An electrically propelled circuit breaker core module

Abstract

This utility model relates to the field of power supply switches, specifically an electrically driven circuit breaker core module. It includes an insulating shell, a spring mechanism, a triggering assembly, a protection unit circuit module, a bracket, and a position adjustment mechanism. An input assembly and an output contact are disposed through the insulating shell. The input assembly includes an input contact and a vacuum tube connected to it, with a conductive busbar electrically connecting the vacuum tube and the output contact. The spring mechanism includes a bolt connected to the vacuum tube, a retaining ring at the end of the bolt, two sleeves fitted onto the bolt, and a spring fitted around the outer circumference of the bolt and connected at both ends to the sleeves. The triggering assembly triggers the opening or closing of the contacts inside the vacuum tube via the spring mechanism. This utility model enables control of the opening and closing states and allows for the detachment of the contacts from the connectors during maintenance, ensuring safe maintenance of the core module.

Description

Technical Field

[0001] This utility model relates to the field of power supply switches, and in particular to an electric push-type circuit breaker core module. Background Technology

[0002] Feeder switches have a complete explosion-proof enclosure and can be directly used in power supply systems in underground coal mines. There are two types: vacuum feeder switches and air feeder switches. In mines containing explosive gases and coal dust, feeder switches are needed as main switches or branch switches, and can also be used for infrequent starting control of large-capacity motors.

[0003] Conventional power supply switches are not easy to control in terms of opening and closing status. The circuit breaker core is fixed in position and remains in contact with the connector, making it difficult for personnel to maintain and reducing safety during maintenance. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the background technology by proposing an electric push-type circuit breaker core module. The triggering component triggers the opening or closing of the contacts inside the vacuum tube through a spring mechanism to control the opening and closing state. The position of the entire core module is adjusted by a position adjustment mechanism, and the contacts are detached from the connector during maintenance to ensure that personnel can safely maintain the core module.

[0005] The present invention provides an electric push-type circuit breaker core module, comprising an insulating shell, a spring mechanism, a triggering component, a protection unit circuit module, a bracket, and a position adjustment mechanism. An input component and an output contact are disposed through the insulating shell. The input component includes an input contact and a vacuum tube connected to the input contact. A conductive busbar is electrically connected between the vacuum tube and the output contact. The spring mechanism includes a bolt connected to the vacuum tube, a retaining ring at the end of the bolt, two sleeves fitted on the bolt, and a spring fitted around the outer circumference of the bolt and connected at both ends to the two sleeves respectively. The triggering component triggers the opening or closing of the contacts inside the vacuum tube via the spring mechanism. The protection unit circuit module is disposed on one side of the insulating shell, with a module control line output terminal on the side. The bracket is disposed at the bottom of the insulating shell and the protection unit circuit module. The position adjustment mechanism includes a guide rail, a lead screw, a movable seat slidably disposed on the guide rail and threadedly connected to the lead screw, and a motor driving the lead screw to rotate. The movable seat is disposed at the bottom of the bracket.

[0006] Preferably, the input component, output contact, and spring mechanism are arranged in three sets side by side.

[0007] Preferably, the triggering component includes a limiting component disposed within an insulating shell, a torsion spring sleeved on the limiting component and limited at one end by the limiting component, a permanent magnet cylinder disposed within the insulating shell, a pull block connected to the output shaft of the permanent magnet cylinder and having a strip-shaped channel, a connecting shaft penetrating the strip-shaped channel, a connecting frame rotatably disposed within the insulating shell via a rotating shaft, and a push plate disposed on the connecting frame. The bottom of the push plate has a notch for a retaining ring and a sleeve to extend into. The connecting shaft is disposed on the connecting frame, and the other end of the torsion spring is tensioned on the connecting shaft.

[0008] Preferably, the limiting assembly includes a sleeve rod and a connecting rod disposed within an insulating shell, and a hook platform disposed at the end of the connecting rod. The hook platform has a through hole for inserting one end of a torsion spring, and the torsion spring is sleeved on the outer periphery of the sleeve rod.

