CN112713052B - Device for improving pressure-resistant level and current capacity of pressure-controlled material - Google Patents
Device for improving pressure-resistant level and current capacity of pressure-controlled material Download PDFInfo
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- CN112713052B CN112713052B CN202011565465.3A CN202011565465A CN112713052B CN 112713052 B CN112713052 B CN 112713052B CN 202011565465 A CN202011565465 A CN 202011565465A CN 112713052 B CN112713052 B CN 112713052B
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- 239000000463 material Substances 0.000 title claims abstract description 84
- 229910052751 metal Inorganic materials 0.000 claims abstract description 55
- 239000002184 metal Substances 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 229910018503 SF6 Inorganic materials 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 5
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 150000002736 metal compounds Chemical class 0.000 claims description 4
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 claims description 3
- 229910033181 TiB2 Inorganic materials 0.000 claims description 3
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 3
- 238000012546 transfer Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- YEPGIYSLLAGBSS-UHFFFAOYSA-M chloro-[3-[(4-iodophenyl)carbamoylamino]-2-methoxypropyl]mercury Chemical group Cl[Hg]CC(OC)CNC(=O)NC1=CC=C(I)C=C1 YEPGIYSLLAGBSS-UHFFFAOYSA-M 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/42—Driving mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/22—Selection of fluids for arc-extinguishing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/285—Power arrangements internal to the switch for operating the driving mechanism using electro-dynamic repulsion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
Landscapes
- Gas-Insulated Switchgears (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention discloses a device for improving the voltage-resistant level and the through-current capacity of a voltage-controlled material, which comprises a voltage-controlled material unit, a compression spring, a connecting rod, a repulsion mechanism and a permanent magnet mechanism, wherein the voltage-controlled material unit comprises a first metal electrode, a second metal electrode, a voltage-controlled material and an insulating cavity, an insulating medium is filled in the insulating cavity, the voltage-controlled material is arranged in the insulating cavity, the first metal electrode and the second metal electrode are respectively used as end covers at two ends of the insulating cavity, the first metal electrode, the voltage-controlled material and the second metal electrode are sequentially connected, system current flows in from the first metal electrode and flows out from the second metal electrode, the second metal electrode is connected with one end of the compression spring, the other end of the compression spring is connected with the connecting rod, and the connecting rod is connected with the repulsion mechanism and the permanent magnet mechanism. The voltage-controlled material is placed in the insulating medium, so that the voltage-controlled material has improved voltage and short-time heavy current resistance, and can be used for realizing the processes of current rapid transfer and current limitation.
Description
Technical Field
The invention belongs to the technical field of high-voltage power equipment, and particularly relates to a device for improving the voltage-resistant level and the current capacity of a voltage-controlled material.
Background
At present, current transfer is often used as a reliable and efficient operation scheme to limit or disconnect current. When current transfer is required, the resistance value of the voltage-controlled material is controlled to be rapidly increased, so that the voltage at two ends of the material is rapidly increased, the current is driven to be rapidly transferred, and meanwhile, the material is required to bear large short-circuit current in the transfer process so as not to be damaged. However, the current voltage-controlled material has the problem of weak voltage tolerance, so that the transfer and current limiting cannot be effectively and reliably completed.
Disclosure of Invention
Aiming at the problems, the invention researches and designs a device for improving the voltage withstanding level and the current capacity of the voltage-controlled material to overcome the defects that the voltage withstanding of the voltage-controlled material is not strong and the current transfer and the current limiting cannot be rapidly completed in the traditional device. The technical means adopted by the invention are as follows:
a device for improving the pressure resistance level and the current capacity of a pressure-controlled material comprises a pressure-controlled material unit, a compression spring, a connecting rod, a repulsion mechanism for opening a brake and a permanent magnet mechanism for closing the brake, the voltage control material unit comprises a first metal electrode, a second metal electrode, a voltage control material and an insulation chamber, the insulating cavity is filled with insulating medium, the voltage-controlled material is arranged in the insulating cavity, the first metal electrode and the second metal electrode are respectively used as end covers at two ends of the insulating cavity, the first metal electrode, the voltage-controlled material and the second metal electrode are connected in sequence, system current flows in from the first metal electrode and flows out from the second metal electrode, the second metal electrode is connected with one end of the compression spring, the other end of the compression spring is connected with the connecting rod, and the connecting rod is connected with the repulsion mechanism and the permanent magnet mechanism.
Preferably, the insulating chamber is a vacuum environment.
Preferably, the insulating medium is an insulating gas.
