Electric interlocking mechanism
Technical Field
The invention relates to the technical field of solid insulation ring main units, in particular to an electrical interlocking mechanism.
Background
At present, a solid insulation ring main unit gradually develops towards miniaturization, compounding and intellectualization, an isolating switch and a grounding switch are compounded into a three-station isolating-grounding switch, in order to reduce the size, the isolating switch adopts a three-station vacuum arc-extinguishing chamber, and a switch moving contact of the three-station vacuum arc-extinguishing chamber realizes the operation at three stations of closing, opening and grounding in a linear motion mode; and the three-position vacuum arc-extinguishing chamber is usually used for combined electrical equipment and needs to be electrically interlocked with other switching equipment (such as a circuit breaker mechanism).
Referring to fig. 1, fig. 1 is a schematic structural diagram of a typical solid insulating ring main unit.
As shown in fig. 1, the solid insulation ring main unit includes a circuit breaker 20 and a disconnecting switch 10, wherein the circuit breaker 20 employs a two-position vacuum arc-extinguishing chamber, the disconnecting switch 10 employs a three-position vacuum arc-extinguishing chamber, the two-position vacuum arc-extinguishing chamber is operated by a two-position mechanism 40, and the three-position vacuum arc-extinguishing chamber is operated by a three-position switch operating mechanism 30.
As shown in fig. 2 and 3, the three-position switch operating mechanism 30 includes an operating mechanism and a three-position actuator 6, wherein the operating mechanism includes an isolating rotating shaft 1, a grounding rotating shaft 2, a first gear mechanism 4, a transmission shaft 3, and a second gear mechanism 5, one end of the isolating rotating shaft 1 and one end of the grounding rotating shaft 2 form an isolating operating end and a grounding operating end respectively, the other end of the isolating rotating shaft 1, the other end of the grounding rotating shaft 2, and one end of the transmission shaft 3 are driven by the first gear mechanism, the other end of the transmission shaft 3 is connected with a center of a driving gear 51 of the second gear mechanism, and a center of a driven gear 52 of the second gear mechanism is connected with the three-position actuator 6 by a connecting shaft 60.
As shown in fig. 4 and 5, the three-position actuator 6 includes a cam 61 and a connecting rod 62, and both ends of the connecting shaft are supported on the frame; the cam 61 is provided with a cam chute which comprises a first arc-shaped chute, a second arc-shaped chute and a third arc-shaped chute which are communicated in sequence and have different arc radiuses; the upper end of the connecting rod 62 is provided with a shaft pin 64, the shaft pin 64 is movably connected in the cam chute, and the lower end of the connecting rod 62 is provided with a plurality of isolating switch moving contact connecting parts for connecting insulating pull rods of a plurality of isolating switches.
When the isolation rotating shaft 1 rotates 180 degrees anticlockwise, the cam 61 is driven to rotate 120 degrees through the first gear mechanism 4, the transmission shaft 3 and the second gear mechanism 5, and a shaft pin on the connecting rod 62 moves upwards from the lower end in the sliding chute, so that switching from closing to opening of the isolation switch is realized; the grounding rotating shaft 2 rotates 180 degrees clockwise, the cam 61 is driven to rotate 120 degrees through the first gear mechanism 4, the transmission shaft 3 and the second gear mechanism 5, and the connecting rod 62 moves upwards again, so that the switching from the brake opening of the disconnecting switch to the grounding is realized.
To ensure operational flexibility and safety, it is also necessary to electrically interlock the three-position switch operating mechanism 30.
Therefore, how to realize the electrical interlocking of the three-position switch operating mechanism becomes a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide an electric interlocking mechanism to realize electric interlocking of a three-position switch operating mechanism.
