A front-end power supply control device for a hot work equipment

Abstract

The utility model discloses a kind of front-end power supply control devices of hot work equipment, including AC relay, control unit and power supply unit;AC relay, for controlling the power supply of hot work equipment;Control unit, for receiving the instruction of external terminal, and control the on-off of AC relay coil;Power supply unit, for power supply control unit.The beneficial effects of the utility model are: the utility model controls the power supply situation of hot work equipment to control hot work operation in real time, can guarantee only when receiving permission instruction, hot work equipment can be started;To reduce fire risk and guarantee the safety of workers.

Description

Technical Field

[0001] This utility model relates to the field of construction safety technology, and in particular to a front-end power supply control device for hot work equipment suitable for construction sites. Background Technology

[0002] Hot work is a common type of work on construction sites. This involves using various heat sources such as gas welding, electric welding, and flame cutting equipment to perform metal welding, cutting, or other processing. Electric welding is a crucial component of hot work operations.

[0003] However, because these operations typically involve extremely high temperatures and sparks, improper management can easily lead to fires or explosions. Therefore, the safe management of hot work operations is crucial. Currently, hot work control primarily relies on manual management, ensuring safety through strict safety regulations, enhanced on-site supervision and inspection, and the implementation of a hot work permit system. However, unauthorized hot work cannot be completely eliminated. Utility Model Content

[0004] In response to the inability to achieve real-time control of hot work operations such as electric welding at construction sites, and the phenomenon that workers carry out hot work operations without applying for a hot work permit, this utility model provides a front-end power supply control device for hot work equipment.

[0005] To achieve the above-mentioned utility model objectives, this utility model provides a front-end power supply control device for hot work equipment, wherein the control system includes an AC relay, a control unit, and a power supply unit;

[0006] The AC relay is used to control the power supply to the hot work equipment;

[0007] The control unit is used to receive instructions from an external terminal and control the on / off state of the AC relay coil;

[0008] The power supply unit is used to supply power to the control unit.

[0009] The control unit includes an MCU, and a communication module, a control module, a display module, a clock module, and a data acquisition module connected to the MCU; specifically,

[0010] The communication module is used for data interaction with external terminals;

[0011] The control module is used to receive control signals from the MCU and connect to the coil of the AC relay through a MOS transistor to control the on / off state of the power supply circuit of the hot work equipment.

[0012] The data acquisition module is used to collect the voltage, current and power consumption of the hot work equipment;

[0013] The display module is used to display the voltage, current, power consumption, working time, and working status of the hot work equipment collected by the data acquisition module;

[0014] The clock module is used to receive calibration instructions from the MCU and update the clock to the specified date and time.

[0015] The MCU is an STM32F103C8T6 chip, which has a built-in CRC calculation module, DMA controller, multiple GPIO ports, timers, etc.

[0016] The clock module includes a DS1302 chip and a battery connected to it. The DS1302 chip communicates with the MCU via an SPI interface. The clock module is an RTC clock module, which provides real-time clock and calendar functions, accurately counts seconds, minutes, hours, days, weeks, months, and years, and automatically adjusts the dates of months with less than 31 days and leap years. The battery provides independent power to the RTC clock module.

[0017] The data acquisition module includes a current transformer and a voltage acquisition unit. The output of the current transformer is connected to the voltage acquisition unit, and the voltage acquisition unit communicates with the MCU via an SPI interface. The data acquisition module also includes a ferroelectric memory FM24CL64, which is connected to the MCU via an I2C bus.

[0018] The control module includes a MOSFET Q1 and a transistor Q2 connected to the MOSFET Q1;

[0019] The output terminal of the MCU is connected to the base of transistor Q2 through resistor R40. The collector of transistor Q2 is connected to the gate of MOSFET Q1 through resistor R32. The drain of MOSFET Q1 is connected to the coil of AC relay. The source of MOSFET Q1 is connected to DC power supply VCC-12V. The other end of the AC relay coil is grounded. The emitter of transistor Q1 is grounded.

[0020] The main circuit of the AC relay is connected in series with the power supply circuit of the hot work equipment to control the power supply of the hot work equipment.

[0021] The AC relay has a freewheeling diode D2 and a light-emitting diode D3 connected in parallel across its coil; the drain of the MOSFET Q1 is grounded through a decoupling capacitor C27.

[0022] The power supply unit includes an AC / DC module and a DC / DC module; it is used to supply power to the MCU, data acquisition module, display module, and communication module.

[0023] The communication unit is a Bluetooth module and / or a 4G module.

