CN114783813A - Double-break isolating switch - Google Patents
Double-break isolating switch Download PDFInfo
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- CN114783813A CN114783813A CN202111592934.5A CN202111592934A CN114783813A CN 114783813 A CN114783813 A CN 114783813A CN 202111592934 A CN202111592934 A CN 202111592934A CN 114783813 A CN114783813 A CN 114783813A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 89
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- 230000009286 beneficial effect Effects 0.000 description 9
- 238000013461 design Methods 0.000 description 8
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- 230000000149 penetrating effect Effects 0.000 description 5
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- 238000000429 assembly Methods 0.000 description 4
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- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/50—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a double-break isolating switch, which comprises a shell, wherein a first static contact seat and a second static contact seat are relatively fixed in the shell, a movable contact seat is arranged between the first static contact seat and the second static contact seat, a first movable contact and a second movable contact are assembled on the movable contact seat in a guiding and sliding manner, a driving structure comprises a transmission shaft and an operating mechanism, the transmission shaft drives the first movable contact and the second movable contact to synchronously move to realize switching on and off through a transmission structure in the shell, the transmission structure in the shell comprises a main connecting lever, the transmission shaft is connected to the middle part of the main connecting lever in a rotation stopping manner, two groups of transmission components are respectively linked at two ends of the main connecting lever, each transmission component comprises a connecting rod, the middle part of the connecting rod is hinged with the end part of the main connecting lever, one end of the connecting rod is hinged with the movable contact, a guiding structure for guiding the other end of the connecting rod is arranged in the shell, and the guiding direction of the guiding structure is vertical to the guiding moving direction of the movable contact, the main crank arm can meet the moving requirement of the moving contact only by rotating less than one circle, and the response speed of the opening and closing can be improved.
Description
Technical Field
The invention belongs to the field of high-voltage alternating current and direct current power transmission and transformation, and particularly relates to a double-break isolating switch suitable for extension, overhaul and test without power failure of a bus.
Background
With the development of economic society and the improvement of the living standard of people, the requirements of the whole society on the power supply reliability are higher and higher, the tolerance on power failure events is lower and lower, the attention of government departments, electric power monitoring organizations and media networks on safety production is high, and the planning of power failure is more difficult. However, in order to reduce the capital construction and operation and maintenance cost, a large GIS power station is generally built in stages, most GIS power stations need to be expanded, the first-stage equipment part of a GIS product only reserves an expansion interface, and a bus is required to be powered off during expansion; meanwhile, when a certain interval breaks down during GIS operation, the interval needs to be independently overhauled, and bus power failure is also needed. The expansion power failure means that the construction progress of the project is delayed, manpower and material resources are wasted, and direct or indirect economic loss is caused.
At present, the main reasons that GIS cannot realize expansion, maintenance and test without power outage are as follows: in the extension structure design, only one isolation fracture is arranged between the standby interval and the operating bus. When the interval butt joint installation, in order to avoid keeping apart the fracture and discharging suddenly and puncturing and cause bodily injury, need to have a power failure to former operation generating line and handle.
During an alternating current withstand voltage test after interval extension and maintenance, if the test voltage cannot be kept in the same frequency and phase with the operating voltage, a working condition that the amplitude of the test voltage and the amplitude of the operating voltage are reversely superposed on the isolation fracture exists. In order to avoid the breakdown of the isolation fracture and endanger the operating equipment, the standards such as DL/T555, DL/T617 and DL/T618 stipulate that: when the GIS extension part is voltage-resistant, the original adjacent equipment is required to be powered off and grounded, otherwise, measures are required to be taken by considering the damage to the original part caused by sudden breakdown, and the currently adopted measures are to perform power failure treatment on the original running bus.
