CN214043524U - Permanent magnet vacuum circuit breaker - Google Patents

Abstract

The utility model discloses a permanent magnetism vacuum circuit breaker, including the unit of opening a way and being used for installing the supporting device of the unit of opening a way, the unit of opening a way includes permanent magnetism mechanism, insulating part, coupling assembling, contact pressure spring, conducting strip, vacuum interrupter, switch static contact and contemporary subassembly, and permanent magnetism mechanism is including moving the core iron pull rod and to moving the shield that the core iron pull rod protected, and coupling assembling includes the head rod, moves core iron pull rod and head rod and is equipped with respectively and mills flat structure, the utility model discloses a permanent magnetism vacuum circuit breaker adopts direct drive design, has reduced a lot of transmission links, reduces the energy consumption, and transmission efficiency is guaranteed to the at utmost, the utility model discloses a permanent magnetism vacuum circuit breaker is whole miniaturized design, can improve the reliability of the circuit of breaking of aerifing the cabinet to and obtain faster the time of breaking a way.

Description

Permanent magnet vacuum circuit breaker

Technical Field

The utility model belongs to high-voltage electrical equipment field relates to a permanent magnetism vacuum circuit breaker.

Background

The existing circuit breaker adopts a spring operating mechanism, and the switching-on and switching-off of the spring operating mechanism in work are mainly realized by stretching and storing energy through a spring. During the work of the circuit breaker, the spring is in a load state for a long time, and the spring stiffness can be in an attenuation state after the spring is used for a long time, so that the output of the closing and opening of the circuit breaker can be influenced, and the discreteness of parameters of the closing time, the opening time, the closing speed, the opening speed, closing bounce, opening bounce and the like of the circuit breaker is too large or the circuit breaker cannot be met due to failure.

In addition, the breaker connects the moving contact and the fixed contact through the moving shaft to perform switching-on and switching-off actions, so that the efficiency of the movement transmission of the moving shaft plays an important role in the working performance of the breaker, the existing movement transmission of the moving shaft has many links, low transmission efficiency and complex and huge overall structure, is suitable for medium and large-sized inflatable cabinets, cannot adapt to the development trend of miniaturization of the inflatable cabinets, and the device effectively solves the problem.

Disclosure of Invention

The utility model discloses an overcome prior art not enough, provide a permanent magnetism vacuum circuit breaker.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a permanent magnet vacuum circuit breaker, characterized in that: including the unit of opening a circuit and being used for installing the supporting device who opens a circuit the unit, the unit of opening a circuit includes permanent magnetic mechanism, insulating part, coupling assembling, contact pressure spring, conducting strip, vacuum interrupter, switch static contact and contemporary subassembly, and permanent magnetic mechanism includes moving the core iron pull rod and to moving the shield that the core iron pull rod protected, and coupling assembling includes the head rod, moves core iron pull rod and head rod and is equipped with respectively and mills flat structure.

Further, the method comprises the following steps of; the supporting device comprises a switch front plate, a fixed support, a mechanism fixing plate for supporting a permanent magnet mechanism, a support and a lower support for supporting the vacuum arc extinguish chamber, the fixed support is provided with two groups and is symmetrically arranged, the switch front plate is arranged between the two groups of fixed supports, the mechanism fixing plate 14 comprises a horizontal supporting surface for supporting and a vertical mounting surface for fixing, a group of mechanism fixing plates, the lower support, the support and a conducting plate are matched and connected with a group of circuit breaking units, one-phase permanent magnet mechanism is fixed on the group of mechanism fixing plates, the mechanism fixing plate and the lower support are fixedly connected between the fixed supports, the mechanism fixing plate, the conducting plate, the support and the lower support are sequentially distributed and arranged from top to bottom along a straight line.

Further, the method comprises the following steps of; the permanent magnet mechanism further comprises an outer yoke, an inner yoke, a separating brake spring, a magnetic block, a lower magnetic yoke, an upper magnetic yoke and a coil, wherein a wire outlet hole is formed in the side face of the outer yoke, a moving core pull rod sequentially penetrates through the lower magnetic yoke, the inner yoke, the coil and the upper magnetic yoke, an outer convex protrusion is fixedly arranged on the outer surface of the moving core pull rod, an inner concave side groove is formed in the corresponding position of a penetrating channel of the moving core pull rod, the lower end face of the protrusion abuts against the lower end face of the side groove, the separating brake spring is sleeved on the outer surface of the moving core pull rod, the separating brake spring abuts between the upper magnetic yoke and the moving core pull rod, the magnetic block is made of a magnetic material, and the lower magnetic yoke and the upper magnetic yoke are fixedly arranged at two ends of the outer yoke respectively.

Further, the method comprises the following steps of; the shield includes the apron, the mounting hole that the annular distributes has set firmly on the apron, set firmly the shield through the mounting hole and be connected with lower yoke, the apron sets firmly the branch chamber that central chamber and circumference distribute with the side that lower yoke is relative, divide the chamber and be provided with first air channel with the intercommunication between central chamber, divide the chamber to be provided with the second air channel with the exterior space intercommunication, the central chamber, first air channel, divide chamber and second air channel to constitute the circulation of gas passageway, exchange the inside and outside gas in cavity through the circulation of gas passageway, the surface of shield 200 has set firmly a plurality of wales.

Further, the method comprises the following steps of; the insulating part is made by insulating material, the both ends of insulating part set up respectively to go up the screw hole and screw hole down, it is connected with moving the core iron pull rod to go up the screw hole, screw hole and coupling assembling are connected down, coupling assembling includes coaxial coupling's head rod and second connecting rod, the head rod includes the threaded rod, connecting rod main part and ring block, the connecting rod main part is provided with mills flat structure, the second connecting rod is moved the end by the connecting rod, the connecting rod supports the end, spacing end of connecting rod and connecting rod stiff end constitute, be provided with the spring pad between second connecting rod and conducting strip, the contact pressure spring cover is established at the second connecting rod surface, the upper end of contact pressure spring offsets with the ring block, the lower tip and the spring pad of contact pressure spring offset.

