Knife switch mechanism capable of replacing molded case circuit breaker without power cut
By designing a knife switch mechanism that replaces the plastic case circuit breaker without power outage, and using the bypass connection component and the knife switch component to connect the circuit of the circuit breaker, the problem of traditional methods requiring power outage for maintenance is solved, and the circuit breaker replacement and maintenance in the absence of power outage is realized, which improves maintenance efficiency and safety.
Patent Information
- Application Number
- CN202421017593.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-10
AI Technical Summary
When maintenance or replacement of plastic case circuit breakers is required, traditional methods require power outage, which will not be able to operate without power outage, especially in companies such as metallurgy, chemical industry, and medical care that cannot be power outage, which may cause great losses.
A knife switch mechanism for replacing the plastic case circuit breaker without power outage is designed, including a base and multiple sets of bypass connection components, each set of bypass connection components corresponding to each of the circuit breaker. The circuits at the inlet and outlet ends of the circuit breaker are connected by the bypass connection component, and the circuit is connected by the knife switch component to ensure that the circuit remains in communication when maintaining or replacing the circuit breaker.
It realizes the replacement or maintenance of plastic case circuit breakers without power outage, avoids losses such as equipment shutdown and production caused by power outage, and improves the maintenance efficiency and safety of circuit breakers.
Smart Images
Figure CN222619665U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to a knife switch mechanism for replacing a molded case circuit breaker without power outage. Background Art
[0002] A circuit breaker is a switching device that can close, carry and interrupt the current under normal circuit conditions and can close, carry and interrupt the current under abnormal circuit conditions within a specified time; the circuit breaker mainly distributes electrical energy, protects lines and power equipment from hazards such as overload, short circuit and undervoltage, and reliably ensures the safety of electrical equipment and personnel. The safe operation of lines and power equipment is directly related to the circuit breaker.
[0003] When the circuit breaker needs maintenance, overhaul and replacement, the traditional approach is to cut off the power supply line and shut down the lower-level power-consuming equipment. For some non-essential equipment, the traditional approach can be used to handle the circuit breaker. However, for some enterprises that cannot shut down the power (for example, metallurgy, chemical industry, medical treatment, etc.), it may cause greater losses.
[0004] There is an urgent need to provide a better mechanism so that the molded case circuit breaker can be replaced or maintained without power outage. Utility Model Content
[0005] Based on the above description, the utility model provides a knife switch mechanism for replacing a molded case circuit breaker without power outage, so as to replace or maintain the molded case circuit breaker without power outage.
[0006] The technical solution of the utility model to solve the above technical problems is as follows: a knife switch mechanism for replacing a molded case circuit breaker without power outage, comprising a base and a plurality of groups of bypass connection components, each group of the bypass connection components corresponding to each phase of the circuit breaker;
[0007] The bypass connection assembly includes an incoming line connection row, an outgoing line connection row and a switch assembly, the base is connected to the housing of the circuit breaker, the incoming line connection row is electrically connected to the incoming line terminal of the circuit breaker, and the outgoing line connection row is electrically connected to the outgoing line terminal of the circuit breaker;
[0008] The knife switch assembly comprises a knife switch connecting row, a knife switch rotating shaft and a rotating knife switch, wherein the knife switch rotating shaft is rotatably connected to the knife switch connecting row, and the rotating knife switch is detachably fixedly connected to the knife switch rotating shaft;
[0009] One end of the knife switch connection row away from the knife switch rotating shaft is electrically connected to the outgoing line connection row.
[0010] Through the above technical scheme, the knife switch assembly can connect the circuits at the incoming and outgoing ends of the molded case circuit breaker. After the knife switch assembly is closed, when the circuit breaker is maintained, the knife switch assembly keeps the circuit connected, so that the molded case circuit breaker can be replaced or maintained without power outage; the knife switch shaft can drive the rotating knife switch to rotate so as to close or disconnect the knife switch assembly.
[0011] On the basis of the above technical solution, the present invention can also be improved as follows.
