CN219534384U - Outdoor phase-control reburnless ultrahigh-voltage vacuum circuit breaker - Google Patents

Abstract

The utility model discloses an outdoor phase-control reburnless ultrahigh-voltage vacuum circuit breaker, which relates to the technical field of vacuum circuit breakers, wherein an energy storage mechanism is arranged as three phases and is respectively and correspondingly arranged under three groups of magnetic sleeves one by one; the switching-on pawl of the three-phase energy storage mechanism is respectively and rotationally linked and matched with the left section, the middle section and the right section of the main shaft, and the main shaft linkage rod of the three-phase energy storage mechanism is respectively connected with the left section, the middle section and the right section of the main shaft; the switching-on sinkers of the three-phase energy storage mechanism are connected in a linkage way through the switching-on synchronous adjusting device, and the switching-on sinkers of the three-phase energy storage mechanism can be synchronously released through the switching-on synchronous adjusting device. In the utility model, independent energy storage mechanisms are respectively arranged under the three groups of magnetic sleeves to provide switching-on and switching-off kinetic energy, so that the main shaft is more scientifically stressed, the output power loss of a single energy storage mechanism is smaller, and the transmission efficiency is higher; the three-phase closing pawl can be synchronously released through the closing synchronous adjusting device, so that the three-phase energy storage mechanism can release kinetic energy simultaneously.

Description

Outdoor phase-control reburnless ultrahigh-voltage vacuum circuit breaker

Technical Field

The utility model relates to the technical field of vacuum circuit breakers, in particular to an outdoor phase-control reburnless ultrahigh-voltage vacuum circuit breaker.

Background

The high-voltage reburnless vacuum circuit breaker is an electric device for opening/closing an electric loop in a power distribution network, and can rapidly and accurately cut off the fault loop when the electric loop breaks down, so that the safe and stable operation of a power line is ensured. The vacuum circuit breaker mainly comprises a lead end, a vacuum arc-extinguishing chamber, a magnetic sleeve, an operating mechanism, a supporting frame and a mounting base. The operating mechanism comprises an operating mechanism box, an energy storage motor, a main shaft, a reduction gearbox, a brake separating spring, a brake closing spring, a brake separating coil, a brake closing coil, a brake separating pawl, a brake closing pawl, an auxiliary switch, a brake separating button, a brake closing button, a main shaft linkage rod and the like. When the vacuum circuit breaker is opened, the current is contracted to a certain point or a certain points when the contacts are just separated at the moment of separating, the current is shown to be severely increased in resistance and temperature between electrodes and is rapidly increased until the evaporation of electrode metal occurs, meanwhile, extremely high electric field intensity is formed, so that intense field emission and breakdown of gaps are caused, vacuum arc is generated, when working current is close to zero, meanwhile, the contact distance is increased, plasma of the vacuum arc is rapidly diffused to the periphery, after the arc current is over zero, a medium of the contact gap is rapidly changed into an insulator from a conductor, and the current is broken at the moment, so that the opening operation is completed.

The existing 126KV ultrahigh-voltage reburnless vacuum circuit breaker is characterized in that the middle section of a main shaft is connected with the main shaft through a main shaft linkage rod, so that when the switching-on and switching-off kinetic energy of the switch is provided, the whole main shaft is unevenly stressed and is easy to bend, the output power loss is high, the touch efficiency is low, and the reliability is poor, so that further optimization of the high-voltage vacuum circuit breaker is urgently required to overcome the defects.

Disclosure of Invention

The utility model aims to provide an outdoor phase-control reburnless ultrahigh voltage vacuum circuit breaker, which can alleviate the problems.