In order to avoid the problems caused by the need of power failure of a bus during extension, the prior art provides a concept of extension and maintenance without power failure, and currently, a plurality of technical schemes for extension and maintenance without power failure are realized, wherein the technical scheme for extension, maintenance and voltage withstanding test without power failure of a double-break isolating switch is a hotspot of current research, for example, a double-break isolating switch module disclosed by a patent document with the authorization publication number of CN206331958U comprises a shell and a driving structure for driving a movable contact, a fixed contact and a closing switch in the shell, wherein two movable contacts and two fixed contacts are respectively arranged to form double breaks, the two fixed contacts are respectively fixed on basin-type insulators at two axial ends of the shell, the two movable contacts are arranged in an inner cavity on a movable contact seat, one ends of the two movable contacts, which are far away from the fixed contacts, are respectively provided with axially arranged racks, the driving structure comprises a transmission gear, and the two movable contacts are respectively arranged at two radial sides of the transmission gear, the transmission gear drives the two moving contacts to act synchronously when rotating, so that the two fractures of the double-fracture isolating switch are simultaneously in a switching-on position or a switching-off position.
However, the double-break isolating switch adopts a gear and rack transmission structure, when the switch is switched on and off, the moving contact can move in place only by rotating the transmission gear for multiple circles, and the response speed is low, so that the quick switch-on and switch-off of the switch is not facilitated; meanwhile, the transmission form of the gear rack has the advantages of complex part manufacturing process and high cost.
Disclosure of Invention
The invention aims to provide a double-break isolating switch, which aims to solve the problems that the existing double-break isolating switch is low in switching-on and switching-off response speed and high in part manufacturing cost.
The technical scheme of the double-break isolating switch is as follows:
a double-break isolating switch comprises a shell, wherein a first static contact seat and a second static contact seat are relatively fixed in the shell, a movable contact seat is arranged between the first static contact seat and the second static contact seat, a first movable contact and a second movable contact are assembled on the movable contact seat in a guiding and sliding manner, the double-break isolating switch also comprises a driving structure, the driving structure comprises a transmission shaft extending into the shell and an operating mechanism which is positioned outside the shell and is in transmission connection with the transmission shaft, the transmission shaft is in transmission connection with the first movable contact and the second movable contact through a transmission structure in the shell and is used for driving the first movable contact and the second movable contact to synchronously act to realize switching-on and switching-off, the transmission structure in the shell comprises a main connecting lever, the transmission shaft is in rotation stopping connection with the middle of the main connecting lever, two ends of the main connecting lever are respectively linked with two groups of transmission components, the two groups of transmission components respectively drive the first movable contacts and the second movable contacts to act, the transmission components comprise connecting rods, and the middle of the connecting rods is hinged with the end parts of the main connecting lever, one end of the connecting rod is hinged with the corresponding moving contact, a guide structure used for guiding the other end of the connecting rod is further arranged in the shell, and the guide direction of the guide structure is perpendicular to the guide moving direction of the moving contact.
Has the advantages that: two ends of the main connecting lever are respectively hinged with the middle parts of the two connecting rods, one end of each connecting rod is hinged with the corresponding moving contact, and the other end of each connecting rod can slide through the corresponding guide structure, so that when the main connecting lever is driven to rotate by a transmission shaft of the driving structure, the main connecting lever simultaneously drives the two connecting rods to act, and the two moving contacts respectively move in opposite directions under the driving of the connecting rods and the guide matching of the two moving contacts on the moving contact bases, so that the two moving contacts can be contacted with the corresponding static contacts, and the simultaneous opening and closing of the double-break isolating switch can be realized; by adopting the main crank arm and the two connecting rods to simultaneously drive the two moving contacts to perform opposite-direction relative motion, compared with a transmission form of a gear rack, the main crank arm does not need to rotate for multiple circles, the moving requirement of the moving contacts can be met by the main crank arm rotating for less than one circle, the response speed of opening and closing can be improved, and the crank arm connecting rod type structure is easier to manufacture and is beneficial to reducing the cost; meanwhile, the guide structure is arranged at one end of the connecting rod, so that the movable contact can obtain higher moving speed by rotating the main connecting lever by the same angle under the condition that the length of the main connecting lever is the same as that of the connecting rod.
