CN212659315U

CN212659315U - Self-diagnosis self-calibration cooling system leakage monitoring device

Info

Publication number: CN212659315U
Application number: CN202021374225.0U
Authority: CN
Inventors: 葛畅; 李苏; 尉昊
Original assignee: Atomhorizon Electric Jinan Co ltd
Current assignee: Atomhorizon Electric Jinan Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2021-03-05
Anticipated expiration: 2030-07-14

Abstract

The utility model relates to a nuclear power monitoring technology field, concretely relates to self-diagnosis self-calibration cooling system leakage monitoring device, including remote probe, amplification conversion unit, collection integrated circuit board and computer, remote probe with amplification conversion unit connects, amplification conversion unit with the collection integrated circuit board connects, the collection integrated circuit board with the computer is connected, the computer still with amplification conversion unit connects; the remote probe is used for measuring the air temperature and humidity value of the pipeline gap; the amplification conversion unit is used for amplifying and transmitting signals transmitted by the remote probe; the acquisition board card is used for acquiring the analog quantity signal output by the amplification conversion unit and converting the analog quantity signal into a digital quantity signal; the computer is used for analyzing and processing the signals input by the acquisition board card, self-diagnosis self-calibration monitoring can be realized, the diagnosis time is reduced, and the monitoring efficiency and the reliability of safe operation of the nuclear power station reactor are improved.

Description

Self-diagnosis self-calibration cooling system leakage monitoring device

Technical Field

The utility model relates to a nuclear power monitoring technology field especially relates to a cooling system leakage monitoring device of self-diagnosis self calibration.

Background

When a cooling circuit in a reactor pressure vessel of a nuclear power station leaks, a data acquisition and calculation technology belongs to the field of high-precision data acquisition, developed countries such as America and Europe are in the leading position in the technical field, and the technology is also developed since the nuclear power stations in the Bay and the Qin mountain of China are built.

In the cooling system of the reactor pressure vessel in the nuclear power plant constructed in the past, most of the monitoring of the high-energy steam leakage in the cooling loop is monitored and diagnosed by adopting a water balance method and a pit liquid level method.

The defects of the prior art are as follows:

defect one: the existing monitoring means has long monitoring time period and long delay time, and cannot monitor and alarm in time.

And defect two: the existing monitoring means can not accurately position the leakage position.

And a third defect: to the double-end fracture of main pipeline, such high energy pipeline of main steam pipeline for avoiding the pipeline to take place under extreme condition, can install additional on the pipeline and prevent that potential displacement that breaks of restriction pipeline such as flail piece usually. The method has high cost, can only limit accidents passively under the condition of extreme working conditions, and loses the capability of actively monitoring and preventing the brittle fracture of the high-energy pipeline.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem among the prior art, provide a cooling system leakage monitoring device of self-diagnosis self calibration, the device not only can realize carrying out accurate location to cooling system's real-time supervision, leaking the position to cooling system, still includes that whole monitoring device carries out self-diagnosis and self calibration.

The technical scheme of the utility model is that:

a self-diagnosis and self-calibration cooling system leakage monitoring device comprises a remote probe, an amplification conversion unit, a collection board card and a computer, wherein the remote probe is connected with the amplification conversion unit, the amplification conversion unit is connected with the collection board card, the collection board card is connected with the computer, and the computer is also connected with the amplification conversion unit;

the remote probe is used for measuring the air temperature and humidity value of the pipeline gap;

the amplification conversion unit is used for amplifying and transmitting signals transmitted by the remote probe;

the acquisition board card is used for acquiring the analog quantity signal output by the amplification conversion unit and converting the analog quantity signal into a digital quantity signal;

and the computer is used for analyzing and processing the signals input by the acquisition board card.

