CN110120312B - Low-voltage switchgear divide-shut brake change over switch - Google Patents

Abstract

The invention discloses a switching-on and switching-off switch of a low-voltage switch cabinet, which comprises a reversing mechanism, a third tact switch and a fourth tact switch; the change-over switch comprises a shell, the reversing mechanism comprises a rotating shaft arranged in the shell, and the rotating shaft is arranged on a coil spring; the outer side wall of the rotating shaft is provided with a pressing block, and the third light-touch switch and the fourth light-touch switch are located on a rotating track of the pressing block around the axis of the rotating shaft, so that the third light-touch switch or the fourth light-touch switch can be triggered when the pressing block is located at the starting end or the ending end of the rotating track. By adopting the technical scheme, misoperation of the change-over switch can be prevented.

Description

Low-voltage switchgear divide-shut brake change over switch

The application is a divisional application of a Chinese invention patent with the patent application number of 2018110107145 (application date: 31/08/2018 and the patent name: a low-voltage switch cabinet opening and closing remote control actuating mechanism).

Technical Field

The invention relates to the technical field of distribution automation equipment facilities, in particular to a switching-on and switching-off selector switch of a low-voltage switch cabinet.

Background

With the advance of the third industrial revolution, electricity will occupy an increasingly greater proportion in the energy consumption composition. Due to the scarcity of power transmission resources, the power system has natural monopoly and has a plurality of unique characteristics. The electric power system is one of the most complex man-made industrial network systems in the world. Compared with telecommunication enterprises, the power system has wider coverage and has more access users. The large and small devices and household appliances in various power users are connected to the power grid through various voltage levels. Therefore, the power grid has the potential to have the truest and most extensive data.

Compared with the traditional mass data, the large data has the characteristics of 3V, namely, Variety (data type diversity), Volume (data mass) and Velocity (data processing speed requirement is high). The big data of the power system has not only the "3V" characteristic of the big data, but also other "2V" characteristics: veracity (high accuracy), Value (high Value).

With the improvement of science and technology, the improvement of urbanization and informatization levels and the further promotion of novel urbanization construction, intelligent homes, intelligent buildings, intelligent communities and intelligent cities become development directions in the future, and home-based distributed power generation, electric vehicles, intelligent household appliances and the like are popularized and applied. In the smart grid, the digital equipment of the smart power plant, the smart substation and the smart home has higher integration level and stronger compatibility, so that the data volume generated in the operation process is larger, the data precision is higher, higher requirements are provided for the equipment operation maintenance work, and the mass data processing requirements of the digital equipment in the smart grid cannot be met by the traditional data analysis mode.

A Substation (Substation) is an assembly of devices for switching off or on, changing or regulating voltage, and in an electrical power system, is a collection point for transmission and distribution of electricity. The low-voltage switch cabinet is an indispensable power distribution switch device in a transformer substation and is used for transmission and control of electric energy. Generally, an electric operation button is used to operate a main switchgear equipped in a low-voltage switchgear to perform a switching operation, and for example, a 380V switchgear has a switch button member on a cabinet surface to operate opening and closing of a circuit breaker. The on-off of low-voltage switchgear in present transformer substation is by the station operation and maintenance personnel to the mode of carrying out manual operation to the scene, and this mode needs personnel's professional ability reinforce, is familiar with electric line, and the human cost is higher moreover, and work efficiency is low, and the automation level is low. With the development of distribution automation technology, automation means are introduced into the transformer substation more and more diversified, the aim is to reduce the work content of manpower, save the labor cost, realize the unattended goal of the transformer substation by more scientific and professional automation means, and bring the automation control data of the transformer substation into a data processing system of an intelligent power grid.

Disclosure of Invention

The invention aims to provide a switching-on and switching-off switch of a low-voltage switch cabinet.

Therefore, the switching-on and switching-off switch of the low-voltage switch cabinet comprises the reversing mechanism, the third tact switch and the fourth tact switch; the change-over switch comprises a shell, the reversing mechanism comprises a rotating shaft arranged in the shell, and the rotating shaft is arranged on a coil spring; the outer side wall of the rotating shaft is provided with a pressing block, and the third light-touch switch and the fourth light-touch switch are located on a rotating track of the pressing block around the axis of the rotating shaft, so that the third light-touch switch or the fourth light-touch switch can be triggered when the pressing block is located at the starting end or the ending end of the rotating track.

And the starting end and the terminating end of the rotating track are respectively provided with a stop dog for stopping the pressing block.

