CN113972097A - Compact reclosing circuit breaker - Google Patents

Abstract

A compact reclosing circuit breaker comprises an L-phase pole module and an N-phase pole module, wherein the L-phase pole module and the N-phase pole module are separated through a partition plate; the L-phase pole module comprises a handle structure, an operating mechanism and an L-phase contact mechanism, the N-phase pole module comprises a reclosing module, the reclosing module comprises a circuit board and a driving device connected with the circuit board, the circuit board is arranged on one side of a partition board, the driving device is arranged on the upper portion of the circuit board in a stacking mode and is in linkage connection with the handle structure and the operating mechanism respectively, the N-phase contact mechanism is arranged on the lower portion of the circuit board in a stacking mode, a separation board is arranged between the N-phase contact mechanism and the circuit board, an N-pole moving contact of the N-phase contact mechanism penetrates through the separation board, the circuit board and the partition board are in linkage connection with an L-pole moving contact of the L-phase contact mechanism, and the reclosing module drives the L-phase pole module to move so that the circuit breaker is automatically switched on and off. The reclosing module and the N-phase pole module are combined in the same pole, so that the size of the circuit breaker is reduced.

Description

Compact reclosing circuit breaker

Technical Field

The invention relates to a circuit breaker, in particular to a compact reclosing circuit breaker.

Background

The circuit breaker can be used for infrequent breaking and putting through distribution lines, overload and short-circuit protection are carried out to distribution lines and equipment, can the automatic cutout circuit when distribution lines or equipment take place serious overload or faults such as short circuit, and current circuit breaker has the auto-reclosing function usually, promptly after the circuit breaker drops into normal operating and causes the tripping operation because of the external line trouble, automatic reclosing is once again after short time delay to improve the power supply reliability.

At present, 1PN reclosing circuit breakers in the market are mostly formed by assembling 36mm wide 1PN circuit breakers and 18mm wide motor driving modules, and along with the improvement of national power grids and the application of markets such as intelligent buildings, the assembling structure can not meet the requirements of intellectualization and miniaturization of the circuit breakers gradually.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a compact reclosing circuit breaker with small volume and high reliability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a compact reclosing circuit breaker comprises a shell, an L-phase pole module and an N-phase pole module which are arranged in the shell, the L-phase pole module is separated from the N-phase pole module through a partition plate, the L-phase pole module comprises a handle structure, an operating mechanism and an L-pole contact mechanism, the N-phase pole module comprises a reclosing module and an N-pole contact mechanism, the reclosing module comprises a circuit board and a driving device connected with the circuit board, the circuit board is arranged on one side of the partition board, the driving device is arranged on the circuit board in a stacking mode and is respectively in linkage connection with the handle structure and the operating mechanism, the N-pole contact mechanism is arranged on the circuit board in a stacking mode, and a separation plate is arranged between the N-pole contact mechanism and the circuit board, an N-pole moving contact of the N-pole contact mechanism penetrates through the separation plate, the circuit board and the separation plate to be connected with an L-pole moving contact of the L-pole contact mechanism in a linkage manner, and the reclosing module drives the L-phase pole module to act so as to enable the circuit breaker to be automatically switched on and off.

Furthermore, the N-phase module further comprises an N-pole incoming line terminal and an N-pole outgoing line terminal, the N-pole contact mechanism comprises an N-pole moving contact and an N-pole static contact which are matched with each other, the N-pole moving contact is rotatably installed on the upper portion of the isolation plate and is connected with the N-pole incoming line terminal through a lead, the N-pole static contact comprises an N-pole static contact plate, the N-pole static contact plate is fixedly arranged along one side wall of the isolation plate, one end of the N-pole static contact plate is provided with an N-pole static contact matched with the N-pole moving contact, the N-pole static contact and the N-pole moving contact are arranged oppositely, one end of the N-pole static contact plate, provided with the N-pole static contact, is provided with a static contact arc striking plate, the other end of the N-pole static contact plate is connected with the N-pole outgoing line terminal, and the isolation plate is provided with an arc striking structure corresponding to the N-pole contact mechanism.

Further, the isolation plate comprises a first isolation part for installing the N-pole contact mechanism, an arc striking structure corresponding to the N-pole contact mechanism is arranged on the first isolation part, the arc striking structure comprises an arc striking groove and an arc striking runway which are respectively arranged on the first isolation part, the N-pole moving contact swings above the arc striking groove, and the N-pole static contact is arranged along the arc striking runway.

Furthermore, the division board includes integrated into one piece's first isolation portion and second isolation portion, first isolation portion is the platelike, one side and the second isolation portion of first isolation portion are connected, the second isolation portion is equipped with the mounting groove that is used for installing N utmost point incoming line terminal, the direction bending type that keeps away from first isolation portion is formed to the lower part of the opposite side lateral wall of first isolation portion, the limiting plate forms the striking runway with the cooperation of the casing inner wall of N looks utmost point module lower part, N utmost point static contact can set up and be connected with N utmost point outgoing line terminal along the striking runway, be equipped with the striking piece that a plurality of intervals set up in the middle part of first isolation portion, the clearance that forms between two adjacent striking pieces is as the striking groove, N utmost point moving contact range upon range of setting is in the top of striking groove to N utmost point moving contact can swing in the top of striking groove.

