Shielding cylinder fixing structure of vacuum arc-extinguishing chamber

Abstract

The utility model relates to the technical field of vacuum arc extinguish chambers, in particular to a vacuum arc extinguish chamber shielding cylinder fixing structure which comprises a shell, a shielding cylinder and a plurality of movable parts, the shell is provided with a vacuum cavity, the cavity wall of the vacuum cavity is provided with a first protruding part, and the side wall of the shielding cylinder is provided with a second protruding part. The second protruding part abuts against one end of the first protruding part, and each movable part is in threaded connection with the shielding cylinder, extends out of the outer side wall of the shielding cylinder by a preset distance and abuts against the other end of the first protruding part. And the movable piece abuts against the first protruding part, so that the protrusion with the adjustable extending length is achieved, and the shielding cylinder is prevented from shaking and making abnormal sounds.

Description

Technical Field

[0001] This application relates to the field of vacuum interrupter technology, and more specifically to a vacuum interrupter shielding cylinder fixing structure. Background Technology

[0002] A vacuum interrupter is an electrical device that uses the excellent insulation of the vacuum inside the tube to quickly extinguish the arc and suppress the current after the power supply to a medium- or high-voltage circuit is cut off. It is widely used in power transmission and distribution control systems. A vacuum interrupter consists of a ceramic shell and a shielding cylinder. The shielding cylinder prevents the high-temperature metal vapor generated when the moving and stationary guide rods break from splashing and damaging the insulation of the ceramic shell. The shielding cylinder must be fixedly installed on the ceramic shell.

[0003] There is a vacuum interrupter shielding cylinder fixing structure, such as Figure 1 As shown, the device includes a ceramic outer shell 90 and a shielding cylinder 91. The ceramic outer shell 90 has a vacuum cavity 901. The cavity wall of the vacuum cavity 901 has a first annular protrusion 9011. The outer wall of the shielding cylinder 91 has a second annular protrusion 911. The shielding cylinder 91 is placed into the vacuum cavity 901, and the second annular protrusion 911 abuts against one end of the first annular protrusion 9011. Subsequently, an external force is applied to the inner wall of the shielding cylinder 91 by an external device to form an outward protrusion 912. The protrusion 912 abuts against the other end of the first annular protrusion 9011, thereby fixing the shielding cylinder 91. However, since the ceramic shell 90 is fired, the size of the first annular protrusion 9011 is not constant and has a certain dimensional error. Therefore, when the shielding cylinder 91 is fixed by the above-mentioned method of making protrusions 912, there will be a certain gap between the formed protrusions 912 and the first annular protrusion 9011. Although the shielding cylinder 91 is restricted by the second annular protrusion 911 and the protrusions 912 and is difficult to detach from the vacuum cavity 901, due to the above-mentioned gap, the shielding cylinder 91 usually has a certain degree of shaking and produces abnormal noise.

[0004] Therefore, there is a need for a vacuum interrupter shielding cylinder fixing structure with an adjustable protrusion length that helps prevent the shielding cylinder from shaking and making abnormal noises. Summary of the Invention

[0005] The application aims to provide a vacuum arc-extinguishing chamber shielding cylinder fixing structure, which comprises an outer shell, a shielding cylinder and a plurality of movable parts.

[0006] Another purpose of the application is to provide a vacuum arc-extinguishing chamber shielding cylinder fixing structure, wherein the movable part comprises a threaded part and a screwing part, the side wall of the shielding cylinder has a plurality of threaded holes, each threaded hole is threadedly connected with the threaded part, the screwing part is located in the cylinder cavity of the shielding cylinder, the two ends of the first protruding part are respectively provided with an abutting plane and an abutting inclined surface, the second protruding part abuts against the abutting plane, and the end of the threaded part extending out of the threaded hole abuts against the abutting inclined surface.

[0007] In order to achieve at least one of the above purposes, the application provides a vacuum arc-extinguishing chamber shielding cylinder fixing structure, which comprises:

[0008] an outer shell, the outer shell has a vacuum cavity, and the cavity wall of the vacuum cavity is provided with a first protruding part; and

[0009] a shielding cylinder, the side wall of the shielding cylinder is provided with a second protruding part, and the second protruding part abuts against one end of the first protruding part; and

[0010] a plurality of movable parts, each movable part is threadedly connected with the shielding cylinder and extends out of the outer side wall of the shielding cylinder by a predetermined distance, and abuts against the other end of the first protruding part.

