Anti-vibration and anti-collision device for strain insulator string based on multi-degree-of-freedom adjustment

Abstract

This invention discloses a vibration and collision prevention device for tension insulator strings based on multi-degree-of-freedom adjustment. The device is installed between adjacent insulator strings and includes two sets of fixed bases, two sets of hinge assemblies, a buffer assembly, and two sets of limiting assemblies. The fixed bases are symmetrically fixed to the outer walls of adjacent tension insulator strings. The hinge assemblies are fixed to the opposing sides of the two fixed bases and consist of a series-arranged universal ball joint and a rotary hinge joint. The axial ends of the buffer assembly are respectively hinged to the two sets of hinge assemblies. The buffer assembly includes a stroke adjustment unit and a damping unit. The limiting assemblies are located at the axial ends of the buffer assembly, and their limiting stroke matches the extension stroke of the stroke adjustment unit. This device constructs a multi-degree-of-freedom hinge system through the hinge assemblies, preventing additional bending moments from occurring in the insulator strings under vibration conditions. Simultaneously, the buffer assemblies integrate spacing adjustment and damping vibration reduction functions, compressing the device volume, shortening the vibration transmission path, and effectively blocking vibration transmission.

Description

Technical Field

[0001] This invention relates to the field of power fittings technology for transmission lines, and in particular to a vibration and collision prevention device for tension insulator strings based on multi-degree-of-freedom adjustment. Background Technology

[0002] In the field of ultra-high voltage power transmission, in order to address the problems of relative displacement, collision and vibration transmission between tension insulator strings that are prone to occur under complex working conditions such as wind-induced vibration, ice-covered galloping and ice-shedding jumping, the industry generally adopts the technical means of configuring inter-string protective hardware between adjacent insulator strings to ensure the safe operation of the line.

[0003] The existing protection system mainly includes the following technical solutions: one is to use anti-vibration hammer devices, which convert vibration energy into heat energy and dissipate it through the inertial coupling between the hammer and the steel strand. It is a basic anti-vibration means for conductors and insulator strings and is widely used in transmission lines of various voltage levels; another is to use spacer bar structures, which are mainly used to maintain the spacing between split conductors and suppress whipping. Some anti-galling spacer bars can also achieve a certain amplitude of galloping control through elastic elements.

[0004] However, existing UHV series tension insulator protection technology still has several inherent limitations, specifically:

[0005] 1. The degree of freedom design of the hinge structure is relatively simple, mostly adopting single or double degree of freedom hinge form. It cannot effectively adapt to the multi-directional spatial deformation of the insulator string under working conditions such as wind-induced vibration and ice-covered galloping. It is easy to generate additional bending moment at the connection between the device and the insulator string, which can lead to problems such as structural jamming and component fatigue damage.

[0006] 2. The stroke adjustment and damping vibration reduction functions are mostly designed separately. The stroke adjustment structure and damping components are arranged independently, which not only increases the overall size of the device and occupies the limited electrical insulation space of the UHV line, but also leads to a longer vibration transmission path, a significant reduction in damping vibration reduction efficiency, and poor overall collaborative protection effect, making it difficult to meet the high reliability operation requirements of UHV lines. Summary of the Invention

[0007] To overcome the above problems, the purpose of this invention is to provide a vibration and collision prevention device for tension insulator strings based on multi-degree-of-freedom adjustment, thereby solving the technical problem of poor vibration and collision protection between existing tension insulator strings in related technologies.

[0008] The technical solution adopted in this invention is:

[0009] The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment is installed between adjacent insulator strings. It is characterized by including two sets of fixed bases, two sets of hinge assemblies, buffer components, and two sets of limiting components symmetrically arranged on adjacent insulator strings.

[0010] The two sets of fixed bases are symmetrically fixed to the outer wall of the insulator cap of adjacent tension insulator strings.

[0011] The two sets of hinge assemblies are fixed to the opposite sides of the two fixed bases. The hinge assembly consists of a series-arranged universal ball joint and a rotary hinge joint, including a ball joint support, a ball head, a hinge connecting seat, and a hinge pin. The ball joint support is welded to the corresponding fixed base. The ball joint support has a ball joint cavity. The ball head slides into the ball joint cavity to form the universal ball joint. One end of the hinge connecting seat is integrally formed with the protruding end of the ball head, and the other end has a hinge hole. The hinge pin passes through the hinge hole and the corresponding end of the buffer assembly to form the rotary hinge joint.

[0012] The buffer assembly is hinged to the two sets of hinge assemblies at both axial ends. The buffer assembly includes a stroke adjustment unit and a damping unit, with the damping unit embedded in the stroke adjustment unit.

[0013] The two sets of limiting components are disposed at both ends of the buffer component along the axial direction, and the limiting stroke of the limiting components matches the extension stroke of the stroke adjustment unit.

