CN115910710A

CN115910710A - Primary and secondary split type magnetic control quick-acting circuit breaker

Info

Publication number: CN115910710A
Application number: CN202211488552.2A
Authority: CN
Inventors: 海涛; 尹广俊; 张维; 周斌; 魏浩铭; 钟子华; 李斐刚; 黄楷涛
Original assignee: Zhuhai XJ Electric Co Ltd
Current assignee: Zhuhai XJ Electric Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-04

Abstract

The application provides a split type magnetic control snap action type circuit breaker of a secondary, include: the primary part comprises a primary base mechanism and a magnetic control driving mechanism, the primary base mechanism is provided with a guide rod, a rotating shaft assembly device and a static contact device, the rotating shaft assembly device is provided with a movable contact knife, one end of the guide rod is connected to the rotating shaft assembly device, and the other end of the guide rod extends to the outside of the primary base mechanism; the magnetic control driving mechanism comprises a supporting plate, a static iron core, a coil and a movable iron core, wherein the static iron core is fixed on the supporting plate, the coil is arranged inside the static iron core, a pressure spring is arranged between the movable iron core and the static iron core, and a guide rod penetrates through the supporting plate, the static iron core and the movable iron core; and the secondary part comprises a secondary shell part and a control panel part, the secondary shell part is movably arranged on the primary part, the control panel part is used for providing energy required by opening and closing actions for the magnetic control driving mechanism so as to drive the guide rod to move, and the guide rod drives the movable contact knife of the rotating shaft assembly device to contact the static contact device or separate from the static contact device.

Description

Primary and secondary split type magnetic control quick-acting circuit breaker

Technical Field

The application relates to the technical field of electrical equipment, in particular to a secondary split type magnetic control quick-acting circuit breaker.

Background

At present, the molded case circuit breaker is widely applied to the fields of power distribution networks, photovoltaics and new energy. The operating mechanism of the existing molded case circuit breaker is of a spring type, a large number of parts are arranged, the structure is complex, the molded case circuit breaker is easy to wear and tear, the service life is short, the intelligent level of the traditional molded case circuit breaker is low, the opening and closing speed is low, time and labor are wasted, and the working condition requirement of the existing rapid intelligent control cannot be met. In addition, the conventional molded case circuit breaker cannot realize primary and secondary modularization and cannot realize uninterrupted maintenance. When the primary part can also work normally, the secondary control system is aged and damaged, so that the whole circuit breaker is scrapped, and the service life of the circuit breaker cannot be synchronized once and twice, thereby causing the waste of resources.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a primary-secondary split type magnetic control quick-acting circuit breaker which is convenient to assemble, can quickly complete the switching-on operation and can prolong the service life of a product.

In a first aspect, an embodiment of the present application provides a split type magnetic control snap-action circuit breaker of a secondary, including:

the primary part comprises a primary base mechanism and a magnetic control driving mechanism, the primary base mechanism is provided with a guide rod, a rotating shaft assembly device and a static contact device, the rotating shaft assembly device is provided with a movable contact knife, one end of the guide rod is connected to the rotating shaft assembly device, and the other end of the guide rod extends to the outside of the primary base mechanism; the magnetic control driving mechanism comprises a supporting plate, a static iron core, a coil and a movable iron core, the supporting plate is arranged on the primary base mechanism, the static iron core is fixed on the supporting plate, the coil is arranged inside the static iron core, a pressure spring is arranged between the movable iron core and the static iron core, and the guide rod penetrates through the supporting plate, the static iron core and the movable iron core;

and the secondary part comprises a secondary shell part and a control panel part, the secondary shell part is movably arranged on the primary part, the control panel part is arranged on the secondary shell part, the control panel part is used for providing energy required by opening and closing actions for the magnetic control driving mechanism so as to drive the guide rod to move, and the guide rod is used for driving the movable contact knife of the rotating shaft assembly device to contact with or separate from the static contact device.

According to some embodiments of the application, the primary base mechanism comprises a first base, a first middle cover and a first bottom plate, the first middle cover is installed on the first base, the first bottom plate is arranged on the bottom side of the first base, the first base is internally divided into an A-phase channel, a B-phase channel, a C-phase channel and an N-phase channel, the head end of the first base is a power supply side, and the tail end of the first base is a load side.

According to some embodiments of the application, static contact device installs first base the power side, static contact device includes stationary contact copper bar, stationary contact, first protection casing and striking copper bar, the stationary contact with the striking copper bar set up in on the stationary contact copper bar, the stationary contact be used for when divide-shut brake action with movable contact sword contact or separation, the striking copper bar is arranged in leading electric arc to the arc-extinguish chamber when separating brake operation, stationary contact copper bar shape is the bending type, first protection casing is installed on the stationary contact copper bar.

According to some embodiments of the present application, the static contact device further comprises an arc-extinguishing cover device, the arc-extinguishing cover device is installed on an upper side of the static contact device, the arc-extinguishing cover device comprises an arc-extinguishing cover, a second protective cover, a third baffle and a fourth baffle, the arc-extinguishing cover is of a grid-plate type structure, and the second protective cover shields the arc-extinguishing cover, the third baffle and the fourth baffle; and the arc generated in the switching-off operation is attracted to the grid of the arc-extinguishing shield by the arc-striking copper bar of the static contact device, reaches the third baffle through the grid of the arc-extinguishing shield, is blown out of the hole in the third baffle and is blown to the fourth baffle, and the fourth baffle responds to the bending and generates a gap so that the arc leaves the circuit breaker.

According to some embodiments of the present application, the rotating shaft assembly device is located at the rear side of the static contact device, the rotating shaft assembly device includes three movable contact knives, three first torsion springs and a rotating shaft knife pouch, the middle part and two side parts of the rotating shaft knife pouch are provided with a plurality of cylinders, the cylinders are embedded in the semi-arc groove of the first base, and the rotating shaft knife pouch can rotate relative to the first base; the rotating shaft knife rest is characterized in that three cavities are arranged in the rotating shaft knife rest and respectively comprise an A-phase cavity, a B-phase cavity and a C-phase cavity, a movable knife and a first torsion spring are installed in each cavity, the movable knife is fixed in the rotating shaft knife rest through the first torsion spring, a hole site for penetrating a first pin shaft is formed in the front end of each cavity, through holes are formed in the hole sites of the A-phase cavity and the C-phase cavity, the first pin shaft reaches the B-phase cavity through the A-phase cavity or the C-phase cavity, the hole site of the B-phase cavity is a blind hole, and the first pin shaft is fixed on the B-phase cavity.

According to some embodiments of the present application, the primary base mechanism further comprises a pressing plate fixed on the first base and used for fixing the magnetic control driving mechanism, a plurality of semi-cylindrical grooves are provided on a bottom surface of the pressing plate, and the semi-cylindrical grooves are used for limiting the cylinder; the pressure plate is provided with a through hole which is used for penetrating the guide rod and enabling the guide rod to do direct motion along the direction vertical to the pressure plate; the pressure plate is also provided with a plurality of rib structures for enhancing the structural strength.

According to some embodiments of this application, the one end of guide arm is forked arch sheet metal component, and the other end is the cylinder pole of two different diameters, the rectangle hole site has been seted up to the arch sheet metal component, the one end of first round pin axle is fixed in the B looks cavity, the other end is located the arch sheet metal component on the rectangle hole site.

According to some embodiments of this application, a base mechanism still includes magnetism reserve protection device and integral type mutual-inductor, the quantity of movable contact sword is three, the afterbody welding of movable contact sword has the annealed copper line, the afterbody welding of annealed copper line has little copper bar, little copper bar is provided with the through-hole, the third copper bar is installed to the load side department of N looks passageway, third copper bar upper portion is installed the second safety cover the third baffle with the fourth baffle, first baffle is installed to the rear side of second safety cover, first baffle screens is in on the first base, it is three little copper bar is connected with first copper bar respectively, the third copper bar links to each other with the second copper bar, A looks, B looks and C looks first copper bar passes respectively magnetism reserve protection device with mutual-inductor after-fixing on the first base, N looks the third integral type copper bar passes the integral type mutual-inductor after-fixing on the first base.

According to some embodiments of this application, magnetism reserve protection device includes third safety cover, fourth safety cover, moves iron sheet, second round pin axle, frame, quiet iron sheet, 2P terminal plug and first micro-gap switch, magnetism reserve protection device is located the rear side of little copper bar is fixed on the first base, the third safety cover with buckle connection between the fourth safety cover, the third safety cover with the bottom of fourth safety cover is provided with and is used for fixing the first draw-in groove of quiet iron sheet, quiet iron sheet is fixed in on the first base, be fixed with on the quiet iron sheet the frame, the frame passes through the second round pin axle with move the iron sheet and connect, be provided with the turning arm structure on the moving iron sheet, the epaxial second torsional spring of installing of second round pin, the second torsional spring screens respectively move the iron sheet with the frame, so that the moving iron sheet is in and does not touch first micro-gap switch's original state, be provided with the round axle that is used for installing real-time first micro-gap switch on the fourth safety cover, first terminal with 2P terminal plug is connected with the third protection cover plug and the integral type P mutual-gap switch.

