A device for verifying the functions of a distribution switch

Abstract

The present invention discloses a power distribution switch function verification device, which includes a housing, and a multi-output power supply with at least two output voltages, a closing and opening command unit for simulating a unit to input closing and opening commands to a power distribution switch to be measured, a digital quantity verification unit for verifying whether the power distribution switch to be measured operates normally according to the closing and opening commands, and a phase sequence verification unit for verifying whether the phase sequence connection of the main circuit of the power distribution switch to be measured is correct are provided inside the housing; the present invention has the advantages of reducing the error rate of wiring, being convenient to carry, having accurate and intuitive detection results, high test efficiency and accuracy, simple and reliable circuit structure, comprehensive test functions, etc. It can not only effectively save manpower and material resources, but also ensure the safety and quality of various maintenance tasks during commissioning, and plays a positive role in the maintenance tasks of power distribution switches in nuclear power plants.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment testing, and in particular to a distribution switch function verification device. Background Art

[0002] In every power plant, there are thousands of distribution switches. These distribution switches are not only huge in number, but also have complicated models and control mechanisms, resulting in a huge workload for debugging and maintenance. In the relevant technology, some equipment for testing distribution switches has the following problems: bulky, which makes it inconvenient to carry; single power source type, which cannot meet the special requirements of simultaneous output of multiple types of power sources during the functional test of the distribution switch; complex wiring during use, and it is not convenient to disconnect the wiring of each interface, resulting in a huge workload for installation and removal, an increased probability of human error, and the presence of exposed parts, which can easily cause electric shock to test personnel; the short-circuit required for testing is not convenient to install and disassemble, and is easily missed in the equipment, posing unknown safety hazards; low reliability, high failure rate and other defects. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a distribution switch function verification device in view of at least one defect in the prior art.

[0004] The technical solution adopted by the present invention to solve the technical problem is: construct a distribution switch function verification device, including a shell, and the shell is provided with:

[0005] A multi-output power supply having at least two output voltages;

[0006] An opening and closing command unit is connected to the multi-channel output power supply and can also be connected to the distribution switch under test, and is used to simulate the unit inputting the opening and closing command to the distribution switch under test;

[0007] A switch value verification unit is connected to the multi-channel output power supply and can be connected to the switch value output channel of the tested distribution switch, and is used to verify whether the tested distribution switch operates normally according to the opening and closing instructions;

[0008] The phase sequence verification unit is connected to the multi-channel output power supply and can be connected to the input and output phase lines of the tested distribution switch to verify whether the main circuit phase sequence connection of the tested distribution switch is correct.

[0009] Preferably, the multi-output power supply includes a first voltage conversion unit, a second voltage conversion unit, a third voltage conversion unit, and a first switch S1, a first DC power output interface, a second DC power output interface, a third DC power output interface, a second switch S2 and an AC power output interface arranged on an operating table of the shell;

[0010] The input terminal of the first switch S1 is used to connect to an input power supply. The output terminal of the first switch S1 is connected to the input terminals of the first voltage conversion unit, the second voltage conversion unit, the third voltage conversion unit, and the second switch S2. The output terminal of the first voltage conversion unit is connected to the first DC power output interface. The output terminal of the second voltage conversion unit is connected to the second DC power output interface. The output terminal of the third voltage conversion unit is connected to the third DC power output interface. The output terminal of the second switch S2 is connected to the AC power output interface.

[0011] Preferably, the multi-output power supply further includes a first indicator light L1, a second indicator light L2, a third indicator light L3, a fourth indicator light L4, and a fifth indicator light L5 arranged on the console.

[0012] The first DC power output interface is connected in parallel with the second indicator light L2. The second DC power output interface is connected in parallel with the third indicator light L3. The third DC power output interface is connected in parallel with the fourth indicator light L4. The fifth indicator light L5 is connected in parallel with the output terminal of the first switch S1. The first indicator light L1 is connected in parallel with the output terminal of the second switch S2.

[0013] Preferably, the multi-output power supply further includes a first fuse F1, a second fuse F2, a third fuse F3, a fourth fuse F4, a fifth fuse F5, and a sixth fuse F6.

[0014] The positive output terminal of the first voltage conversion unit is connected to the positive output terminal of the first DC power output interface via the first fuse F1. The negative output terminal of the first voltage conversion unit is connected to the negative output terminal of the first DC power output interface via the second fuse F2. The positive output terminal of the second voltage conversion unit is connected to the positive output terminal of the second DC power output interface via the third fuse F3. The negative output terminal of the second voltage conversion unit is connected to the negative output terminal of the second DC power output interface via the fourth fuse F4. The positive output terminal of the third voltage conversion unit is connected to the positive output terminal of the third DC power output interface via the fifth fuse F5. The negative output terminal of the third voltage conversion unit is connected to the negative output terminal of the third DC power output interface via the sixth fuse F6.

[0015] Preferably, the phase sequence verification unit includes a phase sequence display unit arranged on the console and a phase sequence wheel measurement unit. The phase sequence display unit is connected to the phase sequence wheel measurement unit. The phase sequence wheel measurement unit is also connected to the multi-output power supply.

