Detachable drop-out arrester

Abstract

The embodiment of the present disclosure provides a detachable drop-type lightning arrester, which comprises a lightning arrester pipe, a base, a connecting rod, a spring reset device and a limiting ring, wherein the lightning arrester pipe is connected with the base through threads; the connecting rod is fixed on the base; the spring reset device is arranged on the top of the connecting rod, wherein the spring reset device comprises an anti-deviation guide hole structure, a plurality of guide protrusions are arranged in the anti-deviation guide hole structure, and the plurality of guide protrusions are uniformly distributed on the inner wall of the anti-deviation guide hole structure; the spring reset device comprises a spring with a smooth plating layer; the spring reset device comprises a self-lubricating bushing to avoid the jamming phenomenon, the self-lubricating bushing is of a segmented structure and is provided with an elastic buckle; and the limiting ring is installed outside the spring reset device and is used for limiting a drop stroke. Through the scheme of the embodiment of the present disclosure, the jamming probability can be reduced.

Description

Technical Field

[0001] This application relates to the field of power system protection technology, specifically to a detachable drop-out surge arrester. Background Technology

[0002] Detachable drop-out surge arresters are devices installed in power systems primarily to protect electrical equipment from overvoltage damage. They feature detachability and automatic drop-out functionality for easy maintenance and safety isolation. Through a special structural design, these devices achieve manual or automatic disconnection, thereby cutting off faulty circuits and ensuring the normal operation of other parts of the power grid. However, in practical use, these surge arresters may encounter jamming problems. That is, when activation is required, friction between components, dust accumulation, or aging of the mechanism may prevent them from successfully detaching or dropping. This directly affects the reliability of their protective function and may endanger the safe and stable operation of the power system. Reducing the probability of jamming is a crucial issue that needs attention in this technical field. Summary of the Invention

[0003] In view of this, the present disclosure provides a detachable drop-out surge arrester, which at least partially solves the problems existing in the prior art.

[0004] This application discloses a detachable drop-out surge arrester, comprising: a surge tube, a base, a connecting rod, a spring reset device, and a limiting ring.

[0005] The surge arrester is connected to the base by a thread;

[0006] The connecting rod is fixed to the base;

[0007] The spring reset device is located at the top of the connecting rod, wherein the spring reset device includes an anti-displacement guide hole structure, and the anti-displacement guide hole structure is provided with multiple sets of guide protrusions, which are evenly distributed on the inner wall of the anti-displacement guide hole structure.

[0008] The spring reset device includes a spring with a smooth coating.

[0009] The spring reset device includes a self-lubricating bushing to prevent jamming. The self-lubricating bushing has a segmented structure and is equipped with elastic buckles.

[0010] The limiting ring is installed outside the spring reset device to limit the drop travel.

[0011] In one embodiment, the spring reset device further includes a fixed base, which is mounted on the top end of the connecting rod.

[0012] In one specific embodiment, the limiting ring has multiple flexible sealing strips inside to prevent external impurities from entering.

[0013] In one specific embodiment, a buffer ring is provided between the base and the connecting rod.

[0014] In one specific embodiment, the anti-offset guide hole structure is provided with a centering guide groove so that the spring will not be laterally offset during operation.

[0015] In one specific embodiment, the self-lubricating bushing is provided with supporting ribs on its outer side.

[0016] In one specific embodiment, the spring with a smooth coating is provided with limit end caps at both the upper and lower ends to constrain the reset stroke range and reduce the probability of jamming.

[0017] In one specific embodiment, the upper part of the connecting rod has multiple sets of heat dissipation grooves.

[0018] In one specific embodiment, a preload adjustment ring is installed on the top of the spring reset device to adjust the initial stress of the spring.

[0019] This disclosure provides a detachable drop-out surge arrester, comprising: a surge tube, a base, a connecting rod, a spring reset device, and a limiting ring. The surge tube is threadedly connected to the base; the connecting rod is fixed to the base; the spring reset device is located at the top of the connecting rod, and includes an anti-displacement guide hole structure with multiple sets of guide protrusions evenly distributed on the inner wall of the anti-displacement guide hole structure; the spring reset device includes a spring with a smooth coating; the spring reset device includes a self-lubricating bushing to prevent jamming, the self-lubricating bushing having a segmented structure and elastic buckles; the limiting ring is installed outside the spring reset device to limit the drop stroke. This disclosure solves the problem of reducing the probability of jamming. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the exemplary embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2This is a schematic diagram of a half-section structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the threaded connection structure between the base and the connecting rod of the present invention;

[0024] Figure 4 This is a schematic diagram of the self-lubricating bushing structure of the present invention;

[0025] Figure 5 This is a partially enlarged structural diagram of the wear-resistant ceramic material of the present invention;

[0026] Figure 6 This is a partial cross-sectional structural diagram of the limiting ring of the present invention.

