A compact reclosing circuit breaker

Abstract

A compact reclosing circuit breaker includes 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 by a partition; the L-phase pole module includes a handle structure, an operating mechanism and an L-pole contact mechanism, and the N-phase pole module includes a reclosing module, and the reclosing module includes a circuit board and a driving device connected to the circuit board, wherein the circuit board is arranged on one side of the partition, the driving device is stacked on the upper part of the circuit board and is respectively linked to the handle structure and the operating mechanism, an N-pole contact mechanism is stacked on the lower part of the circuit board, and an isolation plate is arranged between the N-pole contact mechanism and the circuit board, the N-pole moving contact of the N-pole contact mechanism passes through the isolation plate, the circuit board and the partition and is linked to the L-pole moving contact of the L-pole contact mechanism, and the reclosing module drives the L-phase pole module to automatically open and close the circuit breaker. The present invention combines the reclosing module and the N-phase pole module in the same pole to reduce the volume 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] Currently, 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 intelligence and miniaturization of circuit breakers. 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 a shell and an L-phase pole module and an N-phase pole module arranged inside the shell, wherein the L-phase pole module is separated from the N-phase pole module by a partition, 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 to the circuit board, the circuit board is arranged on one side of the partition, the driving device is stacked on the circuit board and is respectively linked to the handle structure and the operating mechanism, the N-pole contact mechanism is stacked on the circuit board, and an isolation plate is arranged between the N-pole contact mechanism and the circuit board, the N-pole moving contact of the N-pole contact mechanism passes through the isolation plate, the circuit board and the partition to be linked to the L-pole moving contact of the L-pole contact mechanism, and the reclosing module drives the L-phase pole module to operate to automatically open and close the circuit breaker.

[0007] Furthermore, the N-phase pole module also includes an N-pole incoming terminal and an N-pole outgoing terminal, the N-pole contact mechanism includes an N-pole moving contact and an N-pole static contact that cooperate with each other, the N-pole moving contact is rotatably installed on the upper part of the isolation plate, the N-pole moving contact is connected to the N-pole incoming terminal through a wire, the N-pole static contact includes an N-pole static touch plate, the N-pole static touch plate is fixedly arranged along one side wall of the isolation plate, one end of the N-pole static touch 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, and a static contact arc-starting sheet is provided at one end of the N-pole static touch plate where the N-pole static contact is provided, the other end of the N-pole static touch plate is connected to the N-pole outgoing terminal, and an arc-starting structure corresponding to the N-pole contact mechanism is provided on the isolation plate.

[0008] Furthermore, the isolation plate includes a first isolation portion for installing an N-pole contact mechanism, and an arc-striking structure corresponding to the N-pole contact mechanism is provided in the first isolation portion. The arc-striking structure includes an arc-striking groove and an arc-striking track respectively arranged in the first isolation portion, the N-pole moving contact swings above the arc-striking groove, and the N-pole static contact is arranged along the arc-striking track.

[0009] Furthermore, the isolation plate includes an integrally formed first isolation part and a second isolation part, the first isolation part is plate-shaped, one side of the first isolation part is connected to the second isolation part, the second isolation part is provided with an installation groove for installing the N-pole incoming terminal, the lower part of the side wall on the other side of the first isolation part is bent in a direction away from the first isolation part to form a limit plate, the limit plate cooperates with the inner wall of the shell at the lower part of the N-phase pole module to form an arc-striking runway, the N-pole static contact can be arranged along the arc-striking runway and connected to the N-pole outgoing terminal, a plurality of arc-striking sheets arranged at intervals are provided in the middle part of the first isolation part, the gap formed between two adjacent arc-striking sheets serves as an arc-striking groove, the N-pole moving contact is stacked above the arc-striking groove, and the N-pole moving contact can swing above the arc-striking groove.

