Safety protection control devices and methods for unloading gates, waste bins and waste-to-energy plants

Abstract

This application discloses a safety protection control device and method for an unloading gate, a waste bin, and a waste-to-energy plant. The waste bin, used in a waste-to-energy plant, has a ground-opening unloading gate installed on one side, which is opened and closed by a hydraulic cylinder. It includes two movable door protective covers, with a door body slidably connected inside each cover. A drive chamber is installed inside each cover, containing a servo motor and a ball screw. Two human body sensors are fixedly installed on the surfaces of the two movable door protective covers, and laser sensors are fixedly installed on the bottom and side surfaces of both covers. A vehicle sensor is fixedly installed on the protruding edge of the waste bin. By setting up an intelligent control device, the coordinated operation of the human body sensors, vehicle sensors, and laser sensors can accurately identify the status of the unloading vehicle, avoiding ineffective opening or closing of the gate due to misjudgment.

Description

Technical Field

[0001] This application belongs to the technical field of unloading gate control in waste-to-energy plants, specifically relating to a safety protection control device and method for unloading gates, a waste storage bin, and a waste-to-energy plant. Background Technology

[0002] During the production process at a waste-to-energy plant, if the unloading gate cannot be closed in time during unloading, sanitation workers may have to approach the unloading opening, posing a significant safety hazard.

[0003] Existing garbage unloading gates often use a mechanical hydraulic drive mode. Due to the inherent lag in the hydraulic circuit's pressure establishment and power transmission, the opening and closing process of the gate is slow. During this process, sanitation workers may approach the unloading port while cleaning garbage, threatening personnel safety and disrupting safe production. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this application provides a safety protection control device and method for unloading gates, waste bins and waste-to-energy plants, to ensure the safety of personnel and equipment and maximize the goal of safe production.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A safety protection and control device for a discharge gate is provided for a waste storage bin in a waste-to-energy plant. A ground-opening discharge gate is installed on one side of the waste storage bin, and the gate is opened and closed by a hydraulic cylinder. The device includes two movable door protective covers, with a door body slidably connected inside each cover. A drive chamber is installed inside each cover, containing a servo motor and a ball screw. Two human body sensors are fixedly installed on the surfaces of the two movable door protective covers, and laser sensors are fixedly installed on the bottom side surfaces of both covers. A vehicle sensor is fixedly installed on the protruding edge surface of the waste storage bin.

[0007] As a preferred embodiment, a controller is fixedly installed on one side surface of the protective cover, and the controller contains a PLC controller and an audible and visual alarm.

[0008] As a preferred embodiment, both the vehicle sensor and the human body sensor are electrically connected to the PLC controller inside the controller.

[0009] As a preferred embodiment, the PLC controller inside the controller is electrically connected to the servo motor inside the drive compartment, and the forward and reverse rotation of the servo motor and the speed of the servo motor are controlled by pulse signals.

[0010] As a preferred embodiment, the door body is fixedly connected to the ball screw and nut pair in the drive compartment, and the servo motor drives the ball screw to rotate, thereby driving the door body to perform opening and closing actions.

[0011] As a preferred embodiment, the vehicle sensor and the human body sensor are interlocked, and the vehicle sensor and the human body sensor are electrically connected to the PLC controller.

[0012] As a preferred option, the servo motor has a power of 1.5kW, a speed of 3000r / min, a response time of ≤0.1s, a ball screw pitch of 10mm, and a transmission efficiency of ≥90%.

[0013] In addition, this application also provides a waste bin, including a discharge door and a discharge door safety protection control device as described above.

[0014] In addition, this application also provides a waste-to-energy plant, including the waste storage area described above.

[0015] In addition, this application also provides a safety protection control method for a discharge gate, which employs the discharge gate safety protection control device described above, including:

[0016] When the unloading vehicle approaches the unloading area, the vehicle sensors detect the approach of the vehicle, while the laser sensors on both sides scan the outline of the vehicle.

