Device and method for adsorbing and cleaning metal foreign matters in GIS equipment

Abstract

The invention discloses a device and a method for adsorbing and cleaning metal foreign matters in GIS equipment, and the device comprises a tubular conductor clamp which is suitable for being detachably arranged on a GIS conductor of the GIS equipment in a sleeving manner, the outer peripheral surface of the conductor clamp is separated from the inner peripheral surface of a GIS shell of the GIS equipment; and the epoxy resin insulation covering film covers the outer peripheral surface of the conductor clamp and is constructed to be suitable for adsorbing the metal foreign matters on the epoxy resin insulation covering film when the GIS equipment is pressurized to reach the take-off voltage of the metal foreign matters. According to the embodiment of the invention, the adsorption cleaning device for the metal foreign matters in the GIS equipment has the advantages of manpower saving, high cleaning efficiency, short downtime, good cleaning effect and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage power transmission, and in particular to a device for adsorbing and cleaning metallic foreign matter inside a GIS device and a method for adsorbing and cleaning metallic foreign matter inside a GIS device. Background Art

[0002] During the manufacturing, transportation, installation and operation of GIS equipment (Gas-insulated Switchgear), metal foreign matter may be generated and accumulated due to factors such as poor internal cleaning, equipment vibration, and mechanical friction of contacts. Metal foreign matter in GIS will cause serious electric field distortion and form an uneven electric field near the foreign matter. When the foreign matter starts to move to a high field strength area or a weak insulation position, the insulation withstand strength of the GIS equipment will be significantly reduced, resulting in air gap breakdown or insulator flashover failure.

[0003] Metal foreign matter generated during the processing of GIS equipment is cleaned by high-pressure water gun flushing, ultrasonic cleaning, air gun blowing, etc. However, after the GIS equipment has been running for a long time, metal foreign matter will be generated and accumulated inside due to factors such as equipment vibration and contact friction.

[0004] In the related art, the only way to clean the metal foreign matter generated inside the GIS equipment during operation is to wipe it manually after the GIS equipment is shut down. Since most of the metal foreign matter inside the GIS equipment is in the form of dust, it is scattered on the shell and difficult to observe with the naked eye, making cleaning difficult. The cleaning process is time-consuming and labor-intensive, and the cleaning efficiency is low, resulting in long-term equipment shutdown. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a device for adsorbing and cleaning metal foreign matter inside GIS equipment, which has the advantages of saving manpower, high cleaning efficiency, short downtime, good cleaning effect, etc.

[0006] The invention also provides a method for adsorbing and cleaning metallic foreign matter inside GIS equipment.

[0007] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the present invention, a device for adsorbing and cleaning metal foreign matter inside GIS equipment is proposed, and the device for adsorbing and cleaning metal foreign matter inside GIS equipment comprises: a conductor clamp, which is tubular and suitable for being detachably mounted on a GIS conductor of a GIS device, and the outer peripheral surface of the conductor clamp is spaced apart from the inner peripheral surface of a GIS outer shell of the GIS device; and an epoxy resin insulating coating, which covers the outer peripheral surface of the conductor clamp and is constructed to be suitable for adsorbing metal foreign matter on the epoxy resin insulating coating when the GIS device is pressurized to reach the tripping voltage of the metal foreign matter.

[0008] The metal foreign matter adsorption and cleaning device inside the GIS equipment according to the embodiment of the present invention has the advantages of saving manpower, high cleaning efficiency, short downtime, good cleaning effect, etc.

[0009] In addition, the metal foreign matter adsorption and cleaning device inside GIS equipment according to the above embodiment of the present invention may also have the following additional technical features:

[0010] According to one embodiment of the present invention, the epoxy resin insulation coating is an epoxy marlin orange primer coating.

[0011] According to one embodiment of the present invention, the inner circumference of the conductor clamp is suitable for closely fitting with the outer circumference of the GIS conductor.

