CN210805606U - SF6 gas insulation permanent magnet circuit breaker switch cabinet of medium-voltage distribution network - Google Patents

Abstract

An SF6 gas insulated permanent magnet circuit breaker switchgear for medium voltage distribution networks, the switchgear comprising: the cabinet body and switch unit, switch unit set up at the cabinet internally, and switch unit includes permanent magnetism circuit breaker, permanent magnetism circuit breaker includes: the switching-off and switching-on control device comprises a switching-off position permanent magnet, a switching-on and switching-off control coil, a switching-on and switching-off position permanent magnet, an insulating pull rod, a copper bus flexible connection and a vacuum arc extinguish chamber, wherein the switching-on and switching-off control coil is arranged between the switching-on position permanent magnet and the switching-off position permanent magnet, the insulating pull rod is arranged below the switching-on position permanent magnet and connected with the vacuum arc extinguish chamber, the copper bus flexible connection is connected to two sides of the insulating pull rod, the switching-off position permanent magnet and the switching-on position permanent magnet are magnetic and are matched with the switching-on and switching-off control coil after being electrified, attraction and repulsion of the switching-on. The permanent magnet circuit breaker switch cabinet has the advantages that the overall structure is optimized, the service life is prolonged, and the stability is improved.

Description

SF6 gas insulation permanent magnet circuit breaker switch cabinet of medium-voltage distribution network

Technical Field

The utility model relates to a distribution equipment field, concretely relates to SF6 gas insulation permanent magnetism circuit breaker cubical switchboard of middling pressure distribution network.

Background

The outdoor high-voltage vacuum circuit breaker is often used for controlling and protecting electrical equipment of industrial and mining enterprises, power plants and transformer substations, and is suitable for places with frequent operation. As shown in fig. 1, at present, most structures of vacuum permanent magnet circuit breaker switch cabinets include a traditional gas-filled cabinet circuit breaker switch and a permanent magnet operating mechanism, the traditional gas-filled cabinet circuit breaker switch and the permanent magnet operating mechanism mostly adopt a conventional spring operating mechanism and a circuit breaker switch body 25 used in cooperation, the design adopts the circuit breaker switch body used in cooperation with the conventional spring operating mechanism, only the spring operating mechanism is replaced by a permanent magnet operating mechanism 24, under the condition that the circuit breaker switch body is not changed, an energy storage motor and part of mechanical structures of the spring operating mechanism are replaced by a permanent magnet and an electromagnetic coil, the structure is not changed in a breakthrough manner, wherein a permanent magnet module 26 is arranged on the permanent magnet operating mechanism, a manual opening spring 27 is required to be acted firstly in the first half of manual opening operation, and the impact crank arm is driven by the manual opening spring to release energy in the second half of manual opening operation, so that, the circuit breaker can be disconnected only by pulling the mechanism to the opening position through the opening spring 28. The structure has the problems of complex structure, more transmission pairs and low reliability, and partial energy needs to be transmitted to the brake separating spring during closing, so that the volume of the permanent magnet module is increased, the power of the permanent magnet coil is increased, and the volume of a capacitor required by energy storage is increased.

Still have a tradition among the prior art and aerify cabinet circuit breaker switch, overhead permanent magnetism module, the combination scheme of connecting lever rod structure, transmission structure passes through the connecting lever rod and realizes, does not change traditional circuit breaker switch body, and the overhead permanent magnet leads to the high increase of switch body, and then the high increase of cabinet body gas tank, and overall structure installs inside the gas tank, need increase insulation system, cost increase.

Traditional high-pressure vacuum permanent magnetism circuit breaker cubical switchboard, the structure is complicated, security and reliability are than lower, along with the high-speed development of science and technology and economy, can't satisfy mankind to industrial power consumption stability and safety demand.

The utility model provides a SF6 gas insulation permanent magnetism circuit breaker cubical switchboard of middling pressure distribution network has adopted neotype permanent magnetism circuit breaker, all has great promotion on cubical switchboard overall structure optimization, life, maintenance and stability.