Furthermore, the guiding moving paths of the first moving contact and the second moving contact are parallel to each other and are spaced in the direction perpendicular to the moving paths.
Has the beneficial effects that: make the direction movement path of two moving contacts not coincide like this, the removal of two moving contacts can not have the interference to can make two moving contacts remove the state that makes the projection in the direction of perpendicular to movement path overlap mutually, thereby make the moving contact obtain bigger movement stroke, under the prerequisite of guaranteeing the opening distance, reduce shell body size as far as.
Furthermore, the main crank arm is arched, the transmission shaft is connected to the middle position of the arched main crank arm in a rotation stopping mode, the connecting rod is connected to the end portion of the arched main crank arm in a hinged mode, and when the moving contact moves to the position overlapped with the main crank arm in the axial projection direction of the transmission shaft, part of the moving contact is located in an arch inner space of the arched main crank arm.
Has the beneficial effects that: the main crank arm is arched, so that the hinging of the two connecting rods and the moving avoidance of the moving contact are met, the structure is simple, the manufacturing is convenient, and the structure of the transmission structure in the whole shell is compact, so that the compact design of a switch product is facilitated.
Further, the guide paths of the guide structures guiding the connecting rods of the two sets of transmission assemblies are collinear.
Has the beneficial effects that: the guide paths of the two guide structures are collinear, so that the space occupied by arranging the two guide structures can be reduced, and the compact design is facilitated.
Furthermore, the guide moving paths of the first moving contact and the second moving contact are collinear, and the guide paths of the guide structures for guiding the connecting rods of the two groups of transmission assemblies are collinear.
Has the advantages that: by adopting the collinear arrangement, the design of the whole insulation structure is facilitated, the cost is reduced, and meanwhile, the moving end structure of the whole double-break isolating switch is more compactly arranged in the direction perpendicular to the guide moving direction, so that the compact design of the double-break isolating switch is facilitated according to the requirement.
Furthermore, the guide structure comprises a guide sliding chute, a guide sliding pin is arranged on the connecting rod, and the guide sliding pin is slidably arranged in the guide sliding chute in a penetrating mode and can rotate around the axis of the guide sliding chute.
Has the beneficial effects that: the guide structure is simple and easy to manufacture by arranging the guide sliding pin at the end part of the connecting rod to form guide fit with the guide sliding groove.
Further, the connecting rod is rectangular plate-shaped, the fixed dress of wearing of face of direction sliding pin perpendicular to connecting rod is on the connecting rod, guide structure includes the guide post that extends on the direction of direction, sets up the cross recess of axial extension on the guide post, and the plate body part that is in direction sliding pin both sides at the both ends of direction sliding pin and connecting rod stretches into four notches of cross recess respectively.
Has the advantages that: through set up the cross recess on the guide post, can dodge the removal of rectangular platelike connecting rod on the one hand, on the other hand can make the both ends that run through the guide sliding pin of connecting rod both sides support respectively on the guide post, stable in structure, the action is reliable.
Furthermore, the guide columns of the two guide structures are respectively connected with a fixed flange at the back end, and the fixed flanges are fixedly connected to the movable contact base.
Has the beneficial effects that: the movable contact seat is integrated with a guide structure and a movable contact, so that the compact design can be facilitated.
Further, the guide post and the fixed flange are of an integral casting structure.
Has the advantages that: the electric field distribution of casing is favorable to guaranteeing in convenient preparation, the setting that reduces the connecting piece.
Further, the transmission shaft is an insulating transmission shaft.
Has the beneficial effects that: the transmission shaft is directly arranged as an insulating shaft, so that the insulating property is good and the structure is simple.
