All-insulation ring main unit with better interlocking function
By designing the first vertical interlocking plate, the second vertical interlocking plate and swing arm in the fully insulated ring grid cabinet, the interlocking between the circuit breaker and the isolation switch is achieved, and the interlocking relationship in the prior art is solved. The poor performance problem improves safety performance.
Patent Information
- Application Number
- CN202420198940.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-27
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-01-27
AI Technical Summary
The existing ring network cabinet circuit breaker and isolation correlation interlocking mechanism have complex structures, poor interlocking relationship reliability, and there is a possibility of misoperation, hiding safety hazards.
A fully insulated ring net cabinet is designed, adopting the first vertical interlocking plate, the second vertical interlocking plate and swing arm structure. Through the sliding and contact between these interlocking plates and swing arms, the circuit breaker and isolation are realized. The interlock between the switch ensures that the status of the circuit breaker and the isolating switch is consistent during closing or opening operation, and avoids misoperation.
It improves the reliability of the interlocking relationship between the circuit breaker and the isolating switch, ensures that the circuit breaker operates quickly and simply when closing, avoids arcing and misoperation, and improves the safety performance of the fully insulated ring grid cabinet.
Smart Images
Figure CN222440406U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a ring network cabinet, in particular to a fully insulated ring network cabinet with better interlocking function. Background Art
[0002] The ring main unit of the power system is equipped with circuit breakers, disconnectors, etc. The disconnector is provided with an disconnector main shaft. The cross-section of the disconnector main shaft is a regular hexagon. An operating handle is provided outside the disconnector main shaft. An disconnector operating hole for the operating handle to be inserted is also provided on the panel of the ring main unit. The disconnector operating hole is located just in front of the front end of the disconnector main shaft. When it is necessary to change the working state of the disconnector, the operating handle passes through the panel of the ring main unit through the operating hole and is sleeved on the outside of the hexagonal disconnector main shaft, so that the disconnector main shaft can be rotated and controlled; when the disconnector main shaft rotates to the closing position, the disconnector is closed, and when the disconnector main shaft rotates to the opening position, the disconnector is opened. The disconnector main shaft needs to rotate counterclockwise about 150° from the opening position to the closing position.
[0003] The circuit breaker is provided with a circuit breaker main shaft. When the circuit breaker main shaft rotates to the closing position, the circuit breaker is closed. When the circuit breaker main shaft rotates to the opening position, the circuit breaker is opened. The circuit breaker main shaft needs to rotate clockwise about 60° from the opening position to the closing position.
[0004] The closing process of the circuit breaker requires quick and crisp action, otherwise arcing may occur. In order to make the closing action of the circuit breaker quick and crisp, the main shaft of the circuit breaker is equipped with a spring energy storage mechanism and a closing release. The closing release is equipped with a closing release shaft and a release plate. The release plate and the closing release shaft are fixed together, and the two rotate synchronously (the rotation of the release plate is swinging). The closing release shaft is equipped with a torsion spring, which applies a clockwise torque to the closing release shaft; there is also a release shaft drive mechanism that drives the closing release shaft to rotate counterclockwise.
[0005] Under normal conditions, the closing and tripping shaft is not affected by the tripping shaft driving mechanism, and the closing and tripping shaft is in the normal position under the action of the torsion spring; when the circuit breaker needs to be closed, the spring energy storage mechanism is first placed in the energy storage state, and then the tripping shaft driving mechanism drives the closing and tripping shaft and the tripping plate to rotate counterclockwise by about 30° until they are in place, so that the spring energy storage mechanism releases energy and drives the circuit breaker main shaft to rotate from the opening position to the closing position.
[0006] In the prior art, in order to achieve the above interlocking function, people have designed various interlocking structures, including mechanical and electronic ones. However, the existing interlocking mechanisms of the circuit breakers and disconnectors of the ring main unit are not only complex in structure, but also have poor reliability of interlocking relationship, and there is a possibility of misoperation, which hides safety hazards. Summary of the invention
[0007] The technical problem to be solved by the utility model is to provide a fully insulated ring network cabinet with a better interlocking function. The fully insulated ring network cabinet has a simple structure and a better interlocking function.
