Corrugated pipe shielding cover

Abstract

The utility model relates to the technical field of vacuum switch tube accessories, in particular to a corrugated pipe shielding case which comprises an outer shielding case, an inner shielding case is coaxially arranged in the outer shielding case, one end of the outer shielding case is coaxially provided with a guide port, the other end of the outer shielding case is coaxially provided with a connecting ring, and a mounting groove is coaxially formed in the inner shielding case. An internal thread is arranged in the mounting groove; the corrugated pipe shielding cover adopts a split double-layer structure design, during installation, the inner shielding cover is placed in the outer shielding cover, the connecting port in the top of the inner shielding cover is inserted into the first connecting groove in the outer shielding cover, meanwhile, the connecting ring at the bottom of the outer shielding cover is inserted into the second connecting groove of the installation ring, and the inner shielding cover and the outer shielding cover are fixed by fixing the connecting ring. The inner shielding cover and the outer shielding cover are installed in a threaded mode by rotating the guide opening in the top of the outer shielding cover, and when one layer of the outer shielding cover is corroded and broken down, the corrugated pipe shielding cover on the inner layer can still maintain the normal working environment of the corrugated pipe.

Description

Technical Field

[0001] This application relates to the technical field of vacuum switch tube fittings, and particularly to a bellows shielding cover. Background Art

[0002] Some main shielding covers and bellows shielding covers inside the arc extinguishing chamber are generally made of oxygen-free copper or stainless steel. The bellows shielding cover mainly protects the bellows from being corroded by metal vapor and causing air leakage, absorbs a part of the arc energy, and condenses the arc products; especially when the vacuum arc extinguishing chamber breaks a short-circuit current, most of the heat energy generated by the arc is absorbed by the shielding system, which is beneficial to improving the dielectric recovery strength between the contacts; the larger the amount of arc products absorbed by the shielding system, the greater the energy it absorbs, which plays a good role in increasing the breaking capacity of the vacuum arc extinguishing chamber;

[0003] Referring to the Chinese patent application with the publication number CN218826825U, a vacuum arc extinguishing chamber is disclosed. Through the provided protection mechanism, the heat of the moving conductive rod can be conducted to the environment, playing a good heat dissipation role, avoiding the temperature of the bellows being too high and affecting its fatigue strength, and preventing the bellows from twisting during the telescopic process, resulting in the bellows being sprained. It can also play a protective role for the bellows, avoiding the metal vapor generated between the moving contact and the static contact from contacting the bellows and polluting the outer wall of the bellows, improving the service life of the bellows;

[0004] However, in the prior art, the installation method of the bellows shielding cover usually adopts a fixed connection method. And since the bellows shielding cover is to protect the bellows from being corroded by metal vapor, its outer surface is corroded by metal vapor and the accumulation of condensed arc products, and it needs to be replaced regularly. The operation is relatively cumbersome, and when the vacuum switch tube is in a working state, the damage of the bellows shielding cover further causes damage to the bellows; for this reason, we have designed a bellows shielding cover. Summary of the Utility Model

[0005] A bellows shielding cover provided by an embodiment of this application solves the technical problems of maintaining the normal working environment of the bellows by the inner bellows shielding cover when one layer of the double-layer designed bellows shielding cover structure is corroded and penetrated, and being convenient for installation and facilitating the maintenance and replacement of the bellows shielding cover and the bellows.

[0006] An embodiment of this application provides a bellows shielding cover, which includes an outer shielding cover. An inner shielding cover is coaxially arranged inside the outer shielding cover. One end of the outer shielding cover is coaxially provided with a guiding port, and the other end is coaxially provided with a connecting ring. An installation groove is coaxially opened inside the inner shielding cover, and internal threads are provided in the installation groove;

[0007] By adopting a split double-layer structure design for the corrugated pipe shielding cover, the connection port at the top of the inner shielding cover is inserted into the first connection groove inside the outer shielding cover, and at the same time, the connection ring at the bottom of the outer shielding cover is inserted into the second connection groove of the mounting ring. By fixing the connection ring and rotating the guiding port at the top of the outer shielding cover, the threaded installation of the inner shielding cover and the outer shielding cover is achieved. When in installation and use, a transfer ring is coaxially fixedly connected to one end of the corrugated pipe close to the installation groove, and an external thread adapted to the internal thread is provided on the outer side wall of the transfer ring, so as to achieve the threaded connection between the corrugated pipe and the corrugated pipe shielding cover.