In order to alleviate the problems, the technical scheme adopted by the utility model is as follows:

the utility model provides an outdoor phase-control reburnless ultrahigh-voltage vacuum circuit breaker, which comprises an operating mechanism box, an operating mechanism arranged in the operating mechanism box, three groups of magnetic sleeves arranged in the operating mechanism box, wherein an insulating pull rod, a moving contact, a fixed contact and a vacuum arc-extinguishing chamber are arranged in the magnetic sleeves; the operation mechanism comprises an energy storage mechanism, a main shaft connected with three groups of insulating pull rods, a supporting bearing for rotatably supporting the main shaft, a speed regulating device connected with the main shaft, a brake separating spring connected with the main shaft, a brake separating coil for matching and controlling the brake separating spring to release potential energy, a brake closing coil for matching and controlling the brake closing spring to release potential energy, a kinetic energy absorption limiting device for absorbing the rotational kinetic energy of the main shaft, an overshoot regulating device rotationally matched with the main shaft, an auxiliary switch connected with the brake closing coil and the brake separating coil, a brake separating button which is in linkage matching with the main shaft and is used for manually operating the brake separating, and a brake closing button which is in linkage matching with the brake closing spring and is used for manually operating the brake closing; the energy storage mechanism comprises a reduction gearbox, a closing energy storage rod connected with the reduction gearbox, a closing energy storage crank arm connected with the closing energy storage rod, a closing spring connected with the closing energy storage crank arm, an energy storage motor connected with the reduction gearbox, an energy storage indication part connected with the closing energy storage rod in a linkage manner, a closing pawl matched with the spindle in a rotary linkage manner, and a spindle linkage rod connected with the spindle and used for converting potential energy of the closing spring into rotary kinetic energy of the spindle, wherein the energy storage mechanism is provided with three phases which are respectively and one-to-one corresponding to the three groups of spindle linkage rods arranged under the magnetic sleeves; the switching-on pawls of the three-phase energy storage mechanism are respectively matched with the left section, the middle section and the right section of the main shaft in a rotary linkage manner, and the main shaft linkage rods of the three-phase energy storage mechanism are respectively connected with the left section, the middle section and the right section of the main shaft; the three-phase switching-on mechanism is characterized in that switching-on sinkers of the energy storage mechanism are connected in a linkage manner through a switching-on synchronous adjusting device, and the switching-on sinkers of the energy storage mechanism can be synchronously released through the switching-on synchronous adjusting device.

In a preferred embodiment of the present utility model, the synchronous closing adjusting device includes a bearing bracket fixed to the operating mechanism box, a rotating shaft rotatably mounted to the bearing bracket, a bending plate fixed to the rotating shaft and used for inputting a rotating torque to the rotating shaft, and connecting plates with two ends respectively connected to the rotating shaft and a pull rod of the closing pawl, wherein the connecting plates are extruded by the bending plate to store energy during closing, and after the closing pawl is released, the return spring capable of reversely pushing the bending plate to return is fixed to the operating mechanism box and nested in a screw pin of the return spring.

In a preferred embodiment of the present utility model, there are four brake separating springs, two of which are connected to the middle section of the main shaft, and the other two of which are connected to the left section and the right section of the main shaft, respectively.

In a preferred embodiment of the present utility model, the outer surface of the vacuum arc-extinguishing chamber is a honeycomb casting structure; the upper part of the magnetic sleeve is provided with a wire inlet seat which is electrically connected with the outside; and the middle part of the magnetic sleeve is provided with an outlet seat which is electrically connected with the outside.

In a preferred embodiment of the present utility model, the speed adjusting device includes a third crank arm with one end fixedly connected to the spindle, a damping rod connected to the other end of the third crank arm and penetrating through the operating mechanism box, a cylindrical support fixed on the operating mechanism box, a central through hole arranged in the middle of the cylindrical support and used for the damping rod to penetrate, three groups of installation through holes circumferentially distributed on the side surface of the cylindrical support, and a speed adjusting mechanism arranged in the installation through holes, wherein the installation through holes are communicated with the central through hole, and internal threads are arranged in the installation through holes.

In a preferred embodiment of the utility model, the speed adjusting mechanism comprises a force transmission pin in extrusion contact with the outer surface edge of the damping rod, a pressure spring connected with the force transmission pin, and an adjusting screw connected with the pressure spring and used for adjusting contact pressure, wherein the pressure spring and the adjusting screw are both arranged in the mounting through hole, and the adjusting screw is matched with the internal thread of the mounting through hole.

