Electric head off-line verification circuit and device
By designing an offline calibration circuit for the electric head, the problem that the calibration of the electric head in a nuclear power plant requires two people to work together is solved, the offline calibration of the electric head is realized, and the calibration efficiency and safety are improved.
Patent Information
- Application Number
- CN202422641956.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Calibration of electric heads in nuclear power plants requires the collaborative operation of two people, which wastes human resources and carries the risk of human error. Existing technology makes offline calibration difficult to achieve.
An electric head offline verification circuit is designed, which includes a power supply unit, a power supply switch unit, an electric head control unit, an electric head drive unit and a voltage detection unit. The power supply switch unit and the electric head control unit are operated on the local side of the electric head to realize the offline verification of the electric head.
It realizes offline calibration of the electric head, simplifies operation, improves calibration efficiency, reduces the risk of human error, and saves overhaul time.
Smart Images
Figure CN223436058U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nuclear power plant equipment overhauling technical field especially relates to a kind of electric head offline verification circuit and device. BACKGROUND
[0002] The electric head in nuclear power plant usually has a certain distance between the distribution panel that supplies power to it, and the traditional verification method needs a staff to control the action of the electric head at the distribution panel side, another staff observes the action of the electric head at the electric head site, and the two people need to communicate by telephone to confirm whether the electric head is normal action, which wastes human resources. If a single person verifies, the staff needs to frequently return between the electric head site and the distribution panel, which is very inconvenient, resulting in heavy verification workload and high risk of human error, so there is an urgent need for a tool that can verify the electric head offline in nuclear power plants. SUMMARY
[0003] The technical problem to be solved by the utility model is to provide an electric head offline verification circuit and device.
[0004] The technical solution adopted by the utility model to solve its technical problem is: a kind of electric head offline verification circuit is constructed, including:
[0005] A power supply unit is used to output a DC power supply.
[0006] A power supply switch unit is connected to the power supply unit.
[0007] An electric head control unit is connected to the power supply unit and is used to output an open command or a close command.
[0008] An electric head drive unit has its power input end connected to an AC power supply through the power supply switch unit, its power output end is used to connect the measured electric head, and its command input end is connected to the electric head control unit. When receiving the open command, the electric head drive unit controls the measured electric head to open, and when receiving the close command, the electric head drive unit controls the measured electric head to close.
[0009] A voltage detection unit is connected to the power output end of the electric head drive unit and is used to detect the voltage parameter input to the measured electric head.
[0010] Preferably, the power supply switch unit includes:
[0011] A disconnecting button has its first end connected to the first end of the power supply unit.
[0012] A closing button has its first end connected to the second end of the disconnecting button.
[0013] A first relay, whose magnet coil is connected between the second end of the closing button and the second end of the power supply unit, and whose normally open contact loop is connected between the AC power supply and the power input end of the motor head driving unit.
[0014] Preferably, the opening button is a normally closed button, and the closing button is a normally open button.
[0015] Preferably, the first relay further comprises a normally open contact loop in parallel with the closing button.
[0016] Preferably, the motor head control unit comprises:
[0017] a switch controller, whose fixed contact is connected to the first end of the power supply unit;
[0018] a second relay, whose magnet coil is connected between the first movable contact of the switch controller and the second end of the power supply unit, and whose normally open contact loop is connected between the first command input end of the motor head driving unit and the first end of the power supply unit;
[0019] a third relay, whose magnet coil is connected between the second movable contact of the switch controller and the second end of the power supply unit, and whose normally open contact loop is connected between the second command input end of the motor head driving unit and the first end of the power supply unit.
[0020] Preferably, the motor head off-line verification circuit further comprises:
[0021] a limit control unit, connected to the motor head control unit, for controlling the measured motor head to be shut down when the measured motor head is opened to a preset open limit or closed to a preset close limit.
