Corrugated pipe structure for gas-insulated switchgear circuit breaker

Abstract

The invention discloses a corrugated pipe structure for a gas-insulated switchgear breaker, which is characterized in that the corrugated pipe structure comprises a corrugated pipe body, a through mounting cavity is arranged in the middle of the corrugated pipe body, and an end cover shaft is arranged on the mounting cavity in a penetrating manner; the mounting cavity is an integrated mounting cavity provided with a wide cavity and a narrow cavity which are connected with each other; the narrow portion of the end cover shaft is arranged in the narrow cavity, and the tail end of the narrow portion extends out of the first end face of the corrugated pipe body and is fixed to the first end face of the corrugated pipe body through a first end cover. The wide part of the end cover shaft is arranged in the wide cavity, and the tail end of the wide part extends out of the second end face of the corrugated pipe body and is fixed to the second end face of the corrugated pipe body through a second end cover; the width of the first end cover is larger than that of the corrugated pipe body, and the first end cover is provided with a sealing structure. The width of the first end cover is smaller than that of the corrugated pipe body; and a mounting thread groove is formed in the wide part of the end cover shaft. Through the structural improvement, the sealing performance of the corrugated pipe in the gas-insulated switchgear circuit breaker and the connection reliability of a main loop and a mechanism part are improved, and the sealing performance and the connection reliability are stably improved.

Description

Technical Field

[0001] The invention relates to the field of manufacturing circuit breakers for gas-filled cabinets, and in particular to a bellows structure for circuit breakers for gas-filled cabinets. Background Art

[0002] Gas-filled cabinet circuit breakers are important switchgear in power systems, and the stability and reliability of their sealing performance are crucial to the safe operation of power systems. As an important component of gas-filled cabinet circuit breakers, bellows are mainly used to connect the circuit breaker mechanism and the main circuit, playing a sealing and connecting role.

[0003] Gas-filled cabinet circuit breaker is a kind of high-voltage switchgear which is efficient, reliable and suitable for various environments and is widely used in power systems.

[0004] How to improve the reliability and service life of bellows seals through structural improvements is a problem that needs to be solved. Summary of the invention

[0005] In order to overcome the above defects of the prior art, the purpose of the present invention is to provide a bellows structure for a gas cabinet circuit breaker. The structural improvement of the present invention can improve the sealing performance of the bellows in the gas cabinet circuit breaker and the connection reliability between the main circuit and the mechanism part.

[0006] In order to achieve the purpose of the present invention, the technical solution adopted is:

[0007] A bellows structure for a gas cabinet circuit breaker, comprising:

[0008] A bellows body, wherein a through-going installation cavity is provided in the middle of the bellows body, and an end cap shaft is provided through the installation cavity;

[0009] The installation cavity is an integrated installation cavity provided with a wide cavity and a narrow cavity connected to each other;

[0010] The narrow portion of the end cover shaft is arranged in the narrow cavity, and the end of the narrow portion extends out of the first end surface of the bellows body and is fixed to the first end surface of the bellows body through the first end cover;

[0011] The wide portion of the end cover shaft is arranged in the wide cavity, and the end of the wide portion extends out of the second end surface of the bellows body and is fixed to the second end surface of the bellows body through the second end cover;

[0012] The width of the first end cover is greater than the width of the corrugated pipe body and is provided with a sealing structure;

[0013] The width of the first end cover is smaller than the width of the corrugated tube body;

[0014] A mounting thread groove is arranged in the wide portion of the end cover shaft.

[0015] In a preferred embodiment of the present invention, the first end cover is provided with a sealing structure installation groove, and the sealing structure is arranged in the sealing structure installation groove.

[0016] In a preferred embodiment of the present invention, the first end cover or the second end cover is made of stainless steel.

[0017] In a preferred embodiment of the present invention, the first end cover or the second end cover is made of 304 stainless steel.

[0018] In a preferred embodiment of the present invention, the end cover shaft is made of stainless steel.

[0019] In a preferred embodiment of the present invention, the end cover shaft is made of 304 stainless steel.

[0020] In a preferred embodiment of the present invention, the bellows body is made of stainless steel.

[0021] In a preferred embodiment of the present invention, the bellows body is made of 316L stainless steel.

[0022] In a preferred embodiment of the present invention, the sealing structure is a sealing ring of EPDM rubber.

[0023] The beneficial effects of the present invention are:

[0024] The structural improvement of the present invention improves the sealing performance of the bellows in the gas cabinet circuit breaker and the connection reliability between the main circuit and the mechanism part, thereby stably increasing the sealing performance and the connection reliability performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure of the present invention is schematically shown Figure 1 .

[0026] Figure 2 The structure of the present invention is schematically shown Figure 2 .