[0017] When the vehicle sensors determine that the vehicle is within the unloading range and the laser sensor confirms that it is a complete garbage truck outline, the radar and laser sensors will synchronously transmit signals to the PLC controller inside the control box. After receiving and analyzing the signals, the PLC controller will send a forward rotation command to the servo motor inside the drive compartment. The servo motor drives the ball screw to rotate, and the nut on the ball screw moves axially, thereby driving the door to move horizontally along the guide rail, completing the door opening action, and ensuring that the door is fully open when the vehicle arrives at the unloading position.

[0018] When the vehicle finishes unloading and leaves, the laser sensor first detects that the bottom of the vehicle has completely left the unloading area; at the same time, the vehicle sensor detects that the vehicle has moved away to a safe distance. When these two conditions are met, the vehicle sensor and the laser sensor send signals back to the PLC controller. The PLC controller determines that the vehicle has completely left and then sends a reverse command to the servo motor. The servo motor drives the ball screw to move in the opposite direction, which drives the door to move horizontally along the guide rail to complete the closing action.

[0019] If the laser sensor detects an object during the opening and closing of the door, it sends an anti-pinch signal to the PLC controller. Upon receiving the signal, the PLC controller immediately sends an emergency stop command, causing the door to stop moving or slightly open in the reverse direction. At the same time, it triggers an audible and visual alarm in the control box, reminding staff to manually intervene through the control box.

[0020] Compared with the prior art, this application has the following advantages:

[0021] By setting up an intelligent control device, the collaborative operation of human body sensors, vehicle sensors, and laser sensors can accurately identify the status of unloading vehicles, avoiding invalid opening or closing of the gate due to misjudgment. At the same time, each sensor transmits detection signals to the PLC controller in real time. The controller quickly sends instructions to the drive device, and with the efficient drive of the servo motor and ball screw, the action time of opening and closing the gate is greatly shortened. In addition, the laser sensor can detect obstructions during the opening and closing process of the gate in time, triggering the anti-pinch protection mechanism. The PLC controller controls the gate to stop suddenly or open slightly in reverse and triggers an audible and visual alarm. The closed-loop control formed by multiple sensors, the control box, and the drive device, combined with the gate's shielding structure, ensures the safety of personnel and equipment from the source and maximizes the goal of safe production. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of the application and, together with their description, serve to explain the application, but do not constitute an undue limitation of the application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of this application;

[0024] Figure 2 This is a simplified flowchart of the method in this application. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0026] In the description of this application, it should be understood that the relationship between the method steps can be sequential or non-sequential, as long as it does not affect the overall technical effect, and therefore should not be construed as a limitation of this application. The following description of this application is merely a description of individual embodiments of the technical solution of this application; other embodiments are not shown in the following description, but this does not mean that this application excludes these other embodiments, nor is the technical solution of this application limited to the specific implementations described below, and the scope of protection of this application is not limited to the specific implementations described below. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0027] It should be noted that if the terms "first," "second," etc., appear in the specification, claims, and accompanying drawings of this application, such descriptions are only used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application 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 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.

[0028] In some embodiments, such as Figure 1-2 As shown, a safety protection and control device for a waste unloading door in a waste-to-energy plant is disclosed. A ground-opening unloading door 2 is installed on one side of the waste bin 1, and the unloading door 2 is opened and closed by a hydraulic cylinder. Two movable door protective covers 5 are internally connected to door bodies 7. A drive chamber 3 is installed inside the protective cover 5, and the drive chamber 3 contains a servo motor and a ball screw. A controller 9 is installed inside the protective cover 5, and the controller 9 includes two human body sensors 4 fixedly installed on the surface of the protective cover 5. Laser sensors 8 are fixedly installed on the bottom and side surfaces of the protective cover 5. A vehicle sensor 6 is fixedly installed on the protruding edge surface of the waste bin 1. The protective cover 5 is made of 316 stainless steel with a straightness error ≤0.1mm / m and a flat cross-section. The door body 7 is 10mm thick, made of tempered glass, and has safety slogans sprayed on its surface. A pressure strip is installed at the bottom of the door body 7 with a compression amount of 2mm. The servo motor has a power of 1.5kW, a speed of 3000r / min, a response time ≤0.1s, and a ball screw pitch of 10mm with a transmission efficiency ≥90%.

