CN114420480B - High-voltage switch equipment with isolation fracture and moving contact assembly thereof - Google Patents
High-voltage switch equipment with isolation fracture and moving contact assembly thereof Download PDFInfo
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- CN114420480B CN114420480B CN202210010772.8A CN202210010772A CN114420480B CN 114420480 B CN114420480 B CN 114420480B CN 202210010772 A CN202210010772 A CN 202210010772A CN 114420480 B CN114420480 B CN 114420480B
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- 238000002955 isolation Methods 0.000 title claims abstract description 44
- 230000003068 static effect Effects 0.000 claims abstract description 35
- 238000010891 electric arc Methods 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 7
- 230000000149 penetrating effect Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 20
- 238000013461 design Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H2009/348—Provisions for recirculation of arcing gasses to improve the arc extinguishing, e.g. move the arc quicker into the arcing chamber
Abstract
The invention relates to a high-voltage switch device with an isolation fracture and a moving contact assembly thereof. The moving contact assembly of the high-voltage switch equipment with the isolation fracture comprises a moving support with a guide hole, a moving contact is assembled in the guide hole in a guiding way, a jack for inserting a static arc contact of the static end assembly is arranged on the moving contact, a piston cavity communicated with the jack is arranged on the moving contact at the rear of the jack, or the moving contact is provided with the piston cavity and a lateral channel communicated with the piston cavity, the lateral channel forms an air flow inlet and outlet for facing an electric arc between a static main contact of the static end assembly and the moving contact on the outer peripheral surface of the moving contact, and a piston is arranged in the piston cavity; the piston is fixedly provided with a piston rod, and one end of the piston rod, which is far away from the piston, penetrates out of the movable contact and is fixedly arranged on the movable support or the shell of the isolating switch, and the piston rod is used for enabling the volume of the piston cavity to change when the movable contact performs opening and closing actions.
Description
Technical Field
The invention relates to the technical field of isolating switches, in particular to high-voltage switch equipment with an isolating fracture and a moving contact assembly thereof.
Background
The high-voltage switch equipment with the isolation fracture comprises an isolation switch and an isolation grounding switch, and is an important component element in a high-voltage switch system. The isolating switch generally comprises a shell, a moving contact assembly arranged in the shell and a static end assembly arranged at the front end of the moving contact assembly, wherein the moving contact assembly comprises a moving end support with a guide hole, the moving contact is assembled in the guide hole in a guide sliding manner, and different moving contact driving modes are provided in the prior art. For example, a rack is installed on a moving contact of the isolating switch, and a rotating gear is meshed with the rack to drive the moving contact, so that switching on or switching off of the isolating switch is realized. In addition, the isolating switch can also adopt a connecting rod structure to push and pull the moving contact so as to realize the closing or opening of the isolating switch. For example, a combination of a high-voltage ac disconnecting switch and a grounding switch is disclosed in chinese literature with application publication number CN102426965a, an operating mechanism for the disconnecting switch is connected to a ball screw through an insulating connecting rod, a central shaft of the ball screw and the insulating connecting rod rotate together, and a shaft sleeve of the ball screw pushes a moving contact of the disconnecting switch fixed on the shaft sleeve of the ball screw to move axially, so as to realize opening or closing operation.
The extra-high voltage transmission has wide application prospect in China, the transmission capacity of a line can be greatly improved by using the series compensation device, an extra-high voltage series compensation device is arranged in an extra-high voltage alternating current test demonstration expansion project which is put into operation by a national power grid company, and a bypass isolating switch is adopted as important equipment for series compensation switching. The bypass isolating switch is operated to realize the conversion of serial compensation between a bypass state and a standby state, the extra-high voltage serial compensation bypass isolating switch requires that the switching capacity of bus switching current is improved to 6300A and the switching voltage is 7000V, which leads to longer arcing time and aggravated burning condition in the switching process, and the highest parameter of the switching capacity of the bus switching current of the conventional isolating switch is 1600A and the switching voltage is 400V according to the current domestic and foreign standards, so that the aim of arc extinguishing is fulfilled by the conventional isolating switch by means of elongating an arc until the arc is extinguished, the arc extinguishing capacity is insufficient, the switching capacity of the bus switching current with high parameters is not provided, and the use requirement of the extra-high voltage bypass isolating switch cannot be met at all.
Meanwhile, in IEC 62271-102:2018, new regulations are made on switching current parameters of the bus switching buses of the isolating switches for GIS, higher requirements are put forward on switching capacity of the buses, and the switching capacity of the buses of the conventional isolating switches does not have switching capacity of switching current of buses with high parameters.
