CN111952107A - Low-voltage vacuum circuit breaker based on Internet of things - Google Patents

Low-voltage vacuum circuit breaker based on Internet of things Download PDF

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Publication number
CN111952107A
CN111952107A CN202010636758.XA CN202010636758A CN111952107A CN 111952107 A CN111952107 A CN 111952107A CN 202010636758 A CN202010636758 A CN 202010636758A CN 111952107 A CN111952107 A CN 111952107A
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CN
China
Prior art keywords
fixedly connected
guide rod
vacuum
movable end
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010636758.XA
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Chinese (zh)
Inventor
胡超红
高永航
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Huainan Shengju Network Technology Co ltd
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Huainan Shengju Network Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Huainan Shengju Network Technology Co ltd filed Critical Huainan Shengju Network Technology Co ltd
Priority to CN202010636758.XA priority Critical patent/CN111952107A/en
Publication of CN111952107A publication Critical patent/CN111952107A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/662Housings or protective screens
    • H01H33/66207Specific housing details, e.g. sealing, soldering or brazing
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/662Housings or protective screens
    • H01H33/66238Specific bellows details
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/664Contacts; Arc-extinguishing means, e.g. arcing rings
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/666Operating arrangements

Abstract

The invention belongs to the technical field of power equipment, and particularly relates to a low-voltage vacuum circuit breaker based on the Internet of things, which comprises a flat cable shell, a wiring terminal and a vacuum valve, wherein the flat cable shell is provided with a flat cable shell; the flat cable shell is made of an insulating plastic material; the wiring terminal is fixedly connected to the upper end and the lower end of the flat cable shell and used for communicating with a lead in a circuit; a first groove is formed in the flat cable shell; the first groove is positioned at an opening at one side of the flat cable shell; the opening of the first groove is fixedly connected with a sealing plate through a fastening bolt; the bottom of the first groove is fixedly connected with uniformly arranged supporting seats; the supporting seat is designed in an H shape; the vacuum valve is arranged on the upper surface of the supporting seat; the lower surface of the supporting seat is fixedly connected with a lower wiring seat; according to the invention, the vacuum arc extinguish chamber shell and the vacuum valve are in double sleeve joint, and the vacuum valve is filled with high-voltage insulating gas, so that the insulating property between the vacuum circuit breaker and the outside can be effectively enhanced, and the safety of the device is further enhanced.

Description

Low-voltage vacuum circuit breaker based on Internet of things
Technical Field
The invention belongs to the technical field of power equipment, and particularly relates to a low-voltage vacuum circuit breaker based on the Internet of things.
Background
An arc extinguish chamber of the existing vacuum circuit breaker is generally connected with a movable conducting rod at the lower end in a sliding way, an operating mechanism is connected with the movable conducting rod through an insulator to realize linkage, and a movable contact at the upper end of the movable conducting rod is controlled by the operating mechanism to be closed or separated from a fixed contact at the lower end of a static conducting rod at the upper part of the arc extinguish chamber, so that the circuit breaker is switched on and switched off; in order to ensure the vacuum degree in the arc extinguish chamber, a metal corrugated pipe is connected between the movable conducting rod and the lower end part of the arc extinguish chamber, the corrugated pipe contracts when the movable conducting rod is opened downwards, the corrugated pipe extends when the movable conducting rod is closed upwards, and the corrugated pipe is easy to strain to influence the vacuum degree in the arc extinguish chamber in the multiple opening and closing processes, so that the arc extinguish effect is directly influenced, and meanwhile, due to the influence of metal steam in the vacuum arc extinguish chamber, the insulation performance of a shell of the vacuum arc extinguish chamber is gradually reduced along with the lapse of time, so that the safety performance of the vacuum circuit breaker is;
a circuit breaker that china patent issued, patent number: 101553894, comprising two breaking units, namely an arc extinguish chamber, a supporting insulator and a fiber current sensor, wherein the two breaking units and the supporting insulator are detachably connected through a mechanical shell, namely a triple box, the fiber current sensor comprises a fiber current transformer coil, the top of an insulating cylinder of the supporting insulator is provided with an additional flange, namely an upper flange of the supporting insulator, the fiber current transformer coil is arranged in a groove of the additional flange and is positioned inside the supporting insulator, a breaker unit is connected with the mechanical shell in an insulated way, current is transmitted to the additional flange through a bypass connector, namely a guide plate, a cylinder is arranged inside the supporting insulator to realize the current to pass through the inside of the fiber current transformer and further to the mechanical shell and another breaking unit, but the breaker needs to arrange a cylinder inside the supporting insulator to realize the current to pass through the inside of the fiber current transformer, the structure of the circuit breaker is complex, and the cylinder and the optical fiber current induction coil are arranged inside the supporting insulator, so that the electric field and the magnetic field inside the supporting insulator are greatly influenced.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that insulation reduction is easy to occur in the long-term use process of the conventional vacuum circuit breaker and a corrugated pipe is easy to be damaged when the conventional vacuum circuit breaker is blocked by high-voltage insulating gas, the invention provides the low-voltage vacuum circuit breaker based on the Internet of things.