Drawings
Fig. 1 is a schematic structural diagram of a connection state of a transmission structure and a transmission shaft in a housing in embodiment 1 of a double-break disconnecting switch according to the present invention;
FIG. 2 is a top view of the additional actuator of FIG. 1;
fig. 3 is a schematic view of a movable contact in an intermediate state in embodiment 1 of the double break disconnecting switch of the present invention;
fig. 4 is a schematic view of a movable contact in an open state in embodiment 1 of the double break disconnecting switch of the present invention;
fig. 5 is a schematic diagram of a moving contact in a closing state in embodiment 1 of the double-break disconnecting switch of the present invention;
fig. 6 is a schematic view of a movable contact in an open state in embodiment 2 of the double-break disconnecting switch of the present invention;
fig. 7 is a schematic diagram of a double break disconnector in embodiment 2 of the present invention, in which a movable contact is in a closed state.
In the figure: 1. a transmission system; 2. a first fixed contact; 3. a second fixed contact; 4. a first moving contact; 5. a second moving contact; 10. an operating mechanism; 11. a second fixed flange; 12. a second guide post; 13. a second link; 14. a transmission support; 15. a drive shaft; 16. a main crank arm; 17. a first link; 18. a first fixed flange; 19. a first guide post; 191. a guide chute; 192. an avoidance groove; 111. a guide slide pin; 03. a second moving contact; 04. the first moving contact.
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 used herein in accordance with the embodiments of the present invention, 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, an element defined by the recitation of "comprising an … …" or the like that may occur does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
In the description of the invention, unless expressly stated or limited otherwise, the terms "mounted", "connected" and "connected" when used in this context are to be construed broadly, as for example they may be fixedly connected, releasably connected or integrally connected; 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, unless otherwise specifically stated or limited, 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 detachable or non-detachable. The specific meanings of the above-mentioned terms in the present invention can be understood by those skilled in the art through specific situations.
The present invention is described in further detail below with reference to examples.
the double-fracture isolating switch comprises a shell, a sealed air chamber is formed in the inner cavity of the shell, two supporting insulators which are oppositely arranged are arranged on the shell, static contact seats are arranged on the supporting insulators, the static contact seats on the two supporting insulators respectively form a first static contact seat and a second static contact seat, a first static contact 2 is arranged on the first static contact seat, a second static contact 3 is arranged on the second static contact seat, the first static contact 2 and the second static contact 3 are arranged in a staggered mode, and the central axes of the first static contact 2 and the second static contact 3 which are oppositely arranged are parallel; the shell is also provided with a movable contact base (not shown in the figure), the movable contact base is fixed in the air chamber through an insulating support, the movable contact base is positioned between a first static contact base and a second static contact base, a first movable contact 4 and a second movable contact 5 are assembled on the movable contact base in a guiding sliding mode, the first movable contact 4 is correspondingly contacted and conducted with a first static contact 2, the second movable contact 5 is correspondingly contacted and conducted with a second static contact 3, the two movable contacts and the two static contacts form a double-fracture structure, the double-fracture isolating switch further comprises a transmission system 1 used for realizing simultaneous opening and closing of the double-fracture structure, the transmission system 1 comprises a driving structure and a shell internal transmission structure, the movable contact base is a casting with an inner cavity, the shell internal transmission structure is positioned in the inner cavity and can move in the inner cavity, and the movable contact base surrounds the shell internal transmission structure to ensure the uniformity of an electric field.
As shown in fig. 1 and fig. 2, the driving structure includes an operating mechanism 10 located outside the housing and a transmission shaft 15 extending into the housing, the transmission shaft 15 is rotatably supported in the housing through a transmission support 14, the transmission shaft 15 is an insulation transmission shaft 15, the operating mechanism 10 is in transmission connection with one end of the transmission shaft 15, the other end of the transmission shaft 15 is in transmission connection with the driving structure in the housing, the driving structure in the housing includes a main crank arm 16 and two sets of driving components linked with the main crank arm 16, the driving components include a connecting rod, and the connecting rod is used for driving the moving contact to move. The two transmission components are respectively a first transmission component and a second transmission component.