[0029] In this implementation scheme: a controller 9 is installed on the surface of the door frame 5. The controller 9 includes two human body sensors 4 fixedly installed on the surface of the drive compartment 3. Laser sensors 8 are fixedly installed on both sides of the drive compartment 3. Vehicle sensors 6 are fixedly installed on the surface of the garbage compartment 1. The controller 9 of the garbage compartment 1 contains a PLC controller and an audible and visual alarm. The human body sensors 4 and vehicle sensors 6 are electrically connected to the PLC controller inside the controller 9. The PLC controller inside the controller 9 is electrically connected to the servo motor inside the drive compartment 3. The forward and reverse rotation and speed of the servo motor are controlled by pulse signals. 7 is fixedly connected to the ball screw nut pair in the drive compartment 3. The servo motor drives the ball screw to rotate, thereby driving the door to open and close. The laser sensor 8 is set horizontally and is electrically connected to the PLC controller. The human body sensor 4 has a detection distance of 0.5-3m, an accuracy of ±0.1m, and a sampling frequency of 10Hz. The vehicle sensor 6 has a scanning angle of 120°, a detection distance of 2-15m, and a response time of ≤20ms. The PLC controller inside the control box 9 is model S7-1200 with a signal processing cycle of ≤50ms. The alarm frequency of the audible and visual alarm is 1kHz, and the volume is ≥85dB.

[0030] The safety protection control method for the unloading gate in this application is as follows: When the unloading vehicle approaches the unloading area, the vehicle sensor 6 first detects the vehicle's approach, while the laser sensors 8 on both sides of the gate frame scan the vehicle's outline. When the vehicle sensor 6 determines that the vehicle is within the unloading range and the laser sensors 8 confirm that it is a complete garbage truck outline, the radar sensor 6 and the laser sensor 8 will synchronously transmit signals to the PLC controller inside the control box 9. After receiving and analyzing the signals, the PLC controller will send a forward rotation command to the servo motor inside the drive compartment 5. Then, the servo motor drives the ball screw to rotate, and the nut on the ball screw moves axially, thereby driving the gate 7 to move horizontally along the guide rail, completing the opening action of the gate 7. This ensures that when the vehicle arrives at the unloading position, the gate 7 is fully open, and the vehicle leaves after unloading. First, laser sensor 8 detects that the bottom of the vehicle has completely left the unloading area; simultaneously, vehicle sensor 6 detects that the vehicle has moved to a safe distance. When both conditions are met, vehicle sensor 6 and laser sensor 8 send signals to the PLC controller. The PLC controller determines that the vehicle has completely left and then sends a reverse command to the servo motor. Subsequently, the servo motor drives the ball screw to move in the opposite direction, causing the door 7 to move horizontally along the guide rail to complete the closing action. If laser sensor 8 detects an object during the opening and closing of door 7, it will immediately send an anti-pinch signal to the PLC controller. After receiving the signal, the PLC controller immediately sends an emergency stop command, and door 7 stops moving or slightly opens in the reverse direction. At the same time, it triggers the audible and visual alarm in control box 9, reminding the staff to manually intervene through control box 9.

[0031] In some embodiments, this application also provides a waste bin, including a discharge door and a discharge door safety protection control device as described above.

[0032] In some embodiments, this application also provides a waste-to-energy plant, including the waste storage area described above.

[0033] This application, through the coordination of the aforementioned structures, enables accurate vehicle identification through the collaborative efforts of multiple components such as vehicle sensor 6 and laser sensor 8, effectively preventing accidental opening and closing of doors. Simultaneously, the servo motor and ball screw drive system rapidly completes the opening and closing of door 7. During this process, if personnel enter the designated area, human body sensor 4 immediately sends intrusion information to the PLC controller. The PLC analyzes and determines whether a vehicle is present; if no vehicle is present, door 7 is immediately closed to ensure personnel safety. If both a vehicle and personnel are present, the PLC controller triggers an audible and visual alarm in control box 9, reminding staff to pay attention to safe operation, wear safety belts, and take protective measures. This system has a high degree of automation, avoiding the occurrence of accidents during personnel supervision.

[0034] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims. The selected and described embodiments are intended to best elucidate the principles of this application and its practical application, thereby enabling other those skilled in the art to best utilize this application with various modifications suitable for the contemplated specific purpose, as well as the various described embodiments.

