A safety protection system for a finned punch press take-up rack

Abstract

A safety protection system for a finned punch press take-up rack includes a finned punch press take-up unit; a main control unit for controlling the start and stop of the finned punch press take-up unit; a detection unit electrically connected to the main control unit for detecting targets approaching the rotating equipment and outputting a stop signal to the main control unit; and an independent power supply unit electrically connected to the detection unit for providing operating voltage to the detection unit. The independent power supply unit is electrically isolated from the power supply system of the main control unit. When the main control unit and / or the finned punch press take-up unit are powered off, the detection unit maintains its operating state through the independent power supply unit. This embodiment, by setting an independent power supply unit electrically isolated from the main control system, continuously supplies power to the detection unit when the equipment is powered off or the main control system fails, ensuring uninterrupted operation of the safety protection function. It has the advantages of maintaining safety detection capability and eliminating safety hazards during power outages.

Description

Technical Field

[0001] This utility model relates to the field of control circuit technology, specifically to a safety protection system for a finned punch press take-up rack. Background Technology

[0002] In industrial automated processing equipment, fin punching presses are widely used in the batch stamping and forming of aluminum fins for air conditioner heat exchangers, automotive radiators, and other products. To improve stamping efficiency and automation, they are usually equipped with a fin receiving rack or receiving unit to receive and organize the stamped fin material. Rotary fin receiving devices are mostly driven by motors or servo systems and are characterized by frequent movements and large rotational inertia. To ensure the safety of operators, most equipment is equipped with emergency stop switches, limit protectors, or physical barriers, forming a basic safety protection system.

[0003] However, the security measures employed in existing technologies still have the following shortcomings:

[0004] Firstly, traditional physical protective devices such as fences or mechanical enclosures can easily affect the ease of equipment operation in actual production, resulting in inconvenient maintenance and interference with operations.

[0005] Secondly, the emergency stop button relies on human triggering, and the response time is affected by the operator's reaction, which poses a risk of lag and makes it difficult to deal with sudden approach behavior;

[0006] Third, most detection and control circuits share the main control system power supply. When the main power supply of the equipment is disconnected or the system fails, the detection module loses its ability to work, causing the critical safety functions to fail and posing a major safety hazard. Utility Model Content

[0007] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a safety protection system and a charging pile control system for a fin punch press receiving frame, which solves the problems of limited application scenarios, slow response speed and poor control flexibility in the existing technology.

[0008] The purpose of this application is to provide a safety protection system for a finned punch press take-up rack and its independent power supply unit, which has the advantage of maintaining safety detection function when the equipment is powered off or the main control system fails, effectively eliminating safety hazards during power outages.

[0009] This application provides a safety protection system for a finned punch press take-up rack, comprising:

[0010] Fin punching machine receiving unit;

[0011] The main control unit is used to control the start and stop of the fin punching machine's take-up unit;

[0012] The detection unit, electrically connected to the main control unit, is used to detect targets approaching the rotating equipment and output a stop signal to the main control unit.

[0013] An independent power supply unit is electrically connected to the detection unit and is used to provide the working voltage for the detection unit. The independent power supply unit is electrically isolated from the power supply system of the main control unit. When the main control unit and / or the fin punching machine take-up unit are powered off, the detection unit maintains its working state through the independent power supply unit.

[0014] Furthermore, the independent power supply unit includes:

[0015] The first transformer TC2 is used to obtain and transform voltage from a three-phase power supply.

[0016] An AC-to-DC module is connected to the secondary side of the first transformer TC2 and is used to convert the AC power of the first transformer TC2 into DC voltage.

[0017] Fuse FU2 is connected between the secondary side of the first transformer TC2 and the AC-to-DC module to provide overcurrent protection.

[0018] Furthermore, the primary side of the first transformer TC2 is connected to any one of the phase lines and the neutral line of the three-phase power supply.

[0019] Furthermore, fuse FU2 is a 10A rated current fuse, one end of which is connected to the secondary side of the first transformer TC2, and the other end is connected to the input terminal of the AC to DC module.

