Special portable multi-channel multi-level output and valve action rapid detection device for nuclear power plant

Abstract

The invention belongs to the technical field of automation, and particularly relates to a portable multi-channel multi-level output and valve action rapid detection device special for a nuclear power plant. The device comprises a shell, a plurality of input and output channel board cards, a battery board card, an interaction panel and a main control board card, the four input and output channel board cards are arranged on one side of the shell, and each input and output channel board card comprises a set of 48VDC voltage input channels, can detect the on-off state of input voltage and comprises two sets of same DC voltage output channels. The device has the beneficial effects that the device is provided with the upper computer operation platform, various signal states of the device can be remotely received, and meanwhile, the device is controlled. For a radioactive area in a nuclear power plant and other areas which are not easy for personnel to approach, the staff can realize remote operation through a wireless connection technology.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of automation, and particularly relates to a portable multi-channel multi-level output and valve action rapid detection device special for nuclear power plants. BACKGROUND

[0002] In existing power plants, there are many problems in the maintenance and related work of pneumatic valves (especially during the overhaul of the power plant), which leads to low efficiency of maintenance testing, unqualified testing, and the like.

[0003] Taking a nuclear power unit as an example, the valve maintenance and testing related work mainly has the following problems:

[0004] (1) There are more than 200 valves to be maintained and tested in the nuclear island and nuclear auxiliary system during a single overhaul, and the upstream power supply permission cannot be obtained in time due to the working condition limitation, so that most of the valves need to be powered by an external fixed power supply, which increases the workload of the workers and greatly affects the post-maintenance testing efficiency of the valves during the low water level period of the overhaul.

[0005] (2) Some valve maintenance work actually needs to remove the signal (power supply) line on the rack side, and the power supply needs to be connected again on the rack side during the maintenance process. Such repeated disconnection and connection of the line will increase the work failure points and work risks.

[0006] (3) When the valve opening and closing experiment is performed, the opening and closing time and other information need to be recorded. At present, the reading and recording are performed manually using a stopwatch, and the deviation can be up to seconds, which has a large deviation problem. Not only will this cause misjudgment of the valve usability, but also will affect the judgment of the IO of the unit during the overhaul and the judgment of the event exceeding the operation technical specification.

[0007] Operation experience and maintenance show that, as the service life of the power plant increases, the corresponding valve maintenance work task becomes more and more heavy. At present, there are hundreds of pneumatic valves in a nuclear power unit, and the maintenance and testing work needs to be performed every year. However, there is no such valve testing device at present. Therefore, it is urgent to invent a portable testing device which can supply power to the electromagnetic valve of the pneumatic valve alone and accurately record the valve opening and closing time. SUMMARY

[0008] The application aims to provide a portable multi-channel multi-level output and valve action rapid detection device special for nuclear power plants. The device is internally provided with a rechargeable battery as a device power supply, can realize multi-level, multi-power, and multi-channel output, has valve opening and closing testing time detection and sequence recording functions, can be connected to an upper computer through WIFI for convenient viewing and automatic calculation of the valve opening / closing time, and can realize automatic generation of a testing report, data output, and the like.

[0009] The technical scheme of the present application is as follows: a portable multi-channel multi-level output and valve action rapid detection device, comprising a shell, a plurality of input / output channel board cards, a battery board card, an interactive panel and a main control board card, wherein four input / output channel board cards are arranged on one side of the shell, each input / output channel board card comprises a group of 48VDC voltage input channels, can detect the on-off state of the input voltage, comprises two groups of same DC voltage output channels,

[0010] An interactive panel is arranged on the shell, and the interactive panel comprises a device power switch, an 8-way voltage output switch and an indicator light, a start button, a stop button and a display; a power switch and a charging jack are further arranged on the shell;

[0011] A main control board card, a 12V power output board, a 24V power output board, a 48V power output board, a 110V power output board and a battery board card are arranged on the side of the shell opposite to the side on which the input / output channel board cards are arranged; and a host computer is wirelessly connected with the main control board card in the shell.

[0012] The shell is a frame structure and is used as a case; and other components are mounted or plugged on the shell.

[0013] Four plug-in board card structure input / output channel board cards are arranged on one side of the shell in parallel.

