Vacuum arc-extinguishing chamber with length-adjustable conducting rod

By installing a ring-type telescopic rod outside the static conductive rod of the vacuum arc extinguishing chamber and combining the filling hole and the extrusion hole, the pole-less adjustment of the length of the conductive rod and the guarantee of the conductive area is achieved, which solves the problem of limited adjustment of the existing vacuum arc extinguishing chamber length, and improves adaptability and use performance.

CN223123817UActive Publication Date: 2025-07-18NINGBO XUANGUANG VACUUM ELECTRIC CO LTD
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Patent Information

Application Number
CN202421805015.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-29
Publication Date
2025-07-18
Estimated Expiration
2034-07-29

AI Technical Summary

Technical Problem

The length adjustment of the conductive rod length of the existing vacuum arc extinguishing chamber is limited by the length of the conductive rod, which cannot meet the adjustment requirements of non-multiple lengths, resulting in a large usage limitation.

Method used

A ring-type telescopic rod is installed outside the static conductive rod, and the telescopic rod is achieved through threaded connections, combining the filling hole and the extrusion hole to achieve pole-less adjustment of the conductive rod length, and filling the conductive gel to ensure the conductive area.

Benefits of technology

The pole-free adjustment of the length of the conductive rod is achieved, which reduces usage restrictions and is more adaptable. The gaps are avoided by filling the conductive gel to affect the conductive effect and improve the performance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a vacuum arc-extinguishing chamber with a length-adjustable conducting rod, and belongs to the field of electrical technology. According to the utility model, one end, extending out of the cylindrical shell, of the static conducting rod is provided with the external thread, one end of the lantern ring type telescopic rod is provided with the telescopic hole with the internal thread, and the lantern ring type telescopic rod is sleeved outside the end, provided with the external thread, of the static conducting rod in a threaded manner, so that the lantern ring type telescopic rod can move relative to the static conducting rod by screwing the lantern ring type telescopic rod; meanwhile, the requirement for adjusting any length in the adjusting range can be met by screwing different turns, the adaptability is better, the use limitation is smaller, in addition, the sleeve ring type telescopic rod is provided with a filling hole and an extrusion hole which are communicated with the telescopic hole and provided with a sealing cover, and the sealing cover is arranged on the sleeve ring type telescopic rod. The use requirement that conductive gel enters and exits from the telescopic hole can be met, the adjusted telescopic hole can be filled with the conductive gel, the conductive area is effectively guaranteed, the problem that the conductive effect is affected due to the fact that gaps are formed after adjustment is solved, and the use performance is better.
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Description

Technical Field

[0001] The utility model relates to the technical field of electricity, and particularly relates to a vacuum interrupter with an adjustable length of a conductive rod. Background Art

[0002] As a common structure in the power grid system, the vacuum interrupter can reduce the interference of the generated arc during the on-off process of the circuit, improve the power grid protection effect, and extend the service life of each electrical equipment in the power grid.

[0003] Currently, the existing vacuum interrupters on the market are usually of a fixed structure. For example, a lengthenable vacuum interrupter disclosed in Patent CN214505303U includes a housing, a static conductive rod, and a static end cover. During installation, the static end cover is arranged at one end of the housing, and one end of the static conductive rod extends out of the static end cover. A main connection thread is arranged at the end of the static conductive rod extending out of the static end cover. A circular connecting plate is arranged on the static end cover and around the static conductive rod. An auxiliary connection thread is arranged on the inner wall of the connecting plate. A number of lengthening conductive rods are also provided. One end of each lengthening conductive rod is provided with a threaded socket matching the main connection thread, and the other end is provided with a main connection thread, so that a number of lengthening conductive rods can be connected to the static conductive rod in an end-to-end manner, and the lengthening length can be controlled according to the number of connected lengthening conductive rods to meet the installation requirements in different-sized spaces. Although the above structure can already meet the use requirements of the conductive rod length adjustment, however, since the adjustment of its length is only achieved by increasing or decreasing the number of lengthening conductive rods, and the length of each lengthening conductive rod is fixed, when increasing or decreasing the length each time, the increased or decreased length needs to be a multiple of the length of the lengthening conductive rod. If the length to be increased or decreased does not belong to a multiple of the length of the lengthening conductive rod, the length adjustment cannot meet the use requirements, that is, the existing vacuum interrupter with an adjustable length of the conductive rod is affected by the length of the lengthening conductive rod itself during adjustment, and there are significant use limitations. Summary of the Invention