[0020] Furthermore, the AC-to-DC module is an integrated power supply module, with its input terminal connected to fuse FU2 and its output terminal outputting 12V DC voltage.

[0021] Furthermore, the independent power supply unit also includes:

[0022] The second transformer TC1 has its input terminals connected to one phase line and the neutral line of the three-phase power supply, and is used to obtain and transform voltage from the three-phase power supply.

[0023] Internal lighting is used to illuminate the interior of the electrical control cabinet;

[0024] Socket XS2 is used to provide temporary AC power required during maintenance or commissioning.

[0025] Cooling fans are used to dissipate heat from the inside of the electrical control cabinet;

[0026] Fuse FU2 is connected between the secondary side of the second transformer and the input terminals of the panel lighting, socket XS2, and cooling fan to provide overcurrent protection for the panel lighting, socket XS2, and cooling fan.

[0027] Furthermore, the detection unit includes an image sensor or an infrared sensor for detecting a human body or object approaching the fin punching unit, and outputting a stop signal to the main control unit when a human body or object is detected approaching.

[0028] Furthermore, the main control unit enters a locked state after detecting a stop signal, and the fin punching machine take-up unit is only allowed to be restarted after the operator manually triggers the reset control.

[0029] Furthermore, the main control unit is one or more of the following: PLC, PC terminal, and microcontroller.

[0030] Furthermore, the input side of the independent power supply unit is equipped with an air switch QF1, which is used to provide short-circuit protection and power-off control for the independent power supply unit.

[0031] The input side of the independent power supply unit is also equipped with a filter FV1, which is connected between the air switch QF1 and the first transformer TC2 to handle interference signals in the three-phase power supply.

[0032] As can be seen from the above, the safety protection system and its independent power supply unit for the finned punch press receiving rack provided in this application, by setting an independent power supply unit that is electrically isolated from the main control system, continuously supplies power to the detection unit when the equipment is powered off or the main control system fails, ensuring that the safety protection function operates without interruption, and has the advantages of maintaining safety detection capability and eliminating safety hazards during power outages. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a circuit block diagram of this utility model;

[0035] Figure 2 This is a schematic diagram of the circuit principle of the independent power supply unit of this utility model;

[0036] Figure 3 This is a schematic diagram of the circuit principle of the fin punching machine receiving unit, main control unit, and detection unit of this utility model.

[0037] Figure label:

[0038] 100. Fin punching machine receiving unit; 200. Main control unit; 300. Detection unit; 400. Independent power supply unit; 410. AC to DC converter module; 420. Panel lighting; 430. Cooling fan. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings.

[0040] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] In existing technologies, fin punching machines in industrial automated processing equipment generally use emergency stop buttons, limit protectors, or physical barriers as safety protection measures. Although physical barriers can isolate dangerous areas, they need to be disassembled frequently for daily maintenance, which affects work efficiency. Emergency stop buttons rely on manual triggering by operators, which poses a risk of response delay. The detection module and control circuit share the main power supply, and when the main power supply is abnormal, the safety function completely fails, and it is impossible to continuously monitor the dangerous area.

[0044] To address the aforementioned issues, an independent detection mechanism, independent of the main power supply, needs to be designed to ensure that the equipment maintains its safety monitoring function even after a power outage. Isolating the detection unit 300 from the main control unit 200's power supply system can prevent protection failure due to main power supply malfunctions; using automatic trigger signals instead of manual intervention can shorten the hazard response time; and optimizing the power architecture to allow the detection module to operate independently can improve system reliability.

[0045] Therefore, refer to Figure 1This application proposes a safety protection system for a finned punch press take-up rack, including a finned punch press take-up unit 100, a main control unit 200, a detection unit 300, and an independent power supply unit 400: the main control unit 200 controls the start and stop of the take-up unit, the detection unit 300 monitors the area around the rotating equipment in real time and sends a stop signal to the main control unit 200, and the independent power supply unit 400 provides the detection unit 300 with a power supply isolated from the main control system to ensure that the detection unit 300 can continue to work when the main power is disconnected.