[0014] The input / output board cards comprise a 12V input / output channel board card, a 24V input / output channel board card, a 48V input / output channel board card and a 110V input / output channel board card; the 12V input / output channel board card is provided with a 12VDC channel 1 switch and an indicator light A, a 12VDC channel 2 switch and an indicator light and a voltage / current input channel; the 24V input / output channel board card is provided with a 24VDC channel 1 switch and an indicator light, a 24VDC channel 2 switch and an indicator light and a voltage / current input channel; the 48V input / output channel board card is provided with a 48VDC channel 1 switch and an indicator light, a 48VDC channel 2 switch and an indicator light 10F and a voltage / current input channel; and the 110V input / output channel board card is provided with a 110VDC channel 1 switch and an indicator light, a 110VDC channel 2 switch and an indicator light and a voltage / current input channel.

[0015] The display displays time, event information, device name, battery voltage, output voltage, remaining power, voltage output state and switch feedback state.

[0016] The battery board card comprises two battery board cards, and the first battery board card and the second battery board card supply power to the device.

[0017] The first and second battery card include 18650 lithium battery and boost / buck module, which is controlled by the main control card to provide power for four input / output channel card after boosting and provide power supply for display screen after bucking.

[0018] The host computer is an independent tablet computer, which displays battery capacity, power plant voltage, various input / output states, device information, historical event record, voltage trend curve of each channel, can automatically calculate time difference between output and input signal, and automatically generate test report.

[0019] The main control card contains various input and output signal interfaces and measures and processes valve opening / closing time.

[0020] The main control card can realize the following functions:

[0021] The device realizes overvoltage, undervoltage, short circuit and temperature protection functions;

[0022] Various input and output signal interfaces are contained to process data of signals;

[0023] The time from receiving opening instruction to fully opening of the valve and the time from receiving closing instruction to fully closing of the valve are measured and processed;

[0024] The display of the device body is connected to provide display signal;

[0025] Wireless connection with the host computer is realized to transmit various information of the device to the host computer to realize interaction.

[0026] The beneficial effects of the present invention are as follows: At present, the valve action time recording method for the post-repair test of pneumatic valves in nuclear power plants is manual stopwatch timing, which has a large time error (up to seconds), and the working process requires the cooperation of other personnel, and the valve power supply is restricted by external conditions. The application of this device can shorten the pneumatic valve maintenance time, improve the efficiency of post-repair testing, and effectively shorten the overhaul period. In addition, the recording accuracy of the device is extremely high (up to 1ms), and the test results are more reliable, which can improve the safety of the unit and reduce the unit defect rate. Compared with the existing technology, (1) the present device has a host computer operating platform, which can receive the status of each signal of the device from a distance and realize the control of the device at the same time. For areas such as radioactive areas in nuclear power plants that are difficult for personnel to approach, the staff can realize remote operation through wireless connection technology. (2) The present device can record all status information and events of the device, and has a simple interface, clear historical trend chart and other information, which can realize automatic generation of test reports and provide convenient human-computer interaction operation for the staff. (3) This device has multi-level and multi-channel output (two channels each for 12 / 24 / 48 / 110VDC), which can be applied to most types of solenoid valves in nuclear power plants. It also has four voltage / current output channels. The above conditions can realize the simultaneous testing of multiple pneumatic valves, greatly improving the efficiency of on-site maintenance. (4) The device has high time accuracy, with a recording accuracy of 1ms. (5) The device is designed with two battery cards that work in turn, which can realize one power supply and the other removed for charging. If necessary, it can be used as a mobile power supply to continuously power the on-site equipment to support on-site work, and the device will not be unavailable due to power failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a front view of a portable multi-channel, multi-level output and valve action rapid detection device for nuclear power plants provided by the present invention;

[0028] Figure 2 This is a rear view of a portable multi-channel, multi-level output and valve action rapid detection device for nuclear power plants provided by the present invention;

[0029] Figure 3 This is the overall structure diagram;

[0030] Figure 4 Main control board hardware structure and signal flow;

[0031] Figure 5 The hardware structure and signal flow of the power board.

