A split conductor AC composite insulated phase spacer

Abstract

This invention relates to the field of spacer bar technology and discloses a split conductor AC composite insulated phase-to-phase spacer bar, comprising a hollow connecting frame with multiple venting support rods connected to the hollow connecting frame. Each venting support rod has a clamp fixed to its end. Each venting support rod includes a vertical tube, with a cold shrink sleeve fitted over the outside of the vertical tube. The cold shrink sleeve includes a vertical sleeve fitted over the outside of the vertical tube and a skirt fixed to the vertical sleeve. A rainwater removal structure is also provided inside the spacer bar. The rainwater removal structure includes an inflation mechanism installed inside the hollow connecting frame, multiple support rod vent holes on the vertical tube, and sleeve vent holes on the vertical sleeve corresponding to the positions of each support rod vent hole. Each sleeve vent hole is located below the skirt. This design not only allows the cold shrink sleeve to be set vertically but also allows the inflation mechanism installed inside the hollow connecting frame to inflate each vertical tube, thereby enabling the airflow blowing out from below the skirt to effectively remove rainwater.

Description

Technical Field

[0001] This invention relates to the field of spacer technology, specifically to a split conductor AC composite insulated phase-to-phase spacer. Background Technology

[0002] In high-voltage transmission lines, split-conductor AC composite insulated phase-to-phase spacers are critical components ensuring stable line operation, especially in four-split conductor systems, where their performance directly impacts transmission safety and efficiency. Traditional spacer insulation sleeves typically employ conventional designs, such as the integrated phase-to-phase damping spacer for a single-circuit transmission line (publication number CN105703298A) and the pre-stretched composite phase-to-phase spacer (publication number CN103944128A), where the support rods are either inclined or horizontal. This inclination not only disrupts the normal protective structure of the sheds (which offer the best protection when vertical), but also renders them ineffective at blocking rainwater intrusion during rainy weather, significantly reducing insulation performance and leading to faults such as flashover and partial discharge, seriously threatening the safe and stable operation of the power system.

[0003] Furthermore, traditional spacer bar insulation skirts cannot quickly and effectively remove rainwater after it accumulates, and the residual rainwater forms a continuous water film on the skirt surface, significantly reducing insulation strength. With the increasing demands of power grid operation, there is an urgent need for a spacer bar that can ensure the insulation skirts remain vertical and has efficient rainproof capabilities to improve the insulation reliability and operational stability of transmission lines. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a split conductor AC composite insulated phase-to-phase spacer bar. It offers advantages such as maximizing the insulation effect of the insulating skirt while maintaining the shock-absorbing effect of the spacer bar, and improving its rainproof effect during windy and rainy weather. The problem it solves is that in existing technologies, the support rods are either inclined or horizontal. This inclination not only disrupts the normal protective structure of the skirt, but also prevents the traditional spacer bar's insulating skirt from quickly and effectively removing rainwater after it accumulates. The residual rainwater forms a continuous water film on the skirt surface, significantly reducing the insulation strength.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A split conductor AC composite insulation phase-to-phase spacer includes a hollow connecting frame with multiple venting supports connected to the hollow connecting frame. Each venting support has a clamp fixed to its end, and each clamp is fixed to a different cable. Each venting support includes a vertical tube, and a cold shrink sleeve is fitted onto the outside of the vertical tube. The cold shrink sleeve includes a vertical sleeve fitted onto the outside of the vertical tube and a skirt fixed onto the vertical sleeve. A rainwater removal structure is also provided inside the spacer.

[0009] The rainwater removal structure includes an inflation mechanism installed in the hollow connecting frame. The ventilation support rod is configured as a hollow pipe. Multiple support rod vent holes are provided on the vertical pipe. Sleeve vent holes are provided on the vertical sleeve at positions corresponding to the support rod vent holes. Each sleeve vent hole is located below the umbrella skirt. The connection between the umbrella skirt and the vertical sleeve is the root. The height of the umbrella skirt root is higher than the height of the umbrella skirt edge. The sleeve vent holes are higher than the height of the umbrella skirt edge but lower than the height of the umbrella skirt root.

[0010] The hollow connecting frame connects the radial structure of each ventilation support rod, which diffuses outward from the center. This facilitates the installation of vertical pipes inside the ventilation support rods, while the inflation mechanism inside the hollow connecting frame can inflate each vertical pipe, thereby enabling the airflow blowing out from below the umbrella skirt to effectively remove rainwater.

[0011] Preferably, the spacer bar is further provided with an adjustable elastic clamping structure, the adjustable elastic clamping structure includes an elastic pad provided on the clamp and a lifting adjustment column provided in the vertical tube, the elastic pad is provided with an airbag cavity, the clamp is provided with an inflation channel, and the part where the clamp is connected to the air support rod is provided with an inflation channel.

[0012] The part where the venting support rod connects to the clamp is provided with a clamp connecting seat. The clamp connecting seat has a downwardly protruding central venting column inside the vertical tube. The central venting column has a side hole on its side, and the side hole is connected to the inflation channel during installation.

