Vacuum arc-extinguishing chamber and end cover thereof

Abstract

The utility model provides a vacuum arc-extinguishing chamber and an end cover thereof, the end cover of the vacuum arc-extinguishing chamber comprises an annular main body, the annular main body is provided with an inner wall abutting ring, the inner wall abutting ring is provided with a plurality of elastic sheets capable of elastic deformation along the circumferential direction, and the elastic sheets are provided with positioning projections. During assembly, the positioning convex bracts on the elastic sheets abut against the inner wall of the porcelain shell to form effective positioning, so that the positioning precision is effectively improved; through the arrangement of the elastic piece, in the assembling process, assembling is completed through elastic deformation of the elastic piece, the situation that positioning protrusions are cut due to excessive extrusion is not likely to happen, and the possibility that parts are damaged and deformed in the assembling process can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of vacuum interrupter chambers, in particular to a vacuum interrupter chamber and an end cover thereof. Background Art

[0002] The vacuum interrupter, also known as the vacuum switch tube, is the core component of the vacuum switch, which basically determines the main performance of the vacuum switch. The existing vacuum interrupter generally includes a porcelain shell, a sealing ring, an end cover, a moving contact and a static contact; the end cover is assembled between the porcelain shell and the end cover, mainly for welding the transition sealing ring and the porcelain shell, reducing the stress of the welding and avoiding the porcelain shell from cracking due to welding stress. At the same time, positioning teeth are opened on the end cover for assembly positioning, which can effectively control the coaxiality of the product assembly. One of the assembly methods in the existing technology is to directly contact and position the end cover with the porcelain shell. However, the end cover is directly matched with the inner wall of the porcelain shell, and there is a small gap between the two due to the influence of dimensional accuracy, which is prone to offset and poor positioning accuracy. Utility Model Content

[0003] Therefore, in order to improve the above-mentioned problem of poor positioning accuracy, the present invention provides a vacuum interrupter and an end cover thereof.

[0004] To achieve the above purpose, the technical solutions provided by the present invention are as follows:

[0005] An end cover of a vacuum interrupter comprises an inner wall abutment ring. The inner wall abutment ring is provided with a plurality of elastically deformable elastic sheets along its circumferential direction. Positioning convex bulges are formed on the elastic sheets.

[0006] Furthermore, the elastic sheet is obtained by punching out the inner wall abutment ring.

[0007] Furthermore, the elastic sheet includes a connecting root connected to the inner wall abutting ring body and a bulge forming part connected to the connecting root. The two sides of the connecting root and the bulge forming part are spaced apart from the inner wall abutting ring body, and the positioning bulge is formed on the bulge forming part.

[0008] Furthermore, the width of the connecting root is smaller than that of the convex bud forming portion.

[0009] Furthermore, hollowed-out windows are formed between the two sides of the elastic sheet and the inner wall of the abutting ring body.

[0010] Furthermore, the width of the connecting root is smaller than the width of the clearance window between the side of the connecting root and the abutting ring body.

[0011] Furthermore, the width of the connecting root is 1.5 mm to 2.5 mm.

[0012] Furthermore, a plurality of elastic sheets are formed on the inner wall abutting ring; the plurality of elastic sheets are evenly distributed.

[0013] Furthermore, the end cover further comprises a sealing platform connected to an end of the inner wall abutting ring facing away from the elastic sheet.

[0014] A vacuum interrupter comprises a porcelain shell, a sealing ring and an end cover, wherein the end cover is assembled between the porcelain shell and the sealing ring; the end cover is the end cover of the vacuum interrupter described above; the end cover is abutted against the inner wall of the porcelain shell by positioning convex bumps formed on multiple elastic sheets to form a positioning assembly.

[0015] The technical solution provided by the utility model has the following beneficial effects:

[0016] 1. A plurality of elastic sheets are formed on the inner wall abutment ring along its circumferential direction, and positioning convex buds are formed on the elastic sheets. During assembly, the positioning convex buds on the elastic sheets abut against the inner wall of the porcelain shell to form effective positioning, thereby effectively improving the positioning accuracy. Due to the arrangement of the elastic sheets, the assembly is completed through the elastic deformation of the elastic sheets during the assembly process, and it is not easy to cause the cutting of the positioning convex buds due to excessive extrusion, thereby reducing the possibility of damage and deformation of the parts during assembly.