Furthermore, the N-pole contact mechanism also comprises an N-pole contact spring electrically connected with the N-pole moving contact, and a first arc striking plate and an L-pole spring electrically connected with the first arc striking plate are arranged in the L-phase pole module; be equipped with the post of getting electricity in one side of circuit board, the post of getting electricity is used for realizing the N utmost point of circuit board to get with N utmost point contact spring coupling, is equipped with the pad at the opposite side of circuit board, the L utmost point of circuit board is got to pad and L utmost point spring coupling realization circuit board.

Furthermore, the N pole contact spring comprises a first spring and a second spring, one end of the first spring is connected with the power taking column of the circuit board, the other end of the first spring and one end of the second spring are connected with one conductive shaft in the N pole module, and the other end of the second spring is connected with the N pole moving contact.

Further, the driving device is stacked on one side upper portion of the circuit board, and the isolation plate is stacked on the other side lower portion of the circuit board.

The driving device comprises a driving handle, a gear transmission mechanism, a driving structure and a motor, wherein the driving handle is rotatably arranged on the partition plate and is in linkage connection with the handle structure through a handle connecting shaft; when the circuit board driving motor and the gear transmission mechanism carry out brake-separating rotation, the driving structure drives the operating mechanism to act to separate the L-pole contact mechanism and the N-pole contact mechanism.

Further, the driving structure comprises a switching-on driving part, the switching-on driving part is arranged on the gear transmission mechanism and rotates along with the gear transmission mechanism, a handle part is arranged on one side of the driving handle in a protruding mode, when the gear transmission mechanism is switched on and rotates, the switching-on driving part enables the driving handle to be switched on and rotate through matching with the handle part, and the handle structure enables the L-pole contact mechanism and the N-pole contact mechanism to be switched on through enabling the operating mechanism to act.

Further, the drive structure includes separating brake drive division and separating brake rocking arm, separating brake drive division sets up on gear drive and is located towards one side of baffle, separating brake rocking arm rotates and installs on the baffle, and operating device's hasp universal driving shaft passes the baffle and is used for cooperating with separating brake rocking arm in stretching into N looks utmost point module, and when gear drive divides the floodgate to rotate, separating brake drive division drive rotation makes separating brake rocking arm and hasp universal driving shaft cooperation make operating device action realize L utmost point contact mechanism, N utmost point contact mechanism's separating brake.

Further, one side of the opening rocker arm is provided with a reset spring, the reset spring is compressed when the opening rocker arm performs opening rotation, and after the opening rocker arm completes opening rotation, the reset spring provides reset force to enable the opening rocker arm to rotate back to the original position.

According to the compact reclosing circuit breaker, the L-phase pole module and the N-phase pole module are separated through the partition plate, the reclosing module is arranged in the N-phase pole module, the circuit board of the reclosing module is separated from the N-phase contact mechanism through the partition plate, and the reclosing module and the N-phase pole module are combined in the same pole, so that a 1PN circuit breaker with the same volume has a reclosing function, and the volume of the circuit breaker is reduced.

In addition, an arc extinguishing chamber is not arranged in the N-phase pole module, electric arcs generated when the N-pole contact mechanism is switched on and switched off are led out of the shell through an arc striking structure arranged on the isolating plate, the N-pole static contact is arranged in an arc striking runway in the arc striking structure, and the static contact arc striking plate arranged on the N-pole static contact is matched with the static contact arc striking plate, so that an arc extinguishing system of the N-pole contact mechanism is formed, and the size of the circuit breaker is favorably reduced.

In addition, the two sides of the circuit board are respectively provided with an electricity taking column and a welding disc, and the N pole and the L pole of the circuit board are respectively taken by an N pole contact spring and an L pole spring which are arranged on the N phase pole module, so that the welding of a lead is reduced, and the size of the circuit breaker is further reduced.

Drawings

Fig. 1 is a schematic structural diagram of a compact reclosing circuit breaker according to the present invention;

fig. 2 is a schematic diagram of an internal structure of a compact reclosing circuit breaker according to the present invention;

fig. 3 is a schematic diagram of the internal structure of the compact reclosing circuit breaker of the present invention (without the reclosing module and the N-pole contact mechanism);

fig. 4 is a schematic structural diagram of an L-phase pole module in a compact reclosing circuit breaker according to the invention;

fig. 5 is a schematic structural diagram of an N-phase pole module in a compact reclosing circuit breaker according to the present invention;

fig. 6 is a schematic structural diagram of an N-phase pole module in a compact reclosing circuit breaker according to the present invention;

fig. 7 is a schematic diagram of an internal structure of a compact reclosing circuit breaker according to the present invention;

fig. 8 is a schematic diagram of an internal structure of a compact reclosing circuit breaker according to the present invention;

fig. 9 is a schematic structural diagram of a circuit board of the compact reclosing circuit breaker according to the invention.

Detailed Description

The following further describes a specific embodiment of the compact reclosing circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 9. A compact reclosing circuit breaker of the present invention is not limited to the description of the following embodiments.

A compact reclosing circuit breaker, as shown in fig. 1-3, includes a housing 1, preferably, the housing 1 is a housing 1 with a width of 36mm, a partition plate 11 is disposed in the housing 1, the partition plate 11 divides the space in the housing 1 into two chambers, one of the two chambers is provided with an L-phase pole module 2, and the other chamber is provided with an N-phase pole module 3.

