A compact reclosing circuit breaker

Abstract

A compact reclosing circuit breaker includes an L-phase pole module and an N-phase pole module arranged in parallel, the L-phase pole module includes an L-pole incoming terminal, a first arc-starting plate and an L-pole spring, and the L-pole incoming terminal and the L-pole spring are electrically connected through the first arc-starting plate; the N-phase pole module includes an N-pole incoming terminal and an N-pole outgoing terminal respectively arranged on both sides of the N-phase pole module, a circuit board of the reclosing module and an N-pole contact mechanism stacked on the circuit board are arranged between the N-pole incoming terminal and the N-pole outgoing terminal, the N-pole contact mechanism includes an N-pole moving contact and an N-pole contact spring connected to the N-pole moving contact, and the circuit board is respectively connected to the N-pole contact spring and the L-pole spring to realize N-pole power supply and L-pole power supply of the circuit board. The circuit board of the present invention does not have a wire for power supply, so there will be no safety hazard caused by wire breakage, and it occupies less space, which is conducive to the miniaturization of the circuit breaker.

Description

Technical Field

[0001] The invention relates to a circuit breaker, in particular to a compact reclosing circuit breaker. Background Art

[0002] Circuit breakers can be used to infrequently open and close distribution lines, and provide overload and short-circuit protection for distribution lines and equipment. They can automatically cut off the circuit when a serious overload or short-circuit occurs in the distribution lines or equipment. Existing circuit breakers usually have an automatic reclosing function, that is, after the circuit breaker is put into normal operation and trips due to an external line fault, it will automatically reclose again after a short delay to improve power supply reliability.

[0003] At present, most of the 1PN reclosing circuit breakers on the market are assembled from a 36mm wide 1PN circuit breaker and an 18mm wide motor drive module. With the transformation and upgrading of the national power grid and the application of markets such as smart buildings, this assembly structure is gradually unable to meet the requirements of intelligent and miniaturized circuit breakers. The existing reclosing circuit breaker also has a defect. The power supply of its circuit board is achieved by connecting the wires to the incoming terminals in the two-pole module. Due to the compact internal structure of the circuit breaker, the space is small, the maintenance is difficult, and the wires are easily broken under the extrusion or friction of adjacent components, causing safety hazards. Summary of the invention

[0004] The object of the present invention is to overcome the defects of the prior art and provide a compact reclosing circuit breaker with small size and high reliability.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A compact reclosing circuit breaker comprises an L-phase pole module and an N-phase pole module arranged in parallel, the L-phase pole module comprising an L-pole incoming terminal, a first arc-starting plate and an L-pole spring, the L-pole incoming terminal and the L-pole spring being electrically connected via the first arc-starting plate; the N-phase pole module comprises an N-pole incoming terminal and an N-pole outgoing terminal respectively arranged on both sides of the N-phase pole module, a circuit board of the reclosing module and an N-pole contact mechanism stacked on the circuit board are arranged between the N-pole incoming terminal and the N-pole outgoing terminal, the N-pole contact mechanism comprises an N-pole moving contact and an N-pole contact spring connected to the N-pole moving contact, the circuit board is respectively connected to the N-pole contact spring and the L-pole spring for realizing N-pole power supply and L-pole power supply of the circuit board.

[0007] Furthermore, the N-pole contact spring includes a first spring and a second spring, one end of the first spring is connected to the power supply post of the circuit board, the other end of the first spring and one end of the second spring are connected to a conductive shaft in the N-phase pole module, and the other end of the second spring is connected to the N-pole moving contact.

[0008] Furthermore, the N-pole contact spring includes a third spring and a second spring, one end of the third spring is inserted into a conductive socket of the circuit board, the other end of the third spring and one end of the second spring are connected to a conductive shaft in the N-phase pole module, and the other end of the second spring is connected to the N-pole moving contact.

[0009] Furthermore, the N-pole contact spring only includes a second spring, one end of the second spring is connected to the N-pole moving contact, and the other end of the second spring is connected to a conductive shaft in the N-pole module, and the conductive shaft is connected to the circuit board.

[0010] Furthermore, a power extraction board is provided on the first arc-starting board, a partition is provided between the L-phase pole module and the N-phase pole module, one end of the L-pole spring passes through the partition and is connected to the circuit board, and the other end of the L-pole spring is connected to the power extraction board.

[0011] Furthermore, the L-pole spring is a compression spring, a welding pad cooperating with the L-pole spring is provided on the side of the circuit board facing the partition, and the power taking plate is protrudingly arranged on the side of the first arc starting plate close to the partition.

[0012] Furthermore, a driving device for the reclosing module is also provided in the N-phase pole module, and the driving device is connected to the circuit board. The driving device includes a driving handle, a gear transmission mechanism, a driving structure and a motor that are linked together. After the controller of the circuit board receives an action signal, the motor and the gear transmission mechanism are activated, and the L-phase pole module and the N-phase pole module are automatically opened and closed through the action of the driving structure.

