Universal circuit breaker key locking device and circuit breaker

Abstract

The utility model provides a universal circuit breaker key locking device and a circuit breaker. The universal circuit breaker key locking device comprises a first key locking mechanism, a second key locking mechanism and a mounting bracket, the first key locking mechanism and the second key locking mechanism are installed on the installation support side by side, and a first lock rod of the first key locking mechanism is located at a first locking position and used for rotating relative to the installation support under driving of a first key and switching between a locking state and an unlocking state; and a second lock rod of the second key locking mechanism is positioned at a second locking position and is used for rotating relative to the mounting bracket under the driving of a second key and switching between a locking state and an unlocking state. According to the utility model, the two key locking mechanisms are arranged, opening locking can be carried out at different locking positions, and when one key locking mechanism has a mechanical fault, the other key locking mechanism can be used as a standby to ensure the locking capability of the system, so that the operation and maintenance safety is improved, and meanwhile, the function of a single key locking mechanism is also considered.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a universal circuit breaker key locking device and a circuit breaker. Background Technology

[0002] Universal circuit breakers are crucial components of low-voltage power distribution systems, typically used as the main switch. The key-locking device is a vital safety mechanical locking mechanism for universal circuit breakers, used to lock the circuit breaker in the open position. This prevents the circuit breaker from closing when power outages are required for maintenance, ensuring line safety. Each lock cylinder is equipped with a key. After locking, removing the key will lock the universal circuit breaker in the open position, preventing it from closing and thus preventing accidental closing and potential electrical accidents.

[0003] Conventional universal circuit breakers have only one key locking device. When the key locking mechanism fails mechanically, the lack of a backup locking mechanism will cause the system to completely lose its locking capability, resulting in relatively poor operation and maintenance safety.

[0004] Patent document CN216671438U discloses a trip position lock for a circuit breaker. It includes a bracket, a lock cylinder fixedly mounted on the bracket, a key inserted into the lock cylinder that can rotate back and forth, a drive shaft mounted on the plate of a transmission base, and a linkage plate rotatably mounted on the drive shaft. During the back-and-forth rotation of the key into the lock cylinder, it drives the drive shaft within the lock cylinder to rotate back and forth, thereby causing the transmission base to rotate back and forth. The rotation of the transmission base, in turn, drives the linkage plate to rotate back and forth, thus locking or unlocking the circuit breaker's trip lever. While this invention saves space and avoids interference with the controller, achieving the locking function directly through a limit structure, a mechanical failure in a single locking mechanism can cause the system to completely lose its locking capability. Utility Model Content

[0005] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a universal circuit breaker key locking device and a circuit breaker.

[0006] The universal circuit breaker key locking device provided by this utility model includes a first key locking mechanism, a second key locking mechanism, and a mounting bracket.

[0007] The first key locking mechanism and the second key locking mechanism are mounted side by side on the mounting bracket. The first locking rod of the first key locking mechanism is located in the first locking position and is used to rotate relative to the mounting bracket under the drive of the first key, switching between the locked state and the unlocked state.

[0008] The second key locking mechanism has a second locking rod in a second locked position, which is used to rotate relative to the mounting bracket under the action of the second key, switching between the locked state and the unlocked state.

[0009] Preferably, the first key locking mechanism includes a first locking bar, a first lock cylinder, and a first key;

[0010] The mounting portion of the first lock cylinder is fixedly mounted on one side of the mounting bracket, the rotating portion of the first lock cylinder extends to the other side of the mounting bracket, and the first lock rod is fixedly mounted on the end of the rotating portion;

[0011] The first key is used to insert into the rotating part from one side of the mounting bracket and drive the first locking rod to rotate. The end of the first locking rod is the locking end, which is used to switch between the locked state and the unlocked state by rotation.

[0012] Preferably, the second key locking mechanism includes a second locking bar, a second lock cylinder, and a second key;

[0013] The mounting portion of the second lock cylinder is fixedly mounted on one side of the mounting bracket, the rotating portion of the second lock cylinder extends to the other side of the mounting bracket, and the second lock rod is fixedly mounted on the end of the rotating portion;

[0014] The second key is used to insert into the rotating part from one side of the mounting bracket and drive the second locking rod to rotate. The end of the second locking rod is the locking end, which is used to switch between the locked and unlocked states by rotation.

