CN112002574B - Switching-on/off indicating device, quick mechanical switch and direct current breaker - Google Patents
Switching-on/off indicating device, quick mechanical switch and direct current breaker Download PDFInfo
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- CN112002574B CN112002574B CN202010560163.0A CN202010560163A CN112002574B CN 112002574 B CN112002574 B CN 112002574B CN 202010560163 A CN202010560163 A CN 202010560163A CN 112002574 B CN112002574 B CN 112002574B
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- opening
- closing
- mechanical switch
- indicating device
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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
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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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
- H01H9/20—Interlocking, locking, or latching mechanisms
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- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
The invention relates to a switching-on/off indicating device, a quick mechanical switch and a direct current breaker, wherein the switching-on/off indicating device comprises a switching-on/off indicating board and a linkage mechanism, and the switching-on/off indicating board is movably assembled on a corresponding fixed body; the linkage mechanism is used for being in transmission connection between the opening and closing indication board and a driving rod of an upper operating mechanism of the quick mechanical switch; the opening and closing indication board is linked with the driving rod through a linkage mechanism to indicate opening or closing of the quick mechanical switch. The quick mechanical switch comprises the opening and closing indicating device; the direct current circuit breaker comprises the quick mechanical switch. The technical scheme can accurately judge the actual position of the quick mechanical switch, and can ensure the safety of operators during inspection, maintenance or manual operation.
Description
Technical Field
The invention relates to the field of high-voltage direct-current transmission equipment, in particular to a switching-on/off indicating device, a quick mechanical switch and a direct-current circuit breaker.
Background
Along with the large-scale exploitation of fossil energy and environmental problems, the method promotes the optimal allocation of power resources in the global scope, promotes the efficient development and utilization of renewable energy, ensures the reliable supply of power and improves the economical efficiency and the flexibility of the operation of a power grid, and is the key point of the development of power industry. The flexible direct current power transmission has increasingly prominent important roles in power grid construction by virtue of the advantages of the flexible direct current power transmission in the aspects of large-scale renewable energy power generation grid connection, island power transmission, multi-terminal power transmission and the like.
The direct current breaker is core equipment of flexible direct current transmission, and the quick mechanical switch is the core component of direct current breaker, mainly limits the on-off time of direct current breaker. Because the normal operation of the quick mechanical switch is in a high voltage position, the danger of electric shock exists when a human body contacts, and therefore, the actual position of the quick mechanical switch needs to be accurately confirmed before the quick mechanical switch is checked, overhauled and manually operated.
Disclosure of Invention
The invention aims to provide a switching-on/off indicating device, so that an operator can accurately judge the actual position of a quick mechanical switch before operating the quick mechanical switch; the invention also aims to provide a quick mechanical switch capable of accurately judging the actual position of the split switch; the invention also aims to provide a safe and reliable direct current breaker.
In order to achieve the above purpose, the technical scheme of the opening and closing indicating device of the invention is as follows:
opening and closing indicating device includes:
the opening and closing indication board is movably assembled on the corresponding fixed body;
the linkage mechanism is used for being in transmission connection between the opening and closing indication board and a driving rod of an upper operating mechanism of the quick mechanical switch;
the opening and closing indication board is linked with the driving rod through a linkage mechanism to indicate opening or closing of the quick mechanical switch.
The beneficial effects are that: the opening and closing indicating device is applied to the quick mechanical switch, and when a driving rod of an operating mechanism on the quick mechanical switch moves, the driving rod drives the linkage mechanism to act, so that an opening and closing indicating board is driven to act to indicate opening or closing of the quick mechanical switch. The operating condition of the quick mechanical switch at the moment can be intuitively and truly determined by observing the indication position of the opening and closing indication board during actual operation, so that the safety of the operating personnel can be ensured during inspection, maintenance or manual operation. The switching-on/off indication device adopts a mechanical transmission structure to enable the switching-on/off indication board to indicate the actual position of the quick mechanical switch, and even if the power supply system is powered off to cause electronic indication faults, the switching-on/off position of the quick mechanical switch can be accurately indicated, so that the reliability is higher.
Further, the opening and closing indicating device further comprises a sliding part, wherein the sliding part is sleeved on the driving rod and moves downwards along the axial direction of the driving rod when the quick mechanical switch is opened, one end, which is used for being in transmission connection with the driving rod, of the linkage mechanism is defined as an input end of the linkage mechanism, and the input end of the linkage mechanism is in transmission fit with the sliding part so that the weight of the opening and closing indicating device acts on the sliding part when the quick mechanical switch is opened.
The beneficial effects are that: because the input end of the linkage mechanism is in transmission fit with the sliding part, and when the quick mechanical switch is opened, the sliding part moves downwards, so that the linkage mechanism acts under the action of the sliding part to drive the opening and closing indication board to act, the weight of the opening and closing indication device acts on the sliding part in the opening and closing process, and the weight does not form the load of a driving rod, namely the moving mass in the opening and closing process is small, the opening and closing speed of the quick mechanical switch is high, the insulation building time is short, the mechanical reliability is higher, and the equipment operation is safer.
Further, the linkage mechanism is a link mechanism, the opening and closing indication board is used for being rotationally assembled on the fixed body, the link mechanism, the opening and closing indication board and the sliding piece form a sliding block rocker mechanism, and the opening and closing indication board forms a rocker of the sliding block rocker mechanism.