[0013] Further, the L-phase pole module includes a handle structure, an operating mechanism, and an L-pole contact mechanism linked to the N-pole contact mechanism. The drive handle is linked to the handle structure. The drive structure includes a closing drive member, an opening drive portion arranged on the gear transmission mechanism, and a rotatably mounted opening rocker arm.

[0014] After the controller of the circuit board receives the closing action signal, the motor is driven to rotate, and the operating mechanism drives the L-pole contact mechanism and the N-pole contact mechanism to close under the cooperation of the gear transmission mechanism, the closing drive member and the driving handle, so as to realize the automatic closing of the circuit breaker;

[0015] After the controller of the circuit board receives the opening action signal, it drives the motor and the gear transmission mechanism to rotate. As the gear transmission mechanism rotates, the opening drive unit cooperates with the opening rocker arm to rotate the opening rocker arm. The opening rocker arm drives the operating mechanism of the L-phase pole module to operate and open the L-pole contact mechanism and the N-pole contact mechanism, thereby realizing automatic opening of the circuit breaker.

[0016] Furthermore, the operating mechanism includes a support, a lever, a tripper, a lock and a contact support. The support is rotatably installed in the L-phase pole module, the tripper and the lock are rotatably installed on the support, the contact support is connected to the support, one end of the lever is connected to the handle structure, and the other end is connected to the tripper, the tripper is snap-connected with one end arm of the lock, one end of the contact support is connected to the L-pole moving contact, an assembly hole is provided on the lock, and a lock linkage shaft is installed in the assembly hole, the lock linkage shaft extends into the N-phase pole module and cooperates with the opening rocker arm in the drive structure, so as to unlock the snap structure of the tripper and the lock in the operating mechanism to open the circuit breaker.

[0017] Further, the N-pole contact mechanism includes an N-pole static contact, and the N-pole static contact includes an N-pole static contact plate, one end of the N-pole static contact plate is provided with an N-pole static contact that cooperates with the N-pole moving contact, and the N-pole static contact is arranged opposite to the N-pole moving contact, the N-pole moving contact is linked to the L-pole moving contact of the L-phase pole module, and a static contact arc-starting piece is provided at one end of the N-pole static contact plate where the N-pole static contact is provided, and the other end of the N-pole static touch plate is connected to the N-pole output terminal.

[0018] Furthermore, a partition is provided between the L-phase pole module and the N-phase pole module, a track groove is provided on the upper portion of the partition, and a linkage hole is provided in the middle portion of the partition.

[0019] Furthermore, the conductive shaft is mounted on the housing of the circuit breaker, a conductive shaft mounting hole is provided on the housing, and a portion of the circuit board corresponding to the conductive shaft is hollowed out and provided with an avoidance hole.

[0020] Compared with the existing method of connecting the circuit board to the incoming terminals in the two-pole module through wires to obtain power, a compact reclosing circuit breaker of the present invention is provided with a circuit board of the reclosing module in the N-phase pole module, and the circuit board is connected to the first arc-starting plate and the N-pole moving contact through the L-pole spring and the N-pole contact spring respectively, so that the L-pole and N-pole power of the circuit board are obtained by taking power nearby, and at the same time, the setting of power-taking wires for the circuit board is avoided, and there will be no safety hazards caused by wire breakage. At the same time, this power-taking method occupies less space, which is conducive to the miniaturization of the circuit breaker.

[0021] In addition, a driving device of the reclosing module is also provided in the N-phase pole module. The driving device and the N-pole contact mechanism are arranged in the same pole. The N-pole moving contact is linked with the L-pole moving contact. The driving device can operate the L-pole moving contact and the N-pole moving contact by driving the L-pole moving contact to operate, so that a 1PN circuit breaker of the same volume has a reclosing function, thereby reducing the volume of the circuit breaker.

[0022] In addition, an isolation plate is provided between the N-pole contact mechanism and the circuit board, an arc-striking groove is provided on the isolation plate, and together with the static contact arc-striking plate provided for the N-pole static contact, an arc extinguishing system for the N-pole contact mechanism is formed, and an arc extinguishing chamber is not required, thereby further reducing the size of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a compact reclosing circuit breaker of the present invention;

[0024] Figure 2 It is a schematic diagram of the internal structure of a compact reclosing circuit breaker of the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of a compact reclosing circuit breaker of the present invention (excluding the reclosing module and the N-pole contact mechanism);

[0026] Figure 4 It is a structural schematic diagram of an L-phase pole module in a compact reclosing circuit breaker of the present invention;

[0027] Figure 5 It is a structural schematic diagram of an N-phase pole module in a compact reclosing circuit breaker of the present invention;

[0028] Figure 6 It is a structural schematic diagram of an N-phase pole module in a compact reclosing circuit breaker of the present invention;

[0029] Figure 7 It is a schematic diagram of the internal structure of a compact reclosing circuit breaker of the present invention;

[0030] Figure 8 It is a schematic diagram of the internal structure of a compact reclosing circuit breaker of the present invention;

[0031] Fig. 9 The present invention is a schematic diagram of the circuit board structure of a compact reclosing circuit breaker. DETAILED DESCRIPTION

[0032] The following is combined with Figures 1 to 9 The given embodiments further illustrate the specific implementation of a compact reclosing circuit breaker of the present invention. The compact reclosing circuit breaker of the present invention is not limited to the description of the following embodiments.

