CN217158086U - Modularized circuit breaker operating mechanism - Google Patents

Abstract

The utility model relates to a modularization circuit breaker operating device, including moving iron core, quiet iron core, excitation coil and operating rod, move iron core and quiet iron core and all overlap in the outside of operating rod, with the cooperation of axial motion of axle center with the operating rod, move the iron core and be located the top of quiet iron core, the relative setting of the stem of the two still includes the permanent magnet, the permanent magnet is cyclic annularly, and fixed cover is established on the stem of quiet iron core, and the top of moving the iron core is equipped with the spring holder, the spring holder is equipped with the vertical operating rod hole that can supply the operating rod to pass, and the operating rod upwards passes the operating rod hole, and its top has connect stop nut soon. The permanent magnet of the utility model can increase the reliability of the attraction between the movable iron core and the static iron core, so that the operating mechanism can be suitable for harsh environments with vibration under the operating conditions of ships, mines and the like; the arrangement of the spring seat is convenient for being connected with a synchronizing device matched with the operating mechanism, so that the positioning and guiding effects can be achieved, and the limit nut can be limited in stroke.

Description

Modularized circuit breaker operating mechanism

Technical Field

The utility model relates to a modularization circuit breaker operating device belongs to electrical switch technical field.

Background

In the prior art, after the movable iron core and the static iron core of the circuit breaker operating mechanism are attracted, the attraction state is kept by means of remanence, the vibration resistance is weak, when the circuit breaker operating mechanism is applied in a vibration environment, the condition that the movable iron core and the static iron core are accidentally separated easily occurs, and the working reliability is poor. In addition, the traditional circuit breaker operating mechanism has more mechanical parts and more movable parts, so that the structure is complex, the installation and the maintenance are not easy, and mechanical faults are easy to occur. Each part is scattered after the operating mechanism is detached, so the disassembly, the assembly and the maintenance are inconvenient, and particularly when the circuit breaker operating mechanism breaks down, the circuit breaker operating mechanism is difficult to quickly overhaul and maintain, so that the normal work and operation of the circuit breaker and an electrical system where the circuit breaker is located are influenced.

SUMMERY OF THE UTILITY MODEL

For overcoming the above defect of prior art, the utility model provides a modularization circuit breaker operating device can increase the actuation reliability between the dynamic and static iron core, reduces combined floodgate peak current.

The utility model discloses realize above-mentioned purpose's technical scheme is: the utility model provides a modularization circuit breaker operating device, is including moving iron core, quiet iron core, excitation coil and operating connecting rod, move the iron core with quiet iron core all overlaps the outside of operating connecting rod, with the cooperation of axial motion of operating connecting rod with the axle center, it is located to move the iron core the top of quiet iron core, the stem of the two sets up relatively, move the iron core with leave the interval between the quiet iron core, still include the permanent magnet, the permanent magnet is cyclic annular, and fixed cover is established on the stem of quiet iron core, it is equipped with the spring holder to move the top of iron core, the spring holder is equipped with and supplies the vertical operating connecting rod hole that the operating connecting rod passed, the operating connecting rod upwards passes the operating connecting rod hole, the top of operating connecting rod has had stop nut soon.

Preferably, the permanent magnet is an alnico permanent magnet or a ndfeb permanent magnet.

Preferably, the permanent magnet is sleeved at the bottom of the core column of the static iron core.

Preferably, the excitation coil surrounds the core column of the stationary core and extends upwards out of the stationary core to the outside of the corresponding core column of the movable core, and the excitation coil is located above the permanent magnet.

Preferably, the excitation coil is provided with a coil framework, the coil framework is annular, a radial inward-concave annular groove is formed in the radial outer wall of the coil framework, the excitation coil is wound in the annular groove, and the coil framework is sleeved on the outer sides of the core column of the static iron core and the corresponding core column of the movable iron core.

Preferably, the spring seat is made of plastic, glass fiber plastic or nylon, or the spring seat is made of elastic material.

Preferably, a tooth groove part matched with the shaft tooth of the circuit breaker synchronizing shaft is arranged on the side surface of the spring seat.