[0010] Furthermore, the N-pole contact mechanism also includes an N-pole contact spring electrically connected to the N-pole moving contact, and a first arc-starting plate and an L-pole spring electrically connected to the first arc-starting plate are provided in the L-phase pole module; a power supply column is provided on one side of the circuit board, and the power supply column is connected to the N-pole contact spring to realize N-pole power supply of the circuit board; a welding pad is provided on the other side of the circuit board, and the welding pad is connected to the L-pole spring to realize L-pole power supply of the circuit board.

[0011] 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.

[0012] Furthermore, the driving device is stacked on an upper portion of one side of the circuit board, and the isolation board is stacked on a lower portion of the other side of the circuit board.

[0013] Furthermore, the driving device includes a driving handle, a gear transmission mechanism, a driving structure and a motor. The driving handle is rotatably mounted on the partition, and the driving handle is linked to the handle structure through a handle connecting shaft. The gear transmission mechanism is arranged at the lower part of the driving handle, and the motor is arranged on one side of the N-phase pole module and meshes with the gear transmission mechanism. The driving structure arranged in the N-phase pole module cooperates with the driving handle and the operating mechanism respectively as the gear transmission mechanism rotates. When the circuit board driving motor and the gear transmission mechanism are closed and rotated, the driving structure causes the driving handle to drive the handle structure to close and rotate, and closes the L-pole contact mechanism and the N-pole contact mechanism through the operating mechanism; when the circuit board driving motor and the gear transmission mechanism are opened and rotated, the driving structure opens the L-pole contact mechanism and the N-pole contact mechanism by driving the operating mechanism.

[0014] Furthermore, the driving structure includes a closing drive, which is arranged on the gear transmission mechanism and rotates with the gear transmission mechanism. A handle portion is protruding from one side of the driving handle. When the gear transmission mechanism rotates in closing, the closing drive cooperates with the handle portion to make the driving handle rotate in closing, and the handle structure closes the L-pole contact mechanism and the N-pole contact mechanism by actuating the operating mechanism.

[0015] Furthermore, the driving structure includes a tripping drive unit and a tripping rocker arm. The tripping drive unit is arranged on the gear transmission mechanism and is located on the side facing the partition. The tripping rocker arm is rotatably installed on the partition. The locking linkage shaft of the operating mechanism passes through the partition and extends into the N-phase pole module for cooperating with the tripping rocker arm. When the gear transmission mechanism rotates to trip, the tripping drive unit drives the tripping rocker arm to rotate and makes the tripping rocker arm cooperate with the locking linkage shaft to enable the operating mechanism to operate to realize the tripping of the L-pole contact mechanism and the N-pole contact mechanism.

[0016] Furthermore, a return spring is provided on one side of the opening rocker arm, and the return spring is compressed when the opening rocker arm performs opening rotation. After the opening rocker arm completes the opening rotation, the return spring provides a return force to rotate the opening rocker arm back to its original position.

[0017] A compact reclosing circuit breaker of the present invention has an L-phase pole module and an N-phase pole module separated by a partition, and a reclosing module is arranged in the N-phase pole module, and a circuit board of the reclosing module and an N-pole contact mechanism are separated by an isolation plate. This structure of merging the reclosing module and the N-phase pole module in the same pole enables a 1PN circuit breaker of the same volume to have a reclosing function, thereby reducing the volume of the circuit breaker.

[0018] In addition, no arc extinguishing chamber is set in the N-phase pole module. The arc when the N-pole contact mechanism is opened and closed is led out of the shell through the arc striking structure set on the isolation plate, and the N-pole static contact is set in the arc striking track in the arc striking structure, and the static contact arc striking plate set with the N-pole static contact constitutes the arc extinguishing system of the N-pole contact mechanism, which is beneficial to reducing the volume of the circuit breaker.

