CN211343522U - Intelligent oil supply system in high-voltage switch hydraulic operating mechanism - Google Patents
Intelligent oil supply system in high-voltage switch hydraulic operating mechanism Download PDFInfo
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- CN211343522U CN211343522U CN201921822013.1U CN201921822013U CN211343522U CN 211343522 U CN211343522 U CN 211343522U CN 201921822013 U CN201921822013 U CN 201921822013U CN 211343522 U CN211343522 U CN 211343522U
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Abstract
The utility model belongs to the technical field of hydraulic control, and relates to an intelligent oil supply system in a high-voltage switch hydraulic operating mechanism, which is intelligently improved on the basis of a conventional energy storage and oil supply system of an energy accumulator; a flow sensor is connected in series in the oil supply system, a rotating speed sensor is connected on the motor, and a pressure sensor and a temperature sensor are arranged in an oil way; an intelligent control ware is according to the signal that the sensor detected, based on the control strategy that boyle's law was formulated, can judge whether gas leakage, the oil pump of energy storage ware are inefficacy very the very first time, remind maintainer to overhaul. The long-term operation reliability of the high-voltage switch hydraulic operating mechanism is ensured.
Description
Technical Field
The utility model belongs to the technical field of hydraulic control, a intelligent oil feeding system among high tension switchgear hydraulic pressure operating mechanism is related to.
Background
The hydraulic operating mechanism of the high-voltage electrical switch is a hydraulic device which runs intermittently, the action time is very short, and the intermittent time is very long, so that an oil source system of the hydraulic operating mechanism needs to use an oil supply system of high-pressure pump oil supplement and energy storage of an energy accumulator, as shown in figure 1.
The output oil of the high-pressure pump 2 driven by the motor 1 enters the energy accumulator 5 through the one-way valve 3, so that the oil pressure of the energy accumulator is continuously increased, when the pressure of the energy accumulator reaches the upper limit, the pressure switch 7 cuts off the motor 1, and the oil pump stops outputting the oil; until the high-pressure switch acts, the stored energy of the energy accumulator 5 is consumed, and after the oil pressure falls to the lower pressure limit, the pressure relay restarts the oil pump to replenish the energy accumulator 5 with oil. The system has low energy consumption and high efficiency, well meets the technical requirements of the hydraulic operating mechanism of the high-voltage switch, and has the unique defect that once the energy accumulator leaks air and the inflation pressure is reduced, the energy stored by the energy accumulator is greatly reduced, so that the energy of a brake-separating oil cylinder of the high-voltage switch is insufficient, the brake-separating speed is too slow or the brake-separating is not in place, and serious accidents are caused. The fault of insufficient energy of the energy accumulator cannot be simply found from the pressure of the pressure gauge 4 due to the oil supplement of the high-pressure pump, and can be displayed only after the on-off accident occurs.
Disclosure of Invention
The utility model provides an above-mentioned problem, provide an intelligent oil feeding system among high tension switchgear hydraulic pressure operating mechanism, this oil feeding system can find the problem that energy storage ware gas leakage and high-pressure pump became invalid the very first time.
According to the technical scheme of the utility model: an intelligent oil supply system in a high-voltage switch hydraulic operating mechanism comprises an oil supply oil way, wherein the oil outlet end of the oil supply oil way is connected with an oil outlet oil way, and a one-way valve is arranged on the oil supply oil way; the oil inlet end of the oil supply oil way is connected with a high-pressure pump, and the high-pressure pump is connected with an oil cylinder through a pipeline; the high-pressure pump is driven by a driving motor to operate, and an energy accumulator is arranged on an oil outlet oil way; the method is characterized in that: a flow sensor, a motor rotating speed sensor, a temperature sensor and an intelligent controller are connected in series in the oil supply system; the first terminal of the intelligent controller inputs an oil pressure signal of a pressure sensor, and the pressure sensor is connected in an oil outlet oil way;
a second terminal of the intelligent controller inputs an oil temperature signal of a temperature sensor, and the temperature sensor is connected in the oil outlet oil way;
a third wiring end of the intelligent controller inputs a motor rotating speed signal of a rotating speed sensor, and the rotating speed sensor is connected to the driving motor;
the fourth terminal of the intelligent controller inputs the flow signal of the flow sensor, and the flow sensor is connected in the oil supply oil way.