[0009] Preferably, a fixing plate is provided inside the insulating shell, an auxiliary contact is provided on the fixing plate, and an insulating plate for triggering the auxiliary contact is provided on the connecting frame.

[0010] Preferably, a current transformer is provided on the output contact, and a voltage transformer, a zero-sequence transformer, a mounting base, and a leakage signal transformer are provided inside the insulating shell. Three RC snubber modules are provided on the mounting base.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] In this invention, the triggering component triggers the opening or closing of the contacts inside the vacuum tube through a spring mechanism to control the opening and closing state. The position adjustment mechanism adjusts the position of the entire core module to leave sufficient space for maintenance operations. During maintenance, the contacts are disconnected from the connector to ensure that personnel can safely perform maintenance on the core module. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 Internal structure diagram;

[0015] Figure 3 This is a partial exploded view of the structure of this utility model;

[0016] Figure 4 This is a partial structural cross-sectional view of the present invention;

[0017] Figure 5 This is a schematic diagram illustrating the principle and structure of the front and rear position adjustment of the circuit breaker core module.

[0018] Figure 6 This is a structural schematic diagram of a circuit breaker core module;

[0019] Figure 7A schematic diagram illustrating the principle of controlling the opening and closing state of internal contacts of a vacuum tube via a permanent magnet cylinder.

[0020] Figure 8 This is a schematic diagram of the internal structure of the circuit breaker core module.

[0021] Reference numerals: 1. Base bracket; 2. Housing 1; 3. Housing 2; 4. Partition 1; 5. Partition 2; 6. Cover plate; 7. Handle; 8. Power cable entry device 1; 9. Incoming terminal; 10. Input conductive busbar; 11. Input connector; 12. Output connector; 13. Output conductive busbar; 14. Outgoing terminal; 15. Power cable entry device 2; 16. Circuit breaker core module; 17. Input contact; 18. Output contact; 19. Vacuum tube; 20. Conductive busbar; 21. Bolt; 22. Retaining ring; 23. Sleeve 1; 24. Sleeve 2; 25. Spring; 26. Push plate; 27. Insulating plate; 28. Connecting frame; 281. Rotating shaft; 29. ​​Connecting shaft; 30. Pull block; 31. Permanent 32. Magnetic cylinder; 33. Torsion spring; 34. Sleeve rod; 35. Connecting rod; 36. Auxiliary contact; 37. Fixing plate; 38. Current transformer; 39. Zero-sequence transformer; 30. Mounting base; 31. RC absorption module; 42. Leakage signal transformer; 43. Protection unit circuit module; 44. Module control line output terminal; 45. Bracket; 46. Guide rail; 47. Lead screw; 48. Locking post; 49. Moving base; 50. Motor; 51. Insertion platform; 42. Hand crank shaft; 53. Tension spring; 54. Base; 55. Front door; 56. Human-machine interface; 57. Button box; 58. Hinge; 59. Connecting block; 50. Mounting plate; 51. Control transformer; 52. Control power fuse; 53. Power switch handle. Detailed Implementation

[0022] like Figures 1-8 As shown, a low-voltage permanent magnet vacuum-fed switch includes a housing and an electrically driven circuit breaker core module.

[0023] like Figures 1-3 As shown, the outer casing includes a base bracket 1, a first housing 2, and a second housing 3. The first housing 2 is mounted on the base bracket 1 and has a main cavity inside. The second housing 3 is mounted on top of the first housing 2 and has a wire cavity inside. The lower part of the second housing 3 has a partition 4 separating the wire cavity and the main cavity. The middle part of the second housing 3 has a partition 5 dividing the wire cavity into an inlet cavity and an outlet cavity. The top of the second housing 3 has a top cover assembly for covering the inlet cavity and the outlet cavity respectively. The top cover assembly includes a cover plate 6 detachably connected to the top of the second housing 3 and a handle 7 welded to the top of the cover plate 6. The cover plate 6 is installed to the top of the second housing 3 by bolts. After unscrewing the bolts, it can be easily removed using the handle 7.