[0014] As a further description of the present invention, the fixed base includes a clamp body and fasteners; the inner arc surface of the clamp body is adapted to the outer peripheral surface of the insulator steel cap, the two ends of the clamp body are integrally formed with connecting ears, the fasteners are inserted through the connecting ears, and the inner arc surface of the clamp body is fitted with an anti-slip pad layer.

[0015] As a further description of the present invention, the stroke adjustment unit includes an adjustment sleeve, a first lead screw, and a second lead screw; the inner cavity of the adjustment sleeve has internal threaded holes with opposite directions of rotation at both ends, and the first lead screw and the second lead screw are respectively screwed into the internal threaded holes at both ends of the adjustment sleeve; the outer end of the first lead screw is connected to a rotating hinge joint on one side, and the outer end of the second lead screw is connected to a rotating hinge joint on the other side; the two ends of the adjustment sleeve are respectively provided with locking members, and the locking members cooperate with the corresponding lead screws to lock the axial position of the lead screws.

[0016] The damping unit includes a damping piston and a damping body.

[0017] As a further description of the present invention, the locking member includes two locking nuts, which are respectively screwed onto the outer walls of the first lead screw and the second lead screw, and the end face of the locking nut can abut and lock with the corresponding end face of the adjusting sleeve.

[0018] As a further description of the present invention, a damping cavity is provided in the middle of the inner cavity of the adjusting sleeve. The damping cavity is coaxially connected with the internal threaded holes at both ends to form the inner cavity of the stroke adjusting unit. Limiting end caps are fixed at both axial ends of the damping cavity. The damping piston is slidably disposed in the damping cavity. The damping body fills the damping cavity space between the damping piston and the limiting end caps on both sides. The inner ends of the first lead screw and the second lead screw respectively pass through the limiting end caps on the corresponding sides and extend into the damping cavity. The inner ends of the first lead screw and the second lead screw are both fixedly connected to the damping piston.

[0019] As a further description of the present invention, the outer peripheral wall of the damping piston is provided with an annular groove, and a guide ring is embedded in the annular groove, the outer wall of the guide ring being in contact with the inner wall of the damping cavity.

[0020] As a further description of the present invention, the limiting component includes two sets of buffer blocks and two sets of limiting platforms; the two sets of buffer blocks are respectively sleeved on the outer walls of the first lead screw and the second lead screw, and one end face of the buffer block is in contact with the corresponding end face of the adjusting sleeve; the two sets of limiting platforms are respectively disposed on the outer walls of the first lead screw and the second lead screw.

[0021] As a further description of the present invention, a sealing element is fitted at the opening of the ball joint cavity, and the inner ring of the sealing element is fitted and sealed to the outer wall of the protruding end of the ball head.

[0022] As a further description of the present invention, the spherical surface of the ball head is coated with a wear-resistant layer.

[0023] As a further description of the present invention, the rotatable range of the universal ball joint is ±30° pitch and yaw, and ±360° circumferential torsion, and the rotatable angle range of the rotating hinge joint is ±25°.

[0024] The beneficial effects of this invention are:

[0025] This invention relates to a multi-degree-of-freedom adjustable vibration and collision prevention device for tension insulator strings. The device constructs a multi-degree-of-freedom articulated system through a series-arranged universal ball joint and rotary hinge joint. This system can comprehensively adapt to omnidirectional spatial deformations of insulator strings under conditions such as wind-induced vibration, ice-covered galloping, and ice-removal jumping, including pitching, yaw, circumferential torsion, and misalignment between strings. It fundamentally avoids additional bending moments caused by string deformation. Simultaneously, it employs an integrated design where the damping unit is embedded within the stroke adjustment unit, deeply integrating spacing adjustment and damping vibration reduction functions. This significantly reduces the overall size of the device, avoiding the occupation of valuable electrical insulation space in ultra-high voltage lines, and significantly shortens the vibration transmission path. Inter-string vibration can directly drive the damping unit to consume energy, greatly improving vibration reduction efficiency and effectively blocking vibration transmission between adjacent insulator strings, reducing the risk of hardware fatigue and insulator damage.

[0026] This invention is based on a multi-degree-of-freedom adjustable anti-vibration and anti-collision device for tension insulator strings. By precisely matching the limiting stroke of the limiting component with the extension stroke of the stroke adjustment unit, the adjustment function and the protection function are synergistically adapted. This ensures the full stroke adjustment capability under installation conditions and limits the maximum relative displacement between strings under extreme dynamic loads, thereby reducing the risk of collision between adjacent insulator strings.

[0027] This invention relates to a vibration and collision prevention device for tension insulator strings based on multi-degree-of-freedom adjustment. This highly integrated device coordinates five core functions: fixed connection between tension insulator strings, multi-degree-of-freedom adaptation, spacing adjustment, damping vibration reduction, and limit switching. It integrates multiple functions into one unit, eliminating the need for separate installations of multiple sets of devices. This significantly improves the device's adaptability to operating conditions and operational reliability, and can fully meet the vibration and collision prevention requirements of UHV multi-tension insulator strings under complex operating conditions. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment proposed in this invention.