[0017] 2. Regarding the setting of the elastic sheet, the width of the connecting root is smaller than that of the convex bud forming portion to avoid the connecting root of the elastic sheet being too wide and causing poor deformation effect.

[0018] 3. Hollow windows are formed between the two sides of the elastic sheet and the inner wall of the abutment ring body; this can reduce the precision error of parts processing and shearing.

[0019] Through this design, the cost of this part can be reduced by more than 50%, and the product coaxiality qualification rate can reach up to 100%. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure shows a schematic diagram of the three-dimensional structure of the end shield of the vacuum interrupter in the embodiment;

[0021] Figure 2 Shown is a front view of the end shield of the vacuum interrupter in the embodiment;

[0022] Figure 3 Shown is a cross-sectional view of a vacuum interrupter in an embodiment;

[0023] Figure 4 Shown Figure 3 A magnified schematic diagram of area A in the middle. DETAILED DESCRIPTION

[0024] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0025] In the description of the present invention, terms such as "up", "down", "left", "right", "front", and "back" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0026] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0027] Reference Figure 1 、 Figure 2 As shown, the end cover of a vacuum arc chamber provided in this embodiment includes an inner wall abutment ring 13; wherein, the inner wall abutment ring 13 is formed with a plurality of elastically deformable elastic sheets 12 along its circumferential direction, that is, the inner wall abutment ring 13 includes a plurality of elastically deformable elastic sheets 12 and an inner wall abutment ring body 11 other than the elastic sheets 12; in this embodiment, the number of elastic sheets 12 is three, and a positioning bulge 123 is formed on the elastic sheet 12; specifically, the positioning bulge 123 protrudes outward (to the side away from the center point of the inner wall abutment ring 13).

[0028] Continue to refer to Figure 3 and Figure 4 As shown, this embodiment also provides a vacuum interrupter, comprising a porcelain shell 21, a sealing ring 22 and an end cover 10, wherein the end cover 10 is assembled between the porcelain shell 21 and the sealing ring 22; specifically, the end cover 10 is the end cover of the vacuum interrupter described above; the end cover 10 is abutted against the inner wall of the porcelain shell 21 by positioning convex buds 123 formed on a plurality of elastic sheets 12 to form a positioning assembly. That is, during assembly, the positioning convex buds 123 on the elastic sheet 12 abut against the inner wall of the porcelain shell 21 to form an effective positioning, thereby effectively improving the positioning accuracy; the setting of the elastic sheet 12, during the assembly process, completes the assembly through the elastic deformation of the elastic sheet 12, is not prone to excessive extrusion and cutting of the positioning convex buds 123, and can reduce the possibility of damage and deformation of the parts assembly.

[0029] Specifically, the upper and lower ends of the porcelain shell 21 are both equipped with sealing rings 22 and end covers 10 . The upper sealing ring 22 is used to assemble the moving contact 23 , and the lower sealing ring 22 is used to assemble the static contact 24 .

[0030] Specifically, in this embodiment, the three elastically deformable elastic sheets 12 are evenly distributed along the circumferential direction of the inner wall abutting ring 13, so that the force is uniform and the positioning support effect is better. Specifically, in other embodiments, the number of elastic sheets 12 can be set according to actual conditions.

[0031] Specifically, in this embodiment, the elastic sheet 12 is obtained by punching the inner wall abutment ring 13, which enables rapid production. Of course, in other embodiments, other methods can also be used, such as integrally casting the inner wall abutment ring 13 or assembling the elastic sheet 12 to the inner wall abutment ring body 11 by welding.

[0032] The elastic sheet 12 includes a connecting root 121 connected to the inner wall abutting ring body 11 and a bulge forming part 122 connected to the connecting root 121. The two sides of the connecting root 121 and the bulge forming part 122 are arranged at a distance from the inner wall abutting ring body 11, thereby realizing the deformable function of the elastic sheet 12. The positioning bulge 123 is formed on the bulge forming part 122.

