A three-wire Hall sensor wiring verification device for nuclear power plants

Abstract

The present invention belongs to the technical field of installation and maintenance of Hall sensors in nuclear power plants, and specifically relates to a three-wire Hall sensor wiring verification device for nuclear power plants. A power plug, a power switch, a rectifier unit, and a lithium battery are connected in sequence; the rectifier unit and the lithium battery are connected to a start switch together; the start switch is connected to a DC boost module; there is a liquid crystal display on the DC boost module, and the DC boost module is externally connected with a DC boost module output adjustment knob, a DC boost module output + terminal, an M measurement terminal, and a DC boost module output ‑ terminal; a constant current source module is connected to the DC boost module, and the constant current source module is externally connected with a constant current source module output + terminal, a constant current source module output ‑ terminal, and a constant current source module output adjustment knob; a Hall sensor wiring detection display module is connected to the DC boost module. The present invention verifies the correctness of the wiring of a three-wire Hall sensor whose installation position is relatively concealed.

Description

Technical Field

[0001] The invention belongs to the technical field of installation and maintenance of Hall sensors in nuclear power plants, and in particular relates to a wiring calibration device for a three-wire Hall sensor in a nuclear power plant. Background Art

[0002] The low-voltage DC switchgear of nuclear power plants uses a large number of three-wire Hall sensors to collect and monitor current signals such as the charger output current and battery charging current. The collected current signals participate in the operation control of the equipment, for example, the battery charging current signal participates in the output voltage control of the charger. The installation location of some Hall sensors on site is very hidden, and it is impossible to visually check whether the wiring of the Hall sensor end is correct. When the cable is terminated after the equipment is installed, the wiring between the equipment can only be terminated according to the wiring reference on the current terminal block. After the termination, it is impossible to confirm whether the wiring is correct. After the equipment is started and operated, the wiring error of the Hall sensor may not appear immediately, but will appear in a certain working condition according to the function of the Hall sensor, resulting in abnormal equipment status, which may affect the normal power supply of the DC bus and affect the safe operation of the nuclear power unit. At present, there is no suitable tool to assist in verifying whether the wiring of the Hall sensor is correct during wiring, so a device specifically used to verify the wiring of the Hall sensor is needed to verify the correctness of the wiring of the Hall sensor with a relatively hidden installation location. Summary of the invention

[0003] The object of the present invention is to provide a three-wire Hall sensor wiring verification device for a nuclear power plant, which verifies the correctness of the wiring of the three-wire Hall sensor which is installed in a relatively concealed position.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A three-wire Hall sensor wiring verification device for a nuclear power plant comprises a power plug, a power switch, a rectifier unit and a lithium battery connected in sequence; the rectifier unit and the lithium battery are connected together to a start switch; the start switch is connected to a DC boost module; a liquid crystal display is provided on the DC boost module, and the DC boost module is externally connected with a DC boost module output adjustment knob, a DC boost module output + terminal, an M measurement terminal and a DC boost module output - terminal; a constant current source module is connected to the DC boost module, and the constant current source module is externally connected with a constant current source module output + terminal, a constant current source module output - terminal and a constant current source module output adjustment knob; and a Hall sensor wiring detection display module is connected to the DC boost module.

[0006] The power plug, power switch, rectifier unit and start switch are located on the right side of the device housing from top to bottom.

[0007] The DC boost module is located at the upper left of the device housing, the DC boost module output + terminal, M measurement terminal, and DC boost module output - terminal are located above the DC boost module, and the DC boost module output adjustment knob is located below the DC boost module.

[0008] The Hall sensor wiring detection and display module is located at the lower left side of the device housing.

[0009] The constant current source module is located in the upper middle of the device housing, the constant current source module output + terminal and the constant current source module output - terminal are located above the constant current source module, and the constant current source module output adjustment knob is located below the constant current source module.

[0010] The lithium battery is located in the lower middle part of the device shell.