[0029] Figure 2 This is a schematic diagram of the installation of the anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment proposed in this invention.

[0030] Figure 3 This is an enlarged schematic diagram of a portion of the anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment proposed in this invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Fixed base.

[0033] 11. Hoop body; 12. Fastener; 13. Connecting ear; 14. Anti-slip pad layer.

[0034] 2. Hinge assembly.

[0035] 21. Universal ball joint; 22. Rotary hinge joint; 211. Ball joint support; 2111. Ball joint cavity; 2112. Seal; 212. Ball head; 221. Hinge connection seat; 222. Hinge pin.

[0036] 3. Buffer components.

[0037] 31. Stroke adjustment unit; 311. Adjustment sleeve; 3111. Damping cavity; 312. First lead screw; 313. Second lead screw; 314. Locking element; 32. Damping unit; 321. Damping piston; 3211. Guide ring; 322. Damping body; 323. Limiting end cap.

[0038] 4. Limiting components.

[0039] 41. Buffer stop; 42. Limiting platform.

[0040] 5. Insulator string; 51. Insulator steel cap. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0043] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0044] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0045] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Existing vibration and collision prevention devices for UHV tension insulator strings have a single degree of freedom in their hinged structure, which cannot adapt to the multi-directional spatial deformation of insulator strings under conditions such as wind-induced vibration and icing galloping. This can easily generate additional bending moments, leading to structural jamming and component fatigue fracture. The stroke adjustment and damping vibration reduction functions are mostly arranged separately, resulting in a large overall device size, occupying the electrical insulation space of the line, and having a long vibration transmission path and low vibration reduction efficiency. The limit components and stroke adjustment units lack coordinated design, which can easily lead to limit failure causing insulator string collisions or excessive limit interference with normal adjustment functions. These devices cannot meet the high reliability protection requirements of ±1100kV UHV multi-connection tension insulator strings.

[0048] like Figures 1-3 As shown, it illustrates a specific embodiment of the present invention:

[0049] Example 1:

[0050] The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment is installed between adjacent insulator strings 5. It includes two sets of fixed bases 1, two sets of hinge assemblies 2, buffer components 3 and two sets of limiting components 4 symmetrically arranged on adjacent insulator strings 5.

[0051] The two sets of fixed bases 1 are symmetrically fixed on the outer wall of the insulator steel cap 51 of the adjacent tension insulator strings 5.

[0052] In this embodiment, the fixed base 1 serves as the supporting foundation for the connection between the device and the tension insulator string 5. It can be made of Q355B low alloy high strength steel, forged and machined to meet the strength design requirements of UHV transmission line fittings. It is symmetrically fixed to the outer wall of the insulator steel cap 51 of the two adjacent tension insulator strings 5 ​​to achieve a reliable connection between the vibration and collision prevention device and the insulator string 2.

[0053] Two sets of the hinge assemblies 2 are fixed to the opposite sides of the two fixed bases 1. The hinge assembly 2 is composed of a universal ball joint 21 and a rotary hinge joint 22 arranged in series, including a ball joint support 211, a ball head 212, a hinge connecting seat 221 and a hinge pin 222. The ball joint support 211 is welded to the fixed base 1 on the corresponding side. The ball joint support 211 has a ball joint cavity 2111. The ball head 212 slides with the ball joint cavity 2111 to form the universal ball joint 21. One end of the hinge connecting seat 221 is integrally formed with the protruding end of the ball head 212, and the other end has a hinge hole. The hinge pin 222 passes through the hinge hole and the corresponding end of the buffer assembly 3 to form the rotary hinge joint 22.

[0054] In this embodiment, the hinge assembly 2 is the core component of the device, capable of handling deformations caused by wind-induced vibrations and icing galloping between insulator strings 5 ​​in actual lines. The universal ball joint 21 and the rotary hinge joint 22 are arranged in series along the axial direction of the device, and their rotational degrees of freedom are decoupled from each other, forming a rotational system covering multiple directions. The series universal ball joint 21 and the rotary hinge joint 22 achieve full coverage of multi-directional degrees of freedom, which can fully adapt to the omnidirectional spatial deformation of the insulator string 5 under complex working conditions, fundamentally avoiding the generation of additional bending moments and eliminating the risk of device jamming and component fatigue fracture. The integrally formed ball head 212 and hinge connection seat 221 significantly improve the overall structural rigidity of the hinge assembly 2, avoiding the risk of fitting gaps and connection failures caused by splicing multiple components. The high-precision fit between the ball joint cavity 2111 and the ball head 212 ensures the smoothness of rotation and load-bearing stability, improving the operational reliability and service life of the hinge assembly 5.

