A GIS isolation grounding switch with side phase indication function

Abstract

The application discloses a GIS isolation grounding switch with side phase indication function, which comprises a shell, a grounding static contact, a main circuit static contact, a moving contact, a transmission insulating rod, an operating mechanism and a side phase indication assembly. Indicators are symmetrically provided with a working position identification part, an isolation position identification part and a grounding position identification part in the circumferential direction. The working position identification part is respectively provided with red ES combination and green DS split identification. The isolation position identification part is respectively provided with green ES split and green DS split identification. The grounding position identification part is respectively provided with green ES split and red DS combination identification. The front end wall of the anti-glare protective cover is provided with a transparent window. The working position identification part, the isolation position identification part and the grounding position identification part can be located behind the transparent window. The technical scheme of the application has the side phase position state visual indication function, and the open-close state of the side phase contact can be directly visually confirmed through the transparent window without relying on the indirect judgment of the electrical signal.

Description

Technical Field

[0001] This invention relates to the field of gas-insulated metal-enclosed switchgear (GIS) technology, and particularly to a 252kV GIS three-phase common-enclosure isolating grounding switch with phase indication function. Background Technology

[0002] In a 252kV GIS system, the isolating grounding switch is a key device for achieving circuit isolation. The accurate determination of its open and closed status is crucial for power grid maintenance, switching operations, and safe operation. However, current traditional isolating grounding switches typically rely on position signals from the operating mechanism (such as auxiliary contacts or microswitches) to indirectly feedback the opening and closing status. This presents several drawbacks: Firstly, existing isolating grounding switches have poor visibility of the side phases. GIS equipment uses a fully enclosed metal casing, allowing observation of the internal structure only through an observation window or partial transparent cover. For three-phase co-enclosure 252kV isolating grounding switches, the side phases (usually phase A or C) are difficult for maintenance personnel to visually confirm the contact positions due to casing obstruction or viewing angle limitations. Secondly, existing isolating grounding switches rely on indirect signals for the side phases, which carries risks such as signal transmission delays and false alarms due to contact aging, failing to meet the requirement for "seeing is believing" on-site operational confirmation. Thirdly, they lack adaptability to high-voltage environments. The high internal electric field strength of 252kV GIS makes conventional indicating devices (such as ordinary mechanical pointers or fluorescent markers) susceptible to electromagnetic interference or have insufficient insulation, affecting reliability.

[0003] Therefore, there is an urgent need for a structural design that is directly integrated into the body of the isolating grounding switch and has a visual indication function of the phase position status, so as to improve the safety of operation and maintenance and the reliability of operation. Summary of the Invention

[0004] The main objective of this invention is to propose a GIS isolation grounding switch with a phase indication function, which aims to solve the problem of poor phase visibility of existing isolation grounding switches mentioned in the background art. Through a mechanical indicating structure, it enables direct visual observation of the opening and closing status of the phase (A phase or C phase) contacts, while being compatible with three-phase co-enclosure GIS layouts and taking into account insulation performance and adaptability to high-voltage environments.

[0005] To achieve the above objectives, the present invention proposes a GIS isolation grounding switch with phase-side indication function, comprising a housing, a grounding stationary contact, a main circuit stationary contact, a moving contact, a transmission insulating rod, an operating mechanism, and a phase-side indication component. The grounding stationary contact and the main circuit stationary contact are respectively disposed on two side walls inside the housing. The transmission insulating rod is rotatably disposed within the housing. The operating mechanism is disposed at one end of the housing and connected to the transmission insulating rod. The moving contact is disposed on the transmission insulating rod and rotates with it. The two side walls of the moving contact are respectively electrically connected to the grounding stationary contact and the main circuit stationary contact. The moving contact performs opening and closing actions through the transmission insulating rod and the operating mechanism. The phase-side indication component is disposed on the front wall of the housing and includes an indicator element and an anti-glare protective cover. Both the indicator element and the anti-glare protective cover are arranged with an arc-shaped curved surface structure. The transmission insulating rod is detachably fixed and rotates with the transmission insulating rod. The anti-glare protective cover is detachably fixed to the side wall of the housing. The indicator is rotatably embedded in the anti-glare protective cover. The indicator is symmetrically provided with a working position marking part, an isolation position marking part, and a grounding position marking part in a double-layer fan-shaped structure along the circumferential direction. The inner and outer rings of the working position marking part are respectively provided with high-contrast red ES (Equal) and green DS (Disqual) markings. The inner and outer rings of the isolation position marking part are respectively provided with high-contrast green ES (Disqual) and green DS (Disqual) markings. The inner and outer rings of the grounding position marking part are respectively provided with high-contrast green ES (Disqual) and red DS (Equal) markings. The lower end of the front wall of the anti-glare protective cover is provided with a transparent window. The anti-glare protective cover is opaque except for the transparent window. The working position marking part, the isolation position marking part, and the grounding position marking part can be located behind the transparent window.