The beneficial effects are that: the slider rocker mechanism is adopted, the direct motion of the driving rod is converted into the rotation of the opening and closing indication board, and the rotation angle of the opening and closing indication board is easier to design through calculation, so that the accuracy of the opening and closing indication device is ensured.
Further, the opening and closing indicating device further comprises a limiting pushing piece, wherein the limiting pushing piece is used for being fixed on the driving rod so as to push the sliding piece to move in the opening and closing process of the quick mechanical switch and stop and limit the sliding piece when the quick mechanical switch is opened.
The beneficial effects are that: the limiting pushing piece can push and limit the sliding piece, so that the normal action of the sliding piece is ensured.
Further, the opening and closing indicating device further comprises an elastic piece, wherein the elastic piece is sleeved on the driving rod, one end of the elastic piece is propped against the sliding piece, the other end of the elastic piece is propped against the fixed body, and the elastic piece is used for applying elastic force to the sliding piece so as to drive the sliding piece to move downwards.
The beneficial effects are that: in the switching-on process, the limiting pushing piece pushes the sliding piece to slide so as to compress the elastic piece, the elastic piece stores certain elastic potential energy after being pressed, in the switching-off process, the elastic potential energy stored by the elastic piece is released, the sliding piece can be pushed to slide along the driving rod towards the switching-off direction, the load of the driving rod is not formed, and the switching-off speed of the quick mechanical switch is not influenced.
Further, the sliding piece comprises a sleeve and a flange arranged on the circumference of the sleeve, the flange extends along the radial direction of the sleeve, the elastic piece is pressed against the flange, and the input end of the linkage mechanism is in transmission fit with the sleeve.
The beneficial effects are that: the flange increases the contact area between the elastic piece and the sliding piece, and ensures that the elastic piece can play a role.
Further, the opening and closing indication board is of a rotary disc type structure, the indication surface of the opening and closing indication board is divided into a plurality of indication areas, the indication areas comprise opening and closing indication areas which are adjacently arranged, and the sum of the areas of the opening and closing indication areas is not larger than half of the area of the indication area on the opening and closing indication board.
The beneficial effects are that: the rotating angle of the opening and closing indication board is guaranteed to meet the requirement that only the opening indication area and the closing indication area on the opening and closing indication board can be seen manually, and misjudgment can not be generated.
Further, the fixed body is a base body of the quick mechanical switch or a fixed body of the opening and closing indicating device.
The beneficial effects are that: when the switch-on/off indicating device is used, the switch-on/off indicating device can be directly arranged on a matrix of the quick mechanical switch, or arranged on the quick mechanical switch through a self-contained fixing body, so that the switch-on/off indicating device is more convenient to install.
The technical scheme of the quick mechanical switch is as follows:
the quick mechanical switch includes divide-shut brake indicating device, and divide-shut brake indicating device includes:
the opening and closing indication board is movably assembled on the corresponding fixed body;
the linkage mechanism is used for being in transmission connection between the opening and closing indication board and a driving rod of an upper operating mechanism of the quick mechanical switch;
the opening and closing indication board is linked with the driving rod through a linkage mechanism to indicate opening or closing of the quick mechanical switch.
The beneficial effects are that: after the opening and closing indicating device is arranged on the quick mechanical switch, when the quick mechanical switch performs opening or closing operation, the driving rod of the operating mechanism drives the linkage mechanism to act, and then the opening and closing indicating board is driven to act to indicate the opening or closing of the quick mechanical switch. The operating condition of the quick mechanical switch at the moment can be intuitively and truly determined by observing the indication position of the opening and closing indication board during actual operation, so that the safety of the operating personnel can be ensured during inspection, maintenance or manual operation. The quick mechanical switch is provided with the opening and closing indicating device with the mechanical transmission structure to enable the opening and closing indicating board to indicate the actual position of the quick mechanical switch, and even if the power supply system is powered down to cause electronic indication faults, the opening and closing position of the quick mechanical switch can be accurately indicated, so that the reliability is higher.
Further, the opening and closing indicating device further comprises a sliding part, wherein the sliding part is sleeved on the driving rod and moves downwards along the axial direction of the driving rod when the quick mechanical switch is opened, one end, which is used for being in transmission connection with the driving rod, of the linkage mechanism is defined as an input end of the linkage mechanism, and the input end of the linkage mechanism is in transmission fit with the sliding part so that the weight of the opening and closing indicating device acts on the sliding part when the quick mechanical switch is opened.
The beneficial effects are that: because the input end of the linkage mechanism is in transmission fit with the sliding part, and when the quick mechanical switch is opened, the sliding part moves downwards, so that the linkage mechanism acts under the action of the sliding part to drive the opening and closing indication board to act, the weight of the opening and closing indication device acts on the sliding part in the opening and closing process, and the weight does not form the load of a driving rod, namely the moving mass in the opening and closing process is small, the opening and closing speed of the quick mechanical switch is high, the insulation building time is short, the mechanical reliability is higher, and the equipment operation is safer.
Further, the linkage mechanism is a link mechanism, the opening and closing indication board is used for being rotationally assembled on the fixed body, the link mechanism, the opening and closing indication board and the sliding piece form a sliding block rocker mechanism, and the opening and closing indication board forms a rocker of the sliding block rocker mechanism.
The beneficial effects are that: the slider rocker mechanism is adopted, the direct motion of the driving rod is converted into the rotation of the opening and closing indication board, and the rotation angle of the opening and closing indication board is easier to design through calculation, so that the accuracy of the opening and closing indication device is ensured.