[0004] Aiming at the above problems existing in the prior art, the present invention aims to provide a vacuum interrupter with an adjustable length of a conductive rod. A sleeve-type telescopic rod is arranged outside the static conductive rod, and the sleeve-type telescopic rod is threadedly sleeved with the static conductive rod. At the same time, a perfusion hole and an extrusion hole are arranged at the end of the sleeve-type telescopic rod away from the connection with the static conductive rod, and a sealing cover is arranged on the perfusion hole and the extrusion hole. By screwing the sleeve-type telescopic rod to rotate relative to the static conductive rod, the telescopic movement of the sleeve-type telescopic rod on the static conductive rod is realized, so as to realize the adjustment of the total length and achieve stepless adjustment, thereby adapting to any length requirement within the adjustment range, reducing the use limitations, and improving the adaptability. In addition, a conductive gel is filled in the cavity formed between the sleeve-type telescopic rod and the static conductive rod after the length is adjusted to ensure the conductive area and avoid the problem of affecting the conductive effect due to the formation of a gap after adjustment.

[0005] The specific technical solutions are as follows:

[0006] A vacuum arc extinguishing chamber with an adjustable conductive rod length comprises a cylinder shell, a static conductive rod and a static end cover, wherein the static end cover is arranged at one end of the cylinder shell, the static conductive rod is installed on the static end cover, and one end of the static conductive rod is located outside the cylinder shell, and the other end extends into the cylinder shell and is installed with a static contact. It has such characteristics and also comprises a sleeve-type telescopic rod, an end of the static conductive rod located outside the cylinder shell is provided with an external thread along its axial direction, one end of the sleeve-type telescopic rod is provided with a telescopic hole to form a sleeve, the sleeve is provided with an internal thread and is threadedly sleeved on the end of the static conductive rod with the external thread, a conductive gel is injected into the telescopic hole, an injection hole and an extrusion hole connected to the telescopic hole are provided on the sleeve-type telescopic rod, and sealing covers are provided at the injection hole and the extrusion hole.

[0007] In the above-mentioned vacuum interrupter with adjustable conductive rod length, the extrusion hole is located on the end surface of the end of the sleeve-type telescopic rod away from the telescopic hole.

[0008] In the above-mentioned vacuum arc extinguishing chamber with adjustable conductive rod length, the extrusion hole is an extension hole of the telescopic hole, and the internal thread of the collar extends into the extrusion hole.

[0009] In the above-mentioned vacuum interrupter with adjustable conductive rod length, a connecting flange is provided at one end of the sleeve-type telescopic rod away from the telescopic hole.

[0010] The above-mentioned vacuum arc extinguishing chamber with adjustable conductive rod length, wherein the connecting flange is an annular structure, and a circle of limiting ring is arranged on the outer wall of the end of the ring-type telescopic rod away from the telescopic hole. At the same time, a circle of annular grooves arranged at intervals from the limiting ring are also provided on the outer wall of the end of the ring-type telescopic rod where the limiting ring is provided, and the annular groove is located on the side of the limiting ring close to the static conductive rod, and a clamping ring is arranged in the limiting groove, and the connecting flange is sleeved on the outside of the ring-type telescopic rod and is located between the limiting ring and the clamping ring.

[0011] In the above-mentioned vacuum arc extinguishing chamber with adjustable conductive rod length, an avoidance gap is provided on the side of the connecting flange close to the limiting ring, the limiting ring is embedded in the avoidance gap, and the depth of the avoidance gap is consistent with the thickness of the limiting ring.