[0015] Preferably, the length of the first locking rod is greater than the length of the second locking rod, and the distance between the locking end of the first locking rod and the mounting bracket is greater than the distance between the locking end of the second locking rod and the mounting bracket.

[0016] Preferably, the mounting portion of the first lock cylinder is detachably mounted on one side of the mounting bracket by means of a second nut, and the first lock rod is fixedly mounted on the end of the rotating portion by means of a first nut.

[0017] Preferably, the mounting portion of the second lock cylinder is detachably mounted on one side of the mounting bracket by a fourth nut, and the second lock rod is fixedly mounted on the end of the rotating portion by a third nut.

[0018] Preferably, the pivot of the first lock cylinder and the pivot of the second lock cylinder are parallel to each other.

[0019] Preferably, the model number of the first lock cylinder is the same as that of the second lock cylinder, and the model number of the first key is the same as that of the second key.

[0020] The circuit breaker provided by this utility model includes a circuit breaker body and a universal circuit breaker key locking device, wherein the universal circuit breaker key locking device is installed on the circuit breaker body.

[0021] Both the first locking lever and the second locking lever act on the operating mechanism of the circuit breaker body, and the first locking lever and the second locking lever act on the first locking position and the second locking position of the operating mechanism, respectively.

[0022] Preferably, when the first locking rod is in the locked state, the locking end of the first locking rod rotates to a first angle, and the locking end of the first locking rod abuts against and limits the operation mechanism located in the open position;

[0023] When the first locking rod is in the unlocked state, the locking end of the first locking rod rotates to the second angle, and the locking end of the first locking rod does not contact the operating mechanism;

[0024] When the second locking rod is in the locked state, the locking end of the second locking rod rotates to the third angle, and the locking end of the second locking rod abuts against the operating mechanism located in the open position for a limit stop;

[0025] When the second locking lever is in the unlocked state, the locking end of the second locking lever rotates to the fourth angle, and the locking end of the first locking lever does not contact the operating mechanism.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This utility model, by setting two parallel key locking mechanisms, can lock the circuit breaker in different locking positions. If one key locking mechanism fails mechanically, the other can serve as a backup to ensure the system's locking capability, thus improving operation and maintenance safety. Furthermore, the two key locking mechanisms can be freely selected; a single key locking mechanism can be chosen according to conventional operation and maintenance requirements, or two key locking mechanisms with higher operation and maintenance safety can be selected. Attached Figure Description

[0028] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of the universal circuit breaker key locking device in this utility model;

[0030] Figure 2 This is a schematic diagram of the overall structure of the circuit breaker of this utility model.

[0031] The diagram shows:

[0032] First locking rod 1, fourth nut 8

[0033] First nut 2 Second lock cylinder 9

[0034] Second nut 3 Universal circuit breaker key locking device 10

[0035] Mounting bracket 4 Circuit breaker body 11

[0036] First lock cylinder 5, first locking position 12

[0037] Second locking lever 6, second locking position 13

[0038] Third nut 7 Detailed Implementation

[0039] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0040] This utility model discloses a universal circuit breaker key locking device and a circuit breaker. With two key locking mechanisms, the circuit breaker can be locked in different locking positions. If one key locking mechanism fails mechanically, the other can serve as a backup to ensure the system's locking capability, thereby improving operation and maintenance safety. The two key locking mechanisms can be freely selected. A single key locking mechanism can be selected according to conventional operation and maintenance requirements, or two key locking mechanisms with higher operation and maintenance safety can be selected.

[0041] According to the universal circuit breaker key locking device provided by this utility model, such as Figure 1 As shown, it includes a first key locking mechanism, a second key locking mechanism, and a mounting bracket 4; the first key locking mechanism and the second key locking mechanism are mounted side by side on the mounting bracket 4, the first key locking mechanism has a first locking rod 1 located in a first locking position 12, which is used to rotate relative to the mounting bracket 4 under the drive of the first key, switching between a locked state and an unlocked state; the second key locking mechanism has a second locking rod 6 located in a second locking position 13, which is used to rotate relative to the mounting bracket 4 under the drive of the second key, switching between a locked state and an unlocked state.

