CN218996588U

CN218996588U - Isolating switch shared by voltage transformer and lightning arrester

Info

Publication number: CN218996588U
Application number: CN202223148139.XU
Authority: CN
Inventors: 梁孝峰; 杜洪文; 王爱华; 刘兴洪; 陈章丽
Original assignee: Shandong Taikai High Volt Switchgear Co Ltd
Current assignee: Shandong Taikai High Volt Switchgear Co Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-05-09
Anticipated expiration: 2032-11-23

Abstract

The utility model provides an isolating switch shared by a voltage transformer and a lightning arrester, which relates to the field of isolating switches shared by the voltage transformer and the lightning arrester, and adopts the following scheme: the lightning arrester is characterized by comprising a shell, wherein a transition contact is arranged inside the shell, one end of the transition contact is electrically connected with a main loop of a high-voltage combined electrical apparatus, the other end of the transition contact can be electrically connected with a static contact through a moving contact, the moving contact can move up and down in the transition contact, the upper end of the moving contact is connected with a driving assembly, the lower end of the moving contact can be electrically connected with and disconnected from the upper end of the static contact, the static contact is arranged inside the shell, and the static contact is used for being electrically connected with a lightning arrester and a voltage sensor respectively. The utility model can lead the voltage transformer and the lightning arrester to share one isolating switch, reduces the space occupation and has lower equipment cost and maintenance cost.

Description

Isolating switch shared by voltage transformer and lightning arrester

Technical Field

The utility model relates to the field of isolating switches shared by a voltage transformer and a lightning arrester, in particular to an isolating switch shared by the voltage transformer and the lightning arrester.

Background

In order to protect a GIS high-voltage combined electrical apparatus from lightning and partial operation overvoltage damage, a lightning arrester is usually arranged between lines, a voltage transformer is also arranged at intervals of the lines, two devices of the voltage transformer and the lightning arrester are arranged at intervals of the lines, certain influence is brought to interval installation, voltage resistance and later maintenance, a detachable connecting conductor or an isolating switch is usually added between a main loop and the voltage transformer and the lightning arrester for facilitating equipment installation, maintenance and operation, particularly, a cable connected interval is adopted, the voltage transformer and the lightning arrester are built-in devices, the isolating switch is added between the main loop and the voltage transformer and the lightning arrester for facilitating equipment installation interval voltage resistance and later equipment maintenance, the isolating switch is arranged to enable equipment installation stage one-time installation to be completed, and the voltage transformer and the lightning arrester only need to be disconnected through an isolating motor during the voltage resistance and later maintenance, so that the connecting conductor between the main loop and the voltage transformer and the lightning arrester does not need to be detached, and the equipment installation time is reduced.

However, in the prior art, one isolating switch can only be connected with one of the voltage transformer and the lightning arrester, so that in order to ensure that the voltage transformer and the lightning arrester can be controlled to be powered off and on, a plurality of isolating switches are required to be installed for independent control, the space occupation is large, and the equipment cost and the maintenance cost are high.

Therefore, in view of the current situation existing in the prior art, developing a disconnecting switch shared by a voltage transformer and a lightning arrester is an urgent problem to be solved.

Disclosure of Invention

In order to solve the problems that in the prior art, the voltage transformer and the lightning arrester are respectively connected with an electric isolating switch, so that the space occupation is large and the cost is high, the utility model provides the isolating switch shared by the voltage transformer and the lightning arrester, which can enable the voltage transformer and the lightning arrester to share the isolating switch, so that the space occupation is reduced, and the equipment cost and the maintenance cost are lower.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a voltage transformer and isolator shared isolator, includes the casing, the inside transition contact that is provided with of casing, the one end and the main loop electricity of high-voltage combined electrical apparatus of transition contact are connected, the other end of transition contact can be connected with the static contact electricity through the moving contact, the moving contact can reciprocate in the transition contact, the moving contact upper end is connected with drive assembly, the lower extreme of moving contact can be connected with the static contact electricity and break off, the static contact sets up inside the casing, the static contact is used for being connected with arrester and voltage sensor electricity respectively. Through the synergism of the driving component, the moving contact, the transition contact and the fixed contact, an operator can control whether the transition contact and the fixed contact are electrified according to the needs, so that the main loop of the high-voltage combined electrical apparatus is connected and disconnected with the lightning arrester and the voltage transformer at the same time, an isolation section is shared, and the space occupation and the equipment cost are reduced.

