Automatic protection control method and device for cement bulk machine

Abstract

This invention discloses an automatic protection control method and device for a cement bulk loading machine. The method includes: real-time acquisition of dynamic information such as vehicle position, license plate recognition, height of the telescopic unloading head, valve status, limit switch status, fan status, material height, weighbridge weight, planned weight, and motor load current; guiding vehicle parking and confirming compliance; automatically controlling the descent of the loading machine and the start / stop of the equipment; calculating the difference between the actual weight and the planned weight and the weight change rate; if the weight reaches a preset range, generating a control command to close the valve to achieve automatic weight control; and simultaneously monitoring for motor current fluctuations, abnormal position / height, or communication interruptions to achieve emergency braking and protection against mechanical jamming, rope breakage, and other faults in the cement bulk loading machine. This invention solves the technical problems of low level of automatic control intelligence and poor safety in existing cement bulk loading machines.

Description

Technical Field

[0001] This invention relates to the field of cement loading, and more specifically, to an automatic protection control method and device for a cement bulk loading machine. Background Technology

[0002] Cement bulk loading machines, as key bulk loading and transportation equipment in cement production and logistics, are widely used in cement plants, mixing stations, and ports. Their main function is to automatically load cement from storage silos into bulk transport vehicles via telescopic unloading heads. With the continuous improvement of industrial automation, modern cement bulk loading machines generally adopt electrical control systems to drive the lifting and lowering of the unloading head, control the opening and closing of the discharge valve, and coordinate the operation of the dust removal system. In existing technical solutions, the control logic of bulk loading machines often relies on preset time sequences or simple limit switch signals. Operators typically need to observe on-site or use video monitoring to assist in judging the loading status, achieving semi-automated operation with manual intervention.

[0003] However, in actual operation, traditional cement bulk loading machine control technology has significant limitations. First, existing equipment lacks real-time height detection of the cement bulk loading machine, making it impossible to accurately control the distance between the machine and the cement tanker opening. This easily leads to dust emissions during loading due to the cement bulk loading machine not being lowered properly. Because there is no real-time height detection during operation, serious equipment failures such as mechanical jamming, wire rope breakage, or even motor burnout cannot be promptly addressed, and emergency shutdown of the lifting and lowering commands cannot be initiated. Second, if the loading machine directly lifts the cement after it has reached the pre-loading weight, the cement residue inside the machine will spill onto the tanker and the weighbridge, causing dust pollution. Furthermore, traditional systems lack robust fault self-diagnosis and safety interlock protection mechanisms to handle emergencies such as communication link interruptions and abnormal sensor data, posing significant safety hazards. In summary, existing cement bulk loading machines suffer from low levels of intelligent automatic protection control, poor dust collection efficiency, and inadequate safety.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides an automatic protection control method and device for a cement bulk loading machine, which at least solves the technical problems of low level of automatic control intelligence and poor safety in existing cement bulk loading machines.

[0006] According to one aspect of the present invention, an automatic protection control method for a cement bulk loading machine is provided. The method includes: real-time acquisition of dynamic operating information during the operation of the cement bulk loading machine, wherein the dynamic operating information includes at least vehicle position detection and guidance system information, license plate recognition and all-in-one card system loading information, real-time position and height information of the telescopic unloading head, pneumatic discharge valve status information, electric flow valve opening information, limit switch status information, Roots blower status information, dust collector status information, electric ball valve status information, material height information, truck scale weight information, planned loading weight information, and drive motor load current information; guiding the cement tanker truck to park at the loading position based on the vehicle position detection and guidance system information; confirming the loading compliance of the cement tanker truck based on the license plate recognition and all-in-one card system loading information; and, if the loading compliance is confirmed to meet preset loading compliance requirements, controlling the loading machine to automatically descend to the tank opening position of the cement tanker truck, thereby activating the Roots blower, dust collector, pneumatic discharge valve, and electric flow valve. The system uses a measuring valve to initiate an automatic loading program based on the collected planned loading weight information. It calculates a first numerical comparison result between the truck scale weight value and the planned loading weight value. If the first numerical comparison result reaches a preset weight range, a first control command is generated to complete the automatic weight control loading. This first control command controls the closure of the pneumatic discharge valve and the electric flow valve. The system also calculates the rate of change of the truck scale weight value. If the rate of change exceeds a preset range, the first control command is generated to complete the automatic weight control loading. When the truck scale weight value matches the planned loading weight value and the loading machine rises to its original highest position, a loading completion command is generated to indicate that the vehicle can be removed from the scale. When the truck scale weight value does not match the planned loading weight value and the loading machine does not rise to its original highest position, the generation of the loading completion command is prohibited.

[0007] Furthermore, the above method also includes: when the weight value of the truck scale is greater than the empty threshold of the cement tanker truck, generating a truck scale loading command, thereby controlling the loader to descend and the pneumatic discharge valve to open; when the weight value of the truck scale is less than the empty threshold of the cement tanker truck, generating a truck scale no-loading command, thereby prohibiting the loader from descending and the pneumatic discharge valve from opening.

[0008] Furthermore, the above method also includes one of the following: during the lifting and lowering operation of the telescopic unloading head, the load current information of the drive motor is monitored in real time. If a peak value appears in the load current fluctuation characteristic value in the load current information, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering emergency braking and releasing the lifting and lowering command of the loading machine and the power source operation command of the loading machine; during the lifting and lowering operation of the telescopic unloading head, the real-time position height information and the limit switch status information of the telescopic unloading head are monitored in real time. If the limit switch status information indicates that the limit switch is open and the real-time position in the real-time position height information is... When the height reaches a preset limit threshold, a signal indicating that the telescopic unloading head has reached its rising or falling position is generated. Based on this signal, an emergency brake is triggered and the rising or falling command of the loading machine is released, allowing subsequent loading operations to proceed or a loading completion command to be issued. During the lifting and lowering action of the telescopic unloading head, the real-time position and height information of the telescopic unloading head is monitored in real time. If the real-time position and height information indicates that the telescopic unloading head has not changed according to the rising or falling command for more than a preset number of times, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering an emergency brake and releasing the rising or falling command of the loading machine and the power source operation command of the loading machine.