[0013] Preferably, the lifting adjustment column has multiple inwardly recessed adjustment column annular grooves on its side, and an adjustment column exhaust hole on the adjustment column annular grooves connects to the internal cavity of the lifting adjustment column. The outer side of the lifting adjustment column is attached to the inner wall of the vertical pipe, and the end of the lifting adjustment column is provided with a constriction and attached to the central vent column.

[0014] When not inflated, the lifting and adjusting column is located at the end of the vertical tube away from the clamp under the action of gravity or spring. At this time, the central vent column is located outside the end of the lifting and adjusting column. The annular grooves of each adjusting column are lower than the exhaust holes of each support rod, so that the lifting and adjusting column covers the exhaust holes of each support rod to prevent dust. When inflated, the lifting and adjusting column slides towards the clamp under the action of air pressure. At this time, the cavity of the central vent column and the lifting and adjusting column are connected, and air is inflated into the elastic pad to increase its elastic clamping force. The annular groove of the adjusting column rises to the position of the exhaust hole of the support rod, so that the airflow in the vertical tube is discharged outward through the exhaust holes of the adjusting column, the exhaust holes of the support rod, and the exhaust holes of the sleeve, thereby removing rainwater.

[0015] Preferably, the cold shrink tubing is further provided with a double umbrella skirt structure. The double umbrella skirt structure is provided below the original umbrella skirts, with a lower umbrella skirt below each umbrella skirt. In a double umbrella skirt structure, the height of the umbrella skirt root is higher than the height of the tubing vent hole, the height of the tubing vent hole is higher than the height of the lower umbrella skirt root, the height of the lower umbrella skirt root is higher than the height of the umbrella skirt edge, and the height of the umbrella skirt edge is higher than the height of the lower umbrella skirt edge. The airflow blown out by the tubing vent hole is located in the gap between the umbrella skirt and the lower umbrella skirt. The gap is constricted, that is, the gap is narrower closer to the edge of the umbrella skirt and wider closer to the tubing vent hole inside the umbrella skirt.

[0016] The lower umbrella skirt, located at the bottom of the umbrella skirt, can tighten the airflow and increase the impact force of the airflow. At the same time, the lower umbrella skirt at the bottom of the umbrella skirt can further prevent the formation of water film. The water flowing down along the bottom of the umbrella skirt will be blocked by the lower umbrella skirt and blown outward by the airflow.

[0017] Preferably, in any double-skirt structure, the outer diameter of the lower skirt edge is smaller than the outer diameter of the skirt edge.

[0018] Preferably, the inflation mechanism inside the hollow coupling includes a cavity disposed inside the hollow coupling, the cavity inside the hollow coupling being connected to each ventilation support rod, and also includes an air pump fixedly installed on the hollow coupling, the air outlet of the air pump being connected to the cavity inside the hollow coupling through an air supply pipe.

[0019] Preferably, the hollow connecting frame has a central hole at its center, and arc-shaped sleeves are provided on both sides of the hollow connecting frame. The arc-shaped sleeves are used to wrap the air pump installed on the hollow connecting frame. The arc-shaped sleeves are provided with air inlets. The arc-shaped sleeves have an arc-shaped protrusion structure. The arc-shaped sleeves and the central hole are used to divert the airflow blown to the end face of the hollow connecting frame, thereby reducing the wind resistance experienced by the hollow connecting frame.

[0020] Preferably, the vertical pipe and the hollow support frame are connected by a connecting pipe, which is an inclined or horizontal hollow pipe.

[0021] Preferably, the bottom of the clamp connector is provided with a bottom hole, the bottom hole is provided with an internal thread, the central vent column is located inside the bottom hole, the end of the vertical tube is provided with an external thread, and the bottom hole and the end of the vertical tube are connected by threads.

[0022] Preferably, a support column is provided at the bottom of the chuck, and the support column is connected and fixed to the chuck connecting seat by a fixing rod. The chuck connecting seat is provided with a horizontally penetrating connecting seat mounting hole, and the support column is provided with a horizontally penetrating support column mounting hole at the position of the connecting seat mounting hole. The fixing rod passes through the connecting seat mounting hole and the support column mounting hole to fix the support column to the chuck connecting seat.

[0023] The inflation channel passes vertically through the mounting hole of the support column, and the fixing rod is provided with an inwardly recessed fixing rod groove in the mounting hole of the support column, so as to connect the upper and lower inflation channels through the fixing rod groove.

[0024] (III) Beneficial Effects

[0025] Compared with the prior art, the present invention provides a split conductor AC composite insulated phase-to-phase spacer bar, which has the following beneficial effects:

[0026] 1. This split conductor AC composite insulated phase-to-phase spacer uses a hollow connecting frame to connect the centers of each ventilated support rod, creating a radial structure that diffuses outwards. This facilitates the installation of vertical pipes within the ventilated support rods while simultaneously allowing the inflation mechanism within the hollow connecting frame to inflate each vertical pipe. This enables the airflow blowing out from below the umbrella skirt to effectively remove rainwater, maximizing the umbrella skirt's function while effectively removing rainwater from its surface. This prevents rainwater from accumulating on the umbrella skirt surface and forming a continuous water film, thus preventing insulation performance degradation and flashover caused by the water film. This ensures the insulation reliability of the spacer in humid environments, reduces maintenance costs and safety hazards caused by rainwater, and guarantees the stable operation of the power transmission system.