[0033] A compact reclosing circuit breaker, such as Figure 1-3 As shown, it includes a shell 1, preferably the shell 1 is a shell 1 with a width of 36 mm, and a partition 11 is arranged in the shell 1, and the partition 11 divides the space in the shell 1 into two chambers, wherein an L-phase pole module 2 is installed in one chamber, and an N-phase pole module 3 is installed in the other chamber.

[0034] The L-phase pole module 2 includes a pair of L-pole incoming terminal 241 and L-pole outgoing terminal 242 arranged on both sides of the L-phase pole module 2, a handle structure 21 and an operating mechanism 23 are arranged between the L-pole incoming terminal 241 and the L-pole outgoing terminal 242, an L-pole moving contact of the L-pole contact mechanism 22 is connected to the operating mechanism 23, a current transformer 27 is arranged between the L-pole moving contact and the L-pole incoming terminal 241, a conductor connected between the L-pole moving contact and the L-pole incoming terminal 241 passes through the current transformer 27, preferably, the conductor connected between the L-pole moving contact and the L-pole incoming terminal 241 is a soft connection, the current transformer 27 is connected to the circuit board 41 of the reclosing module 4, and is used to feed back the current signal of the main line to the controller of the circuit board 41, and preferably, an interface 413 (see Figure 3 ), the head of the wire matches with the interface 413.

[0035] An improvement of the L-phase pole module 2 in the present application is that a current transformer 27 is used in the L-phase pole module 2 to replace the bimetallic component of the overload protection device in the existing circuit breaker, and the current signal of the main line is collected by the current transformer 27, and the current transformer 27 transmits the collected current signal to the controller of the circuit board 41. When the controller of the circuit board 41 detects that the main line is overloaded, the circuit breaker is opened by driving the reclosing module 4. Compared with the overload protection device using the bimetallic component, it has a wider range of applications, does not require cumbersome debugging, and occupies a smaller space inside the circuit breaker.

[0036] Specific as Figure 2-4As shown in Figure 9, the L-phase pole module 2 includes an L-phase pole module housing, and a pair of L-pole 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 arranged inside the L-phase pole module housing. A pair of L-pole terminals are respectively arranged on both sides of the L-phase pole module 2 as an L-pole incoming terminal 241 and an L-pole outgoing terminal 242, respectively. The operating mechanism 23 is arranged at the upper part of the L-phase pole module housing and is located between the L-pole incoming terminal 241 and the L-pole outgoing terminal 242. The short-circuit protection mechanism 25 and the arc extinguishing chamber 26 are arranged on one side of the operating mechanism 23, and the arc extinguishing chamber 26 is located below the short-circuit protection mechanism 25. The L-pole static contact in the L-pole contact mechanism 22 arranged on one side of the arc extinguishing chamber 26 is fixed on one side of the arc extinguishing chamber 26, and the L-pole moving contact in the L-pole contact mechanism 22 is connected to the L-pole moving contact. It is connected to the operating mechanism 23, and the L-pole moving contact and the L-pole static contact are arranged opposite to each other. The current transformer 27 is arranged on the other side of the L-pole moving contact and is located at the lower part of the L-phase pole module housing. The soft connection between the L-pole moving contact and the L-pole incoming terminal 241 passes through the current transformer 27. The current transformer 27 is connected to the circuit board 41 of the reclosing module 4 through a wire. A first arc-starting plate 261 is arranged on one side of the current transformer 27. One end of the first arc-starting plate 261 is connected to the L-pole incoming terminal 241 through a wire, and the other end of the first arc-starting plate 261 extends into the arc extinguishing chamber 26. At the same time, the first arc-starting plate 261 is connected to the main circuit of the reclosing module 4 for L-pole power supply of the circuit board 41. Preferably, a power supply plate 262 is provided on the first arc-starting plate 261. The circuit board 41 realizes L-pole power supply through a conductive L-pole spring 28 arranged in the L-phase pole module 2. Figure 7 As shown, one end of the L-pole spring 28 passes through the partition 11 and is connected to the pad of the circuit board 41, and the other end of the L-pole spring 28 is elastically connected to the power-taking board 262. Preferably, the L-pole spring 28 is a compression spring, and the side of the circuit board 41 facing the partition 11 is provided with a pad that matches the L-pole spring 28, and the power-taking board 262 is protrudingly arranged on the side of the first arc-starting board 261 close to the partition 11. An arc discharge channel is provided on the other side of the arc extinguishing chamber 26 to facilitate the discharge of arc tail gas and prevent arc backflow.

