CN114420480A - High-voltage switch equipment with isolation fracture and moving contact component thereof - Google Patents
High-voltage switch equipment with isolation fracture and moving contact component thereof Download PDFInfo
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- CN114420480A CN114420480A CN202210010772.8A CN202210010772A CN114420480A CN 114420480 A CN114420480 A CN 114420480A CN 202210010772 A CN202210010772 A CN 202210010772A CN 114420480 A CN114420480 A CN 114420480A
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- 238000002955 isolation Methods 0.000 title claims abstract description 30
- 230000003068 static effect Effects 0.000 claims abstract description 28
- 238000003780 insertion Methods 0.000 claims abstract description 15
- 230000037431 insertion Effects 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims 1
- 238000010891 electric arc Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 23
- 230000009286 beneficial effect Effects 0.000 description 17
- 238000013461 design Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000013589 supplement Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000112 cooling gas Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
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- 230000008033 biological extinction Effects 0.000 description 1
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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
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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
- 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 component thereof. The moving contact component 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 manner, an insertion hole into which a static arc contact of a static end component is inserted is arranged on the moving contact, a piston cavity communicated with the insertion hole is arranged behind the insertion hole on the moving contact, or the moving contact is provided with the piston cavity and a lateral channel communicated with the piston cavity, the lateral channel forms an airflow inlet and an airflow outlet facing an electric arc between a static main contact of the static end component and the moving contact on the peripheral surface of the moving contact, and a piston is arranged in the piston cavity; and a piston rod is fixed on the piston, and 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 a shell of the isolating switch, so that the volume of a piston cavity is changed when the movable contact is switched on and off.
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 component thereof.
Background
High-voltage switchgear with isolating break, including isolating switches and isolating grounding switches, is an important component in high-voltage switchgear systems. The isolating switch generally comprises a shell, a movable contact component arranged in the shell and a fixed end component arranged at the front end of the movable contact component, wherein the movable contact component comprises a movable end support with a guide hole, a movable contact is arranged in the guide hole in a guiding sliding mode, and different movable contact driving modes are arranged 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 closing or opening 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 switching-on or switching-off of the isolating switch. For example, in a combination of a high-voltage ac isolating switch and a grounding switch disclosed in chinese document with application publication No. CN102426965A, an operating mechanism for the isolating 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 isolating switch fixed on the shaft sleeve of the ball screw to move along an axial direction, thereby implementing an opening or closing operation.
The ultra-high voltage transmission has wide application prospect in China, the transmission capacity of a line can be greatly improved by applying the series compensation device, the ultra-high voltage series compensation device is arranged in the ultra-high voltage alternating current test demonstration extension project which is already put into operation by the national power grid company, and the bypass isolating switch is used as important equipment for putting on and off the series compensation. By operating the bypass isolating switch, the conversion of series compensation between a bypass state and a standby state can be realized, the switching capacity of bus conversion current required by the bypass isolating switch for extra-high voltage series compensation is improved to 6300A and converted voltage 7000V, the arcing time is longer in the switching process, the burning condition is aggravated, according to the current standards at home and abroad, the highest parameter of the switching capacity of the bus conversion current of the conventional isolating switch is 1600A, the conversion voltage is 400V, the conventional isolating switch achieves the aim of arc extinguishing by means of a method of prolonging the arc until the arc is extinguished, the arc extinguishing capacity is insufficient, the switching capacity of the bus conversion current with high parameter 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, a new specification is made for the switching bus switching current parameter of the GIS disconnecting switch, a higher requirement is provided for the bus switching current switching capacity of the GIS disconnecting switch, and the bus switching current switching capacity of the conventional disconnecting switch does not have the capacity of switching the high-parameter bus switching current.
Disclosure of Invention
The invention aims to provide a moving contact component of high-voltage switch equipment with an isolation fracture, which aims to solve the technical problems that the conventional isolating switch in the prior art is insufficient in arc extinguishing capability and does not have high-parameter bus switching current switching capability. The object of the invention is to provide a high-voltage switchgear assembly having an isolating break.