[0009] Furthermore, the above method also includes: when the weight of bulk cement in the cement tanker reaches the planned loading weight in the planned loading weight information, the loading machine performs a preset number of rising and falling actions, thereby shaking the cement residue in the loading machine into the bulk cement tank of the cement tanker.

[0010] Furthermore, the above method also includes: detecting the communication status between the human-machine interface touch screen and the PLC control system; if a communication interruption is detected between the human-machine interface touch screen and the PLC control system and the communication interruption duration reaches a preset duration, a second control command is issued to stop the loading machine from performing the rising and falling actions and to close the pneumatic feeding valve, wherein the human-machine interface touch screen and the PLC control system are installed in the cement bulk loading machine.

[0011] According to another aspect of the present invention, an automatic protection control device for a cement bulk loading machine is also provided. The device includes: a data acquisition unit, configured to acquire dynamic operating information of the cement bulk loading machine in real time, wherein the dynamic operating information includes at least vehicle position detection and guidance system information, license plate recognition and all-in-one card system loading information, real-time position and height information of the telescopic unloading head, pneumatic discharge valve status information, electric flow valve opening information, limit switch status information, Roots blower status information, dust collector status information, electric ball valve status information, material height information, truck scale weight information, planned loading weight information, and drive motor load current information; and a control unit, configured to guide the cement tanker to park at the loading position based on the vehicle position detection and guidance system information, confirm the loading compliance of the cement tanker based on the license plate recognition and all-in-one card system loading information, and, if the loading compliance meets preset loading compliance requirements, control the loading machine to automatically descend to the tank opening position of the cement tanker, thereby activating the Roots blower, dust collector, pneumatic discharge valve, and electric flow valve, and according to the acquired data. The collected planned loading weight information initiates the automatic loading program; a first calculation unit is used to calculate a first numerical comparison result between the truck scale weight value in the truck scale weight information and the planned loading weight value in the planned loading weight information. If the first numerical comparison result reaches a preset weight value range, a first control command is generated to complete the automatic weight control loading, wherein the first control command is used to control the pneumatic feeding valve and the electric flow valve to close; a second calculation unit is used to calculate the rate of change of the truck scale weight value. If the rate of change exceeds a preset rate of change value range, the first control command is generated to complete the automatic weight control loading; a first generation unit is used to generate a loading completion command indicating that the vehicle can be removed from the scale when the truck scale weight value reaches the planned loading weight value and the loading machine rises to its original highest position. When the truck scale weight value does not reach the planned loading weight value and the loading machine does not rise to its original highest position, the generation of the loading completion command is prohibited.

[0012] Furthermore, the aforementioned device also includes: a second generating unit, used to generate a vehicle weighbridge loading command when the weight value of the truck scale is greater than the empty vehicle threshold of the cement tanker truck, thereby controlling the loader to descend and the pneumatic discharge valve to open; and a third generating unit, used to generate a vehicle weighbridge no loading command when the weight value of the truck scale is less than the empty vehicle threshold of the cement tanker truck, thereby prohibiting the loader from descending and the pneumatic discharge valve from opening.

[0013] Furthermore, the aforementioned device also includes one of the following: a first monitoring unit, configured to monitor the load current information of the drive motor in real time during the lifting and lowering operation of the telescopic unloading head; if a spike value appears in the load current fluctuation characteristic value of the load current information, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering emergency braking and releasing the lifting and lowering command of the loading machine and the power source operation command of the loading machine; a second monitoring unit, configured to monitor the real-time position height information and the limit switch status information of the telescopic unloading head in real time during the lifting and lowering operation of the telescopic unloading head; if the limit switch status information indicates that the limit switch is open and the real-time position height information indicates that the limit switch is open, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering emergency braking and releasing the lifting and lowering command of the loading machine and the power source operation command of the loading machine; and a second monitoring unit, configured to monitor the real-time position height information and the limit switch status information of the telescopic unloading head in real time during the lifting and lowering operation of the telescopic unloading head. When the real-time position height value reaches a preset limit threshold, a signal indicating that the telescopic unloading head has reached its rising or falling position is generated. Based on the signal, an emergency brake is triggered and the rising or falling command of the loading machine is released, thereby proceeding with subsequent loading operations or issuing a loading completion command. The third monitoring unit is used to monitor the real-time position height information of the telescopic unloading head during the lifting and lowering process. If the real-time position height information indicates that the telescopic unloading head has not changed according to the rising or falling command for more than a preset number of times, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering an emergency brake and releasing the rising or falling command of the loading machine and the power source operation command of the loading machine.

[0014] Furthermore, the above-mentioned device also includes: an execution unit, used to perform a preset number of rising and falling actions of the loading machine when the weight of the bulk cement in the cement tanker reaches the planned loading weight in the planned loading weight information, thereby shaking the cement residue in the loading machine into the bulk cement tank of the cement tanker.

[0015] Furthermore, the above-mentioned device also includes: a detection unit, used to detect the communication status between the human-machine interface touch screen and the PLC control system. If a communication interruption is detected between the human-machine interface touch screen and the PLC control system and the communication interruption duration reaches a preset duration, a second control command is issued to stop the loading machine from performing the rising and falling actions and to close the pneumatic feeding valve. The human-machine interface touch screen and the PLC control system are installed in the cement bulk loading machine.