[0032] In the figure: 10 is the shell, 20 is the first battery board, 30 is the second battery board, 40 is the main control board, 50 is the 12V power output board, 60 is the 24V power output board, 70 is the 48V power output board, 80 is the 110V power output board, 80A is a group of output channels, 80B is the first output channel of 110VDC, 80C is the second output channel of 110VDC, 10A is the 12VDC channel 1 switch and indicator light, 10B is the 12VDC channel 2 switch Switch and indicator light, 10C is the 24VDC channel 1 switch and indicator light, 10D is the 24VDC channel 2 switch and indicator light, 10E is the 48VDC channel 1 switch and indicator light, 10F is the 48VDC channel 2 switch and indicator light, 10G is the 110VDC channel 1 switch and indicator light, 10H is the 110VDC channel 2 switch and indicator light, 10I is the power switch, 10J is the charging jack, 10K is the start button, 10L is the stop button, and 90 is the display screen. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] A portable multi-channel, multi-level output and valve action rapid detection device comprises: a housing 10, multiple input and output channel boards, a battery board, an interactive panel and display 90, and a main control board 40. The housing 10 is a frame structure used as the chassis of the device, and other components are installed or plugged into the housing 10.

[0035] like Figure 1 As shown, one side of the housing 10 is installed with four input and output channel boards with a plug-in board structure arranged in parallel. Each input and output channel board contains a set of 48VDC voltage input channels, which can detect the on-off status of the input voltage; at the same time, each board contains two sets of identical DC voltage output channels. The four input and output boards can output 12 / 24 / 48 / 110VDC voltages for load power supply respectively. The on-off of the output voltage is controlled by the main control board, and the power is supplied by the battery board. Specifically, the 12V input and output channel board realizes constant voltage output of two 12V (10W) power supplies and one limit switch input; the 24V input and output channel board realizes constant voltage output of two 24V (20W) power supplies and one limit switch input; the 48V input and output channel board realizes constant voltage output of two 48V (36W) power supplies and one limit switch input; the 110V input and output channel board realizes constant voltage output of two 110V (20W) power supplies and one limit switch input.

[0036] Specifically, the 12V input and output channel board card is provided with a 12VDC channel 1 switch and indicator 10A, a 12VDC channel 2 switch and indicator 10B, and a voltage / current input channel, the 24V input and output channel board card is provided with a 24VDC channel 1 switch and indicator 10C, a 24VDC channel 2 switch and indicator 10D, and a voltage / current input channel, the 48V input and output channel board card is provided with a 48VDC channel 1 switch and indicator 10E, a 48VDC channel 2 switch and indicator 10F, and a voltage / current input channel, the 110V input and output channel board card is provided with a 110VDC channel 1 switch and indicator 10G, a 110VDC channel 2 switch and indicator 10H, and a voltage / current input channel, the housing 10 is provided with an interactive panel, the interactive panel includes a device power switch 10I, an 8-way (12 / 24 / 48 / 110VDC two ways each) voltage output switch and indicator, a test "start" / "stop" function key start button 10K, a stop button 10L, and a display 90, the two function keys are used to set the start and stop time of the recording device from power supply to receiving feedback; the display 90 displays time, event information, device name, battery voltage, output voltage, remaining power, voltage output state, switch feedback state and other information. The housing 10 is also provided with a power switch 10I and a charging jack 10J.

[0037] As shown in Figure 2 The housing 10 is provided with a main control board card 40, a 12V power output board 50, a 24V power output board 60, a 48V power output board 70, a 110V power output board 80 and a battery board card on the side opposite to the installation of the input and output channel board card, the battery board card includes two battery board cards, a first battery board card 20 and a second battery board card 30 for power supply of the device, each battery board card has an "OK" indicator to prompt the card state, and single battery board card power supply can be realized, and the other battery board card can be removed for separate charging, so that the device can continuously output power supply. The battery board card is a plug-in card. The first battery board card 20 and the second battery board card 30 both include a 18650 lithium battery pack and a boost / buck module, which is controlled by the main control board card 40 to supply power to the four input and output channel board cards after boosting, and to supply power to the display screen 90 after bucking, thereby ensuring the normal operation of the device.

[0038] The host computer is wirelessly connected with the main control board card 40 in the housing 10, and in this embodiment, it is a separate tablet computer, only one whole tablet computer, without other accessories. The host computer can display battery capacity, power plant voltage, input / output state of each way, device information, historical event record, voltage trend curve of each channel and other information, can automatically calculate the time difference between the output and input signals, and automatically generate a test report for the user to view or print.

