Opening and closing mechanical chain of external lock of 10KV indoor circuit breaker mechanism

Abstract

The utility model discloses a 10KV indoor circuit breaker mechanism external lock opening and closing mechanical interlock, and aims to provide a 10KV indoor circuit breaker mechanism external lock opening and closing mechanical interlock which is high in control accuracy and strong in coordination of all parts, and is characterized in that the upper end of an external interlock rod is connected with an isolating switch to realize the linkage of the isolating switch and a circuit breaker mechanism; according to the utility model, the opening and closing operation of the isolating switch can directly influence the action of the circuit breaker mechanism, the coordination of the system and the accuracy of the operation are improved, the circuit breaker can be effectively prevented from being closed under improper conditions, and the safety control device is suitable for the technical field of safety control of 10KV indoor circuit breakers.

Description

Technical Field

[0001] The utility model relates to an externally-connected mechanical interlock for locking and unlocking the closing and opening of a 10 kV indoor circuit breaker mechanism. More specifically, it relates to the technical field of safety control of 10 kV indoor circuit breakers. Background Art

[0002] A 10 kV indoor circuit breaker is a switching device used in the indoor environment of a power system with a voltage level of 10 kV, and the mechanical interlock for locking and unlocking the closing and opening procedures of the 10 kV indoor circuit breaker mechanism is a mechanical device for ensuring the safe operation of the 10 kV indoor circuit breaker. In the power system, the safe and reliable operation of the circuit breaker is crucial for ensuring the stability of power supply. To ensure the correct operation of the circuit breaker, a reliable mechanical interlock device is required to control the closing and opening. Traditional mechanical interlock devices may have problems such as insufficient coordination in operation and low reliability, and cannot meet the requirements of the power system for the safe operation of the circuit breaker. Therefore, developing a new type of externally-connected mechanical interlock for locking and unlocking the closing and opening of a 10 kV indoor circuit breaker mechanism to improve the safety and reliability of circuit breaker operation has become an important requirement in the current power equipment field. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide an externally-connected mechanical interlock for locking and unlocking the closing and opening of a 10 kV indoor circuit breaker mechanism with high control accuracy and strong coordination among components.

[0004] To achieve the above purpose, the present utility model provides the following technical solution: An externally-connected mechanical interlock for locking and unlocking the closing and opening of a 10 kV indoor circuit breaker mechanism, characterized in that it includes a left side plate and a right side plate arranged oppositely, and an externally-connected interlock rod arranged on the right side plate. The upper end of the externally-connected interlock rod is connected to the disconnector. A tripping electromagnet is arranged on the right side plate, and a reclosing interlock outer plate is arranged at the bottom end of the tripping electromagnet. A reclosing interlock cam is arranged on one side of the reclosing interlock outer plate, and a reclosing interlock inner plate is arranged on the other side. A closing half shaft is arranged at the bottom end of the reclosing interlock inner plate, and a closing half shaft locking plate is arranged on the closing half shaft.

[0005] By adopting the above technical solution, the linkage between the disconnector and the circuit breaker mechanism is realized. The upper end of the externally-connected interlock rod is connected to the disconnector, so that the closing and opening operations of the disconnector can directly affect the action of the circuit breaker mechanism, improving the coordination of the system and the accuracy of operation. It can effectively prevent the circuit breaker from closing under inappropriate circumstances, reducing the probability of power accidents and enhancing the safety of the power system.

[0006] The utility model is further configured as follows: an upper locking plate is provided at the lower end of the external locking rod, a positioning hole is provided on the upper locking plate and a corresponding through hole is provided on the right side plate, the upper locking plate is slidably connected to the right side plate up and down, a gate opening button push plate assembly is provided on one side of the upper locking plate and the gate opening button push plate assembly is in an "L" shape, the lower end of the gate opening button push plate assembly conflicts with the upper locking plate and is rotatably connected to the right side plate, when the disconnector is opened, the external locking rod linked with the disconnector is pressed downward by force to drive the upper locking plate to be pressed downward, the linked gate opening button push plate shaft assembly rotates clockwise and the reclosing interlocking inner plate moves downward, driving the gate opening half-shaft to rotate, so that the circuit breaker mechanism is opened and tripped; conversely, when the disconnector is closed, the external locking rod linked with the disconnector is disengaged from the upper locking plate, so that after the reclosing interlocking inner plate is reset upward, the closing half-shaft lock plate is disengaged from the reclosing interlocking inner plate restriction, so that the circuit breaker mechanism can perform closing action at any time in the open state.