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a low-voltage vacuum circuit breaker based on the Internet of things, which comprises a flat cable shell, a wiring terminal and a vacuum valve, wherein the flat cable shell is provided with a flat cable connecting part; the flat cable shell is made of an insulating plastic material; the wiring terminal is fixedly connected to the upper end and the lower end of the flat cable shell and used for communicating with a lead in a circuit; a first groove is formed in the flat cable shell; the first groove is positioned at an opening at one side of the flat cable shell; the opening of the first groove is fixedly connected with a sealing plate through a fastening bolt; the bottom of the first groove is fixedly connected with uniformly arranged supporting seats; the supporting seat is designed in an H shape; the vacuum valve is arranged on the upper surface of the supporting seat; the lower surface of the supporting seat is fixedly connected with a lower wiring seat; the vacuum valve is a cylindrical structure body with openings at the upper end and the lower end; the vacuum valve is filled with high-voltage insulating gas in an initial state; an opening at the top of the vacuum valve is fixedly connected with an insulating pipe; the insulating tube extends to the inside of the vacuum valve; one end of the insulating tube, which is positioned in the vacuum valve, is fixedly connected with a vacuum arc extinguish chamber shell; one end of the insulating tube, which is far away from the vacuum arc extinguish chamber shell, is fixedly connected with an upper wire holder; a static end guide rod is sleeved in the insulating tube; the static end guide rod extends into the vacuum arc extinguish chamber shell; one end of the static end guide rod, which is positioned in the vacuum arc extinguish chamber shell, is fixedly connected with a static contact; one end of the vacuum arc extinguish chamber shell, which is far away from the insulating tube, is fixedly connected with a movable end cover; one end of the movable end cover, which is far away from the vacuum arc extinguish chamber shell, is fixedly connected with a connecting pipe; the connecting pipe extends to the outside of the vacuum valve; the connecting pipe is connected with the vacuum valve in a sealing way; a movable end guide rod is connected in the connecting pipe in a sliding manner; the movable end guide rod penetrates through the movable end cover and extends to the interior of the vacuum arc extinguish chamber shell; the movable end cover is positioned inside the vacuum arc extinguish chamber shell and fixedly connected with a corrugated pipe; the corrugated pipe is connected with the movable end guide rod and is used for sealing the interface of the movable end guide rod and the movable end cover; one end of the movable end guide rod, which is positioned in the vacuum arc extinguish chamber shell, is provided with a movable contact; one end of the movable end guide rod, which is positioned in the connecting pipe, is fixedly connected with a contact seat; the inner wall of the connecting pipe is fixedly connected with a conductive contact finger; a spring pipe is arranged in the connecting pipe; the moving contact extends into the spring tube and is fixedly connected with the spring tube through a nut; a spring is connected in the spring tube; one end of the spring tube, which is far away from the movable end guide rod, is connected with an extrusion head in a sliding manner; one end of the extrusion head, which is far away from the movable end guide rod, is fixedly connected with an electric push rod; the electric push rod is controlled by an internet of things networking signal, and the electric push rod in an extending state in an initial state can extrude the extrusion head and the spring;
the circuit breakers in the prior art are widely applied due to excellent performance, most of the circuit breakers usually adopt sulfur hexafluoride as an electrical insulation and circuit breaking medium, the use of a large amount of sulfur hexafluoride pollutes the environment and is not beneficial to the environmental protection, the arc extinguishing rate of the vacuum circuit breaker is high when the vacuum circuit breaker is used, and no environmental problem is caused when the vacuum circuit breaker is used, but an insulation shell of the vacuum circuit breaker is easily influenced by metal steam evaporated in the internal vacuum environment when the vacuum circuit breaker is used, so that the insulation resistance is reduced, the negative influence of the metal steam is reduced by adopting a shielding tube in the prior art, but the negative influence is still caused, when the vacuum circuit breaker works, a lead in a circuit is connected into the vacuum circuit breaker through a wiring terminal on a flat cable shell, so that the vacuum circuit breaker is conducted with the circuit, a signal is transmitted from a main pivot through the Internet of things, so that an electric push rod is, and further moving the movable end guide rod connected with the spring into the vacuum arc extinguish chamber shell, wherein the movable end push rod at one end of the vacuum arc extinguish chamber shell drives the corrugated pipe to stretch and further isolate the connecting part of the inner cavity of the vacuum arc extinguish chamber shell and the movable end guide rod by the corrugated pipe in the moving process, when the movable end guide rod moves to a certain distance, the movable contact on the movable end guide rod is combined with the static contact on the static end guide rod, so that a circuit is conducted, and the switching-on process is completed, in the using process of the vacuum circuit breaker, metal steam is gradually evaporated from the static contact and the movable contact along with the time lapse due to the influence of the temperature rise of electric arcs between the static contact and the movable contact, and the metal steam is gradually combined with the vacuum arc extinguish chamber shell due to the influence of the sealing performance of the vacuum arc extinguish chamber shell, so that, and fill high-voltage insulating gas in the vacuum valve, can strengthen the insulating properties between vacuum circuit breaker and the external world effectively, and then reinforcing device's security, link firmly the bellows in vacuum interrupter casing simultaneously to connect through connecting pipe and insulating tube in vacuum interrupter casing both ends and keep apart between high-voltage environment and the bellows effectively, and then avoid the bellows to be in high-voltage environment work for a long time effectively, lead to the bellows impaired, make vacuum circuit breaker life extension.