[0024] A front door 51 is hinged to one side of the front end of housing 2 via a hinge 54. A human-machine screen 52 and a button box 53 are installed on the front door 51. The front door 51 is detachably connected to a clip that is snapped onto the front end of housing 2. The clip has a U-shaped structure and can be snapped onto the front end of housing 2. Then, a bolt is screwed on for connection.

[0025] Two power cable entry devices 18 connected to the inlet cavity are respectively provided on both sides of the housing 2 3, and two power cable entry devices 2 15 connected to the outlet cavity are respectively provided on both sides of the housing 2 3. The power cable entry devices are all B5 type cable entry devices, used for power cable access.

[0026] The front side of housing 23 is equipped with five explosion-proof cable entry devices that communicate with the cable outlet cavity. These are two A4 type explosion-proof cable entry devices and three A3 type explosion-proof cable entry devices, used for control line cable access.

[0027] Inside the housing 2 3, on the partition 1 4, there are inlet terminal 9 and outlet terminal 14. Inlet terminal 9 is electrically connected to input conductive bus 10, and input conductive bus 10 is electrically connected to input connector 11. Outlet terminal 14 is electrically connected to output conductive bus 13, and output conductive bus 13 is electrically connected to output connector 12.

[0028] The entire internal space of the casing is divided into a main cavity, an inlet cavity, and an outlet cavity, which isolates the circuit breaker mechanism, the input terminal of the inlet terminal, and the output terminal of the outlet terminal, achieving independent protection. When the front door 51 is opened to inspect the circuit breaker mechanism module 16, the two sets of top cover assemblies cover the inlet cavity and the outlet cavity respectively. When the top cover assembly of the inlet or outlet cavity is opened to inspect the power cable and terminal connection, the front door 51 remains closed. This facilitates separate inspection of the circuit breaker mechanism and separate inspection of the terminal and power cable connection.

[0029] like Figure 1 and Figure 2 As shown, the housing 2 houses a control transformer 57 and a control power fuse 58, while a power switch handle 59 is located externally. The primary side of the control transformer 57 is connected to the incoming terminal 9, and power is obtained from the incoming terminal 9. The secondary side power of the control transformer 57 is connected to the power switch handle 59 via the control power fuse 58.

[0030] The electric push-type circuit breaker core module includes a circuit breaker core module 16 and a position adjustment mechanism.

[0031] like Figure 6 and Figure 7As shown, the circuit breaker mechanism module 16 includes a bracket 42, an insulating shell and a protection unit circuit module 41 mounted on the bracket 42, an input contact 17 and an output contact 18 penetrating the insulating shell, a vacuum tube 19 connected to the input contact 17, a conductive busbar 20 electrically connected between the vacuum tube 19 and the output contact 18, a spring mechanism for opening or closing the internal contacts of the vacuum tube 19, and a triggering component for triggering the spring mechanism. Both the input contact 17 and the output contact 18 are secured to the outside of the insulating shell with thin nuts and spring washers. The input contact 17 forms a circuit with the output contact 18 through the vacuum tube 19 and the conductive busbar 20. By controlling the closing and opening of the vacuum tube 19, the power supply switch can be closed and opened, thus controlling the downstream load. The input contact 17 faces the input connector 11, and the output contact 18 faces the output connector 12. A single input contact 17 and a single vacuum tube 19 constitute a set of input components. Three sets of input components and three sets of output contacts 18 are provided. Correspondingly, three sets of components are provided for the incoming terminal 9, input conductive busbar 10, input connector 11, output connector 12, output conductive busbar 13, outgoing terminal 14, and spring mechanism. The protection unit circuit module 41 is located on one side of the insulating shell. It determines whether to open the switch by analyzing the signal used by the switch. The protection unit circuit module 41 has a module control line outgoing terminal 411 on its side. It is connected to the control line outgoing terminal block in the outgoing cavity through the module control line outgoing terminal 411 to realize the external control of the feeder switch.