In order to achieve the above object, the present invention provides an electrical interlocking mechanism for electrically interlocking a three-position switch operating mechanism, comprising a transmission shaft, a first auxiliary switch, a second auxiliary switch, a grooved wheel, a first slider, a second slider, a first chute, and a second chute; the front side and the back side of the grooved wheel are respectively provided with a sliding groove, each sliding groove comprises two communicated arc sliding grooves with different radiuses, the radian of one arc sliding groove in the two arc sliding grooves is not less than 180 degrees, and the radian of the other arc sliding groove is less than 180 degrees; the first sliding block is clamped in the first sliding groove, the second sliding block is clamped in the second sliding groove, the first sliding groove and the second sliding groove are fixed on the rack, one end of the first sliding block is clamped in the sliding groove on the front side of the grooved wheel through a shaft pin, one end of the second sliding block is clamped in the sliding groove on the back side of the grooved wheel through the shaft pin, the other end of the first sliding block is connected with an operating shaft of the second auxiliary switch through a connecting rod mechanism, and the other end of the second sliding block is connected with the operating shaft of the first auxiliary switch through the connecting rod mechanism; the transmission shaft is fixed with the rotation center of the grooved wheel.
Preferably, the transmission shaft is an isolation rotating shaft of the three-position switch operating mechanism.
Preferably, the operating shaft of the first auxiliary switch is connected to a rotation center of a second indicator of the mechanical interlock mechanism, and the operating shaft of the second auxiliary switch is connected to a rotation center of a first indicator of the mechanical interlock mechanism.
Preferably, the link mechanism comprises a pull rod and a crank arm.
The invention provides an electrical interlocking mechanism which comprises a transmission shaft, a first auxiliary switch, a second auxiliary switch, a grooved wheel, a first sliding block, a second sliding block, a first sliding groove and a second sliding groove, wherein the transmission shaft is specifically an isolation rotating shaft of a three-station switch operating mechanism; the front side and the back side of the grooved wheel are respectively provided with a sliding groove, each sliding groove comprises two communicated arc sliding grooves with different radiuses, the radian of one arc sliding groove in the two arc sliding grooves is not less than 180 degrees, and the radian of the other arc sliding groove is less than 180 degrees; the first sliding block is clamped in the first sliding groove, the second sliding block is clamped in the second sliding groove, the first sliding groove and the second sliding groove are fixed on the rack, one end of the first sliding block is clamped in the sliding groove on the front side of the grooved wheel through a shaft pin, one end of the second sliding block is clamped in the sliding groove on the back side of the grooved wheel through the shaft pin, the other end of the first sliding block is connected with an operating shaft of the second auxiliary switch through a connecting rod mechanism, and the other end of the second sliding block is connected with the operating shaft of the first auxiliary switch through the connecting rod mechanism; the transmission shaft is fixed with the rotation center of the grooved wheel.
When the sliding block is in the starting position, the shaft pin on the first sliding block is positioned at the end part with smaller arc radian in the front sliding groove of the grooved wheel, and the shaft pin on the second sliding block is positioned at the end part with larger arc radian in the back sliding groove of the grooved wheel.
When the disconnecting switch needs to be switched from switching on to switching off, the isolating rotating shaft rotates 180 degrees in an anticlockwise rotating mode, the grooved wheel is driven to rotate 180 degrees in a synchronous anticlockwise rotating mode, the shaft pin on the first sliding block is located at the end part, with the smaller arc radian, of the front sliding groove of the grooved wheel, the grooved wheel pushes the shaft pin on the first sliding block in the sliding groove of the back side of the grooved wheel to move towards the outer side of the grooved wheel, so that the first sliding block slides along the first sliding groove, the first sliding block drives the second auxiliary switch operating shaft to rotate through the connecting rod mechanism, switching of the second auxiliary switch is completed, meanwhile, the shaft pin on the second sliding block is located at the end part, with the larger arc radian, of the back sliding groove of the grooved wheel, the second sliding.
When the disconnecting switch needs to be switched from opening to grounding, the grounding rotating shaft rotates clockwise by 180 degrees, the grounding rotating shaft drives the isolating rotating shaft and the grooved pulley to rotate anticlockwise by 180 degrees through the gear mechanism, the shaft pin on the second sliding block in the groove on the reverse side of the grooved pulley is pushed to move towards the outer side of the grooved pulley, so that the second sliding block slides along the second sliding groove, the operating shaft which drives the first auxiliary switch through the connecting rod mechanism rotates, the switching of the first auxiliary switch is completed, meanwhile, the shaft pin on the first sliding block is already in the groove with the larger arc radian on the front side of the grooved pulley, the first sliding block cannot be moved by the rotation of the grooved pulley, and the state of the second auxiliary switch cannot.