The main connecting lever 16 is an arch, and is a plate-type connecting lever, the transmission shaft 15 is connected to the middle position of the arch main connecting lever 16 in a rotation stopping manner, the connecting rods and the transmission shaft 15 are respectively located at two sides of the main connecting lever 16, the transmission shaft 15 is connected to one side plate surface of the main connecting lever 16, which is opposite to the arch space, two end parts of the main connecting lever 16 are respectively connected with the connecting rods, one end of each connecting rod is connected with the first connecting rod 17 of the first transmission assembly, the other end of each connecting rod is connected with the second connecting rod 13 of the second transmission assembly, the middle part of the first connecting rod 17 and the middle part of the second connecting rod 13 are respectively connected with two end parts of the main connecting lever 16 through hinge pins.
One end of the first connecting rod 17 close to the rotating axis of the main crank arm 16 is connected with the first moving contact 4, the first moving contact 4 is of a moving contact rod structure, the first moving contact 4 is provided with a contact end used for being in contact with the first fixed contact 2 and a hinged end which is hinged with the first connecting rod 17 through a pin shaft, and when moving to the position overlapped with the main crank arm 16 in the axial projection direction of the transmission shaft 15, part of the moving contact is located in the arch space of the arch main crank arm 16, so that the structure of the transmission structure in the integral shell is compact, and the compact design of a switch product is facilitated. The cavity wall of the moving contact base is provided with a contact guiding hole (not shown in the figure), and the rod part of the first moving contact 4 is arranged in the contact guiding hole in a penetrating way so as to realize guiding movement.
One end of the first connecting rod 17 far away from the rotation axis of the main crank arm 16 is connected with a guide structure, and the guide direction of the guide structure is vertical to the guide moving direction of the movable contact. The guide structure comprises a first fixing flange 18 and a first guide post 19 integrally formed with the first fixing flange 18, the first fixing flange 18 is fixedly connected to the movable contact base, a cross groove extending axially is formed in the first guide post 19, the cross groove comprises a first transverse through groove penetrating through the first guide post 19 along the rotation axis direction of the main crank arm 16 and a first vertical through groove penetrating through the guide post along the rotation axis direction of the main crank arm 16, and the transverse through groove and the vertical channel are respectively provided with two side notches which are opposite to each other. The first connecting rod 17 is in a long strip plate shape, a through hole is formed in the end portion of the first connecting rod 17, the guide sliding pin 111 is fixedly arranged in the through hole of the connecting rod in a penetrating mode perpendicular to the plate surface of the first connecting rod 17, the transverse through groove of the guide column forms a guide sliding groove 191, the vertical through groove forms an avoiding groove 192, the first connecting rod 17 stretches into the avoiding groove 192, two ends of the guide sliding pin 111 stretch into the guide sliding grooves 191, and therefore the guide sliding pin 111 and plate body portions of the connecting rods located on two sides of the guide sliding pin 111 stretch into four notches of the cross groove respectively. When the main crank arm 16 drives the first link 17 to move, the guiding sliding pin 111 at one end of the first link 17, which extends into the cross groove, can slide in the guiding sliding groove 191 and rotate around the axis of the guiding sliding pin in the guiding sliding groove 191, and the avoidance groove 192 on the guiding column avoids the movement of the first link 17.
The connection structure of the second connecting rod 13 and the main connecting lever 16, the connection structure of the second connecting rod 13 and the second moving contact 5, and the matching form of the second connecting rod 13 and the guide structure connected with the second connecting rod are the same as the matching form of the first connecting rod 17 and the main connecting lever 16, the first connecting rod 17 and the first moving contact 4, and the matching form of the second connecting rod 13 and the guide structure connected with the second connecting rod 13, the structures of the second fixed flange 11 and the second guide column 12 are the same as the structures of the first fixed flange 18 and the second guide column 19, and the guide assembly mode of the second moving contact 5 on the moving contact base is the same as the guide assembly mode of the first moving contact 4.