The L-phase pole module 2 includes a pair of L-pole incoming line terminal 241 and L-pole outgoing line terminal 242 disposed at two sides of the L-phase pole module 2, a handle structure 21 and an operating mechanism 23 are disposed between the L-pole incoming line terminal 241 and the L-pole outgoing line terminal 242, an L-pole moving contact of an L-pole contact mechanism 22 is connected to the operating mechanism 23, a current transformer 27 is disposed between the L-pole moving contact and the L-pole incoming line terminal 241, a conductor connected between the L-pole moving contact and the L-pole incoming line terminal 241 passes through the current transformer 27, preferably, the conductor connected between the L-pole moving contact and the L-pole incoming line terminal 241 is a flexible connection, the current transformer 27 is connected to a circuit board 41 of the reclosing module 4 for feeding back a current signal of a main line to a controller of the circuit board 41, and an interface 413 (see fig. 3) matched with a lead of the current transformer 27 is preferably disposed on the circuit board 41, the head of the lead mates with interface 413.

An improvement point of L looks utmost point module 2 in this application lies in, use current transformer 27 to replace overload protection device's bimetallic subassembly in current circuit breaker in L looks utmost point module 2, the current signal of main line is gathered through current transformer 27, current transformer 27 transmits the current signal who gathers to the controller of circuit board 41, it makes circuit breaker separating brake through drive reclosing module 4 when the controller of circuit board 41 detects that main line takes place to transship, overload protection device for adopting bimetallic subassembly has more extensive range of application, and need not carry out loaded down with trivial details debugging, and occupy less space inside the circuit breaker

As shown in fig. 2-4 and 9, the L-phase module 2 includes an L-phase module housing, a pair of L-pole connection terminals, an operating mechanism 23, an L-pole contact mechanism 22, a short-circuit protection mechanism 25, an arc-extinguishing chamber 26 and a current transformer 27 are disposed inside the L-phase module housing, the pair of L-pole connection terminals are disposed on two sides of the L-phase module 2 respectively as an L-pole wire-inlet terminal 241 and an L-pole wire-outlet terminal 242, the operating mechanism 23 is disposed on an upper portion inside the L-phase module housing and is located between the L-pole wire-inlet terminal 241 and the L-pole wire-outlet terminal 242, the short-circuit protection mechanism 25 and the arc-extinguishing chamber 26 are disposed on one side of the operating mechanism 23, the arc-extinguishing chamber 26 is located below the short-circuit protection mechanism 25, an L-pole fixed contact in the L-pole contact mechanism 22 disposed on one side of the arc-extinguishing chamber 26 is fixed on one side of the arc-extinguishing chamber 26, an L-pole moving contact in the L-pole contact mechanism 22 is connected to the operating mechanism 23, the L-pole moving contact and the L-pole static contact are arranged oppositely, a current transformer 27 is arranged on the other side of the L-pole moving contact and located on the lower portion of the shell of the L-pole module, a flexible connection connected between the L-pole moving contact and the L-pole wire inlet terminal 241 penetrates through the current transformer 27, the current transformer 27 is connected with a circuit board 41 of the reclosing module 4 through a wire, a first arc striking plate 261 is arranged on one side of the current transformer 27, one end of the first arc striking plate 261 is connected with the L-pole wire inlet terminal 241 through a wire, the other end of the first arc striking plate 261 extends into the arc extinguish chamber 26, meanwhile, the first arc striking plate 261 is connected with a main circuit of the reclosing module 4 for taking electricity from the L pole of the circuit board 41, preferably, a power taking plate 262 is arranged on the first arc striking plate 261, the circuit board 41 realizes the electricity taking from the L pole through a conductive L-pole spring 28 arranged on the L-pole module 2, as shown in fig. 7, one end of the L pole spring 28 passes through the pad of the partition board 11 and the circuit board 41 to be connected, and the other end of the L pole spring 28 is elastically connected to the electricity taking board 262, preferably, the L pole spring 28 is a pressure spring, one side of the circuit board 41 facing the partition board 11 is provided with a pad matched with the L pole spring 28, and the electricity taking board 262 protrudes and is disposed on the side of the first arc striking board 261 close to one side of the partition board 11. An arc discharge channel is arranged on the other side of the arc extinguish chamber 26, which is beneficial to discharge of arc tail gas and prevents the electric arc from flowing back.

The operating mechanism 23 comprises a support, a lever, a jump buckle, a lock catch and a contact support, wherein the support is rotatably arranged in the L-phase pole module shell, the jump buckle and the lock catch are rotatably arranged on the support, the contact support is connected with the support, one end of the lever is connected with the handle structure 21, the other end of the lever is connected with the jump buckle, the jump buckle is connected with an end arm hasp of the lock catch, one end of the contact support is connected with an L-pole moving contact of the L-pole contact mechanism 22, and the L-pole moving contact is arranged opposite to an L-pole static contact fixedly arranged in the L-phase pole module shell; one side of the other end arm of the lock catch is arranged opposite to an electromagnetic trip device in the short-circuit protection mechanism 25, an assembly hole is formed in the lock catch, a lock catch linkage shaft 231 (see fig. 8) is installed in the assembly hole, the lock catch linkage shaft 231 penetrates through the partition plate 11 and extends into the N-phase pole module 3 to be matched with a driving structure of the reclosing module 4, and is specifically matched with a tripping rocker arm 453 in the driving structure to enable the tripping in the operation mechanism 23 and a hasp structure of the lock catch to be unlocked to enable the breaker to be tripped.

The short-circuit protection mechanism 25 comprises an electromagnetic release, the electromagnetic release comprises an electromagnetic coil, one end of the electromagnetic coil is provided with a firing pin, the firing pin is opposite to one end arm of the lock catch, when a main line is short-circuited, the firing pin moves to enable the lock catch to rotate, the lock catch is connected with a buckle of the jump buckle to be unlocked, and the breaker module is switched off.

