CN219017525U - Vacuum arc-extinguishing chamber - Google Patents
Vacuum arc-extinguishing chamber Download PDFInfo
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- CN219017525U CN219017525U CN202223371879.XU CN202223371879U CN219017525U CN 219017525 U CN219017525 U CN 219017525U CN 202223371879 U CN202223371879 U CN 202223371879U CN 219017525 U CN219017525 U CN 219017525U
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Abstract
The utility model provides a vacuum arc-extinguishing chamber, comprising: a housing; the shielding section of thick bamboo, the circumference of shielding section of thick bamboo is provided with a plurality of protruding structures at intervals, and protruding structure is protruding for the surface of shielding section of thick bamboo, and shielding section of thick bamboo sets up in the shell to protruding structure and the inner wall surface contact of shell or support and lean on. According to the vacuum arc extinguishing chamber provided by the utility model, the plurality of protruding structures are arranged on the circumference of the shielding cylinder, when the shielding cylinder is assembled in the shell, the protruding structures are propped against the inner wall surface of the shell, the protruding structures on the shielding cylinder are matched with the shell to realize the alignment of the shielding cylinder, so that the good coaxiality of the shielding cylinder and the shell is ensured, the positions of the shielding cylinder and the shell in the circumferential direction are relatively fixed by the design of the protruding structures, when the shell and the shielding cylinder are fixed, the possibility of shifting and jumping caused by stress of the shielding cylinder in the fixing process is reduced, and the fixation between the shell and the shielding cylinder is firmer, so that the accurate assembly is realized.
Description
Technical Field
The utility model relates to the field of electrical equipment, in particular to a vacuum arc-extinguishing chamber.
Background
The vacuum interrupter mainly comprises parts such as shell, shielding section of thick bamboo, contact and bellows, and wherein the shielding section of thick bamboo has three effects: 1) The method is characterized by comprising the steps of preventing a large amount of metal vapor and liquid drops generated between contacts in the arcing process from splashing to the inner wall of a shell insulating cylinder, so that the insulating strength of the shell of the vacuum arc-extinguishing chamber is reduced or flashover is caused; 2) The uniform distribution of the electric field inside the vacuum arc-extinguishing chamber is improved; 3) Cooling and condensing the arc formation aids in rapid decay of the residual plasma after the arc has extinguished.
In the production process of the vacuum arc-extinguishing chamber, a shielding cylinder needs to be accurately assembled, and the existing vacuum arc-extinguishing chamber is generally poor in assembly precision of the shielding cylinder and a shell, and coaxiality of the shielding cylinder and the shell cannot be guaranteed.
Disclosure of Invention
An object of the present utility model is to provide a vacuum interrupter, which aims to solve the problem of poor coaxiality between the current housing and the shielding cylinder.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the technical scheme of one aspect of the utility model provides a vacuum arc extinguishing chamber, which comprises:
a housing;
a shielding cylinder, wherein a plurality of protruding structures are arranged at intervals in the circumferential direction of the shielding cylinder, the protruding structures protrude relative to the outer surface of the shielding cylinder, the shielding cylinder is arranged in the shell, and the protruding structures are in contact with or abut against the inner wall surface of the shell;
the inner wall surface of the shell is provided with a limiting protruding part, the shielding cylinder is provided with a limiting clamping groove, and the limiting protruding part extends into the limiting clamping groove, so that the shielding cylinder is clamped and limited in the shell;
the shielding cylinder is provided with a main body part, a closing-in part and an arc-shaped part, wherein the main body part is provided with a protruding structure, the closing-in part is positioned at one end of the main body part and is narrowed inwards relative to the main body part, the arc-shaped part is in transition connection with the main body part and the closing-in part, one end of the closing-in part, far away from the arc-shaped part, is turned outwards to form a flanging, and the arc-shaped part, the closing-in part and the flanging define the limiting clamping groove.
According to some aspects of the utility model, the plurality of raised structures are distributed along the outer surface of the shield can; or alternatively
The plurality of protruding structures are arranged in a plurality of rows along the axial direction of the shielding cylinder, and the positions of the protruding structures in two adjacent rows are opposite one to one.
