A permanent magnet mechanism self-locking mechanism for an outdoor circuit breaker

Abstract

A permanent magnet mechanism self-locking mechanism for an outdoor circuit breaker, comprising a frame, a permanent magnet mechanism having a moving iron core and a permanent magnet assembly, and the permanent magnet assembly being provided with a semicircular slot; a half shaft partially located in the semicircular slot; an operating handle rotatably arranged outside a housing of the outdoor circuit breaker and fixedly connected with the half shaft; the operating handle having two positions of locking and unlocking; the half shaft having a locking state of relatively rotating and being out of alignment with the semicircular slot to limit resetting of the moving iron core when the operating handle is in the locking position, and an unlocking state of relatively rotating and being in alignment with the semicircular slot to release the limitation on the moving iron core when the operating handle is in the unlocking position. By setting the half shaft for limiting resetting of the moving contact of the permanent magnet mechanism, the operating handle is manually operated to be in the locking position, at this time the permanent magnet mechanism is limited and cannot be operated by remote or external operation by accident, ensuring that the circuit breaker cannot be closed by accident during maintenance, and a safety accident does not occur.

Description

Technical Field

[0001] This utility model relates to the field of outdoor vacuum circuit breakers, specifically to a permanent magnet self-locking mechanism for outdoor circuit breakers. Background Technology

[0002] High-voltage circuit breakers (or high-voltage switches) can not only cut off or close the no-load current and load current in high-voltage circuits, but also cut off overload current and short-circuit current through the action of relay protection devices when a system fault occurs. They have a fairly complete arc-extinguishing structure and sufficient breaking capacity, and can be divided into: oil circuit breakers (multi-oil circuit breakers, low-oil circuit breakers), sulfur hexafluoride circuit breakers (SF6 circuit breakers), compressed air circuit breakers, vacuum circuit breakers, etc.

[0003] As for outdoor circuit breakers, they generally use a permanent magnet mechanism to drive the lever, which in turn disconnects the vacuum pole. In order to ensure maintenance safety, it is necessary to ensure that the permanent magnet mechanism will not be re-closed when it is disconnected. Therefore, a self-locking mechanism needs to be designed to prevent the permanent magnet mechanism from being misoperated. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a permanent magnet mechanism self-locking mechanism for outdoor circuit breakers.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A permanent magnet self-locking mechanism for outdoor circuit breakers, comprising:

[0007] The frame is fixedly installed inside the outdoor circuit breaker housing;

[0008] The permanent magnet mechanism is fixedly supported by a frame. It has a moving iron core and a permanent magnet assembly arranged opposite each other, and the permanent magnet assembly has a semi-circular groove near the moving iron core.

[0009] The half-shaft passes through the frame, and a portion of it rests within the semi-circular groove.

[0010] The operating handle is rotatably mounted on the outside of the outdoor circuit breaker housing and is fixedly connected to the half-shaft. The operating handle has two positions: locked and unlocked.

[0011] The half-shaft has a locked state in which it rotates relative to the semi-circular groove and forms a misalignment with the semi-circular groove to restrict the reset of the moving iron core when the operating handle is in the locked position, and an unlocked state in which it rotates relative to the semi-circular groove to release the restriction on the moving iron core when the operating handle is in the unlocked position.

[0012] A locking mechanism is also provided on the outside of the frame.

[0013] The locking mechanism includes a fixing member fixedly connected to the half shaft, a locking member with one end hinged to the fixing member, a guide groove at the other end of the locking member, and the other end of the locking member being connected to the frame via a pin. The pin is slidably disposed in the guide groove, and a spring is provided between the locking member and the pin.

[0014] The locking member has protrusions on both sides of its front end, and one end of the spring is limited by the protrusions.

[0015] The frame is equipped with a limit switch, and a trigger is provided on one side of the fixing member to activate the limit switch.

[0016] The frame is provided with a limiting member, which has a notch or groove, and the fixing member is placed in the notch or groove.

[0017] The frame includes a rear end cover having a central hole, and the pull rod portion of the permanent magnet mechanism is disposed within the central hole.

[0018] One end of the half-shaft is provided with an indicator, and the outer side of the outdoor circuit breaker housing is provided with an indicator mark corresponding to the indicator.

[0019] The operating handle is equipped with a direction indicator.

[0020] The beneficial effects of this utility model are as follows: By setting a half-shaft for limiting the reset of the moving contact of the permanent magnet mechanism, and using a manual operating handle to lock it in the locked position, the permanent magnet mechanism is restricted from being accidentally operated remotely or externally, ensuring that it will not be accidentally closed during maintenance and thus preventing safety accidents. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention applied to an outdoor circuit breaker.

