Supporting and buffering conductive device for moving end of GIS vacuum arc-extinguishing chamber

Abstract

The invention discloses a supporting and buffering conductive device for a moving end of a GIS (Gas Insulated Switchgear) vacuum arc-extinguishing chamber. The supporting and buffering conductive device aims to solve the problems of poor structural stability, difficulty in maintenance and large occupied space of the moving end of the traditional GIS vacuum arc-extinguishing chamber. The device comprises an isolation static contact seat, an insulation pull rod, a buffer assembly, a support conductor, a spring contact finger, a connection assembly and a vacuum arc-extinguishing chamber. The buffer assembly is connected with the insulating pull rod and is used for providing operating force for closing and opening of the vacuum arc-extinguishing chamber; a cylindrical structure in the supporting conductor provides supporting and guiding for the buffer assembly and the connecting assembly, and the supporting conductor is in sliding connection with the connecting assembly through a spring contact finger; in the closing process, current sequentially passes through the isolation static contact seat, the supporting conductor, the spring contact finger and the connecting assembly and enters the vacuum arc-extinguishing chamber. In the switching-on and switching-off process, the buffer assembly absorbs impact energy, the spring contact finger is arranged to enable the connecting assembly to slide along the inner wall of the supporting conductor, and the switching-on and switching-off action is completed in the vacuum arc-extinguishing chamber.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment, and particularly relates to a moving-end support buffer conducting device for a GIS vacuum interrupter. Background Art

[0002] The vacuum interrupter is an irreplaceable arc extinguishing and insulating core component in GIS (gas-insulated switchgear), and its performance directly affects the reliability, environmental friendliness and economy of the equipment. In the assembly of the vacuum interrupter components, the moving-end support conducting component is the core structure for realizing the movement of the moving contact and current conduction. It needs to meet the requirements of mechanical movement flexibility and electrical connection reliability at the same time, and is the key to balancing mechanical movement and electrical performance.

[0003] At present, the moving-end flexible connection of the GIS vacuum interrupter adopts a multi-layer annular flexible copper sheet laminated structure, which is fixed by layered welding with internal and external spacer rings. The inner ring is connected to the end of the moving conducting rod, and the outer ring is connected to the external mechanism. The flexible rotation is realized by combining the spherical connection sleeve with a pull rod and the spherical connection bushing, avoiding the bending and breaking of the insulating pull rod due to angular error. Its working sequence is as follows: when closing, the current forms a stable conduction path through the conducting clamp and the flexible copper sheet; when opening, the contacts are separated to generate a vacuum arc, which extinguishes when the current passes through zero, and the bellows retracts with the moving conducting rod, and the flexible structure buffers the mechanical impact. In the current structural form, the repeated bending stress generated by frequent closing and opening operations is likely to cause the copper wire to break, which is difficult to meet the requirements of high operation frequency and has poor stability; it is necessary to manually check the integrity of the copper sheet and copper wire regularly. If the copper wire breaks, it is necessary to cut the flexible connection conductor and re-weld it during maintenance, resulting in low maintenance efficiency and high maintenance cost; at present, most flexible connections adopt a multi-layer copper braid laminated or parallel design, occupying a large space. Summary of the Invention

[0004] (1) Object of the Invention

[0005] The object of the invention is to provide a moving-end support buffer conducting device for a GIS vacuum interrupter, aiming at solving the problems of poor structural stability, difficult maintenance and large space occupation existing in the moving end of the traditional GIS vacuum interrupter.

[0006] (2) Technical Solution

[0007] To solve the above problems, the invention provides a moving-end support buffer conducting device for a GIS vacuum interrupter, comprising: an isolating static contact seat, an insulating pull rod, a buffer assembly, a support conductor, spring fingers, a connection assembly and a vacuum interrupter;

[0008] The buffer assembly is connected to the insulating pull rod and is used to provide the operating force for the closing and opening of the vacuum interrupter;

[0009] The inner cylindrical structure of the support conductor provides support and guidance for the buffer assembly and the connection assembly, and the support conductor is slidably connected to the connection assembly through the spring finger;

[0010] During the closing process, the insulating pull rod drives the buffer assembly and the connection assembly to slide along the inside of the support conductor, and the connection assembly completes the closing action in the vacuum interrupter. The current sequentially passes through the isolating static contact seat, the support conductor, the spring finger, the connection assembly and enters the vacuum interrupter.