One end of the rotating shaft is provided with a through hole extending along the axial direction of the rotating shaft, and the through hole comprises a square hole part with a square section and a round hole part with the diameter smaller than or equal to the side length of the square; a first ratchet part is arranged at one end of the rotating shaft, which is far away from the square hole part, the first ratchet part is propped against a second ratchet part, the second ratchet part is fixed on a square plate, the square plate is propped against a plate spring, and the square plate is positioned in a square sliding groove; the change-over switch also comprises an adjusting rod, one side of the adjusting rod is a square rod part matched with the square hole part, and the other side of the adjusting rod is a round rod part matched with the round hole part.

By adopting the technical scheme, misoperation of the change-over switch can be prevented. When the change-over switch is needed, the square rod part of the adjusting rod is inserted into the square hole part, then the adjusting rod is rotated to enable the rotating shaft to rotate, so that the pressing block is separated from the third light touch switch and extrudes the fourth light touch switch, the square rod part is drawn out after the adjustment is finished, and the second ratchet part enables the first ratchet part not to rotate; when the rotating shaft needs to be rotated, the round rod part of the adjusting rod is inserted into the through hole and penetrates through the round hole part to prop against the square plate to enable the square plate to move backwards, so that the second ratchet part is separated from the first ratchet part, the rotating shaft is rotated under the action of the coil spring, and the pressing block is separated from the fourth tact switch and extrudes the third tact switch.

Drawings

Fig. 1 is a schematic structural diagram of a switching-on and switching-off remote control actuating mechanism of a low-voltage switch cabinet.

Fig. 2 is another angle view of fig. 1.

Fig. 3 is an exploded view of fig. 1.

Fig. 4 is another angle view of fig. 3.

FIG. 5 is a schematic view of the installation of the sleeve, steel column, ram and electromagnet.

FIG. 6 is a schematic view of the installation of the sleeves and steel columns according to the first embodiment.

Fig. 7 is a cut-away schematic view of fig. 6.

FIG. 8 is a schematic view of the steel column and the lift pin.

Fig. 9 is another angle view of fig. 8.

FIG. 10 is a front view of the steel column.

FIG. 11 is a left side view of the steel column.

FIG. 12 is a rear view of the steel column.

FIG. 13 is a right side view of the steel column.

FIG. 14 is a schematic view of the installation of the steel columns and sleeves according to the second embodiment, wherein the sleeves are cut away.

FIG. 15 is a structural schematic view of a steel column in the second embodiment.

Fig. 16 is a schematic view of the installation positions of the protruding portion and the first and second tact switches in the second embodiment.

Fig. 17 is a top view of fig. 16.

Fig. 18 is a schematic structural diagram of the diverter switch.

Fig. 19 is an exploded view of fig. 18.

Fig. 20 is a partially enlarged view of a portion a in fig. 19.

Fig. 21 is a schematic structural view of the rotating shaft, the second ratchet portion, the square plate and the plate spring.

Fig. 22 is a schematic structural view of the adjustment lever.

FIG. 23 is a schematic view of the installation of the ram and guide cylinder.

Fig. 24 is a circuit schematic diagram of the switching-on and switching-off remote control actuating mechanism of the low-voltage switch cabinet.

Detailed Description

The invention is described in further detail below with reference to the figures and the detailed description.

As shown in fig. 1 and 2, the switching-on/off remote control actuator of the low-voltage switch cabinet of the invention comprises a box body 10 and an actuator assembly 20 located in the box body 10. The lower part of the box body 10 is provided with a thread passing hole 101 and a penetrating hole 102 for penetrating out the top rod.

As shown in fig. 3, 4 and 5, the actuator assembly 20 includes an electromagnet 21, a push rod 22 for touching a switch button of the circuit breaker, a steel column 23 located at the upper end of the push rod 22, and a return spring 24 sleeved outside the push rod 22; the top rod 22 is arranged on the axis of the electromagnet 21 and penetrates through the electromagnet 21, the electromagnet 21 can be started under the control of a controller and adsorbs the steel column 23 to move towards the direction close to the electromagnet 21, and the return spring 24 is abutted on the steel column 23 so as to always give a force to the steel column 23 away from the electromagnet 21.

When needing touching circuit breaker shift knob, carry 1 ~ 2 seconds's pulse signal to electro-magnet 21 through long-range controller to make electro-magnet 21 start 1 ~ 2 seconds, after the electro-magnet starts, adsorb steel column 23 and make it drive ejector pin 22 and move to circuit breaker shift knob direction and touch, after the pulse signal, steel column 23 loses the absorption of electro-magnet, thereby reset spring 24 makes steel column 23 reset.

