Circuit breaker

Abstract

The invention relates to the technical field of electric power, and discloses a circuit breaker which comprises a control mainboard, a circuit breaker body, a built-in opening driving module, a hasp assembly, a moving contact assembly and a tension spring, and a single-side structure of the moving contact assembly can be separated; when the hasp assembly is in a matching state, the moving contact assembly is limited to perform opening operation, and when the moving contact assembly is in a closing position, single-side structures of the moving contact assembly are separated; and the control mainboard is in communication connection with the opening driving module and is used for controlling the opening driving module to drive the hasp assembly to release, so that the limitation on the moving contact assembly is relieved, and the moving contact assembly performs opening operation under the tension action of the tension spring. According to the circuit breaker, internal closing parts and a transmission connection relation are simplified, so that the overall structure of the circuit breaker is compact, the size of the circuit breaker is reduced, the situation that opening and closing control fails or is not timely due to jamming of an external structure and the parts is avoided, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and disconnect current under normal circuit conditions, and can close, carry and disconnect current under abnormal circuit conditions within a specified time. It can be used to distribute electric energy and in asynchronous motor circuits that are not frequently started. It can automatically cut off the circuit when serious overload or short circuit faults occur in the power supply line and the motor. Its function is equivalent to the combination of a fuse switch and an over-underheating relay, and generally no parts need to be changed after disconnecting the fault current. At present, it has been widely used.

[0003] At present, the opening drive module of the circuit breaker on the market is usually placed on the side of the main switch, which makes the overall structure of the circuit breaker larger, not easy to install and layout, and wastes space resources. In addition, the entire opening and closing transmission involves many components, which is prone to component jamming and other faults that lead to unsuccessful or untimely opening and closing. The failure rate of controlling the opening is high, which is prone to safety hazards. Summary of the invention

[0004] The present application provides a circuit breaker for solving the problems that the opening drive module is externally placed on the side of the main switch, making the overall structure of the intelligent circuit breaker larger, and there are more opening and closing transmission components, and the failure rate of the opening control is higher.

[0005] In a first aspect, the present application provides a circuit breaker comprising: a control main board and a circuit breaker body with a built-in opening drive module, the circuit breaker body comprising an opening and closing mechanism, the opening and closing mechanism comprising a buckle assembly, a moving contact assembly and a tension spring, and the single-side structure of the moving contact assembly is detachable;

[0006] The moving contact assembly is respectively connected to the buckle assembly and the tension spring in a transmission manner, and the opening drive module is connected to the buckle assembly in a transmission manner;

[0007] The buckle assembly, in the mating state, offsets the opening force applied by the tension spring to the moving contact assembly, restricting the moving contact assembly from performing an opening operation. When the moving contact assembly is in the closing position, the single-side structure of the moving contact assembly is separated;

[0008] The control main board is communicatively connected with the opening drive module, and is used to control the opening drive module to drive the latch assembly to be disengaged. The latch assembly releases the restriction on the moving contact assembly in the disengaged state, and the moving contact assembly performs an opening operation under the tension of the tension spring.

[0009] According to the aforementioned embodiment of the present invention, the moving contact assembly comprises a moving contact and a contact seat, the moving contact is arranged in a receiving groove of the contact seat, one side of the moving contact is rotatably connected to the contact seat, and the other side of the moving contact is detachably connected to the contact seat;

[0010] The tension spring is transmission-connected to the moving contact, and the buckle assembly is rotationally connected to the contact seat;

[0011] When the switch is closed, the moving contact is separated from the single-side structure of the contact seat.

[0012] According to the aforementioned embodiment of the present invention, the moving contact is provided with an open connection portion, and the contact seat is detachably connected to the open connection portion via a limiter;

[0013] When the switch is closed, the open connection portion is separated from the limiting member.

[0014] According to the aforementioned embodiment of the present invention, the opening switch driving module comprises: an actuator and a trip toggle assembly, wherein the trip toggle assembly is rotatably disposed on a motion path of the actuator;

[0015] The control mainboard controls the actuator to drive the tripping toggle assembly to rotate according to a set threshold value or a tripping instruction, and the tripping toggle assembly drives the buckle assembly to trip.

[0016] According to the aforementioned embodiment of the present invention, the trip toggle assembly includes a trip toggle block and a toggle block reset torsion spring;

[0017] The tripping toggle block is rotatably arranged, and the toggle block reset torsion spring is transmission-connected with the tripping toggle block. After the actuator is reset, the tripping toggle block is reset under the elastic force of the toggle block reset torsion spring.

[0018] According to the aforementioned embodiment of the present invention, the buckle assembly includes a transmission block and a clamping block;

[0019] The transmission block and the clamping block are respectively connected to the moving contact assembly in rotation, and the clamping block is connected to the opening drive module in transmission;

[0020] When in the closing position, the clamping block and the transmission block are snap-fitted, and the clamping block and the transmission block restrict the moving contact assembly from performing an opening operation in the matching state;

[0021] Under the drive of the opening drive module, the clamping block is separated from the transmission block, and the restriction on the moving contact assembly is released in the tripped state, and the moving contact assembly performs an opening operation.

