CN117558579A - High-voltage arc switch and working method thereof - Google Patents
High-voltage arc switch and working method thereof Download PDFInfo
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- CN117558579A CN117558579A CN202410038067.8A CN202410038067A CN117558579A CN 117558579 A CN117558579 A CN 117558579A CN 202410038067 A CN202410038067 A CN 202410038067A CN 117558579 A CN117558579 A CN 117558579A
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 127
- 238000000926 separation method Methods 0.000 claims abstract description 81
- 230000008569 process Effects 0.000 claims abstract description 34
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 65
- 238000004146 energy storage Methods 0.000 claims description 59
- 238000007789 sealing Methods 0.000 claims description 14
- 230000002441 reversible effect Effects 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 210000002381 plasma Anatomy 0.000 description 60
- 230000000875 corresponding effect Effects 0.000 description 23
- 238000010586 diagram Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- WSNMPAVSZJSIMT-UHFFFAOYSA-N COc1c(C)c2COC(=O)c2c(O)c1CC(O)C1(C)CCC(=O)O1 Chemical compound COc1c(C)c2COC(=O)c2c(O)c1CC(O)C1(C)CCC(=O)O1 WSNMPAVSZJSIMT-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- H01H33/60—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
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The application discloses a high-voltage arc switch and a working method thereof, wherein the device comprises a contact assembly, an ion generating device, an airflow driving mechanism and an operating mechanism, wherein the contact assembly is arranged on a mounting frame; the fixed contact of the contact assembly is sealed and fixed on the arc extinguishing chamber on the mounting frame, and the moving contact of the contact assembly is sealed and slidably mounted on the arc extinguishing chamber; the ion generating device is used for generating plasma, and the airflow driving mechanism is suitable for driving the insulating gas to firstly lead the plasma into the separation area and then discharging the plasma out of the separation area in the switching-off process; the operating mechanism is suitable for driving the moving contact and the airflow driving mechanism to act. The beneficial effects of this application: and plasma is introduced into the separation area to ensure that the electric arcs generated by the moving contact and the fixed contact in the separation process are dispersed, so that the electric erosion of instantaneous current generated by the electric arcs to the contact is reduced or avoided, and the closing stability of the contact is ensured.
Description
Technical Field
The application relates to the technical field of power equipment, in particular to a high-voltage arc switch and a working method thereof.
Background
The high-voltage switch cabinet is an electrical product for power generation, power transmission, power distribution, electric energy conversion and electric energy on-off, control and protection of an electric power system. The voltage class of the high-voltage switch cabinet is generally 3.6 kV-550 kV.
The high-voltage switch cabinet is internally provided with a high-voltage switch for controlling the on-off of electric energy. When the high-voltage switch is switched off, an arc can be generated between the contacts. In order to inhibit the arc, the existing high-voltage switch generally adopts a vacuum arc-extinguishing switch, and the contacts are separated in the vacuum arc-extinguishing chamber; and the separation speed of the contacts is also increased by the energy storage mechanism. However, even if the contacts are separated, arcs can still be generated for a short time, and the concentration of the arcs generates larger instantaneous current to cause the electric erosion of the contacts, so that poor contact can be caused when the contacts are closed. Therefore, improvements to existing high voltage switches are now urgently needed.
Disclosure of Invention
It is one of the objectives of the present application to provide a high voltage arc switch that overcomes at least one of the above-mentioned drawbacks of the prior art.
Another object of the present invention is to provide a method for operating a high voltage arc switch that solves at least one of the above-mentioned drawbacks of the prior art.
In order to achieve at least one of the above objects, the technical scheme adopted in the application is as follows: a high-voltage arc switch comprises a mounting frame, a contact assembly, an ion generating device, an air flow driving mechanism and an operating mechanism, wherein the contact assembly, the ion generating device, the air flow driving mechanism and the operating mechanism are arranged on the mounting frame; an arc extinguishing chamber is arranged on the mounting frame, the static contact of the contact assembly is fixedly arranged in the arc extinguishing chamber in a sealing manner, and the moving contact of the contact assembly is slidably arranged in the arc extinguishing chamber in a sealing manner; the movable contact and the fixed contact are suitable for forming a separation area in the arc extinguishing chamber when the switch is opened; the ion generating device is used for generating plasma, and the airflow driving mechanism is suitable for driving the insulating gas to firstly lead the plasma into the separation area in the switching-off process, and then discharging the plasma out of the separation area; the operating mechanism is suitable for driving the moving contact and the airflow driving mechanism to act.
Preferably, the side part of the arc extinguishing chamber is respectively provided with an air inlet hole and an air outlet hole which are communicated with the outside; the air inlet is opposite to the closing area of the movable contact and the fixed contact; the air outlet holes are spaced from the air inlet holes along the opening direction, and the spacing distance is the set arc height; the brake separating process comprises a first stage and a second stage; wherein, the first stage: the distance between the moving contact and the separation area from the opening of the gate is equal to the arc height; in the process, the air flow driving mechanism is suitable for leading the plasma into the separation area through the air inlet hole by insulating gas, and the air outlet hole is always in a closed state; and a second stage: the distance between the separation areas is larger than the arc generating height; in this process, the gas flow driving mechanism is adapted to introduce an insulating gas into the separation region so that the plasma located in the separation region is exhausted along the gas outlet holes.
Preferably, the air inlet is communicated with a pipeline for connecting the ion generating device and the air flow driving mechanism; the outer sides of the moving contact and the fixed contact are respectively provided with an insulating part, and the moving contact and the fixed contact are respectively in sealing fit with the arc extinguishing chamber through the insulating parts; so that the ion generating device is adapted to fill the conduit and the inlet holes with plasma before the first stage is performed.
Preferably, the air inlet hole is provided with a first one-way valve outside, and the air outlet hole is provided with a second one-way valve outside; the ion generating device and the air flow driving mechanism are communicated with the air inlet through the pipeline of the first one-way valve; in a second stage of opening, the plasma in the separation region is adapted to be discharged along the second one-way valve; when the corresponding reverse switch-on of the second stage is carried out, the insulating gas in the separation area is suitable for being discharged along the second one-way valve and/or the first one-way valve; and when the corresponding reverse switching-on of the first stage is carried out, the insulating gas of the separation area is suitable for being discharged along the first one-way valve.
