CN217182122U - 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, the vertical setting of operating rod, move the iron core with quiet iron core all overlaps in the outside of operating rod, with the coaxial axial motion cooperation of operating rod, it is located to move the iron core the top of quiet iron core leaves the interval between the two, still includes the protective sheath, moves iron core limiting plate and bottom plate, the open tube-shape in both ends about the protective sheath is, move the iron core with quiet iron core is equal coaxial to be located in the protective sheath, the bottom plate supports the bottom of protective sheath, and with fixed connection can be dismantled to quiet iron core, move the iron core limiting plate and support the top of protective sheath to through matched with joint structure with the protective sheath joint. The utility model discloses a protective sheath with move the mode that adopts the joint between the iron core limiting plate and connect, be favorable to circuit breaker operating device's fast assembly, and easy dismounting.

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

Through bolt fixed connection between each part of traditional permanent magnetism direct action formula operating device and circuit breaker utmost point post and the protective sheath, each part is scattered state after operating device pulls down, therefore the dismouting is maintained very inconveniently, especially when circuit breaker operating device breaks down, is difficult to carry out the overhaul fast to it and maintains to influence the normal work and the operation of circuit breaker and the electric system that is located.

SUMMERY OF THE UTILITY MODEL

For overcoming the above defect of prior art, the utility model provides a modularization circuit breaker operating device, the equipment and dismantle convenient, easy access and maintenance and modularization streamlined production.

The utility model discloses realize above-mentioned purpose's technical scheme is: an operating mechanism of a modular circuit breaker comprises a movable iron core, a static iron core, an excitation coil and an operating connecting rod, the operating connecting rod is vertically arranged, the movable iron core and the static iron core are both sleeved on the outer side of the operating connecting rod, the movable iron core is coaxially and axially movably matched with the operating connecting rod, the movable iron core is positioned above the static iron core, a space is reserved between the movable iron core and the static iron core, the movable iron core further comprises a protective sleeve, a movable iron core limiting plate and a lower fixing plate, the protective sleeve is in a cylindrical shape with openings at the upper end and the lower end, the movable iron core and the static iron core are coaxially positioned in the protective sleeve, the lower fixed plate is abutted against the bottom end of the protective sleeve, and is detachably and fixedly connected with the static iron core, the movable iron core limiting plate is abutted against the top end of the protective sleeve, and the two ends of the operating connecting rod respectively extend out of the corresponding movable iron core limiting plate and the lower fixing plate.

Preferably, the clamping structure includes elastic buckle and setting element, elastic buckle locates the top of protective sheath and vertical upwards stretching out, elastic buckle's card tooth orientation the axis direction of protective sheath, the setting element is for locating the vertical riser that upwards stretches out on the movable iron core limiting plate, the riser with elastic buckle's position is corresponding, the top surface of riser constitutes elastic buckle's joint face.

Preferably, the joint structure is equipped with the anticreep device, the anticreep device is the arc bent plate, the both ends of arc bent plate are equipped with the otic placode of outside stretching out, the arc bent plate spiral-lock is in the outside of elasticity buckle, through both ends the otic placode with fixed connection can be dismantled to the riser.

Preferably, the quantity of joint structure is two sets of, two sets of joint structure symmetry sets up, perhaps the quantity of joint structure is multiunit, multiunit the joint structure is along same circumference evenly distributed.

Preferably, modular circuit breaker operating device still includes an upper fixed plate, move the center of iron core limiting plate be equipped with run through from top to bottom and with the shape matched with mounting hole of the outer fringe profile of an upper fixed plate, an upper fixed plate arranges in the mounting hole and with the pore wall sliding fit of mounting hole, an upper fixed plate with move the iron core and can dismantle fixed connection, 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 guide hole and with guiding hole sliding fit, an upper fixed plate's center is equipped with and supplies the through-hole that runs through from top to bottom that the operating connecting rod passed.