[0027] In the diagram: 1. Surge arrester; 2. Base; 3. Connecting rod; 4. Spring reset device; 5. Limiting ring; 6. Fixed base; 7. Guide protrusion; 8. Elastic buckle; 9. Wear-resistant ceramic material; 10. Flexible sealing strip; 11. Buffer ring; 12. Centering guide groove; 13. Support rib; 14. Limiting end cap; 15. Heat dissipation groove; 16. Pre-tightening adjustment ring; 41. Anti-deviation guide hole structure; 42. Self-lubricating bushing Detailed Implementation

[0028] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] like Figures 1-3 As shown, a detachable drop-out surge arrester according to this application includes a surge tube 1, a base 2, a connecting rod 3, a spring reset device 4, and a limiting ring 5. These components work together to solve the problem of jamming in traditional surge arresters during use, and also feature convenient disassembly and maintenance.

[0031] The surge arrester 1 is the main electrical component of the surge arrester, used to guide and release overvoltages, protecting equipment from damage caused by lightning strikes or transient overvoltages in the circuit. The surge arrester 1 is fixed to the base 2 via a threaded connection, allowing for easy removal and installation from the base 2. For example, an external thread can be provided at one end of the surge arrester 1, while a matching internal thread is provided at a corresponding position on the base 2; the two can be tightened or loosened by rotation.

[0032] The base 2 serves as the fixed base 6 for the entire surge arrester, supporting and connecting the various functional components within the arrester. The base 2 not only provides a stable mounting foundation for the surge arrester tube 1 but also supports the fixing structure of other components such as the connecting rod 3. To enhance the adaptability of the base 2 to the installation environment, it can be connected to external fixing facilities via metal flanges or other mechanical interfaces, ensuring structural stability and electrical safety.

[0033] The connecting rod 3 is fixed to the base 2, serving to support the entire surge arrester and transmitting the mechanical and electrical forces borne by the surge arrester 1 to the support point. The connecting rod 3 is typically made of high-strength material and is securely connected to the base 2 by welding or integral casting. For example, in specific applications, high-strength steel can be selected to ensure sufficient compressive strength and fatigue resistance, enabling reliable operation for extended periods even in harsh environments.

[0034] The spring reset device 4 is located at the top of the connecting rod 3. Its main function is to provide a stable elastic restoring force, allowing the surge arrester to quickly return to its normal state after triggering. The spring reset device 4 includes an anti-offset guide hole structure 41, which prevents lateral movement or tilting of the spring during compression and reset. It also uses a spring with a smooth coating (such as a nickel-chromium alloy plated spring), significantly reducing frictional resistance on the spring surface during extension and contraction. Furthermore, the spring reset device 4 has a self-lubricating bushing 42 inside. This structure utilizes the bushing's own lubricating properties to further reduce friction and prevent jamming caused by excessive friction during movement. For example, bushings made of polyoxymethylene or other high-molecular polymers can ensure flexible and reliable operation of the device without the need for additional lubrication.

[0035] The limiting ring 5 is primarily responsible for limiting the displacement range of the surge arrester during operation, thereby preventing the spring reset device 4 from exceeding its safe travel or causing collision damage between structural components. The limiting ring 5 is generally installed near the spring reset device 4 and can be fixed to the connecting rod 3 via a snap-fit ​​or locking structure. Technically, the positional stability and accuracy of the limiting ring 5 can be ensured through precision machining of its shape and dimensions and a scientifically designed installation process.

[0036] To address the technical challenge of reducing the probability of jamming, the aforementioned detachable drop-out surge arrester achieves significant results through the following technical means: Firstly, the spring reset device 4 adopts a structure with an anti-deviation guide hole, fundamentally preventing the bending or deviation from the normal movement trajectory that may occur with traditional springs during long-term operation. Secondly, improvements have been made to the spring's material selection and manufacturing process, employing a smooth-coated spring to significantly reduce the coefficient of friction during surface contact. More importantly, a self-lubricating bushing assembly has been introduced to replace the conventional lubrication mechanism, simplifying maintenance procedures and effectively preventing sluggish operation due to insufficient lubrication. Through the combined effect of these measures, the detachable drop-out surge arrester greatly improves its reliability and reduces the potential for functional failure due to jamming.