Preferably, one end of the movable end guide rod, which is positioned inside the vacuum arc extinguish chamber shell, is provided with first sliding chutes which are symmetrically designed; the moving contact is connected with the moving end guide rod in a sliding mode through a first sliding groove; one end of the moving contact close to the moving end cover is fixedly connected with a silicon steel ring; the outer side of the connecting pipe is sleeved with an electromagnetic coil; one side of the silicon steel ring, which is far away from the moving contact, is fixedly connected with a permanent magnet ring; a sliding switch is arranged at one end of the flat cable shell, which is far away from the opening of the first groove; the sliding switch controls the electromagnetic coil through an outer wall control circuit;
in the long-term working process, the wall of the corrugated pipe is easily abraded in the process that the corrugated pipe follow-up end guide rod moves up and down, so that the sealing performance of the corrugated pipe is reduced, the sealing performance of a vacuum arc extinguish chamber shell is reduced, external gas enters the vacuum arc extinguish chamber shell, the vacuum environment is damaged, and the arc breakdown voltage is reduced In the process of switching off, the switching-on and switching-off states are controlled by controlling the sliding of the moving contact on the moving end guide rod, the necessity of moving the moving end guide rod is eliminated, the corrugated pipe is prevented from being frequently unfolded or folded, the service life of the corrugated pipe is effectively prolonged, and the sealing performance of a vacuum arc extinguish chamber shell body caused by the damage of the corrugated pipe is prevented from being influenced.
Preferably, a second groove is formed in one side, close to the movable end guide rod, of the movable contact; the second groove is designed annularly; the second groove is fixedly connected with uniformly distributed elastic sheets; the elastic piece is made of a thermal bimetal material; the elastic sheet is obliquely arranged in an initial state; the moving contact is controlled to slide up and down in the first sliding groove by the magnetic field force generated by the electromagnetic coil, because the stability of the magnetic field is insufficient, when the vacuum circuit breaker is influenced by external impact, vibration and the like, the combined static contact and the moving contact are easily separated, and further the circuit state is unstable, when the vacuum circuit breaker works, when the moving contact slides upwards in a normal state, the movement is not influenced due to the inclined arrangement of the elastic sheet, but when the moving contact slides downwards, friction force is formed between the elastic sheet and the moving end guide rod in the sliding process, so that the moving contact slides downwards slowly, when the vacuum circuit breaker in a closing state is influenced by external vibration and impact, the influence of impact force on the moving contact is effectively relieved by the existence of the elastic sheet, further, the displacement probability of the moving contact caused by the external influence is effectively reduced, and simultaneously when the circuit is in, produce electric arc between moving contact and the static contact, and then make the moving contact produce high temperature in the twinkling of an eye, high temperature spreads on the moving contact, and then makes the flexure strip take place deformation, and the flexure strip of deformation is to the inside shrink of second recess, and then makes the moving contact not influenced in the slip that moves on holding the guide arm, and then makes vacuum circuit breaker can break brake fast, and then in time cut-off circuit.
Preferably, one end of the elastic sheet, which is far away from the movable end guide rod, is fixedly connected with a rubber bag; one end of the extrusion head, which is close to the spring tube and is far away from the movable end guide rod, is fixedly connected with an inflatable bag; the inflatable bag and the rubber bag are communicated; the during operation, thereby it causes the electric putter shrink to send as the thing networking signal, make during the movable end push rod shrinks back the connecting pipe, and then separate between movable contact and the static contact, make the circuit disconnection, the extrusion head shrinks in the spring tube this moment, and then make the gas cell receive the compression, with inside gas input rubber bag, and then make the flexure strip in the second recess influenced by the rubber bag and take place deformation, and then make and lock between movable contact and the movable end guide arm, avoid effectively that the movable contact takes place to slide among the vacuum circuit breaker after the thing networking disconnection, and then make and take place the electrostatic breakdown between movable contact and the static contact, thereby cause certain potential safety hazard.
Preferably, the movable end guide rod is positioned above the spring tube and is sleeved with a sliding ring; the sliding ring is made of magnetic materials; one end of the sliding ring, which is close to the movable end guide rod, is fixedly connected with an extrusion bag; a second sliding groove is formed in the first sliding groove; a guide plate is connected in the second sliding chute in a sliding manner; the cross section of the guide plate is designed in a triangular shape, and the inclined plane is designed towards the moving contact; an expansion bag is fixedly connected between the guide plate and the second chute; the expansion bag is communicated with the extrusion bag through a catheter; during operation, through the magnetic field that produces when solenoid circular telegram, and then make the sliding ring slide on moving the end guide arm, and produce the extrusion effect to the expression bag, make the gas input in the expression bag to the inflation bag, and then make the inflation bag deformation extrude the deflector outside the second spout, because the deflector inclined plane sets up the moving contact and slides in first spout, influenced by the deflector and make the moving contact move up the speed and accelerate in first spout gradually, the deflector forms the extrusion to the moving contact simultaneously, and then make and more firm after combining between moving contact and the static contact.