Preferably, the modular circuit breaker operating mechanism further comprises an emergency opening interface, the emergency opening interface comprises a connecting plate and an interface bent plate arranged on the top surface of the connecting plate, and the connecting plate is coaxially and fixedly connected to the top surface of the upper fixing plate.

Preferably, the interface bent plate is a vertical plate fixedly connected to the top surface of the connecting plate, and the top end of the vertical plate is provided with an outward bend.

Preferably, a center hole which penetrates through the center of the connecting plate vertically is formed in the center of the connecting plate, a tubular operating connecting rod sleeve which extends upwards is coaxially arranged on the top surface of the connecting plate, a shaft hole of the operating connecting rod sleeve is coaxially communicated with the center hole, the operating connecting rod is inserted into and extends out of the operating connecting rod sleeve, a limiting nut is screwed on the top of the operating connecting rod, and the limiting nut abuts against the top end of the operating connecting rod sleeve.

Preferably, the movable iron core and the core column of the static iron core are arranged oppositely, and the exciting coil surrounds the core column of the static iron core and extends upwards out of the static iron core and extends to the outer side of the corresponding core column of the movable iron core.

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, be equipped with narrow annular step face wide down on the radial outer wall of operating link, annular step face is located in the quiet iron core, the cover is equipped with on the operating link and is located move the iron core with contact pressure spring and separating brake spring between the quiet iron core, the separating brake spring housing is in outside the contact pressure spring, leave the interval between the two, contact pressure spring's bottom is supported or fixed connection is in on the annular step face, the top is supported or fixed connection is in move on the yoke of iron core, separating brake spring's both ends support respectively or fixed connection move on the iron core with move on the yoke of iron core.

The utility model has the advantages that:

1. the protective sleeve and the movable iron core limiting plate are connected in a clamping manner, so that the disassembly and the assembly are convenient, the quick assembly and disassembly of the circuit breaker operating mechanism are facilitated, and the overhaul and the maintenance are convenient;

2. the anti-falling device of the utility model can limit the elastic buckle from the outside of the elastic buckle based on the positioning piece, and prevent the elastic buckle from being accidentally separated from the positioning piece due to vibration or shaking and other reasons in the working or transportation process of the circuit breaker operating mechanism;

3. the utility model discloses a guide post and the guide post support that cooperate play the guide effect to the up-and-down motion of moving the iron core (operating mechanism to the operation action of circuit breaker divide-shut brake), can effectively avoid moving the iron core in the in-process that reciprocates (operating mechanism drives the divide-shut brake of circuit breaker) unexpected circumference deflection or radial offset that takes place, influence operating mechanism's control accuracy or make operating mechanism break down;

4. the emergency opening interface of the utility model can rapidly realize the opening operation of the breaker through the emergency opening interface when the operating mechanism has faults (for example, the movable iron core and the static iron core can not be separated) or the emergency situation (the normal speed of the operating mechanism for controlling the opening of the breaker is difficult to meet the rapid opening requirement of the site) occurs, thereby meeting the rapid opening requirement of the site;

5. 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 top view of the present invention;

fig. 3 is a bottom view of the present invention;

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

FIG. 5 is a cross-sectional view A-A of FIG. 1;