Further, the driving assembly comprises an electric actuating mechanism I and an insulating pull rod which are connected with each other, the electric actuating mechanism I is arranged at the upper end of the shell, the electric actuating mechanism I is electrically connected with a controller of the high-voltage combined electrical apparatus, the insulating pull rod is connected with the upper end of the movable contact, and the electric actuating mechanism I can drive the movable contact to move up and down in the transition contact. The electric actuating mechanism I can automatically realize the simultaneous connection and disconnection of the main loop of the high-voltage combined electrical apparatus, the lightning arrester and the voltage transformer, and the automation level of the isolating switch is improved.

Further, a first spring contact is arranged at the upper end of the static contact, and when the moving contact moves down to the end position, the moving contact can press the first spring contact. The first spring contact piece ensures that the moving contact and the fixed contact are good in electric conduction on one hand, and the moving contact is not influenced on the other hand.

Further, a first connecting flange is arranged on the shell and is used for being connected with the main body of the high-voltage combined electrical apparatus, a first basin-type insulator is arranged between the first connecting flange and the main body of the high-voltage combined electrical apparatus, a first protruding portion of the basin-type insulator is provided with a first conductive core, one end of the first conductive core is in contact with the transition contact, and the other end of the first conductive core is used for being electrically connected with a main circuit of the high-voltage combined electrical apparatus. The transition contact and the main loop can be conductive smoothly.

Further, the shell lower extreme is provided with flange two, flange two is used for being connected with the arrester, be provided with basin insulator two between flange two and the arrester, basin insulator two bulge is provided with conductive core two, conductive core two's one end with the contact of stationary contact lower extreme, conductive core two's the other end is used for being connected with the arrester electricity. The static contact and the lightning arrester can conduct electricity smoothly.

Further, one side of the shell is provided with a third connecting flange, the third connecting flange is used for being connected with a voltage transformer, a third basin-type insulator is arranged between the third connecting flange and the voltage transformer, a third conductive core is arranged on the third convex portion of the basin-type insulator, one end of the third conductive core is used for being electrically connected with the voltage transformer, the other end of the third conductive core is in contact with a connecting conductor, and the connecting conductor is electrically connected with the static contact. The static contact and the voltage transformer can be smoothly conductive.

Further, a connecting flange IV is arranged on one side, opposite to the connecting flange III, of the shell, an electric actuating mechanism II is arranged on the connecting flange IV and is electrically connected with a controller of the high-voltage combined electrical apparatus, the electric actuating mechanism II can drive a grounding conductor to move, and the grounding conductor can be electrically connected with and disconnected from the static contact. The isolation switch can be grounded through the action of the second electric actuating mechanism and the grounding conductor, so that the safety of operators is ensured.

Further, be provided with the mounting hole on the static contact, the axis of mounting hole with the axis of static contact is perpendicular, the mounting hole runs through the static contact, the one end of mounting hole is provided with spring contact two, the earthing conductor can stretch into in the mounting hole and with spring contact two contacts, the other end of mounting hole is provided with the mount pad, the one end of mount pad is provided with the connecting hole, be provided with conductive spring in the connecting hole, the connecting conductor sets up in the connecting hole and with conductive spring contacts, the other end of mount pad is provided with plum blossom contact, the earthing conductor can with plum blossom contact. Through mounting hole, plum blossom contact, spring contact two, conductive spring and mount pad, can guarantee that the ground conductor is good electrically conductive with arrester and voltage transformer, avoid electrically conductive inefficacy.

Further, a boss is arranged on the circumferential surface of the static contact, the mounting hole penetrates through the boss, the mounting seat is in a convex shape, one end of the mounting seat is connected with the boss through a bolt, a shielding cover is arranged on the boss, and the shielding cover covers the boss and the mounting seat inside the shielding cover. The installation of the convenient installation seat through the boss simultaneously sets up the shield cover, avoids having the point discharge phenomenon.

From the above technical scheme, the utility model has the following advantages:

the scheme provides the isolating switch shared by the voltage transformer and the lightning arrester, through the synergistic effect of the driving component, the moving contact, the transition contact and the fixed contact, an operator can control whether the transition contact and the fixed contact are electrified or not according to the requirement, so that the main loop of the high-voltage combined electrical apparatus, the lightning arrester and the voltage transformer are simultaneously connected and disconnected, an isolating fracture is shared, and the space occupation and the equipment cost are reduced; the automation level of the isolating switch is improved through the first electric actuating mechanism; the isolation switch can be grounded through the functions of the second electric actuating mechanism and the grounding conductor, so that the safety of equipment and operators is ensured; the good conduction between the grounding conductor and the lightning arrester and the voltage transformer can be ensured through the mounting hole, the plum blossom contact piece, the spring contact piece II, the conductive spring and the mounting seat, and the conduction failure is avoided; the shielding cover is used for avoiding the phenomenon of point discharge, so that the reliability and the safety of the isolating switch are improved.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an on state according to an embodiment of the present utility model.

