CN218299698U

CN218299698U - Reclosing device

Info

Publication number: CN218299698U
Application number: CN202220915747.XU
Authority: CN
Inventors: 黄生华; 王国博; 蔡昊; 丁建龙
Original assignee: China Shipbuilding Anzhi Hubei Technology Co ltd
Current assignee: China Shipbuilding Anzhi Hubei Technology Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2023-01-13
Anticipated expiration: 2032-04-20

Abstract

The utility model discloses a reclosing device sets up on the mounting bracket of reclosing lock ware insulating base upper end, and reclosing device still is provided with the guide structure who corresponds with the limit structure of mounting bracket including breaking coincidence unit, locking unit, monitor control unit and electrical unit on the reclosing device, and reclosing device installs back on the mounting bracket, and the guide structure card prevents that the relative mounting bracket of reclosing device from transversely rocking in the limit structure of mounting bracket. The utility model discloses a reclosing lock device detachable hangs the dress on the mount pad of reclosing lock ware, is convenient for install and maintain.

Description

Reclosing device

Technical Field

The utility model relates to a line protection device in the power transmission network, concretely relates to reclosing device.

Background

At present, most transient faults occur on branch lines of a distribution line in a 10kV power system, and in order to reduce the loss of the faults to users and the influence on the branch lines, a drop-out fuse is often used as a short-circuit protection switch. When the drop-out fuse is used for quick-break protection on a branch line of a distribution line, all faults in a protection range are cut off, so that all users on the branch line are forced to cut off the power; when the drop-out fuse is used as backup protection, although the branch fault can be prevented from being protected each time, all users on the main line experience instantaneous power interruption, and the drop-out fuse cannot be used in a large fault current area.

In the power transmission and distribution system, the reclosing device is used as a fault interrupting device, can be automatically opened or closed according to a set program, can effectively isolate faults, and can enable a fault line to be closed again after the faults are cleared. In a 10kV or above power system, most transient faults occur on a distribution line branch line, and the drop-out reclosing device can be used as a short-circuit protection switch, and drops out after a preset number of fault interruption operations to form an obvious disconnection point so as to cut off a fault section line or fault equipment. However, the drop-out reclosing device has a large self weight, is generally installed outdoors and is influenced by natural environment, and the safety reliability, the resetting and the maintenance operation convenience of the drop-out reclosing device need to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above-mentioned background existence not enough, provide a reclosing device, reclosing device compact structure just conveniently dismantles and installs.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a reclosing device, sets up on the mounting bracket of reclosing device insulating base upper end, and reclosing device includes cut-off coincidence unit, locking unit, monitor control unit and electrical unit, still be provided with the guide structure who corresponds with the limit structure of mounting bracket on the reclosing device, reclosing device installs back on the mounting bracket, the guide structure card is in the limit structure of mounting bracket, prevent reclosing device is relative the mounting bracket transversely rocks.

According to the scheme, the guide structure is two pairs of positioning columns.

According to the scheme, the power supply unit comprises a capacitor, one end of the capacitor is electrically connected with the input end of the power transmission line, and the other end of the capacitor is grounded.

According to the scheme, the on-off coincidence unit comprises a first driver, a driving rod and a vacuum circuit breaker, a moving contact of the vacuum circuit breaker is fixedly connected with the driving rod, the moving contact is electrically connected with an input end, specifically, the moving contact is electrically connected with a support through a flexible cable, the support is electrically connected with a mounting frame, and the mounting frame is electrically connected with the input end.

According to the scheme, the locking unit comprises a second driver, a push rod and a rotating piece, the rotating piece is arranged at the bottom of the reclosing device, one side of the rotating piece is abutted to the push rod, the other side of the rotating piece is provided with a contact, a torsion spring is further arranged on the rotating piece, one end of the torsion spring is pressed on the rotating piece, and the other end of the torsion spring is pressed on a shell of the reclosing device.

According to the scheme, the on-off coincidence unit comprises a vacuum circuit breaker, the contact is electrically connected with a static contact of the vacuum circuit breaker through a flexible electric connection piece, and the flexible electric connection piece is an arc-shaped soft copper plate.