[0008] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:
[0009] A fully insulated ring network cabinet with better interlocking function comprises a cabinet, a circuit breaker and an isolating switch, wherein the circuit breaker and the isolating switch are both arranged inside the cabinet, the circuit breaker is provided with a circuit breaker spindle, the isolating switch is provided with an isolating spindle, and the circuit breaker spindle is located above the isolating spindle; a closing button and an isolating operation hole are provided on the panel of the cabinet, the closing button is located between the circuit breaker spindle and the isolating spindle, the circuit breaker spindle rotates from the open position to the closed position in a clockwise direction, and the isolating spindle rotates from the open position to the closed position in a counterclockwise direction; the isolating operation hole is located just in front of the front end of the isolating spindle, and an isolating operation handle is provided outside the isolating spindle; the characteristic is that: it also includes It includes a first vertical interlock plate, a second vertical interlock plate and a swing arm; the first vertical interlock plate and the second vertical interlock plate are both installed on the panel of the cabinet and can slide up and down on the panel; the circuit breaker main shaft is fixedly connected with a first crank arm, and the isolation main shaft is fixedly connected with a second crank arm; the upper end of the first vertical interlock plate contacts and cooperates with the trigger end of the first crank arm, and the fixed end of the swing arm is hingedly installed on the lower end of the first vertical interlock plate, and the swing end of the swing arm is between the isolation operation hole and the isolation main shaft; the lower end of the second vertical interlock plate contacts and cooperates with the trigger end of the second crank arm, and the upper end of the second vertical interlock plate contacts and cooperates with the closing button.
[0010] Under normal working conditions, the isolating main shaft is in the closed position, the circuit breaker main shaft is also in the closed position, the trigger end of the first crank arm is against the upper end of the first vertical interlock plate, the first vertical interlock plate is located at the lowest point of its vertical movement trajectory, and the second vertical interlock plate is also located at the lowest point of its vertical movement trajectory, so that the lower end of the second vertical interlock plate cannot contact the trigger end of the second crank arm, and the upper end of the second vertical interlock plate cannot contact the closing button, and the swing end of the swing arm is blocked between the isolation operation hole and the isolation main shaft, which means that the isolation operation handle cannot pass through the panel of the cabinet and be put on the isolation main shaft at this time, that is, the isolation switch cannot be operated to prevent arcing.
[0011] When the disconnector needs to be operated (for example, when maintenance is required), the circuit breaker main shaft must first be rotated counterclockwise by a certain angle (60°-90°) to the open position, driving the first crank arm to rotate counterclockwise by the same angle, so that the blocking between the trigger end of the first crank arm and the upper end of the first vertical interlocking plate is released, and the first vertical interlocking plate and the swing arm slide upward to reset, so that the first vertical interlocking plate is located at the highest point of its vertical movement trajectory, and the swing end of the swing arm is no longer blocked between the isolation operation hole and the isolation main shaft, allowing the isolation operation handle to pass through and be sleeved on the outside of the isolation main shaft; and the isolation main shaft rotates clockwise by a certain angle, driving the second crank arm to rotate clockwise by the same angle. During the rotation of the second crank arm, the second vertical interlocking plate gradually slides upward on the panel until the trigger end of the second crank arm presses against the lower end of the second vertical interlocking plate, so that the second vertical interlocking plate is located at the highest point of its vertical movement trajectory. At this time, the upper end of the second vertical interlocking plate contacts and cooperates with the closing button, making the circuit breaker unable to perform the closing operation.
[0012] When the circuit breaker needs to be closed, the circuit breaker needs to be in an energy storage state first, and the isolation operating handle is used to drive the isolation main shaft to rotate a certain angle in the counterclockwise direction to the closing position, and the second crank arm is also driven to rotate the same angle in the counterclockwise direction, so that the blocking between the trigger end of the second crank arm and the lower end of the second vertical interlocking plate is released, and the second vertical interlocking plate slides downward to reset, so that the second vertical interlocking plate is located at the lowest point of its vertical movement trajectory, and the upper end of the second vertical interlocking plate cannot contact the closing button; at this time, by driving the circuit breaker main shaft to rotate a certain angle in the clockwise direction, the first crank arm is also driven to rotate the same angle in the clockwise direction. During the rotation of the first crank arm, the first vertical interlocking plate gradually slides downward on the panel until the trigger end of the first crank arm presses against the upper end of the first vertical interlocking plate, and the swing arm slides downward with the first vertical interlocking plate, so that the swing end of the swing arm is blocked between the isolation operating hole and the isolation main shaft, and the isolation mechanism cannot perform the opening operation, so that the circuit breaker is closed.
