GIS (Gas Insulated Switchgear) outgoing line sleeve

Abstract

The invention discloses a GIS outgoing line sleeve which comprises a head assembly, a conductive tube, an insulating core body, a hollow composite insulator, a middle flange and a tail assembly. The two ends of the conductive tube are electrically connected with the head assembly and the tail assembly respectively. The insulating core body sleeves the conductive tube, and one end of the insulating core body is connected with the tail component; the conductive tube and the insulating core body are sleeved with the hollow composite insulator, one end of the hollow composite insulator is connected with the head assembly, the other end of the hollow composite insulator is connected with the middle flange, and the insulating core body is sleeved with the middle flange. According to the GIS outgoing line sleeve disclosed by the invention, the insulating core body is used as main insulation, so that the emission of greenhouse gases can be greatly reduced in the whole life cycle of production and use, and the environmental protection performance is better; according to the invention, the insulating core body is used as the main insulator, so that the wire outlet sleeve can be suitable for the temperature range of-60 DEG C to 120 DEG C, the applicable temperature range is wider, and the insulating property of the wire outlet sleeve is superior to that of the wire outlet sleeve taking SF6 gas as the main insulator in a low-temperature environment.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage insulation, and more particularly to a GIS outlet bushing. Background Art

[0002] As a key component of high-voltage switchgear (GIS, Gas Insulated Switchgear), the outlet bushing bears the important responsibility of connecting the power grid and the substation. It is known as the "lifeline" of the power system. Its technical level and quality are directly related to the stability and reliability of the power grid. For a long time, GIS outlet bushings have mainly relied on SF6 gas as an insulating medium to achieve the purpose of high-voltage insulation. However, with the increase of environmental awareness, the use of SF6, a highly effective greenhouse gas, has been increasingly restricted. Therefore, exploring green and environmentally friendly alternatives to GIS outlet bushings has become a technical problem that technicians in this field need to solve urgently. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a GIS outlet bushing to achieve an environmental protection solution for the GIS outlet bushing.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A GIS outlet bushing, comprising a head assembly, a conductive tube, an insulating core, a hollow composite insulator, a middle flange and a tail assembly;

[0006] Two ends of the conductive tube are electrically connected to the head component and the tail component respectively;

[0007] The insulating core is sleeved outside the conductive tube, and one end of the insulating core is connected to the tail assembly;

[0008] The hollow composite insulator is sleeved outside the conductive tube and the insulating core, and one end is connected to the head assembly, and the other end is connected to the middle flange, and the middle flange is sleeved outside the insulating core.

[0009] Optionally, in the above-mentioned GIS outlet bushing, the head assembly is threadedly connected to the conductive pipe.

[0010] Optionally, in the above-mentioned GIS outlet bushing, the head assembly includes an elastic assembly, a conductive sealing head and a first current-carrying strap;

[0011] The first current-carrying strap is disposed at one end of the conductive tube and is electrically connected to the conductive sealing head;

[0012] The conductive sealing head is connected to the elastic component;

[0013] The elastic component is connected to the hollow composite insulator and is threadedly connected to the conductive tube, and is used to push the conductive tube toward the direction where the conductive sealing head is located.

[0014] Optionally, in the above-mentioned GIS outlet bushing, the elastic component includes:

[0015] A mounting seat connected to the conductive sealing head and the hollow composite insulator;

[0016] A spring pressure plate is sleeved on the conductive tube and is threadedly connected with the conductive tube;

[0017] A connecting screw, the two ends of which are respectively connected to the mounting seat and the spring pressure plate;

[0018] The spring is sleeved on the connecting screw, and two ends of the spring are respectively in contact with the spring pressure plate and the mounting seat.

[0019] Optionally, in the above-mentioned GIS outlet bushing, the mounting seat is bolted to the hollow composite insulator;

[0020] The mounting seat is connected to the conductive sealing head via screws.

[0021] Optionally, in the above-mentioned GIS outlet bushing, the tail assembly includes:

[0022] A wiring terminal, wherein a second current-carrying strap is disposed at a first end of the wiring terminal, the second current-carrying strap is electrically connected to the conductive tube, and a third current-carrying strap is disposed at a second end of the wiring terminal, the third current-carrying strap is used to connect to the tube mother to carry current;

[0023] A base is connected to the wiring terminal and the insulating core.

[0024] Optionally, in the above-mentioned GIS outlet bushing, the wiring terminal is connected to the base by screws.

[0025] Optionally, in the above-mentioned GIS outlet bushing, the base is threadably connected to the insulating core.

[0026] Optionally, in the above-mentioned GIS outlet bushing, the middle flange is bolted to the hollow composite insulator.

[0027] Optionally, in the above-mentioned GIS outlet bushing, a boss structure is provided on the outer wall of the insulating core, and the middle flange is positioned and clamped with the insulating core through the boss structure.

