CN212808440U - Nuclear power station actuating mechanism insulation and direct resistance testing device - Google Patents

Abstract

The utility model discloses an insulating and direct resistance testing arrangement of nuclear power station actuating mechanism, include: the device comprises a low-voltage direct-current resistance testing module, a high-voltage insulation resistance testing module, an automatic switching isolation module, a universal I/O interface, a main control module, an alarm module, a communication module, a local display module, a programming power supply module and a special testing cable kit. The utility model discloses, can accomplish the measurement of insulation resistance, dielectric strength and the direct current resistance of nuclear power station actuating mechanism coil assembly with a equipment through adopting this technical scheme, special test cable external member can realize connecting 1 time, and 16 at least passageway data automatic scanning are measured, have solved the precision difference that current manual test exists, inefficiency, testing personnel bear the problem that the irradiation dose is big.

Description

Nuclear power station actuating mechanism insulation and direct resistance testing device

Technical Field

The utility model relates to a nuclear power station actuating mechanism coil capability test technical field specifically is a nuclear power station actuating mechanism is insulating and directly hinders testing arrangement.

Background

A nuclear power plant driving mechanism is a device for controlling the position of nuclear fuel rods for controlling and regulating startup, power regulation, compensation of residual reactivity, shutdown, and emergency shutdown of a nuclear reactor. The driving mechanism of the nuclear power station generally comprises a pressure-resistant shell, an electromagnetic component, a moving component, a driving rod, a position indicator and other parts. The electromagnetic assembly and the position indicator are composed of a plurality of groups of coils and are main components for realizing control rod position control. Hundreds of same driving mechanisms are often installed in a nuclear power plant reactor at the same time, so that data detection and monitoring of insulation and direct resistance of a nuclear power plant driving mechanism coil in maintenance is an important means for ensuring nuclear power safety. Each maintenance requires the measurement of thousands of sets of data before each set of drive mechanism coil performance can be evaluated. The existing measurement means mainly comprises that a detector adopts a universal meter to manually measure the resistance of a coil point by point, and an insulation meter is used to manually measure the insulation resistance of the coil point by point. The problems that the measurement accuracy is greatly influenced by operators, the lead error, the connection point and the meter stick slip, the misdetection, the misrecording, the omission of the recording and the like of a measuring instrument cannot be eliminated, the repeated test is often needed, the field environment is in a radioactive pollution area, the testers need to rotate every certain working time, the irradiation dose is prevented from exceeding the standard, the efficiency is very low, and the major line overhaul time is influenced.

The case of manual connection of the measuring instrument and the input end to be measured is replaced by manual rotation switch switching, so that the uncertainty of manual connection of the measuring input end is reduced, and the test efficiency is improved. However, this method also requires a tester to connect a plurality of test terminals at a time, and then manually rotate the measurement switch to complete data measurement point by point. This method still does not completely solve the above-mentioned problems and does not eliminate the measurement errors caused by cabinet wiring and test leads.

Therefore, it is a research direction of those skilled in the art to develop a novel testing device for insulation and direct current resistance of a driving mechanism of a nuclear power plant, which can realize fast and efficient measurement of insulation resistance and direct resistance parameters of a coil of the driving mechanism in a reactor of the nuclear power plant.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a nuclear power station actuating mechanism is insulating with directly hinder testing arrangement to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a nuclear power station drive mechanism insulation and direct resistance testing device comprises:

the low-voltage direct current resistance testing module: the test range is 0.01 omega-1M omega, and the programmable power supply can output a constant current of 1-100 mA during testing;

high-voltage insulation resistance test module: the test range is 1M omega-500M omega, and 0.1-5 mA; the dielectric strength performance test is to give an excitation voltage of 50-1500V and measure the leakage current;

automatic switching isolation module: the device is used for automatically accessing or cutting an object to be measured according to a measurement instruction, and completing multi-channel scanning access and cutting under the control of a general I/O interface, thereby realizing electrical isolation between channels during insulation and direct resistance measurement and preventing interference and damage to a low-voltage loop during high-voltage measurement;

general purpose I/O interfaces: the automatic switching isolation module 5 is responsible for controlling the correspondence between the high-voltage insulation resistance measurement module and the low-voltage direct-current resistance test module;

the main control module: the system is responsible for system operation, logic instruction control, data acquisition, storage and operation of the lower computer, and cooperative control and data exchange among the modules and including the upper computer;

a communication module: the communication function of the upper computer and the lower computer is realized;

an alarm module: alarm output for equipment self-checking and measuring process monitoring;

the local display module: a man-machine interaction interface used when the lower computer is used independently;

programming the power supply module: for providing proper voltage or current to the measured object;

special test cable external member: in order to connect the lower computer unit panel interface, the calibrator and the quick connector of the driving mechanism coil group, the two ends of the test cable are quickly connected by adopting aviation plugs;

a calibrator: the device is used for eliminating measurement lead errors and realizing high-precision measurement of low resistance;

the measured object is as follows: comprises a driving mechanism coil group and a calibrator.

