CN108364819B - Isolating switch operating device and isolating switch with same - Google Patents
Isolating switch operating device and isolating switch with same Download PDFInfo
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- CN108364819B CN108364819B CN201810387187.3A CN201810387187A CN108364819B CN 108364819 B CN108364819 B CN 108364819B CN 201810387187 A CN201810387187 A CN 201810387187A CN 108364819 B CN108364819 B CN 108364819B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 138
- 230000007246 mechanism Effects 0.000 claims abstract description 115
- 230000000670 limiting effect Effects 0.000 claims abstract description 55
- 238000004146 energy storage Methods 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 38
- 238000002955 isolation Methods 0.000 claims description 34
- 230000009471 action Effects 0.000 claims description 9
- 230000002441 reversible effect Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000006378 damage Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000033001 locomotion Effects 0.000 description 8
- 238000005381 potential energy Methods 0.000 description 7
- 238000010891 electric arc Methods 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/08—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses an isolating switch operating device and an isolating switch with the same, comprising a shell and a grounding operating mechanism, wherein the grounding operating mechanism comprises a grounding operating shaft, a grounding transmission shaft, a transmission mechanism, a first elastic piece, a driving piece and a locking mechanism, the driving arm is locked after the grounding breaking of the locking mechanism is completed, and the driving piece positively rotates to a set position to unlock the locking mechanism and the locking fit of the driving arm. When the grounding operation mechanism is used for opening the brake, the driving arm and the locking mechanism form locking fit, so that the transmission mechanism keeps the opening position to be locked, and the function of limiting in-place opening is achieved; when the grounding operation mechanism is switched on, the driving arm is locked in the first half of the switching-on process, the first elastic piece stores energy and keeps the energy, and the driving arm starts to release energy after the driving arm is unlocked from the locking mechanism, so that quick switching-on is realized. The grounding operation mechanism has the limiting and retaining functions during opening and the energy storage and retaining functions during closing.
Description
Technical Field
The invention relates to the technical field of medium-high voltage electric appliances, in particular to an isolating switch operating device.
Background
The load switch in the ring main unit usually requires three stations, namely load cut-off, isolation circuit and feasible ground. In the prior art, a three-station isolating switch is often adopted, the three-station isolating switch integrates the functions of the isolating switch and the grounding switch, and a knife switch is adopted, so that mechanical locking can be realized, the main loop is prevented from being provided with the grounding switch, and damage caused by misoperation is avoided.
The main part of the three-station isolating switch is a three-station operating mechanism, the existing three-station operating mechanism comprises an isolating operating shaft, a grounding operating shaft and an output shaft which is respectively connected with the isolating operating shaft and the grounding operating shaft through a connecting rod mechanism, and output crank arms are arranged at two ends of the output shaft and used for connecting the isolating switch shaft or the grounding end. The isolating operation shaft and the grounding operation shaft are respectively provided with an energy storage spring, when the isolating operation shaft or the grounding operation shaft idly rotates manually to a zero limit point for releasing potential energy of the energy storage spring, the energy storage spring is utilized to rapidly release the potential energy to drive the isolating operation shaft or the grounding operation shaft to rotate, and an output crank arm on an output shaft is driven to rotate at three working positions of closing, opening and grounding through a connecting rod mechanism, so that the time of closing, opening or grounding end opening and closing in the closing and opening operation and grounding operation process is greatly shortened.
In order to ensure the safety of the grounding switch-on, the electric arc can be extinguished rapidly, and a vacuum arc-extinguishing chamber is usually adopted for the grounding end. Specifically, be provided with the energy storage turning arm of connecting energy storage spring on the ground connection operating shaft, link mechanism connects ground connection operating shaft and output shaft and is used for transmitting motion and power, and output turning arm is connected with vacuum interrupter's movable guide arm, and the operation process is: the grounding operation shaft is manually rotated to drive the energy storage crank arm to rotate so that the energy storage spring can finish energy storage, middle-passing and energy storage release, namely, the energy storage spring can start energy release at the middle-passing position, the grounding operation shaft is driven to rapidly rotate through the energy storage crank arm in the energy release process, the output crank arm is driven to rotate through the connecting mechanism, the output crank arm drives the movable guide rod to act when rotating along with the output shaft, and therefore the movable contact and the fixed contact of the vacuum arc extinguishing chamber act to realize opening or closing, and the grounding opening and closing function of the isolating switch is realized.
However, the above prior art has the following problems:
firstly, in the grounding switching-off process, as the potential energy of an energy storage spring is larger, a mechanical impact is generated when a connecting rod mechanism and a grounding operation shaft move to a switching-off position under the action of the energy storage spring, the mechanical impact can cause switching-off rebound of a grounding contact, and when a recovery voltage exists between a moving contact and a fixed contact of a vacuum arc-extinguishing chamber, the switching-off rebound is easy to cause an arc re-combustion phenomenon to burn the contact, thereby causing potential safety hazards and shortening the service life of the contact;
secondly, the link mechanism cannot be accurately stopped at a set position under the action of the energy storage spring, and normally moves beyond the set position; and in the process of grounding closing, the energy storage time of the energy storage spring is shorter, the energy storage can be released earlier, the energy storage effect is poor, the closing speed of the operating mechanism is influenced, the closing time is prolonged, the moving end of the vacuum arc-extinguishing chamber is caused to generate arc discharge during closing, the damage to the contact is serious, and therefore potential safety hazards are caused, and the service lives of the contact and the vacuum arc-extinguishing chamber are shortened.