According to the invention, the grooved wheel rotates to drive the first sliding block and the second sliding block to move sequentially, so that the state sequential conversion of the first auxiliary switch and the second auxiliary switch is realized, the pneumatic interlocking of the three-position switch operating mechanism is realized, and the flexibility and the safety of operation are ensured.
Drawings
Fig. 1 is a schematic structural diagram of a typical solid insulating ring main unit;
FIG. 2 is a schematic structural view of the three-position switch operating mechanism of FIG. 1;
FIG. 3 is a schematic structural diagram of the operation device in FIG. 2;
FIG. 4 is a schematic side view of the three-position actuator of FIG. 2;
FIG. 5 is a schematic top view of the three-position actuator of FIG. 2;
fig. 6 is a schematic front view of an electrical interlock mechanism according to the present invention;
FIG. 7 is a schematic top view of the structure of FIG. 6;
fig. 8 is a schematic structural view of a geneva mechanism;
FIG. 9 is a side view of the structure of FIG. 8;
FIG. 10 is a schematic structural view of the front face of the sheave of FIG. 8;
FIG. 11 is a schematic view of the reverse side of the sheave of FIG. 8;
FIG. 12 is a schematic view of the mechanical interlock mechanism;
wherein, in fig. 1-12:
the circuit breaker comprises an isolating switch 10, a circuit breaker 20, a three-position switch operating mechanism 30 and a two-position mechanism 40; the device comprises an isolation rotating shaft 1, a grounding rotating shaft 2, a transmission shaft 3, a first gear mechanism 4, a second gear mechanism 5, a driving gear 51, a driven gear 52, a three-position actuating mechanism 6, a connecting shaft 60, a cam 61 and a connecting rod 62;
the device comprises a rack 100, a first auxiliary switch 101, a second auxiliary switch 102, a grooved wheel 103, a first sliding block 104, a second sliding block 105, a shaft pin 106, a shaft pin 107, a first sliding groove 108, a second sliding groove 109, a crank arm 110 and a connecting rod 111;
the first indicator 202, the first stop pin 221, the second indicator 203, the second stop pin 231 and the baffle 204.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Please refer to fig. 6-9, fig. 6 is a schematic front view of the electrical interlock mechanism provided by the present invention; FIG. 7 is a schematic top view of the structure of FIG. 6; fig. 8 is a schematic structural diagram of the sheave mechanism when the disconnecting switch is in a closing state; fig. 9 is a side view of the structure of fig. 8.
As shown in fig. 6 to 9, the electrical interlocking mechanism provided by the present invention is used for electrically interlocking a three-position switch operating mechanism, and includes a transmission shaft, a first auxiliary switch 101, a second auxiliary switch 102, and a geneva mechanism, where the geneva mechanism includes a geneva wheel 103, a first slider, a second slider, a first sliding groove 108, and a second sliding groove 109, the transmission shaft is specifically an isolation rotating shaft 1 of the three-position switch operating mechanism, the isolation rotating shaft 1 is supported on a frame 100 through a bearing, and the transmission shaft is fixed to a rotation center of the geneva wheel 103.
The front side and the back side of the grooved pulley 103 are both provided with sliding chutes, the sliding chutes respectively comprise two communicated arc sliding chutes with different radiuses, the radian of one arc sliding chute in the two arc sliding chutes is not less than 180 degrees, the radian of the other arc sliding chute is less than 180 degrees, in the specific scheme, the radian of one arc sliding chute is 180 degrees, the radian of the other arc sliding chute is less than 180 degrees, and the two arc sliding chutes are communicated through a transition section; the first chute 108 is fixed on the rack 100, and the second chute 109 is on the rack 100; one end of the first slider 104 is clamped in a sliding groove in the front of the grooved wheel 103 through a shaft pin 106, the shaft pin 106 can slide in the sliding groove in the front, the first slider 104 is clamped in a first sliding groove 108, and the other end of the first slider 104 is connected with an operating shaft of the second auxiliary switch 102 through a link mechanism.
