CN221651381U - Non-linkage type common-box isolated grounding combined switch - Google Patents

Abstract

The utility model relates to a non-linkage type common-box isolated grounding combined switch, which comprises a shell and a static conductor arranged in the shell, wherein a plurality of grounding static contact seats are arranged on the shell, a plurality of movable contact seat assemblies are arranged in the shell, the movable contact seat assemblies are arranged between the grounding static contact seats and the static conductor, the non-linkage type common-box isolated grounding combined switch also comprises a driving mechanism for driving movable contacts of the movable contact seat assemblies to be contacted with the grounding static contact seats and the static conductor, the plurality of movable contact seat assemblies are arranged around the static conductor, the movable contact seat assemblies extend along the radial direction of the static conductor, and one end of each movable contact seat assembly far away from the static conductor is arranged opposite to the grounding static contact seat.

Description

A non-linkage type common box isolation grounding combination switch

Technical Field

The utility model relates to the technical field of high-voltage electric power equipment, in particular to the field of combined electrical appliances, and specifically refers to a non-linkage type common box isolation grounding combined switch.

Background Art

As a reliable power equipment, combined electrical equipment (GIS) is widely used in power grid systems. GIS (Gas-lnsulated Metal-Enclosed Switchgear) is a complete set of switchgear consisting of circuit breakers, disconnectors, grounding switches, current transformers, voltage transformers, lightning arresters, busbars, inlet and outlet bushings or cable terminals, etc., which are enclosed in a grounded metal shell and filled with SF6 gas at a certain pressure as an insulating medium.

For combined electrical appliances with a rated voltage of 126kV to 145kV, a three-phase common box structure is generally adopted, and the internal isolating switch and grounding switch adopt a three-position form. Each unit component is integrated in the same module, which can realize the three working conditions of conduction, isolation and grounding. The three-phase common box three-position switch has a set of opening and closing devices, and is operated by an electric mechanism for three-phase linkage. The internal conductors of the conventional common box isolating and grounding switch are arranged in an "I" shape. The electric mechanism drives the internal moving contact through the insulating shaft to perform opening and closing operations. In special cases, when the isolating and grounding switch is required to be operated non-linked, single-phase independent operation cannot be achieved due to the limitations of its mechanism and conductor arrangement.

Summary of the invention

In view of the deficiencies in the prior art, the utility model provides a non-linked common-box isolating and grounding combination switch, which changes the arrangement of internal conductors to change the "I"-shaped arrangement of conventional three-phase conductors to a "pin"-shaped arrangement, and an electric mechanism or manual operation can be configured on the outside of the switch to achieve single-phase independent operation of the isolating and grounding switch.

The utility model is realized by the following technical scheme, and provides a non-linkage type common box isolation grounding combination switch, comprising a shell and a static conductor installed in the shell, a plurality of grounding static contact seats are installed on the shell, a plurality of moving contact seat assemblies are installed in the shell, each moving contact seat assembly is connected to a single phase, and also comprises a driving mechanism for driving the moving contact of the moving contact seat assembly to contact the grounding static contact seat and the static conductor.

The utility model connects a moving contact seat assembly to each single phase, and a driving mechanism is installed on each moving contact seat assembly, so that the three phases can independently realize the opening and closing operations. The moving contact of the moving contact seat assembly is driven to move by the driving mechanism, so that the moving contact is located at different positions. When the moving contact contacts the grounded static contact seat, the grounding condition is realized; when the moving contact contacts the static conductor, the conduction condition is realized; when the contact head is not in contact with the grounded static contact seat and the static conductor, the isolation condition is realized.

As an optimization, the moving contact seat assembly is installed between the grounded static contact seat and the static conductor, and several moving contact seat assemblies are arranged around the static conductor. The moving contact seat assembly extends radially along the static conductor, and one end of the moving contact seat assembly away from the static conductor is arranged opposite to the grounded static contact seat. The setting of this optimization scheme changes the "I"-shaped arrangement of the conventional three-phase conductor to a "pin"-shaped arrangement. Several moving contact seat assemblies share one static conductor, and the layout is convenient and simple. The moving contact slides inward to be inserted into the static conductor, and the moving contact slides outward to be inserted into the grounded static contact seat.

As an optimization, the housing is provided with a single-phase insulating support and a three-phase insulating support, the static conductor is installed on the single-phase insulating support, and the moving contact seat is installed on the three-phase insulating support. The setting of this optimization scheme can realize the transformation of the conductive circuit from three-phase to single-phase.