[0011] Preferably, the connection assembly includes a first connection part, a first guide ring, a connection housing and a second connection part;

[0012] One end of the first connection part is connected to the buffer assembly, the other end of the first connection part passes through the connection housing and is connected to the first end of the second connection part. The first guide ring is arranged on the outside of the connection housing, and the first guide ring is slidably connected to the inner wall of the support conductor. The connection housing is sleeved and fixed on the first end of the second connection part. The second end of the second connection part extends into the vacuum interrupter. The spring finger is arranged on the outside of the connection housing, and the spring finger is slidably connected to the inner wall of the support conductor.

[0013] Preferably, the connection assembly further includes a fastener, the fastener is fixed in the connection housing, and the fastener is fixedly connected to the second connection part.

[0014] Preferably, the buffer assembly includes a disc spring cylinder, disc springs and a second guide ring. The disc spring cylinder is connected to the insulating pull rod. The disc springs are arranged in the disc spring cylinder. The disc springs are sleeved on the first connection part. The second guide ring is arranged on the outside of the disc spring cylinder, and the second guide ring is slidably connected to the inner wall of the support conductor.

[0015] Preferably, the buffer assembly further includes a disc spring cylinder cover. The disc spring cylinder cover is sleeved on the first connection part. The disc spring cylinder cover is connected to the disc spring cylinder. A limit boss is arranged on the first connection part. The limit boss is arranged in the disc spring cylinder, and the limit boss abuts against the disc springs.

[0016] Preferably, a connection hole is formed at the first end of the second connection part. The first connection part is connected to the second connection part through the connection hole. The device further includes a loosening prevention assembly. The loosening prevention assembly is sleeved on the first connection part, and the loosening prevention assembly is connected to the end of the second connection part.

[0017] Preferably, the first connecting portion and the second connecting portion are connected by threads. The anti-loosening assembly includes an anti-loosening disc ring, a disc ring pressing piece, and a disc ring conduit. The anti-loosening disc ring is sleeved on the first connecting portion, the disc ring pressing piece is fixedly connected to the first connecting portion, the disc ring conduit is fixedly connected to the second connecting portion, and the anti-loosening disc ring is squeezed between the disc ring pressing piece and the disc ring conduit.

[0018] Preferably, the connecting assembly further includes a third guiding ring. The third guiding ring is arranged on the outer side of the connecting housing and is slidably connected to the inner wall of the supporting conductor. The first guiding ring and the third guiding ring are located on both sides of the spring finger.

[0019] Preferably, the device further includes a shielding ring. One end of the shielding ring is sleeved on the connecting assembly, and the other end of the shielding ring is sleeved on the outer side of the vacuum interrupter.

[0020] Preferably, the surfaces of the spring fingers and the inner wall of the supporting conductor are silver-plated.

[0021] In the present invention, by arranging a buffer assembly and a connecting assembly in the supporting conductor, during the opening and closing processes, the buffer assembly absorbs the impact energy. By arranging spring fingers, the connecting assembly slides along the inner wall of the supporting conductor, and the opening and closing actions are completed in the vacuum interrupter.

[0022] (III) Beneficial effects

[0023] The above technical solutions of the present invention have the following beneficial technical effects:

[0024] 1. By replacing the traditional soft connection solution with the sliding friction electrical connection of spring fingers, its multi-point contact design reduces the contact resistance and current density. Combining with the longitudinal magnetic field contact structure enhances the arc control ability. At the same time, the constant dynamic contact pressure significantly improves the current-carrying performance, mechanical stability, and adaptability to high-voltage scenarios;

[0025] 2. Adopting the sliding friction electrical connection solution of spring fingers, the spring fingers are slidably connected to the inner wall of the supporting conductor through multiple points, dispersing the pressure. The self-adaptive structure significantly improves the wear resistance and reduces the maintenance frequency;