Preferably, the operating mechanism comprises a driving device, an operating rod and a first energy storage mechanism; the driving device is fixedly installed, and the operating rod is rotatably installed on the installation frame and is connected with the output end of the driving device; the first energy storage mechanism is arranged on the mounting frame, and the moving contact is connected with the operating rod through the first energy storage mechanism; the driving end of the air flow driving mechanism is also connected with the operating rod, so that the operating rod drives the moving contact and the air flow driving mechanism to act simultaneously under the driving of the driving device.
Preferably, the driving end of the first energy storage mechanism is matched with the operating rod through a hysteresis structure, so that in the process of rotating the operating rod, the first energy storage mechanism triggers and drives the driving mechanism to lag behind the airflow driving mechanism, and then before the first stage, the insulating gas for driving the plasma is pressurized.
Preferably, the driving end of the first energy storage mechanism is provided with a first engagement hole with a regular polygon cross section; the operating rod penetrates through the first engagement hole, and the section of the operating rod is also in a regular polygon; the circumscribed circle corresponding to the section of the operating rod is concentric with the circumscribed circle corresponding to the section of the first engagement hole; and the diameter of the circumscribed circle corresponding to the section of the operating rod is smaller than the diameter of the circumscribed circle corresponding to the section of the first engagement hole and is larger than the diameter of the inscribed circle corresponding to the section of the first engagement hole, so that the hysteresis structure is formed between the operating rod and the first engagement hole.
Preferably, the air flow driving mechanism comprises an air cylinder assembly and a second energy storage mechanism; the ventilation end of the air cylinder assembly is communicated with the air inlet hole through a third one-way valve, and the driving end of the air cylinder assembly is connected with the operating rod through the second energy storage mechanism; the first energy storage mechanism and the second energy storage mechanism comprise a supporting seat, an upper hinged plate, a lower hinged plate, a traction plate, a driving plate and a spring; the support seat is fixed on the mounting frame, the upper end of the upper hinge plate is hinged to the support seat, the lower end of the lower hinge plate is hinged to a piece to be driven, the lower end of the upper hinge plate, the upper end of the lower hinge plate and the first end of the traction plate are hinged together, the driving plate is connected to the operating rod and hinged to the other end of the traction plate, and the spring is sleeved on the piece to be driven and is respectively connected with the support seat and the piece to be driven through two ends; when the spring is in a closed state, the upper hinge plate and the lower hinge plate are at parallel dead point positions, and the spring is in a deformed energy storage state; when the brake is separated, the upper hinge plate and the lower hinge plate are driven to be separated from dead points through the rotation of the operating rod, and the piece to be driven is driven to move through the elasticity of the spring; for the first energy storage mechanism, the to-be-driven piece is the moving contact; for the second energy storage mechanism, the member to be driven is a piston rod of the cylinder assembly.
Preferably, the insulating gas is dry air or an insulating inert gas; the insulating gas is supplied to the gas flow driving mechanism through a gas flow source.
The working method of the high-voltage arc switch comprises the following specific brake separating process:
s100: when receiving the switching-off signal, the ion generating device starts for T time to generate enough plasma;
s200: then starting the operating mechanism to drive the moving contact and the airflow driving mechanism to act;
s300: the separation area distance X between the moving contact and the fixed contact is more than or equal to a set threshold value X 0 When the ion generating device is closed; wherein the threshold value X 0 The value of (2) is less than or equal to arc height H.
Compared with the prior art, the beneficial effect of this application lies in:
according to the method, a traditional brake separating process can be divided into two stages according to the brake separating distance, and in the former stage, the electric arcs generated in the separation process of the moving contact and the fixed contact can be ensured to be dispersed by introducing plasma into the separation area; the interval between the movable contact and the fixed contact is separated by discharging the plasma in the later stage. Compared with the traditional vacuum arc extinguishing mode, the method can effectively reduce the instantaneous current value generated by the arc, and further reduce or avoid the electric erosion of the contact to ensure the closing stability of the contact.
Drawings
Fig. 1 is a schematic view of the overall structure of a circuit breaking device according to the present invention.
Fig. 2 is a schematic view of the whole structure of the mounting frame in the present invention.
Fig. 3 is a schematic cross-sectional view of the contact assembly of the present invention installed in an arc chute.
Fig. 4 is a schematic diagram illustrating an exploded state of the first energy storage mechanism according to the present invention.
Fig. 5 is a schematic diagram of a state of the first energy storage mechanism for storing energy in the present invention.
Fig. 6 is a schematic diagram of a matching structure of the first driving plate and the operation lever in the present invention.
Fig. 7 is a schematic diagram of a state in which the first energy storage mechanism performs energy storage and release in the present invention.
Fig. 8 is a schematic view showing an exploded state of the air flow driving mechanism in the present invention.
Fig. 9 is a schematic diagram of a state of the air flow driving mechanism for air storage and energy storage in the present invention.
Fig. 10 is a schematic diagram of a state in which the air flow driving mechanism performs air storage and release in the present invention.
Fig. 11 is a schematic overall sectional structure of the interrupt device of the present invention.
FIG. 12 is a schematic diagram showing a partial structure of the interrupt device in the preparation stage of opening the gate according to the present invention.
FIG. 13 is a schematic diagram showing a partial structure of the interrupt device in the first stage of opening the gate.
FIG. 14 is a schematic diagram showing a partial structure of the interrupt device in the second stage of opening the gate according to the present invention.