In order to achieve the purpose, the technical scheme of the movable contact component of the high-voltage switch equipment with the isolation fracture is as follows:
the moving contact component of the isolating switch comprises a moving support with a guide hole, a moving contact is assembled in the guide hole in a guiding mode, an insertion hole into which a static arc contact of a static end component is inserted is formed in the moving contact, a piston cavity communicated with the insertion hole is formed in the moving contact behind the insertion hole, or the moving contact is provided with the piston cavity and a lateral channel communicated with the piston cavity, the lateral channel forms an airflow inlet and an airflow outlet facing an electric arc between a static main contact of the static end component and the moving contact on the peripheral surface of the moving contact, and a piston is arranged in the piston cavity; the piston is fixed 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 a 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 is opened and closed, further enabling the opening of the jack or the openings of the jack and the airflow inlet and outlet to form suction airflow when the movable contact is closed and exhaust airflow when the movable contact is opened, so as to blow an arc by means of the suction airflow and the exhaust airflow.
The beneficial effects are that: in the moving contact component 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 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, gas burnt by electric arcs near the moving contact and a static arc contact is sucked into the low-pressure area, and the gas which is freshly cooled can supplement the sucked gas, so that the electric arcs are rapidly extinguished; when the moving contact is opened, the moving contact moves backwards, the piston rod moves forwards relative to the moving 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 moving contact and the static end component through the jack opening or the jack opening and the airflow inlet and outlet, so that the electric arc is quickly extinguished. Therefore, the arc extinguishing capability of the isolating switch in the process of switching the bus to convert the current is greatly improved, and the difficult problem that the conventional isolating switch cannot be switched on or off and the high-parameter bus converts the current is effectively solved. In addition, the moving 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 moving contact, and the piston cavity is highly fused with the moving support, so that the isolating switch is simple in integral structure, less in number of parts and lower in cost.
The improved structure is characterized in that a 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, a radial section which is fixed on the axial section and extends along the radial direction of the movable contact is also arranged, an avoiding groove is arranged on the peripheral surface of the movable contact, the radial section extends out of the avoiding groove and is fixed on the shielding cover, and the avoiding groove is used for avoiding the piston rod when the movable contact is switched on and off.
The beneficial effects are that: design like this, the piston rod passes through radial section to be fixed on the shield cover, reduces the length of piston rod, improves the stability of piston rod.
The piston rod is L-shaped, so that the groove and the piston cavity penetrate through the rear end face of the movable contact backwards, and the piston rod driven contact are installed forwards in the rear direction.
The beneficial effects are that: by the design, the piston rod can be directly installed in the moving contact from the rear of the moving contact, so that 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 for ensuring the strength of the shielding cover and the movable support, reduces the assembly procedures and reduces the installation cost.
The improved structure is characterized in that a piston cavity on the moving contact penetrates through the moving contact backwards, the piston rod is a straight rod, and the piston rod penetrates out of the piston cavity backwards and is used for being fixed to a grounding component behind the moving contact component or a shell of the isolating switch.
The beneficial effects are that: by the design, the piston rod is simple in structure and convenient to process and install.
In a further improvement, the part of the piston rod which penetrates out of the piston cavity backwards is an insulating rod section, and the insulating rod section is used for being fixed on a grounding component behind the movable contact component.
The beneficial effects are that: design like this, guarantee arc extinguishing structure's insulating properties, improve isolator's security.
The further improvement is that the rest sections of the piston rod are metal rods, and the front end of the insulating rod extends into the movable support.
The beneficial effects are that: design like this, when guaranteeing piston rod insulating properties, strengthen the intensity of piston rod.
The improved structure is characterized in that a screw rod connecting seat for screw rod thread transmission connection is arranged at the rear end of the movable contact, the screw rod connecting seat is used for driving the movable contact to move back and forth when a screw rod penetrating into a shell of the isolating switch rotates, and the screw rod extends into a piston cavity of the movable contact and is connected with the piston as a piston rod, so that the piston is fixed along the front and back direction.
The beneficial effects are that: by the design, the moving contact can be driven by the screw nut structure to move along the front-back direction, so that the isolating switch with the arc extinguishing mechanism can adapt to the screw nut transmission form.