Fig. 2 is a schematic view of an off state according to an embodiment of the present utility model.

Fig. 3 is a schematic diagram of an assembly structure of an embodiment of the present utility model with a lightning arrester and a voltage transformer.

In the figure, 1, an electric actuator I, 2, a connecting flange I, 3, a transition contact, 4, a basin-shaped insulator I, 5, an electric actuator II, 6, a spring contact I, 7, a fixed contact, 8, a spring contact, 9, an installation seat, 10, a shielding cover, 11, a conductive spring, 12, a connecting conductor, 14, a shell, 15, a connecting flange IV, 16, a connecting flange III, 17, a voltage transformer, 18, a lightning arrester, 19, a moving contact, 20, an insulating pull rod, 21, a grounding conductor, 22 and a basin-shaped insulator II.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.

As shown in fig. 1 to 3, the present embodiment provides an isolating switch shared by a voltage transformer and a lightning arrester, which comprises a shell 14, a transition contact 3, a fixed contact 7 and a connecting conductor 12; the upper part of the shell 14 is provided with a first connecting flange 2, the first connecting flange 2 is used for being connected with a main body of the high-voltage combined electrical apparatus, a first basin-type insulator 4 is arranged between the first connecting flange 2 and the main body of the high-voltage combined electrical apparatus, a first conductive core 4 is arranged at the protruding part of the first basin-type insulator, one end of the first conductive core is in contact with a transition contact 3, the other end of the first conductive core is used for being electrically connected with a main circuit of the high-voltage combined electrical apparatus, the transition contact 3 is positioned at the upper end inside the shell 14, one end of the transition contact 3 is electrically connected with the main circuit of the high-voltage combined electrical apparatus through the first basin-type insulator 4, the other end of the transition contact 3 can be electrically connected with a fixed contact 7 through a moving contact 19 inside the transition contact, the moving contact 19 can move up and down in the transition contact 3, the lower end of the moving contact 19 can be electrically connected with the upper end of the fixed contact 7, a spring contact piece 6 is arranged at the upper end of the fixed contact 7, in order to ensure good conduction, when the moving contact 19 moves down to an end position, a spring contact piece 6 can be tightly pressed, and in order to avoid the position of the tip contact 3, and the position of the tip contact 6 is exposed at the position of the spring contact 6; the static contact 7 is arranged at the lower end of the inner part of the shell 14, the static contact 7 is used for being respectively and electrically connected with the lightning arrester 18 and the voltage sensor, the lower end of the shell 14 is provided with a second connecting flange, the second connecting flange is used for being connected with the lightning arrester 18, a second basin-type insulator 22 is arranged between the second connecting flange and the lightning arrester 18, a second conductive core is arranged at the protruding part of the second basin-type insulator 22, one end of the second conductive core is contacted with the lower end of the static contact 7, the other end of the second conductive core is used for being electrically connected with the lightning arrester 18, a third connecting flange 16 is arranged at one side of the shell 14, the third connecting flange 16 is used for being connected with the voltage transformer 17, a third basin-type insulator protruding part is arranged between the third connecting flange 16 and the voltage transformer 17, one end of the third conductive core is contacted with the connecting conductor 12, the connecting conductor 12 is electrically connected with the static contact 7, and the other end of the third conductive core is used for being electrically connected with the voltage transformer 17; in order to improve the automation level, the driving assembly comprises an electric actuator 1 and an insulating pull rod 20 which are connected with each other, the electric actuator 1 is arranged at the upper end of the shell 14, the electric actuator 1 is electrically connected with a controller of the high-voltage combined electrical apparatus, the insulating pull rod 20 is connected with the upper end of the moving contact 19, and the electric actuator 1 can drive the moving contact 19 to move up and down in the transition contact 3.