[0032] Rotating the power switch handle 59 clockwise from position 0 to position 1 energizes the control circuits of the device's button box 53 and the electric push-type circuit breaker core module. When the power supply switch is closed, pressing the closing button on the button box 53 activates the spring mechanism via the trigger component to close the internal contacts of the vacuum tube 19. The current path is as follows: incoming cables (3 cables) → power cable inlet device 1 8 → incoming terminal 9 → input conductive busbar 10 → input connector 11 (copper sleeve stationary contact, female) → input contact 17 (copper rod moving contact, male) → circuit breaker core module 16 → output contact 18 (copper rod moving contact, male) → output connector 12 (copper sleeve stationary contact, female) → output conductive busbar 13 → outgoing terminal 14 → power cable inlet device 2 15 → outgoing cables (3 cables).

[0033] After the trip button on the button box 53 is pressed, the internal contacts of the vacuum tube 19 are disconnected, and the bus current path is cut off.

[0034] like Figure 7As shown, the spring mechanism includes a bolt 21 connected to the vacuum tube 19, a retaining ring 22 disposed at the end of the bolt 21, a sleeve 23 and a sleeve 24 sleeved on the bolt 21, and a spring 25 sleeved on the outer periphery of the bolt 21 and connected at both ends to the sleeve 23 and the sleeve 24 respectively.

[0035] The triggering assembly includes a limiting component housed within an insulating shell, a torsion spring 32 fitted onto the limiting component and limited at one end by the limiting component, a permanent magnet cylinder 31 housed within the insulating shell, a pull block 30 connected to the output shaft of the permanent magnet cylinder 31 and having a strip-shaped channel, a connecting shaft 29 penetrating the strip-shaped channel, a connecting frame 28 rotatably housed within the insulating shell via a rotating shaft 281, and a push plate 26 mounted on the connecting frame 28. The bottom of the push plate 26 has a notch for the insertion of a retaining ring 22 and a sleeve 23. The connecting shaft 29 is mounted on the connecting frame 28, and the other end of the torsion spring 32 is tensioned on the connecting shaft 29. The limiting component includes a sleeve rod 33 and a connecting rod 34 housed within the insulating shell, and a hook platform at the end of the connecting rod 34. The hook platform has a through hole for one end of the torsion spring 32 to be inserted, and the torsion spring 32 is fitted around the outer periphery of the sleeve rod 33. When the permanent magnet cylinder 31 is not energized, the torsion spring 32 pushes the connecting shaft 29 outward, and the connecting shaft 29 pulls the output shaft of the permanent magnet cylinder 31 outward through the pull block 30. The spring mechanism does not return, and the contacts in the vacuum tube 19 are in the open state.

[0036] like Figure 7 As shown, a fixed plate 36 is installed inside the insulating shell, and an auxiliary contact 35 is installed on the fixed plate 36. An insulating plate 27 that triggers the auxiliary contact 35 is installed on the connecting frame 28. When the closing button on the button box 53 is pressed, the coil inside the permanent magnet cylinder 31 is connected. After the permanent magnet cylinder 31 is energized, its output shaft retracts downward, driving the connecting frame 28 to rotate around the rotating shaft 281 through the pull block 30 and the connecting shaft 29, tightening the torsion spring 32. The connecting frame 28 drives the push plate 26 to move, and the push plate 26 compresses the spring 25, triggering the spring mechanism to rebound and close the disconnected contact in the vacuum tube 19, thus completing the circuit breaker closing. When the circuit breaker closes, the insulating plate 27 moves with the connecting frame 28, and the insulating plate 27 triggers the auxiliary contact 35 to act. The auxiliary contact 35 outputs a switch control signal, transmitting the switch opening and closing signals to other control circuits. The triggering component triggers the opening or closing of the contacts inside the vacuum tube through the spring mechanism, realizing the control of the opening and closing state.

