CN219017559U - Two-time split magnetic control quick-action type circuit breaker - Google Patents

Abstract

The application provides a split type magnetic control quick-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 fixed contact device, the rotating shaft assembly device is provided with a movable contact knife, and one end of the guide rod is connected to the rotating shaft assembly device; the magnetic control driving mechanism comprises a supporting plate, a third circuit board, a top plate, a plurality of guide posts, a fifth protecting cover, a static iron core, a coil, a movable iron core, a transition plate, a guide seat and a second micro switch, wherein the supporting plate, the static iron core, the movable iron core, the transition plate and the guide seat are provided with guide rods in a penetrating way; the secondary part comprises a secondary shell part and a control board part, the secondary shell part is movably arranged on the primary part, the control board part is in communication connection with the third circuit board, and the control board 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 blade of the rotating shaft assembly device to contact or separate from the static contact device.

Description

Two-time split magnetic control quick-action type circuit breaker

Technical Field

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

Background

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

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a two-time split type magnetic control quick-action type circuit breaker, which is convenient to assemble, can rapidly complete opening and closing operations, and can further improve the service life of products.

In a first aspect, an embodiment of the present application provides a two-stage split type magnetic control quick-action circuit breaker, 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 fixed 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 third circuit board, a top plate, a plurality of guide posts, a fifth protecting cover, a static iron core, a coil, a movable iron core, a transition plate, a guide seat and a second micro switch, wherein the third circuit board is arranged on the supporting plate, the guide posts are arranged on the supporting plate and the top plate, the guide posts are wrapped by the fifth protecting cover, the static iron core is fixed on the supporting plate, the coil is arranged in the static iron core, a pressure spring is arranged between the movable iron core and the static iron core, the movable iron core is fixed on the transition plate, the upper part of the transition plate is limited by the top plate, the guide seat is fixed on the transition plate, the guide rod penetrates through the supporting plate, the static iron core, the movable iron core, the transition plate and the guide seat, and the elastic sheet of the second micro switch is pressed down by the guide seat when the circuit breaker is in a switching-off state; when the circuit breaker is in a closing state, the elastic piece of the second micro switch is in a releasing state;

The secondary part comprises a secondary shell part and a control board part, wherein the secondary shell part is movably arranged on the primary part, the control board part is arranged on the secondary shell part and is in communication connection with the third circuit board, the control board 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 blade of the rotating shaft assembly device to contact with the static contact device or separate from the static contact device.

According to some embodiments of the present application, the primary base mechanism includes 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 a bottom side of the first base, an inner portion of the first base is an a-phase channel, a B-phase channel, a C-phase channel and an N-phase channel, a head end of the first base is a power source side, and a tail end of the first base is a load side.

According to some embodiments of the present application, the static contact device is installed the power supply side of first base, the static contact device includes static contact copper bar, static contact, first protective cover and striking copper bar, the static contact with the striking copper bar set up in on the static contact copper bar, the static contact be used for when the divide-shut brake action with moving contact sword contact or separation, the striking copper bar is arranged in guiding the electric arc to the arc-extinguishing chamber when the divide-shut brake is operated, the static contact copper bar shape is the curved, first protective cover is installed on the static contact copper bar.

According to some embodiments of the present application, the device further comprises an arc-extinguishing chamber device, 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 protection cover, a third baffle plate and a fourth baffle plate, the arc-extinguishing chamber is in a grid-plate type structure, and the second protection cover shields the arc-extinguishing chamber, the third baffle plate and the fourth baffle plate; the arc generated during the opening operation is attracted into the grid plate of the arc extinguishing cover by the arc striking copper bar of the static contact device, the arc also passes through the grid plate of the arc extinguishing cover to reach the third baffle plate, and is blown out of the hole in the third baffle plate and towards the fourth baffle plate, and the fourth baffle plate is bent in response to generate a gap so as to enable the arc to leave the circuit breaker.

According to some embodiments of the present application, the rotating shaft assembly device is located at the rear side of the fixed contact device, the rotating shaft assembly device includes three movable contact blades, three first torsion springs and a rotating shaft cutter sleeve, the middle part and two side parts of the rotating shaft cutter sleeve are provided with a plurality of cylinders, the cylinders are in clamping and embedding arrangement with the semicircular grooves of the first base, and the rotating shaft cutter sleeve can perform rotary motion relative to the first base; the rotary shaft cutter sleeve is internally provided with three chambers, the three chambers are an A-phase chamber, a B-phase chamber and a C-phase chamber respectively, each chamber is provided with a movable contact cutter and a first torsion spring, the movable contact cutter is fixed in the rotary shaft cutter sleeve through the first torsion spring, the front end of the chamber is provided with a hole site for penetrating through a first pin shaft, the hole sites of the A-phase chamber and the C-phase chamber are through holes, the first pin shaft reaches the B-phase chamber through the A-phase chamber or the C-phase chamber, the hole site of the B-phase chamber is a blind hole, and the first pin shaft is fixed on the B-phase chamber.

According to some embodiments of the present application, the primary base mechanism further comprises a pressing plate, wherein the pressing plate is fixed on the first base and is 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 are used for limiting the cylinder; the pressing plate is provided with a through hole, and the through hole is used for penetrating the guide rod and enabling the guide rod to move in a direct motion mode along the direction perpendicular to the pressing plate; the pressing plate is also provided with a plurality of rib structures for reinforcing the structural strength.

According to some embodiments of the application, one end of the guide rod is a bifurcated arched sheet metal part, the other end of the guide rod is a cylindrical rod with two 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.

According to some embodiments of the application, the primary base mechanism further comprises a magnetic backup protection device and an integrated transformer, the number of the movable contact blades is three, the tail parts of the movable contact blades are welded with annealed copper wires, the tail parts of the annealed copper wires are welded with small copper wires, the small copper wires are provided with through holes, a third copper wire is installed at the load side of the N-phase channel, a first baffle is installed at the upper part of the third copper wire, the first baffle is clamped on the first base, the three small copper wires are respectively connected with a first copper wire, the third copper wires are connected with a second copper wire, the first copper wires of the A phase, the B phase and the C phase respectively penetrate through the magnetic backup protection device and the integrated transformer and then are fixed on the first base, and the third copper wires of the N phase penetrate through the integrated transformer and then are fixed on the first transformer.

According to some embodiments of the present application, the magnetic backup 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, the magnetic backup protection device is located little copper bar's rear side and fix 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 it is connected to move the iron sheet, it is provided with turning arm structure to move on the iron sheet, install the second torsional spring respectively the screens move the iron sheet with the frame, so that move the iron sheet is in the first micro-gap switch's of initial state, be provided with on the fourth safety cover and be used for first round pin switch's installation first round pin axle with the first P terminal corresponds with the first plug 2P of integrative plug is connected to the first P terminal.

