Transition interface for partially replacing welding type GIL (Gas Insulated Line) with flange type GIL

Abstract

The utility model discloses a transition interface for partially replacing a welding type GIL with a flange type GIL, which comprises an insulating shell with a tubular structure, and pipe orifices at two ends of the insulating shell are connected with first butt flanges; the side surface of the insulating shell is connected with a butt joint pipe of a tubular structure. A pipe opening of the butt joint pipe is connected with a second butt joint flange, and the butt joint pipe of the adjacent transition connector is connected through the second butt joint flange; the device solves the problem of complex construction caused by lack of a special transition interface at the turning position in the transformation process of changing a welding type GIL pipeline into a flange type GIL pipeline in the prior art, and has the characteristics that the flange type GIL pipeline can be quickly and vertically switched at the turning position, and the construction efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power system maintenance, and in particular relates to a transition interface in which a welding type GIL is partially replaced by a flange type GIL. Background Art

[0002] The 500kV GIL of a power station, i.e., a gas-insulated metal-enclosed transmission line, generally has multiple outgoing line loops distributed in multiple shafts. According to the layout position, each GIL can be divided into vertical sections in the upper and lower shafts and horizontal sections in the upper and lower horizontal tunnels and the outgoing line field. The vertical section is composed of a vertical standard welding module, and the horizontal section is composed of a horizontal standard welding module and a horizontal standard flange connection module. During the fault inspection and repair of the welding module GIL, due to its complex construction process, the fault inspection and repair cycle is long, causing losses to the electric field. In order to shorten the fault inspection and repair cycle of the welding module GIL, a method of partially replacing the welding type GIL with a flange type GIL is proposed for transformation. During the transformation and construction, the GIL pipelines of the horizontal section and the vertical section need to be connected through a vertical transfer joint when docking. Therefore, it is necessary to design a transition interface in which the welding type GIL is partially replaced by the flange type GIL to solve the above problems. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a transition interface for partially replacing a welded GIL with a flanged GIL. The device solves the problem that, during the transformation process of the GIL pipeline in the prior art from a welded type to a flanged type, a special transition interface is lacking at the turning point, resulting in complicated construction. The device has the characteristic of providing a fast vertical transfer at the turning point for the flanged GIL pipeline, thereby greatly improving the construction efficiency.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: the welding type GIL is partially replaced by a transition interface of the flange type GIL, including an insulating shell with a tubular structure, and the pipe openings at both ends of the insulating shell are connected with a first docking flange; the side surface of the insulating shell is connected with a docking pipe with a tubular structure; the pipe opening of the docking pipe is connected with a second docking flange, and is connected to the docking pipe of the adjacent transition interface through the second docking flange.

[0005] Preferably, a wire is connected inside the insulating shell, one end of the wire is vertically connected to a first wire connector, and the first wire connector faces the first docking flange.

[0006] Preferably, the other end of the wire is connected to a second wire connector, and the second wire connector faces the second docking flange.

[0007] Preferably, a pot-type insulator is provided at the pipe opening of the butt-joint pipe, and the pot-type insulator is connected to the second butt-joint flange of the butt-joint pipe.

[0008] Preferably, the concave side of the pot-type insulator is connected to the second conductor connector via a joint, and the convex side is connected to the second conductor connector of the adjacent transition interface via a joint.

[0009] Furthermore, the pot-type insulator may have a concave surface facing the inside of the butt-joint tube, or a convex surface facing the inside of the butt-joint tube.

[0010] Furthermore, during the docking process, the transition interface is flange-connected to the GIL pipeline in the same direction through the first docking flange, and the internal wires are also docked through the first wire joint.

[0011] Furthermore, during the docking process, the transition interface is docked with the GIL pipeline after vertical reversal through a docking tube, and another section of the vertical GIL pipeline is also connected to a transition interface at the docking point, which is flange-connected to the adjacent transition interface through a second docking flange and a basin-type insulator, thereby realizing the reversal of the GIL pipeline.

