Vacuum arc-extinguishing chamber with long service life

Abstract

The utility model relates to the technical field of vacuum arc extinguish chambers, in particular to a vacuum arc extinguish chamber long in service life, which comprises a shell assembly, a conducting rod combination and a cleaning assembly, the shell assembly comprises a shell, the shell is provided with a vacuum cavity, the conducting rod combination comprises a movable conducting rod, one end of the movable conducting rod is slidably arranged in the vacuum cavity, and the other end of the movable conducting rod is slidably arranged in the vacuum cavity. The movable conducting rod is arranged in the vacuum cavity, the cleaning assembly is connected with the movable conducting rod, the cleaning assembly comprises a cleaning piece, the cleaning piece is arranged in the vacuum cavity in a sliding mode, and the side face of the cleaning piece is attached to the cavity wall of the vacuum cavity. Metal particles stacked on the area, close to the contact, of the vacuum cavity are swept away, so that the completeness and insulativity of the area, close to the contact, of the vacuum cavity are guaranteed, and the advantages that a shielding cylinder is not adopted, the service life of the shell is prolonged, and machining is convenient and fast are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum interrupter chambers, and more specifically to a vacuum interrupter chamber with a long service life. Background Art

[0002] The vacuum interrupter is the core component of medium and high voltage power switches. Through the insulation of the vacuum inside the ceramic shell, the medium and high voltage circuits can quickly extinguish the arc and suppress the current after the power is cut off, avoiding accidents and unexpected events.

[0003] Our company currently has a vacuum interrupter, such as Figure 1 As shown, it includes a ceramic shell 90, a moving conductive rod 91 and a static conductive rod 92. The ceramic shell 90 has a vacuum chamber 901. The moving conductive rod 91 is slidably arranged in the vacuum chamber 901. The static conductive rod 92 is fixedly installed in the vacuum chamber 901. When the moving conductive rod 91 moves, the moving conductive rod 91 abuts against or separates from the static conductive rod 92. The moving conductive rod 91 and the static conductive rod 92 are provided with a moving contact 911 and a static contact 921 at opposite ends. It should be noted that when the moving contact 911 and the static contact 921 are electrically separated under the action of an external operating mechanism, a vacuum arc will be generated between the moving contact 911 and the static contact 921, and the contact surface will be ablated under high temperature, and the ablated metal particles will splash outward in the form of steam or droplets. Since in this embodiment, there is no barrier between the cavity wall of the vacuum cavity 901 and the moving contact 911 and the stationary contact 921, the metal particles splashing outward are easy to adhere to the cavity wall of the vacuum cavity 901 near the moving contact 911, which can be regarded as a conductive layer attached to the inner wall of the insulating ceramic shell 90. Then, when a vacuum arc is generated next time, the vacuum arc is very easy to be transmitted to the cavity wall of the vacuum cavity 901 near the moving contact 911, increasing the risk of the ceramic shell 90 being punctured. In order to extend the service life of the ceramic shell 90 of the vacuum arc extinguishing chamber, refer to Figure 2, the existing practice in the industry is to set a shielding tube 93 between the cavity wall of the vacuum cavity 901 and the moving contact 911, and the metal particles splashing outward will adhere to the shielding tube 93 without direct contact with the ceramic shell 90. The shielding tube 93 is generally made of oxygen-free copper and manufactured by one-piece stretching. When the outer diameter of the shielding tube 93 is large, one-piece stretching is more difficult, the defective rate is high, and the production cost is high. In response to this technical problem, there is a practice in the industry, as disclosed in the patent document (CN211428087U), that is, the shielding tube 93 is processed in sections and welded after splicing to form an integral body. However, how to further reduce the risk of metal particle erosion of the inner wall of the ceramic shell 90 without using the shielding tube 93, which helps to extend the service life of the ceramic shell 90, and has a relatively simple structure and is more convenient to process, is still a blank in the industry.

