intelligent material receiving system which comprises a discharging bin and a material receiving main body, the material receiving main body is arranged on the left side of the discharging bin, and the material receiving main body is used for carrying out material receiving treatment on discharged raw materials; infrared sensing assemblies are installed on the front wall and the rear wall of the right side of the discharging bin, the lifting mechanism acts on the bottom of a limiting frame, the outer side of the limiting frame is slidably arranged in the left side of the discharging bin, the limiting frame abuts against rear wheels of a truck, and position movement during raw material pouring is avoided. The infrared sensing assembly is used for accurately detecting the in-out state of a truck, the whole structure achieves intelligent response through hydraulic transmission and mechanical linkage, the whole process of weighing, limiting, material receiving and resetting can be completed without manual intervention, the material receiving efficiency and the matching precision are improved, the operation safety is enhanced, and the working efficiency is improved. And the industrial and intelligent requirements of concrete raw material receiving are met.

Description

Technical Field

[0001] This invention belongs to the field of concrete-related technology, specifically a system for unmanned weighing and intelligent material collection of concrete raw materials. Background Technology

[0002] Concrete raw materials mainly include cement, sand, gravel, fly ash and admixtures. The accuracy of their proportions directly affects the strength of concrete and the safety of the project. Traditional methods rely heavily on manual operation. For example, when receiving materials, it is necessary to manually register vehicle information and check documents. When weighing, it is necessary to operate the weighbridge on-site and record the data.

[0003] This process suffers from inefficiency and error-proneness: queuing is required for weighing, form filling is time-consuming, and data deviations are easily caused by clerical or calculation errors. To address these issues, we can refer to the unmanned material receiving and selling system and working method for concrete mixing plants disclosed in existing technology (Chinese patent application number CN202211411895.9, application date 2022-11-11). This system supports unmanned material receiving and selling operations for concrete mixing plants; entry and exit operations are automatically controlled by the system, ensuring fairness and efficiency; the entire weighing process is recorded, and traceability is ensured through image capture and video recording; vehicle operation is guided in a timely manner through voice, LED screen playback, and WeChat messages, improving the user experience; the system enables data sharing among multiple weighbridges and collaborative work among multiple personnel; we can also refer to the existing technology disclosed in existing technology (Chinese patent application number CN202411337481.5, application date 2024-09-25). An automatic weighing method and system for a concrete mixing plant is disclosed. The entire system achieves full automation from information collection to vehicle handling, silo allocation, card management, and weighbridge printing, greatly reducing labor costs and the risk of human error. It automatically allocates raw material silos, rationally arranging them according to vehicle type and actual needs, improving silo utilization and avoiding resource waste. It also includes functions such as an automatic card issuer and silo reminder. Finally, referring to existing technology (Chinese patent application number CN202220942230.X, application date 2022-04-22), an automatic weighing and discharging control device for concrete product raw materials is disclosed. This device rotates a baffle, causing a support on one side of the baffle to align with a card holder. During the alignment process, the positioning block is compressed and moves into the telescopic groove, compressing a spring. When the support reaches the designated position, the spring loses pressure and resets, pushing the positioning block to align with the positioning hole, thus restricting the baffle. The baffle protects the display controller and control switch, thus providing a protective structure for the control device.

[0004] Although the above-mentioned device can be convenient for recording during use, it still has some shortcomings. When the truck is unloading materials, the truck bed will tilt and lift. Due to the change in weight, the vehicle is very likely to move, which will cause the goods to pile up and become scattered.

[0005] Therefore, we proposed that an unmanned weighing and intelligent material receiving system for concrete raw materials can effectively solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an unmanned weighing and intelligent material receiving system for concrete raw materials, in order to solve the problem mentioned in the background art that when trucks are unloading materials, the truck bed will tilt and lift, and due to the change in weight, the vehicle is very likely to move, resulting in the accumulation and scattering of goods.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An unmanned weighing and intelligent receiving system for concrete raw materials includes a feeding hopper and a receiving body. The receiving body is located on the left side of the feeding hopper and is used to collect the raw materials after feeding. Infrared sensing components are installed on the front and rear walls of the right side of the feeding hopper. Weighbridge bodies are installed on both sides of the interior of the feeding hopper. Several sets of electric push rods are fixed on both sides of the inner wall of the feeding hopper. The actuator of each electric push rod is fixed to one side of a protective frame. Two adjacent sets of protective frames are fixed together by a connecting plate. A rotating shaft is fixed on the inner side of the connecting plate, and an adjustment mechanism is provided on one side of the rotating shaft. The actuator of the regulating mechanism acts on the inner wall of the sealing oil chamber. The outer side of the sealing oil chamber is connected to the inner wall of the feeding bin by bolts. The actuator of the regulating mechanism enables the hydraulic oil inside the sealing oil chamber to be transported through the conveying pipe. The other end of the conveying pipe on the right side is connected to the tilting mechanism. The actuator of the tilting mechanism acts on the end of the tilting block. The tilting block tilts to abut against the front wheels of the truck. The conveying pipe on the left side is connected to the lifting mechanism. The lifting mechanism acts on the bottom of the limiting frame. The outer side of the limiting frame is slidably set inside the left side of the feeding bin to abut against the rear wheels of the truck, preventing movement at the location where the raw material is dumped.