Preferably, the expansion bags are designed in a plurality of ways and are communicated with each other through conical pipes; the opening of the conical tube close to the extrusion bag is smaller than the opening of the conical tube far away from the extrusion bag; during operation, the design of expansion bag complex number, and the design of conical tube between the adjacent expansion bag, the supreme deformation that distributes gradually is down followed in the inflation that makes in the second spout, and then makes the deflector by supreme displacement gradually down, and then avoids causing the influence to the removal of moving contact, and the trend of impact about can also forming simultaneously increases the removal rate of moving contact.
The invention has the following beneficial effects:
1. according to the low-voltage vacuum circuit breaker based on the Internet of things, the vacuum arc extinguish chamber shell and the vacuum valve are in double sleeve joint, and high-voltage insulating gas is filled in the vacuum valve, so that the insulating property between the vacuum circuit breaker and the outside can be effectively enhanced, the safety of the device is further enhanced, the corrugated pipe is fixedly connected in the vacuum arc extinguish chamber shell, the two ends of the vacuum arc extinguish chamber shell are connected through the connecting pipe and the insulating pipe, the high-voltage environment is effectively isolated from the corrugated pipe, the corrugated pipe is effectively prevented from working in the high-voltage environment for a long time, the corrugated pipe is prevented from being damaged, and the service life of the vacuum circuit breaker is prolonged.
2. According to the low-voltage vacuum circuit breaker based on the Internet of things, the sliding of the moving contact on the moving end guide rod is controlled, so that the switching-on and switching-off states are controlled, the necessity of moving the moving end guide rod is eliminated, the corrugated pipe is prevented from being unfolded or folded frequently, the service life of the corrugated pipe is effectively prolonged, and the sealing performance of a vacuum arc extinguish chamber shell caused by damage of the corrugated pipe is prevented from being influenced.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a front view of the present invention;
FIG. 2 is a rear view of the present invention;
FIG. 3 is a partial cross-sectional view of the vacuum valve;
FIG. 4 is a cross-sectional view of the vacuum valve;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a partial enlarged view of FIG. 4 at B;
fig. 7 is a partial sectional view of the movable contact;
in the figure: the vacuum arc extinguishing chamber comprises a flat cable shell 1, a wiring terminal 11, a sealing plate 12, a vacuum valve 2, a supporting seat 21, an insulating tube 22, a vacuum arc extinguishing chamber shell 3, a static end guide rod 31, a movable end cover 32, a connecting tube 33, a movable end guide rod 34, a corrugated tube 35, a movable contact 36, a spring tube 4, an extrusion head 41, an electric push rod 42, an electromagnetic coil 5, a permanent magnetic ring 51, a sliding switch 52, an elastic sheet 6, a rubber bag 61, an air inflation bag 62, a sliding ring 63, an extrusion bag 64, an expansion bag 65 and a guide plate 66.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 7, the low-voltage vacuum circuit breaker based on the internet of things comprises a flat cable housing 1, a wiring terminal 11 and a vacuum valve 2; the flat cable shell 1 is made of an insulating plastic material; the wiring terminals 11 are fixedly connected to the upper end and the lower end of the flat cable shell 1 and are used for communicating with wires in a circuit; a first groove is formed in the flat cable shell 1; the first groove is positioned at an opening at one side of the flat cable shell 1; the opening of the first groove is fixedly connected with a sealing plate 12 through a fastening bolt; the bottom of the first groove is fixedly connected with uniformly arranged supporting seats 21; the support seat 21 is in an H-shaped design; the vacuum valve 2 is arranged on the upper surface of the supporting seat 21; the lower surface of the supporting seat 21 is fixedly connected with a lower wiring seat; the vacuum valve 2 is a cylindrical structure body with openings at the upper end and the lower end; in the initial state, the vacuum valve 2 is filled with high-voltage insulating gas; an insulating pipe 22 is fixedly connected to an opening at the top of the vacuum valve 2; the insulating tube 22 extends to the inside of the vacuum valve 2; one end of the insulating tube 22, which is positioned inside the vacuum valve 2, is fixedly connected with a vacuum arc extinguish chamber shell 3; an upper wire holder is fixedly connected to one end of the insulating tube 22, which is far away from the vacuum arc extinguish chamber shell 3; a static end guide rod 31 is sleeved in the insulating tube 22; the static end guide rod 31 extends into the vacuum arc extinguish chamber shell 3; one end of the static end guide rod 31, which is positioned in the vacuum arc extinguish chamber shell 3, is fixedly connected with a static contact; one end of the vacuum arc extinguish chamber shell 3, which is far away from the insulating tube 22, is fixedly connected with a movable end cover 32; the end cover 32 of the movable end far away from the vacuum arc extinguish chamber shell 3 is fixedly connected with a connecting pipe 33; the connecting pipe 33 extends to the outside of the vacuum valve 2; the connecting pipe 33 is connected with the vacuum valve 2 in a sealing way; a movable end guide rod 34 is connected in the connecting pipe 33 in a sliding manner; the movable end guide rod 34 penetrates through the movable end cover 32 and extends to the interior of the vacuum arc extinguish chamber shell 3; the movable end cover 32 is positioned inside the vacuum arc extinguish chamber shell 3 and fixedly connected with a corrugated pipe 35; the corrugated pipe 35 and the movable end guide rod 34 are connected with each other and used for sealing the interface of the movable end guide rod 34 and the movable end cover 32; one end of the movable end guide rod 34 positioned in the vacuum arc extinguish chamber shell 3 is provided with a movable contact 36; one end of the movable end guide rod 34 positioned in the connecting pipe 33 is fixedly connected with a contact seat; the inner wall of the connecting pipe 33 is fixedly connected with a conductive contact finger; a spring pipe 4 is arranged in the connecting pipe 33; the moving contact 36 extends into the spring tube 4 and is fixedly connected through a nut; a spring is connected in the spring tube 4; one end of the spring tube 4, which is far away from the movable end guide rod 34, is connected with an extrusion head 41 in a sliding manner; one end of the extrusion head 41, which is far away from the movable end guide rod 34, is fixedly connected with an electric push rod 42; the electric push rod 42 is controlled by networking signals of the internet of things, and the electric push rod 42 in an extending state in an initial state plays a role in extruding the extrusion head 41 and the spring;