In a preferred embodiment of the present utility model, the damping rod is provided with a second conical portion, a convex portion and a first conical portion which are matched with the force transmission pin in sequence near one end of the cylindrical support; the other end of the damping rod is provided with a damping head connected with the third crank arm; the damping head is provided with a cylindrical limit column; the third crank arm is provided with a first kidney-shaped hole matched with the limit column.

In a preferred embodiment of the present utility model, the energy absorbing and limiting device includes a cam fixedly connected to the main shaft, an energy absorbing and limiting base fixed to the operating mechanism box, a spring frame installed in the center of the energy absorbing and limiting base, a kinetic energy absorbing spring installed on the spring frame, and an extrusion contact part connected to the kinetic energy absorbing spring and used for rotating and extruding with the cam.

In a preferred embodiment of the present utility model, a micro switch is disposed between the energy storage indication portion and the closing energy storage rod.

Compared with the prior art, the utility model has the beneficial effects that:

the layout of the energy storage mechanism is more scientific and reasonable, independent energy storage mechanisms are respectively arranged under the three groups of magnetic sleeves, and the main shaft linkage rods of the three groups of energy storage mechanisms are respectively connected with the left section, the middle section and the right section of the main shaft to provide switching-on and switching-off kinetic energy, so that the main shaft is more scientifically stressed, the inherent defects of switching caused by unreasonable mechanical properties of single-point power input based on the bending strength of the shaft and the like are avoided, the output power loss of a single energy storage mechanism is smaller, the transmission efficiency is higher, and the switching-on and switching-off reliability after the single-point power input is matched with a vacuum circuit breaker is higher;

the three-phase closing pawl can be synchronously released through the closing synchronous adjusting device, so that the three-phase energy storage mechanism can release kinetic energy for driving the system to safely complete the closing work of the circuit breaker.

In order to make the above objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural view of an operating mechanism.

Fig. 3 is a schematic side view of an operating mechanism.

Fig. 4 is a schematic diagram of a speed regulating device.

Fig. 5 is a schematic side view of the speed governor device at the cylindrical support.

Fig. 6 is a schematic view of a porcelain bushing structure.

Fig. 7 is a schematic diagram of a front view of a synchronous switching-on regulator.

Fig. 8 is a schematic side view of a synchronous switching-on regulator.

Fig. 9 is an optimized diagram of a brake release curve of a 126kV vacuum circuit breaker.

In the above figures, the reference numerals correspond to the component names as follows:

1-mounting base, 2-opening coil, 3-operating mechanism, 4-magnetic sleeve, 5-insulating pull rod, 6-operating mechanism box, 7-main shaft, 8-vacuum arc-extinguishing chamber, 9-opening latch, 10-reduction gearbox, 11-closing energy storage rod, 12-closing spring, 13-energy storage motor, 14-auxiliary switch, 15-opening button, 16-micro switch, 17-energy storage indicator, 18-counter, 19-energy absorption limiting device, 20-overshoot regulating device, 21-speed regulating device, 22-closing coil, 23-closing energy storage crank arm, 24-central through hole, 25-closing pawl, 26-first crank arm, 27-second crank arm, 28-damping rod, 29-supporting bearing, 30-opening and closing indicating part, 31-cylindrical bracket, 32-adjusting screw, 33-pressure spring, 34-force transmission pin, 35-third crank arm, 36-main shaft linkage rod, 37-closing synchronous adjusting device, 371-bearing bracket, 372-rotating shaft, 373-bent plate, 374-connecting plate, 375-pull rod, 376-return spring, 377-screw pin, 378-energy storage buckle plate, 38-cam, 39-opening spring, 40-wire inlet seat and 41-wire outlet seat.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 utility model will be understood in specific cases by those of ordinary skill in the art.