[0016] In this embodiment of the invention, a closed-loop control method based on multi-source dynamic information fusion is adopted. This method collects real-time information from the vehicle position detection and guidance system, license plate recognition and all-in-one card system loading information, real-time position and height information of the telescopic unloading head, status information of the pneumatic discharge valve, opening information of the electric flow valve, status information of the limit switch, status information of the Roots blower, status information of the dust collector, material height information, truck scale weight information, planned loading weight information, and load current information of the drive motor. Based on a preset logic algorithm, the above data is analyzed and compared in real time. This achieves the goal of unmanned automatic operation and comprehensive safety protection for the cement bulk loading machine, thereby significantly improving the intelligence level of the bulk loading machine's control, loading accuracy, and operational safety. This solves the technical problems of low intelligence level and poor safety in existing cement bulk loading machines. In practice, the system first automatically verifies the compliance of loading based on the vehicle's location and license plate recognition information. Only after confirmation is the loading machine allowed to descend and the Roots blower, dust collector, and discharge valve are activated in conjunction, avoiding human error. Subsequently, by calculating the difference between the truck scale weight and the planned loading weight, as well as the weight change rate, if it is found to exceed the preset range, a control command is immediately generated to close the discharge valve, achieving precise automatic weight control and preventing overloading or underloading. Finally, through a strict logical interlocking mechanism, the vehicle is only allowed to leave the scale when the weight meets the standard and the loading machine has fully risen to its original highest position; otherwise, the completion command is prohibited from being generated, effectively preventing vehicle dragging accidents caused by equipment not being reset and comprehensively ensuring loading safety. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a flowchart illustrating an optional automatic protection control method for a cement bulk loading machine according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of an optional automatic protection control device for a cement bulk loading machine according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of an optional automatic protection control device for a cement bulk loading machine according to an embodiment of the present invention. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] Example 1

[0024] According to an embodiment of the present invention, an embodiment of an automatic protection control method for a cement bulk loading machine is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0025] Figure 1 This is a flowchart illustrating an optional automatic protection control method for a cement bulk loading machine according to an embodiment of the present invention, as shown below. Figure 1 As shown, the method includes the following steps:

[0026] Step S102: Real-time collection of dynamic operating information during the operation of the cement bulk loading machine. The dynamic operating information includes at least the vehicle position detection and guidance system information, license plate recognition and all-in-one card system loading information, real-time position and height information of the telescopic unloading head, status information of the pneumatic feeding valve, opening information of the electric flow valve, status information of the limit switch, status information of the Roots blower, status information of the dust collector, status information of the electric ball valve, material height information, truck scale weight information, planned loading weight information, and load current information of the drive motor.

[0027] Step S104: Guide the cement tanker truck to the loading position based on the vehicle position detection and guidance system information; confirm the loading compliance of the cement tanker truck based on the license plate recognition and all-in-one card system loading information; if the loading compliance meets the preset loading compliance requirements, control the loading machine to automatically descend to the tank opening position of the cement tanker truck, and then start the Roots blower, dust collector, pneumatic discharge valve and electric flow valve; start the automatic loading program according to the collected planned loading weight information.

[0028] Step S106: Calculate the first value comparison result between the truck scale weight value in the truck scale weight information and the planned loading weight value in the planned loading weight information. If the first value comparison result reaches the preset weight value range, generate a first control command to complete the automatic weight control loading. The first control command is used to control the pneumatic feeding valve and the electric flow valve to close.

[0029] Step S108: Calculate the rate of change of the truck scale weight value. If the rate of change exceeds the preset range, generate a first control command to complete the automatic weight control loading.

[0030] Step S110: When the truck scale weight value reaches the planned loading weight value and the loading machine rises to its original highest position, a loading completion instruction is generated to indicate that the vehicle is allowed to leave the scale. When the truck scale weight value does not reach the planned loading weight value and the loading machine does not rise to its original highest position, the generation of the loading completion instruction is prohibited.

[0031] In this embodiment of the invention, a closed-loop control method based on multi-source dynamic information fusion is adopted. This method collects real-time information from the vehicle position detection and guidance system, license plate recognition and all-in-one card system loading information, real-time position and height information of the telescopic unloading head, status information of the pneumatic discharge valve, opening information of the electric flow valve, status information of the limit switch, status information of the Roots blower, status information of the dust collector, material height information, truck scale weight information, planned loading weight information, and load current information of the drive motor. Based on a preset logic algorithm, the above data is analyzed and compared in real time. This achieves the goal of unmanned automatic operation and comprehensive safety protection for the cement bulk loading machine, thereby significantly improving the intelligence level of the bulk loading machine's control, loading accuracy, and operational safety. This solves the technical problems of low intelligence level and poor safety in existing cement bulk loading machines. In practice, the system first automatically verifies the compliance of loading based on the vehicle's location and license plate recognition information. Only after confirmation is the loading machine allowed to descend and the Roots blower, dust collector, and discharge valve are activated in conjunction, avoiding human error. Subsequently, by calculating the difference between the truck scale weight and the planned loading weight, as well as the weight change rate, if it is found to exceed the preset range, a control command is immediately generated to close the discharge valve, achieving precise automatic weight control and preventing overloading or underloading. Finally, through a strict logical interlocking mechanism, the vehicle is only allowed to leave the scale when the weight meets the standard and the loading machine has fully risen to its original highest position; otherwise, the completion command is prohibited from being generated, effectively preventing vehicle dragging accidents caused by equipment not being reset and comprehensively ensuring loading safety.

[0032] Optionally, in step S102, after the system starts, it first performs an initialization self-test and then begins real-time collection of various dynamic operating information during the operation of the cement bulk loading machine. In this embodiment, the collected information dimensions cover physical location, equipment status, environmental parameters, and process data. Specifically, it includes:

[0033] Vehicle location and identity information: The vehicle's parking coordinates are obtained through the vehicle location detection and guidance system, and the vehicle's identity and loading plan information are obtained through the license plate recognition and all-in-one card system.

[0034] Mechanical actuator status: Real-time monitoring of the real-time position and height information of the telescopic unloading head (usually provided by an encoder or displacement sensor), the on / off status of the pneumatic discharge valve, the opening information of the electric flow valve, and the status information of the limit switch.

[0035] Auxiliary equipment operating status: Collect operating feedback signals from Roots blowers, dust collectors, and electric ball valves.

[0036] Material and weight data: Acquire information on the height of materials inside the vehicle (optional auxiliary sensors) and, most importantly, the weight information from the truck scale.

[0037] Electrical safety parameters: Real-time acquisition of load current information of the drive motor for subsequent fault diagnosis.