In the figure: the device comprises a mounting frame 1, an arc extinguishing chamber 11, an arc extinguishing chamber 110, an air inlet hole 111, an air outlet hole 112, a fixed seat 12, a contact assembly 2, a separation area 200, an insulating part 201, a fixed contact 21, a lower wiring board 211, a moving contact 22, an upper wiring board 221, an operating rod 3, a first energy storage mechanism 4, a first supporting seat 41, a first upper hinge plate 42, a first lower hinge plate 43, a first traction board 44, a first driving plate 45, a first engagement hole 450, a first spring 46, an ionizer 500, an air flow driving mechanism 6, an air cylinder assembly 61, an air cylinder 611, a piston rod 612, a piston 613, a second energy storage mechanism 62, a second supporting seat 621, a second upper hinge plate 622, a second lower hinge plate 623, a second traction board 624, a second driving plate 625, a second engagement hole 6250, a second spring 626, a first check valve 71, a second check valve 72, a third check valve 73, a fourth check valve 74, an exhaust pipe 81 and an air guide pipe 82.
Detailed Description
The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
In the description of the present application, it should be noted that, for the azimuth terms such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific protection scope of the present application that the device or element referred to must have a specific azimuth configuration and operation, as indicated or implied.
It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present application are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
In one aspect, a high voltage arc switch is disclosed, as shown in fig. 1-14, wherein a preferred embodiment includes a mounting frame 1 of insulating material, and a contact assembly 2, an ion generating device, an airflow driving mechanism 6 and an operating mechanism mounted on the mounting frame 1. The mounting frame 1 is fixedly arranged for mounting the whole high-voltage arc switch; the arc extinguishing chamber 110 is provided on the mounting frame 1. The contact assembly 2 comprises a fixed contact 21 and a movable contact 22, wherein the fixed contact 21 can be fixedly arranged at one end of the arc extinguishing chamber 110 in a sealing way, and the movable contact 22 of the contact assembly 2 can be slidably arranged at the other end of the arc extinguishing chamber 110 in a sealing way, so that the movable contact 22 can perform sealing movement relative to the fixed contact 21 in the arc extinguishing chamber 110 to realize opening and closing; and a separation area 200 may be formed between the moving contact 22 and the fixed contact 21 in the arc extinguishing chamber 110 when the opening is performed. The ion generating device is used for generating plasma, and the airflow driving mechanism 6 can drive the insulating gas to lead the plasma into the separation area 200 first in the switching-off process, and then discharge the plasma out of the separation area 200. The operating mechanism can drive the movable contact 22 and the airflow driving mechanism 6 to perform corresponding actions.
It can be appreciated that the conventional arc extinguishing chamber 110 has a vacuum structure, and the rapid arc extinguishing is realized by using excellent insulation of vacuum during the opening process. Compared with the traditional mode, the static contact 21 and the moving contact 22 are installed in the arc extinguishing chamber 110 in a sealing mode, so that when the static contact 21 and the moving contact 22 are separated, a separation area 200 can be formed between the static contact 21 and the moving contact 22, and the separation area 200 can be kept isolated from other areas of the arc extinguishing chamber 110.
In the process of opening the gate, plasma can be introduced into the separation area 200, the plasma has good conductivity, and the moving contact 22 and the fixed contact 21 can be ensured to be separated, but the moving contact and the fixed contact can be conducted through the plasma. Since the plasma fills the entire separation area 200, the electric arcs generated by the separation of the moving contact 22 and the fixed contact 21 can be dispersed. Compared with the traditional vacuum arc extinction, the instant current impact of a traditional arc on a certain point of the contact can be diffused into the instant current impact of the whole contact, and then the electric erosion of the diffused arc on the contact can be effectively reduced or avoided, so that the end face quality of the contact is ensured, and the contact stability of the contact closing is improved.
After the moving contact 22 and the fixed contact 21 are separated by a set distance, the plasma can be discharged by introducing insulating gas into the separation area 200, so that the actual separation of the moving contact 22 and the fixed contact 21 is realized, at the moment, an electric arc cannot be generated between the moving contact 22 and the fixed contact 21 due to a long distance, and the separation safety of the moving contact 22 and the fixed contact 21 can be further ensured.
For ease of understanding, the following description may be given by way of parameters.
The instantaneous current of the arc formed when the moving contact 22 and the fixed contact 21 are opened is assumed to be a, and the end surface areas of the moving contact 22 and the fixed contact 21 are assumed to be S. It should be noted that the arc formed by the conventional vacuum arc extinguishing method can be regarded as having a certain sectional area S 0 Is a "line" of this cross-sectional area S 0 Is very small, supposedly S 0 =s/100; the unit current of the arc formed by the traditional vacuum arc extinguishing mode to the arc contact point on the end face of the contact is A/S 0 =100A/S. In the present embodiment, when the moving contact 22 and the fixed contact 21 are separated, since the separation area 200 is filled with plasma, it can be considered that the whole end surfaces of the moving contact 22 and the fixed contact 21 are in contact with the arc, and the unit current of the arc to the arc contact point on the end surface of the contact is a/S. That is, by adopting the mode of the embodiment, compared with the traditional mode, the instantaneous current of the arc to the end face of the contact can be reduced by 100 times, and then the electric erosion of the arc to the contact can be avoided or reduced.
It should be noted that the mounting frame 1 is provided with a plurality of arc extinguishing chambers 110, and each arc extinguishing chamber 110 is correspondingly provided with a contact assembly 2. Generally, the high voltage arc switch is used for three-phase power, so the number of arc extinguishing chambers 110 is three, and the number of corresponding contact assemblies 2 is also three. The ion generating device can generate plasmas into the three arc extinguishing chambers 110 at the same time, and the air flow driving mechanism 6 can simultaneously introduce insulating gas into the three arc extinguishing chambers 110 under the driving of the operating mechanism. The insulating gas may be dry air or an inert gas having good insulation.