[0027] 2. This split conductor AC composite insulation phase spacer bar, based on the setting of a vertical cold shrink sleeve and an air blowing structure with a blower to remove the water film, has a sliding lifting adjustment column installed inside the vertical tube. When not inflated, the lifting adjustment column can cover the exhaust hole of the support rod to achieve a dust prevention effect. When inflated, it can not only use part of the airflow to blow away the water film, but also use part of the airflow to inflate the elastic pad, thereby increasing the clamping force on the cable. It achieves the purpose of using one mechanism to realize multiple functions. At the same time, by controlling the power of the air pump, different clamping forces can be controlled according to the wind level. It can even further increase the clamping force by closing the exhaust hole of the support rod, thereby coping with extreme wind weather.

[0028] 3. This split conductor AC composite insulated phase spacer bar, by setting a double umbrella skirt structure, places the bushing vent hole between the umbrella skirt and the bushing vent hole. The airflow blown out of the bushing vent hole is located in the gap between the umbrella skirt and the lower umbrella skirt. The gap is constricted, that is, the gap is narrower closer to the edge of the umbrella skirt and wider closer to the bushing vent hole inside the umbrella skirt. This can tighten the airflow and increase the airflow impact force. At the same time, the lower umbrella skirt located at the bottom of the umbrella skirt can further prevent the formation of water film. The water flowing down along the bottom of the umbrella skirt will be blocked by the lower umbrella skirt and blown outward by the airflow. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention when it is installed on a cable.

[0030] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0031] Figure 3 This is a cross-sectional view of the ventilation support rod, cold shrink sleeve, cold shrink sleeve, clamp, and the connection part of the lifting adjustment column of the present invention.

[0032] Figure 4 This invention is performed under normal conditions (when no air is injected into the ventilated support rod). Figure 3 A magnified view of region A in the middle.

[0033] Figure 5 This invention is applicable during windy and rainy weather (when inflating the ventilated support rod). Figure 3 A magnified view of region A in the middle.

[0034] Figure 6 This is an exploded view of the ventilation support rod, cold shrink sleeve, cold shrink sleeve, clamp, and the connection part of the lifting adjustment column of the present invention.

[0035] Figure 7 This is a schematic diagram of the ventilation support rod of the present invention.

[0036] Figure 8 This is a schematic diagram of the structure of the clamp connector of the present invention.

[0037] Figure 9 This is a schematic diagram of the structure of the connection between the hollow connecting frame and the four ventilation support rods (after hiding the clamp connecting seat) in this invention.

[0038] Figure 10 This is a schematic diagram of the hollow connecting frame (after hiding the arc-shaped sleeve) in this invention.

[0039] Figure 11 This is a schematic diagram of the cold shrink tubing of the present invention.

[0040] Figure 12 This is a schematic diagram of the lifting and adjusting column of the present invention.

[0041] Figure 13 This is a schematic diagram of the structure of the chuck of the present invention.

[0042] Figure 14 This is a schematic diagram of another type of cold shrink tubing (double umbrella skirt structure) according to the present invention.

[0043] Figure 15 This is a cross-sectional view of another type of cold shrink tubing (double umbrella skirt structure) of the present invention.

[0044] In the diagram: 1. Hollow connecting frame; 11. Central hole; 12. Arc-shaped sleeve; 13. Air pump; 14. Air supply pipe;

[0045] 2. Ventilation support rod; 21. Connecting pipe; 22. Vertical pipe; 23. Clamp connector; 221. Support rod exhaust port; 231. Bottom hole; 232. Central vent column; 233. Side hole; 234. Connector mounting hole; 235. Fixing rod; 236. Fixing rod annular groove;

[0046] 3. Cold shrink tubing; 31. Vertical sleeve; 32. Umbrella skirt; 33. Tube vent; 34. Lower umbrella skirt;

[0047] 4. Clamp; 41. Elastic pad; 42. Support column; 43. Inflation channel; 421. Support column mounting hole;

[0048] 5. Lifting and adjusting column; 51. Adjusting column annular groove; 52. Adjusting column vent hole;

[0049] 9. Cables. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 this invention.

[0052] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] Example 1:

[0055] This embodiment provides a split conductor AC composite insulated phase-to-phase spacer bar with the following technical features.

[0056] Please see Figure 1-15 A split conductor AC composite insulation phase spacer includes a hollow connecting frame 1, on which multiple ventilation support rods 2 are connected. Each ventilation support rod 2 has a clamp 4 fixed at its end, and each clamp 4 is fixed to a different cable 9. The ventilation support rod 2 includes a vertical tube 22, and a cold shrink sleeve 3 is sleeved on the outside of the vertical tube 22. The cold shrink sleeve 3 includes a vertical sleeve 31 sleeved on the outside of the vertical tube 22 and a skirt 32 fixed on the vertical sleeve 31. A rainwater removal structure is also provided inside the spacer.