According to some embodiments of the present application, a power supply side voltage electricity taking terminal is installed on one side of the bottom surface of the first base, the power supply side voltage electricity taking terminal is respectively communicated with the static contact copper bars of the phase a, the phase B and the phase C and the third copper bars of the phase N of 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 phase a, the phase B and the phase C of the other side of the first base, the load side temperature sampling terminal is respectively communicated with the first copper bars of the phase a, the phase B and the phase C and the second copper bars of the phase N, and the power supply side voltage electricity taking terminal, the load side voltage sampling terminal and the load side temperature sampling terminal are electrically connected with the integrated transformer.

According to the technical scheme of the embodiment of the application, the technical effects include but are not limited to the following: according to the split magnetic control quick-action circuit breaker for the second time, the second time part adopts a modularized design, the second time part is integrally pluggable and replaceable, the service life of a product is prolonged, the second time modules are mutually independent, and the reliability of the product is improved. And the magnetic control driving mechanism is designed, so that the breaker can be driven to rapidly finish opening and closing operations, and the breaking performance of the product is improved. Therefore, the two-time split type magnetic control quick-action type circuit breaker of the embodiment of the application is convenient to assemble, can rapidly complete opening and closing operations, and can further improve the service life of products.

Additional aspects and advantages of the 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 application.

Drawings

The accompanying drawings are included to provide a further understanding of the technical aspects of the present application, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present application and together with the examples of the present application, and not constitute a limitation of the technical aspects of the present application.

FIG. 1 is a schematic diagram of a two-stage split magnetic control quick-action molded case circuit breaker;

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

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

FIG. 4 is a schematic view of the underside of the primary base unit;

FIG. 5 is a first internal schematic view of the primary base unit;

FIG. 6 is a second internal schematic view of the primary base unit;

FIG. 7 is a schematic view of a stationary contact apparatus;

FIG. 8 is an exploded view of the stationary contact apparatus;

fig. 9 is a schematic diagram of an arc chute apparatus;

fig. 10 is an exploded view of the arc chute apparatus;

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

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

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

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

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

FIG. 16 is a schematic illustration of the connection of the guide bar, spindle assembly and platen;

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

FIG. 18 is a schematic view of the interior of the magnetic backup protection device;

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

FIG. 20 is a first base bottom surface terminal trace;

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

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

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

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

FIG. 25 is a schematic view of a housing structure;

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

fig. 27 is an integrated transformer and connection assembly thereof;

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

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

FIG. 30 is a schematic diagram 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 magnetic drive mechanism;

FIG. 33 is a handle mounting schematic;

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

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

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

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

FIG. 38 is a schematic view of a secondary section control board;

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

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary 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 references to orientation descriptions, such as directions of up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, the meaning of a number is one or more, the meaning of a number is two or more, greater than, less than, exceeding, etc. are understood to not include the present number, and the meaning of a number above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed 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 explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical solution.

In some cases, molded case circuit breakers are widely used in the field of distribution networks, photovoltaics, and new energy. The operating mechanism of the traditional molded case circuit breaker is spring type, the quantity of parts is large, the structure is complex, the abrasion is easy, the service life is low, the intelligent level of the traditional molded case circuit breaker is low, the opening and closing speed is low, the time and the labor are wasted, and the working condition requirement of the current rapid intelligent control cannot be met. In addition, the traditional molded case circuit breaker can not realize primary and secondary modularization and can not realize uninterrupted maintenance. When the primary part can normally work, the secondary control system is aged and damaged, so that the whole breaker is scrapped, and the synchronization of the primary service life and the secondary service life cannot be realized, thereby causing the waste of resources.

Based on the above-mentioned circumstances, the embodiment of the application provides a two-shot split type magnetic control quick-action type circuit breaker, and not only convenient assembling can also accomplish the divide-shut brake operation fast moreover to can also improve the life of product.

In one embodiment, a two-stage split magnetically controlled quick-action type 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 fixed 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 third circuit board, a top plate, a plurality of guide posts, a fifth protecting cover, a static iron core, a coil, a movable iron core, a transition plate, a guide seat and a second micro switch, wherein the third circuit board is arranged on the supporting plate; when the circuit breaker is in a closing state, the elastic piece of the second micro switch is in a releasing state;

The secondary part comprises a secondary shell part and a control board part, wherein the secondary shell part is movably arranged on the primary part, the control board part is arranged on the secondary shell part, the control board part is used for being in communication connection with a third circuit board, the control board 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 blade of the rotating shaft assembly device to contact with the static contact device or separate from the static contact device.

In an embodiment, the primary base mechanism includes 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 a bottom side of the first base, an inner portion of the first base is an a-phase channel, a B-phase channel, a C-phase channel and an N-phase channel, a head end of the first base is a power source side, and a tail end of the first base is a load side.

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

In an embodiment, the device further comprises an arc-extinguishing cover device, wherein the arc-extinguishing cover device is arranged on the upper side of the fixed contact device and comprises an arc-extinguishing cover, a second protection cover, a third baffle and a fourth baffle, the arc-extinguishing cover is of a grid-plate type structure, and the second protection cover shields the arc-extinguishing cover, the third baffle and the fourth baffle; the arc generated during the opening operation is attracted into the grid plate of the arc-extinguishing cover by the arc-striking copper bar of the static contact device, the arc also reaches the third baffle plate through the grid plate of the arc-extinguishing cover, and is blown out from the hole in the third baffle plate to the fourth baffle plate, and the fourth baffle plate is bent in response to generate a gap so as to lead the arc to leave the circuit breaker.

In one embodiment, the rotating shaft assembly device is positioned at the rear side of the fixed contact device, the rotating shaft assembly device comprises three movable contact blades, three first torsion springs and a rotating shaft cutter sleeve, a plurality of cylinders are arranged at the middle part and two side parts of the rotating shaft cutter sleeve, the cylinders are in clamping arrangement with the semicircular grooves of the first base, and the rotating shaft cutter sleeve can rotate relative to the first base; there are three cavities in the pivot knife housing, three cavities are A phase cavity, B phase cavity and C phase cavity respectively, every cavity all installs a movable contact sword and a first torsional spring, the movable contact sword is fixed in the pivot knife housing through first torsional spring, the front end of cavity is provided with the hole site that is used for passing first round pin axle, wherein, the hole site of A phase cavity and C phase cavity is the through-hole, first round pin axle passes through A phase cavity or C phase cavity and reaches B phase cavity, the hole site of B phase cavity is the blind hole, first round pin axle is fixed in on the B phase cavity.

In one embodiment, the primary base mechanism further comprises a pressing plate, wherein 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 pressing plate is provided with a through hole, and the through hole is used for penetrating the guide rod and enabling the guide rod to move in a direct motion along the direction perpendicular to the pressing plate; the pressing 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 provided with 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 positioned 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 transformer, the number of the movable contact blades is three, the tail parts of the movable contact blades are welded with annealed copper wires, the tail parts of the annealed copper wires are welded with small copper bars, the small copper bars are provided with through holes, a third copper bar is installed at the load side of the N-phase channel, a second protection cover, a third baffle and a fourth baffle are installed on the upper portion of the third copper bar, a first baffle is installed on the rear side of the second protection cover, the first baffle is clamped on the first base, the three small copper bars are respectively connected with the 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 are respectively fixed on the first base after passing through the magnetic backup protection device and the integrated transformer, and the third copper bars of the N phase are fixed on the first base after passing through the integrated transformer.

