Corrugated pipe for vacuum arc-extinguishing chamber

Abstract

The invention discloses a corrugated pipe for a vacuum arc-extinguishing chamber, and the corrugated pipe comprises a corrugated pipe body, the corrugated pipe body comprises a middle corrugated pipe section, a first end corrugated pipe section and a second end corrugated pipe section, the first end corrugated pipe section and the second end corrugated pipe section are located at the two ends of the middle corrugated pipe section respectively, and the inner diameters of the middle corrugated pipe section, the first end corrugated pipe section and the second end corrugated pipe section are equal. The diameters of all wave crests on the middle corrugated pipe section are equal, the first end corrugated pipe section and the second end corrugated pipe section are each of a tower-shaped structure, and the diameter of the wave crest of the first end corrugated pipe section is gradually decreased from the end, close to the middle corrugated pipe section, of the first end corrugated pipe section to the end, away from the middle corrugated pipe section, of the first end corrugated pipe section. The wave crest diameter of the second end corrugated pipe section is gradually decreased from the end, close to the middle corrugated pipe section, of the second end corrugated pipe section to the end, away from the middle corrugated pipe section, of the second end corrugated pipe section. The fatigue life of the corrugated pipe can be effectively prolonged, and then the mechanical life of a power transmission grade vacuum arc-extinguishing chamber is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum interrupter chambers, and in particular to a bellows for vacuum interrupter chambers. Background Art

[0002] With the continuous development of the power industry and the improvement of environmental protection requirements, vacuum interrupters are developing towards high-voltage power transmission and distribution, and the switchgear used in vacuum interrupters is also developing towards high voltage. Therefore, improving the mechanical life of transmission-level vacuum interrupters is of paramount importance.

[0003] At present, conventional bellows usually adopt cylindrical structure (such as Figure 3 As shown in the figure, the outer diameter and inner diameter of each wave are consistent, and the stiffness of each wave is the same, which leads to excessive compression of the first few waves in the high-speed motion state during movement, thereby affecting the life of the bellows. To this end, the present invention proposes a bellows for a vacuum interrupter. Summary of the invention

[0004] The embodiment of the present application provides a bellows for a vacuum interrupter, which can effectively improve the fatigue life of the bellows, thereby improving the mechanical life of the transmission-grade vacuum interrupter.

[0005] In view of this, the present application provides a bellows for a vacuum interrupter, comprising: a bellows body;

[0006] The bellows body comprises a middle bellows section, a first end bellows section and a second end bellows section;

[0007] The first end bellows section and the second end bellows section are respectively located at two ends of the middle bellows section;

[0008] The inner diameters of the middle bellows section, the first end bellows section and the second end bellows section are equal;

[0009] The diameters of the wave crests on the middle corrugated pipe section are all equal;

[0010] The first end bellows section and the second end bellows section are both tower-shaped structures;

[0011] The crest diameter of the first end bellows section gradually decreases from one end of the first end bellows section close to the middle bellows section to one end of the first end bellows section away from the middle bellows section;

[0012] The crest diameter of the second end bellows section gradually decreases from one end of the second end bellows section close to the middle bellows section to one end of the second end bellows section away from the middle bellows section.

[0013] Optionally, the maximum wave peak diameters of the first end bellows segment and the second end bellows segment are both smaller than or equal to the wave peak diameter of the middle bellows segment.

[0014] Optionally, the distance between adjacent wave crests on the middle bellows segment, the distance between adjacent wave crests on the first end bellows segment, and the distance between adjacent wave crests on the second end bellows segment are all equal.

[0015] Optionally, the number of wave peaks of the first end bellows section is equal to the number of wave peaks of the second end bellows section.

[0016] Optionally, the number of wave peaks of the first end bellows section and the number of wave peaks of the second end bellows section are both at least two.

[0017] Optionally, a diameter difference between two adjacent wave crests on the first end bellows section and a diameter difference between two adjacent wave crests on the second end bellows section are both 1 mm.

[0018] Optionally, the middle bellows section, the first end bellows section and the second end bellows section are integrally formed.

[0019] Optionally, the material of the bellows body is 316L stainless steel.