Examples

As shown in fig. 1 to 9, the utility model provides an outdoor phase-control reburnless ultrahigh voltage vacuum circuit breaker, which comprises an operating mechanism box 6, an operating mechanism 3 arranged on the operating mechanism box 6, three groups of magnetic sleeves arranged on the operating mechanism box 6, wherein an insulating pull rod 5, a moving contact, a fixed contact and a vacuum arc extinguishing chamber 8 are arranged in the magnetic sleeves; the operating mechanism 3 comprises an energy storage mechanism, a main shaft 7 connected with three groups of insulating pull rods 5, a supporting bearing 29 for supporting the main shaft 7 in a rotating manner, a speed regulating device 21 connected with the main shaft 7, a brake separating spring 39 connected with the main shaft 7, a brake separating coil 2 for matching and controlling the brake separating spring 39 to release potential energy, a brake closing coil 22 for matching and controlling the brake closing spring 12 to release potential energy, a kinetic energy absorbing limiting device 19 for absorbing the rotational kinetic energy of the main shaft 7, an overshoot regulating device 20 rotationally matched with the main shaft 7, an auxiliary switch 14 connected with the brake closing coil 22 and the brake separating coil 2, a brake separating button 15 which is in linkage matching with the brake separating spring 39 and is used for manually operating the brake separating, and a brake closing button which is in linkage matching with the brake closing spring 12 and is used for manually operating the brake.

In the utility model, the outer surface of the vacuum arc-extinguishing chamber 8 is of a honeycomb pouring structure; the upper part of the magnetic sleeve is provided with a wire inlet seat 40 electrically connected with the outside; the middle part of the magnetic sleeve is provided with an outlet seat 41 electrically connected with the outside. The arc-extinguishing chamber unit adopts an environment-friendly vacuum flexible organic encapsulation process technology, and the breaker has good performances such as condensation resistance, and the environment of a malignant vessel.

In the present utility model, the number of the brake separating springs 39 is four, wherein two brake separating springs 39 are connected to the middle section of the main shaft 7, and the other two brake separating springs 39 are respectively connected to the left section and the right section of the main shaft 7.

The energy storage mechanism comprises a reduction gearbox 10, a closing energy storage rod 11 connected with the reduction gearbox 10, a closing energy storage crank arm 23 connected with the closing energy storage rod 11, a closing spring 12 connected with the closing energy storage crank arm 23, an energy storage motor 13 connected with the reduction gearbox 10, an energy storage indicating part 17 connected with the closing energy storage rod 11 in a linkage manner, a closing pawl 25 matched with the spindle 7 in a rotation linkage manner, and a spindle linkage rod 36 connected with the spindle 7 and used for converting potential energy of the closing spring 12 into rotation kinetic energy of the spindle 7.

In the utility model, the shell of the reduction gearbox 10 is cast aluminum, two sets of worm gears and worms are arranged in the reduction gearbox 10, a closing energy storage rod 11 traverses the reduction gearbox 10 and is not in mechanical connection with the worm gears, a bearing is sleeved on the closing energy storage rod 11, a shaft sleeve of the bearing is connected to the large worm gear by a key, a shaft pin is arranged on the shaft sleeve and is provided with a pawl, the right end of the closing energy storage rod 11 is provided with a cam 38, the cam 38 is provided with a notch, the pawl drives the cam 38 to rotate through the notch, the left end of the closing energy storage rod 11 is provided with a crank, and one end of a closing spring 12 is hung on the crank.

The shaft pin of the reduction gearbox 10 is provided with a triangular lever, the lever is provided with a needle bearing, the cam 38 transmits the energy of the closing spring 12 to the bearing, the other hole of the triangular lever is connected with a connecting rod through the shaft pin, the other end of the connecting rod is arranged on the crank arm of the main shaft 7 to form a four-bar linkage, the closing force is transmitted to the main shaft 7 of the switch through the mechanism, and the shaft pin of the reduction gearbox 10 is also provided with the needle bearing which is used for locking the closing pawl 25.

