阅读说明：本技术 一种快速单相旁路真空接触器 (Quick single-phase bypass vacuum contactor ) 是由 陈斌 张卫东 于 2021-11-01 设计创作，主要内容包括：本发明公开了一种快速单相旁路真空接触器,包括永磁驱动机构、4条绝缘支撑柱、固定板、真空灭弧室、绝缘子、绝缘拉杆、第一力矩转换拐臂、第二力矩转换拐臂以及手分拐臂,4条所述绝缘支撑柱与固定板和磁缸上盖组成了一个固定式框架,具体涉及真空接触器技术领域,通过电磁、永磁或机械等为保持的设计思路和方法。本发明是在分闸时采用保持原理通过永磁保持的设计思路和方法。合闸时通过真空灭弧室自闭力与合闸弹簧及辅助弹簧力进行保持。本发明通过采用手动方式分闸,分闸时,通过手动将手分机构向分闸指示方向推动。(The invention discloses a rapid single-phase bypass vacuum contactor which comprises a permanent magnet driving mechanism, 4 insulating support columns, a fixing plate, a vacuum arc extinguish chamber, an insulator, an insulating pull rod, a first torque conversion connecting lever, a second torque conversion connecting lever and a hand-separating connecting lever, wherein the 4 insulating support columns, the fixing plate and an upper cover of a magnetic cylinder form a fixed frame, and particularly relates to the technical field of vacuum contactors. The invention relates to a design idea and a method for keeping through permanent magnetism by adopting a keeping principle during opening. And the self-closing force of the vacuum arc extinguish chamber, the closing spring and the auxiliary spring force are kept during closing. According to the invention, the brake is opened manually, and during brake opening, the manual opening mechanism is pushed to the brake opening indication direction manually.)

1. The utility model provides a quick single-phase bypass vacuum contactor, includes permanent magnetism actuating mechanism, insulating support column (3), fixed plate (1), vacuum interrupter (4), insulator (10), insulating pull rod (12), first moment conversion connecting lever (7), second moment conversion connecting lever (9) and hand branch connecting lever (16), its characterized in that: insulating support post (3) are provided with 4, 4 a fixed frame has been constituteed with fixed plate (1) and magnetic cylinder upper cover (17) in insulating support post (3), and fixed plate (1) of frame top is provided with quiet end conductive copper bar (2) and vacuum interrupter (4), quiet end conductive copper bar (2) and vacuum interrupter (4) are fixed through screw and fixed plate (1) and are formed the power inlet wire end together.

2. A fast single-phase bypass vacuum contactor according to claim 1, characterized in that the lower end of said vacuum interrupter (4) is provided with a first conductive soft row (5) and a second conductive soft row (8), respectively, said first conductive soft row (5) and said second conductive soft row (8) forming the power input and output terminals.

3. A rapid single-phase bypass vacuum contactor according to claim 1, characterized in that said permanent magnet driving mechanism is a double coil driving and two sets of coils are redundant to each other, the double coil comprising a first coil (20) and a second coil (21).

4. The rapid single-phase bypass vacuum contactor as claimed in claim 1, wherein the permanent magnet driving mechanism comprises a magnetic cylinder, an upper end cover (17), a lower end cover (22), a permanent magnet (18), a first coil (20), a second coil (21), a magnetic ring (15), a closing spring (14), a spring fixing seat (13), a spring torque adjusting nut (25), a first torque conversion crank arm (7), a second torque conversion crank arm (9), a hand-separating crank arm (16), a torque conversion crank arm mounting bracket (11), a movable iron core (23) and an insulating pull rod (12).

5. A fast single-phase bypass vacuum contactor according to claim 1, further comprising a method of operation, characterized by the steps of:

a, the self-closing force of a vacuum arc-extinguishing chamber (4) and a closing spring and an auxiliary spring (24) are used for storing energy during manual brake opening,

b, switching on the power supply, switching on the switch-on coil in the magnetic cylinder after excitation, generating a reverse magnetic circuit by adopting the reverse electrification of the switch-on coil, overcoming the retention force of the permanent magnet, passing through the self-closing force of the vacuum arc-extinguishing chamber, a switch-on spring and an auxiliary spring (24),

and C, simultaneously releasing instantly to push the moving contact of the vacuum arc extinguish chamber to a closed position of the static contact to complete switching on, and then switching on the coil to cut off the power supply through the auxiliary contact to complete a switching on task.

Technical Field

The invention relates to the technical field of vacuum contactors, in particular to a quick single-phase bypass vacuum contactor.

