CN212343285U

CN212343285U - Sliding adjustable three-phase common-bin metal-enclosed power transmission line structure of star insulator

Info

Publication number: CN212343285U
Application number: CN202021170749.8U
Authority: CN
Inventors: 董月梅; 胡伊兵
Original assignee: Tianjin Shangsheng Technology Co Ltd
Current assignee: Tianjin Shangsheng Technology Co Ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-01-12
Anticipated expiration: 2030-06-22

Abstract

The utility model discloses a star type insulator slides adjustable three-phase and altogether storehouse metal enclosed transmission line structure, include the cross arm insulator that is the triangle-shaped installation in the confined transmission line barrel, the adjacent one end of cross arm insulator is all fixed mutually through the connecting plate, the cross arm insulator of barrel one side passes through fixed part with connecting plate and barrel fixed connection, the cross arm insulator of barrel opposite side is through rotating piece and barrel sliding fit, the passageway that is used for wearing to establish the conductor in the barrel is offered at cross arm insulator middle part, all be provided with the granule trapper between cross arm insulator and the barrel, the granule trapper that matches with slidable cross arm insulator all has the opening towards the barrel inner wall and with the fixed mounting groove mutually of connecting plate, the mounting groove that is located the top is used for setting up earthing device, the mounting groove that is located bottom both sides is used for setting up and. The utility model aims at providing a sliding adjustment three-phase is insulation system of interval between storehouse structure altogether.

Description

Sliding adjustable three-phase common-bin metal-enclosed power transmission line structure of star insulator

Technical Field

The utility model relates to a transmission equipment field especially relates to a star type insulator slides adjustable three-phase and altogether storehouse metal enclosed transmission line structure.

Background

The three-phase common-bin GIL structure is mainly used in 252kV and below voltage classes, and a conductor is mainly supported by a supporting insulator or a basin-type insulator. In recent years, part of manufacturers have developed a three-phase common-cabin type three-support fixed structure, but the fixed structure IS only applied to a 6IS bus unit of a transformer substation and IS not applied to a long-distance GIL, the fixed support structure IS mainly welded on a shell through a connecting plate and IS only limited to a fixed three-support structure, and due to the influence of conductor deflection, the support distance IS generally less than 5m when two ends of the fixed support structure are supported by basin insulators, so that the length of a GIS and a GIL standard unit IS limited. Due to the limitation of the inner diameter of the cylinder body and the welding process, the fixed points are mostly distributed on the edge of the flange, and the fixed points cannot be arranged at any position of the cylinder body. This mode has increased the flange butt joint face and has increased the risk of gas leakage, and processing technology is loaded down with trivial details. As the GIS bus unit is generally smaller than 7.5 meters, a sliding type supporting structure is not needed, and the sliding type supporting structure is not designed and applied. The GIL long distance transmission characteristics determine the GIL cell length to reduce flange interface. GIL standard cells are typically larger than 12 meters, and existing fixed support structures are prone to increased air leakage risk due to the addition of flange interface surfaces. Therefore, there is a need for an insulation structure that can slide and adjust the distance between three-phase common-bin structures on the basis of an original fixed structure, so as to reduce the sealing surface of flange butt joint and reduce the risk of air leakage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome not enough among the above-mentioned prior art, aim at providing one kind on original fixed knot constructs's basis, can carry out the insulating structure of interval between the sliding adjustment three-phase storehouse structure altogether, and then reduce the sealed face of flange butt joint, reduce the risk of leaking gas.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a star-shaped insulator sliding adjustable three-phase co-bin metal closed power transmission line structure comprises cross arm insulators which are installed in a closed power transmission line cylinder in a triangular mode, wherein the adjacent ends of the cross arm insulators are fixed through connecting plates, the cross arm insulators on one side of the cylinder fixedly connect the connecting plates with the cylinder through fixing parts, the cross arm insulators on the other side of the cylinder are in sliding fit with the cylinder through rotating pieces, channels for penetrating conductors in the cylinder are formed in the middle of the cross arm insulators, particle traps are arranged between the cross arm insulators and the cylinder, the particle traps matched with the slidable cross arm insulators are provided with mounting grooves, openings of the particle traps face the inner wall of the cylinder and are fixed with the connecting plates, the mounting grooves in the top are used for arranging grounding devices, and the mounting grooves in the two sides of the bottom are used for; the grounding device comprises a fixed sleeve sleeved in the mounting groove and a grounding contact electrode which is inserted in the fixed sleeve and is abutted against the cylinder, and a spring positioned between the grounding contact electrode and the mounting groove is arranged in the fixed sleeve in a penetrating manner; the particle catcher is made into a cylindrical structure by an aluminum plate, and the bottom of the particle catcher is provided with grid holes corresponding to the cross arm insulators.

Furthermore, the fixing part is composed of a limiting pad which is arranged on the connecting plate and is in tight fit with the cylinder body, and a fixing plate which fixes the particle catcher and the cylinder body.

