CN209087547U - GIS Threephase common-box current transformer branch joint connects shell - Google Patents

Abstract

The utility model relates to a kind of GIS Threephase common-box current transformer branch joints to connect shell.Shell includes: main box, and current transformer switch-side connecting flange blocks cover board connecting flange, and outlet casing tube is fixedly connected with flange, firm banking, SF6 air inflation nozzle；Current transformer switch-side connecting flange uses outward flange structure, and sealing end cover board connecting flange uses inner flange structure；Outlet casing tube is fixedly connected with flange and is distributed in equilateral triangle, and intermediate connecting flange tilts outward, and the tilt angle of the connecting flange on both sides reduces inwardly；Outlet casing tube is fixedly connected with flange using outward flange structure；Firm banking and SF6 air inflation nozzle are separated from each other, and firm banking is located on the downside of shell, and air inflation nozzle is divided into two, is respectively symmetrically distributed in main box two sides.The utility model provides a kind of safe and reliable, good appearance, space-saving, cost economy current transformer branch joint connection shell, adapts to the miniaturization of smart grid switchgear, compact developing direction and technical need.

Description

GIS Threephase common-box current transformer branch joint connects shell

Technical field

The utility model relates to a kind of current transformer branch joints to connect shell, more particularly, to a kind of Threephase common-box Current transformer branch joint connect shell.

Background technique

GIS, which refers to, is connected to the individual components such as breaker, disconnecting switch, earthing switch, mutual inductor, arrester, bus Together, it and is encapsulated in the metal enclosed shell of ground connection, is collectively constituted with outlet casing tube, cable connecting arrangement, convergence control cabinet etc..Its Inside has the SF6 gas of excellent arc extinguishing and insulation performance filled with certain pressure.Since GIS is not only closed but also combined, therefore account for Ground area is small, and occupied space is few, and high reliablity, operation and maintenance amount are small, is not influenced by external environmental condition, does not generate and make an uproar The features such as sound, Electromagnetic Interference, no fire hazard, it has also become the preferred unit of city net substation and responsible consumer.

Current transformer plays the role of measuring main circuit current, is that the high current information in power grid is transmitted to low current Metering, measuring instrumentss and the relay protection of secondary side, automatic device a kind of special transformer, main function is: will once be The current information of system is accurately transfer to secondary side relevant device, and the high current of primary system is transformed to the small electricity of secondary side Stream makes the standardization of the devices such as measurement, measuring instrument and relay, miniaturization, and reduces the insulating requirements to secondary device, will Secondary side apparatus and electrical secondary system are isolated with primary system high-tension apparatus in electrical aspect well, to ensure that secondary set Standby and personal safety.It is a kind of involved in the utility model for Phase in One Tank Type GIS switchgear current transformer Branch joint connects shell, is mainly used for installing current shielding outlet casing tube.

As shown in Figure 1, 2, the structure chart of existing current transformer branch joint connection shell, existing shell is by main casing OT100, switch-side connecting flange OT101, closed end connecting flange OT102, outlet casing tube are fixedly connected with flange OT103~105, Firm banking OT106, SF6 air inflation nozzle OT107 composition.Its outlet casing tube is fixedly connected with flange OT103~105 using arranged in a straight line 120 ° of tilt profiles, increase the dimensional footprint of equipment, the mounting stability of Simultaneous Switching equipment is poor；Its firm banking Two different structure designs of OT106 and air inflation nozzle OT107 increase the manufacturing difficulty of shell, pacify simultaneously in a unit Dress maintenance and inflation operation are inconvenient.

Therefore, it is necessary to research and develop a kind of safe and reliable, good appearance, space-saving, cost economy current transformer point Branch casing connects shell, to adapt to the developing direction and technical need of the miniaturization of smart grid switchgear, compact.

Utility model content

The purpose of the utility model is to provide a kind of safe and reliable, good appearance, space-saving, cost economy, and meet The Threephase common-box current transformer branch joint that the miniaturization of smart grid switchgear, compact technology require connects shell.

To realize technical solution used by the utility model aim: GIS Threephase common-box current transformer branch joint Shell is connected, shell includes: main box (NT100), current transformer switch-side connecting flange (NT101), sealing end cover board connection Flange (NT102), outlet casing tube are fixedly connected flange (NT103~105), firm banking (NT106), SF6 air inflation nozzle (NT107 ~108)；

The current transformer switch-side connecting flange (NT101) uses outward flange structure, the sealing end cover board connection method Blue (NT102) uses inner flange structure；

The outlet casing tube is fixedly connected with flange (NT103~105) and is distributed in equilateral triangle, i.e. intermediate connecting flange (NT103) it tilts outward, the connecting flange (NT104) on both sides, the tilt angle of (NT105) reduce inwardly；

The outlet casing tube is fixedly connected with flange (NT103~105) using outward flange structure；

The firm banking (NT106) and SF6 air inflation nozzle (NT107~108) are separated from each other, the position firm banking (NT106) On the downside of shell (NT100), air inflation nozzle is divided into two (NT107), (NT108), is respectively symmetrically distributed in main box (NT100) two Side.

On the basis of existing current transformer branch joint connects shell, it is excellent to carry out structure design first for the utility model Change and improve, to overcome many drawbacks of existing shell.The structure of main casing uses the straight barrel type structure of existing shell, switch Side connecting flange uses existing outward flange structure, and closed end connecting flange then uses inner flange structure, to reduce shell body Product and improvement structural strength；3 outlet casing tubes are fixedly connected with flange and are distributed using equilateral triangle, i.e., intermediate connecting flange is outward Inclination, and the inclination angle of two sides connecting flange reduces inwardly, it, can be effective compared to the lineal layout structure of existing shell connecting flange Reduce dimensional footprint；3 outlet casing tubes are fixedly connected with flange and are designed using outward flange structure simultaneously, are substituted existing shell and are connected The inner flange structure of acting flange, to mitigate the weight of shell；Firm banking and air charging nozzle structure are separated from each other, and firm banking is independent Design is in housing base, and air charging nozzle structure designs two, and be placed in shell two sides, convenient existing to reduce manufacturing difficulty Field installation maintenance and charge operation.