[0008] In the technical solution described above in the embodiment of the present application, it has at least the following technical effects:

[0009] 1. In the present application, an installation groove is provided on the inner wall of the inner shielding cover, and internal threads are provided on the inner wall of the installation groove. When installing the corrugated pipe and the corrugated pipe shielding cover, a transfer ring is coaxially fixedly connected to one end of the corrugated pipe close to the installation groove, and an external thread adapted to the internal thread is provided on the outer side wall of the transfer ring, so as to achieve the threaded connection between the corrugated pipe and the corrugated pipe shielding cover, which is more convenient for disassembling and replacing the corrugated pipe and the corrugated pipe shielding cover.

[0010] 2. In the present application, the corrugated pipe shielding cover adopts a split double-layer structure design. During installation, by placing the inner shielding cover inside the outer shielding cover, inserting the connection port at the top of the inner shielding cover into the first connection groove inside the outer shielding cover, and at the same time inserting the connection ring at the bottom of the outer shielding cover into the second connection groove of the mounting ring, and by fixing the connection ring and rotating the guiding port at the top of the outer shielding cover, the threaded installation of the inner shielding cover and the outer shielding cover is achieved. When corrosion penetration occurs in one layer, the inner corrugated pipe shielding cover can still maintain the normal working environment of the corrugated pipe.

[0011] In some embodiments, a ring-shaped protrusion extends inward from the guiding port, a limiting guiding ring is coaxially provided inside the guiding port, the limiting guiding ring is coaxially arranged at one end of the ring-shaped protrusion away from the guiding port, and a first connection groove is coaxially provided between the guiding port and the limiting guiding ring.

[0012] By adopting the above technical solution, through the setting of the limiting guiding ring, the limiting and guiding effect on the corrugated pipe is achieved, preventing the corrugated pipe from undergoing lateral displacement during the extrusion process and improving the service life of the corrugated pipe.

[0013] In some embodiments, one end of the inner shielding cover is coaxially fixedly connected with a connection port, and the other end is coaxially fixedly connected with a mounting ring.

[0014] By adopting the above technical solution, an installation groove is provided on the inner wall of the inner shielding cover, and internal threads are provided on the inner wall of the installation groove. When installing the bellows and the bellows shielding cover, a transfer ring is coaxially fixedly connected to one end of the bellows close to the installation groove, and external threads adapted to the internal threads are provided on the outer side wall of the transfer ring, realizing the threaded connection between the bellows and the bellows shielding cover, and it is more convenient to disassemble and replace the bellows and the bellows shielding cover.

[0015] In some embodiments, first connection threads are coaxially provided in the first connection groove, and first connection threads adapted to the first connection threads are provided on the connection port.

[0016] By adopting the above technical solution, the inner shielding cover is placed inside the outer shielding cover, the connection port at the top of the inner shielding cover is inserted into the first connection groove inside the outer shielding cover, and at the same time, the connection ring at the bottom of the outer shielding cover is inserted into the second connection groove of the installation ring. By fixing the installation ring and rotating the guiding port at the top of the outer shielding cover, the threaded installation of the inner shielding cover and the outer shielding cover is realized. When corrosion breakdown occurs in one layer, the inner shielding cover of the inner layer can still maintain the normal working environment of the bellows.

[0017] In some embodiments, a second connection groove is coaxially provided on the installation ring, and second connection threads are provided in the second connection groove.

[0018] In some embodiments, second connection threads adapted to the second connection threads are provided on the connection ring.

[0019] By adopting the above technical solution, it is convenient for the connection ring at the bottom of the outer shielding cover to be inserted into the second connection groove of the installation ring, realizing the installation of the bottom of the outer shielding cover and the inner shielding cover. Through the first connection groove and the second connection groove, the stable installation of the outer shielding cover and the inner shielding cover is realized, thereby ensuring the safe use of the bellows.

[0020] In some embodiments, a gap is left between the outer shielding cover and the inner shielding cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of a bellows shielding cover provided by an embodiment of the present application;

[0023] Figure 2 It is a schematic internal structural diagram of a bellows shielding cover provided by an embodiment of the present application;

[0024] Figure 3 Schematic diagram of the inner shielding cover structure of a corrugated pipe shielding cover provided by an embodiment of the present application;

[0025] Figure 4 Schematic diagram of the outer shielding cover structure of a corrugated pipe shielding cover provided by an embodiment of the present application;

[0026] Figure 5 Schematic diagram of the internal structure of the outer shielding cover of a corrugated pipe shielding cover provided by an embodiment of the present application.

