CN2355417Y

CN2355417Y - Load switch

Info

Publication number: CN2355417Y
Application number: CN 99223312
Authority: CN
Inventors: 白竞; 李伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-01
Filing date: 1999-04-01
Publication date: 1999-12-22
Anticipated expiration: 2009-04-01

Abstract

The utility model relates to a load change-over switch, which is used for switching-in and breaking in low voltage circuits and conversion in special situations in the field of power transmission and power distribution. The utility model is characterized in that an accelerator is composed of a spring, a link rod, a shaft, a connecting piece, a rotary shaft and a bracket; a fixed contact is fixed on a switch housing by screws, spring pieces of an upper moving contact and a lower moving contact are fixed on a contact bracket, one end of the spring is arranged in the switch housing and the other end of the spring is arranged on the connecting piece by the link rod, and the bracket is provided with the rotary shaft which is arranged on the connecting piece by the link rod; each component of the accelerator is arranged in the housing of the accelerator, and the housing is arranged on the switch housing by screws. The utility model has the characteristics of good insulating property, high safety, high-speed switching-in and breaking, and strong anti-shock and arc resistance ability.

Description

The load transition switch

The utility model relates to a kind of transmission of electricity, distribution field load transition switch, plays the usefulness of connection, disjunction and the conversion of circuit special circumstances in low-voltage circuit.

At present; though the low-voltage electrical apparatus distribution technique has had significant progress; various novel power distribution cabinets and relevant element arise at the historic moment; but have only only that the load transition switch still uses be five, the old product in the sixties; the design of these products is relatively backward, does not match very much with novel power distribution cabinet, and mainly exist following defective in the use: (1) isolating switch all operations element, conducting element, contact all expose; without any protective device, very easily cause unsafe factor.(2) moving, heat-staple anti-melting welding ability.(3) switch closes, divides by manpower, and speed is slow, electric arc is big.Owing to exist above deficiency in the prior art, therefore this change over switch can not satisfy the requirement of modern low-voltage electrical apparatus.

The purpose of this utility model is exactly to provide the load transition that a kind of design science is reasonable, safe and reliable, electric property is stable switch to people.To satisfy the usefulness of low voltage power transmission, distribution.

For achieving the above object, the utility model has adopted following technical scheme: the load transition switch comprises switch case (1), fixed contact (2), goes up lower moving contact (3), spring leaf (4), contact supporting (5) and accelerator.Its accelerator mainly is made of spring (6), link rod (7), axle (8), connector (9), link rod (10), rotating shaft (11) and support (12).Concrete structure is such: fixed contact (2) by screw on switch case (1); Upper and lower moving contact (3) is fixed on the contact supporting (5) by spring leaf (4), and an end shock mount (6) of link rod (7) also is fixed on a side of accelerator housing; The other end is contained in the opposite side of accelerator housing by axle (8), and an end of link rod (10) is contained in the middle part of link rod (7), also is contained in the upper end of connector (9) simultaneously; The other end is contained in the rotating shaft (11), and rotating shaft (11) is contained on the support (12).The operation principle of load transition switch is: rotate rotating shaft (11) and drive link rod (10) compression spring (6), making spring (6) be compressed to this process of B by A is thermal energy storage process; After crossing initial point B, the urgent release of the energy of spring (6) rotates to C, finish the accelerator of accelerator, spring (6) is when rotating to C by A, then drive connector (9) and do rectilinear motion, connector (9) drives contact supporting (5) and does rectilinear motion, and repeatable operation makes upper and lower moving contact (3) and fixed contact (2) finish the transfer process of quick connection or disjunction.

The utility model is compared with existing product, has following characteristics: a, all mechanical organs, and dynamic/static contact etc. all are installed in the accelerator housing and switch case by unsaturated polyester carbonic ester (DMC) material, and the motion process of element all carries out in housing.Have good insulation performance, can greatly improve the fail safe of operation.The DMC housing has good fire-retardant, impact resistance, are-tight ability is strong.B, moving contact take upper and lower double-layer structure to contact with fixed contact, can reduce contact temperature rise, improve electric conductivity and the anti-melting welding ability of contact when dynamic and thermal stability.C, accelerator utilize spring energy-storage, cross the design philosophy that the initial point energy discharges rapidly, make quick connection of contact or disjunction and switch dual power supply.Because speed reduced the arcing of contact when disjunction soon, its speed be that the people is beyond power soon.

The utility model is described in further detail below in conjunction with specific embodiment and accompanying drawing.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is an off-state schematic diagram of the present utility model.

With reference to Fig. 1,2, the load transition switch comprises switch case 1, fixed contact 2, goes up lower moving contact 3, spring leaf 4, contact supporting 5 and accelerator.Its accelerator mainly is made of spring 6, link rod 7, axle 8, connector 9, link rod 10, rotating shaft 11 and support 12.Concrete structure is such: fixed contact 2 by screw on switch case 1; Upper and lower moving contact 3 is fixed on the contact supporting 5 by spring leaf 4, and an end shock mount 6 of link rod 7 also is fixed on a side of accelerator housing; The other end is contained in the opposite side of accelerator housing by axle 8, and an end of link rod 10 is contained in the middle part of link rod 7, also is contained in the upper end of connector 9 simultaneously; The other end is contained in the rotating shaft 11, and rotating shaft 11 is contained on the support 12.

Claims

1, a kind of load transition switch, comprise switch case (1), fixed contact (2), go up lower moving contact (3), spring leaf (4), contact supporting (5) and accelerator, it is characterized in that: accelerator mainly is made of spring (6), link rod (7), axle (8), connector (9), link rod (10), rotating shaft (11) and support (12), fixed contact (2) by screw on switch case (1); Upper and lower moving contact (3) is fixed on the contact supporting (5) by spring leaf (4), and an end shock mount (6) of link rod (7) also is fixed on a side of accelerator housing; The other end is contained in the opposite side of accelerator housing by axle (8), and an end of link rod (10) is contained in the middle part of link rod (7), also is contained in the upper end of connector (9) simultaneously; The other end is contained in the rotating shaft (11), and rotating shaft (11) is contained on the support (12).