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 frame, a static iron sheet, a 2P terminal plug and a first micro switch, wherein 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 in a buckling manner, a first clamping groove for fixing the static iron sheet is formed in the bottoms of the third protection cover and the fourth protection cover, the static iron sheet is fixed on the first base, a frame is fixed on the static iron sheet, the frame is connected with the movable iron sheet through the second pin shaft, a crank arm structure is arranged on the movable iron sheet, a second torsion spring is arranged on the second pin shaft, the movable iron sheet and the frame are clamped respectively, so that the movable iron sheet is in an original state of not touching the first micro switch, a round shaft 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 2P terminal plug is connected with the integrated transformer.

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

Embodiments of the present application are further described below with reference to the accompanying drawings.

As shown in fig. 1, fig. 1 is a schematic diagram of a two-time split type magnetic control quick-action molded case circuit breaker, wherein a component 1 is a primary part, and a component 2 is a secondary part. As can be seen from fig. 1, the magnetically controlled quick-action molded case circuit breaker is divided into a primary part and a secondary part. The primary part is a main circuit body part of the circuit breaker, and the secondary part is a control part of the circuit breaker.

As shown in fig. 2, fig. 2 is a schematic view of the primary part, wherein the reference numeral 11 is a primary base mechanism, the reference numeral 12 is a magnetic control driving mechanism, and the reference numeral 13 is a cap. As can be seen from fig. 2, the primary part is composed of a primary base mechanism, a magnetic control driving mechanism and a cap.

As shown in fig. 3 and 4, fig. 3 is a schematic front view of the primary base unit, and fig. 4 is a schematic bottom view of the primary base unit, wherein reference numeral 100 denotes a first base, reference numeral 101 denotes a first middle cover, and reference numeral 103 denotes a first bottom plate.

In one embodiment, the primary base mechanism housing portion includes a first base, a first middle cap mounted to the first base by 10 screws, and a first bottom plate, the first base and the first middle cap being DMC material with a flame retardant rating of V0. The first bottom plate is adhered to the bottom side of the first base, and the material is epoxy resin. The first base has four channels, namely 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 reference numeral 104 is an arc extinguishing chamber device, reference numeral 105 is a pressure plate, reference numeral 106 is a first baffle, reference numeral 107 is a guide rod, reference numeral 108 is a magnetic backup protection device, reference numeral 109 is an integrated transformer, and 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, wherein reference numeral 111 is a stationary contact device, reference numeral 112 is a rotary shaft assembly device, reference numeral 113 is a small copper bar, reference numeral 114 is a first copper bar, reference numeral 115 is a second copper bar, reference numeral 116 is a third copper bar, and reference numeral 117 is a hexagon socket head cap screw.

In an embodiment, the primary base mechanism comprises an arc extinguishing chamber device, a pressing plate, a first baffle plate, a guide rod, a magnetic backup protection device, an integrated transformer, a second baffle plate, a fixed 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, and fig. 8 is an exploded view of the static contact device, wherein a reference numeral 118 is a static contact copper bar, a reference numeral 119 is a static contact, a reference numeral 120 is a first protective cover, and a reference numeral 121 is an arc striking copper bar.

In an embodiment, the fixed contact device is mounted on the power supply side of the first base through screws and comprises a fixed contact copper bar, a fixed contact, a first protection 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 in the switching operation, and the arc striking copper bar has the function of guiding an arc generated by switching into the arc extinguishing chamber when the circuit breaker is switched off. The static contact copper bar is in a bent shape, so that the current flowing in the static contact is opposite to the current flowing in the power side and the load side of the circuit breaker, and the arc extinguishing capability of the product is improved. The first protection cover is arranged on the static contact copper bar, so that current generated when the circuit breaker is disconnected is prevented from being attracted by the static contact copper bar, the generated arc is disordered, and the arc extinguishing capability of a product is improved. The breaker has three fixed contact devices which are respectively positioned on 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 an arc-extinguishing chamber device, and fig. 10 is an exploded view of an arc-extinguishing chamber device, wherein a reference numeral 122 is a second protection cover, a reference numeral 123 is an arc-extinguishing chamber, a reference numeral 124 is a third baffle, and a reference numeral 125 is a fourth baffle.

In an embodiment, the arc-extinguishing chamber device is arranged on the upper side of the fixed contact device and comprises an arc-extinguishing chamber, a second protection cover, a third baffle plate and a fourth baffle plate. The arc extinguishing cover is in a grid structure, two sides are provided with epoxy resin plates, the middle is provided with electrician pure iron grid plates, and the arc extinguishing cover is welded on the epoxy resin plates at the two sides. The second baffle is made of epoxy resin, a plurality of rows of small holes are formed in the plate, and the third baffle is made of glass paper board and has stronger elasticity and bending performance. When the breaker is opened, generated electric arcs are attracted into grid plates in the arc-extinguishing cover by arc-striking copper bars of the static contact device, arc is extinguished in the arc-extinguishing cover, if the generated electric arcs are overlarge, current reaches the third baffle plate through the grid plates of the arc-extinguishing cover and blows out from small holes in the third baffle plate, and when the electric arcs blow to the fourth baffle plate, the fourth baffle plate is softer and bends, and generated gaps enable the electric arcs to leave the breaker. The breaker has three complete arc-extinguishing chamber devices respectively positioned on ABC three phases, and N phases do not participate in arc extinction. The N phase is provided with a second protective cover, a third baffle and a fourth baffle.

In addition, as shown in fig. 11 and 12, fig. 11 is a schematic view of a rotating shaft assembly, and fig. 12 is a fixed schematic view of the rotating shaft assembly, wherein a reference numeral 126 is a movable contact 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 fixed contact device and comprises three movable contact blades, three first torsion springs and a rotating shaft blade sleeve, wherein four cylinders are shared in the middle part and two side parts of the rotating shaft blade sleeve, the rotating shaft blade sleeve is clamped by the semicircular arc grooves of the first base and the semicircular arc grooves of the pressing plate at the same time, and the rotating shaft blade sleeve can rotate relative to the first base. The rotary shaft cutter sleeve is internally provided with three chambers which respectively correspond to the A-phase chamber, the B-phase chamber and the C-phase chamber, a movable contact cutter and a first torsion spring are respectively arranged, the movable contact cutter is fixed in the rotary shaft cutter sleeve through the first torsion spring, and the three chambers are provided with the A/B/C three-phase movable contact cutter from left to right.

Further, as shown in fig. 13, fig. 13 is a schematic view of the rotary shaft cutter case. In an embodiment, at the front end of the three chambers of the rotary shaft knife sleeve, a hole site capable of penetrating through the first pin shaft is provided, wherein the hole sites of the A-phase chamber and the C-phase chamber are through holes, the first pin shaft can be communicated to the B-phase chamber through the rightmost or leftmost chamber, the B-phase chamber is a blind hole, and the first pin shaft can be fixed on the B-phase chamber.