Further, the opening and closing indicating device further comprises a limiting pushing piece, wherein the limiting pushing piece is used for being fixed on the driving rod so as to push the sliding piece to move in the opening and closing process of the quick mechanical switch and stop and limit the sliding piece when the quick mechanical switch is opened.
The beneficial effects are that: the limiting pushing piece can push and limit the sliding piece, so that the normal action of the sliding piece is ensured.
Further, the opening and closing indicating device further comprises an elastic piece, wherein the elastic piece is sleeved on the driving rod, one end of the elastic piece is propped against the sliding piece, the other end of the elastic piece is propped against the fixed body, and the elastic piece is used for applying elastic force to the sliding piece so as to drive the sliding piece to move downwards.
The beneficial effects are that: in the switching-on process, the limiting pushing piece pushes the sliding piece to slide so as to compress the elastic piece, the elastic piece stores certain elastic potential energy after being pressed, in the switching-off process, the elastic potential energy stored by the elastic piece is released, the sliding piece can be pushed to slide along the driving rod towards the switching-off direction, the load of the driving rod is not formed, and the switching-off speed of the quick mechanical switch is not influenced.
Further, the sliding piece comprises a sleeve and a flange arranged on the circumference of the sleeve, the flange extends along the radial direction of the sleeve, the elastic piece is pressed against the flange, and the input end of the linkage mechanism is in transmission fit with the sleeve.
The beneficial effects are that: the flange increases the contact area between the elastic piece and the sliding piece, and ensures that the elastic piece can play a role.
Further, the opening and closing indication board is of a rotary disc type structure, the indication surface of the opening and closing indication board is divided into a plurality of indication areas, the indication areas comprise opening and closing indication areas which are adjacently arranged, and the sum of the areas of the opening and closing indication areas is not larger than half of the area of the indication area on the opening and closing indication board.
The beneficial effects are that: the rotating angle of the opening and closing indication board is guaranteed to meet the requirement that only the opening indication area and the closing indication area on the opening and closing indication board can be seen manually, and misjudgment can not be generated.
Further, the fixed body is a base body of the quick mechanical switch or a fixed body of the opening and closing indicating device.
The beneficial effects are that: when the switch-on/off indicating device is used, the switch-on/off indicating device can be directly arranged on a matrix of the quick mechanical switch, or arranged on the quick mechanical switch through a self-contained fixing body, so that the switch-on/off indicating device is more convenient to install.
The technical scheme of the direct current breaker is as follows:
the direct current circuit breaker includes quick mechanical switch, and quick mechanical switch includes divide-shut brake indicating device, and divide-shut brake indicating device includes:
the opening and closing indication board is movably assembled on the corresponding fixed body;
the linkage mechanism is used for being in transmission connection between the opening and closing indication board and a driving rod of an upper operating mechanism of the quick mechanical switch;
the opening and closing indication board is linked with the driving rod through a linkage mechanism to indicate opening or closing of the quick mechanical switch.
The beneficial effects are that: after the opening and closing indicating device is arranged on the core component quick mechanical switch of the direct current breaker, when the quick mechanical switch performs opening or closing operation, the driving rod of the operating mechanism can drive the linkage mechanism to act, and then the opening and closing indicating board is driven to act so as to indicate the opening or closing of the quick mechanical switch. The operating condition of the quick mechanical switch at the moment can be intuitively and truly determined by observing the indication position of the opening and closing indication board during actual operation, so that the safety of the operating personnel can be ensured during inspection, maintenance or manual operation. The quick mechanical switch is provided with the opening and closing indicating device with the mechanical transmission structure to enable the opening and closing indicating board to indicate the actual position of the quick mechanical switch, and even if the power supply system is powered down to cause electronic indication faults, the opening and closing position of the quick mechanical switch can be accurately indicated, so that the reliability is higher.
Further, the opening and closing indicating device further comprises a sliding part, wherein the sliding part is sleeved on the driving rod and moves downwards along the axial direction of the driving rod when the quick mechanical switch is opened, one end, which is used for being in transmission connection with the driving rod, of the linkage mechanism is defined as an input end of the linkage mechanism, and the input end of the linkage mechanism is in transmission fit with the sliding part so that the weight of the opening and closing indicating device acts on the sliding part when the quick mechanical switch is opened.
The beneficial effects are that: because the input end of the linkage mechanism is in transmission fit with the sliding part, and when the quick mechanical switch is opened, the sliding part moves downwards, so that the linkage mechanism acts under the action of the sliding part to drive the opening and closing indication board to act, the weight of the opening and closing indication device acts on the sliding part in the opening and closing process, and the weight does not form the load of a driving rod, namely the moving mass in the opening and closing process is small, the opening and closing speed of the quick mechanical switch is high, the insulation building time is short, the mechanical reliability is higher, and the equipment operation is safer.
Further, the linkage mechanism is a link mechanism, the opening and closing indication board is used for being rotationally assembled on the fixed body, the link mechanism, the opening and closing indication board and the sliding piece form a sliding block rocker mechanism, and the opening and closing indication board forms a rocker of the sliding block rocker mechanism.
The beneficial effects are that: the slider rocker mechanism is adopted, the direct motion of the driving rod is converted into the rotation of the opening and closing indication board, and the rotation angle of the opening and closing indication board is easier to design through calculation, so that the accuracy of the opening and closing indication device is ensured.
Further, the opening and closing indicating device further comprises a limiting pushing piece, wherein the limiting pushing piece is used for being fixed on the driving rod so as to push the sliding piece to move in the opening and closing process of the quick mechanical switch and stop and limit the sliding piece when the quick mechanical switch is opened.