Disclosure of Invention
The invention aims to provide a moving contact assembly of high-voltage switch equipment with an isolation fracture, which solves the technical problems that a conventional isolating switch in the prior art is insufficient in arc extinguishing capability and does not have high-parameter bus switching current opening and closing capability. The invention aims to provide a high-voltage switch device with an isolation fracture.
In order to achieve the above purpose, the technical scheme of the moving contact assembly of the high-voltage switch equipment with the isolation fracture is as follows:
the movable contact assembly of the isolating switch comprises a movable support with a guide hole, a movable contact is assembled in the guide hole in a guiding way, a jack into which a static arc contact of the static end assembly is inserted is arranged on the movable contact, a piston cavity communicated with the jack is arranged on the movable contact at the rear of the jack, or the movable contact is provided with the piston cavity and a lateral channel communicated with the piston cavity, the lateral channel forms an air flow inlet and outlet for facing an electric arc between a static main contact of the static end assembly and the movable contact on the outer peripheral surface of the movable contact, and a piston is arranged in the piston cavity; the piston is fixedly provided with a piston rod, one end of the piston rod, which is far away from the piston, penetrates out of the movable contact and is fixed on the movable support or the shell of the isolating switch, and the piston rod is used for changing the volume of the piston cavity when the movable contact is switched on and off, so that the opening of the jack or the opening of the jack and the air inlet and outlet are positioned at the opening of the movable contact to form suction air flow when the movable contact is switched on, and form exhaust air flow when the movable contact is switched off, so that arc blowing is realized by means of the suction air flow and the exhaust air flow.
The beneficial effects are that: in the moving contact assembly of the isolating switch, a piston is arranged in a piston cavity of a moving contact, a piston rod fixed on the piston penetrates out of the moving contact and is fixed on a moving support or a shell, when the moving contact is closed, the moving contact moves forwards, the piston rod moves backwards relative to the moving contact, the front end of the piston cavity is pumped into a low-pressure area by the piston rod, gas burnt by an electric arc near the moving contact and a static arc contact is sucked into the low-pressure area, and the sucked gas can be supplemented by fresh cooled gas to promote the electric arc to be extinguished rapidly; when the movable contact is switched off, the movable contact moves backwards, the piston rod moves forwards relative to the movable contact, the piston rod compresses fresh cooled gas in the front end of the piston cavity, and the gas blows to an electric arc between the movable contact and the static end assembly through the jack opening or the jack opening and the air flow inlet and outlet, so that the electric arc is extinguished rapidly. Therefore, the arc extinguishing capability of the isolating switch in the process of switching the bus to switch the current is greatly improved, and the problem that the conventional isolating switch cannot be switched on or off to switch the high-parameter bus to switch the current is effectively solved. In addition, the movable contact assembly of the isolating switch is highly fused with the basic structure of the isolating switch, wherein the piston is highly fused with the movable contact, the piston cavity is highly fused with the movable support, the whole structure is simple, the number of parts is less, and the cost is lower.
The rear end of the movable support is further improved, the shielding cover is arranged at the rear end of the movable support, the piston rod is provided with an axial section which is fixed on the piston and extends along the axial direction of the movable contact, the piston rod is also provided with a radial section which is fixed on the axial section and extends along the radial direction of the movable contact, the outer peripheral surface of the movable contact is provided with an avoidance groove, the radial section extends out of the avoidance groove and is fixed on the shielding cover, and the avoidance groove is used for avoiding the piston rod when the movable contact is switched on and off.
The beneficial effects are that: by means of the design, the piston rod is fixed on the shielding cover through the radial section, the length of the piston rod is reduced, and the stability of the piston rod is improved.
Further improved, the piston rod is L-shaped, and the avoiding groove and the piston cavity penetrate through the rear end face of the moving contact backwards, so that the piston and the piston rod can be installed forwards from the rear direction of the moving contact.
The beneficial effects are that: by the design, the piston rod can be directly arranged in the moving contact from the rear of the moving contact, and the installation is convenient.
Further improved, the shielding cover and the movable support are of an integrated structure.
The beneficial effects are that: the design is favorable to guaranteeing the intensity of shield cover and movable support, reduces the assembly process, reduces installation cost.
Further improved, a piston cavity on the movable contact is penetrated through the movable contact backwards, a piston rod is a straight rod, and the piston rod penetrates out of the piston cavity backwards and is used for being fixed on a grounding assembly behind the movable contact assembly or a shell of the isolating switch.