[0004] Therefore, there is a demand for providing a vacuum arc extinguishing chamber that does not use a shielding tube, helps to extend the service life of the shell, and is easy to process. Summary of the invention

[0005] The main purpose of the present application is to provide a vacuum arc extinguishing chamber with a long service life, wherein the vacuum arc extinguishing chamber with a long service life comprises a shell assembly, a conductive rod assembly and a cleaning assembly, the shell assembly comprises a shell, the shell has a vacuum chamber, the conductive rod assembly comprises a movable conductive rod, one end of the movable conductive rod is slidably arranged in the vacuum chamber, the cleaning assembly is connected to the movable conductive rod, the cleaning assembly comprises a cleaning piece, the cleaning piece is slidably arranged in the vacuum chamber, and the side surface of the cleaning piece is in contact with the chamber wall of the vacuum chamber, when the movable conductive rod moves, the cleaning piece moves a predetermined distance along the direction of movement of the movable conductive rod, and sweeps away the metal particles deposited in the vacuum chamber near the contact area to ensure the integrity and insulation of the vacuum chamber near the contact area, because the cleaning assembly has a simple structure, it has the advantages of not using a shielding tube, helping to extend the service life of the shell, and convenient processing.

[0006] Another object of the present application is to provide a vacuum arc extinguishing chamber with a long service life, wherein the cleaning assembly also includes a cleaning seat, the cleaning piece is mounted on the cleaning seat, the cleaning seat is connected to the moving conductive rod, and the cleaning assembly also includes a plurality of connecting rod bodies, the two ends of the connecting rod body are respectively connected to the cleaning seat and the moving conductive rod, and the connection between the cleaning seat and the moving conductive rod is achieved through the connecting rod body.

[0007] Another object of the present application is to provide a vacuum arc extinguishing chamber with a long service life, wherein the cleaning assembly also includes a cleaning seat, the cleaning piece is mounted on the cleaning seat, the cleaning seat is connected to the moving conductive rod, the cleaning assembly also includes a plurality of first rope bodies, a plurality of second rope bodies and a plurality of reset elastic members, the two ends of the first rope body are respectively connected to the moving conductive rod and an end of the cleaning seat close to the moving conductive rod, the two ends of the second rope body are respectively connected to the other end of the cleaning seat and the reset elastic member, the end of the reset elastic member facing away from the second rope body is fixedly connected to the outer shell assembly, and the connection between the cleaning seat and the moving conductive rod is realized through the first rope body, the second rope body and the reset elastic member.

[0008] In order to achieve at least one of the above-mentioned invention purposes, the present application provides a vacuum interrupter with a long service life, wherein the vacuum interrupter with a long service life comprises:

[0009] A housing assembly, the housing assembly comprising a shell having a vacuum chamber; and

[0010] a conductive rod assembly, the conductive rod assembly comprising a movable conductive rod, one end of the movable conductive rod being slidably disposed in the vacuum chamber; and

[0011] A cleaning component is connected to the movable conductive rod, and the cleaning component includes a cleaning piece, which is slidably arranged in the vacuum chamber, and the side surface of the cleaning piece is in contact with the cavity wall of the vacuum chamber. When the movable conductive rod moves, the cleaning piece moves a predetermined distance along the direction of movement of the movable conductive rod.

[0012] In one or more embodiments of the present application, the cleaning assembly further includes a cleaning seat, the cleaning piece is mounted on the cleaning seat, and the cleaning seat is connected to the movable conductive rod.

[0013] In one or more embodiments of the present application, the cleaning assembly further includes a plurality of connecting rod bodies, and two ends of the connecting rod bodies are respectively connected to the cleaning seat and the movable conductive rod.

[0014] In one or more embodiments of the present application, the cleaning assembly also includes a plurality of first rope bodies, a plurality of second rope bodies and a plurality of reset elastic members, the two ends of the first rope body are respectively connected to the moving conductive rod and one end of the cleaning seat close to the moving conductive rod, the two ends of the second rope body are respectively connected to the other end of the cleaning seat and the reset elastic member, and the end of the reset elastic member facing away from the second rope body is fixedly connected to the outer shell assembly.