[0037] like Figure 1 As shown, in one embodiment, the spring reset device 4 of a detachable drop-out surge arrester of this application is mounted on the top of the connecting rod 3 via a fixed base 6, which enhances the overall structural stability. A limiting ring 5 is assembled on the outside of the spring reset device 4 to restrain excessive elongation or compression that may occur during the drop process. Multiple guide protrusions 7 are provided within the anti-deviation guide hole structure 41, which are evenly distributed on the hole wall to reduce the friction area and improve the smoothness of movement. Simultaneously, to optimize self-lubricating performance and ensure structural sealing, the self-lubricating bushing 42 adopts a segmented design and incorporates elastic clips 8. This design allows the bushing to be securely connected and possess high stability after assembly.

[0038] For example, installation can be completed by nesting the fixed base 6 onto the top of the connecting rod 3, followed by inserting a spring device with a limiting function. To ensure the precision of the internal parts' fit, the protrusions in the anti-displacement guide holes are formed using precision machining, and the self-lubricating bushing 42 needs to be locked with elastic clips 8 during segmented assembly to prevent loosening during operation. The relative positions and installation sequence of the entire assembly must strictly adhere to the above description to achieve correct fit.

[0039] like Figure 5As shown, in one embodiment, the spring reset device 4 of a detachable drop-out surge arrester of this application includes a spring with a smooth coating to provide a stable and reliable reset elastic force. To enhance its performance, the spring is also provided with a layer of wear-resistant ceramic material 9. This wear-resistant ceramic material 9 is fixed to the outer surface of the spring through a special coating process and is tightly adhered. Specifically, the wear-resistant ceramic material 9 is evenly distributed on each coil of the spring structure, forming a protective film, thereby further reducing frictional loss during operation. Since the spring is located at the top of the connecting rod 3 and cooperates with the anti-offset guide hole structure 41 and the self-lubricating bushing 42, this design allows the spring to complete the contraction and extension actions more smoothly within its working stroke range.

[0040] For example, the effectiveness of the feature can be ensured through the following steps: first, the spring surface is precisely cleaned; then, liquid ceramic material is coated onto the outside of the spring using specialized equipment, and allowed to fully cure to form the target protective layer. Simultaneously, the consistency of the coating thickness and good compatibility with the plating material should be ensured to prevent peeling or flaking. Surge arrester components constructed in this way exhibit higher reliability and can operate stably for extended periods.

[0041] like Figure 6 As shown, in one embodiment, a limiting ring 5 of a detachable drop-out surge arrester of this application is disposed at the top of the connecting rod 3 and tightly cooperates with the spring reset device 4. The limiting ring 5 is provided with multiple flexible sealing strips 10 to prevent impurities from the external environment from entering the interior of the limiting ring 5 and the working area of ​​the spring reset device 4. This design ensures that the spring reset device 4 can maintain ideal performance in a clean environment and avoids functional degradation due to contaminant accumulation after long-term operation.

[0042] Specifically, the flexible sealing strip 10 is installed on the inner wall of the limiting ring 5 and is distributed along the circumference of the limiting ring 5 to form a multi-layered protective structure. The flexible sealing strip 10 is made of a highly weather-resistant elastic material, such as silicone or fluororubber, and has good resilience and anti-aging properties. Each sealing strip has a certain interval between it and is firmly connected to the limiting ring 5 as a whole to prevent it from falling off due to external force. The limiting ring 5 itself is fixed to the top of the connecting rod 3 by precision press fitting and applies an appropriate preload to the spring return device 4 to achieve a stable assembly state.

[0043] For example, the flexible sealing strip 10 can be embedded into the special groove in the limiting ring 5 to ensure the sealing strip's firmness and flatness. Then, the assembled limiting ring 5 can be fitted onto the top of the connecting rod 3 with the spring reset device 4 installed, and the final position adjustment and locking operation can be performed to ensure that the fit between the components is reasonable and meets the actual use requirements.

[0044] like Figure 1 As shown, in one embodiment, a buffer ring 11 is added between the base 2 and the connecting rod 3 of a detachable drop-out surge arrester according to this application. The buffer ring 11 is located at the connection between the base 2 and the connecting rod 3, and can provide a certain degree of isolation for the mechanical transmission between the two, preventing spring instability caused by external vibration or impact. Furthermore, the material properties of the buffer ring 11 determine that it can maintain structural strength while also possessing a certain degree of elastic deformation capability, a characteristic that allows it to adapt to different operating conditions.