The improved structure is characterized in that a screw rotating shaft seat for rotating the screw is arranged at the rear end of the movable support, and a screw through hole which is through from front to back is formed in the screw rotating shaft seat so as to communicate the guide hole with the inner cavity of the shell.
The beneficial effects are that: due to the design, the situation that the lead screw is bent due to overlong length is avoided, and the stability of the lead screw is ensured.
In order to achieve the purpose, the technical scheme of the high-voltage switch equipment with the isolation fracture is as follows:
the high-voltage switch equipment with the isolation fracture comprises a shell, wherein a moving contact component of the high-voltage switch equipment with the isolation fracture is arranged in the shell, a static end component is arranged in front of the moving direction of the moving contact component, the moving contact component 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 mode, a jack into which a static arc contact of the static end component is inserted is arranged on the moving contact, a piston cavity communicated with the jack is arranged behind the jack on the moving contact, or the moving contact is provided with the piston cavity and a lateral channel communicated with the piston cavity, the lateral channel forms an airflow inlet and outlet for an arc between a static main contact facing the static end component and the moving contact on the peripheral surface of the moving contact, and a piston is arranged in the piston cavity; the piston is fixed 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 a 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 is opened and closed, further enabling the opening of the jack or the openings of the jack and the airflow inlet and outlet to form suction airflow when the movable contact is closed and exhaust airflow when the movable contact is opened, so as to blow an arc by means of the suction airflow and the exhaust airflow.
Has the advantages that: in the high-voltage switch equipment with the isolated fracture, a piston is arranged in a piston cavity of the moving contact, a 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 piston rod draws the front end of the piston cavity into a low-pressure area, gas burnt by electric arcs near the moving contact and the static arc contact is sucked into the low-pressure area, and the fresh cooled gas can supplement the sucked gas to promote the electric arcs to be quickly extinguished; when the moving contact is opened, the moving contact moves backwards, the piston rod moves forwards relative to the moving 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 moving contact and the static end component through the jack opening or the jack opening and the airflow inlet and outlet, so that the electric arc is quickly extinguished. Therefore, the arc extinguishing capability of the isolating switch in the process of switching the bus to convert the current is greatly improved, and the difficult problem that the conventional isolating switch cannot be switched on or off and the high-parameter bus converts the current is effectively solved. In addition, the high-voltage switch equipment with the isolation fracture is highly fused with the basic structure of the isolation switch, wherein the piston is highly fused with the movable contact, the piston cavity is highly fused with the movable support, the overall structure is simple, the number of parts is small, and the cost is low.
The improved structure is characterized in that a 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, a radial section which is fixed on the axial section and extends along the radial direction of the movable contact is also arranged, an avoiding groove is arranged on the peripheral surface of the movable contact, the radial section extends out of the avoiding groove and is fixed on the shielding cover, and the avoiding groove is used for avoiding the piston rod when the movable contact is switched on and off.
The beneficial effects are that: design like this, the piston rod passes through radial section to be fixed on the shield cover, reduces the length of piston rod, improves the stability of piston rod.
The piston rod is L-shaped, so that the groove and the piston cavity penetrate through the rear end face of the movable contact backwards, and the piston rod driven contact are installed forwards in the rear direction.
The beneficial effects are that: by the design, the piston rod can be directly installed in the moving contact from the rear of the moving contact, so that 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 for ensuring the strength of the shielding cover and the movable support, reduces the assembly procedures and reduces the installation cost.
The improved structure is characterized in that a piston cavity on the moving contact penetrates through the moving contact backwards, the piston rod is a straight rod, and the piston rod penetrates out of the piston cavity backwards and is used for being fixed to a grounding component behind the moving contact component or a shell of the isolating switch.
The beneficial effects are that: by the design, the piston rod is simple in structure and convenient to process and install.
In a further improvement, the part of the piston rod which penetrates out of the piston cavity backwards is an insulating rod section, and the insulating rod section is used for being fixed on a grounding component behind the movable contact component.
The beneficial effects are that: design like this, guarantee arc extinguishing structure's insulating properties, improve isolator's security.