[0009] As a preferred technical solution of this application, the adjusting mechanism includes a movable rod rotatably connected to the outside of the rotating shaft, the other end of the movable rod being rotatably disposed on one side of the extrusion plate, a piston being fixed at the rear side of the extrusion plate, and the outer side of the piston being slidably disposed inside the sealing oil cavity.

[0010] As a preferred technical solution of this application, a rubber ring is nested on the outer side of the piston component, the outer side of the rubber ring is attached to the inner side of the sealing oil cavity, the inner side of the sealing oil cavity is filled with hydraulic oil, and the bottom of the sealing oil cavity is connected to the delivery pipeline.

[0011] As a preferred technical solution of this application, the flipping mechanism includes a receiving tube connected to the right conveying pipe. The receiving tube is located inside the feeding hopper. The inside of the receiving tube is connected to the first piston rod through a return spring. The other end of the first piston rod is fixed to the end of the connecting rack. The outer side of the connecting rack is engaged with the bottom of the rotating rack. The center of the rotating rack is fixed to the end of the tilting block.

[0012] As a preferred technical solution of this application, the rotation range of the tilting block is 0-90 degrees, and the top position of the tilting block is set as an inclined surface for the movement of the truck.

[0013] As a preferred technical solution of this application, the lifting mechanism includes a fixed oil cylinder connected to the conveying pipe on the left side. The bottom of the fixed oil cylinder is fixed to the inside of the feeding hopper. The inside of the fixed oil cylinder is connected to the second piston rod through a connecting spring. The top of the second piston rod is fixed to the inside of the limiting frame.

[0014] As a preferred technical solution of this application, the limiting frame is shaped like the number "7", and the limiting frame forms a sliding structure with the inner side of the feeding bin through the second piston rod.

[0015] As a preferred technical solution of this application, the infrared sensing component includes an infrared transmitter and an infrared receiver, which are symmetrically installed at corresponding positions on the front and rear walls of the right side of the unloading hopper. When the truck enters the unloading area and triggers the detection signal of the infrared sensing component, the infrared sensing component can send a start signal to the weighbridge body to control the weighbridge body to start weighing, and at the same time send a pre-action signal to the electric push rod to put the electric push rod in a ready-to-start state.

[0016] As a preferred technical solution of this application, the weighbridge body is electrically connected to an external control system, which can transmit weighing data to the external control system in real time.

[0017] As a preferred technical solution of this application, an auxiliary weighing sensor is also provided inside the receiving body. The data of the auxiliary weighing sensor and the weighbridge body are mutually verified to ensure the accuracy of the weight of the concrete raw materials received. In addition, after the raw material is transported, the infrared sensing component can detect whether the truck has left the unloading area. If the truck leaves, it will trigger the limit frame reset and the tilt block reset.

[0018] Compared with existing technologies, the beneficial effects of this invention are as follows: This unmanned weighing and intelligent material collection system for concrete raw materials uses infrared sensors to accurately detect the entry and exit of trucks, triggering the weighbridge to automatically start weighing and transmit data to an external control system. Combined with auxiliary weighing sensors on the material collection unit, data is double-verified, completely eliminating manual registration and operation processes, significantly reducing data errors and queuing time. Regarding the displacement problem when trucks tilt during unloading, the system uses an electric push rod linkage adjustment mechanism to drive hydraulic oil in the sealed oil chamber through a delivery pipeline to drive a tilting mechanism and a lifting mechanism, causing the tilting block to contact the front wheels of the truck, and the "7"-shaped limit frame to slide and lift to contact the rear wheels, forming a bidirectional fixation, effectively preventing the raw materials from accumulating and scattering. Simultaneously, after the truck leaves, the infrared sensor trigger mechanism automatically resets, ensuring the continuity of cyclical operations. The overall structure achieves intelligent response through hydraulic transmission and mechanical linkage, completing the entire process of weighing, limiting, collecting, and resetting without manual intervention. This improves collection efficiency and proportioning accuracy, enhances operational safety, and meets the industrial and intelligent needs of concrete raw material collection. Specific details are as follows:

[0019] 1. The piston is driven by an electric push rod to squeeze the hydraulic oil in the sealing oil chamber, and the tilting block is flipped and the limit frame is raised simultaneously to form a stable limit on the front and rear wheels of the truck. This design accurately solves the problem of displacement caused by the tilting of the truck body and changes in weight when the truck is unloading materials, ensuring that the material dumping process is stable and orderly, avoiding material spillage and waste and operational safety hazards, and significantly improving the stability and reliability of the material collection process.

[0020] 2. The intelligent triggering logic of the infrared sensing component enables automated linkage between weighing and mechanism actions, completing processes such as truck detection, weighing start-up, limit switch preparation, and data transmission without manual operation. The two-way data verification between the weighbridge body and auxiliary weighing sensors, coupled with real-time data upload, ensures the accuracy of weighing data and the traceability of material receiving data. This significantly reduces errors and labor intensity associated with manual registration and calculation, provides data support for precise control of concrete raw material proportions, and improves the overall intelligence level of the production process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 This is a side view of the structure of the present invention;

[0023] Figure 3 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0024] Figure 4 This is a partial top view of the material hopper structure of the present invention;

[0025] Figure 5 This is a side view of the protective frame structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the main cross-sectional structure of the sealing oil cavity of the present invention;

[0027] Figure 7 This is a schematic diagram of the main cross-sectional structure of the receiving tube of the present invention;

[0028] Figure 8 This is a side view of the limiting frame structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the main cross-sectional structure of the fixed oil cylinder of the present invention.

[0030] In the diagram: 1. Feeding bin; 2. Receiving body; 3. Infrared sensor assembly; 4. Weighbridge body; 5. Electric push rod; 6. Protective frame; 7. Connecting plate; 8. Rotating shaft; 9. Movable rod; 10. Extrusion plate; 11. Piston; 12. Sealing oil chamber; 13. Conveying pipe; 14. Receiving pipe; 15. Return spring; 16. First piston rod; 17. Connecting rack; 18. Rotating rack; 19. Inclined block; 20. Fixed oil cylinder; 21. Connecting spring; 22. Second piston rod; 23. Limiting frame. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-9 The present invention provides the following technical solution: an unmanned weighing and intelligent material collection system for concrete raw materials.

[0033] Example 1: To address the issue of cargo accumulation and scattering caused by the tilting and lifting of the truck bed during unloading, which can easily lead to vehicle movement due to weight changes, please refer to the attached document. Figure 1 -Appendix Figure 5 Appendix Figure 8 and attached Figure 9The left-side conveying pipe 13 is connected to the lifting mechanism, which acts on the bottom of the limiting frame 23. The outer side of the limiting frame 23 is slidably positioned inside the left side of the unloading hopper 1, so that the limiting frame 23 abuts against the rear wheels of the truck, preventing the material from tipping over and shifting its position. The adjusting mechanism includes a movable rod 9 rotatably connected to the outer side of the rotating shaft 8. The other end of the movable rod 9 is rotatably positioned on one side of the extrusion plate 10. A piston 11 is fixed to the rear side of the extrusion plate 10. The outer side of the piston 11 is slidably positioned inside the sealing oil chamber 12. A rubber ring is nested on the outer side of the piston 11. The outer side of the cylinder is attached to the inner side of the sealing oil cavity 12, which is filled with hydraulic oil. The bottom of the sealing oil cavity 12 is connected to the conveying pipe 13. The lifting mechanism includes a fixed oil cylinder 20 connected to the left conveying pipe 13. The bottom of the fixed oil cylinder 20 is fixed to the inner side of the feeding bin 1. The inner side of the fixed oil cylinder 20 is connected to the second piston rod 22 through a connecting spring 21. The top of the second piston rod 22 is fixed to the inner side of the limiting frame 23. The limiting frame 23 is shaped like a "7". The limiting frame 23 forms a sliding structure with the inner side of the feeding bin 1 through the second piston rod 22.