[0016] Preferably, the phase sequence display unit includes four indicator lamp circuits; each indicator lamp circuit includes a phase sequence input indicator lamp, a live wire to be measured input interface, a live wire to be measured output interface, and a phase sequence output indicator lamp;

[0017] The input end of the phase sequence input indicator lamp is connected to the phase sequence wheel measurement unit as the test instruction input end of the indicator lamp circuit, the output end of the phase sequence input indicator lamp is connected to the live wire to be measured input interface, and the live wire to be measured output interface is connected to the negative pole of the second DC power supply through the phase sequence output indicator lamp.

[0018] Preferably, the phase sequence wheel measurement unit includes a first relay KA1, a first time-delay relay KT1, a second relay KA2, a second time-delay relay KT2, a third relay KA3, a third time-delay relay KT3, a fourth relay KA4, a fourth time-delay relay KT4, and a phase sequence verification switch P9 provided on the console;

[0019] The first end of the phase sequence verification switch P9 is connected to the positive output end of the third DC power supply output interface, the second end of the phase sequence verification switch P9 is connected to the first end of the normally-closed contact circuit KT41 of the fourth time-delay relay KT4, the second end of the normally-closed contact circuit KT41 of the fourth time-delay relay KT4 is connected to the first end of the excitation coil of the first relay KA1, the first end of the excitation coil of the first time-delay relay KT1, the first end of the normally-open contact circuit KA11 of the first relay KA1, the first end of the normally-open contact circuit KA21 of the second relay KA2, and the first end of the normally-open contact circuit KA31 of the third relay KA3, and the second ends of the excitation coils of the first relay KA1 and the first time-delay relay KT1 are connected to the negative output end of the third DC power supply output interface;

[0020] The second end of the first normally open contact circuit KA11 of the first relay KA1 is connected to the negative output terminal of the third DC power supply output interface through the normally open contact circuit KT11 of the first time-delay relay KT1 and the exciting coil of the second relay KA2. The exciting coil of the second time-delay relay KT2 is connected in parallel with the exciting coil of the second relay KA2. The second end of the first normally open contact circuit KA21 of the second relay KA2 is connected to the negative output terminal of the third DC power supply output interface through the normally open contact circuit KT21 of the second time-delay relay KT2 and the exciting coil of the third relay KA3. The exciting coil of the third time-delay relay KT3 is connected in parallel with the exciting coil of the third relay KA3. The second end of the first normally open contact circuit KA31 of the third relay KA3 is connected to the negative output terminal of the third DC power supply output interface through the normally open contact circuit KT31 of the third time-delay relay KT3 and the exciting coil of the fourth relay KA4. The exciting coil of the fourth time-delay relay KT4 is connected in parallel with the exciting coil of the fourth relay KA4;

[0021] The first end of the second normally open contact circuit KA12 of the first relay KA1, the first end of the second normally open contact circuit KA22 of the second relay KA2, the first end of the second normally open contact circuit KA32 of the third relay KA3, and the first end of the normally open contact circuit KA42 of the fourth relay KA4 are connected to the positive output terminal of the second DC power supply output interface. The second ends of the second normally open contact circuit KA12 of the first relay KA1, the second ends of the second normally open contact circuit KA22 of the second relay KA2, the second ends of the second normally open contact circuit KA32 of the third relay KA3, and the second ends of the normally open contact circuit KA42 of the fourth relay KA4 are respectively connected to the test instruction input ends of the four indicator lamp circuits in one-to-one correspondence.

[0022] Preferably, the switching-on and switching-off instruction unit includes a first switching-on and switching-off instruction unit for simulating the generation of a passive switching-on and switching-off instruction by the unit and a second switching-on and switching-off instruction unit for simulating the generation of an active switching-on and switching-off instruction by the unit.

[0023] Preferably, the first switching-on and switching-off instruction unit includes a plurality of self-locking switch circuits and non-self-locking switch circuits;

[0024] Each of the self-locking switch circuits includes a first interface, a first self-locking switch button, and a second interface provided on the console; the first interface is connected to the second interface through the first self-locking switch button;

[0025] Each of the non-self-locking switch circuits includes a third interface, a first switch button, and a fourth interface provided on the console; the third interface is connected to the fourth interface through the first switch button.

[0026] Preferably, the second closing and opening command unit includes a closing and opening command common ground interface provided on the operation table, several second self-locking switch buttons, second switch buttons, and a command output interface;

[0027] The input ends of the second self-locking switch buttons and the second switch buttons are connected to the positive output end of the third DC power supply output interface, the output ends of the second self-locking switch buttons and the second switch buttons are respectively and correspondingly connected to the command output interface, and the closing and opening command common ground interface is connected to the negative output end of the third DC power supply output interface.

[0028] Preferably, the digital input verification unit includes a digital input common ground interface provided on the operation table of the housing, several digital input indicator lights, and a digital input interface;

[0029] The input ends of the digital input indicator lights are connected to the positive output end of the third DC power supply output interface, the output ends of the digital input indicator lights are respectively and correspondingly connected to the digital input interface, and the digital input common ground interface is connected to the negative output end of the third DC power supply output interface.

[0030] Preferably, the distribution switch function verification device further includes a short-circuit unit, which includes several short-circuit loops; each of the short-circuit loops includes two short-circuit interfaces provided on the operation table; one short-circuit interface is connected to the other short-circuit interface.