[0007] By adopting the above technical solution, the opening and closing actions can be accurately controlled, so that the opening half-shaft can be accurately driven to rotate, causing the circuit breaker mechanism to open and trip, ensuring the reliability of the opening action, realizing the interlocking function and ensuring the flexibility of closing.

[0008] The utility model is further configured as follows: a disconnecting half-shaft assembly is also provided at the bottom end of the upper interlocking plate, and when the disconnecting button push plate assembly is reset, the disconnecting half-shaft assembly is linked to reset, so that the disconnecting half-shaft can be closed at any time.

[0009] By adopting the above technical solution, it is ensured that the circuit breaker can operate smoothly when it needs to be closed, which improves the response speed and flexibility of the system. Timely reset action can make the system return to the state ready to close more quickly, which is conducive to improving the stability of the power system and ensuring the continuity of power supply.

[0010] The utility model is further configured as follows: two positioning holes are provided in the reclosing lock outer plate and the two positioning holes are arranged up and down, the right side plate is provided with relative through holes, the reclosing lock outer plate and the right side plate are slidably connected up and down, the top of the reclosing lock outer plate is provided with a protrusion extending outward, one end of the reclosing lock inner plate is placed in the reclosing lock outer plate and is located at the bottom of the reclosing lock outer plate, the protrusion is respectively connected with the bottom of the reclosing lock outer plate and the top of the reclosing lock inner plate with tension springs, when the reclosing lock cam is separated from the reclosing lock outer plate, the tension spring drives the reclosing lock outer plate, and the linkage reclosing lock inner plate slides down, so that the reclosing lock inner plate conflicts with the closing half-shaft lock plate, restricting the rotation of the closing half-shaft, so that the circuit breaker can be closed at any time in the open state.

[0011] By adopting the above technical solution, the mechanism realizes precise interlocking control. This interlocking structure can effectively prevent the circuit breaker from closing at inappropriate times, enhancing the safety of the circuit breaker and reducing the risk of power accidents.

[0012] The present utility model is further configured as follows: The reclosing interlock outer plate is in a "7" shape and the reclosing interlock cam is located at the corner of the reclosing interlock outer plate, and the top of the reclosing interlock cam abuts against the reclosing interlock outer plate.

[0013] By adopting the above technical solution, it ensures stable contact between the cam and the outer plate, guaranteeing that during the closing and opening processes, the cam can accurately control the movement of the outer plate. This structural design makes the cooperation between the reclosing interlock cam and the outer plate closer, reducing the possibility of failures caused by poor contact or inaccurate actions, and improving the reliability of the mechanical interlock.

[0014] The present utility model is further configured as follows: The closing half-axis lock plate is also in a "7" shape, the closing half-axis lock plate is located at the bottom of the reclosing interlock inner plate, and the closing half-axis lock plate is fixedly connected to the closing half-axis. When the reclosing interlock inner plate slides downward, the closing half-axis lock plate stops rotating.

[0015] By adopting the above technical solution, this tight cooperation and accurate control mechanism improve the reliability of the mechanical interlock, reduce the risk of circuit breaker operation errors caused by failures of the closing half-axis lock plate, and ensure that the mechanism cannot be closed twice when in the closed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall view of an embodiment of the external lock opening and closing mechanical interlock of a 10KV indoor circuit breaker mechanism of the present utility model;

[0017] Figure 2 It is a specific structural schematic diagram of an embodiment of the right side plate of the present utility model;

[0018] In the figure: 1, left side plate; 2, right side plate; 3, tripping electromagnet; 4, reclosing interlock inner plate; 5, reclosing interlock cam; 6, reclosing interlock outer plate; 7, closing half-axis; 8, external interlock rod; 9, upper interlock plate; 10, tripping button push plate assembly; 11, tension spring; 12, tripping half-axis assembly; 13, closing half-axis lock plate; 14, tension spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Refer to Figures 1 to 2 to further describe an embodiment of the external lock opening and closing mechanical interlock of a 10KV indoor circuit breaker mechanism of the present utility model.