[0026] 3. By the buffer assembly absorbing the closing impact force, the phenomenon of contact bounce is significantly reduced. At the same time, the moving and static contacts achieve closer contact through elastic pressure when fully closed, reducing the contact resistance and improving the electrical conductivity;

[0027] 4. By the connecting assembly and the buffer assembly sliding directionally on the inner wall of the supporting conductor to complete the opening and closing, and using the spring fingers to realize the electrical connection between the supporting conductor and the vacuum interrupter in the connecting assembly, the overall stability of the device is greatly improved. At the same time, it is also convenient for the maintenance of the internal structure of the supporting conductor and improves the work efficiency;

[0028] 5. This structure can protect the bellows and the conductive rod from impact damage, reduce the risk of air leakage caused by vibration, and thus extend the service life of the arc extinguishing chamber. Description of the Drawings

[0029] Figure 1 is a schematic diagram of the overall structure of a moving end support buffer conductive device for a GIS vacuum arc extinguishing chamber provided according to the present invention;

[0030] Figure 2 is a schematic diagram of the structure of a buffer component and a connection component of a moving end support buffer conductive device for a GIS vacuum arc extinguishing chamber provided according to the present invention.

[0031] Reference Signs:

[0032] 1. Isolation static contact seat;

[0033] 2. Insulating pull rod;

[0034] 3. Buffer component; 31. Disc spring cylinder; 32. Disc spring; 33. Second guide ring; 34. Disc spring cylinder cover;

[0035] 4. Support conductor;

[0036] 5. Spring finger;

[0037] 6. Connection component; 61. First connection part; 611. Limit boss; 62. First guide ring; 63. Connection housing; 64. Second connection part; 65. Fastener; 66. Third guide ring;

[0038] 7. Vacuum arc extinguishing chamber;

[0039] 8. Locking component; 81. Locking disc ring; 82. Disc ring pressing piece; 83. Disc ring conduit;

[0040] 9. Shielding ring. Detailed Embodiments

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention. In addition, in the following descriptions, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0042] The schematic diagram of the layer structure according to an embodiment of the present invention is shown in the accompanying drawings. These figures are not drawn to scale, where for the purpose of clarity, some details are enlarged and some details may be omitted. The various regions, shapes of the layers shown in the figures, as well as their relative sizes and positional relationships are merely exemplary, and in practice, there may be deviations due to manufacturing tolerances or technical limitations. And those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0043] Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] Bond Figure 1 And Figure 2, the present invention provides a moving-end support buffer conductive device for a GIS vacuum interrupter, hereinafter referred to as the device for short. The device includes: an isolating static contact base 1, an insulating pull rod 2, a buffer assembly 3, a support conductor 4, spring fingers 5, a connecting assembly 6 and a vacuum interrupter 7; the buffer assembly 3 is connected to the insulating pull rod 2 and is used to provide the operating force for the closing and opening of the vacuum interrupter 7; the inner cylindrical structure of the support conductor 4 provides support and guidance for the buffer assembly 3 and the connecting assembly 6, and the support conductor 4 is slidably connected to the connecting assembly 6 through the spring fingers 5; during the closing process, the insulating pull rod 2 drives the buffer assembly 3 and the connecting assembly 6 to slide along the inside of the support conductor 4, and the connecting assembly 6 completes the closing action inside the vacuum interrupter 7. The current sequentially passes through the isolating static contact base 1, the support conductor 4, the spring fingers 5, the connecting assembly 6 and enters the vacuum interrupter 7. Specifically, the isolating static contact base 1, as the starting component for current input, is the source of the entire conductive circuit; the insulating pull rod 2 is connected to the buffer assembly 3 and transmits the external operating force to the buffer assembly 3 to drive the closing and opening actions of the vacuum interrupter 7; the buffer assembly 3 is connected to the insulating pull rod 2, receives the operating force transmitted by the insulating pull rod 2, and provides the required operating force for the closing and opening of the vacuum interrupter 7; the inner part of the support conductor 4 is arranged in a cylindrical structure to provide support and guidance for the buffer assembly 3 and the connecting assembly 6, ensuring their stability and accuracy during the movement. At the same time, it is slidably connected to the connecting assembly 6 through the spring fingers 5 to form a part of the conductive circuit; the spring fingers 5 play the role of sliding connection and conduction, enabling electrical connection between the support conductor 4 and the connecting assembly 6 and maintaining good conductive performance during the sliding process of the connecting assembly 6; the connecting assembly 6 slides along the inside of the support conductor 4 under the drive of the insulating pull rod 2 and the buffer assembly 3, and finally completes the closing action inside the vacuum interrupter 7; after the connecting assembly 6 completes the closing action therein, the current enters the vacuum interrupter 7 to realize the conduction of the circuit. The opening action is opposite to the closing action and will not be elaborated here.