Further, the method comprises the following steps of; the synchronizing assembly comprises a synchronizing shaft, a transmission pin, synchronizing seats and synchronizing contact arms, a set of synchronizing seats and a set of circuit breaking units are correspondingly connected and are correspondingly installed with two sets of synchronizing contact arms, the multiple sets of synchronizing seats are arranged along the transverse direction, the synchronizing seats are arranged into L-shaped structures, the synchronizing assembly comprises a connecting portion and a fixing portion, synchronizing seat limiting holes are fixedly formed in the connecting portion of the synchronizing seats, two sets of synchronizing seat partition plates are fixedly arranged on the synchronizing seat fixing portion, synchronizing seat penetrating cavities are formed between the synchronizing seat partition plates and the connecting portion, the synchronizing contact arms comprise synchronizing contact arm upper blocks connected with the synchronizing seats and are used for being connected with a connecting assembly to synchronizing contact arm bottom plates, driving hole synchronizing contact arm jacks are fixedly formed in the synchronizing contact arm upper blocks and penetrate through the synchronizing contact arm bottom plates, and synchronizing shaft center lines of the synchronizing shaft and coaxial operating hole center lines of a switch front plate are arranged.

Further, the method comprises the following steps of; the synchronous contact arm jack is of a hexagonal structure, the synchronous shaft is of a hexagonal prism structure, six faces of the outer surface of the synchronous shaft are respectively abutted against six sides of the drive hole synchronous contact arm jack, a slide hole synchronous contact arm guide hole is fixedly arranged on the other side of the synchronous contact arm base plate, synchronous contact arm fixing holes are symmetrically formed in the peripheral side face of the synchronous contact arm base plate, the synchronous contact arm fixing holes are communicated with the drive hole synchronous contact arm jack, the six faces of the outer surface of the synchronous shaft are respectively abutted against six sides of the drive hole synchronous contact arm jack, synchronous shaft fixing holes matched with the synchronous contact arm fixing holes are formed in the synchronous shaft, synchronous contact arm upper blocks are respectively inserted into synchronous seat limiting holes, the synchronous shaft penetrates through the synchronous contact arm jack and the synchronous seat limiting holes of the synchronous seat, and a third fastener penetrates through the synchronous contact arm fixing holes and the synchronous shaft fixing holes to fix the synchronous shaft on the synchronous contact arm.

Further, the method comprises the following steps of; the utility model discloses a structure of a sliding hole, including drive pin, connecting rod, gyro wheel lug, separation blade, snap spring, connecting rod guide hole, the connecting hole that the drive pin was provided with the indent, the drive pin is along transversely running through the connecting hole of head rod and the connecting rod guiding hole of second connecting rod in proper order, two tip of drive pin run through the contemporary seat and wear the chamber and be connected with the gyro wheel, gyro wheel side end has set firmly the gyro wheel lug, the gyro wheel has set firmly the gyro wheel jack on the gyro wheel, the gyro wheel is located the sliding hole in the contemporary contact arm guiding hole and is connected with the cooperation of sliding hole contemporary contact arm guiding hole, be provided with the anticreep subassembly on the drive pin, the anticreep subassembly includes separation blade and jump ring, the separation blade jack that runs through has set firmly on the separation blade, separation blade.

Further, the method comprises the following steps of; the permanent magnetic mechanism, the insulating part, the connecting assembly, the contact pressure spring, the conducting strip and the vacuum arc extinguish chamber of the circuit breaking unit are sequentially linearly arranged from top to bottom along the longitudinal direction.

Further, the method comprises the following steps of; the movable core iron pull rod, the insulating part, the first connecting rod, the second connecting rod and the vacuum arc extinguish chamber are coaxially arranged along the longitudinal direction, the insulating part is connected with the movable core iron pull rod and is provided with a tightening assembly, the tightening assembly comprises a tightening nut, a gasket and a bottom plate, the tightening nut is positioned on the upper side, the gasket is positioned between the tightening nut and the bottom plate, two groups of bosses are fixedly arranged at two ends of one group of supports respectively, second through holes matched with the bosses are arranged on two groups of fixing supports, the frame is fixedly connected with the two groups of fixing supports through matching of the bosses and the second through holes, a movable contact and a static contact are arranged in the vacuum arc extinguish chamber, the movable contact is positioned above the static contact and longitudinally moves relative to the static contact, the static contact and the static contact are detachably connected in the vacuum chamber, a movable end cover plate is arranged at the upper end of the vacuum arc extinguish chamber and is positioned on the lower surface of the conducting plate, and the conducting plate is electrically connected with the movable contact, the switch static contact is electrically connected with the static contact.

To sum up, the utility model discloses an useful part lies in:

1) the permanent magnet vacuum circuit breaker adopts the direct drive design, reduces a plurality of transmission links, reduces energy consumption and ensures the transmission efficiency to the maximum extent;

2) the utility model discloses a permanent magnetism vacuum circuit breaker is whole miniaturized design, can improve the reliability of the circuit breaking of aerifing the cabinet to and obtain faster cut-off time.

3) The utility model discloses a permanent magnetic mechanism's combined floodgate relies on the electromagnetic force, and the combined floodgate position relies on the magnetic circuit to keep, and the separating brake improves initial velocity by the electromagnetic force, and the back is provided by separating brake spring and circuit breaker contact spring, and transmission parts only has the actuating lever, can provide the function of closing the separating brake fast. The method has the characteristics of no maintenance and low failure rate.

4) The utility model discloses an adopt with the time axis, with the time contact arm and the mutual restriction cooperation of gyro wheel, for the circuit breaker closes the separating brake and provides synchronous structural control, reciprocate through the gyro wheel, with the luffing motion of contacting the arm in the time, can drive the rotation of with the time axis, with two positions of time axis pivoted and provided the change of closing separating brake position indication.