As shown in fig. 2-3 and 5-9, the N-phase module 3 includes a pair of N-pole connection terminals, an N-pole contact mechanism 32, and a partition plate 33 for installing the N-pole contact mechanism 32, the reclosing module 4 is stacked on the upper portion and one side of the circuit board 41, the N-pole contact mechanism 32 is stacked on the other side of the circuit board 41, and the partition plate 33 is disposed between the N-pole contact mechanism 32 and the circuit board 41, the pair of N-pole connection terminals are respectively disposed on both sides of the N-phase module 3 as an N-pole inlet terminal 311 and an N-pole outlet terminal 312, the N-pole contact mechanism 32 and the partition plate 33 are disposed between the N-pole inlet terminal 311 and the N-pole outlet terminal 312, the partition plate 33 is disposed close to the N-pole inlet terminal 311, the partition plate 33 partitions the N-pole contact mechanism 32 from the circuit board 41 of the reclosing module 4, compared with the existing two-pole structure in which the reclosing module 4 and the N-phase module 3 are spliced into one body, the configuration in which the reclosing module 4 is provided in the N-phase module 3 and the circuit board 41 of the reclosing module 4 and the N-pole contact mechanism 32 are separated only by the partition plate 11 can further reduce the volume of the circuit breaker, but of course, a circuit board 41 provided with a notch corresponding to the partition plate 33 and the N-pole contact mechanism 32 may be used, and the partition plate 33 and the N-pole contact mechanism 32 are not laminated on the circuit board 41. As shown in fig. 5 and 6, the reclosure module 4 is disposed near the upper portion of the handle structure 21, and the N-pole contact mechanism 32 is disposed near the N-pole outlet terminal 312.

As shown in fig. 5, the N-pole contact mechanism 32 includes an N-pole moving contact 321 and an N-pole stationary contact which are matched with each other, the N-pole moving contact 321 is rotatably installed on the upper portion of the isolation plate 33, the N-pole moving contact 321 is connected with the N-pole incoming terminal 311 through a conducting wire, the N-pole stationary contact includes an N-pole stationary contact 322, the N-pole stationary contact 322 is disposed along a space between the bottom side of the circuit board 41 and the inner bottom wall of the housing 1, preferably, the N-pole stationary contact 322 is fixedly disposed along a side wall of the isolation plate 33, one end of the N-pole stationary contact 322 is provided with an N-pole stationary contact 323 which is matched with the N-pole moving contact 321, the N-pole stationary contact 323 is disposed opposite to the N-pole moving contact 321, meanwhile, one end of the N-pole stationary contact 322 which is provided with the N-pole stationary contact 323 is provided with a stationary contact tab 324, the other end of the N-pole stationary contact 322 is connected with the N-pole outgoing terminal 312, preferably, the N-pole module 3 is not provided with the arc extinguishing chamber 26, the arc striking structure corresponding to the N-pole contact mechanism 32 is arranged on the isolation plate 33 and used for leading the arc tail gas out of the shell 1 when the N-pole contact mechanism 32 is switched on and off, so that the reduction of the size of the circuit breaker is facilitated, the arc striking structure and the static contact arc striking plate 324 of the N-pole static contact jointly form an arc extinguishing system of the N-pole contact mechanism 32, the stable discharge of the arc tail gas can be still ensured under the condition that the arc extinguishing chamber 26 is not arranged, and the reduction of the size of the circuit breaker is further facilitated.

The isolation plate 33 includes a first isolation portion 331 for mounting the N-pole contact mechanism 32, preferably, an arc striking structure corresponding to the N-pole contact mechanism 32 is provided on the first isolation portion 331, the arc striking structure includes an arc striking groove 331a and an arc striking runway 331b respectively provided on two sides of the first isolation portion 331, preferably, the arc striking runway 331b is provided in a space between the circuit board 41 and an inner bottom wall of the housing 1, the N-pole moving contact 321 swings above the arc striking groove 331a, and the N-pole stationary contact is provided along the arc striking runway 331b, which further reduces the volume of the circuit breaker.