Preferably, the insulating medium is sulfur hexafluoride, carbon dioxide or nitrogen.
Preferably, a corrugated pipe is arranged between the second metal electrode and the insulating chamber, one end of the corrugated pipe is connected with the insulating chamber in a sealing manner, and the other end of the corrugated pipe is connected with the second metal electrode in a sealing manner.
Preferably, an air inlet and an air outlet are arranged on the insulating chamber, and a pressure gauge for detecting the internal pressure is arranged on the insulating chamber.
Preferably, the pressure-controlling material is a metal compound whose resistance value changes with a change in pressure.
Preferably, the voltage control material is titanium diboride or titanium carbide.
Compared with the prior art, the device for improving the pressure resistance level and the current capacity of the pressure-controlled material has the beneficial effects that:
1. the voltage-controlled material is placed in the insulating medium (comprising vacuum or insulating gases such as sulfur hexafluoride, carbon dioxide and nitrogen), so that the medium strength of the gap of the voltage-controlled material is increased, and the voltage and short-time large current resistance of the voltage-controlled material is improved.
2. The device can be used for current transfer, when current transfer needs to occur, the repulsion mechanism is driven to perform opening operation to generate electric repulsion, the pressure borne by the voltage-controlled material is reduced, the resistance value of the voltage-controlled material is increased, and the repulsion mechanism is matched with the arc extinguish chamber to drive current to be transferred to a branch to be transferred, so that the current fast transfer process is realized, and in addition, a larger short-circuit current can be born in the transfer process to complete the current limiting process, so that the task of cutting off the short-circuit fault current or breaking the direct current is ensured to be completed.
Drawings
Fig. 1 is a schematic structural view of a device for improving the pressure resistance level and the current capacity of a voltage-controlled material in embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a voltage-controlled material unit using a vacuum chamber in embodiment 1 of the present invention.
FIG. 3 is a schematic circuit diagram of the device for improving the voltage-controlled material voltage-withstand level and current-carrying capacity for current transfer according to the present invention.
FIG. 4 is a flow chart of a method for current diversion by the device for improving the voltage-controlled material voltage-resistant level and current capacity in the embodiment of the invention.
Fig. 5 is a schematic structural diagram of a voltage control material unit using an insulating gas chamber in embodiment 2 of the present invention.
In the figure, 1, a voltage control material unit; 2. a compression spring; 3. a connecting rod; 4. a repulsion mechanism; 5. a permanent magnet mechanism; 6. a voltage controlled material module; 7. an arc extinguishing chamber; 8. a branch to be transferred; 11. an insulating chamber; 12. a first metal electrode; 13. a second metal electrode; 14. a voltage control material; 15. a pressure gauge; 16. a bellows; 17. an air inlet; 18. and an air outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1, the device for improving the pressure resistance level and the current capacity of the pressure-controlled material comprises a pressure-controlled material unit 1(IPCM unit), a compression spring 2, a connecting rod 3, a repulsion mechanism 4 for opening a brake and a permanent magnet mechanism 5(PMA unit) for closing the brake. The compression spring 2 is located between the pressure-controlled material unit 1 and the connecting rod 3, and is used for connecting the pressure-controlled material unit 1 and the connecting rod 3. The repulsion mechanism 4 and the permanent magnetic mechanism 5 are fixedly connected by a connecting rod 3, and the connecting rod 3 is used as a power transmission rod of the repulsion mechanism 4 and the permanent magnetic mechanism 5 to respectively complete the switching-on and switching-off operations.
As shown in fig. 2, the voltage-controlled material 14 unit 1 includes a first metal electrode 12, a second metal electrode 13, a voltage-controlled material 14 and an insulating chamber 11, the insulating chamber 11 is an insulating environment, the voltage-controlled material 14 is disposed in the insulating chamber 11, the first metal electrode 12 and the second metal electrode 13 are respectively used as end caps at two ends of the insulating chamber 11, the first metal electrode 12, the voltage-controlled material 14 and the second metal electrode 13 are connected in series, a system current flows in from the first metal electrode 12 and flows out from the second metal electrode 13, the second metal electrode 13 is connected with one end of a compression spring 2, the other end of the compression spring 2 is connected with a connecting rod 3, and the connecting rod 3 is connected with a repulsion mechanism 4 and a permanent magnet mechanism 5.