[0012] The above-mentioned vacuum arc extinguishing chamber with adjustable conductive rod length, wherein the sealing cover and the injection hole, as well as the sealing cover and the extrusion hole are all threadedly connected, and a sealing ring is sleeved on the sealing cover, and after the sealing cover is installed in place, the sealing ring is located in the injection hole and the extrusion hole.

[0013] In the above-mentioned vacuum arc extinguishing chamber with adjustable conductive rod length, the sealing cover is a fixing screw structure, and a sealing groove is provided at the front end of the sealing cover, and the sealing ring is located in the sealing groove.

[0014] The positive effects of the above technical solutions are as follows:

[0015] For the above vacuum interrupter with an adjustable length of the conductive rod, by providing a collar-type telescopic rod outside the static conductive rod and threadedly sleeving the collar-type telescopic rod on the static conductive rod. At the same time, a perfusion hole and an extrusion hole with a sealing cover are provided at one end of the collar-type telescopic rod away from the connection with the static conductive rod. By turning the collar-type telescopic rod relative to the static conductive rod, the telescopic movement of the collar-type telescopic rod on the static conductive rod is realized, thereby achieving the adjustment of the length of the conductive rod. Moreover, the adjustment distance can be determined by the number of turns of turning, meeting the needs of stepless adjustment and the requirement of adjusting to any length within the adjustment range. The use restrictions are smaller and the adaptability is better. In addition, the cavity formed between the collar-type telescopic rod and the static conductive rod after adjusting the length can be filled with conductive gel through the perfusion hole and the extrusion hole, effectively ensuring the conductive area and avoiding the problem of affecting the conductive effect due to the formation of voids after adjustment, thus improving the use performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an embodiment of a vacuum interrupter with an adjustable length of the conductive rod according to the present invention;

[0017] Figure 2 is Figure 1 an enlarged view of part A in

[0018] In the drawings: 1, cylinder shell; 2, static conductive rod; 3, static end cover; 4, static contact; 5, collar-type telescopic rod; 51, telescopic hole; 52, perfusion hole; 53, extrusion hole; 54, limiting ring; 55, card slot; 56, snap ring; 6, conductive gel; 7, sealing cover; 71, sealing ring; 72, sealing groove; 8, connecting flange; 81, avoidance notch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the following embodiments are combined with the attached Figure 1 to Figure 2 attached drawings to specifically illustrate the technical solutions provided by the present invention, but the following content is not a limitation of the present invention.

[0020] Figure 1 It is a structural diagram of an embodiment of a vacuum interrupter with an adjustable length of the conductive rod according to the present invention; Figure 2 is Figure 1 an enlarged view of part A in. As Figure 1 and Figure 2As shown, the vacuum arc extinguishing chamber with adjustable conductive rod length provided in this embodiment includes: a cylinder shell 1, a static conductive rod 2, a static end cover 3 and a sleeve-type telescopic rod 5. At this time, the cylinder shell 1 is made of ceramic material and is a cylindrical structure. The static end cover 3 is arranged at one end of the cylinder shell 1. At the same time, the static conductive rod 2 is installed on the static end cover 3 and one end is located outside the cylinder shell 1. The other end of the static conductive rod 2 extends into the cylinder shell 1, and a static contact 4 is installed on the end of the static conductive rod 2 extending into the cylinder shell 1, which provides conditions for the subsequent cooperation with the moving contact. It is worth pointing out that the other structures of the vacuum arc extinguishing chamber are the same as those of conventional vacuum arc extinguishing chambers on the market, which are common knowledge. Therefore, other specific structures are not repeated here.