[0012] Furthermore, an outgoing line connection plate is provided at one end of the knife switch connection row close to the outgoing line connection row, and the outgoing line connection plate is arranged in an "L" shape;
[0013] The outlet connection plate is provided with an outlet connection threaded hole, and the outlet connection row is provided with an outlet connection through hole corresponding to the outlet connection threaded hole.
[0014] Through the above technical solution, bolts can be used to penetrate the outgoing line connection through holes and connect with the outgoing line connection threaded holes, so as to connect the knife switch connection row and the outgoing line connection row together.
[0015] Furthermore, a support column is provided on the base, a positioning hole is opened on the support column, and positioning studs inserted into the positioning holes are provided on the outgoing line connection row and the incoming line connection row.
[0016] Furthermore, the rotary knife gate comprises two knife gate plates arranged symmetrically, a limit screw penetrating the knife gate plates and a compression spring sleeved on the limit screw, and both ends of the limit screw are threadedly matched with nuts;
[0017] The two ends of the compression spring are respectively in contact with the knife gate plate and the nut;
[0018] A guiding slope is arranged on one side opposite to the two knife gate plates, and a plug-in board is extended on one side of the incoming line connection row facing the rotary knife gate, and the plug-in board can be inserted between the two knife gate plates.
[0019] Furthermore, a rotating connection ear plate is provided at one end of the knife switch connection row close to the rotating knife switch, a connection groove is provided on the knife switch connection row, and the rotating connection ear plate is inserted into the connection groove;
[0020] A rotation-stopping plane is arranged on the side of the knife gate rotating shaft, and a shaft-through hole which is arranged in the shape of a cross section of the knife gate rotating shaft is opened on the knife gate plate.
[0021] Furthermore, a toggle handle is connected to the knife switch rotating shaft, and the toggle handle is made of insulating material.
[0022] Furthermore, a clamping groove is provided on one side of the base facing the knife switch connecting plate, and the knife switch connecting plate is inserted into the clamping groove.
[0023] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0024] 1. The rotary knife switch in the knife switch assembly can connect the circuit of the knife switch connection row with the incoming line connection row, thereby connecting the circuit of the incoming line connection row with the outgoing line connection row, so that when the circuit breaker is maintained or replaced, the original circuit can still be in a connected state;
[0025] 2. The knife switch shaft and the rotating knife switch are connected together. When the knife switch shaft is rotated, all the knife gates can be driven to close so that each phase circuit in the circuit breaker can be connected. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 A schematic structural diagram of a knife switch mechanism for replacing a molded case circuit breaker without power outage provided by an embodiment of the utility model and cooperating with the circuit breaker;
[0027] Figure 2 It is a schematic diagram of the overall structure of the knife switch assembly of the embodiment of the utility model;
[0028] Figure 3 A top view of a knife switch assembly according to an embodiment of the utility model;
[0029] Figure 4 for Figure 3 A schematic cross-sectional view of AA;
[0030] Figure 5 for Figure 3 A schematic cross-sectional view of BB;
[0031] Figure 6 It is a structural schematic diagram of a knife switch assembly according to an embodiment of the utility model;
[0032] Figure 7 The figure is a schematic structural diagram of an outlet connection plate and an outlet connection row according to an embodiment of the utility model.
[0033] Reference numerals: 1. base;
[0034] 3. Incoming line connection row; 31. Plug-in board;
[0035] 4. Outgoing line connection row; 41. Outgoing line connection through hole; 42. Positioning stud;
[0036] 5. Knife switch assembly; 51. Knife switch connection row; 512. Rotating connection ear plate; 513. Connection groove;
[0037] 52, knife switch shaft; 521, anti-rotation plane; 522, toggle handle;
[0038] 53. Rotating knife switch; 531. Guide ramp;
[0039] 54. Outlet connection plate; 55. Outlet connection threaded hole; 56. Knife gate; 57. Limit screw; 58. Compression spring; 59. Adjustment nut;
[0040] 6. Support column; 61. Positioning hole;
[0041] 7. Snap-in slot; 8. Molded case circuit breaker. DETAILED DESCRIPTION
[0042] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0044] Example:
[0045] refer to Figure 1 A knife switch mechanism for replacing a molded case circuit breaker without power outage comprises a base 1 and a plurality of bypass connection components, each bypass connection component corresponding to each phase of the circuit breaker; through the bypass connection components, the lines at both ends of the circuit breaker inlet and outlet can be connected so that the circuit is not affected when the circuit breaker is removed, thereby realizing the replacement of the molded case circuit breaker without power outage.