[0031] The present invention has at least the following beneficial effects: providing a distribution switch function verification device for testing the functions of a distribution switch; the device has a multi-output power supply with multi-output voltages, avoiding carrying various power supplies to the site for testing; using the closing and opening command unit to simulate the unit to input the closing and opening commands into the distribution switch to be tested, and then cooperating with the digital input verification unit to verify whether the distribution switch to be tested operates normally according to the closing and opening commands, making the test results intuitive and accurate; the phase sequence of the main circuit of the distribution switch to be tested can also be detected through the phase sequence verification unit; it can meet the requirements for various test power supplies during the distribution switch function test to the greatest extent; the connection between each unit and the distribution switch to be tested can be realized through an interface with quick connection and disconnection, reducing the wiring error rate; each unit is arranged in a housing to form an integrated structure, which is convenient to carry; and the test results are accurate and intuitive, effectively improving the test efficiency and accuracy of the distribution switch; it also has the advantages of simple and reliable circuit structure, comprehensive test functions, etc.; implementing the present invention can not only effectively save manpower and material resources, but also ensure the safety and quality of various maintenance tasks during commissioning, and play a positive role in the distribution switch maintenance tasks of nuclear power plants. Description of the Drawings

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In the drawings:

[0033] Figure 1 is a schematic structural diagram of a power distribution switch function verification device provided by the present invention;

[0034] Figure 2 is a circuit diagram of a multi-output power supply in the power distribution switch function verification device provided by the present invention;

[0035] Figure 3 is the circuit of the closing and opening command unit in the power distribution switch function verification device provided by the present invention Figure 1 ;

[0036] Figure 4 is the circuit of the closing and opening command unit in the power distribution switch function verification device provided by the present invention Figure 2 ;

[0037] Figure 5 is a circuit diagram of the digital input / output verification unit in the power distribution switch function verification device provided by the present invention;

[0038] Figure 6 is a circuit diagram of the phase sequence verification unit in the power distribution switch function verification device provided by the present invention;

[0039] Figure 7 is a circuit diagram of the short-circuit unit in the power distribution switch function verification device provided by the present invention;

[0040] Figure 8 is a schematic diagram of the operating platform of the housing in the power distribution switch function verification device provided by the present invention;

[0041] Figure 9 is a schematic structural diagram of the housing in the power distribution switch function verification device provided by the present invention. Detailed Embodiments

[0042] In order to have a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0043] Referring to Figure 1 , the present invention provides a power distribution switch function verification device for verifying whether the functions of various types of power distribution switches in a nuclear power plant are normal. The device includes a housing, and a multi-output power supply 1, a closing and opening command unit 2, a digital input / output verification unit 3, and a phase sequence verification unit 4 are provided inside the housing.

[0044] The multi-output power supply 1 has at least two output voltages to provide multiple input power supplies required for testing the power distribution switch. In some embodiments, such as Figure 2 and Figure 8As shown in the figure, the multi-output power supply 1 includes a first voltage conversion unit 11, a second voltage conversion unit 12, a third voltage conversion unit 13, and a first switch S1, a first DC power output interface 14, a second DC power output interface 15, a third DC power output interface 16, a second switch S2, and an AC power output interface 17 arranged on the operation table (the top surface of the housing) of the housing. The first voltage conversion unit 11 is used to convert the input power mains into a DC power supply with a first DC voltage of 220V, the second voltage conversion unit 12 is used to convert the input power into a DC power supply with a second DC voltage of 48V, and the third voltage conversion unit 13 is used to convert the input power into a DC power supply with a third DC voltage of 24V. The AC power supply corresponds to the input power. In addition, the first voltage conversion unit 11, the second voltage conversion unit 12, and the third voltage conversion unit 13 can be AC-DC voltage converters commonly used in the prior art.

[0045] Specifically, the input end of the first switch S1 is used to connect to the input power supply, and the output end of the first switch S1 is connected to the input ends of the first voltage conversion unit 11, the second voltage conversion unit 12, the third voltage conversion unit 13, and the second switch S2. Closing the first switch S1 enables each voltage conversion unit to obtain the working power supply. The output end of the first voltage conversion unit 11 is connected to the first DC power output interface 14, the output end of the second voltage conversion unit 12 is connected to the second DC power output interface 15, the output end of the third voltage conversion unit 13 is connected to the third DC power output interface 16, and the output end of the second switch S2 is connected to the AC power output interface 17.

[0046] As Figure 2 and Figure 8 shown in the figure, in some embodiments, the multi-output power supply 1 further includes a first indicator light L1, a second indicator light L2, a third indicator light L3, a fourth indicator light L4, and a fifth indicator light L5 arranged on the operation table. Specifically, the first DC power output interface 14 is connected in parallel with the second indicator light L2, and the second indicator light L2 will be lit when the first voltage conversion unit 11 is working properly; the second DC power output interface 15 is connected in parallel with the third indicator light L3, and the second indicator light L2 will be lit when the second voltage conversion unit 12 is working properly; the third DC power output interface 16 is connected in parallel with the fourth indicator light L4, and the fourth indicator light L4 will be lit when the third voltage conversion unit 13 is working properly; the fifth indicator light L5 is connected in parallel with the output end of the first switch S1, and the fifth indicator light L5 will be lit when the first switch S1 is closed; the first indicator light L1 is connected in parallel with the output end of the second switch S2, and the first indicator light L1 will be lit when the AC power supply is output normally.

