SF6 circuit breaker shell with high sealing performance

Abstract

The utility model provides a high leakproofness SF6 breaker housing, comprising a housing, the left and right sides of the housing are fixedly connected with flange plates, the center of each flange plate is provided with a main shaft in a penetrating manner, the surface of the main shaft is sleeved with a sealing sleeve, the outer side of each flange plate is provided with an annular baffle plate, the outer side of the circle center of each annular baffle plate is fixedly connected with a porcelain bushing, and the porcelain bushing is provided with a sealing ring. A sealing ring is arranged at the joint of the annular baffle and the flange plate. Double sealing is formed through the sealing sleeve and the sealing ring, the sealing performance of the shell is improved, and then air leakage of the circuit breaker is prevented.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a high-sealing SF6 circuit breaker housing. Background Technology

[0002] A sulfur hexafluoride (SF6) circuit breaker is a high-voltage circuit breaker that uses sulfur hexafluoride (SF6) gas as an arc-extinguishing and insulating medium. When an electric arc occurs, SF6 gas is released into the arc area, utilizing its excellent insulating properties to rapidly cool the arc and inhibit its continuation, thus extinguishing the arc quickly. However, when SF6 gas encounters moisture or is used for arc extinguishing at high temperatures, it produces a highly corrosive and toxic gas. In the event of a severe leak, it can cause localized oxygen deficiency, posing a health risk to personnel on site. Summary of the Invention

[0003] To address the above problems, this utility model provides a high-sealing SF6 circuit breaker housing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a high-sealing SF6 circuit breaker housing, comprising a housing, flanges fixedly connected to both the left and right sides of the housing, a main shaft passing through the center of the flange, a sealing sleeve fitted on the surface of the main shaft, an annular baffle provided on the outer side of the flange, a porcelain sleeve fixedly connected to the outer side of the center of the annular baffle, and a sealing ring provided at the connection between the annular baffle and the flange.

[0005] Preferably, the sealing ring has a T-shaped cross-section, and a stop block is connected to the bottom inner side of the sealing ring. The stop block is triangular and is fixedly connected to the left side of the bottom end of the sealing ring. The side of the stop block connected to the sealing ring is longer than half the bottom side of the sealing ring.

[0006] Preferably, an embedded strip is fixedly connected to both the left and right sides of the inner side of the sealing ring, and the surface of the annular baffle and the surface of the flange are provided with an embedded groove that fits the embedded strip with a clearance.

[0007] Preferably, the outer side of the sealing sleeve contacts the inner side of the annular baffle, and the upper and lower sides of the inner side of the sealing sleeve are fixedly connected with the second embedding strip, and the inside of the housing is provided with the second embedding groove that is clearance-fitted with the second embedding strip.

[0008] Preferably, the outer side of the annular baffle is threaded with a positioning bolt, the inner end of the positioning bolt passes through the annular baffle and extends into the interior of the flange to be threadedly connected to the flange, and a washer is fitted on the surface of the positioning bolt.

[0009] Preferably, the shell and the flange are connected by welding.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses the cooperation of a shell, flange, annular baffle, porcelain sleeve, main shaft, sealing ring, and sealing sleeve. The sealing sleeve is tightly fitted onto the corresponding main shaft, and the vertical part of the sealing sleeve is in close contact with the inner wall of the vertical part of the corresponding flange. Therefore, the axial sealing of the main shaft is achieved through the elastic deformation of the sealing sleeve. The inner end face of the annular baffle is in contact with the inner wall of the vertical part of the sealing sleeve. A T-shaped sealing ring is provided at the connection between the flange and the annular baffle to block the gap between the flange and the annular baffle. The side length of the block connected to the sealing ring is more than half of the bottom edge of the sealing ring, so that the block is stuck on the inner wall of the flange. This can fix the sealing ring and also block the gap between the sealing ring and the flange and the annular baffle. The interlocking strip and the interlocking groove are used to prevent the outer side of the sealing ring from lifting up, improve the sealing effect of the sealing ring, prevent external dust from affecting the service life of the sealing ring, form a double seal, improve the sealing performance of the shell, and thus prevent the circuit breaker from leaking. Attached Figure Description

[0011] Figure 1 This is a partial sectional view of the main view of the casing of the high-sealing SF6 circuit breaker of this utility model.

[0012] Figure 2 This is an enlarged view of point A of the high-sealing SF6 circuit breaker housing of this utility model.

[0013] Figure descriptions: 1. Housing, 2. Flange, 3. Annular baffle, 31. Locating bolt, 32. Washer, 4. Ceramic sleeve, 5. Main shaft, 6. Sealing ring, 61. Embedded strip one, 62. Embedded groove one, 63. Stop block, 7. Sealing sleeve, 71. Embedded strip two, 72. Embedded groove two. Detailed Implementation

[0014] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0015] Please refer to the reference. Figure 1 and Figure 2 An embodiment of the present invention provides a high-sealing SF6 circuit breaker housing, comprising a housing 1, with flanges 2 fixedly connected to both the left and right sides of the housing 1, a main shaft 5 passing through the center of the flange 2, a sealing sleeve 7 fitted on the surface of the main shaft 5, an annular baffle 3 on the outer side of the flange 2, a porcelain sleeve 4 fixedly connected to the outer side of the center of the annular baffle 3, and a sealing ring 6 at the connection between the annular baffle 3 and the flange 2.