[0055] Specifically, the rotatable range of the universal ball joint 21 is ±30° pitch and yaw and ±360° circumferential torsion, and the rotatable angle range of the rotating hinge joint 22 is ±25°.

[0056] In this embodiment, the rotation range and angle of the universal ball joint 21 and the rotating hinge joint 22 make the spatial range that the device can achieve in actual use a "spherical cone with a deflection", that is, any direction within a solid angle of 55°, and the end of each direction can also rotate around its own axis. In this way, when the adjacent insulator string 5 encounters multi-directional spatial deformation under conditions such as wind-induced vibration and ice-covered dancing, it has a buffer space. Through the use of the hinge assembly 2, the buffer component 3, and the limiting component 4, the energy generated during the vibration is converted, avoiding the multi-directional spatial deformation caused by traditional anti-vibration and anti-collision devices.

[0057] The buffer assembly 3 is hinged to the two sets of hinge assemblies 2 at both axial ends. The buffer assembly 3 includes a stroke adjustment unit 31 and a damping unit 32, with the damping unit 32 embedded in the stroke adjustment unit 31.

[0058] In this embodiment, the buffer component 3 serves as the core of the device spacing adjustment and vibration suppression. The adjustment body is made of 40Cr alloy structural steel and is formed by quenching and tempering. The stroke adjustment unit 31 provides the device with axial spacing adjustment capability. The damping unit 32 is completely embedded in the inner cavity of the stroke adjustment unit 31, with no exposed structure, and does not occupy additional line insulation space.

[0059] The two sets of limiting components 4 are disposed at both ends of the buffer component 3 along the axial direction, and the limiting stroke of the limiting component 4 matches the extension stroke of the stroke adjustment unit 31.

[0060] In this embodiment, the limiting component 4 is formed by combining elastic buffer material and high-strength steel, and is set on the outside of the lead screw at both ends of the buffer component 3. The limiting stroke is set to 100mm according to the maximum extension stroke of the stroke adjustment unit 31, which is completely matched with the extension stroke of the stroke adjustment unit 31, without interference or risk of limiting failure. Optionally, the limiting stroke can be set according to the actual situation on site, which is not limited here.

[0061] In summary, in this embodiment, the fixed base 1 stably fixes the entire device to two adjacent tension insulator strings 5, providing a stable bearing foundation for the entire device; the hinge assembly 2 achieves free rotation in multiple directions through the series universal ball joint 21 and rotating hinge joint 22, adapting to the omnidirectional spatial deformation of the insulator strings 5 ​​under conditions such as wind-induced vibration, ice-covered dancing, and ice-removing jumping, thus fundamentally preventing the device from generating additional bending moments due to string deformation; the stroke adjustment unit 31 of the buffer assembly 3 can flexibly adjust the total axial length of the device to adapt to different installation requirements and installation error compensation for different joint spacings; the damping unit 32 deforms synchronously with the relative vibration of the insulator strings 5, dissipating vibration energy and blocking the vibration transmission between adjacent insulator strings 5; the limiting assembly 4 is triggered when the buffer assembly 3 extends to its limit position, precisely limiting the maximum displacement according to the extension stroke of the stroke adjustment unit 31, avoiding rigid collisions between adjacent insulator strings 5. The components of the entire device work together to achieve integrated protection with fixed connection, multi-degree-of-freedom adaptation, spacing adjustment, damping and vibration reduction, and limit switch.

[0062] Example 2:

[0063] Specifically, the fixed base 1 includes a clamp body 11 and a fastener 12; the inner arc surface of the clamp body 11 is adapted to the outer peripheral surface of the insulator steel cap 51, the two ends of the clamp body 11 are integrally formed with connecting ears 13, the fastener 12 passes through the connecting ears 13, and the inner arc surface of the clamp body 11 is fitted with an anti-slip pad layer 14.

[0064] In this embodiment, the clamp body 11 is divided into two symmetrical half-clamp structures. The curvature of the inner arc surface of the clamp body 11 is consistent with the curvature of the outer circumferential surface of the tension insulator cap 51, ensuring that it forms a surface contact fit with the insulator cap 51 after installation. The connecting lug 13 and the end of the clamp body 11 are integrally forged. The anti-slip pad 14 is integrally vulcanized from nitrile rubber with a thickness of 2mm-3mm. It is fixed to the inner arc surface of the clamp body 11 by structural adhesive. The inner wall of the anti-slip pad 14 is integrally formed with an array of triangular anti-slip teeth, with a tooth height of 0.5mm-1mm and a tooth spacing of 2mm. During installation, the clamp bodies 11 of the two half-clamps are fastened to the outer wall of the insulator cap 51. The bolts of the fasteners 12 are inserted into the coaxial bolt holes of the connecting lugs 13. The double nuts are tightened in sequence. Finally, the closed pin is inserted into the pin hole at the end of the bolt. The closed pin is pried open and locked to the outside of the double nuts to complete the fixed installation.