Preferably, the tooth groove part is formed by regularly arranging a plurality of tooth grooves at equal intervals along the side surface of the spring seat where the tooth grooves are located, and the tooth grooves are matched with shaft teeth of a synchronous shaft of the circuit breaker.

Preferably, the spring holder is cuboid or square, and the number of tooth slot parts is two, and the symmetry is located on two relative sides of spring holder.

Preferably, reinforcing ribs are symmetrically arranged on the other two opposite side surfaces of the spring seat.

Preferably, the top of the operating link hole is a counter bore, and the limit nut is located in the counter bore.

Preferably, modular circuit breaker operating device still includes the protective sheath, moves iron core limiting plate and bottom plate, the protective sheath is the open tube-shape in upper and lower both ends, move the iron core with quiet iron core is equal coaxial to be located in the protective sheath, the vertical setting of operating link, the bottom plate supports the bottom of protective sheath, move the iron core limiting plate and support the top of protective sheath, the protective sheath move the iron core limiting plate with fixed connection can be dismantled to the bottom plate, it can supply to move to be equipped with on the iron core limiting plate the through-hole that the spring holder passed, operating link stretches out downwards the bottom plate.

Preferably, modular circuit breaker operating device still includes an upper fixed plate, an upper fixed plate is fixed to be located the spring holder with move between the iron core, an upper fixed plate with move the through-hole sliding fit on the iron core limiting plate, be equipped with the vertical guide post that upwards stretches out on an upper fixed plate's the top surface, move fixedly connected with guide post support on the iron core limiting plate, be equipped with on the guide post support with guide post matched with guiding hole, the guide post inserts in the guiding hole and with guide hole sliding fit, an upper fixed plate's center is equipped with and supplies the centre bore that runs through from top to bottom that the operating connecting rod passed.

Preferably, an annular step surface which is narrow at the top and wide at the bottom is arranged on the radial outer wall of the operating connecting rod, the annular step surface is located in the static iron core, a contact pressure spring and a separating brake spring which are located between the movable iron core and the static iron core are sleeved on the operating connecting rod, the separating brake spring is sleeved outside the contact pressure spring, a space is reserved between the contact pressure spring and the separating brake spring, the bottom end of the contact pressure spring is abutted to or fixedly connected to the annular step surface, the top end of the contact pressure spring is abutted to or fixedly connected to an iron yoke of the movable iron core, and two ends of the separating brake spring are respectively abutted to or fixedly connected to the static iron core and the iron yoke of the movable iron core.

The utility model has the advantages that:

1. the utility model discloses a setting of permanent magnet move the iron core with quiet iron core actuation back, utilize the magnetism of permanent magnet can increase the actuation reliability between the movable, quiet iron core, make operating device can be applicable to running conditions such as naval vessel or mine have the harsh environment of vibrations, can also reduce the requirement to closing brake operation power, reduce combined floodgate peak current, reduce the parameter requirement to control system components and parts, in addition, because the existence of permanent magnet, can not require movable, quiet iron core to possess the magnetic characteristic or can reduce the requirement to the coercive force and other remanence characteristic index of movable, quiet iron core, thereby reduce the requirement to the material of movable, quiet iron core and actuation face machining precision, reduction in production cost;

2. the utility model has the advantages of few mechanical parts, simple structure, high reliability, low failure rate and easy installation and maintenance, the spring seat, the contact pressure spring, the opening spring, the operating connecting rod and the arc extinguish chamber contact jointly form an elastic buffer system, which can effectively ensure that the circuit breaker is closed without bouncing and reduce the rebound of opening;

3. the arrangement of the tooth socket part of the spring seat is convenient for being connected with a synchronizing device (usually a circuit breaker synchronizing shaft) matched with the operating mechanism, so that the positioning and guiding effects can be achieved, the number of connecting parts of the device can be effectively reduced, and the limit nut can be subjected to stroke limit;

4. when the operating mechanism executes the opening operation (when the movable iron core and the static iron core are separated), the spring seat can play a flexible buffering role between the movable iron core and the limiting nut, so that the movable iron core is prevented from frequently and directly pushing the limiting nut to cause equipment damage or failure;