Claims

1. A safety protection and control device for a discharge gate, used in a waste storage bin (1) of a waste-to-energy plant, wherein a ground-opening discharge gate (2) is installed on one side of the waste storage bin (1), and the discharge gate (2) is opened and closed by a hydraulic cylinder; characterized in that: It includes two movable door protective covers (5), with a door body (7) slidably connected inside the movable door protective cover (5). A drive chamber (3) is installed inside the protective cover (5), and a servo motor and a ball screw are provided inside the drive chamber (3). Two human body sensors (4) are fixedly installed on the surface of the two movable door protective covers (5). Laser sensors (8) are fixedly installed on the bottom side surfaces of the two movable door protective covers (5). A vehicle sensor (6) is fixedly installed on the protruding edge surface of the garbage bin (1).

2. The unloading gate safety protection control device according to claim 1, characterized in that: A controller (9) is fixedly installed on one side surface of the protective cover (5), and the controller (9) contains a PLC controller and an audible and visual alarm.

3. The unloading gate safety protection control device according to claim 2, characterized in that: The vehicle sensor (6) and the human body sensor (4) are electrically connected to the PLC controller inside the controller (9).

4. The unloading gate safety protection control device according to claim 3, characterized in that: The PLC controller inside the controller (9) and the servo motor inside the drive compartment (3) are electrically connected, and the forward and reverse rotation of the servo motor and the speed of the servo motor are controlled by pulse signals.

5. The unloading gate safety protection control device according to claim 4, characterized in that: The door body (7) is fixedly connected to the ball screw nut pair in the drive compartment (3). The servo motor drives the ball screw to rotate, thereby driving the door body (7) to achieve opening and closing actions.

6. The unloading gate safety protection control device according to claim 5, characterized in that: The vehicle sensor (6) and the human body sensor (4) are interlocked, and the vehicle sensor (6) and the human body sensor (4) are electrically connected to the PLC controller.

7. The unloading gate safety protection control device according to claim 6, characterized in that: The servo motor has a power of 1.5kW, a speed of 3000r / min, a response time of ≤0.1s, a ball screw pitch of 10mm, and a transmission efficiency of ≥90%.

8. A type of waste storage container, characterized in that... Includes a discharge gate and a discharge gate safety protection control device as described in any one of claims 1-7.

9. A waste-to-energy plant, characterized in that... Includes the waste storage container as described in claim 8.

10. A safety protection control method for a discharge gate, employing the safety protection control device for a discharge gate as described in claim 7, characterized in that, include: When the unloading vehicle drives toward the unloading area, the vehicle sensor (6) detects the approach of the vehicle, and at the same time the laser sensors (8) on both sides scan the outline of the vehicle. When the vehicle sensor (6) determines that the vehicle is within the unloading range and the laser sensor (8) confirms that it is a complete garbage truck outline, the radar sensor (6) and the laser sensor (8) will transmit signals synchronously to the PLC controller inside the control box (9). After receiving and analyzing the signals, the PLC controller will send a forward rotation command to the servo motor inside the drive compartment (5). The servo motor drives the ball screw to rotate, and the nut on the ball screw moves axially, thereby driving the door (7) to move horizontally along the guide rail, completing the door (7) opening action, ensuring that the door (7) is fully open when the vehicle arrives at the unloading position. When the vehicle finishes unloading and leaves, the laser sensor (8) first detects that the bottom of the vehicle has completely left the unloading area; at the same time, the vehicle sensor (6) detects that the vehicle has moved away to a safe distance. When these two conditions are met, the vehicle sensor (6) and the laser sensor (8) send signals back to the PLC controller. The PLC controller determines that the vehicle has completely left and then sends a reverse command to the servo motor. The servo motor drives the ball screw to move in the opposite direction, which drives the door (7) to move horizontally along the guide rail to complete the closing action. If the laser sensor (8) detects an object during the opening and closing of the door (7), it sends an anti-pinch signal to the PLC controller. After receiving the signal, the PLC controller immediately sends an emergency stop command, and the door (7) stops moving or opens slightly in the reverse direction. At the same time, it triggers the audible and visual alarm in the control box (9) to remind the staff to manually intervene through the control box (9).

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