[0021] Specifically, an external thread is provided along the axial direction of the end of the static conductive rod 2 located outside the cylindrical shell 1, that is, the end of the static conductive rod 2 located outside the cylindrical shell 1 is a threaded rod. At this time, a telescopic hole 51 is opened at one end of the sleeve-type telescopic rod 5 to form a sleeve, so that there is space at one end of the sleeve-type telescopic rod 5 to match the static conductive rod 2. In addition, the sleeve is provided with an internal thread, and during installation, the sleeve thread of the sleeve-type telescopic rod 5 is sleeved on the end of the static conductive rod 2 with an external thread, so that the threaded connection between the sleeve-type telescopic rod 5 and the static conductive rod 2 is realized, so that the sleeve-type telescopic rod 5 can be subsequently moved relative to the static conductive rod 2 by twisting the sleeve-type telescopic rod 5, and the length of the conductive rod can be adjusted, and the length adjustment can be controlled by the number of turns, so as to meet the stepless adjustment requirements, that is, to meet the requirements of any length adjustment within the adjustment range, with fewer usage restrictions and better adaptability. In addition, a conductive gel 6 is injected into the telescopic hole 51. Since the telescopic hole 51 moves relative to the static conductive rod 2 when the sleeve-type telescopic rod 5 is adjusted, the space of the telescopic hole 51 changes. At this time, the conductive gel 6 is injected into the telescopic hole 51 to fill the adjusted telescopic hole 51, thereby ensuring the conductive area, thereby effectively avoiding the problem of gaps formed after adjustment and affecting the conductive effect, thereby improving the performance. In addition, a perfusion hole 52 and an extrusion hole 53 connected to the telescopic hole 51 are provided on the sleeve-type telescopic rod 5, and a sealing cover 7 is provided at the perfusion hole 52 and the extrusion hole 53, which facilitates the injection of the conductive gel 6 into the telescopic hole 51 and the removal of the conductive gel 6 from the telescopic hole 51, thereby meeting the adjustment requirements under different lengths, and the structural design is more reasonable.

[0022] More specifically, the extrusion hole 53 is located on the end face of the ring-type telescopic rod 5 away from the end where the telescopic hole 51 is set. At this time, the extrusion hole 53 is arranged along the axial direction of the ring-type telescopic rod 5, so that it is convenient to take out the conductive gel 6 in the telescopic hole 51 through the extrusion hole 53, meet the use requirements of reducing the space of the telescopic hole 51, and the structural design is more reasonable.

[0023] More specifically, the extrusion hole 53 is an extension hole of the telescopic hole 51, achieving a straight-through connection between the extrusion hole 53 and the telescopic hole 51. At this time, the internal thread of the collar extends into the extrusion hole 53, making the aperture of the extrusion hole 53 the same as that of the telescopic hole 51. This not only facilitates processing but also enables the end of the static conductive rod 2 to extend into the extrusion hole 53 by turning the collar-type telescopic rod 5 later, and the conductive gel 6 in the telescopic hole 51 is extruded through the end face of the static conductive rod 2, so that the collar-type telescopic rod 5 can move toward the side of the static end cover 3, meeting the usage requirement of shortening the length of the conductive rod. Even if the conductive gel 6 dries and cakes after long-term use, the conductive gel 6 can be slowly pushed out by the static conductive rod 2, and the structural design is more reasonable.

[0024] More specifically, a connecting flange 8 is further provided at one end of the collar-type telescopic rod 5 away from the telescopic hole 51. Through the connecting flange 8, it is convenient to connect the conductive rod of the vacuum interrupter with external structural components, thus facilitating the stable installation of the vacuum interrupter in the power grid.