[0028] The GIS outlet bushing provided by the present invention comprises a head assembly, a conductive tube, an insulating core, a hollow composite insulator, a middle flange and a tail assembly; the two ends of the conductive tube are electrically connected to the head assembly and the tail assembly respectively; the insulating core is sleeved outside the conductive tube, and one end is connected to the tail assembly; the hollow composite insulator is sleeved outside the conductive tube and the insulating core, and one end is connected to the head assembly and the other end is connected to the middle flange, and the middle flange is sleeved outside the insulating core.

[0029] Compared with the prior art, the GIS outlet bushing provided by the present invention uses an insulating core as the main insulation, which can greatly reduce the emission of greenhouse gases during the entire life cycle of production and use, and has better environmental protection performance than the outlet bushing using SF6 gas as the main insulation; the present invention uses an insulating core as the main insulation, which can be applied to a temperature range of -60°C to 120°C, has a wider applicable temperature range, and its insulation performance is better than that of the outlet bushing using SF6 gas as the main insulation in a low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the GIS outlet bushing disclosed in an embodiment of the present invention;

[0032] Figure 2 The local structure of the GIS outlet bushing disclosed in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0033] Figure 3 The local structure of the GIS outlet bushing disclosed in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0034] Figure 4 The local structure of the GIS outlet bushing disclosed in the embodiment of the present invention is shown in FIG. Figure 3 ;

[0035] Figure 5 It is a schematic diagram of the partial structure of the insulating core disclosed in an embodiment of the present invention.

[0036] Among them, 100 is a head assembly, 110 is a conductive sealing head, 120 is a first current-carrying strap, 130 is an elastic assembly, 131 is a connecting nut, 132 is a spring pressure plate, 133 is a connecting screw, 134 is a spring, 135 is a mounting seat, 200 is a conductive tube, 300 is a hollow composite insulator, 400 is an insulating core, 410 is an insulating medium, 420 is a capacitor screen, 430 is a rolled tube, 500 is a middle flange, 600 is a tail assembly, 610 is a base, 620 is a terminal block, 621 is a second current-carrying strap, and 622 is a third current-carrying strap. DETAILED DESCRIPTION

[0037] The core of the invention is to disclose a GIS outlet bushing to realize an environmental protection solution for the GIS outlet bushing.

[0038] The following embodiments are described with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the invention contents described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions to the inventions described in the claims. It should be noted that, for ease of description, only the parts related to the inventions are shown in the accompanying drawings. The embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0039] Combination Figure 1-Figure 5 The GIS outlet bushing disclosed in the present invention includes a head component 100, a conductive tube 200, an insulating core 400, a hollow composite insulator 300, a middle flange 500 and a tail component 600; the two ends of the conductive tube 200 are electrically connected to the head component 100 and the tail component 600 respectively; the insulating core 400 is sleeved outside the conductive tube 200, and one end is connected to the tail component 600; the hollow composite insulator 300 is sleeved outside the conductive tube 200 and the insulating core 400, and one end is connected to the head component 100, and the other end is connected to the middle flange 500, and the middle flange 500 is sleeved outside the insulating core 400.

[0040] Compared with the prior art, the GIS outlet bushing disclosed in the present invention uses the insulating core 400 as the main insulation, which can greatly reduce the emission of greenhouse gases during the entire life cycle of production and use, and has better environmental protection performance than the outlet bushing using SF6 gas as the main insulation; the present invention uses the insulating core 400 as the main insulation, which can be applied to the temperature range of -60°C to 120°C, has a wider applicable temperature range, and its insulation performance is better than the outlet bushing using SF6 gas as the main insulation in a low temperature environment.

[0041] The insulating core 400 includes an insulating medium 410, a capacitive screen 420 and a rolled tube 430 to form a capacitive voltage divider structure to achieve the insulation effect of the high potential to the ground potential. Exemplarily, the insulating medium 410 can be epoxy resin, ceramic material, polyimide film, polypropylene film, polyester film, etc. The specific structure and operation mechanism of the insulating core 400 are both existing technologies and will not be repeated here.

[0042] Specifically, the head assembly 100 and the conductive tube 200 may be threadedly connected.

[0043] In a specific embodiment disclosed in the present invention, the head assembly 100 includes an elastic assembly 130, a conductive sealing head 110 and a first current-carrying strap 120; the first current-carrying strap 120 is arranged at one end of the conductive tube 200 and is electrically connected to the conductive sealing head 110; the conductive sealing head 110 is connected to the elastic assembly 130; the elastic assembly 130 is connected to the hollow composite insulator 300 and is threadedly connected to the conductive tube 200, and is used to push the conductive tube 200 in the direction of the conductive sealing head 110, so that a reliable electrical connection is established between the conductive sealing head 110 and the conductive tube 200, thereby reducing the displacement caused by external loads and improving the system stiffness.