[0012] According to one embodiment of the present invention, the device for adsorbing and cleaning metal foreign matter inside the GIS equipment also includes a conductor hanging ring, which is arranged on the inner circumference of the conductor clamp, and the inner circumference of the conductor hanging ring is suitable for tightly fitting with the outer circumference of the GIS conductor.

[0013] According to one embodiment of the present invention, the conductor hanging rings are in plurality and are spaced apart along the axial direction of the conductor clamp.

[0014] According to one embodiment of the present invention, the conductor clamp is provided with a pair of through holes, and the conductor clamp is suitable for being detachably mounted on the GIS conductor by means of threaded fasteners engaged in the pair of through holes.

[0015] According to an embodiment of the present invention, the conductor fixture is a metal material piece.

[0016] According to an embodiment of the present invention, the inner circumference of the conductor fixture is polished.

[0017] According to an embodiment of the present invention, the end surface of the conductor fixture is rounded.

[0018] According to an embodiment of the second aspect of the present invention, a method for adsorbing and cleaning metal foreign matter inside a GIS device is provided. The method for adsorbing and cleaning metal foreign matter inside a GIS device adopts the device for adsorbing and cleaning metal foreign matter inside a GIS device according to the embodiment of the first aspect of the present invention, and comprises the following steps:

[0019] Installing the metal foreign matter adsorption and cleaning device inside the GIS equipment on the GIS conductor of the GIS equipment;

[0020] Pressurizing the GIS device until the trip voltage of the metal foreign matter is reached, so that the metal foreign matter is adsorbed on the epoxy resin insulation coating;

[0021] After the pressure is reduced, the metal foreign matter adsorption and cleaning device inside the GIS equipment is removed from the GIS conductor.

[0022] The method for adsorbing and cleaning metal foreign matter inside GIS equipment according to the embodiment of the present invention, by utilizing the device for adsorbing and cleaning metal foreign matter inside GIS equipment according to the embodiment of the first aspect of the present invention, has the advantages of saving manpower, high cleaning efficiency, short downtime, good cleaning effect, etc.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 It is a structural schematic diagram of a device for adsorbing and cleaning metallic foreign matter inside a GIS device and a GIS device according to an embodiment of the present invention.

[0026] Figure 2 It is a structural schematic diagram of a device for adsorbing and cleaning metallic foreign matter inside a GIS device and a GIS device according to an embodiment of the present invention.

[0027] Figure 3 It is a partial cross-sectional view of a device for adsorbing and cleaning metallic foreign matter inside a GIS device and a GIS device according to an embodiment of the present invention.

[0028] Figure 4 It is a cross-sectional view of a device for adsorbing and cleaning metallic foreign matter inside GIS equipment according to an embodiment of the present invention.

[0029] Figure 5 The present invention is a flowchart of a method for adsorbing and cleaning metallic foreign matter inside GIS equipment according to an embodiment of the present invention.

[0030] Figure numerals: GIS equipment internal metal foreign matter adsorption and cleaning device 1, conductor clamp 10, through hole 11, conductor hanging ring 20, GIS conductor 2, GIS housing 3, pot insulator 4, equalizing ring 5. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The following describes a device 1 for adsorbing and cleaning metallic foreign matter inside GIS equipment according to an embodiment of the present invention with reference to the accompanying drawings.

[0035] like Figure 1-Figure 5 As shown, the metal foreign matter adsorption and cleaning device 1 inside the GIS equipment according to an embodiment of the present invention includes a conductor clamp 10 and an epoxy resin insulation coating.

[0036] The conductor clamp 10 is tubular and is suitable for being detachably mounted on the GIS conductor 2 of the GIS device. The outer circumference of the conductor clamp 10 is spaced apart from the inner circumference of the GIS housing 3 of the GIS device. The epoxy resin insulation coating covers the outer circumference of the conductor clamp 10 and is configured to absorb metal foreign matter on the epoxy resin insulation coating when the GIS device is pressurized to reach the trip voltage of the metal foreign matter.