The current transformer branch joint connection shell of the utility model is connect with existing current transformer branch joint Shell is compared and is mainly had the advantage that

1, the switch side flange in two end flanges of the main casing of this shell uses outward flange structure, and closes end flanges and adopt With inner flange structure, shell volume is reduced, SF6 air consumption is reduced, improves shell structure intensity, volume reduces 5%, SF6 air consumption reduce 5%, and structural strength improves 10%.

2, the outlet casing tube of this shell is fixedly connected with flange using equilateral triangle distribution and the design of outward flange structure, mitigates Case weight, the structural stability for reducing dimensional footprint, improving shell, case weight mitigate 5%, space hold Area reduces 25%.

3, the firm banking of this shell and air charging nozzle structure are separated from each other, and significantly reduce manufacturing difficulty, simultaneously It is easily installed maintenance and charge operation.

Detailed description of the invention

Fig. 1, Fig. 2 are the structural perspectives of existing current transformer branch joint connection shell.

Fig. 3, Fig. 4 are the structural perspectives of the current transformer branch joint connection shell of the utility model.

Fig. 5 is existing shell switch-side connecting flange, the local structural graph for blocking cover board connecting flange.

Fig. 6 is the utility model shell switch-side connecting flange, the local structural graph for blocking cover board connecting flange.

Fig. 7 is the local structural graph that existing shell outlet casing tube is fixedly connected with flange.

Fig. 8 is the local structural graph that the utility model shell outlet casing tube is fixedly connected with flange.

Fig. 9 is the local structural graph of existing shell firm banking and air inflation nozzle.

Figure 10 is the local structural graph of the utility model shell firm banking and air inflation nozzle.

Specific embodiment

It is described in further detail below in conjunction with shell of the attached drawing to the utility model.

As shown in Figure 3, Figure 4, the perspective view of the utility model shell.The primary structure of the utility model shell includes: master Cabinet NT100, current transformer switch the side (CT) connecting flange NT101, block cover board connecting flange NT102, and outlet casing tube is solid Determine connecting flange NT103~105, firm banking NT106, SF6 air inflation nozzle NT107~108.

Step 1:

As shown in Figure 5, Figure 6, the CT switch-side connecting flange NT101 of the utility model shell is used and existing shell The identical outward flange structure OT101 of OT100, and block outward flange knot of the cover board connecting flange NT102 then with existing shell OT100 Structure OT102 is different, using inner flange structure.The structure is beautiful and practical, keeps the appearance of shell more compact, structure is strong Du Genggao, volume, which reduces 5%, SF6 gas usage, reduces 5%, and intensity improves 10%.

Step 2:

As shown in Figure 7, Figure 8, the outlet casing tube of the utility model shell is fixedly connected with the distribution knot of flange NT103~105 Structure.Unlike the distributed architecture linear from existing shell connecting flange OT103~105, the utility model outlet casing tube is solid Determine connecting flange NT103~105 to be distributed in equilateral triangle.I.e. intermediate connecting flange NT103 is tilted outward, the connection on both sides The tilt angle of flange NT104, NT105 reduce inwardly.The design structure of the utility model effectively reduces mutual inductor outlet The installation space of casing, installation space reduce 25% or so.

The outlet casing tube of the utility model shell is fixedly connected with the structure of flange NT103~105.With existing shell connection method Using unlike inner flange structure, the utility model outlet casing tube is fixedly connected with flange NT103~105 and adopts blue OT103~105 It is outward flange structure.The structure is beautiful and practical, keep the appearance of shell more compact, weight saving 5% or so.

Step 3:

As shown in Figures 9 and 10, the structure of the firm banking of the utility model shell and air inflation nozzle.The fixation bottom of existing shell Together with seat OT106 is done with air inflation nozzle OT107 merging,.Firm banking and air inflation nozzle are separated from each other by the shell of the utility model, Firm banking NT106 is located on the downside of shell, and air inflation nozzle is divided into two NT107, NT108, is respectively symmetrically distributed in main casing two Side.Structure design, simplifies product structure, reduces manufacturing difficulty, while facilitating the on-site assembly work of shell, Especially air charging nozzle structure, can be different according to the installation environment of equipment, and selection is inflated in the convenient side in two sides.

Claims (1)

1.GIS Threephase common-box current transformer branch joint connects shell, which is characterized in that shell includes: main box (NT100), current transformer switch-side connecting flange (NT101) is blocked cover board connecting flange (NT102), and outlet casing tube is fixed Connecting flange (NT103~105), firm banking (NT106), SF6 air inflation nozzle (NT107~108)；

The current transformer switch-side connecting flange (NT101) uses outward flange structure, the sealing end cover board connecting flange (NT102) inner flange structure is used；

The outlet casing tube is fixedly connected with flange (NT103~105) and is distributed in equilateral triangle, i.e. intermediate connecting flange (NT103) it tilts outward, the connecting flange (NT104) on both sides, the tilt angle of (NT105) reduce inwardly；

The outlet casing tube is fixedly connected with flange (NT103~105) using outward flange structure；

The firm banking (NT106) and SF6 air inflation nozzle (NT107~108) are separated from each other, and firm banking (NT106) is located at shell On the downside of body (NT100), air inflation nozzle is divided into two (NT107), (NT108), is respectively symmetrically distributed in the two sides main box (NT100).