[0020] It can be seen from the above technical scheme that the embodiments of the present application have the following advantages: the overall structure of the bellows for the vacuum arc extinguishing chamber is simple, and an intermediate bellows section, a first end bellows section and a second end bellows section are provided, wherein the inner diameters of the intermediate bellows section, the first end bellows section and the second end bellows section are equal, the diameters of the wave peaks on the intermediate bellows section are equal, and the first end bellows section and the second end bellows section are both tower-shaped structures with gradually decreasing wave peak diameters, thereby improving the stiffness distribution of the bellows. Since the first end bellows section and the second end bellows section are designed as tower-shaped structures, the outer diameter (wave peak diameter) gradually decreases, while the inner diameter remains unchanged, thereby increasing the stiffness of the first few waves at both ends of the bellows, effectively preventing the first few waves of the bellows from being over-compressed, and improving the uniformity of wave-to-wave compression of the bellows during high-speed movement, thereby improving the fatigue life of the bellows. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the bellows used in the vacuum interrupter in the embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of the structure of the first end bellows section in the embodiment of the present application;

[0023] Figure 3 It is a structural schematic diagram of a bellows in the prior art;

[0024] Wherein, the accompanying drawings are marked as follows:

[0025] 1-middle bellows section, 2-first end bellows section, 3-second end bellows section. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an indirect connection 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 this application can be understood according to specific circumstances.

[0029] The present application provides an embodiment of a bellows for a vacuum interrupter. Figure 1 and Figure 2 .

[0030] The vacuum arc extinguishing chamber bellows in the present embodiment comprises: a bellows body, the bellows body comprises an intermediate bellows section 1, a first end bellows section 2 and a second end bellows section 3, the first end bellows section 2 and the second end bellows section 3 are respectively located at two ends of the intermediate bellows section 1, the inner diameters of the intermediate bellows section 1, the first end bellows section 2 and the second end bellows section 3 are equal, the diameters of the wave peaks on the intermediate bellows section 1 are equal, the first end bellows section 2 and the second end bellows section 3 are both tower-shaped structures, the wave peak diameter of the first end bellows section 2 gradually decreases from one end of the first end bellows section 2 close to the intermediate bellows section 1 to one end of the first end bellows section 2 far away from the intermediate bellows section 1; the wave peak diameter of the second end bellows section 3 gradually decreases from one end of the second end bellows section 3 close to the intermediate bellows section 1 to one end of the second end bellows section 3 far away from the intermediate bellows section 1.

[0031] It should be noted that: the overall structure of the bellows for the vacuum arc extinguishing chamber is simple, and an intermediate bellows section 1, a first end bellows section 2 and a second end bellows section 3 are provided, wherein the inner diameters of the intermediate bellows section 1, the first end bellows section 2 and the second end bellows section 3 are equal, the diameters of the wave peaks on the intermediate bellows section 1 are equal, the first end bellows section 2 and the second end bellows section 3 are both tower-shaped structures with gradually decreasing wave peak diameters, thereby improving the stiffness distribution of the bellows. Since the first end bellows section 2 and the second end bellows section 3 are designed as tower-shaped structures, the outer diameter (wave peak diameter) gradually decreases, while the inner diameter remains unchanged, thereby increasing the stiffness of the first few waves at both ends of the bellows, effectively preventing the first few waves of the bellows from being over-compressed, and improving the uniformity of wave-to-wave compression of the bellows during high-speed movement, thereby improving the fatigue life of the bellows.

[0032] The above is an embodiment of a bellows for a vacuum interrupter provided in the embodiment of the present application. The following is an embodiment of a bellows for a vacuum interrupter provided in the embodiment of the present application. For details, please refer to Figure 1 and Figure 2 .

