CN210296247U

CN210296247U - Sealing structure suitable for outdoor 10kV SF6 circuit breaker

Info

Publication number: CN210296247U
Application number: CN201921411371.3U
Authority: CN
Inventors: 张志国; 柴新君; 安德宝
Original assignee: Shandong Taikai Power Switchgear Co ltd
Current assignee: Shandong Taikai Power Switchgear Co ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-04-10
Anticipated expiration: 2029-08-28

Abstract

The utility model relates to a power switching equipment technical field specifically is a be applicable to outdoor 10kV SF6 circuit breaker seal structure, including casing and the inside ring flange that is T type structure, the ring flange symmetry is installed in the both sides of casing, equal fixed connection insulator in the ring flange, and the equal suit main shaft of insulator 4, the both ends of main shaft are located the inside and outside both sides of casing respectively, and the symmetry is equipped with first sealing washer on the main shaft. The axial seal of first sealing washer and main shaft is realized through the deformation of first sealing washer horizontal part in this device to deformation through first sealing washer vertical part realizes that insulator and first sealing washer junction end face seal, thereby can the effectual leakproofness of guaranteeing the casing, and then prevents circuit breaker gas leakage, thereby prevents the personal injury and death and the loss of property that the circuit breaker explosion that causes because circuit breaker gas leakage caused.

Description

Sealing structure suitable for outdoor 10kV SF6 circuit breaker

Technical Field

The utility model belongs to the technical field of power switching equipment, specifically speaking is a be applicable to outdoor 10kV SF6 circuit breaker seal structure.

Background

In recent years, with the rapid development in the field of distribution networks, the 10kV SF6 gas column circuit breaker is recognized by domestic markets with the remarkable advantages of compact structure, large fracture distance, strong on-off capability, small volume, flexible configuration, convenient and fast installation and the like. In order to meet the performance requirement of the circuit breaker, SF6 gas with 0.35MPa of atmospheric pressure needs to be filled in the shell. Because the circuit breaker runs outdoors in a severe environment for a long time, the problems of insulation aging, sealing air leakage and the like become main reasons influencing normal operation. When the air leakage of the circuit breaker is low to a limit value, the on-off and on-off short-circuit faults of the circuit breaker can be influenced, the circuit breaker is exploded, and further inestimable loss is caused to personal safety and property safety.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be applicable to outdoor 10kV SF6 circuit breaker seal structure for solve the defect among the prior art.

The utility model discloses a following technical scheme realizes:

the utility model provides a be applicable to outdoor 10kV SF6 circuit breaker seal structure, including casing and the inside ring flange that is T type structure, the both sides at the casing are installed to the ring flange symmetry, equal fixed connection insulator in the ring flange, the equal suit main shaft of insulator, the both ends of main shaft are located the inside and outside both sides of casing respectively, the symmetry is equipped with first sealing washer on the main shaft, wherein be the T type inside and outside the first sealing washer shape, the vertical plane of first sealing washer all with the vertical inner wall contact cooperation of corresponding ring flange, the inner terminal surface of first sealing washer of overcoat respectively and insulator all with the inner wall contact cooperation of corresponding first sealing washer vertical section.

Preferably, the outer side surfaces of the flange plates are fixedly connected with the annular baffle plates, and the inner side surfaces of the annular baffle plates are fixedly connected with the outer end surfaces of the corresponding porcelain sleeves, so that the porcelain sleeves can be fixed in the flange plates.

Preferably, the annular baffle plate and the corresponding flange plate are fixedly connected through bolts.

Preferably, the specific connection mode of the flange and the shell is welding.

As the preferred, all be equipped with the packing ring between annular baffle and the bolt, the packing ring all overlaps on corresponding bolt to can effectually prevent that the bolt extrusion from destroying annular baffle.

Preferably, the shell has a circular structure, which can effectively prevent the shell from deforming under the action of internal air pressure.

Preferably, the main shaft is sleeved with second sealing rings, the second sealing rings are located on the inner sides of the corresponding first sealing rings, the second sealing rings move outwards under the action of pressure inside the shell, so that the second sealing rings are in close contact fit with the inner ends of the corresponding first sealing rings, a gap between the first sealing rings of the columns and the main shaft is sealed, gas in the shell is prevented from flowing out from the gap between the first sealing rings and the main shaft, and the air tightness of the shell is further guaranteed.

Preferably, the porcelain bushing is sleeved on the main shaft through an internal thread.

The utility model has the advantages that: in the device, the first sealing ring is tightly sleeved on the corresponding main shaft, and the vertical part of the first sealing ring is in close contact fit with the inner wall of the vertical part of the corresponding flange plate, so that the axial sealing of the main shaft is realized through the elastic deformation of the first sealing ring.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of the present invention; fig. 2 is an enlarged view of a portion I of fig. 1.