Disclosure of Invention
Therefore, in order to overcome the defects in the prior art, the invention aims to provide the isolating switch operating device which can lock the connecting rod mechanism and the output shaft at the opening position in the grounding opening process, thereby preventing mechanical impact to avoid the opening rebound of the grounding contact, can keep the energy storage of the energy storage spring in the grounding closing process, improve the energy storage effect and the closing speed, and further avoid the arc discharge phenomenon of the vacuum arc extinguishing chamber during the closing process, and is safe and reliable.
The invention provides an isolating switch operating device, which comprises a shell and a grounding operating mechanism arranged on the shell, wherein the grounding operating mechanism comprises a grounding operating shaft arranged on the shell, a grounding transmission shaft linked with the grounding operating shaft and a transmission mechanism linked with a grounding contact; the transmission mechanism comprises a driving arm rotatably arranged on the grounding transmission shaft; the driving arm rotates forward or reversely to drive the transmission mechanism to move so as to realize grounding switch-on or grounding switch-off;
the grounding operation mechanism further includes:
the first elastic piece is arranged between the shell and the grounding transmission shaft; the first elastic piece stores energy and releases energy in the forward or reverse rotation process of the grounding transmission shaft;
the driving piece is arranged on the grounding transmission shaft in a linkage way, and the driving arm is driven to rotate forwards by the driving piece in the process of releasing energy storage in the forward direction of the first elastic piece; in the process of reversely releasing and storing energy, the driving arm is driven to reversely rotate by the driving piece;
and the locking mechanism locks the driving arm after the grounding brake is separated, and the driving piece positively rotates to a set position to unlock the locking mechanism and the locking cooperation of the driving arm.
As a preferable scheme, the driving piece comprises two driving bulges which are arranged by taking the grounding transmission shaft as a central shaft and setting radian at intervals, the driving arm is provided with a matching bulge matched with the driving bulge, and the driving arm is driven to rotate around the shaft by the matching of the driving bulge and the matching bulge in the process of rotating around the shaft.
As a preferable scheme, the locking mechanism comprises a locking rod rotatably mounted on the shell, and a limiting groove for limiting the matching protrusion is formed at one end of the locking rod towards one side of the grounding transmission shaft; the locking mechanism further comprises a second elastic piece arranged between the shell and the locking rod, and the locking rod rotates in a direction approaching to the grounding transmission shaft under the action of the second elastic piece; the driving piece is provided with an unlocking protrusion which rotates to a set position to drive the locking rod to reversely rotate against the elastic force of the second elastic piece and separate from the locking of the matching protrusion.
As a preferable scheme, the driving piece is a cam component which rotates along with the grounding transmission shaft, the cam component comprises an arc-shaped protruding part, and a first notch end and a second notch end are respectively formed at two ends of the protruding part; the first notch end and the second notch end are two driving protrusions, and a protrusion part between the two ends of the first notch end and the second notch end is the unlocking protrusion.
As a preferable scheme, the device further comprises an intermediate splint which is arranged on the grounding transmission shaft and fixed relative to the shell, the locking rod is hinged to the intermediate splint through a rotating shaft, the second elastic piece is a torsion spring sleeved on the rotating shaft, one end of the second elastic piece is propped against the shell, and the other end of the second elastic piece is propped against the locking rod.
As a preferable scheme, the driving arm is provided with pin shaft pieces penetrating through two side surfaces of the driving arm, one end, close to the middle clamping plate, of the pin shaft piece is slidably arranged in an arc-shaped groove formed in the middle clamping plate, and the other end, close to the driving piece, of the pin shaft piece is the matching protrusion.
As a preferable scheme, one end of the grounding transmission shaft is provided with a rocker arm, the eccentric end of the rocker arm is fixedly connected with the first elastic piece, and the other end of the first elastic piece is rotatably connected with a mounting shaft arranged on the shell.
As a preferable scheme, the shell is provided with a grounding output shaft, the transmission mechanism further comprises a contact linkage arm rotatably connected with the grounding output shaft and linked with the grounding contact, and a connecting plate with two ends rotatably connected with the contact linkage arm and the driving arm.
As a preferable scheme, the device further comprises an isolation operating mechanism, wherein the isolation operating mechanism comprises an isolation operating shaft and an isolation transmission shaft driven by the isolation operating shaft, the isolation transmission shaft is arranged in parallel with the grounding transmission shaft, a first interlocking mechanism for limiting the rotation of the grounding transmission shaft in an isolation closing state and a second interlocking mechanism for limiting the rotation of the isolation transmission shaft in the grounding closing state are arranged between the isolation transmission shaft and the grounding transmission shaft.
As a preferable scheme, the first interlocking mechanism comprises a first limiting plate fixedly arranged on the grounding transmission shaft and a second limiting plate fixedly arranged on the isolation transmission shaft corresponding to the first limiting plate, and the second limiting plate is opposite to or propped against the first limiting plate when the isolation transmission shaft is switched on.
