Shielding cylinder of vacuum arc-extinguishing chamber

Abstract

The utility model belongs to the technical field of vacuum arc-extinguishing chambers, and particularly relates to a vacuum arc-extinguishing chamber shielding cylinder, which comprises a shielding cylinder body and a shell, the shielding cylinder body is arranged in the shell, and a plurality of groups of buffer assemblies for buffering the shielding cylinder body are arranged between the shielding cylinder body and the shell; the shielding cylinder body is of a hollow cylindrical structure; a plurality of raised ribs are arranged on the inner wall of the shielding cylinder body and are uniformly distributed along the axial direction of the shielding cylinder body; the cross sections of the ribs are triangular, and the tips of the ribs face the central axis of the shielding cylinder body; detachable adsorption enhancing parts are also arranged in the shielding cylinder body; and the adsorption enhancing parts and the ribs are distributed in a crossed manner. Through the arrangement of the buffer assembly, when the shielding cylinder is subjected to external impact, the buffer spring can generate elastic deformation and absorb impact energy, and the impact force is further buffered through relative sliding of the first buffer rod and the second buffer rod, so that the cylinder body of the shielding cylinder is effectively protected, and the impact resistance of the shielding cylinder is improved.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum interrupter technology, specifically a vacuum interrupter shielding cylinder. Background Technology

[0002] As a core component of high-voltage switchgear, the performance of vacuum interrupters directly affects the safe and stable operation of power systems. The shielding cylinder plays a crucial role in absorbing arc energy and protecting the insulating outer shell within the vacuum interrupter. In practical applications, such as when a power system encounters a short-circuit fault, a powerful electrodynamic impact is generated. Furthermore, during the transportation and installation of vacuum interrupters, they are inevitably subjected to external forces such as collisions and vibrations.

[0003] Most existing vacuum interrupter shielding cylinders employ a rigid structural design, lacking effective buffering protection between the cylinder body and the outer shell. When external impacts occur, the impact force acts directly on the cylinder body. Due to the absence of a buffer, the cylinder body is highly susceptible to deformation, cracking, and other damage. Once the shielding cylinder is damaged, its ability to absorb arc energy decreases significantly. Metal vapor will directly deposit on the insulating outer shell of the vacuum interrupter, leading to reduced insulation performance, poorer arc-extinguishing effect, and potentially even causing a short circuit inside the vacuum interrupter, seriously threatening the normal operation of the power system. Furthermore, frequent replacement of damaged shielding cylinders not only increases maintenance costs but also causes power supply interruptions, affecting users' normal electricity consumption. Therefore, the development of a vacuum interrupter shielding cylinder with excellent impact resistance is urgently needed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a shielding cylinder for a vacuum interrupter.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A vacuum interrupter shielding cylinder, comprising:

[0007] The shielding cylinder body and the outer shell are provided, wherein the shielding cylinder body is installed inside the outer shell, and multiple sets of buffer components for buffering the shielding cylinder body are installed between the shielding cylinder body and the outer shell.

[0008] The shielding cylinder body is a hollow cylindrical structure; the inner wall of the shielding cylinder body is provided with multiple raised ribs, which are evenly distributed along the axial direction of the shielding cylinder body; the cross-section of the ribs is triangular, and the tip of the ribs faces the central axis of the shielding cylinder body; the shielding cylinder body is also provided with a detachable adsorption enhancement component, which is distributed intersectingly with the ribs.

[0009] Furthermore, the buffer assembly includes a buffer spring, a first buffer rod, and a second buffer rod. One end of the first buffer rod is fixedly connected to the inner wall of the outer shell, and one end of the second buffer rod is fixedly connected to the outer wall of the shielding cylinder. The end of the first buffer rod away from the outer shell is sleeved with the end of the second buffer rod away from the shielding cylinder, and the inner diameter of the first buffer rod is equal to the outer diameter of the second buffer rod.