According to some aspects of the utility model, the maximum distance of the protrusions of the plurality of protrusion structures relative to the outer surface of the shielding cylinder is consistent.
According to some embodiments of the present utility model, the protrusion structure is configured as a concave-convex structure, and the outer surface of the protrusion structure includes a protrusion top surface and a protrusion side surface disposed along an outer periphery of the protrusion top surface, and the protrusion top surface contacts or abuts against an inner wall surface of the housing.
According to some technical schemes of the utility model, the inner surface of the convex structure is arc-shaped and transits with the inner surface cambered surface of the shielding cylinder.
According to some aspects of the utility model, the limit projection has a first face and a second face spaced along an axial direction of the housing, the first face being opposite the burring position and the second face being opposite the arcuate position, wherein the second face is configured as a flat face or as an arcuate face adapted to the arcuate portion.
According to some technical schemes of the utility model, the limiting snap ring is positioned between the first surface and the flanging, and the limiting protrusion and the limiting snap ring are clamped in the limiting clamping groove together.
According to some technical solutions of the present utility model, the limiting protrusion is disposed to extend along a circumferential direction of the housing;
the shell is a ceramic piece, and the limiting snap ring and the shielding cylinder are metal pieces respectively;
the shell is hollow with two open ends, a first opening for the shielding cylinder to enter is defined at one axial end of the shell, and a second opening for the punching equipment to enter and exit is defined at the other axial end of the shell.
According to the vacuum arc extinguishing chamber provided by the utility model, the plurality of protruding structures are arranged on the circumference of the shielding cylinder, when the shielding cylinder is assembled in the shell, the protruding structures are propped against the inner wall surface of the shell, the protruding structures on the shielding cylinder are matched with the shell to realize the alignment of the shielding cylinder, so that the good coaxiality of the shielding cylinder and the shell is ensured, the positions of the shielding cylinder and the shell in the circumferential direction are relatively fixed by the design of the protruding structures, the possibility of shifting and jumping due to the stress of the shielding cylinder in the fixing process is reduced when the shell and the shielding cylinder are fixed, and the fixation between the shell and the shielding cylinder is firmer, so that the accurate assembly is realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.
Drawings
The above and other objects, features and advantages of the present utility model will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic sectional view of a vacuum interrupter according to a first embodiment of the present utility model.
Fig. 2 is a schematic cross-sectional structure of a vacuum interrupter according to a second embodiment of the utility model.
Fig. 3 is a schematic cross-sectional structure of a vacuum interrupter according to a third embodiment of the utility model.
Fig. 4 is a schematic cross-sectional view of the shield can of the present utility model.
The reference numerals are as follows:
100. a vacuum arc extinguishing chamber; 110. a housing; 111. a limit protruding part; 1111. a first face; 1112. a second face; 112. a first port; 123. a second port;
120. a shielding cylinder; 1201. a main body portion; 1202. a receiving portion; 1203. an arc-shaped portion; 1204. flanging; 121. a bump structure; 1211. a convex top surface; 1212. a convex side; 122. a limit clamping groove; 130. and a limiting snap ring.
Detailed Description
While this utility model is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail, specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the utility model and is not intended to limit the utility model to that as illustrated.
Thus, reference throughout this specification to one feature will be used in order to describe one embodiment of the utility model, not to imply that each embodiment of the utility model must be in the proper motion. Furthermore, it should be noted that the present specification describes a number of features. Although certain features may be combined together to illustrate a possible system design, such features may be used in other combinations not explicitly described. Thus, unless otherwise indicated, the illustrated combinations are not intended to be limiting.
In the embodiments shown in the drawings, indications of orientation (such as up, down, etc.) are used to explain the structure and movement of the various elements of the utility model as opposed to absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the position of these elements changes, the indication of these directions changes accordingly.
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present utility model and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.
Preferred embodiments of the present utility model will be further elaborated below with reference to the drawings of the present specification.
As shown in fig. 1 and 2, an embodiment of an aspect of the present utility model proposes a vacuum interrupter 100 including: a housing 110 and a shield can 120.