Specifically, as shown in fig. 2 and 3, three arc-extinguishing chambers 11 are neatly and fixedly installed on the installation frame 1, and an inner cavity of each arc-extinguishing chamber 11 is an arc-extinguishing chamber 110. The fixed contact 21 is fixedly arranged at the lower part of the arc extinguishing chamber 110, and the contact side wall of the fixed contact 21 is in sealing fit with the side wall of the arc extinguishing chamber 110 so as to prevent plasma from entering into the lower space of the arc extinguishing chamber 110; the trolley bars of the stationary contact 21 protrude to the outside of the arc chute 11 along the lower end of the arc chute 110 for connection to the lower terminal plate 211. The movable contact 22 is slidably mounted on the upper portion of the arc extinguishing chamber 110, and the contact side wall of the movable contact 22 is in sealing fit with the side wall of the arc extinguishing chamber 110, so as to prevent plasma from entering into the lower space of the arc extinguishing chamber 110; meanwhile, the contact rod of the moving contact 22 extends out of the upper end of the arc-extinguishing chamber 11 to be used for connecting the upper wiring board 221 and the operating mechanism, and the contact rod is in clearance fit with the through hole at the upper end of the arc-extinguishing chamber 11, so that the pressure of the upper space of the arc-extinguishing chamber 110 can be kept balanced in the moving process of the moving contact 22.
In this embodiment, there are various ways of introducing the plasma and the insulating gas into the separation area 200 during the opening process, one of which is shown in fig. 3, 11 to 14, and the side portion of the arc extinguishing chamber 11 is provided with an air inlet hole 111 and an air outlet hole 112 for communicating the arc extinguishing chamber 110 with the outside, respectively; wherein, the air inlet hole 111 is opposite to the closing area of the movable contact 22 and the fixed contact 21; the air outlet holes 112 are spaced from the air inlet holes 111 along the opening direction, and the spacing distance is the set arc height. The ion generating device and the air flow driving mechanism 6 are communicated with the air inlet hole 111; the particular opening process may include a first phase and a second phase that are performed sequentially. Wherein, the first stage: the distance between the moving contact 22 and the separation area 200 from the opening of the brake is equal to the arc height under the drive of the operating mechanism; in this process, the air flow driving mechanism 6 can introduce the plasma into the separation region 200 through the air inlet 111 by the insulating gas, and the air outlet 112 is always closed in the first stage. And a second stage: the separation region 200 has a spacing greater than the arc height; in this process, the gas flow driving mechanism 6 may introduce the insulating gas into the separation region 200, so that the plasma originally located in the separation region 200 is discharged along the gas outlet 112.
It should be noted that the arc generating height is the maximum distance that the two energized conductors can generate an arc due to the spacing, i.e. beyond this distance no arc will be generated between the two energized conductors. The specific arc height setting can be determined according to the voltage value of the energized conductor and environmental factors.
It can be understood that the distance between the air inlet hole 111 and the air outlet hole 112 is set to be equal to or less than the arc height, so that the moving contact 22 and the fixed contact 21 can be kept electrically conductive by the plasma while the moving contact 21 and the moving contact 22 are separated from each other. When the distance between the fixed contact 21 and the moving contact 22 is greater than the arc generating height, an arc may not be generated between the fixed contact 21 and the moving contact 22, and at this time, the plasma in the separation area 200 may be discharged to realize the real separation of the fixed contact 21 and the moving contact 22.
In this embodiment, as shown in fig. 1, the ion generating device includes at least one ion generator 500, and the specific structure and operation principle of the ion generator 500 are known to those skilled in the art, and the ion generator 500 can generate plasma and pass into the separation region 200. The ion generating device may include one ion generator 500 having a large power to simultaneously supply plasma to three arc extinguishing chambers 110; three ionizers 500 of relatively small power may also be provided to provide plasma to the individual arc extinguishing chambers 110, respectively.
It should be appreciated that in order to further reduce or avoid arcing, the plasma needs to be introduced into the separation region 200 at the moment the moving contact 22 begins to move; the inlet aperture 111 needs to be filled with plasma before opening to ensure that plasma enters the separation region 200 at the moment of opening.
Specifically, as shown in fig. 3 and 12 to 14, a pipeline communicating with the air inlet hole 111 is installed outside the arc extinguishing chamber 11, and the ionizer 500 and the airflow driving mechanism 6 may communicate with the air inlet hole 111 through the pipeline. Meanwhile, the outer sides of the moving contact 22 and the fixed contact 21 are provided with insulating parts 201, and the moving contact 22 and the fixed contact 21 are in sealing fit with the side wall of the arc extinguishing chamber 110 through the insulating parts 201. So that the ionizer 500 fills the piping and the intake hole 111 with plasma before proceeding with the first stage.
It will be appreciated that, because the plasma has a strong conductivity, if the air inlet 111 and the pipeline are filled with the plasma before the opening, the voltage on the contact assembly 2 will be transferred into the pipeline through the plasma, and thus an electric leakage accident may occur. In this embodiment, the outer sides of the moving contact 22 and the fixed contact 21 are provided with the insulating portion 201, so that the plasma introduced into the air inlet 111 contacts with the insulating portion 201 of the moving contact 22 and the fixed contact 21 before opening the switch, and the insulating portion 201 can isolate the voltage of the contact assembly 2.
It should be noted that the specific structure of the insulating portion 201 is a known technology of a person skilled in the art, and may be an insulating coating or a protective shell made of an insulating material; for example, the insulating portion 201 is made of a ceramic material, which not only has good insulation, but also has good wear resistance and sealing property, and a low friction coefficient, so that the moving contact 22 can be ensured to rapidly perform sealing movement, and the service life is relatively long.
In this embodiment, as shown in fig. 3 and 12 to 14, the first check valve 71 communicating with the air inlet hole 111 and the second check valve 72 communicating with the air outlet hole 112 are installed at the outside of the arc extinguishing chamber 11. The first check valve 71 is a pipeline on one side close to the air inlet hole 111, and the valve body structure is arranged on one side far away from the air inlet hole 111. The ionizer 500 and the air flow driving mechanism 6 communicate with the air intake hole 111 through the pipe of the first check valve 71.
So that the ionizer 500 fills the piping of the first check valve 71 and the air intake hole 111 with plasma before proceeding with the first stage. During the second phase of opening, the plasma in the separation region 200 may be forced to open and vent the second check valve 72. When the reverse switch-on corresponding to the second stage is performed, both the air inlet hole 111 and the air outlet hole 112 are communicated with the separation area 200, so that the insulating gas in the separation area 200 can open and discharge the second check valve 72 and/or the first check valve 71 under the pressure. When the reverse closing corresponding to the first stage is performed, the insulating gas in the separation region 200 may open and discharge the first check valve 71 under pressure.