fig. 6 is a schematic exploded perspective 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. 1-6, 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 coaxial cover is in the outside of operating link, with the cooperation of operating link with the coaxial axle axial motion of operating link, it is located to move the iron core the top of quiet iron core, keeps a determining deviation (leaves the opening distance) between the two under the circuit breaker separating brake state. The circuit breaker operating mechanism further comprises a protective sleeve 5, a movable iron core limiting plate 6 and a lower fixing plate 7, the protective sleeve is in a cylindrical shape with openings at the upper end and the lower end, the movable iron core and the static iron core are coaxially positioned in the protective sleeve, the outer wall of the movable iron core is in sliding fit with the inner wall of the protective sleeve, the operating connecting rod is superposed with the axis of the protective sleeve, the lower fixing plate is horizontally arranged, abuts against the bottom end of the protective sleeve from bottom to top or abuts against the bottom end of the protective sleeve from the lower part of the protective sleeve, and is detachably and fixedly connected with the static iron core (for example, connected with the bottom end of the static iron core through bolts or screws, the number of the bolts or screws is preferably multiple, and the bolts or screws are uniformly distributed along the same circumference so as to improve the effect and the stability of the fixed connection, and the bolts or screws are screwed so that the lower fixing plate can be tightly pressed against the bottom end of the protective sleeve, the bottom plate with other suitable connection modes of dismantling that can also adopt prior art down between the quiet iron core connect), move iron core limiting plate level setting, from the top down support the top of protective sheath, perhaps support from the top of protective sheath and lean on the top of protective sheath to through between the two matched with joint structure with the protective sheath joint to realize easy dismounting's purpose, the joint structure restriction moves iron core limiting plate rebound, to moving the iron core limiting plate and exert the effort that pushes down (including direct decurrent effort and the effort that has downward weight), will move the iron core limiting plate with the top of protective sheath together and press from both sides tightly and fix. Move the iron core limiting plate with the central authorities of bottom plate all are equipped with the axial through-hole that allows the operating link to pass, upwards stretch out on the top of operating link move the iron core limiting plate, the bottom of operating link stretches out downwards the bottom plate for the end is connected with moving of the vacuum interrupter of circuit breaker, the center of bottom plate is equipped with the through-hole that runs through from top to bottom, the operating link passes through-hole on the bottom plate and sliding fit with it.

The preferred elastic buckle 8 and the setting element 9 of including of joint structure, elastic buckle locates the top of protective sheath and vertical upwards stretch out, include vertical elastic plate and be located the card tooth on the top of elastic plate, the bottom of elastic plate with move the top fixed connection or the integrated into one piece of iron core limiting plate, card tooth orientation the axis direction of protective sheath, the setting element is for locating move the vertical riser that upwards stretches out on the iron core limiting plate, the riser with elastic buckle's position is corresponding, the top surface of riser constitutes the joint face of elastic buckle, card tooth joint is in on the top surface of riser.

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, 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 the four corners of the lower fixing plate. The cross section of moving the iron core limiting plate preferably is the square, and the length of side of square is preferred to be less than the external diameter of protective sheath, and the length of the diagonal of square is greater than the external diameter of protective sheath or be equipped with the bulge structure that can support and lean on the protective sheath bottom in four angle departments, move the iron core limiting plate and support through its four corners the top of protective sheath, the middle part of four sides of moving the iron core limiting plate can be vertical upwards bent, constitutes the riser (promptly the setting element).

The outer wall of the protective sleeve can be provided with four radial outward bulges which are uniformly distributed along the circumference of the protective sleeve, the heights of the bulges are the same as the height of the protective sleeve, the top surface of the bulges and the top surface of the protective sleeve are positioned in the same plane, the bottom end of the protective sleeve is not provided with an extending section (totally four extending sections) downwards, the heights of the extending sections are the same as the height of the lower fixed plate, the bottoms of the four extending sections are respectively provided with flanges which are radially inward and matched with the corresponding side edges of the lower fixed plate, the heights of the flanges are the same as the height of the lower fixed plate and are used for positioning the lower fixed plate and limiting the static iron core, when the lower fixed plate is assembled with the protective sleeve, the lower fixed plate is embedded into a groove surrounded by the four sections of flanges from bottom to top, the four corners of the lower fixing plate are respectively abutted against the bottom ends of the four bulges, so that the bottom surface of the lower fixing plate and the bottom surface of the protective sleeve are in the same plane, the cross section of the outer edge of each bulge is arc-shaped, the bulges are provided with vertical through holes, the four corners of the lower fixing plate are respectively provided with through holes which penetrate through from top to bottom, or the four corners of the lower fixing plate are respectively provided with a bulge structure which extends outwards along a diagonal line, the bulge structures are provided with through holes which penetrate through from top to bottom, the four through holes on the lower fixing plate and the four vertical through holes on the protective sleeve (on the four bulges) are in one-to-one correspondence and are coaxially communicated, the four corners of the movable iron core limiting plate are respectively provided with through holes which penetrate through from top to bottom or the four corners of the movable iron core limiting plate are respectively provided with bulge structures which extend outwards along the diagonal line, and the bulge structures are provided with through holes which penetrate through from top to bottom, the four through holes in the movable iron core limiting plate are in one-to-one correspondence with and coaxially communicated with four vertical through holes in the protective sleeve (on the four protrusions), and the aperture of the through hole in the lower fixing plate and the aperture of the through hole in the movable iron core limiting plate are generally the same as the aperture of the through holes, so that the fixation of the circuit breaker operating mechanism on a rack or a foundation of an installation site is facilitated on one hand, and the fixation mode can be that four screws are adopted to respectively penetrate through the four coaxially communicated through holes in the movable iron core limiting plate, the through holes in the protective sleeve and the through holes in the lower fixing plate and then are screwed and fixed with the circuit breaker or a frame structure through nuts matched with each other; on the other hand can the joint structure break down unable realization the protective sheath with move when the joint between the iron core limiting plate is fixed or in order to further improve the reliability, adopt four screw rods to pass four coaxial intercommunications of group respectively move the through-hole on the iron core limiting plate, perforation on the protective sheath with behind the through-hole on the bottom plate, connect the realization with matched with nut soon the protective sheath with move the fixed connection between the iron core limiting plate.