[0022] Preferably, the limit control unit comprises:
[0023] an open limit switch, comprising a first normally closed loop connected in series between the first end of the power supply unit and the normally open contact loop of the second relay, and a first limit control mechanism cooperating with the measured motor head to control the first normally closed loop to be disconnected when the measured motor head is opened to the open limit;
[0024] a close limit switch, comprising a second normally closed loop connected in series between the first end of the power supply unit and the normally open contact loop of the third relay, and a second limit control mechanism cooperating with the measured motor head to control the second normally closed loop to be disconnected when the measured motor head is closed to the close limit.
[0025] Preferably, the open limit switch further comprises a first normally open loop, and the close limit switch further comprises a second normally open loop.
[0026] The limit control unit further comprises:
[0027] An open limit indicator lamp, one end of which is connected to the first end of the power supply unit through the first normally open circuit, and the other end of which is connected to the second end of the power supply unit;
[0028] A close limit indicator unit, one end of which is connected to the first end of the power supply unit through the second normally open circuit, and the other end of which is connected to the second end of the power supply unit.
[0029] Preferably, the electric head offline verification circuit further comprises:
[0030] A circuit breaker connected between the AC power supply and the power supply switch unit;
[0031] An AC power supply indicator lamp connected to the circuit breaker;
[0032] A DC power supply indicator lamp connected in parallel with the power supply unit.
[0033] The utility model further constructs a kind of electric head offline verification device, including the electric head offline verification circuit described above.
[0034] The utility model has the following beneficial effects: using the utility model can be in situ side of electric head and the realization connection of electric head, by operating power supply switch unit, electric head control unit to control the opening or closing of measured electric head, then directly observing the actual action of measured electric head or measured electric head driven equipment in situ side field, to determine whether the measured electric head is correctly executed action, realizes the offline verification of electric head, not only simple operation, but also improve the verification efficiency of electric head, reduce the risk of human error and save overhaul period play active role. BRIEF DESCRIPTION OF DRAWINGS
[0035] The utility model will be further described below in conjunction with the drawings and examples, and the drawings are as follows:
[0036] Figure 1 It is the circuit schematic diagram of electric head offline verification circuit in some embodiments of the utility model. DETAILED DESCRIPTION
[0037] In order to have more clear understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be described in detail by comparing the drawings.
[0038] In the following description, it needs to be understood that the directions or position relations indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or position relations shown in the drawings, constructed and operated in a particular direction, only for the convenience of describing the technical scheme, and not indicating that the indicated device or element must have a particular direction, therefore, it cannot be understood as a limitation to the practical new type.
[0039] As shown in Figure 1 The utility model provides a kind of electric head offline verification circuit, including power supply unit 1, power supply switch unit 2, electric head control unit 3, electric head drive unit 4 and voltage detection unit 5.
[0040] Power supply unit 1 is used to output DC power supply.
[0041] Power supply switch unit 2 is connected with power supply unit 1, and power supply switch unit 2 is used to control whether AC power supply supplies power to electric head drive unit 4 according to the operation of staff.
[0042] Electric head control unit 3 is connected with power supply unit 1, and electric head control unit 3 is used to output open instruction or close instruction according to the operation of staff. Wherein, open instruction can control measured electric head 100 to carry out opening action, i.e. control corresponding valve to open;Close instruction can control measured electric head 100 to carry out closing action, i.e. control corresponding valve to close.
[0043] The power input end of electric head drive unit 4 is connected to AC power supply through power supply switch unit 2, and the power output end of electric head drive unit 4 is used to connect measured electric head 100, the instruction input end of electric head drive unit 4 is connected with electric head control unit 3, and electric head drive unit 4 controls measured electric head 100 to open when receiving open instruction and controls measured electric head 100 to close when receiving close instruction.
[0044] Voltage detection unit 5 is connected with the power output end of electric head drive unit 4, and voltage detection unit 5 is used to detect the size of voltage parameter input to measured electric head 100.