[0015] In one or more embodiments of the present application, the vacuum arc extinguishing chamber with a long service life further includes a protective cover, which is fixedly mounted on the moving conductive rod, and the cleaning seat is connected to the moving conductive rod through the protective cover.

[0016] In one or more embodiments of the present application, a plurality of limiting protrusions are provided on the cavity wall of the vacuum cavity, the limiting protrusions are located between the cleaning seat and the protective cover, and the limiting protrusions are provided with a plurality of guide holes.

[0017] In one or more embodiments of the present application, the conductive rod combination also includes a static conductive rod, which is fixedly mounted on the shell assembly, one end of the static conductive rod extends into the vacuum chamber and is arranged opposite to the dynamic conductive rod, and the opposite ends of the static conductive rod and the dynamic conductive rod are respectively provided with a static contact and a moving contact, when the dynamic conductive rod is moved, the moving contact abuts against or separates from the static contact, and when the moving contact abuts against the static contact, the cleaning seat is located at the end of the static contact away from the moving contact.

[0018] In one or more embodiments of the present application, the cleaning seat has a through hole at its center, and the diameter of the through hole is larger than the maximum radial dimension of the static contact.

[0019] In one or more embodiments of the present application, the shell assembly also includes a static end cover and a dynamic end cover, the static end cover and the dynamic end cover are respectively located at the two ends of the shell and close the two end openings of the vacuum chamber, the dynamic conductive rod passes through the dynamic end cover, and the static conductive rod passes through the static end cover.

[0020] In one or more embodiments of the present application, the vacuum arc extinguishing chamber with a long service life also includes a bellows, which is sleeved on the moving conductive rod, the bellows is located between the protective cover and the moving end cover, and the two ends of the bellows are respectively connected to the protective cover and the moving end cover.

[0021] In an embodiment of the present application, a vacuum arc extinguishing chamber with a long service life includes a shell assembly, a conductive rod assembly and a cleaning assembly. The shell assembly includes a shell having a vacuum chamber. The conductive rod assembly includes a movable conductive rod. One end of the movable conductive rod is slidably disposed in the vacuum chamber. The cleaning assembly is connected to the movable conductive rod. The cleaning assembly includes a cleaning piece. The cleaning piece is slidably disposed in the vacuum chamber, and the side surface of the cleaning piece is in contact with the chamber wall of the vacuum chamber. When the movable conductive rod moves, the cleaning piece moves a predetermined distance along the direction of movement of the movable conductive rod, and sweeps away metal particles coated on the vacuum chamber near the contact area to ensure the integrity and insulation of the vacuum chamber near the contact area. Because the cleaning assembly has a simple structure, it has the advantages of not using a shielding tube, helping to extend the service life of the shell, and convenient processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0023] Figure 1 The figure shows a schematic diagram of the structure of a conventional vacuum interrupter contact;

[0024] Figure 2 The figure shows a schematic diagram of another existing structure in which a shielding tube is added to the contact;

[0025] Figure 3 The figure shows a schematic structural diagram of a vacuum interrupter with a long service life according to the first embodiment of the utility model;

[0026] Figure 4 The figure shows a schematic structural diagram of a vacuum interrupter with a long service life according to the second embodiment of the utility model. DETAILED DESCRIPTION

[0027] The terms and words used in the following specification and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustrative purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0028] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0029] Although ordinals such as "first," "second," and the like will be used to describe various components, those components are not limited herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more associated listed items.

[0030] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates an exception. In addition, it will be understood that the terms "including" and / or "having" when used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0031] Application Overview

[0032] In the existing vacuum arc chamber, there is a risk of the inner wall of the shell being corroded by metal particles, and the shielding tube is difficult to manufacture when the radial dimension is large, and the production cost is high. How to further reduce the risk of the inner wall of the ceramic shell being corroded by metal particles without using a shielding tube, which will help extend the service life of the ceramic shell, and a replacement solution with a simpler structure and easier processing is still a blank in the industry.