As shown in fig. 14 and 15, fig. 14 is a schematic view of the top surface of the platen, and fig. 15 is a schematic view of the bottom surface of the platen.

In an embodiment, the material of clamp plate has higher wearability and self-lubricating performance, and the top surface design of clamp plate has 4 through-holes, can fix the clamp plate on first base through four screws, has four blind holes in the outside position design respectively of four through-holes, has cylindrical insert nut in every blind hole, can be used for fixed magnetic control actuating mechanism. Four extending semicircular column grooves are designed on the bottom surface of the pressing plate and are used for limiting and fixing the rotating shaft assembly. The center of the pressing plate is provided with a through hole which can enable the guide rod to pass through and has a limiting function on the guide rod, so that the guide rod can only perform direct motion perpendicular to the direction of the pressing plate. The pressure plate is provided with a plurality of rib structures, so that the structural strength can be effectively improved while the weight of parts is reduced, the pressure plate is prevented from bending, and the pressure plate can bear the dual pressure under the combined action of the rotating shaft assembly and the magnetic control driving mechanism.

One end of the guide rod is a bifurcated arched sheet metal part, one end of the guide rod is two cylindrical rods with different diameters, and the arched 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 is from the right side or the left side cavity of pivot knife cover to the centre leading to B looks cavity department, and the one end of first round pin axle is fixed in B looks cavity, and the other end is located the rectangle hole site on the arch sheet metal, because the guide arm is spacing by the B looks cavity of pivot knife cover, consequently the guide arm can't move about and rotate. The cylindrical rod of the guide rod passes 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 after double limiting of the pressing plate and the rotating shaft assembly.

The fixed pivot assembly of traditional moulded case circuit breaker needs to be fixed with two vertically sheet metal components to the sheet metal component can only beat the screw fixation from the bottom surface of first base, and the installation is very inconvenient, and the area of stress is few, after having experienced the deciliter action of thousands of circuit breakers, pivot knife cover is split by the recess of sheet metal component, and the life-span is lower. The clamp plate is adopted in this embodiment to be fixed, beats the screw from the top, easy to assemble to adopt four recesses spacing, the atress action point of pivot assembly becomes four points atress by original two points atress, and the atress area is more even, and mechanical working condition is more scientific, and the area of force is 5 times of traditional circuit breaker, effectively improves moulded case circuit breaker's life.

In addition, as shown in fig. 16, fig. 16 is a schematic diagram of connection between the guide rod, the rotating shaft assembly and the pressing plate. In one embodiment, copper flexible wires are welded at the tail parts of the three movable contact blades, small copper bars are welded at the tail parts of the annealed copper wires, and through holes are arranged in the small copper bars.

And a third copper bar is arranged at the N-phase load side through bolts, 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. The ABC three-phase first copper bar passes through the magnetic backup protection device and the integrated transformer respectively and is fixed on the first base through screws. The third copper bar of N phase passes through integral type mutual-inductor, fixes on first base through the screw. And the tail ends of the first copper bar and the third copper bar can be provided with inner hexagon bolts for connecting external cables.

As shown in fig. 17 to 19, fig. 17 is a schematic structural view of the magnetic backup protection device, fig. 18 is a schematic internal view of the magnetic backup protection device, and fig. 19 is an exploded view of the magnetic backup protection device. Wherein, the reference numeral 133 part is the third protection cover, the reference numeral 134 part is the fourth protection cover, the reference numeral 135 part is the moving iron sheet, the reference numeral 136 part is the second pin shaft, the reference numeral 137 part is the frame, the reference numeral 138 part is the static iron sheet, the reference numeral 139 part is the 2P terminal plug, the reference numeral 140 part is the first micro switch, and the reference numeral 141 part is the second torsion spring.

In an embodiment, the magnetic backup protection device comprises a third protection cover, a fourth protection cover, a moving iron sheet, a second pin shaft, a rack, a static iron sheet, a 2P terminal plug and a first micro switch. The circuit breaker designs totally has three magnetism backup protection device, 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 design respectively have two buckles that stretch out, and the upper and lower both sides of fourth safety cover design respectively have two recesses, and the third safety cover can mutually chucking with the fourth safety cover. The bottoms of the third protective cover and the fourth protective cover are provided with clamping grooves for the static iron sheet, so that the static iron sheet can be clamped and fixed. The bottom of the static iron sheet is provided with a threaded through hole, the third protective cover and the fourth protective cover are respectively provided with two semicircular through holes, and the first base and the static iron sheet can be fixed through screws. The static iron sheet is fixedly riveted with a frame, the frame is connected with the movable iron sheet through a second pin shaft, the movable iron sheet can swing freely, and an extending crank arm structure is designed on the movable iron sheet. The second torsion spring is arranged on the second pin shaft and respectively clamps the moving iron sheet and the frame, so that the moving iron sheet is in an original state of not touching the first micro switch. The fourth protective cover is provided with two extending circular shafts, a first micro switch can be installed on the circular shafts, the first micro switch is connected with the 2P terminal plug through an electric wire, and the third protective cover is provided with a clamping groove aiming at the 2P terminal plug, so that the 2P terminal plug can be fixed. The 2P terminal plug can be inserted with the integrated transformer to realize data transmission. The third protective cover and the fourth protective cover are respectively provided with a rectangular hole groove through which copper bars can be penetrated. Firstly, the first copper bar can pass through the frame part of the magnetic backup protection device, secondly, the first copper bar plays a guiding role in installation of the first copper bar, and the copper bar can conveniently and rapidly pass through the magnetic backup protection device

When the circuit breaker is internally provided with a large current which is 15 times higher than the rated current of the circuit breaker, a large magnetic field is generated near the rack, so that the moving iron sheet and the static iron sheet have magnetism, the moving iron sheet is attracted towards the direction of the static iron sheet due to the fixation of the static iron sheet, the swing of the moving iron sheet is triggered, then the crank arm structure of the moving iron sheet is enabled to touch and compress the elastic sheet of the first micro switch, the first micro switch is triggered, data are transmitted to the integrated transformer through the 2P terminal, and then the integrated transformer is transmitted to the secondary part, and the secondary part sends out related brake-separating instructions, so that the circuit breaker is braked. When the large current disappears, the moving iron sheet and the static iron sheet lose magnetism, and under the action of the second torsion spring, the moving iron sheet returns to the original state that the moving iron sheet cannot touch the first micro switch.

As shown in fig. 20, fig. 20 is a first base bottom terminal trace pattern. Wherein, reference numeral 130 is a power supply side voltage sampling terminal, reference numeral 131 is a load side voltage sampling terminal, and reference numeral 132 is a load side temperature sampling terminal.