As a further improvement of the utility model, a rotation speed sensor is arranged on the driving motor.
As a further improvement of the utility model, a temperature sensor is arranged in the oil outlet oil way.
As a further improvement of the utility model, a flow sensor is arranged in the oil supply circuit.
As a further improvement, the intelligent controller is a PLC or a single chip microcomputer based on the Boyle's law control strategy.
The technical effects of the utility model reside in that: the utility model discloses the product can not follow the manometer to observe out the not enough problem of energy storage ware energy to current oil feeding system existence and carry out the pertinence improvement, and the product after the improvement can realize no matter energy storage ware leaks gas or the high-pressure pump inefficacy can both discover the very first time, reminds maintainer to overhaul, ensures high-pressure switch hydraulic pressure operating mechanism's long-term operation reliability.
Drawings
Fig. 1 is a schematic structural view of a conventional oil supply system.
Fig. 2 is the structure diagram of the intelligent oil supply system of the present invention.
Fig. 3 is a schematic block diagram of the controller control strategy of the intelligent oil supply system of the present invention.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an oil supply system of a common accumulator, which comprises a driving motor 1, a high-pressure pump 2, a one-way valve 3, a pressure gauge 4, an accumulator 5, a pressure switch 7 and the like.
Fig. 2 is the improved oil supply system of the intelligent energy accumulator of the present invention, which comprises a driving motor 1, a high-pressure pump 2, a check valve 3, a pressure gauge 4, an energy accumulator 5, a temperature sensor 6, a pressure sensor 7, a flow sensor 8 intelligent controller 9, a rotation speed sensor 10, etc., wherein the inlet of the high-pressure pump 2 absorbs oil from an oil tank, the outlet is connected with an oil outlet path, and the high-pressure pump is driven by the driving motor 1 to operate; the oil outlet path is provided with a one-way valve 3, the high-pressure pump stores pressure oil in an energy accumulator 5 through the one-way valve 3, the pressure oil is used by a high-pressure switch opening and closing oil cylinder, and the oil outlet pressure of the energy accumulator 5 can be read by a pressure gauge 4 in the path; the utility model discloses an intelligence oil feeding system, its characterized in that: a flow sensor 8 is connected in series in an oil outlet oil path of the oil pump 2, a rotating speed sensor 10 is connected on the driving motor 1, a pressure sensor 7 and a temperature sensor 6 are arranged in the oil path, and signals of the sensors are input into an intelligent controller 9; wherein the first terminal of the intelligent controller 9 inputs the oil pressure signal of the pressure sensor 7, and the pressure sensor 7 is connected in the oil outlet oil path 12.
The second terminal of the intelligent controller 9 inputs the oil temperature signal of the temperature sensor 6, and the temperature sensor 6 is connected in the oil outlet oil path 12.
The third terminal of the intelligent controller 9 inputs the motor rotating speed signal of the rotating speed sensor 10, and the rotating speed sensor is connected to the driving motor 1.
The fourth terminal of the intelligent controller inputs the flow signal of the flow sensor 8. The flow sensor 8 is connected to the oil supply passage 11.
The utility model discloses intelligent control ware 9 in the product can constitute by PLC or the singlechip based on the operation of boyle's law control strategy.
Revolution speed sensor 10, flow sensor 8, temperature sensor 6, pressure sensor 7, for the ripe product among the prior art, the utility model discloses the product does not carry out institutional advancement to above-mentioned product, and the ripe product among the prior art can be chooseed for use to intelligent control ware 9's hardware, and intelligent control ware's control strategy is based on the boyle's law.
As shown in fig. 3, the control principle of the present invention is based on boyle's law; from detecting accumulator oil pressure by PminIs charged to PmaxThe input oil quantity Q is used for judging the inflation volume V0And if the air leakage is reduced, an alarm is given for the air leakage of the energy accumulator.
According to Boyle's law
The charging process of the energy store 5 can be regarded as an adiabatic process, in which case n is 1.4, where V is0Volume of compressed gas, P, charged into the accumulator 50Charging pressure, P, for charging the accumulator 5minAnd VminGas volume at minimum working pressure and minimum working pressure, PmaxAnd VmaxThe gas volume at the highest working pressure and the highest working pressure, respectively. And Vmin-VmaxThe oil quantity Q is supplemented to the energy accumulator 5 by the high-pressure pump 2, and the charging quantity V can be easily calculated according to the Boyle's law after Q is measured0Once V is found0A decrease indicates a leak in the accumulator 5.