[0044] In one embodiment, in combination Figure 2 The elastic component 130 includes a mounting seat 135, a spring pressure plate 132, a connecting screw 133 and a spring 134. The mounting seat 135 is connected to the conductive sealing head 110 and the hollow composite insulator 300; the spring pressure plate 132 is sleeved on the conductive tube 200 and is threadedly connected to the conductive tube 200; the two ends of the connecting screw 133 are respectively connected to the mounting seat 135 and the spring pressure plate 132; the spring 134 is sleeved on the connecting screw 133, and the two ends are respectively abutted against the spring pressure plate 132 and the mounting seat 135, and can apply thrust to the spring pressure plate 132 through the mounting seat 135, thereby driving the conductive tube 200 to move in the direction of the conductive sealing head 110. Among them, the connecting screw 133 can be a double-headed screw, one end of which is threadedly connected to the mounting seat 135, and the other end is fixed to the spring pressure plate 132 through the connecting nut 131. The mounting seat 135 and the hollow composite insulator 300 may be connected by bolts, and the mounting seat 135 and the conductive sealing head 110 may be connected by screws.

[0045] In a specific embodiment disclosed in the present invention, Figure 4 The tail component 600 includes a terminal block 620 and a base 610. The first end of the terminal block 620 is provided with a second current-carrying strap 621, and the second current-carrying strap 621 is electrically connected to the conductive tube 200. The second end of the terminal block 620 is provided with a third current-carrying strap 622, and the third current-carrying strap 622 is used to connect to the mother tube to carry current; the base 610 is connected to the terminal block 620 and the insulating core 400.

[0046] Specifically, the connection terminal 620 and the base 610 can be connected by screws, and the base 610 and the insulating core 400 can be threadedly connected or connected by screws, which has a simple structure and is easy to install.

[0047] Combination Figure 3 In some embodiments, the middle flange 500 and the hollow composite insulator 300 are connected by bolts, which has a simple structure and is easy to install. Figure 3 The outer wall of the insulating core 400 is provided with a boss structure, and the middle flange 500 is positioned and connected with the insulating core 400 through the boss structure to ensure assembly accuracy. The middle flange 500 of the present invention is used to connect with the wall surface, so that the present invention can be used as an environmentally friendly wall bushing structure of a DC transmission system.

[0048] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. The specific technical means in some embodiments can be combined in part or in whole into another embodiment without being explicitly excluded by another embodiment. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A GIS outlet bushing, characterized in that: It comprises a head assembly (100), a conductive tube (200), an insulating core (400), a hollow composite insulator (300), a middle flange (500) and a tail assembly (600); Two ends of the conductive tube (200) are electrically connected to the head component (100) and the tail component (600) respectively; The insulating core (400) is sleeved outside the conductive tube (200), and one end of the insulating core is connected to the tail assembly (600); The hollow composite insulator (300) is sleeved outside the conductive tube (200) and the insulating core (400), and one end is connected to the head assembly (100), and the other end is connected to the middle flange (500), and the middle flange (500) is sleeved outside the insulating core (400).

2. The GIS outlet bushing according to claim 1, characterized in that: The head assembly (100) is threadedly connected to the conductive tube (200).

3. The GIS outlet bushing according to claim 2, characterized in that: The head assembly (100) comprises an elastic assembly (130), a conductive sealing head (110) and a first current-carrying strap (120); The first current-carrying strap (120) is arranged at one end of the conductive tube (200) and is electrically connected to the conductive sealing head (110); The conductive sealing head (110) is connected to the elastic component (130); The elastic component (130) is connected to the hollow composite insulator (300) and is threadedly connected to the conductive tube (200), and is used to push the conductive tube (200) in the direction where the conductive sealing head (110) is located.

4. The GIS outlet bushing according to claim 3, characterized in that: The elastic component (130) comprises: A mounting seat (135) connected to the conductive sealing head (110) and the hollow composite insulator (300); A spring pressure plate (132) is sleeved on the conductive tube (200) and is threadedly connected to the conductive tube (200); A connecting screw rod (133), wherein two ends of the connecting screw rod (133) are respectively connected to the mounting seat (135) and the spring pressure plate (132); The spring (134) is sleeved on the connecting screw (133), and two ends thereof are respectively in contact with the spring pressure plate (132) and the mounting seat (135).

5. The GIS outlet bushing according to claim 4, characterized in that: The mounting seat (135) is bolted to the hollow composite insulator (300); The mounting seat (135) is connected to the conductive sealing head (110) via screws.

6. The GIS outlet bushing according to claim 1, characterized in that: The tail assembly (600) comprises: A wiring terminal (620), wherein a first end of the wiring terminal (620) is provided with a second current-carrying strap (621), the second current-carrying strap (621) is electrically connected to the conductive tube (200), and a second end of the wiring terminal (620) is provided with a third current-carrying strap (622), the third current-carrying strap (622) is used to connect to a tube mother to carry current; A base (610), the base (610) being connected to the connection terminal (620) and the insulating core (400).

7. The GIS outlet bushing according to claim 6, characterized in that: The connection terminal (620) is connected to the base (610) via screws.

8. The GIS outlet bushing according to claim 6, characterized in that: The base (610) is threadably connected to the insulating core (400).

9. The GIS outlet bushing according to claim 1, characterized in that: The middle flange (500) is bolted to the hollow composite insulator (300).

10. The GIS outlet bushing according to claim 1, characterized in that: A boss structure is provided on the outer wall of the insulating core (400), and the middle flange (500) is positioned and clamped with the insulating core (400) via the boss structure.

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