As shown in fig. 2, 3, 5 and 6, an embodiment of the isolation plate 33 is provided, where the isolation plate 33 includes a first isolation portion 331 and a second isolation portion 332 which are integrally formed, the first isolation portion 331 is in a plate shape, one side of the first isolation portion 331 is connected to the second isolation portion 332, the second isolation portion 332 is provided with a mounting groove for mounting the N-pole wire inlet terminal 311, a lower portion of the other side wall of the first isolation portion 331 is bent away from the first isolation portion 331 to form a limit plate 3312, the limit plate 3312 is located in a space between the circuit board 41 and an inner bottom wall of the housing 1, the limit plate 3312 cooperates with an inner bottom wall of the housing 1 at a lower portion of the N-pole module 3 to form an arc-leading track 331b, the N-pole stationary contact can be disposed along the arc leading track 331b and connected to the N-pole wire outlet terminal 312, of course, the other side wall of the first isolation portion 331 can form a complete arc leading track 331b, in this case, two opposite position-limiting plates 3312 are provided, and a gap between the two position-limiting plates 3312 serves as an arc-starting runway 331b, and the arc-starting runway 331b is preferably connected to the exhaust hole of the case 1. A plurality of arc striking plates 3311 are disposed at intervals in the middle of the first isolation portion 331, a gap formed between two adjacent arc striking plates 3311 serves as an arc striking groove 331a, the N-pole moving contact 321 is stacked above the arc striking groove 331a, and the N-pole moving contact 321 can swing above the arc striking groove 331a, preferably, the number of the arc striking plates 3311 is two, the lower portions of the two arc striking plates 3311 are deflected in the same direction, and the gap between the two arc striking plates 3311 serves as the arc striking groove 331a, as shown in fig. 5 and 6. The N-pole moving contact 321 is rotatably installed on the upper portion of the first isolation portion 331, the N-pole moving contact 321 is connected in a linkage manner with the L-pole moving contact of the L-phase pole module 2 through the isolation plate 33, the circuit board 41 and the partition 11, and the lower portion of the N-pole moving contact 321 can swing on the first partition 11 portion to be matched with the N-pole static contact. An N-pole static contact plate 322 of the N-pole static contact is arranged along the limiting plate 3312, an N-pole static contact 323 is arranged on one side of the N-pole static contact plate 322 extending into the first isolating portion 331, a static contact arc striking plate 324 is further arranged on one side of the N-pole static contact plate 322 extending into the first isolating portion 331, the static contact arc striking plate 324 is located below the N-pole static contact 323, preferably, one end of the static contact arc striking plate 324 is connected to the N-pole static contact plate 322, the other end of the static contact arc striking plate 324 is in the same bending direction as the arc striking plate 3311, the static contact arc striking plate 324 is located on one side of the arc striking plate 3311 and is jointly connected with the arc striking plate 3311, and a space for an arc to flow is reserved between the static contact arc striking plate 324 and the arc striking plate 3311, so that arc gas can be discharged out of the housing 1. When the N-pole contact mechanism 32 opens and closes the first isolation portion 331, the arc is drawn out of the housing 1 by the arc-striking groove 331a and the arc-striking runner 331 b.

The N utmost point contact mechanism 32 still includes electrically conductive N utmost point contact spring, and electrically conductive N utmost point contact spring and the cooperation of L utmost point spring 28 are used, supply circuit board 41 to connect nearby and get the electricity with the N utmost point and the L utmost point that realize circuit board 41, and this kind of mode of getting electricity avoids setting up the wire that makes circuit board 41 get the electricity, can not produce because of the wire fracture causes the potential safety hazard, and simultaneously, this kind of space of getting the electricity mode occupy is less, does benefit to the miniaturized setting of circuit breaker.

An embodiment of a first N-pole contact spring is provided with reference to fig. 5, the N-pole contact spring is used to provide a closing driving force for an N-pole moving contact 321 and to make a circuit board 41 get power from an N pole, the N-pole contact spring includes a first spring 3211 and a second spring 3212, one end of the first spring 3211 is connected to a power-getting post 411 of the circuit board 41, the other end of the first spring 3211 and one end of the second spring 3212 are connected to a conductive shaft in the N-pole module 3, the other end of the second spring 3212 is connected to the N-pole moving contact 321, the second spring 3212 is a tension spring and is disposed on one side of the N-pole moving contact 321 close to an N-pole stationary contact, and the second spring 3212 provides a closing driving force for the N-pole moving contact 321 and at the same time, the circuit board 41 gets power from the N pole. It should be noted that, as an optimal solution in this embodiment, a portion of the circuit board 41 corresponding to the conductive shaft is hollowed to form an avoiding hole, so that the conductive shaft does not directly contact with the circuit board 41, and the conductive shaft needs to be firmly connected to the housing 1, preferably, a conductive shaft mounting hole is disposed on the housing 1, and an elastic force of the second spring 3212 capable of providing a closing driving force for the N-pole moving contact 321 is relatively large, so that the N-pole electricity taking of the circuit board 41 needs to be realized through mutual cooperation of the first spring 3211 and the second spring 3212.

In conjunction with fig. 6, an embodiment of a second N-pole contact spring is provided, where the N-pole contact spring includes a third spring 3213 and a second spring 3212 (the second spring 3212 is not shown in the drawing), one end of the third spring 3213 is inserted into one conductive jack of the circuit board 41, the other end of the third spring 3213 and one end of the second spring 3212 are connected to one conductive shaft in the N-phase pole module 3, the other end of the second spring 3212 is connected to the N-pole moving contact 321, the third spring 3213 is a torsion spring, one torsion spring arm of which is bent and inserted into the conductive jack, compared with the first N-pole contact spring embodiment, the second spring 3212 is a tension spring and is disposed on a side of the N-pole moving contact 321 close to the N-pole moving contact, the second spring 3212 provides a driving force for the N-pole moving contact 321, and at the same time, the circuit board 41 takes power from the N-pole, in this embodiment, there is no need to dispose a power take post 411 on the circuit board 41, the processing of the wiring board 41 is reduced, and at the same time, the third spring 3213 can be ensured to maintain stable electrical connection with the wiring board 41.

As a third embodiment of an N-pole contact spring, the present embodiment is different from the first and second embodiments in that the N-pole contact spring may only include a second spring 3212, one end of the second spring 3212 is connected to the N-pole moving contact 321, the other end of the second spring 3212 is connected to a wire shaft, and the wire shaft is directly connected to the circuit board 41 to supply power to the circuit board 41, but the circuit board 41 is easily damaged by the way that the wire shaft 41 is directly connected to the circuit board 41.