[0065] In this embodiment, the clamp body 11 achieves close surface contact with the insulator steel cap 51 through its inner arc surface adapted to the insulator steel cap 51, ensuring the stability of the fixation and the uniformity of contact stress, and avoiding stress concentration damage to the insulator; the connecting ear 13 provides a stable installation and bearing base for the fastener 12, and the clamp body 11 of the two halves is firmly fixed to the insulator steel cap 51 by the locking force of the fastener 12; the anti-slip pad layer 14 fills the tiny gap between the clamp body 11 and the steel cap, increases the static friction of the contact surface, and avoids direct hard contact between the metal clamp and the steel cap, achieving non-destructive installation; at the same time, the combination of the double nut and the closed pin of the fastener 12 forms a multi-layer anti-loosening structure to prevent the bolt from loosening under long-term alternating vibration.

[0066] Example 3:

[0067] Specifically, the stroke adjustment unit 31 includes an adjustment sleeve 311, a first lead screw 312, and a second lead screw 313. The inner cavity of the adjustment sleeve 311 has internally threaded holes with opposite rotation directions at both ends. The first lead screw 312 and the second lead screw 313 are respectively screwed into the internally threaded holes at both ends of the adjustment sleeve 311. The outer end of the first lead screw 312 is connected to a rotating hinge pair 22 on one side, and the outer end of the second lead screw 313 is connected to a rotating hinge pair 22 on the other side. Locking members 314 are respectively provided at both ends of the adjustment sleeve 311, and the locking members 314 cooperate with the corresponding lead screws to lock the axial position of the lead screws.

[0068] The damping unit 32 includes a damping piston 321 and a damping body 322.

[0069] In this embodiment, the adjusting sleeve 311 is a cylindrical sleeve structure. The two ends of its inner cavity are respectively opened with left-hand internal thread holes and right-hand internal thread holes, forming two sets of internal threads with opposite directions of rotation. The thread specification is Tr40×7 trapezoidal thread, and the thread accuracy is 6H grade. The advantage of using trapezoidal thread is that it has high transmission efficiency, strong load-bearing capacity, and good self-locking performance, which is suitable for the heavy-load adjustment requirements of UHV power fittings. In practical applications, other thread specifications can also be selected, but this embodiment does not limit this. The external thread of the first lead screw 312 is a right-hand trapezoidal thread, and the external thread of the second lead screw 313 is a left-hand trapezoidal thread. The thread specifications are all adapted to the internal thread holes at both ends of the adjusting sleeve 311.

[0070] In this embodiment, the adjusting sleeve 311 significantly improves the efficiency of pitch adjustment through the synchronous adjustment structure of the positive and negative threaded screws. Bidirectional synchronous adjustment can be completed simply by rotating the adjusting sleeve 311, simplifying the operation process of high-altitude installation, reducing the difficulty of operation, and improving the efficiency of operation. The transmission structure of the trapezoidal thread has strong load-bearing capacity and smooth transmission, ensuring the stability of the adjustment process and the load-bearing strength of the device. The matching locking part 314 can reliably lock the position of the screw after adjustment, avoiding the problem of screw loosening and movement under long-term alternating vibration, ensuring the long-term stability of the pitch during the operation of the device, and ensuring the continuous effectiveness of the function.

[0071] Specifically, the locking member 314 includes two locking nuts, which are respectively screwed onto the outer walls of the first lead screw 312 and the second lead screw 313, and the end face of the locking nut can abut against the corresponding end face of the adjusting sleeve 311 to lock it.

[0072] In this embodiment, the locking nut and the lead screw are threaded together, allowing for flexible movement along the lead screw's axial direction. When the end face of the locking nut is tightly abutted against the end face of the adjusting sleeve 311, the friction of the threaded pair and the abutting force of the end face restrict the circumferential rotation of the lead screw relative to the adjusting sleeve 311, thereby locking the axial position of the lead screw and preventing the lead screw from loosening circumferentially or moving axially under alternating vibration loads. When it is necessary to readjust the device spacing, simply loosen the locking nut in the direction away from the adjusting sleeve 311 to release the locking state, and then rotate the adjusting sleeve 311 again to adjust the spacing.

[0073] In this embodiment, the locking nut has a simple structure, low manufacturing cost, and convenient locking and loosening operations that can be completed without special tools, making it fully suitable for the operational needs of high-altitude operations on UHV lines. The end-face abutment locking method ensures uniform locking force distribution and high locking reliability, effectively suppressing loosening of the lead screw under alternating loads and guaranteeing the long-term stability of the device's axial length. The threaded locking structure can flexibly adapt to locking requirements under different adjustment strokes, facilitating secondary adjustments during later maintenance, and balancing locking stability with operational flexibility.

