A comprehensive testing device for relay fuse of instrument control system of nuclear power plant

Abstract

A kind of comprehensive testing device for nuclear power plant control system relay fuse, it is characterized in that: including tester native, special-shaped heat pipe heat dissipation shielding module, magnetic interface conversion module, measured relay / fuse, external computer, external power supply;External power supply, measured relay / fuse, external computer are connected with tester native through shielding layer panel;External power supply powers tester native, external computer issues instruction to control tester native;Magnetic interface conversion module is connected with tester native, shielding layer panel.Connecting with tester native, shielding layer panel through magnetic interface conversion module, the stable and reliable work of relay fuse testing device in strong ionization environment is guaranteed;At the same time, through a series of design, it is guaranteed that the heat dissipation performance and electrical performance of relay fuse testing device are not influenced by shielding measure, the test function and test performance of relay fuse testing device are effectively guaranteed without discount.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant instrumentation and control equipment maintenance. Specifically, it relates to a comprehensive testing device for relays and fuses in nuclear power plant instrumentation and control systems. Background Technology

[0002] Relays and fuses are widely used in the instrumentation and control systems of nuclear power plants, playing a crucial role in implementing control and protection functions. Therefore, failures of relays and fuses can pose a serious threat to the safe and stable operation of nuclear power plants. Performance testing of relays and fuses is therefore a vital step in ensuring the safe and stable operation of nuclear power plants. However, nuclear power plant instrumentation and control systems often operate in environments with strong ionizing radiation. In such environments, the measurement accuracy and testing stability of conventional relay and fuse testing devices are affected. Therefore, there is an urgent need for a comprehensive relay and fuse testing device suitable for environments with strong ionizing radiation.

[0003] The key to ensuring stable operation of the relay and fuse integrated testing device in a strong ionizing radiation environment lies in:

[0004] 1) The relay fuse testing device has ionizing radiation shielding capability;

[0005] 2) The equipment has sufficient heat exchange capacity under fully enclosed shell conditions to ensure that the heat inside the equipment can be dissipated in time and prevent high-temperature aging caused by internal heat accumulation.

[0006] 3) All signals of the relay fuse testing device are connected to the outside through the interface, including: power supply, communication signals, voltage acquisition signals, switch quantity acquisition signals, excitation source, etc. In order to reduce the risk of ionizing radiation and design cost, the number of through interfaces should be kept to a minimum. This invention only designs 4 sets of through interfaces, which are used in conjunction with the internal magnetic interface conversion module to realize the function change of the through interfaces. Summary of the Invention

[0007] The purpose of this invention is to provide a relay and fuse performance testing device that can solve the problems of existing similar testing devices on the market being unsuitable for strong ionizing radiation environments and having limited functionality.

[0008] The technical solution of the present invention is as follows: A comprehensive testing device for relays and fuses in a nuclear power plant control system, characterized in that: it includes a testing instrument, a non-circular heat pipe heat dissipation shielding module, a magnetic interface conversion module, a relay / fuse under test, an external computer, and an external power supply; the external power supply, the relay / fuse under test, and the external computer are connected to the testing instrument through a shielding panel; the external power supply supplies power to the testing instrument, and the external computer sends commands to control the testing instrument; the magnetic interface conversion module is connected to the testing instrument and the shielding panel;

[0009] The test instrument itself includes a heat sink fin, a power supply module, a high-voltage generator module, a voltage amplifier module, a current amplifier module, a data acquisition module, and a control module. The heat sink fin is a fin-shaped heat sink for the internal heat-generating components of the test instrument, which transfers heat from within the instrument through a heat pipe cooling module. The power supply module draws power from an external power source via a shielded panel. The control module communicates and transmits information with an external computer via the shielded panel. The high-voltage generator module generates high voltage. The voltage amplifier module generates AC and DC voltage excitation signals. The current amplifier module generates AC and DC current excitation signals.

[0010] The irregularly shaped heat pipe heat dissipation module includes a hot end, an insulation section, a heat transfer fluid, a wire mesh, a cold end, and a shielding panel; the shielding panel wraps around the hot end and the cold end.

[0011] The data acquisition module is responsible for acquiring test signals from relays and fuses.

[0012] During testing, the tester controls its internal functional modules to complete electrical function configuration according to instructions from the external computer, and controls the magnetic interface conversion module to complete interface conversion according to preset logic, providing excitation signals to the relay / fuse under test, and simultaneously acquiring signals from the relay / fuse under test, so that the tester can obtain the corresponding test data. Then, the tester transmits the processed results to the external computer through the shielding panel.