As shown in fig. 2-3 and 5-9, the reclosure module 4 includes a circuit board 41 and a driving device, the driving device includes a driving handle 42, a gear transmission mechanism 43, a driving structure and a motor 44 which are connected in a linkage manner, the circuit board 41 is arranged inside the N-phase pole module 3 and is stacked on the partition plate 11, the circuit board 41 is respectively connected with the L-phase pole module 2 and the N-phase pole module 3 for controlling the power supply of the circuit board 41 to take power, and the circuit board 41 preferably takes power through the N-pole contact spring arranged in the N-phase pole module 3 and the L-pole spring 28 arranged in the L-phase pole module 2. Specifically, as shown in fig. 9, a power taking post 411 is arranged on one side of the circuit board 41, a pad is arranged on the other side of the circuit board 41, the power taking post 411 is located in the N-phase pole module 3, the circuit board 41 is connected with the N-pole moving contact 321 through an N-pole contact spring and used for achieving power taking of the N pole of the circuit board 41, the pad is arranged on one side, facing the L-phase pole module 2, of the circuit board 41, one end of the L-pole spring 28 of the L-phase pole module 2 is connected with the pad, the other end of the L-pole spring is connected with the first arc striking plate 261 of the L-phase pole module 2, power taking of the L pole of the circuit board 41 is achieved, and the power taking mode of the circuit board 41 avoids power taking through a welding wire, so that the machining process is simplified, the space size of a pole circuit breaker is saved, and the size of the circuit breaker is further reduced. Of course, the power-taking post 411 may not be provided on the circuit board 41, and one end of the N-pole contact spring connected to the circuit board 41 may be directly inserted into one of the insertion holes of the circuit board 41.

As shown in fig. 5-7, the driving handle 42, the gear transmission mechanism 43 and the motor 44 are stacked on the surface of the circuit board 41, the driving handle 42 is rotatably installed on the upper portion of the N-phase pole module 3 and is linked with the handle structure 21 of the L-phase pole module 2 through a handle linkage shaft, the driving handle 42 and the gear transmission mechanism 43 are driven to rotate by the closing driving member 451 of the driving structure, the gear transmission mechanism 43 is in transmission connection with the motor 44, the motor 44 is driven to rotate after the controller of the circuit board 41 receives a closing action signal, and the operating mechanism 23 drives the L-pole contact mechanism 22 and the N-pole contact mechanism 32 to close under the mutual cooperation of the gear transmission mechanism 43, the closing driving member 451 and the driving handle 42, so as to realize the automatic closing of the circuit breaker.

As shown in fig. 7, the driving structure further includes a brake separating driving portion 452 and a brake separating rocker arm 453, the brake separating driving portion 452 is disposed on the gear transmission mechanism 43, preferably, on a side of the gear transmission mechanism 43 close to the partition 11, the brake separating rocker arm 453 is rotatably disposed on the partition 11, the driving motor 44 is driven to rotate after the controller of the circuit board 41 receives a brake separating operation signal, the brake separating driving portion 452 cooperates with the brake separating rocker arm 453 to rotate the brake separating rocker arm 453 along with the rotation of the gear transmission mechanism 43, the rotation of the brake separating rocker arm 453 enables the latch linkage shaft 231 to drive the operating mechanism 23 of the L-phase pole module 2 to operate, and after the latch of the operating mechanism 23 is unlocked from the latched structure of the trip, the L-pole contact mechanism 22 and the N-pole contact mechanism 32 are separated to realize automatic brake separation of the circuit breaker.

As shown in fig. 2, 3, 5-7, the gear transmission mechanism 43 includes four first gears 431, second gears 432, third gears 433, and fourth gears 434 engaged in sequence, where the first gear 431 is engaged with the motor 44 through a worm, the motor 44 is disposed on one side of the N-phase pole module 3, and is located on the left side of the N-phase pole module 3 in the drawing, a closing driving member 451 is disposed on one side of the fourth gear 434 away from the circuit board 41, preferably, a mounting hole is disposed on the fourth gear 434, one end of the closing driving member 451 is installed in the mounting hole as a connecting end, and the other end of the closing driving member 451 is engaged with the driving handle 42 as a driving end; a switching-off driving part 452 is arranged on one side of the fourth gear 434 facing the circuit board 41, and the switching-off driving part 452 is a protruding structure arranged on the fourth gear 434; the opening rocker arm 453 is rotatably mounted on the partition plate 11, the opening rocker arm 453 comprises a short arm 4531 and a long arm 4532, the short arm 4531 is used for being matched with the opening driving portion 452 to enable the opening rocker arm 453 to rotate, the long arm 4532 is used for being matched with the locking linkage shaft 231 to enable the operating mechanism 23 of the L-phase pole module 2 to act, preferably, an included angle between the long arm 4532 and the short arm 4531 ranges from 90 degrees to 180 degrees, preferably, a reset spring 454 is arranged on one side of the opening rocker arm 453, the reset spring 454 is compressed when the opening rocker arm 453 performs opening rotation, and after the opening rocker arm 453 completes opening rotation, the reset spring 454 provides reset force to enable the opening rocker arm 453 to rotate back to the original position. Of course, the number of corresponding gears may be increased or decreased as needed, for example, only 2 or 3 gears, or 5 gears may be provided.