[0006] Optionally, when the operating mechanism drives the moving contact to contact the stationary contact of the main circuit, the main circuit is turned on. The working position marking part is located behind the transparent window. Through the transparent window, it can be clearly identified that the isolating grounding switch is in the working position state where the isolating switch main contact is closed and the grounding switch is open.

[0007] Optionally, when the operating mechanism drives the moving contact to contact the grounding stationary contact, the grounding circuit is connected, and the grounding position marking part is located behind the transparent window. Through the transparent window, it can be clearly identified that the isolating grounding switch is in the grounding position state where the main contact of the isolating switch is open and the grounding switch is closed.

[0008] Optionally, when the operating mechanism drives the moving contact to the middle position and neither of them contacts the main circuit stationary contact nor the grounding stationary contact, the isolation position marking part is located behind the transparent window. Through the transparent window, it can be clearly identified that the isolation grounding switch is in the isolation position state of the isolation switch open and the grounding switch open.

[0009] Optionally, the housing also includes a bearing housing, a bearing, a linkage shaft, and a sealing ring. The front end of the housing has a through hole, the bearing housing is embedded in the through hole, the bearing is disposed in the bearing housing, the linkage shaft is fixedly connected to the inner ring of the bearing, the sealing ring is disposed on the outer peripheral wall of the rear end of the linkage shaft, the sealing ring abuts against the inner peripheral wall of the bearing housing, the rear end of the linkage shaft is connected to the transmission insulating rod, the indicator is detachably fixedly connected to the front end of the linkage shaft, and the anti-glare protective cover is detachably fixedly connected to the front end wall of the bearing housing.

[0010] Optionally, the rear end of the indicator is provided with a first connecting rod, the front end of the linkage shaft is provided with a second connecting rod, the front end of the second connecting rod is provided with a limiting groove, and the rear end of the first connecting rod is provided with a limiting part that matches the limiting groove. The limiting part is detachably embedded in the limiting groove.

[0011] Optionally, it also includes a first fixing bolt, the front end of the indicator is provided with a first bolt hole that passes through the first connecting rod, the bottom of the limiting groove is provided with a first threaded hole, the first fixing bolt passes through the first bolt hole and is screwed into the first threaded hole.

[0012] Optionally, it also includes a fluororubber sealing gasket and a second fixing bolt. The rear end of the anti-glare protective cover is provided with a connecting plate along the circumferential direction. The fluororubber sealing gasket is disposed at the rear end of the connecting plate and abuts against the front end wall of the bearing seat. The connecting plate is provided with a plurality of second bolt holes along the circumferential direction. The front end wall of the bearing seat is provided with a plurality of second threaded holes. The second fixing bolt passes through the second bolt holes and is screwed into the second threaded holes.

[0013] Optionally, the transparent window is made of high-strength frosted acrylic material.

[0014] Optionally, the inner peripheral wall of the transparent window is provided with an anti-condensation coating, and the outer peripheral wall of the transparent window is provided with an anti-scratch coating.

[0015] The technical solution of this invention has the following beneficial effects: The technical solution of this invention achieves strict synchronization between the movement trajectory of the indicator and the opening and closing action of the moving contact through a reliable mechanical structure. Maintenance personnel can directly visually confirm the opening and closing status of the phase contact through the observation window, without relying on indirect judgment via electrical signals. This enables the isolating grounding switch to have a visual indication function for the phase position status, thereby improving maintenance safety and operational reliability. It solves the problems of traditional 252kV GIS isolating grounding switches where the phase position is not visible and relies on indirect signals for judgment. It has advantages such as intuitive reliability, high insulation, multi-environment adaptability, and three-phase consistency verification, thus improving the operational reliability and maintenance safety of the 252kV GIS isolating grounding switch. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a GIS isolation grounding switch with phase indication function according to an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of a GIS isolation grounding switch with phase indication function according to an embodiment of the present invention; Figure 3 This is a schematic diagram of another part of the structure of a GIS isolation grounding switch with phase indication function according to an embodiment of the present invention; Figure 4 This is a front view schematic diagram of an indicator element of a GIS isolation grounding switch with phase indication function according to an embodiment of the present invention; Figure 5 This is a cross-sectional structural schematic diagram of an indicator element for a GIS isolation grounding switch with phase indication function according to an embodiment of the present invention; Figure 6 This is a partially exploded structural diagram of a GIS isolation grounding switch with phase indication function according to an embodiment of the present invention; Figure 7 This is an exploded view of another part of the structure of a GIS isolation grounding switch with phase indication function according to an embodiment of the present invention.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] This invention proposes an isolating grounding switch for GIS with a phase indication function.