According to some embodiments of this application, power side voltage is installed to one side of the bottom surface of first base and is got the electric terminal, power side voltage get the electric terminal respectively with first base opposite side A looks, B looks and C looks static copper bar and N looks the third copper bar communicates with each other, load side voltage sampling terminal and load side temperature sampling terminal are installed to the opposite side of the bottom surface of first base, load side voltage sampling terminal respectively with first base opposite side A looks, B looks and C looks first copper bar communicates with each other, load side temperature sampling terminal respectively with A looks, B looks and C looks first copper bar and N looks the second copper bar communicates with each other, power side voltage get the electric terminal load side voltage sampling terminal with load side temperature sampling terminal with the integral type mutual-inductor electricity is connected.

According to the technical scheme of the embodiment of the application, the following technical effects are included but not limited: the split type magnetic control snap-action type circuit breaker of a secondary of this application embodiment, a secondary adopts modular design, but the whole plug of secondary is changed, has improved the life of product, and a secondary module is mutually independent, has improved the reliability of product. And the design has magnetic control actuating mechanism, can drive the quick completion of circuit breaker and separate floodgate, closing operation, improves the breaking performance of product. Therefore, the split type magnetic control fast-moving type circuit breaker of primary and secondary of this application embodiment not only convenient assembling, but also can accomplish the branch switching-on operation fast to can also improve the life of product.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

Fig. 1 is a schematic diagram of a secondary split type magnetically controlled quick-acting plastic case circuit breaker;

FIG. 2 is a schematic view of the structure of the primary portion;

FIG. 3 is a schematic front view of the primary base mechanism;

FIG. 4 is a bottom side view of the primary base unit;

FIG. 5 is a first internal schematic view of the primary mount mechanism;

FIG. 6 is a second internal schematic view of the primary mount mechanism;

fig. 7 is a schematic structural diagram of a static contact device;

fig. 8 is an exploded view of a stationary contact device;

figure 9 is a schematic view of the arc chute arrangement;

figure 10 is an exploded view of the arc chute apparatus;

FIG. 11 is a schematic view of the spindle assembly;

FIG. 12 is a schematic view of the fixing of the shaft assembly;

FIG. 13 is a schematic view of a spindle case;

FIG. 14 is a schematic top view of the platen;

FIG. 15 is a schematic view of the bottom surface of the platen;

FIG. 16 is a schematic view of the connection of the guide rod, the rotary shaft assembly and the pressure plate;

FIG. 17 is a schematic view of a magnetic backup protection device;

FIG. 18 is an internal schematic view of a magnetic backup protection device;

FIG. 19 is an exploded view of a magnetic backup protection device;

fig. 20 is a first base bottom terminal routing diagram;

FIG. 21 is a schematic diagram of an integrated transformer structure;

FIG. 22 is a schematic view of the interior of the integrated instrument transformer;

FIG. 23 is an exploded view of the integrated transformer;

FIG. 24 is a schematic diagram of a circuit board assembly configuration;

FIG. 25 is a schematic view of a cage construction;

FIG. 26 is a schematic view of the top cover construction;

FIG. 27 is an integral instrument transformer and its connection assembly;

FIG. 28 is a schematic view of a first middle cover structure;

FIG. 29 is a schematic view of the installation of the magnetic control driving mechanism and the leakage of the 64-bit European-style socket;

FIG. 30 is a schematic view of a magnetically controlled drive mechanism;

FIG. 31 is a partial schematic view of a magnetically controlled drive mechanism;

FIG. 32 is an internal cross-sectional view of the magnetically controlled drive mechanism;

FIG. 33 is a handle mounting schematic;

FIG. 34 is a schematic illustration of a secondary partial explosion;

FIG. 35 is a schematic view of a secondary portion structure;

FIG. 36 is a schematic view of the internal structure of the secondary portion;

FIG. 37 is a schematic view of a secondary base structure;

FIG. 38 is a schematic view of a secondary portion control plate;

fig. 39 is a schematic view of the upper cover structure.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the positional descriptions referred to, for example, the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present number, and larger, smaller, inner, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise specifically limited, terms such as set, installed, connected and the like should be understood broadly, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific contents of the technical solutions.

In some cases, molded case circuit breakers are widely used in power distribution networks, photovoltaics, and new energy applications. The operating mechanism of the existing molded case circuit breaker is of a spring type, a large number of parts are arranged, the structure is complex, the molded case circuit breaker is easy to wear and tear, the service life is short, the intelligent level of the traditional molded case circuit breaker is low, the opening and closing speed is low, time and labor are wasted, and the working condition requirement of the existing rapid intelligent control cannot be met. In addition, the conventional molded case circuit breaker cannot realize primary and secondary modularization and cannot realize uninterrupted maintenance. When the primary part can also work normally, the secondary control system is aged and damaged, so that the whole circuit breaker is scrapped, and the service life of the circuit breaker cannot be synchronized once and twice, thereby causing the waste of resources.

Based on the situation, the embodiment of the application provides a primary-secondary split type magnetic control quick-acting circuit breaker which is convenient to assemble, can quickly complete the switching-on operation and can prolong the service life of a product.

In one embodiment, a secondary split type magnetically controlled snap action circuit breaker includes:

the primary part comprises a primary base mechanism and a magnetic control driving mechanism, the primary base mechanism is provided with a guide rod, a rotating shaft assembly device and a static contact device, the rotating shaft assembly device is provided with a movable contact knife, one end of the guide rod is connected to the rotating shaft assembly device, and the other end of the guide rod extends to the outside of the primary base mechanism; the magnetic control driving mechanism comprises a supporting plate, a static iron core, a coil and a movable iron core, the supporting plate is arranged on the primary base mechanism, the static iron core is fixed on the supporting plate, the coil is arranged inside the static iron core, a pressure spring is arranged between the movable iron core and the static iron core, and a guide rod penetrates through the supporting plate, the static iron core and the movable iron core;

In one embodiment, the primary base mechanism comprises a first base, a first middle cover and a first bottom plate, the first middle cover is installed on the first base, the first bottom plate is arranged on the bottom side of the first base, the interior of the first base is divided into an A-phase channel, a B-phase channel, a C-phase channel and an N-phase channel, the head end of the first base is a power supply side, and the tail end of the first base is a load side.

In one embodiment, the static contact device is installed on the power supply side of the first base and comprises a static contact copper bar, a static contact, a first protective cover and an arc striking copper bar, the static contact and the arc striking copper bar are arranged on the static contact copper bar, the static contact is used for being in contact with or separated from the movable contact knife during opening and closing actions, the arc striking copper bar is used for guiding an electric arc into the arc extinguishing cover during opening and closing operations, the static contact copper bar is bent, and the first protective cover is installed on the static contact copper bar.

In an embodiment, the static contact device further comprises an arc-extinguishing cover device, the arc-extinguishing cover device is installed on the upper side of the static contact device and comprises an arc-extinguishing cover, a second protective cover, a third baffle and a fourth baffle, the arc-extinguishing cover is of a grid-plate type structure, and the second protective cover shields the arc-extinguishing cover, the third baffle and the fourth baffle; and the arc generated during the switching-off operation is absorbed into the grid of the arc-extinguishing shield by the arc-striking copper bar of the static contact device, reaches the third baffle plate through the grid of the arc-extinguishing shield, is blown out of the hole in the third baffle plate and blows towards the fourth baffle plate, and the fourth baffle plate responds to the bending and generates a gap so that the arc leaves the circuit breaker.

In one embodiment, the rotating shaft assembly device is positioned at the rear side of the static contact device and comprises three movable contact knives, three first torsion springs and a rotating shaft knife sleeve, a plurality of cylinders are arranged in the middle part and two side parts of the rotating shaft knife sleeve, the cylinders are embedded with the semi-circular arc groove of the first base in a clamping manner, and the rotating shaft knife sleeve can rotate relative to the first base; the rotating shaft knife sleeve is internally provided with three cavities, the three cavities are an A-phase cavity, a B-phase cavity and a C-phase cavity respectively, each cavity is provided with a movable knife and a first torsion spring, the movable knife is fixed in the rotating shaft knife sleeve through the first torsion spring, the front end of each cavity is provided with a hole site for penetrating through a first pin shaft, the hole sites of the A-phase cavity and the C-phase cavity are through holes, the first pin shaft reaches the B-phase cavity through the A-phase cavity or the C-phase cavity, the hole site of the B-phase cavity is a blind hole, and the first pin shaft is fixed on the B-phase cavity.