In an embodiment, one side of the bottom surface of the first base is provided with a power supply side voltage electricity taking terminal through a screw, the power supply side voltage electricity taking terminal is respectively communicated with an ABC three-phase static contact copper bar and an N-phase third copper bar on the other side of the first base, the other side of the first base is provided with a load side voltage sampling terminal and a load side temperature sampling terminal through screws, the load side voltage sampling terminal is respectively communicated with an 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 an ABC three-phase first copper bar and an N-phase second copper bar. Three electricity taking and sampling terminals are finally plugged on the integrated transformer through a terminal plug by flexible wire wiring, and are transmitted to a secondary part by the transformer, so that the real-time monitoring of the voltage and the temperature of the circuit breaker is realized.

In addition, for the integrated transformer in 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 ring-shaped structures, the installation of the current transformer is inconvenient, the first method is to bend copper bars to penetrate through the current transformer, and the method wastes a large amount of space and is unchanged in installation. The second method is to cut the copper bar into several pieces, after the copper bar passes through the transformer, the copper bar is spliced by the screw, although the installation is convenient, the space is still wasted greatly, the cost is increased, the temperature rise at the joint of the screw can be too high, the performance of the transformer is affected, the third method is to use annealed copper wires at the part passing through the transformer, sleeve the coil of the transformer on the soft copper wires, and then weld the soft wires with the copper bars at other parts together, although the space is saved, the installation is also convenient, but when the transformer fails, the transformer cannot be taken out from the soft copper wires, and the flexibility is very low. And the traditional transformer can only realize current sampling and has single function. Based on the above, the embodiment of the application designs an integrated transformer integrating multiple sensing functions.

The integrated transformer is arranged at the rear side of the magnetic backup protection device and is fixed on the first base through screws. Comprising 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 socket, a row seat, a row needle, 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 the main body structure of the integrated transformer, is of a thin shell structure, is used for installing other parts, is provided with three through holes at the tail end of the top surface of the shell frame, and can be fixed on the first base through screw connection. Four annular channels are designed in the cavity in the shell frame, and the inner sides of the annular channels penetrate through the first copper bars of ABC three phases and the second copper bars of N phases. Four measuring current transformers, three protection current transformers and one leakage protection transformer are sleeved on the outer side of the 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 circuit breaker in real time. The protection current transformer is arranged on the ABC three phases and is used for monitoring the large current condition of the three phases, when the passing current exceeds a calibrated threshold value, such as 5 times to 15 times of rated current, data are transmitted to a secondary part through a circuit board assembly, and the secondary part sends out a related brake opening instruction to enable the breaker to be opened. The leakage protection transformer is of a runway type annular structure, the inner ring can penetrate through the ABCN four-phase copper bar, the copper bar can be directly inserted through the transformer without bending. Real-time data for monitoring leakage currents generated in circuit breakers. When the generated leakage current exceeds a predetermined threshold value, the circuit breaker is triggered to open.

As shown in fig. 21 to 27, fig. 21 is a schematic structural view of the integrated transformer, fig. 22 is an internal schematic view of the integrated transformer, fig. 23 is an exploded view of the integrated 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 an integrated transformer and a connection assembly thereof. Wherein, reference 142 part is the top cap, reference 143 part is the shell frame, reference 144 part is the circuit board subassembly, reference 145 part is the mutual inductor subassembly, reference 146 part is the measurement current transformer, reference 147 part is the protection current transformer, reference 148 part is the earth leakage protection mutual inductor, reference 149 part is the first circuit board, reference 150 part is 64 bit European socket, reference 151 part is row seat, reference 152 part is row needle, reference 153 part is voltage sampling terminal seat, reference 154 part is temperature sampling terminal seat, reference 155 part is the second circuit board, reference 156 part is voltage electricity sampling terminal seat, reference 157 part is magnetism backup sampling terminal seat.

In one embodiment, the circuit board assembly is located above the shell and is responsible for the transmission 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 archs, can realize fixing the screens of circuit board, adopts countersunk head screw to fix the top cap on the shell frame, can furthest's saving space for expand the inner chamber volume of shell frame, improve the detection precision of transformer.

The top of the shell frame is provided with a large empty slot, and the data wires of the three transformers pass through the empty slot to be welded on the first circuit board and are welded by adopting a patch. The bottom side of the N-phase part of the shell frame is provided with an extended long rectangular block 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 mutually spliced with a power supply side voltage electricity taking terminal, a load side voltage sampling terminal and a load side temperature sampling terminal. Three row seats are welded on the upper side, row pins are arranged on the row seats, and the other ends of the row pins are connected with the row seats welded on the first circuit board. The 64-bit European socket is welded on the upper side of the first circuit board and used as a data transmission interface with the secondary part, and all current, voltage, temperature and magnetic backup sampling information are converged. And three magnetic backup sampling terminal bases are welded in front of the first circuit board and are mutually spliced with the three magnetic backup protection devices.

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

The integrated sampling transformer is installed by putting the transformer into the primary base and then directly inserting the transformer from the tail end of the transformer through the copper bar, so that the space is saved, and the assembly efficiency is improved. And the encapsulation of the current transformers is realized, each current transformer is effectively protected, misoperation caused by disturbance of external factors is prevented, and the reliability of the transformers is effectively improved.

The integrated transformer is used, so that the voltage, current and temperature information of the circuit breaker can be obtained in real time, the comprehensive dynamic monitoring of the circuit breaker is realized, and the intellectualization of the product is improved. And magnetic backup protection information is integrated, and when the current transformer is saturated and invalid due to overlarge current, a brake separating signal can be transmitted, so that the reliability of the product is improved.

In addition, the second baffle is installed on the upper portion of the tail ends of the first copper bar and the second copper bar, and the outside foreign matters are prevented from entering the circuit breaker body through the clamping groove clamping position of the first base.

Further, as shown in fig. 28, fig. 28 is a schematic view of the first middle cover structure. In one embodiment, the first middle cover has ten through holes at each end, and is mounted on the first base by screws. The front end of the first middle cover is designed with a concave rectangular structure with two layers of ladder-shaped devices, six through holes are formed in the first ladder, four corners of the first middle cover are used for fixing the magnetic control driving mechanism on the pressing plate through screws, and the other two corners of the first middle cover are used for fixing the magnetic control driving mechanism on the first base through screws, so that the first middle cover is double-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 are used for avoiding interference between the magnetic control driving mechanism and the first middle cover, the large circular through hole is used for passing through the guide rod, a protruding rib structure is designed around the large circular through hole, and the structural strength of the position is improved. The rear end of the first middle cover is provided with a long rectangular through hole, and a 64-bit European socket in the integrated transformer is exposed from the through hole and connected with the secondary part.

As shown in fig. 29 and 30, fig. 29 is a schematic view of installation of the magnetic drive mechanism and leakage of the 64-bit euro socket, and fig. 30 is a schematic view of the magnetic drive mechanism. Wherein, reference numeral 158 part is the backup pad, reference numeral 159 part is the fifth guard shield, reference numeral 160 part is the roof, reference numeral 161 part is the third circuit board, reference numeral 162 part is 12P European style socket, reference numeral 163 part is the turning arm, reference numeral 164 part is the third round pin axle, reference numeral 165 part is the small support, reference numeral 166 part is the second micro-gap switch, reference numeral 167 part is the guide holder.