[0033] Based on the above technical problems, the present application proposes a vacuum arc chamber with a long service life, wherein the vacuum arc chamber with a long service life has a simple structure, does not involve complicated manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the vacuum arc chamber with a long service life provided by the present application is easy to produce and low in cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0034] Schematic diagram of a long-life vacuum interrupter,

[0035] refer to Figure 3 to Figure 4 According to any preferred embodiment of the utility model, a vacuum interrupter with a long service life includes a housing assembly 10 and a conductive rod assembly 20.

[0036] Specifically, in any embodiment of the present utility model, if Figure 3 As shown, the housing assembly 10 includes a shell 101, a static end cover 102 and a dynamic end cover 103, the shell 101 has a through vacuum chamber 101, the static end cover 102 and the dynamic end cover 103 are respectively located at two ends of the shell 101 and are fixedly connected to the shell 101 by welding, and the static end cover 102 and the dynamic end cover 103 close the two end openings of the vacuum chamber 1011, the shell 101 is preferably made of ceramic, and the vacuum chamber 1011 is evacuated.

[0037] In addition, in any embodiment of the present invention, Figure 3As shown, the conductive rod assembly 20 includes a dynamic conductive rod 201 and a static conductive rod 202, one end of the dynamic conductive rod 201 passes through the dynamic end cover 103 and is slidably disposed in the vacuum chamber 1011, the static conductive rod 202 is fixedly mounted on the housing assembly 10, and one end of the static conductive rod 202 passes through the static end cover 102 and extends into the vacuum chamber 1011, and the static conductive rod 202 is arranged opposite to the dynamic conductive rod 201; in addition, the opposite ends of the static conductive rod 202 and the dynamic conductive rod 201 are respectively provided with a static contact 2021 and a dynamic contact 2011 by bolt connection, and when the dynamic conductive rod 201 moves, the dynamic contact 2011 abuts against or separates from the static contact 2021.

[0038] It should be noted that, assuming that the moving contact 2011 and the static contact 2021 are electrically abutted against each other at this time, when the moving conductive rod 201 is separated from the static contact 2021 by the drive of an external operating mechanism, a vacuum arc will be generated between the moving contact 2011 and the static contact 2021 and the contact surface will be burned. The tiny metal particles separated by the burning will splash to the outside of the contact in the form of vapor or droplets, and adhere to the cavity wall of the vacuum cavity 1011 near the static contact 2021 and the moving contact 2011, and reduce the insulation performance of the shell 101.

[0039] In view of this, in order to avoid the accumulation of metal particles on the cavity wall at the static contact 2021 and the moving contact 2011, in any embodiment of the present utility model, Figure 3 As shown, the vacuum arc extinguishing chamber with a long service life also includes a cleaning assembly 30, and the cleaning assembly 30 is connected to the moving conductive rod 201. The cleaning assembly 30 includes a cleaning piece 301, and the cleaning piece 301 is slidably arranged in the vacuum chamber 1011, and the side surface of the cleaning piece 301 is in contact with the cavity wall of the vacuum chamber 1011. When the moving conductive rod 201 moves, the cleaning piece 301 moves a predetermined distance along the direction of movement of the moving conductive rod 201.

[0040] It should be noted that, in the present invention, by providing the cleaning member 301 connected to the moving conductive rod 201, when the moving conductive rod 201 approaches or moves away from the static conductive rod 202, the cleaning member 301 moves up and down and cleans the cavity wall of the vacuum chamber 1011 near the moving contact 2011 and the static contact 2021, so as to ensure that the cavity wall of the vacuum chamber 1011 near the moving contact 2011 and the static contact 2021 is not attached to or extended into the metal particles, so as to ensure the original insulation performance of the shell 101 as a ceramic material, and the metal particles originally attached to the vacuum chamber 1011 near the moving contact 2011 and the static contact 2021 are not attached to or extended into the cavity wall of the vacuum chamber 1011 near the moving contact 2011 and the static contact 2021. As the cleaning member 301 moves up and down, the tiny metal particles on the cavity wall of area 1 are swept onto the cavity wall of the vacuum cavity 1011 away from the moving contact 2011 and the static contact 2021, or directly swept onto the static end cover 102 or the end of the moving conductive rod 201 close to the moving end cover 103. Since these areas are far away from the moving contact 2011 and the static contact 2021, the vacuum arc between the moving contact 2011 and the static contact 2021 is difficult to be induced to these areas, thereby greatly reducing the risk of the part of the shell 101 close to the contact area being broken down due to reduced insulation. Compared with the prior art in which the outside of the contact is directly the cavity wall of the housing 101, the utility model helps to increase the service life of the vacuum arc chamber. Compared with the technical solution in the prior art in which a shielding cylinder is arranged between the outside of the contact and the cavity wall of the housing 101, the utility model has a simple structure of the cleaning assembly 30 and is relatively easy to process. When the outer diameter of the shielding cylinder is large, compared with the shielding cylinder that is more difficult to process and has a higher manufacturing cost, the utility model is a low-cost alternative solution, which can be used in low-end products of vacuum arc chambers with large radial dimensions. In summary, compared with the prior art, the utility model has the advantages of not using a shielding cylinder, helping to extend the service life of the housing 101, and convenient processing.