[0016] In one embodiment, such as Figure 2As shown, the sealing ring 6 has a T-shaped cross-section, blocking the gap between the flange 2 and the annular baffle 3. The bottom inner side of the sealing ring 6 is connected to a stop block 63, which is triangular and fixedly connected to the left side of the bottom of the sealing ring 6. The side of the stop block 63 connected to the sealing ring 6 is longer than half the bottom side of the sealing ring 6, so that the stop block 63 is stuck on the inner wall of the flange 2. This can fix the sealing ring 6 and also block the gap between the sealing ring 6, the flange 2, and the annular baffle 3.

[0017] In one embodiment, such as Figure 2 As shown, the left and right sides of the inner side of the sealing ring 6 are fixedly connected with the embedding strip 61. The surface of the annular baffle 3 and the surface of the flange 2 are provided with the embedding groove 62 that fits with the embedding strip 61. The embedding strip 61 and the embedding groove 62 fit together to prevent the outer side of the sealing ring 6 from lifting up, improve the sealing effect of the sealing ring 6, and prevent external dust from affecting the service life of the sealing ring 6.

[0018] In one embodiment, such as Figure 1 and Figure 2 As shown, the outer side of the sealing sleeve 7 contacts the inner side of the annular baffle 3, and the axial sealing of the main shaft 5 is achieved by the elastic deformation of the sealing sleeve 7. The upper and lower sides of the inner side of the sealing sleeve 7 are fixedly connected to the second embedded strip 71, and the housing 1 is provided with the second embedded groove 72 that is clearance-fitted with the second embedded strip 71.

[0019] In one embodiment, such as Figure 1 and Figure 2 As shown, the outer side of the annular baffle 3 is threaded with a positioning bolt 31, the inner end of the positioning bolt 31 passes through the annular baffle 3 and extends into the interior of the flange 2 and is threadedly connected to the flange 2, and a washer 32 is fitted on the surface of the positioning bolt 31.

[0020] In one embodiment, the housing 1 and the flange 2 are both connected by welding.

[0021] Usage: Combine Figures 1-2As shown, the sealing sleeve 7 is tightly fitted onto the corresponding main shaft 5, and the vertical part of the sealing sleeve 7 is in close contact with the inner wall of the vertical part of the corresponding flange 2. Therefore, the axial sealing of the main shaft 5 is achieved through the elastic deformation of the sealing sleeve 7. The inner end face of the annular baffle 3 is in contact with the inner wall of the vertical part of the sealing sleeve 7. A T-shaped sealing ring 6 is provided at the connection between the flange 2 and the annular baffle 3 to block the gap between the flange 2 and the annular baffle 3. The side length of the block 63 connected to the sealing ring 6 is more than half the bottom edge of the sealing ring 6, so that the block 63 is stuck on the inner wall of the flange 2. This can fix the sealing ring 6 and also block the gap between the sealing ring 6 and the flange 2 and the annular baffle 3. The insert strip 61 and the insert groove 62 are used in a gap fit to prevent the outer side of the sealing ring 6 from lifting up, improve the sealing effect of the sealing ring 6, prevent external dust from affecting the service life of the sealing ring 6, form a double seal, improve the sealing performance of the housing 1, and thus prevent the circuit breaker from leaking.

[0022] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A high-sealability SF6 circuit breaker housing, characterized by: The utility model relates to a shell (1) is provided with flange plate (2) on both sides, the main shaft (5) is arranged in the center of flange plate (2), the surface of main shaft (5) is provided with sealing sleeve (7), the outer side of flange plate (2) is provided with annular baffle (3), the outer side of the center of annular baffle (3) is provided with porcelain bushing (4), the connecting place of annular baffle (3) and flange plate (2) is provided with sealing ring (6), the cross section of sealing ring (6) is T type, the inner side bottom of sealing ring (6) is connected with stop block (63), stop block (63) is triangle, the left side of the bottom of sealing ring (6) is fixedly connected with stop block (63), the side length of stop block (63) and sealing ring (6) is longer than half of the bottom side of sealing ring (6), the outer side of sealing sleeve (7) and the inner side of annular baffle (3) are contacted, the upper side and the lower side of the inner side of sealing sleeve (7) are fixedly connected with embedded strip two (71), the inside of shell (1) is provided with embedded groove two (72) with the clearance cooperation of embedded strip two (71).

2. A high-seal SF6 circuit breaker housing as claimed in claim 1, characterized in that: The left side and the right side of the inner side of sealing ring (6) are fixedly connected with embedded strip one (61), the surface of annular baffle (3) and the surface of flange plate (2) are provided with embedded groove one (62) with the clearance cooperation of embedded strip one (61).

3. A high-seal SF6 circuit breaker housing as claimed in claim 1, characterized in that: The outer side of annular baffle (3) is threadedly connected with positioning bolt (31), the inner end of positioning bolt (31) penetrates annular baffle (3) and extends to the inside of flange plate (2) and is threadedly connected with flange plate (2), the surface of positioning bolt (31) is provided with washer (32).

4. A high-seal SF6 circuit breaker housing as claimed in claim 1, characterized in that: The specific connection mode of shell (1) and flange plate (2) is all welding.

Images