It should be noted that, by providing the check valve to communicate the air inlet 111 and the air outlet 112 with the outside, the air in the outside environment can be isolated from entering the positions of the air inlet 111 and the air outlet 112 while the air in the separation area 200 is conveniently discharged, so as to avoid the influence of the mixed humid air on the separation safety.
Meanwhile, as shown in fig. 1 and 3, one end of the second check valve 72 corresponding to the three arc extinguishing chambers 110, which is far away from the arc extinguishing chambers 110, is communicated through the exhaust pipe 81; therefore, in the process of opening the switch, the exhausted plasma can be directionally collected through the exhaust pipe 81, so that the influence of the plasma exhausted into the switch cabinet on the circuits of other electronic components is avoided.
It should also be appreciated that in order to avoid plasma generated by the ionizer 500 from entering the gas flow drive mechanism 6, and that the gas flow drive mechanism 6 drives insulating gas into the ionizer 500. As shown in fig. 12 to 14, the ventilation end of the airflow driving mechanism 6 may be in communication with the pipe of the first check valve 71 through the third check valve 73, and the output end of the ionizer 500 may be in communication with the pipe of the first check valve 71 through the fourth check valve 74. The air flow driving mechanism 6 can only introduce the insulating air into the pipeline along the third one-way valve 73, and the air in the pipeline cannot reversely open the third one-way valve 73; similarly, the plasma generated by the ionizer 500 can only enter the pipeline along the fourth check valve 74, and the gas in the pipeline cannot reversely open the fourth check valve 74.
It should be noted that the first check valve 71, the second check valve 72, the third check valve 73 and the fourth check valve 74 are all check valves made of insulating materials, such as ceramic check valves; the good insulation can be used to isolate the voltage propagation when the plasma is in contact with the contact assembly 2.
In the present embodiment, as shown in fig. 1, 5 and 7, the operating mechanism includes a driving device (not shown), an operating lever 3 and a first energy storage mechanism 4. The driving device is fixedly installed, and can be installed in the installation frame 1 or in the switch cabinet. The operating rod 3 is rotatably arranged on the mounting frame 1 and is connected with the output end of the driving device, and then the operating rod 3 can rotate under the driving of the driving device. The first energy storage mechanism 4 is arranged on the mounting frame 1, and the movable contact 22 is connected with the operating rod 3 through the first energy storage mechanism 4; the driving end of the air flow driving mechanism 6 is also connected with the operating rod 3, so that when the operating rod 3 is driven to rotate by the driving device, the moving contact 22 and the air flow driving mechanism 6 can be driven to act simultaneously.
It should be noted that the specific structure and working principle of the driving device are known to those skilled in the art, and common driving devices include a motor, a rotary cylinder, a rotary hydraulic cylinder, and the like, and in this embodiment, the motor is preferably used.
Specifically, the first energy storage mechanism 4 has various specific structures, one of which is shown in fig. 4, 5 and 7, and the first energy storage mechanism 4 includes a first support seat 41, a first upper hinge plate 42, a first lower hinge plate 43, a first traction plate 44, a first driving plate 45 and a first spring 46. The first supporting seat 41 is fixedly arranged on the upper part of the mounting frame 1 through a fastener; the first upper hinge plate 42 is hinged to the upper part of the first supporting seat 41 through the upper end, and the first lower hinge plate 43 is hinged to the contact rod end part of the moving contact 22 through the lower end; the first upper hinge plate 42 is hinged by a lower end to an upper end of the first lower hinge plate 43. The first driving plate 45 is mounted to the operating lever 3 and is hinged together with the hinge positions of the first upper hinge plate 42 and the first lower hinge plate 43 by the first traction plate 44. The first spring 46 is sleeved on the contact rod of the moving contact 22, and two ends of the first spring 46 are respectively connected with the moving contact 22 and the first supporting seat 41. When the movable contact 22 and the fixed contact 21 are in a closing state, the first upper hinge plate 42 and the first lower hinge plate 43 are in a dead point position aligned in parallel, and the first spring 46 is in a stretched energy storage state; the dead point can keep the energy storage of the first spring 46 and the closing of the movable contact 22 and the fixed contact 21 stable. When the switch-off is performed, the first upper hinge plate 42 and the first lower hinge plate 43 can be driven to be separated from the dead point by the rotation of the operating rod 3, and the movable contact 22 can be driven to rapidly perform the switch-off motion by the elastic force of the first spring 46.
It will be appreciated that in order to ensure the opening speed of the moving contact 22, the first spring 46 may be a rectangular spring.
In the present embodiment, as shown in fig. 1, 9 to 11, the air flow driving mechanism 6 includes an air cylinder assembly 61 and a second energy storage mechanism 62; the ventilation end of the cylinder assembly 61 is communicated with the air inlet hole 111 through the third one-way valve 73, and the driving end of the cylinder assembly 61 can be connected with an operating mechanism, so that the cylinder assembly 61 is driven to act through the operating mechanism.
It will be appreciated that there are various ways in which the actuator may be drivingly connected to the driving end of the cylinder assembly 61, for example, by the lever 3 being connected to the driving end of the cylinder assembly 61, and further by the lever 3 being rotated to drive the cylinder assembly 61 to deliver the insulating gas. However, considering that the operating rod 3 also needs to drive the moving contact 22 to act, and the moving contact 22 can generate a faster moving speed through the first energy storage mechanism 4; so in order to avoid the connection between the cylinder assembly 61 and the operating rod 3 to interfere the movement of the moving contact 22, the airflow driving mechanism 6 further comprises a second energy storage mechanism 62, and the driving end of the cylinder assembly 61 is connected with the operating rod 3 through the second energy storage mechanism 62, so that when the operating rod 3 acts, the cylinder assembly 61 can rapidly carry out air conveying under the driving of the second energy storage mechanism 62.