[0023] like Figures 1 to 7As shown, in one embodiment of the present invention, the GIS isolation grounding switch with phase indication function includes a housing 101, a grounding stationary contact 102, a main circuit stationary contact 103, a moving contact 104, a transmission insulating rod 105, an operating mechanism 106, and a phase indication assembly 200. The grounding stationary contact 102 and the main circuit stationary contact 103 are respectively disposed on the two side walls inside the housing 101. The transmission insulating rod 105 is rotatably disposed inside the housing 101. The operating mechanism 106 is disposed at one end of the housing 101. The operating mechanism 106 and the transmission insulating rod 105 are connected. The moving contacts 104 are respectively mounted on the transmission insulating rod 105 and rotate with the transmission insulating rod 105. The two side walls of the moving contacts 104 can respectively abut against the grounding stationary contact 102 and the main circuit stationary contact 103 for electrical connection. The moving contacts 104 realize the opening and closing action with the operating mechanism 106 through the transmission insulating rod 105. The phase indicator assembly 200 is mounted on the front wall of the housing 101. The phase indicator assembly 200 includes an indicator 201 and an anti-glare protective cover 202. Both the indicator 201 and the anti-glare protective cover 202 are arranged with an arc-shaped curved surface structure. 01 is detachably and fixedly connected to the transmission insulating rod 105 and rotates with the transmission insulating rod 105. The anti-glare protective cover 202 is detachably and fixedly connected to the side wall of the housing 101. The indicator 201 is rotatably embedded in the anti-glare protective cover 202. The indicator 201 is symmetrically provided with a double-layer fan-shaped structure of a working position marking part 2011, an isolation position marking part 2012, and a grounding position marking part 2013 along the circumferential direction. The inner and outer rings of the working position marking part 2011 are respectively provided with high-contrast red ES combination and green DS separation markings. The isolation position marking part 2013 is also provided with high-contrast red ES combination and green DS separation markings. The inner and outer rings of part 2012 are respectively provided with high-contrast green ES and green DS markings. The inner and outer rings of grounding position marking part 2013 are respectively provided with high-contrast green ES and red DS markings. The lower end of the front wall of the anti-glare protective cover 202 is provided with a transparent window 2021 (92% light transmittance). Except for the transparent window 2021, the anti-glare protective cover 202 is opaque. The working position marking part 2011, the isolation position marking part 2012 and the grounding position marking part 2013 can be located behind the transparent window 2021.

[0024] Specifically, when the operating mechanism 106 drives the moving contact 104 to contact the stationary contact 103 of the main circuit, the main circuit is turned on. The working position marking part 2011 is located behind the transparent window 2021. Through the transparent window 2021, it can be clearly identified that the isolating grounding switch is in the working position state where the main contact of the isolating switch is closed and the grounding switch is open.

[0025] Specifically, when the operating mechanism 106 drives the moving contact 104 to contact the grounding stationary contact 102, the grounding circuit is connected. The grounding position marking part 2013 is located behind the transparent window 2021. Through the transparent window 2021, it can be clearly identified that the isolating grounding switch is in the grounding position state where the main contact of the isolating switch is open and the grounding switch is closed.

[0026] Specifically, when the operating mechanism 106 drives the moving contact 104 to the middle position and neither of them is in contact with the main circuit stationary contact 103 and the grounding stationary contact 102, the isolation position marking part 2012 is located behind the transparent window. Through the transparent window 2021, it can be clearly identified that the isolation grounding switch is in the isolation position state of the isolation switch open and the grounding switch open.