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

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

The backup pad is located magnetic control actuating mechanism's below, and the periphery is designed to have six round through-holes, can fix magnetic control actuating mechanism on a base unit through the screw. The hem sheet metal construction that backup pad one side was designed to turn up can pass through the screw fixation third circuit board, and the third circuit board is used for with magnetic control actuating mechanism's data transmission to secondary portion. And a 12P European type socket is welded on the third circuit board, so that the plug-in with the secondary part can be realized.

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

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

The lower side of the center part of the supporting plate is welded with a guide ring, and the guide ring can be clamped on the large round hole of the first middle cover to limit the position when the magnetic control driving mechanism is installed.

The last time through screw fixation in backup pad central part has quiet iron core. 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. The movable iron core and the static iron core are internally provided with pressure springs, 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 fixedly provided with a guide seat through a screw. The guide rod installed on the primary base mechanism extends out to sequentially pass through the support plate, the static iron core, the movable iron core, the transition plate and the guide seat. The positions with alternate diameters on the guide rod are clamped on the movable iron core, and nuts are sleeved on the small diameters of the guide rod to tightly fix the guide rod, the guide seat, the transition plate and the movable iron core.

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

The transition plate is fixedly provided with a first guide rod and a second guide rod through threaded connection. Corresponding guide holes are designed on the top plate, so that the first guide rod and the second guide rod can only vertically move. And then the magnetic control driving mechanism can not generate rotary motion and only can vertically move when being switched on and off.

The front end on the roof is fixed with two little supports through the screw, installs two second micro-gap switches through the screw on the little support, separates through hollow cylinder in the middle of two second micro-gap switches to prevent that the second micro-gap switch from taking place horizontal displacement, prevent micro-gap switch inefficacy. When the switch is in the switch-off state, the elastic piece of the second micro switch is pressed down by the guide seat, and when the switch-on state is in the switch-on state, the elastic piece of the second micro switch is in the release state. The data wires of the two micro switches sequentially pass through the top plate, the fifth protective cover and the supporting plate to the left lower side of the magnetic control driving mechanism, then pass through the supporting plate and are welded on the third circuit board, and related parts are all designed with through holes for penetrating through the wires.

The rear end of the top plate is welded with a first support, and the crank arm is connected with the first support through a third pin shaft. The front end of the crank arm is riveted with two extended pins which can be clamped in the sliding groove of the guide seat. The top is designed with a cylinder with a threaded hole, a cap can be installed, the top is also designed with two through holes, and the corresponding position of the cap is also designed with two through holes. After the handle is inserted into the cap, the handle can be further inserted onto the crank arm, so that acting force is shared for the cap, and deformation and damage of the cap are prevented when the handle is used for manual opening and closing.

The whole primary part is used as the body structure of the breaker to form an independent module, and the internal parts of the breaker are also designed into independent small modules, and the breaker comprises an arc extinguishing chamber device, a fixed contact device, a magnetic backup protection device, a rotating shaft combination body device, an integrated transformer, a magnetic control driving mechanism and the like which are all in modularized design. The modules are relatively independent and are slightly affected by the interference of other parts, so that the reliability of the product is improved, the modular assembly can be realized during the assembly, the modules are not affected by other parts during the assembly, the flexibility of the product is improved, the automatic assembly can be realized, the assembly efficiency is improved, and the production cost is reduced.

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

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

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

As shown in fig. 34 to 35, fig. 34 is a schematic view of secondary partial explosion, and fig. 35 is a schematic view of secondary partial structure. Wherein, the reference numeral 21 part is a secondary shell part, the reference numeral 22 part is a control board part, the reference numeral 201 part is a second base, the reference numeral 202 part is an upper cover, the reference numeral 203 part is a flip cover, and the reference numeral 204 part is a rubber plug.

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

The second base is positioned at the left lower side of the secondary part and can be tightly fixed with the upper cover through a screw. The second base can be clamped into the first middle cover. The second base is designed with a long groove structure around, and can be used for placing a sealing ring, so that the sealing performance of the inside of the secondary part is improved 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, so that a cover cap arranged on the magnetic control driving mechanism can extend out. The handle is conveniently inserted into the cap from the outside so as to control the manual opening and closing of the circuit breaker.

The right side of the rectangular hole groove of the upper cover is provided with a plurality of circular arc-shaped reinforcing ribs, so that the strength of the part can be improved. The upper cover is prevented from being broken due to the fact that the cover cap is contacted with the upper cover by inertial force in the opening and closing process. The left lower side of the upper cover is provided with hole sites capable of leaking out a plurality of keys, hole sites for poking Guan Kongwei and 2P external plugs and indicator light hole sites, so that operators can realize the operation control of the circuit breaker.

The pilot lamp hole site department of upper cover installs the leaded light post, transmits the light beam of pilot lamp on the control panel to upper cover department when guaranteeing electromagnetic compatibility. The right lower side of the upper cover is provided with a rectangular groove for placing the carrier module. The flip cover is arranged at the position of the upper cover storage carrier module and 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. The control boards of the control board part work cooperatively to control the operation of the circuit breaker.

The first control panel is installed through the screw connection in the lower extreme of second base, has 64 bit European style plug on the first control panel, can be opposite to the 64 bit European style socket of integral type mutual-inductor in the part of once, with the data transmission to the control panel that the mutual-inductor monitored in the part of once.

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

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

The third control panel is located the second control panel upside, installs on the second control panel through the screw connection, has a plurality of hollow cylinders between second control panel and the third control panel for support the third control panel. And man-machine interaction parts such as a toggle switch, a 2P external plug, a key, a liquid crystal panel, an indicator lamp and the like are welded on the third control panel. The surge switch can adjust the circuit breaker to two modes of operation, either "remote" or "on-site". The liquid crystal panel can display the running state of the circuit breaker in real time and record time. The on-site operation of the circuit breaker can be realized through the keys, the 2P external plug can realize the transmission of emergency energy between the circuit breaker and the outside, and the emergency power supply of the circuit breaker can be realized. The indicator light can provide the operating state of the circuit breaker in real time. The man-machine interaction parts of the third control panel 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, fixes on the second base through the screw, and the welding has 12P European style plug above, can realize inserting with 12P European style socket in the magnetic control drive module, with magnetic control drive mechanism's data transmission to the control panel.

The fifth control board is positioned on 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 opening and closing actions of the magnetic control driving module.

Each control board realizes data intercommunication through data lines, power strip and the like. Under different models, except that the fifth control panel for providing energy is different, other control panels are the same, and the universalization and modularization design of the control panels are realized. The cost can be effectively reduced, and the operation maintenance and the later iterative upgrade of the circuit breaker are also facilitated.

Four square protruding blocks are designed at two ends of the upper cover, and round through holes are designed in the protruding blocks, so that the second upper cover is fixedly arranged on the first middle cover through screw connection. The two ends of the upper cover are provided with the protruding handle structures, so that the secondary part has good stress points when the primary part is plugged and pulled out, and the use of workers is facilitated.