[0011] In one or more embodiments of the application, the movable part comprises a threaded part and a screwing part, the side wall of the shielding cylinder has a plurality of threaded holes, each threaded hole is threadedly connected with the threaded part, the screwing part is located in the cylinder cavity of the shielding cylinder, the two ends of the first protruding part are respectively provided with an abutting plane and an abutting inclined surface, the second protruding part abuts against the abutting plane, and the end of the threaded part extending out of the threaded hole abuts against the abutting inclined surface.

[0012] In one or more embodiments of the present application, the center axis of the threaded hole is arranged perpendicularly to the center axis of the shielding cylinder, and the movable piece is arranged horizontally and abuts against the abutting slope.

[0013] In one or more embodiments of the present application, the center axis of the threaded hole is arranged obliquely to the center axis of the shielding cylinder, and the movable piece is arranged obliquely and abuts against the abutting slope.

[0014] In the embodiments of the present application, the vacuum interrupter shielding cylinder fixing structure comprises an outer shell, a shielding cylinder and a plurality of movable pieces, the outer shell has a vacuum cavity, the cavity wall of the vacuum cavity has a first protruding part, the side wall of the shielding cylinder has a second protruding part, the second protruding part abuts against one end of the first protruding part, each movable piece is threadedly connected with the shielding cylinder and extends out of the outer side wall of the shielding cylinder by a predetermined distance, and abuts against the other end of the first protruding part. The movable piece with adjustable extension length is used to adapt to each sintered ceramic outer shell, and the movable piece abuts against the first protruding part, so that the protruding part with adjustable extension length is achieved, and the advantages of avoiding shielding cylinder shaking and abnormal sound are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0015] These and / or other aspects and advantages of the present application will become more apparent and more readily appreciated from the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings in which:

[0016] Figure 1 Fig. 1 shows a structural schematic diagram of a vacuum interrupter shielding cylinder fixing structure according to the prior art;

[0017] Figure 2 Fig. 2 shows a structural schematic diagram of a vacuum interrupter shielding cylinder fixing structure according to a first embodiment of the present application;

[0018] Figure 3 Fig. 3 shows a structural schematic diagram of a vacuum interrupter shielding cylinder fixing structure according to a second embodiment of the present application. DETAILED DESCRIPTION

[0019] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but are merely used to enable a clear and consistent understanding of the present application. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustration purpose only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0020] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0021] Although ordinal numbers such as "first", "second", etc. will be used in describing various components, those components are not limited herein. The terminology is only used to differentiate one component from another component. For example, a first component could be termed a second component and, similarly, a second component could be termed a first component without departing from the teachings of the present inventive concept. The terminology "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "has", when used in this specification, specify the presence of stated features, integers, steps, operations, components, elements, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, elements, or combinations thereof.

[0023] The schematic vacuum arc-extinguishing chamber shielding cylinder fixing structure, refer to Figures 2 to 3 According to the vacuum arc-extinguishing chamber shielding cylinder fixing structure of any preferred embodiment of the present application, the fixing structure comprises an outer shell 10, a shielding cylinder 20 and a plurality of movable members 30.

[0024] Specifically, in any embodiment of the present application, the outer shell 10 has a vacuum cavity 101, the cavity wall of the vacuum cavity 101 has a first protruding part 1011; the side wall of the shielding cylinder 20 has a second protruding part 201, the second protruding part 201 abuts against one end of the first protruding part 1011; each movable member 30 is threadedly connected with the shielding cylinder 20 and extends out of the outer side wall of the shielding cylinder 20 by a predetermined distance, and abuts against the other end of the first protruding part 1011.

[0025] It should be noted that the material of the shell 10 is ceramic, and the first protruding part 1011 and the second protruding part 201 are preferably annular protruding structures. During installation, the shielding cylinder 20 is inserted into the vacuum cavity 101, and the second protruding part 201 abuts against the first protruding part 1011. At this time, one end of the shielding cylinder 20 passes through the area between the first protruding part 1011, and then the installer can screw the movable part 30 until the movable part 30 abuts against the end of the first protruding part 1011 away from the second protruding part 201. At this time, the two ends of the first protruding part 1011 are respectively abutted by the second protruding part 201 and the movable part 30, and the position of the shielding cylinder 20 is fixed. It can be seen that, compared with the prior art which forms a protruding point on the inner wall of the shielding cylinder 20 by applying a force to the inner wall of the shielding cylinder 20 by an external device, and the first protruding part 1011 is located between the second protruding part 201 and the protruding point to prevent the shielding cylinder 20 from being detached, the present application is not affected by the firing error of the first protruding part 1011 during the firing process of the ceramic shell 10. The movable part 30 can be adaptively screwed or unscrewed, and the movable part 30 abuts against the first protruding part 1011. The protruding point formed later does not have the same protruding size or gap between the first protruding part 1011, which has the advantages of adjustable protruding length, and helps to avoid the shielding cylinder 20 from shaking and making abnormal noise.

