CN211150413U

CN211150413U - Vacuum circuit breaker

Info

Publication number: CN211150413U
Application number: CN201922488025.1U
Authority: CN
Inventors: 魏岸若; 李宽宽
Original assignee: Chongqing Industry & Trade Polytechnic
Current assignee: Chongqing Industry & Trade Polytechnic
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-31
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to the technical field of power transmission line safety equipment, in particular to a vacuum circuit breaker, which comprises a vacuum arc extinguish chamber, an isolating switch and a mounting base, wherein the isolating switch comprises a post insulator, a pull rod insulator and an isolating mechanism, the post insulator is provided with a static contact, and the pull rod insulator is provided with a moving contact; the isolation mechanism comprises a connecting plate, the fixed contact and the moving contact both penetrate through the connecting plate to protrude outwards, a first limiting plate and a second limiting plate are arranged on the connecting plate, a conductive rod is arranged between the first limiting plate and the second limiting plate, a first conductive clip and a second conductive clip are mounted at the lower end of the conductive rod, a positioning rod is fixedly connected to the conductive rod, and the positioning rod is connected with a motor arranged on the mounting base. The utility model discloses a cooperate vacuum interrupter and isolator to set up simple structure, convenient operation's isolator mechanism on isolator, solved isolator on the current vacuum circuit breaker and installed and removed trouble and isolation performance not good technical problem.

Description

Vacuum circuit breaker

Technical Field

The utility model relates to a power transmission line safety equipment technical field, concretely relates to vacuum circuit breaker.

Background

The vacuum circuit breaker is a circuit breaker with contacts switching on and off in high-vacuum bubbles, is named because arc extinguishing media and insulating media in contact gaps after arc extinguishing are high vacuum, has the advantages of light weight, suitability for frequent operation and no need of maintenance for arc extinguishing, and is widely applied to power distribution networks. The existing vacuum circuit breaker is mostly connected with an isolating switch to ensure that a power failure accident occurs due to misoperation during line maintenance, but the existing isolating switch mostly adopts a traditional isolating switch which maintains the open and close states of a line in the modes of spring pressing, mechanical clamping and the like, and the isolating switch has many parts, is troublesome to assemble and disassemble, has frequent faults due to complex structure and is not suitable for wide application.

SUMMERY OF THE UTILITY MODEL

The utility model provides a vacuum circuit breaker, through with vacuum interrupter and isolator cooperation to set up simple structure, convenient operation's isolator mechanism on isolator, solved isolator on the current vacuum circuit breaker and installed and removed trouble and the not good technical problem of isolation performance.

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

a vacuum circuit breaker comprises a vacuum arc extinguish chamber, an isolating switch and a mounting base, wherein the vacuum arc extinguish chamber and the isolating switch are vertically arranged on the mounting base in parallel, the isolating switch comprises a post insulator and a pull rod insulator, the post insulator is connected with the vacuum arc extinguish chamber through a first conduit, a static contact is arranged on the post insulator, a moving contact is arranged on the pull rod insulator, and an isolating mechanism is arranged between the post insulator and the pull rod insulator;

the isolating mechanism comprises a connecting plate, the fixed contact and the moving contact both penetrate through the connecting plate to protrude outwards, a first limiting plate and a second limiting plate are arranged on the connecting plate, a conductive rod is arranged between the first limiting plate and the second limiting plate, a first conductive clip and a second conductive clip are fixedly mounted at the lower end of the conductive rod, the first conductive clip and the fixed contact are detachably clamped, the second conductive clip and the moving contact are detachably clamped, a positioning rod fixedly connected with the conductive rod is arranged between the first conductive clip and the second conductive clip, and the positioning rod penetrates through the connecting plate to be connected with a motor arranged on the mounting base.