[0027] Among them, the reference numerals in the figure are as follows:

[0028] 1. Outer shielding cover; 2. Guide port; 3. Limit guide ring; 4. First connection groove; 5. First connection thread; 6. Connection ring; 7. Inner shielding cover; 8. Connection port; 9. First connection thread; 10. Installation ring; 11. Second connection groove; 12. Second connection thread; 13. Installation groove. Detailed implementation manners

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as limiting the present application.

[0033] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0034] In this application, "and / or" is merely an associative relationship describing associated objects, indicating that three relationships may exist; for example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0035] It should be noted that in this application, words such as "in this embodiment", "exemplarily", and "for example" are used to give examples, illustrations, or explanations. Any embodiment or design solution described as "in this embodiment", "exemplarily", or "for example" in this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "in this embodiment", "exemplarily", and "for example" is intended to present relevant concepts in a specific manner, meaning that the specific features, structures, or characteristics described in conjunction with the embodiment may be included in at least one embodiment of this application. The appearance of the above words at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0036] The bellows shield mainly protects the bellows from corrosion by metal vapor, which may cause air leakage, absorbs a part of the arc energy, and condenses the arc products; especially when the vacuum interrupter interrupts a short-circuit current, most of the heat energy generated by the arc is absorbed by the shielding system, which is beneficial to improving the dielectric recovery strength between the contacts; the larger the amount of arc products absorbed by the shielding system, the greater the energy it absorbs, which plays a good role in increasing the breaking capacity of the vacuum interrupter.

[0037] A vacuum interrupter on a valve flap in the related art can conduct the heat of the moving conducting rod to the environment through a provided protection mechanism, playing a good heat dissipation role, avoiding the temperature of the bellows from being too high and affecting its fatigue strength, and can also prevent the bellows from twisting during the telescopic process, resulting in the bellows being sprained. It can also protect the bellows, avoiding the metal vapor generated between the moving contact and the static contact from contacting the bellows and polluting the outer wall of the bellows, thereby improving the service life of the bellows.

[0038] Based on this, in order to improve the installation method of the bellows shield in the related art, which usually adopts a fixed connection method, and since the bellows shield is used to protect the bellows from the corrosion of metal vapor, its outer surface is corroded by metal vapor and the accumulation of condensed arc products, it needs to be replaced regularly, the operation is rather cumbersome, and when the vacuum switch tube is in the working state, the damage of the bellows shield further causes damage to the bellows. The embodiments of the present application provide the following solutions.

[0039] Please refer to Figures 1 to 5 , a bellows shield includes an outer shield 1, an inner shield 7 is coaxially arranged inside the outer shield 1, a gap is left between the outer shield 1 and the inner shield 7, a guiding port 2 is coaxially arranged at one end of the outer shield 1, and a connecting ring 6 is coaxially arranged at the other end;

[0040] The effect of such a setting is that the bellows shield adopts a split double-layer structure design. During installation, by placing the inner shield 7 inside the outer shield 1, inserting the connecting port 8 at the top of the inner shield 7 into the first connecting groove 4 inside the outer shield 1, and at the same time inserting the connecting ring 6 at the bottom of the outer shield 1 into the second connecting groove 11 of the mounting ring 10, by fixing the mounting ring 10 and rotating the guiding port 2 at the top of the outer shield 1, the threaded installation of the inner shield 7 and the outer shield 1 is realized. When corrosion breakdown occurs in one layer, the inner shield 7 of the inner layer can still maintain the normal working environment of the bellows.

[0041] Please refer to Figure 2 and Figure 3 , one end of the inner shield 7 is coaxially fixedly connected with a connecting port 8, and the other end is coaxially fixedly connected with a mounting ring 10. An installation groove 13 is coaxially opened inside the inner shield 7, and internal threads are provided in the installation groove 13;

[0042] The effect of such a setting is that by providing an installation groove 13 on the inner wall of the inner shield 7 and internal threads are provided on the inner wall of the installation groove 13. When installing the bellows and the bellows shield, by coaxially fixedly connecting a transfer ring at one end of the bellows close to the installation groove 13, and external threads adapted to the internal threads are provided on the outer side wall of the transfer ring, the threaded connection between the bellows and the bellows shield is realized.