[0046] It should be noted that the specific structure of the spring fingers 5 is not limited here. It can be a structure similar to a circular ring, sleeved on the outside of the connecting assembly 6, and the spring fingers 5 are slidably connected to the complete circular inner wall of the support conductor 4; or it can be a structure of multiple spring fingers 5 evenly distributed on the outside of the connecting assembly 6, and the multiple spring fingers 5 are slidably connected to multiple points on the inner wall of the support conductor 4. As long as the sliding connection and conduction between the support conductor 4 and the connecting assembly 6 can be realized.

[0047] In the present invention, a buffer component 3 and a connection component 6 are arranged inside the support conductor 4. During the opening and closing process, the buffer component 3 absorbs the impact energy. By arranging the spring finger 5, the connection component 6 slides along the inner wall of the support conductor 4, and the opening and closing actions are completed in the vacuum interrupter 7. Through such an arrangement, the sliding friction electrical connection of the spring finger 5 is adopted to replace the traditional flexible connection scheme. Its multi-point contact design reduces the contact resistance and current density. Combining with the longitudinal magnetic field contact structure enhances the arc control ability. At the same time, the constant dynamic contact pressure significantly improves the current-carrying performance, mechanical stability and adaptability to high-voltage scenarios; the spring finger 5 is connected to the inner wall of the support conductor 4 through multi-point sliding connection, dispersing the pressure. The adaptive structure significantly improves the wear resistance and reduces the maintenance frequency; the buffer component 3 absorbs the closing impact force, significantly reduces the contact bounce phenomenon, and at the same time enables the moving and static contacts to achieve closer contact through elastic pressure when fully closed, reducing the contact resistance and improving the electrical conductivity; the connection component 6 and the buffer component 3 slide directionally on the inner wall of the support conductor 4 to complete the opening and closing, and the spring finger 5 is used to realize the electrical connection between the support conductor 4 and the vacuum interrupter 7 in the connection component 6, greatly improving the overall stability of the device. At the same time, it is also convenient for the maintenance of the internal structure of the support conductor 4 and improves the working efficiency; this structure can protect the bellows and the conductive rod from impact damage, reduce the risk of air leakage caused by vibration, and thus extend the service life of the interrupter.

[0048] It should be noted that the specific structure of the connection component 6 is not limited here, nor is the specific way for the connection component 6 to achieve sliding inside the support conductor 4. In a preferred case, the connection component 6 includes a first connection part 61, a first guide ring 62, a connection housing 63 and a second connection part 64; one end of the first connection part 61 is connected to the buffer component 3, the other end of the first connection part 61 passes through the connection housing 63 and is connected to the first end of the second connection part 64. The first guide ring 62 is arranged outside the connection housing 63, and the first guide ring 62 is slidably connected to the inner wall of the support conductor 4. The connection housing 63 is sleeved and fixed at the first end of the second connection part 64. The second end of the second connection part 64 extends into the vacuum interrupter 7, and the spring finger 5 is arranged outside the connection housing 63, and the spring finger 5 is slidably connected to the inner wall of the support conductor 4.