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

The joint structure is preferred to be equipped with anti-disengaging device, anti-disengaging device's main part is arc bent plate 10, and its both ends are equipped with the otic placode that outwards stretches out, the radian of the main part of arc bent plate is preferred to be suitable for to follow the outside spiral-lock of elasticity buckle (usually indicate the elastic plate) is in on the elasticity buckle and make its both ends the otic placode supports the setting element (indicate) is last, the arc bent plate spiral-lock is in the outside of elasticity buckle, through both ends the otic placode with fixed connection can be dismantled to the riser, can dismantle fixed connection mode can be for through bolt or screwed connection. The setting of anticreep device can be based on the setting element is followed the outside of elasticity buckle is right the elasticity buckle carries on spacingly, prevents that circuit breaker operating device from making because reasons such as vibration or rocking in work or transportation elasticity buckle with the setting element is unexpected to throw off.

The quantity of joint structure can be two sets of, two sets of joint structure symmetry sets up, the quantity of joint structure also can be the multiunit, the multiunit the joint structure is along same circumference evenly distributed, thereby improves the protective sheath with the steadiness that moves the iron core and connect.

The modular circuit breaker operating device preferably still includes an upper fixed plate 11, move the center of iron core limiting plate be equipped with run through from top to bottom and with the shape matched with mounting hole of the outer fringe profile of upper fixed plate, the cross section of upper fixed plate is preferably circular, corresponding, the mounting hole is the round hole, the upper fixed plate level is arranged in the mounting hole and with the pore wall sliding fit of mounting hole, the upper fixed plate with move the iron core and can dismantle fixed connection, can dismantle the fixed connection mode and can be for through bolt or screwed connection. The preferred guide post 12 that upwards stretches out that is equipped with vertically on the top surface of an upper fixed plate, move fixedly connected with guide post support 13 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 guiding hole sliding fit, thereby it is right move up and down (operating device to the operating action of circuit breaker divide-shut brake) of iron core and play the guide effect, can effectively avoid move the iron core and in the in-process that reciprocates (operating device when controlling the divide-shut brake of circuit breaker) unexpected circumference deflection or radial offset that takes place, influence operating device's control accuracy or make operating device break down. And a through hole which can be penetrated by the operating connecting rod is formed in the center of the upper fixing plate.

The guide post is typically located off-center on the upper mounting plate to avoid interference with an operating link passing through the upper mounting plate. 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, and the contour shape of the upwards bulged step is matched with the contour shape of the mounting hole in the mounting part of the upwards bulged step, so that a mounting space and an upwards moving movement space are reserved for the upper fixing plate.

