Getter structure for vacuum arc-extinguishing chamber with long mechanical life

Abstract

The utility model discloses a getter structure for a vacuum arc-extinguishing chamber with long mechanical life. The getter structure comprises a getter base body and a getter suction pressed powder wrapped in the getter base body, the getter base body comprises a cavity and a welding outer ring which are fixedly connected; the outer contour line of the welding outer ring is circular; a plurality of holes are formed in the wall surface of the cavity and are used for enabling the getter air suction pressed powder to be in contact with the external environment. The utility model discloses a getter structure for a vacuum arc-extinguishing chamber with long mechanical life, which is characterized in that a welding outer ring of a getter base body is circular, so that the spot welding outer contour of the getter base body is circular, the stress generated during spot welding of the conventional getter with a square outer contour can be effectively reduced, and the welding reliability is improved. Besides, a plurality of holes are formed in the cavity of the getter base body to form a net structure, so that the good air suction characteristic of the getter air suction pressed powder is guaranteed, and the problem that the getter air suction pressed powder falls off after multiple times of mechanical running-in in a vacuum arc extinguish chamber with long mechanical service life is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of getter materials and relates to a getter material structure for a vacuum arc extinguishing chamber with a long mechanical life. Background Art

[0002] Vacuum degree is a main parameter to measure the vacuum performance of vacuum interrupter. In order to keep good vacuum degree in vacuum interrupter during long-term use, getter is fixed on the parts in the tube before sealing and activated during sealing to realize the function of continuous air suction. The existing getter structure is divided into: strip getter and disc getter. The strip getter powder cake is fixed on the metal base strip. The spot welding area of ​​the disc getter metal base is rectangular. The upper circular part of the getter powder cake is exposed for air suction. For the interrupter with long mechanical life, the problem of overall getter falling off and getter powder cake falling off often occurs. If the getter falls off, it will directly affect the performance of the interrupter. Utility Model Content

[0003] The utility model aims to solve the technical problem of frequent shedding of getter and getter powder in an arc extinguishing chamber with a long mechanical life in the prior art, and to provide a getter structure for a vacuum arc extinguishing chamber with a long mechanical life.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In the first aspect, the utility model provides a getter structure for a vacuum arc extinguishing chamber with a long mechanical life, comprising a getter matrix and a getter getter powder cake wrapped in the getter matrix; the getter matrix comprises a fixedly connected cavity and a fixed outer ring; the outer contour line of the fixed outer ring is circular; a plurality of holes are arranged on the wall surface of the cavity for the getter powder cake to contact with the external environment.

[0006] The utility model is further improved in that:

[0007] The cavity and the fixed outer ring are an integrally formed structure.

[0008] The cavity is a hollow cylindrical structure; a plurality of holes are arranged on the end surface of the cavity.

[0009] A plurality of holes are arranged on the circumferential wall surface of the cavity.

[0010] The shape of the holes is square, triangle, pentagon or honeycomb.

[0011] The getter matrix is ​​made of metal.

[0012] The getter matrix is ​​made of nickel and nickel alloy plate.

[0013] The getter powder cake is made of zirconium-aluminum powder alloy tablets or zirconium-vanadium-iron powder alloy tablets.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model discloses a getter structure for a vacuum arc extinguishing chamber with a long mechanical life. The fixed outer ring of the getter base is circular, so the spot welding outer contour of the getter base is circular, which can effectively reduce the stress generated during spot welding of the existing square outer contour getter, improve welding reliability, and solve the problem of the getter base falling off after multiple mechanical running-in in the vacuum arc extinguishing chamber with a long mechanical life. In addition, a plurality of holes are arranged on the cavity of the getter base to form a mesh structure, which ensures the good air suction characteristics of the getter powder cake, and effectively solves the problem of the getter powder cake falling off after multiple mechanical running-in in the vacuum arc extinguishing chamber with a long mechanical life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural diagram of the getter in the utility model;

[0018] Figure 2 It is a top view of the getter in Example 1 of the utility model;

[0019] Figure 3 It is a top view of the getter in Example 2 of the utility model;

[0020] Figure 4 This is a top view of the getter in Example 3 of the utility model;

[0021] Figure 5 This is a top view of the getter in Example 4 of the utility model.

[0022] Wherein: 1-getter matrix; 2-getter getter powder;. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] The utility model is further described in detail below with reference to the accompanying drawings:

[0030] Embodiment 1

[0031] See also Figure 1 and Figure 2 The embodiment of the utility model discloses a getter structure for a vacuum arc extinguishing chamber with a long mechanical life, comprising a getter matrix 1 and a getter powder cake 2 wrapped in the getter matrix 1; the getter matrix 1 comprises an integrally formed cavity and a fixed outer ring; the outer contour line of the fixed outer ring is circular and is fixed in the arc extinguishing chamber by welding; a plurality of holes are arranged on the wall surface of the cavity for the getter powder cake 2 to contact with the external environment. The cavity is a hollow cylindrical structure; a plurality of holes are arranged on the end surface of the cavity. A plurality of holes are arranged on the circumferential wall surface of the cavity or no holes are arranged to form a complete wall surface. The shape of the hole is square. The getter matrix 1 is made of metal, such as nickel and nickel alloy plate. The getter powder cake 2 is made of zirconium-aluminum powder alloy pressed tablets or zirconium-vanadium-iron powder alloy pressed tablets.