[0057] The rainwater removal structure includes an inflation mechanism installed in the hollow connecting frame 1, a venting support rod 2 is configured as a hollow pipe, a number of support rod vent holes 221 are provided on the vertical pipe 22, and a sleeve vent hole 33 is provided on the vertical sleeve 31 at the position corresponding to each support rod vent hole 221. Each sleeve vent hole 33 is located below the umbrella skirt 32. The connection between the umbrella skirt 32 and the vertical sleeve 31 is the root. The height of the root of the umbrella skirt 32 is higher than the height of the edge of the umbrella skirt 32. The sleeve vent hole 33 is higher than the height of the edge of the umbrella skirt 32 and lower than the height of the root of the umbrella skirt 32.

[0058] The hollow connecting frame 1 connects the radial structure of each ventilation support rod 2, which diffuses outward from the center. This facilitates the installation of vertical pipes 22 inside the ventilation support rod 2, while the inflation mechanism installed in the hollow connecting frame 1 can inflate each vertical pipe 22, thereby enabling the airflow blown out from below the umbrella skirt 32 to effectively remove rainwater.

[0059] In an optional embodiment, an adjustable elastic clamping structure is also provided inside the spacer bar. The adjustable elastic clamping structure includes an elastic pad 41 provided on the clamp 4 and a lifting adjustment column 5 that slides inside the vertical tube 22. An air bladder cavity is provided inside the elastic pad 41, an inflation channel 43 is provided inside the clamp 4, and an inflation channel 43 is provided at the part where the clamp 4 is connected to the ventilated support rod 2.

[0060] The part where the ventilation support rod 2 connects to the clamp 4 is provided with a clamp connecting seat 23. The clamp connecting seat 23 has a downward protruding central ventilation column 232 inside the vertical tube 22. The central ventilation column 232 has a side hole 233 on the side. The side hole 233 is connected to the inflation channel 43 during installation.

[0061] It should be noted that the air bladder cavity inside the elastic pad 41 is completely flat when it is not inflated, and the rubber thickness of the side of the elastic pad 41 near the cable 9 is greater than or equal to 3 cm, providing a certain support force when it is not inflated.

[0062] In an optional embodiment, the lifting adjustment column 5 is provided with a plurality of inwardly recessed adjustment column annular grooves 51 on its side, and adjustment column exhaust holes 52 are provided on the adjustment column annular grooves 51 to connect to the internal cavity of the lifting adjustment column 5. The outer side of the lifting adjustment column 5 is attached to the inner wall of the vertical pipe 22, and the end of the lifting adjustment column 5 is provided with a constriction and attached to the central vent column 232.

[0063] When the lifting adjustment column 5 is not inflated, it is located at the end of the vertical tube 22 away from the clamp 4 under the action of gravity or spring. At this time, the central vent column 232 is located outside the end of the lifting adjustment column 5. The annular grooves 51 of each adjustment column are lower than the exhaust holes 221 of each support rod, so that the lifting adjustment column 5 covers the exhaust holes 221 of each support rod to prevent dust. When the lifting adjustment column 5 is inflated, it slides towards the side closer to the clamp 4 under the action of air pressure. At this time, the central vent column 232 is connected to the cavity of the lifting adjustment column 5, and inflates the elastic pad 41 to increase its elastic clamping force. The annular grooves 51 of the adjustment column rise to the position of the exhaust holes 221 of the support rod, so that the airflow in the vertical tube 22 is discharged outward through the exhaust holes 52 of the adjustment column, the exhaust holes 221 of the support rod and the exhaust holes 33 of the sleeve, thereby removing rainwater.

[0064] It should be noted that the inflation of the lifting adjustment column 5 refers to the inflation structure inside the hollow connecting frame 1 inflating the ventilated support rod 2. The end of the lifting adjustment column 5 away from the clamp 4 is provided with an opening that communicates with the cavity inside the ventilated support rod 2, thereby inflating the lifting adjustment column 5.

[0065] In an optional embodiment, the cold shrink tubing 3 is further provided with a double umbrella skirt structure. The double umbrella skirt structure is provided with a lower umbrella skirt 34 below the original umbrella skirts 32. In a double umbrella skirt structure, the height of the root of the umbrella skirt 32 is higher than the height of the vent hole 33 of the tubing, the height of the vent hole 33 of the tubing is higher than the height of the root of the lower umbrella skirt 34, the height of the root of the lower umbrella skirt 34 is higher than the height of the edge of the umbrella skirt 32, and the height of the edge of the umbrella skirt 32 is higher than the height of the edge of the lower umbrella skirt 34. The airflow blown out from the vent hole 33 of the tubing is located in the gap between the umbrella skirt 32 and the lower umbrella skirt 34. The gap is narrower, that is, the closer to the edge of the umbrella skirt, the narrower the gap, and the closer to the inner part of the umbrella skirt, the wider the gap.