[0024] The current transformer is model GTA30L, the voltage acquisition unit is a smart metering IC: HLW8112; the MCU is model STM32F103C8T6; the AC / DC module of the power supply unit is model AP12N20-HV, the DC / DC module is model SY8253ADC; the 4G module of the communication module is EG800K, the Bluetooth module is Bluetooth chip HC-08; and the clock module is model DAS1302.

[0025] To better achieve the aforementioned objectives, this utility model also provides the physical structure of the control system, specifically including a housing and a circuit board and an AC relay fixedly disposed within the housing. The circuit board is equipped with the MCU, display module, power supply module, communication module, and clock module. The data acquisition module includes a current transformer and a voltage acquisition device disposed on the circuit board. The display module is an OLED display screen. The housing includes an upper housing and a lower housing, and the upper housing is provided with a transparent display screen cover.

[0026] Cables are fixed to the opposite sides of the housing via waterproof connectors, and the control system is connected to the power supply circuit of the hot work equipment via the cables.

[0027] The beneficial effects of this utility model are: by controlling the power supply of the hot work equipment, this utility model can manage the hot work operation in real time, ensuring that the hot work equipment can only be started when a permission instruction is received; thereby reducing the risk of fire and protecting the lives of workers. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention.

[0029] Figure 2 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0030] Figure 3 This is a circuit diagram of the control unit in Embodiment 1 of this utility model.

[0031] Figure 4 This is a circuit diagram of the data acquisition module in Embodiment 1 of this utility model.

[0032] The attached figures are labeled as follows:

[0033] 1. Display cover; 2. Upper housing; 3. Circuit board; 4. Display module; 5. Power supply module; 6. Voltage acquisition unit; 7. Intermediate fixing plate; 8. Stud; 9. AC relay; 10. Current transformer; 11. Lower housing; 12. Waterproof connector. Detailed Implementation

[0034] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0035] Example 1

[0036] See Figure 1 This utility model embodiment provides a front-end power supply control device for hot work equipment. The control system includes an AC relay, a control unit, and a power supply unit; wherein,

[0037] AC relays are used to control the power supply to equipment used in hot work.

[0038] The control unit is used to receive instructions from external terminals and control the switching on and off of the AC relay coil;

[0039] The power supply unit is used to supply power to the control unit.

[0040] The control unit includes an MCU, and communication modules, control modules, display modules, clock modules, and data acquisition modules connected to the MCU; specifically,

[0041] The communication module is used for data interaction with external terminals;

[0042] The control module is used to receive control signals from the MCU and connect to the coil of the AC relay through a MOSFET to control the on / off state of the power supply circuit of the hot work equipment.

[0043] The data acquisition module is used to collect the voltage, current, and power consumption of the hot work equipment;

[0044] The display module is used to display the voltage, current, power consumption, working time, and working status of the hot work equipment collected by the data acquisition module;

[0045] The system also includes a memory connected to the MCU via an I2C bus, used to store authorized operation period parameters and calibration data.

[0046] The clock module is used to receive calibration instructions from the MCU and update the clock to the specified date and time. The clock module includes a DS1302 chip and a battery connected to it. The DS1302 chip communicates with the MCU through an SPI interface.

[0047] See Figure 4 The data acquisition module includes a current transformer (model GTA30L) and a voltage acquisition unit (intelligent metering IC: HLW8112). The voltage acquisition unit acquires voltage through the IAP and VP pins and acquires current from the current transformer through the IBP and IBN pins. The voltage acquisition unit communicates with the MCU through the SPI interface.

[0048] See Figure 3The control module includes a MOSFET Q1 and a transistor Q2 connected to the MOSFET Q1;

[0049] The MCU output is connected to the base of transistor Q2 through resistor R40. The collector of transistor Q2 is connected to the gate of MOSFET Q1 through resistor R32. The drain of MOSFET Q1 is connected to the coil of AC relay. The source of MOSFET Q1 is connected to DC power supply VCC-12V. The other end of AC relay coil is grounded. The emitter of transistor Q1 is grounded.

[0050] The main circuit of the AC relay is connected in series with the power supply circuit of the hot work equipment to control the power supply of the hot work equipment.

[0051] In this circuit, a freewheeling diode D2 and a light-emitting diode D3 are connected in parallel across the coil of the AC relay; the drain of the MOSFET Q1 is grounded through a decoupling capacitor C27.

[0052] The power supply unit includes an AC / DC module and a DC / DC module; it is used to power the MCU, data acquisition module, display module, and communication module.

[0053] The communication unit is a Bluetooth module and / or a 4G module.