The beneficial effects are that: the piston rod is simple in structure and convenient to process and install.
Further improved, the part of the piston rod penetrating out of the piston cavity backwards is an insulating rod section, and the insulating rod section is used for being fixed to a grounding assembly behind the moving contact assembly.
The beneficial effects are that: by the design, the insulation performance of the arc extinguishing structure is guaranteed, and the safety of the isolating switch is improved.
Further improved, the rest section of the piston rod is a metal rod, and the front end of the insulating rod extends into the movable support.
The beneficial effects are that: by the design, the strength of the piston rod is enhanced while the insulation performance of the piston rod is ensured.
The movable contact is further improved, a screw connecting seat for screw thread transmission connection is arranged at the rear end of the movable contact and used for driving the movable contact to move back and forth when a screw penetrating into a shell of the isolating switch rotates, and the screw stretches into a piston cavity of the movable contact and is used as a piston rod to be connected with a piston, so that the piston is fixed along the front-back direction.
The beneficial effects are that: by the design, the screw nut structure can drive the moving contact to move along the front-back direction, so that the isolating switch with the arc extinguishing mechanism can adapt to the transmission form of the screw nut.
Further improved, the rear end of the movable support is provided with a screw rotating shaft seat for the screw to rotate, and the screw rotating shaft seat is provided with a screw through hole which is communicated with the guide hole and the inner cavity of the shell.
The beneficial effects are that: the design avoids the situation that the screw rod is bent due to overlong, and is beneficial to ensuring the stability of the screw rod.
In order to achieve the above purpose, the technical scheme of the high-voltage switch device with the isolation fracture of the invention is as follows:
the high-voltage switch equipment with the isolation fracture comprises a shell, wherein a moving contact assembly of the high-voltage switch equipment with the isolation fracture is arranged in the shell, a static end assembly is arranged in front of the moving direction of the moving contact assembly, the moving contact assembly of the high-voltage switch equipment with the isolation fracture comprises a moving support with a guide hole, a moving contact is assembled in the guide hole in a guiding way, a jack into which a static arc contact of the static end assembly is inserted is arranged on the moving contact, a piston cavity communicated with the jack is arranged on the moving contact at the rear of the jack, or the moving contact is provided with the piston cavity and a lateral channel communicated with the piston cavity, an air flow inlet and an air flow outlet for electric arc between a static main contact facing the static end assembly and the moving contact are formed on the outer peripheral surface of the moving contact, and a piston is arranged in the piston cavity; the piston is fixedly provided with a piston rod, one end of the piston rod, which is far away from the piston, penetrates out of the movable contact and is fixed on the movable support or the shell of the isolating switch, and the piston rod is used for changing the volume of the piston cavity when the movable contact is switched on and off, so that the opening of the jack or the opening of the jack and the air inlet and outlet are positioned at the opening of the movable contact to form suction air flow when the movable contact is switched on, and form exhaust air flow when the movable contact is switched off, so that arc blowing is realized by means of the suction air flow and the exhaust air flow.
The beneficial effects are that: in the high-voltage switch equipment with the isolation fracture, the piston is arranged in the piston cavity of the moving contact, the piston rod fixed on the piston penetrates out of the moving contact and is fixed on the moving support or the shell, when the moving contact is switched on, the moving contact moves forwards, the piston rod moves backwards relative to the moving contact, the front end of the piston cavity is pumped into a low-pressure area by the piston rod, the gas burnt by an electric arc near the moving contact and the static arc contact is sucked into the low-pressure area, and the sucked gas can be supplemented by fresh cooled gas to promote the electric arc to be extinguished rapidly; when the movable contact is switched off, the movable contact moves backwards, the piston rod moves forwards relative to the movable contact, the piston rod compresses fresh cooled gas in the front end of the piston cavity, and the gas blows to an electric arc between the movable contact and the static end assembly through the jack opening or the jack opening and the air flow inlet and outlet, so that the electric arc is extinguished rapidly. Therefore, the arc extinguishing capability of the isolating switch in the process of switching the bus to switch the current is greatly improved, and the problem that the conventional isolating switch cannot switch on or off the high-parameter bus to switch the current is effectively solved. In addition, the high-voltage switch equipment with the isolation fracture is highly integrated with the basic structure of the isolation switch, wherein the piston is highly integrated with the movable contact, the piston cavity is highly integrated with the movable support, the whole structure is simple, the number of parts is less, and the cost is lower.
