Automatic actuator for circuit breaker

Abstract

The present invention discloses an automatic actuator for a circuit breaker, which relates to the technical field of circuit breakers and includes a circuit breaker body and an actuator body. An operating handle is installed on the circuit breaker body, and the actuator body includes a front shell and a rear shell. An identification mechanism is installed on the rear shell for distinguishing whether the circuit breaker body is in a manual tripping state or a fault tripping state. The present invention is connected to the circuit breaker body by setting an identification mechanism, and according to the mechanical action of the identification mechanism and the closing and opening state of the operating handle, it can judge whether the actuator body is in a manual tripping state or a fault tripping state when the actuator body is powered on or off, so as to facilitate the actuator body to make the next judgment and facilitate maintenance personnel to carry out maintenance, saving time and effort, and being highly intelligent. In addition, through the provided gear set, motor, and communication port, the closing and opening of the circuit breaker body can be remotely controlled, saving time and energy of maintenance personnel, and realizing unified centralized supervision and control.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and more particularly, to an automatic actuator for a circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions and can close, carry and interrupt current under abnormal circuit conditions within a specified time.

[0003] The existing Chinese invention patent with publication number CN107039214A discloses a reclosing circuit breaker that automatically detects faults after tripping and has a liquid crystal display; it includes an execution closing part and a leakage execution part. The present invention overcomes the problem that traditional circuit breakers require professional personnel to check the fault before continuing to supply power after a fault trip. If the existing reclosing circuit breaker is used, the circuit breaker will be closed when the fault still exists, causing secondary damage to people and equipment. The technology of the present invention can detect whether the fault still exists after a fault trip when the output end is not powered. If the fault still exists, the circuit breaker remains in the open state. After a period of time, the test is performed again, and then the test is performed regularly, such as once a day. If the fault is eliminated, the circuit breaker is closed and power is restored. This does not require professional personnel to perform maintenance, saves a lot of manpower and material resources, and can restore power in the fastest time, reducing economic losses.

[0004] However, these circuit breakers, as well as most circuit breakers currently on the market, lack a mechanical output to distinguish between manual tripping and automatic tripping. Specifically, they lack an electronic signal output to distinguish whether the circuit breaker was manually tripped or tripped. This design makes it difficult to provide an accurate signal input to the actuator unit, making it impossible to determine whether the circuit breaker was manually tripped or automatically tripped. Therefore, there is room for improvement. Summary of the Invention

[0005] In order to solve this problem in practical application, the present invention aims to provide an automatic actuator for a circuit breaker. The specific solution is as follows:

[0006] An automatic actuator for a circuit breaker comprises a circuit breaker body and an actuator body, wherein an operating handle is mounted on the circuit breaker body, and the actuator body comprises a front housing and a rear housing, wherein an actuator handle, a gear set, and a motor are mounted on the front housing and are transmission-connected to each other, wherein the actuator handle is transmission-connected to the operating handle, and an identification mechanism is mounted on the rear housing for distinguishing whether the circuit breaker body is in a manual trip state or a fault trip state.

[0007] Further preferably, the identification mechanism includes a fault transmission module, a handle transmission module, a limit module, and a fault indication module, wherein the fault transmission module cooperates with the handle transmission module to identify that the actuator body is in a manual tripping state or that the actuator body is in a fault tripping state after tripping due to a current fault;

[0008] When the circuit breaker body is in a closed normal working state, the handle transmission module is in contact with the fault transmission module and the limit module respectively, and the indication signal of the fault indication module is normal;

[0009] When the actuator body is manually driven to open by the circuit breaker body and is in a manual opening state, the handle transmission module is separated from the limit module, the limit module abuts against the fault transmission module, and the indication signal of the fault indication module is normal;

[0010] When the actuator body is driven by the circuit breaker body to trip due to a current fault and is in a fault-tripping state, the fault transmission module abuts against the fault indication module, and the indication signal of the fault indication module is a fault.

[0011] Further preferably, the handle transmission module includes a transmission handle, a hook ring, and a first fixed rod, the first fixed rod is installed on the rear shell, the transmission handle is rotatably sleeved on the first fixed rod, the hook ring is hinged on the transmission handle, and the transmission handle is transmission-connected to the execution handle.

[0012] Further preferably, the fault transmission module includes a fault energy storage component, a central bracket, a locking component, a fault driving component, and a second fixed rod, wherein the second fixed rod is mounted on the rear housing, the fault energy storage component, the central bracket, the locking component, and the fault driving component are rotatably sleeved on the second fixed rod, a first elastic reset component is abutted between the central bracket and the rear housing, a second elastic reset component is sleeved on the second fixed rod, and the central bracket, the locking component, and the fault driving component are all synchronously connected to the second elastic reset component in transmission;

[0013] The locking member can be locked in the hook ring, and the fault driving member is transmission-connected to the fault structure of the circuit breaker body.