As shown in fig. 3, 4, and 5, when the first movable contact 4 and the second movable contact 5 are in the intermediate state, the first connecting rod 17, the second connecting rod 13 and the main connecting lever 16 are projected and overlapped in the direction of the rotation axis of the main connecting lever 16, the first connecting rod 17 and the second connecting rod 13 are collinear, the first connecting rod 17 is perpendicular to the first movable contact 4, and the second connecting rod 13 is perpendicular to the second movable contact 5;
when the double-break isolating switch is switched off, the operating mechanism 10 outside the shell drives the transmission shaft 15 to rotate, the transmission shaft 15 drives the main connecting lever 16 to rotate, the main connecting lever 16 simultaneously drives the first connecting rod 17 and the second connecting rod 13 to move, the first connecting rod 17 drives the first movable contact 4 to move towards the direction far away from the first fixed contact 2, the second connecting rod 13 drives the second movable contact 5 to move towards the direction far away from the second fixed contact 3, and the two movable contacts respectively move towards opposite directions, so that the double-break isolating switch is switched off simultaneously.
First moving contact 4, the direction movement path of second moving contact 5 is parallel to each other, and at the interval on the direction of perpendicular to movement path, thereby make the direction movement path of two moving contacts not coincide, there can not be interference in the removal of two moving contacts, thereby can make two moving contacts move the state that makes the projection in the direction of perpendicular to movement path overlap mutually, thereby make the moving contact obtain bigger movement stroke, under the prerequisite of guaranteeing the opening distance, reduce shell body size as far as.
Meanwhile, when the connecting rod moves, the guide sliding pin 111 slides in the guide sliding groove 191 to guide and move one end of the connecting rod, and limits one end of the connecting rod, which is far away from the moving contact, so that the end of the connecting rod moves along a straight line, thereby being beneficial to improving the moving speed of the hinged end of the connecting rod and the moving contact. And the guide paths of the two guide structures for guiding the two connecting rods are collinear, so that the compact design of the double-fracture isolating switch is facilitated.
When the double-break isolating switch is switched on, the transmission shaft 15 is driven to rotate by the operating mechanism 10 outside the shell, the transmission shaft 15 drives the main connecting lever 16 to rotate, the main connecting lever 16 simultaneously drives the first connecting rod 17 and the second connecting rod 13 to move, the first connecting rod 17 drives the first movable contact 4 to move towards the direction close to the first fixed contact 2, the second connecting rod 13 drives the second movable contact 5 to move towards the direction close to the second fixed contact 3, and the two movable contacts respectively move towards opposite directions, so that the double-break isolating switch is switched on simultaneously. In the process from the open state to the closed state, the rotation angle of the main lever 16 is 80 °.
Therefore, the main connecting lever and the two connecting rods are adopted to simultaneously drive the two moving contacts to perform opposite-direction relative motion, compared with a transmission form of a gear rack, the main connecting lever does not need to rotate for multiple circles, the main connecting lever does not rotate for a full circle to meet the moving requirement of the moving contacts, the response speed of opening and closing can be improved, and the connecting rod type structure of the connecting lever is easier to manufacture and is beneficial to reducing the cost; meanwhile, one end of the connecting rod is provided with a guide structure, so that the main crank arm can rotate by the same angle to enable the movable contact to obtain a larger moving stroke under the condition that the length of the main crank arm is the same as that of the connecting rod.
the difference between this embodiment and embodiment 1 is that the guiding movement paths of the first movable contact and the second movable contact in embodiment 1 are parallel to each other and are spaced apart from each other in a direction perpendicular to the movement paths. In the embodiment, as shown in fig. 6 and 7, the guiding movement paths of the first moving contact 04 and the second moving contact 03 are collinear, and accordingly, the first fixed contact and the second fixed contact are located on the same axis, so that the whole moving end can be assembled in a direction perpendicular to the guiding movement direction of the moving contacts or in a more compact structure, and the moving end is suitable for different use requirements.