The further improvement is that the rest sections of the piston rod are metal rods, and the front end of the insulating rod extends into the movable support.
The beneficial effects are that: design like this, when guaranteeing piston rod insulating properties, strengthen the intensity of piston rod.
The improved structure is characterized in that a screw rod connecting seat for screw rod thread transmission connection is arranged at the rear end of the movable contact, the screw rod connecting seat is used for driving the movable contact to move back and forth when a screw rod penetrating into a shell of the isolating switch rotates, and the screw rod extends into a piston cavity of the movable contact and is connected with the piston as a piston rod, so that the piston is fixed along the front and back direction.
The beneficial effects are that: by the design, the moving contact can be driven by the screw nut structure to move along the front-back direction, so that the isolating switch with the arc extinguishing mechanism can adapt to the screw nut transmission form.
The improved structure is characterized in that a screw rotating shaft seat for rotating the screw is arranged at the rear end of the movable support, and a screw through hole which is through from front to back is formed in the screw rotating shaft seat so as to communicate the guide hole with the inner cavity of the shell.
The beneficial effects are that: due to the design, the situation that the lead screw is bent due to overlong length is avoided, and the stability of the lead screw is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a movable contact in a middle position in an embodiment 1 of a high-voltage switchgear with an isolation break according to the present invention;
fig. 2 is a schematic structural view of the movable contact in fig. 1 in a position of isolation from opening;
fig. 3 is a schematic structural diagram of the movable contact in fig. 1 in a grounding opening position;
FIG. 4 is a schematic structural diagram of embodiment 2 of the high-voltage switchgear with isolating break according to the present invention
Fig. 5 is a schematic structural view of an embodiment 8 of the high-voltage switchgear with isolated break according to the present invention;
fig. 6 is a partial schematic structural view of embodiment 9 of the high voltage switchgear with isolated breaks of the present invention;
in the figure: 11. a housing; 12. a moving contact assembly; 13. a stationary end assembly; 14. a ground component; 15. a moving contact; 16. a shield case; 17. a piston rod; 18. a radial segment; 19. an avoidance groove; 20. a movable support; 21. a piston cavity; 22. a gear; 23. a rack; 24. an insulating rod section; 25. a mounting seat; 26. a piston; 27. a lead screw rotating shaft seat; 28. a lead screw; 29. a supporting seat; 30. a screw rod connecting seat; 31. a stationary main contact; 32. a stationary arc contact; 33. a lateral channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of 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 present invention, 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 derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, which may be present, 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. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, 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, elements recited by the phrases "comprising an … …," or the like, do not exclude the presence of such elements, processes, or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Example 1 of a high-voltage switchgear having an isolating break according to the invention:
in this embodiment, as shown in fig. 1 to 3, the high voltage switch apparatus with an isolation break according to the present invention is a three-position isolation switch, and the three-position isolation switch is used as a bypass isolation switch for extra-high voltage series compensation, as shown in fig. 1, the high voltage switch apparatus with an isolation break includes a housing 11, a moving contact assembly 12 is disposed in the housing 11, a stationary end assembly 13 is disposed in front of the moving direction of the moving contact assembly 12, a grounding assembly 14 is disposed behind the moving direction of the moving contact assembly 12, and the isolation grounding switch has three working positions, which are a middle position, an isolation switching-on position, and a grounding switching-off 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 having 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 an integrated structure. The moving contact 15 is provided with an insertion hole for inserting the static arc contact 32 of the static end component 13, and the moving contact 15 is provided with a piston cavity 21 communicated with the insertion hole at the rear part of the insertion hole. The piston 26 is arranged in the piston cavity 21, the piston 26 is fixed on the piston rod 17, the piston rod 17 is of an L shape, the piston rod 17 comprises an axial section and a radial section 18, one end, far away from the piston 26, of the axial section penetrates out of the driven contact 15, an avoiding groove 19 is formed in the peripheral surface of the movable contact 15, the radial section 18 radially extends out of the avoiding groove 19 and is fixed on the shielding cover 16, and the avoiding groove 19 is used for avoiding the piston rod 17 when the movable contact 15 is opened and closed. Furthermore, the relief groove 19 and the piston cavity 21 penetrate through the rear end surface of the movable contact 15 backwards, and the piston 26 and the piston rod 17 are inserted forwards from the rear of the movable contact 15, so that the piston 26 and the piston rod 17 are convenient to mount.