[0046] Among them, the fin-collecting unit 100 refers to the mechanical structure that performs the collection and sorting of aluminum fins; the main control unit 200 refers to the logic processing device that controls the operating status of the collecting unit, used to receive detection signals and execute equipment start-up and stop commands; the detection unit 300 refers to the sensing device that identifies intrusion into dangerous areas, used to monitor the surrounding environment of the equipment in real time and trigger safety signals; and the independent power supply unit 400 refers to the power supply module that is electrically isolated from the main control system, used to maintain the operation of the detection unit 300 when the main power supply of the system is interrupted.

[0047] Specifically, when the equipment is running, the detection unit 300 continuously scans the area around the fin punching machine receiving unit 100. If a human or object is detected entering the preset warning range, the detection unit 300 immediately sends an electrical signal to the main control unit 200. The main control unit 200 then cuts off the power supply to the rotary drive unit and locks the movement of the receiving unit. The independent power supply unit 400 obtains power from the three-phase power supply through an independent transformer, and converts it into a stable DC voltage after rectification and filtering. Even if the main control unit 200 loses power due to a fault, the detection unit 300 can still maintain its working state through the independent power supply and continuously monitor the dangerous area.

[0048] Compared to existing technologies, traditional solutions completely fail in terms of safety protection after the main power supply to the equipment is disconnected. This solution, however, utilizes an independent power supply design to ensure continuous power supply to the detection module, eliminating safety blind spots caused by power outages. Conventional emergency stop devices rely on manual triggering, resulting in response lag. This solution achieves millisecond-level response through automatic detection and signal triggering mechanisms, effectively reducing the impact of human factors. Physical fences require regular disassembly and maintenance; this solution employs non-contact detection technology, ensuring safety while minimizing interference with daily operations.

[0049] Through the above technical solutions, this application enables the continuous operation of the safety monitoring function in the event of a power outage, avoiding protection failure caused by abnormal main power supply; the automatic detection mechanism replaces manual intervention, significantly shortens the hazard response time, and reduces the possibility of operators being exposed to dangerous areas; non-contact sensing technology reduces the frequency of use of physical protection devices and improves the convenience of equipment maintenance and operation.

[0050] Reference Figure 2This application further proposes an independent power supply unit 400 including a first transformer TC2 for obtaining and converting voltage from a three-phase power supply; an AC-to-DC module 410 connected to the secondary side of the first transformer TC2 for converting the AC power from the first transformer TC2 into DC voltage; and a fuse FU2 connected between the secondary side of the first transformer TC2 and the AC-to-DC module 410 for providing overcurrent protection.

[0051] Among them, the first transformer TC2 is a device used to obtain and adjust the voltage from the three-phase power supply. Specifically, it can be implemented using a standard power frequency transformer. Its function is to convert the input voltage to a voltage level suitable for subsequent modules. The AC to DC module 410 is a functional unit that converts AC power to DC power. Specifically, it can be implemented using a combination of a rectifier bridge and a filter circuit. Its function is to provide a stable DC operating voltage for the detection unit 300. The fuse FU2 is a component used to cut off the circuit when there is an overload. Specifically, it can be implemented using a glass tube fuse. Its function is to provide overcurrent protection for the secondary circuit and prevent abnormal current from damaging the AC to DC module 410.

[0052] Specifically, the primary side of the first transformer TC2 is connected to any phase line and neutral line of the three-phase power supply, and the AC voltage output from the secondary side is transmitted to the AC-to-DC module 410 through fuse FU2. When the secondary side current exceeds a set threshold, fuse FU2 blows to cut off the circuit, thereby protecting the AC-to-DC module 410 from damage. After converting the input AC power to DC power, the AC-to-DC module 410 continuously supplies power to the detection unit 300. Since the primary side of the first transformer TC2 and the power supply system of the main control unit 200 are connected by different phase lines, and the secondary side circuit is electrically isolated from the power supply of the main control unit 200, the detection unit 300 can still maintain normal operation through the independent power supply unit 400 when the main control unit 200 or the receiving unit is powered off.

[0053] Furthermore, the primary side of the first transformer TC2 is connected to any one of the phase lines and the neutral line of the three-phase power supply.