[0049] Specifically, one end of the first connecting portion 61 is connected to the buffer component 3 to receive the operating force transmitted by the buffer component 3, and the other end passes through the connecting shell 63 to be connected to the second connecting portion 64, thereby playing the role of force transmission and connection; the first guide ring 62 is arranged on the outside of the connecting shell 63, and can be a snap-on connection or a mounting groove of the first guide ring 62 is arranged on the outside of the connecting shell 63. The first guide ring 62 is slidably connected to the inner wall of the supporting conductor 4, and a sliding track or a sliding groove can be arranged in the support body, or no other structure is arranged on the inner wall of the supporting conductor 4, which can provide guidance for the sliding of the connecting component 6 to ensure its movement The accuracy of the direction is sufficient; the connecting shell 63 is sleeved and fixed on the first end of the second connecting part 64, which plays the role of protecting and fixing the second connecting part 64, and at the same time provides an installation position for the spring contact finger 5 and the first guide ring 62; the first end of the second connecting part 64 is connected to the first connecting part 61, and the second end extends into the vacuum arc chamber 7, and completes the closing action in the vacuum arc chamber 7 during the closing process to realize the conduction of current; the spring contact finger 5 is arranged on the outside of the connecting shell 63, and is slidably connected to the inner wall of the supporting conductor 4, and maintains electrical connection with the supporting conductor 4 during the sliding process of the connecting component 6 to ensure smooth conduction of current.

[0050] Through such an arrangement, the sliding connection structure between the first guide ring 62 and the inner wall of the supporting conductor 4 provides precise guidance for the sliding of the connecting assembly 6, so that the connecting assembly 6 can accurately move in the supporting conductor 4, thereby improving the accuracy and reliability of the closing action. The structure in which the spring contact finger 5 is arranged on the outside of the connecting housing 63 and is slidably connected to the inner wall of the supporting conductor 4 ensures that the spring contact finger 5 always maintains good electrical contact with the supporting conductor 4 during the sliding process of the connecting assembly 6, thereby improving the stability of the conductive performance.

[0051] It should be noted that the specific connection method between the second connecting part 64 and the connecting shell 63 is not limited here. It can be a screw connection, a snap connection or an interference fit connection. In a preferred case, the connecting assembly 6 also includes a fastener 65, and the fastener 65 is fixed in the connecting shell 63, and the fastener 65 is fixedly connected to the second connecting part 64. Specifically, the fastener 65 is fixed in the connecting shell 63, fixedly connected to the second connecting part 64 and conductive, ensuring the transmission of force and the stability and conductivity of the structure. Through such an arrangement, the fastener 65 tightly connects the connecting shell 63 and the second connecting part 64, thereby enhancing the overall structural stability of the connecting assembly 6, making the connecting assembly 6 not easy to loosen when subjected to operating force and current shock, improving the reliability of the opening and closing action, and ensuring the normal operation of the equipment.

[0052] In a preferred embodiment, the buffer assembly 3 includes a disc spring cylinder 31, a disc spring 32, and a second guide ring 33. The disc spring cylinder 31 is connected to the insulating pull rod 2. The disc spring 32 is disposed within the disc spring cylinder 31 and sleeved on the first connection portion 61. The second guide ring 33 is arranged outside the disc spring cylinder 31 and is slidably connected to the inner wall of the support conductor 4. Specifically, the disc spring cylinder 31 is connected to the insulating pull rod 2, receives the operating force transmitted by the insulating pull rod 2, and transmits it to the disc spring 32. The disc spring 32 is disposed within the disc spring cylinder 31 and sleeved on the first connection portion 61. During the closing process, the disc spring 32 is compressed, absorbs the kinetic energy during closing, plays a buffering role, and reduces the rigid impact during closing. When opening, the disc spring 32 releases energy to assist the opening operation. The second guide ring 33 is arranged outside the disc spring cylinder 31 and is slidably connected to the inner wall of the support conductor 4, providing guidance for the movement of the disc spring cylinder 31 and ensuring the accuracy of the movement direction of the buffer assembly 3.

[0053] With such an arrangement, the structure in which the disc spring 32 is disposed within the disc spring cylinder 31 and sleeved on the first connection portion 61 enables it to effectively absorb kinetic energy during closing, convert the rigid impact into elastic potential energy, reduce the impact force on the equipment components, and extend the service life of the equipment. The sliding connection structure between the second guide ring 33 and the inner wall of the support conductor 4 provides accurate guidance for the movement of the disc spring cylinder 31, ensures the stability and accuracy of the movement of the buffer assembly 3, and improves the reliability of the closing and opening operations.