[0011] The device shell is a suitcase-type structure.

[0012] The power plug is connected to a 220V AC power supply, and after the 220V AC power supply is connected, it is sent to the rectifier unit through the power switch. The rectifier unit rectifies the 220V AC power supply into a 12V DC power supply and sends it to the lithium battery. The lithium battery ensures that the device can be used normally without an external power supply;

[0013] Press the start switch, the lithium battery or rectifier unit transmits power to the DC boost module, the DC boost module boosts the 12VDC input power and outputs it, the DC boost module output adjustment knob adjusts the output voltage as needed; the power boosted by the DC boost module supplies three loads, one is to supply the external Hall sensor that needs wiring verification through the DC boost module output + terminal and DC boost module output - terminal, the second is to supply the constant current source module as the working power supply, and the third is to supply the Hall sensor wiring detection display module as the working power supply;

[0014] When no current flows through the conductor through which the Hall sensor that needs to be wired checked is connected, external current is added to both ends of the conductor through which the Hall sensor is connected through the constant current source module output - terminal, the DC boost module output adjustment knob, and the constant current source module output + terminal to simulate the actual operating conditions. The constant current source module output + terminal corresponds to the upper end of the conductor through which the Hall sensor is connected, and the constant current source module output - terminal corresponds to the lower end of the conductor through which the Hall sensor is connected. The constant current source module output adjustment knob adjusts the output current of the constant current source module.

[0015] The Hall sensor wiring detection and display module converts the measured current signal output by the Hall sensor to be wired into a voltage signal and displays it on the LCD screen of the Hall sensor wiring detection and display module. Whether the wiring of the Hall sensor is correct can be judged according to the displayed voltage value;

[0016] In actual operation, the DC boost module output + terminal corresponds to the + wiring of the Hall sensor, the M measurement terminal corresponds to the M wiring of the Hall sensor, and the DC boost module output - terminal corresponds to the - wiring of the Hall sensor. Only when the wiring is correct, the Hall sensor wiring detection display module displays that the voltage is within the given normal range.

[0017] The output adjustment knob of the DC boost module is used to adjust the output voltage as required, and the adjustment range is 12-30VDC.

[0018] The beneficial effects achieved by the present invention are:

[0019] The three-wire Hall sensor wiring verification device for a nuclear power plant provided by the present invention enriches the device functions, and can complete the wiring verification of the three-wire Hall sensor with one device, which is convenient and simple to operate and improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure diagram of the wiring verification device for the three-wire Hall sensor used in nuclear power plants;

[0021] In the figure: 1-device housing, 2-power plug, 3-power switch, 4-rectifier unit, 5-lithium battery, 6-start switch, 7-DC boost module output + terminal, 8-M measurement terminal, 9-DC boost module output - terminal, 10-DC boost module, 11-DC boost module output adjustment knob, 12-constant current source module output + terminal, 13-constant current source module output - terminal, 14-constant current source module, 15-constant current source module output adjustment knob, 16-Hall sensor wiring detection display module. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, a three-wire Hall sensor wiring verification device for a nuclear power plant includes: a device housing 1, a power plug 2, a power switch 3, a rectifier unit 4, a lithium battery 5, a start switch 6, a DC boost module output + terminal 7, an M measurement terminal 8, a DC boost module output - terminal 9, a DC boost module 10, a DC boost module output adjustment knob 11, a constant current source module output + terminal 12, a constant current source module output - terminal 13, a constant current source module 14, a constant current source module output adjustment knob 15, and a Hall sensor wiring detection display module 16.