[0022] According to the aforementioned embodiment of the present invention, the buckle assembly further comprises: a card block reset spring rod;

[0023] One end of the card block reset spring rod is connected to the card block, and the other end of the card block reset spring rod is connected to the transmission block. The card block is reset under the elastic force of the card block reset spring rod, and the card block and the transmission block resume the buckle fit.

[0024] According to the aforementioned embodiment of the present invention, the buckle assembly further includes a transmission rod, and the opening and closing mechanism further includes a handle assembly.

[0025] The handle assembly is transmission-connected to the transmission block via a transmission rod.

[0026] According to the aforementioned embodiment of the present invention, the circuit breaker further comprises an overload protection module, which is transmission-connected to the buckle assembly and is used to generate a tripping force on the buckle assembly when the circuit is overloaded.

[0027] According to the aforementioned embodiment of the present invention, the overload protection module includes a bimetallic strip and an overload pull rod;

[0028] The overload pull rod is transmission-connected with the buckle assembly;

[0029] When the circuit is overloaded, the bimetallic strip is bent by heat to push the overload pull rod, and the overload pull rod generates a tripping force on the buckle assembly.

[0030] According to the aforementioned embodiment of the present invention, the circuit breaker further comprises a short circuit protection module, which is transmission-connected to the buckle assembly and is used to generate a tripping force on the buckle assembly when the circuit is short-circuited.

[0031] According to the aforementioned embodiment of the present invention, the circuit breaker also includes a zero-sequence current transformer, which is communicatively connected to the control main board and is used to detect leakage induced current. When the leakage induced current exceeds a preset current threshold, the control main board controls the opening drive module to drive the latch assembly so that the moving contact assembly performs an opening operation.

[0032] According to the aforementioned embodiment of the present invention, the circuit breaker also includes an over-voltage and under-voltage protection module, which is communicatively connected to the control main board and is used to collect the voltage at the output terminal of the circuit breaker. When the voltage at the output terminal triggers the over-voltage and under-voltage protection, the control main board controls the opening drive module to drive the latch assembly so that the moving contact assembly performs an opening operation.

[0033] According to the aforementioned embodiment of the present invention, the circuit breaker also includes a current transformer, which is communicatively connected to the control main board and is used to collect the main circuit induced current of the circuit breaker. The control main board determines the current power consumption based on the main circuit induced current and the output terminal voltage, and when the current power consumption exceeds the limited power consumption, controls the opening drive module to drive the latch assembly so that the moving contact assembly performs an opening operation.

[0034] According to the aforementioned embodiment of the present invention, the circuit breaker further comprises an arc extinguishing module, and the arc extinguishing module is used to extinguish the arc when the moving contact assembly breaks the circuit.

[0035] In the technical solution provided by the present application, the integration of the circuit breaker is improved by integrating the opening drive module into the circuit breaker body, and the latch assembly is rotatably connected to the moving contact assembly, and the moving contact assembly is restricted from performing an opening operation in the mating state. When the moving contact assembly is in the closed position, the single-side structure is separated, and the control main board is communicatively connected to the opening drive module, and the opening drive module is controlled to drive the latch assembly to be disengaged, and the restriction on the moving contact assembly is released in the tripped state, so that the moving contact assembly can perform an opening operation, simplifying the internal closing and opening components and the transmission connection relationship, making the overall structure of the circuit breaker compact, reducing the size of the circuit breaker, avoiding the jamming of the external structure and components, and easily resulting in the failure or untimely control of opening and closing, thereby reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of an overall external structure of a circuit breaker provided in an embodiment of the present application;

[0038] Figure 2 Another schematic diagram of the overall external structure of a circuit breaker provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of an internal structure of a circuit breaker body provided in an embodiment of the present application;

[0040] Figure 4 For this application Figure 3 A partial enlarged schematic diagram of the middle A area;

[0041] Figure 5A schematic diagram of the opening and closing structure of a circuit breaker provided in an embodiment of the present application;

[0042] Figure 6 A schematic diagram of a closing process of a circuit breaker provided in an embodiment of the present application;

[0043] Figure 7 A schematic diagram of the opening process of a circuit breaker provided in an embodiment of the present application;

[0044] Figure 8 For this application Figure 7 A partial enlarged schematic diagram of the C area in the middle.

[0045] Description of Figure Numbers:

[0046] 100, circuit breaker; 10, control main board; 20, circuit breaker body; 21, opening drive module; 211, actuator; 2111, push rod; 212, trip toggle assembly; 2121, trip toggle block; 2122, toggle block reset torsion spring; 22, opening and closing mechanism; 221, buckle assembly; 2211, transmission block; 2212, card block; 2213, card block reset spring rod; 2214, transmission rod; 222, moving contact assembly; 2221, moving contact; 2221a, opening connection portion; 2221b, A connecting hole; 2221c, a second connecting hole; 2222, a contact seat; 2222a, a limit piece; 2222b, a first connecting portion; 2222c, a second connecting portion; 2222d, a connecting piece; 223, a tension spring; 224, a handle assembly; 2241, a handle; 2242, a handle reset torsion spring; 23, an overload protection module; 231, a bimetallic strip; 232, an overload pull rod; 24, a short-circuit protection module; 25, a zero-sequence current transformer; 26, a current transformer; 27, an arc extinguishing module; 30, a housing. DETAILED DESCRIPTION

[0047] The embodiment of the present invention provides a circuit breaker, which is used to simplify the components of partial closing in the circuit breaker and their transmission connection relationship, and improve the grounding reliability.