[0054] In a preferred embodiment, the buffer assembly 3 further includes a disc spring cylinder cover 34. The disc spring cylinder cover 34 is sleeved on the first connection portion 61 and is connected to the disc spring cylinder 31. A limiting boss 611 is provided on the first connection portion 61. The limiting boss 611 is disposed within the disc spring cylinder 31 and abuts against the disc spring 32. Specifically, the disc spring cylinder cover 34 is sleeved on the first connection portion 61 and is connected to the disc spring cylinder 31. During the closing process, the disc spring cylinder cover 34 moves along with the movement of the disc spring cylinder 31 and, at the same time, cooperates with the limiting boss 611 to limit the stroke of the first connection portion 61 and the disc spring 32. The limiting boss 611 is provided on the first connection portion 61, located within the disc spring cylinder 31, and abuts against the disc spring 32 to achieve stroke limitation of the disc spring 32 during compression and release.

[0055] With such an arrangement, the limiting boss 611 abuts against the disc spring 32 to achieve controllability of the compression direction and formation of the disc spring 32, avoid deflection. At the same time, the limiting boss 611 can ensure that the force transmitted by the disc spring 32 to the first connection portion 61 is evenly dispersed and transmitted along the axis of the first connection portion 61, which is beneficial to the stability between the buffer assembly 3 and the connection assembly 6.

[0056] It should be noted that there is no limitation on the specific connection method between the first connecting portion 61 and the second connecting portion 64 here. It can be a fixed connection of two ends, such as setting a docking member to achieve a clamping or screwing connection method, or it can be through plugging or welding, etc., as long as the fixed connection between the two can be achieved. In a preferred case, a connection hole is formed at the first end of the second connecting portion 64, and the first connecting portion 61 is connected to the second connecting portion 64 through the connection hole. The device further includes a loosening prevention component 8, and the loosening prevention component 8 is sleeved on the first connecting portion 61 and is connected to the end of the second connecting portion 64. Specifically, the connection hole is located at the first end of the second connecting portion 64, and the first connecting portion 61 is connected to the second connecting portion 64 through the connection hole to achieve force transmission and structural connection; the loosening prevention component 8 is sleeved on the first connecting portion 61 and is connected to the end of the second connecting portion 64 to prevent the connection between the first connecting portion 61 and the second connecting portion 64 from loosening, ensuring the tight connection between the first connecting portion 61 and the second connecting portion 64 and improving the structural stability of the device. Further, the first connecting portion 61 and the second connecting portion 64 are connected by a threaded connection. The loosening prevention component 8 includes a loosening prevention disc spring 81, a disc spring pressing piece 82, and a disc spring conduit 83. The loosening prevention disc spring 81 is sleeved on the first connecting portion 61, the disc spring pressing piece 82 is fixedly connected to the first connecting portion 61, and the disc spring conduit 83 is fixedly connected to the second connecting portion 64. The loosening prevention disc spring 81 is pressed between the disc spring pressing piece 82 and the disc spring conduit 83. Specifically, the first connecting portion 61 and the second connecting portion 64 are connected by a threaded connection to achieve mechanical connection and force transmission between the two, and at the same time achieve detachable connection between the two, which is convenient for maintenance and installation. At the same time, the embedded insertion connection method can further save space; the disc spring is a disc-shaped spring that generates radial or axial elastic force through non-linear compression characteristics. When the threaded connection is affected by vibration or impact, the elastic deformation of the disc spring can compensate for the loss of the pre-tightening force and prevent loosening. The loosening prevention disc spring 81 is sleeved on the first connecting portion 61 and is pressed between the disc spring pressing piece 82 and the disc spring conduit 83. The disc spring pressing piece 82 is fixedly connected to the first connecting portion 61, and the disc spring conduit 83 is fixedly connected to the second connecting portion 64. Through the generated frictional force and elastic force, the loosening of the threaded connection is prevented.

