Sealing ring for vacuum arc-extinguishing chamber

Abstract

The utility model relates to the technical field of vacuum arc-extinguishing chamber assemblies, in particular to a sealing ring for a vacuum arc-extinguishing chamber, and the sealing ring comprises a sealing ring body which comprises an abutting part abutting against the end part of a shell of the vacuum arc-extinguishing chamber and an extending part extending into a vacuum cavity of the shell, the outer side wall of the extending-in part is provided with a plurality of elastic piece parts protruding outwards, when one side, deviating from the outer side wall of the extending-in part, of each elastic piece part is stressed, the stressed area of each elastic piece part moves towards the outer side wall of the extending-in part, the radial size of the extending-in part can be adjusted within a preset range by arranging the extending-in part, and the advantage of better universality is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum interrupter components, and more specifically to a sealing ring for a vacuum interrupter. Background Art

[0002] The vacuum interrupter is an electrical component that uses the excellent insulation of the vacuum inside the tube to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off from the power supply to avoid accidents. It is widely used in medium and high voltage power switch systems. The vacuum interrupter includes a sealing ring, which is mostly arranged between the outer shell and the end cover. Because the outer shell is mostly made of ceramic, and the end cover is mostly made of stainless steel, the thermal expansion coefficients of the two are different. If the two are directly welded, there is a risk of cracking of the outer shell after long-term use. In view of this, the sealing ring is arranged between the outer shell and the end cover. The material of the sealing ring is mostly copper, and its thermal expansion coefficient is between ceramic and stainless steel. The transition is achieved through the sealing ring to reduce the risk of cracking of the outer shell.

[0003] Our company currently has a sealing ring 90, such as Figure 1 As shown, it includes a supporting portion 901 and an extending portion 902, wherein the supporting portion 901 is located at one end of the extending portion 902, and the supporting portion 901 and the extending portion 902 are integrally formed. Figure 2 As shown, the sealing ring 90 is installed in a vacuum interrupter, and the vacuum interrupter includes a shell 91 with a vacuum cavity 911 and an end cover 92, the insertion portion 902 is inserted into the vacuum cavity 911, and the abutting portion 901 abuts against the end of the shell 91, and the end cover 92 is connected to the side of the abutting portion 901 away from the shell 91. It should be noted that the maximum radial dimension of the insertion portion 902 is equal to the end aperture of the vacuum cavity 911, so that after the insertion portion 902 is inserted into the vacuum cavity 911, The side wall of the insertion portion 902 fits with the hole wall of the vacuum chamber 911, and the sealing ring 90 does not move in the circumferential direction, so that subsequent welding personnel can weld the abutment portion 901 to the end of the outer shell 91. However, since the maximum radial dimension of the insertion portion 902 fits with the hole wall of the vacuum chamber 911, the sealing ring 90 is only suitable for an outer shell 91 of one specification size. When manufacturers manufacture vacuum arc chambers of multiple specifications, they need to design and manufacture a sealing ring of one specification size for each vacuum arc chamber, which has poor versatility.

[0004] Therefore, there is a demand for providing a sealing ring for a vacuum interrupter with better versatility. Utility Model Content

[0005] The main purpose of the present application is to provide a sealing ring for a vacuum arc chamber, which is arranged on the vacuum arc chamber, and the vacuum arc chamber includes a shell with a vacuum cavity, wherein the sealing ring for the vacuum arc chamber includes a sealing ring body, and the sealing ring body includes a supporting portion that abuts against the end of the shell and an extending portion that extends into the vacuum cavity, and the outer wall of the extending portion is provided with a plurality of spring pieces protruding outward, when the spring piece portion is subjected to force on the side away from the outer wall of the extending portion, the force-bearing area of ​​the spring piece portion moves toward the outer wall of the extending portion, and the radial dimension of the extending portion is adjustable within a predetermined range by setting the extending portion. Compared with the prior art, it has the advantage of better versatility.

[0006] Another object of the present application is to provide a sealing ring for a vacuum arc chamber, wherein the sealing ring for the vacuum arc chamber also includes a glue bag and a piercing piece for piercing the glue bag, the glue bag stores glue, the glue bag and the piercing piece are both placed in the accommodating cavity, when the annular protrusion abuts against the end of the outer shell, the piercing piece pierces the glue bag, and after the glue bag is pierced, the glue overflows and fills the gap between the annular protrusion and the end of the outer shell, and the annular protrusion is bonded and connected to the end of the outer shell, thereby realizing pre-fixation before welding.