[0013] The hot end, insulation section, wire mesh, and cold end are filled with heat-conducting fluid for heat transfer. The outer shell of the hot end contacts the corresponding heat sink fins in the testing instrument, introducing heat into the heat-conducting fluid. The heat-conducting fluid evaporates into steam when heated. The steam enters the cold end through the insulation section in the center of the hot end. Subsequently, the steam condenses into liquid in the cold end and returns to the hot end under the action of capillary force of the wire mesh. There is a wire mesh lining between the hot end and the cold end.

[0014] There are 12 hot ends in total, and all hot ends share one cold end.

[0015] The hot end and the insulation section are round tubes. The contact surface between the hot end and the radiator fins is a flat surface to absorb heat from the radiator, while the other end is a smooth round surface to absorb heat from the environment.

[0016] The shielding panel includes a stainless steel layer and a lead layer.

[0017] The shielding panel also includes a power supply through-port, a communication through-port, a coil through-port, and a contact / fuse through-port. The power supply through-port provides a channel for connecting the test unit to an external power source, enabling the test unit to draw power from an external power source. The communication through-port provides a channel for connecting the test unit to an external computer, enabling communication between the test unit and the external computer. The coil through-port provides a channel for connecting the magnetic interface conversion module to the relay coil, enabling the test unit to excite the relay and acquire signals. The contact / fuse through-port provides a channel for connecting the magnetic interface conversion module to the relay contacts or fuses, enabling the test unit to excite the relays or fuses and acquire signals.

[0018] The magnetic interface conversion module includes: signal lines, springs, electromagnetic coils, and magnetic opening and closing contacts.

[0019] Electromagnetic coils also include high-voltage measuring electromagnetic coils, medium-voltage measuring electromagnetic coils, low-voltage measuring electromagnetic coils, switch input electromagnetic coils, switch output electromagnetic coils, insulation testing electromagnetic coils, AC output electromagnetic coils, DC output electromagnetic coils, and slider control electromagnetic coils.

[0020] Magnetic opening and closing contacts include high voltage measurement opening and closing contacts, medium voltage measurement opening and closing contacts, low voltage measurement opening and closing contacts, switch input opening and closing contacts, switch output opening and closing contacts, insulation test opening and closing contacts, AC output opening and closing contacts, DC output opening and closing contacts, ceramic magnetic suction tubes, and magnetic sliding contacts.

[0021] The significant advantages of this invention are: ensuring stable and reliable operation of the relay fuse testing device in a strong ionization environment; and ensuring that the heat dissipation and electrical performance of the relay fuse testing device are not affected by shielding measures through a series of designs, thus effectively guaranteeing that the testing function and performance of the relay fuse testing device are not compromised. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the integrated testing device for relays and fuses in a nuclear power plant control system according to the present invention.

[0023] Figure 2 This is a schematic diagram of the specific structure of the irregularly shaped heat pipe heat dissipation and shielding module 9 in the device;

[0024] Figure 3 This is a schematic diagram of the specific structure of the shielded wiring panel 15 in this device;

[0025] Figure 4 This is a schematic diagram of the specific structure of the magnetic interface conversion module 16 in this device;

[0026] in, Figure 1The components are as follows: 1. Test instrument itself; 2. Heat sink fins; 3. Power supply module; 4. High voltage generator module; 5. Voltage amplifier module; 6. Current amplifier module; 7. Data acquisition module; 8. Control module; 9. Irregularly shaped heat pipe heat dissipation and shielding module; 10. Hot end; 11. Insulation section; 12. Heat transfer fluid; 13. Wire mesh; 14. Cold end; 15. Shielding panel; 16. Magnetic interface conversion module; 17. Relay / fuse under test; 18. External computer; 19. External power supply.

[0027] Figure 2 In the middle section: 10 Hot end, 11 Insulation section, 12 Heat transfer fluid, 13 Wire mesh, 14 Cold end, 15 Shielding panel, 15-1 Stainless steel layer, 15-2 Lead layer;

[0028] Figure 3 In the middle: 15 shielding panel, 15-3 power supply through interface, 15-4 communication through interface, 15-5 coil through interface, 15-6 contact / fuse through interface, 15-7 test cable conductor.