In one embodiment, the primary base mechanism further comprises a pressing plate, the pressing plate is fixed on the first base and used for fixing the magnetic control driving mechanism, and a plurality of semi-cylindrical grooves are formed in the bottom surface of the pressing plate and used for limiting the cylinder; the pressure plate is provided with a through hole which is used for penetrating the guide rod and enabling the guide rod to do direct-acting motion along the direction vertical to the pressure plate; the pressure plate is also provided with a plurality of rib structures for reinforcing the structural strength.

In an embodiment, one end of the guide rod is a bifurcated arched sheet metal part, the other end of the guide rod is two cylindrical rods with different diameters, the arched sheet metal part is provided with a rectangular hole site, one end of the first pin shaft is fixed in the B-phase cavity, and the other end of the first pin shaft is located on the rectangular hole site of the arched sheet metal part.

In an embodiment, the primary base mechanism further comprises a magnetic backup protection device and an integrated mutual inductor, the number of the movable contact knives is three, annealed copper wires are welded at the tail portions of the movable contact knives, small copper bars are welded at the tail portions of the annealed copper wires and provided with through holes, third copper bars are installed at the load sides of the N-phase channels, a second protection cover is installed on the upper portion of the third copper bars, a third baffle plate and a fourth baffle plate, a first baffle plate is installed at the rear side of the second protection cover, the first baffle plate is clamped on a first base, the three small copper bars are respectively connected with first copper bars, the third copper bars are connected with the second copper bars, the A-phase copper bars, the B-phase copper bars and the C-phase copper bars respectively penetrate through the magnetic backup protection device and the integrated mutual inductor to be fixed on the first base, and the N-phase third copper bars penetrate through the integrated mutual inductor to be fixed on the first base.

In an embodiment, the magnetic backup protection device comprises a third protection cover, a fourth protection cover, a movable iron sheet, a second pin shaft, a rack, a static iron sheet, a 2P terminal plug and a first micro switch, the magnetic backup protection device is located at the rear side of the small copper bar and fixed on a first base, the third protection cover and the fourth protection cover are connected in a buckling mode, a first clamping groove used for fixing the static iron sheet is formed in the bottom of the third protection cover and the bottom of the fourth protection cover, the static iron sheet is fixed on the first base, the rack is fixed on the static iron sheet and connected with the movable iron sheet through a second pin shaft, a crank arm structure is arranged on the movable iron sheet, a second torsion spring is installed on the second pin shaft, the movable iron sheet and the rack are respectively clamped by the second torsion spring, so that the movable iron sheet is in an original state that the movable iron sheet cannot touch the first micro switch, a round shaft used for installing the real-time first micro switch is arranged on the fourth protection cover, the first micro switch is electrically connected with the 2P terminal plug, a second clamping groove corresponding to the 2P terminal plug is arranged on the third protection cover, and the integral mutual inductor are plugged in a mutual inductor.

In one embodiment, a power supply side voltage taking terminal is installed on one side of the bottom surface of the first base, the power supply side voltage taking terminal is respectively communicated with the static contact copper bars of the A phase, the B phase and the C phase and the third copper bars of the N phase on the other side of the first base, a load side voltage sampling terminal and a load side temperature sampling terminal are installed on the other side of the bottom surface of the first base, the load side voltage sampling terminal is respectively communicated with the first copper bars of the A phase, the B phase and the C phase on the other side of the first base, the load side temperature sampling terminal is respectively communicated with the first copper bars of the A phase, the B phase and the C phase and the second copper bars of the N phase, and the power supply side voltage taking terminal, the load side voltage sampling terminal and the load side temperature sampling terminal are electrically connected with the integrated mutual inductor.

The embodiments of the present application will be further explained with reference to the drawings.

As shown in fig. 1, fig. 1 is a schematic view of a primary and secondary split type magnetically controlled fast-moving molded case circuit breaker, in which a part 1 is a primary part and a part 2 is a secondary part. As can be seen from fig. 1, the magnetically controlled quick acting type plastic case circuit breaker is divided into a primary part and a secondary part. The primary part is a main loop body part of the circuit breaker, and the secondary part is a control part of the circuit breaker.

In addition, as shown in fig. 2, fig. 2 is a structural schematic diagram of a primary part, wherein a reference numeral 11 is a primary base mechanism, a reference numeral 12 is a magnetron driving mechanism, and a reference numeral 13 is a cap. As can be seen from FIG. 2, the primary part is divided into a primary base mechanism, a magnetic control driving mechanism and a cap.

As shown in fig. 3 and 4, fig. 3 is a front external view of the primary base mechanism, and fig. 4 is a bottom external view of the primary base mechanism, where reference numeral 100 is a first base, reference numeral 101 is a first middle cover, and reference numeral 103 is a first bottom plate.

In one embodiment, the primary base mechanism housing portion comprises a first base, a first middle cover and a first bottom plate, the first middle cover is mounted on the first base through 10 screws, the first base and the first middle cover are made of DMC materials, and the flame retardant performance of the DMC material is V0 level. The first bottom plate is adhered to the bottom side of the first base and is made of epoxy resin. The first base is internally divided into four channels which are respectively A/B/C/N phase channels. The head end of the first base is a power supply side, and the tail end of the first base is a load side.

In addition, as shown in fig. 5, fig. 5 is a first internal schematic view of the primary base mechanism, wherein a reference numeral 104 is an arc extinguishing chamber device, a reference numeral 105 is a pressing plate, a reference numeral 106 is a first baffle, a reference numeral 107 is a guide rod, a reference numeral 108 is a magnetic backup protection device, a reference numeral 109 is an integrated transformer, and a reference numeral 110 is a second baffle.

In addition, as shown in fig. 6, fig. 6 is a second internal schematic view of the primary base mechanism, in which a part 111 is a static contact device, a part 112 is a rotating shaft assembly device, a part 113 is a small copper bar, a part 114 is a first copper bar, a part 115 is a second copper bar, a part 116 is a third copper bar, and a part 117 is an inner hexagon bolt.

In one embodiment, the primary base mechanism comprises an arc extinguishing chamber device, a pressing plate, a first baffle, a guide rod, a magnetic backup protection device, an integrated mutual inductor, a second baffle, a static contact device, a rotating shaft assembly device, a small copper bar, a first copper bar, a second copper bar, a third copper bar and an inner hexagon bolt.

In addition, as shown in fig. 7 and 8, fig. 7 is a schematic structural diagram of a static contact device, fig. 8 is an exploded view of the static contact device, where a part 118 is a static contact copper bar, a part 119 is a static contact, a part 120 is a first protection cover, and a part 121 is an arc striking copper bar.

In an embodiment, the static contact device is installed on the power supply side of the first base through a screw, and includes a static contact copper bar, a static contact, a first protective cover, and an arc striking copper bar. The static contact copper bar is welded with a static contact and an arc striking copper bar, the static contact is made of silver-carbon-tungsten alloy, the static contact is a part which is mainly contacted with the moving contact during opening and closing operations, and the arc striking copper bar is used for guiding electric arcs generated by opening into the arc extinguishing cover when the breaker is opened. The shape of the stationary contact copper bar is bent, so that the current flowing to the load side from the power supply side in the circuit breaker is opposite to the current flowing to the load side in the stationary contact, and the arc extinguishing capability of the product is improved. First protective cover is installed on the stationary contact copper bar, and the electric current that produces when preventing the circuit breaker separating brake is attracted by the stationary contact copper bar, leads to the electric arc of production to scurry indiscriminately, improves the arc extinguishing ability of product. The circuit breaker has three static contact devices which are respectively positioned on the ABC three phases. The static contact copper bar can be provided with an inner hexagon bolt for connecting an external cable.

As shown in fig. 9 and 10, fig. 9 is a schematic structural view of the arc-extinguishing chamber device, and fig. 10 is an exploded view of the arc-extinguishing chamber device, in which a member 122 is a second protective cover, a member 123 is an arc-extinguishing chamber, a member 124 is a third baffle, and a member 125 is a fourth baffle.