[0038] Optionally, in step S104, after collecting the aforementioned dynamic information, the system enters the logic judgment and control stage: based on the vehicle position detection and guidance system information, the system guides the cement tanker truck to accurately park at the loading position through audible and visual indicators. Subsequently, based on license plate recognition and the loading information from the all-in-one card system, the system automatically verifies the vehicle's loading authority, type, and planned quantity to confirm the compliance of the cement tanker truck's loading. After confirming that the loading compliance meets the preset loading compliance requirements, the system automatically controls the loading machine to descend. When the telescopic unloading head approaches the cement tanker truck's opening position (usually confirmed by a height sensor or limit switch), the system automatically activates peripheral equipment, including starting the Roots blower, starting the dust collector, opening the pneumatic discharge valve, and adjusting the electric flow valve. Based on the collected planned loading weight information, the system initializes the weighing module, starts the automatic loading program, and begins filling the truck with cement.

[0039] Optionally, in step S106, the system calculates in real time the difference between the current weight value in the truck scale weight information and the target weight value in the planned loading weight information, which is the first value comparison result. The system presets an allowable error range, for example: target weight ±50kg. If the difference shrinks to zero and exceeds the preset weight value range, i.e., reaches or exceeds the target weight, the system immediately generates a first control command.

[0040] Optionally, in step S108, in addition to the absolute value, the system also calculates the rate of change of the truck scale weight value, i.e., the weight increment per unit time. If the rate of change value exceeds the preset range, for example, if the rate of change suddenly drops to zero, it may indicate material blockage or fullness; or if the rate of change abnormally spikes, it may indicate a metering malfunction, and the system will also determine it as abnormal.

[0041] Emergency shut-off: When any of the above conditions (absolute weight exceeding the limit or abnormal rate of change) are triggered, the first control command generated is used to immediately control the pneumatic feed valve and electric flow valve to close, cut off the material flow, and prevent overload, overflow or equipment idling.

[0042] Optionally, after executing step S110 and completing the loading operation, the system enters the safety reset and release judgment stage: the system monitors two key states in real time: first, whether the truck scale weight value has reached and matches the planned loading weight value (confirming the operation is complete); second, whether the loading machine has risen to its original highest position (confirming the equipment is reset to avoid scratches). Only when both conditions are met simultaneously, i.e., the weight meets the standard and the equipment is reset, will the system generate a loading completion instruction to indicate that the vehicle is allowed to leave the scale. At this time, the barrier gate opens, and the vehicle can safely drive away. If the truck scale weight value does not reach the planned loading weight value (operation is not completed) and the loading machine has not risen to its original highest position (equipment is not reset), the system strictly prohibits the generation of a loading completion instruction. This logical interlocking mechanism effectively prevents vehicles from leaving accidentally when the unloading head has not been raised or the material is not fully loaded, avoiding quality accidents such as broken hoses, damaged vehicles, or substandard products leaving the factory.

[0043] In summary, through the steps of S102 to S110 described above, this embodiment utilizes real-time weight, position, and status data to replace traditional manual visual inspection and experience-based judgment. This not only achieves full automation of the cement bulk loading process but also significantly improves the safety and reliability of equipment operation through multiple logic checks such as weight difference, rate of change, and position interlocking.

[0044] Optionally, the automatic protection control method of the cement bulk loading machine may further include: when the weight value of the truck scale is greater than the empty threshold of the cement tanker, generating a truck scale loading command, thereby controlling the loading machine to descend and the pneumatic discharge valve to open; when the weight value of the truck scale is less than the empty threshold of the cement tanker, generating a truck scale no-loading command, thereby prohibiting the loading machine from descending and the pneumatic discharge valve from opening.

[0045] Optionally, a safety interlock control method based on the weight threshold of the truck scale is adopted. By collecting the weight information of the truck scale in real time and dynamically comparing it with the preset empty truck threshold of the cement tanker, the purpose of accurately identifying the vehicle's presence status and forcibly restricting the equipment's operating authority is achieved. This achieves the technical effect of preventing the bulk loading machine from operating under no-load conditions or causing materials to spill onto the ground due to malfunctions. This solves the safety hazards caused by sensor false alarms or operational errors in the existing technology. In practice, the system first sets a baseline empty vehicle threshold based on the site conditions. Then, during standby and operation monitoring, it continuously acquires real-time weight values. When the weight value of the truck scale is detected to be greater than the empty vehicle threshold, the system logic determines that the vehicle has arrived and generates a "vehicle loading command" as an enabling condition for equipment startup. This grants control over the loading machine's lowering mechanism and the pneumatic discharge valve, allowing for automatic or manual loading. Conversely, when the weight value of the truck scale is detected to be less than the empty vehicle threshold, the system logic determines that the vehicle has not been loaded or has left the scale. This generates a "vehicle loading command," triggering a safety interlock mechanism. This forcibly prohibits the loading machine from lowering to prevent the unloading head from hitting the ground and locks the pneumatic discharge valve to prevent it from opening and preventing material from being directly discharged onto the scale surface. Through this hard logic constraint based on physical weight feedback, the system ensures that equipment operation is based on the premise of effective vehicle loading, comprehensively protecting the safety and cleanliness of the site working environment.

[0046] Optionally, the automatic protection control method of the cement bulk loading machine may further include one of the following: during the lifting and lowering action of the telescopic unloading head, the load current information of the drive motor is monitored in real time. If a peak value appears in the load current fluctuation characteristic value in the load current information, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering emergency braking and releasing the lifting and lowering command of the loading machine and the power source working command of the loading machine; during the lifting and lowering action of the telescopic unloading head, the real-time position height information and limit switch status information of the telescopic unloading head are monitored in real time. If the limit switch status information indicates that the limit switch is open and the real-time position height information indicates that the limit switch is open, the method may generate a mechanical jamming fault signal or a rope breakage fault signal, thereby triggering emergency braking and releasing the lifting and lowering command of the loading machine and the power source working command of the loading machine; When the real-time position height value reaches the preset limit threshold, a signal indicating that the telescopic unloading head has reached the upper or lower position is generated. Based on the signal, an emergency brake is triggered and the upper or lower command of the loading machine is released, so as to carry out subsequent loading operations or issue a loading completion command. During the lifting and lowering action of the telescopic unloading head, the real-time position height information of the telescopic unloading head is monitored in real time. If the real-time position height information indicates that the telescopic unloading head has not changed according to the upper or lower command beyond the preset number of times threshold, a mechanical jamming fault signal or a rope breakage fault signal is generated, so as to trigger an emergency brake and release the upper or lower command of the loading machine and the power source working command of the loading machine.