[0029] Figure 4 Medium: 16-1 Signal line, 16-2 Spring, 16-3 High voltage measurement electromagnetic coil, 16-4 Medium voltage measurement electromagnetic coil, 16-5 Low voltage measurement electromagnetic coil, 16-6 Switch input electromagnetic coil, 16-7 Switch output electromagnetic coil, 16-8 Insulation test electromagnetic coil, 16-9 AC output electromagnetic coil, 16-10 DC output electromagnetic coil, 16-11 Slider control electromagnetic coil, 16-12 High voltage measurement on / off contact, 16-13 Medium voltage measurement on / off contact, 16-14 Low voltage measurement on / off contact, 16-15 Switch input on / off contact, 16-16 Switch output on / off contact, 16-17 Insulation test on / off contact, 16-18 AC output on / off contact, 16-19 DC output on / off contact, 16-20 Ceramic magnetic suction tube, 16-21 Magnetic sliding contact. Detailed Implementation

[0030] like Figure 1 As shown, a comprehensive testing device for relays and fuses in a nuclear power plant control system includes: a testing instrument 1, a heat pipe heat dissipation shielding module 9, a magnetic interface conversion module 16, a relay / fuse under test 17, an external computer 18, and an external power supply 19; the external power supply 19, the relay / fuse under test 17, and the external computer 18 are connected to the testing instrument 1 through a shielding panel 15; the external power supply 19 supplies power to the testing instrument 1, and the external computer 18 sends commands to control the testing instrument 1; the magnetic interface conversion module 16 is connected to the testing instrument 1 and the shielding panel 15;

[0031] The test instrument 1 includes a heat sink fin 2, a power supply module 3, a high-voltage generator module 4, a voltage amplifier module 5, a current amplifier module 6, a data acquisition module 7, and a control module 8. The heat sink fin 2 is a fin-shaped heat sink for the internal heat-generating components of the test instrument 1, which transfers heat from the test instrument 1 through the irregularly shaped heat pipe cooling module 9. The power supply module 3 draws power from an external power source 19 via a shielded panel 15. The control module 8 communicates and transmits information with an external computer 18 via the shielded panel 15. The high-voltage generator module 4 generates high voltage to provide conditions for insulation testing. The voltage amplifier module 5 generates AC and DC voltage excitation signals to excite relays. The current amplifier module 6 generates AC and DC current excitation signals to test relays and fuses. The data acquisition module 7 is responsible for acquiring test signals from relays and fuses.

[0032] An external power supply 19, the relay / fuse under test 17, and an external computer 18 are connected to the test instrument 1 via a shielded panel 15. The external power supply 19 supplies power to the test instrument 1, while the external computer 18 issues commands to control the test instrument 1 to perform relay and fuse tests. During testing, the test instrument 1 controls its internal functional modules to complete electrical function configurations according to the commands from the external computer 18. It further controls the magnetic interface conversion module 16 to perform interface conversion according to preset logic, providing excitation signals to the relay / fuse under test 17 and simultaneously acquiring signals from the relay / fuse under test 17, enabling the test instrument 1 to obtain corresponding test data. The processed results are then transmitted from the test instrument 1 to the external computer 18 via the shielded panel 15.

[0033] The irregularly shaped heat pipe heat dissipation module 9 includes: a hot end 10, an insulating section 11, a heat-conducting fluid 12, a wire mesh 13, a cold end 14, and a shielding panel 15. The hot end 10, the insulating section 11, the heat-conducting fluid 12, the wire mesh 13, and the cold end 14 work together to complete the heat exchange of the test instrument 1; the shielding panel 15 is responsible for electromagnetic shielding of the relay fuse integrated test device, ensuring that the test device is not affected by ionizing radiation interference, and also for bridging and transmitting the power, communication, and test signals of the test instrument to the outside world.

[0034] The device comprises 12 hot ends 10, 11 insulating sections, 13 wire mesh, and 14 cold ends, all filled with heat-conducting fluid 12 for heat transfer. Each hot end 10 has a shell that contacts one of the 12 corresponding radiator fins 2 in the testing instrument 1. Heat is conducted into the heat-conducting fluid 12, which evaporates into vapor. The vapor passes through the insulating section 11 to the cold end 14 at the center of the hot end 10, then condenses back into liquid at the cold end 14 and returns to the hot end 10 under the capillary action of the wire mesh 13, thus achieving heat extraction. All hot ends 10 of the irregularly shaped heat pipe share a single cold end 14. A wire mesh 13 lining exists between all hot ends 10 and cold ends 14. The hot end 10 and the insulating section 11 are cylindrical tubes. The contact surface between the hot end 10 and the radiator fins 2 is flat, absorbing heat from the radiator, while the other end is a smooth circular surface, absorbing ambient heat.