In one embodiment, the arc-extinguishing cover device is installed on the upper side of the static contact device and comprises an arc-extinguishing cover, a second protective cover, a third baffle and a fourth baffle. The arc extinguishing cover is of a grid sheet type structure, the two sides of the arc extinguishing cover are provided with epoxy resin plates, the middle of the arc extinguishing cover is provided with an electrician pure iron grid sheet, and the arc extinguishing cover is welded on the epoxy resin plates at the two sides. The second baffle material is epoxy, is provided with the multirow aperture on the board, and the third baffle is the glass cardboard, has stronger elasticity and bending property. When the circuit breaker is opened, the generated electric arc is attracted to the grid pieces in the arc-extinguishing cover by the arc striking copper bar of the static contact device, the arc is extinguished in the arc-extinguishing cover, if the generated electric arc is too large, the current reaches the third baffle plate through the grid pieces of the arc-extinguishing cover and is blown out from the small hole in the third baffle plate, when the current is blown to the fourth baffle plate, the fourth baffle plate is soft and is bent, and the generated gap enables the electric arc to leave the circuit breaker. The circuit breaker has three complete arc-extinguishing cover devices respectively positioned on ABC three phases, and N phases do not participate in arc extinguishing. Only the second protective cover, the third baffle and the fourth baffle are arranged on the N phase.

In addition, as shown in fig. 11 and 12, fig. 11 is a schematic view of a rotating shaft assembly, fig. 12 is a schematic view of fixing the rotating shaft assembly, in which a reference numeral 126 is a movable knife, a reference numeral 127 is a first torsion spring, a reference numeral 128 is a rotating shaft knife sleeve, and a reference numeral 129 is a first pin.

In an embodiment, the rotating shaft assembly device is located at the rear side of the static contact device and comprises three movable contact knives, three first torsion springs and a rotating shaft knife sleeve, four cylinders are arranged at the middle part and two side parts of the rotating shaft knife sleeve, the rotating shaft knife sleeve is clamped by the semi-circular groove of the first base and the semi-circular groove of the pressing plate at the same time, and the rotating shaft knife sleeve can rotate relative to the first base. The movable contact knife is fixed in the rotating shaft knife sleeve through the first torsion spring, and the A/B/C three-phase movable contact knife is arranged in the three chambers from left to right.

In addition, as shown in fig. 13, fig. 13 is a schematic view of the rotary shaft cutter case. In one embodiment, hole sites capable of penetrating through the first pin shaft are arranged at the front ends of the three cavities of the rotating shaft cutter sleeve, the hole sites of the cavity of the phase A and the cavity of the phase C are through holes, the first pin shaft can penetrate through the cavity of the rightmost side or the cavity of the leftmost side and reach the cavity of the phase B, the cavity of the phase B is a blind hole, and the first pin shaft can be fixed on the cavity of the phase B.

In addition, as shown in fig. 14 and 15, fig. 14 is a schematic top view of the platen, and fig. 15 is a schematic bottom view of the platen.

In an embodiment, the material of clamp plate has higher wearability and self-lubricating property, and the top surface design of clamp plate has 4 through-holes, can fix the clamp plate on first base through four screws, and the design has four blind holes respectively at the outside position of four through-holes, inlays in every blind hole and has cylindrical inserts nut, can be used for fixed magnetic control actuating mechanism. The bottom surface of the pressing plate is provided with four extending semicylinder grooves for limiting and fixing the rotating shaft assembly. The central position of the pressure plate is provided with a through hole which can lead the guide rod to pass through and limit the guide rod, so that the guide rod can only carry out the linear motion vertical to the direction of the pressure plate. The design has many muscle structures on the clamp plate, can effectively improve structural strength when reducing part weight, prevents the clamp plate bending, guarantees that the clamp plate can bear the dual pressure under pivot assembly and the magnetic control actuating mechanism combined action.

One end of the guide rod is a forked arch-shaped sheet metal part, one end of the guide rod is two cylindrical rods with different diameters, and the arch-shaped sheet metal part and the cylindrical rods are fixed together through welding. The rectangular hole site is opened on the arch sheet metal component, and first round pin axle leads to B looks cavity department from the rightmost side of pivot tool sleeve or leftmost cavity toward the centre, and the one end of first round pin axle is fixed in B looks cavity, and the other end is located the rectangular hole site on the arch sheet metal, because the guide arm is spacing by the B looks cavity of pivot tool sleeve, therefore the guide arm can't remove about and rotate. The cylindrical rod of the guide rod penetrates through the central through hole of the pressing plate, is limited by the pressing plate at the large-diameter part, and can only move in the vertical direction through the double limitation of the pressing plate and the rotating shaft assembly.

Traditional moulded case circuit breaker's pivot assembly's fixed needs are fixed with two vertically sheet metal components to the sheet metal component can only be followed the bottom surface of first base and beaten the screw fixation, and the installation is very inconvenient, and the atress area is few, after the deciliter action of passing through thousands of circuit breakers, the pivot sword cover is cut apart by the recess of sheet metal component, and the life-span is lower. This application embodiment adopts the clamp plate fixed, beats the screw from the top, and is easy to assemble to it is spacing to adopt four recesses, and the atress action point of pivot assembly becomes four point atress by original two point atress, and the atress region is more even, and mechanics operating mode is more scientific, and the lifting surface area is 5 times of traditional circuit breaker, effectively improves moulded case circuit breaker's life.

Further, as shown in fig. 16, fig. 16 is a schematic view showing the connection between the guide rod, the rotary shaft assembly and the platen. In one embodiment, copper flexible wires are welded at the tails of the three movable contact knives, small copper bars are welded at the tails of the soft copper wires, and through holes are formed in the small copper bars.

And a third copper bar is arranged at the N-phase load side through a bolt, and a second protective cover, a third baffle and a fourth baffle are arranged on the upper part of the third copper bar. A first baffle is arranged at the rear side part of the second protective cover and is clamped on the first base.

The three small copper bars are respectively connected with a first copper bar through screws, and the third copper bar is connected with a second copper bar through screws. A first copper bar of ABC three-phase passes magnetic backup protection device, integral type mutual inductor respectively, fixes on first base through the screw. And the third copper bar of the N phase penetrates through the integrated transformer and is fixed on the first base through a screw. And the tail ends of the first copper bar and the third copper bar can be provided with hexagon socket head cap screws for connecting an external cable.

As shown in fig. 17 to 19, fig. 17 is a schematic view of the structure of the magnetic backup protection device, fig. 18 is a schematic view of the inside of the magnetic backup protection device, and fig. 19 is an exploded view of the magnetic backup protection device. The reference numeral 133 is a third protection cover, the reference numeral 134 is a fourth protection cover, the reference numeral 135 is a movable iron sheet, the reference numeral 136 is a second pin, the reference numeral 137 is a frame, the reference numeral 138 is a static iron sheet, the reference numeral 139 is a 2P terminal plug, the reference numeral 140 is a first microswitch, and the reference numeral 141 is a second torsion spring.

In one embodiment, the magnetic backup protection device comprises a third protection cover, a fourth protection cover, a moving iron sheet, a second pin shaft, a frame, a static iron sheet, a 2P terminal plug and a first microswitch. The circuit breaker has three magnetism reserve protection device altogether to design, is located the rear side of little copper bar, through the fix with screw on first base, and the upper and lower both sides of third safety cover have two buckles that stretch out respectively, and the upper and lower both sides of fourth safety cover have two recesses to design respectively, and the third safety cover can be with the mutual chucking of fourth safety cover. The bottom design of third safety cover and fourth safety cover has the draw-in groove to quiet iron sheet, can be fixed quiet iron sheet card position. There is threaded through-hole quiet iron sheet bottom, and the third safety cover respectively has two semicircle through-holes with the fourth safety cover, can be fixed first base and quiet iron sheet through the screw. The fixed iron sheet is fixedly riveted with a rack, the rack is connected with the moving iron sheet through a second pin shaft, the moving iron sheet can freely swing, and the moving iron sheet is provided with a protruding crank arm structure. And a second torsion spring is arranged on the second pin shaft and is used for clamping the movable iron sheet and the rack respectively, so that the movable iron sheet is in an original state that the movable iron sheet cannot touch the first microswitch. The design has two circular axles that stretch out on the fourth protection cover, can install first micro-gap switch, and first micro-gap switch passes through the electric wire and links to each other with 2P terminal plug, and the design has the draw-in groove to 2P terminal plug on the third protection cover, can fix 2P terminal plug. The 2P terminal plug can be plugged with the integrated mutual inductor to realize data transmission. The third safety cover all designs with the fourth safety cover and has the rectangle hole groove that can wear the copper bar. Firstly, let first copper bar pass from magnetism reserve protection device's frame position, secondly play the guide effect for the installation of first copper bar, make things convenient for the copper bar to pass magnetism reserve protection device fast

When the inside heavy current that is 15 times through being higher than the rated current of circuit breaker, near frame produces great magnetic field, make moving iron sheet and quiet iron sheet have had magnetism, because quiet iron sheet is fixed, moving iron sheet attracts towards quiet iron sheet direction, draw the swing of starting the iron sheet, make the connecting lever structure of moving iron sheet touch and compress first micro-gap switch's shell fragment then, trigger first micro-gap switch, data transmit for the integral type mutual-inductor through the 2P terminal, and then transmit to the secondary part, the secondary part sends relevant separating brake instruction, make circuit breaker separating brake. When the large current disappears, the moving iron sheet and the static iron sheet lose magnetism, and the moving iron sheet returns to the original state that the moving iron sheet cannot touch the first microswitch under the action of the second torsion spring.

