Three-phase integrated disconnector interlocking device

Abstract

The present invention provides a three-phase integrated disconnector interlocking device, comprising: a wiring board, a conductive bar, an unlocking drive board, a sleeve, a locking hook, an outgoing line wiring board, a guiding bent plate, a pull rod insulator, a support insulator, a rotating shaft, a support frame, an operating handle and a circuit breaker. When the disconnector is in the closed state, the conductive bar forms a lock with the guiding bent plate through the hook. When the disconnector passes a large current, the conductive bar and the contact are mutually locked; when the disconnector performs a switching-off operation, the operating handle is pulled, and the operating handle drives the pull rod insulator to rotate through the rotating shaft; the pull rod insulator is connected to the unlocking drive board. When the pull rod insulator rotates, it pushes the unlocking drive board to move upward; when the unlocking drive board moves upward, it drives the locking hook to rotate, thereby realizing the unlocking operation; when the unlocking drive board continues to rotate upward, the waist-shaped hole on the unlocking drive board pushes the double-headed rivet. The present invention can make the switching-off easier.

Description

Technical Field

[0001] The present invention relates to the technical field of isolating switch interlocking, and relates to a three-phase integrated isolating switch interlocking device, and particularly relates to a three-phase integrated isolating switch structure on an outdoor AC high-voltage circuit breaker. Background Art

[0002] When maintenance is required for outdoor AC high-voltage vacuum circuit breaker equipment, the circuit breaker needs to be tripped. Since the inside of the vacuum arc extinguishing chamber is disconnected and the disconnection point cannot be seen from the outside, if there is a device failure in the circuit breaker itself, it is impossible to accurately judge whether the circuit breaker is reliably tripped from the outside. Thus, a three-phase integrated isolating switch connected to the circuit breaker is added. When the circuit breaker is tripped, the three-phase integrated isolating switch is then opened. At this time, the maintenance personnel can see an obvious isolation disconnection point, ensuring that the energized line has been disconnected, and ensuring that the maintenance personnel can safely perform maintenance work; when the circuit breaker is in the closed state, a mechanical interlock is formed by the closing and opening indicator on the circuit breaker pushing the locking shaft and the limit block on the rotating shaft of the three-phase integrated isolating switch; since there must be a certain gap between the locking shaft and the rotating shaft, this gap will cause the conductive bar on the three-phase integrated isolating switch and the outgoing line connection board to be unable to be reliably connected. When a large current passes through the line, if the conductive bar and the connection board bracket are not in reliable contact at this time, it will cause the contact resistance to be too large, the conductive bar to heat up, the material to soften, and the circuit breaker equipment to trip due to a fault.

[0003] Patent document CN203607316U discloses an isolating switch interlocking device for a high-voltage switch series, which overcomes the problems of large operating force, unreliable interlocking structure, cumbersome operation, and time-consuming and laborious operation existing in the existing high-voltage isolating switch with manual operation. The feature is that an electric mechanism is installed in the mechanism chamber, an isolating crank arm is fixedly connected to the isolating switch, the isolating crank arm is hinged to an upper adjusting sleeve through an upper connecting pin, the upper adjusting sleeve is fixedly connected to the upper end of a pull rod, the mechanism crank arm is hinged to a lower adjusting sleeve through a lower connecting pin, the lower adjusting sleeve is fixedly connected to the lower end of the pull rod, and a manual interlocking mechanism is also installed on the cabinet body. The manual interlocking mechanism is key-connected to the end of the worm and gear reduction transmission mechanism on the electric mechanism through a key groove at the front end of an operating handle. There is still room for improvement in the structure and performance of this patent. Summary of the Invention

[0004] Aiming at the defects in the prior art, the purpose of the present invention is to provide a three-phase integrated isolating switch interlocking device. On the basis of the original interlock, a secondary mechanical interlock between the conductive bar and the outgoing line connection board is realized. Without affecting on-site operation, it ensures reliable contact between the conductive bar on the three-phase integrated isolating switch and the outgoing line connection board, and ensures the safe and reliable operation of the isolating switch on the line.