[0054] In this context, any phase line and neutral line in a three-phase power supply refers to a power system in an industrial power grid that uses a three-phase four-wire power supply method. It consists of three AC phase lines with a phase difference of 120 degrees and a common neutral line. Specifically, it can be achieved by using any one of L1, L2, L3 to form a single-phase circuit with the neutral line N. The voltage can be 220V AC.

[0055] The primary side connection refers to the electrical connection between the transformer input terminal and the power supply. Specifically, it can be achieved by connecting one end of the primary winding of the first transformer TC2 to a phase line of the three-phase power supply and the other end to the neutral line, thereby forming a single-phase power input independent of the power supply system of the main control unit 200.

[0056] Specifically, the primary side of the first transformer TC2 forms a single-phase power supply circuit by selecting any one phase line from the three-phase power supply and connecting it to the neutral line, enabling the independent power supply unit 400 to obtain electrical energy from the three-phase power grid. This connection method allows the independent power supply unit 400 to operate without relying on the power supply systems of the main control unit 200 or the fin punching machine take-up unit 100. When the three-phase power supply is normal, even if the main control unit 200 is de-energized, the operating voltage of the detection unit 300 can still be maintained through this phase line and the neutral line. Since any one phase of the three-phase power supply can independently form a power supply circuit, it can adapt to the differences in power grid configurations of different factories, while avoiding the overall failure of the independent power supply unit 400 due to a fault in a specific phase line.

[0057] Furthermore, fuse FU2 is a 10A rated current fuse. One end of it is connected to the secondary side of the first transformer TC2, and the other end is connected to the input terminal of the AC-to-DC module 410. The output of the secondary side of the first transformer TC2 is connected to the AC-to-DC module 410 through fuse FU2. When the secondary side circuit generates an abnormal current due to equipment failure, the fuse cuts off the circuit when the current exceeds 10A. Since the detection unit 300 is powered by an independent power supply unit 400, the protection function of the fuse can prevent the abnormal current from impacting the circuit of the detection unit 300, ensuring that the detection unit 300 can continue to monitor the dangerous area when the main power supply of the equipment is cut off.

[0058] Furthermore, the AC-to-DC module 410 is an integrated power module, with its input terminal connected to the fuse FU2 and its output terminal outputting a 12V DC voltage.

[0059] It should be noted that the integrated power module refers to a power conversion device that integrates rectification, filtering, and voltage regulation functions into one unit. Specifically, it can be implemented using modular circuits with overvoltage protection and short-circuit protection functions. Its advantages are that it simplifies the circuit layout and improves voltage conversion efficiency. The 12V DC voltage refers to the stable low voltage output after being processed by the AC to DC module 410. Specifically, it can be achieved by adjusting the turns ratio of the transformer secondary winding or by configuring a voltage regulator chip. This voltage value is adapted to the working requirements of the sensors and control circuits in the detection unit 300.

[0060] Specifically, after the three-phase power supply is stepped down by the first transformer TC2, fuse FU2 provides overcurrent protection for the secondary side current. The integrated power module converts the stepped-down AC power into 12V DC power. Since the integrated power module has the necessary protection circuitry, it can maintain a stable output voltage even when the input voltage fluctuates or the load changes. This allows the detection unit 300 to continue operating through the independent power unit 400 when the fin punching machine take-up unit 100 is powered off, preventing the safety protection function from being interrupted.

[0061] Furthermore, the independent power supply unit 400 also includes a second transformer TC1, whose input terminal is connected to one phase and the neutral line of the three-phase power supply, for obtaining and transforming voltage from the three-phase power supply; an internal lighting lamp 420 for illuminating the interior of the electrical control cabinet; a socket XS2 for providing temporary AC power required during maintenance or debugging; a cooling fan 430 for dissipating heat from the interior of the electrical control cabinet; and a fuse FU2 connected between the secondary side of the second transformer and the input terminals of the internal lighting lamp 420, the socket XS2, and the cooling fan 430, for providing overcurrent protection for the internal lighting lamp 420, the socket XS2, and the cooling fan 430.

