CN111986950A - Bellows subassembly, vacuum interrupter and vacuum circuit breaker for vacuum interrupter - Google Patents
Bellows subassembly, vacuum interrupter and vacuum circuit breaker for vacuum interrupter Download PDFInfo
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- CN111986950A CN111986950A CN202010652470.1A CN202010652470A CN111986950A CN 111986950 A CN111986950 A CN 111986950A CN 202010652470 A CN202010652470 A CN 202010652470A CN 111986950 A CN111986950 A CN 111986950A
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- corrugated pipe
- flange
- main body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66238—Specific bellows details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
- H01H2033/66215—Details relating to the soldering or brazing of vacuum switch housings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
- H01H2033/66223—Details relating to the sealing of vacuum switch housings
Abstract
The invention relates to the technical field of corrugated pipes, in particular to a corrugated pipe assembly for a vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber and a vacuum circuit breaker. The bellows assembly includes: the corrugated pipe comprises a corrugated pipe body and a corrugated pipe body, wherein the corrugated pipe body is of a multilayer structure formed by more than two layers of pipe bodies; straight edge parts are respectively arranged at two axial ends of the corrugated pipe main body, and the straight edge parts are integrally formed by connecting all layers of pipe bodies of the corrugated pipe main body through roll welding; the flanges are arranged at the two axial ends of the corrugated pipe main body; a first welding part formed by the outer peripheral surface of the straight edge part, wherein the first welding part is fixedly connected and sealed with the inner side end surface of the flange through a first annular welding line; and the second welding part is formed by the end surface of the corrugated pipe main body, and the second welding part is fixedly connected and sealed with the inner wall of the flange through a second annular welding line. The corrugated pipe assembly is structurally designed, and reliable application of the corrugated pipe assembly on a vacuum arc extinguish chamber of a high-voltage circuit breaker can be guaranteed.
Description
Technical Field
The invention relates to the technical field of corrugated pipes, in particular to a corrugated pipe assembly for a vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber and a vacuum circuit breaker.
Background
In foreign countries, vacuum circuit breakers have become the leading product in the medium voltage field, mainly for the following reasons: firstly, with the progress of the vacuum circuit breaker technology, special types such as a high-voltage type, a high-current type, a frequently-operated type, an undervoltage overvoltage type and an economic type are developed, the requirements of different on-off tasks can be met, a fully-selected space is provided for a user, and the vacuum circuit breaker is favored by the user; secondly, functionally, the vacuum circuit breaker is developed into a multifunctional type from the original single function, namely, the functions of isolation, grounding and the like are added besides the original on-off function, so that the overall structure of the switch is greatly simplified; in addition, the vacuum circuit breaker uses an environmental gas as an insulating medium, such as N2、C02Etc. belonging to the environment-friendly switch, and SF6Compared with a vacuum circuit breaker, the vacuum circuit breaker does not use SF6Gas, and thus no factor SF6The problem of greenhouse effect caused by gas leakage also visually promotes the development of the vacuum circuit breaker.
The vacuum arc-extinguishing chamber is an important part of the vacuum circuit breaker, the production experience of the vacuum arc-extinguishing chamber has been known in China for many years, and through years of development, absorption and digestion, popularization and application and the like, a mature manufacturing process system is formed, the quality and the reliability of the vacuum arc-extinguishing chamber for the medium-low voltage vacuum circuit breaker of 40.5kV or below are greatly improved, and the use requirement of the vacuum circuit breaker can be basically met.
Specifically, as shown in fig. 1, the vacuum interrupter for the medium and low voltage vacuum circuit breaker includes a housing 100, a movable cover plate 200 and a stationary cover plate 300 are respectively disposed at two ends of the housing 100, a stationary contact 500 is fixed on the stationary cover plate 300, a through hole is disposed on the movable cover plate 200, one end of a movable conducting rod 400 extends into the housing 100 through the through hole and is fixed with a movable contact 700, a bellows 600 is sleeved on the movable conducting rod 400, and two ends of the bellows 600 are fixed on the movable cover plate 200 and the movable conducting rod 400 through vacuum brazing. In the prior art, the corrugated pipe is fixed on the vacuum arc-extinguishing chamber in another connection mode, a transition flange is needed in the connection mode, and the transition flange, the corrugated pipe and the arc-extinguishing chamber are connected together through vacuum brazing.