[0022] Figure 2 This is a cross-sectional view of the present invention (unlocked state).

[0023] Figure 3 This is a cross-sectional schematic diagram of the present invention (in locked state).

[0024] Figure 4 This is a structural diagram of the panel of this utility model (unlocked state).

[0025] Figure 5 This is a schematic diagram of the panel of this utility model (locked state). Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] like Figure 1 As shown, this utility model discloses a self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker, which includes a frame, a permanent magnet mechanism, a half-shaft, and an operating handle. The operating handle can drive the half-shaft to rotate. The permanent magnet mechanism is fixedly connected through the frame, and the half-shaft is inserted into the semi-circular groove of the permanent magnet mechanism. By using the operating handle to drive the half-shaft to rotate, the moving iron core of the permanent magnet mechanism is separated from the permanent magnet assembly.

[0029] The frame 200 is fixedly installed inside the outdoor circuit breaker housing 100. The frame includes a front cover and a rear cover 220 and a guide rod connecting the front and rear covers. The permanent magnet mechanism is fixed between the front and rear covers and is fixedly connected to the front cover. At the same time, a mounting panel is provided on one side of the frame.

[0030] The permanent magnet mechanism 600 is fixedly supported by the frame 200. It has a moving iron core 610 and a permanent magnet assembly 620 arranged opposite to each other. The permanent magnet assembly 620 is provided with a semi-circular groove 621 near the moving iron core 610. The permanent magnet assembly includes a front housing and a permanent magnet disposed in the front housing. The front end of the moving iron core is inserted into the through hole in the center of the permanent magnet. The moving iron core is fixedly connected to the pull rod and can drive the pull rod to move relative to it. At the same time, a rear housing is provided on the rear side of the permanent magnet. The rear housing and the front housing form a relatively complete housing. The rear housing can move closer to or away from the front housing under the action of the moving iron core. Preferably, a semi-circular groove is provided on one side of the front housing to facilitate the insertion of the half shaft.

[0031] A semi-shaft 500 passes through the frame 200 and is partially positioned within the semi-circular groove 621. The semi-shaft is a circular shaft with a semi-circular boss at its front end, allowing the boss to engage with the semi-circular groove. Furthermore, relative rotation allows for misalignment between the semi-circular boss and the semi-circular groove. Figure 2 and Figure 3 As shown.

[0032] The operating handle 300 is rotatably disposed on the outside of the outdoor circuit breaker housing 100 and fixedly connected to the half shaft 500. The operating handle 300 has two positions: locked and unlocked. It is mainly used by the user to directly operate the half shaft from outside the outdoor circuit breaker housing to forcibly disconnect the permanent magnet mechanism, while restricting the movement of the permanent magnet mechanism.

[0033] The half-shaft 500 has a locked state in which it rotates relative to the operating handle 300 when it is in the locked position and forms a misalignment with the semi-circular groove 621 to restrict the reset of the moving iron core 610, and an unlocked state in which it rotates relative to the operating handle 300 when it is in the unlocked position and matches with the semi-circular groove 621 to release the restriction on the moving iron core 610.

[0034] The frame 200 is also provided with a locking mechanism on the outside. By setting the locking mechanism, after the operating handle is rotated into the locked position or the unlocked position, the locking mechanism can maintain the corresponding state and avoid accidental contact that could cause the action.

[0035] The locking mechanism includes a fixing member 700 fixedly connected to the half shaft 500, and a locking member 800 with one end hinged to the fixing member 700. The other end of the locking member 800 is provided with a guide groove 810, and the other end of the locking member 800 is connected to the frame 200 through a pin 820. The pin 820 is slidably disposed in the guide groove 810, and a spring 900 is also provided between the locking member 800 and the pin 820.

[0036] When the operating handle is rotated, a certain amount of force is required to compress the locking spring, which in turn causes the half-shaft to rotate. After the rotation is completed, the locking spring returns to its original position, pressing against the fixing part and maintaining its state. This means that a relatively large force is required to operate the operating handle, preventing accidental operation of the operating handle.

[0037] The locking member 800 has protrusions 830 on both sides of its front end. One end of the spring 900 is limited by the protrusions 830. The protrusions restrict one end of the spring, while the other end is restricted by a pin. The pin can slide relative to the guide groove. Therefore, when a large external force is applied, the pin can move relative to the compressed spring, thus driving the operating handle to rotate. However, when a small force is applied, due to the presence of the spring, when the external force is less than the spring force, the locking member will not be driven to rotate because it is pressed against the fixing member.