[0024] The device housing 1 is a suitcase-type structure; the power plug 2, the power switch 3, the rectifier unit 4, and the lithium battery 5 are connected in sequence; the rectifier unit 4 and the lithium battery 5 are connected together to the start switch 6; the start switch 6 is connected to the DC boost module 10; the DC boost module 10 has a liquid crystal display screen, and the DC boost module 10 is externally connected to a DC boost module output adjustment knob 11, a DC boost module output + terminal 7, an M measurement terminal 8, and a DC boost module output - terminal 9; the constant current source module 14 is connected to the DC boost module 10, and the constant current source module 14 is externally connected to a constant current source module output + terminal 12, a constant current source module output - terminal 13, and a constant current source module output adjustment knob 15; the Hall sensor wiring detection display module 16 is connected to the DC boost module 10, and the Hall sensor wiring detection display module 16 has a display screen. The power plug 2, the power switch 3, the rectifier unit 4, and the start switch 6 are located on the right side of the device housing 1 from top to bottom; the DC boost module 10 is located on the upper left side of the device housing 1, the DC boost module output + terminal 7, the M measurement terminal 8, and the DC boost module output - terminal 9 are located above the DC boost module 10, and the DC boost module output adjustment knob 11 is located below the DC boost module 10; the Hall sensor wiring detection display module 16 is located at the lower left side of the device housing 1; the constant current source module 14 is located in the upper middle of the device housing 1, the constant current source module output + terminal 12 and the constant current source module output - terminal 13 are located above the constant current source module 14, and the constant current source module output adjustment knob 15 is located below the constant current source module 14; the lithium battery 5 is located in the lower middle inside the device housing 1.

[0025] The device housing 1 is a portable suitcase structure, which is convenient for moving and protecting the tool.

[0026] The power plug 2 can connect the device to a 220V AC power supply. After the 220V AC power supply is connected, it is sent to the rectifier unit 4 through the power switch 3. The rectifier unit 4 rectifies the 220V AC power supply into a 12V DC power supply and sends it to the lithium battery 5. The lithium battery 5 can ensure that the device can be used normally without an external power supply.

[0027] When the start switch 6 is pressed, the lithium battery 5 or the rectifier unit 4 transmits power to the DC boost module 10, which boosts the 12VDC input power and outputs it. The DC boost module 10 has a liquid crystal display, and the DC boost module output adjustment knob 11 can adjust the output voltage as needed, with an adjustment range of 12-30VDC. The power boosted by the DC boost module 10 supplies three loads, one is to supply the external Hall sensor that needs to be wired through the DC boost module output + terminal 7 and the DC boost module output - terminal 9, the second is to supply the constant current source module 14 as the working power, and the third is to supply the Hall sensor wiring detection display module 16 as the working power.

[0028] When no current flows through the conductor through which the Hall sensor that needs to be wired is verified, an external current can be added to both ends of the conductor through which the Hall sensor is passed through through the constant current source module output -terminal 13, the DC boost module output adjustment knob 11, and the constant current source module output +terminal 12 of the constant current source module 14 to simulate the actual operating conditions. The constant current source module output +terminal 12 corresponds to the upper end of the conductor through which the Hall sensor is passed, and the constant current source module output -terminal 13 corresponds to the lower end of the conductor through which the Hall sensor is passed. The constant current source module output adjustment knob 15 can adjust the output current of the constant current source module 14.

[0029] The Hall sensor wiring detection display module 16 converts the measured current signal output by the Hall sensor to be wired into a voltage signal and displays it on the LCD screen of the Hall sensor wiring detection display module 16. Whether the wiring of the Hall sensor is correct can be determined based on the displayed voltage value.

[0030] In actual operation, the DC boost module output + terminal 7 corresponds to the + wiring of the Hall sensor, the M measurement terminal 8 corresponds to the M wiring of the Hall sensor, and the DC boost module output - terminal 9 corresponds to the - wiring of the Hall sensor. Only when the wiring is correct, the Hall sensor wiring detection display module 16 displays that the voltage is within the given normal range.

