CN102709833A - Conducting connecting device for electric switch - Google Patents

Abstract

The invention relates to a conductive connecting device for an electric switch. The conductive connecting device separates the two functions of optimizing the electric field and carrying current of the contact seat in the prior art, and divides it into a shielding cover for optimizing the electric field and a shield for responsible For the current-carrying contact seat, the contact fingers and the insulating guide ring are respectively installed on the outer peripheral surface of the contact seat, and the conductive tube is prevented from moving on the contact seat through the limiting platform protruding from the outer periphery of the contact seat , so that the blind hole structure of the contact seat in the prior art is removed, and it is ensured that the conductive tube will not move on the contact seat and collide with the shield, causing damage to the shield and reducing the overall volume and quality of the contact seat , and reduces the processing difficulty of the contact seat, reduces the manufacturing cost of the contact seat, and further solves the problem of the large shape volume and mass of the contact seat itself and the high manufacturing cost in the technology.

Description

Conductive connection device for electrical switch

technical field

The invention relates to the technical field of electric equipment, in particular to a conductive connection device for an electric switch.

Background technique

At present, in gas-insulated metal-enclosed switchgear, there are mainly two types of contact between the bus bar and the electrical connection: crimping type and plug-in type. Among them, the plug-in type mostly uses contact seats with spring contacts or strap contacts, or in A spring contact finger or a watch strap contact finger is installed on the conductive tube. For example, the Chinese invention patent with the application number of 200820228958.6 discloses a conductive connection device for gas-insulated metal-enclosed switchgear. The blind hole where the pipe extends into, and an annular groove for installing the spring contact finger and the insulating guide ring is opened on the wall of the blind hole, but with the technical parameters such as the rated current of the gas-insulated metal-enclosed switchgear getting higher and higher , according to the skin effect of alternating current, the cross-sectional diameter of the contact seat and the conductive tube is getting bigger and bigger, and this commonly used contact seat is made of a whole piece of metal, which needs to take into account the optimization of the electric field and the carrying conductor There are two functions of flow through, so there is a problem that the higher the switch parameter is, the larger the volume and mass of the contact base itself are, and the higher the manufacturing cost is.

Contents of the invention

The invention proposes a conductive connection device for an electric switch, aiming at solving the problems of the prior art that the contact base itself has a large external volume and mass, and high manufacturing cost.

The technical scheme of the conductive connection device for electric switch of the present invention is as follows:

A conductive connection device for an electrical switch, comprising a columnar contact seat and a conductive tube for electrical connection with the contact seat, the contact seat is equipped with contact fingers electrically connected to the conductive tube and between the contact seat and the contact tube. The insulating guide ring between the conductive pipes, and the contact finger installation groove for installing the contact finger and the guide ring installation groove for installing the insulating guide ring are opened on the contact seat, the contact finger installation groove and the guide ring The mounting grooves are all located on the outer periphery of the contact seat, the conductive tube is fitted around the outer peripheral surface of the contact seat, and a shield cover is provided around the contact seat for wrapping the connecting part of the conductive tube and the contact seat, Both the contact fingers and the insulating guide ring have an outer peripheral surface exposed from the outer peripheral surface of the contact seat and in contact with the inner wall surface of the conductive pipe, and the outer peripheral surface of the contact seat is protruded with a guide away from the contact finger installation groove. The limit platform on one side of the ring installation groove is used to prevent the conductive tube from moving axially on the outer peripheral surface of the contact seat.

The contact base is provided with a screw hole for fixing the contact base on the connecting insert of the insulating basin through connecting screws, and the screw hole extends along the axial direction of the contact base.

A blind hole extending along the axial direction is opened on the contact seat, and the screw hole is opened on the wall of the blind end of the blind hole.

The hole for the screw is a countersunk hole, and the hole for the screw has a countersunk section for wrapping around the head of the connecting screw.

There are at least two holes for the screws, and all the holes for the screws are distributed on the cross section of the contact seat at intervals.

The conductive pipe has a connection end away from the contact base for integral connection with the busbar conductor.

The shielding case is a thin-walled rotating shell made of thin-walled metal plate.

The said contact finger is a strap contact finger or a spring contact finger.

The conductive tube is a conductive metal hollow tube.

The present invention separates the two functions of optimizing the electric field and carrying current of the contact seat in the prior art, and divides it into a shield for optimizing the electric field and a contact seat for carrying the current, and separates the contact fingers and the insulating guide ring They are installed on the outer peripheral surface of the contact seat respectively, and the conductive tube is prevented from moving on the contact seat through the limit platform protruding from the outer periphery of the contact seat, so that the blind hole structure of the contact seat in the prior art Remove, and ensure that the conductive tube will not move on the contact seat and collide with the shield cover, causing damage to the shield cover, reducing the shape volume and quality of the contact seat, and reducing the processing difficulty of the contact seat, reducing the The manufacturing cost of the contact seat further solves the problem of the large volume and mass of the contact seat itself and the high manufacturing cost in the technology.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 of the present invention;

Fig. 2 is the structural representation of embodiment 2 of the present invention;

Fig. 3 is a schematic structural diagram of Embodiment 3 of the present invention.