the present embodiment is different from embodiment 1 in that the main crank arm in embodiment 1 has an arch shape. In the embodiment, the main crank arm is in a U shape, two opposite side arms of the U shape are respectively hinged with the two connecting rods, or in other embodiments, the main crank arm is in a straight plate structure, and the moving contact is hinged on one side of the connecting rods.
the present embodiment is different from embodiment 1 in that the transmission assembly in embodiment 1 includes a link and a guide slide pin inserted into one end of the link. In this embodiment, the transmission assembly includes a connecting rod and two screws threadedly connected to both sides of the connecting rod, and the screws are adapted to slide in the guide sliding grooves.
the present embodiment is different from embodiment 1 in that the guide post in embodiment 1 is provided with a cross groove, the guide slide pin penetrates through the link and has both end portions exposed to both sides of the link, and both ends of the guide slide pin and plate portions of the link on both sides of the guide slide pin respectively extend into four notches of the cross groove. In this embodiment, the guide post is a square column, the connecting rod is located on one side of the guide post, the guide pin penetrates through the connecting rod, one end of the guide pin is provided with a limiting sleeve, the guide post is provided with a guide groove, the guide pin extends into the guide groove, and one end of the guide pin, which is exposed out of the guide groove, is limited through the limiting sleeve, so that the guide pin slides in the guide groove.
Embodiment 6 of the double break isolator switch of the present invention:
the present embodiment is different from embodiment 1 in that the main crank arm in embodiment 1 is plate-shaped, and the link is also plate-shaped. In this embodiment, the main crank arm and the connecting rod are both cylindrical.
Example 7 of the double break disconnector in accordance with the invention:
the present embodiment is different from embodiment 1 in that the guide structure in embodiment 1 is constituted by a guide slide pin and a guide chute. In this embodiment, one end of the connecting rod is integrally provided with a cylindrical guide protrusion, the guide protrusion is provided with a cylindrical expansion head, the guide post is provided with a guide elongated slot, the guide elongated slot is a T-shaped slot, and the guide structure is composed of the guide elongated slot and the guide protrusion.
Embodiment 8 of the double break isolator switch of the present invention:
this embodiment is different from embodiment 1 in that the guide paths of the guide structures that guide the links of the two sets of transmission assemblies in embodiment 1 are collinear. In this embodiment, the guide paths of the guide structures for guiding the connecting rods of the two sets of transmission assemblies are parallel to each other and are arranged at intervals in the direction perpendicular to the guide direction.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and 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 and equivalents can be made in the technical solutions described in the foregoing embodiments without inventive effort, or some technical features of the present invention may be substituted 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 double-break isolating switch comprises a shell, wherein a first static contact seat and a second static contact seat are relatively fixed in the shell, a movable contact seat is arranged between the first static contact seat and the second static contact seat, a first movable contact and a second movable contact are assembled on the movable contact seat in a guiding and sliding manner, the double-break isolating switch also comprises a driving structure, the driving structure comprises a transmission shaft extending into the shell and an operating mechanism which is positioned outside the shell and is in transmission connection with the transmission shaft, the transmission shaft is in transmission connection with the first movable contact and the second movable contact through a transmission structure in the shell and is used for driving the first movable contact and the second movable contact to synchronously act to realize switching-on and switching-off, and the double-break isolating switch is characterized in that the transmission structure in the shell comprises a main connecting lever, the transmission shaft is in rotation stopping connection with the middle of the main connecting lever, two ends of the main connecting lever are respectively linked with two groups of transmission components, the two groups of transmission components respectively drive the first movable contacts to act, the transmission components comprise connecting rods, and the middle of the connecting rods are hinged with the end parts of the main connecting lever, one end of the connecting rod is hinged with the corresponding moving contact, a guide structure used for guiding the other end of the connecting rod is further arranged in the shell, and the guide direction of the guide structure is perpendicular to the guide moving direction of the moving contact.
2. The dual break isolator as claimed in claim 1, wherein the guided movement paths of the first and second movable contacts are parallel to each other and spaced apart in a direction perpendicular to the movement paths.