As shown in fig. 20, fig. 20 is a first chassis bottom surface terminal wiring diagram. The reference numeral 130 is a power supply side voltage taking terminal, the reference numeral 131 is a load side voltage sampling terminal, and the reference numeral 132 is a load side temperature sampling terminal.

In one embodiment, a power supply side voltage electricity taking terminal is mounted on one side of the bottom surface of the first base through screws and is respectively communicated with the ABC three-phase static contact copper bar and the N-phase third copper bar on the other side of the first base, a load side voltage sampling terminal and a load side temperature sampling terminal are mounted on the other side of the bottom surface of the first base through screws, the load side voltage sampling terminal is respectively communicated with the ABC three-phase first copper bar on the other side of the first base, and the load side temperature sampling terminal is respectively communicated with the ABC three-phase first copper bar and the N-phase second copper bar. The three power taking and sampling terminals are finally inserted into the integrated mutual inductor through terminal plugs through flexible wire wiring and transmitted to the secondary part through the mutual inductor, so that the voltage and the temperature of the circuit breaker are monitored in real time.

In addition, for the integrated transformer of the embodiment of the application, the specific scheme is as follows:

the current transformer of the traditional molded case circuit breaker is of a plurality of circular ring-shaped structures, the transformer is very inconvenient to install, the first method is to bend a copper bar to penetrate through the transformer, a large amount of space is wasted, and the installation is unchanged. The second method is to cut the copper bar into several pieces, after the copper bar passes the mutual-inductor, the copper bar is spliced together through the screw again, although simple to operate, the space is still extravagant a lot, and the cost is increased, the screw connection department also can cause the temperature rise too high, influence the mutual-inductor performance, the third needle method is to wear the position of mutual-inductor to adopt the annealed copper line, after emboliaing the coil of mutual-inductor on the annealed copper line, again with the patchcord with the copper bar welding of other positions together, although the space has been practiced thrift, it is also comparatively convenient to install, but when the mutual-inductor breaks down, can't take out the mutual-inductor from the annealed copper line, the flexibility is very low. And the traditional mutual inductor can only realize current sampling and has single function. Based on this, the embodiment of the application designs an integrated transformer integrating multiple sensing functions.

The integral transformer is installed on the rear side of the magnetic backup protection device and fixed on the first base through screws. The method comprises the following steps: top cap, shell frame, circuit board subassembly and mutual-inductor subassembly. The transformer assembly comprises a measuring current transformer, a protection current transformer and a leakage protection transformer. The circuit board assembly comprises a first circuit board, a 64-bit European-style socket, a row seat, a row pin, a voltage sampling terminal seat, a temperature sampling terminal seat, a second circuit board, a voltage electricity-taking terminal seat and a magnetic backup sampling terminal seat.

The shell frame is of a main structure of the integrated mutual inductor and integrally of a thin shell structure, the shell frame is used for mounting other parts, three through holes are designed at the tail end of the top surface of the shell frame, and the integrated mutual inductor can be fixed on the first base through screw connection. Four annular channels are designed in the cavity inside the shell frame, and the inner sides of the annular channels penetrate through the first copper bars of the ABC three phases and the second copper bars of the N phases. The outer side is sequentially sleeved with four measuring current transformers, three protection current transformers and a leakage protection transformer. The measuring current transformer is arranged on four phases of the ABCN and used for accurately measuring the current of each phase and monitoring the operation condition of the breaker in real time. The protection current transformer is arranged on the ABC three phases and used for monitoring the condition of high current passing through the three phases, when the passing current exceeds a calibrated threshold value, such as 5-15 times rated current, data are transmitted to the secondary part through the circuit board assembly, and the secondary part sends out related opening instructions to open the circuit breaker. The leakage protection mutual inductor is of a runway type annular structure, the inner ring can penetrate through the ABCN four-phase copper bar, the copper bar does not need to be bent, and the leakage protection mutual inductor can be directly inserted into the copper bar to penetrate through the mutual inductor. Real-time data for monitoring leakage current generated in a circuit breaker. When the generated leakage current exceeds a predetermined threshold, the breaker is triggered to open.

In addition, as shown in fig. 21 to 27, fig. 21 is a schematic structural view of the integrated instrument transformer, fig. 22 is a schematic internal view of the integrated instrument transformer, fig. 23 is an exploded view of the integrated instrument transformer, fig. 24 is a schematic structural view of a circuit board assembly, fig. 25 is a schematic structural view of a housing, fig. 26 is a schematic structural view of a top cover, and fig. 27 is a schematic structural view of the integrated instrument transformer and a connecting assembly thereof. The reference numeral 142 is a top cover, the reference numeral 143 is a shell frame, the reference numeral 144 is a circuit board assembly, the reference numeral 145 is a transformer assembly, the reference numeral 146 is a measuring current transformer, the reference numeral 147 is a protective current transformer, the reference numeral 148 is a leakage protection transformer, the reference numeral 149 is a first circuit board, the reference numeral 150 is a 64-bit european socket, the reference numeral 151 is a socket, the reference numeral 152 is a pin, the reference numeral 153 is a voltage sampling terminal block, the reference numeral 154 is a temperature sampling terminal block, the reference numeral 155 is a second circuit board, the reference numeral 156 is a voltage power-taking terminal block, and the reference numeral 157 is a magnetic backup sampling terminal block.

In one embodiment, the circuit board assembly is located above the shell frame and is responsible for transmission work of the transformer data. The top cap is located the top of circuit board subassembly, and the bottom surface design of top cap has a plurality of square bulges, can realize fixed to the screens of circuit board, adopts countersunk screw to fix the top cap on the shell frame, and saving space that can furthest for expand the inner chamber volume of shell frame, improve the detection precision of mutual-inductor.

The top of the shell frame is provided with a larger empty slot, and data wires of the three transformers penetrate through the empty slot to be welded on the first circuit board and are welded by adopting a patch. The shell frame is provided with a long rectangular block extending out at the bottom side of the N-phase part and used for bearing a second circuit board. The bottom side of the second circuit board is welded with a voltage electricity-taking terminal seat, a voltage sampling terminal seat and a temperature sampling terminal seat which are respectively and mutually spliced with a power supply side voltage electricity-taking terminal, a load side voltage sampling terminal and a load side temperature sampling terminal. The upside welding has three row's seat, installs row's needle on arranging the seat, arranges the other end of needle and is connected with the row seat of welding on first circuit board. And the 64-bit European-style socket is welded on the upper side of the first circuit board and is used as a data transmission interface with the secondary part, and all current, voltage, temperature and magnetic backup sampling information are gathered. Three magnetic backup sampling terminal seats are welded in front of the first circuit board and are mutually spliced with the three magnetic backup protection devices.

The integrated transformer comprises a shell frame, a current transformer, a shell frame, a shell and a shell, wherein the shell frame is internally provided with a cavity for installing the current transformer, and epoxy resin is filled and sealed in the cavity.

Sampling integral type mutual-inductor only needs during the installation to put into a base with the mutual-inductor, then from the mutual-inductor tail end cut straightly pass the copper bar can, both practiced thrift the space, improved assembly efficiency again. And the encapsulation of the current transformers is realized, the current transformers are effectively protected, the false operation caused by disturbance of external factors is prevented, and the reliability of the transformers is effectively improved.

The integrated mutual inductor can acquire voltage, current and temperature information of the circuit breaker in real time, so that comprehensive dynamic monitoring of the circuit breaker is realized, and the product intelligence is improved. Magnetic backup protection information is integrated, and when the current transformer is saturated and fails due to overlarge current, the opening signal can still be transmitted, so that the reliability of the product is improved.

In addition, the second baffle is installed on the upper portion of first copper bar and second copper bar end, through the draw-in groove screens of first base for prevent that external foreign matter from getting into inside the circuit breaker body.

In addition, as shown in fig. 28, fig. 28 is a schematic view of the first middle cover structure. In one embodiment, the first middle cap has ten through holes at both ends thereof, and is mounted on the first base by means of screws. The front end of the first middle cover is provided with a downward concave rectangular structure with two layers of steps, six through holes are formed in the first step, four corners are used for fixing the magnetic control driving mechanism on the pressing plate through screws, and the other two corners are used for fixing the magnetic control driving mechanism on the first base through screws, so that the magnetic control driving mechanism is dually fixed, and the installation reliability of the magnetic control driving mechanism is improved. Four small through holes and a large circular through hole are formed in the second step, the four small through holes avoid the interference of the magnetic control driving mechanism and the first middle cover, the large circular through hole is used for passing through the guide rod, and a raised rib structure is designed around the large circular through hole to improve the structural strength of the position. A long rectangular through hole is designed at the rear end of the first middle cover, and a 64-bit European-style socket in the integrated transformer is exposed out of the through hole and connected with the secondary part.