The whole secondary part is designed as an independent module, so that hot plug operation in the operation of the circuit breaker can be realized. The whole control part of the circuit breaker is divided into one part, and only one secondary part is needed to be replaced during maintenance and later-stage iteration upgrading, so that the replacement cost is reduced, and the service life of the whole circuit breaker is prolonged. And the two times are independent, so that the reliability of the circuit breaker is improved. The control board inside the whole secondary part is also designed into independent small modules, the small modules are mutually independent, if one control board is damaged, the replacement of the minimum cost can be realized, the small modules of the circuit breakers of different types can be universal, the cost of parts is reduced, the universality between products is improved, and the operation and the maintenance of all the circuit breakers are convenient.

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 secondary base structure, fig. 38 is a schematic view of the secondary part control board, and fig. 39 is a schematic view of the upper cover structure. Wherein, reference 205 part is the first control board, reference 206 part is the second control board, reference 207 part is the third control board, reference 208 part is the fourth control board, reference 209 part is the fifth control board, reference 210 part is the carrier module, reference 211 part is the 64-bit European plug, reference 212 part is the 10P external plug, reference 213 part is the 12P European plug, reference 214 part is the toggle switch, reference 215 part is the 2P external plug, reference 216 part is the button, reference 217 part is the liquid crystal panel, reference 218 part is the capacitor, reference 219 part is the indicator light, and reference 220 part is the light guide column.

The working method of the embodiment of the application specifically comprises the following steps:

when the switch needs to be electrically switched on, the magnetic control driving mechanism is in a split state at the moment, and the static iron core and the movable iron core need to be closed. The control panel in the circuit breaker sends the closing instruction, the electric capacity discharges, energy information transmission is to the 12P European style socket of magnetic control actuating mechanism, and then transmit to coil position, the coil obtains forward electricity, thereby make quiet iron core and movable iron core produce magnetic force, movable iron core moves down, drive transition board then, the guide holder, the guide arm moves down, and movable iron core downward compression pressure spring, when quiet iron core and movable iron core are closed, the pressure spring is in limit compression state, the guide arm motion drives pivot assembly device and takes place decurrent rotation, drive movable contact sword closing a floodgate, movable contact sword sticis on quiet contact device, the circuit breaker main circuit switch-on, the switch is in the closing state. The guide seat does not squeeze the elastic sheet of the second micro switch any more, the micro switch releases a closing signal, the signal is transmitted back to a control panel in the switch, and the switch acquires information of the closing state at the moment. At this time, even if the 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 a closing state.

Electric brake separating: when the switch needs to be electrically opened, the magnetic control driving mechanism is in a closing state, a control board in a separate breaker for realizing the static iron core and the movable iron core is required to send a closing instruction, the capacitor is discharged, energy information is transmitted to a 12P European type socket of the magnetic control driving mechanism and then transmitted to a coil part, and the coil is reversely electrified, so that an 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 compression spring in the limit compression state releases the constraint of the magnetic force of the iron core, the compression spring starts 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 compression spring is limited, the compression spring does not rebound upwards any more, the two iron cores of the magnetic control driving mechanism are in a split state, the guide rod moves to drive the rotating shaft assembly device to rotate upwards, the movable contact knife is driven to split, the movable contact knife leaves the static contact device and draws an arc, the arc is sucked into the arc extinguishing cover device, the main circuit of the circuit breaker is disconnected, and the switch is in a split state. The guide seat extrudes the elastic piece of the second micro switch to trigger the switching-off signal of the micro switch, the signal is transmitted back to the control board in the switch, and the switch acquires the information of the split state at the moment.

Manual brake separating: when the manual brake is opened, the magnetic control driving mechanism is in a closing state, and the direction of the cap points to one side close to the power supply side of the circuit breaker. When the handle is pulled by hand, and the pulling force overcomes the holding magnetic force of the two iron cores, the crank arms swing relative to the first support, so that the two pins on the crank arms swing towards the direction far away from the power supply side of the circuit breaker. Because the pin on the crank arm slides on the spout of guide holder to drive the guide holder and upwards move, drive the cab apron in proper order, move the iron core and upwards remove, and the compression spring removes the suppression of magnetic force, the pressure spring also kick-backs fast, and it keeps away from quiet iron core to accelerate to move the iron core, finally makes the cab apron touch the roof, and pivot assembly device also is kept away from quiet contact device fast by the guide arm drive, and the breaker main loop disconnection realizes quick manual brake separating.

And (3) manual closing: when the manual switch-on is performed, the magnetic control driving mechanism is in a split state, and the direction of the cap points to one side close to the load side of the circuit breaker. When the handle is pulled by hand and the pulling force 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 in the direction 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 and the static iron core are in contact with each other, and the spring is compressed to the limit position. The second micro switch sends out a closing position signal. After the circuit breaker receives the position signal information, the capacitor sends out an energy signal, and the energy signal is transmitted to the 12P European style end seat, and then is transmitted to the coil part, so that the two closed magnetic control iron cores are instantly magnetized, the two iron cores are kept to be closed, the movable contact knife of the rotating shaft assembly is tightly pressed on the static contact copper bar, and the main circuit of the circuit breaker is connected, so that manual closing is realized.

Secondary partial live replacement: after the circuit breaker normally operates for a certain period, the electronic hardware of the secondary part is aged and needs to be replaced, parts of the primary part can be normally used, screws connected with the secondary part at two ends of the upper cover are removed, the secondary part needing to be replaced is pulled out in a live mode, the 64-bit European plug and the socket and the 12P European plug and the socket are mutually separated, data transmission between the secondary part and the integrated transformer and the magnetic control driving mechanism is disconnected, then a new secondary part is replaced, and the data connection is realized by mutually inserting the 64-bit European socket and the 12P European plug and the socket, and the live replacement of the secondary part is completed by fixing the new secondary part and the old primary part through screws.

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

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

2. The multiple parts inside the primary part are in modularized design, the modules are relatively independent, the interference factor is small, the assembly is convenient, the automatic assembly can be realized, 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, improve the flexibility of product, make things convenient for the operation maintenance of product, reduce cost.

4. The integrated transformer integrated with multiple sensing functions is designed, so that voltage, temperature and current information of the circuit breaker can be obtained in real time, and comprehensive dynamic monitoring of products is realized. The straight copper bar can be adopted for installation, so that the assembly efficiency is improved, and meanwhile, the inner space of a product is saved.

5. The magnetic control driving mechanism is designed, so that the breaker can be driven to rapidly complete opening and closing operations, and the breaking performance of a product is improved. The manual opening and closing device is designed on the magnetic control driving mechanism, so that the manual opening and closing requirements 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-action type circuit breaker has fewer parts, more reasonable transmission modes of the parts and arrangement of the parts, and reduces the production cost of products while prolonging the service life.

While the preferred embodiments of the present application have been described in detail, the present application is not limited to the above embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit and scope of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.