As an optimization, an inspection hole is provided on the housing, and an inspection cover is installed on the inspection hole. The configuration of this optimization solution facilitates the use of the inspection cover to open the air chamber and perform inspection operations on its internal components.

As an optimization, the driving mechanism includes an insulating torsion bar mounted on the movable contact seat assembly, and the insulating torsion bar is drivingly connected to the movable contact of the movable contact seat assembly. The configuration of this optimization scheme can make the movable contact slide along the axial direction of the movable contact seat assembly by rotating the insulating bar.

As an optimization, a manual operation hole is provided on the housing, and the insulating torsion bar extends into the manual operation hole. The setting of this optimization solution facilitates the staff to rotate the insulating torsion bar through the manual operation hole.

The beneficial effects of the utility model are as follows: when the insulating torsion bar inserted on the moving contact seat assembly rotates clockwise or counterclockwise, the moving contact on the moving contact seat assembly will be inserted into the static conductor or the grounding static contact seat respectively, and the three phases can independently realize the three working conditions of isolation, conduction and grounding. At the same time, mechanical locking is realized between the isolating switch and the grounding switch, which is safe and reliable; the three-phase moving contact seat can share the static conductor, and the upper and lower ends of the shell are respectively provided with single-phase and three-phase insulating supports to realize the transformation of the conductive circuit from three-phase to single-phase, with ingenious design and novel structure.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the utility model;

Figure 2 is a schematic diagram of the structure of the utility model from top view;

As shown in the figure:

1. Grounding static contact seat, 2. Moving contact seat assembly, 3. Single-phase insulation support, 4. Static conductor, 5. Inspection cover, 6. Support conductor, 7. Three-phase insulation support, 8. Manual operation hole, 9. Insulating torsion rod, 10. Shell.

DETAILED DESCRIPTION

In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

As shown in Figures 1 and 2, a non-linked common-box isolated grounding combination switch of the utility model includes a shell 10 and a static conductor 4 installed in the shell 10. The shell 10 is cylindrical and extends in the up-down direction. The upper end of the shell 10 is provided with a shell outlet, and the lower end of the shell 10 is provided with a shell inlet opposite to the shell outlet. The shell is provided with an inspection hole, which is provided on the side of the shell. There are three inspection holes, which are evenly distributed on the shell in the circumferential direction and extend radially along the shell 10.

A single-phase insulating support 3 and a three-phase insulating support 7 are provided on the shell 10. The single-phase insulating support 3 is provided at the shell outlet, and the single-phase insulating support 3 is fixed to the shell 10 via a sealing structure. The static conductor 4 is fixed to the single-phase insulating support 3 by bolts. The static conductor 4 is coaxial with the shell 10, and the static conductor 4 extends in the up and down directions. The static conductor 4 is triangular, and the three side surfaces of the static conductor 4 are connected by arc transitions. The three faces of the static conductor 4 are respectively facing three inspection holes, and the three sides of the static conductor 4 are respectively provided with conducting grooves.

A plurality of grounding static contact seats 1 are installed on the shell 10, and an inspection cover plate 5 is installed on the inspection hole, and the inspection cover plate 5 is sealed and fixed on the inspection hole. The grounding static contact seat 1 is fixed on the inspection cover plate 5 by bolts, and the grounding static contact seat 1 extends in the left and right direction, and the grounding static contact seat 1 faces the static conductor 4. A grounding groove is opened on the grounding static contact seat 1, and the grounding groove and the conducting groove are located in the same horizontal plane, and the corresponding grounding groove and the conducting groove are located on a straight line and extend in the same direction.

A plurality of moving contact seat assemblies 2 are installed in the shell 10. The moving contact seat assemblies 2 are prior art. The moving contact seat assemblies 2 include a shielding cover and a moving contact seat. A moving contact is slidably connected to the moving contact seat. A rack is arranged on the moving contact seat. A groove is provided on the moving contact seat. A transmission rod is installed in the groove. A gear is arranged at the end of the transmission rod. The gear is meshed with the rack of the moving contact. The moving contact can reciprocate along the left straight line above the moving contact seat inside the shielding cover driven by the transmission rod and the gear.

