CN218996590U

CN218996590U - Totally enclosed type column isolating switch

Info

Publication number: CN218996590U
Application number: CN202223199420.6U
Authority: CN
Inventors: 兰剑; 王承玉; 冯英
Original assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI
Current assignee: State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-05-09
Anticipated expiration: 2032-11-30

Abstract

The application discloses totally enclosed post isolator includes insulating box and insulating apron. The insulation box is of a box body structure with an opening, and a fixed contact and a connecting contact which are both used for connecting a distribution overhead line are arranged in the insulation box, and the connecting contact and the fixed contact are separated by a preset distance. The insulating cover plate is provided with a moving contact conducting plate, the insulating cover plate is used for being buckled at the opening of the insulating box to form a closed insulating cavity, the moving contact conducting plate, the fixed contact and the connecting contact are sealed in the closed insulating cavity, and the moving contact conducting plate is electrically connected with the fixed contact and the connecting contact. The totally enclosed on-column isolating switch of the application avoids a series of problems caused by the exposure of high-voltage electrified metal parts by providing the enclosed insulating cavity.

Description

Totally enclosed type column isolating switch

Technical Field

The application relates to the field of electrical switches, in particular to a totally-enclosed pole-mounted isolating switch.

Background

The pole-mounted isolating switch is capable of bearing current under normal loop conditions and current under abnormal conditions (such as short circuit) within a specified time when in a closing position; in the switching-off position, there is a switching device with insulation distance and obvious off mark meeting the specified requirement between contacts. Therefore, as an indispensable power device in a power grid system, it is widely used in distribution overhead lines.

In the existing pole-mounted isolating switch product technology, high-voltage electrified metal parts are exposed in the air, so that rain and snow, ice layers, sand dust, air floaters, branches and the like are easily attached to the high-voltage electrified metal parts, metal parts and conductive contact area ash, scale, rust or conductive channels are formed, and then the faults of difficult switching-on and switching-off operation or incomplete switching-on and switching-off, heating and burning of a conductive loop, interphase or ground short circuit and the like are caused, so that the safe and reliable operation of a power grid is seriously influenced.

Disclosure of Invention

The application provides a totally enclosed type on-column disconnecting switch, which can solve a series of problems caused by exposure of high-voltage electrified metal parts of the existing on-column disconnecting switch.

The embodiment of the application provides a totally enclosed type pole-mounted isolating switch, which comprises an insulating box and an insulating cover plate. The insulation box is of a box body structure with an opening, and a fixed contact and a connecting contact which are both used for connecting a distribution overhead line are arranged in the insulation box, and the connecting contact and the fixed contact are separated by a preset distance. The insulating cover plate is provided with a moving contact conducting plate, the insulating cover plate is used for being buckled at the opening of the insulating box to form a closed insulating cavity, the moving contact conducting plate, the fixed contact and the connecting contact are sealed in the closed insulating cavity, and the moving contact conducting plate is electrically connected with the fixed contact and the connecting contact.

In some embodiments, the insulating box is in a strip structure, and the fixed contact and the connecting contact are respectively arranged at two ends of the insulating box.

In some embodiments, a first insulating connecting terminal is arranged on the outer wall of one end, close to the fixed contact, of the insulating box, the first insulating connecting terminal is electrically connected with the fixed contact, a second insulating connecting terminal is arranged on the outer wall of one end, close to the connecting contact, of the insulating box, the second insulating connecting terminal is electrically connected with the connecting contact, so that the fixed contact is connected with the distribution overhead line through the first insulating connecting terminal, and the connecting contact is connected with the distribution overhead line through the second insulating connecting terminal.

In some of these embodiments, the insulation box gradually slopes toward the inside of the insulation box from top to bottom on both sides in the length direction thereof.

In some embodiments, the insulating cover plate is a strip-shaped structure extending along the length direction of the insulating box, the moving contact conductive plate is arranged on one side of the insulating cover plate in the thickness direction of the moving contact conductive plate, and the moving contact conductive plate is a strip-shaped structure extending along the length direction of the insulating cover plate.

In some embodiments, one end of the movable contact conductive plate is rotatably connected with the connecting contact, and the other end of the movable contact conductive plate is freely arranged, so that the insulating cover plate can be turned over to be opened and closed, and the movable contact conductive plate is driven to rotate so as to be contacted with or separated from the fixed contact, and the closing or opening of the totally-enclosed column isolating switch is realized.

In some embodiments, the moving contact conductive plate includes two conductive sheets, the two conductive sheets are arranged at a preset distance along a width direction of the moving contact conductive plate, and the two conductive sheets are respectively arranged at two sides of the connecting contact and the fixed contact.