The crank arm of the switch main shaft 7 is provided with a brake separating spring 39, the main shaft 7 is also provided with an Archimedes spiral limit cam 38 and a pair of crank arms, the limit cam 38 and the damping buffer device work cooperatively to play roles of brake separating limit, kinetic energy absorption and the like, and the crank arm is provided with a needle bearing for locking the brake separating pawl 9.

In order to enable the distribution of the closing rotating force of the main shaft 7 to be more scientific, the energy storage mechanism is arranged into three phases and is respectively arranged under the three groups of magnetic sleeves in a one-to-one correspondence manner; the closing pawl 25 of the three-phase energy storage mechanism is respectively matched with the left section, the middle section and the right section of the main shaft 7 in a rotary linkage manner, and the main shaft linkage rod 36 of the three-phase energy storage mechanism is respectively connected with the left section, the middle section and the right section of the main shaft 7; the closing pawl 25 of the three-phase energy storage mechanism is connected in a linkage way through a closing synchronous adjusting device 37, and the closing pawl 25 of the three-phase energy storage mechanism can be released synchronously through the closing synchronous adjusting device 37.

As shown in fig. 7 and 8, the closing synchronization adjusting device 37 includes a bearing bracket 371 fixed to the operating mechanism box 6, a rotating shaft 372 rotatably mounted to the bearing bracket 371, a bending plate 373 fixed to the rotating shaft 372 and used for inputting a rotating torque to the rotating shaft 372, a connecting plate 375 having both ends respectively connected to a connecting plate 374 of the rotating shaft 372 and a pull rod 378 of the closing pawl 25, and a return spring 376 fixed to the operating mechanism box 6 and nested in the return spring 376, wherein the connecting plate 373 is pressed by the bending plate 373 to store energy during closing, and after the closing pawl 25 is released, the return spring 376 is capable of reversely pushing the bending plate 373 to return.

After the closing electromagnet is electrified, the movable iron core collides with the bent plate 373 under the drive of electromagnetic force to enable the rotating shaft 372 to rotate, the connecting plate 374 is driven to rotate to generate displacement, and meanwhile, the three-phase pull rod 375 and the energy storage buckle plate 378 are pulled to generate position change, so that the energy storage spring of the three-phase energy storage mechanism simultaneously releases energy to generate pulling force, and the main shaft 7 is driven to rotate, so that the closing work is completed. And meanwhile, the return spring 376 stores energy, so that the device returns after the tripping operation is completed, and preparation is made for the next operation.

Independent energy storage mechanisms are respectively arranged under the three groups of magnetic sleeves, and main shaft linkage rods 36 of the three-phase energy storage mechanisms are respectively connected to the left section, the middle section and the right section of the main shaft 7 to provide switching-on and switching-off kinetic energy, so that the main shaft 7 is stressed more scientifically, the inherent defects of a switch caused by unreasonable mechanical properties of single-point power input based on shaft bending strength and the like are avoided, the output power loss of a single energy storage mechanism is smaller, the transmission efficiency is higher, and the switching-on and switching-off reliability after the single-point power input is matched with a vacuum circuit breaker is higher; the three-phase closing pawl 25 can be synchronously released through the closing synchronous adjusting device 37, so that the three-phase energy storage mechanism can release kinetic energy for the driving system to safely complete the closing work of the circuit breaker.

When the motor is used for energy storage, the three-phase energy storage motor 13 is sequentially or simultaneously connected according to the design, the shaft sleeve is driven by the big worm wheel in the reduction gearbox 10 to rotate, the pawl arranged on the shaft sleeve rapidly enters the notch on the cam 38, at the moment, the closing energy storage rod 11 is driven to rotate, and the closing spring 12 is pulled up to store energy.

A micro switch 16 is arranged between the energy storage indicating part 17 and the closing energy storage rod 11. When the closing spring 12 is pulled to the highest point and then locked by the closing pawl 25, a small connecting rod on the crank drives the bent plate 373 to press down the micro switch 16, the motor power supply is cut off, the energy storage indication is displayed in the panel hole, and the whole energy storage time is less than 15s.