the circuit breakers in the prior art are widely applied due to excellent performance, most of the circuit breakers usually adopt sulfur hexafluoride as an electrical insulation and circuit breaking medium, the use of a large amount of sulfur hexafluoride pollutes the environment and is not beneficial to the environmental protection, the arc extinguishing rate of the vacuum circuit breaker is high when the vacuum circuit breaker is used, and no environmental problem is caused when the vacuum circuit breaker is used, but an insulation shell of the vacuum circuit breaker is easily influenced by metal steam evaporated in the internal vacuum environment when the vacuum circuit breaker is used, so that the insulation resistance is reduced, the negative influence of the metal steam is reduced by adopting a shielding tube in the prior art, but the negative influence still can be caused, when the vacuum circuit breaker works, a lead in a circuit is connected into the vacuum circuit breaker through a wiring terminal 11 on a flat cable shell 1, so that the vacuum circuit breaker is conducted with the circuit, and a signal is transmitted from a, the electric push rod 42 is in an extending state to make the extrusion head 41 push the spring, so that the movable end guide rod 34 connected with the spring moves towards the vacuum arc extinguish chamber shell 3, the movable end push rod at one end of the vacuum arc extinguish chamber shell 3 drives the corrugated pipe 35 to stretch and further to make the corrugated pipe 35 isolate the connection part of the inner cavity of the vacuum arc extinguish chamber shell 3 and the movable end guide rod 34 in the moving process, when the movable end guide rod 34 moves to a certain distance, the movable contact 36 on the movable end guide rod 34 is combined with the static contact on the static end guide rod 31 to further conduct a circuit, thereby completing the switching-on process, in the using process of the vacuum circuit breaker, due to the influence caused by the temperature rise of an electric arc between the static contact and the movable contact 36, metal steam is gradually evaporated from the static contact and the movable contact 36 along with the time, due to the influence of the sealing performance of the vacuum arc, thereby make 3 insulating properties of vacuum interrupter casing decline, vacuum interrupter casing 3 cup joints with vacuum valve 2 is dual, and fill high-pressure insulating gas in vacuum valve 2 inside, can strengthen the insulating properties between vacuum circuit breaker and the external world effectively, and then reinforcing means's security, link firmly bellows 35 in 3 insides of vacuum interrupter casing simultaneously, and connect through connecting pipe 33 and insulating tube 22 at 3 both ends of vacuum interrupter casing and keep apart between high-voltage environment and bellows 35 effectively, and then avoid bellows 35 to be in high-voltage environment work for a long time effectively, lead to bellows 35 impaired, make vacuum circuit breaker life extension.
As an embodiment of the present invention, one end of the movable end guide rod 34 located inside the vacuum arc extinguish chamber housing 3 is provided with symmetrically designed first sliding chutes; the moving contact 36 is connected with the moving end guide rod 34 in a sliding manner through a first sliding groove; one end of the moving contact 36 close to the moving end cover 32 is fixedly connected with a silicon steel ring; the electromagnetic coil 5 is sleeved on the outer side of the connecting pipe 33; one side of the silicon steel ring, which is far away from the movable contact 36, is fixedly connected with a permanent magnet ring 51; a sliding switch 52 is arranged at one end of the flat cable shell 1 away from the opening of the first groove; the slide switch 52 controls the electromagnetic coil 5 through an outer wall control circuit;
in the long-term working process, in the process that the corrugated pipe 35 moves up and down along with the guide rod 34 at the moving end, the wall of the corrugated pipe 35 is easily abraded, so that the sealing performance of the corrugated pipe 35 is reduced, the sealing performance of the vacuum arc extinguish chamber shell 3 is reduced, further, external gas enters the vacuum arc extinguish chamber shell 3, the vacuum environment is damaged, further, the arc breakdown voltage is reduced, when the vacuum arc extinguish chamber shell works, through the sliding of an external switch, a control circuit is enabled to supply low current to the electromagnetic coil 5, further, the electromagnetic coil 5 is converted into a magnetic field, the magnetic field has influence on the permanent magnet, further, the magnetic field formed by the electromagnetic coil 5 influences the moving contact 36, and the current direction input into the electromagnetic coil 5 is controlled through the external switch, so that the attractive force or repulsive force can be effectively formed on the moving contact 36, further, the moving contact 36 can, and then accomplish the process of closing a floodgate, separating brake, through controlling the moving contact 36 and then controlling the state of closing a floodgate, separating brake on the movable end guide arm 34, saved the necessity that the movable end guide arm 34 moved, and then avoided the frequent stretching or folding of bellows 35, and then prolonged the life of bellows 35 effectively, avoided the damaged vacuum interrupter casing 3 sealing performance who leads to of bellows 35 to receive the influence.