5. the arrangement of the spring seat can support flexible adjustment of the over-stroke of the operating mechanism by utilizing the elastic characteristic of the spring seat, is convenient for the over-stroke adjustment of the operating mechanism in the production and working processes, is favorable for improving the working performance of the operating mechanism, ensures that a breaker switch (a movable contact and a fixed contact) are well contacted, is also favorable for improving the adaptability of the breaker switch, and is suitable for application under different requirements on the over-stroke of the operating mechanism under different working conditions;

6. the utility model discloses an each spare part assembles the integrated modular structure who forms the standard back, makes things convenient for dismouting, transportation, debugging, inspection, test and modularization streamlined production.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a perspective view of the spring seat of the present invention;

fig. 4 is a top view of the present invention;

fig. 5 is a bottom view of the present invention;

fig. 6 is a perspective view of the present invention;

fig. 7 is a perspective exploded view of the present invention.

Detailed Description

All the directional indicators (e.g., upper, lower, top, bottom, etc.) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. under a certain specific posture (as shown in the drawings), and do not constitute the limitation of the actual using direction, and if the specific posture is changed, the directional indicator is changed accordingly.

Referring to fig. 1-7, the utility model discloses a modularization circuit breaker operating device, including moving iron core 1, quiet iron core 2, excitation coil 3 and operating link 4, the vertical setting of operating link, move the iron core with quiet iron core all overlaps the outside of operating link, with the cooperation of coaxial axle axial motion of operating link, it is located to move the iron core the top of quiet iron core, the relative setting of the stem of the two, move the iron core with keep a determining deviation (leave the opening distance) under the circuit breaker separating brake state between the quiet iron core. The circuit breaker operating mechanism further comprises a permanent magnet 5, wherein the permanent magnet is annular and fixedly sleeved on the core column of the static iron core. The permanent magnet is arranged, after the movable iron core and the static iron core are attracted (after the switch is switched on), the attraction reliability between the movable iron core and the static iron core can be increased by utilizing the magnetism of the permanent magnet, when the breaker is subjected to the switch-off operation, only a small switch-off pulse current opposite to the switch-on current needs to be introduced into the excitation coil, so that the demagnetization of the movable iron core and the static iron core and the combined effect of the reset mechanism (usually a switch-off spring) of the movable iron core on the acting force of the movable iron core are just counteracted, the excitation action of the permanent magnet on the movable iron core and the static iron core can separate the movable iron core and the static iron core, and the switch-off operation of the breaker is further completed, compared with the traditional permanent magnet breaker operating mechanism, the utility model can be suitable for the severe environment with vibration under the running conditions of ships, mines and the like, can also reduce the requirement on the switch-off operation and reduce the switch-on peak current, and the parameter requirements on the components of the control system are reduced. In addition, because of the arrangement of the permanent magnet, the movable iron core and the static iron core can not be required to have residual magnetism or the requirements on the coercive force and other residual magnetism indexes of the movable iron core and the static iron core can be reduced, thereby reducing the requirements on the material of the movable iron core and the static iron core and the processing precision of the attraction surface and reducing the production cost.

The top of moving the iron core is equipped with spring holder 6, the spring holder is equipped with the vertical operating link hole that can supply the operating link passes, the operating link upwards passes operating link hole, the top of operating link has connect stop nut 7 soon, stop nut is located the top of spring holder.

The permanent magnet is preferably an alnico permanent magnet, has good magnetic property and low temperature coefficient, and can also be a permanent magnet made of other materials, such as an ndfeb permanent magnet and the like. In practical application, the magnetism of the permanent magnet can be adjusted by selecting permanent magnets of different materials, selecting permanent magnets of different brands (or called labels) and/or adjusting the height (or called thickness) of the permanent magnet, so that the attraction force after the movable iron core and the static iron core are attracted can be adjusted, and different application design requirements can be met. The permanent magnets can also be prepared into one or more specifications of thin sheets, and the total height of the permanent magnets can be adjusted by adopting different numbers of permanent magnet(s), so that the total magnetic force of the permanent magnets can be adjusted.