According to the scheme, the bottom of the reclosing device is also provided with a limiting pipe, a capacitor binding post is sleeved in the limiting pipe, a spring is further arranged between the capacitor binding post and the limiting pipe, the reclosing device is installed on the mounting frame of the reclosing device, and the capacitor binding post is tightly pressed with the fixing frame of the insulation base of the reclosing device through the spring.

According to the scheme, the tail end of the limiting pipe is provided with the tapered hole corresponding to the tapered boss, and after the reclosing device is hung on the mounting frame, the tapered hole at the tail end of the limiting pipe can be clamped on the tapered boss of the mounting frame.

The embodiment of the utility model provides a reclosing lock device installs on the mounting bracket of reclosing lock ware insulating base upper end, and the action process of reclosing lock ware is as follows:

the monitoring control unit detects the current of the power transmission line and judges whether the power transmission line has a fault or not, when the power transmission line has the fault, the first driver is driven to work, so that the vacuum circuit breaker is disconnected, and the vacuum circuit breaker is closed again after the fault is cleared or under a set condition; after the vacuum circuit breaker is opened and closed for a plurality of times, the power transmission line is still current abnormal, and the monitoring control unit drives the second driver to work again, so that the falling part falls, a visual fracture is formed, and the maintenance personnel can conveniently maintain.

Compared with the prior art, the beneficial effects of the utility model are that:

the reclosing device of the drop-out reclosing device is arranged on the insulating base, so that the weight of a drop-out part is greatly reduced, and the resetting and the maintenance operation are more convenient.

Drawings

Fig. 1 is a three-dimensional view of a reclosing device according to an embodiment of the present invention installed on a mounting bracket of the reclosing device;

fig. 2 is a schematic diagram of the reclosing device before and after installation;

FIG. 3 is a front view of the recloser;

fig. 4 is a schematic view of the recloser in a shut-off condition after the drop member of fig. 2 has fallen;

FIG. 5 is a schematic diagram of a reclosing device;

FIG. 6 is an enlarged partial view of region I of FIG. 5;

FIG. 7 is an enlarged partial view of region II of FIG. 5;

fig. 8 is a partially enlarged schematic view of a region III in fig. 5.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The distribution lines is used as an example below, refer to fig. 1 to fig. 8, and explain the reclosing device of the embodiment of the present invention, the embodiment of the present invention is installed on the installation rack of the reclosing device.

As shown in fig. 1 and fig. 2, reclosing device includes insulating base 1, reclosing device 2, fall a 7, the upper and lower both ends of insulating base 1 are input 3 and output 5 of power transmission line respectively, insulating base 1 upper end sets up mounting bracket 4, mounting bracket 4 is connected with input 3 electricity, reclosing device 2 sets up on mounting bracket 4, insulating base's lower extreme still is provided with backup pad 6, backup pad 6 is connected with output 5 electricity, the one end that falls a 7 rotationally installs in backup pad 6, the other end joint that falls a is on reclosing device 2.

Compared with the prior art, the reclosing device 2 is separated from the falling piece 7 and transferred to the upper end of the insulating base 1, so that the weight of the falling piece is greatly reduced, and the falling piece 7 is convenient to reset.

As shown in fig. 2 and 4, a limiting structure 38 is arranged on the mounting frame 4, the reclosing device 2 includes a housing, a guide structure 37 is arranged on the housing 9, and the reclosing device 2 can be conveniently installed and removed from the mounting frame 4 through the limiting structure 38 and the guide structure 37, so that installation and maintenance in the actual use process are facilitated. The limiting structure 38 of this embodiment is specifically a vertical limiting guide groove, the guiding structure 37 is specifically two pairs of positioning columns, the limiting structure 38 may also be a frame shape or other shapes, and the guiding structure 37 at this time is the corresponding shape.

As shown in fig. 4, a bracket 10 is disposed on the housing 9 of the reclosing device 2, the guide structure 37 is fixed on the bracket 10, a hook 31 is further disposed on the top of the bracket 10, and the reclosing device 2 can be removed from the mounting bracket 4 by hooking the hook 31 with a push rod during maintenance or installation.