[0007] In order to achieve at least one of the above-mentioned invention purposes, the present application provides a sealing ring for a vacuum interrupter, which is arranged on the vacuum interrupter, wherein the vacuum interrupter includes a shell having a vacuum cavity, wherein the sealing ring for the vacuum interrupter includes:

[0008] A sealing ring body, the sealing ring body includes a supporting portion that abuts against the end of the shell and an extending portion that extends into the vacuum chamber, the outer wall of the extending portion is provided with a plurality of spring pieces protruding outward, when the spring piece portion is subjected to force on the side away from the outer wall of the extending portion, the force-bearing area of ​​the spring piece portion moves toward the outer wall of the extending portion.

[0009] In one or more embodiments of the present application, the abutment portion includes two annular protrusions, which are spaced a predetermined distance apart in the circumferential direction of the sealing ring body and form an accommodating cavity. When the extending portion extends into the vacuum cavity a predetermined distance, the two annular protrusions abut against the end of the outer shell.

[0010] In one or more embodiments of the present application, the sealing ring for the vacuum arc chamber also includes a glue bag and a piercing piece for piercing the glue bag, the glue bag stores glue, the glue bag and the piercing piece are both placed in the accommodating cavity, and when the annular protrusion abuts against the end of the outer shell, the piercing piece pierces the glue bag.

[0011] In one or more embodiments of the present application, the piercing member is a first flat column member, the first flat column member has a first inner cavity with an opening, the first inner cavity has a first spike portion, the top of the first spike portion is flush with the opening edge of the first inner cavity, the glue bag is inserted into the accommodating cavity, one end of the glue bag is abutted against one end of the first flat column member having the first inner cavity, and the other end of the glue bag extends out of the cavity opening of the accommodating cavity by a predetermined distance.

[0012] In one or more embodiments of the present application, the piercing member is a second flat column member and an extension member, the second flat column member has a second inner cavity with an opening, the second inner cavity has a second spike portion, the top of the second spike portion is flush with the opening edge of the second inner cavity, the glue bag is inserted into the accommodating cavity, one end of the glue bag is abutted against one end of the second flat column member having the second inner cavity, the other end of the glue bag is connected to the extension member, and the extension member extends out of the cavity opening of the accommodating cavity by a predetermined distance.

[0013] In one or more embodiments of the present application, the piercing member is a stick body, one end of the stick body has a plurality of third spike portions, the glue bag is inserted into the accommodating cavity, and one end of the stick body having the third spike portions abuts against the glue bag, and the other end of the stick body extends out of the cavity opening of the accommodating cavity by a predetermined distance.

[0014] In one or more embodiments of the present application, the side wall of the stick body has a plurality of extension legs, and the cavity mouth of the accommodating cavity is arranged in a tapered shape. When the stick body is arranged vertically and the central axis of the stick body is coaxially arranged with the central axis of the accommodating cavity, each of the extension legs is spaced a predetermined distance from the cavity wall of the accommodating cavity.

[0015] In one or more embodiments of the present application, the sealing ring body has a through hole at the center.

[0016] In an embodiment of the present application, a sealing ring for a vacuum arc chamber is arranged on the vacuum arc chamber, the vacuum arc chamber includes an outer shell, and the sealing ring for the vacuum arc chamber includes a sealing ring body, the sealing ring body includes a supporting portion that abuts against the end of the outer shell and an extending portion extending into the vacuum chamber, and the outer wall of the extending portion is provided with a plurality of spring pieces protruding outward, when the spring piece portion is subjected to force on the side away from the outer wall of the extending portion, the force-bearing area of ​​the spring piece portion moves toward the outer wall of the extending portion, and the radial dimension of the extending portion is adjustable within a predetermined range by setting the extending portion, which has the advantage of better versatility compared to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0018] Figure 1 The figure shows a schematic structural diagram of an existing sealing ring;

[0019] Figure 2 The figure shows a schematic diagram of an existing sealing ring installed on a vacuum interrupter;

[0020] Figure 3 The figure shows a structural schematic diagram of a sealing ring for a vacuum interrupter in the first embodiment of the utility model;

[0021] Figure 4 The figure shows a schematic diagram of a sealing ring for a vacuum interrupter chamber of the utility model installed on the vacuum interrupter chamber;

[0022] Figure 5 Picture shows Figure 3 A local enlarged view of point C;

[0023] Figure 6 The figure shows a schematic structural diagram of the piercing member and the glue bag in the second embodiment;

[0024] Figure 7 The figure shows a schematic structural diagram of the piercing member and the glue bag in the third embodiment. DETAILED DESCRIPTION

[0025] The terms and words used in the following specification and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustrative purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0026] It is to 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 an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0027] Although ordinals such as "first," "second," and the like will be used to describe various components, those components are not limited herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more associated listed items.