[0010] Furthermore, two limiting blocks are fixedly installed on the outer wall of the second buffer rod, and a limiting groove is formed on the inner wall of the first buffer rod, with the limiting blocks and the limiting groove being adapted to each other.

[0011] Furthermore, the side wall of the shielding cylinder is provided with multiple heat dissipation holes, and the outer surface of the outer shell is provided with heat dissipation grooves in a spiral shape.

[0012] Furthermore, the adsorption enhancement component has a honeycomb structure, is made of porous adsorption material, and has a snap-fit ​​structure on its outer side that matches the inner wall of the cylinder, making it easy to install and disassemble.

[0013] Furthermore, multiple reinforcing steel bars and multiple elastic connecting pieces are evenly installed on the outside of the outer shell. The two ends of the reinforcing steel bars are fixedly connected to the two ends of the outer shell, and one end of the elastic connecting piece is fixedly connected to the reinforcing steel bar, while the other end is attached to the surface of the outer shell.

[0014] Furthermore, the shielding cylinder body is provided with annular mounting flanges at both ends, and the mounting flanges are provided with multiple mounting holes.

[0015] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:

[0016] Fixed connection: refers to a connection in which parts or components are fixed in place and there is no relative movement. It is divided into two types: detachable connection and non-detachable connection.

[0017] (1) Detachable connection: The components are fixed together using screws, splines, wedges, etc. This type of connection can be disassembled during maintenance without damaging the parts. However, the specifications of the connecting parts used must be correct (such as the length of the bolts, keys, wedges) and properly tightened.

[0018] (2) Non-removable connections: These mainly refer to welding, riveting, and tenon joints. Since disassembly requires forging, sawing, or oxyacetylene cutting for repair or replacement, the parts generally cannot be reused. At the same time, attention should be paid to process quality, technical inspection, and remedial measures (such as correction and polishing) during connection.

[0019] The beneficial effects of this utility model are:

[0020] 1. By setting up a buffer assembly, when the shielding cylinder is subjected to external impact, the buffer spring can undergo elastic deformation to absorb the impact energy, and the relative sliding of the first buffer rod and the second buffer rod further buffers the impact force, thereby effectively protecting the shielding cylinder body and improving the impact resistance of the shielding cylinder.

[0021] 2. The ribs on the inner wall of the cylinder can increase the contact area between the electric arc and the adsorption enhancement component. At the same time, the tips of the ribs can guide impurities such as metal vapor to move towards the adsorption enhancement component. The honeycomb structure adsorption enhancement component is made of porous adsorption material and has a large specific surface area, which can efficiently adsorb impurities such as metal vapor and significantly improve the adsorption effect of the shielding cylinder.

[0022] 3. The heat dissipation holes on the side wall of the shielding cylinder and the spiral heat dissipation grooves on the outer surface of the shell work together to increase the heat dissipation area, accelerate the heat dissipation rate, effectively reduce the temperature of the shielding cylinder during operation, and ensure the normal operation of the vacuum interrupter.

[0023] 4. The reinforcing steel bars and elastic connecting plates on the outside of the shell work together. The reinforcing steel bars enhance the rigidity of the shell, while the elastic connecting plates give the shell a certain degree of elasticity, which improves the overall structural strength and stability of the shielding cylinder, enabling it to adapt to complex working environments. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall device according to an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional view of the overall device according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the outer shell of an embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the shielding cylinder and buffer assembly according to an embodiment of the present invention;

[0029] Figure 5 This is a cross-sectional view of the buffer component according to an embodiment of the present invention.