In this embodiment, the inside of the insulating chamber 11 is a vacuum environment, and the insulating chamber 11 is a closed container made of an insulating material. The first metal electrode 12 is used as an end cover of the insulating chamber 11, the contact surface is fixed into a whole through screws, and the system current flows in through the first metal electrode 12; the second metal electrode 13 is used as the end cover of the other end of the insulating chamber 11, and under the operation of the repulsion mechanism 4 and the permanent magnet mechanism 5, the second metal electrode 13 can make a small displacement motion in the vertical direction in fig. 2, and the system current flows out through the second metal electrode 13.
A bellows 16 for sealing is arranged between the second metal electrode 13 and the insulating chamber 11, one end of the bellows 16 is connected with the insulating chamber 11, and the other end is welded on the second metal electrode 13 and moves along with the movement of the second metal electrode 13. The bellows 16 has a certain elasticity, and the bellows 16 does not obstruct the free movement of the second metal electrode 13, and can prevent air leakage and ensure sealing performance.
The pressure-controlling material 14 is a particulate metal compound, including titanium diboride or titanium carbide, or the like, whose resistance value changes with pressure. The voltage-controlled material 14 is filled in the insulating chamber 11, the filled gas is pumped to vacuum, and the second metal electrode 13 can transmit force to the voltage-controlled material 14 when making a micro-displacement motion, so as to control the resistance value of the voltage-controlled material to change.
Be equipped with the manometer 15 that detects internal pressure on the insulating cavity 11, manometer 15 measurable quantity gas vacuum in the insulating cavity 11 guarantees vacuum environment.
The specific working principle of the invention is as follows: the voltage-controlled material 14 is made of granular metal compound, and because of the existence of tiny gaps between granules, under high voltage, the gaps can be broken down to generate electric arc, so that the voltage-controlled material has low voltage resistance level and low current capacity. By placing the voltage controlled material 14 in an insulating medium, the dielectric strength of the gap of the voltage controlled material 14 is increased, thereby increasing the level of voltage and current withstand of the voltage controlled material 14. In addition, in the embodiment, a vacuum insulating medium is selected, so that good insulating property can be ensured.
FIG. 3 is a schematic circuit diagram of the device for improving the voltage-controlled material voltage-withstand level and current-carrying capacity for current transfer according to the present invention. As shown in fig. 3, the diagram includes: the device for improving the voltage-resistant level and the current capacity of the voltage-controlled material (referred to as a voltage-controlled material module 6), a circuit breaker arc-extinguishing chamber 7 and a branch 8 to be transferred, wherein the voltage-controlled material module 6 is connected with the circuit breaker arc-extinguishing chamber 7 in series and then connected with the branch 8 to be transferred in parallel. When current transfer is carried out, the voltage-controlled material module 6 is matched with the arc extinguish chamber 7 of the circuit breaker together, current is driven to be transferred to the branch 8 to be transferred, and the current transfer process is completed.
As shown in fig. 4, the method for transferring current by using the above device includes the following steps:
firstly, putting a voltage-controlled material into an insulation chamber 11, filling an insulation medium into a voltage-controlled material current transfer device, and specifically, pumping the insulation chamber 11 to a vacuum insulation state (or filling insulation gases such as sulfur hexafluoride, carbon dioxide and nitrogen);
secondly, assembling a device (voltage-controlled material module 6) which is used for improving the voltage-controlled material voltage-resistant level and the current capacity with the first metal electrode 12 and the second metal electrode 13;
thirdly, connecting the voltage-controlled material module 6 with the arc extinguish chamber 7 in series and then connecting the voltage-controlled material module with the branch 8 to be transferred in parallel, and assembling the voltage-controlled material current transfer device shown in the figure 3;
fourthly, the repulsion mechanism 4 is driven to carry out opening operation, the repulsion mechanism 4 drives the connecting rod 3 to move downwards, the compression spring 2 is driven to change from a compression state to a free extension state, and the second metal electrode 13 is driven to move downwards;
and fifthly, the arc extinguish chamber 7 is driven to be opened to generate electric arc, and the arc extinguish chamber 7 and the voltage-controlled material module 6 act together to drive current to be transferred to the branch 8 to be transferred to finish current transfer operation.
The branch 8 to be transferred can be a current-limiting reactor, and fault current is quickly transferred to the current-limiting reactor by the method to complete the function of fault current limiting; the branch 8 to be transferred may also be a power electronic device, and the function of switching on and off the dc current is completed by quickly transferring the dc current to the power electronic device.