Furthermore, the rotating part is composed of a ball in sliding fit with the cylinder body and a rolling shaft for supporting the ball in the mounting groove.

Furthermore, the fixing sleeve is made of organic materials.

Further, the ground contact is made of graphite or a graphite alloy.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses compare with current GIS benzvalene form insulator, this three-phase storehouse star type insulation support structure altogether can support longer conductor in a flexible way, sets up fixed cross arm insulator through one end in the barrel, and the mode that advances two to three slidable cross arm insulator according to conductor length again in the barrel increases standard cell's length to the accessible is adjusted the length that the slidable cross arm insulator changed standard cell. The mode reduces the number of the butt joint surfaces of the flanges, reduces the air leakage probability, and has great significance for reducing the cost of the long-distance transmission bus and increasing the productivity efficiency. And a particle catcher is added to each cross arm insulator combination, so that particles which can cause discharge near the cross arm insulator can be caught, an insulating surface is protected, and the probability of creeping discharge is reduced.

2. The utility model discloses for basin formula insulator, wear to locate the relative creepage distance between the conductor of cross arm insulator inner conductor and increased one time, the creepage route of interphase discharge must pass through the ground potential moreover, consequently preferentially discharges relatively, and the electric wire netting tripping operation avoids forming relative discharge between the conductor, reduces the electric wire netting risk.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the middle fixed cross arm insulator of the present invention;

FIG. 3 is a side view of the structure of FIG. 2;

fig. 4 is a schematic structural view of the slidable cross arm insulator of the present invention;

FIG. 5 is a side view of the structure of FIG. 4;

fig. 6is a schematic structural diagram of the grounding device of the present invention;

fig. 7 is a schematic structural view of a rotating member of the present invention;

fig. 8 is a schematic structural diagram of the discharge path of the present invention.

Description of reference numerals:

1-cylinder, 2-conductor, 3-particle catcher, 4-grounding device, 5-conductor relative discharge path, 6-conductor relative ground discharge path, 11-fixed part, 12-cross arm insulator, 13-rotating part, 31-mounting groove, 32-grid hole, 41-grounding contact, 42-spring, 43-fixing sleeve, 111-limiting pad, 112-fixed plate, 113-connecting plate, 131-ball and 132-rolling shaft.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 7, a star-shaped insulator sliding adjustable three-phase common-bin metal closed power transmission line structure comprises cross arm insulators 12 installed in a triangular shape in a closed power transmission line cylinder 1, wherein adjacent ends of the cross arm insulators 12 are fixed through a connecting plate 113, the cross arm insulators 12 on one side of the cylinder 1 fixedly connect the connecting plate 113 with the cylinder 1 through a fixing part 11, the cross arm insulators 12 on the other side of the cylinder 1 are in sliding fit with the cylinder 1 through a rotating part 13, a channel for penetrating a conductor 2 in the cylinder 1 is formed in the middle of each cross arm insulator 12, particle traps 3 are arranged between the cross arm insulators 12 and the cylinder 1, the particle traps 3 matched with the slidable cross arm insulators 12 are provided with mounting grooves 31 with openings facing the inner wall of the cylinder 1 and fixed with the connecting plate 113, the mounting grooves 31 on the top are used for arranging grounding devices 4, the mounting grooves 31 positioned at the two sides of the bottom are used for arranging the rotating piece 13; the grounding device 4 comprises a fixed sleeve 43 sleeved in the mounting groove 31 and a grounding contact electrode 41 inserted in the fixed sleeve 43 and abutted against the cylinder 1, and a spring 42 positioned between the grounding contact electrode 41 and the mounting groove 31 penetrates through the fixed sleeve 43; the particle catcher 3 is made into a cylindrical structure by an aluminum plate, and the bottom of the particle catcher is provided with a grid hole 32 corresponding to the cross arm insulator 12; the rotation member 13 is composed of a ball 131 slidably engaged with the cylinder 1 and a rolling shaft 132 supporting the ball 131 in the mounting groove 31.

The fixing part 111 is composed of a limiting pad 111 which is over tightly matched with the cylinder body 1 on a connecting plate 113, and a fixing plate 112 which fixes the particle catcher 3 and the cylinder body 1, the fixing plate 112 and the cylinder body 1 are fixed by welding, and the limiting pad 111 is tightly pressed with the cylinder body 1 by tight fit, so that the position of the cross arm insulator supporting structure is locked and fixed.

The fixing sleeve 43 is made of an organic material, and nylon or polytetrafluoroethylene can be used in the embodiment, so that the fixing sleeve 43 is in contact with metal to have a lubricating effect, and the cylinder body is prevented from being scratched in the moving process. The grounding contact 41 is made of graphite or graphite alloy, so that good electrical contact with the cylinder 1 is guaranteed, and meanwhile, the grounding contact has strong wear resistance and cannot generate fragments due to friction in the movement process.