As sealing and connecting elements in vacuum interrupters, the bellows plays a vital role in vacuum interrupters. In the existing vacuum arc-extinguishing chamber, the single-layer corrugated pipe shown in fig. 1 is mostly adopted, and when the high-voltage circuit breaker adopts the vacuum arc-extinguishing chamber as a breaking unit in the environment-friendly development process, because the pressure of an external insulating medium is higher, the breaking speed and the breaking stroke of the circuit breaker are larger, so that higher requirements on the strength and the service life of the corrugated pipe of the vacuum arc-extinguishing chamber are provided.
Disclosure of Invention
The invention aims to provide a corrugated pipe assembly to meet the use requirement of a corrugated pipe when a vacuum arc-extinguishing chamber is applied to a high-voltage circuit breaker; the invention also aims to provide a vacuum arc-extinguishing chamber so as to meet the use requirement of the vacuum arc-extinguishing chamber applied to a high-voltage circuit breaker; the invention also aims to provide an environment-friendly vacuum circuit breaker capable of switching on and off high voltage.
In order to achieve the purpose, the technical scheme of the bellows assembly for the vacuum arc-extinguishing chamber is as follows:
a bellows assembly for a vacuum interrupter includes:
the corrugated pipe comprises a corrugated pipe main body, a corrugated pipe body and a corrugated pipe body, wherein the corrugated pipe main body is of a multilayer structure formed by more than two layers of pipe bodies; straight edge parts are arranged at two axial ends of the corrugated pipe main body, and the straight edge parts are integrally formed by connecting all layers of pipe bodies of the corrugated pipe main body through roll welding;
the flanges are arranged at the two axial ends of the corrugated pipe main body, and each flange is provided with an inner side end face facing to the other flange and an outer side end face back to the other flange;
the first welding part is formed by the outer peripheral surface of the straight edge part, and is fixedly connected and sealed with the inner side end face of the flange through a first annular welding line;
and the second welding part is formed by the end face of the corrugated pipe main body, and is fixedly connected and sealed with the inner wall of the flange through a second annular welding line.
The invention has the beneficial effects that: firstly, the corrugated pipe main body is of a multilayer structure, and the multilayer structure is beneficial to improving the toughness and fatigue resistance of the corrugated pipe main body; secondly, the straight edge part connects all layers of pipe bodies into a whole, so that not only is the sealing performance between all layers of pipe bodies ensured, but also the straight edge part is large in thickness, the straight edge part and the inner side end face of the flange can be welded and fixed under the condition that the pipe bodies cannot be welded through, and conditions are provided for two annular welding seams between the corrugated pipe main body and the flange; and thirdly, the corrugated pipe main body is fixedly connected with the flange through two annular welding seams, so that the connection stability of the corrugated pipe main body and the flange and the sealing performance of the joint of the corrugated pipe main body and the flange can be effectively ensured.
In conclusion, the structural strength of the corrugated pipe assembly can be effectively ensured by the design of the multilayer structure and the two annular welding lines, so that the corrugated pipe assembly can meet the use requirements of a vacuum circuit breaker on large breaking speed and large breaking stroke when being applied to a vacuum arc-extinguishing chamber; and the straight flange part and the design of two annular welding seams can effectively guarantee the sealing performance of the corrugated pipe assembly at each position, and avoid the phenomenon of air leakage caused by overhigh medium pressure when the corrugated pipe assembly is applied to a vacuum arc-extinguishing chamber, thereby guaranteeing the use reliability of the corrugated pipe assembly on the vacuum arc-extinguishing chamber of the high-voltage circuit breaker.
As a preferred technical solution, the bellows assembly further includes a third weld formed by the straight edge portion; the third weld is disposed between the first weld and the second weld;
the flange comprises a connecting plate body and a cylindrical neck part, and the cylindrical neck part protrudes towards one side of the connecting plate body;
the third welding part and the cylindrical neck part are fixed through seam welding.