One end of the second sliding block 105 is clamped in the sliding groove on the reverse side of the grooved wheel 103 through a shaft pin 107, the shaft pin 107 can slide in the sliding groove on the reverse side, and the second sliding block 105 is clamped in the second sliding groove 109; the other end of the second slider 105 is connected to the operating shaft of the first auxiliary switch 101 through a link mechanism, in a specific scheme, the link mechanism includes a crank arm 110 and a link 111, one end of the link 111 is connected to the other end of the second slider 105, the other end of the link 111 is connected to one end of the crank arm 110, and the other end of the crank arm 110 is connected to the operating shaft of the first auxiliary switch 101.
The working principle of the sheave mechanism will be described with reference to the accompanying drawings.
Referring to fig. 10 and 11, in the initial position, the axle pin 106 is located at a point a in the front sliding groove of the sheave 103, and the axle pin 107 is located at a point E in the rear sliding groove of the sheave 103; when the isolating rotating shaft 1 drives the sheave 103 to rotate 180 degrees anticlockwise, the shaft pin 106 moves from a point A to a point C of the front sliding groove of the sheave 103, the shaft pin 107 does not move because of being in the same arc, the second sliding block 105 does not move, the shaft pin 106 passes through a transition section from the point A of the front sliding groove of the sheave 103 to the point C, and the first sliding block 104 moves along the first sliding groove 108; after the isolating rotating shaft 1 drives the sheave 103 to rotate 180 degrees, the shaft pin 106 moves from the point C to the point B of the front sliding groove of the sheave 103, the first sliding block 104 does not move, and the shaft pin 107 passes through the transition section from the point F to the point D, and the second sliding block 105 moves along the second sliding groove 109. Namely, in the process that the grooved wheel 103 rotates 360 degrees, the first sliding block 104 moves after the completion of the movement, and then the second sliding block 105 moves, so that sequential actions are realized.
In order to more intuitively describe the working principle of the electric interlocking mechanism provided by the invention, the structure of the three-position switch operating mechanism is combined.
In the initial position, the axle pin 106 of the first sliding block 104 is located at the end of the sliding slot with smaller arc in the front side of the grooved wheel 103, and the axle pin 107 of the second sliding block 105 is located at the end of the sliding slot with larger arc in the back side of the grooved wheel 103.
When the disconnecting switch needs to be switched from closing to opening, the isolating rotating shaft 1 rotates 180 degrees counterclockwise, the grooved wheel 103 is driven to synchronously rotate 180 degrees counterclockwise, because the shaft pin 106 on the first sliding block 104 is located at the end part of the end with the smaller arc radian in the front sliding groove of the grooved wheel 103, the grooved wheel 103 pushes the shaft pin 106 in the front sliding groove of the grooved wheel 103 to move towards the outer side of the grooved wheel 103, the first sliding block 104 slides along the first sliding groove 108, the first sliding block 104 drives the operating shaft of the second auxiliary switch 102 to rotate through the connecting rod mechanism, the switching of the second auxiliary switch 102 is completed, meanwhile, because the shaft pin 107 on the second sliding block 105 is located at the end part of the end with the larger arc radian in the back sliding groove of the grooved wheel 103, the second sliding block 105 cannot be moved by the rotation of the grooved wheel 103.
When the disconnecting switch needs to be switched from opening to grounding, the grounding rotating shaft 2 rotates 180 degrees clockwise, the grounding rotating shaft 2 drives the isolating rotating shaft 1 and the grooved pulley 103 to rotate 180 degrees anticlockwise through the gear mechanism, the shaft pin 107 on the second sliding block 105 in the sliding chute on the reverse side of the grooved pulley 103 is pushed to move towards the outer side of the grooved pulley, so that the second sliding block 105 slides along the second sliding chute 109, the operating shaft of the first auxiliary switch 101 is driven to rotate through the connecting rod mechanism, the switching of the first auxiliary switch 101 is completed, meanwhile, the shaft pin 106 on the first sliding block 104 is already in the sliding chute with the larger arc radian on the front side of the grooved pulley 103, the first sliding block 104 cannot be moved by the rotation of the grooved pulley 103, and the second auxiliary switch cannot be switched.