[0041] Further, in any embodiment of the present utility model, in order to place the cleaning member 301, as Figure 3 As shown, the cleaning assembly 30 also includes a cleaning seat 302, the cleaning seat 302 is in the shape of a round cake, and the side wall of the cleaning seat 302 has an annular groove 3021, the cleaning piece 301 is annular, and the cleaning piece 301 is sleeved on the annular groove 3021 of the cleaning seat 302, and the cleaning seat 302 is connected to the dynamic conductive rod 201.

[0042] It should be noted that the material of the cleaning piece 301 is preferably aluminum silicate ceramic fiber or stainless steel fiber, and the material of the cleaning seat 302 is preferably ceramic. By making the cleaning piece 301 be sleeved in the annular groove 3021 and the end face of the cleaning piece 301 being fitted by the annular groove 3021, the cleaning seat 302 can protect the cleaning piece 301, and the heat insulation and insulating properties of the ceramic material of the cleaning seat 302 are fully utilized, which can effectively reduce the heat transferred to the cleaning piece 301, and thus provide a sufficient basis for selecting materials with different properties for the cleaning piece 301; in addition, in the utility model, when the moving contact 2011 abuts against the static contact 2021, the cleaning seat 302 is located at the end of the static contact 2021 away from the moving contact 2011.

[0043] In addition, in any embodiment of the present invention, Figure 3 As shown, the vacuum interrupter with a long service life also includes a protective cover 2012 and a bellows 40. The protective cover 2012 is fixedly mounted on the moving conductive rod 201 by welding. The end of the protective cover 2012 away from the moving contact 2011 has a protective cavity 20121. One end of the bellows 40 extends into the protective cavity 20121, and the bellows 40 is sleeved on the moving conductive rod 201. More specifically, the bellows 40 is located between the protective cover 2012 and the moving end cover 103, and the bellows 40 is disposed between the protective cover 2012 and the moving end cover 103. The two ends of 0 are respectively connected to the protective cover 2012 and the dynamic end cover 103 by welding, and the protective cover 2012 provides a protection for the bellows 40 to prevent metal vapor from directly acting on the bellows 40 and affecting the mechanical properties of the bellows 40; in addition, in order to ensure the compactness of the structure of each component, in the utility model, the structural feature that the radial dimension of the protective cover 2012 is larger than that of the dynamic conductive rod 201 is fully utilized, so that the cleaning seat 302 is connected to the dynamic conductive rod 201 through the protective cover 2012.

[0044] More specifically, in the first embodiment of the present utility model, in order to realize the connection between the cleaning assembly 30 and the protective cover 2012, as shown in FIG. Figure 3As shown, the cleaning assembly 30 also includes a plurality of connecting rod bodies 303, and the two ends of the connecting rod body 303 are respectively connected to the cleaning seat 302 and the protective cover 2012 on the moving conductive rod 201. In the embodiment of the present application, the material of the connecting rod body 303 is preferably ceramic, and both ends of the connecting rod body 303 have external threads. The end face of one end of the cleaning seat 302 close to the moving conductive rod 201 has a plurality of first threaded holes (not marked in the figure), and the side wall of the protective cover 2012 has a flange with a plurality of second threaded holes (not marked in the figure), and the two ends of the connecting rod body 303 are respectively threadedly connected to the cleaning seat 302 and the protective cover 2012.