[0035] The shielding panel 15 wraps around the hot end 10 and the cold end 14. It adopts a sandwich structure, with the upper and lower outer layers being stainless steel layers 15-1 and the middle layer being lead layers 15-2, achieving all-round shielding. The shielding panel is equipped with multiple through-hole interfaces, including: one power supply through-hole interface 15-3, one communication through-hole interface 15-4, one coil through-hole interface 15-5, and one contact / fuse through-hole interface 15-6. The power supply through-hole interface 15-3 provides a channel for connecting the test unit 1 to the external power supply 19, enabling the test unit 1 to draw power from the external power supply 19. The communication through-hole interface 15-4 provides a channel for connecting the test unit 1 to the external computer 18, enabling communication between the test unit 1 and the external computer 18. The coil through-hole interface 15-5 provides a channel for connecting the magnetic interface conversion module 16 to the relay coil, enabling the test unit 1 to excite the relay and acquire signals. The contact / fuse through-hole interface 15-6 provides a channel for connecting the magnetic interface conversion module 16 to the relay contact or fuse, enabling the test unit 1 to excite the relay or fuse and acquire signals.

[0036] The magnetic interface conversion module 16 includes: one signal line 16-1, one spring 16-2, and eight electromagnetic coils (specifically including: one high-voltage measurement electromagnetic coil 16-3, one medium-voltage measurement electromagnetic coil 16-4, one low-voltage measurement electromagnetic coil 16-5, one digital input electromagnetic coil 16-6, one digital output electromagnetic coil 16-7, one insulation test electromagnetic coil 16-8, one AC output electromagnetic coil 16-9, one DC output electromagnetic coil 16-10, and one slider control electromagnetic coil 16-10). 11) and 8 magnetically attached opening and closing contacts (specifically including: 1 high-voltage measurement opening and closing contact 16-12, 1 medium-voltage measurement opening and closing contact 16-13, 1 low-voltage measurement opening and closing contact 16-14, 1 digital input opening and closing contact 16-15, 1 digital output opening and closing contact 16-16, 1 insulation test opening and closing contact 16-17, 1 AC output opening and closing contact 16-18, 1 DC output opening and closing contact 16-19, 1 ceramic magnetic chuck 16-20, and 1 magnetically attached sliding contact 16-21).

[0037] The aforementioned eight electromagnetic coils for opening and closing contacts, in conjunction with eight magnetically attached opening and closing contacts, jointly achieve contact control, enabling the switching of eight positions. For example, when it is necessary to connect the low-voltage measurement opening and closing contact 16-14, a command is first given to energize the low-voltage measurement electromagnetic coil 16-5, causing the low-voltage measurement opening and closing contact 16-14 to be lifted by magnetic force. Then, a command is given to de-energize the slider control electromagnetic coil 16-11. After de-energization and demagnetization, the magnetically attached sliding contact 16-21 will move towards the initial point under the pulling force of the rear spring 16-2. During the movement, the magnetically attached sliding contact 16-21 will contact the low-voltage measurement opening and closing contact 16-14, thereby achieving channel switching of signal line 1.

[0038] The device uses four magnetic interface conversion modules 16. Each magnetic interface conversion module 16 has eight identical on / off contacts connected to the following functional positions: 1) High voltage measurement position; 2) Medium voltage measurement position; 3) Low voltage measurement position; 4) Switch output position; 5) Switch input position; 6) Insulation test position; 7) AC output position; 8) DC output position. The four magnetic interface conversion modules 16 are respectively connected to the coil through-port 15-5 and the contact / fuse through-port 15-6 on the shielded wiring panel. Each through-port connects to two magnetic interface conversion modules 16 via two wires, thus ensuring the functional switching between the coil through-port and the contact / fuse through-port.