Has the advantages that: on the basis that bellows main part and flange pass through two circular weld fixed connection, the tube-shape neck seam welding of third weld part and flange is fixed, has further increased the area of being connected of bellows main part and flange, is favorable to further improving the structural strength of bellows subassembly, makes the better operation requirement of satisfying it on high voltage circuit breaker's vacuum interrupter of bellows subassembly.
Preferably, the end portions of the bellows body are all straight-edge portions.
Has the advantages that: on one hand, the second welding part is also formed by the straight edge part, and all layers of pipe bodies of the straight edge part are connected into a whole, so that the second welding part and the flange can be conveniently welded and fixed; on the other hand, on the vacuum interrupter of bellows subassembly was applied to the circuit breaker, when the circuit breaker opened, power can be transmitted between bellows main part tip and flange, establishes the tip of bellows main part into the straight flange part entirely, is favorable to sharing the power of transmitting to bellows main part tip through whole straight flange part for the power transmission effect of bellows subassembly is better.
Preferably, the second annular weld is an angle weld.
Has the advantages that: the corrugated pipe main body and the inner wall of the flange can be conveniently welded.
In order to realize the purpose, the technical scheme of the vacuum arc-extinguishing chamber is as follows:
the vacuum interrupter includes: a housing;
the movable conducting rod is movably assembled on the shell in a guiding way;
the vacuum interrupter still includes:
one end of the corrugated pipe assembly is fixed on the movable conducting rod, and the other end of the corrugated pipe assembly is fixed on the shell;
the bellows assembly includes:
the corrugated pipe comprises a corrugated pipe main body, a corrugated pipe body and a corrugated pipe body, wherein the corrugated pipe main body is of a multilayer structure formed by more than two layers of pipe bodies; straight edge parts are arranged at two axial ends of the corrugated pipe main body, and the straight edge parts are integrally formed by connecting all layers of pipe bodies of the corrugated pipe main body through roll welding;
the flanges are arranged at the two axial ends of the corrugated pipe main body, and each flange is provided with an inner side end face facing to the other flange and an outer side end face back to the other flange;
the first welding part is formed by the outer peripheral surface of the straight edge part, and is fixedly connected and sealed with the inner side end face of the flange through a first annular welding line;
and the second welding part is formed by the end face of the corrugated pipe main body, and is fixedly connected and sealed with the inner wall of the flange through a second annular welding line.
The invention has the beneficial effects that: firstly, the corrugated pipe main body is of a multilayer structure, and the multilayer structure is beneficial to improving the toughness and fatigue resistance of the corrugated pipe main body; secondly, the straight edge part connects all layers of pipe bodies into a whole, so that not only is the sealing performance between all layers of pipe bodies ensured, but also the straight edge part is large in thickness, the straight edge part and the inner side end face of the flange can be welded and fixed under the condition that the pipe bodies cannot be welded through, and conditions are provided for two annular welding seams between the corrugated pipe main body and the flange; and thirdly, the corrugated pipe main body is fixedly connected with the flange through two annular welding seams, so that the connection stability of the corrugated pipe main body and the flange and the sealing performance of the joint of the corrugated pipe main body and the flange can be effectively ensured.
In conclusion, the structural strength of the corrugated pipe assembly can be effectively ensured by the design of the multilayer structure and the two annular welding lines, so that the corrugated pipe assembly can meet the use requirements of a vacuum circuit breaker on large breaking speed and large breaking stroke when being applied to a vacuum arc-extinguishing chamber; and the straight flange part and the design of two annular welding seams can effectively guarantee the sealing performance of the corrugated pipe assembly at each position, and avoid the phenomenon of air leakage caused by overhigh medium pressure when the corrugated pipe assembly is applied to a vacuum arc-extinguishing chamber, thereby guaranteeing the reliability of the vacuum arc-extinguishing chamber when the vacuum arc-extinguishing chamber is applied to a high-voltage circuit breaker.