5) The utility model discloses the design has the shield, prevents that the dust from getting into the mechanism, guarantees the reliability and the operating stability of mechanism's action.

6) The utility model discloses moving the iron core and establishing and milling flat structure and screw hole, milling flat structure and changing the size of overstroke and opening distance through the adjustment screw in degree of depth, connecting the demand that test sensor reached the test through the screw hole.

7) The utility model discloses set up at the head rod and mill flat structure, improve the rationality in conducting strip and insulating part installation to improve assembly efficiency and technological effect.

Drawings

Fig. 1 is a schematic view of the device of the present invention.

Fig. 2 is a schematic view of the direction a in fig. 1.

Fig. 3 is a schematic view of the middle fixing bracket of the present invention.

Fig. 4 is a schematic sectional view of C-C in fig. 2.

Fig. 5 is a schematic view of the middle dust cover of the present invention.

Fig. 6 is an enlarged schematic view of B in fig. 1.

Fig. 7 is a schematic view of the middle and lower support of the present invention.

Fig. 8 is a schematic view of a first connecting rod according to the present invention.

Fig. 9 is a schematic view of a second connecting rod of the present invention.

Fig. 10 is a schematic diagram of a middle conductive sheet according to the present invention.

Fig. 11 is a schematic view of the spring pad of the present invention.

Fig. 12 is a schematic view of a synchronization seat of the present invention.

Fig. 13 is a schematic view of a middle synchronization contact arm of the present invention.

Fig. 14 is a schematic view of a synchronization axis of the present invention.

Fig. 15 is a schematic view of the middle driving pin of the present invention.

Fig. 16 is a schematic view of the middle roller of the present invention.

Fig. 17 is a schematic view of a middle baffle of the present invention.

Fig. 18 is a schematic view of a clamp spring according to the present invention.

The labels in the figure are: the connecting rod comprises a grounding plate 10, a switch front plate 11, an operation hole 111, a fixing bracket 12, a first through hole 121, a second through hole 122, a first mounting hole 123, a second mounting hole 124, a mechanism fixing plate 14, a lower bracket 15, a first through hole 152, a third mounting hole 154, a contemporary seat 16, a contemporary seat limiting hole 161, a contemporary seat partition plate 162, a contemporary seat through cavity 163, a bracket 17, a permanent magnet mechanism 20, a dust cover 200, an outer yoke 201, a coil 202, a lower yoke 203, an upper yoke 204, a separating brake spring 205, a moving core pull rod 206, a protrusion 2061, an inner yoke 207, a magnetic block 208, an outlet hole 209, a tight nut 211, a gasket 212, a bottom plate 213, an insulating piece 22, an upper threaded hole 221, a lower threaded hole 222, a threaded rod connecting assembly 23, a first connecting rod 231, a connecting rod inner cavity 2311, a ring block 2312, a connecting hole 2313, a threaded rod body 2314, a connecting rod body 2315, a second connecting rod 232, a connecting rod guide hole 2321, a connecting rod moving end 2322, and a connecting rod moving end 2322, The connecting rod limiting end 2323, the connecting rod fixing end 2324, the connecting rod supporting end 2325, the conducting strip 24, the second through hole 241, the contact pressure spring 25, the spring pad 26, the first supporting hole 261, the second supporting hole 262, the moving end cover plate 27, the vacuum arc-extinguishing chamber 28, the moving contact 281, the static contact 282, the switch static contact 29, the synchronizing shaft 31, the synchronizing shaft fixing hole 311, the synchronizing contact arm 32, the synchronizing contact arm jack 321, the synchronizing contact arm guide hole 322, the synchronizing contact arm bottom plate 323, the synchronizing contact arm upper block 324, the synchronizing contact arm fixing hole 325, the transmission pin 33, the groove 331, the roller 34, the roller jack 341, the roller bump 342, the blocking piece 35, the blocking piece jack 351, the snap spring 36 and the snap spring block 361.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

All directional indicators (such as upper, lower, left, right, front, rear, horizontal, vertical … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, if the specific posture changes, the directional indicator changes accordingly.

The first embodiment is as follows:

as shown in fig. 1 to 18, a permanent magnet vacuum circuit breaker includes a circuit breaking unit and a receiving device for installing the circuit breaking unit, the circuit breaking unit includes a permanent magnet mechanism 20, an insulating member 22, a connecting assembly 23, a contact pressure spring 25, a conducting strip 24, a vacuum arc-extinguishing chamber 28, a switch static contact 29, and a synchronizing assembly, the permanent magnet mechanism 20 includes a moving core iron pull rod 206 and a dust cap 200 protecting the moving core iron pull rod 206, the connecting assembly 23 includes a first connecting rod 231, the moving core iron pull rod 206 and the first connecting rod 231 are respectively provided with a milled flat structure, the synchronizing assembly includes a synchronizing shaft 31, a transmission pin 33, a synchronizing seat 16 and a synchronizing contact arm 32, and the synchronizing seat 16 guides the synchronizing shaft 31 and the transmission pin 33 respectively.