In this embodiment, as shown in fig. 1, the transmission mechanism for driving the movable contact 15 to move back and forth in the isolating switch includes a gear 22 and a rack 23 engaged with the gear 22, a groove extending back and forth and used for mounting the rack 23 is formed in the outer peripheral surface of the movable contact 15, the gear 22 is engaged with the rack 23 to drive the movable contact 15 to reciprocate back and forth, and when the movable contact 15 moves forward until it is matched with the fixed end component 13, the movable contact 15 reaches an isolating switch-on position, and at this time, the isolating switch can switch on a bus to convert current. When the movable contact 15 moves backwards until it cooperates with the grounding assembly 14, the movable contact 15 reaches the isolation tripping position, at which time the disconnector can switch the busbar current on and off.
In this embodiment, as shown in fig. 2, when the movable contact 15 is in the isolation switching-on position, the movable contact 15 moves forward in the guide hole, the stationary piston 26 moves backward relative to the movable contact 15 to draw the piston cavity 21 at the front end of the piston 26 into a low-pressure region, the gas burned by the arc near the movable contact 15 and the stationary end assembly 14 is sucked into the low-pressure region to form a suction gas flow at the opening of the jack, and then the freshly cooled gas supplements the gas sucked away near the movable contact 15 and the stationary end assembly 14 to promote the rapid extinction of the arc.
In this embodiment, as shown in fig. 3, when the movable contact 15 is in the ground switching-on position, the movable contact 15 moves backward, the stationary piston 26 moves forward relative to the moving movable contact 15 to compress the piston cavity 21 at the front end of the piston 26, so that the fresh cooling gas in the piston cavity 21 is blown to the arc between the movable contact 15 and the stationary end component 13 through the jack opening to form an exhaust gas flow, and the arc between the movable contact 15 and the stationary end component 13 is rapidly extinguished.
When the three-station isolating switch closes the bus to convert current, the rotating gear 22 drives the movable contact 15 to move forward to an isolating and closing position, the piston cavity 21 at the front end is pumped into a low-pressure area, gas burnt by electric arcs near the movable contact 15 and the static end assembly 13 is sucked into the low-pressure area, and then the fresh cooled gas can supplement the gas sucked near the movable contact 15 and the static end assembly 13, so that the electric arcs are rapidly extinguished.
When the three-station isolating switch is switched on and off to convert current, the rotating gear 22 drives the movable contact 15 to move backwards to the grounding switching-on position, the piston 26 compresses the piston cavity 21 at the front end, and fresh cooling gas in the piston cavity 21 blows to electric arcs between the movable contact 15 and the static end component 13, so that the electric arcs are rapidly extinguished.
In the high-voltage switch equipment with the isolated fracture, a piston is arranged in a piston cavity of the moving contact, a 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 piston draws the front end of the piston cavity into a low-pressure area, gas burnt by electric arcs near the moving contact and the static arc contact is sucked into the low-pressure area, and the fresh cooled gas can supplement the sucked gas to promote the electric arcs to be quickly extinguished; when the moving contact is opened, the moving contact moves backwards, the piston moves forwards relative to the moving 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 moving contact and the static end component through the jack opening or the jack opening and the airflow inlet and outlet, so that the electric arc is quickly extinguished. Therefore, the arc extinguishing capability of the isolating switch in the process of switching the bus to convert the current is greatly improved, and the difficult problem that the conventional isolating switch cannot be switched on or off and the high-parameter bus converts the current is effectively solved. In addition, the high-voltage switch equipment with the isolation fracture is highly fused with the basic structure of the isolation switch, wherein the piston is highly fused with the movable contact, the piston cavity is highly fused with the movable support, the overall structure is simple, the number of parts is small, and the cost is low.
Embodiment 2 of the high-voltage switchgear with isolating break according to the invention:
this example differs from example 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 includes a section of insulating rod section 24, the remaining portion of the piston rod 17 is a metal section, the insulating rod section 24 has 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.