Specifically, as shown in fig. 1, 2, and 9 to 11, the cylinder assembly 61 includes a cylinder body 611 and a piston rod 612. The cylinder body 611 is fixedly installed on a fixed seat 12 arranged on the installation frame 1, and the piston rod 612 is vertically and slidably installed on the cylinder body 611 and is in sealing sliding fit with the inner wall of the cylinder body 611 through a piston 613 at the lower end. The upper end of the piston rod 612 is connected with the operating rod 3 through the second energy storage mechanism 62, and when the operating rod 3 rotates, the piston rod 612 can be driven by the second energy storage mechanism 62 to drive the piston 613 to slide along the cylinder 611 so as to realize the conveying of insulating gas.
It will be appreciated that piston rod 612 may be moved up for the delivery of insulating gas or moved down for the delivery of insulating gas; in order to adapt the following moving contact 22, this embodiment allows the delivery of the insulating gas when the piston rod 612 is moved up. As shown in fig. 9 to 11, the upper side wall of the cylinder 611 is provided with a vent hole, the vent hole is connected to the air duct 82 outside the cylinder 611, and one end of the air duct 82 away from the vent hole is communicated with the pipeline of the first check valve 71 through the third check valve 73. The third one-way valve 73 is a double-head valve, and the air duct 82 is connected to the middle part of the third one-way valve 73; a first end of the third one-way valve 73 is for connection to a line of the first one-way valve 71 and a second end of the third one-way valve 73 is for connection to a source of gas flow generating an insulating gas. When the piston 613 moves upward on the rod 612, the insulating gas at the upper portion of the cylinder 611 may flow into the third check valve 73 along the gas guide pipe 82, thereby opening the first head of the third check valve 73 to flow into the pipe of the first check valve 71 until it reaches the separation region 200. When the piston rod 612 drives the piston 613 to move downward, the pressure difference in the upper space of the cylinder 611 drives the second head of the third check valve 73 to open, so that the insulating gas generated by the gas flow source is pumped into the upper space of the cylinder 611 along the gas guide tube 82. The lower end of the cylinder 611 is provided with a through hole for balancing the pressure of the lower portion of the cylinder 611 when the piston 613 moves.
In particular, the specific structure of the second energy storage mechanism 62 may be various, and for convenience, the second energy storage mechanism 62 may be designed to be the same as or similar to the first energy storage mechanism 4. The second energy storage mechanism 62 includes a second support seat 621, a second upper hinge plate 622, a second lower hinge plate 623, a second traction plate 624, a second drive plate 625, and a second spring 626, as shown in fig. 9 to 11. The second supporting seat 621 is fixedly installed at the upper part of the installation frame 1 through a fastener; the second upper hinge plate 622 is hinge-mounted to an upper portion of the second support seat 621 through an upper end, and the second lower hinge plate 623 is hinge-mounted to an end portion of the piston rod 612 through a lower end; the second upper hinge plate 622 is hinged by a lower end to an upper end of the second lower hinge plate 623. The second driving plate 625 is mounted to the operating lever 3 and is hinged together with the hinge positions of the second upper hinge plate 622 and the second lower hinge plate 623 by the second traction plate 624. The second spring 626 is sleeved on the piston rod 612, and two ends of the second spring 626 are respectively connected with the piston rod 612 and the second supporting seat 621. When the movable contact 22 and the fixed contact 21 are in the closed state, the second upper hinge plate 622 and the second lower hinge plate 623 are in the dead point positions aligned in parallel, and the second spring 626 is in the stretched energy storage state; the second spring 626 can be stored energy by the dead point and the operating lever 3 can be stabilized. When the opening is performed, the second upper hinge plate 622 and the second lower hinge plate 623 are driven to be separated from the dead point by the rotation of the operating rod 3, and the piston rod 612 is driven to rapidly drive the piston 613 to move by the elastic force of the second spring 626 so as to convey the insulating gas.
It should be noted that, since the moving contact 22 and the fixed contact 21 are mounted in a sealed manner with the arc extinguishing chamber 110, the process of forming the separation area 200 is essentially a pumping process, i.e., the separation area 200 actively pumps the plasma in the air inlet 111 into the separation area 200 during the forming process in order to balance the internal pressure difference. However, the pressure difference in the pipe is reduced, and the third check valve 73 needs to be opened to perform pressure equalization. In contrast, in the process of forming the separation region 200, although the plasma enters the separation region 200, the overall gas pressure of the region formed by the connection between the separation region 200 and the pipeline is smaller than the external gas pressure, so that a blocking force is generated on the movement of the moving contact 22 to reduce the opening speed of the moving contact 22.
Therefore, the driving end of the first energy storage mechanism 4 is matched with the operating rod 3 through a hysteresis structure, so that in the process of rotating the operating rod 3, the first energy storage mechanism 4 triggers and drives the air flow driving mechanism 6 to lag behind, and then the insulating gas for driving the plasma to flow is pressurized before the first stage is carried out. Therefore, the air pressure of the separation area 200 can be kept balanced with the external air pressure all the time in the process of forming the separation area 200 by separating the movable contact 22, even the air pressure of the separation area 200 can be larger than the external air pressure, and further, an extra driving force can be provided for separating the movable contact 22 by the air pressure in the separation area 200 so as to further accelerate the separation process of the movable contact 22.
In this embodiment, the specific structure of the hysteresis structure is various, including but not limited to the following two.
Structure one: as shown in fig. 6, the driving end of the first energy storage mechanism 4, that is, the first driving plate 45 is provided with a first engagement hole 450 having a regular polygon cross section. The operation rod 3 may penetrate through the first engagement hole 450, and the cross section of the operation rod 3 is also regular polygon. The circumscribed circle corresponding to the cross section of the operation rod 3 is concentric with the circumscribed circle corresponding to the cross section of the first engagement hole 450; the diameter of the circumscribed circle corresponding to the cross section of the operation lever 3 is smaller than the diameter of the circumscribed circle corresponding to the cross section of the first engagement hole 450 and larger than the diameter of the inscribed circle corresponding to the cross section of the first engagement hole 450, and a hysteresis structure with a hysteresis angle α is formed between the operation lever 3 and the first engagement hole 450.