[0047] Optionally, by constructing a multi-dimensional fault monitoring model, during the lifting and lowering action of the telescopic unloading head, real-time monitoring and comprehensive judgment are performed from three levels: motor load characteristics, position feedback logic, and limit hardware status. This enables rapid identification and response to sudden faults such as mechanical jamming and rope breakage. The specific execution process is as follows: First, the system collects the load current information of the drive motor driving the lifting and lowering action in real time through a current transformer or Hall sensor, performs digital filtering and feature extraction, and calculates the fluctuation characteristic value of the load current. When a peak value exceeding the normal fluctuation range is detected in the fluctuation characteristic value (usually indicating a severe impact or jamming of the mechanical transmission mechanism), the CPU generates a mechanical jamming fault signal or a rope breakage fault signal, and then triggers an emergency braking program to cut off the lifting and lowering command path of the loading machine and release the power source working command, such as cutting off the motor contactor, so that the equipment stops quickly to prevent motor burnout or structural damage. Secondly, the system simultaneously receives the digital signals from limit switches and reads real-time position and height information from position sensors such as encoders. When the limit switch status information indicates that the limit switch is open, triggering protection, or when the real-time position and height value reaches a preset software limit threshold, the system determines it as an overtravel risk. If both conditions are met simultaneously (hardware and software limits are both confirmed), the system determines it as a mechanical jam or loss of control state, generates the aforementioned fault signal, and performs emergency braking and power source cutoff operations to ensure that the equipment does not overshoot or fall due to inertia. Finally, as a redundant protection mechanism, after issuing a lifting command, the system continuously monitors the changing trend of real-time position and height information. If, within a preset time window, the actual position of the telescopic unloading head does not change as expected according to the command direction, and the number of consecutive occurrences of this abnormal state exceeds a preset threshold (e.g., no displacement in three consecutive samples), it is determined that the actuator is slipping, the rope is broken, or the transmission is failing. The system immediately generates a fault signal and performs emergency braking. Through the above three parallel monitoring logics, this embodiment constructs a three-dimensional safety protection network, which not only solves the blind spot problem of traditional single limit switch protection methods, but also greatly improves the operational reliability and intrinsic safety level of bulk loading machines under complex working conditions through current characteristic identification and position trend analysis.

[0048] Optionally, the automatic protection control method of the cement bulk loading machine may further include: when the weight of bulk cement in the cement tanker reaches the planned loading weight in the planned loading weight information, the loading machine performs a preset number of rising and falling actions, thereby shaking the cement residue in the loading machine into the cement bulk tank of the cement tanker.

[0049] Optionally, to address the material waste and environmental pollution issues that occur at the moment of completion of loading by the cement bulk loading machine, this embodiment utilizes the high-precision weight information collected in step S102. When the real-time weight of the bulk cement in the cement tanker reaches the target value in the planned loading weight information, the power is not immediately and completely cut off. Instead, a special timing control command is generated through the logic control module. Specifically, when the system determines that the actual weight matches the planned weight, the loading machine does not directly stop and reset. Instead, it automatically executes a preset number of micro-rising and falling movements, such as 1 to 3 times. This series of reciprocating movements utilizes the physical principle of mechanical vibration and gravitational potential energy difference to effectively break the adhesion of cement dust (residual dust) adhering to the inner wall and outlet of the telescopic unloading head, transforming it from a solid state to a fluid state. Subsequently, these shaken-off dust particles fall into the bulk cement tanker of the cement tanker that has just finished loading under the action of gravity, rather than scattering outside the vehicle or on the weighbridge. This technology not only maximizes the recovery of remaining materials and ensures the accuracy of delivery measurement, avoiding the risk of short weight or overloading due to dust accumulation, but also significantly reduces on-site dust pollution, eliminates the tedious process of manually cleaning up scattered materials, and achieves a dual improvement in clean production and resource utilization efficiency.

[0050] Optionally, the automatic protection control method of the cement bulk loading machine may further include: detecting the communication status between the human-machine interface touch screen and the PLC control system; if a communication interruption is detected between the human-machine interface touch screen and the PLC control system and the communication interruption duration reaches a preset duration, a second control command is issued to stop the loading machine from performing the rising and falling actions and to close the pneumatic feeding valve, wherein the human-machine interface touch screen and the PLC control system are installed in the cement bulk loading machine.

[0051] Optionally, to address the risk of process control failure due to human-machine interface equipment malfunctions during the automated control of cement bulk loading machines, this embodiment of the invention proposes a redundant protection mechanism based on communication status monitoring. This embodiment establishes real-time diagnostic logic for the data link between the human-machine interface touchscreen and the PLC (Programmable Logic Controller) control system at the system architecture level. Specifically, the system continuously and cyclically detects communication handshake signals or heartbeat packets between the two in the background, monitoring the real-time performance of the communication through a specific timeout judgment algorithm. When a communication interruption is detected between the human-machine interface touchscreen and the PLC control system, and the interruption duration reaches a preset duration (e.g., 3 to 5 seconds to exclude momentary interference), the PLC determines that the upper-level monitoring layer has failed or is in an uncontrolled state. At this time, to prevent the continuation of erroneous instructions caused by operator accidental touch of virtual buttons or interface display delays, the PLC immediately triggers a safety relay and issues a second control command. This command has the highest priority, forcibly stopping the loading machine from performing any upward or downward movements to lock the mechanical position, and simultaneously closing the pneumatic discharge valve to cut off the material flow, thereby placing the equipment in a safe shutdown state. This "stop upon communication timeout" control logic effectively avoids equipment malfunctions or accidents caused by human-machine interface crashes, black screens, or communication blockages. It ensures that even if the upper-level monitoring fails, the lower-level actuators can still be reliably constrained, greatly improving the operational safety and stability of the bulk shipping system.