As shown in fig. 2, burrs are inevitably generated in the processing and manufacturing process of parts, when the equipment is pressure-resistant, the burrs generate tip discharge, so that two conductors with intervals still conduct electricity, and electric shock hidden danger exists, in order to improve the safety of the isolating switch, a connecting flange IV 15 is arranged on one side of a shell 14 opposite to a connecting flange III 16, an electric actuator II 5 is arranged on the connecting flange IV 15, the electric actuator I1 is electrically connected with a controller of a high-voltage combined electrical appliance, the electric actuator II 5 can drive a grounding conductor 21 to move, the grounding conductor 21 can be electrically connected and disconnected with a static contact 7, and current still existing after the isolating switch is disconnected can be led to the ground through the grounding conductor 21, so that the electric shock hidden danger is eliminated; in order to ensure that the grounding conductor 21, the fixed contact 7 and the connecting conductor 12 can have good conductivity and improve the reliability, the circumference surface of the fixed contact 7 is provided with a mounting hole, the mounting hole penetrates through the fixed contact 7, one end in the mounting hole is provided with a spring contact II 8 so as to prevent the spring contact II 8 from generating tip discharge, the grounding conductor 21 can extend into the mounting hole and be in contact with the spring contact II 8 to realize conductivity, the other end of the mounting hole is provided with a mounting seat 9, the mounting seat 9 is in contact with the surface of the mounting hole, one end of the mounting seat opposite to the connecting conductor 12 is provided with a connecting hole, a conductive spring 11 is arranged in the connecting hole, the connecting conductor 12 is arranged in the connecting hole and is in contact with the conductive spring 11 to realize conductivity, one end of the mounting seat 9 in contact with the grounding conductor 21 is provided with a plum blossom contact piece, and the grounding conductor 21 can be in contact with the plum blossom contact piece to realize conductivity; in order to facilitate the installation of the installation seat 9, a boss is arranged on the circumferential surface of the fixed contact 7, the installation hole penetrates through the boss, the installation seat 9 is in a convex shape, the large end of the installation seat 9 is connected with the boss through a bolt, a shielding cover 10 is arranged on the boss through a bolt, and the shielding cover 10 covers the boss and the installation seat 9 in the boss

The isolating switch shared by the voltage transformer 17 and the lightning arrester 18 is used in the following process:

when the voltage withstand test or maintenance is carried out, and the electrical connection between the main loop and the lightning arrester 18 and the electrical connection between the main loop and the voltage transformer 17 are required to be cut off, the first electric actuator 1 is controlled to drive the moving contact 19 to move upwards until the moving contact is completely retracted into the transition contact 3, and the second electric actuator 5 is controlled to drive the grounding conductor 21 to move towards the mounting hole until the grounding conductor 21 is tightly pressed with the spring contact 8; when the electric connection between the main loop and the lightning arrester 18 and the voltage transformer 17 is required to be switched on, the first electric actuator 1 is controlled to drive the moving contact 19 to move downwards until the moving contact contacts with the fixed contact 7, and the second electric actuator 5 is controlled to drive the grounding conductor 21 to move back to the mounting hole until the moving contact does not contact with the fixed contact 7.

From the above detailed description, it can be seen that the present utility model has the following advantages:

1. through the synergistic effect of the driving component, the moving contact 19, the transition contact 3 and the fixed contact 7, an operator can control whether the transition contact 3 and the fixed contact 7 are electrified or not according to the needs, so that the main loop of the high-voltage combined electrical apparatus, the lightning arrester 18 and the voltage transformer 17 are simultaneously connected and disconnected, the sharing of one isolating switch is realized, and the space occupation and the equipment cost are reduced; the automation level of the isolating switch is improved through the first electric executing mechanism 1;

2. the isolation switch can be grounded through the functions of the second electric executing mechanism 5 and the grounding conductor 21, so that the safety of equipment and operators is ensured;

3. through the mounting holes, the plum blossom contact, the spring contact II 8, the conductive spring 11 and the mounting seat 9, good conductivity of the grounding conductor 21, the lightning arrester 18 and the voltage transformer 17 can be ensured, and conductivity failure is avoided;

4. the shield cover 10 prevents the phenomenon of tip discharge, and improves the reliability and safety of the use of the isolating switch.

The terms "upper," "lower," "outboard," "inboard," and the like in the description and in the claims of the utility model and in the above figures, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a isolator that voltage transformer and arrester shared, including casing (14), its characterized in that, inside transition contact (3) that is provided with of casing (14), the one end and the main loop electricity of high-voltage combined electrical apparatus of transition contact (3) are connected, the other end of transition contact (3) can be connected with static contact (7) through moving contact (19), moving contact (19) can reciprocate in transition contact (3), moving contact (19) upper end is connected with drive assembly, the lower extreme of moving contact (19) can be connected with static contact (7) electricity and break off, static contact (7) set up inside casing (14), static contact (7) are used for being connected with arrester (18) and voltage sensor electricity respectively.