Meanwhile, the low-voltage switch cabinet opening and closing remote control execution mechanism further comprises a first indicator lamp 31, a second indicator lamp 32, a first light touch switch 33 used for controlling the first indicator lamp 31, a second light touch switch 34 used for controlling the second indicator lamp 32 and a linkage mechanism, wherein the linkage mechanism is used for pressing the first light touch switch 33 when the steel column 23 moves downwards to the lowest end of the displacement of the steel column, so that the first indicator lamp 32 is lightened, and is used for pressing the second light touch switch 34 when the steel column 23 moves upwards to the highest end of the displacement of the steel column, so that the second indicator lamp 32 is lightened. The working state of the low-voltage switch cabinet opening and closing remote control execution mechanism can be displayed through the first indicator lamp 31 and the second indicator lamp 32, and when the first indicator lamp 31 or the second indicator lamp 32 is turned on, whether the current low-voltage switch cabinet opening and closing remote control execution mechanism touches a switch button of a circuit breaker can be visually observed.

As a first embodiment, the linkage mechanism includes a sleeve 25 sleeved outside the steel column 23, the upper end surface and the lower end surface of the sleeve 25 are respectively provided with a limiting device for limiting the sleeve 25 to move in the vertical direction, and the limiting device is a planar bearing 250; a guide groove is formed in the outer side wall of the steel column 23, the guide groove includes a first vertical groove 231, a second vertical groove 232, a first oblique groove 233 and a second oblique groove 234, the first vertical groove 231 and the second vertical groove 232 are located on the axial section of the steel column and located on two sides of the axis of the steel column, wherein the first vertical groove 231 is located above the second vertical groove 121, the first oblique groove 233 is connected between the lower end of the first vertical groove 231 and the lower end of the second vertical groove 232, and the second oblique groove 234 is connected between the upper end of the first vertical groove 231 and the upper end of the second vertical groove 232; a projection 251 is arranged on the inner side wall of the sleeve 25, and the projection 251 is inserted into the guide groove and can move along the guide groove; the outer side wall of the sleeve 25 is provided with a protruding portion 252, the first tact switch 33 and the second tact switch 34 are respectively arranged on the left side and the right side of the sleeve 25, and the protruding portion 252 can respectively press the first tact switch 33 and the second tact switch 34 along with the rotation of the sleeve 25.

When the steel column 23 is at the uppermost end of its displacement, the projection 251 is at the upper end of the first vertical slot 231, and the projection 232 presses the second tact switch 34, so that the second indicator light 32 is lighted; when the steel column 23 starts to move down, the projection 251 moves down in the first vertical groove 231 until entering the first diagonal groove 233, and the sleeve 25 starts to rotate; when the steel column 23 moves to the lowest end of the displacement, the bump 251 moves to the lower end of the second vertical groove 232, and the protruding portion 232 presses the first tact switch 33, so that the first indicator light 31 is turned on; when the steel column starts to move upwards, the bump 251 moves upwards in the second vertical groove portion 232 until entering the second inclined groove portion 234, and the sleeve 25 starts to continue rotating in the original rotating direction; when the steel column 23 moves to the uppermost end of its displacement, the protrusion 251 moves to the upper end of the first vertical slot 231, completing one movement cycle. The purpose of providing the first and second vertical groove portions 231, 232 is: when the steel column 23 starts to move downwards or upwards, the projection 251 can smoothly enter the corresponding first oblique groove 233 or second oblique groove 234, so that the steel column 23 always rotates in one direction, and meanwhile, the situation that the steel column 23 continues to rotate due to inertia when moving upwards to the highest position after the electromagnet is turned off is avoided, and the second indicator light 32 is prevented from flickering.

As shown in fig. 23, a spline 221 is provided on the push rod 22, a guide tube 211 for the push rod 22 to pass through is provided inside the electromagnet 21, and a spline groove engaged with the spline 221 is formed on an inner side wall of the guide tube 211.

The first and second tact switches 33 and 34 include a tact button and a spring pressing piece for enabling the tact button to be touched after being pressed by the convex portion 252 and for rebounding and coming off the tact button after being released from the pressing of the convex portion 252.

As shown in fig. 14 to 17, as a second embodiment, the linkage mechanism includes a sleeve 25 sleeved outside the steel column 23, and an upper end surface and a lower end surface of the sleeve 25 are respectively provided with a limiting device for limiting the sleeve 25 to move in a vertical direction; a third groove portion 235 is formed on the outer side wall of the steel column 23, a projection 251 is arranged on the inner side wall of the sleeve 25, and the projection 251 is inserted into the third groove portion 235 and can move along the third groove portion 235; the outer side wall of the sleeve 25 is provided with a protruding portion 252, the first tact switch 33 and the second tact switch 34 are respectively arranged on the outer side of the sleeve 25, and the protruding portion 252 can respectively press the first tact switch 33 and the second tact switch 34 along with the rotation of the sleeve 25.