As shown in fig. 29 and 30, fig. 29 is a schematic view of the installation of the magnetic control drive mechanism and the leakage of the 64-bit european style socket, and fig. 30 is a schematic view of the magnetic control drive mechanism. Wherein, reference numeral 158 is a supporting plate, reference numeral 159 is a fifth protective cover, reference numeral 160 is a top plate, reference numeral 161 is a third circuit board, reference numeral 162 is a 12P euro-type socket, reference numeral 163 is a crank arm, reference numeral 164 is a third pin, reference numeral 165 is a small bracket, reference numeral 166 is a second microswitch, and reference numeral 167 is a guide seat.

The structure of the magnetic control driving mechanism is as follows:

the magnetic control driving mechanism is positioned on the upper part of the primary base mechanism and is a driving mechanism for the circuit breaker to perform opening and closing movements.

The supporting plate is positioned at the lowest part of the magnetic control driving mechanism, six circular through holes are designed on the periphery of the supporting plate, and the magnetic control driving mechanism can be fixed on the primary base mechanism through screws. One side of the supporting plate is designed into a turned-up flanging sheet metal structure, and a third circuit board can be fixed through screws and is used for transmitting data of the magnetic control driving mechanism to the secondary part. The third circuit board is welded with a 12P European-style socket, and the plug-in connection with the secondary part can be realized.

Four guide posts are riveted on the supporting plate and the top plate. The four guide posts are wrapped by a fifth protective cover.

The fifth protective cover is arranged between the bottom plate and the top plate and limited by the four guide posts and used for protecting internal parts of the magnetic control driving mechanism, a wiring channel capable of guiding the data line of the second microswitch is designed inside the protective cover, and the data line of the second microswitch can be transmitted to the third circuit board from the internal wiring of the magnetic control driving mechanism.

The lower side of the central part of the supporting plate is welded with a guide ring, and the guide ring can be clamped on the large circular hole of the first middle cover to achieve limiting left and right when the magnetic control driving mechanism is installed.

The fixed iron core is fixed at the central part of the supporting plate through a screw at the last time. The coil is installed inside quiet iron core, passes quiet iron core through the screw connection and fixes in the backup pad.

The movable iron core is positioned above the static iron core and is riveted and fixed on the transition plate. And a pressure spring is arranged inside the movable iron core and the static iron core, and the passive iron core and the static iron core are limited. The upper part of the transition plate is limited by the top plate, and the periphery of the transition plate is limited by the fifth protective cover.

The transition plate is fixed with a guide seat through a screw. A guide rod arranged on the primary base mechanism extends out to sequentially penetrate through the supporting plate, the static iron core, the movable iron core, the transition plate and the guide seat. The alternate positions of the big and small diameters on the guide rod are clamped on the movable iron core, and the small diameter of the guide rod is sleeved with a nut to tightly fix the guide rod, the guide seat, the transition plate and the movable iron core.

Two sides of the guide seat are provided with two sliding grooves for limiting the crank arms, and the top of the guide seat is provided with a circular groove for placing nuts.

The transition plate is fixedly provided with a first guide rod and a second guide rod through threaded connection. The top plate is provided with corresponding guide holes, so that the first guide rod and the second guide rod can only move vertically. And then the magnetic control driving mechanism can not rotate and only vertically move when the brake is switched on and switched off.

The front end on the roof is fixed with two little supports through the screw, has two second micro-gap switches through the screw mounting on the little support, separates through hollow cylinder in the middle of two second micro-gap switches to prevent that second micro-gap switch from taking place horizontal displacement, prevent that micro-gap switch from becoming invalid. And when the switch is in an opening state, the elastic sheet of the second microswitch is pressed down by the guide seat, and when the switch is in a closing state, the elastic sheet of the second microswitch is in a releasing state. The data lines of the two micro switches sequentially penetrate through the top plate, the fifth protective cover and the supporting plate to reach the lower left side of the magnetic control driving mechanism, then penetrate through the supporting plate to be welded on the third circuit board, and related parts are all provided with through holes for penetrating through the wires.

The rear end welding of roof has first support, and the turning arm passes through third round pin hub connection with first support. The front end of the crank arm is riveted with two extending pins which can be clamped in the sliding groove of the guide seat. The top design has the cylinder of taking the screw hole, can install the block to the top still designs there are two through-holes, and the position that the block corresponds also designs there are two through-holes. The handle injects the block back, can further insert to the turning arm on to for the block shares the effort, prevent when using the handle to carry out manual divide-shut brake, the block takes place to warp and destroys.

The whole primary part is used as a body structure of the circuit breaker to form an independent module, and the internal parts of the circuit breaker are also designed into small independent modules, wherein the small independent modules comprise an arc extinguishing chamber device, a static contact device, a magnetic backup protection device, a rotating shaft assembly device, an integrated mutual inductor, a magnetic control driving mechanism and the like which are all in modular design. Each module is relatively independent, is slightly influenced by interference of other parts, improves the reliability of a product, can be assembled in a modularization mode, is not influenced by other parts when each module is assembled, improves the flexibility of the product, can be assembled in an automation mode, improves the assembling efficiency and reduces the production cost.

As shown in fig. 31 to 33, fig. 31 is a partial schematic view of the magnetron drive mechanism, fig. 32 is a sectional view of the inside of the magnetron drive mechanism, and fig. 33 is a schematic view of the handle attachment. The reference numeral 168 is a first guide rod, the reference numeral 169 is a first support, the reference numeral 170 is a hollow cylinder, the reference numeral 171 is a second guide rod, the reference numeral 172 is a guide ring, the reference numeral 173 is a stationary iron core, the reference numeral 174 is a coil, the reference numeral 175 is a movable iron core, the reference numeral 176 is a compression spring, the reference numeral 177 is a guide post, the reference numeral 178 is a transition plate, and the reference numeral 179 is a handle.

In addition, for the secondary part of the embodiment of the application, the specific scheme is as follows:

the secondary part is a secondary control module of the magnetic control quick-acting type plastic shell circuit breaker. The magnetic control molded case circuit breaker mainly comprises an external secondary case part and an internal control panel part, is a brain part of the whole magnetic control molded case circuit breaker, and controls the operation of the circuit breaker in real time.

In addition, as shown in fig. 34 to 35, fig. 34 is a secondary part explosion schematic diagram, and fig. 35 is a secondary part structural schematic diagram. Wherein, the part number 21 is the secondary shell part, the part number 22 is the control panel part, the part number 201 is the second base, the part number 202 is the upper cover, the part number 203 is the flip, and the part number 204 is the plug.

In one embodiment, the secondary housing portion includes a second base, a top cover, a flip, a rubber plug, and a light guide.

The second base is positioned at the lower left side of the secondary part and can be tightly fixed with the upper cover through screws. The second base can be locked into the first middle cover. The design all around of second base has long groove structure, can place the sealing washer, improves the inside leakproofness of secondary part when the upper cover is installed on the second base.

The upper cover is a man-machine interaction part of the circuit breaker and is of a thin shell structure, and a large rectangular hole groove is designed at the front end of the upper cover and can enable a cover cap arranged on the magnetic control driving mechanism to extend out. Thereby convenient use handle inserts the block from the outside thereby control the manual divide-shut brake of circuit breaker.

The right side of the rectangular hole groove of the upper cover is provided with a plurality of arc-shaped reinforcing ribs, so that the strength of the part can be improved. The cap is prevented from touching the upper cover due to inertia force in the process of opening and closing to cause the upper cover to be broken. The design of the left lower side of upper cover has the hole site that can spill a plurality of buttons, the hole site of toggle switch, the hole site and the pilot lamp hole site of the external plug of 2P, can make the staff realize the operation control to the circuit breaker.

The light guide column is installed at the position of the hole of the indicator light of the upper cover, and the light beam of the indicator light on the control panel is transmitted to the position of the upper cover while electromagnetic compatibility is guaranteed. The design of upper cover right side downside has the rectangle recess for place carrier module. The carrier module is deposited to the upper cover and is installed flip, can be used for protecting the carrier module.

A plurality of hollow cylinders are designed on the second base, and a control plate part can be installed on the second base. All control panels of the control panel part work cooperatively to jointly complete the operation control of the circuit breaker.

The lower extreme at the second base passes through the screw connection and installs first control panel, and the welding has 64 position european style plugs on the first control panel, can with the 64 position european style socket of integral type mutual-inductor in the primary portion to inserting, data transmission to the control panel that the mutual-inductor monitored in the primary portion.