SUMMERY OF THE UTILITY MODEL

The utility model provides a SF6 gas insulation permanent magnetism circuit breaker cubical switchboard of middling pressure distribution network adopts neotype permanent magnetism circuit breaker structure, has solved the problem that current cubical switchboard structure is complicated, occupation space is big, life is short and poor stability.

In order to solve the problem, the utility model provides a SF6 gas insulation permanent magnetism circuit breaker cubical switchboard of middling pressure distribution network, include: the cabinet body and switch unit, switch unit set up at the cabinet internally, and switch unit includes permanent magnetism circuit breaker, permanent magnetism circuit breaker includes: the switching-off and switching-on control device comprises a switching-off position permanent magnet, a switching-on and switching-off control coil, a switching-on and switching-off position permanent magnet, an insulating pull rod, a copper bus flexible connection and a vacuum arc extinguish chamber, wherein the switching-on and switching-off control coil is arranged between the switching-on position permanent magnet and the switching-off position permanent magnet, the insulating pull rod is arranged below the switching-on position permanent magnet and connected with the vacuum arc extinguish chamber, the copper bus flexible connection is connected to two sides of the insulating pull rod, the switching-off position permanent magnet and the switching-on position permanent magnet are magnetic and are matched with the switching-on and switching-off control coil after being electrified, attraction and repulsion of the switching-on.

Preferably, the place ahead of the cabinet body is equipped with operating panel and electrified display, be equipped with cable chamber door on the cabinet body of operating panel below, be provided with cable chamber observation window on the cable chamber door.

Preferably, the operation panel is provided with a gas pressure gauge, a primary bus graph, a circuit breaker opening and closing indication, a manual opening and closing operation hole, an energy storage indicator lamp, a circuit breaker closing button, a circuit breaker opening button, an isolation mechanism operation hole, an isolation opening and closing indication, a grounding mechanism operation hole and a grounding opening and closing indication.

Preferably, the switch unit further includes: the system comprises an isolation grounding switch, an inlet and outlet wire sleeve, a bus, a gas box front plate, an explosion-proof flange, an isolation operating mechanism, a gas pressure gauge pipeline, a permanent magnet circuit breaker operating module, a permanent magnet circuit breaker control module and a secondary cable connector; the access sheath includes: the explosion-proof device comprises a lateral European-type sleeve and a bottom European-type sleeve, wherein the bottom European-type sleeve, an isolation operating mechanism, a gas pressure gauge pipeline, a permanent magnetic circuit breaker operating module, a permanent magnetic circuit breaker control module and a secondary cable connector are fixed on one side of a front plate of the gas box, the permanent magnetic circuit breaker is fixed on the other side of the front plate of the gas box, the bottom European-type sleeve is connected with a bus, the other end of the bus is connected with an isolation grounding switch, the isolation operating mechanism is connected with and controls the isolation grounding switch, one end of the gas pressure gauge pipeline is connected with a gas pressure gauge, the other end of the gas pressure gauge pipeline is communicated with the inside of a switch unit, the permanent magnetic circuit breaker operating module is connected with the permanent magnetic circuit breaker control module, the permanent magnetic circuit breaker control module is connected with and controls the permanent magnetic circuit breaker on the other side of, the other end of the cable is connected with a permanent magnetic circuit breaker, and the secondary cable connector is used for a data receiving and transmitting circuit of each component of the switch unit.

Preferably, the switch unit is a sealed box body, 0.02-0.04MPa of sulfur hexafluoride gas is filled into the sealed box body, and the sulfur hexafluoride gas is filled through an inflation valve connected to the sealed box body.

Preferably, the copper busbar flexible connection is connected with a lateral European sleeve.