[0005] A three-phase integrated disconnector interlock device provided by the present invention includes: a wiring board 1, a conductive busbar 2, an unlocking drive board 3, a sleeve 5, a locking hook 7, an outgoing line wiring board 9, a guiding bent plate 10, a pull rod insulator 11, a support insulator 12, a rotating shaft 13, a support frame 14, an operating handle 15, and a circuit breaker 16; the support frame 14 is fixedly connected to the right side of the circuit breaker 16; the rotating shaft 13 is installed in the shaft holes on both sides of the support frame 14; the operating handle 15 is integrally connected to the rotating shaft 13, and rotating the operating handle 15 drives the rotating shaft 13 to rotate; the left end of the conductive busbar 2 is connected to the wiring board 1, and the conductive busbar 2 can freely rotate around the bolt at the connection; the rotating shaft 13 is connected to the pull rod insulator 11; the pull rod insulator 11 is connected to the unlocking drive board 3, and the pull rod insulator can drive the unlocking drive board to perform corresponding actions; the conductive busbar 2 is connected to the unlocking drive board 3; the guiding bent plate 10 is arranged above the support insulator 12; the locking hook 7 is arranged at the connection between the conductive busbar 2 and the outgoing line wiring board 9.

[0006] Preferably, it further includes: a double-headed rivet 4; the pull rod insulator 11 and the unlocking drive board 3 are connected by the double-headed rivet 4; the conductive busbar 2 and the unlocking drive board 3 are riveted together by the double-headed rivet 4.

[0007] Preferably, it further includes: a sleeve 5; the sleeve 5 is connected to the conductive busbar 2.

[0008] Preferably, a limit bolt 8; the guiding bent plate 10 is connected to the limit bolt 8.

[0009] Preferably, it further includes: a locking torsion spring 6; the locking torsion spring 6 is connected to the locking hook 7.

[0010] Preferably, the circuit breaker 16 adopts an outdoor AC high-voltage vacuum circuit breaker.

[0011] Preferably, the left end of the conductive busbar 2 is connected to the wiring board 1 by a bolt; the operating handle 15 and the rotating shaft 13 are integrally connected by a bolt; the support frame 14 is fixedly connected to the right side of the outdoor AC high-voltage vacuum circuit breaker by a bolt.

[0012] Preferably, the rotating shaft 13 includes: a three-phase driving crank arm; the three-phase driving crank arm is fixedly connected to the rotating shaft 13; the three-phase driving crank arm is connected to the lower end of the pull rod insulator 11 through a pin shaft, and the rotating shaft 13 rotates the crank arm to drive the pull rod insulator to move upward.

[0013] Preferably, the unlocking drive board 3 includes: a left end hole of the unlocking drive board; the left end hole of the unlocking drive board can freely rotate through the double-headed rivet 4.

[0014] Preferably, the unlocking drive board 3 includes: an oval hole on the unlocking drive board; the double-headed rivet 4 includes: a first double-headed rivet and a second double-headed rivet; the second double-headed rivet is arranged on the conductive bar 2; the oval hole on the unlocking drive board passes through the second double-headed rivet. The leftmost hole on the unlocking drive board 3 passes through the double-headed rivet and can rotate freely; the oval hole on the unlocking drive board 3 passes through the second double-headed rivet on the conductive bar 2; the second double-headed rivet can move freely within the oval hole of the unlocking drive board 3.

[0015] Compared with the prior art, the novel latching structure provided by the present invention has the following beneficial effects:

[0016] 1. While meeting the latching conditions of the three-phase integrated disconnecting switch and the circuit breaker, the latching between the conductive bar and the outgoing line connection board is added to prevent poor contact between the conductive bar and the support of the outgoing line connection board;

[0017] 2. An ice-breaking function is designed on the hook. When the circuit breaker operates in a low-temperature environment, due to the cold weather, the area around the conductive bar and the outgoing line connection board freezes. When pulling the operating handle for a tripping operation, the unlocking drive board drives the hook to rotate, and the tip on the hook will apply force to the limit bolt, achieving the effect of ice-breaking and making it easier to trip;

[0018] 3. The structure of the present invention is reasonable and easy to use, and can overcome the defects of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objectives, and advantages of the present invention will become more apparent:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the assembly connection between the operating handle and the rotating shaft in the embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of the assembly connection between the support insulator, the guiding bent plate, and the outgoing line connection board in the embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the assembly connection between the support frame, the support insulator, and the rotating shaft in the embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the assembly connection between the pull rod insulator, the conductive bar, and the unlocking drive board in the embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the connection between the hook and the guiding bent plate in the latching and unlocking states in the embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the assembly connection of the three-phase integrated disconnector in the unlocking state, locking state, and opening state in the embodiments of the present invention.