Furthermore, the first limiting plate and the second limiting plate respectively comprise an upper side plate and a lower side plate which are arranged at intervals, and the upper side plate and the lower side plate are fixedly connected through a supporting plate; the lower side plate of the first limiting plate is fixedly sleeved on the static contact, and a first arc-shaped groove convenient for the first conductive clip to rotate is formed in the upper side plate of the first limiting plate; the movable contact is fixedly sleeved on the lower side plate of the second limiting plate, and a first arc-shaped groove convenient for the second conductive clip to rotate is formed in the upper side plate of the second limiting plate.

Further, install the protection casing between post insulator and the pull rod insulator, first limiting plate, second limiting plate, static contact, moving contact, conducting rod, first conductive checkpost and the conductive checkpost of second all locate in the protection casing.

Furthermore, the middle part of the vacuum arc extinguish chamber is connected with a current transformer, the current transformer and the vacuum arc extinguish chamber are distributed in a T shape, and the bottom of the vacuum arc extinguish chamber is connected with a switching-on and switching-off operating mechanism fixedly arranged in the mounting base.

Further, divide closing operation mechanism includes the casing, the casing passes through second conduit and vacuum interrupter fixed connection, be provided with annular quiet iron core in the casing, from last to having blocked closing coil, annular permanent magnet and separating brake coil down in proper order in the annular quiet iron core, just run through in the casing and be provided with the action bars, the position that the action bars is located the casing is fixed to be provided with and moves the iron core, move the iron core activity and locate closing coil, annular permanent magnet and separating brake coil in.

Compared with the prior art, the beneficial effects of the utility model are that: the isolating switch is provided with the isolating mechanism with simple structure and convenient operation, thereby avoiding the problems of troublesome assembly and disassembly and frequent failure of the traditional isolating switch mechanism, the concrete expression is that the motor drives the conductive rod to rotate, and drives the first conductive clip and the second conductive clip to rotate on the first limit plate and the second limit plate respectively, when the first conductive clip is clamped with the static contact, the second conductive clip is synchronously clamped with the moving contact, thereby realizing the circuit closing in the isolating switch and achieving the isolation of an external circuit, when the first conductive clip is separated from the fixed contact, the second conductive clip is also separated from the movable contact, the circuit in the isolating switch is disconnected, the external circuit is in a conducting state, the isolating speed of the isolating mechanism is high, and isolation faults are not easy to occur, and only the rotation angle of the motor needs to be correspondingly set, so that high performance is guaranteed, and possible casualty risks are reduced.

Drawings

Fig. 1 is a schematic view of an assembly structure of a vacuum circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic top view of the isolating switch according to the embodiment of the present invention;

fig. 3 is a schematic front view of a first limiting plate and a second limiting plate according to an embodiment of the present invention;

fig. 4 is the embodiment of the utility model provides an internal structure schematic diagram of divide-shut brake operating device.

Reference numerals: the vacuum arc extinguish chamber comprises a vacuum arc extinguish chamber 1, an isolating switch 2, a post insulator 201, a pull rod insulator 202, a mounting base 3, a first conduit 4, a static contact 5, a moving contact 6, an isolating mechanism 7, a connecting plate 701, a first limiting plate 702, a second limiting plate 703, a conducting rod 704, a first conducting clamp 705, a second conducting clamp 706, a locating rod 707, a motor 708, an upper side plate 8, a lower side plate 9, a supporting plate 10, a first arc-shaped groove 11, a second arc-shaped groove 12, a protective cover 13, a current transformer 14, a switching-on and switching-off operating mechanism 15, a shell 1501, an annular static iron core 1502, a switching-on coil 1503, an annular permanent magnet 1504, a switching-off coil 1505, an operating rod 1506, a movable iron core 1507.

Detailed Description

The present invention is further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the invention.