[0032] Embodiment 2

[0033] See also Figure 1 and Figure 3 The embodiment of the utility model discloses a getter structure for a vacuum arc extinguishing chamber with a long mechanical life, comprising a getter matrix 1 and a getter getter powder cake 2 wrapped in the getter matrix 1; the getter matrix 1 comprises an integrally formed cavity and a fixed outer ring; the outer contour line of the fixed outer ring is circular and is fixed in the arc extinguishing chamber by welding; a plurality of holes are arranged on the wall surface of the cavity for the getter getter powder cake 2 to contact with the external environment. The cavity is a hollow cylindrical structure; a plurality of holes are arranged on the end surface of the cavity. A plurality of holes are arranged on the circumferential wall surface of the cavity or no holes are arranged to form a complete wall surface. The getter matrix 1 is made of metal, such as nickel and nickel alloy plate. The getter getter powder cake 2 is made of zirconium-aluminum powder alloy pressed tablets or zirconium-vanadium-iron powder alloy pressed tablets.

[0034] The difference between this embodiment and the first embodiment is that the shape of the holes is a honeycomb shape, which provides a larger contact area between the getter powder cake 2 in the getter matrix 1 and the external space.

[0035] Embodiment 3

[0036] See also Figure 1 and Figure 4The embodiment of the utility model discloses a getter structure for a vacuum arc extinguishing chamber with a long mechanical life, comprising a getter matrix 1 and a getter getter powder cake 2 wrapped in the getter matrix 1; the getter matrix 1 comprises an integrally formed cavity and a fixed outer ring; the outer contour line of the fixed outer ring is circular and is fixed in the arc extinguishing chamber by welding; a plurality of holes are arranged on the wall surface of the cavity for the getter getter powder cake 2 to contact with the external environment. The cavity is a hollow cylindrical structure; a plurality of holes are arranged on the end surface of the cavity. A plurality of holes are arranged on the circumferential wall surface of the cavity or no holes are arranged to form a complete wall surface. The getter matrix 1 is made of metal, such as nickel and nickel alloy plate. The getter getter powder cake 2 is made of zirconium-aluminum powder alloy pressed tablets or zirconium-vanadium-iron powder alloy pressed tablets.

[0037] The difference between this embodiment and the first embodiment is that the shape of the hole is triangular, and the structure is more stable.

[0038] Embodiment 4

[0039] See also Figure 1 and Figure 5 The embodiment of the utility model discloses a getter structure for a vacuum arc extinguishing chamber with a long mechanical life, comprising a getter matrix 1 and a getter getter powder cake 2 wrapped in the getter matrix 1; the getter matrix 1 comprises an integrally formed cavity and a fixed outer ring; the outer contour line of the fixed outer ring is circular and is fixed in the arc extinguishing chamber by welding; a plurality of holes are arranged on the wall surface of the cavity for the getter getter powder cake 2 to contact with the external environment. The cavity is a hollow cylindrical structure; a plurality of holes are arranged on the end surface of the cavity. A plurality of holes are arranged on the circumferential wall surface of the cavity or no holes are arranged to form a complete wall surface. The getter matrix 1 is made of metal, such as nickel and nickel alloy plate. The getter getter powder cake 2 is made of zirconium-aluminum powder alloy pressed tablets or zirconium-vanadium-iron powder alloy pressed tablets.

[0040] The difference between this embodiment and the first embodiment is that the shape of the hole is a pentagon.

[0041] The shape of the hole in the present invention can be various shapes, forming different mesh structures on the wall surface of the cavity, and is not limited to the four shapes listed in the embodiment.

[0042] The utility model discloses a getter structure for a vacuum arc extinguishing chamber with a long mechanical life. The fixed outer ring of the getter base is circular, so the spot welding outer contour of the getter base is circular, which can effectively reduce the stress generated during spot welding of the existing square outer contour getter, improve welding reliability, and solve the problem of the getter base falling off after multiple mechanical running-in in the vacuum arc extinguishing chamber with a long mechanical life. In addition, a plurality of holes are arranged on the cavity of the getter base to form a mesh structure, which ensures the good air suction characteristics of the getter powder cake, and effectively solves the problem of the getter powder cake falling off after multiple mechanical running-in in the vacuum arc extinguishing chamber with a long mechanical life.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A getter structure for a vacuum interrupter with a long mechanical life, characterized in that: The invention comprises a getter matrix (1) and a getter powder cake (2) wrapped in the getter matrix (1); the getter matrix (1) comprises a cavity and a fixed outer ring which are fixedly connected; the outer contour line of the fixed outer ring is circular; a plurality of holes are arranged on the wall surface of the cavity for the getter powder cake (2) to contact with the external environment.

2. The getter structure for a vacuum interrupter with a long mechanical life according to claim 1, characterized in that: The cavity and the fixed outer ring are an integrally formed structure.

3. The getter structure for a vacuum interrupter with a long mechanical life according to claim 1, characterized in that: The cavity is a hollow cylindrical structure; a plurality of holes are arranged on the end surface of the cavity.

4. The getter structure for a vacuum interrupter with a long mechanical life according to claim 3, characterized in that: A plurality of holes are arranged on the circumferential wall surface of the cavity.

5. The getter structure for a vacuum interrupter with a long mechanical life according to claim 4, characterized in that: The shape of the holes is square, triangle, pentagon or honeycomb.

6. The getter structure for a vacuum interrupter with a long mechanical life according to claim 1, characterized in that: The getter matrix (1) is made of metal.

7. The getter structure for a vacuum interrupter with a long mechanical life according to claim 5, characterized in that: The getter matrix (1) is made of nickel and nickel alloy plate.

8. The getter structure for a vacuum interrupter with a long mechanical life according to claim 1, characterized in that: The getter powder cake (2) is made of zirconium-aluminum powder alloy tablets or zirconium-vanadium-iron powder alloy tablets.

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