[0057] Through such a setting, the structure in which the loosening prevention disc spring 81 is pressed between the disc spring pressing piece 82 and the disc spring conduit 83 generates a strong frictional force and elastic force, effectively preventing the loosening of the threaded connection. Even when the device is affected by factors such as vibration during operation, the connection stability can be maintained. This loosening prevention structure can continuously play a role during the long-term operation of the device, reducing equipment failures and maintenance costs caused by connection loosening, and improving the reliability and service life of the device.

[0058] In a preferred embodiment, the connection assembly 6 further includes a third guiding ring 66 disposed on the outer side of the connection housing 63. The third guiding ring 66 is slidably connected to the inner wall of the support conductor 4. The first guiding ring 62 and the third guiding ring 66 are located on both sides of the spring finger 5. Specifically, the third guiding ring 66 is disposed on the outer side of the connection housing 63 and is slidably connected to the inner wall of the support conductor 4. Together with the first guiding ring 62, it provides guidance for the sliding of the connection assembly 6, further improving the stability and accuracy of the movement of the connection assembly 6. By arranging the first guiding ring 62 and the third guiding ring 66 on both sides of the spring finger 5, this layout can better ensure the contact stability between the spring finger 5 and the support conductor 4, while improving the overall movement stability of the connection assembly 6. Through such a setting, the structure in which the third guiding ring 66 and the first guiding ring 62 jointly provide guidance for the connection assembly 6 makes the sliding of the connection assembly 6 in the support conductor 4 more stable and accurate, reduces the movement deviation, and improves the reliability of the closing operation.

[0059] In a preferred embodiment, the device further includes a shielding ring 9. One end of the shielding ring 9 is sleeved on the connection assembly 6, and the other end of the shielding ring 9 is sleeved on the outer side of the vacuum interrupter 7. Specifically, in the device, the support conductor 4 and the vacuum interrupter 7 are connected through the connection assembly 6. The shielding ring 9 is disposed at the connection. The shielding ring 9 forms an integral structure with the housing of the vacuum interrupter 7 through mechanical fixation, and is coupled with the conduction path of the support conductor 4 at the same time, ensuring uniform electric field distribution in the high-voltage current path, reducing the risk of insulation breakdown, and ensuring the long-term stable operation of the device. The shielding ring 9 can protect the vacuum interrupter 7 and other components from the influence of the electric field, extend the service life of the components, and reduce the maintenance cost of the equipment.

[0060] In a preferred embodiment, the surface of the spring finger 5 and the inner wall of the support conductor 4 are silver-plated. Silver has good electrical conductivity and oxidation resistance. Silver plating can reduce the contact resistance, improve the electrical conductivity, and at the same time reduce oxidation corrosion and extend the service life of the components. Through such a setting, the silver plating reduces the contact resistance between the spring finger 5 and the inner wall of the support conductor 4, enables the current to pass more smoothly, reduces the energy loss and heating phenomenon, and improves the efficiency and reliability of the equipment. The oxidation resistance of silver makes the silver-plated spring finger 5 and the inner wall of the support conductor 4 not easily oxidized and corroded, extends the service life of the components, and reduces the maintenance cost of the equipment.

[0061] It should be noted that for other electrically connected structures in the device, silver plating measures can also be adopted at the connection. For example, during the electrical connection between the second connection part 64 and the locking part, silver plating can also be performed on the connecting surfaces of the two without affecting their connection strength. The present invention also does not limit the specific setting method and connection relationship of the above device in the GIS, as long as the device can be applied in the GIS and achieve the arc extinguishing effect.