[0037] The operating mechanism 23 includes a support, a lever, a trip button, a lock button and a contact support. The support is rotatably installed in the L-phase pole module housing, the trip button and the lock button are rotatably installed on the support, the contact support is connected to the support, one end of the lever is connected to the handle structure 21, and the other end is connected to the trip button. The trip button is snap-connected with one end arm of the lock button. One end of the contact support is connected to the L-pole moving contact of the L-pole contact mechanism 22, and the L-pole moving contact is arranged opposite to the L-pole static contact fixedly arranged in the L-phase pole module housing; one side of the other end arm of the lock button is arranged opposite to the electromagnetic release in the short-circuit protection mechanism 25, and an assembly hole is provided on the lock button, and a lock button linkage shaft 231 (see Figure 8 ), the lock linkage shaft 231 passes through the partition 11 and extends into the N-phase pole module 3 to cooperate with the driving structure of the reclosing module 4, specifically with the opening rocker arm 453 in the driving structure, to unlock the latch structure of the trip latch and the lock latch in the operating mechanism 23 to open the circuit breaker.

[0038] The short-circuit protection mechanism 25 includes an electromagnetic release, which includes an electromagnetic coil. A striker is provided at one end of the electromagnetic coil. The striker is opposite to an end arm of a lock. When a short circuit occurs in the main line, the movement of the striker causes the lock to rotate, and the buckle connection between the lock and the tripping buckle is unlocked, and the circuit breaker module is opened.

[0039] like Figure 2-3 As shown in Figures 5-9, the N-phase pole module 3 includes a pair of N-pole wiring terminals, an N-pole contact mechanism 32, and an isolation plate 33 for installing the N-pole contact mechanism 32. The reclosing module 4 is stacked on the upper part and one side of the circuit board 41, and the N-pole contact mechanism 32 is stacked on the lower part of the other side of the circuit board 41, and an isolation plate 33 is arranged between the N-pole contact mechanism 32 and the circuit board 41. A pair of N-pole wiring terminals are respectively arranged on both sides of the N-phase pole module 3 as the N-pole incoming terminal 311 and the N-pole outgoing terminal 312, and the N-pole contact mechanism 32 and the isolation plate 33 are arranged between the N-pole incoming terminal 311 and the N-pole outgoing terminal 312. The isolation plate 33 is arranged near the N-pole incoming terminal 311, and the isolation plate 33 separates 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 pole module 3 are spliced ​​into one, the reclosing module 4 is arranged in the N-phase pole 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 11, which can further reduce the volume of the circuit breaker. Of course, a circuit board 41 with a notch can also be used, and the notch of the circuit board 41 corresponds to the isolation plate 33 and the N-pole contact mechanism 32, and the isolation plate 33 and the N-pole contact mechanism 32 are not stacked on the circuit board 41. Figure 5 , 6As shown, the reclosing module 4 is arranged at the upper part close to the handle structure 21, and the N-pole contact mechanism 32 is arranged at the lower part close to the N-pole outlet terminal 312.

[0040] like Figure 5 As shown, the N-pole contact mechanism 32 includes an N-pole moving contact 321 and an N-pole static contact that cooperate with each other. The N-pole moving contact 321 is rotatably installed on the upper part of the isolation plate 33. The N-pole moving contact 321 is connected to the N-pole incoming line terminal 311 through a wire. The N-pole static contact includes an N-pole static contact plate 322. The N-pole static contact plate 322 is arranged along the space between the bottom side of the circuit board 41 and the inner bottom wall of the shell 1. Preferably, the N-pole static contact plate 322 is fixedly arranged along one side wall of the isolation plate 33. One end of the N-pole static contact plate 322 is provided with an N-pole static contact 323 that cooperates with the N-pole moving contact 321, and the N-pole static contact 323 is arranged opposite to the N-pole moving contact 321. At the same time, The static contact plate 322 is provided with an N-pole static contact 323, one end of which is provided with a static contact arc-starting plate 324, and the other end of the N-pole static contact plate 322 is connected to the N-pole output terminal 312. Preferably, the arc extinguishing chamber 26 is not arranged in the N-phase pole module 3. By arranging an arc-starting structure corresponding to the N-pole contact mechanism 32 on the isolation plate 33, the arc exhaust gas is led out of the shell 1 when the N-pole contact mechanism 32 is opened and closed, which is beneficial to reducing the volume of the circuit breaker. The arc-starting structure and the static contact arc-starting plate 324 of the N-pole static contact together constitute the arc extinguishing system of the N-pole contact mechanism 32, which can still ensure the stable discharge of the arc exhaust gas without arranging the arc extinguishing chamber 26, further beneficial to reducing the volume of the circuit breaker.

[0041] The isolation plate 33 includes a first isolation portion 331 for installing the N-pole contact mechanism 32. Preferably, an arc-striking structure corresponding to the N-pole contact mechanism 32 is provided in the first isolation portion 331. The arc-striking structure includes an arc-striking groove 331a and an arc-striking track 331b respectively arranged on both sides of the first isolation portion 331. Preferably, the arc-striking track 331b is arranged in the space between the circuit board 41 and the inner bottom wall of the shell 1. The N-pole moving contact 321 swings above the arc-striking groove 331a, and the N-pole static contact is arranged along the arc-striking track 331b, which further reduces the volume of the circuit breaker.