[0039] The main control card 40 comprises various input and output signal interfaces; measures and processes the valve opening / closing time, and can realize the following functions:

[0040] ①Realize basic protection functions such as overvoltage, undervoltage, short circuit, and temperature protection;

[0041] ②Comprise various input and output signal interfaces, and perform data processing on signals;

[0042] ③Measure and process the time from receiving an opening instruction to the valve being fully opened, and the time from receiving a closing instruction to the valve being fully closed.

[0043] ④Connect with the device body display to provide display signals;

[0044] ⑤Wirelessly connect with the upper computer to transmit device information to the upper computer and realize interaction.

[0045] The main control card 40, as the core control card, controls and exchanges data with the battery card, the input and output card, the display, and the interactive panel to perform signal processing functions. The main control card 40 monitors the signal states of the input and output cards, the button states of the operation panel, the data states of the power supply card, and the operation instructions of the interactive panel in real time, and displays these states on the display screen and the interactive panel screen in real time. The main control card is connected with the input and output card through the RS485 bus protocol, connected with the interactive panel and the display through the TTL serial port, and connected with the upper computer wirelessly using the WiFi mode.

[0046] The main function of the device is to record the full opening or full closing action time of the pneumatic valve (the "valve opening time" is defined as the difference between the electromagnetic valve action time and the feedback time when the valve is fully opened; the "valve closing time" is defined as the difference between the electromagnetic valve action and the feedback time when the valve is fully closed), and automatically generate a test report for the user to view and archive.

[0047] The device realizes the valve action time recording function in the following way:

[0048] (1) Determine the working voltage of the electromagnetic valve, and connect the corresponding output voltage of the device to both ends of the electromagnetic valve through a wiring cable;

[0049] (2) Connect the valve feedback signal in series to an input channel of the device;

[0050] (3) After clicking the "start" test button, the device starts recording the input and output states of each channel. When the hard switch button of the corresponding output channel is pressed, the electromagnetic valve is powered on (powered off). At this time, the device will record an "event". When the valve feedback signal changes, the device will automatically record this "event". Click the "stop" button to exit the recording.

[0051] (4) In the host computer through the selection of wiring channels, you can automatically calculate the time difference between two events, and can view the status of each channel and trend chart through the host computer software. The host computer can automatically generate test reports for users to view and archive.

[0052] The main part of the device is an integrated case, equipped with a separate host computer (a tablet computer can be used).

[0053] Embodiment:

[0054] As shown in Figure 4 , the front panel of the device is arranged with device power switch button, 8-way (12 / 24 / 48 / 110VDC two ways each) voltage output switch button and indicator light, test "start" and "stop" two function keys, charging port and display. The rear of the device has 7 plug-in board cards, which are battery board cards (two pieces), main control board card, 12 / 24 / 48 / 110VDC input / output board card, each input / output board card has corresponding two-way voltage output channel, one-way voltage / current input channel, and the channel arrangement is as shown in Figure 4 .

[0055] To facilitate understanding of the workflow, assume a common working condition on site (the rest of the conditions are basically the same as this process):

[0056] There is a gas opening valve type pneumatic two-position valve, which requires to record the valve opening action time (electromagnetic valve power-on to valve opening limit feedback trigger time), and the device records the pneumatic valve opening time workflow as follows:

[0057] (1) Determine the voltage level corresponding to the electromagnetic valve of the pneumatic valve, select the corresponding voltage output channel of the device (such as using output 1 channel of 24VDC). Use the wiring to connect the 24VDC 1 channel to the two ends of the electromagnetic valve coil for power supply.

[0058] (2) Use the special wiring to connect the input 1 channel (2 / 3 / 4 any input channel can also be used) in series to the opening limit feedback loop to receive the opening limit loop voltage signal to determine the opening limit feedback state.

[0059] (3) Click the power-on button on the device to display the current device status.

[0060] (4) Open the host computer software and click the "online" button to connect the device and the host computer.

[0061] (5) Click the "start" button on the device, and the main control board starts to scan the voltage and limit switch state of each channel at high speed, and stores an initial snapshot record.

[0062] The voltage channel predefines the +5V threshold, voltage ≥ 5V is 1, < 5V is 0; the state of the limit switch, on is 1, off is 0.

[0063] (6) Press the 24V output 1 channel switch, at this time the channel output voltage ≥ 5V, the channel changes from 0 to 1, the device automatically records the event.

