CN106058711A

CN106058711A - High-performance high-tension GIS (Gas Insulated Switchgear) shell

Info

Publication number: CN106058711A
Application number: CN201510160835.8A
Authority: CN
Inventors: 田江
Original assignee: Jiang Suhai Reaches Electric Applicance Co Ltd
Current assignee: Jiang Suhai Reaches Electric Applicance Co Ltd
Priority date: 2015-04-08
Filing date: 2015-04-08
Publication date: 2016-10-26

Abstract

The invention discloses a high-performance high-tension GIS (Gas Insulated Switchgear) shell, which comprises a cylinder and flanges arranged at two ends, and is characterized in that one end face of an inner hole of each flange is provided with a female end; an opening of each of end inner holes of the cylinder is provided with an inner groove; the female ends of the flanges sleeve the cylinder in a clearance fit manner and are fixedly connected with the cylinder by welding; the depth L1 of the female end is 0.9-1 times of the wall thickness of the cylinder; the upper end face of each female end is provided with a chamfer, the chamfer angle alpha is 45-55 degrees, and the depth L2 of the chamfer is 0.4-0.5 times of the wall thickness of the cylinder; the lower end face of each female end is provided with a chamfer, the chamfer angle beta is 35-40 degrees, and the depth L3 of the chamfer is 0.5-0.7 times of the wall thickness of the cylinder; the length L4 of a truncated edge of each inner groove is 0.2-0.3 times of the wall thickness of the cylinder; and the inner wall of the cylinder (2) is provided with an insulating coating. Further improvement lies in that a gap is reserved between each end face of the cylinder and the lower end face of the corresponding female end. The high-performance high-tension GIS shell is excellent in insulation performance, convenient for pre-welding cleaning, low in welding stress, small in welding deformation and small in secondly machining allowance of each flange.

Description

High-performance high pressure GIS Housing

Technical field

The present invention relates to high voltage substation field, particularly relate to a kind of GIS housing.

Background technology

High pressure GIS(Gas Insulated Switchgear Cubicle Gas-Insulated Switchgear) housing is the critical component of high-voltage combined electrical apparatus.There is following defect in existing high pressure GIS housing: one is the deburring of inner stopper upper surface, cylinder cannot clear up degree of depth impurity after assembling with inner stopper, and laterior horn weld seam is difficult to merge with weld joint on inner side during welding, cause housing weldquality low, easily produce pore, be mingled with, weld crack and the weld defect such as lack of penetration, have impact on the using effect of housing so that it is the life-span has a greatly reduced quality；Two are, cylinder and the groove docking mode of flange in the past, laterior horn weld seam is more than weld joint on inner side, the cross-direction shrinkage amount of laterior horn weld seam is more than interior weld joint on inner side, causing flange to produce eave tile deformation, in flange, outer face is big with tubular axis departure, needs to carry out secondary operations, allowance is bigger than normal, and the thickness became uneven after flange processing；Three is that the insulating properties in cylinder also need to improve further.

Summary of the invention

The present invention is directed to the deficiencies in the prior art, a kind of good insulation preformance is proposed, preweld cleaning can be easy to, significantly improve welding quality, substantially reduce the welding stress causing flange to produce eave tile deformation simultaneously, reduce outer face and the deviation of axis in flange, reduce the high-performance high pressure GIS housing of the surplus of flange secondary operations.

The present invention is achieved through the following technical solutions technical goal.

High-performance high pressure GIS housing, including cylinder, the flange at two ends；Described flange endoporus is provided with inner stopper in a side end face；The two ends bore orifice of described cylinder is provided with internal groove；Described flange inner stopper gap is sleeved on cylinder, is fixedly connected by welding；It thes improvement is that: described inner stopper degree of depth L1 is 0.9～1 times of cylinder wall thickness；Described inner stopper upper surface is provided with chamfering, and chamfer angle α is 45 °～55 °, and degree of depth L2 is 0.4～0.5 times of cylinder wall thickness；Described inner stopper lower surface is provided with chamfering, and chamfer angle beta is 35 °～40 °, and degree of depth L3 is 0.5～0.7 times of cylinder wall thickness；Described internal groove root face length L4 is 0.2～0.3 times of cylinder wall thickness；Described cylinder inboard wall is provided with insulating coating.