[0045] It should be noted that, in the first embodiment, when the moving conductive rod 201 moves away from the static conductive rod 202, the protective cover 2012 fixedly connected to the moving conductive rod 201 follows and moves a predetermined distance, and drives the connecting rod body 303 to move the same distance in the direction of the moving end cover 103, then the cleaning seat 302 and the cleaning member 301 sleeved on the cleaning seat 302 move a predetermined distance in the direction of the moving end cover 103 and clean the cavity wall of the vacuum chamber 1011 near the moving contact 2011; similarly, when the moving conductive rod 201 moves in the direction of the static conductive rod 202, the cleaning member 301 cleans the above-mentioned area for the second time. Obviously, in the first embodiment of the utility model, the cleaning assembly 30 has a simple structure, low manufacturing cost, and reliable connection relationship, and is a preferred solution for replacing the shielding cylinder.

[0046] Figure 4 The diagram shows a second embodiment of the utility model. In the second embodiment, the cleaning assembly 30 also includes a plurality of first rope bodies 304, a plurality of second rope bodies 305 and a plurality of reset elastic members 306. The two ends of the first rope body 304 are respectively connected to the moving conductive rod 201 and one end of the cleaning seat 302 close to the moving conductive rod 201 by a knot, the two ends of the second rope body 305 are respectively connected to the other end of the cleaning seat 302 and the reset elastic member 306 by a knot, and the end of the reset elastic member 306 facing away from the second rope body 305 is fixedly connected to the static end cover 102 of the outer shell assembly 10, and the fixed connection method is preferably welding.

[0047] It should be noted that, in the second embodiment, the reset elastic member 306 is preferably a spring, the first rope body 304 and the second rope body 305 are inelastic or slightly elastic, and the materials of the first rope body 304 and the second rope body 305 include but are not limited to quartz fiber or steel wire with an insulating layer. When the moving conductive rod 201 moves toward the moving end cover 103, the first rope body 304 provides a pulling force to the cleaning seat 302 and moves it upward a predetermined distance. At this time, the reset elastic member 306 is subjected to the pulling force of the second rope body 305 and is in a stretched state; when the moving conductive rod 201 moves toward the static end cover 102, the reset elastic member 306 provides a downward force to move the cleaning seat 302 to the initial position toward the static end cover 102.

[0048] Further, in any embodiment of the present invention, if Figure 3 or Figure 4 As shown, a plurality of limiting protrusions 1012 are provided on the cavity wall of the vacuum cavity 1011 , and the limiting protrusions 1012 are located between the cleaning seat 302 and the protective cover 2012 . The limiting protrusions 1012 are provided with a plurality of guide holes 10121 .

[0049] It should be noted that, in any embodiment of the present utility model, the cross section of the limiting protrusion 1012 is a circular ring, and the radial dimension of the inner hole of the circular ring is greater than the maximum radial dimension of the moving contact 2011; it should also be noted that, in the first embodiment, if Figure 3 As shown, the connecting rod body 303 passes through the guide hole 10121. It is worth mentioning that, because the connecting rod body 303 is slidably arranged in the guide hole 10121 and the connecting rod body 303 is connected to the protective cover 2012, the connecting rod body 303 will limit the circumferential rotation of the protective cover 2012, further reducing the risk of the bellows 40 being twisted; in the second embodiment, as Figure 4 As shown, the first rope body 304 passes through the guide hole 10121 , and the guide hole 10121 provides a guiding function for the first rope body 304 .

[0050] Furthermore, in order to avoid interference between the cleaning seat 302 and the static contact 2021 during movement, Figure 3 or Figure 4 As shown, the center of the cleaning seat 302 has a through hole 3022 , and the aperture of the through hole 3022 is larger than the maximum radial dimension of the static contact 2021 .