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] This embodiment provides a circuit breaker 100 whose overall appearance is as follows Figure 1 As shown, the circuit breaker 100 is composed of a control main board 10, a circuit breaker 100 body and a housing 30 and other components. Figure 2 As shown, the control mainboard 10 is connected to each intelligent module in the circuit breaker 100 body, and the corresponding intelligent modules collect parameters such as voltage, current and temperature to realize the power consumption recording function. The control mainboard 10 is connected to the opening drive module 21 for realizing remote opening control. In this embodiment, the opening drive module 21 is built into the circuit breaker 100 body, so that the driving opening transmission is less, the performance is higher, and it does not occupy the space of other intelligent modules, so that the layout of the components of the board is more flexible, and the size of the overall intelligent circuit breaker is reduced. The following reference Figure 3-7 , the internal structure of the circuit breaker 100 body is described:

[0052] See also Figure 3-4 The circuit breaker 100 body includes a built-in opening drive module 21 and an opening and closing mechanism 22. The opening drive module 21 and the opening and closing mechanism 22 are transmission connected. The control main board 10 controls the opening drive module 21 to drive the opening and closing mechanism 22 to perform an opening operation. The opening drive module 21 includes an open position and a closed position. When the opening drive module 21 is in the open position, the opening drive module 21 applies an opening force to the opening and closing mechanism 22 so that the opening and closing mechanism 22 performs an opening operation.

[0053] Among them, the opening and closing mechanism 22 includes a latch assembly 221, a moving contact assembly 222 and a tension spring 223, and the single-side structure of the moving contact assembly 222 is detachable; the moving contact assembly 222 is respectively connected to the latch assembly 221 and the tension spring 223, and the opening drive module 21 is connected to the latch assembly 221.

[0054] When the latch assembly 221 is in the mating state, it offsets the opening force applied by the tension spring 223 to the moving contact assembly 222, restricting the moving contact assembly 222 from performing the opening operation. When the moving contact assembly 222 is in the closing position, the single-side structure of the moving contact assembly 222 is separated;

[0055] The control motherboard 10 is in communication connection with the opening drive module 21, and is used to control the opening drive module 21 to drive the latch assembly 221 to trip. The latch assembly 221 releases the restriction on the moving contact assembly 222 in the tripped state, and the moving contact assembly 222 performs the opening operation under the tension of the tension spring 223.

[0056] The above-mentioned opening and closing mechanism 22 also includes static contacts and other components that perform opening and closing functions, which are not marked in the figure.

[0057] See also Figure 4 Specifically, the buckle assembly 221 includes a transmission block 2211 and a clamping block 2212; the transmission block 2211 and the clamping block 2212 are respectively rotatably connected to the moving contact assembly 222, and the clamping block 2212 is transmission-connected to the opening drive module 21;

[0058] Optionally, the transmission block 2211 and the clamping block 2212 are arranged on the same side of the contact seat 2222, the transmission block 2211 is transmission-connected to one end of the contact seat 2222, and the clamping block 2212 is rotationally connected to the other end of the contact seat 2222. The buckle assembly 221 of this embodiment simplifies the parts and connection relationship required for buckle matching by providing a detachable transmission block 2211 and a clamping block 2212, both of which are installed on the contact seat 2222.

[0059] Optionally, the ends of the clamping block 2212 and the transmission block 2211 are provided with cooperating corner structures to achieve locking. Optionally, the corner structure of the transmission block 2211 is a square concave corner that cooperates with the square corner of the clamping block 2212.

[0060] Optionally, the buckle assembly 221 also includes: a card block reset spring rod 2213; one end of the card block reset spring rod 2213 is connected to the card block 2212, and the other end of the card block reset spring rod 2213 is connected to the transmission block 2211, the card block 2212 is reset under the elastic force of the card block reset spring rod 2213, and the card block 2212 and the transmission block 2211 resume the buckle fit.

[0061] The card block reset spring rod 2213 of the present embodiment provides a force for bringing the card block 2212 and the transmission block 2211 closer to each other, so as to ensure that the two can be tightly abutted together when snap-fitted, thereby realizing restriction on corresponding components. When the opening switch driving module 21 applies a tripping force to the snap assembly 221, the tripping force is greater than the force of the card block reset spring rod 2213, so as to realize separation of the card block 2212 and the transmission block 2211, i.e., tripping. When the opening switch driving module 21 is retracted, i.e., when no further tripping force is applied, the card block 2212 and the transmission block 2211 can be re-abutted against each other under the reset force of the card block reset spring rod 2213, so as to realize snap-fitting.