As a preferable scheme, the second interlocking mechanism comprises a third limiting plate and a fourth limiting plate, wherein the third limiting plate is formed on the driving arm, the fourth limiting plate is fixedly arranged on the isolating transmission shaft corresponding to the third limiting plate, and the third limiting plate is opposite to or propped against the fourth limiting plate when the grounding transmission shaft is switched on.
The invention also provides a disconnecting switch, which comprises the disconnecting switch operating device.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. according to the isolating switch operating device provided by the invention, the grounding operating shaft is operated to drive the grounding transmission shaft and the driving arm to rotate forwards or reversely, so that the grounding switching-off or switching-on action of the grounding operating mechanism is realized, when the grounding switching-off is completed, the driving arm and the locking mechanism are driven by the driving piece to be matched and locked, namely, the driving arm is limited to rotate again after switching-off in place, so that the transmission mechanism and the grounding contact are kept to be locked in the switching-off position, the switching-off in place limitation is realized when the grounding operating mechanism is switched from a switching-on state to a switching-off state, the mechanical impact is avoided in the switching-off process, the purpose of reducing the switching-off rebound of the movable end of the vacuum arc extinguishing chamber is achieved, and the safety is better; when the grounding switching-on operation is performed, the driving arm is locked by the locking mechanism in the first half of switching-on process and kept motionless, so that the moving end of the vacuum arc-extinguishing chamber is kept motionless, and the driving arm is positioned in a motion section for releasing energy stored by the first elastic piece; when the driving piece drives the driving arm and the locking mechanism to release the locking fit, the grounding transmission shaft is enabled to rapidly switch on and rotate under the release of the first elastic piece, so that the driving mechanism moves to a switch-on position, the energy storage effect of the first elastic piece is improved, the release of the energy is large, the switch-on speed of the grounding operation mechanism is further improved, the moving contact and the fixed contact in the vacuum arc-extinguishing chamber are ensured to generate electric arcs in the switch-on moment, the phenomenon of arc discharge is avoided, the damage to the contact is reduced, and the service life of the grounding arc-extinguishing chamber is prolonged. From the above, the grounding operation mechanism has the limit and hold functions during opening and closing, and has the energy storage and hold functions during closing.
2. In the isolating switch operating device provided by the invention, the driving piece comprises two driving bulges, the driving arm is provided with the matching bulges matched with the driving bulges, the driving piece is driven to rotate around the shaft through the matching of the driving bulges and the matching bulges in the rotating process of the driving piece around the shaft, in the structural arrangement, radians are arranged between the two driving bulges at intervals, the driving piece can be respectively matched with the matching bulges when the grounding transmission shaft is switched on and switched off to rotate, namely, one driving bulge is used for driving the driving arm to rotate forward when the grounding transmission shaft is switched on, and the other driving bulge is used for driving the driving arm to rotate reversely when the grounding transmission shaft is switched off, so that the driving piece can transmit motion and force between the grounding transmission shaft and the driving arm.
3. In the isolating switch operating device provided by the invention, one end of the locking rod faces one side of the grounding transmission shaft and is provided with the limiting groove for limiting the matching bulge, the locking rod rotates towards the direction close to the grounding transmission shaft under the action of the second elastic piece, and the second elastic piece can provide locking acting force when the matching bulge is locked into the limiting groove, so that locking matching is realized, and at the moment, the driving arm is kept at the opening position and does not act, and the opening limiting effect is realized on the driving arm; in order to release the locking cooperation of the driving arm and the locking rod in the closing process, the driving piece is provided with an unlocking protrusion which rotates to a set position to drive the locking rod to overcome the elastic force of the second elastic piece to reversely rotate and separate from the locking protrusion, and when the grounding closing is carried out, the unlocking protrusion of the driving piece pushes the locking rod to reversely rotate along with the forward rotation process of the grounding transmission shaft to release until the locking protrusion is separated, so that the limiting groove and the matching protrusion are mutually released until the locking protrusion is separated, and the locking device is reasonable in design and reliable in cooperation.
4. In the disconnecting switch operating device provided by the invention, the driving piece is a cam component which rotates along with the grounding transmission shaft, the cam component comprises an arc-shaped protruding part, and the two ends of the protruding part are respectively provided with a first notch end and a second notch end. This structure sets up, when cam part follows the earthing transmission shaft separating brake reverse rotation, drives through first notch end the cooperation protruding card is gone into in order to form locking cooperation in the spacing groove, and when cam part follows the earthing transmission shaft closing a floodgate forward rotation, jack-up locking lever is high in order to release locking cooperation through the unblock arch, by second notch end drives the cooperation protruding break away from spacing groove and move to the closing position, at this moment, the locking lever supports under the effect of second elastic component on the bellied arc terminal surface of unblock.
5. According to the isolating switch operating device provided by the invention, one end of the first elastic piece is an energy storage spring, the other end of the first elastic piece is fixed on the eccentric end of the rocker arm, and the other end of the first elastic piece is rotatably connected to the mounting shaft arranged on the shell, during the grounding closing process, the first elastic piece stores energy when the grounding transmission shaft is in closing rotation, and is always in an energy storage maintaining state during the locking period of the driving arm by the locking mechanism, so that the zero boundary point for releasing potential energy is gradually reached, the maximum energy storage effect of the energy storage spring is achieved when the energy storage spring is closed, the potential energy is large, when the locking mechanism and the driving arm are released from locking fit, the first elastic piece continuously rotates along with the grounding transmission shaft and releases energy storage, and the grounding transmission shaft is driven to rapidly close and rotate during the releasing energy, so that the closing speed is improved, the closing operation time is greatly shortened, the safety of grounding closing is ensured, and the vacuum arc extinguishing chamber can rapidly extinguish the arc.