Preferably, the operation panel is provided with a gas pressure gauge, a primary bus graph, a circuit breaker opening and closing indication, a manual opening and closing operation hole, an energy storage indicator lamp, a circuit breaker closing button, a circuit breaker opening button, an isolation mechanism operation hole, an isolation opening and closing indication, a grounding mechanism operation hole and a grounding opening and closing indication; the circuit breaker is characterized in that the circuit breaker opening and closing indication and the energy storage indicator lamp are connected with the permanent magnet circuit breaker control module, the manual opening and closing operation hole, the circuit breaker closing button and the circuit breaker opening and closing button are connected with the permanent magnet circuit breaker operation module, the isolation operation mechanism is connected with the isolation opening and closing indication through the isolation mechanism operation hole, and the grounding operation mechanism is connected with the grounding opening and closing indication through the grounding mechanism operation hole.

Preferably, the breaker opening and closing indication, the isolation opening and closing indication and the grounding opening and closing indication are indication holes, a marking label is arranged in each hole and is of different colors, the different colors respectively represent closing and opening, and the manual opening operation hole, the isolation mechanism operation hole and the grounding mechanism operation hole are used for inserting the operation handle.

Preferably, the permanent magnet circuit breaker is externally sealed by a sealing shell, the permanent magnet circuit breaker in the sealing shell is in a vacuum state, and the vacuum arc-extinguishing chamber is longitudinally and independently fixedly sealed in the epoxy resin insulating cylinder.

Preferably, the air box front plate is bent for three times, the first time bending is used for supporting the fixing of the switch unit, the second time bending is used for fixing the European-style sleeve at the bottom, the third time bending is used for separating from the cable chamber, and the third time bending is further provided with an explosion-proof flange.

To sum up, the utility model provides a SF6 gas insulation permanent magnetism circuit breaker cubical switchboard of middling pressure distribution network, the cubical switchboard includes: the cabinet body and switch unit, switch unit set up at the cabinet internally, and switch unit includes permanent magnetism circuit breaker, permanent magnetism circuit breaker includes: the switching-off and switching-on control device comprises a switching-off position permanent magnet, a switching-on and switching-off control coil, a switching-on and switching-off position permanent magnet, an insulating pull rod, a copper bus flexible connection and a vacuum arc extinguish chamber, wherein the switching-on and switching-off control coil is arranged between the switching-on position permanent magnet and the switching-off position permanent magnet, the insulating pull rod is arranged below the switching-on position permanent magnet and connected with the vacuum arc extinguish chamber, the copper bus flexible connection is connected to two sides of the insulating pull rod, the switching-off position permanent magnet and the switching-on position permanent magnet are magnetic and are matched with the switching-on and switching-off control coil after being electrified, attraction and repulsion of the switching-on.

The utility model discloses following profitable technological effect has:

1. the utility model discloses a permanent magnet circuit breaker only has an divide-shut brake control coil to move as main moving part at the during operation, because divide-shut brake control coil passes through electric control, carry out the divide-shut brake operation with the electromagnetic force, carry out bistable retention with permanent magnetic force, need not energy storage spring, mechanical semi-axis and mechanical structure such as divide-shut brake pawl, mechanical parts are few, the transmission is vice to be simplified, need not use the relevant supplementary electrical apparatus of mechanical structure, energy consumption and noise reduce, make the holistic simple structure of permanent magnet circuit breaker, long service life, traditional spring operating mechanism and electromagnetic operating mechanism's not enough have been remedied, permanent magnet circuit breaker has realized real non-maintainance, service life becomes more than present more than hundred thousand by original several thousand times.

2. The utility model discloses an outside cover of permanent magnetism circuit breaker has a sealed shell for the permanent magnetism circuit breaker is in vacuum state, and the vacuum interrupter in the permanent magnetism circuit breaker does not leak outward under vacuum state, and the arcing time is short, and the electric arc voltage is low. The performance of the device is not reduced due to the influence of moisture, dust, harmful gas and the like, and the working reliability is greatly improved.