[0033] The vacuum interrupter bellows in this embodiment comprises: a bellows body, the bellows body comprises a middle bellows section 1, a first end bellows section 2 and a second end bellows section 3, the first end bellows section 2 and the second end bellows section 3 are respectively located at two ends of the middle bellows section 1, the middle bellows section 1, the first end bellows section 2 and the second end bellows section 3 have the same inner diameter (that is, the diameters of the troughs on the middle bellows section 1, the first end bellows section 2 and the second end bellows section 3 are all the same), and the middle bellows section 1 is provided with a first bellows section 2 and a second bellows section 3. The diameters of the wave peaks on the bellows section 1 are all equal, the first end bellows section 2 and the second end bellows section 3 are both tower-shaped structures, the wave peak diameter of the first end bellows section 2 gradually decreases from one end of the first end bellows section 2 close to the middle bellows section 1 to one end of the first end bellows section 2 far away from the middle bellows section 1; the wave peak diameter of the second end bellows section 3 gradually decreases from one end of the second end bellows section 3 close to the middle bellows section 1 to one end of the second end bellows section 3 far away from the middle bellows section 1.

[0034] It can be understood that the present invention designs the two ends of the bellows into a tower-shaped structure, reduces the outer diameter of the first wave (peak diameter), and then increases the diameter of each wave successively. Since the outer diameter at both ends of the bellows is reduced while the inner diameter remains unchanged, the stiffness of the first few waves at both ends is increased, which can effectively prevent the first few waves of the bellows from being over-compressed, improve the uniformity of compression between waves of the bellows when the bellows moves at high speed, and thus improve the fatigue life of the bellows.

[0035] Specifically, the maximum wave crest diameters of the first end bellows section 2 and the second end bellows section 3 are both smaller than or equal to the wave crest diameter of the middle bellows section 1 .

[0036] The distance between adjacent wave crests on the middle bellows section 1, the distance between adjacent wave crests on the first end bellows section 2, and the distance between adjacent wave crests on the second end bellows section 3 are all equal.

[0037] The number of wave peaks of the first end bellows section 2 is equal to the number of wave peaks of the second end bellows section 3 .

[0038] The number of wave peaks of the first end bellows section 2 and the number of wave peaks of the second end bellows section 3 are both at least two.

[0039] The diameter difference between two adjacent wave crests on the first end bellows section 2 and the diameter difference between two adjacent wave crests on the second end bellows section 3 are both 1 mm.

[0040] The middle bellows section 1, the first end bellows section 2 and the second end bellows section 3 are integrally formed.

[0041] The material of the bellows body can be 316L stainless steel.

[0042] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A bellows for a vacuum interrupter, characterized in that: include: Bellows body; The bellows body comprises a middle bellows section, a first end bellows section and a second end bellows section; The first end bellows section and the second end bellows section are respectively located at two ends of the middle bellows section; The inner diameters of the middle bellows section, the first end bellows section and the second end bellows section are equal; The diameters of the wave crests on the middle corrugated pipe section are all equal; The first end bellows section and the second end bellows section are both tower-shaped structures; The crest diameter of the first end bellows section gradually decreases from one end of the first end bellows section close to the middle bellows section to one end of the first end bellows section away from the middle bellows section; The crest diameter of the second end bellows section gradually decreases from one end of the second end bellows section close to the middle bellows section to one end of the second end bellows section away from the middle bellows section.

2. The vacuum interrupter bellows according to claim 1, characterized in that: The maximum wave crest diameters of the first end bellows section and the second end bellows section are both smaller than or equal to the wave crest diameter of the middle bellows section.

3. The vacuum interrupter bellows according to claim 1, characterized in that: The distance between adjacent wave crests on the middle bellows section, the distance between adjacent wave crests on the first end bellows section, and the distance between adjacent wave crests on the second end bellows section are all equal.

4. The vacuum interrupter bellows according to claim 1, characterized in that: The number of wave peaks of the first end bellows section is equal to the number of wave peaks of the second end bellows section.

5. The vacuum interrupter bellows according to claim 1, characterized in that: The number of wave peaks of the first end bellows section and the number of wave peaks of the second end bellows section are both at least two.

6. The vacuum interrupter bellows according to claim 1, characterized in that: The diameter difference between two adjacent wave crests on the first end portion of the corrugated tube section and the diameter difference between two adjacent wave crests on the second end portion of the corrugated tube section are both 1 mm.

7. The bellows for vacuum interrupter according to claim 1, characterized in that: The middle bellows section, the first end bellows section and the second end bellows section are integrally formed.

8. The vacuum interrupter bellows according to claim 1, characterized in that: The material of the bellows body is 316L stainless steel.

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