[0043] Please refer to Figure 2 and Figure 5 , a ring-shaped protrusion extends inward from the guiding port 2, a limiting guiding ring 3 is coaxially arranged inside the guiding port 2, the limiting guiding ring 3 is coaxially arranged at one end of the ring-shaped protrusion away from the guiding port 2, and a first connecting groove 4 is coaxially arranged between the guiding port 2 and the limiting guiding ring 3;

[0044] The effect of such a setting is that through the setting of the limiting guiding ring 3, the limiting and guiding effect on the bellows is achieved, preventing the bellows from shifting horizontally during the extrusion process and improving the service life of the bellows.

[0045] Please refer to Figure 2 and Figure 5 Inside the first connection groove 4, a first connection thread 5 is coaxially provided, and on the connection port 8, a first connection thread 9 adapted to the first connection thread 5 is provided;

[0046] The effect of such a setting is that it is convenient to insert the connection port 8 at the top of the inner shielding cover 7 into the first connection groove 4 inside the outer shielding cover 1, so as to realize the installation of the outer shielding cover 1 and the inner shielding cover 7.

[0047] Please refer to Figure 2 and Figure 3 On the mounting ring 10, a second connection groove 11 is coaxially opened. Inside the second connection groove 11, a second connection thread 12 is provided, and on the connection ring 6, a second connection thread adapted to the second connection thread 12 is provided;

[0048] The effect of such a setting is that it is convenient to insert the connection ring 6 at the bottom of the outer shielding cover 1 into the second connection groove 11 of the mounting ring 10, so as to realize the installation of the bottom of the outer shielding cover 1 and the inner shielding cover 7. Through the first connection groove 4 and the second connection groove 11, the stable installation of the outer shielding cover 1 and the inner shielding cover 7 is realized, thereby ensuring the safe use of the corrugated pipe.

[0049] As can be seen from the above, the working principle of this application is as follows:

[0050] By placing the inner shielding cover 7 inside the outer shielding cover 1, inserting the connection port 8 at the top of the inner shielding cover 7 into the first connection groove 4 inside the outer shielding cover 1, and rotating the mounting ring 10 at the bottom of the inner shielding cover 7, the threaded installation of the inner shielding cover 7 and the outer shielding cover 1 is realized;

[0051] When installing the corrugated pipe and the corrugated pipe shielding cover, by coaxially fixedly connecting a transition ring at one end of the corrugated pipe close to the installation groove 13, and an external thread adapted to the internal thread is provided on the outer side wall of the transition ring, the threaded connection of the corrugated pipe and the corrugated pipe shielding cover is realized.

[0052] The above are only the preferred embodiments of this application, and are not intended to limit this application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A bellows shielding cover, comprising an outer shielding cover (1), characterized in that: An inner shielding cover (7) is coaxially arranged inside the outer shielding cover (1); a guide port (2) is coaxially arranged at one end of the outer shielding cover (1), and a connecting ring (6) is coaxially arranged at the other end; a mounting groove (13) is coaxially opened inside the inner shielding cover (7), and an internal thread is arranged in the mounting groove (13).

2. The bellows shielding cover according to claim 1, characterized in that: The guide opening (2) is provided with an annular protrusion extending inwardly, a limiting guide ring (3) is coaxially provided inside the guide opening (2), the limiting guide ring (3) is coaxially arranged at one end of the annular protrusion away from the guide opening (2), and a first connecting groove (4) is coaxially provided between the guide opening (2) and the limiting guide ring (3).

3. The bellows shielding cover according to claim 2, characterized in that: One end of the inner shielding cover (7) is coaxially fixedly connected to a connection port (8), and the other end is coaxially fixedly connected to a mounting ring (10).

4. The bellows shielding cover according to claim 3, characterized in that: A first connecting thread (5) is coaxially arranged in the first connecting groove (4), and a first connecting thread (9) matching the first connecting thread (5) is arranged on the connecting port (8).

5. The bellows shielding cover according to claim 3, characterized in that: A second connecting groove (11) is coaxially provided on the mounting ring (10), and a second connecting screw thread (12) is provided in the second connecting groove (11).

6. The bellows shielding cover according to claim 5, characterized in that: The connecting ring (6) is provided with a second connecting thread matched with the second connecting thread (12).

7. The bellows shielding cover according to claim 1, characterized in that: A gap is left between the outer shielding cover (1) and the inner shielding cover (7).

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