Claims

1. A three-wire Hall sensor wiring verification device for a nuclear power plant, characterized in that: The power plug, the power switch, the rectifier unit, and the lithium battery are connected in sequence; the rectifier unit and the lithium battery are connected together to the start switch; the start switch is connected to the DC boost module; the DC boost module has a liquid crystal display screen, and the DC boost module is externally connected with a DC boost module output adjustment knob, a DC boost module output + terminal, an M measurement terminal, and a DC boost module output - terminal; the constant current source module is connected to the DC boost module, and the constant current source module is externally connected with a constant current source module output + terminal, a constant current source module output - terminal, and a constant current source module output adjustment knob; the Hall sensor wiring detection display module is connected to the DC boost module; The power plug is connected to a 220V AC power supply, and after the 220V AC power supply is connected, it is sent to the rectifier unit through the power switch. The rectifier unit rectifies the 220V AC power supply into a 12V DC power supply and sends it to the lithium battery. The lithium battery ensures that the device can be used normally without an external power supply; Press the start switch, the lithium battery or rectifier unit transmits power to the DC boost module, the DC boost module boosts the 12VDC input power and outputs it, the DC boost module output adjustment knob adjusts the output voltage as needed; the power boosted by the DC boost module supplies three loads, one is to supply the external Hall sensor that needs wiring verification through the DC boost module output + terminal and DC boost module output - terminal, the second is to supply the constant current source module as the working power supply, and the third is to supply the Hall sensor wiring detection display module as the working power supply; When no current flows through the conductor through which the Hall sensor that needs to be wired checked is connected, external current is added to both ends of the conductor through which the Hall sensor is connected through the constant current source module output - terminal, constant current source module output adjustment knob, and constant current source module output + terminal of the constant current source module to simulate the actual operating conditions. The constant current source module output + terminal corresponds to the upper end of the conductor through which the Hall sensor is connected, and the constant current source module output - terminal corresponds to the lower end of the conductor through which the Hall sensor is connected. The constant current source module output adjustment knob adjusts the output current of the constant current source module. The Hall sensor wiring detection and display module converts the measured current signal output by the Hall sensor to be wired into a voltage signal and displays it on the LCD screen of the Hall sensor wiring detection and display module. Whether the wiring of the Hall sensor is correct can be judged according to the displayed voltage value; In actual operation, the DC boost module output + terminal corresponds to the + wiring of the Hall sensor, the M measurement terminal corresponds to the M wiring of the Hall sensor, and the DC boost module output - terminal corresponds to the - wiring of the Hall sensor. Only when the wiring is correct, the Hall sensor wiring detection display module displays that the voltage is within the given normal range.

2. The three-wire Hall sensor wiring verification device for a nuclear power plant according to claim 1, characterized in that: The power plug, power switch, rectifier unit and start switch are located on the right side of the device housing from top to bottom.

3. The three-wire Hall sensor wiring verification device for a nuclear power plant according to claim 1, characterized in that: The DC boost module is located at the upper left of the device housing, the DC boost module output + terminal, M measurement terminal, and DC boost module output - terminal are located above the DC boost module, and the DC boost module output adjustment knob is located below the DC boost module.

4. The three-wire Hall sensor wiring verification device for a nuclear power plant according to claim 1, characterized in that: The Hall sensor wiring detection and display module is located at the lower left side of the device housing.

5. The three-wire Hall sensor wiring verification device for a nuclear power plant according to claim 1, characterized in that: The constant current source module is located in the upper middle of the device housing, the constant current source module output + terminal and the constant current source module output - terminal are located above the constant current source module, and the constant current source module output adjustment knob is located below the constant current source module.

6. The three-wire Hall sensor wiring verification device for a nuclear power plant according to claim 1, characterized in that: The lithium battery is located in the lower middle part of the device shell.

7. The three-wire Hall sensor wiring verification device for a nuclear power plant according to any one of claims 2 to 6, characterized in that: The device shell is a suitcase-type structure.

8. The three-wire Hall sensor wiring verification device for a nuclear power plant according to claim 1, characterized in that: The output adjustment knob of the DC boost module is used to adjust the output voltage as required, and the adjustment range is 12-30VDC.

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