CN205303318U

CN205303318U - Vacuum interrupter of drop -out current ability reinforce

Info

Publication number: CN205303318U
Application number: CN201521058273.8U
Authority: CN
Inventors: 林建飞; 贡朱君
Original assignee: JIANGSU WEIAISI ELECTRICAL APPLIANCE CO Ltd
Current assignee: JIANGSU WEIAISI ELECTRICAL APPLIANCE CO Ltd
Priority date: 2015-12-18
Filing date: 2015-12-18
Publication date: 2016-06-08
Anticipated expiration: 2025-12-18

Abstract

The utility model relates to a vacuum interrupter of drop -out current ability reinforce, including one shell (1), move and be provided with one section bellows (8) in conducting rod (5), the outside cover of static contact (6) and moving contact (7) has contact shield cover (9), the outside cover of bellows (8) has bellows shield cover (10), the outside cover of shell (1) has the insulating cover of silica gel (11), and it has strengthening rib (12) all to weld on static contact (6), moving contact (7), and strengthening rib (12) go up to open there are four straight flute (12.1). This kind of vacuum interrupter of drop -out current ability reinforce can avoid the displacement of insulating cover, reduces the collision of contact rigidity, and dielectric strength recovery rate is fast behind the arc.

Description

The vacuum interrupter that drop-out current ability is strong

Technical field

This utility model relates to the vacuum interrupter that a kind of drop-out current ability is strong.

Background technology

Vacuum interrupter, have another name called vacuum switch tube, it it is the core component of mesohigh power switch, its Main Function is, by can blow-out suppress electric current rapidly after managing the excellent insulating properties of interior vacuum and making mesohigh circuitry cuts power supply, avoid accident and unexpected generation, be mainly used in the transmission & distribution electric control system of electric power, be also applied to the distribution systems such as metallurgy, mine, oil, chemical industry, railway, broadcast, communication, industry high-frequency heating. There is energy-conservation, material-saving, fire prevention, the feature such as explosion-proof, volume is little, life-span length, maintenance cost are low, reliable and pollution-free. Vacuum interrupter is divided into again arc extinguishing chamber for breaker and on-load switch arc-chutes purposes, and arc-extinguishing chamber of circuit breaker is mainly used in the transformer station in power department and electrical network facilities, and on-load switch arc-chutes are mainly used in the terminal use of electrical network.

But after the contact of conventional vacuum interrupter generation electric arc, after arc, dielectric strength resume speed is relatively slow, and arc stiffness is higher, and corrosion rate is very fast, causes that the drop-out current ability of vacuum interrupter is poor, and have impact on its service life.

After conventional vacuum interrupter is installed with insulation sleeve, insulation sleeve is susceptible to relative displacement in vacuum extinction outdoor face, thus causing security incident.

And vacuum interrupter is in making process, moving contact forms rigid collision with static contact, easily produce spring, in vacuum circuit breaker, mechanical property produce spring more than more than 3ms, small?gap suture arcing between two contact electrodes, increase the weight of the electric scaling loss of electrode, have a strong impact on the vacuum interrupter life-span, electrical network is impacted simultaneously, produce overvoltage.

Utility model content

This utility model is in that to overcome above-mentioned deficiency, it is provided that one avoids insulation sleeve displacement, reduces contact rigid collision, the vacuum interrupter that drop-out current ability that after arc, dielectric strength resume speed is fast is strong.

The purpose of this utility model is achieved in that

The vacuum interrupter that a kind of drop-out current ability is strong, including a shell, described shell is metallization porcelain shell, the top of described shell is provided with quiet end cap, outer casing bottom is provided with moved end lid, the center vertical of described quiet end cap is installed with a static conductive rod, the center vertical of moved end lid is installed with a moving conductive rod, the bottom of described static conductive rod is fixed with static contact, the top of described moving conductive rod is fixed with moving contact, described static contact and moving contact cooperate, described moving conductive rod is provided with one section of corrugated tube, the outside of described static contact and moving contact is cased with contact shield cover, the outside of described corrugated tube is cased with bellows shield cover,

The outside of described shell is cased with silica gel insulation sleeve, the outer wall of shell is provided with the key of multiple vertical bar radially consistent with shell, the inwall of silica gel insulation sleeve offers a plurality of keyway matched with key, key and keyway Matching installation;

All being welded with reinforcement on described static contact, moving contact, described reinforcement is spherical in shape, and the bottom welding of the top surface of this spherical reinforcement and static contact and moving contact is fixed, and described reinforcement has four straight troughs.

The vacuum interrupter that this utility model drop-out current ability is strong has the advantage that

The vacuum interrupter that this drop-out current ability is strong passes through at static contact, the outside sheathed contact shield cover of moving contact, and at the outside sheathed bellows shield cover of corrugated tube, so that vacuum interrupter has dielectric strength resume speed after higher arc, less arc stiffness and corrosion rate, and then improve drop-out current ability and the service life of vacuum interrupter.