[0064] (7) After the limit switch is triggered, record an event, press the "stop" button on the front panel of the device to end the test.

[0065] (8) Click the "response time" button to convert to channel state information. Click the "incremental reading" button to automatically position to the trend position of the just tested process.

[0066] (9) Automatically calculate the action time: input the valve number, select

[0067] "24V power channel 1 trigger time" - "channel 1 trigger time"

[0068] Click the "calculate" button to automatically calculate the "response time" and display it.

[0069] (10) Click the "screenshot" button to automatically generate a test report and save it in the designated location for the user to view and archive.

[0070] The above is only one case of recording the "valve opening action time". According to the on / off of the solenoid valve, the on / off of the limit switch

[0071] and different combinations of feedback, there are many forms of action time records. The recording operation method is basically the same as the above operation method.

Claims

1. A portable multi-channel multi-level output and valve action rapid detection device, characterized by: It includes a shell, multiple input and output channel boards, a battery board, an interactive panel and a main control board. Four input and output channel boards are arranged on one side of the shell. Each input and output channel board contains a set of 48VDC voltage input channels, which can detect the on-off status of the input voltage and contains two sets of the same DC voltage output channels. The housing is provided with an interactive panel, which includes a power switch, an 8-way voltage output switch and an indicator light, a start button, a stop button, and a display. The housing is also provided with a power switch and a charging jack; The main control board, 12V power output board, 24V power output board, 48V power output board, 110V power output board and battery board are installed on the side of the shell opposite to the input and output channel board. The host computer is wirelessly connected to the main control board in the shell. The main control board contains various input and output signal interfaces; measures and processes valve opening / closing time; and can achieve the following functions: Realize the device overvoltage, undervoltage, short circuit and temperature protection functions; Contains various input and output signal interfaces to process the signals; Measure and process the time from when the valve receives the open command to when the valve is fully opened, and the time from when the valve receives the close command to when the valve is fully closed; Connected to the device's main display to provide display signals; Realize wireless connection with the host computer, transmit various information of the device to the host computer, and realize interaction.

2. A portable multi-channel multi-level output and valve action rapid detection device as claimed in claim 1, characterized in that: The shell is a frame structure used as a chassis, and other components are installed or plugged into the shell.

3. The portable multi-channel multi-level output and valve action rapid detection device according to claim 1, characterized in that: One side of the shell is equipped with four input and output channel boards of a plug-in board structure arranged in parallel.

4. The portable multi-channel multi-level output and valve action rapid detection device according to claim 1, characterized in that: The input and output boards include a 12V input and output channel board, a 24V input and output channel board, a 48V input and output channel board, and a 110V input and output channel board. The 12V input and output channel board is provided with a 12VDC channel 1 switch and indicator light A, a 12VDC channel 2 switch and indicator light, and a voltage / current input channel; the 24V input and output channel board is provided with a 24VDC channel 1 switch and indicator light, a 24VDC channel 2 switch and indicator light, and a voltage / current input channel; the 48V input and output channel board is provided with a 48VDC channel 1 switch and indicator light, a 48VDC channel 2 switch and indicator light 10F, and a voltage / current input channel; and the 110V input and output channel board is provided with a 110VDC channel 1 switch and indicator light, a 110VDC channel 2 switch and indicator light, and a voltage / current input channel.

5. The portable multi-channel multi-level output and valve action rapid detection device according to claim 1, characterized in that: The display shows time, event information, device name, battery voltage, output voltage, remaining power, voltage output status, and switch feedback status.

6. The portable multi-channel multi-level output and valve action rapid detection device according to claim 1, characterized in that: The battery board includes two battery boards, and the first battery board and the second battery board provide power for the device.

7. A portable multi-channel multi-level output and valve action rapid detection device as claimed in claim 6, characterized in that: The first battery board and the second battery board include 18650 lithium battery packs and boost / buck modules, which are controlled by the main control board to boost the voltage and then power the four input and output channel boards, and provide power supply for the display screen after bucking.

8. The portable multi-channel multi-level output and valve action rapid detection device according to claim 1, characterized in that: The host computer is an independent tablet computer that displays battery power, power plant voltage, input / output status of each channel, device information, historical event records, and voltage trend curves of each channel. It can automatically calculate the time difference between output and input signals and automatically generate a test report.

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