As an embodiment of the present invention, a second groove is formed on one side of the movable contact 36 close to the movable end guide rod 34; the second groove is designed annularly; the second groove is fixedly connected with elastic pieces 6 which are uniformly distributed; the elastic sheet 6 is made of a thermal bimetal material; the elastic sheet 6 is obliquely arranged in an initial state; the movable contact 36 is controlled to slide up and down in the first sliding groove by the magnetic field force generated by the electromagnetic coil 5, because the stability of the magnetic field is insufficient, when the vacuum circuit breaker is influenced by external impact, vibration and the like, the combined fixed contact and the movable contact 36 are easily separated, and further the circuit state is unstable, when the vacuum circuit breaker works, the movable contact 36 slides upwards in a normal state, because the elastic sheet 6 is obliquely arranged, the movement is not influenced, but when the movable contact 36 slides downwards, friction force is formed between the elastic sheet 6 and the movable end guide rod 34 in the sliding process, so that the movable contact 36 slides downwards slowly, when the vacuum circuit breaker in a closing state is influenced by external vibration and impact, the influence of impact force on the movable contact 36 is effectively relieved by the existence of the elastic sheet 6, the probability that the movable contact 36 is influenced by external force to displace is effectively reduced, and when the circuit is in an abnormal state, the electric arc is generated between the moving contact 36 and the static contact, so that the moving contact 36 generates high temperature instantly, the high temperature is diffused on the moving contact 36, and then the elastic sheet 6 is deformed, the deformed elastic sheet 6 contracts towards the inside of the second groove, and then the sliding of the moving contact 36 on the moving end guide rod 34 is not affected, so that the vacuum circuit breaker can be rapidly switched off, and a circuit is cut off in time.
As an embodiment of the invention, one end of the elastic sheet 6, which is far away from the movable end guide rod 34, is fixedly connected with a rubber bag 61; an inflation bag 62 is fixedly connected to one end of the extrusion head 41 close to the spring tube 4 and far away from the movable end guide rod 34; the inflatable bag 62 and the rubber bag 61 are communicated; during operation, thereby cause electric putter 42 to shrink when the thing networking signal sends, make the movable end push rod shrink back in connecting pipe 33, and then separate between movable contact 36 and the static contact, make the circuit disconnection, extrusion head 41 contracts in spring tube 4 this moment, and then make gas cell 62 receive the compression, with inside gas input in the rubber bag 61, and then make the flexure strip 6 in the second recess influenced by rubber bag 61 and take place deformation, and then make and lock between movable contact 36 and the movable end guide arm 34, avoid effectively that the movable contact 36 takes place to slide in the vacuum circuit breaker after the thing networking disconnection, and then make and take place electrostatic breakdown between movable contact 36 and the static contact, thereby cause certain potential safety hazard.
As an embodiment of the present invention, a sliding ring 63 is sleeved on the movable end guide rod 34 above the spring tube 4; the sliding ring 63 is made of a magnetic material; one end of the sliding ring 63, which is close to the movable end guide rod 34, is fixedly connected with a squeezing bag 64; a second sliding groove is formed in the first sliding groove; a guide plate 66 is connected in the second sliding groove in a sliding manner; the cross section of the guide plate 66 is designed to be triangular, and the inclined surface is designed to face the movable contact 36; an expansion bag 65 is fixedly connected between the guide plate 66 and the second sliding groove; the expansion balloon 65 is communicated with the extrusion balloon 64 through a catheter; when the electromagnetic switch works, the sliding ring 63 slides on the moving end guide rod 34 through a magnetic field generated when the electromagnetic coil 5 is electrified, an extrusion effect is generated on the extrusion bag 64, gas in the extrusion bag 64 is input into the expansion bag 65, the expansion bag 65 is deformed to extrude the guide plate 66 out of the second chute, and when the moving contact 36 is arranged on the inclined surface of the guide plate 66 to slide in the first chute, the moving contact 36 is gradually moved upwards in the first chute under the influence of the guide plate 66, and meanwhile, the guide plate 66 extrudes the moving contact 36, so that the moving contact 36 and the fixed contact are combined more firmly.
As an embodiment of the present invention, the expansion bladders 65 are designed in plural and the expansion bladders 65 are communicated with each other through a conical tube; the opening of the conical tube close to the extrusion bag 64 is smaller than the opening of the conical tube far away from the extrusion bag 64; during operation, the design of expansion bag 65 complex number, and the design of conical duct between the adjacent expansion bag 65, the inflation that makes in the second spout distributes deformation gradually from supreme down, and then makes deflector 66 displacement gradually by supreme down, and then avoids causing the influence to the removal of moving contact 36, can also form the trend of impact from top to bottom simultaneously, increases the rate of movement of moving contact 36.