[0052] Optionally, the human-machine interface touchscreen and PLC control system, as the core control units of the cement bulk loading machine, are typically integrated and installed in an electrical control cabinet on or near the side of the machine body. This control cabinet employs a sealed structure with a protection rating of at least IP54 to resist dust and vibration interference on site. The PLC control system, located inside the cabinet, includes a CPU module, digital / analog I / O modules, and communication interfaces. It connects to peripheral equipment on the bulk loading machine, such as motors, valves, limit switches, and truck scales, via shielded cables. The human-machine interface touchscreen is embedded in the front panel of the control cabinet, facilitating on-site monitoring and touch control by operators. Data exchange between the two is achieved via RS485, Ethernet, or a dedicated communication bus, forming a collaborative architecture where the PLC executes control logic and the touchscreen provides visual operation, ensuring efficient and stable human-machine interaction and automated control in cement bulk loading operations.

[0053] In this embodiment of the invention, a closed-loop control method based on multi-source dynamic information fusion is adopted. This method collects real-time information from the vehicle position detection and guidance system, license plate recognition and all-in-one card system loading information, real-time position and height information of the telescopic unloading head, status information of the pneumatic discharge valve, opening information of the electric flow valve, status information of the limit switch, status information of the Roots blower, status information of the dust collector, material height information, truck scale weight information, planned loading weight information, and load current information of the drive motor. Based on a preset logic algorithm, the above data is analyzed and compared in real time. This achieves the goal of unmanned automatic operation and comprehensive safety protection for the cement bulk loading machine, thereby significantly improving the intelligence level of the bulk loading machine's control, loading accuracy, and operational safety. This solves the technical problems of low intelligence level and poor safety in existing cement bulk loading machines. In practice, the system first automatically verifies the compliance of loading based on the vehicle's location and license plate recognition information. Only after confirmation is the loading machine allowed to descend and the Roots blower, dust collector, and discharge valve are activated in conjunction, avoiding human error. Subsequently, by calculating the difference between the truck scale weight and the planned loading weight, as well as the weight change rate, if it is found to exceed the preset range, a control command is immediately generated to close the discharge valve, achieving precise automatic weight control and preventing overloading or underloading. Finally, through a strict logical interlocking mechanism, the vehicle is only allowed to leave the scale when the weight meets the standard and the loading machine has fully risen to its original highest position; otherwise, the completion command is prohibited from being generated, effectively preventing vehicle dragging accidents caused by equipment not being reset and comprehensively ensuring loading safety.

[0054] Example 2

[0055] According to another aspect of the present invention, an automatic protection control device for a cement bulk loading machine is also provided. Figure 2 This is a schematic diagram of the structure of an optional automatic protection control device for a cement bulk loading machine according to an embodiment of the present invention, as shown below. Figure 2 As shown, the device includes:

[0056] The data acquisition unit 201 is used to collect dynamic operating information during the operation of the cement bulk loading machine in real time. The dynamic operating information includes at least the vehicle position detection and guidance system information, the license plate recognition and all-in-one card system loading information, the real-time position and height information of the telescopic unloading head, the status information of the pneumatic feeding valve, the opening information of the electric flow valve, the status information of the limit switch, the status information of the Roots blower, the status information of the dust collector, the status information of the electric ball valve, the material height information, the weight information of the truck scale, the planned loading weight information, and the load current information of the drive motor.

[0057] The control unit 203 is used to guide the cement tanker truck to the loading position based on the vehicle position detection and guidance system information, confirm the loading compliance of the cement tanker truck based on the license plate recognition and all-in-one card system loading information, and control the loading machine to automatically descend to the tank opening position of the cement tanker truck when the loading compliance is confirmed to meet the preset loading compliance requirements. Then, the Roots blower, dust collector, pneumatic discharge valve and electric flow valve are started, and the automatic loading program is started according to the collected planned loading weight information.

[0058] The first calculation unit 205 is used to calculate the first value comparison result between the truck scale weight value in the truck scale weight information and the planned loading weight value in the planned loading weight information. If the first value comparison result reaches the preset weight value range, a first control command is generated to complete the automatic weight control loading. The first control command is used to control the pneumatic feeding valve and the electric flow valve to close.

[0059] The second calculation unit 207 is used to calculate the rate of change of the weight value on the truck scale. If the range of the rate of change exceeds the preset range, a first control command is generated to complete the automatic weight control loading.

[0060] The first generation unit 209 is used to generate a loading completion instruction to indicate that the vehicle can be removed from the weighbridge when the weighbridge weight value reaches the planned loading weight value and the loading machine rises to its original highest position. When the weighbridge weight value does not reach the planned loading weight value and the loading machine does not rise to its original highest position, the generation of the loading completion instruction is prohibited.

[0061] Optionally, Figure 3 This is a schematic diagram of the structure of another optional automatic protection control device for a cement bulk loading machine according to an embodiment of the present invention, as shown below. Figure 3 As shown, the automatic protection control device of the cement bulk loading machine may further include: a second generating unit 301, used to generate a vehicle weighbridge loading command when the weighbridge weight value is greater than the empty vehicle threshold of the cement tanker, thereby controlling the loading machine to descend and the pneumatic discharge valve to open; and a third generating unit 303, used to generate a vehicle weighbridge no loading command when the weighbridge weight value is less than the empty vehicle threshold of the cement tanker, thereby prohibiting the loading machine from descending and the pneumatic discharge valve from opening.