[0047] As Figure 2As shown, in some embodiments, the multi-output power supply 1 further includes a first fuse F1, a second fuse F2, a third fuse F3, a fourth fuse F4, a fifth fuse F5, and a sixth fuse F6. Specifically, the positive output terminal of the first voltage conversion unit 11 is connected to the positive output terminal of the first DC power output interface 14 via the first fuse F1, and the negative output terminal of the first voltage conversion unit 11 is connected to the negative output terminal of the first DC power output interface 14 via the second fuse F2. The positive output terminal of the second voltage conversion unit 12 is connected to the positive output terminal of the second DC power output interface 15 via the third fuse F3, and the negative output terminal of the second voltage conversion unit 12 is connected to the negative output terminal of the second DC power output interface 15 via the fourth fuse F4. The positive output terminal of the third voltage conversion unit 13 is connected to the positive output terminal of the third DC power output interface 16 via the fifth fuse F5, and the negative output terminal of the third voltage conversion unit 13 is connected to the negative output terminal of the third DC power output interface 16 via the sixth fuse F6.

[0048] As Figure 1 shown, the switching instruction unit 2 is connected to the multi-output power supply 1 and can also be connected to the distribution switch to be measured. The switching instruction unit 2 is used to simulate the unit to input the switching instruction into the distribution switch to be measured, so that the staff can control its opening or closing action at the installation site of the distribution switch to be measured.

[0049] As Figure 3 and Figure 4 shown, in some embodiments, the switching instruction unit 2 includes a first switching instruction unit 21 for simulating the unit to generate a passive switching instruction and a second switching instruction unit 22 for simulating the unit to generate an active switching instruction. Among them, the passive switching instruction is applicable to some distribution switches that need to short-circuit the corresponding two instruction input terminals to generate the switching instruction, and the active switching instruction is applicable to some distribution switches that need to input a predetermined voltage to the instruction input terminal to generate the switching instruction.

[0050] In some embodiments, as Figure 3 and Figure 8 shown, the first switching instruction unit 21 includes a plurality of self-locking switch circuits 211 and non-self-locking switch circuits 212. Each self-locking switch circuit 211 includes a first interface 2111, a first self-locking switch button 2112, and a second interface 2113 arranged on the console. The first interface 2111 is connected to the second interface 2113 via the first self-locking switch button 2112. Each non-self-locking switch circuit 212 includes a third interface 2121, a first switch button 2122, and a fourth interface 2123 arranged on the console. The third interface 2121 is connected to the fourth interface 2123 via the first switch button 2122.

[0051] Further, in some embodiments, as Figure 3 shown, the first closing and opening command unit 21 includes three self-locking switch circuits 211 and three non-self-locking switch circuits 212.

[0052] In some embodiments, as Figure 4 shown, the second closing and opening command unit 22 includes a closing and opening command common ground interface 221 provided on the console, as well as a number of second self-locking switch buttons 222, second switch buttons 223, and command output interfaces 224; the input ends of the second self-locking switch buttons 222 and the second switch buttons 223 are connected to the positive output end of the third DC power output interface 16, the output ends of the second self-locking switch buttons 222 and the second switch buttons 223 are respectively and correspondingly connected to the command output interfaces 224, and the closing and opening command common ground interface 221 is connected to the negative output end of the third DC power output interface 16.

[0053] Further, in some embodiments, as Figure 4 shown, the second closing and opening command unit 22 includes three second self-locking switch buttons 222, three second switch buttons 223, and six command output interfaces 224.

[0054] The working principle of the second closing and opening command unit 22 is as follows: taking a certain distribution switch that generates a closing and opening command by exciting its corresponding relay as an example, connect the command output interface 224 to the power supply end of the exciting coil of the corresponding relay, and press the second self-locking switch button 222 or the second switch button 223, then the corresponding relay can be excited, thereby generating a closing and opening command.

[0055] In addition, the self-locking switch button means that the first self-locking switch button and the second self-locking switch button are applicable to the situation where the closing and opening command generated when the button is closed takes effect, and the generation of the closing and opening command immediately stops when the button is disconnected; while the ordinary switch button means that the first switch button and the second switch button are applicable to the situation where the closing and opening command generated after the button is closed makes the gate act, and even if the button is turned off, it will not affect the state of the gate at this time. For example, when the gate receives a opening command, it will open, and even if the opening command disappears, it will not switch back to the closing state, but needs to receive a closing command before it can close.

[0056] As Figure 1 shown, the digital quantity verification unit 3 is connected to the multi-output power supply 1, and can be connected to the digital quantity output channel of the distribution switch to be measured. The digital quantity verification unit 3 is used to verify whether the distribution switch to be measured operates normally according to the closing and opening command.

[0057] As Figure 5 and Figure 8As shown, in some embodiments, the digital quantity verification unit 3 includes a digital quantity common ground interface 31 provided on the operation platform of the housing, and a plurality of digital quantity indicator lights 32 and digital quantity input interfaces 33; the input ends of the digital quantity indicator lights 32 are connected to the positive output end of the third DC power output interface 16, the output ends of the digital quantity indicator lights 32 are respectively and correspondingly connected to the digital quantity input interfaces 33, and the digital quantity common ground interface 31 is connected to the negative output end of the third DC power output interface 16.