The bearing device comprises a switch front plate 11, a fixed bracket 12, a mechanism fixing plate 14 for supporting a permanent magnetic mechanism 20, a bracket 17 for supporting a vacuum arc-extinguishing chamber 28 and a lower bracket 15, wherein two groups of fixed brackets 12 are symmetrically arranged, the switch front plate 11 is arranged between the two groups of fixed brackets 12, the number of the mechanism fixing plate 14, the lower bracket 15, the bracket 17 and a conducting plate 24 is matched with the number of circuit breaking units, specifically, the mechanism fixing plate 14, the lower bracket 15, the bracket 17 and the conducting plate 24 of one group are matched and connected with one group of circuit breaking units, the one-phase permanent magnetic mechanism 20 is fixed on the mechanism fixing plate 14, the condition that a three-phase transmission structure faces one reference is overcome, so that the adjustment is not easy to occur, the assembly efficiency is improved, the mechanism fixing plate 14 and the lower bracket 15 are fixedly connected between the fixed brackets 12, specifically, the mechanism fixing plate 14 comprises a horizontal supporting surface and a vertical mounting surface, the horizontal supporting surface of the mechanism fixing plate 14 is fixedly connected with the permanent magnetic mechanism 20 and plays a role of supporting the permanent magnetic mechanism 20, in the embodiment, four groups of vertical mounting surfaces of one group of the mechanism fixing plate 14 are arranged in number and are symmetrically and fixedly arranged on two sides of the horizontal supporting surface, the vertical mounting surfaces of the mechanism fixing plate 14 are respectively connected with opposite side surfaces of two groups of fixing supports 12, the lower support 15 comprises the horizontal supporting surface and the vertical mounting surface, first through holes 152 which penetrate through the horizontal supporting surface up and down are fixedly arranged on the horizontal supporting surface of the lower support 15, in the embodiment, two groups of vertical mounting surfaces of the lower support 15 are arranged and are symmetrically and fixedly arranged on two sides of the horizontal supporting surface, two groups of third mounting holes 154 which are transversely arranged are fixedly arranged on the vertical mounting surface of the lower support 15, second mounting holes 124 corresponding to the third mounting holes 154 are fixedly arranged on the fixing supports 12, and first fasteners are connected between the fixing supports 12 and the lower support 15, the first fastening member sequentially penetrates through the second mounting hole 124 and the third mounting hole 154, so as to fixedly connect the fixing bracket 12 with the lower bracket 15, in this embodiment, the mechanism fixing plate 14, the conductive sheet 24, the bracket 17 and the lower bracket 15 are sequentially distributed and arranged from top to bottom along a straight line.

In this embodiment, three sets of circuit breaking units are arranged side by side, in order to ensure the stability of the three sets of circuit breaking units, the upper end surface of the permanent magnetic mechanism 20 of the adjacent circuit breaking unit is connected with the grounding plate 10, the three sets of circuit breaking units have the same structure, and the following description is given by taking one circuit breaking unit as an example, the permanent magnetic mechanism 20 of the circuit breaking unit, the insulating part 22, the connecting component 23, the contact pressure spring 25, the conducting plate 24, the vacuum arc-extinguishing chamber 28 and the switch static contact 29 are linearly arranged from top to bottom in sequence along the longitudinal direction, so that the circuit breaking unit structures are distributed from top to bottom, the permanent magnetic mechanism is located at the top of the circuit breaking unit, and by adopting a direct-drive design, many transmission links are reduced, and the loss of transmission force is avoided.

The permanent magnet mechanism 20 comprises a moving core iron pull rod 206, an outer yoke 201, an inner yoke 207, a switching-off spring 205, a magnetic block 208, a lower yoke 203, an upper yoke 204 and a coil 202, wherein the outer yoke 201 is positioned at the outer side and is internally provided with a containing cavity (not shown), the side surface of the outer yoke 201 is provided with an outlet hole 209 of the coil 202 communicated with the containing cavity, the lower yoke 203 is arranged above the outer yoke 201, the upper yoke 204 is arranged below the outer yoke 201, the inner yoke 207 and the coil 202 are arranged in the containing cavity of the outer yoke 201, the coil 202 is positioned at the lower side of the inner yoke 207, the moving core iron pull rod 206 sequentially penetrates through the lower yoke 203, the inner yoke 207, the coil 202 and the upper yoke 204, the upper end of the moving core iron pull rod 206 extends to the outside through the lower yoke 203, the lower end of the moving core iron pull rod 206 extends to the outside through the upper yoke 204, a dust cap 200 covering the upper end of the moving core iron pull rod 206 is fixedly arranged above the lower yoke 203, the dustproof cover 200 comprises a cover plate 2001, wherein mounting holes 2006 distributed in an annular shape are fixedly formed in the cover plate 2001, the dustproof cover 200 is fixedly connected with a lower magnetic yoke 203 through the mounting holes 2006, a central cavity 2005 and sub-cavities 2004 distributed in the circumference are fixedly formed in the side face, opposite to the lower magnetic yoke 203, of the cover plate 2001, a first vent groove 2003 is communicated between the sub-cavities 2004 and the central cavity 2005, a second vent groove 2002 is communicated between the sub-cavities 2004 and the external space, the central cavity 2005, the first vent groove 2003, the sub-cavities 2004 and the second vent groove 2002 form a gas circulation channel, gas inside and outside the cavity is exchanged through the gas circulation channel, meanwhile, the gas pressure inside and outside the cavity is kept consistent through the gas circulation channel, so that the dustproof cover 200 is convenient to mount and dismount, in addition, in order to facilitate taking of the dustproof cover 200, a plurality of convex lines are fixedly arranged on the outer surface of the dustproof cover 200, the ribs increase the friction.

An outer convex protrusion 2061 is fixedly arranged on the outer surface of the movable core iron pull rod 206, an inner concave side groove (not marked in the figure) is arranged at a position corresponding to a through passage of the movable core iron pull rod 206, the lower end surface of the protrusion 2061 abuts against the lower end surface of the side groove, when the movable core iron pull rod 206 is subjected to downward force, the protrusion 2061 is separated from the state of abutting against the side groove and drives the opening spring 205 to be compressed, the matching structure of the protrusion 2061 and the side groove is used for positioning the installation of the movable core iron pull rod 206 on one hand and facilitating the return of the movable core iron pull rod 206 to a set initial position on the other hand, in the embodiment, the transmission part of the permanent magnetic mechanism 20 only has the movable core iron pull rod 206, so that the purpose of fast opening and closing is realized, the movable core iron pull rod 206 has the characteristics of maintenance free and low failure rate, the opening spring 205 is sleeved on the outer surface of the movable core iron pull rod 206, the opening spring 205 abuts against the upper magnetic yoke 204 and is fixedly connected on the mechanism fixing plate 14, the magnetic block 208 is made of a magnetic material, and in this embodiment, a neodymium iron boron magnetic material with a trademark of N38H is used to ensure the magnetic attraction strength.