[0042] This invention integrates two key locking mechanisms into one circuit breaker mechanism, so that when one key locking mechanism fails mechanically, the other key locking mechanism can serve as a backup, thereby ensuring the circuit breaker's tripping and locking function. Compared with a circuit breaker with a single key locking mechanism, it can significantly improve its safety. At the same time, it can also take into account the functions of a single key locking mechanism, and users can choose according to their actual needs.

[0043] Specifically, the first key locking mechanism includes a first locking rod 1, a first lock cylinder 5, and a first key; the mounting portion of the first lock cylinder 5 is fixedly mounted on one side of the mounting bracket 4, and the rotating portion of the first lock cylinder 5 extends to the other side of the mounting bracket 4; the first locking rod 1 is fixedly mounted on the end of the rotating portion; the first key is used to insert into the rotating portion from one side of the mounting bracket 4 and drive the first locking rod 1 to rotate, and the end of the first locking rod 1 is a locking end, used to switch between the locked state and the unlocked state by rotation.

[0044] The second key locking mechanism includes a second locking rod 6, a second lock cylinder 9, and a second key. The mounting portion of the second lock cylinder 9 is fixedly mounted on one side of the mounting bracket 4, and the rotating portion of the second lock cylinder 9 extends to the other side of the mounting bracket 4. The second locking rod 6 is fixedly mounted on the end of the rotating portion. The second key is inserted into the rotating portion from one side of the mounting bracket 4, causing the second locking rod 6 to rotate. The end of the second locking rod 6 is a locking end, used to switch between a locked and unlocked state by rotation. The length of the first locking rod 1 is greater than the length of the second locking rod 6, and the distance between the locking end of the first locking rod 1 and the mounting bracket 4 is greater than the distance between the locking end of the second locking rod 6 and the mounting bracket 4, thereby achieving locking functions at different positions.

[0045] In a preferred embodiment, the mounting portion of the first lock cylinder 5 is detachably mounted on one side of the mounting bracket 4 via a second nut 3, and the first locking rod 1 is fixedly mounted on the end of the rotating portion via a first nut 2. The mounting portion of the second lock cylinder 9 is detachably mounted on one side of the mounting bracket 4 via a fourth nut 8, and the second locking rod 6 is fixedly mounted on the end of the rotating portion via a third nut 7. The rotation axis of the first lock cylinder 5 and the rotation axis of the second lock cylinder 9 are parallel to each other.

[0046] Example 1

[0047] This embodiment provides a circuit breaker, such as Figure 2 As shown, the circuit breaker includes a circuit breaker body 11 and a universal circuit breaker key locking device 10, which is mounted on the circuit breaker body 11. The first locking rod 1 and the second locking rod 6 both act on the operating mechanism of the circuit breaker body 11, and the first locking rod 1 and the second locking rod 6 act on the first locking position 12 and the second locking position 13 of the operating mechanism, respectively.

[0048] Specifically, when the first locking rod 1 is in the locked state, the locking end of the first locking rod 1 rotates to the first angle, and the locking end of the first locking rod 1 abuts against the operating mechanism located in the open position; when the first locking rod 1 is in the unlocked state, the locking end of the first locking rod 1 rotates to the second angle, and the locking end of the first locking rod 1 does not contact the operating mechanism; when the second locking rod 6 is in the locked state, the locking end of the second locking rod 6 rotates to the third angle, and the locking end of the second locking rod 6 abuts against the operating mechanism located in the open position; at the fourth angle, the locking end of the first locking rod 1 does not contact the operating mechanism.

[0049] Example 2

[0050] This embodiment is a preferred embodiment of the above embodiments, wherein the first locking rod 1 is fixed to the first locking cylinder 5 by an M8 nut, the first locking cylinder 5 is fixedly mounted on the mounting bracket 4 by an M16 nut, the second locking rod 6 is fixed to the second locking cylinder 9 by an M8 nut, the second locking cylinder 9 is fixedly mounted on the mounting bracket 4 by an M16 nut, and the mounting bracket 4 is mounted on the circuit breaker body 11 by an M4*8 screw.