The rear end of the movable support is further improved, the shielding cover is arranged at the rear end of the movable support, the piston rod is provided with an axial section which is fixed on the piston and extends along the axial direction of the movable contact, the piston rod is also provided with a radial section which is fixed on the axial section and extends along the radial direction of the movable contact, the outer peripheral surface of the movable contact is provided with an avoidance groove, the radial section extends out of the avoidance groove and is fixed on the shielding cover, and the avoidance groove is used for avoiding the piston rod when the movable contact is switched on and off.
The beneficial effects are that: by means of the design, the piston rod is fixed on the shielding cover through the radial section, the length of the piston rod is reduced, and the stability of the piston rod is improved.
Further improved, the piston rod is L-shaped, and the avoiding groove and the piston cavity penetrate through the rear end face of the moving contact backwards, so that the piston and the piston rod can be installed forwards from the rear direction of the moving contact.
The beneficial effects are that: by the design, the piston rod can be directly arranged in the moving contact from the rear of the moving contact, and the installation is convenient.
Further improved, the shielding cover and the movable support are of an integrated structure.
The beneficial effects are that: the design is favorable to guaranteeing the intensity of shield cover and movable support, reduces the assembly process, reduces installation cost.
Further improved, a piston cavity on the movable contact is penetrated through the movable contact backwards, a piston rod is a straight rod, and the piston rod penetrates out of the piston cavity backwards and is used for being fixed on a grounding assembly behind the movable contact assembly or a shell of the isolating switch.
The beneficial effects are that: the piston rod is simple in structure and convenient to process and install.
Further improved, the part of the piston rod penetrating out of the piston cavity backwards is an insulating rod section, and the insulating rod section is used for being fixed to a grounding assembly behind the moving contact assembly.
The beneficial effects are that: by the design, the insulation performance of the arc extinguishing structure is guaranteed, and the safety of the isolating switch is improved.
Further improved, the rest section of the piston rod is a metal rod, and the front end of the insulating rod extends into the movable support.
The beneficial effects are that: by the design, the strength of the piston rod is enhanced while the insulation performance of the piston rod is ensured.
The movable contact is further improved, a screw connecting seat for screw thread transmission connection is arranged at the rear end of the movable contact and used for driving the movable contact to move back and forth when a screw penetrating into a shell of the isolating switch rotates, and the screw stretches into a piston cavity of the movable contact and is used as a piston rod to be connected with a piston, so that the piston is fixed along the front-back direction.
The beneficial effects are that: by the design, the screw nut structure can drive the moving contact to move along the front-back direction, so that the isolating switch with the arc extinguishing mechanism can adapt to the transmission form of the screw nut.
Further improved, the rear end of the movable support is provided with a screw rotating shaft seat for the screw to rotate, and the screw rotating shaft seat is provided with a screw through hole which is communicated with the guide hole and the inner cavity of the shell.
The beneficial effects are that: the design avoids the situation that the screw rod is bent due to overlong, and is beneficial to ensuring the stability of the screw rod.
Drawings
Fig. 1 is a schematic structural view of a moving contact in an intermediate position in embodiment 1 of a high voltage switchgear with isolation break according to the present invention;
FIG. 2 is a schematic diagram of the moving contact in FIG. 1 in an isolated open position;
FIG. 3 is a schematic view of the moving contact in FIG. 1 in a grounded open position;
FIG. 4 is a schematic structural view of embodiment 2 of the high-voltage switchgear with isolation break of the present invention
Fig. 5 is a schematic structural view of embodiment 8 of the high-voltage switching apparatus with isolation break of the present invention;
fig. 6 is a partial structural schematic diagram of embodiment 9 of the high-voltage switching device with isolation break of the present invention;
in the figure: 11. a housing; 12. a moving contact assembly; 13. a stationary end assembly; 14. a grounding assembly; 15. a moving contact; 16. a shield; 17. a piston rod; 18. a radial segment; 19. an avoidance groove; 20. a movable support; 21. a piston chamber; 22. a gear; 23. a rack; 24. an insulating rod section; 25. a mounting base; 26. a piston; 27. a screw rod rotating shaft seat; 28. a screw rod; 29. a support base; 30. a screw rod connecting seat; 31. a stationary main contact; 32. static arc contacts; 33. lateral channels.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like is not excluded from a process, method, or the like that includes the element.
In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
The present invention is described in further detail below with reference to examples.