[0062] In the related technologies of the moving contact assembly 222, the transmission connection relationship of opening and closing is relatively complicated. The moving contact assembly 222 of the traditional contact assembly requires a tension spring 223 and a pre-compression spring for transmission connection of opening and closing, wherein the tension spring 223 is used to provide the opening tension, and the pre-compression spring is used to provide the closing force. This embodiment provides a compact opening structure by setting a single-side detachable moving contact assembly 222, and applies the opening and closing forces through the tension spring, realizing the two-in-one function of the pre-compression spring and the tension spring, saving the pre-compression spring and reducing the failure points.

[0063] Figure 5 An example of a single-sided detachable moving contact assembly 222 of the present application is provided. Specifically, the moving contact assembly 222 includes a moving contact 2221 and a contact seat 2222. The moving contact 2221 is arranged in a receiving groove of the contact seat 2222. One side of the moving contact 2221 is rotatably connected to the contact seat 2222, and the other side of the moving contact 2221 is detachably connected to the contact seat 2222; the tension spring 223 is transmission-connected to the moving contact 2221, and the latch assembly 221 is rotatably connected to the contact seat 2222; when the switch is closed, the moving contact 2221 is separated from the single-sided structure of the contact seat 2222.

[0064] Optionally, the moving contact 2221 is provided with an open connection portion 2221 a, and the limiting member 2222 a of the contact seat 2222 is detachably connected to the open connection portion 2221 a.

[0065] When the switch is closed, the open connection portion 2221a is separated from the limiting member 2222a.

[0066] Optionally, a first connection portion 2222b and a second connection portion 2222c are provided on both sides of the receiving groove, and the first connection portion 2222b and the second connection portion 2222c of the contact holder 2222 may be through double connection holes, such as Figure 5 As shown, it may also be a single connection hole, or one side may be a double connection hole and the other side may be a single connection hole, and this embodiment does not impose any specific limitation.

[0067] Specifically, the opening connection portion 2221a of the moving contact 2221 and the first connection portion 2222b of the contact seat 2222 are detachably connected via a limiting member 2232d. The opening connection portion 2221a cooperates with the limiting member 2232d, and the moving contact 2221 and the contact seat 2222 are separable in a target direction.

[0068] Specifically, the moving contact 2221 further includes a first connecting hole 2221 b , and the first connecting hole 2221 b of the moving contact 2221 is rotatably connected to the second connecting portion 2222 c of the contact base 2222 through a connecting member 2222 d .

[0069] Specifically, the moving contact 2221 also includes a second connecting hole 2231c, one end of the tension spring 223 is connected to the housing 30 through a fixing member, and the other end of the tension spring 223 is transmission-connected to the second connecting hole 2231c of the moving contact 2221d, and the tension spring 223 provides tension to the moving contact 2221.

[0070] In the present application, the latch assembly 221 includes a mating state and a disengaged state. When the latch assembly 221 is in the mating state, it can restrict the moving contact assembly 222 from performing a disconnecting operation. When the latch assembly 221 is in the disengaged state, the restriction on the moving contact assembly 222 is released, and the moving contact assembly 222 can further perform a disconnecting operation under the tension of the tension spring 223, that is, the moving contact is separated from the static contact.

[0071] Optionally, the transmission block 2211 and the clamping block 2212 are arranged on the same side outside the receiving groove of the contact seat 2222, the transmission block 2211 is rotatably connected to the second connection portion 2222c of the contact seat 2222 through the connecting member 2222d, and the clamping block 2212 is rotatably connected to the first connection portion 2222b of the contact seat 2222 through the limiting member 2232d. The buckle assembly 221 of this embodiment simplifies the parts and connection relationship required for buckle matching by providing a detachable transmission block 2211 and a clamping block 2212, both of which are installed on the contact seat 2222.

[0072] It is understandable that the connector 2222d of the present application can pass through the transmission block 2211, the second connection portion 2222c of the contact seat 2222 and the first connection hole 2221b of the moving contact 2221 to connect the three together; the limiter 2222a can be a pin or other connector, the pin passes through the block 2212, the opening connection portion 2221a of the moving contact and the first connection portion 2222b of the contact seat 2222 to connect the three together, and the block 2212 can rotate with the pin as the axis. This embodiment provides a compact and efficient buckle structure. Under appropriate circumstances, the transmission block 2211 and the block 2212 can also be installed on the contact seat 2222 in other ways, and other buckle assembly 221 structures can also be used, which is not specifically limited in this embodiment.

[0073] Optionally, the buckle assembly 221 further includes a transmission rod 2214, and the opening and closing mechanism 22 further includes a handle assembly 224, and the handle assembly 224 is transmission-connected to the transmission block 2211 via the transmission rod 2214. The handle assembly of this embodiment can realize manual opening and closing operations.

[0074] Optionally, one end of the transmission rod is transmission-connected to the handle assembly, and the other end of the transmission rod is transmission-connected to the transmission block 2211 .