[0045] Please see Figure 1The working principle of the embodiment is as follows: first, the staff operates the power supply switch unit 2 to connect the electric head driving unit 4 with the alternating current power supply; when the staff needs to control the measured electric head 100 to open, the electric head control unit 3 is operated to output an open instruction, so that the electric head driving unit 4 controls the measured electric head 100 to open; when the staff needs to control the measured electric head 100 to close, the electric head control unit 3 is operated to output a close instruction, so that the electric head driving unit 4 controls the measured electric head 100 to close. In addition, the voltage detection unit 5 also detects the alternating current voltage input to the measured electric head 100 in real time and displays the alternating current voltage, so that the staff can know the real-time power supply condition of the measured electric head 100.
[0046] Understandably, the staff can use the utility model to realize the connection of the electric head on-site side with the electric head, control the measured electric head to open or close through the operation of the power supply switch unit and the electric head control unit, and then directly observe the actual action of the measured electric head or the equipment (such as a valve) driven by the measured electric head on the on-site side, so as to determine whether the measured electric head correctly performs the action, realize the offline verification of the electric head, and not only realize simple operation, but also improve the verification efficiency of the electric head, which plays a positive role in reducing the risk of human error and saving the overhaul period.
[0047] In some embodiments, the power supply unit 1 can be an existing direct current power supply capable of outputting 24V direct current voltage.
[0048] In some embodiments, as shown in Figure 1 The first end of the closing button 22 is connected to the second end of the opening button 21, the magnetizing coil of the first relay 23 is connected between the second end of the closing button 22 and the second end of the power supply unit 1, and the normally open contact loop of the first relay 23 is connected between the alternating current power supply and the power input end of the electric head driving unit 4. Understandably, when the staff operates the opening button 21 and the closing button 22 to close at the same time, the magnetizing coil of the first relay 23 will be electrified to work, so that the normally open contact loop of the first relay 23 is attracted, and then the electric head driving unit 4 is connected with the alternating current power supply, which can supply power to the measured electric head 100.
[0049] In some embodiments, the opening button 21 can be a normally closed button; the closing button 22 can be a normally open button; and the first relay 23 can be a three-phase alternating current relay, that is, the normally open contact loop of the first relay 23 includes three normally open contact loops, which controls the connection between the three-phase alternating current power supply and the power input end of the electric head driving unit 4.
[0050] In some embodiments, as shown inFigure 1 As shown, the first relay 23 may further include a normally open contact circuit connected in parallel with the closing button 22. It should be noted that when the normally open contact circuit of the first relay 23 is in effect, after the opening button 21 and the closing button 22 are both closed, the first relay 23 is excited, which will close the normally open contact circuit of the first relay 23. Even if the staff no longer operates the closing button 22, the excitation coil of the first relay 23 can be kept powered by the bypass action of the normally open contact circuit of the first relay 23, so that the electric head drive unit 4 can always draw power from the AC power supply. Furthermore, the staff only needs to press the opening button 21 to demagnetize the excitation coil of the first relay 23, thereby causing the tested electric head 100 to lose power and stop operating.
[0051] In some embodiments, as Figure 1 As shown, the electric head control unit 3 may include a switch controller 31, a second relay 32 and a third relay 33. The fixed contact of the switch controller 31 is connected to the first end of the power supply unit 1 or is connected to the first end of the power supply unit 1 via the trip button 21 which is a normally closed button. The excitation coil of the second relay 32 is connected between the first moving contact of the switch controller 31 and the second end of the power supply unit 1, and the normally open contact circuit of the second relay 32 is connected between the first instruction input end of the electric head drive unit 4 and the first end of the power supply unit 1. The excitation coil of the third relay 33 is connected between the second moving contact of the switch controller 31 and the second end of the power supply unit 1, and the normally open contact circuit of the third relay 33 is connected between the second instruction input end of the electric head drive unit 4 and the first end of the power supply unit 1. The switch controller 31 may be a rotary switch. A staff member may operate the switch controller 31 to connect the fixed contact of the switch controller 31 to its first movable contact or its second movable contact, thereby controlling the excitation of the second relay 32 or the third relay 33. When the second relay 32 is energized, the normally open contact circuit of the second relay 32 is closed, causing the first instruction input terminal of the electric head drive unit 4 to be set to a high level, which is equivalent to inputting an on instruction to the electric head drive unit 4. When the third relay 33 is energized, the normally open contact circuit of the third relay 33 is closed, causing the second instruction input terminal of the electric head drive unit 4 to be set to a high level, which is equivalent to inputting an off instruction to the electric head drive unit 4. It should be noted that the instruction input terminal of the electric head drive unit 4 includes the first instruction input terminal A1+ and the second instruction input terminal A3+ of the electric head drive unit 4.