Drawings

FIG. 1 is a schematic diagram of the prior art configuration of a conventional gas-filled tank circuit breaker switch and permanent magnet operating mechanism;

fig. 2 is a schematic structural view of a cabinet of a SF6 gas insulated permanent magnet circuit breaker switchgear of a medium voltage distribution network;

FIG. 3 is a schematic view of the operator panel of FIG. 2;

FIG. 4 is a schematic diagram of the switch unit structure inside FIG. 2;

fig. 5 is a schematic diagram of the permanent magnet circuit breaker of fig. 4;

fig. 6 is an external schematic view of the permanent magnet circuit breaker of fig. 4.

Reference numerals:

1: a cabinet body; 2: a permanent magnet circuit breaker; 3: a brake separating position permanent magnet; 4: a switching-on and switching-off control coil; 5: a switch-on position permanent magnet; 6: an insulating pull rod; 7: flexible connection of copper buses; 8: a vacuum arc-extinguishing chamber; 9: an operation panel; 901: a gas pressure gauge; 902: a primary bus bar graph; 903: switching-on and switching-off indication of the circuit breaker; 904: a manual opening operation hole; 905: an energy storage indicator light; 906: a circuit breaker closing button; 907: a breaker opening button; 908: an isolation mechanism operation hole; 909: isolation opening and closing indication; 910: a grounding mechanism operation hole; 911: grounding switching-on and switching-off indication; 10: a cable chamber door; 11: a cable chamber observation window; 12: an isolation grounding switch; 13: a bus bar; 14: a gas box front plate; 15: an explosion-proof flange; 16: an isolation operating mechanism; 17: a gas pressure gauge line; 18: a permanent magnet circuit breaker operating module; 19: a permanent magnet circuit breaker control module; 20: a secondary cable connector; 21: a lateral European-style sleeve; 22: a bottom European style sleeve; 23: sealing the shell; 24: a permanent magnet operating mechanism; 25: a circuit breaker switch body; 26: a permanent magnet module; 27: a manual brake separating spring; 28: a brake opening spring; 29: a charged display.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 2, the switch cabinet of the SF6 gas-insulated permanent magnet circuit breaker of the medium-voltage distribution network is composed of a sheet metal cabinet body, an operation structure, a switch unit and the like, wherein the cabinet body 1 is made of an aluminum-coated zinc plate with the thickness of 2.0mm, and is subjected to laser cutting sheet metal forming process and surface plastic spraying treatment. The length, width and height of the cabinet body 1 are 770mm × 400mm × 1500mm (without left and right side sealing plates, side outlet sleeves and bottom hoisting structures). The operating mechanism consists of a permanent magnet circuit breaker operating module and a traditional isolation grounding operating mechanism. The switch unit is made of a 304 stainless steel plate with the thickness of 3.0mm, a closed box body made by adopting an argon arc precision welding process is internally provided with a novel permanent magnet circuit breaker switch body, a traditional isolation grounding switch body, an inlet and outlet wire sleeve and the like and is connected by a copper silver-plated bus, and an inflation valve is arranged on the front plate of the box body and is inflated with 0.04MPa SF6 gas.

Be equipped with operating panel 9 and electrified display 29 in the place ahead of the cabinet body 1, whether the electric equipment of the internal 1 of cabinet that shows directly perceived of electrified display 29 has operating voltage's promptness safety device, the internal portion of cabinet is equipped with the switch unit, permanent magnet circuit breaker 2 sets up on the switch unit, be equipped with cable chamber door 10 on the cabinet body 1 of operating device 9 below, place the required cable of cubical switchboard in the cable chamber door 10, can observe the inside condition of cable chamber through cable chamber observation window 11, the cable stretches into the cable chamber from cable chamber bottom, connects in bottom european style sleeve pipe 22, the observation window 11 of cable chamber comprises the metal mesh. The upper part of the cabinet body is provided with lateral European style sleeves 21, the distance between the lateral European style sleeves 21 is 150mm, the distance between the bottom European style sleeves 22 is 107mm, and the height is 660 mm.