[0045] For example, in one specific implementation, the buffer ring 11 can be installed between the base 2 and the connecting rod 3 by bonding, nesting, or other fixing methods. It also features multiple annular grooves inside to further optimize stress distribution and vibration absorption performance. The main structure of the buffer ring 11 is made of a high-polymer elastic material, with an outer layer of metal or composite reinforcing material to extend its service life. This installation method and structural design ensure that the entire surge arrester maintains a stable and reliable spring return function even when subjected to vibration. Specifically, the buffer ring 11 can be further fixed using pre-designed positioning pin holes or snap-fit ​​mechanisms, thereby improving installation accuracy and ensuring robustness during long-term use.

[0046] like Figure 2 As shown, in one embodiment, the spring reset device 4 of a detachable drop-out surge arrester of this application internally includes an anti-offset guide hole structure 41 and a centering guide groove 12. The centering guide groove 12 is integrated inside the anti-offset guide hole structure 41 and is used to guide and fix the position of the spring assembly. This design avoids lateral displacement of the spring during the stress process through mechanical constraint, thereby ensuring the smooth operation of the spring. Specifically, the centering guide groove 12 has a geometry that matches the outer contour of the spring, which can accurately define the movement path of the spring. In addition, the design of the centering guide groove 12 further improves the structural reliability of the entire spring reset device 4 and ensures stability during long-term use.

[0047] For example, the centering guide groove 12 can be embedded or integrally formed at an appropriate position on the inner wall of the anti-deviation guide hole structure 41. For example, the cross-section of the centering guide groove 12 can be designed as trapezoidal or arc-shaped, forming a point contact or line contact relationship with the outside of the spring. At the same time, for ease of installation, the anti-deviation guide hole structure 41 can be connected to the relevant area at the top of the connecting rod 3 by interference fit or snap-fit. This connection method can ensure stable fixation and simplify the assembly process.

[0048] like Figure 4As shown, in one embodiment, a supporting rib 13 is added to the outer side of the self-lubricating bushing 42 of a detachable drop-out surge arrester of this application to prevent structural deformation under high loads, thereby affecting performance. The supporting rib 13 is connected to the outer wall of the self-lubricating bushing 42 in a specific manner, resulting in enhanced overall stability. Since the surge arrester needs to withstand significant mechanical stress and environmental loads during operation, adding the supporting rib 13 helps maintain the overall structural dimensional stability, especially suitable for situations involving frequent dynamic loads. Simultaneously, to ensure the supporting rib 13 effectively functions, it is necessary to maintain a proper fit between the supporting rib 13 and external components during installation to prevent uneven stress distribution.

[0049] Furthermore, this design optimizes the overall operation of the spring reset device 4. When the surge arrester experiences overvoltage surges causing frequent movement of moving parts, the support rib 13 provides additional stiffness compensation, enabling the self-lubricating bushing 42 to maintain its original shape and functional integrity under complex operating conditions. Specifically, by placing a ring-shaped or segmented support rib 13 at appropriate locations on the outside of the self-lubricating bushing 42, the desired effect can be achieved without hindering the normal operation of other components.

[0050] For example, high-strength materials can be used to make the support ribs 13, and they can be installed onto the outer peripheral surface of the self-lubricating bushing 42 using mechanical pressing, bonding, or nesting methods to achieve a tight fit and stable fixation. It is also important to note that the design of all connection types should meet the prerequisites of weather resistance and long-term use to conform to the requirements of actual application scenarios.

[0051] like Figure 5 As shown, in one embodiment, the spring reset device 4 of a step-removable drop-out surge arrester of this application includes a spring with a smooth coating. The spring's function in the surge arrester structure is to provide elastic restoring force. To ensure the stability of the spring's operation, the spring is constrained by limiting end caps 14 disposed at both ends. This structure tightly installs the limiting end caps 14 at both ends of the spring, thereby defining its reset stroke range. This constraint effectively prevents the spring from being overstretched or compressed and deviating from its normal operating range, while also significantly reducing the risk of the spring jamming during operation.

[0052] Specifically, the design of the limiting end cap 14 needs to be tightly integrated with the top part of the connecting rod 3. For example, it can be achieved through threaded connection, plug-in connection or other reliable fixing methods to effectively manage the spring stroke. The spring with a smooth coating and the self-lubricating bushing 42 work together to further enhance the overall structure's anti-displacement performance and ensure that the spring's reciprocating motion is always smooth and stable.