[0014] Further preferably, the limiting module includes a limiting member and a third fixing rod, the third fixing rod is mounted on the rear housing, a third elastic return member is sleeved on the third fixing rod, and the limiting member is rotatably sleeved on the third fixing rod and is in transmission connection with the third elastic return member;

[0015] The limiting component can abut against the transmission handle or the fault energy storage component.

[0016] Further preferably, the fault indication module includes a fault visual indicator and a fourth fixing rod, the fourth fixing rod is mounted on the rear housing, a fourth elastic reset member is sleeved on the fourth fixing rod, and the fault visual indicator is rotatably sleeved on the fourth fixing rod and is in transmission connection with the fourth elastic reset member;

[0017] The fault visual indicator may abut against the fault energy storage component.

[0018] Further preferably, a fifth fixing rod is installed on the rear housing, and the fault visual indicator can abut against the fifth fixing rod;

[0019] When the fault visual indicator contacts the fifth fixing rod, the indication signal of the fault visual indicator is normal.

[0020] Further preferably, an observation window for displaying the indication signal is provided on the rear housing.

[0021] Further preferably, a transmission groove is provided on a side of the execution handle close to the rear shell, and a transmission rod is provided on a side of the transmission handle close to the front shell, and the transmission rod is inserted into the transmission groove.

[0022] Further preferably, a through slot for the fault driving component to pass through is provided on the front shell.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides an identification mechanism that is transmission-connected to the circuit breaker body. Based on the mechanical action of the identification mechanism and the closing and opening states of the operating handle, the actuator body can be judged, when the actuator body is powered on or off, as to whether it is in a state after manual tripping (manual tripping state) or a state after the circuit breaker body trips due to an overcurrent fault (fault tripping state). This facilitates the internal IC chip of the actuator body to determine whether the next step should be closing or maintaining the open state. It also facilitates maintenance personnel to determine whether the circuit breaker body was manually tripped or tripped due to an overcurrent, facilitating maintenance, saving time and effort, and being highly intelligent. Furthermore, through the provision of a gear set and motor, as well as the externally accessible communication port connected to a communication device, the circuit breaker body can be remotely controlled to close and open the circuit breaker body, effectively saving time and energy traveling back and forth between the equipment location and the maintenance personnel's location, and achieving unified centralized supervision and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an overall schematic diagram of an embodiment of the present invention;

[0026] Figure 2 To show the overall schematic diagram of the front shell;

[0027] Figure 3 A schematic diagram showing the overall structure of the rear housing;

[0028] Figure 4 This is a schematic diagram showing the circuit breaker body in normal working condition;

[0029] Figure 5 A first schematic diagram showing the circuit breaker body in a manual opening state;

[0030] Figure 6 A second schematic diagram showing the circuit breaker body in a manually opened state;

[0031] Figure 7 For display Figure 6 Position relationship diagram of the fault energy storage component and the limit component;

[0032] Figure 8 A first schematic diagram showing a circuit breaker body in a fault-tripped state;

[0033] Figure 9 A second schematic diagram showing the circuit breaker body in a fault-tripped state;

[0034] Figure 10 A third schematic diagram showing the circuit breaker body in a fault-tripped state;

[0035] Figure 11 A fourth schematic diagram showing the circuit breaker body in a fault-tripped state;

[0036] Figure 12 The fifth schematic diagram shows the circuit breaker body in a fault tripping state.