Specifically, as shown in fig. 3, the operation panel 9 is provided with a gas pressure gauge 901, a primary bus bar graph 902, a breaker opening and closing indication 903, a manual opening and closing operation hole 904, an energy storage indicator 905, a breaker closing button 906, a breaker opening button 907, an isolation mechanism operation hole 908, an isolation opening and closing indication 909, a grounding mechanism operation hole 910, and a grounding opening and closing indication 911, where the gas pressure gauge 901 is used for displaying the pressure of gas filled in the switch unit.

As shown in fig. 4, the switch unit includes: the system comprises a permanent magnet circuit breaker 2, an isolation grounding switch 12, a wire inlet and outlet sleeve, a bus 13, a gas box front plate 14, an explosion-proof flange 15, an isolation operating mechanism 16, a gas pressure gauge pipeline 17, a permanent magnet circuit breaker operating module 18, a permanent magnet circuit breaker control module 19 and a secondary cable connector 20; the access sheath includes: a lateral European-style sleeve 21 and a bottom European-style sleeve 22, wherein one side of a gas box front plate 14 is fixed with the bottom European-style sleeve 22, an isolation operating mechanism 16, a gas pressure gauge pipeline 17, a permanent magnetic breaker operating module 18, a permanent magnetic breaker control module 19 and a secondary cable connector 20, the other side is fixed with a permanent magnetic breaker 2, the bottom European-style sleeve 22 is connected with a bus 13, the other end of the bus 13 is connected with an isolation grounding switch 12, the isolation operating mechanism 16 is connected with and controls the isolation grounding switch 12, one end of the gas pressure gauge pipeline 17 is connected with a gas pressure gauge 901, the other end is communicated with the inside of a switch unit, the permanent magnetic breaker operating module 18 is connected with the permanent magnetic breaker control module 19, the permanent magnetic breaker control module 19 is connected with and controls the permanent magnetic breaker 2 on the other side of the gas box front plate 14, and the explosion, the lateral European-style pipe sleeve 21 protrudes out of the cabinet body 1, one end of the lateral European-style pipe sleeve is connected with a circuit outside the cabinet body 1, the other end of the lateral European-style pipe sleeve is connected with a copper bus flexible connection 7 of the permanent magnet circuit breaker 1, and the secondary cable connector 20 is used for data receiving and transmitting lines of all components of the switch unit.

The gas tank front plate 14 is bent for three times, the first time bending is used for supporting the fixation of the switch unit, the second time bending is used for fixing the bottom European-type sleeve 22, the third time bending is used for separating from the cable chamber, and the third time bending is further provided with an explosion-proof flange 15.

When the explosion-proof flange 15 breaks down in the sealed box body and leads to air pressure to increase suddenly, an explosion-proof film on the explosion-proof flange 15 can be stressed and deformed to crack, pressure relief is carried out, and the explosion-proof flange is a metal film with the thickness of 0.5 mm.

The permanent magnet circuit breaker operation module 18 can perform switching on and off operations on the permanent magnet circuit breaker 2, instructions sent by the permanent magnet circuit breaker operation module 18 are executed through the permanent magnet circuit breaker control module 19, and the permanent magnet circuit breaker control module 19 controls the working state of the permanent magnet circuit breaker 1.

One end of a gas pressure gauge pipeline 17 is connected with a gas pressure gauge 901, the other end of the gas pressure gauge pipeline is communicated with the inside of the switch unit, whether the pressure of sulfur hexafluoride (SF6) in the switch unit is in a normal range or not is measured, if the pressure is smaller than the normal range, sulfur hexafluoride gas is filled through an inflation valve, and the inflation valve (not marked in the figure) is arranged on the operating mechanism.

The isolation operating mechanism 16 and isolation grounding switch 12 are of conventional type.

Specifically, the switch unit is a sealed box body, sulfur hexafluoride gas is filled in the sealed box body, a pipeline of a gas pressure gauge is communicated with the sealed box body and the gas pressure gauge 901, sulfur hexafluoride gas with rated working air pressure/lowest gas pressure (20 ℃) of 0.04-0.02MPa is filled in the sealed box body, and the sulfur hexafluoride gas is filled in through an inflation valve connected to the sealed box body.