The beneficial effects are that: the limiting pushing piece can push and limit the sliding piece, so that the normal action of the sliding piece is ensured.
Further, the opening and closing indicating device further comprises an elastic piece, wherein the elastic piece is sleeved on the driving rod, one end of the elastic piece is propped against the sliding piece, the other end of the elastic piece is propped against the fixed body, and the elastic piece is used for applying elastic force to the sliding piece so as to drive the sliding piece to move downwards.
The beneficial effects are that: in the switching-on process, the limiting pushing piece pushes the sliding piece to slide so as to compress the elastic piece, the elastic piece stores certain elastic potential energy after being pressed, in the switching-off process, the elastic potential energy stored by the elastic piece is released, the sliding piece can be pushed to slide along the driving rod towards the switching-off direction, the load of the driving rod is not formed, and the switching-off speed of the quick mechanical switch is not influenced.
Further, the sliding piece comprises a sleeve and a flange arranged on the circumference of the sleeve, the flange extends along the radial direction of the sleeve, the elastic piece is pressed against the flange, and the input end of the linkage mechanism is in transmission fit with the sleeve.
The beneficial effects are that: the flange increases the contact area between the elastic piece and the sliding piece, and ensures that the elastic piece can play a role.
Further, the opening and closing indication board is of a rotary disc type structure, the indication surface of the opening and closing indication board is divided into a plurality of indication areas, the indication areas comprise opening and closing indication areas which are adjacently arranged, and the sum of the areas of the opening and closing indication areas is not larger than half of the area of the indication area on the opening and closing indication board.
The beneficial effects are that: the rotating angle of the opening and closing indication board is guaranteed to meet the requirement that only the opening indication area and the closing indication area on the opening and closing indication board can be seen manually, and misjudgment can not be generated.
Further, the fixed body is a base body of the quick mechanical switch or a fixed body of the opening and closing indicating device.
The beneficial effects are that: when the switch-on/off indicating device is used, the switch-on/off indicating device can be directly arranged on a matrix of the quick mechanical switch, or arranged on the quick mechanical switch through a self-contained fixing body, so that the switch-on/off indicating device is more convenient to install.
Drawings
FIG. 1 is a schematic diagram of a quick mechanical switch of a DC circuit breaker of the present invention in a closed state;
FIG. 2 is a schematic diagram of the quick mechanical switch of the DC circuit breaker of the present invention in an open state;
fig. 3 is an enlarged view of a portion of a quick mechanical switch of the dc circuit breaker of the present invention;
fig. 4 is a schematic structural diagram of an opening/closing indicator in the quick mechanical switch of the dc breaker according to the present invention;
fig. 5 is a schematic diagram of a state of the rapid mechanical switch of the dc breaker when the opening/closing indicator indicates opening;
fig. 6 is a schematic diagram of a state of the rapid mechanical switch of the dc breaker when the opening/closing indicator indicates closing.
Reference numerals illustrate: the brake-on/off indicator comprises a 1-brake-off indicator, a 2-first connecting rod, a 3-second connecting rod, a 4-sliding piece, a 5-limit pushing piece, a 6-spiral spring, a 7-sleeve, an 8-flange, a 9-rotating shaft, a 10-card body, an 11-brake-off indicator region, a 12-brake-on indicator region, a 13-moving contact, a 14-moving support, a 15-fixed contact, a 16-fixed support, a 17-wiring board, an 18-repulsive force disc, a 19-brake-off coil, a 20-brake-on coil, a 21-insulating filling layer, a 22-connecting board, a 23-slider, a 24-brake-off retaining spring, a 25-cover plate, a 26-driving rod, a 27-retaining mechanism housing, a 28-operating mechanism housing, a 29-insulating cylinder, a 30-limit cylinder, a 31-tail wing and a 32-baffle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are merely some, but not all, of the embodiments of the application. The components of the embodiments of the present application, which are 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 application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and capabilities of the present application are described in further detail below in connection with the examples.
Example 1 of the dc breaker of the present invention:
the direct current breaker comprises a quick mechanical switch which is a core component of the direct current breaker and has millisecond-level opening and closing speeds. As shown in fig. 1, 2 and 3, the quick mechanical switch mainly comprises a switch fracture, an operating mechanism for driving the switch fracture to act, and a holding mechanism for holding the switch fracture at a designed opening and closing position.
Specifically, the switch fracture includes the insulating barrel 29 that extends along upper and lower direction that is shown in fig. 1 and fig. 2, has arranged moving contact 13, fixed contact 15, fixed support 16 and moving support 14 in the inner chamber of insulating barrel 29, and fixed contact 15 removes the assembly on fixed support 16, and the both ends opening part of insulating barrel is provided with wiring board 17, and wiring board 17 can plug insulating barrel 29 again can be connected with external cable, makes fixed contact 15 and moving contact 13 in the insulating barrel 29 control the break-make of this circuit. The stationary support 16 is fixedly assembled with the wiring board on the upper side, and the movable support 14 is fixedly assembled with the wiring board on the lower side. When the quick mechanical switch is in use, the inner cavity of the insulating cylinder 29 is filled with insulating gas.