[0062] Specifically, the second transformer TC1 obtains single-phase AC power from the three-phase power supply and performs voltage transformation. The low-voltage AC power output from the secondary side is divided into three paths: the first path is connected to the panel lighting 420 through fuse FU2 to provide stable lighting inside the control cabinet; the second path is connected to the socket XS2 through fuse FU2 to provide a temporary power supply interface for external equipment; and the third path is connected to the cooling fan 430 through fuse FU2 to continuously dissipate heat from inside the control cabinet. Fuse FU2 is installed in each branch. When any branch experiences an overload or short circuit, the corresponding fuse blows to cut off the faulty circuit, preventing disruption to the normal operation of other branches. Thus, the panel lighting 420 and cooling fan 430 operate continuously during equipment operation, while the socket XS2 can still be powered by the independent power supply unit 400 after the main control unit 200 is powered off, supporting maintenance and debugging operations.

[0063] Furthermore, to ensure monitoring can continue even in the event of a power outage, this embodiment can connect a 12V / 7Ah lead-acid battery in parallel after the output of transformer TC2, and form a UPS bypass through isolation diode D1. When the three-phase power supply is normal, D1 is forward biased, supplying power to the detection unit 300 through power module U1 and providing a full charge to the lead-acid battery; when the air switch QF1 trips or the three-phase voltage is lost, diode D1 is reverse biased, and the lead-acid battery provides ≥1 hour of power supply to the detection unit 300 and PLC input board with a maximum discharge current of 3A, ensuring the continuity of the detection function under complete power failure conditions.

[0064] Furthermore, refer to Figure 3 The detection unit 300 includes an image sensor or an infrared sensor for detecting a human body or object approaching the fin punching machine receiving unit 100, and outputs a stop signal to the main control unit 200 when a human body or object is detected approaching.

[0065] It should be noted that an image sensor is a device that captures dynamic information of a target area through optical imaging principles. Specifically, it can be implemented using CMOS or CCD sensors. It is configured to acquire image data of the area surrounding the receiving unit in real time and analyze the position information of the human body or object through algorithms. An infrared sensor is a device that detects the presence of a target based on changes in thermal radiation. Specifically, it can be implemented using passive infrared sensors. It is configured to trigger detection logic by receiving infrared signals emitted by the human body or object.

[0066] Specifically, refer to Figure 3 The detection unit 300 is configured to cover the working area of ​​the finned punch press take-up unit 100. When a person or object enters the preset safe distance range, the image sensor identifies the abnormal moving target by comparing consecutive frames of images, or the infrared sensor determines the approach of the target by detecting changes in thermal radiation intensity. The detection signal is transmitted to the main control unit 200 in real time, triggering a shutdown command for the equipment. The detection unit 300 is connected to the independent power supply unit 400, maintaining its working state even when the main control unit 200 or the take-up unit is powered off, ensuring the continuity of the safety protection function.

[0067] It should be noted that the detection unit 300 in this embodiment can consist of an industrial camera and a pair of passive infrared probes: the industrial camera is mounted on a fixed bracket 800 mm outward from the center line of the finned punch press take-up unit 100 and 1600 mm above the ground, with a lens depression angle of 15° and a horizontal field of view of 60°; the infrared probes are symmetrically arranged on the protective covers on both sides of the take-up frame, with a center distance of 1200 mm from the ground and a monitoring radius of 3 m. The output signals of the three are introduced into the main control unit 200 through terminals X7-6, X7-7, and X7-8. This fixed coordinate and field of view have been calibrated multiple times on the applicant's prototype and can completely cover the operator's regular entry area and avoid false detections.

[0068] Preferably, the frame rate of the industrial camera is set to 25fps, and the target intrusion can be determined when the area of ​​pixel blocks with morphological differences is >2% in 3 consecutive frames. The trigger threshold of the passive infrared probe is set to the background temperature ±3 K, and the detection cycle is 200 ms.

[0069] Furthermore, the main control unit 200 enters a locked state after detecting a stop signal, and is only allowed to restart the fin punching machine receiving unit 100 after the operator manually triggers the reset control.