[0013] In the preferred embodiment, the first vertical interlocking plate is provided with a first strip guide hole running up and down, the panel of the cabinet is provided with a first guide column and a first limit column perpendicular to the panel, the first guide column is in the first strip guide hole, the first vertical interlocking plate is also provided with a second limit column, the first limit column is above the second limit column, and a first tension spring is connected between the first limit column and the second limit column; the second vertical interlocking plate is provided with a second strip guide hole running up and down, the panel of the cabinet is provided with a second guide column and a third limit column perpendicular to the panel, the second guide column is in the second strip guide hole, the second vertical interlocking plate is also provided with a fourth limit column, the third limit column is below the fourth limit column, and a second tension spring is connected between the third limit column and the fourth limit column. Through the connection of the first tension spring with the first limit column and the second limit column, and the connection of the second tension spring with the third limit column and the fourth limit column, the first vertical interlocking plate and the second vertical interlocking plate can play the role of limiting and rebounding reset.
[0014] In the preferred solution, a limit plate is provided on the panel of the cabinet, the limit plate is perpendicular to the panel, and a third strip guide hole is provided on the limit plate, which runs up and down, and the swing arm is in the third strip guide hole and can swing in the third strip guide hole. The third strip guide hole can limit and guide the movement of the swing arm, ensure that the movement path and amplitude of the swing arm meet the design requirements, avoid the swing arm from deviating or being too large during operation, and make the interlocking relationship more reliable.
[0015] In a preferred embodiment, a notch is provided at the upper end of the second vertical interlock plate, and a slot corresponding to the notch is provided on the closing button. When the upper end of the second vertical interlock plate contacts and cooperates with the closing button, the notch and the slot are engaged. When the upper end of the second vertical interlock plate contacts and cooperates with the closing button, the engagement between the notch and the slot can produce a fixed connection, preventing the circuit breaker from performing a closing operation, thereby avoiding misoperation and safety hazards.
[0016] Compared with the prior art, the utility model has the following advantages:
[0017] This fully insulated ring main unit with better interlocking function can make the interlocking relationship between the circuit breaker and the disconnector more reliable, realize quick and crisp action when closing the circuit breaker, avoid arcing and misoperation, and improve the safety performance of the fully insulated ring main unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;
[0019] Figure 2 yes Figure 1 A front view of
[0020] Figure 3It is a schematic diagram of the structure in which the first vertical interlocking plate can slide up and down in a specific embodiment of the utility model;
[0021] Figure 4 It is a schematic diagram of the structure in which the second vertical interlocking plate can slide up and down in a specific embodiment of the utility model;
[0022] Figure 5 It is a schematic diagram of the structure in which the swing end of the swing arm is blocked between the isolation operation hole and the isolation main shaft in this embodiment. DETAILED DESCRIPTION
[0023] The following is a further description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.
[0024] like Figure 1-5 As shown, the fully insulated ring main unit with better interlocking function in this embodiment includes a cabinet 1, a circuit breaker 2, a disconnector 3, a first vertical interlocking plate 4, a second vertical interlocking plate 5 and a swing arm 6; the circuit breaker 2 and the disconnector 3 are both arranged inside the cabinet 1, the circuit breaker 2 is provided with a circuit breaker main shaft 21, the disconnector 3 is provided with an isolation main shaft 31, and the circuit breaker main shaft 21 is located above the isolation main shaft 31; a closing button 11 and an isolation operation hole 12 are provided on the panel 10 of the cabinet 1, the closing button 11 is located between the circuit breaker main shaft 21 and the isolation main shaft 31, the circuit breaker main shaft 21 rotates from the opening position to the closing position in a clockwise direction, and the isolation main shaft 31 rotates from the opening position to the closing position in a counterclockwise direction; the isolation operation hole 12 is located on the isolation main shaft 31. Directly in front of the front end, the isolation main shaft 31 is externally equipped with an isolation operating handle 32; the first vertical interlock plate 4 and the second vertical interlock plate 5 are both installed on the panel 10 of the cabinet 1 and can slide up and down on the panel 10; the circuit breaker main shaft 21 is fixedly connected to the first crank arm 22, and the isolation main shaft 31 is fixedly connected to the second crank arm 33; the upper end of the first vertical interlock plate 4 is in contact with the trigger end of the first crank arm 22, and the fixed end of the swing arm 6 is hingedly mounted on the lower end of the first vertical interlock plate 4, and the swing end of the swing arm 6 is between the isolation operating hole 12 and the isolation main shaft 31; the lower end of the second vertical interlock plate 5 is in contact with the trigger end of the second crank arm 33, and the upper end of the second vertical interlock plate 5 is in contact with the closing button 11.