When current transfer needs to occur, the repulsion mechanism 4 is driven to perform opening operation to generate electric repulsion, the pressure borne by the voltage-controlled material 14 is reduced, the resistance value of the voltage-controlled material is increased, and meanwhile, the voltage-controlled material is matched with the arc extinguish chamber 7 together to drive current to be transferred to the branch 8 to be transferred to complete the current transfer process, and in addition, the current limiting process can also be completed by bearing larger short-circuit current in the transfer process.
Example 2:
as shown in fig. 5, the difference from embodiment 1 is that the insulating chamber 11 is filled with an insulating medium, and the insulating medium includes insulating gas such as sulfur hexafluoride, carbon dioxide, and nitrogen. The insulating chamber 11 is provided with a gas inlet 17 and a gas outlet 18, the gas outlet 18 can discharge residual gas in the insulating chamber 11, and the gas inlet 17 can be filled with insulating gas. Meanwhile, the pressure of the gas gauge in the insulating cavity 11 is measured through the pressure gauge 15, and the purpose of controlling the pressure is achieved. Generally, the air pressure in the insulating cavity 11 is controlled to be 2-6 atmospheric pressures, so that good insulating property can be achieved, and the process of filling insulating gas is simple to operate and convenient to practical application.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A device for improving the pressure resistance level and the current capacity of a pressure-controlled material is characterized in that: the voltage-controlled material switching device comprises a voltage-controlled material unit (1), a compression spring (2), a connecting rod (3), a repulsion mechanism (4) for switching off and a permanent magnet mechanism (5) for switching on, wherein the voltage-controlled material unit (1) comprises a first metal electrode (12), a second metal electrode (13), a voltage-controlled material (14) and an insulating cavity (11), the voltage-controlled material (14) is arranged in the insulating cavity (11), and the voltage-controlled material (14) is a metal compound with resistance value changing along with pressure change; the first metal electrode (12) and the second metal electrode (13) are respectively used as end covers at two ends of the insulating cavity (11), the first metal electrode (12), the voltage-controlled material (14) and the second metal electrode (13) are sequentially connected, system current flows in from the first metal electrode (12) and flows out from the second metal electrode (13), the second metal electrode (13) is connected with one end of the compression spring (2), the other end of the compression spring (2) is connected with the connecting rod (3), and the connecting rod (3) is connected with the repulsion mechanism (4) and the permanent magnet mechanism (5); the insulating cavity (11) is filled with insulating gas; a corrugated pipe (16) is arranged between the second metal electrode (13) and the insulating cavity (11), one end of the corrugated pipe (16) is connected with the insulating cavity (11) in a sealing mode, and the other end of the corrugated pipe is connected with the second metal electrode (13) in a sealing mode.
2. The device for improving the pressure resistance level and the current capacity of the voltage-controlled material according to claim 1, wherein: the insulating gas is sulfur hexafluoride, carbon dioxide or nitrogen.
3. The device for improving the pressure resistance level and the current capacity of the voltage-controlled material according to claim 2, wherein: the insulation chamber (11) is provided with an air inlet (17) and an air outlet (18), and the insulation chamber (11) is provided with a pressure gauge (15) for detecting internal pressure.
4. The device for improving the pressure resistance level and the current capacity of the voltage-controlled material according to claim 1, wherein: the pressure-controlled material (14) is titanium diboride or titanium carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565465.3A CN112713052B (en) | 2020-12-25 | 2020-12-25 | Device for improving pressure-resistant level and current capacity of pressure-controlled material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565465.3A CN112713052B (en) | 2020-12-25 | 2020-12-25 | Device for improving pressure-resistant level and current capacity of pressure-controlled material |
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| CN112713052A CN112713052A (en) | 2021-04-27 |
| CN112713052B true CN112713052B (en) | 2022-08-12 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2338837A (en) * | 1998-06-23 | 1999-12-29 | Asea Brown Boveri | Current control element switched by a magnetic field |
| JP6595428B2 (en) * | 2016-09-16 | 2019-10-23 | 株式会社東芝 | Lightning arrestor |
| CN106356817A (en) * | 2016-09-27 | 2017-01-25 | 西安交通大学 | Bridge type bidirectional non-arc direct-current circuit breaker |
| CN206225274U (en) * | 2016-11-01 | 2017-06-06 | 唐恩(厦门)电气有限公司 | A kind of hybrid ZVT breaker |
| CN108831806B (en) * | 2018-06-19 | 2019-11-15 | 大连理工大学 | It is a kind of to control the device of electric current fast transfer, method and system |
| CN110729087B (en) * | 2019-10-18 | 2021-10-15 | 大连理工大学 | Voltage-controlled material resistance change curve controllable combination device and implementation method |
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