The operating mechanism is a repulsive force operating mechanism commonly used in the prior art, and in the embodiment, the operating mechanism is arranged below the switch fracture. The operating mechanism mainly comprises a driving rod 26, and a repulsive force disc 18 made of metal is integrally formed in the middle of the driving rod 26. The upper end of the driving rod 26 passes through the wiring board 17 at the lower side of the insulating cylinder 29 and is in transmission connection with the movable contact 13. The operating mechanism further comprises an operating mechanism shell 28 with a cavity, a brake separating coil 19 and a brake closing coil 20 are arranged in the cavity of the operating mechanism shell 28, and the brake separating coil 19 and the brake closing coil 20 are fixed in the operating mechanism shell 28 through an insulating filling layer 21 and are oppositely arranged in the axial direction of the insulating cylinder 29. The repulsive force disc 18 is located between the opening coil 19 and the closing coil 20, and the opening coil 19 is located above the repulsive force disc 18, and the closing coil 20 is located below the repulsive force disc 18. When the opening coil 19 is electrified, the repulsive force disc 18 generates induced current, the induced current interacts with the current which is electrified to the opening coil 19 to generate electromagnetic repulsive force, and the repulsive force drives the driving rod 26 to move downwards so as to drive the moving contact 13 to be separated from the fixed contact 15, so that the opening of the quick mechanical switch is realized. When the closing coil 20 is electrified, the repulsive force disc 18 also generates induced current, the induced current interacts with the current which is electrified to the closing coil 20 to generate electromagnetic repulsive force, and the repulsive force drives the driving rod 26 to move upwards so as to drive the moving contact 13 to contact with the fixed contact 15, so that the closing of the quick mechanical switch is realized.
The holding mechanism is arranged below the operating mechanism and is used for enabling the movable contact 13 to be in a stable closing state or opening state. The holding mechanism housing 27 is connected to the operating mechanism housing 28, and the lower end of the drive lever 26 extends into the holding mechanism housing 27. The holding mechanism further comprises a limiting cylinder 30 which takes the axis of the driving rod 26 as a butt-array axis, opening and closing holding springs 24 which are symmetrically arranged on two radial sides of the driving rod 26, a sliding block 23 which is arranged in the limiting cylinder 30, a cover plate 25 which is arranged at the bottom of the limiting cylinder 30, the opening and closing holding springs 24 are arranged between the sliding block 23 and the cylinder body of the limiting cylinder 30, and the periphery of the opening and closing holding springs 24 are matched with the inner hole of the limiting cylinder 30. One end face of each of the two sliding blocks 23 is pressed against one end of the opening and closing holding spring 24, and the other end of each of the two sliding blocks is hinged with a tail wing 31. The retaining mechanism in this embodiment is also a retaining mechanism commonly used in the art.
The quick mechanical switch further comprises a switching-on/off indicating device, and the switching-on/off indicating device can accurately indicate the actual working position of the quick mechanical switch. As shown in fig. 3, the opening and closing indicating device includes an opening and closing indicating board 1 and a linkage mechanism, wherein the linkage mechanism is in transmission connection between the opening and closing indicating board 1 and a driving rod 26, so that the opening and closing indicating board 1 is linked with the driving rod through the linkage mechanism to indicate opening or closing of the quick mechanical switch. In the present embodiment, the holding mechanism housing 27 serves as a fixed body, the opening/closing direction board 1 is rotatably fitted to the holding mechanism housing 27, and an observation window (not indicated in the figure) is provided on the holding mechanism housing 27. In other embodiments, the fixing body may be a fixing body of the opening/closing indicating device, and the fixing body is fixed on the holding mechanism housing during installation. As shown in fig. 4, the opening/closing sign 1 includes a body 10 and a rotary shaft 9 fixed to the center of the body 10, the rotary shaft 9 being rotatably fitted to a holding mechanism housing 27. The card body 10 is disc-shaped, the surface of the card body is an indication surface, a circular recess is arranged in the center of the indication surface, the rest part of the indication surface is divided into four approximately fan-shaped indication areas on average, the central angle corresponding to each indication area is 90 degrees, the two indication areas are respectively marked with a 'division' character and a 'combination' character, and the other two indication areas are blank areas and are not provided with characters. The mark is a switching-off indication area 11 with a 'switching-on' character, the mark is a switching-on indication area 12 with a 'switching-on' character, the switching-off indication area 11 is adjacent to the switching-on indication area 12, the total central angle of the two areas is 180 degrees after the two areas are combined, and the sum of the areas of the two areas is half of the rest area except for the concave part on the indication surface.
The linkage mechanism is a link mechanism and comprises two sections of links, namely a first link 2 and a second link 3 as shown in fig. 5 and 6, wherein one end of the first link 2 is fixed at the center of the opening and closing indication board 1, the other end of the first link is hinged with the second link 3, and the other end of the second link 3 is in transmission connection with a driving rod 26. One end of the first connecting rod 2 fixed with the opening and closing indication board 1 is defined as an output end of the whole connecting rod mechanism, and one end of the second connecting rod 3 in transmission connection with the driving rod 26 is defined as an input end of the whole connecting rod mechanism. When the driving rod 26 moves upwards, under the action of the connecting rod mechanism, the opening and closing indication board 1 is driven to rotate anticlockwise, and finally the closing indication area 12 corresponds to the observation window, so that an operator can see the 'closing' character through the observation window, and further, the quick mechanical switch is judged to be in a closing state. When the driving rod 26 moves downwards, under the action of the link mechanism, the opening and closing indication board 1 is driven to rotate clockwise, and finally the opening and closing indication area 11 corresponds to the observation window, so that an operator can see the 'opening' character through the observation window, and further, the quick mechanical switch can be judged to be in the opening and closing state.