[0034] After the truck enters the unloading area along the inclined block 19, the system triggers the adjustment mechanism to start. In the adjustment mechanism, the movable rod 9, which is rotatably connected to the outer side of the rotating shaft 8, rotates around the rotating shaft 8, causing the extrusion plate 10, which is rotatably connected to the other end of the movable rod 9, to move synchronously. The piston 11, which is fixed to the rear side of the extrusion plate 10, moves along with it. The rubber ring nested on the outer side of the piston 11 tightly fits the inner side of the sealing oil cavity 12 to ensure that the sealing oil cavity 12 is sealed. When the piston 11 slides in the sealing oil cavity 12, the hydraulic oil filled in the extrusion cavity is conveyed to the left lifting mechanism and the right tilting mechanism respectively through the conveying pipe 13 connected to the bottom of the sealing oil cavity 12. The left conveying pipe 13 delivers hydraulic oil to the lifting mechanism's associated components, driving the limit frame 23 to slide and lift along the left side of the unloading bin 1 until the limit frame 23 touches the rear wheel of the truck. The right conveying pipe 13 delivers hydraulic oil to the receiving tube 14 of the tilting mechanism. The hydraulic oil pushes the first piston rod 16 in the receiving tube 14 to move against the elastic force of the return spring 15. The first piston rod 16 drives the connecting rack 17 fixed at the end to translate. The connecting rack 17 meshes with the rotating rack 18, causing the inclined block 19 fixed at the center of the rotating rack 18 to tilt until the inclined block 19 touches the front wheel of the truck, preventing the vehicle from moving by limiting the front and rear wheels.

[0035] Example 2: To facilitate preventing trucks from entering from behind, please refer to the attached document. Figure 1 -Appendix Figure 7Several sets of electric push rods 5 are fixed on both sides of the inner wall of the feeding hopper 1. The actuating end of the electric push rod 5 is fixed on one side of the protective frame 6. Two adjacent sets of protective frames 6 are fixed together by a connecting plate 7. A rotating shaft 8 is fixed on the inner side of the connecting plate 7. An adjusting mechanism is set on one side of the rotating shaft 8. The actuating end of the adjusting mechanism acts on the inner wall of the sealing oil chamber 12. The outer side of the sealing oil chamber 12 is connected to the inner wall of the feeding hopper 1 by bolts. The actuating end of the adjusting mechanism enables the hydraulic oil inside the sealing oil chamber 12 to be transported through the conveying pipe 13. The other end of the right conveying pipe 13 is connected to the tilting mechanism. The actuating end of the tilting mechanism acts on the tilting mechanism. At the end of the inclined block 19, the tilting block 19 flips to abut against the front wheels of the truck; the tilting mechanism includes a receiving pipe 14 connected to the right conveying pipe 13, the receiving pipe 14 is located inside the unloading bin 1, the inside of the receiving pipe 14 is connected to the first piston rod 16 through a return spring 15, the other end of the first piston rod 16 is fixed to the end of the connecting rack 17, the outer side of the connecting rack 17 is engaged with the bottom of the rotating rack 18, the center of the rotating rack 18 is fixed at the end of the inclined block 19; the rotation range of the inclined block 19 is 0-90 degrees, and the top of the inclined block 19 is set as an inclined surface for the movement of the truck.

[0036] After the truck enters the designated unloading position, several sets of electric push rods 5 fixed on both sides of the inner wall of the unloading bin 1 are activated. The actuator of the electric push rod 5 pushes the protective frame 6 fixed on one side to move towards the truck. Since the two sets of adjacent protective frames 6 are fixed by the connecting plate 7, the protective frame 6 drives the connecting plate 7 to move synchronously. The rotating shaft 8 fixed on the inner side of the connecting plate 7 rotates together with the connecting plate 7. The rotation of the rotating shaft 8 triggers the action of the adjustment mechanism, so that the movable rod 9 drives the piston 11 to slide in the sealed oil chamber 12, squeezing the hydraulic oil in the sealed oil chamber 12. The hydraulic oil is delivered to the right tilting mechanism and the left lifting mechanism through the conveying pipe 13 respectively. The right-side conveying pipe 13 sends hydraulic oil into the receiving pipe 14, pushing the first piston rod 16 and the connecting rack 17 to move. Through the meshing of the rack, the tilting block 19 is driven to flip and abut against the front wheel of the current truck. The left-side conveying pipe 13 sends hydraulic oil into the fixed oil cylinder 20. The hydraulic oil pushes the second piston rod 22 in the fixed oil cylinder 20 to move upward against the elastic force of the connecting spring 21. The limiting frame 23 fixed at the top of the second piston rod 22 slides and rises along the inner side of the unloading bin 1 until it abuts against the rear wheel of the current truck. At the same time, the protective frame 6 pushed by the electric push rod 5 unfolds, forming a physical barrier behind the current truck to prevent subsequent trucks from accidentally entering.