[0020] For ease of explanation, in the embodiments, spatial relative terms such as "upper", "lower", "left", "right", etc. are used to describe the relationship of one element or feature shown in the figure with respect to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" the other elements or features. Thus, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly.

[0021] Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0022] An external mechanical interlock for separating and closing a 10KV indoor circuit breaker mechanism, characterized in that it includes a left side plate 1 and a right side plate 2 arranged oppositely, and an external interlock rod 8 arranged on the right side plate 2. The upper end of the external interlock rod 8 is connected to the disconnector. A shunt electromagnet 3 is provided on the right side plate 2, and a reclosing interlock outer plate 6 is provided at the bottom end of the shunt electromagnet 3. A reclosing interlock cam 5 is provided on one side of the reclosing interlock outer plate 6, and a reclosing interlock inner plate 4 is provided on the other side. A closing half shaft 7 is provided at the bottom end of the reclosing interlock inner plate 4, and a closing half shaft lock plate 13 is provided on the closing half shaft 7, realizing the linkage between the disconnector and the circuit breaker mechanism. The upper end of the external interlock rod 8 is connected to the disconnector, so that the opening and closing operations of the disconnector can directly affect the operation of the circuit breaker mechanism, improving the coordination of the system and the accuracy of the operation, effectively preventing the circuit breaker from closing under inappropriate conditions, reducing the probability of power accidents, and enhancing the safety of the power system.

[0023] Preferably, an upper chain plate 9 is provided at the lower end of the external chain rod 8, a positioning hole is provided on the upper chain plate 9 and a corresponding through hole is provided on the right side plate 2, the upper chain plate 9 is slidably connected with the right side plate 2 up and down, a gate opening button push plate assembly 10 is provided on one side of the upper chain plate 9, and the gate opening button push plate assembly 10 is "L" shaped, the lower end of the gate opening button push plate assembly 10 is in conflict with the upper chain plate 9 and is rotatably connected with the right side plate 2, when the disconnector is opened, the external chain rod 8 linked with the disconnector is pressed downward by force to drive the upper chain plate 9 to be pressed downward, and the gate opening button push plate assembly 10 is linked to rotate clockwise and interlock with the reclosing switch The plate 4 moves downward, driving the closing half-shaft 7 to rotate, causing the circuit breaker mechanism to open and trip; conversely, when the disconnector is closed, the external interlocking rod 8 linked to the disconnector is disengaged from the upper interlocking plate 9, so that after the reclosing interlocking inner plate 4 is reset upward, the closing half-shaft 7 lock plate is disengaged from the restriction of the reclosing interlocking inner plate 4, so that the circuit breaker mechanism can close at any time in the open state, and the opening and closing actions can be accurately controlled, so that the closing half-shaft 7 can be accurately driven to rotate, causing the circuit breaker mechanism to open and trip, ensuring the reliability of the opening action, realizing the interlocking function and ensuring the flexibility of closing.

[0024] Preferably, a trip half-axis assembly 12 is also provided at the bottom end of the upper interlocking plate 9. When the trip button push plate assembly 10 is reset, the trip half-axis assembly 12 is reset, so that the closing half-axis 7 can be closed at any time, ensuring that the circuit breaker can be operated smoothly when closing is required, improving the response speed and flexibility of the system, and timely resetting can make the system return to the state ready to close more quickly, which is beneficial to improving the stability of the power system and ensuring the continuity of power supply.

[0025] Preferably, two positioning holes are provided in the reclosing lock interlock outer plate 6 and the two positioning holes are arranged up and down, and the right side plate 2 is provided with relative through holes, the reclosing lock interlock outer plate 6 and the right side plate 2 are slidably connected up and down, and a protrusion extending outward is provided at the top of the reclosing lock interlock outer plate 6, and one end of the reclosing lock interlock inner plate 4 is placed in the reclosing lock interlock outer plate 6 and is located at the bottom of the reclosing lock interlock outer plate 6, and the protrusion is respectively connected with the tension spring 11 provided at the bottom end of the reclosing lock interlock outer plate 6 and the top end of the reclosing lock interlock inner plate 4. When the reclosing lock interlock cam 5 disengages from the reclosing lock interlock outer plate 6, the tension spring 11 drives the reclosing lock interlock outer plate 6, and the linkage reclosing lock interlock inner plate 4 slides down, so that the reclosing lock interlock inner plate 4 conflicts with the closing half-shaft lock plate 13, restricting the rotation of the closing half-shaft 7, so that the circuit breaker can be closed at any time in the open state, so that the mechanism can realize precise interlocking control. This interlocking structure can effectively prevent the circuit breaker from closing at an inappropriate time, enhance the safety of the circuit breaker, and reduce the risk of power accidents.