Specifically, the circuit breaker opening and closing indicator 903 and the energy storage indicator 905 are connected with the permanent magnet circuit breaker control module 19, the manual opening and closing operation hole 904, the circuit breaker closing button 906 and the circuit breaker opening and closing button 907 are connected with the permanent magnet circuit breaker operation module 18, the isolation mechanism operation hole 908 and the isolation opening and closing indicator 909 are connected with the isolation operation mechanism 16, and the grounding mechanism operation hole 910 and the grounding opening and closing indicator 911 are connected with the grounding operation mechanism.

Specifically, the breaker opening and closing indication 903, the isolation opening and closing indication 909 and the grounding opening and closing indication 911 are indication holes, a label is arranged in the holes and is in different colors, the different colors respectively represent closing and opening, and the manual opening and closing operation hole 904, the isolation mechanism operation hole 908 and the grounding mechanism operation hole 910 are used for inserting an operation handle.

Specifically, a primary bus bar graph 902 shows a primary wiring circuit diagram among the components in the cabinet 1, and the primary bus bar graph 902 is arranged on the operation panel 9.

As shown in fig. 5 and 6, the permanent magnet circuit breaker 2 includes: the device comprises a brake separating position permanent magnet 3, a brake opening and closing control coil 4, a brake closing position permanent magnet 5, an insulating pull rod 6, a copper bus flexible connection 7 and a vacuum arc extinguish chamber 8, wherein the brake opening and closing control coil 4 is arranged between the brake separating position permanent magnet 3 and the brake closing position permanent magnet 5, the insulating pull rod 6 is arranged below the brake closing position permanent magnet 5, the insulating pull rod 6 is connected with the vacuum arc extinguish chamber 8, and the copper bus flexible connection 7 is connected to two sides of the insulating pull rod 6.

Specifically, the opening position permanent magnet 3 and the closing position permanent magnet 5 are magnetic and are matched with the opening and closing control coil 4 after being electrified, the attraction and the repulsion of the opening and closing control coil 4 are realized through magnetic force, the opening and the closing of the permanent magnet circuit breaker 1 are completed, and the copper bus flexible connection 7 is connected with the lateral surface European-type sleeve 21.

Specifically, the outside of the permanent magnet circuit breaker 1 is sealed by a sealing shell 23, the permanent magnet circuit breaker 1 in the sealing shell 23 is in a vacuum state, and the vacuum arc-extinguishing chamber 8 is longitudinally and independently sealed in an epoxy resin insulating cylinder.

Compared with the prior art, the utility model discloses the outside cover of well permanent magnet circuit breaker 2 has sealed shell 23 for permanent magnet circuit breaker 12 is in vacuum state, and vacuum interrupter 8 in the permanent magnet circuit breaker 2 does not leak outward under vacuum state, and the arcing time is short, and the arc voltage is low. The performance of the device is not reduced due to the influence of moisture, dust, harmful gas and the like, and the working reliability is greatly improved.

The permanent magnet circuit breaker 2 only has one opening and closing control coil 4 as the motion of main moving part at the during operation, because opening and closing control coil 4 passes through electric control, open and close the floodgate operation with the electromagnetic force, carry out bistable state to permanent magnetic force and keep, the transmission is vice to be simplified, energy consumption and noise reduce, need not mechanical structure such as energy storage spring, mechanical semi-axis and opening and closing pawl for permanent magnetism opens circuit, 1 holistic simple structure, long service life has compensatied traditional spring operating device and electromagnetic operating device's not enough. The permanent magnet circuit breaker 1 is lack of mechanical structures such as an energy storage spring, a mechanical half shaft, a switching-on/off catch and the like, so that the number of mechanical parts is small, auxiliary electric appliances related to the mechanical structures are not used, and the real maintenance-free effect is realized. The service life is changed from thousands of times to more than one hundred thousand times at present.