[0058] Further, as Figure 5 shown, in some embodiments, the digital quantity verification unit 3 includes six digital quantity indicator lights 32 and six digital quantity input interfaces 33.

[0059] Referring to Figure 5 , the working principle of the digital quantity verification unit 3 is as follows: Taking a digital quantity output by the distribution switch to be measured as an example, the two ends of the digital quantity output channel are respectively connected to the digital quantity input interface 33 and the digital quantity common ground interface 31. When the distribution switch to be measured receives a closing or opening command and operates, its digital quantity output channel is closed, and the digital quantity indicator light 32 connected to the digital quantity input interface 33 is lit, so as to intuitively display that the control function of the digital quantity is normal.

[0060] As Figure 1 shown, the phase sequence verification unit 4 is connected to the multi-output power supply 1 and can be connected to the input and output phase lines of the distribution switch to be measured. The phase sequence verification unit 4 is used to verify whether the phase sequence connection of the main circuit of the distribution switch to be measured is correct.

[0061] As Figure 6 and Figure 8 shown, in some embodiments, the phase sequence verification unit 4 includes a phase sequence display unit 41 provided on the operation platform and a phase sequence wheel measurement unit 42; the phase sequence display unit 41 is connected to the phase sequence wheel measurement unit 42, and the phase sequence wheel measurement unit 42 is also connected to the multi-output power supply 1.

[0062] Further, as Figure 6As shown, in some embodiments, the phase sequence display unit 41 includes four indicator lamp circuits 411; each indicator lamp circuit 411 includes a phase sequence input indicator lamp 4111, a live wire to be measured input interface 4112, a live wire to be measured output interface 4113, and a phase sequence output indicator lamp 4114. The input end of the phase sequence input indicator lamp 4111 is connected to the phase sequence measurement unit 42 as the test instruction input end of the indicator lamp circuit 411, the output end of the phase sequence input indicator lamp 4111 is connected to the live wire to be measured input interface 4112, and the live wire to be measured output interface 4113 is connected to the negative pole of the second DC power supply through the phase sequence output indicator lamp 4114. For the same indicator lamp circuit 411, the live wire to be measured input interface 4112 is used to connect to the input side of a live wire in the distribution switch to be measured, and the live wire to be measured output interface 4113 is used to connect to the output side of this live wire.

[0063] Further, as Figure 6 and Figure 8 shown, in some embodiments, the phase sequence measurement unit 42 includes a first relay KA1, a first time-delay relay KT1, a second relay KA2, a second time-delay relay KT2, a third relay KA3, a third time-delay relay KT3, a fourth relay KA4, a fourth time-delay relay KT4, and a phase sequence verification switch P9 provided on the operation console. Among them, the time-delay relay is a relay that controls the opening and closing of its contact circuit after a preset time after being energized or de-energized.

[0064] The first end of the phase sequence verification switch P9 is connected to the positive output end of the third DC power supply output interface 16, the second end of the phase sequence verification switch P9 is connected to the first end of the normally closed contact circuit KT41 of the fourth time-delay relay KT4, and the second end of the normally closed contact circuit KT41 of the fourth time-delay relay KT4 is connected to the first end of the excitation coil of the first relay KA1, the first end of the excitation coil of the first time-delay relay KT1, the first end of the normally open contact circuit KA11 of the first relay KA1, the first end of the normally open contact circuit KA21 of the second relay KA2, and the first end of the normally open contact circuit KA31 of the third relay KA3. The second end of the excitation coil of the first relay KA1 and the second end of the excitation coil of the first time-delay relay KT1 are connected to the negative output end of the third DC power supply output interface 16;

[0065] The second terminal of the first normally open contact circuit KA11 of the first relay KA1 is connected to the negative output terminal of the third DC power supply output interface 16 through the normally open contact circuit KT11 of the first time-delay relay KT1 and the excitation coil of the second relay KA2. The excitation coil of the second time-delay relay KT2 is connected in parallel with the excitation coil of the second relay KA2. The second terminal of the first normally open contact circuit KA21 of the second relay KA2 is connected to the negative output terminal of the third DC power supply output interface 16 through the normally open contact circuit KT21 of the second time-delay relay KT2 and the excitation coil of the third relay KA3. The excitation coil of the third time-delay relay KT3 is connected in parallel with the excitation coil of the third relay KA3. The second terminal of the first normally open contact circuit KA31 of the third relay KA3 is connected to the negative output terminal of the third DC power supply output interface 16 through the normally open contact circuit KT31 of the third time-delay relay KT3 and the excitation coil of the fourth relay KA4. The excitation coil of the fourth time-delay relay KT4 is connected in parallel with the excitation coil of the fourth relay KA4;

[0066] The first terminal of the second normally open contact circuit KA12 of the first relay KA1, the first terminal of the second normally open contact circuit KA22 of the second relay KA2, the first terminal of the second normally open contact circuit KA32 of the third relay KA3, and the first terminal of the normally open contact circuit KA42 of the fourth relay KA4 are connected to the positive output terminal of the second DC power supply output interface 15. The second terminals of the second normally open contact circuit KA12 of the first relay KA1, the second normally open contact circuit KA22 of the second relay KA2, the second normally open contact circuit KA32 of the third relay KA3, and the second terminal of the normally open contact circuit KA42 of the fourth relay KA4 are respectively connected to the test instruction input terminals of the four indicator lamp circuits 411 in one-to-one correspondence.