[0025] Under normal working conditions, the isolating main shaft 31 is in the closed position, the circuit breaker main shaft 21 is also in the closed position, the trigger end of the first crank arm 22 is against the upper end of the first vertical interlock plate 4, the first vertical interlock plate 4 is located at the lowest point of its vertical movement trajectory, and the second vertical interlock plate 5 is also located at the lowest point of its vertical movement trajectory, so that the lower end of the second vertical interlock plate 5 cannot contact the trigger end of the second crank arm 33, and the upper end of the second vertical interlock plate 5 cannot contact the closing button 11, and the swing end of the swing arm 6 is blocked between the isolation operation hole 12 and the isolation main shaft 31, which means that at this time the isolation operation handle 32 cannot pass through the panel 10 of the cabinet 1 and be mounted on the isolation main shaft 31, that is, the isolating switch 3 cannot be operated to prevent the generation of an arc.
[0026] When the disconnector 3 needs to be operated (for example, when maintenance is required), the circuit breaker main shaft 21 must first be rotated counterclockwise by a certain angle (60°-90°) to the open position, driving the first crank arm 22 to rotate counterclockwise by the same angle, so that the blocking between the trigger end of the first crank arm 22 and the upper end of the first vertical interlocking plate 4 is released, and the first vertical interlocking plate 4 and the swing arm 6 slide upward to reset, so that the first vertical interlocking plate 4 is located at the highest point of its vertical movement trajectory, and the swing end of the swing arm 6 is no longer blocked between the isolation operation hole 12 and the isolation main shaft 31, allowing isolation operation. The operating handle 32 passes through and is sleeved on the outside of the isolation main shaft 31; the isolation main shaft 31 rotates a certain angle in the clockwise direction, driving the second crank arm 33 to rotate the same angle in the clockwise direction. During the rotation of the second crank arm 33, the second vertical interlock plate 5 gradually slides upward on the panel 10 until the trigger end of the second crank arm 33 presses against the lower end of the second vertical interlock plate 5, so that the second vertical interlock plate 5 is located at the highest point of its vertical movement trajectory. At this time, the upper end of the second vertical interlock plate 5 contacts and cooperates with the closing button 11, so that the circuit breaker 2 cannot be closed.
[0027] When the circuit breaker 2 needs to be closed, the circuit breaker 2 needs to be in the energy storage state first, and the isolation operating handle 32 is used to drive the isolation main shaft 31 to rotate a certain angle in the counterclockwise direction to the closing position, and the second crank arm 33 is also driven to rotate the same angle in the counterclockwise direction, so that the blocking between the trigger end of the second crank arm 33 and the lower end of the second vertical interlocking plate 5 is released, and the second vertical interlocking plate 5 slides downward to reset, so that the second vertical interlocking plate 5 is located at the lowest point of its vertical movement trajectory, and the upper end of the second vertical interlocking plate 5 cannot contact the closing button 11; at this time, By driving the circuit breaker main shaft 21 to rotate a certain angle in the clockwise direction, the first crank arm 22 is also driven to rotate the same angle in the clockwise direction. During the rotation of the first crank arm 22, the first vertical interlocking plate 4 gradually slides downward on the panel 10 until the trigger end of the first crank arm 22 presses against the upper end of the first vertical interlocking plate 4, and the swing arm 6 slides downward with the first vertical interlocking plate 4, so that the swing end of the swing arm 6 is blocked between the isolation operation hole 12 and the isolation main shaft 31, and the isolation mechanism cannot perform the opening operation, so that the circuit breaker 2 is closed.
[0028] The first vertical interlocking plate 4 is provided with a first strip guide hole 41 running up and down, the panel 10 of the cabinet 1 is provided with a first guide column 13 and a first limit column 14 perpendicular to the panel 10, the first guide column 13 is located in the first strip guide hole 41, the first vertical interlocking plate 4 is also provided with a second limit column 42, the first limit column 14 is located above the second limit column 42, and a first tension spring 7 is connected between the first limit column 14 and the second limit column 42; the second vertical interlocking plate 5 is provided with a second strip guide hole 51 running up and down, the panel 10 of the cabinet 1 is provided with a second guide column 15 and a third limit column 16 perpendicular to the panel 10, the second guide column 15 is located in the second strip guide hole 51, the second vertical interlocking plate 5 is also provided with a fourth limit column 52, the third limit column 16 is located below the fourth limit column 52, and a second tension spring 8 is connected between the third limit column 16 and the fourth limit column 52. Through the connection between the first tension spring 7 and the first limiting column 14 and the second limiting column 42, and the connection between the second tension spring 8 and the third limiting column 16 and the fourth limiting column 52, the first vertical interlocking plate 4 and the second vertical interlocking plate 5 can be limited and rebounded.