[0051] In summary, the vacuum interrupter with a long service life is explained based on the embodiment of the present application, which provides the vacuum interrupter with a long service life with advantages such as not using a shielding tube, helping to extend the service life of the shell, and convenient processing.

[0052] It is worth mentioning that in the embodiment of the present application, the vacuum interrupter with a long service life has a simple structure, does not involve complex manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the vacuum interrupter with a long service life provided by the present application is easy to produce and has low cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0053] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A vacuum interrupter with a long service life, characterized in that: The vacuum interrupter with long service life comprises A housing assembly, the housing assembly comprising a shell having a vacuum chamber; and a conductive rod assembly, the conductive rod assembly comprising a movable conductive rod, one end of the movable conductive rod being slidably disposed in the vacuum chamber; as well as A cleaning component is connected to the movable conductive rod, and the cleaning component includes a cleaning piece, which is slidably arranged in the vacuum chamber, and the side surface of the cleaning piece is in contact with the cavity wall of the vacuum chamber. When the movable conductive rod moves, the cleaning piece moves a predetermined distance along the direction of movement of the movable conductive rod.

2. The vacuum interrupter with a long service life according to claim 1, characterized in that: The cleaning assembly also includes a cleaning seat, the cleaning piece is sleeved on the cleaning seat, and the cleaning seat is connected to the movable conductive rod.

3. The vacuum interrupter with a long service life according to claim 2, characterized in that: The cleaning assembly also includes a plurality of connecting rod bodies, and two ends of the connecting rod bodies are respectively connected to the cleaning seat and the movable conductive rod.

4. The vacuum interrupter with a long service life according to claim 2, characterized in that: The cleaning assembly also includes a plurality of first rope bodies, a plurality of second rope bodies and a plurality of reset elastic members, the two ends of the first rope bodies are respectively connected to the moving conductive rod and one end of the cleaning seat close to the moving conductive rod, the two ends of the second rope bodies are respectively connected to the other end of the cleaning seat and the reset elastic member, and the end of the reset elastic member facing away from the second rope body is fixedly connected to the outer shell assembly.

5. The vacuum interrupter with long service life according to claim 3 or 4, characterized in that: The vacuum interrupter with a long service life further comprises a protective cover, which is fixedly mounted on the movable conductive rod, and the cleaning seat is connected to the movable conductive rod via the protective cover.

6. The vacuum interrupter with a long service life according to claim 5, characterized in that: The cavity wall of the vacuum cavity is provided with a plurality of limiting protrusions, the limiting protrusions are located between the cleaning seat and the protective cover, and the limiting protrusions are provided with a plurality of guide holes.

7. The vacuum interrupter with a long service life according to claim 5, characterized in that: The conductive rod combination also includes a static conductive rod, which is fixedly mounted on the housing assembly. One end of the static conductive rod extends into the vacuum chamber and is arranged opposite to the dynamic conductive rod. The opposite ends of the static conductive rod and the dynamic conductive rod are respectively provided with a static contact and a dynamic contact. When the dynamic conductive rod moves, the dynamic contact abuts against or separates from the static contact. When the dynamic contact abuts against the static contact, the cleaning seat is located at the end of the static contact away from the dynamic contact.

8. The vacuum interrupter with a long service life according to claim 7, characterized in that: The cleaning seat has a through hole at its center, and the diameter of the through hole is larger than the maximum radial dimension of the stationary contact.

9. The vacuum interrupter with a long service life according to claim 7, characterized in that: The housing assembly further includes a static end cover and a dynamic end cover, wherein the static end cover and the dynamic end cover are respectively located at two ends of the housing and close two end openings of the vacuum chamber, the dynamic conductive rod passes through the dynamic end cover, and the static conductive rod passes through the static end cover.

10. The vacuum interrupter with a long service life according to claim 9, characterized in that: The vacuum interrupter with a long service life also includes a bellows, which is sleeved on the moving conductive rod, located between the protective cover and the moving end cover, and the two ends of the bellows are respectively connected to the protective cover and the moving end cover.

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