[0030] In the diagram: 1. Shielding cylinder body; 2. Outer shell; 3. Buffer assembly; 4. Rib; 5. Absorption enhancement component; 6. Buffer spring; 7. First buffer rod; 8. Second buffer rod; 9. Limiting block; 10. Limiting groove; 11. Heat dissipation hole; 12. Heat dissipation groove; 13. Reinforcing steel bar; 14. Elastic connecting piece; 15. Mounting flange; 16. Mounting hole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] A type of shielding cylinder for a vacuum interrupter, such as Figures 1-5 As shown, it includes:

[0033] The shielding cylinder body 1 and the outer shell 2 are provided. The shielding cylinder body 1 is installed inside the outer shell 2. Multiple sets of buffer components 3 are installed between the shielding cylinder body 1 and the outer shell 2 to buffer the shielding cylinder body 1. By setting the buffer components 3, when the shielding cylinder is subjected to external impact, the buffer spring 6 can undergo elastic deformation to absorb the impact energy. The relative sliding of the first buffer rod 7 and the second buffer rod 8 further buffers the impact force, thereby effectively protecting the shielding cylinder body 1 and improving the impact resistance of the shielding cylinder.

[0034] The shielding cylinder body 1 is a hollow cylindrical structure. Multiple raised ribs 4 are provided on the inner wall of the shielding cylinder body 1, and these ribs 4 are evenly distributed along the axial direction of the shielding cylinder body 1. The cross-section of each rib 4 is triangular, and the tip of each rib 4 faces the central axis of the cylinder body. A detachable adsorption enhancement component 5 is also provided inside the shielding cylinder body 1, and the adsorption enhancement component 5 is distributed intersectingly with the ribs 4. The ribs 4 on the inner wall of the shielding cylinder body 1 increase the contact area between the electric arc and the adsorption enhancement component 5. Simultaneously, the tips of the ribs 4 guide impurities such as metal vapor towards the adsorption enhancement component 5. The honeycomb structure of the adsorption enhancement component 5 is made of porous adsorption material, has a large specific surface area, and can efficiently adsorb impurities such as metal vapor, significantly improving the adsorption effect of the shielding cylinder.

[0035] The ribs 4 on the inner wall of the shielding cylinder 1 increase the surface area of ​​the shielding cylinder, thereby improving its adsorption capacity for metal vapor and charged particles. The triangular design of the ribs 4 with their tips pointing towards the central axis helps guide metal vapor and charged particles to gather towards the ribs 4, further enhancing the adsorption effect. The detachable adsorption enhancement component 5 not only has good adsorption performance itself, but its nano-level adsorption coating significantly improves the adsorption efficiency for metal vapor and charged particles. It is also easy to replace after adsorption saturation, ensuring the shielding cylinder continues to work efficiently.

[0036] In a preferred embodiment of this invention, the buffer assembly 3 includes a buffer spring 6, a first buffer rod 7, and a second buffer rod 8. One end of the first buffer rod 7 is fixedly connected to the inner wall of the outer shell 2, and one end of the second buffer rod 8 is fixedly connected to the outer wall of the shielding cylinder 1. The end of the first buffer rod 7 away from the outer shell 2 is sleeved with the end of the second buffer rod 8 away from the shielding cylinder 1, and the inner diameter of the first buffer rod 7 is equal to the outer diameter of the second buffer rod 8. When the shielding cylinder is subjected to external impact, the buffer spring 6 can undergo elastic deformation, absorbing the impact energy using its own elastic properties, converting the external impact force into the elastic potential energy of the spring, thereby reducing the direct impact force on the shielding cylinder 1. The first buffer rod 7 and the second buffer rod 8 are sleeved together and can slide relative to each other when subjected to impact. This relative sliding further buffers the impact force, dispersing and alleviating the impact force during the sliding process of the first buffer rod 7 and the second buffer rod 8. Meanwhile, the limiting block 9 on the outer wall of the second buffer rod 8 is adapted to the limiting groove 10 on the inner wall of the first buffer rod 7 to prevent the first buffer rod 7 and the second buffer rod 8 from separating during relative movement, ensuring that the buffer assembly 3 can stably play a buffering role, effectively protecting the shielding cylinder 1, making it less prone to damage when subjected to impact, and thus ensuring the normal operation and stable performance of the vacuum interrupter shielding cylinder.