In some embodiments, an operating shackle is arranged on one side of the insulating cover plate, which faces away from the movable contact conductive plate, and the operating shackle is used for controlling the turnover opening and closing of the insulating cover plate so as to control the rotation of the movable contact conductive plate.

In some of these embodiments, an operating shackle is rotatably connected to the insulating cover plate, the operating shackle being provided with a catch. The outer wall of one end of the insulating box, which is close to the fixed contact, is provided with a lock hook which is used for locking a lock catch. The operation shackle, the lock catch and the lock hook are arranged outside the sealed insulating cavity and are isolated from the static contact, the connecting contact and the moving contact conducting plate in the sealed insulating cavity so as to avoid electric contact.

In some embodiments, the outer sides of the operating shackle and the latch are covered by an insulating layer.

In some of these embodiments, the bottom of the insulating box is provided with a post insulator, and the post insulator is disposed between the first and second insulating terminals. The bottom of pillar insulator is provided with the base.

According to the embodiment of the application, the totally-enclosed pole-mounted isolating switch comprises an insulating box and an insulating cover plate. The insulation box is of a box body structure with an opening, and a fixed contact and a connecting contact which are both used for connecting a distribution overhead line are arranged in the insulation box, and the connecting contact and the fixed contact are separated by a preset distance. The insulating cover plate is provided with a moving contact conducting plate, the insulating cover plate is used for being buckled at the opening of the insulating box to form a closed insulating cavity, the moving contact conducting plate, the fixed contact and the connecting contact are sealed in the closed insulating cavity, and the moving contact conducting plate is electrically connected with the fixed contact and the connecting contact. The totally enclosed on-column disconnecting switch of the application avoids exposing high-voltage electrified metal parts by providing the enclosed insulating cavity, thereby avoiding attaching outdoor rain and snow, ice layers, sand dust, air floaters, branches and the like to the high-voltage electrified metal parts, leading to the problems that the high-voltage electrified metal parts and conductive contact area are grey, scale, rust or conductive channels are formed, the switching-on and switching-off operation is difficult or the switching-on and switching-off is not in place, the conductive loop is heated and burnt, interphase or short circuit to the ground and the like seriously influence the safe and reliable operation of a power grid, and meanwhile, no exposed electrified body exists, so that operation and maintenance personnel can operate without power failure.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a fully-enclosed pole-mounted isolating switch in a closed state in an embodiment of the present application;

fig. 2 is a schematic structural diagram of the totally enclosed column isolation switch in the embodiment of the present application in the open state.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Referring to fig. 1-2, embodiments of the present application provide a fully enclosed pole-mounted disconnector 1 that may include an insulating housing 10 and an insulating cover plate 11.

The insulating cartridge 10 may be an open-topped cartridge body. Further, the insulating case 10 may have a bar-like structure extending in the left-right direction. Still further, the insulating case 10 may be boat-shaped, at this time, the insulating case 10 may include an insulating support plate 100 and insulating side plates 101, the insulating side plates 101 may include four insulating side plates 101, namely, front, rear, left and right insulating side plates 101, the left and right insulating side plates 101 gradually incline toward the inner shrinkage of the insulating case 10 from top to bottom, may be arc-shaped, and the insulating side plates 101 and the insulating support plate 100 may be of an integral structure.

A stationary contact 12 and a connection contact 13 may be provided in the insulation box 10, the stationary contact 12 and the connection contact 13 being used for connecting the distribution overhead line 2. The fixed contact 12 may be fixedly connected at the left end of the insulation box 10, and the connection contact 13 may be fixedly connected at the right end of the insulation box 10, at which time the connection contact 13 is spaced a preset distance from the fixed contact 12.

A first insulated terminal 14 may be provided on the outer wall of the left end of the insulation box 10 for connecting the distribution overhead line 2. The first insulating terminal 14 may be an all-insulating body, and may be adhered to the outer wall of the insulating box 10 by an adhesive, or may be fixed by other manners, which is not limited in the embodiments of the present application. The first insulating terminal 14 may be disposed obliquely downward. The first insulating connecting terminal 14 may be electrically connected to the fixed contact 12, so as to achieve connection between the fixed contact 12 and the distribution overhead line 2.

A second insulated terminal 15 may be provided on the outer wall of the right end of the insulation box 10 for connecting the distribution overhead line 2. The second insulating terminal 15 may be an all-insulating body, and may be adhered to the outer wall of the insulating box 10 by an adhesive, or may be fixed by other means, which is not limited in any way in the embodiments of the present application. The second insulated wire connection terminal 15 may be disposed to be inclined downward. The second insulated terminal 15 may be electrically connected to the connection contact 13 to achieve a connection between the connection contact 13 and the distribution overhead line 2.