Referring to fig. 1 to 4, an embodiment of the present invention is a vacuum circuit breaker, including a vacuum interrupter 1, a disconnecting switch 2 and a mounting base 3, the vacuum interrupter 1 and the disconnecting switch 2 are vertically arranged on the mounting base 3 side by side, the vacuum interrupter 1 is connected to the disconnecting switch 2 through a first conduit 4, the middle of the vacuum interrupter 1 is connected to a current transformer 14, the current transformer 14 and the vacuum interrupter 1 form a "T" shaped structure, so as to facilitate the connection between the two, and the bottom of the vacuum interrupter 1 is connected to a switching-on/off operating mechanism 15, the switching-on/off operating mechanism 15 is fixedly arranged in the mounting base 3, so that the design can prevent external rainwater, dust and the like from affecting the normal operation of the switching-on/off operating mechanism 15, as shown in fig. 4, the switching-on/off operating mechanism 15 includes a housing 1501, the shell 1501 is fixedly connected with the vacuum arc-extinguishing chamber 1 through a second conduit 16, an annular static iron core 1502 is arranged in the shell 1501, the outer side of the annular static iron core 1502 is tightly attached to the inner wall of the shell 1501, a closing coil 1503, an annular permanent magnet 1504 and an opening coil 1505 are sequentially clamped on the inner side of the annular static iron core 1502 from top to bottom, the middle parts of the closing coil 1503, the annular permanent magnet 1504 and the opening coil 1505 are all of a hollow structure, furthermore, an operating rod 1506 penetrates through the shell 1501, enters the shell 1501 through the upper end of the shell 1501, sequentially penetrates through hollow areas in the middle parts of the closing coil 1503, the annular permanent magnet 1504 and the opening coil 1505 and then extends out from the lower end of the shell 1501, a movable iron core 1507 is fixedly connected to the position of the operating rod 1506, which is located in the hollow areas in the middle parts of the closing coil 1503, the annular permanent magnet 1504 and the opening coil 1505, and the movable iron, The hollow regions of the annular permanent magnet 1504 and the opening coil 1505 move up and down.

The switching operation mechanism 15 described above operates in a specific principle that when neither the opening coil 1505 nor the closing coil 1503 of the vacuum circuit breaker is energized, the movable iron core 1507 is in a balanced state under the magnetic force of the permanent magnet, and at this time, the movable iron core 1507 is positioned in the middle of the hollow regions of the closing coil 1503, the annular permanent magnet 1504 and the opening coil 1505, when the closing coil 1503 is energized, the closing coil 1503 generates magnetic potential with the increase of current, the magnetic force applied to the plunger 1507 is increased, and when the magnetic force is greater than the magnetic force applied to the plunger 1507 by the permanent magnet, the plunger 1507 moves together with the operating rod 1506 toward one end of the closing coil 1503, i.e., upward, to achieve the closing demand of the circuit breaker, and, similarly, when the opening coil 1505 is energized, as the current is gradually increased, the plunger 1507 moves downward together with the lever 1506, thereby realizing the opening requirement of the circuit breaker.

Through the divide-shut brake operating device 15 of design above-mentioned structure, adopt spring assembly or push-and-pull subassembly to realize the divide-shut brake for current vacuum circuit breaker, its speed of dividing the brake is faster, especially when having the safety risk, realizes the separating brake through electromagnetic action and can reduce the degree that the staff received the injury more effectively.