The housing 110 is constructed in a hollow structure, a plurality of protruding structures 121 are provided at intervals in the circumferential direction of the shield cylinder 120, the protruding structures 121 protrude with respect to the outer surface of the shield cylinder, the shield cylinder 120 is provided inside the housing 110, and the protruding structures 121 are in contact with or abut against the inner wall surface of the housing 110.
According to the vacuum arc extinguishing chamber 100 provided by the utility model, the plurality of the protruding structures 121 are arranged on the circumference of the shielding cylinder 120, when the shielding cylinder 120 is assembled in the shell 110, the shielding cylinder 120 can prop against the inner wall surface of the shell 110 through the protruding structures 121 in the circumference of the shielding cylinder 120, the protruding structures 121 on the shielding cylinder 120 are matched with the shell 110 to realize automatic alignment of the shielding cylinder 120, so that good coaxiality of the shielding cylinder 120 and the shell 110 is ensured, the protruding structures 121 are designed to ensure that the shielding cylinder 120 and the shell 110 are relatively fixed at the circumferential position, and when the shell 110 and the shielding cylinder 120 are subjected to a fixing step, the possibility of displacement and movement caused by stress of the shielding cylinder 120 in the fixing process is reduced, and the fixation between the shell 110 and the shielding cylinder 120 is firmer, so that accurate assembly is realized.
In addition, the design of the protruding structure 121 makes a certain gap between the outer surface of the shielding cylinder 120 and the inner wall surface of the housing 110, so that the shielding cylinder 120 has a certain deformation space with thermal expansion and contraction, and the deformation of the shielding cylinder 120 during heating is facilitated.
In some embodiments, the plurality of protruding structures 121 may be designed to be distributed along the outer surface of the shielding cylinder, or, as shown in fig. 3 and 4, the plurality of protruding structures 121 may be designed to be arranged in multiple rows along the axial direction of the shielding cylinder 120 (the axial direction of the shielding cylinder 120 may be understood with reference to the y reference line illustrated in fig. 1), and the positions of the protruding structures 121 of two adjacent rows are opposite to each other. Thus, the shielding cylinder 120 and the housing 110 can have good coaxiality from top to bottom in the axial direction of the housing 110, and the assembly accuracy between the shielding cylinder 120 and the housing 110 is further improved.
The number of the bump structures 121 is not limited to the present utility model, and the number of the bump structures 121 may be 2, 3, 4, 6, 8 or more.
In certain embodiments, the maximum distance that the plurality of raised structures 121 are raised relative to the outer surface of the shield can is consistent. In this way, the distance from the shielding cylinder 120 to the housing 110 is approximately the same in the circumferential direction of the shielding cylinder 120, so that good coaxiality of the shielding cylinder 120 and the housing 110 is ensured.
It should be noted that, the maximum distances of the protrusions 121 with respect to the outer surface of the shielding cylinder are consistent, and the maximum distances of the protrusions 121 with respect to the outer surface of the shielding cylinder are not required to be equal, but may be substantially the same within the allowable error range.
In some embodiments, the protrusion structure 121 is configured as a concave-convex structure, and the outer surface of the protrusion structure 121 includes a protrusion top surface 1211 and a protrusion side surface 1212 disposed along the outer circumference of the protrusion top surface 1211, the protrusion top surface 1211 contacting or abutting the inner wall surface of the housing 110.
In this embodiment, the protruding structure 121 is configured to be a concave-convex structure, such a structure is simple in form and more convenient to process, for example, the protruding structure 121 can be directly formed by stamping through a stamping device, and the protruding structure 121 is provided with the protruding top surface 1211, so that the contact surface between the protruding top surface 1211 and the inner wall surface of the housing 110 is larger, the stability of the shielding cylinder 120 in the housing 110 is not easy to shake or shift, particularly when the housing 110 and the shielding cylinder 120 are fixed, the stability of the position between the housing 110 and the shielding cylinder 120 is greatly improved due to the design of the protruding top surface 1211, the possibility that the shielding cylinder 120 is forced to shift or float in the fixing process is reduced, and the fixation between the housing 110 and the shielding cylinder 120 is firmer and the position precision is higher.
