CN221126943U - Redundant power supply device for sectionally closing electromagnetic valve of speed regulator - Google Patents
Redundant power supply device for sectionally closing electromagnetic valve of speed regulator Download PDFInfo
- Publication number
- CN221126943U CN221126943U CN202322675971.3U CN202322675971U CN221126943U CN 221126943 U CN221126943 U CN 221126943U CN 202322675971 U CN202322675971 U CN 202322675971U CN 221126943 U CN221126943 U CN 221126943U
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- power supply
- electric capacity
- intermediate relay
- solenoid valve
- electromagnetic valve
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- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000011218 segmentation Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 19
- 238000007599 discharging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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- Magnetically Actuated Valves (AREA)
Abstract
The utility model provides a redundant power supply unit of electromagnetic valve is closed to speed regulator segmentation, includes intermediate relay and electric capacity group, electric capacity group includes a plurality of parallelly connected farad electric capacities, and every farad electric capacity all establishes ties a current-limiting resistor, and electric capacity group both ends are put through with the power through first diode respectively, and the power is connected at intermediate relay coil both ends, and the solenoid valve both ends are put through with the power through the second diode, and electric capacity group both ends are connected with the solenoid valve both ends after intermediate relay contact. The utility model is used for solving the problem that when an extreme condition occurs, the power supply of the solenoid valve is closed in a sectionalized way due to the simultaneous interruption of multiple redundant power supplies or the interruption of the power supply of the solenoid valve caused by the fault of intermediate conversion equipment such as a switching power supply and the like.
Description
Technical Field
The utility model relates to a redundant power supply device for a segmented closing electromagnetic valve of a speed regulator.
Background
The sectional closing device is an important component device in a water turbine governor control system, the sectional closing electromagnetic valve is a core device of the sectional closing device, accurate action of the sectional closing electromagnetic valve must be ensured in the load shedding process of the water turbine generator set, and when the sectional closing electromagnetic valve cannot accurately act due to power supply failure, the situation that the machine set is lifted can be caused, so that the safety influence on the machine set device is extremely large.
The current method for improving the reliability of the power supply of the sectional closing electromagnetic valve is to use multiple paths of redundant power supplies, namely, two or more paths of power supplies with different sources are configured, and when a certain path of power supply has a problem, other power supplies can be replaced in time through a power supply coupling plate or a rectifying or power supply switching device, so that the power supply of the sectional closing electromagnetic valve is ensured to be uninterrupted. More AC 220V power supply and DC 220V power supply are used, after two power supplies pass through equipment such as a switch power supply, 220V voltage is converted into 24V voltage to be used as the power supply for closing the electromagnetic valve in a segmented way, and any 220V power supply is interrupted, so that the output of 24V power supply voltage is not influenced.
Defects and deficiencies of the prior art:
1. The multi-path redundant power supply only improves reliability compared with the single-path power supply, but when an extreme condition occurs, the multi-path redundant power supply is interrupted at the same time, and the power supply interruption of the solenoid valve can still be caused by the sectional closing of the solenoid valve.
2. When the fault of the intermediate conversion equipment (a switch power supply or a power supply switching device) occurs, the power supply of the solenoid valve is interrupted by the step-off 24V, and the power supply of the solenoid valve is interrupted by the step-off.
Disclosure of utility model
The utility model aims to solve the technical problem of providing a redundant power supply device for a segmented closing electromagnetic valve of a speed regulator, which is used for solving the problem that when an extreme condition occurs, a plurality of redundant power supplies are simultaneously interrupted or intermediate conversion equipment such as a switching power supply and the like are failed, so that the power supply of the segmented closing electromagnetic valve is interrupted by 24V, and the power supply of the segmented closing electromagnetic valve is interrupted.
In order to solve the problems, the technical scheme of the utility model is as follows:
The utility model provides a redundant power supply unit of electromagnetic valve is closed to speed regulator segmentation, includes intermediate relay and electric capacity group, electric capacity group includes a plurality of parallelly connected farad electric capacities, and every farad electric capacity all establishes ties a current-limiting resistor, and electric capacity group both ends are put through with the power through first diode respectively, and the power is connected at intermediate relay coil both ends, and the solenoid valve both ends are put through with the power through the second diode, and electric capacity group both ends are connected with the solenoid valve both ends after intermediate relay contact.
And the two ends of the intermediate relay coil are connected with a third diode in parallel.
The beneficial effects of the utility model are as follows:
1) When the power supply of the solenoid valve is interrupted by the sectionalized closing of the device, the power supply is temporarily replaced by the Faraday capacitor, so that the reliability of the power supply of the solenoid valve is improved by sectionalized closing.
2) The device has the advantages of simple device, small number, easy assembly and realization and small debugging and maintenance workload.
3) The Farad capacitor used by the device has the functions of charging and discharging, the performance is stable, the discharging time is long, and the rush repair time after the 24V power supply fails is increased.
4) The device has high integration level, and all devices are integrated in a standard small control cabinet, so that the device is convenient to install.
Drawings
The utility model is further described with reference to the accompanying drawings:
fig. 1 is a circuit diagram of the present utility model.