As a preferred technical solution, the bellows assembly further includes a third weld formed by the straight edge portion; the third weld is disposed between the first weld and the second weld;
the flange comprises a connecting plate body and a cylindrical neck part, and the cylindrical neck part protrudes towards one side of the connecting plate body;
the third welding part and the cylindrical neck part are fixed through seam welding.
Has the advantages that: on the basis that bellows main part and flange pass through two circular weld fixed connection, the tube-shape neck seam welding of third weld part and flange is fixed, has further increased the area of being connected of bellows main part and flange, is favorable to further improving the structural strength of bellows subassembly, makes the better operation requirement of satisfying it on high voltage circuit breaker's vacuum interrupter of bellows subassembly.
Preferably, the end portions of the bellows body are all straight-edge portions.
Has the advantages that: on one hand, the second welding part is also formed by the straight edge part, and all layers of pipe bodies of the straight edge part are connected into a whole, so that the second welding part and the flange can be conveniently welded and fixed; on the other hand, on the vacuum interrupter of bellows subassembly was applied to the circuit breaker, when the circuit breaker opened, power can be transmitted between bellows main part tip and flange, establishes the tip of bellows main part into the straight flange part entirely, is favorable to sharing the power of transmitting to bellows main part tip through whole straight flange part for the power transmission effect of bellows subassembly is better.
Preferably, the second annular weld is an angle weld.
Has the advantages that: the corrugated pipe main body and the inner wall of the flange can be conveniently welded.
In order to achieve the purpose, the technical scheme of the vacuum circuit breaker is as follows:
the vacuum circuit breaker includes: a vacuum arc-extinguishing chamber;
the operating mechanism is in transmission connection with the vacuum arc extinguish chamber;
the vacuum interrupter includes: a housing;
the movable conducting rod is movably assembled on the shell in a guiding way;
the vacuum interrupter still includes:
one end of the corrugated pipe assembly is fixed on the movable conducting rod, and the other end of the corrugated pipe assembly is fixed on the shell;
the bellows assembly includes:
the corrugated pipe comprises a corrugated pipe main body, a corrugated pipe body and a corrugated pipe body, wherein the corrugated pipe main body is of a multilayer structure formed by more than two layers of pipe bodies; straight edge parts are arranged at two axial ends of the corrugated pipe main body, and the straight edge parts are integrally formed by connecting all layers of pipe bodies of the corrugated pipe main body through roll welding;
the flanges are arranged at the two axial ends of the corrugated pipe main body, and each flange is provided with an inner side end face facing to the other flange and an outer side end face back to the other flange;
the first welding part is formed by the outer peripheral surface of the straight edge part, and is fixedly connected and sealed with the inner side end face of the flange through a first annular welding line;
and the second welding part is formed by the end face of the corrugated pipe main body, and is fixedly connected and sealed with the inner wall of the flange through a second annular welding line.
The invention has the beneficial effects that: firstly, the corrugated pipe main body is of a multilayer structure, and the multilayer structure is beneficial to improving the toughness and fatigue resistance of the corrugated pipe main body; secondly, the straight edge part connects all layers of pipe bodies into a whole, so that not only is the sealing performance between all layers of pipe bodies ensured, but also the straight edge part is large in thickness, the straight edge part and the inner side end face of the flange can be welded and fixed under the condition that the pipe bodies cannot be welded through, and conditions are provided for two annular welding seams between the corrugated pipe main body and the flange; and thirdly, the corrugated pipe main body is fixedly connected with the flange through two annular welding seams, so that the connection stability of the corrugated pipe main body and the flange and the sealing performance of the joint of the corrugated pipe main body and the flange can be effectively ensured.
In conclusion, the structural strength of the corrugated pipe assembly can be effectively ensured by the design of the multilayer structure and the two annular welding lines, so that the corrugated pipe assembly can meet the use requirements of a vacuum circuit breaker on large breaking speed and large breaking stroke when being applied to a vacuum arc-extinguishing chamber; and the straight flange part and the design of two annular welding seams can effectively guarantee the sealing performance of the corrugated pipe assembly everywhere, and avoid the phenomenon of air leakage caused by overhigh medium pressure when the corrugated pipe assembly is applied to a vacuum arc-extinguishing chamber, thereby guaranteeing the reliability of the vacuum arc-extinguishing chamber when applied to a high-voltage circuit breaker and enabling the high-voltage circuit breaker to reliably cut off high voltage.