The three-phase insulating support 7 is sealed and fixed at the entrance of the shell. The insert position of the three-phase insulating support 7 is fixed with a supporting conductor 6 extending in the up-down direction. The moving contact seat assembly 2 is fixed at the top of the supporting conductor 6, so that the moving contact seat assembly 2 is installed on the three-phase insulating support 7. A plurality of moving contact seat assemblies 2 are arranged around the static conductor 4. There are three moving contact seat assemblies 2. Each moving contact seat assembly 2 is connected to a single phase. The three moving contact seat assemblies (2) are arranged in a "品" shape inside the shell, and the three phases are evenly distributed at 120 degrees.

The moving contact seat assembly 2 extends radially along the static conductor 4, and one end of the moving contact seat assembly 2 away from the static conductor 4 is arranged opposite to the grounded static contact seat 1. The moving contact seat assembly is installed between the grounded static contact seat 1 and the static conductor 4. The moving contact of the moving contact seat assembly 2 extends radially along the static conductor 4. The length of the moving contact is less than the vertical distance between the static conductor 4 and the grounded static contact seat 1. When the moving contact slides outward, it can be inserted into the grounding groove of the grounded static contact seat 1, and when the moving contact slides inward, it can be inserted into the conducting groove of the static conductor 4.

The present embodiment also includes a driving mechanism for driving the moving contact of the moving contact seat assembly 2 to contact the grounded static contact seat 1 and the static conductor 4, the driving mechanism includes an insulating torsion bar 9 installed on the moving contact seat assembly 2, the insulating torsion bar 9 is perpendicular to the moving contact seat assembly 2 and extends outward, the end of the insulating torsion bar 9 close to the moving contact seat assembly 2 is fixedly connected to the transmission rod of the moving contact seat assembly 2, so that the insulating torsion bar 9 is transmission-connected to the moving contact of the moving contact seat assembly 2, a manual operation hole 8 is provided on the shell, the manual operation hole 8 is consistent with the extension direction of the insulating torsion bar 9, the insulating torsion bar extends into the manual operation hole 8, and an electric mechanism can be provided at the end of the insulating torsion bar 9 away from the moving contact seat assembly 2 to realize the electric control of the rotation of the insulating torsion bar 9.

During use of this embodiment, the insulating torsion bar 9 is rotated clockwise, and the insulating torsion bar 9 drives the moving contact of the moving contact seat assembly 2 to slide outward, and the moving contact is inserted into the grounding groove of the grounded static contact seat 1, and it is in the grounding state at this time; the insulating torsion bar 9 is rotated counterclockwise, and the insulating torsion bar 9 drives the moving contact of the moving contact seat assembly 2 to slide inward, and the moving contact is inserted into the conducting groove of the static conductor 4, and it is in the conducting state at this time; when the two ends of the moving contact are not in contact with the grounded static contact seat 1 and the static conductor 4, it is in the isolation state at this time.

Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims (6)

1. A non-linkage type common-box isolated grounding combination switch is characterized in that: the novel electric power meter comprises a shell (10) and a static conductor (4) arranged in the shell (10), wherein a plurality of grounded static contact seats (1) are arranged on the shell, a plurality of movable contact seat assemblies (2) are arranged in the shell, each movable contact seat assembly (2) is connected with a single phase, and the novel electric power meter further comprises a driving mechanism for driving a movable contact of the movable contact seat assembly (2) to contact with the grounded static contact seats (1) and the static conductor (4).

2. The non-linked common-box isolated grounding combination switch of claim 1, wherein: the movable contact seat assembly is arranged between the grounding static contact seat (1) and the static conductor (4), a plurality of movable contact seat assemblies (2) are arranged around the static conductor (4), the movable contact seat assemblies (2) extend along the radial direction of the static conductor (4), and one end, far away from the static conductor (4), of each movable contact seat assembly (2) is arranged opposite to the grounding static contact seat (1).

3. The non-linked common-box isolated grounding combination switch of claim 1, wherein: be provided with single-phase insulating support (3) and three-phase insulating support (7) on the casing, quiet conductor (4) are installed on single-phase insulating support (3), and movable contact assembly (2) are installed on three-phase insulating support (7).

4. The non-linked common-box isolated grounding combination switch of claim 1, wherein: and the shell is provided with an access hole, and an access cover plate (5) is arranged on the access hole.

5. The non-linked common-box isolated grounding combination switch of claim 1, wherein: the driving mechanism comprises an insulating torsion bar (9) arranged on the movable contact seat assembly (2), and the insulating torsion bar (9) is in transmission connection with the movable contact of the movable contact seat assembly (2).

6. The non-linked common-box isolated grounding combination switch of claim 5, wherein: the shell is provided with a manual operation hole (8), and the insulating torsion bar extends into the manual operation hole (8).