[0066] The lower umbrella skirt 34, located at the bottom of the umbrella skirt 32, can tighten the airflow and increase the impact force of the airflow. At the same time, the lower umbrella skirt 34, located at the bottom of the umbrella skirt 32, can further prevent the formation of water film. The water flowing downward along the bottom surface of the umbrella skirt 32 will be blocked by the lower umbrella skirt 34 and blown outward by the airflow.

[0067] It should be noted that the cold shrink tubing 3 is a cold shrink tube made of silicone rubber. During manufacturing, a special process is used to pre-expand the silicone rubber and fit it onto a support core. Silicone rubber has good elasticity and memory properties; it deforms under external force, but attempts to return to its original shape after the force is removed. When installing the cold shrink tubing 3, it is placed on the vertical tube 22, and then the support core is removed. Due to the elastic memory effect of silicone rubber, the unsupported cold shrink tubing 3 quickly shrinks and tightly adheres to the surface of the vertical tube 22, thus achieving the protective functions of insulation and sealing for the spacer. This cold shrink method requires no heating tools, is easy to operate, can adapt to objects of different shapes and sizes, and can be quickly installed at room temperature.

[0068] It should be noted that the vent hole 33 is a small hole cut by a tool at the position of the vent hole 221 of the support rod after the cold shrink sleeve 3 is installed.

[0069] In an optional embodiment, in any double-skirt structure, the outer diameter at the edge of the lower skirt 34 is smaller than the outer diameter at the edge of the skirt 32.

[0070] In an optional embodiment, the inflation mechanism inside the hollow connecting frame 1 includes a cavity disposed inside the hollow connecting frame 1, the cavity inside the hollow connecting frame 1 being connected to each ventilation support rod 2, and also includes an air pump 13 fixedly installed on the hollow connecting frame 1, the air outlet of the air pump 13 being connected to the cavity inside the hollow connecting frame 1 through an air supply pipe 14.

[0071] In an optional embodiment, a central hole 11 is provided at the center of the hollow connecting frame 1, and arc-shaped sleeves 12 are provided on both sides of the hollow connecting frame 1. The arc-shaped sleeves 12 are used to wrap the air pump 13 installed on the hollow connecting frame 1. An air inlet is provided on the arc-shaped sleeves 12. The arc-shaped sleeves 12 have an arc-shaped protrusion structure. The arc-shaped sleeves 12 and the central hole 11 are used to split the airflow blown to the end face of the hollow connecting frame 1, thereby reducing the wind resistance of the hollow connecting frame 1.

[0072] In an optional embodiment, the vertical pipe 22 is connected to the hollow support frame 1 by a connecting pipe 21, which is an inclined or horizontal hollow pipe.

[0073] In an optional embodiment, the bottom of the chuck connector 23 is provided with a bottom hole 231, the bottom hole 231 is provided with an internal thread, the central vent column 232 is located inside the bottom hole 231, the end of the vertical tube 22 is provided with an external thread, and the bottom hole 231 and the end of the vertical tube 22 are connected by threads.

[0074] In an optional embodiment, a support column 42 is provided at the bottom of the chuck 4. The support column 42 is connected and fixed to the chuck connecting seat 23 by a fixing rod 235. The chuck connecting seat 23 is provided with a horizontally penetrating connecting seat mounting hole 234. The support column 42 is provided with a horizontally penetrating support column mounting hole 421 at the position of the connecting seat mounting hole 234. The fixing rod 235 passes through the connecting seat mounting hole 234 and the support column mounting hole 421 to fix the support column 42 to the chuck connecting seat 23.

[0075] The inflation channel 43 passes vertically through the support column mounting hole 421. The fixing rod 235 is provided with an inwardly recessed fixing rod annular groove 236 in the support column mounting hole 421, thereby connecting the upper and lower sections of the inflation channel 43 through the fixing rod annular groove 236.

[0076] In an optional embodiment, the elastic pad 41 is made of silicone rubber material, which has good insulation, abrasion resistance and elasticity, and can maintain a stable elastic clamping force under different temperature environments.

[0077] In an optional embodiment, the air pump 13 is connected to a control module, which is equipped with a humidity sensor and a wind speed sensor. The humidity sensor is used to detect the ambient humidity, and when the ambient humidity reaches a set threshold, it controls the air pump 13 to start. The wind speed sensor is used to detect the ambient wind speed, and when the wind speed exceeds a set threshold, it controls the air pump 13 to increase the inflation volume to enhance the rainwater removal effect and the stability of the spacer bar.

[0078] In an optional embodiment, in any double-skirt structure, the height of the umbrella skirt 32 is 80-120mm, the height of the lower umbrella skirt 34 is 50-80mm, and the difference between the outer diameter of the edge of the umbrella skirt 32 and the outer diameter of the edge of the lower umbrella skirt 34 is 20-40mm. Through reasonable size design, the airflow channel is optimized and the rainwater removal efficiency is improved.