[0051] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A key lockout device for a molded case circuit breaker, comprising: The first key lock mechanism, the second key lock mechanism and the mounting bracket (4) are provided; The first key lock mechanism and the second key lock mechanism are installed on the mounting bracket (4) side by side, the first key lock mechanism has a first lock rod (1) located at a first locking position (12) for rotating relative to the mounting bracket (4) under the drive of a first key to switch between a locked state and an unlocked state; The second key lock mechanism has a second lock rod (6) located at a second locking position (13) for rotating relative to the mounting bracket (4) under the drive of a second key to switch between a locked state and an unlocked state.

2. The key lockout device for a circuit breaker of claim 1, wherein, The first key lock mechanism includes the first lock rod (1), a first lock cylinder (5) and a first key; The mounting part of the first lock cylinder (5) is fixedly installed on one side of the mounting bracket (4), the rotating part of the first lock cylinder (5) extends to the other side of the mounting bracket (4), and the first lock rod (1) is fixedly installed on the end of the rotating part; The first key is used for being inserted into the rotating part from one side of the mounting bracket (4) to drive the first lock rod (1) to rotate, and the end of the first lock rod (1) is a locking end for switching between the locked state and the unlocked state through rotation.

3. The key lockout device for a circuit breaker of claim 2, wherein, The second key lock mechanism includes the second lock rod (6), a second lock cylinder (9) and a second key; The mounting part of the second lock cylinder (9) is fixedly installed on one side of the mounting bracket (4), the rotating part of the second lock cylinder (9) extends to the other side of the mounting bracket (4), and the second lock rod (6) is fixedly installed on the end of the rotating part; The second key is used for being inserted into the rotating part from one side of the mounting bracket (4) to drive the second lock rod (6) to rotate, and the end of the second lock rod (6) is a locking end for switching between the locked state and the unlocked state through rotation.

4. The key lockout device for a circuit breaker of claim 3, wherein, The length of the first lock rod (1) is greater than the length of the second lock rod (6), and the distance between the locking end of the first lock rod (1) and the mounting bracket (4) is greater than the distance between the locking end of the second lock rod (6) and the mounting bracket (4).

5. The key lockout device for a molded case circuit breaker of claim 2, wherein, The mounting part of the first lock cylinder (5) is detachably installed on one side of the mounting bracket (4) through a second nut (3), and the first lock rod (1) is fixedly installed on the end of the rotating part through a first nut (2).

6. The key lockout device for a molded case circuit breaker of claim 3, wherein, The mounting part of the second lock cylinder (9) is detachably installed on one side of the mounting bracket (4) through a fourth nut (8), and the second lock rod (6) is fixedly installed on the end of the rotating part through a third nut (7).

7. The key lockout device of claim 3, wherein, The rotation shaft of the first lock cylinder (5) is parallel to the rotation shaft of the second lock cylinder (9).

8. The key lockout device of claim 3, wherein, The model of the first lock cylinder (5) is the same as the model of the second lock cylinder (9), and the model of the first key is the same as the model of the second key.

9. A circuit breaker characterized by, The circuit breaker body (11) and the universal circuit breaker key lock device (10) of any one of claims 1-8 are provided, and the universal circuit breaker key lock device (10) is installed on the circuit breaker body (11); The first locking rod (1) and the second locking rod (6) act on the operating mechanism of the circuit breaker body (11), and the first locking rod (1) and the second locking rod (6) act on the first locking position (12) and the second locking position (13) of the operating mechanism respectively.

10. The circuit breaker of claim 9, wherein, When the first locking rod (1) is in the locked state, the locking end of the first locking rod (1) is rotated to the first angle, and the locking end of the first locking rod (1) is limited by abutting against the operating mechanism in the open position; When the first locking rod (1) is in the unlocked state, the locking end of the first locking rod (1) is rotated to the second angle, and the locking end of the first locking rod (1) is not in contact with the operating mechanism; When the second locking rod (6) is in the locked state, the locking end of the second locking rod (6) is rotated to the third angle, and the locking end of the second locking rod (6) is limited by abutting against the operating mechanism in the open position; When the second locking rod (6) is in the unlocked state, the locking end of the second locking rod (6) is rotated to the fourth angle, and the locking end of the first locking rod (1) is not in contact with the operating mechanism.

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