[0027] Specifically, it also includes a bearing housing 203, a bearing 204, a linkage shaft 205, and a sealing ring 206. The front end of the housing 101 is provided with a through hole (not shown). The bearing 204 housing 103 is embedded in the through hole, and the bearing 204 is set in the bearing housing 203. The linkage shaft 205 is fixedly connected to the inner ring of the bearing 204. The sealing ring 206 is set on the outer peripheral wall of the rear end of the linkage shaft 205. The sealing ring 206 abuts against the inner peripheral wall of the bearing housing 203 to ensure the airtightness of the housing (annual leakage rate ≤0.1%). The rear end of the linkage shaft 205 is connected to the transmission insulating rod 105. The indicator 201 is detachably fixedly connected to the front end of the linkage shaft 205. The anti-glare protective cover 202 is detachably fixedly connected to the front end wall of the bearing 204 housing 103.

[0028] Specifically, the rear end of the indicator 201 is provided with a first connecting rod 2014, the front end of the linkage shaft 205 is provided with a second connecting rod 2051, the front end of the second connecting rod 2051 is provided with a limiting groove 2052, and the rear end of the first connecting rod 2014 is provided with a limiting part 2015 that is adapted to the limiting groove 2052. The limiting part 2015 is detachably embedded in the limiting groove 2052.

[0029] Specifically, it also includes a first fixing bolt 207. The front end of the indicator 201 is provided with a first bolt hole 2016 that passes through the first connecting rod. The bottom of the limiting groove 2052 is provided with a first threaded hole (not shown). The first fixing bolt 207 passes through the first bolt hole 2016 and is screwed into the first threaded hole, which facilitates the replacement of the label or maintenance during operation and maintenance.

[0030] Specifically, it also includes a fluororubber sealing gasket 208 and a second fixing bolt 209. The rear end of the anti-glare protective cover 202 is provided with a connecting plate 2023 along the circumferential direction. The fluororubber sealing gasket 208 is provided at the rear end of the connecting plate 2023 and abuts against the front end wall of the bearing seat 203 to ensure the IP65 protection performance of the housing. The connecting plate 2023 is provided with a plurality of second bolt holes 2022 along the circumferential direction. The front end wall of the bearing seat 203 is provided with a plurality of second threaded holes 2031. The second fixing bolt 209 passes through the second bolt holes 2022 and is screwed into the second threaded holes 2031.

[0031] Specifically, the transparent window 2021 is made of high-strength frosted acrylic material, which is resistant to ultraviolet aging and avoids interference from external light during observation.

[0032] Specifically, the inner peripheral wall of the transparent window 2021 is provided with an anti-condensation coating (not shown), and the outer peripheral wall of the transparent window 2021 is provided with an anti-scratch coating (not shown).

[0033] Specifically, this invention achieves strict synchronization between the movement trajectory of the indicator and the opening and closing action of the moving contact through a reliable mechanical structure. Maintenance personnel can directly visually confirm the opening and closing status of the phase contact through the observation window, without relying on indirect judgment via electrical signals. This enables the isolating grounding switch to have a visual indication function of the phase position status, thereby improving maintenance safety and operational reliability. It solves the problems of the traditional 252kV GIS isolating grounding switch having no visible phase position and relying on indirect signals for judgment. It has the advantages of being intuitive and reliable, having high insulation, adaptability to multiple environments, and three-phase consistency verification, thus improving the operational reliability and maintenance safety of the 252kV GIS isolating grounding switch.

[0034] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A GIS (Gas-Insulating System) isolation grounding switch with phase indication function, characterized in that, The device includes a housing, a grounding stationary contact, a main circuit stationary contact, a moving contact, a transmission insulating rod, an operating mechanism, and a phase-side indicator assembly. The grounding stationary contact and the main circuit stationary contact are respectively disposed on the two side walls inside the housing. The transmission insulating rod is rotatably disposed inside the housing. The operating mechanism is disposed at one end of the housing and connected to the transmission insulating rod. The moving contact is disposed on the transmission insulating rod and rotates with it. The two side walls of the moving contact can respectively abut against and electrically connect to the grounding stationary contact and the main circuit stationary contact. The moving contact performs opening and closing actions through the transmission insulating rod and the operating mechanism. The phase-side indicator assembly is disposed on the front wall of the housing and includes an indicator element and an anti-glare protective cover. Both the indicator element and the anti-glare protective cover have an arc-shaped curved surface structure. The indicator element is detachably fixedly connected to the transmission insulating rod and rotates with it. The transmission insulating rod rotates, and the anti-glare protective cover is detachably and fixedly connected to the side wall of the housing. The indicator is rotatably embedded in the anti-glare protective cover. The indicator is symmetrically arranged along the circumference with a double-layer fan-shaped structure of a working position marking part, an isolation position marking part, and a grounding position marking part. The inner and outer rings of the working position marking part are respectively provided with high-contrast red ES (Equal) and green DS (Disqual) markings. The inner and outer rings of the isolation position marking part are respectively provided with high-contrast green ES (Disqual) and green DS (Disqual) markings. The inner and outer rings of the grounding position marking part are respectively provided with high-contrast green ES (Disqual) and red DS (Equal) markings. The lower end of the front wall of the anti-glare protective cover is provided with a transparent window. The anti-glare protective cover is opaque except for the transparent window, and the working position marking part, the isolation position marking part, and the grounding position marking part can be located behind the transparent window.