6. In the isolating switch operating device provided by the invention, the first interlocking mechanism for limiting the closing operation of the grounding transmission shaft and the second interlocking mechanism for limiting the closing operation of the isolating transmission shaft are respectively formed between the isolating transmission shaft and the grounding transmission shaft, and the structure is arranged to ensure that the working position of the operating device is either at the isolating closing position or at the isolating opening position or the grounding position, so that mechanical locking is realized, the main loop is prevented from being electrified to close to the grounding knife, and the harm caused by misoperation is avoided, so that the related regulations of safe operation are met: the grounding switch is required to be separated firstly, and then the isolating switch is closed, so that the isolating switch is prevented from being closed before the grounding switch is not grounded, or the grounding switch is prevented from being closed before the isolating switch is not separated, and the operation safety is ensured.
7. The isolating switch provided by the invention is provided with the isolating switch operating device, so that the isolating switch has all the advantages brought by the arrangement of the isolating switch operating device, the switching among three stations of isolating switch-on, isolating switch-off and grounding switch-on can be realized, the main loop is prevented from being electrified to switch on the grounding knife, and the harm brought by misoperation is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic diagram of a disconnecting switch operating device provided by the invention;
FIG. 2 is a schematic view of the internal structure of the disconnecting switch operating device shown in FIG. 1;
FIG. 3 is a schematic view of the structure of the isolating switch operating device in the earthing switch-on/switch-off position;
FIG. 4 is a schematic view of the structure of the isolating switch operating device in the grounding/isolating switch-off position;
FIG. 5 is a schematic view of the structure of the isolating switch operating device in the grounding switch-off/switch-on position;
FIG. 6 is a schematic view of the engagement structure of the locking mechanism and the driving member of the present invention;
reference numerals illustrate: 1-a shell, 11-an intermediate splint, 12-a first bevel gear, 13-a second bevel gear, 2-a grounding operation shaft, 3-a grounding transmission shaft, 30-a rocker arm, 31-a driving piece, 310-a protruding part, 311-a first notch end, 312-a second notch end, 32-a first limiting plate, 4-an output shaft, 5-a transmission mechanism, 50-matching bulges, 51-driving arms, 52-connecting plates, 53-contact linkage arms, 54-third limiting plates, 6-locking mechanisms, 61-locking rods, 62-second elastic pieces, 63-limiting grooves, 7-first elastic pieces, 8-isolation operation shafts, 9-isolation transmission shafts, 91-second limiting plates and 92-fourth limiting plates.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown.
In the description of the present invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
The present embodiment is specifically described below with reference to the accompanying drawings:
the embodiment provides a disconnecting switch operating device as shown in fig. 1-6, which comprises a shell 1 and a grounding operating mechanism arranged on the shell, wherein the grounding operating mechanism comprises a grounding operating shaft 2 arranged on the shell 1, a grounding transmission shaft 3 arranged on the shell 1 and linked with the grounding operating shaft 2, and a transmission mechanism 5 linked with a grounding contact; the transmission mechanism 5 comprises a driving arm 51 rotatably arranged on the grounding transmission shaft 3; the driving arm 51 rotates forward or reversely to drive the transmission mechanism 5 to move so as to realize grounding switch-on or grounding switch-off;
the grounding operation mechanism further includes:
a first elastic member 7 disposed between the housing 1 and the ground transmission shaft 3; the first elastic piece 7 stores energy and releases the energy in the forward or reverse rotation process of the grounding transmission shaft 3;
the driving member 31 is arranged on the grounding transmission shaft 3 in a linkage manner, and the driving arm 51 is driven to rotate forward by the driving member in the process of releasing energy storage in the forward direction of the first elastic member 7, namely, the grounding switching-on operation is executed; in the process of reversely releasing and storing energy, the driving arm 51 is driven to reversely rotate through the driving piece 31, namely, the grounding brake-separating operation is carried out;
and the locking mechanism 6 locks the driving arm 51 after the grounding brake is opened, and the driving piece 31 rotates forward to a set position to unlock the locking cooperation of the locking mechanism 6 and the driving arm 51.