The rim 22 is made of an insulating material, two ends of the insulating member 22 are respectively provided with an upper threaded hole 221 and a lower threaded hole 222, in this embodiment, the upper threaded hole 221 is provided as an upper end portion of the insulating member 22, the lower threaded hole 222 is provided as a lower end portion of the insulating member 22, the upper threaded hole 221 is connected with the moving core pull rod 206, the lower threaded hole 222 is connected with the connecting assembly 23, the connecting assembly 23 includes a first connecting rod 231 and a second connecting rod 232 which are coaxially connected, the first connecting rod 231 includes a threaded rod 2314, a connecting rod main body 2315 and a ring block 2312, the threaded rod 2314 and the ring block 2312 are respectively fixed at two ends of the connecting rod main body 2315, in this embodiment, the diameter of the threaded rod 2314 is smaller than that of the connecting rod main body 2315, the diameter of the ring block 2312 is larger than that of the connecting rod main body 2315, a connecting rod cavity 2311 which sequentially penetrates through the connecting rod main body 2315 and the ring block 2312 along the axial direction is arranged in the first connecting rod 231, a connecting hole 2313 which penetrates along the transverse direction is fixed on the connecting rod main body 2315, the connection holes 2313 extend through the rod cavity 2311 and the threaded rods 2314 are connected to the lower threaded holes 222 of the insulator 22.

In order to enhance the installation tightness of the insulator 22 and the moving core pull rod 206, a tight assembly is arranged between the insulator 22 and the moving core pull rod 206, the tight assembly comprises a tight nut 211, a gasket 212 and a bottom plate 213, the tight nut 211 is arranged on the upper side, and the gasket 212 is arranged between the tight nut 211 and the bottom plate 213.

In order to meet the requirements of characteristic adjustment and testing of the circuit breaker, the upper end of the movable core iron pull rod 206 is set to be of a milling flat structure, the lower end of the movable core iron pull rod 206 is provided with a threaded hole, the circuit breaker is in a switching-off state, the tight nut 211 between the permanent magnetic mechanism 20 and the insulating part 22 can adjust the screwing-in depth through the milling flat structure to change the size of the over-travel and the opening distance, a threaded hole is formed in the milling flat structure of the movable core iron pull rod 206, and the testing sensor can be connected through the threaded hole to meet the testing requirements.

The connecting rod main part 2315 upper end of head rod 231 is provided with mills flat structure, can improve the rationality in assembly and insulating part 22 installation, and improve assembly efficiency and technological effect, compress the in-process of conducting strip 24 with the assembly of vacuum interrupter 28 at head rod 231, can compress tightly 28 with vacuum interrupter 24 through milling flat structure locking screw, in the assembly process of head rod 231 and insulating part 22 simultaneously, can be through the flat structure application of force of milling of head rod 231, reach the locking purpose between two parts.

The second connecting rod 232 is composed of a connecting rod moving end 2322, a connecting rod supporting end 2325, a connecting rod limiting end 2323 and a connecting rod fixing end 2324, the connecting rod moving end 2322 is transversely provided with connecting rod guide holes 2321 in a penetrating manner, the connecting rod moving end 2322 extends into the connecting rod cavity 2311, the connecting rod guide holes 2321 are opposite to the connecting holes 2313, the connecting rod guide holes are transversely communicated, the second connecting rod 232 is connected with the conducting strips 24, the conducting strips 24 are transversely distributed, penetrate through the first through holes 121 from left to right at two sides and are connected with the two groups of fixing supports 12, the conducting strips 24 are longitudinally provided with second through holes 241 in a penetrating manner, in the embodiment, the second through holes 241 are provided with square holes, the length and width of the second through holes 241 are matched with the length and width of the connecting rod limiting end 2323, the connecting rod limiting end 2323 is installed in the second through holes 241, a spring cushion 26 is arranged between the second connecting rod 232 and the conducting strips 24, the spring cushion 26 is arranged on the upper side of the conducting strips 24, the spring pad 26 is provided with a hole assembly with a cross section of a stepped structure, the hole assembly comprises a first supporting hole 261 and a second supporting hole 262, the diameter of the first supporting hole 261 is larger than that of the second supporting hole 262, the diameter of the first supporting hole 261 is matched with that of a connecting rod supporting end 2325, the connecting rod supporting end 2325 is installed in the first supporting hole 261, the lower side face of the connecting rod supporting end 2325 abuts against the lower side face of the first supporting hole 261, the connecting assembly 23 is limited within a set moving range through the structure, the contact pressure spring 25 is sleeved on the outer surface of the second connecting rod 232, the upper end of the contact pressure spring 25 abuts against the ring block 2312, and the lower end of the contact pressure spring 25 abuts against the spring pad 26.

The vacuum arc-extinguishing chamber 28 is fixed between the two sets of fixing supports 12 through the support 17, specifically, in this embodiment, two sets of bosses (not shown) are respectively fixed at two ends of one set of support 17, the two sets of fixing supports 12 are provided with the second through holes 122 which are installed in cooperation with the bosses, the support 17 is fixedly connected with the two sets of fixing supports 12 through the cooperation of the bosses and the second through holes 122, the vacuum arc-extinguishing chamber 28 is provided with a moving contact 281 and a fixed contact 282, the moving contact 281 is located above the fixed contact 282, the moving contact 281 longitudinally moves relative to the fixed contact 282, the moving contact 281 and the fixed contact 282 are detachably connected in the vacuum chamber, the vacuum arc-extinguishing chamber 28 is provided with a moving end cover 27 at an upper end, the moving end cover 27 is located at a lower surface of the conducting strip 24, a connecting rod fixing end 2324 of the second connecting rod 232 penetrates through the spring pad 26 and the second through hole 241 and then is connected with the moving contact 281, the conductive sheet 24 is electrically connected to the moving contact 281, and the switch stationary contact 29 is electrically connected to the stationary contact 282.