[0075] Specifically, the other end of the transmission rod may be transmission-connected to the transmission block 2211 via a connector 2222d, or may be transmission-connected to the transmission block 2211 via other methods, which is not specifically limited in this embodiment.

[0076] Optionally, the transmission block 2211 includes a first transmission part and a second transmission part, wherein the first transmission part is rotatably connected to the second connection part 2222c through a connecting member 2232c, and the other end of the transmission rod is transmission-connected to the second transmission part, such as Figure 3-4 , Figure 6-7 As shown, the second transmission part is arranged near the corner where the transmission block and the clamping block cooperate, so that the tripping can be achieved more efficiently when the switch is manually opened.

[0077] Reference Figure 6 The handle assembly 224 includes a handle 2241 and a handle reset member, wherein the handle reset member can be a handle reset torsion spring 2242, such as Figure 3 As shown, the handle reset member may be other suitable components.

[0078] The handle 2241 protrudes from the housing 30 so that the user can manually open and close the switch through the handle. The handle 2241 can be rotated manually or automatically between the closed position and the open position. The handle reset member applies a reset force to the handle 2241 to move the handle 2241 to the open position. Figure 3 For example, when the block 2212 and the transmission block 2211 are snap-fitted, a support point is provided for the handle 2241, which offsets the reset force applied by the handle reset torsion spring 2242 to the handle 2241, so as to maintain the handle 2241 in the closed position. Figure 6 As shown, when the block 2212 is disengaged from the transmission block 2211, the handle 2241 loses its support point and rotates to the opening position under the reset force applied by the handle reset torsion spring 2242, as shown in FIG. Figure 3 , 6 shown.

[0079] In practical applications, in order to ensure that the moving contact and the static contact can be in close contact when closing the switch to ensure the stability of the circuit connection, the contact point between the two must have a certain contact pressure. Usually, two positions are set, wherein the position of the component when the moving contact and the static contact just come into contact is set to the first position, and the position of the component when the moving contact further applies contact pressure to the static contact is set to the second position. Based on the transmission relationship, the rotation angles of the handle in the above two positions are different, such as Figure 6 (b) and (c). In the related art, a pre-stressed spring is usually provided in the moving contact assembly. When the handle moves from the first position to the second position (i.e., the closing position), the contact pressure between the moving contact and the stationary contact is applied by the pre-stressed spring. However, it involves many parts and components, and the transmission relationship is complicated. It is easy for parts to get stuck. In addition, when the pre-stressed spring metal is fatigued, it is easy to fail and the contact point between the moving contact and the stationary contact lacks contact pressure, which affects the stability of the circuit when the switch is closed. In order to solve the above problems, the present application eliminates the moving contact assembly with a detachable single-side structure. For ease of understanding, refer to Figure 6 The closing process of the circuit breaker is described, where: Figure 6 (a) to (c) are schematic diagrams of the closing process. Figure 6 (d) Figure 6 (b) Schematic diagram of the local structure in the state (contact seat and other components are omitted), Figure 6 (e) Figure 6 (d) A magnified view of the local structure of area B. Figure 6 (f) is in Figure 6 (c) A magnified view of the local structure of area B in the closed state. The specific closing process is as follows:

[0080] When the circuit breaker 100 is in the open position, the states of the components are as follows: Figure 6 (a), the user closes the handle 2241.

[0081] When the handle 2241 rotates clockwise, the transmission block 2211, the moving contact 2221 and the contact seat 2222 are driven to move to the first position through the transmission rod 2214. Figure 6 As shown in (b) to (e), at this time, the moving contact 2221 interferes with the stationary contact, and the moving contact 2221 cannot be pressed further. Figure 6 (d) As shown; the opening connecting portion 2221a of the moving contact 2221 and the limiting member 2222a are still in the abutting position as shown Figure 6 (e) as shown.

[0082] The present application realizes the unilateral structure detachable by setting the movable contact assembly when the unilateral structure is separated through the opening connecting portion 2221a of the movable contact 2221 and the limiting member 2222a, and the handle drives the contact seat 2222 to move to the second position through the transmission rod 2214. Figure 6As shown in (c), at this time, the contact seat 2222 drives the moving contact 2221 to move upward away from the side of the static contact through the connecting piece 2222d, and the moving contact applies contact pressure to the static contact under the action of the tension spring 223, and the force of the tension spring 223 pulling further downward is offset by the snap fit between the transmission block 2211 and the clamping block. At this time, the open connection portion 2221a is separated from the limiting piece 2222a as shown in FIG. Figure 6 (f) is an enlarged view of the local structure of area B.

[0083] In this embodiment, closing transmission is achieved through the cooperation between the open connecting part 2221a, the limit piece 2222a, the transmission block 2211 and the clamping block 2212. The contact pressure between the moving contact and the static contact is applied by the tension spring, thereby eliminating the preload spring part, reducing the failure points and improving the overall performance.