The bottom of the insulation box 10 may be provided with vertical post insulators 16 for increasing the insulation of the insulation box 10. The post insulator 16 may be a full insulator. The post insulator 16 may be disposed between the first and second

insulated terminals

14 and 15. The post insulator 16 may be adhesively secured to the bottom of the insulating case 10 by means of adhesive glue or the like.

The bottom of the post insulator 16 may be provided with a horizontal base 17 for mounting on the pole. The post insulator 16 and the base 17 may be fixedly connected by means of fasteners or the like.

The insulating cover 11 may be a strip structure extending in the left-right direction, and is used for being buckled at the opening of the insulating box 10 to form a closed insulating cavity.

A movable contact conductive plate 18 for electrically connecting the fixed contact 12 and the connection contact 13 when forming the closed insulating cavity may be provided on the lower side of the insulating cover plate 11, and the movable contact conductive plate 18, the fixed contact 12 and the connection contact 13 are all sealed in the closed insulating cavity.

The moving contact conductive plate 18 may include two conductive plates (not shown in the drawing), which are each in a strip-like structure extending in the left-right direction, are each disposed vertically, and are juxtaposed in the front-rear direction at a predetermined distance, and at this time, are disposed on the front and rear sides of the connection contact 13 and the stationary contact 12, respectively.

The right ends of the two conductive plates can be respectively provided with a first rotating shaft 130 on the connecting contact 13 in a penetrating way, so that the whole right end of the moving contact conductive plate 18 is rotatably connected with the connecting contact 13, and the left ends of the two conductive plates can be respectively and freely arranged. The above arrangement makes the insulating cover plate 11 be installed on the insulating box 10 in a reversible opening and closing manner, at this time, the insulating cover plate 11 can rotate relative to the insulating box 10 to realize opening and closing of the closed insulating cavity, and meanwhile, the moving contact conducting plate 18 is driven to integrally rotate so as to contact with or separate from the fixed contact 12, so that closing or opening of the totally-enclosed column isolating switch 1 is realized.

Through the arrangement, in the closing state, as shown in fig. 1, the movable contact conducting plate 18 is connected with the fixed contact 12 in a matched manner, and the insulating cover plate 11 is buckled at the opening of the insulating box 10 to form a closed insulating cavity, so that the fixed contact 12, the connecting contact 13 and the movable contact conducting plate 18 are closed in the closed insulating cavity, a circuit is closed, communication between the power supply side and the load side of the power distribution overhead line 2 is realized, and a complete conducting circuit is formed for supplying power. In the opening state, as shown in fig. 2, the insulating cover plate 11 rotates clockwise to an open state, and the moving contact conducting plate 18 and the fixed contact 12 are separated from contact to form an isolation fracture, so that a circuit is disconnected, and a significant disconnection point is formed between the power supply side and the load side of the distribution overhead line 2.

An operating shackle 19 may be provided on the upper side of the insulating cover 11 at a position to the left, at which time the operating shackle 19 is provided outside the closed insulating cavity for controlling the turning-over opening and closing of the insulating cover 11 to control the rotation of the moving contact conductive plate 18 so as to perform switching between the closing state and the opening state.

The operating shackle 19 may be provided with a second rotation shaft 110 on the insulating cover 11 in such a way that the operating shackle 19 is rotatably connected to the insulating cover 11, and at the same time the operating shackle 19 may be provided with a catch 190, i.e. the catch 190 is also arranged outside the closed insulating cavity. At this time, the outer wall of the insulating box 10 near one end of the fixed contact 12 is provided with a latch hook 20, that is, the latch hook 20 is also disposed outside the closed insulating cavity, and the latch hook 20 is used for locking the latch 190. The arrangement ensures that the operating hook ring 19 and the lock catch 190 form a linkage device, so that the lock catch 190 and the lock hook 20 are locked in the closing position, the operating hook ring 19 is pulled when the closing position is opened, the operating hook ring 19 rotates, and the lock catch 190 and the lock hook 20 are automatically unlocked. The operating shackle 19, the lock catch 190, and the lock hook 20 are isolated from the live parts such as the fixed contact 12, the connecting contact 13, and the moving contact conductive plate 18 in the closed insulation cavity, and no electrical contact exists, that is, the operating shackle 19, the lock catch 190, and the lock hook 20 are not live. In addition, the outer sides of the operating shackle 19 and the catch 190 may be provided with an insulating coating for corrosion protection.