According to the invention, the grooved pulley 103 rotates to drive the first sliding block 104 and the second sliding block 105 to move sequentially, so that the state sequential conversion of the first auxiliary switch 101 and the second auxiliary switch 102 is realized, the pneumatic interlocking of the three-station switch operating mechanism is realized, and the flexibility and the safety of operation are ensured.
In a preferred embodiment, the operating shaft of the first auxiliary switch 101 is connected to a rotation center of a second indicator of the mechanical interlock mechanism, and the operating shaft of the second auxiliary switch 102 is connected to a rotation center of a first indicator of the mechanical interlock mechanism.
Referring to fig. 12, the mechanical interlock mechanism includes a baffle 204, a first indicator 202, and a second indicator 203, the rotation centers of the first indicator 202 and the second indicator 203 are respectively connected to the operation shaft of the second auxiliary switch 102 and the operation shaft of the first auxiliary switch 101, the baffle 204 is rotatably disposed on the bracket, the baffle 204 is located outside the isolation operation end and the ground operation end, the baffle 204 is used for selectively shielding the isolation operation hole or the ground operation hole, the inner sides of the first indicator 202 and the second indicator 203 are respectively provided with a first stop pin 221 and a second stop pin 231 which can abut against the outer edge of the baffle 204, and the baffle 204 can be located to only shield the isolation operation hole 231 by rotating the first indicator 202 and the second indicator 203, that is, by adjusting the positions of the first stop pin 221 and the second stop pin, And only shielding the grounding operation hole, and simultaneously shielding three positions of the isolation operation hole and the grounding operation hole.
When the isolating switch is in a closing state, the first stop pin 221 on the inner side of the first indicator board 202 is positioned on the upper left of the baffle 204 and stops the baffle 204, the second stop pin 231 on the inner side of the second indicator board 203 is positioned on the lower left of the baffle 204 and cannot abut against the baffle 204, and at the moment, the baffle 204 can only rotate anticlockwise; the baffle 204 is rotated by 180 degrees anticlockwise, the baffle 204 is positioned at a position of only shielding the grounding operation hole, namely, the isolation operation hole at the left side is opened, and the isolation rotating shaft 1 can be operated; the rotating shaft is rotated by 180 degrees in a counterclockwise isolation mode, namely the isolating switch is in a brake-off state, the operating shaft of the second auxiliary switch 102 rotates to drive the first indication board 202 to rotate counterclockwise, the first stop pin 221 moves upwards, and the limit of the baffle 204 is released; the baffle 204 is pushed clockwise to rotate, and due to the limitation release of the first baffle pin 221, the baffle 204 is in a position only shielding the isolation operation hole, namely, the grounding operation hole of the right grounding rotating shaft 2 is opened; the grounding rotating shaft 2 rotates clockwise by 180 degrees, namely, the isolating switch is in a grounding state, the operating shaft of the first auxiliary switch 101 rotates to drive the second indicator 203 to rotate anticlockwise, and the second stop pin 231 moves upwards to the limiting position at the lower left side of the baffle 204; the baffle 204 is rotated anticlockwise, the baffle 204 is positioned at a position for simultaneously shielding the isolation operation hole and the grounding operation hole, and the baffle 204 cannot rotate continuously due to the limit of the second gear pin 231, namely, the isolation rotating shaft 1 cannot be operated in a grounding state, so that the operation interlocking of the three-station operating mechanism is realized.
While there have been described what are considered to be preferred embodiments of the invention, and it is understood that there are no more than a few objectively specified structures that can be derived from the limited language of the specification, and that many modifications and alterations to those structures can be made without departing from the spirit of the invention and these modifications and alterations are to be seen as within the scope of the invention.