[0042] like Figure 2 , 3, 5 and 6, an embodiment of an isolation plate 33 is provided, wherein the isolation plate 33 includes an integrally formed first isolation portion 331 and a second isolation portion 332, wherein the first isolation portion 331 is in the shape of a plate, one side of the first isolation portion 331 is connected to the second isolation portion 332, the second isolation portion 332 is provided with an installation groove for installing the N-pole incoming terminal 311, and the lower part of the side wall on the other side of the first isolation portion 331 is bent in a direction away from the first isolation portion 331 to form a limiting plate 3312, wherein the limiting plate 3312 is located between the circuit board 41 and the shell In the space between the inner bottom walls of the body 1, the limiting plate 3312 cooperates with the inner bottom wall of the shell 1 at the lower part of the N-phase pole module 3 to form an arc-striking track 331b. The N-pole static contact can be arranged along the arc-striking track 331b and connected to the N-pole output terminal 312. Of course, a complete arc-striking track 331b can also be formed by the side wall on the other side of the first isolating portion 331. In this case, there are two relatively arranged limiting plates 3312, and the gap between the two limiting plates 3312 serves as the arc-striking track 331b. The arc-striking track 331b is preferably connected to the exhaust hole of the shell 1. A plurality of arc-striking sheets 3311 arranged at intervals are provided in the middle part of the first isolating portion 331, and the gap formed between two adjacent arc-striking sheets 3311 serves as the 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 arc-striking sheet 3311 is as follows: Figure 5 , 6 As shown, there are two arc-striking pieces 3311 and the lower parts of the two arc-striking pieces 3311 are bent in the same direction, and the gap between the two arc-striking pieces 3311 serves as an arc-striking groove 331a. The N-pole moving contact 321 is rotatably mounted on the upper part of the first isolating portion 331, and the N-pole moving contact 321 passes through the isolating plate 33, the circuit board 41 and the partition 11 to be linked to the L-pole moving contact of the L-phase pole module 2, and the lower part of the N-pole moving contact 321 can swing on the first partition 11 to cooperate with the N-pole static contact. The N-pole static contact plate 322 of the N-pole static contact is arranged along the limiting plate 3312, and an N-pole static contact 323 is provided on the side where the N-pole static contact plate 322 extends into the first isolation part 331, and a static contact arc-starting piece 324 is also provided on the side where the N-pole static contact plate 322 extends into the first isolation part 331, and the static contact arc-starting piece 324 is located below the N-pole static contact 323. Preferably, one end of the static contact arc-starting piece 324 is connected to the N-pole static contact plate 322, and the other end of the static contact arc-starting piece 324 is in the same bending direction as the arc-starting piece 3311. The static contact arc-starting piece 324 is located on one side of the arc-starting piece 3311 and is connected to the shell 1 together with the arc-starting piece 3311. A space for the flow of power arc is reserved between the static contact arc-starting piece 324 and the arc-starting piece 3311, which is beneficial for the arc gas to discharge from the shell 1. When the N-pole contact mechanism 32 is opened or closed in the first isolating portion 331 , the arc striking groove 331 a and the arc striking track 331 b lead the arc out of the housing 1 .

[0043] The N-pole contact mechanism 32 also includes a conductive N-pole contact spring, which is used in conjunction with the L-pole spring 28 for nearby connection to the circuit board 41 to realize power supply to the N-pole and L-pole of the circuit board 41. This power supply method avoids the need to set up wires for powering the circuit board 41, and will not cause safety hazards due to wire breakage. At the same time, this power supply method occupies less space, which is conducive to the miniaturization of the circuit breaker.

[0044] Combination Figure 5 An embodiment of a first N-pole contact spring is provided, wherein the N-pole contact spring is used to provide a closing driving force for the N-pole moving contact 321 and enable the circuit board 41 to draw power from the N-pole, and the N-pole contact spring includes a first spring 3211 and a second spring 3212, wherein one end of the first spring 3211 is connected to the power drawing 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 to a 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 second spring 3212 is a tension spring, and is arranged on a side of the N-pole moving contact 321 close to the N-pole static contact, and the second spring 3212 provides a closing driving force for the N-pole moving contact 321 while enabling the circuit board 41 to draw power from the N-pole. It should be noted that, in this embodiment as the optimal solution, the part of the circuit board 41 corresponding to the conductive shaft is hollowed out and provided with an avoidance hole, so that the conductive shaft has no direct contact with the circuit board 41, and the conductive shaft needs to be firmly connected to the shell 1. Preferably, a conductive shaft mounting hole is provided on the shell 1, and the second spring 3212 that can provide a closing driving force for the N-pole moving contact 321 has a large elastic force. Therefore, the first spring 3211 and the second spring 3212 need to cooperate with each other to realize the N-pole power supply of the circuit board 41.

[0045] Combination Figure 6 A second embodiment of an N-pole contact spring is provided, wherein the N-pole contact spring comprises a third spring 3213 and a second spring 3212 (the second spring 3212 is not shown in the figure), one end of the third spring 3213 is inserted into a 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 a 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, and A torsion spring arm is bent and inserted into the conductive socket. Compared with the first embodiment of the N-pole contact spring, the second spring 3212 is a tension spring, which is arranged on the side of the N-pole moving contact 321 close to the N-pole static contact. The second spring 3212 provides the N-pole moving contact 321 with a closing driving force while enabling the circuit board 41 to draw power from the N-pole. In this embodiment, there is no need to set a power supply column 411 on the circuit board 41, which reduces the processing of the circuit board 41 and can ensure that the third spring 3213 maintains a stable electrical connection with the circuit board 41.