[0028] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates an exception. In addition, it will be understood that the terms "including" and / or "having" when used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0029] Schematic sealing ring for vacuum interrupter,

[0030] refer to Figures 3 to 7 According to any one of the embodiments of the present invention, a sealing ring for a vacuum interrupter is provided on the vacuum interrupter, such as Figure 4 As shown, the vacuum interrupter includes a housing 91 having a vacuum cavity 911 and an end cover 92 .

[0031] Further, in any embodiment of the present invention, if Figure 3 and Figure 4 As shown, the sealing ring for the vacuum arc extinguishing chamber includes a sealing ring body 10, and the sealing ring body 10 includes a supporting portion 101 that abuts against the end of the outer shell 91 and an extending portion 102 extending into the vacuum chamber 911, and the outer wall of the extending portion 102 is provided with a plurality of spring pieces 103 protruding outward, when the spring piece 103 is subjected to force on the side away from the outer wall of the extending portion 102, the force-bearing area of ​​the spring piece 103 moves toward the outer wall of the extending portion 102.

[0032] It should be noted that, in any embodiment of the present invention, Figure 3As shown, the insertion portion 102 is cylindrical, and the outer side wall of the insertion portion 102 has a plurality of avoidance openings 1021, and each of the avoidance openings 1021 has a spring portion 103, one end of the spring portion 103 is fixedly connected to the sealing ring body 10, and the fixed connection method includes but is not limited to welding or integral molding, and the other end of the spring portion 103 is bent at a predetermined angle in a direction away from the avoidance opening 1021 and is arranged in an inclined manner. Under normal conditions, the spring portion 103 protrudes outward, and the maximum radial dimension of the insertion portion 102 at the spring portion 103 is larger than the maximum radial dimension of the remaining positions of the insertion portion 102. It should be supplemented that the maximum radial dimension of the portion of the insertion portion 102 without the spring portion 103 is smaller than the aperture of the end of the vacuum chamber 911, while the maximum radial dimension of the insertion portion 102 at the spring portion 103 is larger than the aperture of the end of the vacuum chamber 911. Therefore, when the insertion portion 102 is During the process of extending 02 into the vacuum chamber 911, when the cavity wall of the end of the vacuum chamber 911 applies a horizontal force to the spring portion 103 that bends at a predetermined angle in the direction of the avoidance opening 1021, until the abutting portion 101 abuts against the end of the shell 91, during this process, the spring portion 103 always abuts against the cavity wall of the vacuum chamber 911 under the action of its own elastic force, and a clamping force exists between the sealing ring body 10 and the shell 91, so as to facilitate the subsequent welding of the abutting portion 101 and the end of the shell 91. At the same time, by setting the spring portion 103, the radial dimension of the extending portion 102 is no longer constant to a fixed value. As long as the aperture size of the vacuum chamber 911 end of the shell 91 is between the minimum radial dimension and the maximum radial dimension of the extending portion 102, the sealing ring for the vacuum arc chamber can be installed. Compared with the constant radial dimension of the extending portion 102 in the prior art, the embodiment of the present application has the advantage of better versatility.

[0033] Further, in any embodiment of the present invention, if Figure 5 As shown, the abutment portion 101 includes two annular protrusions 1011, and the two annular protrusions 1011 are spaced a predetermined distance apart in the circumferential direction of the sealing ring body 10 to form an accommodating cavity 1012. When the extending portion 102 extends into the vacuum cavity 911 by a predetermined distance, the two annular protrusions 1011 abut against the end of the outer shell 91.

[0034] It should be noted that the provision of two annular protrusions 1011 and the two annular protrusions 1011 abutting against the end of the housing 91 helps to improve the sealing performance. It should also be added that during welding, the annular protrusion 1011 located on the outside is welded to the end of the housing 91.

[0035] However, after the annular protrusion 1011 located on the inner side abuts against the end of the outer shell 91, a gap may still exist between the annular protrusion 1011 and the end of the outer shell 91 due to factors such as surface roughness. At the same time, when the annular protrusion 1011 located on the outer side is welded to the end of the outer shell 91, although there is a clamping force between the spring portion 103 and the outer shell 91, the sealing ring body 10 is still easy to rotate circumferentially, which is not conducive to welding.

[0036] In view of this, in any embodiment of the present invention, if Figure 5 As shown, the sealing ring for the vacuum arc chamber also includes a glue bag 20 and a piercing member 30 for piercing the glue bag 20. Glue is stored in the glue bag 20. The glue bag 20 and the piercing member 30 are both placed in the accommodating cavity 1012. When the annular protrusion 1011 abuts against the end of the outer shell 91, the piercing member 30 pierces the glue bag 20.