[0027] Figure 8 This is a schematic diagram of the connection when the three-phase integrated disconnector is connected to the circuit breaker, showing the connection states of the disconnector in the closing and locking state, closing and unlocking state, and opening state.

[0028] In the figure:

[0029] 1 - Wiring board 9 - Outlet wiring board

[0030] 2 - Conductive bar 10 - Guide bending plate

[0031] 3 - Unlocking drive plate 11 - Tie rod insulator

[0032] 4 - Double-headed rivet 12 - Support insulator

[0033] 5 - Sleeve 13 - Rotating shaft

[0034] 6 - Locking torsion spring 14 - Support frame

[0035] 7 - Locking hook 15 - Operating handle

[0036] 8 - Limit bolt 16 - Outdoor AC high-voltage vacuum circuit breaker Detailed implementation manners

[0037] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0038] Such as Figure 1-8As shown in the figure, a three-phase integrated disconnector interlock device provided by the present invention includes: a wiring board 1, a busbar 2, an unlocking drive board 3, a sleeve 5, a locking hook 7, an outgoing wiring board 9, a guiding bent plate 10, a pull rod insulator 11, a support insulator 12, a rotating shaft 13, a support frame 14, an operating handle 15, and a circuit breaker 16; the support frame 14 is fixedly connected to the right side of the circuit breaker 16; the rotating shaft 13 is installed at the shaft hole positions on both sides of the support frame 14; the operating handle 15 is integrally connected to the rotating shaft 13, and rotating the operating handle 15 drives the rotating shaft 13 to rotate; the left end of the busbar 2 is connected to the wiring board 1, and the busbar 2 can freely rotate around the bolt at the connection; the rotating shaft 13 is connected to the pull rod insulator 11; the pull rod insulator 11 is connected to the unlocking drive board 3, and the pull rod insulator can drive the unlocking drive board to perform corresponding actions; the busbar 2 is connected to the unlocking drive board 3; the guiding bent plate 10 is arranged above the support insulator 12; the locking hook 7 is arranged at the connection between the busbar 2 and the outgoing wiring board 9.

[0039] A locking structure of a new type of three-phase integrated disconnector. When the disconnector is in the closed state, the busbar forms a lock with the guiding bent plate through a hook. When the disconnector passes through a large current, the busbar and the contact are locked with each other, and the knife bar and the contact will not be separated due to the electrodynamic force, thus causing a safety accident; when the disconnector performs a disconnection operation, pull the operating handle, and the operating handle drives the pull rod insulator to rotate through the rotating shaft; the pull rod insulator is connected to the unlocking drive board. When the pull rod insulator rotates, it pushes the unlocking drive board to move upward; when the unlocking drive board moves upward, it drives the locking hook to rotate, thereby realizing the unlocking operation; when the unlocking drive board continues to rotate upward, the waist-shaped hole on the unlocking drive board pushes the double-headed rivet 4, and the double-headed rivet drives the busbar to rotate upward, thereby realizing the disconnection operation.

[0040] The present invention relates to a three-phase integrated disconnector. When in the closed state, a locking structure is formed with the guiding bent plate on the support insulator through a hook to ensure reliable contact between the busbar and the outgoing wiring board, enabling the equipment to operate reliably outdoors.

[0041] On the basis of the original locking structure of the new type of disconnector, a new hook locking function is added for each phase isolation break; when the disconnector is in the closed state, hook locking is designed at the position of the busbar and the outgoing wiring board. When the locking connecting rod on the rotating shaft is disengaged, there is still hook locking to ensure reliable contact between the busbar of the disconnector and the outgoing wiring board; thus ensuring the safe and reliable operation of the equipment outdoors.

[0042] The new disconnecting switch is designed with a crowbar device at the hook position. When the equipment is in an extremely cold outdoor environment and the conductive bar is frozen by ice, pulling the operating handle drives the rotating shaft to rotate. The rotating shaft drives the pull-rod insulator to push the unlocking drive plate to pry open the ice layer, thus realizing the ice-breaking function and facilitating on-site operation.