[0026] Preferably, the reclosing interlocking outer plate 6 is in a "7" shape and the reclosing interlocking cam 5 is located at the corner of the reclosing interlocking outer plate 6, and the top of the reclosing interlocking cam 5 is in conflict with the reclosing interlocking outer plate 6, ensuring stable contact between the cam and the outer plate, ensuring that the cam can accurately control the movement of the outer plate during the closing and opening process. This structural design makes the fit between the reclosing interlocking cam 5 and the outer plate closer, reduces the possibility of failure due to poor contact or inaccurate movement, and improves the reliability of the mechanical interlocking.

[0027] Preferably, the closing half-shaft lock plate 13 is also in a "7" shape. The closing half-shaft lock plate 13 is located at the bottom of the reclosing interlocking inner plate 4. The closing half-shaft lock plate 13 is fixedly connected to the closing half-shaft 7. When the reclosing interlocking inner plate 4 slides downward, the closing half-shaft lock plate 13 stops rotating. This close fit and accurate control mechanism improves the reliability of mechanical interlocking, reduces the risk of circuit breaker operation errors caused by failure of the closing half-shaft lock plate 13, and ensures that the mechanism cannot be closed twice when in the closed state.

[0028] This interlock is used for electrical anti-interlocking operation, that is, the anti-misoperation interlock of circuit breakers and disconnectors.

[0029] 1. When the disconnector is in the open state, the external interlocking rod 8 linked with the disconnector is pressed down by force, driving the upper interlocking plate 9 to press down, linking the opening button push plate shaft assembly to rotate clockwise and the reclosing interlocking inner plate 4 to move downward, so that the circuit breaker mechanism performs the following actions at the same time

[0030] 1.1 When the linkage opening button push plate assembly 10 rotates, the closing half shaft is driven to rotate through the connecting plate, so that the circuit breaker mechanism performs the opening tripping action and remains in this state, so that the circuit breaker mechanism always remains in the opening state (that is, the circuit breaker can automatically open immediately after the circuit breaker is closed by mistake);

[0031] 1.2 When the interlocking inner plate 4 of the reclosing linkage moves downward, the interlocking inner plate 4 of the reclosing linkage locks the locking plate of the closing half shaft 7, restricting the closing half shaft 7 from rotating clockwise, ensuring that the circuit breaker mechanism cannot perform the closing action when the disconnector is in the open state;

[0032] 2. When the disconnector is in the closed state, the external interlocking rod 8 linked to the disconnector is out of contact with the upper interlocking plate 9, causing the circuit breaker mechanism to perform the following actions at the same time

[0033] 2.1 The opening button push plate assembly 10 automatically resets counterclockwise, and the opening half-shaft assembly 12 is linked to reset, so that the closing half-shaft 7 remains in a state where it can be closed at any time;

[0034] 2.2 The reclosing interlock inner plate 4 automatically resets upward and drives the upper interlock plate 9 to reset. After the reclosing interlock inner plate 4 resets upward, the closing half-axis lock plate 13 is released from the restriction of the reclosing interlock inner plate 4. At this time, the closing half-axis 7 can rotate clockwise, ensuring that the circuit breaker mechanism can be closed at any time in the open state;

[0035] 3. When the circuit breaker mechanism closes, the reclosing interlock cam 5 disengages from the reclosing interlock outer plate 6. The tension spring 11 drives the reclosing interlock outer plate 6, which in turn drives the reclosing interlock inner plate 4 to slide downward, causing the reclosing interlock inner plate 4 to lock the closing half-axis lock plate 13 and restricting the clockwise rotation of the closing half-axis 7, ensuring that the mechanism cannot be closed twice when in the closed state.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A 10KV indoor circuit breaker mechanism with external lock opening and closing mechanical interlock, characterized in that: The invention comprises a left side plate (1) and a right side plate (2) which are arranged opposite to each other, and an external interlocking rod (8) which is arranged on the right side plate (2); the upper end of the external interlocking rod (8) is connected to the isolating switch; the right side plate (2) is provided with an opening electromagnet (3) and a reclosing interlocking outer plate (6) which is arranged at the bottom end of the opening electromagnet (3); a reclosing interlocking cam (5) is arranged on one side of the reclosing interlocking outer plate (6) and a reclosing interlocking inner plate (4) is arranged on the other side; a closing half-shaft (7) is arranged at the bottom end of the reclosing half-shaft (7), and a closing half-shaft locking plate (13) is arranged on the closing half-shaft (7).