[0026] Further, in any embodiment of the present application, the movable part 30 comprises a threaded part 301 and a screwing part 302, and the side wall of the shielding cylinder 20 has a plurality of threaded holes 202. Each threaded hole 202 is threadedly connected with a threaded part 301, and the screwing part 302 is located in the cylinder cavity of the shielding cylinder 20. The two ends of the first protruding part 1011 respectively have an abutting flat surface 10111 and an abutting inclined surface 10112. The second protruding part 201 abuts against the abutting flat surface 10111, and the end of the threaded part 301 protruding out of the threaded hole 202 abuts against the abutting inclined surface 10112.

[0027] It should be noted that since the bolt has the threaded part 301 and the screwing part 302, and the cost of the bolt is relatively low, the bolt is the preferred embodiment of the movable part 30.

[0028] Further, in the first embodiment of the present application, as shown in Figure 2 the center axis of the threaded hole 202 is perpendicular to the center axis of the shielding cylinder 20, and the movable part 30 is horizontally arranged and abuts against the abutting inclined surface 10112.

[0029] Figure 3 The second embodiment of the utility model is illustrated, in the second embodiment, the central axis of the threaded hole 202 is arranged obliquely with the central axis of the shielding cylinder 20, and the movable part 30 is arranged obliquely and abuts against the abutting inclined surface 10112.

[0030] It should be noted that the contact area of the threaded part 301 end face and the first protruding part 1011 in the second embodiment is larger than the contact area of the threaded part 301 and the first protruding part 1011 in the first embodiment.

[0031] In summary, the vacuum interrupter shielding cylinder fixing structure based on the embodiments of the present application is illustrated, which provides the protrusion with adjustable extension length for the vacuum interrupter shielding cylinder fixing structure, helps to avoid shielding cylinder shaking and emitting abnormal sound and other advantages.

[0032] It is worth mentioning that in the embodiments of the present application, the vacuum interrupter shielding cylinder fixing structure has simple structure, does not involve complex manufacturing process and expensive materials, and has high economy. At the same time, for the manufacturers, the vacuum interrupter shielding cylinder fixing structure provided by the present application is easy to produce and has low cost, which is more conducive to controlling the production cost, further conducive to product promotion and use.

[0033] Those skilled in the art should understand that the embodiments of the utility model shown in the above description and the drawings are only as examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been demonstrated and explained in the embodiments, and the implementation of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A vacuum interrupter shield cylinder fixing structure, characterized by: The vacuum interrupter shield cylinder fixing structure comprises a shell having a vacuum cavity, a cavity wall of the vacuum cavity having a first protruding part; and a shield cylinder, a side wall of the shield cylinder having a second protruding part, the second protruding part abutting against one end of the first protruding part; and a plurality of movable parts, each of the movable parts being threadedly connected with the shield cylinder and extending out of the outer side wall of the shield cylinder by a predetermined distance, and abutting against the other end of the first protruding part.

2. The vacuum interrupter shield cylinder fixation structure of claim 1, wherein: The movable part comprises a threaded part and a screwing part, the side wall of the shield cylinder has a plurality of threaded holes, each of the threaded holes threadedly connecting with the threaded part, the screwing part being located in the cylinder cavity of the shield cylinder, the two ends of the first protruding part respectively having an abutting flat surface and an abutting inclined surface, the second protruding part abutting against the abutting flat surface, and one end of the threaded part extending out of the threaded hole abutting against the abutting inclined surface.

3. The vacuum interrupter shield cylinder fixation structure of claim 2, wherein: The central axis of the threaded hole is vertically arranged with the central axis of the shield cylinder, and the movable part is horizontally arranged and abuts against the abutting inclined surface.

4. The vacuum interrupter shield cylinder fixation structure of claim 2, wherein: The central axis of the threaded hole is obliquely arranged with the central axis of the shield cylinder, and the movable part is obliquely arranged and abuts against the abutting inclined surface.

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