[0033] The width of the connecting root 121 is smaller than that of the convex bulge forming portion 122. In this embodiment, the width of the connecting root 121 is 1.5 mm to 2.5 mm. Reducing the width of the connecting root 121 can prevent the connecting root 121 of the elastic piece 12 from being too wide and causing poor deformation effect.

[0034] The connecting root 121 and the sides of the convex bulge forming portion 122 are spaced apart from the inner wall abutting ring body 11, specifically forming a hollowed-out clearance window 15. This creates a larger spacing between the sides of the elastic sheet 12 and the inner wall abutting ring body 11, thereby reducing precision errors in part processing and shearing. Furthermore, when the elastic sheet 12 is squeezed and deformed inward, its sidewalls are less likely to contact and interfere with the inner wall abutting ring body 11. Furthermore, the width of the connecting root 121 is smaller than the width of the clearance window 15 between the side edge of the connecting root 121 and the abutting ring body 11.

[0035] Furthermore, in this embodiment, the end cover 10 further includes a sealing platform 14, and the sealing platform 14 is connected to the end of the inner wall abutting ring 13 away from the elastic sheet 12; Figure 4 As shown, the sealing platform 14 is bent outward and disposed between the ceramic shell 21 and the sealing ring 22 , and is used for transition welding of the sealing ring 22 and the ceramic shell 21 , thereby reducing welding stress and preventing the ceramic shell 21 from cracking due to welding stress.

[0036] The structural design of the end shield 10 of this solution can not only meet the requirements of sufficient elastic deformation to form an effective positioning function, but also achieve a miniaturized design of parts, which is more conducive to cost control.

[0037] Through this design, the cost of this part can be reduced by more than 50%, and the product coaxiality qualification rate can reach up to 100%.

[0038] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes can be made to the form and details of the present invention without departing from the spirit and scope of the present invention as defined by the appended claims, and all of these changes are within the scope of protection of the present invention.

Claims

1. An end shield of a vacuum interrupter, comprising an inner wall abutment ring, characterized in that: The inner wall abutting ring is formed with a plurality of elastically deformable elastic sheets along its circumferential direction, and positioning convex bulges are formed on the elastic sheets.

2. The end cover of the vacuum interrupter according to claim 1, characterized in that: The elastic sheet is obtained by punching out the inner wall abutting ring.

3. The end shield of the vacuum interrupter according to claim 1 or 2, characterized in that: The elastic sheet includes a connecting root portion connected to the inner wall abutting ring body and a bulge forming portion connected to the connecting root. Both sides of the connecting root portion and the bulge forming portion are spaced apart from the inner wall abutting ring body, and the positioning bulge is formed on the bulge forming portion.

4. The end cover of the vacuum interrupter according to claim 3, characterized in that: The width of the connecting root portion is smaller than that of the convex bud forming portion.

5. The end cover of the vacuum interrupter according to claim 4, characterized in that: The width of the connecting root is 1.5 mm to 2.5 mm.

6. The end shield of the vacuum interrupter according to claim 3, characterized in that: Hollowed-out windows are formed between the two sides of the elastic sheet and the inner wall of the abutting ring body.

7. The end shield of the vacuum interrupter according to claim 6, characterized in that: The width of the connecting root is smaller than the width of the clearance window between the side of the connecting root and the abutting ring body.

8. The end shield of the vacuum interrupter according to claim 1, characterized in that: The plurality of elastic sheets formed on the inner wall abutting ring are evenly distributed along the circumferential direction.

9. The end shield of the vacuum interrupter according to claim 1, characterized in that: The end cover further comprises a sealing platform connected to an end of the inner wall abutting ring facing away from the elastic sheet.

10. A vacuum interrupter, comprising a porcelain shell, a sealing ring, and an end shield, wherein the end shield is assembled between the porcelain shell and the sealing ring; characterized in that: The end cover is the end cover of the vacuum interrupter according to any one of claims 1 to 9; the end cover is abutted against the inner wall of the porcelain shell by positioning convex bumps formed on multiple elastic sheets to form a positioning assembly.

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