The utility model discloses in adopted permanent magnet (separating brake position permanent magnet and closing brake position permanent magnet) control divide-shut brake control coil 4's structure to save the spring mechanical structure who provides required outside holding power behind the vacuum interrupter contact combined floodgate closure, the holding power after the contact closure is provided to the suction that leans on permanent magnet self, solenoid power is little, permanent magnet circuit breaker 1 vertically independently seals vacuum interrupter 8 in the epoxy insulating cylinder admittedly, has improved anti-creep electrical property and insulating properties.

Compare with traditional circuit breaker, the utility model discloses a permanent magnet circuit breaker 1 has thoroughly changed traditional permanent magnet circuit breaker's structure, through the structural design of innovation, makes the utility model provides a permanent magnet circuit breaker 1 no matter is in mechanical structure or all is far superior to traditional permanent magnet circuit breaker in life.

In summary, the following steps: the utility model relates to a SF6 gas insulation permanent magnetism circuit breaker cubical switchboard of middling pressure distribution network, the cabinet body is by the thick aluminized zinc plate preparation of 2.0mm, the surface plastic-blasting, the size of length width height is 770mm 400mm 1500mm, the internal inside gas that fills of switch unit of cabinet has 0.04 MPa's sulfur hexafluoride, reliability and stability in the guarantee switch unit, the gas pressure gauge of sulfur hexafluoride through operating device on can reach whether the pressure value is in normal range value, if sulfur hexafluoride (SF6) in the switch unit is gaseous when needing the pressure boost or when decompressing through the inflation valve control on the operating device. The inflation valve (not labeled in the figure) is arranged on the operating mechanism. The permanent magnet circuit breaker is arranged in the vacuum sealing shell, and the opening and closing control coil is used as a main moving part of the permanent magnet circuit breaker, so that the mechanical structure is simplified. The vacuum arc extinguish chamber is longitudinally and independently fixedly sealed in the epoxy resin insulating cylinder, the creepage capacity is improved, and the service life of the permanent magnet circuit breaker switch cabinet is prolonged by the structures of the permanent magnet circuit breaker and the vacuum arc extinguish chamber. The bus is a copper silver-plated bus, so that the transmission of electric power is guaranteed.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. An SF6 gas insulated permanent magnet circuit breaker switchgear for medium voltage distribution networks, comprising: the cabinet body and switch unit, switch unit set up at the cabinet internally, and switch unit includes permanent magnetism circuit breaker, permanent magnetism circuit breaker includes: the device comprises a brake separating position permanent magnet, a brake opening and closing control coil, a brake closing position permanent magnet, an insulating pull rod, a copper bus flexible connection and a vacuum arc extinguish chamber, wherein the brake opening and closing control coil is arranged between the brake separating position permanent magnet and the brake closing position permanent magnet, the insulating pull rod is arranged below the brake closing position permanent magnet, the insulating pull rod is connected with the vacuum arc extinguish chamber, and two sides of the insulating pull rod are connected with the copper bus flexible connection.

2. The SF6 gas insulated permanent magnet circuit breaker switch cabinet of medium voltage distribution network of claim 1, wherein an operation panel and a live display are disposed in front of the cabinet body, a cable chamber door is disposed on the cabinet body below the operation panel, and a cable chamber observation window is disposed on the cable chamber door.

3. The SF6 gas insulated permanent magnet circuit breaker switch cabinet of medium voltage distribution network of claim 2, wherein the operating panel is provided with a gas pressure gauge, a primary bus bar graph, a circuit breaker opening and closing indication, a manual opening and closing operation hole, an energy storage indicator lamp, a circuit breaker closing button, a circuit breaker opening and closing button, an isolation mechanism operation hole, an isolation opening and closing indication, a grounding mechanism operation hole and a grounding opening and closing indication.