Background

In the existing electric power system, high, medium and low voltage contactors and circuit breakers are all electromagnetic opening and closing switches, the speed of the electromagnetic opening and closing switches is mainly realized by the volume of a coil and a magnet, vacuum contact is realized by arc extinction through a vacuum tube, the vacuum tube consists of self-closing force and a contact pressure spring, and the vacuum contactors used by conventional electric power have the design idea of a contact pressure spring and an opening counter-force spring, so that the designed coil and magnet have larger volumes, the vacuum tube can be pushed to the closing position, and the pushing force is larger than the sum of the self-closing force, the over-stroke spring force and the counter-force spring force of the vacuum tube. The larger the coil is, the longer the closing time is, and the size of the inductor is related to the contact closing time due to the existence of the inductor in the electromagnet coil.

The conventional contactor in the domestic market at present cannot meet the requirements of the existing novel industries such as photovoltaic solar energy, wind power generation, flexible direct current and frequency conversion. Because these new types of power generation are carried out without interruption when incorporated into the grid. Or as a bypass switch contactor, the bypass switch contactor is a key element for grid connection, so that the requirements on the closing time and reliability of the contactor are extremely high, and the requirements on the product volume are also strict due to the reasons of floor area, cost control and the like, so that the conventional contactor cannot be realized.

Disclosure of Invention

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a quick single-phase bypass vacuum contactor, includes permanent magnetism actuating mechanism, 4 insulating support columns, fixed plate, vacuum interrupter, insulator, insulating pull rod, first moment conversion connecting lever, second moment conversion connecting lever and hand branch connecting lever, 4 a fixed frame has been constituteed with fixed plate and magnetic cylinder upper cover to insulating support column, and the fixed plate of frame top is provided with quiet end conductive copper bar and vacuum interrupter, quiet end conductive copper bar and vacuum interrupter pass through the screw and fix together with the fixed plate and form the power inlet wire end.

As a further scheme of the invention: the lower extreme of vacuum interrupter is provided with first electrically conductive soft row and the electrically conductive soft row of second respectively, first electrically conductive soft row and the electrically conductive soft row of second form power input and output.

As a further scheme of the invention: the permanent magnet driving mechanism is driven by double coils, the two groups of coils are mutually redundant, and the double coils comprise a first closing coil and a second closing coil.

As a further scheme of the invention: the permanent magnet driving mechanism consists of a magnetic cylinder, an upper end cover, a lower end cover, a permanent magnet, a first coil, a second coil, a magnetic ring, a closing spring, a spring fixing seat, a spring torque adjusting nut, a first torque conversion connecting lever, a second torque conversion connecting lever, a hand-separating connecting lever, a torque conversion connecting lever mounting bracket, a movable iron core and an insulating pull rod.

As a further scheme of the invention: the method is characterized by comprising the following steps:

a, storing energy by using the self-closing force of a vacuum arc-extinguishing chamber, a closing spring and an auxiliary spring during manual opening.

And B, switching on the power supply, exciting a switching-on coil in the magnetic cylinder, switching on the magnetic cylinder, and generating a reverse magnetic circuit by reversely electrifying the switching-on coil to overcome the retention force of the permanent magnet through the self-closing force of the vacuum arc-extinguishing chamber, the switching-on spring and the auxiliary spring.

And C, simultaneously releasing instantly to push the moving contact of the vacuum arc extinguish chamber to a closed position of the static contact to complete switching on, and then switching on the coil to cut off the power supply through the auxiliary contact to complete a switching on task.

Compared with the prior art, the invention has the following beneficial effects:

(1) through the multiple groups of torque conversion crank arms, under the state of the same volume, the effective holding force of the magnetic cylinder is amplified through a mechanism lever ratio, the weight of a movable part is reduced, and the closing speed is accelerated.

(2) The closing time can be adjusted by adjusting a spring moment adjusting nut according to the closing spring force.

(3) The reliability of the bypass switch is improved by the driving mechanism mode of the single magnetic cylinder and the double coils.

(4) The moment conversion connecting lever multiplies the contact pressure after switching on, and the bounce generated by rapid switching on impact and vibration is effectively inhibited.

(5) Through applying reverse design thinking, adopt the dislocation formula to be connected between magnetic cylinder and the vacuum interrupter, mutually independent universal joint mounting means has avoided horizontal torsion and coefficient of friction that the accessory tolerance leads to, has reduced the produced spring problem of vacuum interrupter contact slope because of the axiality deviation leads to.