The moving core rod 206, the insulator 22, the first connecting rod 231, the second connecting rod 232, the vacuum interrupter 28, the moving contact 281, and the stationary contact 282 are coaxially arranged in the longitudinal direction.

In order to ensure the consistency of the operation of the three groups of circuit breaking units, a synchronization assembly is further provided in this example, the synchronization assembly includes a synchronization shaft 31, a transmission pin 33, a synchronization seat 16 and a synchronization contact arm 32, the synchronization seat 16 is set to be an L-shaped structure and includes a connection portion (not shown) and a fixing portion (not shown), a front-back through synchronization seat limiting hole 161 is fixedly provided on the connection portion of the synchronization seat 16, two groups of synchronization seat partition plates 162 are fixedly provided on the fixing portion of the synchronization seat 16, a synchronization seat through cavity 163 is formed between the synchronization seat partition plates 162 and the connection portion, a first mounting hole 123 is fixedly provided on the fixing support 12 at a corresponding position, the synchronization seat 16 is fixedly provided on the fixing support 12 through the first mounting hole 123, the number of the synchronization seats 16 corresponds to the number of the circuit breaking units, that is, a group of the synchronization seats 16 is correspondingly connected to a group of circuit breaking units, and the three groups of synchronization seats 16 are arranged in the transverse direction in this embodiment.

The number of the same-phase contact arms 32 corresponds to the number of the same-phase seats 16, two groups of the same-phase contact arms 32 are correspondingly installed on one group of the same-phase seats 16, each same-phase contact arm 32 comprises a same-phase contact arm upper block 324 connected with the same-phase seat 16 and a same-phase contact arm bottom plate 323 connected with the connecting assembly 23, the same-phase contact arm upper block 324 is installed on the same-phase contact arm bottom plate 323 on one side, the shape structure of the same-phase contact arm upper block 324 is matched with the same-phase seat limiting hole 161, in the embodiment, the same-phase seat limiting hole 161 is a cylindrical cavity, the same-phase contact arm upper block 324 is a cylindrical structure, the outer diameter size of the same-phase contact arm upper block 324 is matched with the inner diameter size of the same-phase seat limiting hole 161, a penetrating driving hole same-phase contact arm jack 321 is fixedly arranged on the same-phase contact arm upper block 324, the driving hole same-phase contact arm jack 321 penetrates through the same-phase contact arm bottom plate 323, the driving hole same-phase contact arm jack 321 is a hexagonal structure, a penetrating sliding hole same-phase contact arm guide hole 322 is fixedly arranged on the other side of the same-phase contact arm bottom plate 323, the slide hole synchronization contact arm guide hole 322 is set to be a waist circular hole structure, synchronization contact arm fixing holes 325 are symmetrically arranged on the peripheral side surface of a synchronization contact arm base plate 323, the synchronization contact arm fixing holes 325 are communicated with the drive hole synchronization contact arm jack 321, a synchronization shaft 31 is set to be a hexagonal prism structure, six surfaces of the outer surface of the synchronization shaft 31 are respectively abutted against six sides of the drive hole synchronization contact arm jack 321 to avoid rotation between the synchronization shaft 31 and the drive hole synchronization contact arm jack 321, two groups of synchronization contact arms 32 are respectively arranged on two sides of a synchronization seat 16, a synchronization shaft fixing hole 311 matched with the synchronization contact arm fixing hole 325 is arranged on the synchronization shaft 31, synchronization contact arm upper blocks 324 are respectively inserted into the synchronization seat limiting holes 161, the synchronization shaft 31 passes through the synchronization contact arm jack 321 and the synchronization seat limiting hole 161 of the synchronization seat 16, a third fastener passes through the synchronization contact arm fixing holes 325 and the synchronization shaft fixing holes 311 to fix the synchronization shaft 31 on the synchronization arm 32, further guarantee to drive synchronizing shaft 31 and rotate when synchronizing contact arm 32 rotates, reach the purpose of fixed synchronizing contact arm 32 and mutual restriction, and synchronizing contact arm 32 rotates around synchronizing shaft 31's axis, and synchronizing shaft 31 central line sets up with the handle hole 111 central line of switch front bezel 11 coaxial.

The upper and lower sides of the driving pin 33 are provided with concave grooves 331, the driving pin 33 sequentially passes through the connecting hole 2313 of the first connecting rod 231 and the connecting rod guide hole 2321 of the second connecting rod 232 along the transverse direction, two end portions of the driving pin 33 pass through the contemporary seat through cavity 163 and are connected with the roller 34, a roller bump 342 is fixedly arranged on one side end surface of the roller 34, a penetrated roller jack 341 is fixedly arranged on the roller 34, the roller 34 is positioned in the sliding hole contemporary contact arm guide hole 322 and is matched, slid or rotationally connected with the sliding hole contemporary contact arm guide hole 322, and the axial direction of the driving pin 33 is perpendicular to the axial direction of the connecting assembly 23, so as to realize the hinged connection of the connecting assembly 23 and the contemporary contact arm 32, in order to ensure the connection stability of the connecting assembly 23 and the contemporary contact arm 32 and avoid the falling-off accident, the driving pin 33 is provided with an anti-off assembly, which comprises a blocking piece 35 and a snap spring 36, the blocking piece 35 is fixedly provided with a penetrated blocking piece jack 351, the diameter of the baffle insertion hole 351 is matched with that of the roller convex block 342, the baffle 35 is installed on the roller convex block 342, the clamp spring 36 is of a circular ring structure, the inner diameter of the clamp spring 36 is matched with the groove 331, the clamp spring 36 is clamped with the groove 331, and the clamp spring stop 361 for stopping the baffle 35 is fixedly arranged on the circumferential side face of the clamp spring 36.