[0052] In some embodiments, as Figure 1As shown, the motor head offline calibration circuit further comprises a limit control unit 6. The limit control unit 6 is connected with the motor head control unit 3. The limit control unit 6 is used to control the motor head 100 to stop operating when the motor head 100 is opened to a preset open limit or closed to a preset close limit, thereby preventing the motor head 100 from being damaged due to over opening or over closing.
[0053] In some embodiments, as shown in Figure 1 The limit control unit 6 can comprise an open limit switch 61 and a close limit switch 62. The open limit switch 61 comprises a first normally closed loop connected in series between the first end of the power supply unit 1 and the normally open contact loop of the second relay 32, and a first limit control mechanism cooperating with the motor head 100 to control the first normally closed loop to be disconnected when the motor head 100 is opened to the open limit. The close limit switch 62 comprises a second normally closed loop connected in series between the first end of the power supply unit 1 and the normally open contact loop of the third relay 33, and a second limit control mechanism cooperating with the motor head 100 to control the second normally closed loop to be disconnected when the motor head 100 is closed to the close limit.
[0054] In some embodiments, as shown in Figure 1 The open limit switch 61 can further comprise a first normally open loop, and the close limit switch 62 can further comprise a second normally open loop. Accordingly, the limit control unit 6 can further comprise an open limit indicator 63 and a close limit indicator 64. One end of the open limit indicator 63 is connected to the first end of the power supply unit 1 through the first normally open loop, and the other end of the open limit indicator 63 is connected to the second end of the power supply unit 1. The first normally open loop of the limit control unit is closed when the motor head 100 is opened to the open limit, thereby lighting the open limit indicator 63 to prompt the staff that the motor head 100 has been opened to the open limit. One end of the close limit indicator 64 is connected to the first end of the power supply unit 1 through the second normally open loop, and the other end of the close limit indicator 64 is connected to the second end of the power supply unit 1. The second normally open loop of the close limit indicator 64 is closed when the motor head 100 is closed to the close limit, thereby lighting the close limit indicator 64 to prompt the staff that the motor head 100 has been closed to the close limit.
[0055] In some embodiments, as shown in Figure 1As shown, the electric head offline verification circuit may also include a circuit breaker 7, an AC power indicator light 8, and a DC power indicator light 9. The circuit breaker 7 is connected between the AC power supply and the power supply switch unit 2 to control the connection between the AC power supply and the normally open contact circuit of the first relay 23 in the power supply switch unit 2 according to the operation of the staff. The AC power indicator light 8 is connected between two of the input contacts of the circuit breaker 7 to indicate whether the AC power supply is normally connected. The DC power indicator light 9 is connected in parallel with the first end and the second end of the power supply unit 1 to indicate whether the power supply unit 1 is outputting the DC voltage normally.
[0056] In some embodiments, the electric head driving unit 4 can be an existing forward and reverse transistor relay.
[0057] In some embodiments, the voltage detection unit 5 may be a voltmeter.
[0058] It should be noted that, in the present invention, the AC power supply may be a three-phase AC voltage.
[0059] The utility model also provides an electric head offline calibration device, which includes the electric head offline calibration circuit provided in the utility model embodiment.
[0060] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.