An embodiment of the driving handle 42 and the gear transmission mechanism 43 is provided in conjunction with fig. 2, 3 and 5-7, wherein the driving handle 42 has a protruding handle portion 421, a track groove 111 for matching with the driving end of the closing driving member 451 is formed on the partition 11 below the driving handle 42, and the driving end of the closing driving member 451 slides along the track groove 111 as the fourth gear 434 performs the opening and closing rotation, and the driving end rotates the driving handle 42 by pushing the handle portion 421; when the motor 44 drives the gear transmission mechanism 43 to perform closing rotation, the rotation direction of the fourth gear 434 in fig. 5 and 6 is counterclockwise, at this time, the driving end of the closing driving member 451 slides from the inner end of the track groove 111 to the outer end of the track groove 111, the closing rotation of the driving handle 42 is realized by pushing the handle portion 421 after the driving end contacts with the handle portion 421, the closing rotation direction of the driving handle 42 is clockwise, and at this time, the opening driving portion 452 is not matched with the opening rocker arm 453; when the motor 44 drives the gear transmission mechanism 43 to perform opening rotation, the rotation direction of the fourth gear 434 in fig. 5 and 6 is clockwise, at this time, the opening driving portion 452 of the fourth gear 434 rotates and cooperates with the short arm 4531 of the opening rocker 453 to rotate the opening rocker 453, the long arm 4532 of the opening rocker 453 cooperates with the latch linkage shaft 231 of the operating mechanism 23 to unlock the latch and the trip of the operating mechanism 23, the operating mechanism 23 enables the L-pole contact mechanism 22 and the N-pole contact mechanism 32 to perform opening, the driving end of the closing driving member 451 slides from the outer end of the track slot 111 to the inner end of the track slot 111, and the handle portion 421 performs counterclockwise opening rotation after the driving end is removed from pushing action. The circuit board 41 is provided with an escape groove 412 through which the opening driving portion 452 of the fourth gear 434 moves, and the partition plate 11 is provided with a plurality of through holes for linking the L-phase pole module 2 with the reclosing module 4 and the N-phase pole module 3.

Referring to fig. 8, a track groove 111 is formed in the upper portion of the partition plate 11, a linkage hole 112 is formed in the middle portion of the partition plate 11, through which the latch linkage shaft 231 passes, and the linkage hole 112 is preferably a kidney-shaped hole, through which the latch linkage shaft 231 passes and is capable of moving in the linkage hole 112, and an opening rocker 453 and a return spring 454 are preferably rotatably installed in a space between the linkage hole 112 and the track groove 111, as shown in fig. 8, the return spring 454 is located on the upper portion of the opening rocker 453, a short arm 4531 of the opening rocker 453 is configured to cooperate with one elastic arm of the return spring 454, when the opening rocker 453 rotates, the return spring 454 is compressed, and after the opening rotation is completed, the return spring 454 provides a return force. The lower part of the partition board 11 is provided with a threading hole 113, the threading hole 113 is used for a lead of the current transformer 27 to pass through, the lead of the current transformer 27 passes through the threading hole 113 to be connected with the circuit board 4, the lead is used for feeding back a current signal of a main circuit to a controller of the circuit board 41, and the partition board 11 is also provided with a hole for the L-pole spring 28 to pass through.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (11)

1. The utility model provides a compact reclosing circuit breaker, includes casing (1) and sets up at the inside L looks utmost point module (2) of casing (1), N looks utmost point module (3), L looks utmost point module (2) and N looks utmost point module (3) separate its characterized in that through baffle (11):

the L-phase pole module (2) comprises a handle structure (21), an operating mechanism (23) and an L-pole contact mechanism (22), the N-phase pole module (3) comprises a reclosing module (4) and an N-pole contact mechanism (32), the reclosing module (4) comprises a circuit board (41) and a driving device connected with the circuit board (41), the circuit board (41) is arranged on one side of the partition board (11), the driving device is stacked on the circuit board (41) and is respectively connected with the handle structure (21) and the operating mechanism (23) in a linkage manner, the N-pole contact mechanism (32) is stacked on the circuit board (41), an isolation board (33) is arranged between the N-pole contact mechanism (32) and the circuit board (41), an N-pole movable contact (321) of the N-pole contact mechanism (32) penetrates through the isolation board (33), the circuit board (41) and the partition board (11) to be connected with the L-pole movable contact of the L-pole contact mechanism (22) in a linkage manner, the reclosing module (4) drives the L-phase pole module (2) to act so as to enable the circuit breaker to be automatically switched on and off.

2. The compact reclosing circuit breaker of claim 1, further comprising: the N-phase pole module (3) further comprises an N-pole incoming line terminal (311) and an N-pole outgoing line terminal (312), the N-pole contact mechanism (32) comprises an N-pole moving contact (321) and an N-pole static contact which are matched with each other, the N-pole moving contact (321) is rotatably installed on the upper portion of the isolation plate (33), the N-pole moving contact (321) is connected with the N-pole incoming line terminal (311) through a lead, the N-pole static contact comprises an N-pole static contact plate (322), the N-pole static contact plate (322) is fixedly arranged along the side wall of one side of the isolation plate (33), one end of the N-pole static contact plate (322) is provided with an N-pole static contact (323) matched with the N-pole moving contact (321), the N-pole static contact (323) is opposite to the N-pole moving contact (321), an arc guide piece (324) is arranged at one end of the N-pole static contact plate (322) provided with the N-pole static contact (323), and the other end of the N-pole static contact plate (322) is connected with the N-pole outgoing line terminal (312), an arc striking structure corresponding to the N-pole contact mechanism (32) is arranged on the isolation plate (33).

3. The compact reclosing circuit breaker according to claim 1 or 2, characterized in that: the isolating plate (33) comprises a first isolating part (331) used for installing the N-pole contact mechanism (32), an arc striking structure corresponding to the N-pole contact mechanism (32) is arranged on the first isolating part (331), the arc striking structure comprises an arc striking groove (331a) and an arc striking runway (331b) which are respectively arranged on the first isolating part (331), the N-pole moving contact (321) swings above the arc striking groove (331a), and the N-pole fixed contact is arranged along the arc striking runway (331 b).