The arc of the beginning 235a to the ending 235b of the third ramp portion 235 in the circumferential direction of the steel column is α, thereby rotating the protrusion 252 by an angle α. The arc α is less than 60 °, for example preferably equal to 30 °, so that the protruding portion 252 can touch the second tact switch 34 in a short time after disengaging the first tact switch 33.

The low-voltage switch cabinet opening and closing remote control actuating mechanism further comprises a change-over switch 40, as shown in fig. 18, the change-over switch 40 comprises a reversing mechanism, a third tact switch 43 and a fourth tact switch 44, the third tact switch 43 is used for controlling a third indicator lamp 42, the fourth tact switch 44 is used for controlling the on-off of the electromagnet power supply, and the reversing mechanism is used for switching between the third tact switch and the fourth tact switch. The switching-on or switching-off of the remote control function of the switching-on and switching-off remote control execution mechanism of the low-voltage switch cabinet can be realized through the reversing mechanism, and whether the switching-on and switching-off remote control execution mechanism of the low-voltage switch cabinet is in a remote control mode or a manual control mode at present is displayed through the third indicator lamp 42.

The switch 40 comprises a housing 41, the reversing mechanism comprises a rotating shaft 45 arranged in the housing 41, and the rotating shaft 45 is mounted on a coil spring 46; a pressing block 451 is arranged on the outer side wall of the rotating shaft 45, and the third tact switch 43 and the fourth tact switch 44 are positioned on the rotating track of the pressing block 451 around the axis of the rotating shaft 45, so that the third tact switch 43 or the fourth tact switch 44 can be triggered when the pressing block 451 is positioned at the starting end or the ending end of the rotating track.

As shown in fig. 20, stoppers 451a for stopping the pressing pieces 451 are respectively provided at the start end and the end of the rotation trajectory.

A through hole 453 extending along the axial direction of the rotating shaft 45 is formed at one end of the rotating shaft, and the through hole 453 includes a square hole 453a with a square section and a round hole 453b with a diameter smaller than or equal to the side length of the square; a first ratchet part 452 is disposed at an end of the rotating shaft 45 away from the square hole 453a, the first ratchet part 452 abuts against a second ratchet part 461, the second ratchet part 461 is fixed to a square plate 462, the square plate 462 abuts against a leaf spring 47, and the square plate 462 is disposed in a square sliding slot 411; the switch further includes an adjusting lever 48, and one side of the adjusting lever 48 is a square lever portion 481 fitted to the square hole 453a, and the other side is a round lever portion 482 fitted to the round hole 453 b.

The arrangement of the above configuration can prevent the erroneous operation of the changeover switch 40. When the change-over switch 40 is needed, the square rod 481 of the adjusting rod 48 is inserted into the square hole 453a, then the adjusting rod 48 is rotated to rotate the rotating shaft 45, so that the pressing block 451 is separated from the third tact switch 43 and presses the fourth tact switch 44, the square rod 481 is drawn out after the adjustment is finished, and the second ratchet part 461 prevents the first ratchet part 452 from rotating; when it is desired to rotate the rotary shaft 45, the rotary shaft 45 is rotated by the coil spring 46 so that the pressing piece 451 is disengaged from the fourth tact switch 44 and presses the third tact switch 43, using the circular rod portion 482 of the adjustment lever 48 inserted into the through hole 453 and moved backward against the square plate 462 after passing through the circular hole portion 453b, thereby disengaging the second ratchet portion 461 from the first ratchet portion 452.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (1)

1. The utility model provides a low tension switchgear divide-shut brake change over switch which characterized in that: the device comprises a reversing mechanism, a third tact switch and a fourth tact switch; the change-over switch comprises a shell, the reversing mechanism comprises a rotating shaft arranged in the shell, and the rotating shaft is arranged on a coil spring; a pressing block is arranged on the outer side wall of the rotating shaft, and the third tact switch and the fourth tact switch are positioned on a rotating track of the pressing block around the axis of the rotating shaft, so that the third tact switch or the fourth tact switch can be triggered when the pressing block is positioned at the starting end or the ending end of the rotating track; the starting end and the terminating end of the rotating track are respectively provided with a stop block for stopping the pressing block; one end of the rotating shaft is provided with a through hole extending along the axial direction of the rotating shaft, and the through hole comprises a square hole part with a square section and a round hole part with the diameter smaller than or equal to the side length of the square; a first ratchet part is arranged at one end of the rotating shaft, which is far away from the square hole part, the first ratchet part is propped against a second ratchet part, the second ratchet part is fixed on a square plate, the square plate is propped against a plate spring, and the square plate is positioned in a square sliding groove; the change-over switch also comprises an adjusting rod, one side of the adjusting rod is a square rod part matched with the square hole part, and the other side of the adjusting rod is a round rod part matched with the round hole part.

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