2. According to claim 1, a 10KV indoor circuit breaker mechanism external lock opening and closing mechanical interlocking is characterized in that: An upper locking plate (9) is provided at the lower end of the external locking rod (8), a positioning hole is provided on the upper locking plate (9) and a corresponding through hole is provided on the right side plate (2), the upper locking plate (9) is slidably connected to the right side plate (2) up and down, a disconnecting button push plate assembly (10) is provided on one side of the upper locking plate (9), and the disconnecting button push plate assembly (10) is in an "L" shape, the lower end of the disconnecting button push plate assembly (10) contacts the upper locking plate (9) and is rotatably connected to the right side plate (2), and when the disconnecting switch is disconnected, the external locking rod linked to the disconnecting switch (8) is pressed downward by the force, driving the upper interlocking plate (9) downward, and the linkage opening button push plate shaft assembly rotates clockwise and the reclosing interlocking inner plate (4) moves downward, driving the closing half shaft (7) to rotate, so that the circuit breaker mechanism is opened and tripped; conversely, when the disconnector is closed, the external interlocking rod (8) linked to the disconnector is disengaged from the upper interlocking plate (9), so that the reclosing interlocking inner plate (4) is reset upward, and the closing half shaft lock plate (13) is disengaged from the restriction of the reclosing interlocking inner plate (4), so that the circuit breaker mechanism cannot perform the closing action again in the closed state.

3. A 10KV indoor circuit breaker mechanism external lock opening and closing mechanical interlock according to claim 2, characterized in that: The bottom end of the upper interlocking plate (9) is also provided with a switch-off half-shaft assembly (12). When the switch-off button push plate assembly (10) is reset, the switch-off half-shaft assembly (12) is reset in linkage, so that the switch-off half-shaft (7) can be closed at any time.

4. A 10KV indoor circuit breaker mechanism external lock opening and closing mechanical interlock according to claim 1, characterized in that: The reclosing lock interlocking outer plate (6) is provided with two positioning holes, and the two positioning holes are arranged up and down. The right side plate (2) is provided with relative through holes. The reclosing lock interlocking outer plate (6) and the right side plate (2) are connected by sliding up and down. The top of the reclosing lock interlocking outer plate (6) is provided with a protrusion extending outward. One end of the reclosing lock interlocking inner plate (4) is placed in the reclosing lock interlocking outer plate (6) and is located at the bottom of the reclosing lock interlocking outer plate (6). The protrusion is respectively connected with the bottom of the reclosing lock interlocking outer plate (6) and the top of the reclosing lock interlocking inner plate (4). When the reclosing lock interlocking cam (5) is separated from the reclosing lock interlocking outer plate (6), the protrusion (11) drives the reclosing lock interlocking outer plate (6) and links the reclosing lock interlocking inner plate (4) to slide down, so that the reclosing lock interlocking inner plate (4) conflicts with the closing half-shaft lock plate (13), restricting the closing half-shaft (7) from rotating, so that the circuit breaker mechanism cannot be closed again in the closed state.

5. A 10KV indoor circuit breaker mechanism external lock opening and closing mechanical interlock according to claim 4, characterized in that: The reclosing lock interlocking outer plate (6) is in a "7" shape and the reclosing lock interlocking cam (5) is located at a corner of the reclosing lock interlocking outer plate (6), and the top end of the reclosing lock interlocking cam (5) is in conflict with the reclosing lock interlocking outer plate (6).

6. A 10KV indoor circuit breaker mechanism external lock opening and closing mechanical interlock according to claim 1, characterized in that: The closing half-shaft lock plate (13) is also in a "7" shape. The closing half-shaft lock plate (13) is located at the bottom of the reclosing interlocking inner plate (4). The closing half-shaft lock plate (13) is fixedly connected to the closing half-shaft (7). When the reclosing interlocking inner plate (4) slides downward, the closing half-shaft lock plate (13) stops rotating.

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