Because the opening and closing speed of the quick mechanical switch is an important index affecting the performance of the quick mechanical switch, in order to avoid the opening and closing indicating device affecting the opening and closing speed of the quick mechanical switch, in this embodiment, the opening and closing indicating device further includes a sliding member 4, a limiting pushing member 5 and an elastic member. Wherein, the sliding piece 4 is sleeved on the driving rod 26 and can reciprocate up and down along the axial direction of the driving rod 26; the limit pushing member 5 is fixed at the bottom end of the driving rod 26 and moves together with the driving rod 26. The retaining mechanism housing 27 is provided with a shutter 32, the shutter 32 is provided with a through hole through which the driving rod 26 passes, and an elastic member is provided between the shutter 32 and the slider 4 for applying an elastic force to the slider 4 to move it in the direction of opening the shutter.
Specifically, the cross section of the sliding piece 4 is in an I shape, and comprises a sleeve 7 and a flange 8 arranged on the circumference of the sleeve 7, wherein the inner diameter of the sleeve 7 is larger than the outer diameter of the driving rod 26; flanges 8 are provided at the upper and lower axial ends of the sleeve 7, and extend outward in the radial direction of the sleeve 7. Therefore, the flange at the lower side of the sleeve 7 and the limiting pushing piece 5 have larger blocking and limiting area, so that the blocking and limiting effect of the limiting pushing piece 5 on the sleeve 7 is ensured.
The input end of the link mechanism, namely, one end of the second link 3 far away from the first link 2 is hinged on the wall of the sleeve 7, and when the driving rod 26 moves upwards, the limiting pushing piece 5 pushes the sliding piece 4 to move upwards, while the second link 3 is hinged on the sliding piece 4, namely, the input end of the link mechanism is in transmission connection with the driving rod 26 through the sliding piece 4. The whole linkage mechanism, the sliding piece 4 and the opening and closing indication board 1 form a sliding block rocker mechanism, and the opening and closing indication board 1 forms a rocker of the sliding block rocker mechanism, so that the linear motion of the driving rod is converted into the rotation of the opening and closing indication board, and the indication is more accurate.
As shown in fig. 3, the elastic member is a coil spring 6, the coil spring 6 is sleeved on the driving rod 26, the upper end of the coil spring is propped against the baffle 32, the lower end of the coil spring is propped against a flange at the axial end of the sleeve 7, the flange is close to the opening and closing indicator 1, and the propping contact area of the coil spring 6 and the sliding member 4 is increased, so that the coil spring 6 can normally realize compression and extension.
The switching-off process of the direct current breaker comprises the following steps: when the direct current circuit breaker is in a closing state, as shown in fig. 6, the coil spring 6 is in a compressed state, has a certain compression amount, and stores certain elastic potential energy. When a pulse current is generated by the external discharge circuit and flows through the opening coil 19, the current generates an induced current on the repulsive force disc 18, and the induced current interacts with the current in the opening coil 19 and generates an electromagnetic repulsive force axially downward along the driving rod 26, which drives the driving rod 26 downward. At this time, the coil spring 6 releases its elastic potential energy, applies an elastic force to the sliding member, drives the sliding member 4 to move downward along the axial direction of the driving rod 26, and drives the second connecting rod 3 to swing when the sliding member 4 moves downward, so as to drive the first connecting rod 2 to rotate around the center of the opening and closing indication board 1. Because the first connecting rod 2 is fixed at the center of the opening and closing indicator 1, when the first connecting rod 2 rotates, the opening and closing indicator 1 is driven to rotate clockwise around the rotation center until the driving rod 26 drives the moving contact 13 to be separated from the fixed contact 15, and a stable opening and closing state is maintained under the action of the retaining mechanism. The time-division brake indication area 11 corresponds to the observation window, the limit pushing piece 5 is in limit fit with the sliding piece 4 in a blocking mode, an operator can see a division word through the observation window, and further the rapid mechanical switch is judged to be in a brake-division state, and the final brake-division state is shown in fig. 5.
In the opening process, the sliding part 4 moves downwards along the axial direction of the driving rod 26 by means of the gravity of the sliding part and the elasticity of the spiral spring 6 and drives the connecting rod mechanism to act, so that the opening and closing indication board 1 is finally rotated.
Closing process of the direct current breaker: when the dc circuit breaker is in the open state, as shown in fig. 5, the coil spring 6 is in the initial state, and has a rated compression amount in the initial state. When a pulse current is generated by the external discharge circuit through the closing coil 20, the current generates an induced current on the repulsive force disc 18, which interacts with the current in the closing coil 20 and generates an electromagnetic repulsive force axially upward along the driving rod 26, which drives the driving rod 26 upward. At this time, the driving rod 26 drives the limiting pushing member 5 to move upwards together, under the pushing action of the limiting pushing member 5, the sliding member 4 moves upwards along the axial direction of the driving rod 26, and when the sliding member 4 moves upwards, the second connecting rod 3 is driven to swing, and the second connecting rod 3 drives the first connecting rod 2 to rotate around the center of the opening and closing indication board 1. Because the first connecting rod 2 is fixed at the center of the opening and closing indicator 1, when the first connecting rod 2 rotates, the opening and closing indicator 1 is driven to rotate anticlockwise around the rotation center until the driving rod 26 drives the moving contact 13 to be combined with the fixed contact 15, and a stable closing state is maintained under the action of the retaining mechanism. At this time, the closing indication area 12 corresponds to the observation window, and an operator can see the "closing" character through the observation window, so as to accurately determine that the quick mechanical switch is in a closing state, and the final closing state is shown in fig. 6.