Claims

1. A comprehensive testing device for relays and fuses in a nuclear power plant control system, characterized in that: The test instrument includes a test unit (1), a heat pipe heat dissipation shielding module (9), a magnetic interface conversion module (16), a relay / fuse under test (17), an external computer (18), and an external power supply (19). The external power supply (19), the relay / fuse under test (17), and the external computer (18) are connected to the test unit (1) through the shielding panel (15). The external power supply (19) supplies power to the test unit (1), and the external computer (18) sends commands to control the test unit (1). The magnetic interface conversion module (16) is connected to the test unit (1) and the shielding panel (15). The test instrument (1) includes a heat sink fin (2), a power supply module (3), a high voltage generator module (4), a voltage amplifier module (5), a current amplifier module (6), a data acquisition module (7), and a control module (8). Among them, the heat sink fin (2) is a fin-shaped heat sink for the heat-generating device inside the test instrument (1), which transfers heat from the test instrument (1) through the heat pipe heat dissipation shielding module (9). The power supply module (3) draws power from an external power source (19) through the shielding panel (15). The control module (8) communicates and transmits information with an external computer (18) through the shielding panel (15). The high voltage generator module (4) generates high voltage. The voltage amplifier module (5) generates AC voltage and DC voltage excitation signals. The current amplifier module (6) generates AC current and DC current excitation signals. The irregularly shaped heat pipe heat dissipation shielding module (9) includes a hot end (10), an insulating section (11), a heat-conducting liquid (12), a wire mesh (13), a cold end (14), and a shielding layer panel (15); the shielding layer panel (15) wraps around the hot end (10) and the cold end (14); The hot end (10), the insulating section (11), the wire mesh (13), and the cold end (14) are filled with heat-conducting liquid (12) for heat transfer; the outer shell of the hot end (10) contacts the corresponding heat sink fins (2) in the test instrument (1) to introduce heat into the heat-conducting liquid (12). The heat-conducting liquid (12) evaporates into steam when heated. The steam enters the cold end (14) through the insulating section (11) in the center of the hot end (10). Then the steam condenses into liquid in the cold end (14) and returns to the hot end (10) under the action of capillary force of the wire mesh (13). There is a wire mesh (13) lining between the hot end (10) and the cold end (14). The shielding panel (15) includes a stainless steel layer (15-1) and a lead layer (15-2); The shielding panel (15) also includes a power supply through-port (15-3), a communication through-port (15-4), a coil through-port (15-5), and a contact / fuse through-port (15-6). The power supply through-port (15-3) provides a channel for connecting the test instrument (1) to an external power supply (19), enabling the test instrument (1) to draw power from the external power supply (19). The communication through-port (15-4) provides a channel for connecting the test instrument (1) to an external computer (18), enabling communication between the test instrument (1) and the external computer (18). The coil through-port (15-5) provides a channel for connecting the magnetic interface conversion module (16) to the relay coil, enabling the test instrument (1) to excite the relay and acquire signals. The contact / fuse through-port (15-6) provides a channel for connecting the magnetic interface conversion module (16) to the relay contact or fuse, enabling the test instrument (1) to excite the relay or fuse and acquire signals.

2. The integrated testing device for relays and fuses in a nuclear power plant control system according to claim 1, characterized in that: The data acquisition module (7) is responsible for acquiring test signals from relays and fuses.

3. The integrated testing device for relays and fuses in a nuclear power plant control system according to claim 1, characterized in that: During testing, the tester (1) controls its internal functional modules to complete electrical function configuration according to the instructions of the external computer (18), and controls the magnetic interface conversion module (16) to complete interface conversion according to the preset logic, providing excitation signal to the relay / fuse under test (17), and simultaneously completing signal acquisition of the relay / fuse under test (17), so that the tester (1) obtains the corresponding test data. Then, the tester (1) transmits the processed results to the external computer (18) through the shielding panel (15).

4. The integrated testing device for relays and fuses in a nuclear power plant control system according to claim 1, characterized in that: There are 12 hot ends (10) in total, and all hot ends (10) share a cold end (14).

5. A comprehensive testing device for relays and fuses in a nuclear power plant control system according to claim 1, characterized in that: The hot end (10) and the insulating section (11) are round tubes. The contact surface between the end of the hot end (10) and the fins (2) of the radiator is a plane, which absorbs the heat of the radiator. The other end is a smooth round surface, which absorbs the heat of the environment.

6. The integrated testing device for relays and fuses in a nuclear power plant control system according to claim 1, characterized in that: The magnetic interface conversion module (16) includes: signal line (16-1), spring (16-2), electromagnetic coil and magnetic opening and closing contacts.

7. A comprehensive testing device for relays and fuses in a nuclear power plant control system according to claim 6, characterized in that: The electromagnetic coil also includes a high-voltage measurement electromagnetic coil (16-3), a medium-voltage measurement electromagnetic coil (16-4), a low-voltage measurement electromagnetic coil (16-5), a switch input electromagnetic coil (16-6), a switch output electromagnetic coil (16-7), an insulation test electromagnetic coil (16-8), an AC output electromagnetic coil (16-9), a DC output electromagnetic coil (16-10), and a slider control electromagnetic coil (16-11).

8. A comprehensive testing device for relays and fuses in a nuclear power plant control system according to claim 6, characterized in that: Magnetic opening and closing contacts include high voltage measurement opening and closing contacts (16-12), medium voltage measurement opening and closing contacts (16-13), low voltage measurement opening and closing contacts (16-14), switch input opening and closing contacts (16-15), switch output opening and closing contacts (16-16), insulation test opening and closing contacts (16-17), AC output opening and closing contacts (16-18), DC output opening and closing contacts (16-19), ceramic magnetic suction tubes (16-20), and magnetic sliding contacts (16-21).

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