Further, on the basis, the isolating switch 2 includes a post insulator 201 and a pull rod insulator 202, the post insulator 201 is connected to the vacuum interrupter 1 through a first conduit 4, wherein a static contact 5 is disposed on the post insulator, a moving contact 6 is disposed on the pull rod insulator 202, and an isolating mechanism 7 is disposed between the post insulator 201 and the pull rod insulator 202, as shown in fig. 2, the isolating mechanism 7 includes a connecting plate 701, two through holes are disposed on the connecting plate 701, the static contact 5 and the moving contact 6 are respectively disposed in one through hole, and the upper ends of the static contact 5 and the moving contact 6 are both protruded to the upper surface of the connecting plate 701, a mounting hole is disposed at the middle position of the connecting line of the two through holes, a positioning rod 707 is rotatably connected in the mounting hole, a motor 708 is connected to the lower end of the positioning rod 707, and the motor 708 is fixedly connected to the mounting, a first limit plate 702 is fixedly arranged at one end of the connecting plate 701 through screw threads, a second limit plate 703 is fixedly arranged at the other end of the connecting plate 701 through screw threads, the first limit plate 702 and the second limit plate 703 are in central symmetry with the central axis of the locating plate and the intersection point of the horizontal central connecting line of the first limit plate 702 and the second limit plate 703, in order to connect the static contact 5 with the movable contact 6, a conductive rod 704 is arranged between the first limit plate 702 and the second limit plate 703, a first arc-shaped groove 11 is arranged on the first limit plate 702, a second arc-shaped groove 12 is arranged on the second limit plate 703, a first conductive clip 705 is arranged at the position of the conductive rod 704 corresponding to the static contact 5, a second conductive clip 706 is arranged at the position of the conductive rod 704 corresponding to the movable contact 6, the first conductive clip is movably arranged in the first arc-shaped groove 11, the second conductive clip 706 is movably arranged in the second arc-, the first conductive clip 705 and the second conductive clip 706 are vertically provided with a clip with a U-shaped notch.

The working principle of the isolating mechanism 7 is that when the motor 708 drives the positioning rod 707 to rotate, the positioning rod 707 drives the conductive rod 704 to rotate, so as to drive the first conductive clip 705 to slide in the first arc-shaped groove 11, the second conductive clip 706 to slide in the second arc-shaped groove 12, when the conductive rod 704 is completely arranged on the connecting rod, the first conductive clip 705 is clamped with the static contact 5, and meanwhile, the second conductive clip 706 is also clamped with the movable contact 6 correspondingly, at this time, the motor 708 stops rotating, the circuit in the isolating switch 2 is closed, the isolating switch 2 realizes the isolating effect, when re-isolation is not needed, the motor 708 continues to rotate, so as to ensure that the first conductive clip 705 is separated from the static contact 5, when the second conductive clip 706 is separated from the movable contact 6, the circuit in the isolating switch 2 is disconnected, and the isolating switch 2 does not perform isolation any.

Above-mentioned isolating mechanism 7's simple structure only needs the rotation angle of adjustment motor 708 can realize isolator 2's closure and disconnection, compares in current isolator 2 and adopts spring mechanism or mechanical structure to realize opening and closing, and the spare part of its application is still less, and the probability of breaking down is littleer, and is more convenient when installation and dismantlement.

In order to stabilize the structure of the isolation mechanism 7 and avoid the influence of wind force on the engagement between the first conductive clip 705 and the static contact 5, and the engagement between the second conductive clip 706 and the movable contact 6, as shown in fig. 3, the first limiting plate 702 and the second limiting plate 703 are both configured as a transversely disposed "J" structure composed of an upper side plate 8, a lower side plate 9 and a supporting plate 10, specifically, the upper side plate 8 is disposed above the lower side plate 9, the supporting plate 10 is disposed between the upper side plate 8 and the lower side plate 9, and two ends of the supporting plate 10 are respectively fixedly connected with the upper side plate 8 and the lower side plate 9, further, the length of the upper side plate 8 is greater than that of the lower side plate 9, wherein the lower side plate 9 of the first limiting plate 702 is sleeved on the static contact 5, the first arc-shaped groove 11 is disposed in the upper side plate 8 of the first limiting plate 702, the lower side plate 9 of the second limiting plate 703 is sleeved on the, the second arc-shaped groove 12 is formed in the upper side plate 8 of the second limiting plate 703, and the first conductive clip 705 and the fixed contact 5, and the second conductive clip 706 and the movable contact 6 can be accurately clamped by accurately aligning the first arc-shaped groove 11 and the fixed contact 5, and accurately aligning the second arc-shaped groove 12 and the movable contact 6. In order to reduce the influence of the external environment on the disconnecting switch 2 to the maximum, such as rain wetting, dust deposition, or strong wind damage, the protective covers 13 are fixedly installed at the upper ends of the post insulator 201 and the pull rod insulator 202, and the first limiting plate 702, the second limiting plate 703, the static contact 5, the movable contact 6, the conductive rod 704, the first conductive clip 705, and the second conductive clip 706 are effectively covered by the protective covers 13. In the explanation of the present invention, it should be noted that the term "orientation" is only used for convenience of description and understanding, and is not only limited to the installation position of specific technical features, but also does not exclude other installation manners that can be realized.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a vacuum circuit breaker, includes vacuum interrupter (1), isolator (2) and mounting base (3), its characterized in that: the vacuum arc-extinguishing chamber (1) and the isolating switch (2) are vertically arranged on the mounting base (3) in parallel, the isolating switch (2) comprises a post insulator (201) and a pull rod insulator (202), the post insulator (201) is connected with the vacuum arc-extinguishing chamber (1) through a first conduit (4), a static contact (5) is arranged on the post insulator, a moving contact (6) is arranged on the pull rod insulator (202), and an isolating mechanism (7) is arranged between the post insulator (201) and the pull rod insulator (202);