In the figure: the current limiting resistor 1, the Farad capacitor 2, the first diode 3, the intermediate relay contact 4, the second diode 5, the intermediate relay coil 6, the electromagnetic valve 7 and the third diode 8.
Detailed Description
As shown in fig. 1, the redundant power supply device for the electromagnetic valve with the segmented closing speed regulator comprises an intermediate relay and a capacitor group, wherein the capacitor group comprises 3 parallel Faraday capacitors 2, each Faraday capacitor 2 is connected in series with a current-limiting resistor 1, two ends of the capacitor group are respectively connected with a power supply through a first diode 3, two ends of an intermediate relay coil 6 are connected with the power supply, two ends of an electromagnetic valve 7 are connected with the power supply through a second diode 5, and two ends of the capacitor group are connected with two ends of the electromagnetic valve 7 after passing through an intermediate relay contact 4. The current limiting resistor 1 is used for limiting the current in the control loop when the Farad capacitor 2 discharges, and ensuring that the current of the control loop is in a normal range. The first diode 3 plays a role in reverse isolation and freewheeling, and ensures that the voltage of the Faraday capacitor 2 is not reversely transmitted to the 24V power supply.
The third diode 8 is connected in parallel with the two ends of the intermediate relay coil 6.
The utility model uses 24V power supply output by the speed regulator electrical control cabinet, the 24V power supply is output by the AC 220V power supply and the DC 220V power supply in the speed regulator electrical control cabinet after being converted by the switch power supply, any 220V power supply is interrupted, the 24V power supply is not interrupted, and the 24V power supply is used for controlling the sectionally closed electromagnetic valve 7.
The working principle of the utility model is as follows:
The intermediate relay KA is used for monitoring a 24V power supply, when the 24V power supply is normal, the intermediate relay coil 6 is excited, the normally open contact of the intermediate relay KA is closed, the normally closed contact of the intermediate relay KA is opened, and when the 24V power supply is interrupted, the intermediate relay coil 6 is demagnetized, and the normally open contact of the intermediate relay KA is opened, and the normally closed contact of the intermediate relay KA is closed.
When the 24V power supply is normal, the intermediate relay coil 6 is excited, the two pairs of normally-closed contacts a-b and c-d of the intermediate relay are disconnected, the connection loop of the Faraday capacitor 2 and the sectionally-closed electromagnetic valve 7 is disconnected, and the Faraday capacitor 2 cannot supply power to the control loop of the sectionally-closed electromagnetic valve 7. At the moment, the 24V power supply charges the Faraday capacitor 2 group and simultaneously supplies power to the control loop of the sectionalized closing electromagnetic valve 7.
When the 24V power supply is interrupted, the intermediate relay coil 6 is in demagnetizing state, two pairs of normally-closed contacts a-b and c-d of the intermediate relay are closed, the connection loop of the Faraday capacitor 2 and the sectionally-closed electromagnetic valve 7 is connected, and the Faraday capacitor 2 supplies power to the control loop of the sectionally-closed electromagnetic valve 7. The faraday capacitor 2 group is responsible for supplying power to the sectionally closed solenoid valve 7. Meanwhile, the normally open contact of the intermediate relay is disconnected, a signal of interruption of a 24V power supply is reported, and operation monitoring staff is informed to intervene in time.
When the 24V power supply is interrupted, the electric quantity of 3 groups of Faraday capacitors 2 configured by the device can be maintained for 6 hours.
When the 24V power supply is interrupted, the 3 groups of Faraday capacitors 2 arranged by the device can ensure that the solenoid valve 7 is closed for 5 times in a segmented mode.
Claims (2)
1. A redundant power supply device for a segmented closing electromagnetic valve of a speed regulator is characterized in that: including intermediate relay and electric capacity group, electric capacity group includes a plurality of parallelly connected farad electric capacities (2), and every farad electric capacity (2) all establishes ties a current-limiting resistor (1), and electric capacity group both ends are put through first diode (3) and power switch-on respectively, and the power is connected at intermediate relay coil (6) both ends, and solenoid valve (7) both ends are put through second diode (5) and power switch-on, and electric capacity group both ends are connected with solenoid valve (7) both ends after intermediate relay contact (4).
2. The redundant power supply device for a segmented shut-down solenoid valve of claim 1, wherein: and the two ends of the intermediate relay coil (6) are connected with a third diode (8) in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322675971.3U CN221126943U (en) | 2023-10-07 | 2023-10-07 | Redundant power supply device for sectionally closing electromagnetic valve of speed regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322675971.3U CN221126943U (en) | 2023-10-07 | 2023-10-07 | Redundant power supply device for sectionally closing electromagnetic valve of speed regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221126943U true CN221126943U (en) | 2024-06-11 |
Family
ID=91367882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322675971.3U Active CN221126943U (en) | 2023-10-07 | 2023-10-07 | Redundant power supply device for sectionally closing electromagnetic valve of speed regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221126943U (en) |
-
2023
- 2023-10-07 CN CN202322675971.3U patent/CN221126943U/en active Active
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