[0070] It should be noted that the locked state refers to the main control unit 200 receiving a stop signal, cutting off the drive signal of the fin punching machine receiving unit 100 and maintaining this state. This can be achieved through internal logic circuits or program control modules, so that the equipment cannot resume operation on its own before the lock is released. Manual trigger reset control refers to manually inputting a reset command through an external operating device, which can be achieved through physical buttons, touch screen interfaces, or key switches, ensuring that the operator must actively confirm the safety status before the lock can be released.

[0071] Specifically, when the detection unit 300 detects a human body or object approaching the rotating equipment, it sends a stop signal to the main control unit 200. The main control unit 200 immediately cuts off the drive power to the finned punch press take-up unit 100 and enters a locked state. At this time, the equipment remains stopped, and even if the detection signal disappears or the main control unit 200 is powered on again, the equipment cannot automatically resume operation. The operator must manually trigger the reset control device, such as pressing the reset button or rotating the key switch, to send a reset command to the main control unit 200. Only after the main control unit 200 unlocks the device can the finned punch press take-up unit 100 be restarted.

[0072] In practical implementation, the PLC main program includes five states: RUN→ALARM→LOCK→WAIT_RESET→RUN, and is executed immediately when detection unit 300 sets I0.0.

[0073] Reset output Q0.0 (receiver drive relay K1);

[0074] Set internal register M100 = 1 (LOCK flag);

[0075] Activate the audible and visual alarm Q0.5.

[0076] The program will only clear M100 and set Q0.0 again when the operator presses the reset button SB25 (I0.3=1) and M100=1.

[0077] As can be seen from the above state logic control flow, those skilled in the art, based on their understanding of the system structure and signal response mechanism provided in this application, and combined with conventional PLC programming knowledge, can realize the control flow of this safety protection function by configuring input / output ports, setting internal register flag bits, and writing state jump logic programs. The entire implementation process requires no creative effort.

[0078] Furthermore, refer to Figure 3The main control unit 200 can be one or more of the following: a PLC, a PC terminal, and a microcontroller. A PLC (Programmable Logic Controller), specifically a Mitsubishi FX series or Siemens S7 series, is used to receive signals from the detection unit 300 and control the start and stop of the receiving unit. A PC terminal (Industrial Control Computer), specifically an embedded industrial computer, is used to run safety control programs and provide a human-machine interface. A microcontroller (Microcontroller Chip), specifically an STM32 series or ATmega series, is used to build a compact control system.

[0079] In practical implementation, the main control unit 200 maintains continuous power supply to the detection unit 300 through the independent power supply unit 400. When the main power supply is abnormal, the PLC or microcontroller can still receive the stop signal output by the detection unit 300 and execute a locking action. For example, when a PLC is used as the main control unit 200, its digital input module receives the trigger signal from the infrared sensor and immediately cuts off the control circuit of the receiving unit's drive motor. If a PC terminal is used, the detection unit 300 signal can be judged through software logic and an emergency stop command can be sent to the servo system.

[0080] In some specific implementations, the PLC and PC terminal can work collaboratively, with the PLC responsible for real-time control signal processing and the PC terminal responsible for data recording and alarm information management. The microcontroller can be used independently in miniaturized devices, directly connected to the output of the detection unit 300 via its GPIO port.

[0081] Furthermore, the input side of the independent power supply unit 400 is equipped with an air switch QF1, which provides short-circuit protection and power-off control for the independent power supply unit 400. The input side of the independent power supply unit 400 also includes a filter FV1, connected between the air switch QF1 and the first transformer TC2, to handle interference signals in the three-phase power supply. The air switch QF1 is connected in series to the input terminal of the independent power supply unit 400. When a short-circuit fault occurs in the three-phase power supply, its internal bimetallic strip deforms due to heat, triggering a mechanical linkage mechanism to disconnect the contacts and cut off the power supply circuit of the independent power supply unit 400. The filter FV1 is arranged between the output terminal of the air switch QF1 and the first transformer TC2. Through a filter circuit composed of a common-mode choke and an X2 safety capacitor, it eliminates the influence of high-frequency noise in the power grid on the signal acquisition of the detection unit 300. Therefore, when the main control unit 200 experiences an unexpected power outage, the independent power supply unit 400 can still maintain an independent power supply path through the air switch QF1, while the filter FV1 effectively suppresses false triggering of detection signals caused by power grid fluctuations.