And (2) a structure II: the first driving plate 45 is provided with a first engagement hole 450 with a circular cross section, the operation rod 3 penetrates through the first engagement hole 450, and the cross section of the operation rod 3 is circular with an adaptive size. The side portion of the first engagement hole 450 is provided with an avoidance groove along the circumferential direction, and a lever section of the operating lever 3 corresponding to the first engagement hole 450 is provided with a butting block extending into the avoidance groove. When in closing, the operating rod 3 is propped against the first end of the avoidance groove through the propping block; when the brake is separated, the operating rod 3 can drive the abutting block to rotate towards the second end position of the avoidance groove, after the angle alpha is rotated, the abutting block abuts against the second end of the avoidance groove, and then the first driving plate 45 rotates along with the operating rod 3 to trigger the first energy storage mechanism 4.
Specifically, the first engagement hole 450 and the operation lever 3 have a plurality of regular polygons corresponding to each other in cross section, and for example, as shown in fig. 6, the first engagement hole 450 and the operation lever 3 have regular polygons corresponding to each other in cross section. The edge of the operating lever 3 abuts against the corresponding side of the first engagement hole 450 when closing the switch. When the brake is released, the operating lever 3 rotates, at this time, the first engagement hole 450 is separated from the operating lever 3 until the operating lever 3 rotates by an angle α, the operating lever 3 again abuts against the corresponding side edge of the first engagement hole 450, and then the operating lever 3 drives the first driving plate 45 to trigger the first energy storage mechanism 4. In the process of starting to rotate the operating rod 3 to the angle alpha, the second driving plate 625 drives the second energy storage mechanism 62 to trigger, so that the piston rod 612 drives the piston 613 to move upwards for a certain distance when the moving contact 22 does not move yet, and the insulating gas at the upper part of the cylinder 611 is pressurized until the first end of the third one-way valve 73 is in a state to be opened or is opened. When the first energy storage mechanism 4 is triggered to drive the movable contact 22 to move, the pressurized insulating gas and the suction generated in the formation process of the separation area 200 can rapidly convey the pipeline and the plasma in the air inlet 111 into the separation area 200.
It should be noted that the second driving plate 625 is also penetratingly connected with the operating rod 3 through a second engagement hole 6250 having a regular hexagonal cross section, and the size of the second engagement hole 6250 is adapted to the size of the operating rod 3. Meanwhile, the gas has a certain compressibility, that is, when the first end of the third one-way valve 73 is not opened in the initial stage of triggering the second energy storage mechanism 62, the piston rod 612 can still compress the volume of the gas above the cylinder 611 to move, so that the insulating gas is pressurized. Therefore, the specific value of the rotation angle α can be determined according to the required degree of pressurization of the insulating gas.
In another aspect, the present application provides a method for operating a high voltage arc switch, where a preferred embodiment includes the following specific switching-off procedure:
s100: when the switching-off signal is received, the ion generating device is started for T time to generate enough plasma.
S200: the operating mechanism is then activated to actuate the moving contact 22 and the airflow driving mechanism 6.
S300: the distance X between the separation area 200 between the movable contact 22 and the fixed contact 21 is equal to or greater than a set threshold value X 0 When the ion generating device is closed; wherein the threshold value X 0 The value of (2) is less than or equal to arc height H.
It should be noted that when the switch is closed, the air inlet 111 and the corresponding pipeline are filled with insulating gas, so that before the switch is opened, the air inlet 111 and the insulating gas in the pipeline need to be exhausted and filled with plasma, so as to ensure that the plasma can enter the separation area 200 at the moment of switching off. Therefore, before the switch cabinet receives the switch-off signal, the ion generator 500 can be controlled to start to generate plasma and be led into the pipeline until the pipeline and the air inlet 111 are full of plasma, and the time required for the process is T.
The specific value of the time T can be obtained according to experimental simulation; for ease of understanding, the experimental procedure may be briefly described. The first one-way valve 71 with the same specification is selected for experiment, the same type of ionizer 500 is communicated with the pipeline of the first one-way valve 71, and the mounting holes of the first one-way valve 71 and the third one-way valve 73 are plugged; then, a sensor for detecting the ion concentration is installed at the end of the first check valve 71 for connecting with the air intake hole 111. Finally, the ion generator 500 is opened until the sensor detects that the plasma concentration in the pipeline reaches the standard, and the time from the opening of the ion generator 500 to the standard of the concentration is recorded as time T. Since the flow of the plasma in this embodiment may generate insulating gas to cause a decrease in concentration, the concentration standard of the plasma can be improved when experiments are performed.
It will also be appreciated that the plasma needs to be exhausted during the second phase of the opening operation, so the ionizer 500 needs to be turned off before the second phase of the opening operation is performed. The determination as to when the ionizer 500 is turned off can be made according to the size of the pitch of the separation region 200; that is, the distance between the separation areas 200 does not reach the arc generating height H, but the air inlet 111 and the remaining plasma in the pipeline can meet the filling requirement when the separation areas 200 reach the arc generating height under the driving of the insulating gas, and the ionizer 500 can be turned off at this time. Of course, if the space between the pipeline and the air inlet 111 is sufficient, that is, the volume of the pipeline and the air inlet 111 is equal to or larger than the volume of the separation area 200 reaching the arc height, the ionizer 500 can be closed while the operating mechanism is started; that is, the ionizer 500 closes the piping and the air intake hole 111 immediately after being filled with plasma; at this time threshold X 0 The value of (2) is 0.
The foregoing has outlined the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the present application is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of protection sought herein is as set forth in the claims below and the equivalents thereof.
Claims (10)
1. The high-voltage arc switch is characterized by comprising a mounting frame, wherein an arc extinguishing chamber is arranged on the mounting frame; still including install in the mounting bracket:
a contact assembly; the fixed contact seal of the contact assembly is fixedly arranged in the arc extinguishing chamber, and the movable contact seal of the contact assembly is slidably arranged in the arc extinguishing chamber; the movable contact and the fixed contact are suitable for forming a separation area when the brake is separated;
an ion generating device; the ion generating device is used for generating plasma;
an air flow driving mechanism; the airflow driving mechanism is suitable for driving the insulating gas to firstly lead the plasma into the separation area in the opening process, and then discharging the plasma out of the separation area; and
an operating mechanism; the operating mechanism is suitable for driving the moving contact and the airflow driving mechanism to act.