[0027] Figure 3 It is the installation schematic diagram of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following structure, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] like Figure 1-3 The bellows structure for a gas cabinet circuit breaker shown includes a bellows body 2 made of stainless steel. The bellows body 2 in the embodiment is made of 316L stainless steel and is continuously welded to connect the end covers.

[0031] A penetrating installation cavity 21 is arranged in the middle of the corrugated tube body 2 , and an end cover shaft 4 is arranged penetratingly on the installation cavity 21 . The installation cavity 21 is an integrated installation cavity provided with a wide cavity 211 and a narrow cavity 212 connected to each other.

[0032] The narrow portion 41 of the end cover shaft 4 is disposed in the narrow cavity 212 , and the end of the narrow portion 41 extends out of the first end surface of the bellows body 2 and is fixed to the first end surface of the bellows body 2 through the first end cover 1 .

[0033] The wide portion 42 of the end cover shaft 4 is disposed in the wide cavity 211 , and the end of the wide portion 42 extends out of the second end surface of the bellows body 2 and is fixed to the second end surface of the bellows body 2 through the second end cover 3 .

[0034] The width of the first end cover 1 is greater than the width of the corrugated pipe body 2 and is provided with a sealing structure 5 . The width of the first end cover 1 is less than the width of the corrugated pipe body 2 .

[0035] A mounting thread groove 421 is provided in the wide portion 42 of the end cover shaft 4 .

[0036] The end cover shaft 4 is made of 304 stainless steel and is continuously welded for connection with the main circuit part.

[0037] The first end cover 1 is made of 304 stainless steel material, is used to install the sealing ring, and is continuously welded to one end of the bellows.

[0038] Specifically, the first end cover 1 is provided with a sealing structure installation groove 11, and a sealing structure 5 is arranged in the sealing structure installation groove 11. The sealing structure 5 is a sealing ring of EPDM rubber. The sealing structure cooperates with the sealing surface of the sealing aluminum plate to play a sealing role.

[0039] The second end cover 3 is made of 304 stainless steel material and is continuously welded to connect the end cover shaft and the other end of the bellows.

[0040] Because of the above structure, the working principle of the present invention is:

[0041] The main circuit part 100 and the aluminum plate 200 are first fixed to the circuit breaker mechanism part (chassis) 300 by screws, and then the bellows structure of the inflatable cabinet circuit breaker with the sealing ring 5 installed is connected to the main circuit part (insulating pull rod) 110 by threads, and then the flange 120 is used to fix the bellows structure of the inflatable cabinet circuit breaker.

[0042] The structural improvement of the present invention improves the sealing performance of the bellows in the gas cabinet circuit breaker and the connection reliability between the main circuit and the mechanism part, thereby stably increasing the sealing performance and the connection reliability performance.

[0043] The basic principles and main features of the invention and the advantages of the invention are shown and described above.

[0044] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A bellows structure for a gas cabinet circuit breaker, characterized in that: include: A bellows body, wherein a through-going installation cavity is provided in the middle of the bellows body, and an end cap shaft is provided through the installation cavity; The installation cavity is an integrated installation cavity provided with a wide cavity and a narrow cavity connected to each other; The narrow portion of the end cover shaft is arranged in the narrow cavity, and the end of the narrow portion extends out of the first end surface of the bellows body and is fixed to the first end surface of the bellows body through the first end cover; The wide portion of the end cover shaft is arranged in the wide cavity, and the end of the wide portion extends out of the second end surface of the bellows body and is fixed to the second end surface of the bellows body through the second end cover; The width of the first end cover is greater than the width of the corrugated pipe body and is provided with a sealing structure; The width of the first end cover is smaller than the width of the corrugated tube body; A mounting thread groove is arranged in the wide portion of the end cover shaft.

2. A bellows structure for a gas cabinet circuit breaker according to claim 1, characterized in that: The first end cover is provided with a sealing structure installation groove, and the sealing structure is arranged in the sealing structure installation groove.

3. A bellows structure for a gas cabinet circuit breaker according to claim 1, characterized in that: The first end cover or the second end cover is made of stainless steel.

4. A bellows structure for a gas cabinet circuit breaker as claimed in claim 3, characterized in that: The first end cover or the second end cover is made of 304 stainless steel.

5. The bellows structure for a gas cabinet circuit breaker according to claim 1, characterized in that: The end cover shaft is made of stainless steel.

6. A bellows structure for a gas cabinet circuit breaker as claimed in claim 5, characterized in that: The end cover shaft is made of 304 stainless steel.

7. A bellows structure for a gas cabinet circuit breaker according to claim 1, characterized in that: The bellows body is made of stainless steel.

8. A bellows structure for a gas cabinet circuit breaker as claimed in claim 7, characterized in that: The bellows body is made of 316L stainless steel.

9. The bellows structure for a gas cabinet circuit breaker according to claim 1, characterized in that: The sealing structure is a sealing ring of EPDM rubber.

Images