The synchronous shaft 31 and the synchronous contact arm 32 are mutually restricted and matched with the roller 34, synchronous structural control is provided for switching on and off of the circuit breaking unit, the circuit breaker switches on and off, the roller moves up and down, the synchronous contact arm 32 swings up and down to drive the synchronous shaft 31 to rotate, and the two positions of the synchronous shaft 31 in rotation provide the change of switching on and off position indication.

In this embodiment, the connecting assemblies 23 of the three groups of circuit breaking units are all connected with the synchronizing shaft 31, and then the synchronizing assemblies connect the connecting assemblies 23 of the three groups of circuit breaking units in a synchronized linkage manner. In the embodiment, when a closing instruction is obtained, the three-phase permanent magnet mechanism obtains closing energy, and then sequentially drives the moving core iron pull rod 206, the insulating member 22, the first connecting rod 231, the second connecting rod 232, and the moving contact 281 to move downward, so that the moving contact 281 is connected with the static contact 282 to complete closing operation, the contact pressure spring 25 and the opening spring 205 are compressed to accumulate elastic potential energy, and at this time, the permanent magnet mechanism 20 is kept at the current position through the magnetic block 208, and in the whole closing process, the connecting member 23 moves downward to drive the synchronous contact arm 32 to rotate, so as to drive the synchronous rotation of the synchronous shaft 31, and under the synchronous rotation action of the synchronous shaft 31, the synchronous action is realized. When a switching-off instruction is obtained, the three-phase permanent magnet mechanism obtains the switching-off instruction, after the electromagnetic force generated by the mechanism overcomes the magnetic circuit switching-on holding force, the contact pressure spring 25 and the switching-off spring 205 release elastic potential energy, so that the moving core iron pull rod 206, the insulating part 22, the first connecting rod 231, the second connecting rod 232 and the moving contact 281 are restored to an initial state to realize switching-off, namely, the initial speed of the switching-off is increased by the electromagnetic force, then the initial speed is provided by the contact pressure spring 25 and the switching-off spring 205, and the switching-off synchronization is realized by the action of the synchronization shaft 31.

In this embodiment, the permanent magnetic mechanism that the unit that opens circuit adopted direct drive formula design provides fast and stable separating brake characteristic for permanent magnetism vacuum circuit breaker, and the separating brake time is not more than 15ms, and the cooperation protects the export, under the circumstances of considering the arcing time, can guarantee completely to keep apart the trouble under 55 ms. In the distribution protection, can be fast isolation trouble, reduce the power failure scope, confirm the fault point, in distribution network automation, play important effect.

The permanent magnet vacuum circuit breaker in the embodiment is designed in an overall miniaturization mode, the reliability of the circuit breaking of the gas-filled cabinet can be improved, and faster on-off time can be obtained.

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Claims (10)

1. A permanent magnet vacuum circuit breaker, characterized in that: including the unit of opening a circuit and being used for installing the supporting device who opens a circuit the unit, the unit of opening a circuit includes permanent magnetic mechanism, insulating part, coupling assembling, contact pressure spring, conducting strip, vacuum interrupter, switch static contact and contemporary subassembly, and permanent magnetic mechanism includes moving the core iron pull rod and to moving the shield that the core iron pull rod protected, and coupling assembling includes the head rod, moves core iron pull rod and head rod and is equipped with respectively and mills flat structure.

2. The permanent magnet vacuum interrupter of claim 1, wherein: the supporting device comprises a switch front plate, a fixed support, a mechanism fixing plate for supporting a permanent magnet mechanism, a support and a lower support for supporting the vacuum arc extinguish chamber, the fixed support is provided with two groups and is symmetrically arranged, the switch front plate is arranged between the two groups of fixed supports, the mechanism fixing plate comprises a horizontal supporting surface for supporting and a vertical mounting surface for fixing, the mechanism fixing plate comprises a group of mechanism fixing plates, the lower support, a support and a conducting plate are connected with a group of circuit breaking units in a matched mode, one-phase permanent magnet mechanism is fixed on the group of mechanism fixing plates, the mechanism fixing plate and the lower support are fixedly connected between the fixed support, the mechanism fixing plate, the conducting plate, the support and the lower support are sequentially distributed and arranged from top to bottom along a straight line.

3. The permanent magnet vacuum interrupter of claim 1, wherein: the permanent magnet mechanism further comprises an outer yoke, an inner yoke, a separating brake spring, a magnetic block, a lower magnetic yoke, an upper magnetic yoke and a coil, wherein a wire outlet hole is formed in the side face of the outer yoke, a moving core pull rod sequentially penetrates through the lower magnetic yoke, the inner yoke, the coil and the upper magnetic yoke, an outer convex protrusion is fixedly arranged on the outer surface of the moving core pull rod, an inner concave side groove is formed in the corresponding position of a penetrating channel of the moving core pull rod, the lower end face of the protrusion abuts against the lower end face of the side groove, the separating brake spring is sleeved on the outer surface of the moving core pull rod, the separating brake spring abuts between the upper magnetic yoke and the moving core pull rod, the magnetic block is made of a magnetic material, and the lower magnetic yoke and the upper magnetic yoke are fixedly arranged at two ends of the outer yoke respectively.

4. The permanent magnet vacuum interrupter of claim 1, wherein: the shield includes the apron, the mounting hole that the annular distributes has set firmly on the apron, set firmly the shield through the mounting hole and be connected with lower yoke, the apron sets firmly the branch chamber that central chamber and circumference distribute with the side that lower yoke is relative, divide the chamber and be provided with first air channel with the intercommunication between central chamber, divide the chamber to be provided with the second air channel with the exterior space intercommunication, the central chamber, first air channel, divide chamber and second air channel to constitute the circulation of gas passageway, exchange the inside and outside gas in cavity through the circulation of gas passageway, the surface of shield sets firmly a plurality of wales.