[0037] It should be noted that, by arranging the glue bag 20 and the piercing member 30 in the accommodating cavity 1012, when the two annular protrusions 1011 abut against the end of the outer shell 91, the glue bag 20 is pierced by the piercing member 30, and the glue in the glue bag 20 overflows and fills the gap between the annular protrusion 1011 and the end of the outer shell 91, thereby achieving the sealing at the abutment point between the annular protrusion 1011 located on the inner side and the end of the outer shell 91. At the same time, since the annular protrusion 1011 is adhesively connected to the outer shell 91, it can be regarded as a pre-fixation before welding, so that the subsequent welding personnel can weld the annular protrusion 1011 located on the outer side to the outer shell 91.

[0038] Further, in the first embodiment of the present utility model, as Figure 5 As shown, the piercing member 30 is a first flat column member 301, and the first flat column member 301 has a first inner cavity 3011 with an opening, and the first inner cavity 3011 has a first spike portion 3012, and the top of the first spike portion 3012 is flush with the opening edge of the first inner cavity 3011, and the glue bag 20 is inserted into the accommodating cavity 1012, and one end of the glue bag 20 is against one end of the first flat column member 301 having the first inner cavity 3011, and the other end of the glue bag 20 extends out of the cavity opening of the accommodating cavity 1012 by a predetermined distance.

[0039] It should be noted that, in the first embodiment, when the two annular protrusions 1011 abut against the end of the outer shell 91, the glue bag 20 originally extending out of the mouth of the accommodating cavity 1012 is blocked by the end of the outer shell 91 and further moves toward the first inner cavity 3011 of the first flat column member 301 and fills it. At a certain moment, the glue bag 20 is pierced by the first spike portion 3012, and the glue in the glue bag 20 overflows and causes the two annular protrusions 1011 to be bonded and connected to the end of the outer shell 91.

[0040] It should also be noted that in the first embodiment, since one end of the glue bag 20 needs to extend out of the cavity 1012 by a predetermined distance, the overall size of the glue bag 20 is larger, and more glue is required to fill the glue bag 20, resulting in excessive waste of glue.

[0041] In view of this, in the second embodiment of the present utility model, as Figure 6 As shown, the piercing member 30 is a second flat column member 302 and an extension member 303, the second flat column member 302 has a second inner cavity 3021 with an opening, the second inner cavity 3021 has a second spike portion 3022, the top of the second spike portion 3022 is flush with the opening edge of the second inner cavity 3021, the glue bag 20 is inserted into the accommodating cavity 1012, one end of the glue bag 20 is against one end of the second flat column member 302 having the second inner cavity 3021, the other end of the glue bag 20 is connected to the extension member 303, and the extension member 303 extends out of the cavity opening of the accommodating cavity 1012 by a predetermined distance.

[0042] It should be noted that, in the second embodiment, by providing the extension piece 303 and making the glue bag 20 located between the second flat column piece 302 and the extension piece 303, when the two annular protrusions 1011 abut against the end of the shell 91, the extension piece 303 is blocked and moves a predetermined distance toward the glue bag 20, and the glue bag 20 is punctured by the second spike portion 3022 at a certain moment; it should be supplemented that the end of the extension piece 303 is connected to the glue bag 20 in an adhesive manner.

[0043] It should also be noted that, compared with the first embodiment, the advantage of the second embodiment is that the size of the glue bag 20 can be made smaller, saving glue, but because the contact area between the glue bag 20 and the wall of the accommodating cavity 1012 is smaller, the risk of the glue bag 20 and the extension piece 303 falling out of the accommodating cavity 1012 is higher.

[0044] In view of this, in the third embodiment of the present utility model, as Figure 7As shown, the piercing member is a stick body 304, one end of which has a plurality of third spike portions 3041, the glue bag 20 is inserted into the accommodating cavity 1012, and one end of the stick body 304 having the third spike portion 3041 abuts against the glue bag 20, and the other end of the stick body 304 extends out of the cavity opening of the accommodating cavity 1012 by a predetermined distance.

[0045] In addition, in the third embodiment, if Figure 7 As shown, the side wall of the stick body 304 has a plurality of extension legs 3042 staggered along the length direction of the stick body 304, and the cavity mouth of the accommodating cavity 1012 is arranged in a constricted manner. When the stick body 304 is arranged vertically and the central axis of the stick body 304 is coaxially arranged with the central axis of the accommodating cavity 1012, each of the extension legs 3042 is spaced a predetermined distance from the cavity wall of the accommodating cavity 1012.