In said structure, gap is left in described body end surface and inner stopper lower surface, and this gap L 5 is 0.2～0.3 times of cylinder wall thickness.

The present invention compared with prior art, has the positive effect that:

1. flange inner stopper upper surface is provided with chamfering, it is simple to cleaning groove depth impurity, prevent pore, be mingled with, weld crack and the weld defect such as lack of penetration, significantly improve welding quality.

2. flange inner stopper upper surface is provided with chamfering, this groove docking mode inner and outer weld seam difference is little, medial and lateral welding cross-direction shrinkage amount can be balanced, substantially reduce the welding stress causing flange to produce eave tile deformation, reduce outer face and the deviation of axis in flange, reduce the surplus of flange secondary operations.

3. cylinder inboard wall is provided with insulating coating, can significantly improve the insulating properties of high pressure GIS housing.

4, gap is left in body end surface and inner stopper lower surface, reduce groove docking mode inner and outer weld seam difference further, reduce the welding stress causing flange to produce eave tile deformation further, reduce outer face and the deviation of axis in flange further, reduce the surplus of flange secondary operations further.

Fig. 1 is present configuration schematic diagram.

Fig. 2 is the enlarged diagram of I part in Fig. 1.

Detailed description of the invention

Below according to accompanying drawing and the invention will be further described in conjunction with the embodiments.

The GIS housing of high-performance high pressure shown in accompanying drawing, including cylinder 2, the flange 1 at two ends；Flange 1 endoporus is provided with inner stopper 1.1 in a side end face；The two ends bore orifice of cylinder 2 is provided with internal groove 2.1；Flange 1 inner stopper 1.1 gap is sleeved on cylinder 2, is fixedly connected by welding；Inner stopper 1.1 degree of depth L1 is 0.9～1 times of cylinder 2 wall thickness, and in the present embodiment, inner stopper 1.1 degree of depth L1 is 1 times of cylinder 2 wall thickness；Inner stopper 1.1 upper surface is provided with chamfering, and chamfer angle α is 45 °～55 °, and degree of depth L2 is 0.4～0.5 times of cylinder 2 wall thickness, and in the present embodiment, chamfer angle α is 45 °, and degree of depth L2 is 0.5 times of cylinder 2 wall thickness；Inner stopper 1.1 lower surface is provided with chamfering, and chamfer angle beta is 35 °～40 °, and degree of depth L3 is 0.5～0.7 times of cylinder 2 wall thickness, and in the present embodiment, chamfer angle beta is 35 °, and degree of depth L3 is 0.5 times of cylinder 2 wall thickness；Internal groove 2.1 root face length L4 is 0.2～0.3 times of cylinder 2 wall thickness, and in the present embodiment, internal groove 2.1 root face length L4 is 0.2 times of cylinder 2 wall thickness.

Cylinder 2 inwall is provided with insulating coating.

Gap is left in cylinder 2 end face and inner stopper 1.1 lower surface, and this gap L 5 is 0.2～0.3 times of cylinder 2 wall thickness, and in the present embodiment, this gap L 5 is 0.2 times of cylinder 2 wall thickness.

Claims

1. a high-performance high pressure GIS housing, including cylinder (2), the flange (1) at two ends；Described flange (1) endoporus is provided with inner stopper (1.1) in a side end face；The two ends bore orifice of described cylinder (2) is provided with internal groove (2.1)；Described flange (1) inner stopper (1.1) gap is sleeved on cylinder (2), is fixedly connected by welding；It is characterized in that:Described inner stopper (1.1) degree of depth L1 is 0.9～1 times of cylinder (2) wall thickness；Described inner stopper (1.1) upper surface is provided with chamfering, and chamfer angle α is 45 °～55 °, and degree of depth L2 is 0.4～0.5 times of cylinder (2) wall thickness；Described inner stopper (1.1) lower surface is provided with chamfering, and chamfer angle beta is 35 °～40 °, and degree of depth L3 is 0.5～0.7 times of cylinder (2) wall thickness；Described internal groove (2.1) root face length L4 is 0.2～0.3 times of cylinder (2) wall thickness；Described cylinder (2) inwall is provided with insulating coating.

High-performance high pressure GIS housing the most according to claim 1, it is characterised in that: gap is left in described cylinder (2) end face and inner stopper (1.1) lower surface, and this gap L 5 is 0.2～0.3 times of cylinder (2) wall thickness.