In the above embodiment, the grounding operation shaft 2 is manually operated to drive the grounding transmission shaft 3 and the driving arm 51 to rotate forward or backward, so as to realize the grounding opening or closing action of the grounding operation mechanism, when the grounding opening is completed, the driving arm 51 and the locking mechanism 6 are driven by the driving piece to be matched and locked, namely, the driving arm 51 is limited to rotate again after opening in place, so that the transmission mechanism and the grounding contact keep the opening position to be locked, the opening limitation is realized when the grounding operation mechanism is switched from the closing state to the opening state, the mechanical impact is avoided in the opening process, the purpose of reducing the opening rebound of the movable end of the vacuum arc extinguishing chamber is achieved, and the safety is better; and when the grounding switching-on operation is carried out, the driving arm 51 is locked by the locking mechanism 6 in the first half of switching-on process and is kept motionless, so that the moving end of the vacuum arc-extinguishing chamber is kept motionless, the first elastic piece 7 is in an energy storage keeping state, and the driving arm is positioned in a motion section of releasing the energy storage of the first elastic piece, when the driving piece drives the driving arm 51 and the locking mechanism 6 to release locking coordination, the grounding transmission shaft is enabled to rapidly switch on and rotate under the energy release of the first elastic piece 7, so that the driving mechanism moves to a switching-on position, the energy storage effect of the first elastic piece is improved, the energy release is large, the switching-on speed of the grounding operation mechanism is further improved, the moving contact and the fixed contact in the vacuum arc-extinguishing chamber are ensured to generate electric arcs at the switching-on moment, the phenomenon of arc discharge is avoided, the damage to the contact is reduced, and the service life of the grounding arc-extinguishing chamber is prolonged. From the above, the grounding operation mechanism has the limit and hold functions during opening and closing, and has the energy storage and hold functions during closing.
The manner in which the drive member and drive arm are arranged is described in detail below in connection with fig. 3-5:
the driving piece 31 comprises two driving protrusions which are arranged by taking the grounding transmission shaft 3 as a central shaft and setting radian at intervals, the driving arm 51 is provided with a matching protrusion 50 which is matched with the driving protrusion, and the driving arm 51 is driven to rotate around the shaft by the matching of the driving protrusion and the matching protrusion in the process of rotating around the shaft of the driving piece 31. In the above structure setting, the radian is set at intervals between two driving protrusions, and the two driving protrusions can be respectively matched with the matched protrusion 50 when the grounding transmission shaft 3 is switched on and switched off, namely, one driving protrusion drives the driving arm 51 to rotate forward during grounding switching on, and the other driving protrusion drives the driving arm 51 to rotate reversely during grounding switching off, so that the driving piece can transmit motion and force between the grounding transmission shaft and the driving arm, and the structure is simple, and the matched transmission is reliable.
The specific arrangement of the locking mechanism is described in detail below in conjunction with fig. 3-6:
the locking mechanism 6 comprises a locking rod 61 rotatably mounted on the housing 1, a limit groove 63 for limiting the matching protrusion 50 is formed at one end of the locking rod 61 towards one side of the grounding transmission shaft 3, the limit groove is in a groove structure, and two protrusions are arranged at the end of the limit groove towards the opening end of the cam component; the locking mechanism 6 further comprises a second elastic member 62 arranged between the housing and the locking rod 61, the locking rod 61 rotates towards a position close to the position matched with the matching bulge under the action of the second elastic member 62, and the second elastic member 62 can provide locking acting force when the matching bulge 50 is locked into the limit groove 63, so that locking matching is realized, and the driving arm 51 is kept at the opening position and does not act, so that opening limit effect is achieved on the driving arm; further preferably, in order to release the locking engagement between the driving arm and the locking rod during the closing process, the driving member 31 is provided with an unlocking protrusion which rotates to a set position to drive the locking rod 61 to overcome the elastic force of the second elastic member 62 and reversely rotate to disengage from the locking protrusion 50, and during the grounding closing, the unlocking protrusion of the driving member 31 rotates forward along with the grounding transmission shaft to the unlocking position to push the locking rod 61 to reversely rotate, so that the limiting groove 63 and the locking protrusion 50 are mutually released until disengaged, and the locking device has reasonable design and reliable engagement.
Further preferably, as shown in fig. 6, the driving member 31 is a cam member that rotates with the ground transmission shaft 3, and the cam member includes an arc-shaped protrusion 310, and two ends of the protrusion form a first notch end 311 and a second notch end 312 respectively; specifically, the first notch end 311 and the second notch end 312 are two driving protrusions, and the protrusions between the two ends of the first notch end 311 and the second notch end 312 are unlocking protrusions, that is, the first notch end 311 and the second notch end 312 are formed on two arc length ends of the unlocking protrusions. Through the above structure, when the cam component rotates reversely along with the opening of the grounding transmission shaft 3, the first notch end 311 drives the matching protrusion 50 to be clamped into the limit groove 63 to form locking fit, and when the cam component rotates positively along with the closing of the grounding transmission shaft 3, the locking rod 61 is jacked up by a certain height through the unlocking protrusion to release the locking fit, and then the second notch end 312 drives the matching protrusion 20 to be separated from the limit groove 63 and move to the closing position, at this time, the locking rod 61 is propped against the arc end face of the unlocking protrusion under the action of the second elastic piece, so that the locking fit can be formed by the first notch end driving the matching protrusion and the limit groove in the opening movement process, and the above steps are repeated.
As shown in fig. 2, the disconnecting switch operating device of the present embodiment further includes an intermediate plate 11 mounted on the ground transmission shaft 3 and fixed relative to the housing 1, the locking lever 61 is hinged to the intermediate plate 11 through a rotation shaft, and the second elastic member 62 is a torsion spring sleeved on the rotation shaft, one end of which abuts against the housing 1, and the other end abuts against the locking lever 61. This structural arrangement provides a mounting location for the locking lever and torsion spring which provides a biasing force for the locking lever to lock the engagement projection 50, enhances stability of the engagement, or urges the locking lever 61 against the cam member without a locking engagement.