[0082] It should be noted that FV1 uses a 100EBS1D-10-380 three-phase common-mode filter, rated at 480 V_AC, 50A, @150kHz, with an insertion loss ≥40 dB; FU2 uses a 10AT slow-blow glass tube fuse, I²t=30 A²s, and is matched to a downstream surge current of 6A / 10 ms. The specifications of the above devices have been verified for insulation withstand voltage and EFT / B reliability in the prototype, and meet the requirements of the EN60204-1 system.

[0083] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A safety guard system for a fin press unloader, characterized by, include: Fin punching machine receiving unit; The main control unit is used to control the start and stop of the fin punching machine take-up unit; The detection unit, electrically connected to the main control unit, is used to detect targets approaching the rotating device and output a stop signal to the main control unit. An independent power supply unit is electrically connected to the detection unit and is used to provide the detection unit with operating voltage. The independent power supply unit is electrically isolated from the power supply system of the main control unit. When the main control unit and / or the fin punching machine receiving unit are powered off, the detection unit maintains its working state through the independent power supply unit.

2. The safety shield system for a fin punch sheet collection rack of claim 1, wherein, The independent power supply unit includes: The first transformer TC2 is used to obtain and transform voltage from a three-phase power supply. An AC-to-DC module is connected to the secondary side of the first transformer TC2 and is used to convert the AC power of the first transformer TC2 into DC voltage. Fuse FU2 is connected between the secondary side of the first transformer TC2 and the AC-to-DC module to provide overcurrent protection.

3. The safety shield system for a fin punch sheet collection rack of claim 2, wherein, The primary side of the first transformer TC2 is connected to any one of the phase lines and the neutral line of the three-phase power supply.

4. The safety shield system for a fin punch sheet collection rack of claim 2, wherein, The fuse FU2 is a 10A rated current circuit breaker, with one end connected to the secondary side of the first transformer TC2 and the other end connected to the input terminal of the AC to DC module.

5. The safety shield system for a fin punch sheet collection rack of claim 2, wherein, The AC-to-DC module is an integrated power supply module, whose input terminal is connected to the fuse FU2, and whose output terminal outputs a 12V DC voltage.

6. The safety shield system for a fin punch sheet collection rack of claim 2, wherein, The independent power supply unit also includes: The second transformer TC1 has its input terminals connected to one phase line and the neutral line of the three-phase power supply, and is used to obtain and transform voltage from the three-phase power supply. Internal lighting is used to illuminate the interior of the electrical control cabinet; Socket XS2 is used to provide temporary AC power required during maintenance or commissioning. A cooling fan is used to dissipate heat from the interior of the electrical control cabinet; Fuse FU2 is connected between the secondary side of the second transformer and the input terminals of the panel lighting, the socket XS2, and the cooling fan, and is used to provide overcurrent protection for the panel lighting, the socket XS2, and the cooling fan.

7. The safety shield system for a fin punch sheet collection rack of claim 1, wherein, The detection unit includes an image sensor or an infrared sensor, used to detect a human body or object approaching the finned punching machine receiving unit, and to output a stop signal to the main control unit when a human body or object is detected approaching.

8. The safety shield system for a fin punch sheet collection rack of claim 7, wherein, The main control unit enters a locked state after detecting a stop signal, and the fin punching machine receiving unit is only allowed to be restarted after the operator manually triggers the reset control.

9. The safety shield system for a fin punch sheet collection rack of claim 1, wherein, The main control unit is one or more of the following: PLC, PC terminal, and microcontroller.

10. The safety shield system for a fin punch sheet collection rack of claim 1, wherein, The input side of the independent power supply unit is equipped with an air switch QF1, which is used to provide short-circuit protection and power-off control for the independent power supply unit. The input side of the independent power supply unit is also equipped with a filter FV1, which is connected between the air switch QF1 and the first transformer TC2 to handle interference signals in the three-phase power supply.

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