When the switch needs to be closed, a switch electromagnet power supply is connected or a switch-on button is pressed by hand, the three-phase switch-on pawl 25 is released under the coordination of the switch-on synchronous adjusting device 37, the switch-on energy storage rod 11 of the three-phase energy storage mechanism rotates anticlockwise under the action of the switch-on spring 12, at the moment, the cam 38 presses on a needle bearing on the triangular lever, the connecting rod on the lever transmits force to the switch main shaft 7 at the same time, and the main shaft 7 drives the insulating pull rod 5 to move upwards. The main shaft 7 is locked by the opening pawl 9 when rotating for about 60 degrees, the switch is closed, the opening springs 39 are sequentially stored with energy while closing, the contact springs arranged on the insulating pull rod 5 are compressed, a pressure is applied to the contacts, and a closing instruction is displayed in a panel hole of the closing instruction part.

When the opening is needed, the opening electromagnet power supply is turned on or the opening button is pressed by hand, the opening pawl 9 is released, the main shaft 7 rotates anticlockwise to the Archimedes spiral limit cam 38 on the main shaft 7 under the action of the opening spring 39 and the contact spring force to spin and press the spring damping buffer device limit block, the circuit breaker is in an opening state, and the opening indication is displayed in the panel hole.

In the present utility model, as shown in fig. 4 and 5, the speed adjusting device 21 includes a third crank arm 35 having one end fixedly connected to the main shaft 7, a damper rod 28 connected to the other end of the third crank arm 35 and penetrating the operating mechanism box 6, a cylindrical bracket 31 fixed to the operating mechanism box 6, a central through hole 24 provided in the middle of the cylindrical bracket 31 for the damper rod 28 to penetrate, three sets of installation through holes circumferentially uniformly distributed on the side of the cylindrical bracket 31, and a speed adjusting mechanism provided in the installation through holes, wherein the installation through holes are communicated with the central through hole 24 and are internally provided with internal threads.

The speed adjusting mechanism comprises a force transmission pin 34 in extrusion contact with the edge of the outer surface of the damping rod 28, a pressure spring 33 connected with the force transmission pin 34, and an adjusting screw 32 connected with the pressure spring 33 and used for adjusting the contact pressure, wherein the pressure spring 33 and the adjusting screw 32 are arranged in the mounting through hole, and the adjusting screw 32 is matched with the internal thread of the mounting through hole.

The damping rod 28 is provided with a second conical part, a convex part and a first conical part which are matched with the force transmission pin 34 in sequence at one end close to the cylindrical bracket 31; the other end of the damping rod 28 is provided with a damping head connected with a third crank arm 35; the damping head is provided with a cylindrical limit column; the third crank arm 35 is provided with a first kidney-shaped hole matched with the limit column.

The speed regulating device 21 can automatically regulate the breaking speed of the moving contact of the vacuum circuit breaker through the strong magnetic region, so that the time is shortened for the long arc formed by breaking between the moving contact and the fixed contact of the circuit breaker in the region, and conditions are created.

In an alternative embodiment of the utility model, the energy absorbing stop 19 comprises a cam 38 fixedly connected to the spindle 7, an energy absorbing stop base fixed to the operating mechanism housing 6, a spring bracket centrally mounted on the energy absorbing stop base, a kinetic energy absorbing spring mounted on the spring bracket, and a compression contact connected to the kinetic energy absorbing spring for rotational compression engagement with the cam 38.

In the utility model, the energy absorption limiting device 19 is used for automatically absorbing the redundant energy of opening and the action of locking and opening reaction force at the later stage of opening the breaker, scientifically absorbing the redundant energy of opening the breaker, greatly reducing the anti-vibration amplitude after opening the breaker, eliminating the rebound and anti-vibration speed of a sensitive section (the defect of general switch design, the system receives the recoil force when just following oil buffering, generates vibration, easily causes charged particles to scatter out, causes reburning breakdown and causes the failure of opening the breaker), improving the internal environment of the opening process of the vacuum breaker, pulling out the temperature bed for reburning generated by the high-voltage electric current of breaking of the vacuum switch, eliminating the operation reburning overvoltage, and providing guarantee for breaking the high-voltage electric current of the vacuum switch and realizing the power failure without reburning.