[0084] It can be understood that when the blocking block 2212 is disengaged from the transmission block 2211, the tension spring 223 further pulls down the moving contact 2221, and the moving contact 2221 drives the contact seat 2222 to move to the opening position through the limiting member 2222a and the connecting member 2222d. At this time, the opening connecting part 2221a abuts against the limiting member, and the moving contact 2221 is in a limited state.

[0085] The control mainboard 10 of this embodiment is connected to the opening drive module 21 for communication, and is used to control the opening drive module 21 to drive the card block 2212. The card block 2212 is separated from the transmission block 2211 under the opening force generated by the opening drive module 21, and the restriction on the moving contact assembly 222 is released in the tripped state, and the moving contact assembly 222 performs the opening operation. In this embodiment, the opening drive module 21 directly acts on the card block 2212, which simplifies the driving opening transmission process and ensures the timeliness and reliability of the opening operation.

[0086] Optionally, the opening drive module 21 includes an actuator 211 and a tripping toggle assembly 212, and the tripping toggle assembly 212 is rotatably disposed on the motion path of the actuator 211;

[0087] The control mainboard 10 controls the actuator 211 to push the tripping toggle assembly 212 to rotate according to the set threshold value or the tripping instruction, and the tripping toggle assembly 212 pushes the clamping block 2212 to separate from the transmission block 2211 .

[0088] Specifically, the actuator 211 may be a solenoid or other push-type components. When the solenoid is pushed out, it pushes the release toggle assembly 212 to release the clamping block 2212 from the transmission block 2211 .

[0089] Optionally, the trip toggle assembly 212 includes a trip toggle block 2121 and a toggle block reset torsion spring 2122; the trip toggle block 2121 can be rotatably arranged, and the toggle block reset torsion spring 2122 is transmission-connected to the trip toggle block 2121. After the actuator 211 is reset, the trip toggle block 2121 is reset under the elastic force of the toggle block reset torsion spring 2122.

[0090] For ease of understanding, refer to Figure 7-8 The opening process of the circuit breaker is described, wherein the actuator 211 is a push-type solenoid as an example. Figure 7 (a) The positions of the components when the circuit breaker is in the closed state. At this time, the solenoid is not pushed out, the tripping toggle block 2121 and the clamping block 2212 abut against each other, and the corners of the clamping block 2212 and the corners of the transmission block 2211 are snap-fitted with each other, offsetting the tension of the tension spring 223 on the moving contact assembly 222. Figure 7 (b) The control main board 10 drives the solenoid to operate after receiving the trip command or reaching the corresponding threshold value. The ejector rod 2111 of the solenoid pushes the tripping toggle block 2121 to rotate, and the tripping toggle block 2121 starts to push the clamping block 2212. Figure 7 (c) and Figure 8 The top rod 2111 of the solenoid just moves to the target position, that is, the open position. At this time, the corners of the block 2212 are just separated from the corners of the transmission block 2211, the block 2212 is disengaged from the transmission block 2211, the transmission block 2211 loses its force point, and the restriction on the moving contact assembly 222 is released. The moving contact assembly 222 is driven by the tension spring 223 to complete the opening, that is, the moving contact is separated from the static contact, and the handle 2241 also loses its supporting force and moves to the opening position under the action of the handle reset spring 226b. Figure 7 As shown in (d), the top rod 2111 of the solenoid is retracted, the tripping toggle block 2121 is reset under the action of the toggle block reset torsion spring 2122, and the clamping block 2212 is restored to abutment with the transmission block 2211 under the reset action force of the clamping block reset spring rod 2213.

[0091] In addition to realizing the circuit protection function through remote opening and closing and manual opening and closing, the circuit breaker 100 of the present application can include one or more intelligent modules to realize the detection function of parameters such as voltage, current and temperature and the power consumption recording function. The following describes each intelligent module.

[0092] In actual applications, when a line is severely overloaded, the current in the circuit increases, but the magnetic field generated by the increased current is insufficient to move the iron core in the coil. Therefore, the short-circuit protection module does not work under overload conditions. To avoid the above problems, the circuit breaker 100 of this embodiment further includes an overload protection module 23, which is transmission-connected to the latch assembly 221, and is used to generate a tripping force on the latch assembly 221 through the overload protection module 23 when the circuit is overloaded.

[0093] Reference Figure 3 The circuit breaker 100 includes an overload protection module 23 including a bimetallic strip 231 and an overload pull rod 232; the bimetallic strip is connected to the main circuit. When the circuit is overloaded, the bimetallic strip 231 is heated and bends upward to push the overload pull rod 232, and the overload pull rod 232 generates a tripping force on the buckle assembly 221.

[0094] Optionally, the overload pull rod 232 is a pull rod bent at a certain angle, one end of the overload pull rod 232 is transmission connected to the bimetallic strip 231, and the other end of the overload pull rod 232 is transmission connected to the second contact portion of the clamping block 2212. When the current is overloaded, the bimetallic strip 231 bends, driving the overload pull rod 232 to pull the clamping block 2212 and the transmission block 2211 to disengage, thereby releasing the restriction on the moving contact assembly. The moving contact 2221 performs a tripping operation under the tension of the tension spring 223, so that the moving contact assembly is tripped.