Shown in the figure:

1. the device comprises a shell, 2, a flange plate, 3, a porcelain bushing, 4, a main shaft, 5, a first sealing ring, 6, a second sealing ring, 7, an annular baffle, 8 and a bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

A sealing structure suitable for an outdoor 10kV SF6 circuit breaker is shown in the figure. The sealing device comprises a circular shell 1 with strong bearing capacity and flange plates 2 with T-shaped structures inside, wherein the flange plates 2 are symmetrically arranged at two sides of the shell 1 in a welding mode, the flange plates 2 are welded on the shell 1 and can effectively prevent the shell 1 and the flange plates 2 from leaking air, the flange plates 2 are fixedly connected with an annular baffle plate 7 through bolts 8, porcelain sleeves 3 are respectively clamped in the annular baffle plate 7, the porcelain sleeves 3 can effectively prevent the porcelain sleeves 3 from shaking, the flange plates 2 are fixedly connected with the annular baffle plate 7 through the bolts 8 so as to facilitate the disassembly and assembly of the annular baffle plate 7, the porcelain sleeves 3 are sleeved with a main shaft 4 through internal threads, two ends of the main shaft 4 are respectively positioned at the inner side and the outer side of the shell 1, first sealing rings 5 are symmetrically sleeved on the main shaft 4, wherein the inner side and the outer side of the shape of the first sealing rings 5 are T-shaped, and the, the longitudinal surfaces of the first sealing rings 5 are in contact fit with the longitudinal inner walls of the corresponding flange plates 2, the inner ends of the porcelain sleeves 3 are respectively sleeved with the first sealing rings 5 in an sleeved mode, and the inner end surfaces of the porcelain sleeves 3 are in contact fit with the inner walls of the vertical portions of the corresponding first sealing rings 5. In the device, the first sealing ring 5 is tightly sleeved on the corresponding main shaft 4, and the vertical part of the first sealing ring 5 is in close contact fit with the inner wall of the vertical part of the corresponding flange 2, so that the axial sealing of the main shaft 4 is realized through the elastic deformation of the first sealing ring 5, and the inner end of the porcelain sleeve 3 is inserted into the corresponding first sealing ring 5, and the inner end surface of the porcelain sleeve 3 is in contact fit with the inner wall of the vertical part of the corresponding first sealing ring 5, so that no gap exists between the porcelain sleeve 3 and the first sealing ring 5, and the end surface sealing of the joint of the porcelain sleeve 3 and the first sealing ring is ensured.

And a gasket is arranged between the bolt 8 and the annular baffle 7. Can effectively prevent bolt 8 and corresponding ring baffle 7 direct contact, and then can effectively prevent that bolt 8 from extrudeing and destroying corresponding ring baffle 7.

All the cover has second sealing washer 6 on main shaft 4, and second sealing washer 6 all is located the inboard of corresponding first sealing washer 5, and second sealing washer 6 outwards moves under the effect of 1 internal pressure in casing to with the inner in close contact with cooperation of corresponding first sealing washer 5, thereby seal the clearance on first sealing washer 5 of post and the main shaft 4, prevent that the interior gas of casing 1 from flowing from the clearance between first sealing washer 3 and the main shaft 4, and then guarantee the 1 gas tightness of casing.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a be applicable to outdoor 10kV SF6 circuit breaker seal structure which characterized in that: the sealing device comprises a shell (1), wherein a flange plate (2) with a T-shaped structure and a first sealing ring (5) with a T-shaped inner structure and a T-shaped outer structure are arranged inside the sealing device, the flange plate (2) is symmetrically arranged on two sides of the shell (1), a porcelain sleeve (3) is fixedly connected inside the flange plate (2), a main shaft (4) is sleeved on the porcelain sleeve (3), two ends of the main shaft (4) are respectively located on the inner side and the outer side of the shell (1), the vertical surface of the first sealing ring (5) is in contact fit with the vertical inner wall of the corresponding flange plate (2), the longitudinal surface of the first sealing ring (5) is in contact fit with the longitudinal inner wall of the corresponding flange plate (2), and the inner end of the porcelain sleeve (3) is respectively sleeved with the first sealing ring (5) and the inner end surface of the porcelain sleeve (3) is.

2. The sealing structure of claim 1, wherein the sealing structure is suitable for an outdoor 10kV SF6 breaker, and comprises: the outer side surfaces of the flange plates (2) are fixedly connected with annular baffle plates (7), and the inner side surfaces of the annular baffle plates (7) are fixedly connected with the outer end surfaces of the corresponding porcelain sleeves (3).

3. The sealing structure of claim 2, wherein the sealing structure is suitable for an outdoor 10kV SF6 breaker, and comprises: the annular baffle (7) and the corresponding flange plate (2) are fixedly connected through bolts (8).

4. The sealing structure of claim 1, wherein the sealing structure is suitable for an outdoor 10kV SF6 breaker, and comprises: the flange plate (2) and the shell (1) are welded in a specific connecting mode.

5. The sealing structure of claim 2, wherein the sealing structure is suitable for an outdoor 10kV SF6 breaker, and comprises: and gaskets are arranged between the annular baffle plates (7) and the bolts (8) and are sleeved on the corresponding bolts (8).

6. The sealing structure of claim 1, wherein the sealing structure is suitable for an outdoor 10kV SF6 breaker, and comprises: the shell (1) is of a circular structure.

7. The sealing structure of claim 1, wherein the sealing structure is suitable for an outdoor 10kV SF6 breaker, and comprises: the main shaft (4) is sleeved with a second sealing ring (6), and the second sealing ring (6) is located on the inner side of the corresponding first sealing ring (5).

8. The sealing structure of claim 1, wherein the sealing structure is suitable for an outdoor 10kV SF6 breaker, and comprises: the porcelain bushing (3) is sleeved with the main shaft (4) through the internal thread.