When the high-pressure pump 2 supplies oil to the accumulator 5, the controller 9 detects the pressure of the accumulator 5 through the flow sensor 8, and the pressure is Pmin～PmaxThe amount Q of oil in the accumulator 5 is supplemented. According to Boyle's law
The inflation quantity V at this time is calculated according to the above1If V is0Is the air charging amount calculated by the first oil charging, then
Is the leakage rate of the accumulator 5, if Pmax、 PminNot changing, then
When the air leakage rate is greater than a certain limit value, the controller 9 gives an alarm to the main control room and notifies maintenance.
Fig. 3 is a schematic block diagram of a control strategy of the controller 9, which may be implemented by a single chip or PLC or other electronic circuit.
In order to prevent the flow sensor 8 from becoming a new safety hazard, the rotation speed sensor 10 is connected to the motor, and when an error between the flow rate calculated by the rotation speed sensor 10 and the flow rate detected by the flow sensor 8 is excessively large, it can be determined that the high-pressure pump 2 is in failure or the flow sensor 8 is in failure.
V is affected by changes in ambient temperature0So that the real-time temperature t detected by the temperature sensor 6 is used as a basis for calculating the leak rate1To V0And (3) temperature correction is carried out:
wherein t is1Is the real-time ambient temperature, t0Is the ambient temperature at the time of initial inflation, and T is absolute zero-273.15 ℃.
Claims (5)
1. An intelligent oil supply system in a high-voltage switch hydraulic operating mechanism comprises an oil supply oil way (11), wherein the oil outlet end of the oil supply oil way (11) is connected with an oil outlet oil way (12), and a one-way valve (3) is arranged on the oil supply oil way (11); the oil inlet end of the oil supply oil way (11) is connected with the high-pressure pump (2), and the high-pressure pump (2) is connected with the oil cylinder through a pipeline; the high-pressure pump (2) is driven by the driving motor (1) to operate, and the oil outlet oil way (12) is provided with an energy accumulator (5); the method is characterized in that: a flow sensor (8), a motor rotating speed sensor (10), a temperature sensor (6) and an intelligent controller (9) are connected in series in the oil supply system; wherein, the first terminal of the intelligent controller (9) inputs the oil pressure signal of the pressure sensor (7), and the pressure sensor (7) is connected in the oil outlet oil circuit (12);
a second terminal of the intelligent controller (9) inputs an oil temperature signal of the temperature sensor (6), and the temperature sensor (6) is connected in the oil outlet oil way (12);
a third terminal of the intelligent controller (9) inputs a motor rotating speed signal of a rotating speed sensor (10), and the rotating speed sensor (10) is connected to the driving motor (1);
the fourth terminal of the intelligent controller inputs a flow signal of the flow sensor (8), and the flow sensor (8) is connected in the oil supply oil way (11).
2. The intelligent oil supply system in the high-voltage switch hydraulic operating mechanism according to claim 1, wherein: a rotation speed sensor (10) is arranged on the driving motor (1).
3. The intelligent oil supply system in the high-voltage switch hydraulic operating mechanism according to claim 1, wherein: a temperature sensor (6) is arranged in the oil outlet passage (12).
4. The intelligent oil supply system in the high-voltage switch hydraulic operating mechanism according to claim 1, wherein: a flow sensor (8) is provided in the oil supply passage (11).
5. The intelligent oil supply system in the high-voltage switch hydraulic operating mechanism according to claim 1, wherein: the intelligent controller (9) is a PLC or a single chip microcomputer which controls the operation of a strategy based on Boyle's law.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921822013.1U CN211343522U (en) | 2019-10-28 | 2019-10-28 | Intelligent oil supply system in high-voltage switch hydraulic operating mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921822013.1U CN211343522U (en) | 2019-10-28 | 2019-10-28 | Intelligent oil supply system in high-voltage switch hydraulic operating mechanism |
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| CN211343522U true CN211343522U (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184334A (en) * | 2021-12-10 | 2022-03-15 | 国家电网有限公司 | Automatic pressurizing system with accurate pressure control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184334A (en) * | 2021-12-10 | 2022-03-15 | 国家电网有限公司 | Automatic pressurizing system with accurate pressure control |
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