[0037] Example 3: To facilitate the verification of load-bearing capacity, please refer to the appendix. Figure 1 Appendix Figure 2 and attached Figure 4The system includes a feeding hopper 1 and a receiving body 2. The receiving body 2 is located on the left side of the feeding hopper 1 and is used to collect the raw materials after feeding. Infrared sensing components 3 are installed on the front and rear walls of the right side of the feeding hopper 1. The weighbridge body 4 is installed on both sides of the interior of the feeding hopper 1. The infrared sensing components 3 include an infrared transmitter and an infrared receiver, which are symmetrically installed on the corresponding positions of the front and rear walls of the right side of the feeding hopper 1. When a truck enters the feeding area and triggers the detection signal of the infrared sensing components 3, the infrared sensing components 3 can transmit signals to the weighbridge body 4. A start signal is sent to control the weighbridge body 4 to begin weighing, and a pre-action signal is sent to the electric push rod 5 to put the electric push rod 5 into a ready-to-start state. The weighbridge body 4 is electrically connected to the external control system, which can transmit the weighing data to the external control system in real time. An auxiliary weighing sensor is also installed inside the receiving body 2. The data of the auxiliary weighing sensor and the weighbridge body 4 are mutually verified to ensure the accuracy of the weight of the concrete raw materials received. In addition, after the raw material is transported, the infrared sensing component 3 can detect whether the truck has left the unloading area. If the truck leaves, the limit frame 23 and the tilting block 19 are reset.

[0038] Infrared sensor components 3, symmetrically installed on the front and rear walls of the right side of the unloading hopper 1, send a start signal to the weighbridge body 4 installed on both sides inside the unloading area when a truck enters the unloading area. This controls the weighbridge body 4 to begin weighing the truck and its loaded raw materials. Simultaneously, the infrared sensor components 3 send a pre-action signal to the electric push rod 5, putting it in a ready-to-start state. The formal start signal for the electric push rod 5 comes from the weighbridge body 4. After the weighing data of the weighbridge body 4 stabilizes for 3 seconds (a threshold can be set), the external control system sends a start command to the electric push rod 5. The weighbridge body 4 is electrically connected to the external control system, transmitting real-time weighing data to the external control system. Meanwhile, an auxiliary weighing sensor installed inside the receiving body 2 on the left side of the unloading hopper 1 detects the weight of the raw materials entering the receiving body 2 after unloading and transmits the data synchronously to the external control system. The system compares and verifies the two sets of data to ensure accurate receiving weight. The system operates when the weighing data error between the auxiliary weighing sensor and the weighbridge body is ≤ ±0.5%. When the data is valid, it is uploaded; when the error exceeds the threshold, the system issues an alarm signal and suspends the material receiving process; after the raw material is conveyed, the infrared sensor component 3 continuously detects the unloading area. If the truck is detected to have left, the infrared sensor component 3 immediately triggers a reset command to restore the limit frame 23 and the tilt block 19 to their initial state, preparing for the next truck to operate.

[0039] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-manned weighing and intelligent material receiving system for concrete raw materials, comprising a feeding hopper (1) and a receiving body (2), wherein the receiving body (2) is located on the left side of the feeding hopper (1), and the receiving body (2) is used to receive the raw materials after feeding; infrared sensing components (3) are installed on the front and rear walls on the right side of the feeding hopper (1); and a weighbridge body (4) is installed on both sides inside the feeding hopper (1); characterized in that: Several sets of electric push rods (5) are fixed on both sides of the inner wall of the feeding bin (1). The actuating end of the electric push rod (5) is fixed on one side of the protective frame (6). Two adjacent sets of protective frames (6) are fixed together by a connecting plate (7). A rotating shaft (8) is fixed on the inner side of the connecting plate (7). An adjusting mechanism is provided on one side of the rotating shaft (8). The actuating end of the adjusting mechanism acts on the inner wall of the sealing oil cavity (12). The outer side of the sealing oil cavity (12) is connected to the inner wall of the feeding bin (1) by bolts. The actuating end of the adjusting mechanism realizes the sealing oil... Hydraulic oil inside cavity (12) is transported through conveying pipe (13). The other end of the conveying pipe (13) on the right is connected to the tilting mechanism. The execution end of the tilting mechanism acts on the end of the tilting block (19). The tilting block (19) tilts to abut against the front wheel of the truck. The conveying pipe (13) on the left is connected to the lifting mechanism. The lifting mechanism acts on the bottom of the limiting frame (23). The outer side of the limiting frame (23) is slidably set inside the left side of the unloading bin (1) to abut against the rear wheel of the truck and prevent movement at the location where the raw material is dumped.