[0067] Reference Figure 6 , take a test example of the phase sequence verification unit 4:

[0068] Such as Figure 6 As shown, the four indicator lamp circuits 411 include a first phase sequence detection circuit 411n for connecting the N-phase line of the distribution switch to be tested, a second phase sequence detection circuit 411a for connecting the A-phase line of the distribution switch to be tested, a third phase sequence detection circuit 411b for connecting the B-phase line of the distribution switch to be tested, and a fourth phase sequence detection circuit 411c for connecting the C-phase line of the distribution switch to be tested. Ensure that the control switches of each phase line of the distribution switch to be tested are closed during the test;

[0069] When all phase lines of the distribution switch under test are correctly connected, press the phase sequence verification switch P9. For the N phase line of the distribution switch under test, the first relay KA1 is energized, and the second normally open contact circuit KA12 of the first relay KA1 is closed, enabling the second DC power supply to form a conduction circuit through the second normally open contact circuit KA12 of the first relay KA1, the phase sequence input indicator N1, the control switch of the N phase line of the distribution switch under test, and the phase sequence output indicator N2. The phase sequence input indicator N1 and the phase sequence output indicator N2 will be lit simultaneously to visually indicate that the N phase line is correctly connected. When the first relay KA1 is energized, it will also cause the first normally open contact circuit KA11 of the first relay KA1 to be energized, and the first time-delay relay KT1 is also energized. The normally open contact circuit KT11 of the first time-delay relay KT1 closes after a predetermined time (which can be set to 2 seconds), enabling the second relay KA2 and the second time-delay relay KT2 to be energized. By the same principle as the N phase line, finally, the phase sequence input indicator A1 and the phase sequence output indicator A2 will be lit simultaneously to indicate that the A phase line is correctly connected. It can be understood that the phase sequence input indicators and phase sequence output indicators in the third phase sequence detection circuit 411b and the fourth phase sequence detection circuit 411c will also be lit sequentially based on the above rules. However, it should be noted that after the fourth time-delay relay KT4 is energized, its normally closed contact circuit KT41 will be disconnected after a predetermined time, causing the fourth time-delay relay KT4 to lose magnetism, and the normally closed contact circuit KT41 will close, entering the next phase sequence detection cycle. In summary, when the phase sequence is correctly connected, the phase sequence input indicator and the phase sequence output indicator of the same phase sequence detection circuit will be lit simultaneously, and each phase sequence detection circuit is lit sequentially based on a predetermined time difference.

[0070] It can be understood that if there is a wrong connection on the phase line output side of the distribution switch under test. Suppose during the test process, when the second normally open contact circuit KA22 of the second relay KA2 is closed, the phase sequence input indicator A1 and the phase sequence output indicator B2 are lit simultaneously, indicating that the A phase line output side of the distribution switch under test is connected to the B phase line output side. After a predetermined time, the second normally open contact circuit KA32 of the third relay KA3 is closed. If the phase sequence input indicator B1 and the phase sequence output indicator A2 are lit simultaneously, it means that the output sides of the A phase line and the B phase line of the distribution switch under test are reversed. If the phase sequence input indicator B1 and the phase sequence output indicator C2 are lit simultaneously, it means that the B phase line output side of the distribution switch under test is connected to the C phase line output side. Further, it can be deduced that the C phase line output side is connected to the A phase line output side.

[0071] It can be understood that for other wrong connection situations, they can also be accurately tested based on the above principle, which will not be elaborated one by one here.

[0072] In some embodiments, the power distribution switch function verification device further includes a short - circuit unit. The short - circuit unit is used to provide a short - circuit interface, so as to achieve quick disconnection and connection of the ports or connecting wires that need to be short - circuited during testing. At the same time, the short - circuit unit can be compatible with the same type of power distribution switch, providing convenience for testing. Further, as Figure 7 and Figure 8 shown, the short - circuit unit includes a number of short - circuit loops 51. The short - circuit loops 51 are used to provide a convenient short - circuit interface when short - circuit wires are needed during testing, so as to achieve the effect of plug - and - play. Each short - circuit loop 51 includes two short - circuit interfaces 511 arranged on the operation table; one short - circuit interface 511 is connected to the other short - circuit interface 511. Further, in some embodiments, the short - circuit unit includes six short - circuit loops 51.

[0073] As Figure 9 shown, in some embodiments, the housing can be a flip - type box body. Opening the flip of the box body allows the operation table to be operated. It can be understood that the connection between each unit of the present invention and the power distribution switch to be tested can be realized through quick - disconnection and connection interfaces. Each unit is arranged in the housing to form an integrated structure, which is convenient to carry.