As a preferred embodiment, the driving arm 51 is provided with pin members penetrating through two side surfaces of the driving arm 51, one end of each pin member, close to the middle clamping plate 11, is slidably disposed in an arc-shaped groove formed in the middle clamping plate 11, the other end, close to the driving member 31, is the matching protrusion 50, one end of each pin member, corresponding to the matching protrusion, moves along the arc-shaped groove, two ends of each arc-shaped groove are respectively a closing position and a separating position where the pin member is located when the pin member moves with the driving arm during closing and separating, and the pin member is locked by a locking rod when reaching one end of the arc-shaped groove corresponding to the separating position, so that impact rebound is avoided during separating.
The following describes the arrangement of the first elastic member in detail with reference to fig. 1 and 3-5:
the utility model discloses a vacuum chamber, including ground connection transmission shaft 3, first elastic component 7, connecting with the eccentric end of rocker arm 30, the eccentric end fixedly connected with of rocker arm 30 first elastic component 7, the other end rotatable coupling of first elastic component 7 in the installation axle that sets up on casing 1, first elastic component 7 is the energy storage spring, in the ground connection closing process, energy storage is carried out when first elastic component 7 is rotated along with the ground connection transmission shaft closing, and be in the energy storage and keep the state constantly during the locking of actuating arm 51 by locking mechanism 6, reach the zero boundary point of release potential energy gradually, in order to satisfy first elastic component and reach maximum energy storage effect when closing, the potential energy is big, when releasing the locking cooperation between locking mechanism and the actuating arm, first elastic component 7 continues to rotate along with the ground connection transmission shaft and release the energy storage, drive the ground connection transmission shaft again and be rotated fast to close in the release energy, improve the closing speed, thereby reach the security that shortens the closing operation time greatly, ensure the ground connection and put out, can make the electric arc extinguish fast.
In this embodiment, as shown in fig. 2, the ground operation shaft 2 is connected to the ground transmission shaft 3 through a gear transmission structure including a first bevel gear 12 provided in linkage on the ground operation shaft 2, and a second bevel gear 13 provided in linkage on the ground transmission shaft 3 and meshed with the first bevel gear 12, and motion and force are transmitted between the ground operation shaft 2 and the ground transmission shaft through a gear transmission. As a specific arrangement mode, the casing 1 is provided with the ground output shaft 4, the transmission mechanism 5 further includes a contact linkage arm 53 rotatably connected to the ground output shaft 4 and linked with the ground contact, and a connecting plate 52 with two ends rotatably connected to the contact linkage arm 53 and the driving arm 51, the driving arm 51 is connected to the ground transmission shaft, as described above, the ground transmission shaft 3 transmits motion and force to the ground output shaft through the transmission mechanism, one end of the ground output shaft 4 is provided with an output crank arm for connecting the ground contact, in the whole transmission process, the ground contact on the output shaft is finally moved to a working position of ground switch-on or switch-off, and in this embodiment, the ground contact is preferably a moving end of the vacuum arc-extinguishing chamber, that is, the moving and static contacts of the vacuum arc-extinguishing chamber are closed or opened.
The working principle of the ground engaging operating mechanism is described below in connection with fig. 3-5:
the opening process of the grounding operation mechanism: the grounding operation shaft 2 drives the grounding transmission shaft 3 to reversely rotate through the gear transmission structure, the first elastic piece 7 is transited from energy storage to energy release in the rotation process of the grounding transmission shaft, and drives the grounding transmission shaft 3 to rapidly rotate through the rocker arm in the energy release state, the driving piece 31 drives the driving arm 51 to rotate along with the brake separating rotation process of the grounding transmission shaft 3, so that the transmission mechanism 5 drives the grounding output shaft 4 to rotate in a brake separating mode, and the grounding output shaft drives the grounding contact to provide required brake separating work and working stroke outwards. When the switching-on state is switched into the switching-off state, the driving piece drives the pin shaft piece on the driving arm to form locking fit with the locking rod so as to keep the limitation of the switching-off position.
And (3) a closing process of the grounding operation mechanism: the grounding operation shaft 2 drives the grounding transmission shaft 3 to rotate positively through a gear transmission structure, the driving arm 51 is locked at the front half of closing and keeps motionless, the driving piece 31 drives the locking rod 61 to unlock the locking fit with the driving arm 51 in the closing rotation process along with the grounding transmission shaft, meanwhile, the first elastic piece 7 transits from energy storage to energy release in the rotation process of the grounding transmission shaft, and drives the grounding transmission shaft 3 to rotate rapidly through the rocker arm in the energy release state, so that the driving mechanism drives the grounding output shaft 4 to perform closing rotation, and the output shaft drives the grounding contact to provide required closing work and working stroke outwards.