[0062] It should be understood that the above specific embodiments of the present invention are only used for illustrative explanation or interpretation of the principles of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A moving end support buffer conductive device for a GIS vacuum interrupter, characterized in that, The device includes: an isolating static contact base (1), an insulating pull rod (2), a buffer assembly (3), a support conductor (4), spring fingers (5), a connection assembly (6), and a vacuum interrupter (7); The buffer assembly (3) is connected to the insulating pull rod (2) and is used to provide the operating force for the closing and opening of the vacuum interrupter (7); The inner cylindrical structure of the support conductor (4) provides support and guidance for the buffer assembly (3) and the connection assembly (6), and the support conductor (4) is slidably connected to the connection assembly (6) through the spring fingers (5); During the closing process, the insulating pull rod (2) drives the buffer assembly (3) and the connection assembly (6) to slide along the inside of the support conductor (4), and the connection assembly (6) completes the closing action inside the vacuum interrupter (7). The current sequentially passes through the isolating static contact base (1), the support conductor (4), the spring fingers (5), the connection assembly (6), and enters the vacuum interrupter (7).

2. The device according to claim 1, characterized in that, The connection assembly (6) includes a first connection part (61), a first guide ring (62), a connection housing (63), and a second connection part (64); One end of the first connection part (61) is connected to the buffer assembly (3), the other end of the first connection part (61) passes through the connection housing (63) and is connected to the first end of the second connection part (64). The first guide ring (62) is arranged on the outside of the connection housing (63), and the first guide ring (62) is slidably connected to the inner wall of the support conductor (4). The connection housing (63) is sleeved and fixed on the first end of the second connection part (64). The second end of the second connection part (64) extends into the vacuum interrupter (7). The spring fingers (5) are arranged on the outside of the connection housing (63), and the spring fingers (5) are slidably connected to the inner wall of the support conductor (4).

3. The device according to claim 2, characterized in that, The connection assembly (6) further includes a fastener (65), the fastener (65) is fixed inside the connection housing (63), and the fastener (65) is fixedly connected to the second connection part (64).

4. The device according to claim 3, characterized in that, The buffer assembly (3) includes a disc spring cylinder (31), disc springs (32), and a second guide ring (33). The disc spring cylinder (31) is connected to the insulating pull rod (2), the disc springs (32) are arranged inside the disc spring cylinder (31), the disc springs (32) are sleeved on the first connection part (61), the second guide ring (33) is arranged on the outside of the disc spring cylinder (31), and the second guide ring (33) is slidably connected to the inner wall of the support conductor (4).

5. The device according to claim 4, characterized in that, The buffer assembly (3) further includes a disc spring cylinder cover (34), the disc spring cylinder cover (34) is sleeved on the first connection part (61), the disc spring cylinder cover (34) is connected to the disc spring cylinder (31). A limit boss (611) is arranged on the first connection part (61), the limit boss (611) is arranged inside the disc spring cylinder (31), and the limit boss (611) abuts against the disc springs (32).

6. The device according to claim 2, characterized in that A connection hole is formed at the first end of the second connection part (64). The first connection part (61) is connected to the second connection part (64) through the connection hole. The device further includes a loosening prevention component (8). The loosening prevention component (8) is sleeved on the first connection part (61), and the loosening prevention component (8) is connected to the end of the second connection part (64).

7. The device according to claim 6, characterized in that, The first connection part (61) and the second connection part (64) are connected by threads. The loosening prevention component (8) includes a loosening prevention disc ring (81), a disc ring pressing piece (82), and a disc ring conduit (83). The loosening prevention disc ring (81) is sleeved on the first connection part (61). The disc ring pressing piece (82) is fixedly connected to the first connection part (61). The disc ring conduit (83) is fixedly connected to the second connection part (64). The loosening prevention disc ring (81) is squeezed between the disc ring pressing piece (82) and the disc ring conduit (83).

8. The device according to claim 2, characterized in that, The connection component (6) further includes a third guiding ring (66). The third guiding ring (66) is arranged on the outer side of the connection housing (63). The third guiding ring (66) is slidably connected to the inner wall of the support conductor (4). The first guiding ring (62) and the third guiding ring (66) are located on both sides of the spring finger (5).

9. The device according to claim 1, characterized in that, The device further includes a shielding ring (9). One end of the shielding ring (9) is sleeved on the connection component (6), and the other end of the shielding ring (9) is sleeved on the outer side of the vacuum interrupter (7).

10. The device according to claim 1, characterized in that, The surface of the spring finger (5) and the inner wall of the support conductor (4) are subjected to silver plating treatment.

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