[0074] Specifically, a damping cavity 3111 is provided in the middle of the inner cavity of the adjusting sleeve 311. The damping cavity 3111 is coaxially connected with the internal threaded holes at both ends to form the inner cavity of the stroke adjusting unit 31. Limiting end caps 323 are fixed at both axial ends of the damping cavity 3111. The damping piston 321 is slidably disposed in the damping cavity 3111. The damping body 322 fills the space of the damping cavity 3111 between the damping piston 321 and the limiting end caps 323 on both sides. The inner ends of the first lead screw 312 and the second lead screw 313 respectively pass through the limiting end caps 323 on the corresponding sides and extend into the damping cavity 3111. The inner ends of the first lead screw 312 and the second lead screw 313 are both fixedly connected to the damping piston 321.

[0075] In this embodiment, the damping cavity 3111 is coaxially located in the middle of the inner cavity of the adjusting sleeve 311. It is a cylindrical cavity, and its two ends are coaxially connected to the internal threaded holes at both ends of the adjusting sleeve 311, with a transition step provided at the connection point. Two sets of limiting end caps 323 are respectively provided at the axial ends of the damping cavity 3111. The outer circumferential surface of the limiting end cap 3111 is provided with external threads, and the inner walls at both ends of the damping cavity 3111 are provided with matching internal threads. The limiting end caps 3111 are fixed to the ends of the damping cavity 3111 by threaded connection. The damping body 322 is divided into two... The components are respectively filled in the damping cavity 3111 space between the damping piston 321 and the two side limiting end caps 323, without gaps; the inner ends of the first lead screw 312 and the second lead screw 313 are both machined with external thread sections, which pass through the central through holes of the corresponding side limiting end caps 323 and are screwed and fixed in the threaded connection holes at both ends of the damping piston 321. The connection parts between the inner ends of the lead screws and the damping piston 321 are coated with thread locking adhesive to ensure connection strength and anti-loosening performance; in this embodiment, the damping body 322 is made of high damping polyurethane material with a Shore hardness of 60±5 Shore A and a loss factor ≥0.8, which has excellent vibration energy dissipation ability and outdoor weather resistance. The advantage of choosing this material is that the damping performance is stable, aging-resistant, and impact-resistant, which is suitable for the long-term outdoor operation requirements of transmission lines. In practical applications, other damping materials such as high damping rubber can also be selected for this component, but this application embodiment does not limit this.

[0076] Understandably, when adjacent insulator strings 5 ​​experience relative vibration displacement, the first lead screw 312 and the second lead screw 313 will move axially with the deformation of the insulator string 5, causing the damping piston 321 to slide axially back and forth within the damping cavity 3111. As the damping piston 321 slides, it compresses the damping bodies 322 on both sides, causing the damping bodies 322 to undergo elasto-plastic deformation, converting the mechanical energy of the vibration into heat energy for dissipation. This achieves the absorption and dissipation of vibration energy, blocking the vibration transmission between adjacent insulator strings 5. This achieves deep integration of the damping unit 32 for vibration reduction and the stroke adjustment unit 31, eliminating the need for additional installation space for the damping device and significantly reducing the installation space required. The overall size of the device avoids the impact on the electrical insulation distance of the UHV line and is suitable for compact installation conditions. The direct fixed connection between the lead screw and the damping piston 321 allows the vibration displacement of the insulator string 5 to be directly and losslessly transmitted to the damping piston 321, which greatly shortens the vibration transmission path, eliminates the problem of vibration reduction response lag, significantly improves the vibration energy dissipation efficiency, effectively blocks the vibration transmission between strings, and reduces the risk of hardware fatigue and insulator damage. The coaxial cavity and piston design ensures the smooth sliding of the damping piston 321, and the sealing and limiting design of the limiting end cover 323 ensures the long-term stability and reliability of the damping unit 32.

[0077] Specifically, the outer peripheral wall of the damping piston 321 is provided with an annular groove, and a guide ring 3211 is embedded in the annular groove. The outer wall of the guide ring 3211 is in contact with the inner wall of the damping cavity 3111.

[0078] In this embodiment, the guide ring 3211 is made of polytetrafluoroethylene (PTFE) material with 15% glass fiber and 5% graphite added, which has excellent self-lubricating properties, wear resistance and creep resistance. The annular groove on the outer periphery of the damping piston 321 provides stable installation positioning for the guide ring 3211, preventing the guide ring 3211 from shifting or falling off during piston sliding. The guide ring 3211 fits tightly against the inner wall of the damping cavity 3111, providing stable radial support and axial guidance for the reciprocating sliding of the damping piston 321, ensuring that the piston always slides along the axis of the damping cavity 3111, and avoiding piston wobble and eccentricity problems. The self-lubricating properties of the guide ring 3211 can significantly reduce the coefficient of friction during sliding, reducing friction and wear between the piston and the inner wall of the damping cavity 3111.