2. The isolating grounding switch for GIS with phase indication function according to claim 1, characterized in that, When the operating mechanism drives the moving contact to contact the stationary contact of the main circuit, the main circuit is turned on. The working position marking part is located behind the transparent window. Through the transparent window, it can be clearly identified that the isolating grounding switch is in the working position state where the main contact of the isolating switch is closed and the grounding switch is open.

3. The isolating grounding switch for GIS with phase indication function according to claim 1, characterized in that, When the operating mechanism drives the moving contact to contact the grounding stationary contact, the grounding circuit is connected. The grounding position marking part is located behind the transparent window. Through the transparent window, it can be clearly identified that the isolating grounding switch is in the grounding position state where the main contact of the isolating switch is open and the grounding switch is closed.

4. The isolating grounding switch for GIS with phase indication function according to claim 1, characterized in that, When the operating mechanism drives the moving contact to the middle position, and neither of them is in contact with the main circuit stationary contact or the grounding stationary contact, the isolation position marking part is located behind the transparent window. Through the transparent window, it can be clearly identified that the isolation grounding switch is in the isolation position state of the isolation switch open and the grounding switch open.

5. The isolating grounding switch for GIS with phase indication function according to claim 1, characterized in that, It also includes a bearing housing, a bearing, a linkage shaft, and a sealing ring. The front end of the housing has a through hole, the bearing housing is embedded in the through hole, the bearing is disposed in the bearing housing, the linkage shaft is fixedly connected to the inner ring of the bearing, the sealing ring is disposed on the outer peripheral wall of the rear end of the linkage shaft, the sealing ring abuts against the inner peripheral wall of the bearing housing, the rear end of the linkage shaft is connected to the transmission insulating rod, the indicator is detachably fixedly connected to the front end of the linkage shaft, and the anti-glare protective cover is detachably fixedly connected to the front end wall of the bearing housing.

6. The isolating grounding switch for GIS with phase indication function according to claim 5, characterized in that, The rear end of the indicator is provided with a first connecting rod, the front end of the linkage shaft is provided with a second connecting rod, the front end of the second connecting rod is provided with a limiting groove, and the rear end of the first connecting rod is provided with a limiting part that matches the limiting groove. The limiting part is detachably embedded in the limiting groove.

7. The isolating grounding switch for GIS with phase indication function according to claim 6, characterized in that, It also includes a first fixing bolt, the front end of the indicator is provided with a first bolt hole that passes through the first connecting rod, the bottom of the limiting groove is provided with a first threaded hole, the first fixing bolt passes through the first bolt hole and is screwed into the first threaded hole.

8. The isolating grounding switch for GIS with phase indication function according to claim 5, characterized in that, It also includes a fluororubber sealing gasket and a second fixing bolt. The rear end of the anti-glare protective cover is provided with a connecting plate along the circumferential direction. The fluororubber sealing gasket is provided at the rear end of the connecting plate and abuts against the front end wall of the bearing seat. The connecting plate is provided with a plurality of second bolt holes along the circumferential direction. The front end wall of the bearing seat is provided with a plurality of second threaded holes. The second fixing bolt passes through the second bolt holes and is screwed into the second threaded holes.

9. The isolating grounding switch for GIS with phase indication function according to claim 1, characterized in that, The transparent window is made of high-strength frosted acrylic material.

10. The isolating grounding switch for GIS with phase indication function according to claim 1, characterized in that, The inner peripheral wall of the transparent window is provided with an anti-condensation coating, and the outer peripheral wall of the transparent window is provided with an anti-scratch coating.

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