In practical application, move the iron core with the structure of quiet iron core is the same usually, all includes indisputable yoke and stem, move the iron core with the indisputable yoke of quiet iron core is preferred all to be the annular, is equipped with and supplies the shaft hole that the operating connecting rod passed, move the iron core with the stem of quiet iron core is preferred all to be the tube-shape (be columniform tube-shape usually), outwards stretches out from the coaxial perpendicular of the internal surface of respective indisputable yoke, and the internal diameter of the stem of tube-shape is greater than the aperture in the shaft hole of respective indisputable yoke, the stem of quiet iron core is from the upper surface of quiet iron core upwards stretches out, the stem of moving the iron core is from the lower surface of the indisputable yoke of moving the iron core downwards stretches out. Correspondingly, the permanent magnet is the ring form, its internal diameter with the stem external diameter of quiet iron core cooperatees, the preferred cover of permanent magnet is established the stem bottom of quiet iron core, with the yoke of iron of quiet iron core fixed connection, for example through bolt or screw connection.

The excitation coil is preferably wound around a core column of the static core and extends upwards out of the static core and extends to the outer side of a corresponding core column of the movable core, and the excitation coil is located above the permanent magnet.

The movable iron core and the iron yoke of the static iron core can also be in a cylindrical shape with one open side (preferably, the cylindrical shape is formed, the top end of the iron yoke of the static iron core is open, the bottom end of the iron yoke of the movable iron core is open), the inner diameter of the cylinder wall is larger than the outer diameter of each core column, the movable iron core and the core columns of the static iron core are respectively and coaxially located inside each iron yoke, the permanent magnet is arranged at the bottom of an annular cavity formed between the core columns of the static iron core and the side wall of the iron yoke, and the excitation coil is wound in the annular cavity formed between the core columns of the static iron core and the side wall of the iron yoke and upwards extends out of the annular cavity. In practical application, the current can be changed by adjusting the number of the surrounding turns of the exciting coil and/or selecting the exciting coils with different diameters, so that the attraction speed of the movable iron core and the static iron core can be adjusted to meet different application design requirements.

The movable iron core and the static iron core can adopt mirror symmetry same or similar structures, the sizes of all parts in the axial direction can be the same or different according to actual needs, the movable iron core comprises an inner cylinder body, an outer cylinder body and end plates, the inner cylinder body and the outer cylinder body are coaxially arranged, the end plates are integrally connected with the inner cylinder body and the outer cylinder body, the end plates of the static iron core are positioned at the bottom to form a bottom iron yoke of the static iron core, the end plates of the movable iron core are positioned at the top to form a top iron yoke of the movable iron core, the inner cylinder bodies of the two iron cores (the static iron core and the movable iron core) and the inner end surfaces of the outer cylinder bodies (the upper end of the static iron core and the lower end of the movable iron core) are opposite up and down, the lower part and the upper part of the excitation coil are respectively positioned between the inner cylinder body and the outer cylinder body of the static iron core and the movable iron core, the inner cylinder body of each iron core can be regarded as an iron core column (core column), when the excitation coil is electrified, and exciting the static iron core and the movable iron core to form magnetic force which is mutually attracted, and the movable iron core moves downwards to drive the operation connecting rod to move downwards through the synergistic action of components such as a spring and the like.

The inner diameter of the inner cylinder of each iron core is larger than the outer diameter of the operating link positioned in the inner cylinder, and an annular gap which can be used for arranging linkage parts (such as a contact pressure spring and a brake separating spring) is formed between the inner cylinder and the operating link.

The height (vertical size) that excitation coil upwards stretched out quiet iron core is not more than move the height of the stem of iron core, so that excitation coil does not influence move the iron core with quiet iron core's actuation.

The movable iron core and the static iron core adopt the same coil (excitation coil) to realize the opening and closing operation of the operating mechanism, when in closing, positive closing pulse current is introduced into the excitation coil, the movable iron core and the static iron core are excited, the movable iron core moves downwards until the movable iron core and the static iron core are attracted, and after the excitation current disappears, the movable iron core and the static iron core are kept at the opening and closing position by virtue of remanence; during switching-off, switch-off pulse current opposite to switching-on current is introduced into the magnet exciting coil, the movable iron core and the static iron core are demagnetized, and the movable iron core moves upwards until the switch-off position (for example, under the thrust action of a switch-off spring).