3. The double-break disconnecting switch of claim 2, wherein the main connecting lever is in an arch shape, the transmission shaft is connected to a middle position of the arch-shaped main connecting lever in a rotation-stopping manner, the connecting rod is connected to an end portion of the arch-shaped main connecting lever in a hinged manner, and the movable contact is partially located in an arch space of the arch-shaped main connecting lever when the movable contact is moved to a position overlapping the main connecting lever in an axial projection direction of the transmission shaft.
4. A double break disconnector according to claim 3, characterized in that the guide paths of the guide structures guiding the connecting rods of both sets of transmission members are collinear.
5. A double break disconnector according to claim 1, characterized in that the guiding movement paths of the first and second moving contacts are collinear, and the guiding paths of the guiding structure guiding the connecting rods of the two sets of transmission members are collinear.
6. A double-break isolating switch as claimed in any one of claims 1 to 5, wherein the guide structure includes a guide runner, and the connecting rod is provided with a guide sliding pin which is slidably inserted into the guide runner and can rotate around its axis in the guide runner.
7. The double-break isolating switch as claimed in claim 6, wherein the connecting rod is in the shape of an elongated plate, the guiding sliding pin is fixedly inserted into the connecting rod perpendicular to the plate surface of the connecting rod, the guiding structure includes a guiding post extending in the guiding direction, the guiding post is provided with a cross slot extending in the axial direction, and two ends of the guiding sliding pin and plate portions of the connecting rod at two sides of the guiding sliding pin respectively extend into four slots of the cross slot.
8. A double break isolating switch as claimed in claim 7, wherein the guide posts of the two guide structures are respectively connected with a fixed flange at the opposite ends, and the fixed flanges are used for being fixedly connected to the movable contact base.
9. A double break disconnector according to claim 8, characterized in that said guide posts are of one-piece cast construction with the fixed flange.
10. A double break disconnector according to any of claims 1-5, characterized in that the transmission shaft is an insulated transmission shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111592934.5A CN114783813A (en) | 2021-12-23 | 2021-12-23 | Double-break isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111592934.5A CN114783813A (en) | 2021-12-23 | 2021-12-23 | Double-break isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114783813A true CN114783813A (en) | 2022-07-22 |
Family
ID=82423870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111592934.5A Pending CN114783813A (en) | 2021-12-23 | 2021-12-23 | Double-break isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114783813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117672758A (en) * | 2023-12-15 | 2024-03-08 | 法腾电力装备江苏有限公司 | Novel longitudinal rotation double-isolating-switch electric mechanism |
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| CN107068470A (en) * | 2016-11-14 | 2017-08-18 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of double-fracture disconnecting switch that there is ground connection to link |
| CN110428995A (en) * | 2019-06-18 | 2019-11-08 | 河南平高电气股份有限公司 | GIS device and its high speed grounding switch |
| CN112840428A (en) * | 2018-09-12 | 2021-05-25 | 西门子能源全球有限公司 | Power switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR1317478A (en) * | 1961-04-07 | 1963-02-08 | Gardy Particip App | Movable contact especially for high voltage disconnector |
| CN102881506A (en) * | 2012-09-29 | 2013-01-16 | 山东泰开隔离开关有限公司 | Single-arm folding inserting type extra-high-voltage direct-current disconnecting switch |
| CN107068470A (en) * | 2016-11-14 | 2017-08-18 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of double-fracture disconnecting switch that there is ground connection to link |
| CN112840428A (en) * | 2018-09-12 | 2021-05-25 | 西门子能源全球有限公司 | Power switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117672758A (en) * | 2023-12-15 | 2024-03-08 | 法腾电力装备江苏有限公司 | Novel longitudinal rotation double-isolating-switch electric mechanism |
| CN117672758B (en) * | 2023-12-15 | 2024-05-28 | 法腾电力装备江苏有限公司 | Longitudinal rotation double-isolating-switch electric mechanism |
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