[0079] In one optional embodiment, the number of ventilation support rods 2 is 3, 4, 5 or 6, corresponding to different specifications of split conductors. When the spacer rod is used for 4-split conductors of 220kV transmission line, the number of ventilation support rods 2 is 4, and each ventilation support rod 2 is evenly distributed on the hollow connecting frame 1.

[0080] In an optional embodiment, the lifting adjustment column 5 is connected to the inner wall of the vertical tube 22 by a compression spring. The elastic coefficient of the compression spring is 10-20 N / m, and the initial compression of the spring is 10-20 mm, ensuring that the lifting adjustment column 5 can be stably in the initial position when there is no air pressure, and can slide flexibly when inflated.

[0081] In an optional embodiment, the main body of the spacer is made of aluminum alloy, and the surface of the aluminum alloy is oxidized.

[0082] In an optional embodiment, the spacer bar is further provided with a power module for providing electrical power to the inflation mechanism; the power module adopts any one of the following three methods:

[0083] Method 1: A photovoltaic power generation panel is provided on the outer surface of the hollow connecting frame 1. The photovoltaic power generation panel is electrically connected to the air pump 13 and provides power for the operation of the air pump 13 by converting solar energy into electrical energy.

[0084] Method 2: A wire vibration power generation device is provided on the ventilation support rod 2 or clamp 4. The wire vibration power generation device includes a vibration sensing component and a power generation component fixed on the ventilation support rod 2 or clamp 4. The vibration sensing component transmits the vibration of the cable 9 to the power generation component. The power generation component converts the vibration energy into electrical energy and is electrically connected to the air pump 13 to power the inflation mechanism.

[0085] Method 3: A wind power generation device is installed at the central hole 11 at the center of the hollow connecting frame 1. The wind power generation device includes a wind blade assembly and a power generation assembly located in the central hole 11. When the airflow passes through the central hole 11, it drives the wind blade assembly to rotate. The wind blade assembly drives the power generation assembly to generate electricity. The power generation assembly is electrically connected to the air pump 13 to provide the required electrical energy for the inflation mechanism.

[0086] Working principle:

[0087] Phase 1: When there is no wind or rain, or only light wind and light rain, air pump 13 is turned off. Figure 4 As shown. At this time, the lifting adjustment column 5 slides into the vertical tube 22 away from the clamp 4 under the action of gravity or spring. The outer wall of the lifting adjustment column 5 covers the exhaust hole 221 of the support rod to prevent dust from entering.

[0088] Phase Two: When wind force is greater than or equal to level 5 during strong winds or heavy rain, air pump 13 will start. Figure 5 As shown, at this time, the lifting adjustment column 5 slides to the side of the clamp 4 under the action of air pressure, so that the side hole 233 is connected with the cavity inside the lifting adjustment column 5, and the adjustment column ring groove 51 is connected with the support rod exhaust hole 221. At this time, part of the airflow is inflated into the elastic pad 41 through the side hole 233 and the inflation channel 43, which improves the clamping elasticity of the elastic pad 41, thereby strengthening the clamping of the cable 9 in windy and rainy weather. Normally, it is not inflated, which can improve the service life. Another part of the airflow is blown out from the support rod exhaust hole 221 and the sleeve exhaust hole 33. The blown airflow extends outward at the bottom of the umbrella skirt 32, thereby blowing away the water droplets, water film and continuous water flow hanging under the umbrella skirt 32.

[0089] Stage 3: When the wind force is greater than or equal to level 8, the air pump 13 operates at high power or multiple air pumps 13 are started at the same time. At this time, the lifting adjustment column 5 slides upward. The side hole 233 continues to be connected with the inner cavity of the lifting adjustment column 5. However, after the adjustment column ring groove 51 is higher than the support rod exhaust hole 221, the outer wall of the lifting adjustment column 5 covers the support rod exhaust hole 221 again. At this time, all the airflow blown out of the air pump 13 is replenished into the elastic pad 41, which greatly improves the clamping force on the cable 9.

[0090] In summary, this split conductor AC composite insulated phase-to-phase spacer, through the use of a hollow connecting frame 1 connecting each ventilated support rod 2 in a radial structure that diffuses outwards from the center, facilitates the installation of vertical pipes 22 inside the ventilated support rod 2. Simultaneously, the air-filling mechanism within the hollow connecting frame 1 can inflate each vertical pipe 22, thereby allowing the airflow blowing out from below the umbrella skirt 32 to effectively remove rainwater. This maximizes the function of the umbrella skirt while effectively removing rainwater from the surface of the umbrella skirt 32, preventing rainwater from accumulating on the surface of the umbrella skirt 32 and forming a continuous water film. This prevents insulation performance degradation and flashover caused by the water film, ensuring the insulation reliability of the spacer in humid environments, reducing maintenance costs and safety hazards caused by rainwater, and guaranteeing the stable operation of the power transmission system.