The excitation coil can be provided with a coil framework 8 which is annular, the radial outer wall of the coil framework is provided with an annular groove which is radially inwards sunken, the excitation coil is wound in the annular groove, the coil framework is sleeved on the outer sides of the core column of the static iron core and the corresponding core column of the movable iron core (in an annular cavity between the core column of the static iron core and the side wall of the iron yoke), the bottom end of the coil framework can be fixedly connected with the permanent magnet, the iron yoke of the static iron core and the lower fixed plate are uniformly distributed with a plurality of through holes which penetrate up and down along the same circumference, the permanent magnet, the static iron core and the through holes on the lower fixed plate have the same number and the upper and lower positions are in one-to-one correspondence, the bottom end of the coil framework is provided with a plurality of bolt sleeves which extend downwards, and the outer diameter of the bolt sleeves is matched with the aperture of the through holes, the coil framework is provided with a plurality of through holes, the number of the through holes is the same, the upper position and the lower position of the through holes are in one-to-one correspondence, the bolt sleeves on the coil framework are sequentially inserted into the corresponding through holes on the permanent magnet and the iron yoke of the static iron core from top to bottom during assembly, and then the through holes on the lower fixing plate are upwards screwed into the bolt sleeves to be fixedly connected with the bolts.

Correspondingly, the distance between the top surface of the coil framework and the side wall of the static iron core or the top surface of the core column is not larger than the height of the core column of the movable iron core.

The material of spring holder can be plastics, add glass fiber plastics or nylon etc. easily processing, and is with low costs, the spring holder also can adopt to have elastic material to make.

The side surface of the spring seat is preferably provided with a tooth socket part 61 matched with the shaft tooth of the synchronizing shaft of the circuit breaker, so that the synchronizing shaft matched with the operating mechanism can be conveniently connected, the positioning and guiding effects can be achieved, and the number of connecting parts of the device can be effectively reduced. The tooth groove part can be formed by regularly arranging a plurality of tooth sockets at equal intervals along the side surface of the spring seat, the tooth sockets are matched with shaft teeth of the synchronous shaft of the circuit breaker, and the tooth groove part is connected with the synchronous shaft by meshing with the shaft teeth on the corresponding synchronous shaft of the circuit breaker.

The spring seat is generally rectangular or square, and the number of the tooth groove parts is preferably two, and the tooth groove parts are symmetrically arranged on two opposite side surfaces of the spring seat. The other two opposite sides of the spring seat are preferably symmetrically provided with reinforcing ribs 62 to improve structural strength.

The top of the operating connecting rod hole is preferably a counter bore 63, the limiting nut is located in the counter bore, the outer diameter of the limiting nut is larger than the inner diameter of the operating connecting rod hole below the limiting nut, and the limiting nut is normally abutted against a step surface formed by the counter bore and the operating connecting rod hole below the counter bore under the action of a corresponding spring. The counter bore can be a square hole or a round hole.

The modularized circuit breaker operating mechanism preferably further comprises a protective sleeve 9, a movable iron core limiting plate 10 and a lower fixed plate 11, the protective sleeve is in a cylindrical shape with two open ends at the upper end and the lower end, the movable iron core and the static iron core are coaxially located in the protective sleeve, the lower fixed plate is horizontally arranged and is abutted against the bottom end of the protective sleeve from bottom to top or abutted against the bottom end of the protective sleeve from the lower part of the protective sleeve, the movable iron core limiting plate is horizontally arranged and is abutted against the top end of the protective sleeve from top to bottom or abutted against the top end of the protective sleeve from the upper part of the protective sleeve, the movable iron core limiting plate and the lower fixed plate are detachably and fixedly connected, the disassembly and assembly are convenient, a through hole for the spring seat to pass is formed in the center of the movable iron core limiting plate, a through hole for the operating connecting rod to pass is formed in the center of the lower fixed plate, and the operating connecting rod extends out of the lower fixed plate, the operating connecting rod penetrates through the through hole in the lower fixing plate and is in sliding fit with the through hole.