The modular circuit breaker operating mechanism preferably further comprises an emergency opening interface 14, which comprises a connecting plate 15 and an interface bent plate 16 arranged on the top surface of the connecting plate, wherein the connecting plate is horizontally and coaxially fixedly connected (for example, welded or connected by bolts/screws) on the top surface of the upper fixing plate. The emergency opening interface is arranged, so that the opening operation of the circuit breaker can be quickly realized through the emergency opening interface when the operating mechanism breaks down (for example, the movable iron core and the static iron core cannot be separated) or in emergency (the normal speed of the operating mechanism for controlling the opening of the circuit breaker cannot meet the quick opening requirement of the site), and the quick opening requirement of the site is met.

Further, the interface bent plate is fixed connection and is in vertical board on the top surface of connecting plate, the top of vertical board is equipped with bending towards the outside, bend and be connected with the urgent separating brake structure cooperation of circuit breaker, during urgent separating brake, can drive through the urgent separating brake structure of handle control on the cubical switchboard panel of circuit breaker urgent separating brake interface rapid upward movement, thereby drive the quick upward movement of movable iron core realizes quick separating brake.

The center of the connecting plate is provided with a central hole which penetrates through the connecting plate up and down and is used for the operating connecting rod to penetrate through, the top surface of the connecting plate is coaxially provided with a tubular operating connecting rod sleeve 17 which extends out upwards, a shaft hole of the operating connecting rod sleeve is coaxially communicated with the central hole, the diameter of the shaft hole is the same, the operating connecting rod is inserted into the central hole and the operating connecting rod sleeve from bottom to top and extends out of the operating connecting rod sleeve upwards, the top of the operating connecting rod is screwed with a limiting nut 18, the limiting nut is positioned above the operating connecting rod sleeve, the outer diameter of the limiting nut is larger than the inner diameter of the operating connecting rod sleeve, and the limiting nut is abutted against the top end of the operating connecting rod sleeve under the action of a corresponding spring in a normal state. The operating connecting rod sleeve is mainly arranged to be matched with the limiting nut to perform a relative limiting effect on an assembly formed by the operating connecting rod, the movable iron core, the upper fixed plate and the emergency opening interface when the breaker is opened and closed, so that the stroke of the operating connecting rod moving up and down is controlled.

Move the iron core with the structure of quiet iron core is preferred the same, all includes yoke and stem, move the iron core with the yoke of quiet iron core is preferred all to be the annular, is equipped with and supplies the shaft hole that the operating link passed, move the iron core with the stem of quiet iron core is preferred all to be the tube-shape (be the columniform tube-shape usually), outwards stretches out from the coaxial perpendicular of the internal surface of respective yoke, and the internal diameter of the stem of tube-shape is greater than the aperture in the shaft hole of respective yoke. Move the iron core with the stem of quiet iron core sets up relatively, promptly the stem of quiet iron core certainly the upper surface of quiet iron core upwards stretches out, the stem of moving the iron core is automatic the lower surface of the yoke of moving the iron core stretches out downwards, exciting coil encircles and upwards stretches out on the stem of quiet iron core extends to the outside of the corresponding stem of moving the iron core. The movable iron core and the iron yoke of the static iron core can also be in a cylindrical shape with one side open (preferably, the cylindrical shape is adopted, 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 core columns of the movable iron core and the static iron core are respectively and coaxially located inside each iron yoke, and the exciting coil surrounds an annular cavity formed between the core column 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).

Excitation coil can be equipped with coil skeleton 19, coil skeleton is the annular, is equipped with radial inside sunken annular groove on its radial outer wall, the coil of exciting is around establishing in the annular groove, the coil skeleton suit is in the stem of quiet iron core with move the outside of the corresponding stem of iron core (annular intracavity between the stem of quiet iron core and the yoke lateral wall), its bottom can with the bottom yoke fixed connection of quiet iron core, it is corresponding, coil skeleton's top surface with interval between the lateral wall of quiet iron core or the stem top surface is not more than move the height of the stem of iron core.