2. The unmanned weighing and intelligent material receiving system for concrete raw materials according to claim 1, characterized in that: The adjustment mechanism includes a movable rod (9) rotatably connected to the outside of the rotating shaft (8). The other end of the movable rod (9) is rotatably disposed on one side of the extrusion plate (10). A piston (11) is fixed at the rear side of the extrusion plate (10). The outer side of the piston (11) is slidably disposed inside the sealing oil chamber (12).

3. The unmanned weighing and intelligent material receiving system for concrete raw materials according to claim 2, characterized in that: A rubber ring is nested on the outside of the piston (11), and the outside of the rubber ring is attached to the inside of the sealing oil cavity (12). The inside of the sealing oil cavity (12) is filled with hydraulic oil, and the bottom of the sealing oil cavity (12) is connected to the delivery pipe (13).

4. The unmanned weighing and intelligent material receiving system for concrete raw materials according to claim 1, characterized in that: The flipping mechanism includes a receiving tube (14) connected to the right conveying pipe (13). The receiving tube (14) is located inside the feeding hopper (1). The inside of the receiving tube (14) is connected to the first piston rod (16) via a return spring (15). The other end of the first piston rod (16) is fixed to the end of the connecting rack (17). The outer side of the connecting rack (17) is engaged with the bottom of the rotating rack (18). The center of the rotating rack (18) is fixed to the end of the inclined block (19).

5. The unmanned weighing and intelligent material receiving system for concrete raw materials according to claim 4, characterized in that: The tilting block (19) has a rotation range of 0-90 degrees, and the top of the tilting block (19) is set on an inclined surface for the movement of the truck.

6. The unmanned weighing and intelligent material receiving system for concrete raw materials according to claim 1, characterized in that: The lifting mechanism includes a fixed oil cylinder (20) connected to the conveying pipe (13) on the left side. The bottom of the fixed oil cylinder (20) is fixed to the inside of the feeding bin (1). The inside of the fixed oil cylinder (20) is connected to the second piston rod (22) through a connecting spring (21). The top of the second piston rod (22) is fixed to the inside of the limiting frame (23).

7. The unmanned weighing and intelligent material receiving system for concrete raw materials according to claim 6, characterized in that: The limiting frame (23) is shaped like the number "7". The limiting frame (23) forms a sliding structure with the inner side of the feeding bin (1) through the second piston rod (22).

8. The unmanned weighing and intelligent material receiving system for concrete raw materials according to claim 1, characterized in that: The infrared sensing component (3) includes an infrared transmitter and an infrared receiver. The infrared transmitter and the infrared receiver are symmetrically installed on the corresponding positions of the front and rear walls on the right side of the unloading hopper (1). When the truck enters the unloading area and triggers the detection signal of the infrared sensing component (3), the infrared sensing component (3) can send a start signal to the weighbridge body (4) to control the weighbridge body (4) to start weighing, and at the same time send a pre-action signal to the electric push rod (5) to put the electric push rod (5) in a ready-to-start state.

9. The unmanned weighing and intelligent material receiving system for concrete raw materials according to claim 1, characterized in that: The weighbridge body (4) is electrically connected to the external control system, and can transmit the weighing data to the external control system in real time.

10. The unmanned weighing and intelligent material receiving system for concrete raw materials according to claim 1, characterized in that: An auxiliary weighing sensor is also provided inside the receiving body (2). The data of the auxiliary weighing sensor and the weighbridge body (4) are mutually verified to ensure the accuracy of the weight of the concrete raw materials. After the raw material is transported, the infrared sensing component (3) can detect whether the truck has left the unloading area. If the truck leaves, the limit frame (23) and the tilt block (19) will be reset.

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