Preferably, the calibrator includes matching aviation plug interface and shielding shell, matching aviation plug interface and shielding shell connect, match aviation plug interface inside be provided with insulator and conductor stitch the conductor stitch wear out the insulator and be connected with the lead wire conductor, the lead wire conductor is connected with a plurality of high accuracy measurands, lead wire conductor and high accuracy measurand are located inside the shielding shell.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses, can accomplish the measurement of insulation resistance, dielectric strength and the direct current resistance of nuclear power station actuating mechanism coil assembly with a equipment through adopting this technical scheme, special test cable external member can realize connecting 1 time, and 16 at least passageway data automatic scanning are measured, have solved the precision difference that current manual test exists, inefficiency, testing personnel bear the problem that the irradiation dose is big.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the calibrator of the present invention;

fig. 3 is a circuit diagram of the programming power module of the present invention.

In the figure: 1. a main control module; 2. a general purpose I/O interface; 3. a high voltage insulation resistance test module; 4. a low-voltage direct-current resistance testing module; 5. automatically switching the isolation module; 6. an alarm module; 7. a communication module; 8. a local display module; 9. programming a power supply module; 10. a dedicated test cable kit; 11. testing software for insulation and direct resistance of the upper computer and the driving mechanism; 12. an expert diagnostic module; 13. a calibrator; 14. a drive mechanism coil assembly; 15. a conductor pin; 16. an insulator; 17. a lead conductor; 18. a high-precision object to be measured; 19. a shielding housing; 20. and matching with an aviation plug interface.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a nuclear power station actuating mechanism is insulating and direct resistance testing arrangement, host computer and actuating mechanism are insulating and direct resistance testing software 11 are the actuating mechanism of man-machine interactive operation insulating and direct resistance testing software, and this software can control the observing and controlling action of next machine, sets up test parameter, defines the test object, generates the test report form, judges the test result, preserves test data, and host computer and actuating mechanism are insulating and direct resistance testing software 11 are the soft literature that this company has now. The expert diagnosis module 12 can perform functions of curve drawing, aging analysis, life diagnosis and the like on the test data of all times, and is also an existing soft work of the company. The lower computer is a test unit which can work independently and can run online with the upper computer. The high-voltage insulation resistance test module 3 is designed to test the insulation resistance and the dielectric strength of a tested object, and the programming power supply module 9 can output 50-2500V voltage during testing; the low-voltage direct-current resistance testing module 4 is designed for direct-current resistance testing in a range of 0.01 omega-1M omega, and a programmable power supply can output a constant current of 1-100 mA during testing; high-voltage insulation resistance test module 3: the test range is 1M omega-500M omega, and 0.1-5 mA; the dielectric strength performance test is to give an excitation voltage of 50-1500V and measure the leakage current; the automatic switching isolation module 5 is designed to automatically access or cut off the measured object according to the measurement instruction and complete multi-channel scanning access and cut-off under the control of the general I/O interface; the automatic switching isolation module 5 can realize the electrical isolation between channels during the insulation and direct resistance measurement, and prevent the interference and damage to a low-voltage loop during the high-voltage measurement; the general I/O interface 2 is responsible for controlling the correspondence of the automatic switching isolation module 10, the high-voltage insulation resistance testing module 3 and the low-voltage direct-current resistance measuring module 4; the main control module 1 is responsible for system operation, logic instruction control, data acquisition, storage and operation of a lower computer, and cooperative control and data exchange among modules and including an upper computer; alarm module 6 is used for the alarm output of equipment self-checking, measurement process control, has integrateed communication module 7 simultaneously: the communication function of the upper computer and the lower computer is realized; the local display module 8 is used for a man-machine interaction interface when the lower computer is used independently; the programming power supply module 9 is used for providing proper voltage or current for the tested object; the special test cable kit 10 is designed as a quick connector for connecting a panel interface and a calibrator 13 of a lower computer unit and a coil group 14 of a driving mechanism, and the two ends of the test cable are quickly connected by adopting an aviation plug; the calibrator 13 is used for eliminating measurement lead errors to realize high-precision measurement with low resistance. The measured object comprises a driving mechanism coil group 14 and a calibrator 13; the drive mechanism coil assembly 14 comprises actions such as an electromagnetic coil and a position coil on each drive mechanism and position measurement facilities, the calibrator 13 comprises a matched aviation plug interface and a shielding shell 19, the aviation plug interface 14 and the shielding shell 19 are of an integrated structure, the matched aviation plug interface 14 is connected with the shielding shell 19, an insulator 16 and a conductor pin 15 are arranged inside the matched aviation plug interface 14, the conductor pin 15 penetrates out of the insulator 16 and is connected with a lead conductor 17, the lead conductor 17 is connected with a plurality of high-precision tested objects 18, the lead conductor 17 and the high-precision tested objects 18 are located inside the shielding shell 19, a main control module 1 in the application adopts a PC/104CPU, a control board integrates functions such as calculation, storage, logic control, a communication component and an on-site display interface, and an alarm module 6: the device is used for recording and displaying the abnormal conditions in the running process of the instrument, the overproof parameter measurement results and the prompt of improper operation. Low-voltage direct-current resistance measuring module 4 and high-voltage insulation resistance measuring module 3: the constant current source mode is adopted, the load property is automatically scanned and judged by programming the constant current source output of the power module 9 and the charging and discharging time of the load, the constant current output sizes of the two measurement modes are different, and a proper measuring range is automatically selected, so that the measurement precision of the direct current resistance and the insulation resistance is ensured, and meanwhile, overcurrent and overvoltage are prevented. The dielectric strength performance test is to give a preset excitation voltage by the programmable power supply module 9, and to access the leakage current sampling resistor through the high-voltage isolation circuit, thereby measuring the leakage current of the tested object under the set withstand voltage condition and judging the dielectric performance. Programming the power supply module 9: the high-precision constant current output circuit consists of an adjustable constant voltage source output circuit and a constant current source output circuit, and realizes the high-precision constant current output of 0-100 mA. The special test cable kit 10 is provided for a low-voltage direct-current resistance measurement module and a high-voltage insulation resistance measurement module to use: the electromagnetic coil measuring cable and the position coil measuring cable are provided with aviation plugs at two ends, one end of each aviation plug is connected with a measuring instrument connector, and the other end of each aviation plug is connected with a measured coil connector or a calibrator connector. The measuring cable is provided with a multi-core wire, a shielding sheath is arranged outside the multi-core wire, and the measuring cable is provided with a steel wire bearing certain tensile force.