The second control panel is located the upside of first control panel, through the fix with screw on the second base, and the welding has 10P external plug, can realize the hardware interaction with external data.

The carrier module can also be inserted on the second control panel to realize the software communication function of the circuit breaker.

The third control plate is located the second control panel upside, installs on the second control panel through the screw connection, has a plurality of hollow cylinder between second control panel and the third control plate for support third control plate. And the third control plate is welded with man-machine interaction parts such as a toggle switch, a 2P external plug, a key, a liquid crystal plate, an indicator light and the like. The surge switch can adjust the circuit breaker to both "remote" and "in situ" modes of operation. The liquid crystal panel can display the running state of the circuit breaker and the time record in real time. Can realize the operation on the spot to the circuit breaker through the button, the emergent energy transmission of circuit breaker and external world can be realized to the external plug of 2P, can realize the emergent power supply to the circuit breaker. The indicator light can provide the operating state of the circuit breaker in real time. The man-machine interaction parts of the third control plate can penetrate through the upper cover, so that the operation of workers is facilitated.

The fourth control panel is located the upper left side of second base, through the fix with screw on the second base, and the welding has 12P european style plug above, can realize with the 12P european style socket in the magnetic control drive module to inserting, with magnetic control actuating mechanism's data transmission to control panel.

The fifth control board is positioned at the upper right side of the second base, is fixed on the second base through screws, and is welded with a plurality of capacitors for providing energy required by the opening and closing actions of the magnetic control driving module.

And the control panels realize data intercommunication through data lines, power strips and the like. Under different models, except that the fifth control panel providing energy is different, other control panels are the same, and the universalization and the modular design of the control panels are realized. The cost can be effectively reduced, and the operation maintenance and the later iteration upgrading of the circuit breaker are facilitated.

Four square lugs are designed at two ends of the upper cover, and a circular through hole is designed in each lug, so that the second upper cover can be fixed on the first middle cover through screw connection. The design has convex handle structure at the both ends of upper cover, can make the secondary part go up plug operation occasionally fine stress point on the primary part, and the staff of being convenient for uses.

The whole secondary part is designed into an independent module, and hot plug operation in the running process of the circuit breaker can be realized. The whole control part of the circuit breaker is integrated into one part, and only one secondary part needs to be replaced when the circuit breaker is maintained and is subjected to later iteration upgrading, so that the replacement cost is reduced, and the service life of the whole circuit breaker is prolonged. The circuit breaker is independent of the other circuit breaker for the first time and the second time, and the reliability of the circuit breaker is improved. Inside control panel of whole secondary part also designs into independent little module one by one, mutual independence between each little module, if a certain control panel takes place to damage, change that can the minimum cost, each little module of different model circuit breakers can be general, has reduced part cost, has improved the commonality between the product, and the convenience is maintained the operation of all circuit breakers.

In addition, as shown in fig. 36 to 39, fig. 36 is a schematic view of the internal structure of the secondary part, fig. 37 is a schematic view of the structure of the secondary base, fig. 38 is a schematic view of the control board of the secondary part, and fig. 39 is a schematic view of the structure of the upper cover. The reference numeral 205 is a first control board, the reference numeral 206 is a second control board, the reference numeral 207 is a third control board, the reference numeral 208 is a fourth control board, the reference numeral 209 is a fifth control board, the reference numeral 210 is a carrier module, the reference numeral 211 is a 64-bit european plug, the reference numeral 212 is a 10P external plug, the reference numeral 213 is a 12P european plug, the reference numeral 214 is a toggle switch, the reference numeral 215 is a 2P external plug, the reference numeral 216 is a key, the reference numeral 217 is a liquid crystal panel, the reference numeral 218 is a capacitor, the reference numeral 219 is an indicator light, and the reference numeral 220 is a light guide column.

The working method of the embodiment of the application is as follows:

and (3) electric switching-on, namely when the switch needs electric switching-on, the magnetic control driving mechanism is in a separation state, and the static iron core and the movable iron core need to be closed. A control board in the circuit breaker sends a closing instruction, a capacitor discharges electricity, energy information is transmitted to a 12P European-style socket of a magnetic control driving mechanism and then transmitted to a coil part, the coil obtains positive electricity, so that a static iron core and a movable iron core generate magnetic force, the movable iron core moves downwards, then a transition plate, a guide seat and a guide rod move downwards, the movable iron core compresses a pressure spring downwards, when the static iron core and the movable iron core are closed, the pressure spring is in a limit compression state, the guide rod moves to drive a rotating shaft assembly device to rotate downwards to drive a movable contact knife to close, the movable contact knife is tightly pressed on a static contact device, a main circuit of the circuit breaker is connected, and a switch is in a closing state. The guide seat does not extrude the elastic sheet of the second microswitch any more, the microswitch releases a closing signal, the signal is transmitted to the control panel in the switch, and the switch acquires the information of the closing state at the moment. At the moment, even if power supply is removed, the static iron core and the movable iron core can still keep magnetic force, and the magnetic control driving mechanism can still keep an on-position state.

Electric brake opening: when the switch needs to be electrically opened, the magnetic control driving mechanism is in an on-position state at the moment, a control panel in a separated breaker of the static iron core and the movable iron core needs to send a closing instruction, the capacitor discharges, energy information is transmitted to a 12P European-type socket of the magnetic control driving mechanism and then is transmitted to a coil part, and the coil obtains reverse electricity, so that the internal magnetic field of the static iron core and the movable iron core is disturbed, and the static iron core and the movable iron core lose magnetism. The pressure spring in the limit compression state relieves the constraint of magnetic force of the iron core, the pressure spring begins to rebound, so that the movable iron core moves upwards, the transition plate, the guide seat and the guide rod are sequentially driven to move upwards until the transition plate touches the top plate, the pressure spring is limited, the pressure spring does not rebound upwards any more, the two iron cores of the magnetic control driving mechanism are in a separated state, the guide rod moves to drive the rotating shaft assembly device to rotate upwards, the movable contact knife is driven to be separated from a brake, the movable contact knife leaves the static contact device, arc is drawn, electric arc is sucked into the arc extinguishing cover device, a main circuit of the circuit breaker is disconnected, and the switch is in a separated brake state. The guide seat extrudes the elastic sheet of the second microswitch, triggers the opening signal of the microswitch, the signal is transmitted to the control panel in the switch, and the switch acquires the information of the separated state at the moment.

Manual brake opening: when the brake is manually opened, the magnetic control driving mechanism is in a closed state, and the direction of the cap points to one side close to the power supply side of the circuit breaker. The handle is sleeved on the cap, the handle is pulled by hand, and when the pulling force overcomes the holding magnetic force of the two iron cores, the connecting lever swings relative to the first support, so that the two pins on the connecting lever swing towards the direction far away from the power supply side of the circuit breaker. The pin on the crank arm slides on the sliding groove of the guide seat, so that the guide seat is driven to move upwards, the transition plate and the movable iron core are sequentially driven to move upwards, the pressure spring is used for relieving the pressing of magnetic force, the pressure spring is also quickly rebounded, the movable iron core is accelerated to be away from the static iron core, the transition plate is finally contacted with the top plate, the rotating shaft assembly device is also driven by the guide rod to be quickly away from the static contact device, a main loop of the circuit breaker is disconnected, and the quick manual brake opening is realized.

Manual closing: when the circuit breaker is manually switched on, the magnetic control driving mechanism is in an off-position state, and the direction of the cover cap points to one side close to the load side of the circuit breaker. The handle is pulled by hand, and when the tension overcomes the compression force of the spring, the handle drives the cap and the crank arm to swing relative to the first support. The two pins on the crank arm swing towards the direction far away from the load side of the switch. The pin on the crank arm slides on the sliding groove of the guide seat, so that the guide seat is driven to move downwards, the transition plate and the movable iron core are sequentially driven to move downwards until the movable iron core is contacted with the static iron core, and the spring is compressed to the limit position. The second microswitch sends out a switch-on position signal. After the circuit breaker receives the position signal information, the electric capacity sends energy signal, transmits to 12P european style end seat department, and then transmits to the coil position, makes two closed magnetic control iron cores take magnetism in the twinkling of an eye to make two iron cores keep closing, and then make the movable contact sword of pivot assembly tightly compress tightly on the stationary contact copper bar, the switch-on of circuit breaker major loop realizes manual combined floodgate.