[0019] In addition, power supply posts and pads are respectively provided on both sides of the circuit board, and power supply of the N-pole and L-pole of the circuit board is realized through the N-pole contact spring and L-pole spring provided in the N-phase pole module, thereby reducing wire welding and further reducing the size of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a compact reclosing circuit breaker of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of a compact reclosing circuit breaker of the present invention;

[0022] 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);

[0023] Figure 4 It is a structural schematic diagram of an L-phase pole module in a compact reclosing circuit breaker of the present invention;

[0024] Figure 5 It is a structural schematic diagram of an N-phase pole module in a compact reclosing circuit breaker of the present invention;

[0025] Figure 6 It is a structural schematic diagram of an N-phase pole module in a compact reclosing circuit breaker of the present invention;

[0026] Figure 7 It is a schematic diagram of the internal structure of a compact reclosing circuit breaker of the present invention;

[0027] Figure 8 It is a schematic diagram of the internal structure of a compact reclosing circuit breaker of the present invention;

[0028] Fig. 9 The present invention is a schematic diagram of the circuit board structure of a compact reclosing circuit breaker. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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 .

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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 a housing (1) and an L-phase pole module (2) and an N-phase pole module (3) arranged inside the housing (1), wherein the L-phase pole module (2) and the N-phase pole module (3) are separated by a partition (11), 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); 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 to the circuit board (41); the circuit board (41) is arranged on one side of the partition (11); the driving device is stacked on the circuit board (41) and is respectively linked to the handle structure (21) and the operating mechanism (23); the N-pole contact mechanism ( The invention relates to a circuit board (41) and a circuit board (41) stacked on the N-pole contact mechanism (32), and an isolation plate (33) is provided between the N-pole contact mechanism (32) and the circuit board (41); the N-pole moving contact (321) of the N-pole contact mechanism (32) passes through the isolation plate (33), the circuit board (41) and the partition plate (11) and is linked to the L-pole moving contact of the L-pole contact mechanism (22); an arc-starting structure corresponding to the N-pole contact mechanism (32) is provided on the isolation plate (33); and the reclosing module (4) automatically opens and closes the circuit breaker by driving the L-phase pole module (2) to operate.

2. A compact reclosing circuit breaker according to claim 1, characterized in that: 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 that cooperate with each other; the N-pole moving contact (321) is rotatably mounted 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) via a wire; the N-pole static contact comprises an N-pole static contact plate (322); the N-pole static contact plate (322) An N-pole static contact (323) matched with an N-pole moving contact (321) is fixedly arranged along a 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) and the N-pole moving contact (321) is arranged opposite to the N-pole static contact (323), 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 arranged, and the other end of the N-pole static contact plate (322) is connected to the N-pole output terminal (312).

3. A compact reclosing circuit breaker according to claim 1 or 2, characterized in that: The isolation plate (33) comprises a first isolation portion (331) for mounting an N-pole contact mechanism (32); an arc-striking structure corresponding to the N-pole contact mechanism (32) is provided in the first isolation portion (331); the arc-striking structure comprises an arc-striking groove (331a) and an arc-striking track (331b) respectively arranged in the first isolation portion (331); 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).

4. A compact reclosing circuit breaker according to claim 3, characterized in that: The isolation plate (33) comprises an integrally formed first isolation portion (331) and a second isolation portion (332), the first isolation portion (331) being in the shape of a plate, one side of the first isolation portion (331) being connected to the second isolation portion (332), the second isolation portion (332) being provided with an installation groove for installing an N-pole incoming terminal (311), the lower portion of the side wall on the other side of the first isolation portion (331) being bent in a direction away from the first isolation portion (331) to form a limiting plate (3312), the limiting plate (3312) being connected to the lower portion of the N-phase pole module (3) The inner wall of the housing (1) cooperates 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), a plurality of arc striking pieces (3311) arranged at intervals are provided in the middle of the first isolating portion (331), a gap formed between two adjacent arc striking pieces (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).