As shown in figure 9, the opening process of the 126KV reburnless vacuum circuit breaker is divided into three stages, the opening early speed is high, the moving contact can be quickly separated, the contact temperature rise is reduced, the concentration of metal ions with points is reduced, and an early condition is created for reliably breaking high-voltage current; in the middle of the brake separation, the speed is regulated in a reasonable interval, so that the high-voltage arc is reliably contracted and extinguished in the interval; in the later stage of opening, the vacuum insulation strength is gradually recovered along with the increase of the distance, the insulation strength is enhanced, the high-voltage current isolation is realized, the opening action is completed, and the stable power failure is realized. In the later stage of breaking, due to the kinetic energy absorption limiting device 19, the vacuum gap of the movable and static contacts in the arc-extinguishing chamber can be kept in an increased state continuously, and the movement speed and the relative density of dust and the like in the arc-extinguishing chamber are reduced, so that two necessary conditions of vacuum breakdown generated by the vacuum circuit breaker are thoroughly eliminated, the burning speed of the movable and static contacts is greatly slowed down, the service life of the vacuum circuit breaker is greatly prolonged, the breaking and closing performance of the vacuum circuit breaker is more stable and reliable, and the scientific performance of breaking electric energy without reburning of the circuit breaker is realized.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (9)

1. The outdoor phase-control reburnless ultrahigh-voltage vacuum circuit breaker comprises an operating mechanism box, an operating mechanism arranged in the operating mechanism box, three groups of magnetic sleeves arranged in the operating mechanism box, wherein an insulating pull rod, a moving contact, a fixed contact and a vacuum arc-extinguishing chamber are arranged in the magnetic sleeves; the operation mechanism comprises an energy storage mechanism, a main shaft connected with three groups of insulating pull rods, a supporting bearing for rotatably supporting the main shaft, a speed regulating device connected with the main shaft, a brake separating spring connected with the main shaft, a brake separating coil for matching and controlling the brake separating spring to release potential energy, a brake closing coil for matching and controlling the brake closing spring to release potential energy, a kinetic energy absorption limiting device for absorbing the rotational kinetic energy of the main shaft, an overshoot regulating device rotationally matched with the main shaft, an auxiliary switch connected with the brake closing coil and the brake separating coil, a brake separating button which is in linkage matching with the main shaft and is used for manually operating the brake separating, and a brake closing button which is in linkage matching with the brake closing spring and is used for manually operating the brake closing; the energy storage mechanism comprises a reduction gearbox, a closing energy storage rod connected with the reduction gearbox, a closing energy storage crank arm connected with the closing energy storage rod, a closing spring connected with the closing energy storage crank arm, an energy storage motor connected with the reduction gearbox, an energy storage indicating part connected with the closing energy storage rod in linkage, a closing pawl matched with the spindle rotation linkage, and a spindle linkage rod connected with the spindle and used for converting potential energy of the closing spring into spindle rotation kinetic energy, wherein the energy storage mechanism comprises a reduction gearbox, a closing energy storage lever connected with the reduction gearbox, and a spindle linkage rod used for converting potential energy of the closing spring into spindle rotation kinetic energy, and is characterized in that: the energy storage mechanism is provided with three phases which are respectively and correspondingly arranged under the three groups of magnetic sleeves one by one; the switching-on pawls of the three-phase energy storage mechanism are respectively matched with the left section, the middle section and the right section of the main shaft in a rotary linkage manner, and the main shaft linkage rods of the three-phase energy storage mechanism are respectively connected with the left section, the middle section and the right section of the main shaft; the three-phase switching-on mechanism is characterized in that switching-on sinkers of the energy storage mechanism are connected in a linkage manner through a switching-on synchronous adjusting device, and the switching-on sinkers of the energy storage mechanism can be synchronously released through the switching-on synchronous adjusting device.