As a preferred technical solution, the bellows assembly further includes a third weld formed by the straight edge portion; the third weld is disposed between the first weld and the second weld;
the flange comprises a connecting plate body and a cylindrical neck part, and the cylindrical neck part protrudes towards one side of the connecting plate body;
the third welding part and the cylindrical neck part are fixed through seam welding.
Has the advantages that: on the basis that bellows main part and flange pass through two circular weld fixed connection, the tube-shape neck seam welding of third weld part and flange is fixed, has further increased the area of being connected of bellows main part and flange, is favorable to further improving the structural strength of bellows subassembly, makes the better operation requirement of satisfying it on high voltage circuit breaker's vacuum interrupter of bellows subassembly.
Preferably, the end portions of the bellows body are all straight-edge portions.
Has the advantages that: on one hand, the second welding part is also formed by the straight edge part, and all layers of pipe bodies of the straight edge part are connected into a whole, so that the second welding part and the flange can be conveniently welded and fixed; on the other hand, on the vacuum interrupter of bellows subassembly was applied to the circuit breaker, when the circuit breaker opened, power can be transmitted between bellows main part tip and flange, establishes the tip of bellows main part into the straight flange part entirely, is favorable to sharing the power of transmitting to bellows main part tip through whole straight flange part for the power transmission effect of bellows subassembly is better.
Preferably, the second annular weld is an angle weld.
Has the advantages that: the corrugated pipe main body and the inner wall of the flange can be conveniently welded.
Drawings
FIG. 1 is a schematic structural diagram of a vacuum interrupter in the prior art;
FIG. 2 is a schematic structural view of a bellows assembly according to embodiment 1 of the present invention;
FIG. 3 is a schematic view of a portion of the structure of FIG. 2 at A;
FIG. 4 is a schematic view of a portion of the structure shown at B in FIG. 2;
FIG. 5 is a schematic structural view of the corrugated pipe body of FIG. 2 before seam welding;
FIG. 6 is a schematic view of a portion of the structure of FIG. 5 at C;
FIG. 7 is a schematic structural view of the bellows body of FIG. 2;
FIG. 8 is a schematic view of a portion of the structure of FIG. 7 at D;
FIG. 9 is a schematic structural view of the flange of FIG. 2;
FIG. 10 is a view showing a state in which a bellows main body is roll-welded;
fig. 11 is a schematic structural diagram of a bellows assembly according to embodiment 3 of the present invention.
In the figure: 100-a housing; 200-moving the cover plate; 300-static cover plate; 400-moving the conductive rod; 500-static contact; 600-a bellows; 700-moving contact; 1-a bellows body; 2-a hubbed flange; 3-outer fillet circumferential weld; 4-inner angle circumferential weld; 5-a first seam welding electrode; 6-a second seam welding electrode; 11-straight edge portion; 12-wave form; 13-a tube body; 21-a cylindrical neck; 22-connecting plate body; 111-a first weld; 112-a second weld; 113-a third weld; 40-fillet girth weld.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
as shown in fig. 2, the bellows assembly includes a bellows main body 1 and two flanges, and as shown in fig. 5 to 8, the bellows main body 1 is a multi-layer structure formed by three layers of tube bodies 13, ends of the tube bodies 13 of the respective layers are joined by roll welding to form an integral straight part 11, and a waveform 12 of the bellows main body 1 is U-shaped. As shown in fig. 9, the flange includes a cylindrical neck portion 21 and a connecting plate body 22, the cylindrical neck portion 21 is projected toward one side of the connecting plate body 22 to form the neck flange 2 shown in fig. 2, and each of the straight edge portions 11 is fixed to the neck flange 2 by welding.