Further, the inner surface of the protrusion structure 121 is arc-shaped and transitions with the inner surface arc surface of the shield can 120. The inner surface of the shielding cylinder 120 is smooth and has no sharp end as a whole, which is beneficial to guaranteeing the uniformity of an electric field in the shielding cylinder 120, reducing the risk of tip discharge and prolonging the service life of the shielding cylinder 120.
In some embodiments, the inner wall surface of the housing 110 is provided with a limiting protrusion 111, and the shielding cylinder 120 is configured with a limiting slot 122, and the limiting protrusion 111 extends into the limiting slot 122, so that the shielding cylinder 120 is clamped and limited in the housing 110. A fixed connection between the housing 110 and the shield can 120 is achieved.
It should be noted that the above is only a preferred embodiment of the present utility model, and in other embodiments, it is also possible to design the shielding cylinder 120 and the housing 110 to achieve the fixed assembly between them by other manners, such as welding, riveting, etc., which are not listed herein.
In some embodiments, shield can 120 is configured with a main body portion 1201, a necked-in portion 1202, and an arcuate portion 1203, the necked-in portion 1202 being located at one end of the main body portion 1201 and being narrowed inwardly relative to the main body portion 1201, i.e., the necked-in portion 1202 has an inner diameter that is smaller than the inner diameter of the main body portion 1201. The arc-shaped part 1203 is in transitional connection with the main body part 1201 and the closing-in part 1202, one end of the closing-in part 1202 away from the arc-shaped part 1203 is turned outwards to form a flanging 1204, and the limiting clamping groove 122 is defined by the arc-shaped part 1203, the closing-in part 1202 and the flanging 1204. Thus, while the limiting clamping groove 122 is clamped with the limiting protruding portion 111 of the shell 110, the processing technology difficulty of the shielding barrel 120 is reduced, the processing is facilitated, the arc-shaped portion 1203 is in transitional connection with the main body portion 1201 and the closing-in portion 1202, the inner surface of the shielding barrel 120 is integrally smooth and free of tips, the electric field uniformity in the shielding barrel 120 is guaranteed, the risk of tip discharge is reduced, and the service life of the shielding barrel 120 is prolonged.
The main body 1201 is provided with the protrusion structure 121, so that the protrusion structure 121 is on the main body 1201 to realize self-positioning and alignment of the shielding cylinder 120 in the housing 110, and the limiting groove is at the position of the closing-in part 1202 to realize fixation between the shielding cylinder 120 and the housing 110.
Still further, the limit projection 111 has a first face 1111 and a second face 1112 spaced apart along the axial direction of the housing 110, the first face 1111 being located opposite the flange 1204, the second face 1112 being located opposite the arcuate portion 1203, wherein the second face 1112 is configured as a flat surface as shown in fig. 1 or the second face 1112 is configured as an arcuate face adapted to the arcuate portion 1023 as shown in fig. 2 and 3. The second surface 1112 is configured into an arc-shaped surface matched with the arc-shaped portion 1023, so that the contact surface between the second surface 1112 and the arc-shaped portion 1023 is increased, and the reliability of clamping of the second surface 1112 and the arc-shaped portion 1023 is improved.
In some embodiments, the vacuum interrupter 100 further includes a retaining collar located between the first face 1111 and the flange 1204, and the retaining protrusion and the retaining collar are clamped together in the retaining slot 122. Utilize spacing snap ring to separate between first face 1111 and turn-ups 1204, when guaranteeing spacing bellying 111 can the joint in spacing recess, still play the cushioning effect, reduce the in-process to punching press with the processing of turn-ups 1204 to binding off portion 1202, spacing bellying 111 direct atress and the risk of damaging.
For example, the cross section of the retainer ring may be configured in any one of a circular shape, a rectangular shape, an elliptical shape, and a semicircular shape.
In some embodiments, the limiting protrusion 111 extends along the circumference of the housing 110, so that the clamping between the limiting protrusion 111 and the limiting groove is reliable and not easy to fall off.