2. The outdoor phase-control recombustion-free ultrahigh-voltage vacuum circuit breaker according to claim 1, wherein the closing synchronous adjusting device comprises a bearing bracket fixed on the operating mechanism box, a rotating shaft rotatably installed on the bearing bracket, a bent plate fixed on the rotating shaft and used for inputting rotating moment to the rotating shaft, connecting plates with two ends respectively connected with the rotating shaft and a pull rod of a closing pawl, wherein the connecting plates are extruded by the bent plate to store energy in the closing process, and after the closing pawl is released, a return spring capable of reversely pushing the bent plate to return is fixed on the operating mechanism box and nested in a screw pin of the return spring.

3. The outdoor phase-control reburnless ultrahigh voltage vacuum circuit breaker according to claim 1, wherein four brake-separating springs are provided, two brake-separating springs are connected to the middle section of the main shaft, and the other two brake-separating springs are respectively connected to the left section and the right section of the main shaft.

4. The outdoor phase-control reburnless ultrahigh voltage vacuum circuit breaker according to claim 1, wherein the outer surface of the vacuum arc extinguishing chamber is of a honeycomb pouring structure; the upper part of the magnetic sleeve is provided with a wire inlet seat which is electrically connected with the outside; and the middle part of the magnetic sleeve is provided with an outlet seat which is electrically connected with the outside.

5. The outdoor phase-control reburnless ultrahigh voltage vacuum circuit breaker according to claim 1, wherein the speed regulating device comprises a third crank arm, a damping rod, a cylindrical support, three groups of installation through holes and a speed regulating mechanism, wherein one end of the third crank arm is fixedly connected with the main shaft, the damping rod is connected with the other end of the third crank arm and penetrates through the operating mechanism box, the cylindrical support is fixed on the operating mechanism box, the central through holes are arranged in the middle of the cylindrical support and used for the damping rod to penetrate through, three groups of installation through holes are circumferentially and uniformly distributed on the side surface of the cylindrical support, and the speed regulating mechanism is arranged in the installation through holes, wherein the installation through holes are communicated with the central through holes, and internal threads are arranged in the installation through holes.

6. The outdoor phase-control recombustion-free ultrahigh voltage vacuum circuit breaker according to claim 5, wherein the speed adjusting mechanism comprises a force transmission pin in extrusion contact with the outer surface edge of the damping rod, a pressure spring connected with the force transmission pin, and an adjusting screw connected with the pressure spring and used for adjusting contact pressure, wherein the pressure spring and the adjusting screw are both arranged in the mounting through hole, and the adjusting screw is matched with the internal thread of the mounting through hole.

7. The outdoor phase-control reburnless ultrahigh voltage vacuum circuit breaker according to claim 6, wherein the damping rod is provided with a second conical part, a convex part and a first conical part which are matched with the force transmission pin in sequence at one end close to the cylindrical bracket; the other end of the damping rod is provided with a damping head connected with the third crank arm; the damping head is provided with a cylindrical limit column; the third crank arm is provided with a first kidney-shaped hole matched with the limit column.

8. The outdoor phase-control reburnless ultrahigh voltage vacuum circuit breaker according to claim 1, wherein the kinetic energy absorbing limiting device comprises a cam fixedly connected with the main shaft, a kinetic energy absorbing limiting base fixed on the operating mechanism box, a spring frame installed in the center of the kinetic energy absorbing limiting base, a kinetic energy absorbing spring installed on the spring frame, and an extrusion contact part connected with the kinetic energy absorbing spring and used for being matched with the cam in a rotary extrusion mode.

9. The outdoor phase-control reburnless ultrahigh voltage vacuum circuit breaker according to claim 1, wherein a micro switch is arranged between the energy storage indication part and the closing energy storage rod.