[0037] like Figure 7 and Figure 8As shown, a current transformer 37 is installed on the output contact 18, which is used to sample the switch bus current signal. Inside the insulating housing are a voltage transformer, a zero-sequence transformer 38, a mounting base 39, and a leakage signal transformer 40. The voltage transformer is used to sample the switch bus system voltage signal, the zero-sequence transformer 38 is used to sample the zero-sequence leakage current signal from the switch bus to ground, and the leakage signal transformer 40 is used to sample the zero-sequence leakage voltage signal from the switch bus to ground. Three RC absorption modules 391 are installed on the mounting base 39, which are used to absorb the back electromotive force of the switch tripped load.

[0038] The position adjustment mechanism is housed within the outer casing. This mechanism includes a guide rail 43 within the casing 2, a lead screw 44 rotatably mounted within the casing 2, a movable seat 45 slidably mounted on the guide rail 43 and threadedly connected to the lead screw 44, and a motor 46 driving the lead screw 44. A base 50 is located within the casing 2, with the guide rail 43 specifically mounted on the base 50 and the lead screw 44 rotatably mounted on the base 50. The user controls the motor 46 via a human-machine interface 52 or a button box 53, or remotely controls the motor 46 via an RS485 communication terminal on the wiring port of the machine's wiring compartment through commands from a host computer, controlling the output of the machine's protection unit circuit module 41. The motor 46 drives the lead screw 44 to rotate forward and backward, which in turn moves the movable seat 45, guided linearly by the guide rail 43. A connecting block 55 is provided on the base 50, and a mounting plate 56 is provided on the connecting block 55. The input connectors 11 and output connectors 12 are both provided on the mounting plate 56, and the three side-by-side input connectors 11 are located below the three side-by-side output connectors 12.

[0039] The movable base 45 is located at the bottom of the circuit breaker core module 16, specifically at the bottom of the bracket 42. The movable base 45 drives the circuit breaker core module 16 to move linearly, achieving the purpose of the position adjustment mechanism driving the linear movement of the circuit breaker core module 16. Simultaneously, the input contact 17 is inserted into the input connector 11, and the output contact 18 is inserted into the output connector 12 (at this time, the circuit breaker core module 16 is electrically pushed, and the contacts move to the position of the working limit switch inside the main cavity, allowing normal use of the equipment for closing or opening the circuit breaker); or simultaneously, the input contact 17 is disengaged from the input connector 11, and the output contact 18 is disengaged from the output connector 12 (at this time, the circuit breaker core module 16 is electrically pulled out, and the contacts are disengaged from the connectors, maintaining a safe distance, allowing for equipment maintenance). The position adjustment mechanism adjusts the position of the entire core module, leaving sufficient space for maintenance operations, and disengaging the contacts from the connectors during maintenance ensures that personnel can safely perform maintenance on the core module.

[0040] In addition, a manual adjustment structure can be used to replace the motor 46 to drive the lead screw 44 to rotate, or a manual adjustment structure can be added as an alternative driving method based on the motor 46 drive. Specifically, the manual adjustment structure includes a locking post 441 disposed at the outer end of the lead screw 44, a hand crank shaft 48 passing through the front door 51, a tension spring 49 abutting between the hand crank shaft 48 and the front door 51, and a insertion platform 47 disposed at the end of the hand crank shaft 48. The end of the hand crank shaft 48 has a hexagonal slot, and the locking post 441 has a slot for the insertion platform 47 to be inserted. In manual operation, the user inserts a tool into the hand crank 48, pushes the hand crank 48 forward to compress the tension spring 49, inserts the insertion platform 47 into the slot of the locking post 441, rotates the hand crank 48, and drives the lead screw 44 to rotate through the insertion platform 47 and the locking post 441 to push or pull out the circuit breaker core module 16, inserting the contact into the connector or removing the contact from the connector.