Embodiment 1 of the high voltage switchgear with isolated break of the present invention:
in this embodiment, as shown in fig. 1 to 3, the high-voltage switch device with an isolation fracture is a three-station isolation switch, and the three-station isolation switch is used as a bypass isolation switch for extra-high voltage serial compensation, as shown in fig. 1, the high-voltage switch device with an isolation fracture comprises a shell 11, a moving contact component 12 is arranged in the shell 11, a static end component 13 is arranged in front of the moving contact component 12 in the moving direction, a grounding component 14 is arranged behind the moving contact component 12 in the moving direction, and the isolation grounding switch has three working positions, namely a middle position, an isolation closing position and a grounding closing position.
In this embodiment, as shown in fig. 1, which is a schematic structural diagram of the movable contact 15 in the middle position, the movable contact assembly 12 includes a movable support 20 with a guide hole and a piston rod 17, a coaxial shielding cover 16 is disposed at the rear end of the movable support 20, and the movable support 20 and the shielding cover 16 are formed as an integral structure. The moving contact 15 is provided with a jack into which the static arc contact 32 of the static end assembly 13 is inserted, and the moving contact 15 is provided with a piston cavity 21 which is communicated with the jack at the rear of the jack. The piston cavity 21 is internally provided with a piston 26, the piston 26 is fixed on the piston rod 17, the piston rod 17 is L-shaped, the piston rod 17 comprises an axial section and a radial section 18, one end of the axial section, which is far away from the piston 26, penetrates out of the moving contact 15, the outer circumferential surface of the moving contact 15 is provided with an avoidance groove 19, the radial section 18 radially extends out of the avoidance groove 19 and is fixed on the shielding cover 16, and the avoidance groove 19 is used for avoiding the piston rod 17 during opening and closing actions of the moving contact 15. The escape groove 19 and the piston chamber 21 penetrate the rear end surface of the movable contact 15 rearward, and the piston 26 and the piston rod 17 are fitted forward from the rear of the movable contact 15, so that the piston 26 and the piston rod 17 can be mounted easily.
In this embodiment, as shown in fig. 1, a transmission mechanism in the isolating switch for driving the moving contact 15 to move back and forth includes a gear 22 and a rack 23 meshed with the gear 22, a groove extending back and forth for installing the rack 23 is provided on the outer peripheral surface of the moving contact 15, the rotating gear 22 is meshed with the rack 23 to drive the moving contact 15 to reciprocate in the back and forth direction, when the moving contact 15 moves forward until it cooperates with the stationary end assembly 13, the moving contact 15 reaches an isolating switch-on position, and at this time, the isolating switch can switch on the busbar switching current. When the moving contact 15 moves backwards until the moving contact is matched with the grounding assembly 14, the moving contact 15 reaches an isolation brake-separating position, and at the moment, the isolating switch can switch off the bus for converting current.
In this embodiment, as shown in fig. 2, when the moving contact 15 is in the closing position, the moving contact 15 moves forward in the guide hole, the fixed piston 26 moves backward relative to the moving contact 15 to pump the piston chamber 21 at the front end of the piston 26 into a low pressure area, the gas burned by the electric arc near the moving contact 15 and the static end assembly 14 is sucked into the low pressure area to form a suction gas flow at the opening of the jack, and then the freshly cooled gas supplements the sucked gas near the moving contact 15 and the static end assembly 14 to promote the electric arc to be extinguished rapidly.
In this embodiment, as shown in fig. 3, when the moving contact 15 is in the grounding switch-on position, the moving contact 15 moves backward, the fixed piston 26 moves forward relative to the moving contact 15 to compress the piston chamber 21 at the front end of the piston 26, so that the freshly cooled gas in the piston chamber 21 blows to the arc between the moving contact 15 and the stationary end assembly 13 through the jack opening to form an exhaust gas flow, and the arc between the moving contact 15 and the stationary end assembly 13 is extinguished rapidly.
When the three-station isolating switch closes the bus to switch current, the rotating gear 22 drives the moving contact 15 to move forwards to an isolating closing position, the piston cavity 21 at the front end is pumped into a low-pressure area, gas burnt by an electric arc near the moving contact 15 and the static end assembly 13 is sucked into the low-pressure area, and then the freshly cooled gas can supplement the sucked gas near the moving contact 15 and the static end assembly 13 to promote the electric arc to be extinguished quickly.
When the three-station isolating switch breaks the bus to switch current, the rotating gear 22 drives the moving contact 15 to move backwards to the grounding switch-on position, the piston 26 compresses the piston cavity 21 at the front end, and fresh cooled gas in the piston cavity 21 blows to an electric arc between the moving contact 15 and the static end assembly 13, so that the electric arc is extinguished rapidly.