The operating device of this embodiment still includes isolation operating mechanism, isolation operating mechanism includes isolation operating shaft 8 and receives isolation transmission shaft 9 of isolation operating shaft 8 drive, isolation transmission shaft 9 with earthing transmission shaft 3 parallel arrangement, for guaranteeing the safe operation of isolator, realizes the mechanical lock between isolator operating mechanism and the isolator operating mechanism, prevents to appear the maloperation between isolator combined floodgate, isolator separating brake and isolator ground three position, isolation transmission shaft 9 with be provided with between earthing transmission shaft 3 in isolation combined floodgate state restriction earthing transmission shaft 3 pivoted first interlocking mechanism, and in earthing combined floodgate state restriction isolation transmission shaft 9 pivoted second interlocking mechanism.
The specific arrangement of the first and second interlock mechanisms is described below in connection with fig. 3-5:
the first interlocking mechanism comprises a first limiting plate 32 fixedly arranged on the grounding transmission shaft 3, and a second limiting plate 91 fixedly arranged on the isolating transmission shaft 9 corresponding to the first limiting plate 32, wherein the second limiting plate 91 is opposite to or propped against the first limiting plate 32 when the isolating transmission shaft 9 is switched on, and the grounding operation mechanism is in a switching-on position as shown in fig. 5, and is limited by the first interlocking mechanism and cannot be switched on. As a specific arrangement, the second interlocking mechanism includes a third limiting plate 54 formed on the driving arm 51, and a fourth limiting plate 92 fixedly disposed on the isolating transmission shaft 9 corresponding to the third limiting plate 54, where the third limiting plate 54 is opposite to or abuts against the fourth limiting plate 92 when the grounding transmission shaft 3 is closed, and the grounding operation mechanism shown in fig. 3 is in a closing position, and at this time, the isolating operation mechanism is limited by the second interlocking mechanism and cannot be closed. According to the structure, the working position of the operating device is ensured to be at the isolating switch-on position or the isolating switch-off position or the grounding position, mechanical locking is realized, the main loop is prevented from being electrified to switch on the grounding knife, the harm caused by misoperation is avoided, and the related regulations of safe operation are met: the grounding switch is required to be separated firstly, and then the isolating switch is closed, so that the isolating switch is prevented from being closed before the grounding switch is not grounded, or the grounding switch is prevented from being closed before the isolating switch is not separated, and the operation safety is ensured.
Example 2
The embodiment provides an isolating switch, which comprises the isolating switch operating device in embodiment 1, so that the isolating switch has all the advantages naturally brought by arranging the isolating switch operating device, the switching among three stations of isolating switch-on, isolating switch-off and grounding switch-on can be realized, the working position is unique, the main loop is prevented from being electrified to switch on a grounding knife, and the harm caused by misoperation is avoided.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (8)
1. The disconnecting switch operating device is characterized by comprising a shell (1) and a grounding operating mechanism arranged on the shell, wherein the grounding operating mechanism comprises a grounding operating shaft (2) arranged on the shell (1), a grounding transmission shaft (3) linked with the grounding operating shaft and a transmission mechanism (5) linked with a grounding contact; the transmission mechanism (5) comprises a driving arm (51) rotatably arranged on the grounding transmission shaft (3); the driving arm (51) rotates forwards or reversely to drive the transmission mechanism (5) to move so as to realize grounding switch-on or grounding switch-off;
the grounding operation mechanism further includes:
a first elastic member (7) provided between the housing (1) and the grounding transmission shaft (3); the first elastic piece (7) stores energy and releases energy in the forward or reverse rotation process of the grounding transmission shaft (3);
the driving piece (31) is arranged on the grounding transmission shaft (3) in a linkage way, and the driving arm (51) is driven to rotate forwards by the driving piece in the process of positively releasing energy storage by the first elastic piece (7); in the process of reversely releasing and storing energy, the driving arm (51) is driven to reversely rotate by the driving piece;
the locking mechanism (6) locks the driving arm (51) after the grounding brake is opened, and the driving piece (31) rotates forward to a set position to unlock the locking mechanism (6) and the driving arm (51) for locking and matching;
the driving piece (31) comprises two driving protrusions which are arranged by taking the grounding transmission shaft (3) as a central axis and setting radian at intervals, the driving arm (51) is provided with a matching protrusion (50) which is matched with the driving protrusion, and the driving arm (51) is driven to rotate around the shaft through the matching of the driving protrusion and the matching protrusion (50) in the process of rotating around the shaft;
the locking mechanism (6) comprises a locking rod (61) rotatably mounted on the shell (1), and a limit groove (63) for limiting the matching protrusion is formed at one end of the locking rod (61) towards one side of the grounding transmission shaft (3); the locking mechanism (6) further comprises a second elastic piece (62) arranged between the shell and the locking rod (61), and the locking rod (61) rotates towards the direction close to the grounding transmission shaft (3) under the action of the second elastic piece (62); an unlocking protrusion which rotates to a set position to drive the locking rod (61) to reversely rotate against the elastic force of the second elastic piece (62) and is separated from the locking of the matching protrusion (50) is arranged on the driving piece (31);
the driving piece (31) is a cam component which rotates along with the grounding transmission shaft (3), the cam component comprises an arc-shaped protruding part (310), and a first notch end (311) and a second notch end (312) are respectively formed at two ends of the protruding part; the first notch end (311) and the second notch end (312) are two driving protrusions, and a protruding part between two ends of the first notch end (311) and the second notch end (312) is the unlocking protrusion;
one end of the grounding transmission shaft (3) is provided with a rocker arm (30), the eccentric end of the rocker arm (30) is fixedly connected with the first elastic piece (7), and the other end of the first elastic piece (7) is rotatably connected with a mounting shaft arranged on the shell (1).