Example 3 of the high-voltage switchgear with isolating break according to the invention:
this example differs from example 1 in that: in this embodiment, the high-voltage switch device having the isolation break is an isolation switch for the GIS, and the structure of the moving contact assembly is the same as that of the moving contact assembly of the high-voltage switch device having the isolation break in embodiment 1. In other embodiments, the high voltage switchgear having an isolating break is an isolating grounding switch having two sets of actuators for operating the isolating structural section and the grounding structural section, respectively.
Example 4 of the high-voltage switchgear with isolating break according to the invention:
this example differs from example 1 in that: in this embodiment, the piston rod includes axial section and two radial sections, and the extending direction of two radial sections is different, and the piston rod passes through two radial sections to be fixed on the shield cover.
Example 5 of a high-voltage switchgear apparatus according to the invention with isolating break:
this example differs from example 1 in that: in this embodiment, the shield and the movable support are welded and fixed together.
Example 6 of the high-voltage switchgear with isolating break according to the invention:
this example differs from example 1 in that: in this embodiment, the insulating rod section is welded and fixed to the housing behind the moving contact assembly.
Example 7 of a high-voltage switchgear apparatus according to the invention with isolating break:
this example differs from example 1 in that: in this embodiment, the piston rods are all insulating rods.
Embodiment 8 of the high-voltage switchgear with isolating break according to the invention:
this example differs from example 1 in that: in this embodiment, as shown in fig. 5, the transmission mechanism for driving the movable contact to move in the isolating switch includes a lead screw 28 and a lead screw connecting seat 30 fixed at the rear end of the movable contact 15 and in threaded transmission fit with the lead screw 28, a lead screw rotating seat 27 for rotating the lead screw 28 is provided at the rear end of the movable support 20, through holes penetrating from front to back are formed in the lead screw connecting seat 30 and the lead screw rotating seat 27, the lead screw 28 sequentially passes through the housing 11 and the lead screw 28 rotating seat along the front-back direction and then extends into the piston cavity 21 of the movable contact 15, and the lead screw 28 is connected with the piston 26 as a piston rod 17, so that the piston 26 is fixed along the front-back direction.
Example 9 of a high-voltage switchgear apparatus according to the invention with isolating break:
this example differs from example 1 in that: in embodiment 1, the movable contact 15 is provided with a jack which is in plug-in fit with the fixed arc contact 32 on the fixed end component 13, and the movable contact 15 is provided with a piston cavity 21 which is communicated with the jack and is arranged behind the jack. In this embodiment, as shown in fig. 6, based on the movable contact being provided with the insertion hole and the piston cavity 21, the movable contact 15 is further provided with a lateral channel 33 communicated with the piston cavity 21, the lateral channel 33 forms an airflow inlet and outlet for directing an arc between the stationary main contact 31 of the stationary end component 13 and the movable contact 15 on the outer peripheral surface of the movable contact 15, when the movable contact 15 is switched on, a suction airflow is formed at the opening of the insertion hole and the airflow inlet and outlet, and when the movable contact 15 is switched off, an exhaust airflow is formed at the opening of the insertion hole and the airflow inlet and outlet.
The invention relates to an embodiment of a moving contact component of a high-voltage switch device with an isolation fracture, which comprises the following steps: the structure of the movable contact assembly of the high-voltage switch apparatus with the isolating fracture is the same as that of the movable contact assembly of any one of claims 1 to 9 of the above high-voltage switch apparatus with the isolating fracture, and is not described in detail herein.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A moving contact component of high-voltage switch equipment with an isolation fracture comprises a moving support (20) with a guide hole, a moving contact (15) is assembled in the guide hole in a guiding mode, an insertion hole for inserting a static arc contact (32) of a static end component (13) is formed in the moving contact (15), and the moving contact component is characterized in that a piston cavity (21) communicated with the insertion hole is formed in the rear of the insertion hole 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 airflow inlet and outlet for electric arcs between a static main contact facing the static end component (13) and the moving contact on the peripheral surface of the moving contact (15), and a piston (26) is arranged in the piston cavity (21); a piston rod (17) is fixed on the piston (26), one end, far away from the piston (26), of the piston rod (17) penetrates out of the driven contact (15) and is fixed on the movable support (20) or a shell (11) of the isolating switch, and the piston rod is used for enabling the volume of the piston cavity (21) to change when the movable contact (15) is opened and closed, further enabling the opening of the jack or the openings of the jack and the airflow inlet and outlet to form suction airflow when the movable contact (15) is closed and exhaust airflow when the movable contact (15) is opened, and accordingly arc blowing is achieved by means of the suction airflow and the exhaust airflow.