The conventional existing vacuum contactor adopts a holding principle during closing and adopts a design idea and a method for holding through electromagnetism, permanent magnetism or machinery and the like. The invention relates to a design idea and a method for keeping through permanent magnetism by adopting a keeping principle during opening. And the self-closing force of the vacuum arc extinguish chamber, the closing spring and the auxiliary spring force are kept during closing. According to the invention, the manual brake is adopted, during brake opening, the manual brake opening mechanism is manually pushed towards the brake opening indication direction, the movable iron core is driven, the insulator is driven by the bridge connecting lever to be connected with the moving contact of the vacuum arc extinguish chamber, the moving contact and the static contact of the vacuum arc extinguish chamber are pulled apart by 3mm, the bottom of the movable iron core and the end surface of the lower cover of the magnetic cylinder are attracted, and the closing spring and the auxiliary spring are compressed and stored with energy while being kept by the permanent magnet, so that the purpose of brake opening of the bypass vacuum contactor is achieved.

Drawings

Fig. 1 is a schematic structural view of a rapid single-phase bypass vacuum contactor.

In the figure: 1-fixing plate, 2-static end conductive copper bar, 3-insulating support column, 4-vacuum arc extinguish chamber, 5-first conductive flexible row, 6-fastening transmission shaft, 7-first moment conversion crank arm, 8-second conductive flexible row, 9-second moment conversion crank arm, 10-insulator, 11-moment conversion crank arm mounting seat, 12-insulating pull rod, 13-spring fixing seat, 14-closing spring, 15-first magnetic ring, 16-hand division crank arm, 17-upper end cover, 18-permanent magnet, 19-second magnetic ring, 20-first coil, 21-second coil, 22-lower end cover, 23-movable iron core, 24-auxiliary spring and 25-spring moment adjusting nut.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Referring to fig. 1, a fast single-phase bypass vacuum contactor comprises a permanent magnet driving mechanism, 4 insulating support columns 3, a fixed plate 1, a vacuum arc-extinguishing chamber 4, an insulator 10, an insulating pull rod 12, a first torque conversion connecting lever 7, a second torque conversion connecting lever 9 and a manual branch connecting lever 16, wherein the 4 insulating support columns 3, the fixed plate 1 and a magnetic cylinder upper cover 17 form a fixed frame, the fixed plate 1 above the frame is provided with a static end conductive copper bar 2 and the vacuum arc-extinguishing chamber 4, the static end conductive copper bar 2 and the vacuum arc-extinguishing chamber 4 are fixed with the fixed plate 1 through screws to form a power supply inlet end, the insulator 10 and the insulating pull rod 12 enable the lower end of the vacuum arc-extinguishing chamber 4 to be linked with a magnetic cylinder movable iron core 23 through the first torque conversion connecting lever 7 and the second torque conversion connecting lever 9, the lower end of the vacuum arc-extinguishing chamber 4 is respectively provided with a first conductive soft bar 5 and a second conductive soft bar 8, the first conductive soft row 5 and the second conductive soft row 8 form a power supply input end and a power supply output end, the permanent magnet driving mechanism is driven by double coils, and the two groups of coils are redundant to each other, the double coils comprise a first coil 20 and a second closing coil 21, the mechanism force ratio is amplified through the first torque conversion connecting lever 7 and the second torque conversion connecting lever 9, the specific magnetic cylinder force ratio is amplified through the first torque conversion connecting lever 7, the closing spring force ratio is amplified through the second torque conversion connecting lever 9, and the permanent magnet driving mechanism is composed of a magnetic cylinder, an upper end cover 17, a lower end cover 22, a permanent magnet 18, a first coil 20, a second coil 21, a magnetic ring 15, a closing spring 14, a spring fixing seat 13, a spring torque adjusting nut 25, the first torque conversion connecting lever 7, the second torque conversion connecting lever 9, a hand-operated connecting lever 16, a torque conversion connecting lever mounting bracket 11, a movable iron core 23 and an insulating pull rod 12.

As a further scheme of the invention: the method is characterized by comprising the following steps:

a, energy is stored when the vacuum arc-extinguishing chamber 4 is manually opened by applying the self-closing force, the closing spring and the auxiliary spring 24.

B, switching on the power supply, switching on the magnetic cylinder after the switching-on coil in the magnetic cylinder is excited, and generating a reverse magnetic circuit by reversely electrifying the switching-on coil, overcoming the holding force of the permanent magnet and passing through the self-closing force of the vacuum arc-extinguishing chamber, the switching-on spring and the auxiliary spring 24.

And C, simultaneously releasing instantly to push the moving contact of the vacuum arc extinguish chamber to a closed position of the static contact to complete switching on, and then switching on the coil to cut off the power supply through the auxiliary contact to complete a switching on task.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.