[0037] Reference numerals: 1, circuit breaker body; 101, operating handle; 2, actuator body; 201, front housing; 2011, actuator handle; 20111, transmission slot; 2012, gear set; 2013, motor; 202, rear housing; 2021, fault transmission module; 20211, fault energy storage component; 20212, center bracket; 20213, locking component; 20214, fault driving component; 20215, second fixing rod; 20216, first elastic return component; 20217, second elastic return component; 2 022. Handle transmission module; 20221. Transmission handle; 202211. Transmission rod; 20222. Hook ring; 20223. First fixed rod; 2023. Limit module; 20231. Limit member; 20232. Third fixed rod; 20233. Third elastic return member; 2024. Fault indication module; 20241. Fault visual indicator; 20242. Fourth fixed rod; 20243. Fourth elastic return member; 2025. Fifth fixed rod; 2026. Observation window; 2027. Through slot. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0039] like Figure 1 As shown, an automatic actuator for a circuit breaker includes a circuit breaker body 1 and an actuator body 2 for controlling the circuit breaker body 1 to automatically close and open the circuit breaker. Figure 2 and Figure 3 As shown, an operating handle 101 for controlling the closing and opening of the drive circuit is installed on the circuit breaker body 1. The actuator body 2 includes a front housing 201 and a rear housing 202. Among them, an actuator handle 2011, a gear set 2012, and a motor 2013 are installed on the front housing 201, and the actuator handle 2011 is in transmission connection with the operating handle 101. In this embodiment, preferably, a communication port is provided on the circuit breaker body 1. By connecting a communication device to the communication port, the circuit breaker body 1 can be remotely controlled to close the circuit breaker body 1 and control the opening of the circuit breaker body 1, effectively saving time and energy for traveling back and forth between the location of the equipment and the location of the maintenance personnel, and realizing unified centralized supervision and control. (For detailed functions here, please refer to the Chinese invention patent with publication number CN205752060U, entitled A Multifunctional Circuit Breaker)

[0040] like Figure 4As shown, an identification mechanism for distinguishing between the manual trip state and the fault trip state of the circuit breaker body 1 is installed on the rear housing 202. Specifically, the identification mechanism includes a fault transmission module 2021, a handle transmission module 2022, a limit module 2023, and a fault indication module 2024. The fault transmission module 2021 is used to identify the fault trip state of the circuit breaker body 1, and the handle transmission module 2022 is used to identify the manual trip state of the circuit breaker body 1.

[0041] Combine Figure 5 As shown, the handle transmission module 2022 includes a transmission handle 20221, a hook ring 20222, and a first fixing rod 20223. The first fixing rod 20223 is installed on the rear housing 202, the transmission handle 20221 is rotatably sleeved on the first fixing rod 20223, and the hook ring 20222 is hinged to the transmission handle 20221. At the same time, a transmission groove 20111 ( Figure 2 ), a transmission rod 202211 is provided on the side of the transmission handle 20221 near the front housing 201. When the front cover and rear cover are combined, the transmission rod 202211 is inserted into the transmission slot 20111, thereby connecting the transmission handle 20221 to the actuating handle 2011. Closing and opening operations of the operating handle 101 can sequentially drive the actuating handle 2011 and the transmission handle 20221 to rotate.

[0042] The fault transmission module 2021 includes a fault energy storage component 20211, a central bracket 20212, a locking component 20213, a fault driving component 20214, and a second fixed rod 20215. The second fixed rod 20215 is installed on the rear shell 202, and the fault energy storage component 20211, the central bracket 20212, the locking component 20213, and the fault driving component 20214 are rotated and sleeved on the second fixed rod 20215 in sequence, and a first elastic reset component 20216 is abutted between the central bracket 20212 and the rear shell 202, and a second elastic reset component 20217 is sleeved on the second fixed rod 20215. Among them, the central bracket 20212, the locking component 20213, and the fault driving component 20214 are all synchronously connected to the second elastic reset component 20217 in transmission. At the same time, a through slot 2027 ( Figure 3), when the front cover and rear cover are combined and installed with the circuit breaker body 1, the fault driver 20214 extends through the through slot 2027 and is in transmission connection with the fault structure of the circuit breaker body 1. It can be seen that when a fault occurs within the circuit breaker body 1, the internal fault structure can sequentially drive the fault driver 20214, the center bracket 20212, the locking member 20213, and the second elastic return member 20217 to rotate. (The fault structure within the circuit breaker body 1 is well known in the art. In this embodiment, only the fault structure and the fault driver 20214 need to be in transmission connection. This is easily achievable by those skilled in the art and will not be described in detail.)

[0043] The limiting module 2023 includes a limiting member 20231 and a third fixing rod 20232. The third fixing rod 20232 is installed on the rear shell 202. The third elastic return member 20233 is sleeved on the third fixing rod 20232. The limiting member 20231 is rotatably sleeved on the third fixing rod 20232 and is transmission-connected to the third elastic return member 20233.

[0044] The fault indication module 2024 includes a fault visual indicator 20241 and a fourth fixing rod 20242. The fourth fixing rod 20242 is mounted on the rear housing 202. A fourth elastic return member 20243 is sleeved on the fourth fixing rod 20242. The fault visual indicator 20241 is rotatably sleeved on the fourth fixing rod 20242 and is in transmission connection with the fourth elastic return member 20243. An observation window 2026 ( Figure 2 In this embodiment, the indicator signal is set to red and white, white represents normal working state or manual trip state, and red represents fault trip state.