[0037] In a preferred embodiment of this invention, two limiting blocks 9 are fixedly installed on the outer wall of the second buffer rod 8, and a limiting groove 10 is formed on the inner wall of the first buffer rod 7. The limiting blocks 9 are adapted to the limiting groove 10. Through the cooperation of the limiting blocks 9 and the limiting groove 10, the first buffer rod 7 and the second buffer rod 8 can be prevented from separating during relative movement, thus ensuring the stability of the buffer assembly 3.

[0038] In a preferred embodiment of this invention, the shielding cylinder body 1 has multiple heat dissipation holes 11 on its side wall, and the outer surface of the outer shell 2 has spirally arranged heat dissipation grooves 12. The arrangement of the heat dissipation holes 11 and heat dissipation grooves 12 can increase the heat dissipation area, improve heat dissipation efficiency, and effectively reduce the temperature of the shielding cylinder.

[0039] In a preferred embodiment of this invention, the adsorption enhancement component 5 has a honeycomb structure made of porous adsorption material, and its outer side is provided with a snap-fit ​​structure that matches the inner wall of the cylinder for easy installation and disassembly. A nano-scale adsorption coating is also coated on the surface of the adsorption enhancement component 5 to further improve its adsorption capacity for metal vapor and charged particles. The detachable adsorption enhancement component 5 not only possesses excellent adsorption performance itself, but its nano-scale adsorption coating significantly enhances the adsorption efficiency for metal vapor and charged particles, and it is easy to replace after adsorption saturation, ensuring the shielding cylinder continues to operate efficiently.

[0040] In a preferred embodiment of this invention, multiple reinforcing steel bars 13 and multiple elastic connecting pieces 14 are uniformly installed on the exterior of the outer shell 2. The two ends of the reinforcing steel bars 13 are fixedly connected to the two ends of the outer shell 2, and one end of each elastic connecting piece 14 is fixedly connected to the reinforcing steel bar 13, while the other end is attached to the surface of the outer shell 2. The reinforcing steel bars 13 are distributed axially along the outer shell 2 and are evenly spaced, acting like a "skeleton" for the outer shell 2, directly enhancing the overall structural strength of the outer shell 2. During the operation of the vacuum interrupter, the outer shell 2 needs to withstand various loads such as internal air pressure, thermal stress, and external mechanical forces. The presence of the reinforcing steel bars 13 enables the outer shell 2 to better resist these external forces, maintain its shape and structural integrity, and avoid deformation or cracking due to stress, providing a fundamental guarantee for the stable operation of the shielding cylinder. The elastic connecting pieces 14 can disperse and transfer the stress on the outer shell 2, preventing stress concentration from damaging the outer shell 2, effectively improving the fatigue resistance and structural stability of the shielding cylinder, extending its service life, and thus ensuring the long-term stable operation of the vacuum interrupter.

[0041] In a preferred embodiment of this utility model, the shielding cylinder body 1 is provided with annular mounting flanges 15 at both ends, and the mounting flanges 15 are provided with multiple mounting holes 16. The mounting flanges 15 and mounting holes 16 make the installation of the shielding cylinder more convenient and quick, facilitate assembly with other components of the vacuum interrupter, and improve production efficiency.

[0042] Working principle and usage process of this utility model:

[0043] In the actual installation of the vacuum interrupter shielding cylinder of this utility model, the shielding cylinder body 1 is first installed into the corresponding position of the vacuum interrupter through the mounting hole 16 on the mounting flange 15. When installing the buffer assembly 3, one end of the first buffer rod 7 is fixed to the inner wall of the outer shell 2, and one end of the second buffer rod 8 is fixed to the outer wall of the shielding cylinder body 1, so that the first buffer rod 7 and the second buffer rod 8 are sleeved together. The limiting block 9 is embedded in the limiting groove 10. Then, the buffer spring 6 is sleeved on the outside of the first buffer rod 7 and the second buffer rod 8 to ensure that the buffer spring 6 is in a normal working state.