2. The disconnecting switch operating device according to claim 1, characterized in that: the device is characterized by further comprising an intermediate splint (11) which is arranged on the grounding transmission shaft (3) and fixed relative to the shell (1), the locking rod (61) is hinged to the intermediate splint (11) through a rotating shaft, the second elastic piece (62) is a torsion spring sleeved on the rotating shaft, one end of the second elastic piece is propped against the shell (1), and the other end of the second elastic piece is propped against the locking rod (61).
3. The disconnecting switch operating device according to claim 2, characterized in that: the driving arm (51) is provided with a pin shaft piece penetrating through the side surfaces of two sides of the driving arm (51), one end, close to the middle clamping plate (11), of the pin shaft piece is slidably arranged in an arc-shaped groove formed in the middle clamping plate (11), and the other end, close to the driving piece (31), of the pin shaft piece is the matching protrusion (50).
4. The disconnecting switch operating device according to claim 1, characterized in that: the shell (1) is provided with a grounding output shaft (4), the transmission mechanism (5) further comprises a contact linkage arm (53) which is rotatably connected with the grounding output shaft (4) and is in linkage with the grounding contact, and a connecting plate (52) of which the two ends are rotatably connected with the contact linkage arm (53) and the driving arm (51).
5. The disconnecting switch operating device according to any one of claims 1 to 4, characterized in that: the device is characterized by further comprising an isolation operating mechanism, wherein the isolation operating mechanism comprises an isolation operating shaft (8) arranged on the shell (1) and an isolation transmission shaft (9) driven by the isolation operating shaft, the isolation transmission shaft (9) is arranged in parallel with the grounding transmission shaft (3), a first interlocking mechanism which is used for limiting the rotation of the grounding transmission shaft in an isolation closing state and a second interlocking mechanism which is used for limiting the rotation of the isolation transmission shaft in the grounding closing state are arranged between the isolation transmission shaft (9) and the grounding transmission shaft (3).
6. The disconnecting switch operating device according to claim 5, characterized in that: the first interlocking mechanism comprises a first limiting plate (32) fixedly arranged on the grounding transmission shaft (3), and a second limiting plate (91) fixedly arranged on the isolation transmission shaft (9) corresponding to the first limiting plate (32), wherein the second limiting plate (91) is opposite to or propped against the first limiting plate (32) when the isolation transmission shaft (9) is switched on.
7. The disconnecting switch operating device according to claim 5, characterized in that: the second interlocking mechanism comprises a third limiting plate (54) formed on the driving arm (51) and a fourth limiting plate (92) fixedly arranged on the isolating transmission shaft (9) corresponding to the third limiting plate (54), and the third limiting plate (54) is opposite to or propped against the fourth limiting plate (92) when the grounding transmission shaft (3) is switched on.
8. An isolating switch, characterized in that: comprising a disconnector operating device as claimed in any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810387187.3A CN108364819B (en) | 2018-04-26 | 2018-04-26 | Isolating switch operating device and isolating switch with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810387187.3A CN108364819B (en) | 2018-04-26 | 2018-04-26 | Isolating switch operating device and isolating switch with same |
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| CN108364819A CN108364819A (en) | 2018-08-03 |
| CN108364819B true CN108364819B (en) | 2023-11-24 |
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| CN201810387187.3A Active CN108364819B (en) | 2018-04-26 | 2018-04-26 | Isolating switch operating device and isolating switch with same |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109378248B (en) * | 2018-12-10 | 2023-11-28 | 法腾电力装备江苏有限公司 | Three-station isolating switch for forward installation of small high-voltage cabinet |
| CN109585197A (en) * | 2019-01-17 | 2019-04-05 | 科都电气有限公司 | A kind of device for switching operating device |
| CN110189955B (en) * | 2019-06-17 | 2024-01-30 | 浙江奔一新能源有限公司 | Dual-energy-storage operating mechanism of isolating switch |
| CN114220698B (en) * | 2021-05-24 | 2023-06-23 | 嘉兴京硅智能技术有限公司 | Isolating switch mechanism pole |
| CN114256023B (en) * | 2021-11-23 | 2024-03-26 | 北京双杰电气股份有限公司 | Direct-acting type isolated grounding mechanism |
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| CN203871254U (en) * | 2014-05-29 | 2014-10-08 | 厦门兴厦控电气有限公司 | Operating mechanism of three-station isolation switch |
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| CN208111340U (en) * | 2018-04-26 | 2018-11-16 | 浙江华仪电器科技有限公司 | A kind of isolator operation device and the disconnecting switch with it |
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| CN203871254U (en) * | 2014-05-29 | 2014-10-08 | 厦门兴厦控电气有限公司 | Operating mechanism of three-station isolation switch |
| CN205264591U (en) * | 2015-11-30 | 2016-05-25 | 江苏德春电力科技有限公司 | Switch inlet wire operating means |
| CN206789480U (en) * | 2017-03-16 | 2017-12-22 | 温州开元集团有限公司 | A kind of high-voltage vacuum load switch of making switch with ground |
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| CN108364819A (en) | 2018-08-03 |
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