Spacer for high-voltage power transmission line

Abstract

A spacer for a high-voltage power transmission line relates to the technical field of high-voltage power transmission line protection fittings and comprises an insulation frame of a polygonal structure, and clamping jaws used for being connected with cables are installed at the corner ends of the insulation frame. Hinge seats are arranged at corner ends and side line midpoints in the insulating frame, and at least one hinge seat is provided with an energy consumption device capable of adjusting prestress; the self-adaptability is high, the prestress of the energy consumption device can be automatically adjusted at different positions according to actual working conditions, more accurate energy dissipation control is provided, and the effectiveness of galloping suppression of the high-voltage transmission line is improved; by optimizing the working characteristics of the energy consumption device, mechanical wear and fatigue damage caused by waving are reduced, the service life of the high-voltage transmission line and related accessories is prolonged, and the maintenance cost is reduced; and components such as a limiting stud and a locking nut are adopted, so that the maximum deflection angle of the energy consumption device is effectively limited.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage transmission line protection hardware, in particular to a spacer bar for a high-voltage transmission line. Background Art

[0002] During the operation of high-voltage transmission lines, conductor dancing often occurs due to factors such as wind and icing. This dancing not only aggravates the mechanical wear of the conductor, but may also cause problems such as fatigue fracture of hardware and damage to insulators, seriously affecting the safety and stability of the power transmission system. Although traditional spacers can fix the spacing between split conductors to a certain extent, they have limitations in suppressing conductor dancing.

[0003] In order to solve the above problems, a variety of improvement schemes have been proposed in the prior art, such as using an energy dissipation device with a prestress adjustment function to enhance the inhibitory effect of the spacer on the conductor vibration. However, these schemes usually fail to fully consider the problem of amplitude differences at different positions, that is, the amplitude is larger in the middle of the two towers, while the amplitude is smaller near the towers. Therefore, when designing a spacer that can adjust the prestress, how to flexibly adjust the parameters of the energy dissipation device according to the installation environment and location has become the key to improving its performance in suppressing galloping.

[0004] A Chinese patent (publication number: CN208908346U) discloses a split conductor anti-dancing device; the patent has two connecting plates fixed on the frame, and a plurality of protrusions are provided on the connecting plates, the protrusions are matched and connected with one end of the spring, and the other end of the spring is connected to a weight, and the two sides of the weight are respectively connected to the two connecting plates through springs, and there are multiple weights, and two adjacent weights are also connected through springs; however, the patent also fails to fully consider the problem of amplitude differences at different positions, and cannot further improve the performance of suppressing the dancing of high-voltage transmission lines. Summary of the invention

[0005] In order to overcome the shortcomings of the background technology, the present invention discloses a spacer rod for a high-voltage transmission line, which aims to increase the prestress in the area with larger amplitude to quickly dissipate energy through reasonable configuration of the prestress setting of the energy consumption device; and reduce the prestress in the area with smaller amplitude to enhance the response sensitivity to slight vibrations, so as to more effectively prevent the expansion of the dancing of the high-voltage transmission line.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A spacer for high-voltage transmission lines comprises an insulating frame with a polygonal structure, wherein the corner ends of the insulating frame are provided with clamps for connecting with cables; the corner ends and the midpoints of the edges in the insulating frame are provided with hinged seats, and at least one hinged seat is provided with an energy consumption device capable of adjusting prestress.

[0007] Preferably, the energy consumption device includes a connecting seat, which is hinged to the hinge seat through an articulation shaft; the articulation shaft is sleeved with a torsion spring to keep the connecting seat vertical; both ends of the connecting seat are provided with a limit assembly to limit the swing angle of the connecting seat; the bottom of the connecting seat is fastened with a guide rod, and the guide rod body is slidably fitted with a weight, and the two ends of the guide rod corresponding to the weight are respectively sleeved with springs; the end of the guide rod corresponding to the spring facing away from the weight is threadedly connected with an adjusting nut, which is used to adjust the height position of the weight and the prestress of the spring.

[0008] Preferably, the limiting assembly includes a limiting stud threadedly connected to the connecting seat.

[0009] Preferably, the limiting stud corresponds to the top and the bottom of the connection seat which are both threadedly connected with locking nuts.

[0010] Preferably, an anti-collision ball head is provided at one end of the limiting stud corresponding to the hinge axis.

[0011] Preferably, the clamping jaw is universally connected to the insulating frame via a universal hinge device.

[0012] Preferably, the universal hinge device comprises a connecting ball head and a connecting ball seat installed between the clamping claw and the insulating frame, and the connecting ball head and the connecting ball seat correspond to the universal connection.

[0013] Preferably, a return spring is sleeved between the connecting ball head and the connecting ball seat.

[0014] Preferably, a limiting boss for limiting a reset spring is provided at one end of the connecting ball head corresponding to the connecting ball seat.