[0029] A limit plate 17 is provided on the panel 10 of the cabinet 1, and the limit plate 17 is perpendicular to the panel 10. A third strip guide hole 18 extending up and down is provided on the limit plate 17, and the swing arm 6 is located in the third strip guide hole 18 and can swing in the third strip guide hole 18. The third strip guide hole 18 can limit and guide the movement of the swing arm 6, ensuring that the movement path and amplitude of the swing arm 6 meet the design requirements, avoiding deviation or excessive movement of the swing arm 6 during operation, and making the interlocking relationship more reliable.
[0030] The upper end of the second vertical interlock plate 5 is provided with a notch 53, and the closing button 11 is provided with a slot 111 corresponding to the notch 53. When the upper end of the second vertical interlock plate 5 contacts and cooperates with the closing button 11, the notch 53 and the slot 111 are engaged and engaged. When the upper end of the second vertical interlock plate 5 contacts and cooperates with the closing button 11, the engagement and cooperation between the notch 53 and the slot 111 can produce a fixed connection, preventing the circuit breaker 2 from performing a closing operation, thereby avoiding misoperation and safety hazards.
[0031] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. The technical personnel of the technical field to which the utility model belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.
Claims
1. A fully insulated ring main unit with better interlocking function, comprising a cabinet, a circuit breaker and an isolating switch, wherein the circuit breaker and the isolating switch are both arranged inside the cabinet, the circuit breaker is provided with a circuit breaker spindle, the isolating switch is provided with an isolating spindle, and the circuit breaker spindle is located above the isolating spindle; a closing button and an isolating operation hole are provided on the panel of the cabinet, the closing button is located between the circuit breaker spindle and the isolating spindle, the circuit breaker spindle rotates from the open position to the closed position in a clockwise direction, and the isolating spindle rotates from the open position to the closed position in a counterclockwise direction; the isolating operation hole is located directly in front of the front end of the isolating spindle, and an isolating operation handle is provided outside the isolating spindle; the characteristics are: It also includes a first vertical interlock plate, a second vertical interlock plate and a swing arm; the first vertical interlock plate and the second vertical interlock plate are both installed on the panel of the cabinet and can slide up and down on the panel; the circuit breaker main shaft is fixedly connected with a first crank arm, and the isolation main shaft is fixedly connected with a second crank arm; the upper end of the first vertical interlock plate contacts and cooperates with the trigger end of the first crank arm, and the fixed end of the swing arm is hingedly installed on the lower end of the first vertical interlock plate, and the swing end of the swing arm is located between the isolation operation hole and the isolation main shaft; the lower end of the second vertical interlock plate contacts and cooperates with the trigger end of the second crank arm, and the upper end of the second vertical interlock plate contacts and cooperates with the closing button.
2. The fully insulated ring main unit with better interlocking function as claimed in claim 1, characterized in that: The first vertical interlocking plate is provided with a first strip guide hole running up and down, and the panel of the cabinet is provided with a first guide column and a first limit column perpendicular to the panel, the first guide column is located in the first strip guide hole, and the first vertical interlocking plate is also provided with a second limit column, the first limit column is located above the second limit column, and a first tension spring is connected between the first limit column and the second limit column; the second vertical interlocking plate is provided with a second strip guide hole running up and down, and the panel of the cabinet is provided with a second guide column and a third limit column perpendicular to the panel, the second guide column is located in the second strip guide hole, and the second vertical interlocking plate is also provided with a fourth limit column, the third limit column is located below the fourth limit column, and a second tension spring is connected between the third limit column and the fourth limit column.
3. The fully insulated ring main unit with better interlocking function as claimed in claim 1, characterized in that: A limit plate is provided on the panel of the cabinet body, the limit plate is perpendicular to the panel, and a third strip guide hole running up and down is provided on the limit plate. The swing arm is located in the third strip guide hole and can swing in the third strip guide hole.
4. The fully insulated ring main unit with better interlocking function as claimed in claim 1, characterized in that: A notch is provided at the upper end of the second vertical interlocking plate, and a slot corresponding to the notch is provided on the closing button. When the upper end of the second vertical interlocking plate contacts and cooperates with the closing button, the notch and the slot are engaged and cooperated.