In the high-voltage switch equipment with the isolation fracture, the piston is arranged in the piston cavity of the moving contact, the piston rod fixed on the piston penetrates out of the moving contact and is fixed on the moving support or the shell, when the moving contact is switched on, the moving contact moves forwards, the piston moves backwards relative to the moving contact, the front end of the piston cavity is pumped into a low-pressure area by the piston, the gas burnt by an electric arc near the moving contact and the static arc contact is sucked into the low-pressure area, and the sucked gas can be supplemented by fresh cooled gas to promote the electric arc to be extinguished rapidly; when the movable contact is opened, the movable contact moves backwards, the piston moves forwards relative to the movable contact, the piston compresses fresh cooled gas in the front end of the piston cavity, and the gas blows to an electric arc between the movable contact and the static end assembly through the jack opening or the jack opening and the air flow inlet and outlet, so that the electric arc is extinguished rapidly. Therefore, the arc extinguishing capability of the isolating switch in the process of switching the bus to switch the current is greatly improved, and the problem that the conventional isolating switch cannot be switched on or off to switch the high-parameter bus to switch the current is effectively solved. In addition, the high-voltage switch equipment with the isolation fracture is highly integrated with the basic structure of the isolation switch, wherein the piston is highly integrated with the movable contact, the piston cavity is highly integrated with the movable support, the whole structure is simple, the number of parts is less, and the cost is lower.
Embodiment 2 of the high-voltage switching device with isolated break of the present invention:
this embodiment differs from embodiment 1 in that: as shown in fig. 4, the piston rod 17 is a straight rod, the rear end of the piston rod 17 is fixed on the grounding assembly 14, the piston rod 17 comprises an insulating rod section 24, the rest of the piston rod 17 is a metal section, the insulating rod section 24 is provided with a mounting seat 25, the insulating rod section 24 is fixed on the grounding assembly 14 through the mounting seat 25, and the front end of the insulating rod section 24 extends into the movable support 20.
Embodiment 3 of the high voltage switchgear with isolated break of the present invention:
this embodiment differs from embodiment 1 in that: in this embodiment, the high-voltage switchgear having the isolation break is an isolation switch for a GIS, and the structure of the moving contact assembly is the same as that of the moving contact assembly of the high-voltage switchgear having the isolation break in embodiment 1. In other embodiments, the high voltage switchgear with isolation break is an isolated ground switch having two sets of operating mechanisms for operating the isolated and ground structural portions, respectively.
Embodiment 4 of the high voltage switchgear with isolated break of the present invention:
this embodiment differs from embodiment 1 in that: in this embodiment, the piston rod includes an axial section and two radial sections, the extending directions of the two radial sections are different, and the piston rod is fixed on the shielding case through the two radial sections.
Example 5 of the high-voltage switchgear with isolated break of the present invention:
this embodiment differs from embodiment 1 in that: in this embodiment, the shield and the movable support are welded together.
Example 6 of the high-voltage switchgear with isolated break of the present invention:
this embodiment differs from embodiment 1 in that: in this embodiment, the insulating rod section is welded and fixed to the housing behind the moving contact assembly.
Embodiment 7 of the high-voltage switching device with isolated break of the present invention:
this embodiment differs from embodiment 1 in that: in this embodiment, the piston rods are all insulating rods.
Embodiment 8 of the high-voltage switching device with isolated break of the present invention:
this embodiment differs from embodiment 1 in that: in this embodiment, as shown in fig. 5, the transmission mechanism for driving the moving contact to move in the isolating switch includes a screw rod 28 and a screw rod connecting seat 30 fixed at the rear end of the moving contact 15 and in threaded transmission fit with the screw rod 28, the rear end of the moving support 20 is provided with a screw rod rotating seat 27 for the screw rod 28 to rotate, through holes penetrating from front to back are formed in the screw rod connecting seat 30 and the screw rod rotating seat 27, the screw rod 28 sequentially penetrates through the housing 11 and the screw rod 28 rotating seat in the front-back direction and then stretches into the piston cavity 21 of the moving contact 15, and is connected with the piston 26 as a piston rod 17, so that the piston 26 is fixed in the front-back direction.