[0095] The angle of the overload pull rod 232 can be set to 150 degrees to 160 degrees, or other appropriate angles.

[0096] The circuit breaker 100 includes a short-circuit protection module 24, which is transmission-connected to the buckle assembly 221, and is used to generate a tripping force on the buckle assembly 221 when the circuit is short-circuited.

[0097] Specifically, the short circuit protection module 24 includes an electromagnetic coil, an iron core and a tension elastic member, the iron core is movably arranged in the electromagnetic wire, and the iron core and the tension elastic member are transmission-connected;

[0098] When the circuit is short-circuited, the magnetic force of the electromagnetic coil is greater than the tension of the tension elastic member. The iron core hits the block 2212 under the action of the magnetic force, and the block 2212 is disengaged from the transmission block 2211. The transmission block 2211 loses its force point, and the moving contact 2221 opens under the action of the tension spring 223. The handle 2241 also loses its supporting force and moves to the open position under the action of the handle reset spring 226b.

[0099] Specifically, the block 2212 may be of an irregular shape, such as Figure 3The shown block 2212 has contact parts with the tripping toggle block 2121, the overload connecting rod 232 and the short-circuit protection module 24 respectively. Any of the above components can apply a tripping force to the block 2212 to meet the opening requirements in various situations, simplify the opening structure and transmission relationship, improve the opening success rate, and facilitate assembly.

[0100] Optionally, the circuit breaker 100 also includes a zero-sequence current transformer 25, which is communicated with the control main board 10 and is used to detect the leakage induced current. When the leakage induced current exceeds a preset current threshold, the control main board 10 controls the opening drive module 21 to drive the latch assembly 221 to perform an opening operation.

[0101] When leakage occurs in the main circuit, the currents in the cables passing through the zero-sequence current transformer will be unequal, causing the induced electromotive force generated in the zero-sequence current transformer to generate an induced current which is received by the control mainboard 10. The control mainboard 10 then drives the solenoid, which triggers the opening release mechanism of the main switch, causing the circuit breaker to trip and completing the leakage protection function.

[0102] Optionally, the circuit breaker 100 also includes an overvoltage and undervoltage protection module, which is communicated with the control main board 10 and is used to collect the voltage at the output terminal of the circuit breaker 100. When the voltage at the output terminal triggers the overvoltage and undervoltage protection, the control main board 10 controls the opening drive module 21 to drive the latch assembly 221 to perform the opening operation.

[0103] Specifically, by connecting two cables in parallel in the two main circuits at the outlet end of the circuit breaker to collect voltage, it can be determined whether there is overvoltage or undervoltage in the main circuit through the collected voltage, if overvoltage or undervoltage occurs.

[0104] Optionally, the circuit breaker 100 also includes a current transformer 26, which is communicatively connected to the control main board 10 and is used to collect the main circuit induced current of the circuit breaker 100. The control main board 10 determines the current power consumption based on the main circuit induced current and the output terminal voltage, and when the current power consumption exceeds the limited power consumption, controls the opening drive module 21 to drive the latch assembly 221 to perform the opening operation.

[0105] Specifically, the main circuit cable is passed through the current transformer 26. When current flows through the main circuit, the current transformer 26 will generate an induced current. If the control motherboard 10 calculates the real current value based on the ratio of the induced current of the current transformer 26 to the actual current, the control motherboard 10 can complete the power consumption calculation of this main circuit based on the voltage and current data obtained through the collection, and can set the power consumption limit of the main circuit to achieve power consumption limitation.

[0106] Optionally, the circuit breaker 100 also includes an arc extinguishing module 27, which is a key part for extinguishing the arc when disconnecting the circuit to prevent the arc from continuing to burn. The arc extinguishing module is composed of arc grids, arc covers and other components, and achieves the arc extinguishing effect by stretching, segmenting and cooling the arc.

[0107] Through the above arrangement, in this embodiment, the structural parts of the entire circuit breaker are closely arranged, making the space compact, reducing the overall volume, simplifying the corresponding transmission components, reducing the possible failure points due to component jamming, and providing a tripping drive module, an overload protection module, and a short-circuit protection module to realize the tripping of the transmission block and the card block in different scenarios. The control main board communicates with the intelligent module and can drive the tripping drive module in scenarios such as over-voltage and under-voltage protection, power consumption limitation, and leakage protection, thereby increasing the overall performance, improving the tripping success rate, and reducing safety hazards.

[0108] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A circuit breaker, characterized in that: include: A circuit breaker body with a control mainboard and a built-in opening drive module, wherein the circuit breaker body comprises an opening and closing mechanism, wherein the opening and closing mechanism comprises a latch assembly, a moving contact assembly and a tension spring, and the single-side structure of the moving contact assembly is detachable; The moving contact assembly is respectively connected to the buckle assembly and the tension spring in a transmission manner, and the opening drive module is connected to the buckle assembly in a transmission manner; The buckle assembly, in the mating state, offsets the opening force applied by the tension spring to the moving contact assembly, restricting the moving contact assembly from performing an opening operation. When the moving contact assembly is in the closing position, the single-side structure of the moving contact assembly is separated; The control main board is communicatively connected with the opening drive module, and is used to control the opening drive module to drive the latch assembly to be disengaged. The latch assembly releases the restriction on the moving contact assembly in the disengaged state, and the moving contact assembly performs an opening operation under the tension of the tension spring.