2. The high voltage arc switch of claim 1 wherein: the side part of the arc extinguishing chamber is respectively provided with an air inlet hole and an air outlet hole which are communicated with the outside;
the air inlet is opposite to the closing area of the movable contact and the fixed contact; the air outlet holes are spaced from the air inlet holes along the opening direction, and the spacing distance is the set arc height; the brake separating process comprises a first stage and a second stage; wherein the method comprises the steps of
The first stage: the distance between the moving contact and the separation area from the opening of the gate is equal to the arc height; in the process, the air flow driving mechanism is suitable for leading the plasma into the separation area through the air inlet hole by insulating gas, and the air outlet hole is always in a closed state;
and a second stage: the distance between the separation areas is larger than the arc generating height; in this process, the gas flow driving mechanism is adapted to introduce an insulating gas into the separation region so that the plasma located in the separation region is exhausted along the gas outlet holes.
3. The high voltage arc switch of claim 2 wherein: the air inlet is communicated with the outside through a pipeline for connecting the ion generating device and the air flow driving mechanism;
the outer sides of the moving contact and the fixed contact are respectively provided with an insulating part, and the moving contact and the fixed contact are respectively in sealing fit with the arc extinguishing chamber through the insulating parts; so that the ion generating device is adapted to fill the conduit and the inlet holes with plasma before the first stage is performed.
4. The high voltage arc switch of claim 3 wherein: the air inlet hole is provided with a first one-way valve outside, and the air outlet hole is provided with a second one-way valve outside;
The ion generating device and the air flow driving mechanism are communicated with the air inlet through the pipeline of the first one-way valve;
in a second stage of opening, the plasma in the separation region is adapted to be discharged along the second one-way valve;
when the corresponding reverse switch-on of the second stage is carried out, the insulating gas in the separation area is suitable for being discharged along the second one-way valve and/or the first one-way valve;
and when the corresponding reverse switching-on of the first stage is carried out, the insulating gas of the separation area is suitable for being discharged along the first one-way valve.
5. The high voltage arc switch of any of claims 2-4 wherein the operating mechanism comprises:
a driving device; the driving device is fixedly installed;
an operation lever; the operating rod is rotatably arranged on the mounting frame and is connected with the output end of the driving device; and
a first energy storage mechanism; the first energy storage mechanism is arranged on the mounting frame, and the moving contact is connected with the operating rod through the first energy storage mechanism;
the driving end of the air flow driving mechanism is also connected with the operating rod, so that the operating rod drives the moving contact and the air flow driving mechanism to act simultaneously under the driving of the driving device.
6. The high voltage arc switch of claim 5 wherein: the driving end of the first energy storage mechanism is matched with the operating rod through a hysteresis structure, so that in the process of rotating the operating rod, the first energy storage mechanism triggers and drives the air flow driving mechanism to lag behind, and then before a first stage, the insulating gas for driving the plasma is pressurized.
7. The high voltage arc switch of claim 6 wherein: the driving end of the first energy storage mechanism is provided with a first engagement hole with a regular polygon cross section; the operating rod penetrates through the first engagement hole, and the section of the operating rod is also in a regular polygon; the circumscribed circle corresponding to the section of the operating rod is concentric with the circumscribed circle corresponding to the section of the first engagement hole;
the diameter of the circumscribed circle corresponding to the section of the operating rod is smaller than the diameter of the circumscribed circle corresponding to the section of the first occlusion hole, and is larger than the diameter of the inscribed circle corresponding to the section of the first occlusion hole, so that the hysteresis structure is formed between the operating rod and the first occlusion hole.
8. The high voltage arc switch of claim 5 wherein: the air flow driving mechanism comprises an air cylinder assembly and a second energy storage mechanism; the ventilation end of the air cylinder assembly is communicated with the air inlet hole through a third one-way valve, and the driving end of the air cylinder assembly is connected with the operating rod through the second energy storage mechanism; the first energy storage mechanism and the second energy storage mechanism each comprise:
A support base; the supporting seat is fixed on the mounting frame;
an upper hinge plate; the upper end of the upper hinge plate is hinged to the supporting seat;
a lower hinge plate; the lower end of the lower hinged plate is hinged to a piece to be driven;
a traction plate; the lower end of the upper hinge plate, the upper end of the lower hinge plate and the first end of the traction plate are hinged together;
a driving plate; the driving plate is connected to the operating rod and hinged with the other end of the traction plate; and
a spring; the spring is sleeved on the piece to be driven and is respectively connected with the supporting seat and the piece to be driven through two ends;
when the spring is in a closed state, the upper hinge plate and the lower hinge plate are at parallel dead point positions, and the spring is in a deformed energy storage state;
when the brake is separated, the upper hinge plate and the lower hinge plate are driven to be separated from dead points through rotation of the operating rod, and then the piece to be driven is driven to move through elasticity of the spring.
9. The high voltage arc switch of claim 1 wherein: the insulating gas is dry air or insulating inert gas; the insulating gas is supplied to the gas flow driving mechanism through a gas flow source.
10. A method of operating a high voltage arc switch as claimed in any one of claims 1 to 9 wherein: the method comprises the following specific brake separating process:
s100: when receiving the switching-off signal, the ion generating device starts for T time to generate enough plasma;
s200: then starting the operating mechanism to drive the moving contact and the airflow driving mechanism to act;
s300: the separation area distance X between the moving contact and the fixed contact is more than or equal to a set threshold value X 0 When the ion generating device is closed; wherein the threshold value X 0 The value of (2) is less than or equal to arc height H.
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| CN202410038067.8A CN117558579B (en) | 2024-01-11 | 2024-01-11 | High-voltage arc switch and working method thereof |
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| CN202410038067.8A CN117558579B (en) | 2024-01-11 | 2024-01-11 | High-voltage arc switch and working method thereof |
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Also Published As
| Publication number | Publication date |
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| CN117558579B (en) | 2024-03-22 |
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