[0079] Example 4:

[0080] Specifically, the limiting component 4 includes two sets of buffer blocks 41 and two sets of limiting platforms 42; the two sets of buffer blocks 41 are respectively sleeved on the outer walls of the first lead screw 312 and the second lead screw 313, and one end face of the buffer block 41 is in contact with the corresponding end face of the adjusting sleeve 311; the two sets of limiting platforms 42 are respectively disposed on the outer walls of the first lead screw 312 and the second lead screw 313.

[0081] In this embodiment, the buffer block 41 is integrally molded from polyurethane elastic material, possessing excellent impact resistance and buffer energy absorption capacity. When the insulator string 5 undergoes extreme large displacement deformation, causing the lead screw to extend to the limit stroke of the adjusting sleeve 311, the limiting platform 42 on the outer wall of the lead screw will first contact the outer end face of the buffer block 41. The buffer block 41 will first undergo elastic deformation to absorb impact energy and alleviate impact load. When the displacement continues to increase, the buffer block 41 is compressed to the limit, and the limiting platform 42 forms a rigid abutment with the end face of the adjusting sleeve 311 through the buffer block 41, restricting the further extension of the lead screw and achieving rigid limiting. This strictly limits the relative displacement of adjacent insulator strings 5 ​​within a safe range, avoiding rigid collisions between strings.

[0082] Understandably, this design forms a graded protection structure of flexible buffering and rigid limiting. It absorbs the impact energy under extreme working conditions through the buffer block 41, avoiding secondary impact damage caused by rigid limiting, and precisely limits the maximum stroke through the rigid limiting platform 42, fundamentally eliminating rigid collisions between adjacent insulator strings 5. The buffer block 41 and the limiting platform 42 are directly integrated into the mating part of the lead screw and the adjusting sleeve 311, with a compact structure that requires no additional installation space and does not affect the overall size and electrical insulation performance of the device. The limiting stroke is perfectly matched with the maximum extension stroke of the stroke adjustment unit 31, ensuring full stroke adjustment capability under normal working conditions and achieving precise limiting under extreme working conditions, without interference or failure risk, and greatly improving the protective reliability of the device.

[0083] Example 5:

[0084] Specifically, a sealing element 2112 is fitted at the opening of the ball joint cavity 2111, and the inner ring of the sealing element 2112 is fitted and sealed to the outer wall of the protruding end of the ball head 212.

[0085] In this embodiment, the outer ring of the seal 2112 is interference-fitted with the annular sealing groove, achieving fixation and static sealing between the seal 2112 and the ball joint support 211; the double lips of the inner ring of the seal 2112 are tightly fitted with the outer wall of the ball head 212, wherein the dustproof lip faces outward, which can prevent impurities such as wind, sand, dust, rain and snow in the outdoor environment from entering the ball joint cavity 2111, avoiding wear and jamming of the mating surface caused by impurities; the sealing lip faces inward to the ball joint cavity 2111, which can effectively prevent the grease filled in the cavity from leaking outward, ensuring long-term lubrication inside the ball joint pair and reducing wear on the mating surface.

[0086] Specifically, the spherical surface of the ball head 212 is coated with a wear-resistant layer.

[0087] In this embodiment, the wear-resistant layer is made of WC-Co hard alloy material. After spraying, the thickness of the wear-resistant layer is 0.15mm-0.25mm. This coating has high bonding strength, high hardness, excellent wear resistance and corrosion resistance, which can significantly improve the service performance of the ball head 212 spherical surface. In practical applications, the wear-resistant layer can also be selected from other wear-resistant and anti-corrosion coatings such as chromium-based ceramic composite coating and nickel-based alloy coating. This application embodiment does not limit this.

[0088] Understandably, the wear-resistant layer significantly reduces the friction coefficient of the ball head 212 spherical surface, reduces the wear of the mating surfaces, maintains the mating accuracy of the universal ball joint for a long time, and avoids problems such as increased hinge gap, device shaking and impact, and increased additional bending moment caused by wear of the mating surfaces; it greatly improves the hardness and corrosion resistance of the ball head 212 spherical surface, effectively resists the erosion and wear of harsh outdoor environments, extends the service life of the hinge assembly 2, and ensures the stability and reliability of the device's long-term operation; the fine grinding process after spraying ensures the spherical accuracy of the ball head 212, ensures the smoothness of the universal ball joint rotation, and improves the device's multi-directional deformation adaptability.

[0089] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0090] Many other changes and modifications can be made without departing from the concept and scope of this invention. It should be understood that this invention is not limited to the specific embodiments, and the scope of this invention is defined by the appended claims.