[0091] This split conductor AC composite insulation phase spacer bar, based on the setting of a vertical cold shrink sleeve 3 and an air blowing structure with a blower to remove the water film, has a sliding lifting adjustment column 5 set in the vertical tube 22. When not inflated, the lifting adjustment column 5 can cover the exhaust hole 221 of the support rod to achieve a dust prevention effect. When inflated, it can not only use a part of the airflow to blow away the water film, but also use a part of the airflow to inflate the elastic pad 41, thereby increasing the clamping force on the cable 9. It achieves the purpose of using one mechanism to realize multiple functions. At the same time, by controlling the power of the air pump 13, different clamping forces can be controlled according to the wind level. It can even further increase the clamping force by closing the exhaust hole 221 of the support rod, thereby coping with extreme wind weather.

[0092] This split conductor AC composite insulated phase spacer bar, by setting a double umbrella skirt structure, places the bushing vent 33 between the umbrella skirt 32 and the bushing vent 33. The airflow blown out by the bushing vent 33 is located in the gap between the umbrella skirt 32 and the lower umbrella skirt 34. The gap is constricted, that is, the gap is narrower closer to the edge of the umbrella skirt and wider closer to the bushing vent 33 inside the umbrella skirt. This can tighten the airflow and increase the impact force of the airflow. At the same time, the lower umbrella skirt 34 located at the bottom of the umbrella skirt 32 can further prevent the formation of water film. The water flowing down along the bottom surface of the umbrella skirt 32 will be blocked by the lower umbrella skirt 34 and blown outward by the airflow.

[0093] 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.

[0094] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A split conductor AC composite insulated phase-to-phase spacer, characterized in that, The device includes a hollow support frame (1), on which multiple ventilation support rods (2) are connected. Each ventilation support rod (2) has a clamp (4) fixed at its end. Each clamp (4) is fixed to a different cable (9). The ventilation support rod (2) includes a vertical pipe (22). A cold shrink sleeve (3) is sleeved on the outside of the vertical pipe (22). The cold shrink sleeve (3) includes a vertical sleeve (31) sleeved on the outside of the vertical pipe (22) and a skirt (32) fixed on the vertical sleeve (31). The spacer bar is also provided with a rainwater removal structure, which includes an inflation mechanism provided in the hollow connecting frame (1). The ventilation support rod (2) is a hollow pipe. Multiple support rod exhaust holes (221) are provided on the vertical pipe (22). On the vertical sleeve (31), a sleeve exhaust hole (33) is provided at the position corresponding to each support rod exhaust hole (221). Each sleeve exhaust hole (33) is located below the umbrella skirt (32). The connection between the umbrella skirt (32) and the vertical sleeve (31) is the root. The height of the root of the umbrella skirt (32) is higher than the height of the edge of the umbrella skirt (32). The sleeve exhaust hole (33) is higher than the height of the edge of the umbrella skirt (32) and lower than the height of the root of the umbrella skirt (32). The hollow connecting frame (1) connects the radial structure of each ventilation support rod (2) from the center outwards, which facilitates the installation of vertical pipes (22) inside the ventilation support rod (2) and allows the inflation mechanism installed in the hollow connecting frame (1) to inflate each vertical pipe (22), so that the airflow blown out from below the umbrella skirt (32) can effectively remove rainwater. An adjustable elastic clamping structure is also provided inside the spacer bar. The adjustable elastic clamping structure includes an elastic pad (41) provided on the clamp (4) and a lifting adjustment column (5) that slides inside the vertical tube (22). An air bladder cavity is provided inside the elastic pad (41). An inflation channel (43) is provided inside the clamp (4). An inflation channel (43) is provided at the part where the clamp (4) is connected to the ventilation support rod (2). The lifting adjustment column (5) has multiple inwardly recessed adjustment column annular grooves (51) on its side. The adjustment column annular grooves (51) are provided with adjustment column exhaust holes (52) that connect to the internal cavity of the lifting adjustment column (5). The outer side of the lifting adjustment column (5) is attached to the inner wall of the vertical pipe (22). The end of the lifting adjustment column (5) is provided with a constriction and attached to the central ventilation column (232). The inflation mechanism inside the hollow connecting frame (1) also includes an air pump (13) fixedly installed on the hollow connecting frame (1). The air pump (13) is connected to a control module. The control module is equipped with a humidity sensor and a wind speed sensor. The humidity sensor is used to detect the ambient humidity. When the ambient humidity reaches a set threshold, the air pump (13) is controlled to start. The wind speed sensor is used to detect the ambient wind speed. When the wind speed exceeds a set threshold, the air pump (13) is controlled to increase the inflation volume to enhance the rainwater removal effect and the stability of the spacer.

2. The split conductor AC composite insulated phase-to-phase spacer according to claim 1, characterized in that, The venting support rod (2) is provided with a clamp connecting seat (23) at the connection point with the clamp (4). The clamp connecting seat (23) has a downwardly protruding central venting column (232) inside the vertical tube (22). The central venting column (232) has a side hole (233) on its side. The side hole (233) is connected to the inflation channel (43) during installation.