5. The permanent magnet vacuum interrupter of claim 1, wherein: the insulating part is made by insulating material, the both ends of insulating part set up respectively to go up the screw hole and screw hole down, it is connected with moving the core iron pull rod to go up the screw hole, screw hole and coupling assembling are connected down, coupling assembling includes coaxial coupling's head rod and second connecting rod, the head rod includes the threaded rod, connecting rod main part and ring block, the connecting rod main part is provided with mills flat structure, the second connecting rod is moved the end by the connecting rod, the connecting rod supports the end, spacing end of connecting rod and connecting rod stiff end constitute, be provided with the spring pad between second connecting rod and conducting strip, the contact pressure spring cover is established at the second connecting rod surface, the upper end of contact pressure spring offsets with the ring block, the lower tip and the spring pad of contact pressure spring offset.

6. The permanent magnet vacuum interrupter of claim 1, wherein: the synchronizing assembly comprises a synchronizing shaft, a transmission pin, synchronizing seats and synchronizing contact arms, a set of synchronizing seats and a set of circuit breaking units are correspondingly connected and are correspondingly installed with two sets of synchronizing contact arms, the multiple sets of synchronizing seats are arranged along the transverse direction, the synchronizing seats are arranged into L-shaped structures, the synchronizing assembly comprises a connecting portion and a fixing portion, synchronizing seat limiting holes are fixedly formed in the connecting portion of the synchronizing seats, two sets of synchronizing seat partition plates are fixedly arranged on the synchronizing seat fixing portion, synchronizing seat penetrating cavities are formed between the synchronizing seat partition plates and the connecting portion, the synchronizing contact arms comprise synchronizing contact arm upper blocks connected with the synchronizing seats and are used for being connected with a connecting assembly to synchronizing contact arm bottom plates, driving hole synchronizing contact arm jacks are fixedly formed in the synchronizing contact arm upper blocks and penetrate through the synchronizing contact arm bottom plates, and synchronizing shaft center lines of the synchronizing shaft and coaxial operating hole center lines of a switch front plate are arranged.

7. The permanent magnet vacuum interrupter of claim 6, wherein: the synchronous contact arm jack is of a hexagonal structure, the synchronous shaft is of a hexagonal prism structure, six faces of the outer surface of the synchronous shaft are respectively abutted against six sides of the drive hole synchronous contact arm jack, a slide hole synchronous contact arm guide hole is fixedly arranged on the other side of the synchronous contact arm base plate, synchronous contact arm fixing holes are symmetrically formed in the peripheral side face of the synchronous contact arm base plate, the synchronous contact arm fixing holes are communicated with the drive hole synchronous contact arm jack, the six faces of the outer surface of the synchronous shaft are respectively abutted against six sides of the drive hole synchronous contact arm jack, synchronous shaft fixing holes matched with the synchronous contact arm fixing holes are formed in the synchronous shaft, synchronous contact arm upper blocks are respectively inserted into synchronous seat limiting holes, the synchronous shaft penetrates through the synchronous contact arm jack and the synchronous seat limiting holes of the synchronous seat, and a third fastener penetrates through the synchronous contact arm fixing holes and the synchronous shaft fixing holes to fix the synchronous shaft on the synchronous contact arm.

8. The permanent magnet vacuum interrupter of claim 6, wherein: the utility model discloses a structure of a sliding hole, including drive pin, connecting rod, gyro wheel lug, separation blade, snap spring, connecting rod guide hole, the connecting hole that the drive pin was provided with the indent, the drive pin is along transversely running through the connecting hole of head rod and the connecting rod guiding hole of second connecting rod in proper order, two tip of drive pin run through the contemporary seat and wear the chamber and be connected with the gyro wheel, gyro wheel side end has set firmly the gyro wheel lug, the gyro wheel has set firmly the gyro wheel jack on the gyro wheel, the gyro wheel is located the sliding hole in the contemporary contact arm guiding hole and is connected with the cooperation of sliding hole contemporary contact arm guiding hole, be provided with the anticreep subassembly on the drive pin, the anticreep subassembly includes separation blade and jump ring, the separation blade jack that runs through has set firmly on the separation blade, separation blade jack diameter matches with gyro wheel lug diameter, the separation blade is installed on the gyro wheel lug, the jump ring sets up to ring type structure, jump ring internal diameter and groove phase match, jump ring and groove joint, the circumference side sets firmly the jump ring dog that is used for blockking the separation blade.

9. The permanent magnet vacuum interrupter of claim 1, wherein: the permanent magnetic mechanism, the insulating part, the connecting assembly, the contact pressure spring, the conducting strip and the vacuum arc extinguish chamber of the circuit breaking unit are sequentially linearly arranged from top to bottom along the longitudinal direction.

10. The permanent magnet vacuum interrupter of claim 1, wherein: the movable core iron pull rod, the insulating part, the first connecting rod, the second connecting rod and the vacuum arc extinguish chamber are coaxially arranged along the longitudinal direction, the insulating part is connected with the movable core iron pull rod and is provided with a tightening assembly, the tightening assembly comprises a tightening nut, a gasket and a bottom plate, the tightening nut is positioned on the upper side, the gasket is positioned between the tightening nut and the bottom plate, two groups of bosses are fixedly arranged at two ends of one group of supports respectively, second through holes matched with the bosses are arranged on two groups of fixing supports, the frame is fixedly connected with the two groups of fixing supports through matching of the bosses and the second through holes, a movable contact and a static contact are arranged in the vacuum arc extinguish chamber, the movable contact is positioned above the static contact and longitudinally moves relative to the static contact, the static contact and the static contact are detachably connected in the vacuum chamber, a movable end cover plate is arranged at the upper end of the vacuum arc extinguish chamber and is positioned on the lower surface of the conducting plate, and the conducting plate is electrically connected with the movable contact, the switch static contact is electrically connected with the static contact.

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