[0062] Optionally, the automatic protection control device of the cement bulk loading machine may further include one of the following: a first monitoring unit, used to monitor the load current information of the drive motor in real time during the lifting and lowering action of the telescopic unloading head; if a spike value appears in the load current fluctuation characteristic value in the load current information, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering emergency braking and releasing the lifting and lowering command of the loading machine and the power source working command of the loading machine; a second monitoring unit, used to monitor the real-time position height information and limit switch status information of the telescopic unloading head in real time during the lifting and lowering action of the telescopic unloading head; if the limit switch status information indicates that the limit switch is open and the real-time position height information indicates that the limit switch is open, the second monitoring unit may generate an emergency braking signal or a rope breakage fault signal, thereby triggering emergency braking and releasing the lifting and lowering command of the loading machine and the power source working command of the loading machine; When the real-time position height value in the height information reaches the preset limit threshold, a signal indicating that the telescopic unloading head has reached the upper or lower position is generated. Based on the signal indicating that the upper or lower position has reached the position, an emergency brake is triggered and the upper or lower command of the loading machine is released, so as to carry out subsequent loading operations or issue a loading completion command. The third monitoring unit is used to monitor the real-time position height information of the telescopic unloading head in real time during the lifting and lowering action of the telescopic unloading head. If the real-time position height information indicates that the telescopic unloading head has not changed according to the upper or lower command beyond the preset number of times threshold, a mechanical jamming fault signal or a rope breakage fault signal is generated, so as to trigger an emergency brake and release the upper or lower command of the loading machine and the power source working command of the loading machine.

[0063] Optionally, the automatic protection control device of the cement bulk loading machine may further include: an execution unit, used to perform a preset number of rising and falling actions when the weight of bulk cement in the cement tanker reaches the planned loading weight in the planned loading weight information, thereby shaking the cement residue in the loading machine into the cement bulk tank of the cement tanker.

[0064] Optionally, the automatic protection control device of the cement bulk loading machine may further include: a detection unit, used to detect the communication status between the human-machine interface touch screen and the PLC control system. If a communication interruption is detected between the human-machine interface touch screen and the PLC control system and the communication interruption duration reaches a preset duration, a second control command is issued to stop the loading machine from performing the rising and falling actions and to close the pneumatic feeding valve. The human-machine interface touch screen and the PLC control system are installed in the cement bulk loading machine.

[0065] In this embodiment of the invention, a closed-loop control method based on multi-source dynamic information fusion is adopted. This method collects real-time information from the vehicle position detection and guidance system, license plate recognition and all-in-one card system loading information, real-time position and height information of the telescopic unloading head, status information of the pneumatic discharge valve, opening information of the electric flow valve, status information of the limit switch, status information of the Roots blower, status information of the dust collector, material height information, truck scale weight information, planned loading weight information, and load current information of the drive motor. Based on a preset logic algorithm, the above data is analyzed and compared in real time. This achieves the goal of unmanned automatic operation and comprehensive safety protection for the cement bulk loading machine, thereby significantly improving the intelligence level of the bulk loading machine's control, loading accuracy, and operational safety. This solves the technical problems of low intelligence level and poor safety in existing cement bulk loading machines. In practice, the system first automatically verifies the compliance of loading based on the vehicle's location and license plate recognition information. Only after confirmation is the loading machine allowed to descend and the Roots blower, dust collector, and discharge valve are activated in conjunction, avoiding human error. Subsequently, by calculating the difference between the truck scale weight and the planned loading weight, as well as the weight change rate, if it is found to exceed the preset range, a control command is immediately generated to close the discharge valve, achieving precise automatic weight control and preventing overloading or underloading. Finally, through a strict logical interlocking mechanism, the vehicle is only allowed to leave the scale when the weight meets the standard and the loading machine has fully risen to its original highest position; otherwise, the completion command is prohibited from being generated, effectively preventing vehicle dragging accidents caused by equipment not being reset and comprehensively ensuring loading safety.

[0066] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0067] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0068] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0069] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0070] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0071] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0072] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic protection control method for a cement bulk loading machine, characterized in that, include: The system collects dynamic operating information during the operation of the cement bulk loading machine in real time. This dynamic operating information includes at least the vehicle position detection and guidance system information, license plate recognition and all-in-one card system loading information, real-time position and height information of the telescopic unloading head, status information of the pneumatic feeding valve, opening information of the electric flow valve, status information of the limit switch, status information of the Roots blower, status information of the dust collector, status information of the electric ball valve, material height information, weighbridge weight information, planned loading weight information, and load current information of the drive motor. Based on the vehicle position detection and guidance system information, the cement tanker truck is guided to park at the loading position. Based on the license plate recognition and all-in-one card system loading information, the loading compliance of the cement tanker truck is confirmed. If the loading compliance is confirmed to meet the preset loading compliance requirements, the loading machine is controlled to automatically descend to the tank opening position of the cement tanker truck, and then the Roots blower, dust collector, pneumatic discharge valve and electric flow valve are started. The automatic loading program is started according to the collected planned loading weight information. Calculate the first value comparison result between the truck scale weight value in the truck scale weight information and the planned loading weight value in the planned loading weight information. If the first value comparison result reaches a preset weight value range, generate a first control command to complete automatic weight control loading. The first control command is used to control the pneumatic feeding valve and the electric flow valve to close. Calculate the rate of change of the truck scale weight value. If the rate of change exceeds the preset range, generate the first control command to complete automatic weight control loading. When the weighbridge weight reaches the planned loading weight and the loading machine rises to its original highest position, a loading completion command is generated to indicate that the vehicle can be removed from the weighbridge. When the weighbridge weight does not reach the planned loading weight and the loading machine does not rise to its original highest position, the loading completion command is not generated.

2. The automatic protection control method for a cement bulk loading machine according to claim 1, characterized in that, The method further includes: When the weight value of the truck scale is greater than the empty vehicle threshold of the cement tanker, a vehicle weighbridge loading command is generated, thereby controlling the loader to descend and the pneumatic unloading valve to open. When the weight value of the truck scale is less than the empty vehicle threshold of the cement tanker, a vehicle scale no-loading command is generated, thereby prohibiting the loading machine from descending and the pneumatic unloading valve from opening.

3. The automatic protection control method for a cement bulk loading machine according to claim 1, characterized in that, The method further includes one of the following: During the lifting and lowering action of the telescopic unloading head, the load current information of the drive motor is monitored in real time. If a peak value appears in the load current fluctuation characteristic value in the load current information, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering emergency braking and releasing the lifting and lowering command of the loading machine and the power source working command of the loading machine. During the lifting and lowering process of the telescopic unloading head, the real-time position height information and the limit switch status information of the telescopic unloading head are monitored in real time. When the limit switch status information indicates that the limit switch is open and the real-time position height value in the real-time position height information reaches the preset limit threshold, a signal for the telescopic unloading head to rise or fall to the correct position is generated. Based on the signal for the telescopic unloading head to rise or fall to the correct position, emergency braking is triggered and the rising and falling command of the loading machine is released, thereby proceeding with subsequent loading operations or issuing a loading completion command. During the lifting and lowering process of the telescopic unloading head, the real-time position and height information of the telescopic unloading head is monitored in real time. If the real-time position and height information indicates that the telescopic unloading head has not changed according to the rising or falling command for more than a preset number of times, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering emergency braking and releasing the rising and falling command of the loading machine and the power source working command of the loading machine.