[0041] This invention highly integrates the circuit breaker core and peripheral components of the equipment into a modular unit, solving the problems of loose components, messy wiring between components, high failure rate, and difficulty in disassembly and maintenance due to the dispersed components of conventional power supply switch cores. The six copper rod-type moving contacts extending from the circuit breaker core module 16 and the six copper sleeve-type stationary contacts of the main circuit are tightly fitted by a shaft and sleeve. The shaft and sleeve are operated electrically by pushing and pulling, or manually, ensuring a tight fit. When the circuit breaker core module 16 is electrically pushed and pulled out using the motor 46, the operation of the underground power supply switch can be remotely controlled from the ground, enabling remote debugging and maintenance of mine equipment, achieving unattended operation in the mine, and ensuring high safety.

[0042] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An electrically propelled circuit breaker core module, characterized in that, include: An insulating shell through which an input component and an output contact (18) are disposed. The input component includes an input contact (17) and a vacuum tube (19) connected to the input contact (17). A conductive busbar (20) is electrically connected between the vacuum tube (19) and the output contact (18). The spring mechanism includes a bolt (21) connected to the vacuum tube (19), a retaining ring (22) disposed at the end of the bolt (21), a sleeve one (23) and a sleeve two (24) sleeved on the bolt (21), and a spring (25) sleeved on the outer periphery of the bolt (21) and connected at both ends to the sleeve one (23) and the sleeve two (24) respectively. The triggering component triggers the opening or closing of the internal contacts of the vacuum tube (19) via a spring mechanism; The protection unit circuit module (41) is located on one side of the insulating shell and has a module control line output terminal (411) on the side. A bracket (42) is installed at the bottom of the insulating shell and the protection unit circuit module (41); The position adjustment mechanism includes a guide rail (43), a lead screw (44), a movable seat (45) that is slidably disposed on the guide rail (43) and threadedly connected to the lead screw (44), and a motor (46) that drives the lead screw (44) to rotate. The movable seat (45) is disposed at the bottom of the bracket (42).

2. An electrically propelled circuit breaker core module according to claim 1, characterized in that The input component, output contact (18) and spring mechanism are arranged in three sets side by side.

3. An electrically propelled circuit breaker core module according to claim 1, wherein, The triggering assembly includes a limiting component disposed within an insulating shell, a torsion spring (32) sleeved on the limiting component and limited at one end by the limiting component, a permanent magnet cylinder (31) disposed within an insulating shell, a pull block (30) connected to the output shaft of the permanent magnet cylinder (31) and having a strip-shaped channel, a connecting shaft (29) penetrating the strip-shaped channel, a connecting frame (28) rotatably disposed within an insulating shell via a rotating shaft (281), and a push plate (26) disposed on the connecting frame (28). The bottom of the push plate (26) has a notch into which a retaining ring (22) and a sleeve (23) extend. The connecting shaft (29) is disposed on the connecting frame (28), and the other end of the torsion spring (32) is tensioned on the connecting shaft (29).

4. An electrically propelled circuit breaker core module according to claim 3, wherein, The limiting assembly includes a sleeve rod (33) and a connecting rod (34) disposed within an insulating shell, and a hook platform disposed at the end of the connecting rod (34). The hook platform has a through hole for inserting one end of a torsion spring (32), which is sleeved on the outer periphery of the sleeve rod (33).

5. An electrically propelled circuit breaker core module according to claim 3, wherein, An insulating plate (36) is provided inside the insulating shell, and an auxiliary contact (35) is provided on the fixing plate (36). An insulating plate (27) for triggering the auxiliary contact (35) is provided on the connecting frame (28).

6. An electrically propelled circuit breaker core module according to claim 1, wherein, A current transformer (37) is provided on the output contact (18), and a voltage transformer, a zero-sequence transformer (38), a mounting base (39) and a leakage signal transformer (40) are provided inside the insulating shell. Three RC snubber modules (391) are provided on the mounting base (39).

Images