[0046] As a third embodiment of an N-pole contact spring, this 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, and the other end of the second spring 3212 is connected to the conductive shaft, and the conductive shaft is directly connected to the circuit board 41 to supply power to the circuit board 41, but the way in which the conductive shaft 41 is directly connected to the circuit board 41 is easy to damage the circuit board 41.

[0047] like Figure 2-3 As shown in , 5-9, the reclosing 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 connected in linkage, the circuit board 41 is arranged inside the N-phase pole module 3, and is stacked on the partition 11, the circuit board 41 is respectively connected to the L-phase pole module 2 and the N-phase pole module 3, and is used to control the power supply of the circuit board 41. Preferably, the circuit board 41 realizes the power supply of the circuit board 41 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 Fig. 9 As shown, a power supply column 411 is provided on one side of the circuit board 41, and a soldering pad is provided on the other side of the circuit board 41. The power supply column 411 is located in the N-phase pole module 3. The circuit board 41 is connected to the N-pole moving contact 321 through the N-pole contact spring, which is used to realize the N-pole power supply of the circuit board 41. The soldering pad is provided on the side of the circuit board 41 facing the L-phase pole module 2. One end of the L-pole spring 28 of the L-phase pole module 2 is connected to the soldering pad, and the other end is connected to the first arc-starting plate 261 of the L-phase pole module 2, so as to realize the L-pole power supply of the circuit board 41. This power supply method of the circuit board 41 avoids power supply through welding wires, simplifies the processing process, saves the space size of a one-pole circuit breaker, and is conducive to further reducing the volume of the circuit breaker. Of course, the power supply column 411 may not be provided on the circuit board 41, and the end of the N-pole contact spring connected to the circuit board 41 is directly inserted into a jack of the circuit board 41.

[0048] like Figure 5-7As shown, 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 part of the N-phase pole module 3, and is linked to the handle structure 21 of the L-phase pole module 2 through the handle linkage shaft, the driving handle 42 and the gear transmission mechanism 43 are driven to rotate by the closing drive 451 of the driving structure, the gear transmission mechanism 43 is connected to the motor 44, and the controller of the circuit board 41 drives the motor 44 to rotate after receiving the 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 drive 451 and the driving handle 42, thereby realizing the automatic closing of the circuit breaker.

[0049] like Figure 7 As shown, the driving structure also includes a trip drive unit 452 and a trip rocker arm 453. The trip drive unit 452 is arranged on the gear transmission mechanism 43, preferably on the side of the gear transmission mechanism 43 close to the partition 11. The trip rocker arm 453 is rotatably arranged on the partition 11. After the controller of the circuit board 41 receives the trip action signal, the driving motor 44 rotates. As the gear transmission mechanism 43 rotates, the trip drive unit 452 cooperates with the trip rocker arm 453 to rotate the trip rocker arm 453. The rotation of the trip rocker arm 453 causes the lock linkage shaft 231 to drive the operating mechanism 23 of the L-phase pole module 2 to operate. After the lock of the operating mechanism 23 and the latch structure of the jump latch are unlocked, the L-pole contact mechanism 22 and the N-pole contact mechanism 32 are opened, thereby realizing automatic opening of the circuit breaker.

[0050] like Figure 2 , 3As shown in , 5-7, the gear transmission mechanism 43 includes four first gears 431, second gears 432, third gears 433 and fourth gears 434 that are meshed in sequence, wherein the first gear 431 is meshed with the motor 44 through a worm, and the motor 44 is arranged 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 figure, and a closing drive member 451 is arranged on the side of the fourth gear 434 away from the circuit board 41, and preferably a mounting hole is arranged on the fourth gear 434, one end of the closing drive member 451 is installed in the mounting hole as a connecting end, and the other end of the closing drive member 451 cooperates with the driving handle 42 as a driving end; a closing drive part 452 is arranged on the side of the fourth gear 434 facing the circuit board 41, and the closing drive part 452 is specifically a protruding structure arranged on the fourth gear 434. The opening rocker arm 453 is rotatably mounted on the partition 11. The opening rocker arm 453 includes a short arm 4531 and a long arm 4532. The short arm 4531 is used to cooperate with the opening drive unit 452 to rotate the opening rocker arm 453. The long arm 4532 is used to cooperate with the lock linkage shaft 231 to make the operating mechanism 23 of the L-phase pole module 2 move. Preferably, the angle between the long arm 4532 and the short arm 4531 is in the range of 90 to 180 degrees. Preferably, a reset spring 454 is provided on one side of the opening rocker arm 453. The reset spring 454 is compressed when the opening rocker arm 453 rotates to open the gate. After the opening rocker arm 453 completes the opening rotation, the reset spring 454 provides a reset force to make the opening rocker arm 453 rotate back to its original position. Such a driving structure has the advantages of simple and reliable structure and convenient reset after tripping. Of course, the corresponding number of gears can be increased or decreased as needed, for example, only 2 or 3 gears are set, or 5 gears are set.