As shown in fig. 4 and 7, the reclosing device 2 includes a disconnection reclosing unit, a locking unit for controlling the falling of the falling piece, a monitoring control unit and a power supply unit. The power supply unit comprises a capacitor 23, one end of the capacitor 23 is electrically connected with the input end 3, and the other end of the capacitor 23 is grounded.

Get the electricity from the main line through the electric capacity, replaced traditional battery, and the one end and the power transmission line input of electric capacity are connected, even fall 7 and fall, do not influence the electric capacity and get the point yet, the reliability is high.

As shown in fig. 4 and 7, a fixing frame 24 is arranged on the insulating base 1, the reclosing device is installed on an iron tower of a power transmission line network through the fixing frame 24, a limiting pipe is further arranged at the lower end of the shell 9, a capacitor binding post 36 is sleeved in the limiting pipe, a spring 35 is further arranged between the capacitor binding post 36 and the limiting pipe, and after the reclosing device 2 is installed on the mounting frame 4, the capacitor binding post 36 is reliably electrically connected with the fixing frame 24 through the spring 35 so as to realize the grounding of the other end of the capacitor 23.

As shown in fig. 7, a spring is arranged between the capacitor binding post 36 and the limiting tube, so that even if the reclosing device is hung on the mounting rack 4 and then dislocated, the capacitor binding post 36 is not affected to be electrically connected with the fixing rack 24, and the reliability of capacitor power taking is improved.

As shown in fig. 7, a tapered boss 34 is provided at the end of the fixing frame 24, a tapered hole 33 corresponding to the tapered boss 34 is provided at the end of the limiting tube, and after the reclosure device 2 is hung on the mounting frame 4, the tapered hole 33 at the end of the limiting tube can be clamped on the tapered boss 34 of the fixing frame 24 for further limiting, thereby further improving the mounting reliability of the reclosure device 2.

The on-off reclosing unit of the reclosing device 2 comprises a first electromagnetic driver 19, a driving rod 20 and a vacuum circuit breaker 12, wherein a moving contact 15 of the vacuum circuit breaker 12 is fixedly connected with the driving rod 20. Moving contact 15 is connected with input 3 electricity, specifically is that moving contact 15 is connected with support 10 electricity through flexible cable, and support 10 is connected with mounting bracket 4 electricity, and mounting bracket 4 is connected with input 3 electricity.

The first electromagnetic driver 19 is a bistable structure, the two stable positions correspond to the contact closing position and the contact opening position of the movable contact 15 of the vacuum circuit breaker 12, the locking capability is provided, and sufficient driving force can be provided at the same time, magnetic force is generated after the first electromagnetic driver is electrified, the driving rod 20 is enabled to move leftwards and is attracted by the left-end permanent magnet after reaching the first stable position, so that the movable contact 15 is driven to move leftwards to reach the separation position and is separated from the fixed contact 13 of the vacuum circuit breaker 12, so that the power failure of the main circuit is realized, when the first electromagnetic driver 19 is electrified reversely, the driving rod 20 moves rightwards and is attracted by the right-end permanent magnet after reaching the second stable position, so that the movable contact 15 is driven to move rightwards to reach the closing position, the movable contact 15 is kept to be electrically connected with the fixed contact 13 under the action of the compression spring 21, and the main circuit is electrified.

As shown in fig. 4 and 6, the locking unit of the reclosure device 2 includes the second electromagnetic driver 27, the push rod 28, and the rotating member 40, the rotating member 40 is installed on the bottom of the housing 9, the left side of the rotating member 40 abuts against the push rod 28, the contact 8 is provided on the right side of the rotating member 40, one end of the drop piece 7 is detachably fitted to the contact 8, and the contact 8 is electrically connected to the stationary contact 13. The rotating member 40 is further provided with a torsion spring 26, one end of the torsion spring 26 is pressed on the rotating member 40, and the other end is pressed on the housing 9. The second electromagnetic drive 27 generates magnetic force after being electrified, the push rod 28 is pushed to move downwards, the rotating piece 40 is driven to rotate anticlockwise, the falling piece 7 loses the limit of the contact 8, the rotation falls, and the reclosing device realizes visual power failure. After the second electromagnetic driver 27 is powered off, the rotating piece 7 is reset under the action of the torsion spring 26, and the falling piece 7 can be manually pushed to be clamped with the contact 8 again.