[0037] Specifically, the GIS device at least includes a GIS conductor 2, a GIS housing 3 and a pot-type insulator 4. The GIS conductor 2 is located in the GIS housing 3 and is separated from the GIS housing 3. The pot-type insulator 4 is connected to the same end of the GIS conductor 2 and the GIS housing 3. A grading ring 5 may also be provided between the GIS conductor 2 and the pot-type insulator 4.

[0038] This application is based on the inventor's discovery and understanding of the following facts and problems:

[0039] The inventors of the present application have found through extensive research that dust-like metal foreign matter is easily adsorbed on the insulating film after the pressure is increased to reach the trip voltage and the foreign matter trips, and the foreign matter will not fall off after the pressure is reduced.

[0040] First, the conductor clamp 10 is installed on the GIS conductor 2, and then the GIS equipment is slowly pressurized using a high-voltage power supply until the tripping field strength of the metal foreign matter is reached. After the metal foreign matter is tripped, it will be adsorbed on the epoxy resin insulation coating on the outer surface of the conductor clamp 10. After the pressure is reduced, the metal foreign matter adhering to the epoxy resin insulation coating will not fall off. Then, the metal foreign matter adsorption and cleaning device 1 inside the GIS equipment is removed from the GIS conductor 2, and the metal foreign matter is adsorbed on the epoxy resin insulation coating and taken out of the GIS equipment together, thereby achieving the cleaning of the metal foreign matter.

[0041] For example, the jumping field strength of dusty metal foreign matter is 0.56kV / mm. Taking 110KV single-phase GIS equipment as an example, the diameter of the GIS conductor 2 of the 110kV single-phase GIS equipment is 60mm, and the diameter of the GIS shell 3 is 248mm. The outer diameter of the metal foreign matter adsorption and cleaning device 1 inside the GIS equipment is 126mm. After installing the metal foreign matter adsorption and cleaning device 1 inside the GIS equipment, the GIS equipment is boosted to 58kV, so that the metal foreign matter is jumped and attached to the epoxy resin insulation film. After reducing the voltage, the conductor clamp 10 is disassembled, and the GIS equipment is taken out together with the metal foreign matter on the epoxy resin insulation film to achieve the cleaning of the metal foreign matter.

[0042] According to the device 1 for adsorbing and cleaning metal foreign matter inside GIS equipment of an embodiment of the present invention, by providing a conductor clamp 10 and providing an epoxy resin insulating coating on the outer peripheral surface of the conductor clamp 10, the conductor clamp 10 can be installed on the GIS conductor 2. In this way, after the GIS equipment is pressurized to reach the tripping voltage of the metal foreign matter, the metal foreign matter can be tripped and adsorbed on the epoxy resin insulating coating, thereby achieving the adsorption and collection of the metal foreign matter, which is convenient for centralized processing of the metal foreign matter.

[0043] Furthermore, by detachably arranging the conductor clamp 10 on the GIS conductor 2, the conductor clamp 10 can be removed from the GIS conductor 2 after the epoxy resin insulation film absorbs the metal foreign matter, so that the metal foreign matter leaves the GIS device, thereby achieving cleaning of the GIS device.

[0044] Therefore, compared with the manual wiping method adopted in the related art, the metal foreign matter adsorption and cleaning device 1 inside the GIS equipment can quickly adsorb the metal foreign matter inside the GIS equipment, and remove the metal foreign matter from the GIS equipment by disassembling the conductor clamp 10. It can not only save manpower, realize the rapid cleaning of metal foreign matter, improve the cleaning efficiency, reduce downtime, and make the cleaning process time-saving and labor-saving, but also does not need to observe the position of the metal foreign matter with the naked eye, and can avoid the problem of incomplete cleaning caused by not observing all the metal foreign matter during manual wiping, thereby reducing the cleaning difficulty and improving the cleaning effect of the metal foreign matter adsorption and cleaning device 1 inside the GIS equipment.