[0043] Preferably, it further includes: a double-headed rivet 4; the pull-rod insulator 11 is connected to the unlocking drive plate 3 through the double-headed rivet 4; the conductive bar 2 and the unlocking drive plate 3 are riveted together through the double-headed rivet 4.

[0044] Preferably, it further includes: a sleeve 5; the sleeve 5 is connected to the conductive bar 2.

[0045] Preferably, a limit bolt 8; the guiding bent plate 10 is connected to the limit bolt 8.

[0046] Preferably, it further includes: a locking torsion spring 6; the locking torsion spring 6 is connected to the locking hook 7.

[0047] Preferably, the circuit breaker 16 adopts an outdoor AC high-voltage vacuum circuit breaker.

[0048] Preferably, the left end of the conductive bar 2 is connected to the wiring board 1 through a bolt; the operating handle 15 and the rotating shaft 13 are connected into one body through a bolt; the support frame 14 is firmly connected to the right side of the outdoor AC high-voltage vacuum circuit breaker through a bolt.

[0049] Preferably, the rotating shaft 13 includes: a three-phase driving crank arm; the three-phase driving crank arm is fixedly connected to the rotating shaft 13; the three-phase driving crank arm is connected to the lower end of the pull-rod insulator 11 through a pin shaft, and the rotating shaft 13 rotates to drive the crank arm to drive the pull-rod insulator to move upward.

[0050] Preferably, the unlocking drive plate 3 includes: a left-end hole of the unlocking drive plate; the left-end hole of the unlocking drive plate can rotate freely through the double-headed rivet 4.

[0051] Preferably, the unlocking drive plate 3 includes: a waist-shaped hole of the unlocking drive plate; the double-headed rivet 4 includes: a first double-headed rivet and a second double-headed rivet; the second double-headed rivet is arranged on the conductive bar 2; the waist-shaped hole of the unlocking drive plate passes through the second double-headed rivet. The leftmost hole of the unlocking drive plate 3 can rotate freely through the double-headed rivet; the waist-shaped hole on the unlocking drive plate 3 passes through the second double-headed rivet on the conductive bar 2; the second double-headed rivet can move freely in the waist-shaped hole of the unlocking drive plate 3.

[0052] While meeting the interlocking conditions between the three-phase integrated disconnector and the circuit breaker, an interlock between the busbar and the outgoing line terminal board is added to prevent poor contact between the busbar and the support of the outgoing line terminal board. An ice-breaking function is designed on the hook. When the circuit breaker operates in a low-temperature environment, due to cold weather, the area around the busbar and the outgoing line terminal board freezes. When pulling the operating handle for a tripping operation, the unlocking drive plate drives the hook to rotate, and the tip on the hook exerts force on the limit bolt to achieve the effect of ice-breaking, making it easier to trip. The structure of the present invention is reasonable and convenient to use, and can overcome the defects of the prior art.

[0053] When the outdoor AC high-voltage vacuum circuit breaker conducts a large-current breaking test, the three-phase integrated disconnector and the circuit breaker are in the closed state. The operating handle of the conventional three-phase integrated disconnector drives the locking rod through the circuit breaker closing and opening indicator to form a locked state. At this time, there is no direct interlock between the busbar and the outgoing line terminal board. When the circuit breaker conducts a breaking test, a large current will flow through the busbar of the disconnector, causing electrodynamic force. Since the conventional three-phase integrated disconnector only has an operating lock on the operating shaft and there must be a certain gap, due to the gap between the busbar and the outgoing line terminal board, loosening occurs, resulting in poor contact, an increase in loop resistance, overheating, and the fusion of the busbar and the outgoing line terminal board, making it impossible to perform a tripping operation and leading to the failure of the experiment. When an interlocking structure is added between the busbar and the terminal board to ensure reliable contact between the busbar and the outgoing line terminal board, the electrodynamic force generated when a large current passes through cannot separate the busbar from the outgoing line terminal board, and the above-mentioned test hazards will not occur, ensuring that the breaking test can pass smoothly.

[0054] Those skilled in the art know that in addition to implementing the system and its various devices, modules, and units provided by the present invention in the form of pure computer-readable program code, the method steps can be logically programmed to enable the system and its various devices, modules, and units provided by the present invention to be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers to achieve the same functions. Therefore, the system and its various devices, modules, and units provided by the present invention can be regarded as a hardware component, and the devices, modules, and units included therein for implementing various functions can also be regarded as the structure within the hardware component; the devices, modules, and units for implementing various functions can also be regarded as both software modules for implementing the method and the structure within the hardware component.