Simultaneously by arranging multiple key on the shell of vacuum interrupter, and inside the insulation sleeve of vacuum extinction outdoor, offer the keyway matched with described key, undertaken insulation sleeve and vacuum interrupter matching after installation, limit insulation sleeve in vacuum extinction outdoor face generation relative displacement.

And on static contact and moving contact, added reinforcement, such structure both ensure that the sufficient intensity needed for contact, the deformation produced further through the arcuate surfaces of spherical structure absorbs energy during combined floodgate, reduces because the spring between the rigid collision moving contact and the static contact that cause.

Accompanying drawing explanation

Fig. 1 is the structural representation of the vacuum interrupter that this utility model drop-out current ability is strong.

Fig. 2 is the top view of Fig. 1 housing.

Fig. 3 is the structural representation of silica gel insulation sleeve in the vacuum interrupter that this utility model drop-out current ability is strong.

Fig. 4 is the enlarged drawing at static contact place in Fig. 1.

Fig. 5 is the top view of reinforcement in Fig. 4.

Wherein: shell 1, key 1.1, quiet end cap 2, moved end lid 3, static conductive rod 4, moving conductive rod 5, static contact 6, moving contact 7, corrugated tube 8, contact shield cover 9, bellows shield cover 10, silica gel insulation sleeve 11, keyway 11.1, reinforcement 12, straight trough 12.1.

Detailed description of the invention

Referring to Fig. 1 to Fig. 5, this utility model relates to the vacuum interrupter that a kind of drop-out current ability is strong, including a shell 1, described shell 1 is metallization porcelain shell, the top of described shell 1 is provided with quiet end cap 2, moved end lid 3 it is provided with bottom shell 1, the center vertical of described quiet end cap 2 is installed with a static conductive rod 4, the center vertical of moved end lid 3 is installed with a moving conductive rod 5, the bottom of described static conductive rod 4 is fixed with static contact 6, the top of described moving conductive rod 5 is fixed with moving contact 7, described static contact 6 cooperates with moving contact 7, when moving conductive rod 5 pulls downward on, moving contact 7 separates with static contact 6, when moving conductive rod 5 is loosed one's grip, moving contact 7 contacts with static contact 6, described moving conductive rod 5 is provided with one section of corrugated tube 8, the outside of described static contact 6 and moving contact 7 is cased with contact shield cover 9, the outside of described corrugated tube 8 is cased with bellows shield cover 10, by at static contact, the outside sheathed contact shield cover of moving contact, and at the outside sheathed bellows shield cover of corrugated tube, so that vacuum interrupter has dielectric strength resume speed after higher arc, less arc stiffness and corrosion rate, and then improve drop-out current ability and the service life of vacuum interrupter.

The outside of described shell 1 is cased with silica gel insulation sleeve 11, the outer wall of shell 1 is provided with the key 1.1 of multiple vertical bar radially consistent with shell, the inwall of silica gel insulation sleeve 11 offers a plurality of keyway 11.1 matched with key 1.1, after key 1.1 and keyway 11.1 Matching installation, silica gel insulation sleeve 11 and shell 1 complete to fix, thus limiting silica gel insulation sleeve 11 in vacuum extinction outdoor face generation relative displacement.

Described static contact 6, moving contact 7 are all welded with reinforcement 12, described reinforcement 12 is spherical in shape, the bottom welding of the top surface of this spherical reinforcement 12 and static contact 6 and moving contact 7 is fixed, described reinforcement 12 has four straight troughs 12.1, described straight trough 12.1 is used for increasing deformation produced by spherical reinforcement 12.1 during collision, thus energy when absorbing combined floodgate, reduce because the spring between the rigid collision moving contact and the static contact that cause.

Claims

1. the vacuum interrupter that a drop-out current ability is strong, it is characterized in that: include a shell (1), described shell (1) is metallization porcelain shell, the top of described shell (1) is provided with quiet end cap (2), shell (1) bottom is provided with moved end lid (3), the center vertical of described quiet end cap (2) is installed with a static conductive rod (4), the center vertical of moved end lid (3) is installed with a moving conductive rod (5), the bottom of described static conductive rod (4) is fixed with static contact (6), the top of described moving conductive rod (5) is fixed with moving contact (7), described static contact (6) and moving contact (7) cooperate, described moving conductive rod (5) is provided with one section of corrugated tube (8), the outside of described static contact (6) and moving contact (7) is cased with contact shield cover (9), the outside of described corrugated tube (8) is cased with bellows shield cover (10),

The outside of described shell (1) is cased with silica gel insulation sleeve (11), the outer wall of shell (1) is provided with the key (1.1) of multiple vertical bar radially consistent with shell, the inwall of silica gel insulation sleeve (11) offers a plurality of keyway (11.1) matched with key (1.1), key (1.1) and keyway (11.1) Matching installation;

Described static contact (6), moving contact (7) are all welded with reinforcement (12), described reinforcement (12) is spherical in shape, the bottom welding of the top surface of this spherical reinforcement (12) and static contact (6) and moving contact (7) is fixed, and described reinforcement (12) has four straight troughs (12.1).