As a preferred technical solution, the remote probe comprises 48 groups, and each group of remote probe internally comprises an RTD temperature resistance and capacitance type humidity sensor, a standard resistance, a standard capacitance and a relay;

the RTD temperature resistance is used for realizing temperature measurement;

the capacitance type humidity sensor is used for realizing humidity measurement, and the standard resistance and the standard capacitance are used as references to serve as self-calibration functions of the RTD temperature resistance and the capacitance type humidity sensor;

the relay is used for switching between a temperature and humidity measuring mode and a calibration mode.

As a preferable technical solution, the housing of the remote probe is made of 316 stainless steel.

As a preferred technical solution, the amplification and conversion unit includes a signal amplification converter, a signal generation module, a communication module and a power module;

the signal amplifier is used for acquiring signals of the remote probe and outputting current signals related to temperature and humidity;

the signal generation module is used for providing a driving signal for the remote probe;

the communication module is used for receiving the control signal of the computer and controlling the relay in the remote probe to be opened or closed;

the power module is used for supplying power to the amplification conversion unit.

As a further preferable technical solution, the signal amplification converter includes a signal amplifier of RTD temperature resistance and a signal amplifier of capacitance type humidity sensor.

As a preferred technical scheme, the acquisition board card comprises an analog signal input module, a signal conversion module and a digital signal output module;

the analog signal input module is used for acquiring a current signal output by the signal amplification converter;

the signal conversion module is used for converting the analog signal into a digital signal;

and the digital signal output module is used for transmitting the digital signal to a computer for data calculation.

As a preferred technical scheme, the computer comprises a CPU, a display, a network card, a hard disk and a keyboard and a mouse; the CPU is used for controlling the module, entering and diagnosing digital signals, displaying leakage calculation through digital diagnosis of preliminary information, and predicting possible situations of detected leakage.

The utility model discloses a cooling system leakage monitoring device of self-diagnosis self calibration can realize self-diagnosis self calibration monitoring, has reduced diagnostic time, has improved monitoring efficiency and nuclear power station reactor safe operation's reliability.

Drawings

Fig. 1 is a schematic diagram of the functional module architecture of the present invention.

Detailed Description

In order to make the utility model realize that the technical means, technical characteristics, utility model purpose and technological effect are easily understood and known, combine specific figure below, further explain the utility model.

The first embodiment is as follows:

as shown in fig. 1, the utility model discloses in contain the remote probe subassembly 1 that is used for measuring pipeline breach air humiture for the enlarged conversion unit subassembly 2 that the probe signal enlargies the transmission, be used for the collection integrated circuit board subassembly 3 of analog signal acquisition conversion and be used for signal analysis to handle computer components 4.

The remote probe assembly 1 comprises 48 remote probes for measuring the air temperature and humidity of the pipeline gap. Each remote probe is internally provided with a RTD temperature resistor, a capacitance type humidity sensor, a standard resistor, a standard capacitor and a relay, wherein the RTD temperature resistor and the capacitance type humidity sensor are used for realizing temperature and humidity measurement, the standard resistor and the standard capacitor are used as references and are used for referencing the self-calibration function of the RTD temperature resistor and the capacitance type humidity sensor, and the relay is used for switching a temperature and humidity measurement mode and a calibration mode.

The amplification conversion unit component 2 comprises a signal amplification converter, a signal generation module, a power supply module and a communication module. The signal amplifier is used for collecting signals of the remote probe of the assembly 1 and outputting current signals related to temperature and humidity, the signal amplification converter comprises two independent conversion channels, and each channel comprises two amplifiers: a signal amplifier of RTD temperature resistance (temperature channel) and a signal amplifier of capacitive humidity sensor (humidity channel). The signal generating module is used for providing a driving signal for the remote probe of the assembly 1. The communication module is used for receiving the control signal of the computer assembly 4 and controlling the opening and closing of the relay in the remote probe assembly 1. The power module is used for supplying power to each module of the amplification and conversion unit assembly 2.