2. The isolating switch shared by the voltage transformer and the lightning arrester according to claim 1, wherein the driving assembly comprises an electric actuator I (1) and an insulating pull rod (20) which are connected with each other, the electric actuator I (1) is arranged at the upper end of the shell (14), the electric actuator I (1) is electrically connected with a controller of the high-voltage combined electrical appliance, the insulating pull rod (20) is connected with the upper end of the moving contact (19), and the electric actuator I (1) can drive the moving contact (19) to move up and down in the transition contact (3).

3. The isolating switch shared by the voltage transformer and the lightning arrester as claimed in claim 2, wherein the upper end of the fixed contact (7) is provided with a first spring contact (6), and the moving contact (19) can press the first spring contact (6) when the moving contact (19) moves down to the end position.

4. The isolating switch shared by the voltage transformer and the lightning arrester according to claim 2, wherein the shell (14) is provided with a first connecting flange (2), the first connecting flange (2) is used for being connected with a main body of the high-voltage combined electrical appliance, a first basin-type insulator (4) is arranged between the first connecting flange (2) and the main body of the high-voltage combined electrical appliance, a protruding part of the first basin-type insulator (4) is provided with a first conductive core, one end of the first conductive core is in contact with the transition contact (3), and the other end of the first conductive core is used for being electrically connected with a main circuit of the high-voltage combined electrical appliance.

5. The isolating switch shared by the voltage transformer and the lightning arrester according to claim 4, wherein a second connecting flange is arranged at the lower end of the shell (14), the second connecting flange is used for being connected with the lightning arrester (18), a second basin-type insulator (22) is arranged between the second connecting flange and the lightning arrester (18), a second conductive core is arranged at the protruding part of the second basin-type insulator (22), one end of the second conductive core is contacted with the lower end of the fixed contact (7), and the other end of the second conductive core is used for being electrically connected with the lightning arrester.

6. The isolating switch shared by the voltage transformer and the lightning arrester according to claim 5, wherein a connecting flange III (16) is arranged on one side of the shell (14), the connecting flange III (16) is used for being connected with the voltage transformer (17), a basin-type insulator III is arranged between the connecting flange III (16) and the voltage transformer (17), a conductive core III is arranged on a protruding part of the basin-type insulator III, one end of the conductive core III is used for being electrically connected with the voltage transformer, the other end of the conductive core III is in contact with the connecting conductor (12), and the connecting conductor (12) is electrically connected with the fixed contact (7).

7. The isolating switch shared by the voltage transformer and the lightning arrester according to claim 6, wherein a connecting flange IV (15) is arranged on one side, opposite to the connecting flange III (16), of the shell (14), an electric actuator II (5) is arranged on the connecting flange IV (15), the electric actuator I is electrically connected with a controller of the high-voltage combined electrical appliance, the electric actuator II (5) can drive a grounding conductor (21) to move, and the grounding conductor (21) can be electrically connected with and disconnected from the fixed contact (7).

8. The isolating switch shared by the voltage transformer and the lightning arrester according to claim 7, wherein a mounting hole is formed in the fixed contact (7), the axis of the mounting hole is perpendicular to the axis of the fixed contact (7), the mounting hole penetrates through the fixed contact (7), a spring contact II (8) is arranged at one end of the mounting hole, a grounding conductor (21) can extend into the mounting hole and contact with the spring contact II (8), a mounting seat (9) is arranged at the other end of the mounting hole, a connecting hole is formed in one end of the mounting seat (9), a conductive spring (11) is arranged in the connecting hole, a connecting conductor (12) is arranged in the connecting hole and contacts with the conductive spring (11), a plum blossom contact is arranged at the other end of the mounting seat (9), and the grounding conductor (21) can contact with the plum blossom contact.

9. The isolating switch shared by the voltage transformer and the lightning arrester as claimed in claim 8, wherein a boss is arranged on the circumferential surface of the static contact (7), the mounting hole penetrates through the boss, the mounting seat (9) is in a convex shape, one end of the mounting seat (9) is connected with the boss through a bolt, a shielding cover (10) is arranged on the boss, and the boss and the mounting seat (9) are covered by the shielding cover (10).