The radial outer wall of the operating connecting rod is preferably provided with an annular step surface with a narrow top and a wide bottom (the outer diameter of the operating connecting rod above the annular step surface is smaller than that of the operating connecting rod below the annular step surface), the annular step surface is usually positioned in a core column of the static iron core, a contact pressure spring (or called contact pressure spring) 20 and a brake separating spring (or called brake separating spring) 21 which are positioned between the movable iron core and the static iron core are sleeved on the operating connecting rod, the inner diameter of the opening spring is larger than the outer diameter of the contact pressure spring, the opening spring is sleeved outside the contact pressure spring, a space is reserved between the opening spring and the contact pressure spring, the bottom end of the contact pressure spring is propped against or fixedly connected to the annular step surface, the top end of the contact pressure spring is propped against or fixedly connected to the top iron yoke of the movable iron core, and two ends of the opening spring are respectively abutted against or fixedly connected to the bottom iron yoke of the static iron core and the 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, a forward closing pulse current is introduced into the excitation coil, the movable iron core is excited to start moving downwards (driving the upper fixed plate and the emergency opening interface to move downwards simultaneously), the contact pressure spring and the opening spring are compressed at the same time, the operation connecting rod moves downwards under the thrust action of the contact pressure spring to drive the movable conductive column connected with the operation 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, after the movable iron core and the fixed iron core are attracted, the closing action is completed, the movable iron core and the fixed iron core keep the attraction state of the excitation coil by virtue of the closing current continuously introduced into the excitation coil, or the attraction state is kept by virtue of the residual magnetism (no external power supply is required to continuously introduce current into the excitation coil for maintaining), at the moment, materials with proper remanence can be selected to prepare the movable iron core and the static iron core, and the specific coercive force or other remanence characteristic indexes can be obtained through theoretical calculation and/or experiments according to actual design.

When the switching-off operation is executed, switching-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, the movable iron core moves upwards (drives the upper fixed plate and the emergency switching-off interface to move upwards simultaneously) under the tension action of the switching-off spring or the thrust action of the contact pressure spring and the switching-off spring to be separated from the static iron core, meanwhile, the top end of the operating connecting rod sleeve upwards pushes the limit nut, so that the operating connecting rod moves upwards to drive the movable contact of the movable conductive column and the vacuum arc extinguish chamber connected with the operating connecting rod to move upwards, and the movable contact and the static contact of the vacuum arc extinguish chamber are separated until the movable iron core moves to the switching-off position, and the switching-off action is completed. When operating device breaks down (for example move, the unable separation of quiet iron core) or emergency (operating device control circuit breaker normal speed of separating brake is difficult to satisfy on-the-spot quick separating brake requirement), can drive through the urgent separating brake structure of handle control on the cubical switchboard panel of circuit breaker urgent separating brake interface rapid upward movement drives simultaneously the upper fixed plate move the iron core with the operation connecting rod upward movement realizes the separating brake operation of circuit breaker fast, satisfies on-the-spot quick separating brake requirement.

The contact pressure spring and the opening spring can adopt conventional design, the opening spring is used for realizing opening operation, and the contact pressure spring is used for pressing the contact to ensure reliable contact of the arc extinguish chamber of the circuit breaker, so that the requirement of electric arc breaking is met.

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. An operating mechanism of a modular circuit breaker comprises a movable iron core, a static iron core, an excitation coil and an operating connecting rod, the operating connecting rod is vertically arranged, the movable iron core and the static iron core are both sleeved on the outer side of the operating connecting rod, is coaxially and axially movably matched with the operating connecting rod, the movable iron core is positioned above the static iron core, a space is reserved between the movable iron core and the static iron core, it is characterized by also comprising a protective sleeve, a movable iron core limiting plate and a lower fixing plate, wherein the protective sleeve is in a cylindrical shape with openings at the upper end and the lower end, the movable iron core and the static iron core are coaxially positioned in the protective sleeve, the lower fixed plate is abutted against the bottom end of the protective sleeve, and is detachably and fixedly connected with the static iron core, the movable iron core limiting plate is abutted against the top end of the protective sleeve, and the two ends of the operating connecting rod respectively extend out of the corresponding movable iron core limiting plate and the lower fixing plate.