[0015] Preferably, the universal hinge device is adjustably connected to the insulating frame via an adjusting rod; the insulating frame is provided with a socket corresponding to the adjusting rod, and a plurality of positioning holes are provided at intervals on the adjusting rod body; a limit pin is provided on one side of the corresponding socket of the insulating frame and can be plugged into the corresponding positioning hole, so as to limit the moving range of the adjusting rod.

[0016] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: 1. The present invention discloses a spacer bar for a high-voltage transmission line, which has strong adaptability and can automatically adjust the prestress of an energy consumption device at different positions according to actual working conditions, thereby providing more accurate energy dissipation control and improving the effectiveness of suppressing the galloping of the high-voltage transmission line.

[0017] 2. Protect equipment: By optimizing the working characteristics of energy consumption devices, the mechanical wear and fatigue damage caused by dancing is reduced, the service life of high-voltage transmission lines and related accessories is extended, and the maintenance cost is reduced.

[0018] 3. Improved safety: It enhances the overall ability to resist adverse weather conditions and ensures the safety and reliability of power transmission, which is especially important for long-distance high-voltage transmission lines.

[0019] 4. Stable structure: The use of limit studs, locking nuts and other components ensures that the maximum deflection angle of the energy consumption device is effectively limited, avoiding the risk of accidental collision and ensuring the structural stability of the entire spacer bar.

[0020] 5. Easy maintenance: The design of all key components such as articulated shafts, torsion springs, weights, springs and adjusting nuts takes into account the needs of easy disassembly and replacement, making it convenient for on-site maintenance personnel to carry out daily maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 is a schematic diagram of the structure of an energy consumption device; Figure 4 It is a structural schematic diagram of a universal articulated device; Figure 5 It is a schematic diagram of the structure of the adjusting rod.

[0022] In the figure: 1. Insulating frame; 2. Clamping claw; 3. Articulated seat; 4. Energy consumption device; 4-1. Connecting seat; 4-2. Articulated shaft; 4-3. Guide rod; 4-4. Weight; 4-5. Spring; 4-6. Adjusting nut; 4-7. Limiting stud; 4-8. Locking nut; 4-9. Anti-collision ball head; 5. Universal hinge device; 5-1. Connecting ball head; 5-2. Connecting ball seat; 5-3. Reset spring; 5-4. Limiting boss; 6. Adjusting rod; 7. Positioning hole; 8. Limiting pin. DETAILED DESCRIPTION

[0023] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0024] Embodiment 1, in combination with Figures 1 to 3A spacer for a high-voltage transmission line comprises an insulating frame 1 having a polygonal structure, wherein the corner ends of the insulating frame 1 are provided with clamps 2 for connecting with cables; the insulating frame 1 and the clamps 2 are both existing structures, wherein the insulating frame 1 is used to fix the spacing between the split conductors of the high-voltage transmission line, and its shape is usually a quadrilateral, hexagon or octagon.

[0025] Hinge seats 3 are provided at the corner ends and the midpoints of the edges of the insulating frame 1, and at least one of the hinge seats is provided with an energy dissipation device 4 capable of adjusting the prestress. The prestress of the energy dissipation device 4 can be adjusted according to different installation environments and locations.

[0026] Normally, the amplitude of the high-voltage transmission line is larger in the middle position between two towers because the constraint is the smallest at this position; while the amplitude is relatively small near the tower due to the influence of the tower structure. Therefore, the prestress is increased in the area with larger amplitude to quickly dissipate energy; while the prestress is reduced in the area with smaller amplitude to enhance the sensitivity to vibration response, ensure that energy can be effectively absorbed even under slight vibration, prevent the amplification of the high-voltage transmission line galloping, and effectively suppress the galloping of the high-voltage transmission line.

[0027] As attached Figure 3 As shown, the energy dissipation device 4 includes a connection seat 4-1, which is connected to the hinge seat 3 through a hinge shaft 4-2. A torsion spring 4-5 is sleeved on the hinge shaft 4-2 to keep the connection seat 4-1 vertical. When the high-voltage transmission line swings left and right, the torsion spring 4-5 will dissipate energy by deformation to suppress the left and right swing of the line.

[0028] In order to limit the deflection angle of the entire energy consumption device 4 and avoid accidental collision with the insulating frame 1 or the high-voltage transmission line, a limit assembly is provided at each end of the connecting seat 4-1. The limit assembly includes a limit stud 4-7 threadedly connected to the connecting seat 4-1. The limit stud 4-7 contacts the insulating frame 1 to limit the maximum deflection angle of the energy consumption device 4. By adjusting the distance between the limit stud 4-7 and the insulating frame 1, the maximum swing amplitude of the entire energy consumption device 4 can be controlled.