2. The circuit breaker according to claim 1, characterized in that: The moving contact assembly comprises a moving contact and a contact seat, wherein the moving contact is arranged in a receiving groove of the contact seat, one side of the moving contact is rotatably connected to the contact seat, and the other side of the moving contact is detachably connected to the contact seat; The tension spring is transmission-connected to the moving contact, and the buckle assembly is rotationally connected to the contact seat; When the switch is closed, the moving contact is separated from the single-side structure of the contact seat.

3. The circuit breaker according to claim 2, characterized in that: The moving contact is provided with an open connection portion, and the contact seat is detachably connected to the open connection portion via a limiting member; When the switch is closed, the open connection portion is separated from the limiting member.

4. The circuit breaker according to claim 1, characterized in that: The switch-off driving module comprises: an actuator and a tripping toggle assembly, wherein the tripping toggle assembly is rotatably arranged on a motion path of the actuator; The control mainboard controls the actuator to drive the tripping toggle assembly to rotate according to a set threshold value or a tripping instruction, and the tripping toggle assembly drives the buckle assembly to trip.

5. The circuit breaker according to claim 4, characterized in that: The trip toggle assembly comprises a trip toggle block and a toggle block reset torsion spring; The tripping toggle block is rotatably arranged, and the toggle block reset torsion spring is transmission-connected with the tripping toggle block. After the actuator is reset, the tripping toggle block is reset under the elastic force of the toggle block reset torsion spring.

6. The circuit breaker according to claim 1, characterized in that: The buckle assembly includes a transmission block and a clamping block; The transmission block is transmission-connected with the moving contact assembly, the clamping block is rotationally connected with the moving contact assembly, and the clamping block is transmission-connected with the opening drive module; When in the closing position, the clamping block and the transmission block are snap-fitted, and the clamping block and the transmission block restrict the moving contact assembly from performing an opening operation in the matching state; Under the drive of the opening drive module, the clamping block is separated from the transmission block, and the restriction on the moving contact assembly is released in the tripped state, and the moving contact assembly performs an opening operation.

7. The circuit breaker according to claim 6, characterized in that: The buckle assembly also includes: a card block reset spring rod; One end of the card block reset spring rod is connected to the card block, and the other end of the card block reset spring rod is connected to the transmission block. The card block is reset under the elastic force of the card block reset spring rod, and the card block and the transmission block resume the buckle fit.

8. The circuit breaker according to claim 6, characterized in that: The buckle assembly further includes a transmission rod, and the opening and closing mechanism further includes a handle assembly; The handle assembly is transmission-connected to the transmission block via a transmission rod.

9. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises an overload protection module, which is transmission-connected to the buckle assembly and is used to generate a tripping force on the buckle assembly when the circuit is overloaded.

10. The circuit breaker according to claim 9, characterized in that The overload protection module includes a bimetallic strip and an overload pull rod; The overload pull rod is transmission-connected with the buckle assembly; When the circuit is overloaded, the bimetallic strip is bent by heat to push the overload pull rod, and the overload pull rod generates a tripping force on the buckle assembly.

11. The circuit breaker according to claim 1, characterized in that: The circuit breaker further comprises a short circuit protection module, which is transmission-connected to the buckle assembly and is used to generate a tripping force on the buckle assembly when a circuit is short-circuited.

12. The circuit breaker according to claim 1, characterized in that The circuit breaker also includes a zero-sequence current transformer, which is communicatively connected to the control main board and is used to detect leakage induced current. When the leakage induced current exceeds a preset current threshold, the control main board controls the opening drive module to drive the latch assembly so that the moving contact assembly performs an opening operation.

13. The circuit breaker according to claim 1, characterized in that The circuit breaker also includes an overvoltage and undervoltage protection module, which is communicatively connected to the control main board and is used to collect the voltage at the output terminal of the circuit breaker. When the voltage at the output terminal triggers the overvoltage and undervoltage protection, the control main board controls the opening drive module to drive the latch assembly so that the moving contact assembly performs an opening operation.

14. The circuit breaker according to claim 13, characterized in that The circuit breaker also includes a current transformer, which is communicatively connected to the control main board and is used to collect the main circuit induced current of the circuit breaker. The control main board determines the current power consumption according to the main circuit induced current and the output terminal voltage, and when the current power consumption exceeds the limited power consumption, controls the opening drive module to drive the latch assembly so that the moving contact assembly performs an opening operation.

15. The circuit breaker according to claim 1, characterized in that The circuit breaker further comprises an arc extinguishing module, and the arc extinguishing module is used for extinguishing the arc when the moving contact assembly breaks the circuit.

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