[0055] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0056] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

Claims

1. A three-phase integrated disconnector interlocking device, characterized in that Comprising: A wiring board (1), a busbar (2), an unlocking drive board (3), a locking hook (7), an outgoing wiring board (9), a guiding bent plate (10), a pull rod insulator (11), a support insulator (12), a rotating shaft (13), a support frame (14), an operating handle (15) and a circuit breaker (16); The support frame (14) is fixedly connected to the right side of the circuit breaker (16); The rotating shaft (13) is installed in the shaft holes on both sides of the support frame (14); The operating handle (15) is integrally connected with the rotating shaft (13); The left end of the busbar (2) is connected to the wiring board (1); The rotating shaft (13) is connected to the pull rod insulator (11); The pull rod insulator (11) is connected to the unlocking drive board (3); A connection is made between the busbar (2) and the unlocking drive board (3); The guiding bent plate (10) is arranged above the support insulator (12); The locking hook (7) is arranged at the connection between the busbar (2) and the outgoing wiring board (9); Also included: a double-headed rivet (4); The pull rod insulator (11) and the unlocking drive board (3) are connected by the double-headed rivet (4); A riveting connection is made between the busbar (2) and the unlocking drive board (3) through the double-headed rivet (4); Also included is a limit bolt (8); The guiding bent plate (10) is connected to the limit bolt (8); In the closing state, the busbar (2) forms a lock with the guiding bent plate (10) through the locking hook (7); During the opening operation, pulling the operating handle (15), the operating handle (15) drives the pull rod insulator (11) to rotate through the rotating shaft (13). The pull rod insulator (11) is connected to the unlocking drive board (3). When the pull rod insulator (11) rotates, it pushes the unlocking drive board (3) to move upward. When the unlocking drive board (3) moves upward, it drives the locking hook (7) to rotate to achieve unlocking. When the unlocking drive board (3) continues to rotate upward, the waist-shaped hole on the unlocking drive board (3) pushes the double-headed rivet (4), and the double-headed rivet (4) drives the busbar (2) to rotate upward to achieve opening; A crowbar device is arranged on the locking hook (7) and is used to pull the operating handle (15) when the busbar (2) is frozen by ice, drive the rotating shaft (13) to rotate, and the rotating shaft (13) drives the pull rod insulator (11) to push the unlocking drive board (3) to pry the ice layer.

2. The three-phase integrated disconnector interlocking device according to claim 1, characterized in that, Also included: A sleeve (5); The sleeve (5) is connected to the busbar (2).

3. The three-phase integrated disconnector interlocking device according to claim 1, wherein Also included: A locking torsion spring (6); The locking torsion spring (6) is connected to the locking hook (7).

4. The three-phase integrated disconnector interlocking device according to claim 1, characterized in that, The circuit breaker (16) uses an outdoor AC high-voltage vacuum circuit breaker.

5. The three-phase integrated disconnector interlocking device according to claim 1, characterized in that, The left end of the busbar (2) is connected to the wiring board (1) through bolts; The operating handle (15) and the rotating shaft (13) are integrally connected through bolts; The support frame (14) is fixedly connected to the right side of the circuit breaker (16) through bolts.

6. The three-phase integrated disconnector interlocking device according to claim 1, characterized in that The rotating shaft (13) includes: a three-phase driving crank arm; The three-phase driving crank arm is fixedly connected to the rotating shaft (13); The three-phase driving crank arm is connected to the lower end of the pull rod insulator (11) through a pin shaft.

7. The three-phase integrated disconnector interlocking device according to claim 1, characterized in that, The unlocking drive board (3) includes: a hole at the left end of the unlocking drive board; The hole at the left end of the unlocking drive board passes through the double-headed rivet (4).

8. The three-phase integrated disconnector interlocking device according to claim 7, wherein, The unlocking drive board (3) includes: an oblong hole on the unlocking drive board; The double-headed rivet (4) shown includes: a first double-headed rivet and a second double-headed rivet; The second double-headed rivet is arranged on the conductive bar (2); The oblong hole on the unlocking drive board passes through the second double-headed rivet.

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