[0046] refer to Figure 1 and Figure 2 The bypass connection assembly includes an incoming line connection row 3, an outgoing line connection row 4 and a knife switch assembly 5. The base 1 is fixedly connected to the housing of the circuit breaker by bolts or is fixedly connected to the bracket of the electrical cabinet by bolts. The base 1 is made of insulating plastic or other insulating materials; the incoming line connection row 3 is electrically connected to the incoming line end of the circuit breaker, and the outgoing line connection row 4 is electrically connected to the outgoing line end of the circuit breaker; the knife switch assembly 5 is used to connect and disconnect the circuit. When the knife switch assembly 5 is in a closed state, the circuit can remain connected when the circuit breaker is maintained.
[0047] refer to Figure 2 and Figure 4The knife switch assembly 5 includes a knife switch connecting row 51, a knife switch rotating shaft 52 and a rotating knife switch 53. The knife switch rotating shaft 52 is rotatably connected to the knife switch connecting row 51, and the rotating knife switch 53 is detachably fixedly connected to the knife switch rotating shaft 52; a clamping groove 7 is provided on the side of the base 1 facing the knife switch connecting row 51, and the knife switch connecting row 51 can be inserted into the clamping groove 7, thereby limiting the position of the knife switch connecting row 51, so that the knife switch connecting row 51 can be installed more stably.
[0048] refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 A plurality of support columns 6 are fixedly arranged on the base 1, and positioning holes 61 are opened on the support columns 6. Positioning studs 42 inserted into the positioning holes 61 are arranged on the outgoing connection row 4 and the incoming connection row 3; the positioning holes 61 can limit the positions of the outgoing connection row 4 and the incoming connection row 3, so as to more conveniently install the outgoing connection row 4 and the incoming connection row 3.
[0049] refer to Figure 6 A rotating connecting ear plate 512 is provided at one end of the knife gate connecting row 51 close to the rotating knife gate 53, and a connecting groove 513 is opened on the knife gate connecting row 51, and the rotating connecting ear plate 512 is inserted into the connecting groove 513; the knife gate connecting row 51 is processed by a stamping process, wherein the connecting groove 513 can be formed by integral punching, and after the rotating connecting ear plate 512 is inserted into the connecting groove 513, the rotating connecting ear plate 512 and the knife gate connecting row 51 are welded together.
[0050] refer to Figure 2 and Figure 6 The side of the knife gate shaft 52 is provided with a stop plane 521, and two stop planes 521 are symmetrically arranged. The knife gate shaft 52 passes through the rotating connection ear plate 512, and the knife gate shaft 52 rotates with the rotating connection ear plate 512; the rotating knife gate 53 includes two symmetrically arranged knife gate plates 56, a limit screw 57 passing through the knife gate plates 56 and a compression spring 58 sleeved on the limit screw 57, both ends of the limit screw 57 are threadedly matched with an adjusting nut 59, and the two ends of the compression spring 58 are respectively abutted against the knife gate plates 56 and the adjusting nut 59; the length of the compression spring 58 can be adjusted by rotating the adjusting nut 59, thereby adjusting the clamping force of the knife gate plates 56, so that the knife gate plates 56 can clamp the plug-in board 31 with a more appropriate clamping force; the knife gate plates 56 are provided with a through-axis hole that is arranged in the shape of the cross section of the knife gate shaft 52, and when the knife gate shaft 52 rotates, the knife gate plates 56 can be driven to rotate.
[0051] refer to Figure 2 , Figure 3 , Figure 4 and Figure 5A guide slope 531 is provided on the opposite side of the two knife gate plates 56, and a plug-in board 31 is extended from the side of the incoming line connection row 3 toward the rotating knife gate 53, and the plug-in board 31 can be inserted between the two knife gate plates 56; a toggle handle 522 is connected to the knife gate rotating shaft 52, and the toggle handle 522 is made of insulating material; the rotating knife gate 53 can be rotated by toggling the handle 522 so that the knife gate plate 56 can be closed.