[0045] Therefore, the metal foreign matter adsorption and cleaning device 1 inside the GIS equipment according to the embodiment of the present invention has the advantages of saving manpower, high cleaning efficiency, short downtime, and good cleaning effect.

[0046] The following describes a device 1 for adsorbing and cleaning metallic foreign matter inside GIS equipment according to a specific embodiment of the present invention with reference to the accompanying drawings.

[0047] In some specific embodiments of the present invention, Figure 1-Figure 5 As shown, the metal foreign matter adsorption and cleaning device 1 inside the GIS equipment according to an embodiment of the present invention includes a conductor clamp 10 and an epoxy resin insulation coating.

[0048] Optionally, the epoxy resin insulation coating is an epoxy marlin orange primer coating. This can improve the adsorption effect of the metal foreign matter adsorption and cleaning device 1 inside the GIS equipment on the metal foreign matter.

[0049] In some embodiments, the inner circumference of the conductor clamp 10 is adapted to be closely fitted with the outer circumference of the GIS conductor 2. This can avoid the formation of a gap between the conductor clamp 10 and the GIS conductor 2, and improve the adsorption effect of the epoxy resin insulation film on metal foreign matter.

[0050] In other embodiments, Figure 3 and Figure 4 As shown, the GIS equipment internal metal foreign body adsorption and cleaning device 1 also includes a conductor hanging ring 20, which is arranged on the inner peripheral surface of the conductor clamp 10, and the inner peripheral surface of the conductor hanging ring 20 is suitable for tightly fitting with the outer peripheral surface of the GIS conductor 2. Since it is easier to ensure the processing accuracy by processing the conductor hanging ring 20 separately than by processing the conductor clamp 10, the provision of the conductor hanging ring 20 can facilitate the improvement of the position accuracy of the GIS equipment internal metal foreign body adsorption and cleaning device 1, avoid the formation of a gap between the conductor hanging ring 20 and the GIS conductor 2, and improve the adsorption effect of the GIS equipment internal metal foreign body adsorption and cleaning device 1 on metal foreign bodies.

[0051] Specifically, Figure 3 and Figure 4 As shown, there are multiple conductor hanging rings 20 and they are spaced apart along the axial direction of the conductor clamp 10. This can make the force on the conductor clamp 10 more uniform, further improve the position accuracy of the conductor clamp 10, and improve the adsorption effect of metal foreign matter.

[0052] In some embodiments, the conductor clamp 10 is provided with a pair of through holes 11, and the conductor clamp 10 is suitable for being detachably mounted on the GIS conductor 2 by means of threaded fasteners engaged in the pair of through holes 11. In this way, the detachable connection of the conductor clamp 10 can be achieved, and the stability of the conductor clamp 10 after installation can be improved.

[0053] In other embodiments, the conductor clamp 10 can also be positioned on the GIS conductor 2 by tightly fitting with the GIS conductor 2 .

[0054] Optionally, the conductor clamp 10 is made of metal material. This can make the conductor clamp 10 have good structural strength and conductivity, and facilitate the adsorption of metal foreign matter on the epoxy resin insulation coating. Specifically, the conductor hanging ring 20 is also made of metal material to ensure conductivity and structural strength.

[0055] Advantageously, the inner peripheral surface of the conductor fixture 10 is polished, which not only facilitates the matching of the conductor fixture 10 with the GIS conductor 2, but also avoids electric field concentration and improves the adsorption effect of the epoxy resin insulation film on metal foreign matter.

[0056] More advantageously, the end face of the conductor fixture 10 is rounded. Specifically, the edge of the conductor hanging ring 20 is also rounded. This can avoid electric field concentration and improve the adsorption effect of the epoxy resin insulation film on metal foreign matter.