[0029] In addition, locking nuts 4-8 are provided at the top and bottom of the limit stud 4-7 to fix the limit stud 4-7 to prevent it from loosening. The end of the limit stud 4-7 close to the hinge shaft 4-2 is equipped with an anti-collision ball head 4-9, which is made of soft materials such as nylon or rubber to protect the insulating frame 1 from damage.

[0030] The bottom of the connection seat 4-1 is fastened with a guide rod 4-3, a weight 4-4 is slidably fitted on the guide rod 4-3, and there is a spring 4-5 on each side of the weight 4-4. When the high-voltage transmission line vibrates up and down, the weight 4-4 and the two springs 4-5 work together to dissipate the vibration energy and suppress the up and down movement of the line.

[0031] Both ends of the guide rod 4-3 are threadedly connected with adjustment nuts 4-6, which are used to adjust the position of the weight 4-4 and the prestress of the spring 4-5. By changing the relative distance between the two adjustment nuts 4-6, the prestress of the spring 4-5 can be adjusted: the smaller the distance, the greater the prestress; conversely, the smaller the prestress. At the same time, by adjusting the position of the two adjustment nuts 4-6 on the guide rod 4-3, the height of the weight 4-4 can be adjusted, thereby affecting the bending moment borne by the connecting seat 4-1. The lower the position of the weight 4-4, the greater the bending moment applied to the connecting seat 4-1 when swinging left and right, making the energy consumption device 4 more sensitive to left and right swings.

[0032] In order to more effectively suppress the dancing of high-voltage transmission lines, the following adjustments are made according to the different installation positions of the energy dissipation device 4: the energy dissipation device 4 located between the two poles should raise the position of the weight 4-4 on its guide rod 4-3, and increase the prestress of the spring 4-5 at both ends of the weight; for the energy dissipation device 4 close to the pole, the position of the weight 4-4 on the guide rod 4-3 should be lowered, and the prestress of the spring 4-5 should be reduced. Such a configuration can provide appropriate vibration resistance at different positions and optimize the overall performance.

[0033] Embodiment 2, in combination with Figure 1 , 2 and 4, a spacer for a high-voltage transmission line, which is different from Example 1 in that, on the basis of Example 1, the clamping jaw 2 is flexibly and stably universally connected to the insulating frame 1 through a universal hinge device 5. This design allows the clamping jaw 2 to adapt to complex spatial torsion during the dancing of the high-voltage transmission line, effectively preventing damage caused by excessive twisting or improper force.

[0034] The universal joint device 5 comprises a connecting ball head 5-1 and a connecting ball seat 5-2 installed between the clamping jaw 2 and the insulating frame 1. A precise universal connection is achieved between the connecting ball head 5-1 and the connecting ball seat 5-2, so that the clamping jaw 2 can move freely in multiple directions while maintaining a stable connection with the insulating frame 1. This design not only improves the flexibility of the system, but also enhances its responsiveness to different vibration modes.

[0035] In order to limit the random swing between the connecting ball head 5-1 and the connecting ball seat 5-2, a return spring 5-3 is provided between the two. The return spring 5-3 can keep the connecting ball head 5-1 and the connecting ball seat 5-2 in a relatively stable position by pushing, without external force. Specifically, when the external vibration disappears, the return spring 5-3 will cause the connecting ball head 5-1 to automatically return to the initial position, thereby avoiding wear or fatigue damage that may be caused by long-term random movement.

[0036] In addition, a limiting boss 5-4 is provided at one end of the connecting ball head 5-1 corresponding to the connecting ball seat 5-2, which is used to limit the radial movement of the reset spring 5-3 along the connecting ball head 5-1. The design of the limiting boss 5-4 ensures that the reset spring 5-3 is always in the correct working position and will not be offset or fall off due to external factors, further ensuring the overall reliability and safety.

[0037] The universal articulated device 5 designed as above can not only flexibly cope with various challenges brought by the dancing of high-voltage transmission lines, but also effectively protect the clamping jaws 2 from damage, thereby ensuring the safe and stable operation of the power transmission system and providing a more reliable solution for high-voltage transmission lines.

[0038] Embodiment 3, in combination with Figure 1 , 2 and 5, a spacer for a high-voltage transmission line, based on embodiment 1 or 2, the universal articulated device 5 is adjustably connected to the insulating frame 1 via an adjusting rod 6. This design allows the relative position between the clamping jaw 2 and the insulating frame 1 to be flexibly adjusted according to the specific spacing between the split conductors in the high-voltage transmission line, thereby significantly improving the scope of application in different application scenarios.

[0039] Specifically, the insulating frame 1 is provided with a socket that matches the adjusting rod 6 to ensure that the two can be firmly connected. The rod body of the adjusting rod 6 is evenly distributed with multiple positioning holes 7. The design of these positioning holes allows the operator to select the most suitable installation position according to actual needs. At the same time, a limit pin 8 is provided on the side of the insulating frame 1 corresponding to the socket. This limit pin 8 can be accurately docked with any positioning hole 7 on the adjusting rod 6 to limit the movement range of the adjusting rod 6 and ensure that it remains stable and motionless in the working state.