In the closing process, the driving rod 26 needs to drive the limiting pushing piece 5 to push the sliding piece 4, so that in the process, the opening and closing indicating device forms the load of the driving rod, but the rapid mechanical switch has long closing time, low closing speed and small operation mechanical impact load, so that the opening and closing indicating device increases the moving load of closing, but has small integral mechanical operation impact and mechanical strength meeting the requirement.
It should be noted that, the rotation angle of the opening/closing indicator 1 is designed correspondingly according to the specification of the corresponding dc breaker, that is, the central angles corresponding to the opening/closing indicator 11 and the closing indicator 12 are not necessarily 90 °, the indicator on the opening/closing indicator is not necessarily equally divided into four parts, and other embodiments may be equally divided into five parts, but no matter how the two parts are divided, the indication areas on the opening/closing indicator except the opening/closing indicator and the closing indicator do not correspond to the observation window, that is, the operator does not find the indication area without a word through the observation window, and only can see the opening/closing indicator with a "division" word or the closing indicator with a "closing" word.
The opening and closing indicating device on the direct current breaker adopts a mechanical structure, can reliably indicate the actual working position of the quick mechanical switch, and the quality of the opening and closing structure does not influence the opening and closing characteristics of the quick mechanical switch, even if the power supply system is powered off to cause electronic indication faults, the opening and closing position of the quick mechanical switch can be accurately indicated, and the running reliability of equipment is higher.
Example 2 of the dc breaker of the present invention:
the difference between this embodiment and embodiment 1 is that in this embodiment, the opening/closing indication device only includes the opening/closing indication board and the linkage mechanism, but does not include the sliding member and the limiting pushing member, and correspondingly, the input end of the linkage mechanism is directly in transmission fit with the driving rod. At this time, the whole opening and closing indicating device has a simple structure and low manufacturing cost, and the opening and closing indicating device can form the load of the driving rod when the quick mechanical switch is opened, but only meets the opening and closing speed requirement of the quick mechanical switch.
Example 3 of the dc breaker of the invention:
the difference between this embodiment and the above embodiment 1 is that in this embodiment, the opening and closing indicating device does not include the sliding member and the limiting pushing member, but the linkage mechanism is a gear transmission mechanism, and includes at least a first gear rotatably assembled on the driving rod and a second gear fixed on the opening and closing indicator, when the driving rod moves up and down, the first gear and the second gear are engaged and driven to drive the opening and closing indicator to rotate, so as to indicate the opening or closing of the quick mechanical switch. When the first gear and the second gear are also provided with a transmission gear set, the first gear is meshed with the transmission gear set for transmission when the driving rod moves up and down, and the transmission gear set is meshed with the second gear for transmission, so that the opening and closing indication board is driven to rotate to indicate opening or closing of the quick mechanical switch.
In other embodiments, the opening and closing indication board can be assembled on the fixed body in a direct-acting manner, namely, when the driving rod moves up and down, the opening and closing indication board is driven to move up and down through the linkage mechanism, at the moment, the opening and closing indication area and the closing indication area are opposite up and down but not adjacent to each other, the linkage mechanism can still adopt a connecting rod mechanism, the input end of the connecting rod mechanism is fixed on the opening and closing indication board, the output end of the connecting rod mechanism is fixed on the driving rod, and at the moment, the opening and closing indication board moves directly along with the direct movement of the driving rod.
Example 4 of the dc breaker of the invention:
the difference between this embodiment and embodiment 1 is that in this embodiment, no elastic member is provided, and at this time, when the driving rod moves downward in the opening process, the sliding member completely relies on its own gravity to move downward along the axial direction of the driving rod, so as to drive the link mechanism to act.
Example 5 of the dc breaker of the invention:
the difference between this embodiment and the above embodiment 1 is that in this embodiment, the cross section of the sliding member is in a T shape, that is, the flange is only disposed on one side of the sleeve close to the opening/closing indication board, and at this time, the limiting pushing member still can realize pushing and limiting effects on the sliding member, but the overall structure of the sliding member is simple.
In other embodiments, the sliding member may not be provided with a flange, but only include a sleeve, and in this case, in order to ensure that the elastic member contacts the top surface of the sliding member, the wall thickness of the sleeve may be made thicker, so that the overall structure of the sliding member is simpler.
Example 6 of the dc breaker of the invention:
this embodiment differs from embodiment 1 described above in that in this embodiment, the stopper pusher is not provided, but a flange is directly provided in the circumferential direction of the drive lever outward in the radial direction thereof, and the flange is used as the stopper pusher.
Embodiments of the fast mechanical switch of the present invention:
the structure of the quick mechanical switch can adopt the quick mechanical switch in any one embodiment of the direct current breaker, and is not described herein.
Embodiments of the opening and closing indicating device of the present invention:
the structure of the opening and closing indicating device can adopt the opening and closing indicating device in any one embodiment of the direct current circuit breaker, and the details are not repeated here.
The above description is only a preferred embodiment of the present application, and is not intended to limit the present application, and the patent protection scope of the present application is defined by the claims, and all equivalent structural changes made by the specification and the attached drawings of the present application should be included in the protection scope of the present application.