And (3) replacing the secondary part with electricity: when the circuit breaker normally operates for a certain period, the electronic hardware of the secondary part is aged and needs to be replaced, the parts of the primary part can be normally used, the screws connected with the primary part and the secondary part at the two ends of the upper cover are removed, the secondary part needing to be replaced is pulled out in an electrified mode, the 64-bit European plug and socket and the 12P European plug and socket are mutually separated, the data transmission between the secondary part and the integrated mutual inductor and the magnetic control driving mechanism is disconnected, then the new secondary part is replaced, the data connection is realized by mutually inserting the 64-bit European socket and the 12P European plug and socket, and the new secondary part and the old primary part are fixed through the screws to complete the electrified replacement of the secondary part.

The technical effects of the embodiments of the present application include, but are not limited to, the following:

1. this split type magnetic control snap action type circuit breaker of a secondary, a secondary adopts the modularized design, but the whole plug of secondary is changed, has improved the life of product, and a secondary module is mutually independent, has improved the reliability of product.

2. A plurality of parts in the primary part adopt modular design, and each module is relatively independent, receives interference factor little, and convenient assembling can realize automatic assembly, and the product flexibility is high.

3. The design has independent secondary control part, and a plurality of control panels of secondary part adopt the universalization design, and different models all can be general, improves the flexibility of product, makes things convenient for the operation maintenance of product, reduce cost.

4. The design has the integral type mutual-inductor of integrated multiple perception function, can acquire voltage, temperature, the current information of circuit breaker in real time, realizes the comprehensive dynamic monitoring to the product. Can adopt straight copper bar installation, improve assembly efficiency, practice thrift the inner space of product simultaneously.

5. The design has magnetic control actuating mechanism, can drive the quick completion separating brake of circuit breaker, combined floodgate operation, improves the breaking performance of product. The manual opening and closing device is designed on the magnetic control driving mechanism, the requirements of manual opening and manual closing of the circuit breaker are met, the switch can still be used in some harsh scenes, and the application range of the circuit breaker is widened.

6. Compared with the traditional spring type circuit breaker, the magnetic control quick-acting circuit breaker has fewer body parts, more reasonable transmission mode and part arrangement of the parts, and reduced production cost of products while prolonging the service life.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the claims.

Claims

1. A split type magnetic control snap action type circuit breaker of a secondary, its characterized in that includes:

2. The primary-secondary split-type magnetically controlled snap-action circuit breaker according to claim 1, wherein the primary base mechanism comprises a first base, a first middle cover, and a first bottom plate, the first middle cover is mounted on the first base, the first bottom plate is disposed on the bottom side of the first base, the first base is internally divided into an a-phase channel, a B-phase channel, a C-phase channel, and an N-phase channel, and the first base has a power supply side at a head end and a load side at a tail end.

3. The secondary split type magnetic control snap-action circuit breaker according to claim 2, wherein the static contact device is mounted on the power supply side of the first base, the static contact device includes a static contact copper bar, a static contact, a first protection cover and an arc striking copper bar, the static contact and the arc striking copper bar are disposed on the static contact copper bar, the static contact is used for contacting with or separating from the movable contact knife during opening and closing operations, the arc striking copper bar is used for guiding an electric arc into the arc extinguishing cover during opening and closing operations, the static contact copper bar is bent, and the first protection cover is mounted on the static contact copper bar.

4. The secondary split type magnetically controlled snap-action circuit breaker according to claim 3, further comprising an arc-extinguishing chamber device, wherein the arc-extinguishing chamber device is installed on the upper side of the static contact device, the arc-extinguishing chamber device comprises an arc-extinguishing chamber, a second protective cover, a third baffle and a fourth baffle, the arc-extinguishing chamber is of a grid-plate type structure, and the second protective cover shields the arc-extinguishing chamber, the third baffle and the fourth baffle; when the switch is opened, the generated electric arc is attracted to the grid of the arc-extinguishing shield by the arc-striking copper bar of the static contact device, the electric arc further reaches the third baffle plate through the grid of the arc-extinguishing shield, blows out from the hole in the third baffle plate and blows towards the fourth baffle plate, and the fourth baffle plate responds to the bending and generates a gap so that the electric arc leaves the circuit breaker.

5. The secondary split type magnetic control quick-acting circuit breaker according to claim 2, wherein the rotating shaft assembly device is located at the rear side of the static contact device, the rotating shaft assembly device comprises three movable contact knives, three first torsion springs and a rotating shaft knife sleeve, a plurality of cylinders are arranged at the middle part and two sides of the rotating shaft knife sleeve, the cylinders are embedded with the semi-arc grooves of the first base, and the rotating shaft knife sleeve can rotate relative to the first base; the rotating shaft knife rest is characterized in that three cavities are arranged in the rotating shaft knife rest and respectively comprise an A-phase cavity, a B-phase cavity and a C-phase cavity, a movable knife and a first torsion spring are installed in each cavity, the movable knife is fixed in the rotating shaft knife rest through the first torsion spring, a hole site for penetrating a first pin shaft is formed in the front end of each cavity, through holes are formed in the hole sites of the A-phase cavity and the C-phase cavity, the first pin shaft reaches the B-phase cavity through the A-phase cavity or the C-phase cavity, the hole site of the B-phase cavity is a blind hole, and the first pin shaft is fixed on the B-phase cavity.

6. The primary and secondary split type magnetically controlled snap-action circuit breaker according to claim 5, wherein the primary base mechanism further comprises a pressing plate fixed on the first base and used for fixing the magnetically controlled driving mechanism, the bottom surface of the pressing plate is provided with a plurality of semi-cylindrical grooves for limiting the cylinder; the pressure plate is provided with a through hole which is used for penetrating the guide rod and enabling the guide rod to do direct motion along the direction vertical to the pressure plate; the pressure plate is also provided with a plurality of rib structures for enhancing the structural strength.

7. The primary and secondary split type magnetic control quick-acting circuit breaker according to claim 5, wherein one end of the guide rod is a bifurcated arched sheet metal part, the other end of the guide rod is two cylindrical rods with different diameters, the arched sheet metal part is provided with a rectangular hole, one end of the first pin shaft is fixed in the B-phase cavity, and the other end of the first pin shaft is located on the rectangular hole of the arched sheet metal part.

8. The secondary split type magnetic control quick-acting circuit breaker according to claim 4, wherein the primary base mechanism further comprises a magnetic backup protection device and an integrated transformer, the number of the movable contact knives is three, the soft copper wires are welded at the tail parts of the movable contact knives, small copper bars are welded at the tail parts of the soft copper wires, through holes are formed in the small copper bars, third copper bars are installed at the load side of the N-phase channel, the second protection cover is installed on the upper part of the third copper bars, the third baffle plate and the fourth baffle plate are installed on the rear side of the second protection cover, the first baffle plate is clamped on the first base, the three small copper bars are respectively connected with first copper bars, the third copper bars are connected with the second copper bars, the first copper bars of the A phase, the B phase and the C phase respectively penetrate through the magnetic backup protection device and the integrated transformer and are fixed on the first base, and the third copper bars of the N phase penetrate through the integrated transformer and are fixed on the first base.

9. The secondary split type magnetic control quick-acting circuit breaker according to claim 8, wherein the magnetic backup protection device comprises a third protection cover, a fourth protection cover, a moving iron sheet, a second pin shaft, a frame, a static iron sheet, a 2P terminal plug and a first micro-gap switch, the magnetic backup protection device is located at the rear side of the small copper bar and fixed on the first base, the third protection cover and the fourth protection cover are connected through a buckle, the bottom of the third protection cover and the bottom of the fourth protection cover are provided with a first clamping groove for fixing the static iron sheet, the static iron sheet is fixed on the first base, the frame is fixed on the static iron sheet, the frame is connected through the second pin shaft and the moving iron sheet, the moving iron sheet is provided with a crank arm structure, the second pin shaft is provided with a second torsion spring, the second torsion spring is respectively clamped by the moving iron sheet and the frame, so that the moving iron sheet is in an original state that the first micro-gap switch is not touched, the fourth protection cover is provided with a round shaft for installing a real-time first switch, the first pin shaft is electrically connected with the first micro-gap switch plug, and the second protection plug is electrically connected with the P terminal plug and the second micro-gap switch.

10. The secondary split type magnetic control snap-action circuit breaker according to claim 8, characterized in that a power supply side voltage is installed on one side of the bottom surface of the first base to get a power terminal, the power supply side voltage gets the power terminal respectively with first base opposite side A looks, B looks and C looks the stationary contact copper bar and N looks the third copper bar communicates with each other, load side voltage sampling terminal and load side temperature sampling terminal are installed on the other side of the bottom surface of the first base, the load side voltage sampling terminal respectively with first base opposite side A looks, B looks and C looks the first copper bar communicates with each other, load side temperature sampling terminal respectively with A looks, B looks and C looks the second copper bar communicates with each other with N looks the first copper bar and N looks, the power supply side voltage gets the power terminal, load side voltage sampling terminal and load side temperature sampling terminal with the integral type mutual inductor is electrically connected.