Specifically, as shown in fig. 2 to 4, the bellows body 1 is provided with a first welded portion 111, a second welded portion 112, and a third welded portion 113, wherein the first welded portion 111 is formed by an outer peripheral surface of the straight portion 11, the second welded portion 112 is formed by an end surface of the straight portion, and the third welded portion 113 is provided between the first welded portion 111 and the second welded portion 112. The first welding part 111 and the inner wall of the hubbed flange 2 are fixed by argon arc welding to form a first annular welding seam, namely an outer fillet annular welding seam 3 in the figure 4; the second welding part 112 and the outer side end face of the hubbed flange 2 are fixed by argon arc welding to form a second annular welding seam which is an angle welding seam, namely an inner angle annular welding seam 4 in the figure 3; the third weld 113 is fixed to the cylindrical neck 21 of the neck flange 2 by seam welding.
The corrugated pipe assembly has the following advantages:
(1) the corrugated pipe main body 1 adopts a multilayer structure, so that the toughness of the corrugated pipe assembly is favorably enhanced, and the fatigue life of the corrugated pipe assembly is prolonged.
(2) The end parts of the corrugated pipe main body 1 are connected into the integrally-formed straight edge part 11 by adopting a roll welding method, so that the structural strength of the corrugated pipe assembly can be effectively improved, and meanwhile, the sealing performance among all layers of pipe bodies forming the corrugated pipe main body is ensured.
(3) The flange adopts hubbed flange 2, and each straight flange part 11 of bellows main part 1 and flange still pass through the seam welding with the flange apart from having two circular weld and fix for the area of weld between bellows main part 1 and the flange is bigger, connects more stably, is favorable to improving the structural strength of bellows subassembly.
Through above structural design, guaranteed its leakproofness on effectively improving bellows subassembly structural strength's basis for bellows subassembly has longer life, and then satisfies the operation requirement on being applied to high voltage circuit breaker's vacuum interrupter. The flange adopts the high-neck flange 2, so that the thickness of the cylindrical neck 21 can be reduced as much as possible under the condition of ensuring the connection strength of the flange and the corrugated pipe main body 1, the overall quality of the flange is lighter, and the corrugated pipe assembly is better suitable for the requirements of high on-off speed and large on-off stroke of a high-voltage circuit breaker.
The manufacturing method of the corrugated pipe assembly of the invention comprises the following steps:
(1) the method comprises the following steps of (1) roll-welding stainless steel cylinders with different diameters, nesting the stainless steel cylinders with different diameters together layer by layer, and completing the forming of the corrugated pipe through a hydraulic expansion mould of the corrugated pipe, wherein straight cylinder sections are reserved at two ends of each layer of pipe body 13 according to requirements in the process;
(2) processing a high-neck flange 2 meeting the requirement according to the length of the reserved straight cylinder section;
(3) by adopting a proper seam welder, as shown in fig. 10, the reserved straight cylinder sections at the same end of each layer of pipe body 13 are clamped between the first seam welding electrode 5 and the second seam welding electrode 6 of the seam welder, and are seam welded together by the seam welder to form a straight edge part 11, the gaps between each layer are sealed, and then the redundant straight cylinder sections are machined;
(4) seam welding the third welded portion 113 of the straight edge portion 11 and the neck portion 21 of the hubbed flange 2 together;
(5) welding the first welding part 111 of the straight edge part 11 and the inner side end face of the high-neck flange 2 together by adopting an argon arc welding mode to form an outer fillet circumferential weld 3; the second welding part 112 of the straight edge part 11 is welded with the outer side end face of the corresponding hubbed flange 2 to form an inner fillet ring welding seam 4, and the fixed connection of the corrugated pipe body 1 and the flange is completed.
Specific example 2 of the bellows assembly of the present invention:
in comparison with example 1, in example 1, the straight edge portion of the bellows main body is welded and fixed to the flange by the first welding portion, the second welding portion, and the second welding portion. In the embodiment, the straight edge part of the corrugated pipe main body is only welded and fixed with the flange through the first welding part and the second welding part, and is not fixed with the flange through roll welding any more, namely, each straight edge part is only fixedly connected with the corresponding flange at the first welding part and the second welding part, and other parts are not fixedly connected with the flange any more.