[0040] Through such a design, not only the position of the clamping jaw 2 is precisely controlled, but also the overall adaptability and reliability are enhanced. When faced with different high-voltage transmission line configurations, the operator only needs to simply adjust the position of the adjustment rod 6 and lock it with the limit pin 8 to quickly complete the installation or reconfiguration without the need for complex tools or professional skills. This convenient adjustment method provides great convenience for on-site construction, and also ensures that the insulating frame 1 can function effectively under various conditions.

[0041] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A spacer bar for a high-voltage transmission line, comprising an insulating frame (1) having a polygonal structure, wherein the corner ends of the insulating frame (1) are each provided with a clamping claw (2) for connecting to a cable; wherein: Also includes: A hinge seat (3), wherein the corner ends and the midpoints of the edges in the insulating frame (1) are provided with a hinge seat (3); An energy dissipation device (4) is installed on at least one of the hinged seats (3), and the energy dissipation device can adjust the prestress to adapt to the vibration conditions at different positions, thereby more effectively suppressing the dancing of the conductor.

2. The spacer for high voltage transmission line according to claim 1, characterized in that: The energy consumption device (4) comprises: A connecting seat (4-1), the connecting seat (4-1) being correspondingly hinged to the hinge seat (3) via a hinge shaft (4-2); A torsion spring (4-5), the torsion spring being sleeved on the shaft of the hinge shaft (4-2) so as to keep the connecting seat (4-1) vertical and dissipate energy when swinging left and right; A limit assembly, with each end of the connecting seat (4-1) being provided with a limit assembly to limit the swing angle of the connecting seat (4-1); A guide rod (4-3), the guide rod being firmly connected to the bottom of the connection seat (4-1), the guide rod (4-3) being slidably matched with a weight (4-4), and springs (4-5) are respectively sleeved on both ends of the guide rod (4-3) corresponding to the weight (4-4); An adjusting nut (4-6) is threadedly connected to one end of the guide rod (4-3) corresponding to the spring (4-5) away from the weight (4-4) and is used to adjust the height of the weight (4-4) and the prestress of the spring (4-5).

3. The spacer for high voltage transmission line according to claim 2, characterized in that: The limiting assembly comprises a limiting stud (4-7) threadedly connected to the connecting seat (4-1).

4. The spacer for high voltage transmission line according to claim 3, characterized in that: The top and bottom of the limiting stud (4-7) corresponding to the connecting seat (4-1) are both threadedly connected with locking nuts (4-8) for fixing the position of the limiting stud to prevent it from loosening.

5. The spacer for high voltage transmission line according to claim 1, characterized in that: An anti-collision ball head (4-9) is provided at one end of the limiting stud (4-7) corresponding to the hinge shaft (4-2), and the anti-collision ball head is made of soft material to protect the insulating frame (1) from damage.

6. The spacer for high voltage transmission line according to claim 1, characterized in that: The clamping jaw (2) is universally connected to the insulating frame (1) via a universal hinge device (5), so that the clamping jaw (2) can move freely in multiple directions while maintaining a stable connection with the insulating frame.

7. The spacer for high voltage transmission line according to claim 6, characterized in that: The universal hinge device (5) comprises: a connecting ball head (5-1) and a connecting ball seat (5-2) installed between the clamping claw (2) and the insulating frame (1); the connecting ball head (5-1) and the connecting ball seat (5-2) are universally connected to allow the clamping claw (2) to move freely within a certain range.

8. The spacer for high voltage transmission line according to claim 7, characterized in that: A return spring (5-3) is sleeved between the connecting ball head (5-1) and the connecting ball seat (5-2), and the return spring (5-3) forces the connecting ball head (5-1) to return to an initial position when no external force is applied.

9. The spacer for high voltage transmission line according to claim 8, characterized in that: A limiting boss (5-4) for limiting the reset spring (5-3) is provided at one end of the connecting ball head (5-1) corresponding to the connecting ball seat (5-2), thereby preventing the reset spring (5-3) from moving radially along the connecting ball head.

10. The spacer bar for high voltage transmission line according to any one of claims 6 to 9, characterized in that: The universal hinge device (5) is adjustably connected to the insulating frame (1) via an adjusting rod (6); the insulating frame (1) is provided with a socket corresponding to the adjusting rod (6), and the adjusting rod (6) is provided with a plurality of positioning holes (7) at intervals; a limiting pin (8) capable of correspondingly plugging into the corresponding positioning hole (7) is provided on one side of the insulating frame (1) corresponding to the socket, and is used to limit the movement range of the adjusting rod (6).

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