The lower fixing plate is preferably made of a non-magnetic conductive material, such as an aluminum plate or a stainless steel material.

In practical application, the cross section of the main body part of the protective sleeve is preferably circular, the cross section of the lower fixing plate is preferably square (or the main body is square, the middle parts of four sides of the square bulge outwards to form a certain radian so as to be matched with the annular bottom edge of the protective sleeve), the side length of the square is preferably smaller than the outer diameter of the protective sleeve, the length of the diagonal line of the square is larger than the outer diameter of the protective sleeve or a protruding structure capable of abutting against the bottom end of the protective sleeve is arranged at four corners of the square, and the lower fixing plate abuts against the bottom end of the protective sleeve through four corners of the lower fixing plate. The cross section of the movable iron core limiting plate is preferably square, the side length of the square is preferably smaller than the outer diameter of the protective sleeve, the length of a diagonal line of the square is larger than the outer diameter of the protective sleeve or a protruding structure capable of abutting against the bottom end of the protective sleeve is arranged at four corners of the protective sleeve, and the movable iron core limiting plate abuts against the top end of the protective sleeve through four corners of the movable iron core limiting plate. The middle parts of the four side edges of the movable iron core limiting plate can be vertically bent upwards, four vertical positioning plates extending upwards are uniformly distributed at the top end of the protective sleeve along the circumference, and during assembly, the four bending parts on the movable iron core limiting plate respectively support the inner sides of the four positioning plates at the top end of the protective sleeve, so that assembly and positioning are facilitated.

The protective sheath move the iron core limiting plate with can be for the fixed connection structure dismantled between the bottom plate: move the through-hole that the four corners of iron core limiting plate was equipped with about running through respectively perhaps the four corners of moving the iron core limiting plate is equipped with respectively along the outside protrusion structure of diagonal, the through-hole that runs through about being equipped with on the protrusion structure, the four corners of bottom plate is equipped with respectively about the through-hole that runs through perhaps the four corners of bottom plate is equipped with respectively along the outside protrusion structure of diagonal, the through-hole that runs through about being equipped with on the protrusion structure, move the through-hole on the iron core limiting plate with the upper and lower position one-to-one of through-hole on the bottom plate constitutes four group's connecting holes of group, realize through the stay bolt 12 that passes four group's connecting holes respectively and with stay bolt matched with nut the protective sheath move the iron core limiting plate with can dismantle fixed connection between the bottom plate.

Further, can dismantle fixed connection structure still includes four pipy long bolt covers 13, the length of long bolt cover with the height of protective sheath is the same, overlaps in the outside of long bolt (the internal diameter of long bolt cover usually with the internal diameter of long bolt cooperatees), and its top is supported on the bottom surface of movable iron core limiting plate, and the bottom is supported on the top surface of bottom plate, plays the supporting role.

Furthermore, be equipped with four radial inward arc recesses on the outer wall of protective sheath, four the recess is followed the circumference evenly distributed of protective sheath, the height of recess with the height of protective sheath is the same (promptly the top of recess with the top surface of protective sheath is in the coplanar, the bottom of recess with the bottom surface of protective sheath is in the coplanar), the radian of recess with the outer fringe radian of long screw rod cover cooperatees, during the assembly, four long screw rod cover is blocked respectively correspondingly in the recess, so sets up, is convenient for long screw rod cover during the assembly for the axial and the radial positioning of protective sheath.