Claims (9)
1. The opening and closing indicating device is characterized by comprising an opening and closing indicating plate movably assembled on a corresponding fixed body and a linkage mechanism which is used for being in transmission connection between the opening and closing indicating plate and a driving rod of an upper operating mechanism of the quick mechanical switch, wherein the opening and closing indicating plate is linked with the driving rod through the linkage mechanism to indicate opening or closing of the quick mechanical switch; the opening and closing indicating device further comprises a sliding part, the sliding part is sleeved on the driving rod and can reciprocate up and down along the axial direction of the driving rod, the linkage mechanism is a connecting rod mechanism, one end, which is used for being in transmission connection with the driving rod, of the connecting rod mechanism is defined as an input end of the connecting rod mechanism, and the input end of the connecting rod mechanism is hinged with the sliding part so that the weight of the opening and closing indicating device acts on the sliding part when the quick mechanical switch is opened.
2. The opening and closing indicating device according to claim 1, wherein the opening and closing indicating plate is rotatably assembled on the fixed body, the link mechanism, the opening and closing indicating plate and the sliding piece form a slider rocker mechanism, and the opening and closing indicating plate forms a rocker of the slider rocker mechanism.
3. The opening and closing indicating device according to claim 1, further comprising a limit pushing member, wherein the limit pushing member is fixed on the driving rod, so as to push the sliding member to move during the opening and closing of the quick mechanical switch and stop and limit the sliding member during the opening and closing of the quick mechanical switch.
4. The opening and closing indicating device according to any one of claims 1 to 3, further comprising an elastic member, wherein the elastic member is sleeved on the driving rod, one end of the elastic member pushes against the sliding member, the other end of the elastic member pushes against the fixed body, and the elastic member is used for applying an elastic force to the sliding member to drive the sliding member to move downwards.
5. The opening/closing indicating device according to claim 4, wherein the sliding member includes a sleeve and a flange provided in a circumferential direction of the sleeve, the flange extends in a radial direction of the sleeve, the elastic member is pressed against the flange, and an input end of the linkage mechanism is in driving engagement with the sleeve.
6. The opening and closing indicating device according to any one of claims 1-3, wherein the opening and closing indicating board is of a rotary disc structure, the indicating surface of the opening and closing indicating board is divided into a plurality of indicating areas, the indicating areas comprise opening indicating areas and closing indicating areas which are adjacently arranged, and the sum of the areas of the opening indicating areas and the closing indicating areas is not more than half of the area of the indicating area on the opening and closing indicating board.
7. A closing indicating device according to any one of claims 1-3, wherein the fixed body is a base body of a fast mechanical switch or a fixed body of the closing indicating device.
8. The quick mechanical switch is characterized by comprising a switching-on/off indicating device, wherein the switching-on/off indicating device is as claimed in any one of claims 1 to 7.
9. A direct current circuit breaker comprising a fast mechanical switch, characterized in that the fast mechanical switch is a fast mechanical switch according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560163.0A CN112002574B (en) | 2020-06-18 | 2020-06-18 | Switching-on/off indicating device, quick mechanical switch and direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010560163.0A CN112002574B (en) | 2020-06-18 | 2020-06-18 | Switching-on/off indicating device, quick mechanical switch and direct current breaker |
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| Publication Number | Publication Date |
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| CN112002574A CN112002574A (en) | 2020-11-27 |
| CN112002574B true CN112002574B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010560163.0A Active CN112002574B (en) | 2020-06-18 | 2020-06-18 | Switching-on/off indicating device, quick mechanical switch and direct current breaker |
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| CN (1) | CN112002574B (en) |
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| GB2400494A (en) * | 2003-04-10 | 2004-10-13 | Get Plc | Dimmer switch |
| CN203312140U (en) * | 2013-06-06 | 2013-11-27 | 安徽合电正泰电气成套设备有限公司 | Switch-on-off indicator linkage mechanism for vacuum circuit breaker |
| CN204360952U (en) * | 2014-12-31 | 2015-05-27 | 上海华通开关厂有限公司 | The device of accurate instruction divide-shut brake position |
| CN109509685A (en) * | 2018-10-08 | 2019-03-22 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of breaker on/off switch indicating mechanism |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2755758Y (en) * | 2004-12-24 | 2006-02-01 | 西安西开高压电气股份有限公司 | On-off position indicator |
| CN200953308Y (en) * | 2006-10-11 | 2007-09-26 | 上海天灵开关厂有限公司 | Interlocking and position indicating mechanism for circuit breaker cabinet |
| KR100876408B1 (en) * | 2007-07-12 | 2008-12-31 | 엘에스산전 주식회사 | Air circuit breaker with mechanical trip indicating mechanism |
| CN201425904Y (en) * | 2009-06-10 | 2010-03-17 | 无锡市凯旋电机有限公司 | Display device of electric operating mechanism |
| CN202384252U (en) * | 2011-12-19 | 2012-08-15 | 凤凰科技集团有限公司 | Rapid switching on/off indicating device for permanent magnet circuit-breaker |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2400494A (en) * | 2003-04-10 | 2004-10-13 | Get Plc | Dimmer switch |
| CN203312140U (en) * | 2013-06-06 | 2013-11-27 | 安徽合电正泰电气成套设备有限公司 | Switch-on-off indicator linkage mechanism for vacuum circuit breaker |
| CN204360952U (en) * | 2014-12-31 | 2015-05-27 | 上海华通开关厂有限公司 | The device of accurate instruction divide-shut brake position |
| CN109509685A (en) * | 2018-10-08 | 2019-03-22 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of breaker on/off switch indicating mechanism |
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| CN112002574A (en) | 2020-11-27 |
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