The contact 8 is electrically connected with a fixed contact 13 through a flexible electric connector 11, and the flexible point connector 11 is an arc-shaped soft copper plate. The arc-shaped soft copper plate has certain elasticity, so that the torsion spring 26 can be assisted to further press the contact 8 and the falling piece 7.

The monitoring control unit is used for detecting the current of the main line, and judging whether the main line breaks down or not according to the detected current of the main line, so that the first electromagnetic driver 19 is driven to work, after the vacuum circuit breaker 12 is opened and closed for a plurality of times, the current of the main line is still abnormal, the monitoring control unit drives the second electromagnetic driver 27 to work again, the falling part 7 falls off, visual power failure is realized, and the maintenance personnel can conveniently maintain.

The shell 9 is provided with a state display screen 32 for displaying circuit fault information, wherein the circuit fault information comprises reclosing times, opening and closing current and time.

The embodiment of the utility model provides a reclosing device designs to handling the operating voltage who is up to or is higher than 35kV, and handles the fault current that is up to or even is greater than 12.5kA, consequently can choose suitable conducting material and insulating material for use for its structure.

The above description is only for the specific embodiments of the present invention, and it should be noted that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention, and the rest that are not described in detail are the prior art.

Claims

1. The utility model provides a reclosing device, sets up on the mounting bracket of reclosing device insulating base upper end, a serial communication port, reclosing device includes disconnection coincidence unit, locking unit, monitor control unit and electrical unit, still be provided with on the reclosing device with the guide structure that the limit structure of mounting bracket corresponds, reclosing device installs back on the mounting bracket, the guide structure card is in the limit structure of mounting bracket, prevent reclosing device is relative the mounting bracket transversely rocks.

2. The reclosing device of claim 1, wherein:

the guide structure is two pairs of positioning columns.

3. The reclosing device of claim 1, wherein:

the power supply unit comprises a capacitor, one end of the capacitor is electrically connected with the input end of the power transmission line, and the other end of the capacitor is grounded.

4. The reclosing device of claim 1, wherein:

the switching-off and switching-on unit comprises a first driver, a driving rod and a vacuum circuit breaker, wherein a moving contact of the vacuum circuit breaker is fixedly connected with the driving rod, and the moving contact is electrically connected with the input end of the power transmission line through a flexible cable.

5. The reclosing device of claim 1, wherein:

the locking unit includes second driver, push rod, rotation piece, it installs to rotate the piece on reclosing device's bottom, the one side of rotating the piece with the push rod butt, the opposite side of rotating the piece is provided with the contact, still be provided with the torsional spring on rotating the piece, the one end pressure of torsional spring is in rotate on the piece, the other end pressure is in on the reclosing device.

6. The reclosing device of claim 5, wherein:

the on-off coincidence unit comprises a vacuum circuit breaker, the contact is electrically connected with a fixed contact of the vacuum circuit breaker through a flexible electric connection piece, and the flexible electric connection piece is an arc-shaped soft copper plate.

7. The reclosing device of claim 1, wherein:

the bottom of reclosing device still is provided with spacing pipe, spacing intraductal cover is equipped with the electric capacity terminal, the electric capacity terminal with still be provided with the spring between the spacing pipe, reclosing device installs back on the mounting bracket, the electric capacity terminal pass through the spring with reclosing device insulator foot's mount compresses tightly.

8. The reclosing device of claim 7, wherein:

the tail end of the limiting pipe is provided with a tapered hole corresponding to the tapered boss, and after the reclosing device is hung on the mounting frame, the tapered hole at the tail end of the limiting pipe can be clamped on the tapered boss of the mounting frame.