4. The automatic protection control method for a cement bulk loading machine according to claim 1, characterized in that, The method further includes: When the weight of bulk cement in the cement tanker truck reaches the planned loading weight value in the planned loading weight information, the loading machine performs a preset number of rising and falling actions, thereby shaking the cement residue in the loading machine into the bulk cement tank of the cement tanker truck.

5. The automatic protection control method for a cement bulk loading machine according to claim 1, characterized in that, The method further includes: The communication status between the human-machine interface touch screen and the PLC control system is detected. If a communication interruption is detected between the human-machine interface touch screen and the PLC control system and the communication interruption duration reaches a preset duration, a second control command is issued to stop the loading machine from performing the rising and falling actions and to close the pneumatic feeding valve. The human-machine interface touch screen and the PLC control system are installed in the cement bulk loading machine.

6. An automatic protection and control device for a cement bulk loading machine, characterized in that, include: The data acquisition unit is used to collect dynamic operating information during the operation of the cement bulk loading machine in real time. The dynamic operating information includes at least the vehicle position detection and guidance system information, the license plate recognition and all-in-one card system loading information, the real-time position and height information of the telescopic unloading head, the status information of the pneumatic feeding valve, the opening information of the electric flow valve, the status information of the limit switch, the status information of the Roots blower, the status information of the dust collector, the status information of the electric ball valve, the material height information, the weight information of the truck scale, the planned loading weight information, and the load current information of the drive motor. The control unit is used to guide the cement tanker truck to the loading position based on the vehicle position detection and guidance system information, confirm the loading compliance of the cement tanker truck based on the license plate recognition and all-in-one card system loading information, and, if the loading compliance is confirmed to meet the preset loading compliance requirements, control the loading machine to automatically descend to the tank opening position of the cement tanker truck, and then start the Roots blower, dust collector, pneumatic discharge valve and electric flow valve, and start the automatic loading program according to the collected planned loading weight information; The first calculation unit is used to calculate a first numerical comparison result between the truck scale weight value in the truck scale weight information and the planned loading weight value in the planned loading weight information. If the first numerical comparison result reaches a preset weight value range, a first control command is generated to complete automatic weight control loading. The first control command is used to control the pneumatic feeding valve and the electric flow valve to close. The second calculation unit is used to calculate the rate of change of the weight value on the truck scale. If the range of the rate of change exceeds the preset range, the first control command is generated to complete the automatic weight control loading. The first generation unit is configured to generate a loading completion instruction indicating that the vehicle can be removed from the weighbridge when the weighbridge weight value reaches the planned loading weight value and the loading machine rises to its original highest position; and to prohibit the generation of the loading completion instruction when the weighbridge weight value does not reach the planned loading weight value and the loading machine does not rise to its original highest position.

7. The automatic protection and control device for a cement bulk loading machine according to claim 6, characterized in that, The device further includes: The second generation unit is used to generate a vehicle weighbridge loading command when the weight value of the truck scale is greater than the empty vehicle threshold of the cement tanker truck, thereby controlling the loader to descend and the pneumatic unloading valve to open. The third generation unit is used to generate a vehicle scale no loading command when the weight value of the truck scale is less than the empty vehicle threshold of the cement tanker truck, thereby prohibiting the loading machine from descending and the pneumatic unloading valve from opening.

8. The automatic protection and control device for a cement bulk loading machine according to claim 6, characterized in that, The device also includes one of the following: The first monitoring unit is used to monitor the load current information of the drive motor in real time during the lifting and lowering action of the telescopic unloading head. If a peak value appears in the load current fluctuation characteristic value in the load current information, a mechanical jamming fault signal or a rope breakage fault signal is generated, thereby triggering emergency braking and releasing the lifting and lowering command of the loading machine and the power source working command of the loading machine. The second monitoring unit is used to monitor the real-time position height information and the limit switch status information of the telescopic unloading head in real time during the lifting and lowering action of the telescopic unloading head. When the limit switch status information indicates that the limit switch is open and the real-time position height value in the real-time position height information reaches the preset limit threshold, the unit generates a signal that the telescopic unloading head has reached the lifting or lowering position. Based on the signal, the unit triggers emergency braking and releases the lifting and lowering command of the loading machine, thereby carrying out subsequent loading operations or issuing a loading completion command. The third monitoring unit is used to monitor the real-time position and height information of the telescopic unloading head during the lifting and lowering process. If the real-time position and height information indicates that the telescopic unloading head has not changed according to the rising or falling command for more than a preset number of times, the unit generates the mechanical jamming fault signal or the rope breakage fault signal, thereby triggering emergency braking and releasing the rising and falling command of the loading machine and the power source working command of the loading machine.

9. The automatic protection and control device for a cement bulk loading machine according to claim 6, characterized in that, The device further includes: The execution unit is used to, when the weight of bulk cement in the cement tanker reaches the planned loading weight in the planned loading weight information, have the loading machine perform a preset number of rising and falling actions, thereby shaking the cement residue in the loading machine into the bulk cement tank of the cement tanker.

10. The automatic protection and control device for a cement bulk loading machine according to claim 6, characterized in that, The device further includes: The detection unit is used to detect the communication status between the human-machine interface touch screen and the PLC control system. If a communication interruption is detected between the human-machine interface touch screen and the PLC control system and the communication interruption duration reaches a preset duration, a second control command is issued to stop the loading machine from performing the rising and falling actions and to close the pneumatic feeding valve. The human-machine interface touch screen and the PLC control system are installed in the cement bulk loading machine.

Images