Example 9 of the high-voltage switchgear with isolated break of the present invention:
the difference between this embodiment and embodiment 1 is that: in embodiment 1, the moving contact 15 is provided with a jack in plug-in fit with the static arc contact 32 on the static end assembly 13, and the moving contact 15 is provided with a piston cavity 21 penetrating through the jack at the rear of the jack. In this embodiment, as shown in fig. 6, based on the moving contact having the jack and the piston cavity 21, the moving contact 15 is further provided with a lateral channel 33 communicating with the piston cavity 21, the lateral channel 33 forms an air flow inlet and outlet for electric arc between the moving contact 15 and the stationary main contact 31 of the stationary end assembly 13 on the outer peripheral surface of the moving contact 15, when the moving contact 15 is closed, a suction air flow is formed at the openings of the jack and the air flow inlet and outlet, and when the moving contact 15 is opened, an exhaust air flow is formed at the openings of the jack and the air flow inlet and outlet.
Embodiments of the invention of a moving contact assembly for a high voltage switchgear with isolated breaks: the structure of the moving contact assembly of the high voltage switchgear with an isolated break is the same as the structure of the moving contact assembly of any one of claims 1 to 9 of the above-mentioned high voltage switchgear with an isolated break, and will not be described in detail here.
It should be noted that the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, but may be modified without inventive effort or equivalent substitution of some technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The moving contact assembly of the high-voltage switch equipment with the isolation fracture comprises a moving support (20) with a guide hole, a moving contact (15) is assembled in the guide hole in a guiding way, a jack for inserting a static arc contact (32) of a static end assembly (13) is arranged on the moving contact (15), and the moving contact assembly is characterized in that a piston cavity (21) communicated with the jack is arranged behind the jack on the moving contact (15), or the moving contact (15) is provided with the piston cavity (21) and a lateral channel (33) communicated with the piston cavity (21), the lateral channel (33) forms an air flow inlet and outlet for electric arc between the static main contact facing the static end assembly (13) and the moving contact on the outer peripheral surface of the moving contact (15), and a piston (26) is arranged in the piston cavity (21); the piston (26) is fixedly provided with a piston rod (17), one end, far away from the piston (26), of the piston rod (17) is used for penetrating out of the movable contact (15) and being fixed on the movable support (20) or the shell (11) of the isolating switch, and is used for enabling the volume of the piston cavity (21) to change during opening and closing actions of the movable contact (15), so that suction airflow is formed at the opening of the jack or at the opening of the jack and the airflow inlet and outlet when the movable contact (15) is closed, and exhaust airflow is formed during opening of the movable contact (15), so that arc blowing is carried out by means of the suction airflow and the exhaust airflow.
2. The moving contact assembly of the high-voltage switch equipment with the isolation fracture according to claim 1, characterized in that a shielding cover (16) is arranged at the rear end of the moving support (20), a piston rod (17) is provided with an axial section which is fixed on a piston (26) and extends along the axial direction of the moving contact (15), a radial section (18) which is fixed on the axial section and extends along the radial direction of the moving contact (15) is further provided with an avoidance groove (19) on the outer circumferential surface of the moving contact (15), the radial section (18) extends out of the avoidance groove (19) and is fixed on the shielding cover (16), and the avoidance groove (19) is used for avoiding the piston rod (17) during opening and closing actions of the moving contact (15).
3. The moving contact assembly of the high-voltage switch equipment with the isolation fracture according to claim 2, wherein the piston rod (17) is L-shaped, and the avoidance groove (19) and the piston cavity (21) penetrate through the rear end face of the moving contact (15) backwards, so that the piston (26) and the piston rod (17) can be installed in front of the rear direction of the moving contact (15).
4. The movable contact assembly of a high voltage switchgear with isolated break according to claim 2, characterized in that the shield (16) and the movable support (20) are of unitary construction.
5. The moving contact assembly of a high voltage switchgear with isolation break according to claim 1, characterized in that the piston cavity is penetrating the moving contact (15) backwards, the piston rod (17) is a straight rod, the piston rod (17) is penetrating the piston cavity (21) backwards for fixing to the grounding assembly (14) behind the moving contact assembly (12) or to the housing (11) of the isolation switch.
6. The moving contact assembly of a high voltage switchgear with isolated break according to claim 5, characterized in that the part of the piston rod (17) that passes back out of the piston chamber (21) is an insulating rod section (24), the insulating rod section (24) being intended to be fixed to a grounding assembly (14) behind the moving contact assembly (12).
7. The moving contact assembly of a high voltage switchgear with isolated break according to claim 6, characterized in that the remaining section of the piston rod (17) is a metal rod, the insulating rod section (24) extending into the moving support (20).