[0054] The clock module includes an RTC clock module and a battery;

[0055] The RTC clock module provides real-time clock and calendar functionality, accurately counting seconds, minutes, hours, days, weeks, months, and years, and automatically adjusting for months with fewer than 31 days and leap years.

[0056] The battery provides the RTC clock module with independent power supply.

[0057] The MCU is an STM32F103C8T6, which has a built-in CRC calculation module, DMA controller, multiple GPIO ports, timers, etc. It is responsible for processing the received instructions, and compares whether hot work is allowed in real time through the circuit. Based on the judgment result, it controls the control module. The MCU is existing technology and will not be described in detail here. The AC / DC module of the power supply unit is AP12N20-HV and the DC / DC module is SY8253ADC. The 4G module of the communication module is EG800K and the Bluetooth module is Bluetooth chip HC-08. The clock module is DAS1302.

[0058] Example 2

[0059] See Figure 2Based on the content of Embodiment 1, this utility model embodiment also includes a housing and a circuit board 3 and an AC relay 9 fixedly disposed within the housing. The circuit board 3 is equipped with an MCU, a display module 4, a power supply module 5, a communication module, and a clock module. The data acquisition module includes a current transformer 10 and a voltage acquisition device 6 disposed on the circuit board 3. The display module is an OLED display screen 4. The housing includes an upper housing 2 and a lower housing 11. A transparent display screen cover 1 is disposed on the upper housing 2. An intermediate fixing plate 7 is disposed inside the housing. The intermediate fixing plate 7 separates the current transformer 10 and the AC relay 9 at the bottom of the housing. The intermediate fixing plate 7 also serves to fix and support the components and provides electrical isolation. The upper housing 2 and the lower housing 11 are connected by studs 8. Cables are fixed to the opposite sides of the housing through waterproof connectors 12. The control system is connected to the power supply circuit of the hot work equipment through the cables.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power supply control device for the front end of hot work equipment, characterized in that, Includes AC relays, control units, and power supply units; The AC relay is used to control the power supply to the hot work equipment; The control unit is used to receive instructions from an external terminal and control the on / off state of the AC relay coil; The power supply unit is used to supply power to the control unit.

2. The apparatus according to claim 1, characterized in that, The control unit includes an MCU, and a communication module, a control module, a display module, a clock module, and a data acquisition module connected to the MCU; wherein, The communication module is used for data interaction with external terminals; The control module is used to receive control signals from the MCU and connect to the coil of the AC relay through a MOS transistor to control the on / off state of the power supply circuit of the hot work equipment. The data acquisition module is used to collect the voltage, current and power consumption of the hot work equipment; The display module is used to display the voltage, current, power consumption, working time, and working status of the hot work equipment collected by the data acquisition module; The clock module is used to receive calibration instructions from the MCU and update the clock to the specified date and time.

3. The apparatus according to claim 2, characterized in that, The data acquisition module includes a current transformer and a voltage acquisition unit. The output of the current transformer is connected to the voltage acquisition unit, and the voltage acquisition unit communicates with the MCU via an SPI interface. It also includes a memory connected to the MCU via an I2C bus.

4. The apparatus according to claim 2, characterized in that, The control module includes a MOSFET and a transistor connected to the MOSFET; The output terminal of the MCU is connected to the base of the transistor through a resistor, the collector of the transistor is connected to the gate of the MOS transistor through a resistor, the drain of the MOS transistor is connected to the coil of the AC relay, and the source of the MOS transistor is connected to a DC power supply; the other end of the AC relay coil is grounded; the emitter of the transistor is grounded. The main circuit of the AC relay is connected in series with the power supply circuit of the hot work equipment to control the power supply of the hot work equipment.

5. The apparatus according to claim 2 or 3, characterized in that, The power supply unit includes an AC / DC module and a DC / DC module; it is used to supply power to the MCU, data acquisition module, display module, and communication module.

6. The apparatus according to claim 2 or 3, characterized in that, The communication module is a Bluetooth module and / or a 4G module.

7. The apparatus according to claim 2 or 3, characterized in that, It also includes a housing, a circuit board and an AC relay fixedly installed inside the housing. The circuit board is equipped with the MCU, display module, power supply unit, communication module and clock module. The data acquisition module includes a current transformer and a voltage acquisition device installed on the circuit board. The display module is an OLED display screen. The housing includes an upper housing and a lower housing, and the upper housing is provided with a transparent display screen cover. Cables are fixed to the opposite sides of the housing via waterproof connectors, and the device is connected to the power supply circuit of the hot work equipment via the cables.

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