The modularized circuit breaker operating mechanism preferably further comprises an upper fixing plate 14, the upper fixing plate is horizontally and fixedly positioned between the spring seat and the movable iron core, the spring seat, the upper fixing plate and the movable iron core can be fixedly connected through bolts and nuts matched with the bolts (at this time, screw holes matched with the bolts are formed in the top ends of the upper fixing plate and the movable iron core, as shown in fig. 7), the upper fixing plate is in sliding fit with through holes in a movable iron core limiting plate (generally, the cross section of the upper fixing plate is circular and is corresponding, the through holes in the movable iron core limiting plate are round holes), guide posts 15 vertically extending upwards are arranged on the top surface of the upper fixing plate, guide post supports 16 are fixedly connected on the movable iron core limiting plate, and guide holes or guide sleeves matched with the guide posts are arranged on the guide post supports, the guide post is inserted into the guide hole and is in sliding fit with the guide hole, so that the guide effect is achieved on the up-and-down movement of the movable iron core (the operation action of the operating mechanism on the opening and closing of the circuit breaker), and the situation that the control precision of the operating mechanism is influenced or the operating mechanism breaks down due to the fact that the movable iron core is deflected circumferentially or radially accidentally in the up-and-down movement process (when the operating mechanism controls the opening and closing of the circuit breaker) can be effectively avoided. And a central hole which can be penetrated by the operating connecting rod is formed in the center of the upper fixing plate.

The guide posts are typically located at the edge (off-center) of the upper mounting plate to avoid interference with the position of the spring seat. The guide post support is preferably in a long strip plate shape, the middle part of the guide post support is upwards bulged to form a step, the contour shape of the upwards bulged step is matched with the contour shape of the through hole in the movable iron core limiting plate at the mounting position of the upwards bulged step, and therefore the mounting space and the moving space moving upwards are reserved for the upper fixing plate.

The annular step surface (the outer diameter of the operating connecting rod above the annular step surface is smaller than the outer diameter of the operating connecting rod below the annular step surface), the annular step surface is positioned in the static iron core, the operating connecting rod is sleeved with a contact pressure spring 17 and a separating spring 18, the separating spring is sleeved outside the contact pressure spring, a space is reserved between the contact pressure spring and the static iron core, the bottom end of the contact pressure spring is supported or fixedly connected on the annular step surface, the top end of the contact pressure spring is supported or fixedly connected on an iron yoke of the movable iron core, and the two ends of the separating spring are respectively supported or fixedly connected on a bottom iron yoke of the static iron core and a top iron yoke of the movable iron core.

The operation connecting rod can adopt an integrated structure (manufactured by integral molding) or a combined structure formed by coaxially and fixedly connecting a plurality of sections, so that the processing, the manufacturing and the assembly of related parts are convenient. Each part of the operating mechanism can be used for the operation connecting rod to pass through the hole (through hole, central hole or shaft hole, etc.) to match with the outer diameter of the corresponding part of the operation connecting rod (sliding fit).

The utility model discloses divide-shut brake theory of operation and process when being applied to the circuit breaker do:

when the closing operation is executed, the positive closing pulse current is introduced into the magnet exciting coil, the movable iron core is excited to move downwards (the upper fixed plate and the spring seat are driven to move downwards simultaneously), the contact pressure spring and the opening spring are compressed at the same time, the operating connecting rod moves downwards under the thrust action of the contact pressure spring to drive the movable conductive column connected with the operating connecting rod and the movable contact of the vacuum arc-extinguishing chamber to move downwards until the movable contact and the fixed contact of the vacuum arc-extinguishing chamber are closed, and when the movable iron core and the fixed iron core are attracted, the closing action is completed, meanwhile, the compression of the opening spring and the contact pressure spring is completed, energy storage is well done for opening, at the moment, the current is stopped to be led into the magnet exciting coil, the movable iron core and the static iron core are kept in an attraction state by virtue of remanence and excitation of the permanent magnet to the movable iron core and the static iron core.

When the switching-off operation is executed, switching-off pulse current opposite to the switching-on current is introduced into the excitation coil, so that the combined effect of demagnetization of a moving iron core and a static iron core and the thrust of a switching-off spring (or the contact pressure spring and the switching-off spring) on the moving iron core counteracts the excitation effect of a permanent magnet on the moving iron core and the static iron core, the moving iron core moves upwards (drives the upper fixing plate and the spring seat to move upwards simultaneously) to be separated from the static iron core by means of the thrust effect of the switching-off spring or the thrust effects of the contact pressure spring and the switching-off spring, meanwhile, a counter bore of the spring seat and a step surface formed by an operating connecting rod hole below the counter bore push the limiting nut upwards, so that the operating connecting rod moves upwards to drive a moving conductive column connected with the operating connecting rod and a moving contact of the vacuum arc extinguish chamber to move upwards, and the moving contact of the vacuum arc extinguish chamber is separated from the static contact, and completing the opening action until the movable iron core moves to the opening position.