[0051] Combination Figure 2 , 3 5-7 provide an embodiment of the cooperation between a driving handle 42 and a gear transmission mechanism 43, wherein the driving handle 42 has a protruding handle portion 421, and a track groove 111 for cooperating with the driving end of the closing driving member 451 is provided on the partition plate 11 below the driving handle 42. As the fourth gear 434 performs the opening and closing rotation, the driving end of the closing driving member 451 slides along the track groove 111, 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 close the switch, Figure 5 , 6 The fourth gear 434 rotates counterclockwise. At this time, the driving end of the closing drive member 451 slides from the inner end of the track groove 111 to the outer end of the track groove 111. After the driving end contacts the handle portion 421, the handle portion 421 is pushed to realize the closing rotation of the driving handle 42. The closing rotation direction of the driving handle 42 is clockwise. At this time, the opening drive portion 452 and the opening rocker arm 453 have not yet cooperated. When the motor 44 drives the gear transmission mechanism 43 to rotate in the opening state, Figure 5 , 6 The fourth gear 434 rotates clockwise, at this time, the opening drive part 452 of the fourth gear 434 rotates and cooperates with the short arm 4531 of the opening rocker arm 453 to rotate the opening rocker arm 453, and the long arm 4532 of the opening rocker arm 453 cooperates with the lock linkage shaft 231 of the operating mechanism 23 to unlock the lock and jump lock of the operating mechanism 23, and the operating mechanism 23 opens the L-pole contact mechanism 22 and the N-pole contact mechanism 32, and at the same time, the driving end of the closing drive member 451 slides from the outer end of the track groove 111 to the inner end of the track groove 111, and the handle 421 rotates counterclockwise to open the gate after the driving end removes the pushing action. It should be noted that a avoidance groove 412 for the opening drive part 452 of the fourth gear 434 is provided on the circuit board 41, and a plurality of through holes are provided on the partition 11 for realizing the linkage between the L-phase pole module 2 and the reclosing module 4 and the N-phase pole module 3.

[0052] Combination Figure 8 As shown, a track groove 111 is provided on the upper part of the partition 11, and a linkage hole 112 for the lock linkage shaft 231 to pass through is provided in the middle part of the partition 11. Preferably, the linkage hole 112 is a waist-shaped hole, which allows the lock linkage shaft 231 to pass through and move in the linkage hole 112. Preferably, the opening rocker arm 453 and the reset spring 454 are rotatably installed in the space between the linkage hole 112 and the track groove 111, as shown in FIG. Figure 8 As shown, the reset spring 454 is located at the upper part of the opening rocker arm 453, and the short arm 4531 of the opening rocker arm 453 is used to cooperate with an elastic arm of the reset spring 454. When the opening rocker arm 453 rotates, the opening rocker arm 453 compresses the reset spring 454, and the reset force is provided by the reset spring 454 after the opening rocker arm rotates. A threading hole 113 is provided at the lower part of the partition 11, and the wire of the current transformer 27 passes through the threading hole 113. The wire of the current transformer 27 passes through the threading hole 113 and is connected to the circuit board 4, and is used to feed back the current signal of the main circuit to the controller of the circuit board 41. The partition 11 is also provided with a hole for the L-pole spring 28 to pass through.

[0053] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A compact reclosing circuit breaker, comprising an L-phase pole module (2) and an N-phase pole module (3) arranged in parallel, characterized in that: The L-phase pole module (2) comprises an L-pole incoming line terminal (241), a first arc-starting plate (261) and an L-pole spring (28), wherein the L-pole incoming line terminal (241) and the L-pole spring (28) are electrically connected via the first arc-starting plate (261); the N-phase pole module (3) comprises an N-pole incoming line terminal (311) and an N-pole outgoing line terminal (312) respectively arranged on both sides of the N-phase pole module (3), and a reclosing gate module is arranged between the N-pole incoming line terminal (311) and the N-pole outgoing line terminal (312). A circuit board (41) of a block (4) and an N-pole contact mechanism (32) stacked on the circuit board (41), the N-pole contact mechanism (32) comprising an N-pole moving contact (321) and an N-pole contact spring connected to the N-pole moving contact (321), the N-pole contact spring being used to provide a closing driving force for the N-pole moving contact (321), the circuit board (41) being respectively connected to the N-pole contact spring and the L-pole spring (28) for realizing N-pole power supply and L-pole power supply of the circuit board (41).

2. A compact reclosing circuit breaker according to claim 1, characterized in that: The N-pole contact spring comprises a first spring (3211) and a second spring (3212), one end of the first spring (3211) is connected to a power supply column (411) of a 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 an N-phase pole module (3), and the other end of the second spring (3212) is connected to an N-pole moving contact (321).