[0046] It should be noted that when the stick body 304 is inserted into the accommodating cavity 1012, the stick body 304 is inserted into the accommodating cavity 1012 at an angle, so that the extended leg 3042 can pass through the cavity opening of the accommodating cavity 1012 which is arranged in a tapered shape. When the two annular protrusions 1011 abut against the end of the outer shell 91, the stick body 304 moves toward the glue bag 20 and pierces the glue bag 20. By making the cavity opening of the accommodating cavity 1012 in a tapered shape, the risk of the stick body 304 escaping from the accommodating cavity 1012 is reduced. In addition, compared with the second embodiment, the structure is simpler.

[0047] Further, in any embodiment of the present invention, if Figure 3 As shown, the sealing ring body 10 has a through hole 104 at its center, so that the external conductive rod can pass through the sealing ring body 10 .

[0048] In summary, the sealing ring for the vacuum interrupter chamber based on the embodiment of the present application is explained, which provides the sealing ring for the vacuum interrupter chamber with the advantage of better versatility.

[0049] It is worth mentioning that in the embodiment of the present application, the sealing ring for the vacuum interrupter has a simple structure, does not involve complex manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the sealing ring for the vacuum interrupter provided by the present application is easy to produce and has low cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0050] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A sealing ring for a vacuum interrupter, provided on the vacuum interrupter, wherein the vacuum interrupter comprises a housing having a vacuum cavity, characterized in that: The sealing ring for the vacuum interrupter comprises A sealing ring body, the sealing ring body includes a supporting portion that abuts against the end of the shell and an extending portion that extends into the vacuum chamber, the outer wall of the extending portion is provided with a plurality of spring pieces protruding outward, when the spring piece portion is subjected to force on the side away from the outer wall of the extending portion, the force-bearing area of ​​the spring piece portion moves toward the outer wall of the extending portion.

2. The sealing ring for a vacuum interrupter according to claim 1, characterized in that: The abutting portion includes two annular protrusions, which are spaced a predetermined distance apart in the circumferential direction of the sealing ring body and form an accommodating cavity. When the extending portion extends into the vacuum cavity by a predetermined distance, the two annular protrusions abut against the end of the shell.

3. The sealing ring for a vacuum interrupter according to claim 2, characterized in that: The sealing ring for the vacuum arc extinguishing chamber also includes a glue bag and a piercing piece for piercing the glue bag. Glue is stored in the glue bag. The glue bag and the piercing piece are both placed in the accommodating cavity. When the annular protrusion abuts against the end of the shell, the piercing piece pierces the glue bag.

4. The sealing ring for a vacuum interrupter according to claim 3, characterized in that: The piercing member is a first flat column member, which has a first inner cavity with an opening, and a first spike portion is provided in the first inner cavity, and the top of the first spike portion is flush with the opening edge of the first inner cavity. The glue bag is inserted into the accommodating cavity, and one end of the glue bag abuts against one end of the first flat column member having the first inner cavity, and the other end of the glue bag extends out of the cavity opening of the accommodating cavity by a predetermined distance.

5. The sealing ring for vacuum interrupter according to claim 3, characterized in that: The piercing member is a second flat column member and an extension member, the second flat column member has a second inner cavity with an opening, the second inner cavity has a second spike portion, the top of the second spike portion is flush with the opening edge of the second inner cavity, the glue bag is inserted into the accommodating cavity, one end of the glue bag abuts against one end of the second flat column member having the second inner cavity, the other end of the glue bag is connected to the extension member, and the extension member extends out of the cavity opening of the accommodating cavity by a predetermined distance.

6. The sealing ring for a vacuum interrupter according to claim 3, characterized in that: The piercing member is a stick body, one end of which has a plurality of third spikes, the glue bag is inserted into the accommodating cavity, and one end of the stick body having the third spikes abuts against the glue bag, and the other end of the stick body extends out of the cavity opening of the accommodating cavity by a predetermined distance.

7. The sealing ring for a vacuum interrupter according to claim 6, characterized in that: The side wall of the stick body has a plurality of extension legs, and the cavity opening of the accommodating cavity is arranged in a constricted manner. When the stick body is arranged vertically and the central axis of the stick body is coaxially arranged with the central axis of the accommodating cavity, each of the extension legs is spaced a predetermined distance from the cavity wall of the accommodating cavity.

8. The sealing ring for a vacuum interrupter according to any one of claims 1 to 7, characterized in that: The sealing ring body has a through hole at its center.

Images