The specific implementation flow is as follows:
when the vacuum circuit breaker works, a wire in a circuit is connected into the vacuum circuit breaker through the wiring terminal 11 on the flat cable shell 1, so that the vacuum circuit breaker is conducted with the circuit, a signal is transmitted from a main pivot of the internet of things control, the electric push rod 42 is in an extending state, so that the extrusion head 41 pushes the spring, and further, the movable end guide rod 34 connected with the spring moves towards the vacuum arc extinguish chamber shell 3, the movable end push rod at one end of the vacuum arc extinguish chamber shell 3 drives the corrugated pipe 35 to stretch, so that the corrugated pipe 35 isolates the connection between the inner cavity of the vacuum arc extinguish chamber shell 3 and the movable end guide rod 34, after the movable end guide rod 34 moves to a certain distance, the movable contact 36 on the movable end guide rod 34 is combined with the static contact on the static end guide rod 31, so that the circuit.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a low pressure vacuum circuit breaker based on thing networking which characterized in that: comprises a flat cable shell (1), a wiring terminal (11) and a vacuum valve (2); the flat cable shell (1) is made of an insulating plastic material; the wiring terminal (11) is fixedly connected to the upper end and the lower end of the flat cable shell (1) and used for communicating with a lead in a circuit; a first groove is formed in the flat cable shell (1); the first groove is positioned at an opening at one side of the flat cable shell (1); a sealing plate (12) is fixedly connected to the opening of the first groove through a fastening bolt; the bottom of the first groove is fixedly connected with uniformly arranged supporting seats (21); the supporting seat (21) is designed in an H shape; the vacuum valve (2) is arranged on the upper surface of the supporting seat (21); the lower surface of the supporting seat (21) is fixedly connected with a lower wiring seat; the vacuum valve (2) is a cylindrical structure body with openings at the upper end and the lower end; in the initial state, high-voltage insulating gas is filled in the vacuum valve (2); an opening at the top of the vacuum valve (2) is fixedly connected with an insulating pipe (22); the insulating tube (22) extends to the inside of the vacuum valve (2); one end of the insulating tube (22) positioned inside the vacuum valve (2) is fixedly connected with a vacuum arc extinguish chamber shell (3); an upper wire holder is fixedly connected to one end, far away from the vacuum arc extinguish chamber shell (3), of the insulating tube (22); a static end guide rod (31) is sleeved in the insulating tube (22); the static end guide rod (31) extends into the vacuum arc extinguish chamber shell (3); one end of the static end guide rod (31) positioned in the vacuum arc extinguish chamber shell (3) is fixedly connected with a static contact; one end of the vacuum arc extinguish chamber shell (3), which is far away from the insulating tube (22), is fixedly connected with a movable end cover (32); one end of the movable end cover (32) far away from the vacuum arc extinguish chamber shell (3) is fixedly connected with a connecting pipe (33); the connecting pipe (33) extends to the outside of the vacuum valve (2); the connecting pipe (33) is connected with the vacuum valve (2) in a sealing way; a movable end guide rod (34) is connected in the connecting pipe (33) in a sliding manner; the movable end guide rod (34) penetrates through the movable end cover (32) and extends into the vacuum arc extinguish chamber shell (3); the movable end cover (32) is positioned inside the vacuum arc extinguish chamber shell (3) and is fixedly connected with a corrugated pipe (35); the corrugated pipe (35) is connected with the movable end guide rod (34) and is used for sealing the interface of the movable end guide rod (34) and the movable end cover (32); one end of the movable end guide rod (34) positioned in the vacuum arc extinguish chamber shell (3) is provided with a movable contact (36); one end of the movable end guide rod (34) positioned in the connecting pipe (33) is fixedly connected with a contact seat; the inner wall of the connecting pipe (33) is fixedly connected with a conductive contact finger; a spring pipe (4) is arranged in the connecting pipe (33); the moving contact (36) extends into the spring tube (4) and is fixedly connected through a nut; a spring is connected in the spring tube (4); one end of the spring tube (4) far away from the movable end guide rod (34) is connected with an extrusion head (41) in a sliding manner; one end of the extrusion head (41) far away from the movable end guide rod (34) is fixedly connected with an electric push rod (42); the electric push rod (42) is controlled by networking signals of the Internet of things, and the electric push rod (42) in an extending state in an initial state extrudes the extrusion head (41) and the spring.
2. Low-voltage vacuum circuit breaker based on the internet of things according to claim 1, characterized in that: one end of the movable end guide rod (34) positioned in the vacuum arc extinguish chamber shell (3) is provided with first sliding chutes which are symmetrically designed; the moving contact (36) is connected with the moving end guide rod (34) in a sliding mode through a first sliding groove; one end of the moving contact (36) close to the moving end cover (32) is fixedly connected with a silicon steel ring; the outer side of the connecting pipe (33) is sleeved with an electromagnetic coil (5); one side of the silicon steel ring, which is far away from the moving contact (36), is fixedly connected with a permanent magnet ring (51); a sliding switch (52) is arranged at one end of the flat cable shell (1) far away from the opening of the first groove; the slide switch (52) controls the electromagnetic coil (5) through an outer wall control circuit.