5. A compact reclosing circuit breaker according to claim 1, characterized in that: The N-pole contact mechanism (32) further comprises an N-pole contact spring electrically connected to the N-pole moving contact (321); a first arc-starting plate (261) and an L-pole spring (28) electrically connected to the first arc-starting plate (261) are provided in the L-phase pole module (2); a power supply column (411) is provided on one side of the circuit board (41); the power supply column (411) is connected to the N-pole contact spring for realizing N-pole power supply of the circuit board (41); a welding pad is provided on the other side of the circuit board (41); the welding pad is connected to the L-pole spring (28) for realizing L-pole power supply of the circuit board (41).

6. A compact reclosing circuit breaker according to claim 5, 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).

7. A compact reclosing circuit breaker according to claim 1, characterized in that: The driving device is stacked on an upper portion of one side of the circuit board (41), and the isolation plate (33) is stacked on a lower portion of the other side of the circuit board (41).

8. A compact reclosing circuit breaker according to claim 1, characterized in that: The driving device comprises a driving handle (42), a gear transmission mechanism (43), a driving structure and a motor (44); the driving handle (42) is rotatably mounted on the partition (11); the driving handle (42) is linked to the handle structure (21) via a handle connecting shaft; the gear transmission mechanism (43) is arranged at the lower part of the driving handle (42); the motor (44) is arranged at one side of the N-phase pole module (3) and meshes with the gear transmission mechanism (43); the driving structure arranged in the N-phase pole module (3) is respectively connected to the driving handle (42) and the gear transmission mechanism (43) as the gear transmission mechanism (43) rotates. When the circuit board (41) drives the motor (44) and the gear transmission mechanism (43) to rotate for closing, the driving structure causes the driving handle (42) to drive the handle structure (21) to rotate for closing and close, and closes the L-pole contact mechanism (22) and the N-pole contact mechanism (32) through the operating mechanism (23); when the circuit board (41) drives the motor (44) and the gear transmission mechanism (43) to rotate for opening, the driving structure causes the L-pole contact mechanism (22) and the N-pole contact mechanism (32) to open by driving the operating mechanism (23).

9. A compact reclosing circuit breaker according to claim 8, characterized in that: The driving structure comprises a closing drive member (451), the closing drive member (451) being arranged on the gear transmission mechanism (43) and rotating with the gear transmission mechanism (43); a handle portion (421) is protrudingly provided on one side of the driving handle (42); when the gear transmission mechanism (43) is closed and rotated, the closing drive member (451) cooperates with the handle portion (421) to cause the driving handle (42) to close and rotate, and the handle structure (21) causes the L-pole contact mechanism (22) and the N-pole contact mechanism (32) to close by causing the operating mechanism (23) to actuate.

10. A compact reclosing circuit breaker according to claim 8, characterized in that: The driving structure comprises a switch-off driving part (452) and a switch-off rocker arm (453); the switch-off driving part (452) is arranged on the gear transmission mechanism (43) and is located on the side facing the partition (11); the switch-off rocker arm (453) is rotatably mounted on the partition (11); the lock linkage shaft (231) of the operating mechanism (23) passes through the partition (11) and extends into the N-phase pole module (3) for cooperating with the switch-off rocker arm (453); when the gear transmission mechanism (43) rotates for switch-off, the switch-off driving part (452) drives the switch-off rocker arm (453) to rotate and makes the switch-off rocker arm (453) cooperate with the lock linkage shaft (231) so that the operating mechanism (23) is actuated to realize the switch-off of the L-pole contact mechanism (22) and the N-pole contact mechanism (32).

11. A compact reclosing circuit breaker according to claim 10, characterized in that: A return spring (454) is provided on one side of the opening rocker arm (453), and the return spring (454) is compressed when the opening rocker arm (453) performs opening rotation. After the opening rocker arm (453) completes the opening rotation, the return spring (454) provides a return force to rotate the opening rocker arm (453) back to its original position.

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