The utility model provides a three-phase cross arm insulator bearing structure all adopts the three cross arm insulator 12 that separately pours, connects three cross arm insulator 12 fixed mutually through connecting plate 113, realizes stable, firm space conductor support mode. The cross arm insulator supporting structure forms a regular triangle structure, the conductor 2 is arranged in an inverted triangle form, the central conductor penetrates into the cross arm supporting structure, and the conductor 2 and each cross arm insulator 12 are fixed in a welding, crimping or riveting mode.

The fixed cross arm insulator and the sliding cross arm insulator supporting structure are assembled with the conductor 2 integrally and then are arranged in the cylinder body 1 for filling SF₆、N₂And SF₆The cross arm insulator 12 is also lighter and is convenient to transport and assemble. Aiming at the supporting structure of the sliding cross arm insulator, the top of the supporting structure is contacted with the cylinder body 1 through a grounding contact 41 tightly pressed with the cylinder body 1, and the spring 42 at the bottom of the grounding contact 41 is communicated with the particle catcher 3, so that the grounding contact 41, the spring 42, the cylinder body 1, the particle catcher 3 and four parts form an electrically communicated equivalent potential body, and the particle catcher 3 is ensured to be well grounded; the bottom part is in sliding fit with the cylinder body 1 through two rotating parts 13 consisting of rolling shafts 132 and rolling balls 131, so that the sliding cross arm insulator supporting structure can be displaced along with the expansion and contraction of the conductor 2, the moving resistance is reduced, the error in the installation process can be effectively compensated, and the thermal expansion or mechanical strain compensation is provided in the GIL operation process. The particle catcher 3 is added into the two supporting structures, metal particles can be collected by utilizing the Faraday cage principle, and the insulation reliability of the extra-high voltage GIL is improved. The grid holes 32 are formed in the bottom of the particle catcher 3, so that particles of different sizes and different materials can be guaranteed to be trapped in a shielding area between the particle catcher 3 and the barrel, the particles cannot escape after long-term operation, and insulation accidents caused by the particles can be effectively controlled.

Conductor relative discharge path 5 and conductor relative ground discharge path 6 as shown in fig. 8, the utility model discloses relative creepage distance between well conductor 2 is far greater than relative ground's straight-line distance, for present general three-phase common storehouse basin structure, has increased cross arm insulator 12 along surface creepage distance, has increased relative ground's dielectric strength. The relative creepage distance between the conductors 2 is twice of the relative earth distance of the conductors 2, so that the interphase discharge is effectively prevented, and the single-phase discharge is prevented from developing into the interphase discharge.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a star type insulator slides adjustable three-phase and altogether storehouse metal enclosed transmission line structure, includes the cross arm insulator that is the triangle-shaped installation in the confined transmission line barrel, its characterized in that: the device comprises a barrel, a cross arm insulator, a connecting plate, a rotating part, a channel, a particle catcher, a grounding device and a grounding device, wherein the adjacent ends of the cross arm insulators are fixed through the connecting plate, the cross arm insulator on one side of the barrel fixedly connects the connecting plate with the barrel through the fixing part, the cross arm insulator on the other side of the barrel is in sliding fit with the barrel through the rotating part, the middle part of the cross arm insulator is provided with the channel for penetrating a conductor in the barrel, the particle catcher is arranged between the cross arm insulator and the barrel, the particle catcher matched with the slidable cross arm insulator is provided with mounting grooves with openings facing the inner wall of the barrel and fixed with the connecting plate; the grounding device comprises a fixed sleeve sleeved in the mounting groove and a grounding contact electrode which is inserted in the fixed sleeve and is abutted against the cylinder, and a spring positioned between the grounding contact electrode and the mounting groove is arranged in the fixed sleeve in a penetrating manner; the particle catcher is made into a cylindrical structure by an aluminum plate, and the bottom of the particle catcher is provided with grid holes corresponding to the cross arm insulators.

2. The star insulator sliding adjustable three-phase common-bin metal closed power transmission line structure of claim 1, which is characterized in that: the fixing part consists of a limiting pad which is arranged on the connecting plate and is in tight fit with the cylinder body, and a fixing plate which fixes the particle catcher and the cylinder body.

3. The star insulator sliding adjustable three-phase common-bin metal closed power transmission line structure of claim 1, which is characterized in that: the rotating part is composed of a ball in sliding fit with the cylinder body and a rolling shaft for supporting the ball in the mounting groove.

4. The star insulator sliding adjustable three-phase common-bin metal closed power transmission line structure of claim 1, which is characterized in that: the fixing sleeve is made of organic materials.

5. The star insulator sliding adjustable three-phase common-bin metal closed power transmission line structure of claim 1, which is characterized in that: the ground contact is composed of graphite or a graphite alloy.