Claims
1. An electric head offline calibration circuit, characterized in that: include: A power supply unit (1), configured to output a DC power supply; A power supply switch unit (2) connected to the power supply unit (1); An electric head control unit (3), connected to the power supply unit (1), and configured to output an on command or an off command; An electric head drive unit (4), whose power input end is connected to an AC power supply via the power supply switch unit (2), whose power output end is used to connect to the electric head under test, and whose command input end is connected to the electric head control unit (3), wherein the electric head drive unit (4) controls the electric head under test to open when receiving an open command, and controls the electric head under test to close when receiving an off command; A voltage detection unit (5) is connected to the power output terminal of the electric head driving unit (4) and is used to detect voltage parameters input to the electric head under test.
2. The electric head offline calibration circuit according to claim 1, characterized in that: The power supply switch unit (2) comprises: A trip button (21), a first end of which is connected to a first end of the power supply unit (1); A closing button (22), a first end of which is connected to the second end of the opening button (21); A first relay (23) has an excitation coil connected between the second end of the closing button (22) and the second end of the power supply unit (1), and a normally open contact circuit connected between the AC power supply and the power input end of the electric head drive unit (4).
3. The electric head offline verification circuit according to claim 2, characterized in that: The opening button (21) is a normally closed button, and the closing button (22) is a normally open button.
4. The electric head offline calibration circuit according to claim 3, characterized in that: The first relay (23) also includes a normally open contact circuit connected in parallel with the closing button (22).
5. The electric head offline verification circuit according to claim 1, characterized in that: The electric head control unit (3) comprises: A switch controller (31), a fixed contact of which is connected to a first end of the power supply unit (1); a second relay (32), whose excitation coil is connected between the first movable contact of the switch controller (31) and the second end of the power supply unit (1), and whose normally open contact circuit is connected between the first command input end of the electric head drive unit (4) and the first end of the power supply unit (1); A third relay (33) has an excitation coil connected between the second movable contact of the switch controller (31) and the second end of the power supply unit (1), and a normally open contact circuit connected between the second command input end of the electric head drive unit (4) and the first end of the power supply unit (1).
6. The electric head offline verification circuit according to claim 5, characterized in that: Also includes: A limit control unit (6) is connected to the electric head control unit (3) and is used to control the electric head to be tested to stop operating when the electric head to be tested is opened to a preset open limit or closed to a preset close limit.
7. The electric head offline verification circuit according to claim 6, characterized in that: The limit control unit (6) comprises: An open limit switch (61) comprising a first normally closed circuit connected in series between the first end of the power supply unit (1) and the normally open contact circuit of the second relay (32), and a first limit control mechanism cooperating with the tested electric head to control the disconnection of the first normally closed circuit when the tested electric head is opened to the open limit; A closing limit switch (62) comprises a second normally closed circuit connected in series between the first end of the power supply unit (1) and the normally open contact circuit of the third relay (33), and a second limit control mechanism cooperating with the tested electric head to control the disconnection of the second normally closed circuit when the tested electric head is closed to the closing limit.
8. The electric head offline verification circuit according to claim 7, characterized in that: The open limit switch (61) further includes a first normally open circuit, and the closed limit switch (62) further includes a second normally open circuit; The limit control unit (6) further includes: An open limit indicator light (63), one end of which is connected to the first end of the power supply unit (1) via the first normally open circuit, and the other end of which is connected to the second end of the power supply unit (1); A closing limit indicating unit (64) has one end connected to the first end of the power supply unit (1) via the second normally open circuit, and the other end connected to the second end of the power supply unit (1).
9. The electric head offline verification circuit according to any one of claims 1 to 8, characterized in that: Also includes: A circuit breaker (7) connected between the AC power supply and the power switch unit (2); AC power indicator light (8), connected to the circuit breaker (7); A DC power indicator light (9) is connected in parallel with the power supply unit (1).
10. An off-line calibration device for an electric head, characterized in that: The invention comprises the electric head offline verification circuit as described in any one of claims 1 to 9.