Claims

1. A vibration and collision prevention device for tension insulator strings based on multi-degree-of-freedom adjustment, installed between adjacent insulator strings (5), characterized in that, It includes two sets of fixed bases (1) symmetrically arranged on adjacent insulator strings (5), two sets of hinge assemblies (2), buffer assembly (3) and two sets of limiting assembly (4); The two sets of fixed bases (1) are symmetrically fixed on the outer wall of the insulator steel cap (51) of the adjacent tension insulator string (5); Two sets of the hinge assemblies (2) are fixed to the opposite sides of the two fixed bases (1). The hinge assembly (2) is composed of a universal ball joint (21) and a rotating hinge joint (22) arranged in series, including a ball joint support (211), a ball head (212), a hinge connecting seat (221), and a hinge pin (222). The ball joint support (211) is welded to the fixed base (1) on the corresponding side. The ball joint support (211) has a ball joint cavity (2111). The ball head (212) slides with the ball joint cavity (2111) to form the universal ball joint (21). One end of the hinge connecting seat (221) is integrally formed with the protruding end of the ball head (212), and the other end has a hinge hole. The hinge pin (222) passes through the hinge hole and the corresponding end of the buffer assembly (3) to form the rotating hinge joint (22). The buffer assembly (3) is hinged to the two sets of hinge assemblies (2) at both axial ends. The buffer assembly (3) includes a stroke adjustment unit (31) and a damping unit (32). The damping unit (32) is embedded in the stroke adjustment unit (31). The two sets of limiting components (4) are disposed at both ends of the buffer component (3) in the axial direction, and the limiting stroke of the limiting component (4) matches the extension stroke of the stroke adjustment unit (31).

2. The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment according to claim 1, characterized in that, The fixed base (1) includes a clamp body (11) and a fastener (12); the inner arc surface of the clamp body (11) is adapted to the outer circumferential surface of the insulator steel cap (51); the two ends of the clamp body (11) are integrally formed with connecting ears (13); the fastener (12) passes through the connecting ears (13); and the inner arc surface of the clamp body (11) is fitted with an anti-slip pad layer (14).

3. The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment according to claim 1, characterized in that, The stroke adjustment unit (31) includes an adjustment sleeve (311), a first lead screw (312), and a second lead screw (313). The inner cavity of the adjustment sleeve (311) has internal threaded holes with opposite directions of rotation at both ends. The first lead screw (312) and the second lead screw (313) are respectively screwed into the internal threaded holes at both ends of the adjustment sleeve (311). The outer end of the first lead screw (312) is connected to a rotating hinge pair (22) on one side, and the outer end of the second lead screw (313) is connected to a rotating hinge pair (22) on the other side. Locking members (314) are respectively provided at both ends of the adjustment sleeve (311). The locking members (314) cooperate with the corresponding lead screw to lock the axial position of the lead screw. The damping unit (32) includes a damping piston (321) and a damping body (322).

4. The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment according to claim 3, characterized in that, The locking component (314) includes two locking nuts, which are respectively screwed onto the outer walls of the first lead screw (312) and the second lead screw (313), and the end face of the locking nut can abut against and lock the corresponding end face of the adjusting sleeve (311).

5. The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment according to claim 3, characterized in that, The inner cavity of the adjusting sleeve (311) is provided with a damping cavity (3111). The damping cavity (3111) is coaxially connected with the internal threaded holes at both ends to form the inner cavity of the stroke adjustment unit (31). Limiting end caps (323) are fixed at both axial ends of the damping cavity (3111). The damping piston (321) is slidably disposed in the damping cavity (3111). The damping body (322) fills the space of the damping cavity (3111) between the damping piston (321) and the limiting end caps (323) on both sides. The inner ends of the first lead screw (312) and the second lead screw (313) respectively pass through the limiting end caps (323) on the corresponding sides and extend into the damping cavity (3111). The inner ends of the first lead screw (312) and the second lead screw (313) are both fixedly connected to the damping piston (321).

6. The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment according to claim 5, characterized in that, The outer peripheral wall of the damping piston (321) is provided with an annular groove, and a guide ring (3211) is embedded in the annular groove. The outer wall of the guide ring (3211) is in contact with the inner wall of the damping cavity (3111).

7. The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment according to claim 3, characterized in that, The limiting component (4) includes two sets of buffer blocks (41) and two sets of limiting platforms (42); the two sets of buffer blocks (41) are respectively sleeved on the outer walls of the first lead screw (312) and the second lead screw (313), and one side end face of the buffer block (41) is in contact with the corresponding end face of the adjusting sleeve (311); the two sets of limiting platforms (42) are respectively disposed on the outer walls of the first lead screw (312) and the second lead screw (313).

8. The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment according to claim 1, characterized in that, A seal (2112) is fitted at the opening of the ball joint cavity (2111), and the inner ring of the seal (2112) is fitted and sealed to the outer wall of the protruding end of the ball head (212).

9. The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment according to claim 1, characterized in that, The ball head (212) has a wear-resistant coating on its spherical surface.

10. The anti-vibration and anti-collision device for tension insulator strings based on multi-degree-of-freedom adjustment according to claim 1, characterized in that, The rotatable range of the universal ball joint (21) is ±30° pitch and yaw and ±360° circumferential torsion, and the rotatable angle range of the rotating joint (22) is ±25°.

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