4. The compact reclosing circuit breaker of claim 3, wherein: the isolating plate (33) comprises a first isolating part (331) and a second isolating part (332) which are integrally formed, the first isolating part (331) is plate-shaped, one side of the first isolating part (331) is connected with the second isolating part (332), the second isolating part (332) is provided with a mounting groove for mounting the N-pole wire inlet terminal (311), the lower part of the side wall of the other side of the first isolating part (331) is bent towards the direction far away from the first isolating part (331) to form a limiting plate (3312), the limiting plate (3312) is matched with the inner wall of the shell (1) at the lower part of the N-phase pole module (3) to form an arc-leading runway (331b), the N-pole static contact can be arranged along the arc-leading runway (331b) and is connected with the N-pole wire outlet terminal (312), a plurality of arc-leading sheets (3311) arranged at intervals are arranged in the middle part of the first isolating part (331), and a gap formed between two adjacent arc-leading sheets (3311) is used as an arc-leading groove (331a), the N-pole moving contact (321) is arranged above the arc striking groove (331a) in a laminated mode, and the N-pole moving contact (321) can swing above the arc striking groove (331 a).

5. The compact reclosing circuit breaker of claim 1, further comprising: the N-pole contact mechanism (32) further comprises an N-pole contact spring electrically connected with the N-pole moving contact (321), and a first arc ignition plate (261) and an L-pole spring (28) electrically connected with the first arc ignition plate (261) are arranged in the L-phase pole module (2); be equipped with the post of getting electricity (411) in one side of circuit board (41), the post of getting electricity (411) is connected with N utmost point contact spring and is used for realizing the N utmost point of circuit board (41) and gets the electricity, is equipped with the pad at the opposite side of circuit board (41), the pad is connected with L utmost point spring (28) and is realized the L utmost point of circuit board (41) and get the electricity.

6. The compact reclosing circuit breaker of claim 5, wherein: the N-pole contact spring comprises a first spring (3211) and a second spring (3212), one end of the first spring (3211) is connected with a power taking column (411) of the circuit board (41), the other end of the first spring (3211) and one end of the second spring (3212) are connected with a conductive shaft in the N-pole module (3), and the other end of the second spring (3212) is connected with the N-pole moving contact (321).

7. The compact reclosing circuit breaker of claim 1, further comprising: the driving device is stacked on one side upper part of the circuit board (41), and the isolation plate (33) is stacked on the other side lower part of the circuit board (41).

8. The compact reclosing circuit breaker of claim 1, further comprising: the driving device comprises a driving handle (42), a gear transmission mechanism (43), a driving structure and a motor (44), wherein the driving handle (42) is rotatably installed on the partition plate (11), the driving handle (42) is in linkage connection with the handle structure (21) through a handle connecting shaft, the gear transmission mechanism (43) is arranged on the lower portion of the driving handle (42), the motor (44) is arranged on one side of the N-phase pole module (3) and is meshed with the gear transmission mechanism (43), the driving structure arranged in the N-phase pole module (3) is respectively matched with the driving handle (42) and the operating mechanism (23) along with the rotation of the gear transmission mechanism (43), and when the driving motor (44) and the gear transmission mechanism (43) of the circuit board (41) perform switching-on rotation, the driving structure enables the driving handle (42) to drive the switching-on handle structure (21) to rotate and enables the L-pole contact mechanism (22) to be connected with the operating mechanism (23), The N pole contact mechanism (32) is switched on; when the circuit board (41) drives the motor (44) and the gear transmission mechanism (43) to perform opening rotation, the driving mechanism drives the operating mechanism (23) to act to open the L-pole contact mechanism (22) and the N-pole contact mechanism (32).

9. The compact reclosing circuit breaker of claim 8, wherein: the driving structure comprises a closing driving part (451), the closing driving part (451) is arranged on the gear transmission mechanism (43) and rotates along with the gear transmission mechanism (43), a handle part (421) is arranged on one side of the driving handle (42) in a protruding mode, when the gear transmission mechanism (43) is closed and rotates, the closing driving part (451) enables the driving handle (42) to be closed and rotated through matching with the handle part (421), and the handle structure (21) enables the L-pole contact mechanism (22) and the N-pole contact mechanism (32) to be closed through enabling the operating mechanism (23) to act.

10. The compact reclosing circuit breaker of claim 8, wherein: the driving structure comprises a brake separating driving part (452) and a brake separating rocker arm (453), the brake separating driving part (452) is arranged on the gear transmission mechanism (43) and located on one side facing the partition plate (11), the brake separating rocker arm (453) is rotatably installed on the partition plate (11), a lock catch linkage shaft (231) of the operating mechanism (23) penetrates through the partition plate (11) and extends into the N-phase pole module (3) to be matched with the brake separating rocker arm (453), and when the gear transmission mechanism (43) is in brake separating rotation, the brake separating driving part (452) drives the brake separating rocker arm (453) to rotate and enables the brake separating rocker arm (453) to be matched with the lock catch linkage shaft (231) to enable the operating mechanism (23) to act to realize the brake separation of the L-pole contact mechanism (22) and the N-pole contact mechanism (32).

11. The compact reclosing circuit breaker of claim 10, wherein: and a return spring (454) is arranged on one side of the opening rocker arm (453), the return spring (454) is compressed when the opening rocker arm (453) performs opening rotation, and after the opening rocker arm (453) completes opening rotation, the return spring (454) provides a return force to enable the opening rocker arm (453) to rotate back to the original position.

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