[0045] Furthermore, a fifth fixing rod 2025 is mounted on the rear housing 202 and can abut against the fault visual indicator 20241 .

[0046] like Figure 4 As shown, when the circuit breaker body 1 is in normal working condition, the first elastic reset member 20216 and the third elastic reset member 20233 are in a state of storing elastic potential energy, while the second elastic reset member 20217 and the fourth elastic reset member 20243 are in a normal extended state. At this time, the transmission handle 20221 abuts the limit member 20231, the locking member 20213 is engaged within the hook ring 20222, and there is no abutment between the fault transmission module 2021, the limit module 2023, and the fault indication module 2024. Simultaneously, the fault visual indicator 20241 abuts the fifth fixing rod 2025, the indicator signal in the observation window 2026 is white, and the operating handle 101 is in the closed state, indicating normal working condition.

[0047] Combine Figure 5 and Figure 6 As shown, when the circuit breaker body 1 is in the manual opening state, the first elastic reset member 20216 is in the state of storing elastic potential energy, and the second elastic reset member 20217, the third elastic reset member 20233, and the fourth elastic reset member 20243 are in the normal extended state. At this time, due to manual opening, the handle 2011 is first rotated to drive the transmission handle 20221 to rotate, and then the hook ring 20222 is used to drive the lock member 20213 to rotate to drive the center bracket 20212 and the fault drive rod to rotate to drive the circuit breaker body 1 to perform the opening operation. Figure 7 As shown, the third elastic reset member 20233 recovers its elastic potential energy and rotates against the faulty energy storage member 20211, preventing the faulty energy storage member 20211 from rotating. At the same time, the fault visual indicator 20241 has no driving force and continues to abut against the fifth fixing rod 2025. The indicator signal in the observation window 2026 is white, and the operating handle 101 is in the open state, i.e., the manual open state.

[0048] Combine Figure 8 and Figure 9 As shown, when the circuit breaker body 1 is in a fault-tripped state, the first elastic reset member 20216 and the second elastic reset member 20217 are in a normally extended state, and the third elastic reset member 20233 and the fourth elastic reset member 20243 are in a state of storing elastic potential energy. At this time, due to the fault trip, the fault structure first drives the fault drive rod to rotate, thereby driving the center bracket 20212 and the locking member 20213 to rotate, causing the locking member 20213 to disengage from the hook ring 20222. The fault energy storage member 20211 is then driven by the first elastic reset member 20216 to rotate without limit until it abuts against the fault visual indicator 20241, thereby rotating the fault visual indicator 20241.

[0049] Combine Figure 10 and Figure 11 As shown, after the fault trip, the operating handle 101, the execution handle 2011, and the transmission handle 20221 are driven to rotate. The working process of the transmission handle 20221 at this time is the same as the above Figure 5 、 Figure 6 The locking member 20213 is locked in the hook ring 20222. At this time, the fault visual indicator 20241 is driven to rotate by the fault energy storage member 20211 and is no longer in contact with the fifth fixing rod 2025. The indicator signal in the observation window 2026 is red, and the operating handle 101 is in the open state, that is, the fault open state.

[0050] like Figure 12As shown, after the fault is tripped and maintenance is complete, the circuit breaker body 1 needs to be closed manually or automatically. The actuator handle 2011 and the transmission handle 20221 are rotated, causing the transmission handle 20221 to abut against the limiter 20231, removing the limiter 20231's restraining effect on the faulty energy storage component 20211. The hook ring 20222 and the fault structure then reset the faulty transmission module 2021. At this point, the fault visual indicator 20241 rotates to abut against the fifth fixing rod 2025, the indicator signal in the observation window 2026 turns white, and the operating handle 101 is in the closed state, indicating normal operation.

[0051] The present invention provides an identification mechanism in transmission connection with the circuit breaker body 1. Based on the identification mechanism's indication signal and the closing / opening state of the operating handle 101, the circuit breaker body 1 is judged to be in a manually opened state or a fault-opened state. This facilitates maintenance personnel in determining whether a circuit breaker fault is real or not, facilitating maintenance, saving time and effort, and achieving high intelligence. Furthermore, the gear set 2012 and motor 2013 enable the circuit breaker body 1 to be automatically closed or opened remotely, effectively saving the time and cost of manual closing and opening.