By adopting the technical scheme, the insulation resistance, the dielectric strength and the direct current resistance of the coil group of the driving mechanism of the nuclear power station can be measured by one device, the special test cable kit can realize 1-time connection, at least 16 channels of data are automatically scanned and measured, and the performance data recording, analysis and report customization output of the coil group of the driving mechanism of the nuclear power station can be completed through upper computer test software. The problems of poor precision, low efficiency and large irradiation dose born by detection personnel in the conventional manual test are solved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (2)

1. The utility model provides a nuclear power station actuating mechanism is insulating with directly hinder testing arrangement which characterized in that includes:

the low-voltage direct current resistance testing module: the test range is 0.01 omega-1M omega, and the programmable power supply can output a constant current of 1-100 mA during testing;

high-voltage insulation resistance test module: the test range is 1M omega-500M omega, and 0.1-5 mA; the dielectric strength performance test is to give an excitation voltage of 50-1500V and measure the leakage current;

automatic switching isolation module: the tested object is automatically accessed or cut off according to the measurement instruction, and multi-channel scanning access and cut-off are completed under the control of the general I/O interface, so that the electrical isolation between channels during insulation and direct resistance measurement is realized;

general purpose I/O interfaces: the automatic switching isolation module (5) is controlled to correspond to the high-voltage insulation resistance measuring module and the low-voltage direct-current resistance testing module;

the main control module: the system is responsible for system operation, logic instruction control, data acquisition, storage and operation of the lower computer, and cooperative control and data exchange among the modules and including the upper computer;

a communication module: the communication function of the upper computer and the lower computer is realized;

an alarm module: alarm output for equipment self-checking and measuring process monitoring;

the local display module: a man-machine interaction interface used when the lower computer is used independently;

programming the power supply module: for providing proper voltage or current to the measured object;

special test cable external member: in order to connect the lower computer unit panel interface, the calibrator and the quick connector of the driving mechanism coil group, the two ends of the test cable are quickly connected by adopting aviation plugs;

a calibrator: the device is used for eliminating measurement lead errors and realizing high-precision measurement of low resistance;

the measured object is as follows: comprises a driving mechanism coil group and a calibrator.

2. The device for testing the insulation and the direct resistance of the driving mechanism of the nuclear power plant as recited in claim 1, wherein: the calibrator is including matching aviation plug interface and shielding shell, it connects to match aviation plug interface and shielding shell, match aviation plug interface inside be provided with insulator and conductor stitch the conductor stitch wear out the insulator and be connected with the lead wire conductor, lead wire conductor and a plurality of high accuracy measurand connect, lead wire conductor and high accuracy measurand are located inside the shielding shell.

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