2. The operating mechanism of modular circuit breaker according to claim 1, wherein the locking structure comprises an elastic buckle and a positioning element, the elastic buckle is disposed on the top end of the protective sheath and vertically extends upward, the locking teeth of the elastic buckle face the axial direction of the protective sheath, the positioning element is a vertical plate disposed on the movable iron core limiting plate and vertically extends upward, the vertical plate corresponds to the elastic buckle, and the top surface of the vertical plate forms the locking surface of the elastic buckle.

3. The operating mechanism of modular circuit breaker as claimed in claim 2, wherein the locking structure is provided with an anti-releasing device, the anti-releasing device is an arc-shaped bent plate, two ends of the arc-shaped bent plate are provided with lugs extending outwards, the arc-shaped bent plate is buckled on the outer side of the elastic buckle, and the lugs at two ends are detachably and fixedly connected with the vertical plate.

4. The modular circuit breaker operating mechanism of claim 3, wherein the number of the snap structures is two, two sets of the snap structures are symmetrically arranged, or the number of the snap structures is multiple sets, and the multiple sets of the snap structures are evenly distributed along the same circumference.

5. The operating mechanism of modular circuit breaker according to claim 1, 2, 3 or 4, further comprising an upper fixing plate, wherein the center of the movable iron core limiting plate is provided with a mounting hole which penetrates through the center of the movable iron core limiting plate and matches with the outer edge profile of the upper fixing plate in shape, the upper fixing plate is disposed in the mounting hole and matches with the hole wall of the mounting hole in a sliding manner, the upper fixing plate is connected with the movable iron core in a detachable manner, a guide post which extends vertically upwards is disposed on the top surface of the upper fixing plate, a guide post support is fixedly connected to the movable iron core limiting plate, a guide hole which matches with the guide post is disposed on the guide post support, the guide post is inserted into the guide hole and matches with the guide hole in a sliding manner, and a through hole which allows the operating link to penetrate through is disposed at the center of the upper fixing plate.

6. The modular circuit breaker operating mechanism of claim 5, further comprising an emergency opening interface, the emergency opening interface comprising a connecting plate and an interface bent plate disposed on a top surface of the connecting plate, the connecting plate being coaxially and fixedly connected to a top surface of the upper fixing plate.

7. The operating mechanism of modular circuit breaker as recited in claim 6, wherein the interface bending plate is a vertical plate fixedly connected to the top surface of the connecting plate, and the top end of the vertical plate is provided with an outward bend.

8. The operating mechanism of modular circuit breaker as claimed in claim 7, wherein the connecting plate has a central hole passing through it, and a tubular operating link bushing extending upward is coaxially disposed on the top surface of the connecting plate, the shaft hole of the operating link bushing is coaxially connected to the central hole, the operating link is inserted into and extends out of the operating link bushing, and a stop nut is screwed on the top of the operating link and abuts against the top end of the operating link bushing.

9. The modular circuit breaker operating mechanism of claim 8 wherein the movable core is disposed opposite the stationary core leg, and the field coil surrounds the stationary core leg and extends upwardly beyond the stationary core leg to an outer side of the movable core leg.

10. The operating mechanism of a modular circuit breaker according to claim 9, wherein an annular step surface with a narrow top and a wide bottom is disposed on a radial outer wall of the operating link, the annular step surface is located in the stationary iron core, a contact pressure spring and a separating spring which are located between the movable iron core and the stationary iron core are sleeved on the operating link, the separating spring is sleeved outside the contact pressure spring, a space is left between the contact pressure spring and the stationary iron core, a bottom end of the contact pressure spring abuts against or is fixedly connected to the annular step surface, a top end of the contact pressure spring abuts against or is fixedly connected to an iron yoke of the movable iron core, and two ends of the separating spring respectively abut against or are fixedly connected to the stationary iron core and the iron yoke of the movable iron core.

Images