In some embodiments, the housing 110 is a ceramic piece, the limiting snap ring and the shielding cylinder 120 are metal pieces respectively, and the metal pieces have the advantages of convenient processing and low cost, and also play a role in buffering, so that the risk that the limiting boss 111 is directly stressed to be damaged in the process of punching the closing-in part 1202 to process the flanging 1204 is reduced.
The housing 110 is hollow with two open ends, and the housing 110 defines a first opening 112 for the shielding cylinder 120 to enter at one axial end and a second opening 123 for the punching device to enter and exit at the other axial end.
While the utility model has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present utility model may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (8)
1. A vacuum interrupter, comprising:
a housing;
a shielding cylinder, wherein a plurality of protruding structures are arranged at intervals in the circumferential direction of the shielding cylinder, the protruding structures protrude relative to the outer surface of the shielding cylinder, the shielding cylinder is arranged in the shell, and the protruding structures are in contact with or abut against the inner wall surface of the shell;
the inner wall surface of the shell is provided with a limiting protruding part, the shielding cylinder is provided with a limiting clamping groove, and the limiting protruding part extends into the limiting clamping groove, so that the shielding cylinder is clamped and limited in the shell;
the shielding cylinder is provided with a main body part, a closing-in part and an arc-shaped part, wherein the main body part is provided with a protruding structure, the closing-in part is positioned at one end of the main body part and is narrowed inwards relative to the main body part, the arc-shaped part is in transition connection with the main body part and the closing-in part, one end of the closing-in part, far away from the arc-shaped part, is turned outwards to form a flanging, and the arc-shaped part, the closing-in part and the flanging define the limiting clamping groove.
2. The vacuum interrupter according to claim 1, wherein,
a plurality of the convex structures are distributed along the outer surface of the shielding cylinder; or alternatively
The plurality of protruding structures are arranged in a plurality of rows along the axial direction of the shielding cylinder, and the positions of the protruding structures in two adjacent rows are opposite one to one.
3. The vacuum interrupter according to claim 1 or 2, wherein,
the maximum distances of the protrusions of the plurality of the protrusion structures relative to the outer surface of the shielding cylinder are consistent.
4. The vacuum interrupter according to claim 1 or 2, wherein,
the protruding structure sets up to indent evagination structure, protruding structure's surface includes protruding top surface and follows protruding side that protruding top surface's periphery set up, protruding top surface with the inner wall surface contact of shell or support.
5. The vacuum interrupter as defined in claim 4, wherein,
the inner surface of the protruding structure is arc-shaped and is in arc-shaped transition with the inner surface of the shielding cylinder.
6. The vacuum interrupter according to claim 1, wherein,
the limiting protruding portion is provided with a first face and a second face which are axially spaced along the shell, the first face is opposite to the flanging position, the second face is opposite to the arc-shaped portion, and the second face is configured to be a plane or an arc-shaped face matched with the arc-shaped portion.
7. The vacuum interrupter of claim 6, further comprising:
the limiting clamp ring is positioned between the first surface and the flanging, and the limiting protrusion and the limiting clamp ring are clamped in the limiting clamping groove together.
8. The vacuum interrupter of claim 7, wherein,
the limiting protruding part extends along the circumferential direction of the shell;
the shell is a ceramic piece, and the limiting snap ring and the shielding cylinder are metal pieces respectively;
the shell is hollow with two open ends, a first opening for the shielding cylinder to enter is defined at one axial end of the shell, and a second opening for the punching equipment to enter and exit is defined at the other axial end of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223371879.XU CN219017525U (en) | 2022-12-15 | 2022-12-15 | Vacuum arc-extinguishing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223371879.XU CN219017525U (en) | 2022-12-15 | 2022-12-15 | Vacuum arc-extinguishing chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219017525U true CN219017525U (en) | 2023-05-12 |
Family
ID=86245522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223371879.XU Active CN219017525U (en) | 2022-12-15 | 2022-12-15 | Vacuum arc-extinguishing chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219017525U (en) |
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2022
- 2022-12-15 CN CN202223371879.XU patent/CN219017525U/en active Active
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