[0074] The present invention has at least the following beneficial effects: providing a power distribution switch function verification device for testing the functions of a power distribution switch; the device has a multi - output power supply with multi - output voltages, avoiding the need to carry various power supplies to the site for testing; using the opening and closing command unit to simulate the unit to input the opening and closing commands into the power distribution switch to be tested, and then cooperating with the digital input / output verification unit to verify whether the power distribution switch to be tested operates normally according to the opening and closing commands, making the test results intuitive and accurate; the phase sequence verification unit can also be used to detect whether the main circuit phase sequence connection of the power distribution switch to be tested is correct; it can meet the requirements of various test power supplies during the power distribution switch function test to the greatest extent; the connection between each unit and the power distribution switch to be tested can be realized through interfaces with quick connection and disconnection, reducing the wiring error rate; each unit is arranged in the housing to form an integrated structure, which is convenient to carry; and the test results of each item are accurate and intuitive, effectively improving the test efficiency and accuracy of the power distribution switch; it also has the advantages of simple and reliable circuit structure, comprehensive test functions, etc.; implementing the present invention can not only effectively save manpower and material resources, but also ensure the safety and quality of various maintenance tasks during commissioning, playing a positive role in the maintenance tasks of power distribution switches in nuclear power plants.

[0075] It can be understood that the above embodiments only represent the preferred embodiments of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several modifications and improvements can also be made, which all fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A power distribution switch function verification device, characterized in that, Comprising a housing, and provided within the housing are: A multi-output power supply (1) having at least two output voltages, for providing a regulated DC power supply and an AC power supply required for testing a distribution switch; A closing and opening command unit (2), connected to the multi-output power supply (1), for connecting to the distribution switch under test, so as to simulate that a unit inputs a closing and opening command to the distribution switch under test; A digital quantity verification unit (3), connected to the multi-output power supply (1), for the digital quantity output channel of the distribution switch under test, so as to verify whether the distribution switch under test operates normally according to the closing and opening command; A phase sequence verification unit (4), connected to the multi-output power supply (1), for connecting the input and output phase lines of the distribution switch under test, so as to verify whether the phase sequence connection of the main circuit of the distribution switch under test is correct; The phase sequence verification unit (4) includes a phase sequence display unit (41) provided on an operation platform, and a phase sequence wheel measurement unit (42); the phase sequence display unit (41) is connected to the phase sequence wheel measurement unit (42), and the phase sequence wheel measurement unit (42) is further connected to the multi-output power supply (1); The phase sequence display unit (41) includes four indicator lamp circuits (411); each indicator lamp circuit (411) includes a phase sequence input indicator lamp (4111), a phase line to be measured input interface (4112), a phase line to be measured output interface (4113), and a phase sequence output indicator lamp (4114); The input end of the phase sequence input indicator lamp (4111) serves as the test command input end of the indicator lamp circuit (411) and is connected to the phase sequence wheel measurement unit (42), the output end of the phase sequence input indicator lamp (4111) is connected to the phase line to be measured input interface (4112), and the phase line to be measured output interface (4113) is connected to the negative pole of a second DC power supply via the phase sequence output indicator lamp (4114).

2. The power distribution switch function verification device according to claim 1, characterized in that The multi-output power supply (1) includes a first voltage conversion unit (11), a second voltage conversion unit (12), a third voltage conversion unit (13), and a first switch S1, a first DC power supply output interface (14), a second DC power supply output interface (15), a third DC power supply output interface (16), a second switch S2, and an AC power supply output interface (17) provided on the operation platform of the housing; The input end of the first switch S1 is used to connect to an input power supply, the output end of the first switch S1 is connected to the input ends of the first voltage conversion unit (11), the second voltage conversion unit (12), the third voltage conversion unit (13), and the second switch S2, the output end of the first voltage conversion unit (11) is connected to the first DC power supply output interface (14), the output end of the second voltage conversion unit (12) is connected to the second DC power supply output interface (15), the output end of the third voltage conversion unit (13) is connected to the third DC power supply output interface (16), and the output end of the second switch S2 is connected to the AC power supply output interface (17).

3. The power distribution switch function verification device according to claim 2, characterized in that The multi-output power supply (1) further includes a first indicator light L1, a second indicator light L2, a third indicator light L3, a fourth indicator light L4, and a fifth indicator light L5 arranged on the operation table; The first DC power output interface (14) is connected in parallel with the second indicator light L2, the second DC power output interface (15) is connected in parallel with the third indicator light L3, the third DC power output interface (16) is connected in parallel with the fourth indicator light L4, the fifth indicator light L5 is connected in parallel with the output end of the first switch S1, and the first indicator light L1 is connected in parallel with the output end of the second switch S2.

4. The power distribution switch function verification device according to claim 3, characterized in that, The multi-output power supply (1) further includes a first fuse F1, a second fuse F2, a third fuse F3, a fourth fuse F4, a fifth fuse F5, and a sixth fuse F6; The positive output end of the first voltage conversion unit (11) is connected to the positive output end of the first DC power output interface (14) through the first fuse F1, the negative output end of the first voltage conversion unit (11) is connected to the negative output end of the first DC power output interface (14) through the second fuse F2, the positive output end of the second voltage conversion unit (12) is connected to the positive output end of the second DC power output interface (15) through the third fuse F3, the negative output end of the second voltage conversion unit (12) is connected to the negative output end of the second DC power output interface (15) through the fourth fuse F4, the positive output end of the third voltage conversion unit (13) is connected to the positive output end of the third DC power output interface (16) through the fifth fuse F5, and the negative output end of the third voltage conversion unit (13) is connected to the negative output end of the third DC power output interface (16) through the sixth fuse F6.