Claims (10)

1. A two-shot split type magnetic control quick-action type circuit breaker, characterized by comprising:

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 fixed 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 third circuit board, a top plate, a plurality of guide posts, a fifth protecting cover, a static iron core, a coil, a movable iron core, a transition plate, a guide seat and a second micro switch, wherein the third circuit board is arranged on the supporting plate, the guide posts are arranged on the supporting plate and the top plate, the guide posts are wrapped by the fifth protecting cover, the static iron core is fixed on the supporting plate, the coil is arranged in the static iron core, a pressure spring is arranged between the movable iron core and the static iron core, the movable iron core is fixed on the transition plate, the upper part of the transition plate is limited by the top plate, the guide seat is fixed on the transition plate, the guide rod penetrates through the supporting plate, the static iron core, the movable iron core, the transition plate and the guide seat, and the elastic sheet of the second micro switch is pressed down by the guide seat when the circuit breaker is in a switching-off state; when the circuit breaker is in a closing state, the elastic piece of the second micro switch is in a releasing state;

The secondary part comprises a secondary shell part and a control board part, wherein the secondary shell part is movably arranged on the primary part, the control board part is arranged on the secondary shell part and is in communication connection with the third circuit board, the control board 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 blade of the rotating shaft assembly device to contact with the static contact device or separate from the static contact device.

2. The two-stage split type magnetic control quick-action type 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 installed on the first base, the first bottom plate is arranged on the bottom side of the first base, the inner part of the first base is 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.

3. The two-stage split type magnetic control quick action type circuit breaker according to claim 2, wherein the static contact device is installed at the power supply side of the first base, the static contact device comprises 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 arranged on the static contact copper bar, the static contact is used for contacting or separating with the movable contact knife during opening and closing actions, the arc striking copper bar is used for guiding an electric arc into an arc extinguishing cover during opening and closing actions, the static contact copper bar is bent, and the first protection cover is installed on the static contact copper bar.

4. The two-stage split type magnetic control quick-action type circuit breaker according to claim 3, further comprising an arc-extinguishing cover device, wherein the arc-extinguishing cover device is installed on the upper side of the fixed contact device, the arc-extinguishing cover device comprises an arc-extinguishing cover, a second protection cover, a third baffle plate and a fourth baffle plate, the arc-extinguishing cover is in a grid-plate type structure, and the second protection cover shields the arc-extinguishing cover, the third baffle plate and the fourth baffle plate; the arc generated during the opening operation is attracted into the grid plate of the arc extinguishing cover by the arc striking copper bar of the static contact device, the arc also passes through the grid plate of the arc extinguishing cover to reach the third baffle plate, and is blown out of the hole in the third baffle plate and towards the fourth baffle plate, and the fourth baffle plate is bent in response to generate a gap so as to enable the arc to leave the circuit breaker.

5. The two-time split type magnetic control quick-action type circuit breaker according to claim 2, wherein the rotating shaft assembly device is positioned at the rear side of the fixed contact device, the rotating shaft assembly device comprises three movable contact blades, three first torsion springs and a rotating shaft cutter sleeve, a plurality of cylinders are arranged at the middle part and two side parts of the rotating shaft cutter sleeve in a total mode, the cylinders are in clamping arrangement with semicircular grooves of the first base, and the rotating shaft cutter sleeve can rotate relative to the first base; the rotary shaft cutter sleeve is internally provided with three chambers, the three chambers are an A-phase chamber, a B-phase chamber and a C-phase chamber respectively, each chamber is provided with a movable contact cutter and a first torsion spring, the movable contact cutter is fixed in the rotary shaft cutter sleeve through the first torsion spring, the front end of the chamber is provided with a hole site for penetrating through a first pin shaft, the hole sites of the A-phase chamber and the C-phase chamber are through holes, the first pin shaft reaches the B-phase chamber through the A-phase chamber or the C-phase chamber, the hole site of the B-phase chamber is a blind hole, and the first pin shaft is fixed on the B-phase chamber.

6. The two-stage split type magnetic control quick action type circuit breaker according to claim 5, wherein the primary base mechanism further comprises a pressing plate which is fixed on the first base and is 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 are used for limiting the cylinder; the pressing plate is provided with a through hole, and the through hole is used for penetrating the guide rod and enabling the guide rod to move in a direct motion mode along the direction perpendicular to the pressing plate; the pressing plate is also provided with a plurality of rib structures for reinforcing the structural strength.

7. The two-time split type magnetic control quick-action type 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 provided with 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 positioned on the rectangular hole site of the arched sheet metal part.

8. The two-time split type magnetic control quick-action type 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 blades is three, a annealed copper wire is welded at the tail of the movable contact blades, a small copper bar is welded at the tail of the annealed copper wire, a through hole is formed in the small copper bar, a third copper bar is installed at the load side of the N-phase channel, a second protection cover, a third baffle and a fourth baffle are installed at the upper portion of the third copper bar, a first baffle is installed at the rear side of the second protection cover, the first baffle is clamped on the first base, three small copper bars are respectively connected with the first copper bars, the third copper bars are connected with the second copper bars, the first copper bars of A phase, B phase and C phase respectively penetrate through the magnetic backup protection device and the integrated transformer and then are fixed on the first base, and the third copper bar of N phase is fixed on the first transformer after penetrating through the integrated transformer.

9. The two-time split type magnetic control quick-action type circuit breaker according to claim 8, wherein the magnetic backup protection device comprises a third protection cover, a fourth protection cover, a movable iron sheet, a second pin shaft, a frame, 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 the first base, the third protection cover and the fourth protection cover are connected in a buckling manner, a first clamping groove for fixing the static iron sheet is formed in the bottoms of the third protection cover and the fourth protection cover, the static iron sheet is fixed on the first base, the frame is fixed on the static iron sheet, the frame is connected with the movable iron sheet through the second pin shaft, a crank arm structure is arranged on the movable iron sheet, a second torsion spring is arranged on the second pin shaft, the movable iron sheet and the frame are respectively clamped, so that the movable iron sheet is in a state of not touching the first protection cover, the movable iron sheet is connected with the first micro switch through the second torsion spring, the first torsion spring is provided with the first micro switch, the first micro switch is connected with the first plug 2P terminal plug and the first micro switch, and the first micro switch are provided with the real-time plug and the first micro switch 2.

10. The two-stage split type magnetic control quick-action type circuit breaker according to claim 8, wherein a power supply side voltage electricity taking terminal is installed at one side of the bottom surface of the first base, the power supply side voltage electricity taking terminal is respectively communicated with the static contact copper bars of the phase a, the phase B and the phase C and the third copper bar of the phase N of the other side of the first base, a load side voltage sampling terminal and a load side temperature sampling terminal are installed at 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 phase a, the phase B and the phase C of the other side of the first base, the load side temperature sampling terminal is respectively communicated with the first copper bars of the phase a, the phase B and the phase C and the second copper bars of the phase N, and the power supply side voltage electricity taking terminal, the load side voltage sampling terminal and the load side temperature sampling terminal are electrically connected with the integrated transformer.

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