3. Low-voltage vacuum circuit breaker based on the Internet of things according to claim 2, characterized in that: a second groove is formed in one side, close to the movable end guide rod (34), of the movable contact (36); the second groove is designed annularly; the second groove is fixedly connected with elastic pieces (6) which are uniformly distributed; the elastic piece (6) is made of a thermal bimetal material; the elastic piece (6) is obliquely arranged in an initial state.
4. Low-voltage vacuum circuit breaker based on the Internet of things according to claim 3, characterized in that: one end of the elastic sheet (6) far away from the movable end guide rod (34) is fixedly connected with a rubber bag (61); one end of the extrusion head (41), which is close to the spring tube (4) and is far away from the movable end guide rod (34), is fixedly connected with an inflatable bag (62); the inflatable bag (62) and the rubber bag (61) are in a conduction design.
5. Low-voltage vacuum circuit breaker based on the internet of things according to claim 1, characterized in that: the movable end guide rod (34) is positioned above the spring tube (4) and is sleeved with a sliding ring (63); the sliding ring (63) is made of magnetic materials; one end of the sliding ring (63) close to the movable end guide rod (34) is fixedly connected with a squeezing bag (64); a second sliding groove is formed in the first sliding groove; a guide plate (66) is connected in the second sliding groove in a sliding manner; the cross section of the guide plate (66) is designed to be triangular, and the inclined surface is designed to face the moving contact (36); an expansion bag (65) is fixedly connected between the guide plate (66) and the second sliding groove; the expansion bag (65) is communicated with the extrusion bag (64) through a catheter.
6. Low-voltage vacuum circuit breaker based on the Internet of things according to claim 5, characterized in that: the expansion bags (65) are designed in a plurality of ways, and the expansion bags (65) are communicated with each other through conical pipes; the opening of one side of the conical tube close to the extrusion bag (64) is smaller than the opening of one side of the conical tube far away from the extrusion bag (64).
CN202010636758.XA 2020-07-03 2020-07-03 Low-voltage vacuum circuit breaker based on Internet of things Pending CN111952107A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112713061A (en) * 2020-12-17 2021-04-27 江苏方天电力技术有限公司 Low-voltage distribution network Internet of things breaker with self-diagnosis function and use method thereof

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CN1102502A (en) * 1993-07-14 1995-05-10 株式会社日立制作所 Vacuum circuit breaker as well as vacuum valve and electric contact used in same
CN106558447A (en) * 2015-09-30 2017-04-05 上海良信电器股份有限公司 A kind of vacuum circuit breaker contact system
CN106783366A (en) * 2017-01-13 2017-05-31 中航宝胜电气股份有限公司 126kV cylinder vacuum breakers with high current carrying capacity
WO2017144233A1 (en) * 2016-02-25 2017-08-31 Siemens Aktiengesellschaft Assembly and method for guiding a selector rod of a high-voltage circuit breaker
CN208422771U (en) * 2018-07-04 2019-01-22 江西旭光真空电器有限公司 A kind of high leakproofness vacuum circuit breaker
CN109616373A (en) * 2018-12-12 2019-04-12 西安交通大学 A kind of vacuum interrupter composite contact, vacuum interrupter and vacuum circuit breaker
CN109830401A (en) * 2019-04-04 2019-05-31 岳盛仙 A kind of vacuum switch
CN110828227A (en) * 2019-10-12 2020-02-21 保定市冀中电力设备有限责任公司 Full-working-condition intelligent solid-sealed high-voltage alternating-current vacuum circuit breaker

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1102502A (en) * 1993-07-14 1995-05-10 株式会社日立制作所 Vacuum circuit breaker as well as vacuum valve and electric contact used in same
CN106558447A (en) * 2015-09-30 2017-04-05 上海良信电器股份有限公司 A kind of vacuum circuit breaker contact system
WO2017144233A1 (en) * 2016-02-25 2017-08-31 Siemens Aktiengesellschaft Assembly and method for guiding a selector rod of a high-voltage circuit breaker
CN106783366A (en) * 2017-01-13 2017-05-31 中航宝胜电气股份有限公司 126kV cylinder vacuum breakers with high current carrying capacity
CN208422771U (en) * 2018-07-04 2019-01-22 江西旭光真空电器有限公司 A kind of high leakproofness vacuum circuit breaker
CN109616373A (en) * 2018-12-12 2019-04-12 西安交通大学 A kind of vacuum interrupter composite contact, vacuum interrupter and vacuum circuit breaker
CN109830401A (en) * 2019-04-04 2019-05-31 岳盛仙 A kind of vacuum switch
CN110828227A (en) * 2019-10-12 2020-02-21 保定市冀中电力设备有限责任公司 Full-working-condition intelligent solid-sealed high-voltage alternating-current vacuum circuit breaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112713061A (en) * 2020-12-17 2021-04-27 江苏方天电力技术有限公司 Low-voltage distribution network Internet of things breaker with self-diagnosis function and use method thereof

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