[0057] Reference below Figure 5The method for cleaning metal foreign matter inside GIS equipment according to an embodiment of the present invention is described. The method for cleaning metal foreign matter inside GIS equipment according to an embodiment of the present invention adopts the device for cleaning metal foreign matter inside GIS equipment 1 according to the above embodiment of the present invention, and includes the following steps:

[0058] Installing the metal foreign matter adsorption and cleaning device inside the GIS equipment on the GIS conductor of the GIS equipment;

[0059] Pressurizing the GIS device until the trip voltage of the metal foreign matter is reached, so that the metal foreign matter is adsorbed on the epoxy resin insulation coating;

[0060] After the pressure is reduced, the metal foreign matter adsorption and cleaning device inside the GIS equipment is removed from the GIS conductor.

[0061] According to the method for adsorbing and cleaning metal foreign matter inside GIS equipment according to the embodiment of the present invention, by utilizing the device 1 for adsorbing and cleaning metal foreign matter inside GIS equipment according to the above-mentioned embodiment of the present invention, it has the advantages of saving manpower, high cleaning efficiency, short downtime, good cleaning effect, etc.

[0062] Other structures and operations of the device 1 and method for adsorbing and cleaning metallic foreign matter inside GIS equipment according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A device for adsorbing and cleaning metal foreign matter inside GIS equipment, characterized in that: include: A conductor clamp, wherein the conductor clamp is tubular and is suitable for being detachably sleeved on a GIS conductor of a GIS device, and an outer circumferential surface of the conductor clamp is spaced apart from an inner circumferential surface of a GIS housing of the GIS device; The epoxy resin insulation coating covers the outer peripheral surface of the conductor clamp and is configured to absorb metal foreign matter onto the epoxy resin insulation coating when the GIS equipment is pressurized to reach the tripping voltage of the metal foreign matter.

2. The metal foreign matter adsorption and cleaning device inside GIS equipment according to claim 1 is characterized in that: The epoxy resin insulation coating is epoxy marlin orange primer coating.

3. The metal foreign matter adsorption and cleaning device inside GIS equipment according to claim 1 is characterized in that: The inner circumference of the conductor clamp is suitable for tightly fitting with the outer circumference of the GIS conductor.

4. The device for adsorbing and cleaning metallic foreign matter inside GIS equipment according to claim 1, characterized in that: It also includes a conductor hanging ring, which is arranged on the inner circumference of the conductor clamp, and the inner circumference of the conductor hanging ring is suitable for tightly fitting with the outer circumference of the GIS conductor.

5. The device for adsorbing and cleaning metallic foreign matter inside GIS equipment according to claim 4, characterized in that: The conductor hanging rings are in plurality and are arranged at intervals along the axial direction of the conductor clamp.

6. The device for adsorbing and cleaning metallic foreign matter inside GIS equipment according to claim 1, characterized in that: The conductor clamp is provided with a pair of through holes, and the conductor clamp is suitable for being detachably mounted on the GIS conductor by means of threaded fasteners engaged in the pair of through holes.

7. The device for adsorbing and cleaning metallic foreign matter inside GIS equipment according to claim 1, characterized in that: The conductor fixture is made of metal material.

8. The device for adsorbing and cleaning metallic foreign matter inside GIS equipment according to claim 1, characterized in that: The inner peripheral surface of the conductor fixture is polished.

9. The device for adsorbing and cleaning metallic foreign matter inside GIS equipment according to claim 1, characterized in that: The end surface of the conductor fixture is rounded.

10. A method for cleaning metal foreign matter inside GIS equipment by adsorption, characterized in that: The device for adsorbing and cleaning metal foreign matter inside GIS equipment according to any one of claims 1 to 9 comprises the following steps: Installing the metal foreign matter adsorption and cleaning device inside the GIS equipment on the GIS conductor of the GIS equipment; Pressurizing the GIS device until the trip voltage of the metal foreign matter is reached, so that the metal foreign matter is adsorbed on the epoxy resin insulation coating; After the pressure is reduced, the metal foreign matter adsorption and cleaning device inside the GIS equipment is removed from the GIS conductor.

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