8. The moving contact assembly of the high-voltage switch equipment with the isolation fracture according to claim 1, wherein a screw connecting seat (30) for screw thread transmission connection of a screw rod (28) is arranged at the rear end of the moving contact (15) and is used for driving the moving contact (15) to move back and forth when the screw rod (28) penetrating into a shell (11) of the isolation switch rotates, the screw rod (28) stretches into a piston cavity (21) of the moving contact (15) and is connected with a piston (26) as a piston rod (17), and the piston (26) is fixed along the front-back direction.
9. The movable contact assembly of the high-voltage switch equipment with the isolation fracture according to claim 8, wherein a screw rotating shaft seat (27) for rotating a screw (28) is arranged at the rear end of the movable support (20), and a screw through hole penetrating front and back is arranged on the screw rotating shaft seat (27) so as to be communicated with the guide hole and the inner cavity of the shell (11).
10. High-voltage switchgear with isolating break, comprising a housing (11), a moving contact assembly (12) being arranged in the housing (11), a stationary end assembly (13) being arranged in front of the moving direction of the moving contact assembly (12), characterized in that the moving contact assembly (12) is a moving contact assembly of a high-voltage switchgear with isolating break according to any of the preceding claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210010772.8A CN114420480B (en) | 2022-01-06 | 2022-01-06 | High-voltage switch equipment with isolation fracture and moving contact assembly thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210010772.8A CN114420480B (en) | 2022-01-06 | 2022-01-06 | High-voltage switch equipment with isolation fracture and moving contact assembly thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN114420480A CN114420480A (en) | 2022-04-29 |
| CN114420480B true CN114420480B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210010772.8A Active CN114420480B (en) | 2022-01-06 | 2022-01-06 | High-voltage switch equipment with isolation fracture and moving contact assembly thereof |
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| CN1086044A (en) * | 1993-07-05 | 1994-04-27 | 杨军 | High pressure, superhigh pressure self energy arc blow-out circuit breaker |
| EP0785562A1 (en) * | 1996-01-22 | 1997-07-23 | Gec Alsthom T & D Sa | Circuit breaker having contacts with double movement |
| CN201514892U (en) * | 2009-09-14 | 2010-06-23 | 中国西电电气股份有限公司 | Quick grounding switch device |
| EP2387057A1 (en) * | 2010-05-12 | 2011-11-16 | ABB Technology AG | Gas-isolated high voltage switch |
| WO2015043460A1 (en) * | 2013-09-24 | 2015-04-02 | 国家电网公司 | High-speed grounding switch and grounding switch assembly unit composed thereof |
| WO2016165733A1 (en) * | 2015-04-13 | 2016-10-20 | Abb Technology Ag | Device for interrupting non-short circuit currents only, in particular disconnector or earthing switch |
| CN111799128A (en) * | 2020-07-17 | 2020-10-20 | 西安西电开关电气有限公司 | Air cylinder system and high-capacity switch equipment thereof |
| CN213093122U (en) * | 2020-08-24 | 2021-04-30 | 平高集团有限公司 | Circuit breaker and gas insulated switchgear using same |
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2022
- 2022-01-06 CN CN202210010772.8A patent/CN114420480B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086044A (en) * | 1993-07-05 | 1994-04-27 | 杨军 | High pressure, superhigh pressure self energy arc blow-out circuit breaker |
| EP0785562A1 (en) * | 1996-01-22 | 1997-07-23 | Gec Alsthom T & D Sa | Circuit breaker having contacts with double movement |
| CN201514892U (en) * | 2009-09-14 | 2010-06-23 | 中国西电电气股份有限公司 | Quick grounding switch device |
| EP2387057A1 (en) * | 2010-05-12 | 2011-11-16 | ABB Technology AG | Gas-isolated high voltage switch |
| WO2015043460A1 (en) * | 2013-09-24 | 2015-04-02 | 国家电网公司 | High-speed grounding switch and grounding switch assembly unit composed thereof |
| WO2016165733A1 (en) * | 2015-04-13 | 2016-10-20 | Abb Technology Ag | Device for interrupting non-short circuit currents only, in particular disconnector or earthing switch |
| CN111799128A (en) * | 2020-07-17 | 2020-10-20 | 西安西电开关电气有限公司 | Air cylinder system and high-capacity switch equipment thereof |
| CN213093122U (en) * | 2020-08-24 | 2021-04-30 | 平高集团有限公司 | Circuit breaker and gas insulated switchgear using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114420480A (en) | 2022-04-29 |
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