[0044] When the vacuum interrupter is in operation, impurities such as metal vapor generated by the electric arc move towards the adsorption enhancement component 5 under the guidance of the ribs 4. The honeycomb structure of the adsorption enhancement component 5 utilizes the characteristics of its porous adsorption material to efficiently adsorb impurities such as metal vapor. At the same time, the heat generated by the shielding cylinder during operation is transferred to the outer shell 2 through the heat dissipation holes 11 on the side wall of the shielding cylinder body 1, and then dissipated into the surrounding environment through the spiral heat dissipation grooves 12 on the outer surface of the outer shell 2.

[0045] When subjected to external impact, the buffer spring 6 undergoes elastic deformation to absorb the impact energy. The first buffer rod 7 and the second buffer rod 8 slide relative to each other under the restriction of the limiting block 9 and the limiting groove 10, further buffering the impact force and protecting the shielding cylinder body 1. Meanwhile, the reinforcing steel bars 13 and elastic connecting pieces 14 on the outside of the outer shell 2 ensure the overall structural strength and stability of the shielding cylinder, enabling it to operate reliably in complex working environments.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims of this utility model.

Claims

1. A shielding cylinder for a vacuum interrupter, characterized in that, include: The shielding cylinder body (1) and the outer shell (2) are provided. The shielding cylinder body (1) is installed inside the outer shell (2). Multiple sets of buffer components (3) for buffering the shielding cylinder body (1) are installed between the shielding cylinder body (1) and the outer shell (2). The shielding cylinder body (1) is a hollow cylindrical structure; the inner wall of the shielding cylinder body (1) is provided with a plurality of protruding ribs (4), and the plurality of ribs (4) are evenly distributed along the axial direction of the shielding cylinder body (1); the cross section of the ribs (4) is triangular, and the tip of the ribs (4) faces the central axis of the cylinder body; the shielding cylinder body (1) is also provided with a detachable adsorption enhancement component (5), and the adsorption enhancement component (5) is intersected with the ribs (4).

2. The vacuum interrupter shielding cylinder according to claim 1, characterized in that, The buffer assembly (3) includes a buffer spring (6), a first buffer rod (7) and a second buffer rod (8). One end of the first buffer rod (7) is fixedly connected to the inner wall of the outer shell (2), and one end of the second buffer rod (8) is fixedly connected to the outer wall of the shielding cylinder (1). The end of the first buffer rod (7) away from the outer shell (2) is sleeved with the end of the second buffer rod (8) away from the shielding cylinder (1), and the inner diameter of the first buffer rod (7) is equal to the outer diameter of the second buffer rod (8).

3. The vacuum interrupter shielding cylinder according to claim 2, characterized in that, Two limiting blocks (9) are fixedly installed on the outer wall of the second buffer rod (8), and a limiting groove (10) is opened on the inner wall of the first buffer rod (7). The limiting blocks (9) are adapted to the limiting groove (10).

4. The vacuum interrupter shielding cylinder according to claim 1, characterized in that, The shielding cylinder (1) has multiple heat dissipation holes (11) on its side wall, and the outer surface of the outer shell (2) is provided with heat dissipation grooves (12) in a spiral shape.

5. A vacuum interrupter shielding cylinder according to claim 1, characterized in that, The adsorption enhancement component (5) has a honeycomb structure and is made of porous adsorption material. Its outer side is provided with a snap-fit ​​structure that matches the inner wall of the shielding cylinder (1) for easy installation and disassembly.

6. A vacuum interrupter shielding cylinder according to claim 1, characterized in that, The outer shell (2) is uniformly equipped with multiple reinforcing steel bars (13) and multiple elastic connecting pieces (14). The two ends of the reinforcing steel bars (13) are fixedly connected to the two ends of the outer shell (2), and one end of the elastic connecting piece (14) is fixedly connected to the reinforcing steel bars (13), while the other end is attached to the surface of the outer shell (2).

7. A vacuum interrupter shielding cylinder according to claim 1, characterized in that, The shielding cylinder body (1) has annular mounting flanges (15) at both ends, and the mounting flanges (15) have multiple mounting holes (16).

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