[0052] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An automatic actuator for a circuit breaker, comprising a circuit breaker body (1) and an actuator body (2), wherein an operating handle (101) is mounted on the circuit breaker body (1), and the actuator body (2) comprises a front housing (201) and a rear housing (202), wherein an actuator handle (211), a gear set (212), and a motor (213) are mounted on the front housing (201), and the actuator handle (211) is in transmission connection with the operating handle (101), and is characterized in that: The rear housing (202) is provided with an identification mechanism for distinguishing whether the circuit breaker body (1) is in a manual tripping state or a fault tripping state; The identification mechanism comprises a fault transmission module (2021), a handle transmission module (2022), a limit module (2023), and a fault indication module (2024); the fault transmission module (221) and the handle transmission module (2022) cooperate to work to identify whether the actuator body (2) is in a manual tripping state or whether the actuator body (2) is in a fault tripping state after tripping due to a current fault; When the circuit breaker body (1) is in a closed normal working state, the handle transmission module (2022) abuts against the fault transmission module (2021) and the limit module (2023), respectively, and the indication signal of the fault indication module (2024) is normal; When the actuator body (2) is in a manual opening state due to the manual opening drive of the circuit breaker body (1), the handle transmission module (2022) is separated from the limit module (2023), the limit module (2023) abuts against the fault transmission module (2021), and the indication signal of the fault indication module (2024) is normal; When the actuator body (2) is driven to be in a fault tripping state due to a current fault in the circuit breaker body (1), the fault transmission module (2021) abuts against the fault indication module (2024), and the indication signal of the fault indication module (2024) is a fault; The handle transmission module (2022) comprises a transmission handle (20221), a hook ring (20222), and a first fixing rod (20223); the first fixing rod (20223) is mounted on the rear housing (202); the transmission handle (20221) is rotatably sleeved on the first fixing rod (20223); the hook ring (20222) is hinged to the transmission handle (20221), and the transmission handle (20221) is transmission-connected to the execution handle (2011); The fault transmission module (2021) includes a fault energy storage component (20211), a central bracket (20212), a locking component (20213), a fault driving component (20214), and a second fixing rod (20215). The second fixing rod (20215) is installed on the rear shell (202). The fault energy storage component (20211), the central bracket (20212), the locking component (20213), the fault driving component (20214) The central support (20212) is movably sleeved on the second fixing rod (20215); a first elastic reset member (20216) is provided between the central support (20212) and the rear shell (202); a second elastic reset member (20217) is sleeved on the second fixing rod (20215); and the central support (20212), the locking member (20213), and the fault driving member (20214) are all synchronously connected to the second elastic reset member (20217); The locking member (20213) can be locked in the hook ring (20222), and the fault driving member (20214) is in transmission connection with the fault structure of the circuit breaker body (1).

2. The automatic actuator for a circuit breaker according to claim 1, wherein: The limiting module (2023) comprises a limiting member (20231) and a third fixing rod (20232), the third fixing rod (20232) being mounted on the rear housing (202), a third elastic reset member (20233) being sleeved on the third fixing rod (20232), and the limiting member (20231) being rotatably sleeved on the third fixing rod (20232) and being transmission-connected to the third elastic reset member (20233); The limiting member (20231) can abut against the transmission handle (20221) or the fault energy storage member (20211).

3. The automatic actuator for a circuit breaker according to claim 1, wherein: The fault indication module (2024) comprises a fault visual indicator (20241) and a fourth fixing rod (20242), wherein the fourth fixing rod (20242) is mounted on the rear housing (202), a fourth elastic reset member (20243) is sleeved on the fourth fixing rod (20242), and the fault visual indicator (20241) is rotatably sleeved on the fourth fixing rod (20242) and is transmission-connected to the fourth elastic reset member (20243); The fault visual indicator (20241) can abut against the fault energy storage component (20211).

4. The automatic actuator for a circuit breaker according to claim 3, characterized in that: A fifth fixing rod (2025) is mounted on the rear housing (202), and the fault visual indicator (20241) can abut against the fifth fixing rod (2025); When the fault visual indicator (20241) abuts against the fifth fixing rod (2025), the indication signal of the fault visual indicator (20241) is normal.

5. The automatic actuator for a circuit breaker according to claim 4, characterized in that: An observation window (2026) for displaying the indication signal is provided on the rear housing (202).

6. The automatic actuator for a circuit breaker according to claim 5, characterized in that: A transmission groove (20111) is provided on a side of the execution handle (2011) close to the rear housing (202), and a transmission rod (202211) is provided on a side of the transmission handle (20221) close to the front housing (201), and the transmission rod (202211) is inserted into the transmission groove (20111).

7. The automatic actuator for a circuit breaker according to claim 6, characterized in that: The front housing (201) is provided with a through slot (2027) for the fault driving member (20214) to pass through.

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