The acquisition board card assembly 3 comprises a 96-channel analog signal input module, a signal conversion module and a path of digital signal output module. The analog signal input module is used for acquiring current signals output by the signal amplification converter of the component 2, converting the analog signals into digital signals through the signal conversion module, and transmitting the digital signals to the computer component 4 through the digital signal output module for data calculation.

The computer component 4 comprises a CPU, a display, a network card, a hard disk and a mouse keyboard. The CPU is used for controlling the module, entering and diagnosing digital signals, displaying leakage calculation through digital diagnosis of preliminary information, and predicting possible situations of detected leakage. And the CPU realizes the operation capability control of the measurement channel and the monitoring of the system cabinet, realizes the functions of recording, retrieving, storing for a long time and displaying information, and transmits the state of the system and the state of a monitoring object to a comprehensive analysis system in the nuclear power plant through a local network.

The computer component 4 establishes a mathematical model for the temperature and humidity parameters collected by the adjacent sensors, evaluates the temperature and humidity signals between the adjacent sensors according to the model, compares the collected temperature and humidity signals with the mathematical model, judges whether the collected temperature and humidity signals accord with the mathematical model, judges whether the collected temperature and humidity signals are abnormal if the collected data exceed an allowable error, and judges whether the collected data are normal if the collected data are within an allowable error range, thereby realizing self-diagnosis of the sensors.

And switching the abnormal sensor to a calibration mode through a self-diagnosis result, and adjusting and correcting acquisition parameters by acquiring signals of a standard resistor and a standard capacitor to realize self-calibration of the sensor.

Example two:

in this embodiment, different from embodiment 1, the amplification conversion unit includes 12 signal amplification converters, each signal amplification converter includes a signal amplifier of RTD temperature resistance and a signal amplifier of capacitive humidity sensor, each signal amplifier of RTD temperature resistance is connected with 4 remote probes, and each signal amplifier of capacitive humidity sensor is also connected with 4 remote probes.

In summary, the preferred embodiments of the present invention are only described, and the scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the content of the claims of the present invention shall fall within the technical scope of the present invention.

Claims

1. A self-diagnosis and self-calibration cooling system leakage monitoring device is characterized by comprising a remote probe, an amplification conversion unit, a collection board card and a computer, wherein the remote probe is connected with the amplification conversion unit, the amplification conversion unit is connected with the collection board card, the collection board card is connected with the computer, and the computer is also connected with the amplification conversion unit;

2. The self-diagnostic self-calibrating cooling system leakage monitoring device of claim 1, wherein said remote probes comprise 48 groups, and each group of said remote probes internally comprises RTD temperature resistance and capacitance humidity sensors, standard resistance, standard capacitance and relays;

the RTD temperature resistance is used for realizing temperature measurement;

3. The self-diagnosis self-calibration cooling system leakage monitoring device according to claim 1, wherein the amplification conversion unit comprises a signal amplification converter, a signal generation module, a communication module and a power supply module;

the signal amplification converter is used for acquiring signals of the remote probe and outputting current signals related to temperature and humidity;

4. The self-diagnostic self-calibrating leakage monitor device for cooling system of claim 3, wherein said signal amplification converter comprises signal amplifier of RTD temperature resistance and signal amplifier of capacitance humidity sensor.

5. The device for monitoring the leakage of the self-diagnosis self-calibration cooling system according to any one of claims 1 to 4, wherein the acquisition board card comprises an analog signal input module, a signal conversion module and a digital signal output module;

6. The self-diagnosis self-calibration cooling system leakage monitoring device according to any one of claims 1 to 4, wherein the computer comprises a CPU, a display, a network card, a hard disk and a keyboard and mouse; the CPU is used for controlling the module, entering and diagnosing digital signals, displaying leakage calculation through digital diagnosis of preliminary information, and predicting possible situations of detected leakage.

7. The self-diagnostic self-calibrating cooling system leak monitoring device of any one of claims 1-4, wherein the remote probe housing is 316 stainless steel metal.