3. The split conductor AC composite insulated phase-to-phase spacer according to claim 2, characterized in that, When the lifting adjustment column (5) is not inflated, it is located at the end of the vertical tube (22) away from the clamp (4) under the action of gravity or spring. At this time, the central ventilation column (232) is located outside the end of the lifting adjustment column (5). The ring groove (51) of each adjustment column is lower than the position of the exhaust hole (221) of each support rod, so that the lifting adjustment column (5) covers the exhaust hole (221) of each support rod to achieve dust prevention. When the lifting adjustment column (5) is inflated, it slides to the side closer to the clamp (4) under the action of air pressure. At this time, the central ventilation column (232) is connected to the cavity of the lifting adjustment column (5), and inflates the elastic pad (41) to increase its elastic clamping force. The ring groove (51) of the adjustment column rises to the position of the exhaust hole (221) of the support rod, so that the airflow in the vertical tube (22) is discharged outward through the exhaust hole (52) of the adjustment column, the exhaust hole (221) of the support rod and the exhaust hole (33) of the sleeve, thereby clearing rainwater.

4. The split conductor AC composite insulated phase-to-phase spacer according to claim 3, characterized in that, The cold shrink sleeve (3) is also provided with a double umbrella skirt structure. The double umbrella skirt structure is provided with a lower umbrella skirt (34) below each umbrella skirt (32). In a double umbrella skirt structure, the height of the root of the umbrella skirt (32) is higher than the height of the sleeve exhaust hole (33), the height of the sleeve exhaust hole (33) is higher than the height of the root of the lower umbrella skirt (34), the height of the root of the lower umbrella skirt (34) is higher than the height of the edge of the umbrella skirt (32), and the height of the edge of the umbrella skirt (32) is higher than the height of the edge of the lower umbrella skirt (34). The airflow blown out by the sleeve exhaust hole (33) is located in the gap between the umbrella skirt (32) and the lower umbrella skirt (34). The gap is narrowed, that is, the closer to the edge of the umbrella skirt, the narrower the gap, and the closer to the sleeve exhaust hole (33) inside the umbrella skirt, the wider the gap. The lower umbrella skirt (34) located at the bottom of the umbrella skirt (32) can tighten the airflow and increase the impact force of the airflow. At the same time, the lower umbrella skirt (34) located at the bottom of the umbrella skirt (32) can further prevent the formation of water film. The water flowing down along the bottom surface of the umbrella skirt (32) will be blocked by the lower umbrella skirt (34) and blown to the outside by the airflow.

5. The split conductor AC composite insulated phase-to-phase spacer according to claim 4, characterized in that, In any double-skirt structure, the outer diameter of the lower skirt (34) at its edge is smaller than the outer diameter of the skirt (32) at its edge.

6. The split conductor AC composite insulated phase-to-phase spacer according to claim 4, characterized in that, The inflation mechanism inside the hollow connecting frame (1) includes a cavity set inside the hollow connecting frame (1). The cavity inside the hollow connecting frame (1) is connected to each ventilation support rod (2). The air outlet of the air pump (13) is connected to the cavity inside the hollow connecting frame (1) through the air supply pipe (14).

7. A split conductor AC composite insulated phase-to-phase spacer according to claim 6, characterized in that, The hollow connecting frame (1) has a central hole (11) at its center position. Arc-shaped sleeves (12) are provided on both sides of the hollow connecting frame (1). The arc-shaped sleeves (12) are used to wrap the air pump (13) installed on the hollow connecting frame (1). An air inlet is provided on the arc-shaped sleeves (12). The arc-shaped sleeves (12) have an arc-shaped protrusion structure. The arc-shaped sleeves (12) and the central hole (11) are used to split the airflow blown to the end face of the hollow connecting frame (1) and reduce the wind resistance of the hollow connecting frame (1).

8. The split conductor AC composite insulated phase-to-phase spacer according to claim 7, characterized in that, The vertical pipe (22) is connected to the hollow connecting frame (1) by a connecting pipe (21), which is an inclined or horizontal hollow pipe.

9. A split conductor AC composite insulated phase-to-phase spacer according to claim 7, characterized in that, The bottom of the clamp connecting seat (23) is provided with a bottom hole (231), and an internal thread is provided in the bottom hole (231). The central vent column (232) is located inside the bottom hole (231), and an external thread is provided at the end of the vertical tube (22). The bottom hole (231) and the end of the vertical tube (22) are connected by threads.

10. A split conductor AC composite insulated phase-to-phase spacer according to claim 7, characterized in that, The chuck (4) is provided with a support column (42) at the bottom. The support column (42) is connected and fixed to the chuck connecting seat (23) by a fixing rod (235). The chuck connecting seat (23) is provided with a horizontally penetrating connecting seat mounting hole (234). The support column (42) is provided with a horizontally penetrating support column mounting hole (421) at the position of the connecting seat mounting hole (234). The fixing rod (235) passes through the connecting seat mounting hole (234) and the support column mounting hole (421) to fix the support column (42) to the chuck connecting seat (23). The inflation channel (43) passes vertically through the support column mounting hole (421), and the fixing rod (235) is provided with an inwardly recessed fixing rod groove (236) in the support column mounting hole (421), so that the upper and lower inflation channels (43) are connected through the fixing rod groove (236).

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