3. A compact reclosing circuit breaker according to claim 1, characterized in that: The N-pole contact spring comprises a third spring (3213) and a second spring (3212), one end of the third spring (3213) is inserted into a 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 a conductive shaft in the N-phase pole module (3), and the other end of the second spring (3212) is connected to the N-pole moving contact (321).

4. A compact reclosing circuit breaker according to claim 1, characterized in that: The N-pole contact spring only includes a second spring (3212), one end of the second spring (3212) is connected to the N-pole moving contact (321), and the other end of the second spring (3212) is connected to a conductive shaft in the N-pole module (3), and the conductive shaft is connected to the circuit board (41).

5. A compact reclosing circuit breaker according to any one of claims 1 to 4, characterized in that: A power extraction plate (262) is provided on the first arc-starting plate (261), a partition (11) is provided between the L-phase pole module (2) and the N-phase pole module (3), one end of the L-pole spring (28) passes through the partition (11) and is connected to the circuit board (41), and the other end of the L-pole spring (28) is connected to the power extraction plate (262).

6. A compact reclosing circuit breaker according to claim 1, characterized in that: The L-pole spring (28) is a compression spring, a welding pad matching the L-pole spring (28) is provided on the side of the circuit board (41) facing the partition (11), and the power taking plate (262) is protrudingly arranged on the side of the first arc starting plate (261) close to the partition (11).

7. A compact reclosing circuit breaker according to claim 1, characterized in that: A drive device for a reclosing module (4) is also provided in the N-phase pole module (3). The drive device is connected to the circuit board (41). The drive device comprises a drive handle (42), a gear transmission mechanism (43), a drive structure and a motor (44) which are linked together. After a controller of the circuit board (41) receives an action signal, the motor (44) and the gear transmission mechanism (43) are activated, and the L-phase pole module (2) and the N-phase pole module (3) are automatically opened and closed through the action of the drive structure.

8. A compact reclosing circuit breaker according to claim 7, characterized in that: The L-phase pole module (2) comprises a handle structure (21), an operating mechanism (23), and an L-pole contact mechanism (22) linked to an N-pole contact mechanism (32); the drive handle (42) is linked to the handle structure (21); the drive structure comprises a closing drive member (451), an opening drive portion (452) arranged on the gear transmission mechanism (43), and an opening rocker arm (453) rotatably mounted; After the controller of the circuit board (41) receives the closing action signal, the driving motor (44) rotates, and the gear transmission mechanism (43), the closing drive member (451) and the driving handle (42) cooperate with each other to make the operating mechanism (23) drive the L-pole contact mechanism (22) and the N-pole contact mechanism (32) to close, thereby realizing automatic closing of the circuit breaker; After the controller of the circuit board (41) receives the opening action signal, the driving motor (44) and the gear transmission mechanism (43) are rotated. As the gear transmission mechanism (43) rotates, the opening drive unit (452) cooperates with the opening rocker arm (453) to rotate the opening rocker arm (453). The opening rocker arm (453) drives the operating mechanism (23) of the L-phase pole module (2) to operate and opens the L-pole contact mechanism (22) and the N-pole contact mechanism (32), thereby realizing automatic opening of the circuit breaker.

9. A compact reclosing circuit breaker according to claim 8, characterized in that: The operating mechanism (23) comprises a support, a lever, a trip button, a lock button and a contact support, wherein the support is rotatably mounted in the L-phase pole module (2), the trip button and the lock button are rotatably mounted on the support, the contact support is connected to the support, one end of the lever is connected to the handle structure (21), and the other end is connected to the trip button, the trip button is snap-connected to one end arm of the lock button, one end of the contact support is connected to the L-pole moving contact, an assembly hole is provided on the lock button, a lock button linkage shaft (231) is installed in the assembly hole, the lock button linkage shaft (231) extends into the N-phase pole module (3) and cooperates with the opening rocker arm (453) in the drive structure, and is used to unlock the snap-connection structure of the trip button and the lock button in the operating mechanism (23) to open the circuit breaker.

10. A compact reclosing circuit breaker according to claim 9, characterized in that: The N-pole contact mechanism comprises an N-pole static contact, the N-pole static contact comprises an N-pole static contact plate (322), 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), and the N-pole static contact (323) and the N-pole moving contact (321) are arranged opposite to each other, the N-pole moving contact (321) is linked to the L-pole moving contact of the L-phase pole module (2), and a static contact arc-starting piece (324) is provided at one end of the N-pole static contact plate (322) where the N-pole static contact (323) is provided, and the other end of the N-pole static contact plate (322) is connected to the N-pole output terminal (312).

11. A compact reclosing circuit breaker according to claim 7, characterized in that: A partition (11) is provided between the L-phase pole module (2) and the N-phase pole module (3), a track groove (111) is provided on the upper part of the partition (11), and a linkage hole (112) is provided in the middle part of the partition (11).

12. A compact reclosing circuit breaker according to claim 2 or 3, characterized in that: The conductive shaft is mounted on a housing (1) of the circuit breaker, a conductive shaft mounting hole is provided on the housing (1), and a portion of the circuit board (41) corresponding to the conductive shaft is hollowed out and provided with an avoidance hole.

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