[0052] refer to Figure 6 and Figure 7 An outgoing line connection plate 54 is provided at one end of the knife switch connection row 51 close to the outgoing line connection row 4, and the outgoing line connection plate 54 is arranged in an "L" shape; an outgoing line connection threaded hole 55 is opened on the outgoing line connection plate 54, and an outgoing line connection through hole 41 corresponding to the outgoing line connection threaded hole 55 is provided on the outgoing line connection row 4.
[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A switch mechanism for replacing a molded case circuit breaker without power outage, characterized in that: It comprises a base (1) and a plurality of groups of bypass connection components, each group of the bypass connection components corresponds to each phase of the circuit breaker; The bypass connection assembly comprises an incoming line connection row (3), an outgoing line connection row (4) and a switch assembly (5); the base (1) is connected to the housing of the circuit breaker; the incoming line connection row (3) is electrically connected to the incoming line end of the circuit breaker; and the outgoing line connection row (4) is electrically connected to the outgoing line end of the circuit breaker; The knife switch assembly (5) comprises a knife switch connection row (51), a knife switch rotating shaft (52) and a rotating knife switch (53); the knife switch rotating shaft (52) is rotatably connected to the knife switch connection row (51); and the rotating knife switch (53) is detachably fixedly connected to the knife switch rotating shaft (52); One end of the knife switch connection row (51) away from the knife switch rotating shaft (52) is electrically connected to the outlet line connection row (4).
2. The knife switch mechanism for replacing a molded case circuit breaker without power outage according to claim 1 is characterized in that: An outgoing line connection plate (54) is provided at one end of the knife switch connection row (51) close to the outgoing line connection row (4), and the outgoing line connection plate (54) is arranged in an "L" shape; The outgoing line connection plate (54) is provided with an outgoing line connection threaded hole (55), and the outgoing line connection row (4) is provided with an outgoing line connection through hole (41) corresponding to the outgoing line connection threaded hole (55).
3. The knife switch mechanism for replacing a molded case circuit breaker without power outage according to claim 1, characterized in that: The base (1) is provided with a support column (6), the support column (6) is provided with a positioning hole (61), and the outlet connection row (4) and the inlet connection row (3) are provided with positioning studs (42) inserted into the positioning hole (61).
4. The knife switch mechanism for replacing a molded case circuit breaker without power outage according to claim 1, characterized in that: The rotary knife gate (53) comprises two knife gate plates (56) arranged symmetrically, a limiting screw (57) penetrating the knife gate plates (56) and a compression spring (58) sleeved on the limiting screw (57), and both ends of the limiting screw (57) are threadedly matched with an adjusting nut (59); The two ends of the compression spring (58) are respectively in contact with the knife gate plate (56) and the adjusting nut (59); A guiding inclined surface (531) is provided on one side opposite to the two knife gate plates (56); a plug-in board (31) is extended from the side of the incoming line connection row (3) facing the rotary knife gate (53); and the plug-in board (31) can be inserted between the two knife gate plates (56).
5. The knife switch mechanism for replacing a molded case circuit breaker without power outage according to claim 4, characterized in that: A rotating connection ear plate (512) is provided at one end of the knife switch connection row (51) close to the rotating knife switch (53); a connection groove (513) is provided on the knife switch connection row (51), and the rotating connection ear plate (512) is inserted into the connection groove (513); A rotation-stopping plane (521) is provided on the side of the knife gate rotating shaft (52), and a shaft-through hole which is arranged in the shape of the cross section of the knife gate rotating shaft (52) is provided on the knife gate plate (56).
6. The knife switch mechanism for replacing a molded case circuit breaker without power outage according to claim 5, characterized in that: The knife switch rotating shaft (52) is connected to a toggle handle (522), and the toggle handle (522) is made of insulating material.
7. The knife switch mechanism for replacing a molded case circuit breaker without power outage according to claim 1, characterized in that: A clamping groove (7) is provided on one side of the base (1) facing the knife switch connection row (51), and the knife switch connection row (51) is inserted into the clamping groove (7).