CN216818958U

CN216818958U - Integrated contact box for switch equipment

Info

Publication number: CN216818958U
Application number: CN202121823318.1U
Authority: CN
Inventors: 孟鹤; 吴昊
Original assignee: Chint Electric Co Ltd
Current assignee: Chint Electric Co Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-06-24
Anticipated expiration: 2031-08-05

Abstract

The utility model discloses an integrated contact box for switch equipment, which is characterized by comprising a contact box body, wherein a plurality of pre-buried static contacts are arranged on the contact box body, ventilation and convection holes are formed in the upper ends and the lower ends of the pre-buried static contacts, the pre-buried static contacts are connected with a round pipe bus, the contact end of the round pipe bus is in an outer cone shape, and a steel wire thread sleeve matched with an inner cone in the pre-buried static contacts is arranged in the outer cone shape. The utility model has the characteristics of adopting a three-phase integrated contact box with ventilation and a front-end conical round pipe bus embedded with a steel wire thread sleeve.

Description

Integrated contact box for switch equipment

Technical Field

The utility model relates to an integrated contact box for switchgear, and belongs to the field of medium-voltage air-insulated alternating-current metal-enclosed switchgear.

Background

At present, air is mainly used as an insulating medium in medium-voltage extractable air-insulated alternating-current metal-enclosed switchgear, and meanwhile, an insulating part (a contact box) is used for ensuring the continuity of a live conductor when the live conductor passes through different compartments. To current medium voltage switchgear, especially miniaturized equipment, because its size is less, the overall arrangement of the inside electrified conductor of equipment and its grounded casing is mostly irregular, and the inside electric field intensity of equipment is great, and electric field distribution is inhomogeneous, very easily leads to the product after long-time operation, and the problem of frequent discharge influences switchgear's overall reliability.

On the other hand, the conductor in the existing switchgear mainly adopts a rectangular section copper bar as a current-carrying bus, along with the increase of current, the current-carrying capacity on the unit section of the bus is reduced, and the temperature rise requirement can be met only by increasing the sectional area of the bus, so that a larger space is needed, the size of the switchgear is increased, and the cost is increased.

Meanwhile, most static contacts are assembled in the contact box, assembly deviation exists, when the movable and static contacts are meshed at the working positions, larger deviation exists, and operation faults are easy to cause.

Disclosure of Invention

The technical problem to be solved by the utility model is as follows: the existing contact box has irregular structure and easily causes the technical problem of uneven electric field distribution.

In order to solve the technical problems, the technical scheme of the utility model is to provide an integrated contact box for a switch device, which is characterized by comprising a contact box body arranged on the switch device, wherein a plurality of embedded static contacts are arranged on the contact box body and are used for connecting a circular tube bus.

Preferably, the contact box body and the embedded type fixed contact are of an integrated casting molding structure.

Preferably, the pre-buried type static contact is provided with a ventilation convection hole.

Preferably, the ventilation convection holes are symmetrically arranged above and below the embedded type fixed contact.

Preferably, the embedded type static contact and the round tube bus are connected in a split type manner.

Preferably, the round tube bus is provided with a contact end, and the contact end is detachably connected with the embedded static contact.

Preferably, the contact end is an outer cone, an inner cone is arranged on the pre-buried static contact, and the contact end is sleeved on the inner cone.

Preferably, the inner cone is provided with an external thread, and the contact end is provided with a steel wire thread sleeve.

Preferably, the inner cone is provided with a clamping groove, and the contact end is provided with a spring plate.

Preferably, the number of the embedded static contacts is 3.

The utility model has the characteristics that:

1. the low-current scheme is a three-phase integrated contact box, the miniaturization requirement of the cabinet body is fully considered, and the performance requirements of supporting and insulating partition are considered;

2. the static contact adopts a pre-buried and integrated structure, so that the installation procedures are reduced, and the installation error is avoided; and a tapered opening is formed in the top end of the connecting rod, and the tapered opening is convenient to be matched with the rear-end tubular bus.

3. The pipe generating line, the electric field is even, and the current-carrying capacity is arranged greatly for the rectangle, consequently better promotes whole insulating and temperature rise performance.

4. The outside toper scheme that adopts of pipe generating line front end, inside embedding steel wire thread bush solve with the static contact installation problem, increase electrically conductive area simultaneously, improve the temperature rise.

5. The rear end of the tubular bus is close to the lap joint of the top main bus, and a convection hole is formed, so that the heat dissipation efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the connection of the present invention;

FIG. 3 is a schematic diagram of the connection of the present invention;

fig. 4 is a schematic view of the installation of the present invention.

Detailed Description

In order to make the utility model more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 4, an integral type contact box for a switchgear is characterized by comprising a contact box body 1, wherein a plurality of pre-buried static contacts 2 are arranged on the contact box body 1, the contact box body 1 and the pre-buried static contacts 2 are integrally cast and fixed, ventilation convection holes 5 are formed in the upper ends and the lower ends of the pre-buried static contacts 2, the pre-buried static contacts 2 and a round pipe bus 3 are detachably connected in a split manner, a contact end 6 of the round pipe bus 3 is in an outer cone shape, an inner cone 7 is arranged inside the pre-buried static contacts 2, the contact end 6 and the inner cone 7 are detachably connected, external threads are arranged on the inner cone 7, a steel wire thread bushing 4 matched with the inner cone is arranged inside the contact end, or a clamping groove is formed in the inner cone 7, and an elastic sheet is arranged inside the contact end and is connected with the clamping groove in a clamping manner.

The static contact and the contact box are embedded into a whole, no installation error exists between the static contact and the contact box, bad heating caused by bad matching with the moving contact can be effectively reduced, special air ducts are arranged at the upper part and the lower part of the contact device, air can effectively circulate, and the split structure of the branch bus conductor and the static contact can adopt different conductor outer diameter sections, so that the cost is saved.

Claims

1. The integrated contact box for the switch equipment is characterized by comprising a contact box body (1) arranged on the switch equipment, wherein a plurality of pre-embedded static contacts (2) are arranged on the contact box body (1), and the pre-embedded static contacts (2) are used for being connected with a round pipe bus (3); the contact box body (1) and the embedded type static contact (2) are of an integral casting molding structure.

2. The integral contact box for the switch equipment according to claim 1, wherein the embedded static contact (2) is provided with a ventilation convection hole (5).

3. The integral contact box for the switch equipment according to claim 2, wherein the ventilation convection holes (5) are symmetrically arranged above and below the embedded static contact (2).

4. The integral contact box for the switch equipment according to claim 1, wherein the embedded static contact (2) and the round tube bus bar (3) are connected in a split type.

5. The integral contact box for the switch equipment according to claim 4, wherein the round pipe bus bar (3) is provided with a contact end, and the contact end is detachably connected with the embedded static contact (2).

6. The integral contact box for the switch equipment according to claim 5, wherein the contact end is externally tapered, an inner cone (7) is arranged on the embedded static contact (2), and the contact end is sleeved on the inner cone (7).

7. The box according to claim 6, wherein the internal cone (7) is provided with an external thread and the contact end is provided with a wire thread bushing (4).

8. The integrated contact box for the switching device according to claim 6, wherein the inner cone (7) is provided with a locking groove, and the contact end is provided with a spring plate.

9. The integral contact box for the switch equipment according to claim 1, wherein the number of the embedded static contacts (2) is 3.