The contact pressure spring with the separating brake spring can adopt conventional design, the separating brake spring is used for realizing the separating brake operation, the contact pressure spring is used for compressing tightly the contact and guarantees that the circuit breaker explosion chamber reliably contacts, satisfies the electric arc and opens and cut off the requirement.

The preferred and optional technical means disclosed in the present invention can be combined arbitrarily to form a plurality of different technical solutions, except for the specific description and the further limitation that one preferred or optional technical means is another technical means.

Claims (10)

1. The utility model provides a modularization circuit breaker operating device, is including moving iron core, quiet iron core, excitation coil and operating link, move the iron core with quiet iron core all overlaps the outside of operating link, with the cooperation of axial motion of the same axle center of operating link, it is located to move the iron core the top of quiet iron core, the stem of the two sets up relatively, move the iron core with leave the interval between the quiet iron core, its characterized in that still includes the permanent magnet, the permanent magnet is cyclic annular, and fixed cover is established on the stem of quiet iron core, the top of moving the iron core is equipped with the spring holder, the spring holder is equipped with and supplies the vertical operating link hole that the operating link passed, the operating link upwards passes operating link hole, the top of operating link has connect stop nut soon.

2. The modular circuit breaker operating mechanism of claim 1 wherein the permanent magnet is an alnico permanent magnet or a ndfeb permanent magnet.

3. The modular circuit breaker operating mechanism of claim 1 wherein the permanent magnet is sleeved on the bottom of the core column of the stationary core.

4. The modular circuit breaker operating mechanism of claim 3 wherein the field coil surrounds the leg of the stationary core and extends upwardly beyond the stationary core to the outside of the corresponding leg of the moving core, the field coil being positioned above the permanent magnet.

5. The modular circuit breaker operating mechanism of claim 1, wherein the spring seat is provided at a side thereof with a spline portion engaged with a shaft tooth of the breaker synchronizing shaft.

6. The operating mechanism of modular circuit breaker as claimed in claim 5, wherein said tooth slot portion is formed by a plurality of tooth slots regularly arranged at equal intervals along the side surface of said spring seat on which said tooth slots are formed, said tooth slots being engaged with shaft teeth of a synchronizing shaft of the circuit breaker.

7. The modular circuit breaker operating mechanism of claim 6 wherein the spring seat is rectangular or square in shape and the number of tooth slots is two and symmetrically disposed on opposite sides of the spring seat.

8. The modular circuit breaker operating mechanism of claim 1 wherein the top of the operating link bore is a counterbore and the retainer nut is positioned in the counterbore.

9. The operating mechanism of modular circuit breaker according to claim 1, 2, 3, 4, 5, 6, 7 or 8, further comprising a protecting jacket, a movable iron core limiting plate and a bottom fixing plate, wherein the protecting jacket is in a cylindrical shape with two open ends, the movable iron core and the stationary iron core are coaxially located in the protecting jacket, the operating link is vertically arranged, the bottom fixing plate abuts against the bottom end of the protecting jacket, the movable iron core limiting plate abuts against the top end of the protecting jacket, the movable iron core limiting plate and the bottom fixing plate are detachably and fixedly connected, a through hole for the spring seat to pass through is formed in the movable iron core limiting plate, and the operating link extends downwards to the bottom fixing plate.

10. The operating mechanism of modular circuit breaker according to claim 9, further comprising an upper fixing plate, wherein the upper fixing plate is fixedly disposed between the spring seat and the movable iron core, the upper fixing plate is slidably engaged with the through hole of the movable iron core limiting plate, a guide post extending vertically upward is disposed on a top surface of the upper fixing plate, a guide post bracket is fixedly connected to the movable iron core limiting plate, a guide hole is disposed on the guide post bracket, the guide post is engaged with the guide post, the guide post is inserted into the guide hole and slidably engaged with the guide hole, and a central hole is disposed at a center of the upper fixing plate, through which the operating link passes.

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