[0053] For example, metal end caps made of high-precision molds can be selected and assembled to both ends of the spring by spot welding, bonding or other fixing methods. At the same time, the upper limiting end cap 14 is fixed near the lightning arrester 1, and the lower limiting end cap 14 is installed on the top of the connecting rod 3, thereby finally completing the installation and deployment of the entire system.

[0054] like Figure 2 As shown, in one embodiment, the upper part of the connecting rod 3 of the detachable drop-out surge arrester of this application is provided with several heat dissipation grooves 15. The selection of this position fully considers the balance between the possibility of heat accumulation and structural strength. The arrangement of these heat dissipation grooves 15 can ensure that the heat generated during equipment operation is effectively dispersed, thereby reducing the component temperature and avoiding performance degradation or material aging caused by high temperature environment. In addition, a pre-tightening adjustment ring 16 is added to the top of the spring reset device 4. Its function is to flexibly set the initial stress of the spring by adjusting the installation position, which solves the failure risk that may be caused by the traditional fixed pre-tightening structure. This design can better adapt to the requirements of spring force under different working conditions.

[0055] For example, evenly distributed heat dissipation grooves 15 are precisely cut into the top of the connecting rod 3 to form a highly efficient heat exchange channel. The preload adjustment ring 16 is installed on the top of the spring return device 4 through a threaded connection, and its relative height is adjusted by rotation to complete the fine adjustment of the initial preload of the spring. The close cooperation between the various components ensures that the overall structure is stable, reliable and has good functionality.

[0056] In actual operation, when this device is in use, the surge arrester 1 is installed on the base 2 via a threaded connection to achieve a detachable fixing function, thus facilitating maintenance or component replacement. When an overvoltage occurs, the current is guided through the surge arrester 1 and released to the ground, protecting the line from lightning damage. During this process, the connecting rod 3 provides overall support and stably transmits the force to the base 2. Subsequently, the spring reset device 4 provides elastic force, allowing the surge arrester 1 to return to its original state after the external force disappears. At the same time, the anti-displacement guide hole structure 41 prevents the spring from shifting laterally, the smooth-coated spring reduces frictional resistance, and the self-lubricating bushing 42 ensures smooth operation of the device, thereby preventing jamming and improving the overall reliability of operation.

[0057] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A detachable drop-out surge arrester, characterized in that, include: The components include a surge arrester (1), a base (2), a connecting rod (3), a spring reset device (4), and a limiting ring (5). The lightning arrester (1) and the base (2) are connected by threads; The connecting rod (3) is fixed on the base (2); The spring reset device (4) is located on the top of the connecting rod (3). The spring reset device (4) includes an anti-offset guide hole structure (41). The anti-offset guide hole structure (41) is provided with multiple sets of guide protrusions (7). The multiple sets of guide protrusions (7) are evenly distributed on the inner wall of the anti-offset guide hole structure (41). The spring reset device (4) includes a spring with a smooth coating; The spring reset device (4) includes a self-lubricating bushing (42) to avoid jamming. The self-lubricating bushing (42) has a segmented structure and is provided with an elastic buckle (8). The limiting ring (5) is installed outside the spring reset device (4) to limit the drop stroke.

2. A detachable drop-out surge arrester according to claim 1, characterized in that: The spring reset device (4) also includes a fixed base (6), which is installed on the top of the connecting rod (3).

3. A detachable drop-out surge arrester according to claim 1, characterized in that: The limiting ring (5) is provided with multiple flexible sealing strips (10) inside to prevent external impurities from entering.

4. A detachable drop-out surge arrester according to claim 1, characterized in that: A buffer ring (11) is provided between the base (2) and the connecting rod (3).

5. A detachable drop-out surge arrester according to claim 1, characterized in that: The anti-offset guide hole structure (41) is provided with a centering guide groove (12) so that the spring will not be laterally offset during operation.

6. A detachable drop-out surge arrester according to claim 1, characterized in that: The self-lubricating bushing (42) is provided with a support rib (13) on the outside.

7. A detachable drop-out surge arrester according to claim 1, characterized in that: The spring with a smooth coating is equipped with limit end caps (14) at both the upper and lower ends to constrain the reset stroke range and reduce the probability of jamming.

8. A detachable drop-out surge arrester according to claim 1, characterized in that: The upper part of the connecting rod (3) has multiple sets of heat dissipation grooves (15).

9. A detachable drop-out surge arrester according to claim 1, characterized in that: The spring reset device (4) is equipped with a pre-tightening adjustment ring (16) on top, which is used to adjust the initial stress of the spring.

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