It should be noted that the flange in the above embodiment 1 is a neck flange in order to meet the size requirement of seam welding and fixing the flange and the straight edge portion. In this embodiment, since the straight edge portion and the flange are not welded to each other, the flange in this embodiment includes only the connecting plate, and does not include the cylindrical neck portion. Of course, in other embodiments, the above-described hubbed flange of embodiment 1 may be used even if the straight edge portion is no longer roll-welded to the flange.
Specific example 3 of the bellows assembly of the present invention:
the outermost end of the inner fillet girth weld 4 in the above embodiment 1 is flush with the outer end face of the flange; as shown in fig. 11, in the present embodiment, the outer end face of the inner fillet weld 40 is located on the inner wall of the hubbed flange 2, and there may be a problem that the welding operation is inconvenient, but the length dimension of the bellows main body can be reduced.
Specific example 4 of the bellows assembly of the present invention:
the second annular weld in example 1 above was an angle weld; in this embodiment, an inwardly concave annular step is arranged on the outer end side face of the flange, and the outer end face of the annular step is welded and fixed with the outer end face of the corrugated pipe main body to form an annular welding seam.
Specific example 5 of the bellows assembly of the present invention:
the ends of the bellows main body in the above embodiment 1 are all straight-sided portions; in this embodiment, only a portion of the end of the bellows body is a straight portion, and the layers of the tube bodies of the bellows body near the end face are not roll-welded, and at this time, the second annular weld is formed by welding and fixing the layers of the tube bodies and the flanges.
the structure of the vacuum interrupter in this embodiment is different from the structure shown in fig. 1 only in the bellows structure. Specifically, vacuum interrupter includes the casing, and the both ends of casing are equipped with respectively and move apron and quiet apron, move apron, quiet apron and the fixed shell that forms vacuum interrupter of casing, and the static contact is fixed on quiet apron, moves and is equipped with the through-hole on the apron, and the one end of moving the conducting rod is passed through the through-hole and is stretched into inside the shell and fixed with the moving contact, moves the conducting rod and goes up the cover and be equipped with the bellows subassembly, the structure of the bellows subassembly in this embodiment and the concrete embodiment 1 of above-mentioned bellows subassembly in the structure of bellows subassembly the same, no longer describe. The outer end face of one flange of the corrugated pipe assembly is welded and fixed on the movable cover plate, and the inner wall of the other flange is welded and fixed on the movable conducting rod.
Of course, in other embodiments of the vacuum interrupter, the structure of the bellows assembly may also be the one described in any of the above embodiments 2 to 5 of the bellows assembly.
the vacuum circuit breaker comprises a vacuum arc-extinguishing chamber and an operating mechanism, and the structure of the vacuum arc-extinguishing chamber is the same as that of the vacuum arc-extinguishing chamber in the specific embodiment 1 of the vacuum arc-extinguishing chamber, and is not described again. The operating mechanism is in transmission connection with a movable conducting rod of the vacuum arc extinguish chamber, and when the operating mechanism drives the movable conducting rod to act and the movable conducting rod drives the movable contact to act, the corrugated pipe assembly deforms along with the movable conducting rod in a telescopic mode.
Of course, in other embodiments of the vacuum circuit breaker, the structure of the bellows assembly may also adopt the structure of the bellows assembly described in any one of the above-described embodiments 2 to 5 of the bellows assembly.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (9)
1. A bellows subassembly for vacuum interrupter, characterized by includes:
the corrugated pipe comprises a corrugated pipe main body, a corrugated pipe body and a corrugated pipe body, wherein the corrugated pipe main body is of a multilayer structure formed by more than two layers of pipe bodies; straight edge parts are arranged at two axial ends of the corrugated pipe main body, and the straight edge parts are integrally formed by connecting all layers of pipe bodies of the corrugated pipe main body through roll welding;
the flanges are arranged at the two axial ends of the corrugated pipe main body, and each flange is provided with an inner side end face facing to the other flange and an outer side end face back to the other flange;
the first welding part is formed by the outer peripheral surface of the straight edge part, and is fixedly connected and sealed with the inner side end face of the flange through a first annular welding line;
and the second welding part is formed by the end face of the corrugated pipe main body, and is fixedly connected and sealed with the inner wall of the flange through a second annular welding line.