5. The power distribution switch function verification device according to claim 4, characterized in that The phase sequence detection unit (42) includes a first relay KA1, a first time-delay relay KT1, a second relay KA2, a second time-delay relay KT2, a third relay KA3, a third time-delay relay KT3, a fourth relay KA4, a fourth time-delay relay KT4, and a phase sequence verification switch P9 arranged on the operation table; The first end of the phase sequence verification switch P9 is connected to the positive output end of the third DC power supply output interface (16). The second end of the phase sequence verification switch P9 is connected to the first end of the normally closed contact loop KT41 of the fourth time-delay relay KT4. The second end of the normally closed contact loop KT41 of the fourth time-delay relay KT4 is connected to the first end of the exciting coil of the first relay KA1, the first end of the exciting coil of the first time-delay relay KT1, the first end of the normally open contact loop KA11 of the first relay KA1, the first end of the normally open contact loop KA21 of the second relay KA2, and the first end of the normally open contact loop KA31 of the third relay KA3. The second ends of the exciting coils of the first relay KA1 and the first time-delay relay KT1 are connected to the negative output end of the third DC power supply output interface (16); The second end of the first normally open contact loop KA11 of the first relay KA1 is connected to the negative output end of the third DC power supply output interface (16) through the normally open contact loop KT11 of the first time-delay relay KT1 and the exciting coil of the second relay KA2. The exciting coil of the second time-delay relay KT2 is connected in parallel with the exciting coil of the second relay KA2. The second end of the first normally open contact loop KA21 of the second relay KA2 is connected to the negative output end of the third DC power supply output interface (16) through the normally open contact loop KT21 of the second time-delay relay KT2 and the exciting coil of the third relay KA3. The exciting coil of the third time-delay relay KT3 is connected in parallel with the exciting coil of the third relay KA3. The second end of the first normally open contact loop KA31 of the third relay KA3 is connected to the negative output end of the third DC power supply output interface (16) through the normally open contact loop KT31 of the third time-delay relay KT3 and the exciting coil of the fourth relay KA4. The exciting coil of the fourth time-delay relay KT4 is connected in parallel with the exciting coil of the fourth relay KA4; The first ends of the second normally open contact loop KA12 of the first relay KA1, the second normally open contact loop KA22 of the second relay KA2, the second normally open contact loop KA32 of the third relay KA3, and the normally open contact loop KA42 of the fourth relay KA4 are connected to the positive output end of the second DC power supply output interface (15). The second ends of the second normally open contact loop KA12 of the first relay KA1, the second normally open contact loop KA22 of the second relay KA2, the second normally open contact loop KA32 of the third relay KA3, and the normally open contact loop KA42 of the fourth relay KA4 are respectively connected in one-to-one correspondence with the test instruction input ends of the four indicator lamp loops (411).

6. The power distribution switch function verification device according to claim 5, wherein The closing and opening command unit (2) includes a first closing and opening command unit (21) for simulating the generation of a passive closing and opening command by the unit and a second closing and opening command unit (22) for simulating the generation of an active closing and opening command by the unit.

7. The power distribution switch function verification device according to claim 6, characterized in that, The first closing and opening command unit (21) includes a number of self-locking switch circuits (211) and non-self-locking switch circuits (212); Each of the self-locking switch circuits (211) includes a first interface (2111), a first self-locking switch button (2112), and a second interface (2113) provided on the console; the first interface (2111) is connected to the second interface (2113) via the first self-locking switch button (2112); Each of the non-self-locking switch circuits (212) includes a third interface (2121), a first switch button (2122), and a fourth interface (2123) provided on the console; the third interface (2121) is connected to the fourth interface (2123) via the first switch button (2122).

8. The power distribution switch function verification device according to claim 7, characterized in that The second closing and opening command unit (22) includes a closing and opening command common ground interface (221) provided on the console, as well as a number of second self-locking switch buttons (222), second switch buttons (223), and command output interfaces (224); The input ends of the second self-locking switch buttons (222) and the second switch buttons (223) are connected to the positive output end of the third DC power supply output interface (16), the output ends of the second self-locking switch buttons (222) and the second switch buttons (223) are respectively and correspondingly connected to the command output interface (224), and the closing and opening command common ground interface (221) is connected to the negative output end of the third DC power supply output interface (16).

9. The power distribution switch function verification device according to any one of claims 2 to 8, characterized in that The digital input verification unit (3) includes a digital input common ground interface (31) provided on the console of the housing, as well as a number of digital input indicator lights (32) and digital input interfaces (33); The input ends of the digital input indicator lights (32) are connected to the positive output end of the third DC power supply output interface (16), the output ends of the digital input indicator lights (32) are respectively and correspondingly connected to the digital input interfaces (33), and the digital input common ground interface (31) is connected to the negative output end of the third DC power supply output interface (16).

10. The power distribution switch function verification device according to claim 9, characterized in that, It further includes a short-circuiting unit, which includes a number of short-circuiting circuits (51); each of the short-circuiting circuits (51) includes two short-circuiting interfaces (511) provided on the console; one short-circuiting interface (511) is connected to the other short-circuiting interface (511).

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