4. SF6 gas insulated permanent magnet circuit breaker switchgear of a medium voltage distribution network according to claim 2, further comprising in the switchgear unit: the system comprises an isolation grounding switch, an inlet and outlet wire sleeve, a bus, a gas box front plate, an explosion-proof flange, an isolation operating mechanism, a gas pressure gauge pipeline, a permanent magnet circuit breaker operating module, a permanent magnet circuit breaker control module and a secondary cable connector; the access sheath includes: the explosion-proof device comprises a lateral European-type sleeve and a bottom European-type sleeve, wherein the bottom European-type sleeve, an isolation operating mechanism, a gas pressure gauge pipeline, a permanent magnetic circuit breaker operating module, a permanent magnetic circuit breaker control module and a secondary cable connector are fixed on one side of a front plate of the gas box, the permanent magnetic circuit breaker is fixed on the other side of the front plate of the gas box, the bottom European-type sleeve is connected with a bus, the other end of the bus is connected with an isolation grounding switch, the isolation operating mechanism is connected with and controls the isolation grounding switch, one end of the gas pressure gauge pipeline is connected with a gas pressure gauge, the other end of the gas pressure gauge pipeline is communicated with the inside of a switch unit, the permanent magnetic circuit breaker operating module is connected with the permanent magnetic circuit breaker control module, the permanent magnetic circuit breaker control module is connected with and controls the permanent magnetic circuit breaker on the other side of, the other end of the cable is connected with a permanent magnetic circuit breaker, and the secondary cable connector is used for a data receiving and transmitting circuit of each component of the switch unit.

5. The SF6 gas insulated permanent magnet circuit breaker switch cabinet of medium voltage distribution network of claim 1, wherein the switch unit is a sealed box filled with 0.02-0.04MPa sulfur hexafluoride gas through an inflation valve connected to the sealed box.

6. SF6 gas insulated permanent magnet circuit breaker cubicle of a medium voltage distribution network, according to claim 4, characterized in that said copper busbar flexible connection is connected to a lateral euro bushing.

7. SF6 gas insulated permanent magnet circuit breaker cubicle of a medium voltage distribution network according to claim 4, characterized in that: the operating panel is provided with a gas pressure gauge, a primary bus bar graph, a circuit breaker opening and closing indication, a manual opening and closing operation hole, an energy storage indicator lamp, a circuit breaker closing button, a circuit breaker opening button, an isolation mechanism operation hole, an isolation opening and closing indication, a grounding mechanism operation hole and a grounding opening and closing indication; the circuit breaker is characterized in that the circuit breaker opening and closing indication and the energy storage indicator lamp are connected with the permanent magnet circuit breaker control module, the manual opening and closing operation hole, the circuit breaker closing button and the circuit breaker opening and closing button are connected with the permanent magnet circuit breaker operation module, the isolation operation mechanism is connected with the isolation opening and closing indication through the isolation mechanism operation hole, and the grounding operation mechanism is connected with the grounding opening and closing indication through the grounding mechanism operation hole.

8. The SF6 gas insulated permanent magnet circuit breaker switch cabinet of medium voltage distribution network of claim 3, wherein the circuit breaker open/close indication, isolation open/close indication and ground open/close indication are indication holes, labels are placed in the holes, the labels are different colors, the different colors represent closing and opening respectively, the manual opening operation hole, the isolation mechanism operation hole and the ground mechanism operation hole are used for inserting an operation handle.

9. SF6 gas insulated permanent magnet circuit breaker cubicle of a medium voltage distribution network, according to claim 1, characterized in that the permanent magnet circuit breaker is externally sealed with a hermetic enclosure, the permanent magnet circuit breaker inside the hermetic enclosure is in a vacuum state, said vacuum interrupter chamber is longitudinally and independently sealed inside an epoxy resin insulation cylinder.

10. An SF6 gas insulated permanent magnet circuit breaker switch cabinet for medium voltage distribution networks according to claim 4, wherein the gas box front panel is bent three times, the first bending providing support for the fixation of the switch unit, the second bending for the fixation of the bottom euro-type bushing, the third bending for the separation from the cable compartment, and the third bending further being provided with an explosion proof flange.

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