2. The movable contact assembly of a high-voltage switch device with an isolated fracture as claimed in claim 1, wherein the movable support (20) is provided at a rear end thereof with a shielding case (16), the piston rod (17) has an axial section fixed to the piston (26) and extending in an axial direction of the movable contact (15), and further has a radial section (18) fixed to the axial section and extending in a radial direction of the movable contact (15), an avoiding groove (19) is provided on an outer peripheral surface of the movable contact (15), the radial section (18) extends from the avoiding groove (19) and is fixed to the shielding case (16), and the avoiding groove (19) is used for avoiding the piston rod (17) when the movable contact (15) is opened and closed.
3. The movable contact assembly of a high-voltage switch device with an isolating break as claimed in claim 2, wherein the piston rod (17) is L-shaped, and the evasion groove (19) and the piston cavity (21) penetrate through the rear end face of the movable contact (15) backwards, so that the piston (26) and the piston rod (17) are inserted into the driven contact (15) backwards and forwards.
4. A movable contact assembly of a high-voltage switchgear with isolating break according to claim 2, characterized in that said shield (16) and said movable support (20) are of a unitary structure.
5. The movable contact assembly of a high-voltage switch device with an isolated fracture as claimed in claim 1, wherein the piston cavity penetrates the movable contact (15) backwards, the piston rod (17) is a straight rod, and the piston rod (17) penetrates the piston cavity (21) backwards and is used for being fixed to the grounding assembly (14) behind the movable contact assembly (12) or the shell (11) of the isolating switch.
6. A movable contact assembly of a high-voltage switch gear with an isolating break as claimed in claim 5, characterized in that the part of the piston rod (17) which penetrates backwards out of the piston cavity (21) is an insulating rod section (24), and the insulating rod section (24) is used for being fixed on the grounding assembly (14) behind the movable contact assembly (12).
7. The movable contact assembly of a high-voltage switchgear with isolating break according to claim 6, characterized in that the remaining section of said piston rod (17) is a metal rod, and the insulating rod section (24) extends into the movable support (20).
8. The moving contact assembly of the high-voltage switch equipment with the isolated fracture as claimed in claim 1, wherein the rear end of the moving contact (15) is provided with a lead screw connecting seat (30) for the lead screw (28) to be in threaded transmission connection, the lead screw connecting seat is used for driving the moving contact (15) to move back and forth when the lead screw (28) penetrating into the shell (11) of the isolating switch rotates, and the lead screw (28) extends into the piston cavity (21) of the moving contact (15) and is connected with the piston (26) as the piston rod (17) so that the piston (26) is fixed in the back and forth direction.
9. The moving contact assembly of the high-voltage switch equipment with the isolated fracture as claimed in claim 8, wherein the rear end of the moving support (20) is provided with a screw rod rotating shaft seat (27) for rotating the screw rod (28), and the screw rod rotating shaft seat (27) is provided with a screw rod through hole which is through from front to back so as to communicate the guide hole and the inner cavity of the shell (11).
10. High-voltage switchgear with isolated break, comprising a housing (11), a movable contact assembly (12) arranged in the housing (11), a stationary terminal assembly (13) arranged in front of the movable contact assembly (12) in the direction of motion, characterized in that the movable contact assembly (12) is the movable contact assembly of the high-voltage switchgear with isolated break as claimed in any one of the preceding claims 1 to 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 true CN114420480A (en) | 2022-04-29 |
| CN114420480B 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
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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 |
|---|---|
| CN114420480B (en) | 2023-12-08 |
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