[0012] The beneficial effects of the transition interface of the welded GIL provided by the utility model being partially replaced by the flanged GIL are as follows:

[0013] This device can shorten the maintenance time from disassembly to replacement and commissioning when a single gas chamber fails, ensuring rapid response and rapid repair after a GIL failure, reducing power outage losses; it solves the problem of complex construction caused by the lack of a special transition interface at the turning point during the transformation of the GIL pipeline from a welded type to a flange type in the prior art, and has the characteristic of providing rapid vertical transfer at the turning point for the flange-type GIL pipeline, greatly improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a structural schematic diagram of the concave basin insulator of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the convex basin insulator of the utility model;

[0017] Figure 3 This is a schematic diagram of the specific implementation structure of replacing the horizontal section GIL of the utility model;

[0018] In the figure: an insulating housing 1, a first butt flange 2, a butt pipe 3, a second butt flange 4, a conductor 5, a first conductor joint 51, a second conductor joint 52, a pot insulator 6, and a GIL horizontal pipe section 7. DETAILED DESCRIPTION

[0019] like Figure 1~Figure 3In the figure, the welding type GIL is partially replaced by the transition interface of the flange type GIL, including an insulating shell 1 with a tubular structure, and the pipe ends of the insulating shell 1 are connected with a first docking flange 2; the side surface of the insulating shell 1 is connected with a docking pipe 3 with a tubular structure; the pipe end of the docking pipe 3 is connected with a second docking flange 4, and is connected to the docking pipe 3 of the adjacent transition interface through the second docking flange 4.

[0020] Preferably, a wire 5 is connected inside the insulating housing 1 , one end of the wire 5 is vertically connected to a first wire 5 connector, and the first wire 5 connector faces the first docking flange 2 .

[0021] Preferably, the other end of the wire 5 is connected to a second wire 5 connector, and the second wire 5 connector faces the second docking flange 4 .

[0022] Preferably, a pot-type insulator 6 is provided at the pipe opening of the butt-joint pipe 3 , and the pot-type insulator 6 is connected to the second butt-joint flange 4 of the butt-joint pipe 3 .

[0023] Preferably, the concave side of the pot insulator 6 is connected to the joint of the second conductor 5 through a joint, and the convex side is connected to the joint of the second conductor 5 of the adjacent transition interface through a joint.

[0024] Furthermore, the pot-type insulator 6 may have a concave surface facing the inside of the butt-joint tube 3 , or a convex surface facing the inside of the butt-joint tube 3 .

[0025] Furthermore, during the docking process, the transition interface is flange-connected with the GIL pipeline in the same direction through the first docking flange 2, and the internal conductor 5 is also docked through the first conductor 5 connector.

[0026] Furthermore, during the docking process, the transition interface is docked with the GIL pipeline after vertical reversal through the docking tube 3, and the docking point of another section of the vertical GIL pipeline is also connected with a transition interface, which is flange-connected to the adjacent transition interface through the second docking flange 4 and the basin insulator 6, thereby realizing the reversal of the GIL pipeline.

[0027] The working principle of the transition interface in which the above-mentioned welded GIL is partially replaced by a flanged GIL is as follows:

[0028] When in use, the transition interface is flange-connected with the GIL pipeline in the same direction through the first docking flange 2, the internal conductor 5 is also docked through the first conductor 5 joint, the transition interface is docked with the GIL pipeline after vertical reversal through the docking tube 3, and the other vertical GIL pipeline docking point is also connected with a transition interface, which is flange-connected with the adjacent transition interface through the second docking flange 4 and the basin insulator 6, so as to realize the reversal of the GIL pipeline.

[0029] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. The transition interface of the welded GIL is partially replaced by the flanged GIL, which is characterized by: The invention comprises an insulating shell (1) of a tubular structure, wherein the two end pipe openings of the insulating shell (1) are connected to first docking flanges (2); the side surface of the insulating shell (1) is connected to a docking pipe (3) of the tubular structure; the pipe opening of the docking pipe (3) is connected to a second docking flange (4), and the butt pipe of the adjacent transition interface is connected via the second docking flange (4).

2. The transition interface of the welded GIL partially replaced by the flanged GIL according to claim 1, characterized in that: A wire (5) is connected inside the insulating housing (1), one end of the wire (5) is vertically connected to a first wire connector (51), and the first wire connector (51) faces the first docking flange (2).

3. The transition interface of the welded GIL partially replaced by the flanged GIL according to claim 2, characterized in that: The other end of the wire (5) is connected to a second wire connector (52), and the second wire connector (52) faces the second docking flange (4).

4. The transition interface of the welded GIL partially replaced by the flanged GIL according to claim 1, characterized in that: A pot-type insulator (6) is provided at the pipe opening of the butt-joint pipe (3), and the pot-type insulator (6) is connected to the second butt-joint flange (4) of the butt-joint pipe (3).

5. The transition interface of the welded GIL partially replaced by the flanged GIL according to claim 4, characterized in that: The concave side of the pot-type insulator (6) is connected to the second conductor connector (52) via a connector, and the convex side is connected to the second conductor connector (52) of the adjacent transition interface via a connector.

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