In summary, the totally enclosed column isolating switch 1 of the present application, rotatable connection between the moving contact conductive plate 18 and the connecting contact 13, not only can make the separation between the fixed contact 12 and the moving contact conductive plate 18 to form an isolation fracture, but also can realize the conversion between the opening and closing states of the insulating cover plate 11, so that the insulating cover plate 11 is buckled on the insulating box 10 when in the closing state, so that a closed insulating cavity is formed between the insulating cover plate 11 and the insulating box 10, and further the fixed contact 12, the connecting contact 13 and the moving contact conductive plate 18 are sealed in the closed insulating cavity, thereby avoiding the attachment of outdoor rain and snow, ice layers, dust, air floaters, branches and the like on the charged components such as the fixed contact 12, the connecting contact 13 and the moving contact conductive plate 18, and further avoiding the dust, scale, rust or forming a conductive channel of the charged components, thereby avoiding the difficult operation of the closing and opening brake or the non-reaching of the position, the conductive circuit heating, the inter-phase or ground short circuit and other influences on the safe and reliable operation of the power grid, that is ensured, and meanwhile, the exposed maintenance personnel do not have no power failure.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, this is for convenience of description and simplification of the description, but does not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely used for illustration and are not to be construed as limitations of the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to the specific circumstances.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

Claims

1. A totally enclosed pole-mounted disconnector, comprising:

the insulation box is of a box body structure with an opening, a fixed contact and a connecting contact which are both used for connecting a distribution overhead line are arranged in the insulation box, and the connecting contact and the fixed contact are separated by a preset distance;

the insulating cover plate is used for being buckled at an opening of the insulating box to form a closed insulating cavity, the moving contact conducting plate, the fixed contact and the connecting contact are sealed in the closed insulating cavity, and the moving contact conducting plate is electrically connected with the fixed contact and the connecting contact;

the movable contact conductive plate comprises two conductive sheets, the two conductive sheets are arranged at preset distances along the width direction of the movable contact conductive plate, and the two conductive sheets are respectively arranged on two sides of the connecting contact and the fixed contact.

2. A totally enclosed column disconnector as claimed in claim 1,

the insulation box is of a strip-shaped structure, and the fixed contact and the connecting contact are respectively arranged at two ends of the insulation box.

3. A totally enclosed column disconnector as claimed in claim 2,

the outer wall of the insulating box, which is close to one end of the fixed contact, is provided with a first insulating wiring terminal, the first insulating wiring terminal is electrically connected with the fixed contact, the outer wall of the insulating box, which is close to one end of the connecting contact, is provided with a second insulating wiring terminal, the second insulating wiring terminal is electrically connected with the connecting contact, so that the fixed contact is connected with the distribution overhead line through the first insulating wiring terminal, and the connecting contact is connected with the distribution overhead line through the second insulating wiring terminal.

4. A totally enclosed column disconnector as claimed in claim 2,

the two sides of the insulation box in the length direction of the insulation box gradually incline towards the inner shrinkage of the insulation box from top to bottom.

5. A totally enclosed column disconnector as claimed in claim 2,

the insulating cover plate is of a strip-shaped structure extending along the length direction of the insulating box, the moving contact conducting plate is arranged on one side of the insulating cover plate in the thickness direction of the moving contact conducting plate, and the moving contact conducting plate is of a strip-shaped structure extending along the length direction of the insulating cover plate.

6. The totally enclosed pole-mounted isolator as claimed in claim 5, wherein,

one end of the movable contact conducting plate is rotatably connected with the connecting contact, and the other end of the movable contact conducting plate is freely arranged, so that the insulating cover plate can be turned over to be opened and closed, and the movable contact conducting plate is driven to rotate so as to be contacted with or separated from the fixed contact, and the closing or opening of the totally-enclosed column isolating switch is realized.

7. The totally enclosed pole-mounted isolator as claimed in claim 6, wherein,

an operation shackle is arranged on one side, away from the movable contact conducting plate, of the insulating cover plate, and the operation shackle is used for controlling overturning opening and closing of the insulating cover plate so as to control rotation of the movable contact conducting plate.

8. The totally enclosed pole-mounted isolator as claimed in claim 7, wherein,

the operating shackle is rotatably connected to the insulating cover plate, and the operating shackle is provided with a lock catch;

the outer wall of the insulating box, which is close to one end of the fixed contact, is provided with a lock hook, and the lock hook is used for locking the lock catch;

the operation shackle, the lock catch and the lock hook are all arranged outside the closed insulation cavity and are isolated from the static contact, the connection contact and the moving contact conducting plate in the closed insulation cavity so as to avoid electric contact.

9. The totally enclosed pole-mounted isolator as claimed in claim 8, wherein,

and the outer sides of the operating shackle and the lock catch are respectively provided with an insulating layer for coating.

10. A totally enclosed column disconnector as claimed in claim 3,

a post insulator is arranged at the bottom of the insulation box, and the post insulator is arranged between the first insulation wiring terminal and the second insulation wiring terminal; the bottom of the pillar insulator is provided with a base.