[0025] More specifically, the connecting flange 8 provided on the collar-type telescopic rod 5 is of an annular structure. At this time, a limiting ring 54 is further provided on the outer wall of one end of the collar-type telescopic rod 5 away from the telescopic hole 51, forming a limiting structure on the outer wall of the end of the collar-type telescopic rod 5 through the limiting ring 54. At the same time, an annular clamping groove 55 arranged at an interval from the limiting ring 54 is opened on the outer wall of the end of the collar-type telescopic rod 5 where the limiting ring 54 is provided. At this time, the annular clamping groove 55 is arranged on the side of the limiting ring 54 close to the static conductive rod 2, so that there is a space between the annular clamping groove 55 and the limiting ring 54. In addition, a clamping ring 56 is arranged in the limiting clamping groove 55. During installation, the connecting flange 8 is sleeved outside the collar-type telescopic rod 5 from one end of the collar-type telescopic rod 5 away from the limiting ring 54 and moved toward the end of the limiting ring 54. When the connecting flange 8 approaches the limiting ring 54, the clamping ring 56 is then snapped into the annular clamping groove 55, so that the connecting flange 8 can be located between the limiting ring 54 and the clamping ring 56, thus realizing the reliable installation of the connecting flange 8 on the collar-type telescopic rod 5. At the same time, the connecting flange 8 can also rotate relative to the collar-type telescopic rod 5, that is, when it is necessary to rotate the collar-type telescopic rod 5 due to adjustment, it can be adapted by the rotation of the connecting flange 8 itself relative to the collar-type telescopic rod 5, so as to always maintain the state of the connecting flange 8 relative to the external structural components, and the structural flexibility is better, ensuring that the adjusted connecting flange 8 can still meet the installation requirements.

[0026] More specifically, an avoidance notch 81 is further formed on one side of the connecting flange 8 close to the limiting ring 54. At this time, the limiting ring 54 is embedded into the avoidance notch 81, and the depth of the avoidance notch 81 is set to be the same as the thickness of the limiting ring 54, so that when the connecting flange 8 is restricted by the limiting ring 54, the limiting ring 54 can be hidden through the avoidance notch 81, thereby maintaining the flatness of the installation end face and improving the installation stability.

[0027] More specifically, it is set that both the sealing cover 7 and the perfusion hole 52 and the sealing cover 7 and the extrusion hole 53 are in threaded connection, which facilitates the disassembly and assembly of the sealing cover 7, and also makes the sealing cover 7 more stable and reliable after installation. And, a sealing ring 71 is sleeved on the sealing cover 7. During installation, when the sealing ring 71 is installed into the corresponding perfusion hole 52 or extrusion hole 53 and installed in place, the sealing ring 71 is located in the perfusion hole 52 and the extrusion hole 53, realizing the hidden installation of the sealing ring 71, and also preventing the overflow of the conductive gel 6, and the structural design is more reasonable.

[0028] More specifically, the sealing cover 7 is set as a tamper-proof screw structure, so that the whole sealing cover 7 is a screw rod structure, and the sealing cover 7 is screwed by controlling the structure on the end face of the sealing cover 7, so that the sealing cover 7 can be completely hidden in the corresponding perfusion hole 52 or extrusion hole 53, and can also maintain the flatness of the surface of the sleeve-type telescopic rod 5, which is convenient for installation. In addition, a sealing groove 72 is formed at the front end of the sealing cover 7. At this time, the sealing ring 71 is arranged in the sealing groove 72, ensuring the stability and reliability of the sealing ring 71 after being installed on the sealing cover 7.

[0029] As a preferred embodiment, a sealing ring groove is formed on the outer wall of the end of the static conductive rod 2 provided with an external thread, a sealing ring is arranged in the sealing ring groove, and when the sleeve thread sleeve of the sleeve-type telescopic rod 5 is sleeved on the static conductive rod 2, the sealing ring can always be in tight contact with the inner wall of the sleeve, realizing the sealing between the sleeve-type telescopic rod 5 and the static conductive rod 2, and the structural design is more reasonable.