Detailed ways

Embodiment 1 of the conductive connection device for electrical switch of the present invention: as shown in Figure 1, the conductive connection device includes a housing 1-1, an insulating basin 1-2 fixed to the port of the housing 1-1, an insulating basin 1- Between the connection insert 1-3 provided on 2, the columnar contact seat 1-5 fixed by the connection screw 1-4 on the connection insert 1-3, the contact seat 1-5 and the connection insert 1-3 The fixed shielding cover 1-6, the insulating guide ring 1-7 and the spring contact finger 1-8 installed on the outer periphery of the contact seat 1-5 are inserted on the outer periphery of the contact seat 1-5 and insulated from the outer periphery of the contact seat 1-5. The guide ring 1-7 and the spring contact finger 1-8 are in contact with the conductive tube 1-9, wherein the connecting end of the conductive tube 1-9 away from the contact seat is integrated with the bus conductor, and the shielding cover 1-6 has a The closing end 1-6-1 between the contact base 1-5 and the connection insert 1-3 of the insulating plate 1-2 and the opening end 1-6-2 that fits the gap with the outer peripheral surface of the conductive tube 1-9, The outer periphery of the contact base 1-5 is provided with a contact finger installation groove 1-5-1 for installing a spring contact finger 1-8 and a guide ring installation groove 1-5-2 for installing an insulating guide ring 1-7, and The spring contact finger 1-8 and the insulating guide ring 1-7 are all exposed from the outer peripheral surface of the contact seat 1-5; 1-5 is fixed on the screw hole 1-5-3 on the connection insert 1-3 of the insulating basin 1-2, and the screw hole 1-5-3 extends along the axial direction of the contact seat 1-5. On the outer peripheral surface of the contact base 1-5, a limiting platform 1-5-4 is protruded on the side of the contact finger installation groove 1-5-1 away from the guide ring installation groove 1-5-2.

When this embodiment is in use, the contact base 1-5 and the shielding cover 1-6 are first fixed on the connection insert 1-3 of the insulating basin 1-2 through the connecting screw 1-4, and then the insulating guide ring 1- 8 and the spring contact finger 1-7 are respectively installed in the guide ring installation groove 1-5-2 and the contact finger installation groove 1-5-1 opened on the contact seat 1-5, and the conductive tube 1-9 is inserted into the shielding cover In 1-6, at the same time, make the inner wall of the conductive tube 1-9 contact and cooperate with the insulating guide ring 1-8 and the spring contact finger 1-7 respectively; the limit table 1-5-4 is integrated with the contact seat 1-5 structure, the main purpose of setting the limit table 1-5-4 is to prevent the transitional displacement of the conductive tube 1-9 during installation and use, and collide with the shielding cover 1-6, causing the deformation of the shielding cover 1-6 and affecting the shielding electric field Function.

In this embodiment, the shielding case 1-6 is formed by spinning a thin-walled metal plate or cast into a thin-walled structure as required, and the shape of the shielding case 1-6 is determined according to the electric field structure that needs to be optimized; the contact finger mounting groove 1- 5-1 The number is more than one (including one) and less than four (including four), the specific number is determined according to the flow capacity between the required conductive tube 1-9 and the contact seat 1-5; the conductive tube 1- 9 is integrally arranged with the busbar conductor, and the conductive tube 1-9 is a hollow tube made of conductive material, such as aluminum, aluminum alloy, copper, copper alloy and other conductive materials, because the conductive tube 1-9 is welded in the static The structure on the contact body (not shown in the figure), so the conductive pipe 1-9 can also be made of thin-walled materials such as pipe profiles that have been simply processed, thereby reducing manufacturing costs and saving metal materials; insulation guides The ring 1-7 is installed on one side of the contact finger installation groove 1-5-2, and is used to guide the conductive tube 1-9 to correctly contact the spring contact finger 1-8, and at the same time prevent the conductive tube 1-9 from deviating from the contact seat 1- 5 axis.

This embodiment is mainly aimed at the conductive connecting device with low requirements for flow capacity and low requirements for the accuracy of the external dimensions of the contact bases 1-5. Because the cross-sectional area of the contact bases 1-5 in this structure is small, it is inconvenient to set the countersunk head The screw hole of the hole structure is 1-5-3, so the bolt hole 1-5-3 is a through hole, and the number of the bolt hole 1-5-3 can be one or at least two, when the bolt hole 1-5-3 When 5-3 is one, the bolt hole 1-5-3 is set coaxially with the contact seat 1-5; when there are at least two bolt holes 1-5-3, the bolt hole 1-5-3 is uniform Distributed in the circumferential direction of the contact base 1-5.

Embodiment 2 of the conductive connection device for electrical switch of the present invention: as shown in FIG. -5-3 is a countersunk hole, and the screw hole 2-5-3 has a countersunk section 2-5-4 for wrapping around the head of the connecting screw 2-4. There are two screw holes 2-5-3, and the two screw holes 2-5-3 are spaced apart from each other.