the isolating mechanism (7) comprises a connecting plate (701), the static contact (5) and the moving contact (6) both penetrate through the connecting plate (701) and protrude outwards, a first limit plate (702) and a second limit plate (703) are arranged on the connecting plate (701), a conductive rod (704) is arranged between the first limit plate (702) and the second limit plate (703), a first conductive clip (705) and a second conductive clip (706) are fixedly arranged at the lower end of the conductive rod (704), the first conductive clip (705) is detachably clamped with the fixed contact (5), the second conductive clip (706) is detachably clamped with the movable contact (6), a positioning rod (707) fixedly connected with the conductive rod (704) is arranged between the first conductive clip (705) and the second conductive clip (706), the positioning rod (707) penetrates through the connecting plate (701) and is connected with a motor (708) arranged on the mounting base (3).

2. A vacuum interrupter as claimed in claim 1, characterized in that: the first limiting plate (702) and the second limiting plate (703) respectively comprise an upper side plate (8) and a lower side plate (9) which are arranged at intervals, and the upper side plate (8) and the lower side plate (9) are fixedly connected through a supporting plate (10); a lower side plate (9) of the first limiting plate (702) is fixedly sleeved on the static contact (5), and a first arc-shaped groove (11) convenient for the first conductive clip (705) to rotate is formed in an upper side plate (8) of the first limiting plate (702); the lower side plate (9) of the second limiting plate (703) is fixedly sleeved on the moving contact (6), and a second arc-shaped groove (12) convenient for the second conductive clip (706) to rotate is formed in the upper side plate (8) of the second limiting plate (703).

3. A vacuum interrupter as claimed in claim 2, characterized in that: a protective cover (13) is arranged between the post insulator (201) and the pull rod insulator (202), and the first limiting plate (702), the second limiting plate (703), the static contact (5), the movable contact (6), the conductive rod (704), the first conductive clip (705) and the second conductive clip (706) are all arranged in the protective cover (13).

4. A vacuum interrupter as claimed in claim 1, characterized in that: the middle part of vacuum interrupter (1) is connected with current transformer (14), current transformer (14) are "T" font with vacuum interrupter (1) and distribute, and the bottom of vacuum interrupter (1) is connected with fixed divide-shut brake operating device (15) of locating in mounting base (3).

5. A vacuum interrupter as claimed in claim 4, wherein: divide closing operation mechanism (15) includes casing (1501), casing (1501) are through second conduit (16) and vacuum interrupter (1) fixed connection, be provided with annular quiet iron core (1502) in casing (1501), from last to having blocked in proper order closing coil (1503), annular permanent magnet (1504) and separating brake coil (1505) down in annular quiet iron core (1502), just run through in casing (1501) and be provided with action bars (1506), the fixed movable iron core (1507) that is provided with in position that action bars (1506) are located casing (1501), move in iron core (1507) activity is located closing coil (1503), annular permanent magnet (1504) and separating brake coil (1505).