[0030] The vacuum interrupter with an adjustable length of the conductive rod provided in this embodiment includes a cylinder shell 1, a static conductive rod 2, a static end cover 3, and a collar-type telescopic rod 5. By providing an external thread at one end of the static conductive rod 2 extending outside the cylinder shell 1, and providing a telescopic hole 51 with an internal thread at one end of the collar-type telescopic rod 5 and thread-sleeving it outside the end of the static conductive rod 2 with the external thread, the movement of the collar-type telescopic rod 5 relative to the static conductive rod 2 can be realized by screwing the collar-type telescopic rod 5, so as to meet the requirement of adjusting the length of the conductive rod. At the same time, the requirement of adjusting any length within the adjustment range can be met by screwing different numbers of turns, with better adaptability and fewer usage restrictions. In addition, a filling hole 52 and an extrusion hole 53 communicating with the telescopic hole 51 and provided with a sealing cover 7 are provided on the collar-type telescopic rod 5, which can meet the usage requirement of the conductive gel 6 entering and exiting the telescopic hole 51, so that the telescopic hole 51 after adjustment can be filled with the conductive gel 6, effectively ensuring the conductive area and avoiding the problem of affecting the conductive effect due to the formation of voids after adjustment, and the usage performance is better.

[0031] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention accordingly. For those skilled in the art, it should be able to realize that the solutions obtained by equivalent substitution and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum interrupter with an adjustable length of the conductive rod, comprising a cylinder shell, a static conductive rod and a static end cover. The static end cover is arranged at one end of the cylinder shell. The static conductive rod is installed on the static end cover, and one end of the static conductive rod is located outside the cylinder shell, and the other end extends into the cylinder shell and is installed with a static contact, characterized in that, It also includes a ring-type telescopic rod, wherein the static conductive rod is provided with an external thread along its axial direction at one end outside the cylindrical shell, a telescopic hole is provided at one end of the ring-type telescopic rod to form a ring, the ring is provided with an internal thread and is threadedly sleeved on the end of the static conductive rod with the external thread, a conductive gel is injected into the telescopic hole, a perfusion hole and an extrusion hole connected to the telescopic hole are provided on the ring-type telescopic rod, and sealing covers are provided at the perfusion hole and the extrusion hole.

2. The vacuum interrupter with an adjustable length of the conductive rod according to claim 1, wherein The extrusion hole is located on the end surface of the sleeve-type telescopic rod which is away from the end where the telescopic hole is set.

3. The vacuum interrupter with an adjustable length of the conductive rod according to claim 2, characterized in that, The extrusion hole is an extension hole of the telescopic hole, and the internal thread of the collar extends into the extrusion hole.

4. The vacuum interrupter with an adjustable length of the conductive rod according to claim 1, characterized in that, A connecting flange is arranged at one end of the sleeve-type telescopic rod away from the telescopic hole.

5. The vacuum interrupter with an adjustable length of the conductive rod according to claim 4, characterized in that, The connecting flange is an annular structure, and a circle of limiting ring is arranged on the outer wall of the end of the ring-type telescopic rod away from the telescopic hole. At the same time, a circle of annular grooves spaced apart from the limiting ring are also provided on the outer wall of the end of the ring-type telescopic rod provided with the limiting ring, and the annular groove is located on the side of the limiting ring close to the static conductive rod, and a clamping ring is arranged in the annular groove, and the connecting flange is sleeved on the outside of the ring-type telescopic rod and located between the limiting ring and the clamping ring.

6. The vacuum interrupter with an adjustable length of the conductive rod according to claim 5, characterized in that, A relief notch is provided on one side of the connecting flange close to the limiting ring, the limiting ring is embedded in the relief notch, and the depth of the relief notch is consistent with the thickness of the limiting ring.

7. The vacuum interrupter with an adjustable length of the conductive rod according to claim 1, wherein The sealing cover and the injection hole are both threadedly connected, and a sealing ring is sleeved on the sealing cover. After the sealing cover is installed in place, the sealing ring is located in the injection hole and the extrusion hole.

8. The vacuum interrupter with an adjustable length of the conductive rod according to claim 7, characterized in that, The sealing cover is a screw fixing structure, and a sealing groove is formed at the front end of the sealing cover, and the sealing ring is located in the sealing groove.