In the present embodiment, because the area of self cross-section of contact seat 2-5 is relatively large, and more than two circles of spring contact fingers 1-7 can be installed on the outer periphery of this contact seat 2-5 again, so need contact The screw hole 2-5-3 is provided on the seat 2-5 and is set as a countersunk hole to reduce the length of the connecting screw, and the head 2-1-1 of the connecting screw 2-4 is shielded by the contact seat 2-5, increasing The uniformity of the electric field distribution reduces the mass of the contact base 2-5. In addition, the specific number of screw holes 2-5-3 is also determined according to the actual situation.

Embodiment 3 of the conductive connection device for electrical switch of the present invention: as shown in Figure 3, the difference between this embodiment and the above two embodiments is that a blind hole extending along its axial direction is provided on the contact base 3-5 3-5-3, and the screw hole 3-5-4 is just offered on the blind end 3-5-5 hole wall of the blind hole 3-5-3.

This embodiment is mainly aimed at the conductive connection device with high flow capacity requirements. Because the contact seat 3-5 in this structure has a large cross-sectional area, the contact seat 3-5 can be processed by casting, forging, machining, etc. Open the blind hole 3-5-3 on the contact seat to reduce the length of the bolt hole 3-4, and can shield the head 3-1-4 of the connecting screw 3-4 through the blind hole 3-5-3. 1. To achieve the purpose of uniform electric field distribution, and the specific number of connecting screws 3-4 is generally not less than three, and they are evenly distributed on the end surface of the blind end 3-5-5 of the blind hole 3-5-3.

In the above embodiments, the contacts installed in the contact finger installation grooves are spring contacts. In other embodiments, the spring contacts can also be replaced by strap contacts.

In the above embodiments, the contact base is fixed on the connection insert on the insulating basin by connecting screws. In other embodiments, the contact base can also be fixed on the connection insert on the insulating basin by welding, bolting, etc. In the above, the connection method of the bolt connection is similar to the connection method of the screw connection, which belongs to the technology well known to those skilled in the art, so it will not be described again.

In the above-mentioned embodiments, the limit platform set on the contact seat for preventing the conductive tube from moving on the outer periphery of the contact seat is integrated with the contact seat. In other embodiments, the limit platform can also be a contact The retaining rings, retaining sleeves, nuts and other elements arranged on the outer periphery of the contact seat are replaced. These elements are arranged on the outer periphery of the contact seat to prevent the movement of the conductive tube, which belongs to the prior art, so it will not be described again.

Claims (9)

1. A conductive connecting device for an electric switch, comprising a columnar contact seat and a conductive tube for being electrically connected with the contact seat, the contact seat is equipped with a contact finger electrically connected with the conductive tube and a The insulating guide ring between the seat and the conductive tube, and the contact finger installation groove for installing the contact finger and the guide ring installation groove for installing the insulating guide ring are opened on the contact seat, and the feature is: the contact Both the finger mounting groove and the guide ring mounting groove are located on the outer periphery of the contact seat, the conductive tube is fitted around the outer peripheral surface of the contact seat, and a cover is provided around the contact seat for wrapping the conductive tube and the contact seat. The shielding cover of the connection part, the contact fingers and the insulating guide ring have an outer peripheral surface exposed from the outer peripheral surface of the contact seat and in contact with the inner wall surface of the conductive tube, and the outer peripheral surface of the contact seat is protruded with a contact Refers to the limit platform on the side of the installation groove away from the installation groove of the guide ring, which is used to prevent the axial movement of the conductive tube on the outer peripheral surface of the contact seat. 2. The conductive connecting device for an electric switch according to claim 1, characterized in that: the top of the contact seat is provided with a screw for fixing the contact seat on the connection insert of the insulating basin through the connecting screw. The hole for the screw extends along the axial direction of the contact seat. 3. The conductive connecting device for electric switch according to claim 2, characterized in that: said contact seat is provided with a blind hole extending along its axial direction, and said screw hole is provided in said blind hole on the wall of the blind end hole. 4. The conductive connecting device for an electric switch according to claim 2, characterized in that: the hole for the screw is a countersunk hole, and the hole for the screw has a countersunk for wrapping around the head of the connecting screw part. 5. The conductive connection device for an electric switch according to any one of claims 1 to 4, characterized in that: there are at least two holes for the screws, and all the holes for the screws are distributed at intervals on the transverse direction of the contact seat. section. 6 . The conductive connecting device for an electric switch according to any one of claims 1 to 4 , wherein the conductive tube has a connecting end far away from the contact base for integral connection with the busbar conductor. 7 . 7. The conductive connecting device for an electric switch according to any one of claims 1 to 4, wherein the shielding case is a thin-walled rotary housing made of a thin-walled metal plate. 8. The conductive connecting device for an electric switch according to any one of claims 1 to 4, wherein the contact fingers are strap contacts or spring contact fingers. 9. The conductive connection device for an electric switch according to any one of claims 1 to 4, wherein the conductive tube is a conductive metal hollow tube.

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