2. The bellows assembly for a vacuum interrupter of claim 1, further comprising a third weld formed by the straight edge portion; the third weld is disposed between the first weld and the second weld;
the flange comprises a connecting plate body and a cylindrical neck part, and the cylindrical neck part protrudes towards one side of the connecting plate body;
the third welding part and the cylindrical neck part are fixed through seam welding.
3. The bellows assembly for a vacuum interrupter as claimed in claim 1 or 2 wherein the ends of the bellows body are straight sections.
4. Bellows assembly for a vacuum interrupter according to claim 1 or 2, wherein the second annular weld is an angle weld.
5. Vacuum interrupter, includes: a housing;
the movable conducting rod is movably assembled on the shell in a guiding way;
characterized by, vacuum interrupter still includes:
one end of the corrugated pipe assembly is fixed on the movable conducting rod, and the other end of the corrugated pipe assembly is fixed on the shell;
the bellows assembly includes:
the corrugated pipe comprises a corrugated pipe main body, a corrugated pipe body and a corrugated pipe body, wherein the corrugated pipe main body is of a multilayer structure formed by more than two layers of pipe bodies; straight edge parts are arranged at two axial ends of the corrugated pipe main body, and the straight edge parts are integrally formed by connecting all layers of pipe bodies of the corrugated pipe main body through roll welding;
the flanges are arranged at the two axial ends of the corrugated pipe main body, and each flange is provided with an inner side end face facing to the other flange and an outer side end face back to the other flange;
the first welding part is formed by the outer peripheral surface of the straight edge part, and is fixedly connected and sealed with the inner side end face of the flange through a first annular welding line;
and the second welding part is formed by the end face of the corrugated pipe main body, and is fixedly connected and sealed with the inner wall of the flange through a second annular welding line.
6. The vacuum interrupter according to claim 5, wherein the bellows assembly further comprises a third weld formed by the straight edge portion; the third weld is disposed between the first weld and the second weld;
the flange comprises a connecting plate body and a cylindrical neck part, and the cylindrical neck part protrudes towards one side of the connecting plate body;
the third welding part and the cylindrical neck part are fixed through seam welding.
7. Vacuum interrupter according to claim 5 or 6, characterized in that the ends of the bellows body are straight sections.
8. Vacuum interrupter according to claim 5 or 6, characterized in that the second annular weld is an angle weld.
9. Vacuum interrupter, comprising: a vacuum arc-extinguishing chamber;
the operating mechanism is in transmission connection with the vacuum arc extinguish chamber;
characterized in that the vacuum interrupter is according to any one of claims 5-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010652470.1A CN111986950A (en) | 2020-07-08 | 2020-07-08 | Bellows subassembly, vacuum interrupter and vacuum circuit breaker for vacuum interrupter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010652470.1A CN111986950A (en) | 2020-07-08 | 2020-07-08 | Bellows subassembly, vacuum interrupter and vacuum circuit breaker for vacuum interrupter |
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| CN111986950A true CN111986950A (en) | 2020-11-24 |
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|---|---|---|---|
| CN202010652470.1A Pending CN111986950A (en) | 2020-07-08 | 2020-07-08 | Bellows subassembly, vacuum interrupter and vacuum circuit breaker for vacuum interrupter |
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| CN (1) | CN111986950A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112951648A (en) * | 2021-02-03 | 2021-06-11 | 国网陕西省电力公司电力科学研究院 | Multilayer metal corrugated pipe used in vacuum arc-extinguishing chamber |
| CN114321390A (en) * | 2021-12-14 | 2022-04-12 | 北京航星机器制造有限公司 | Vacuum chamber dynamic sealing structure for high-temperature forming equipment |
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| CN114321390B (en) * | 2021-12-14 | 2024-04-05 | 北京航星机器制造有限公司 | Vacuum chamber dynamic seal structure for high-temperature forming equipment |
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Application publication date: 20201124 |