[0038] As shown in Figure 5, the locking component will press against the fixing component in both states. The fixing component can be directly welded to the half shaft or directly fixed to the half shaft with bolts.

[0039] The frame 200 is equipped with a limit switch 400, and one side of the fixing member 700 is equipped with a trigger member 40 for triggering the limit switch 400. Preferably, this trigger member directly utilizes the extension section of the hinge shaft between the locking member and the fixing member, which reduces costs, simplifies installation, and allows for multiple uses from a single shaft. Furthermore, when it rotates, it touches the limit switch, causing it to close and disconnecting the control from the corresponding control board, thus avoiding remote control.

[0040] The frame 200 is provided with a limiting member 50, which is welded to the panel. The limiting member 50 has a notch 60, and the fixing member 700 is placed in the notch 60. Its upper and lower ends limit the fixing member, thereby limiting the maximum rotation angle of the half shaft.

[0041] The frame 200 includes a rear end cover 220 with a central hole. The pull rod 630 of the permanent magnet mechanism 600 is partially placed in the central hole. The central hole is used to limit the concentricity of the pull rod to ensure that the moving iron core does not shift position when it moves.

[0042] One end of the half-shaft 500 is provided with an indicator 10, and the outer side of the outdoor circuit breaker housing 100 is provided with an indicator mark 20 corresponding to the indicator 10. There are two indicator marks, which are arranged side by side. The indicator is a pointer or indicator arrow that rotates synchronously with the half-shaft. As the half-shaft rotates, it rotates between the two indicator marks, thereby realizing position indication, so that the user can understand the current status or whether the operation is in place.

[0043] The operating handle 300 is provided with a direction indicator mark 30, which is used to indicate the operating direction of the operating handle.

[0044] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker, characterized in that: It includes: The frame (200) is fixedly installed inside the outdoor circuit breaker housing (100); The permanent magnet mechanism (600) is fixedly supported by the frame (200), and has a moving iron core (610) and a permanent magnet assembly (620) arranged opposite to each other, and the permanent magnet assembly (620) has a semi-circular groove (621) near the moving iron core (610). A half-shaft (500) is disposed through the frame (200), and a portion thereof rests within the semi-circular groove (621). An operating handle (300) is rotatably mounted on the outside of the outdoor circuit breaker housing (100) and fixedly connected to the half-shaft (500). The operating handle (300) has two positions: locked and unlocked. The half-shaft (500) has a locked state in which it rotates relative to the semi-circular groove (621) to form a misalignment that restricts the resetting of the moving iron core (610) when the operating handle (300) is in the locked position, and an unlocked state in which it rotates relative to the semi-circular groove (621) to release the restriction on the moving iron core (610) when the operating handle (300) is in the unlocked position.

2. The self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker according to claim 1, characterized in that: A locking mechanism is also provided on the outside of the frame (200).

3. The self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker according to claim 2, characterized in that: The locking mechanism includes a fixing member (700) fixedly connected to the half shaft (500) and a locking member (800) hinged to the fixing member (700) at one end. The other end of the locking member (800) is provided with a guide groove (810), and the other end of the locking member (800) is connected to the frame (200) through a pin (820). The pin (820) is slidably disposed in the guide groove (810), and a spring (900) is also provided between the locking member (800) and the pin (820).

4. The self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker according to claim 3, characterized in that: The locking member (800) has protrusions (830) on both sides of its front end, and one end of the spring (900) is limited by the protrusions (830).

5. A self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker according to claim 3 or 4, characterized in that: The frame (200) is provided with a limit switch (400), and the fastener (700) is provided with a trigger (40) on one side for triggering the limit switch (400).

6. The self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker according to claim 3, characterized in that: The frame (200) is provided with a limiting member (50), the limiting member (50) has a notch (60), and the fixing member (700) is placed in the notch (60).

7. The self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker according to claim 1, characterized in that: The frame (200) includes a rear end cover (220) having a central hole, and a portion of the pull rod (630) of the permanent magnet mechanism (600) rests within the central hole.

8. The self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker according to claim 1, characterized in that: One end of the half shaft (500) is provided with an indicator (10), and the outer side of the outdoor circuit breaker housing (100) is provided with an indicator mark (20) corresponding to the indicator (10).

9. A self-locking mechanism for a permanent magnet mechanism in an outdoor circuit breaker according to claim 1, characterized in that: The operating handle (300) is provided with a direction indicator (30).

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