A kind of based on 10KV overhead line telescopic insulating strut

Abstract

The present application relates to high-voltage line installation and maintenance equipment technical field, specifically to a kind of based on 10KV overhead line telescopic insulating strut, including support pole and multiple wire clamps, adjacent support pole head is connected by fixed block, support pole end is connected with wire clamp, the wire clamp is all set on corresponding three-phase conductor, the head of support pole one end is hollow structure outer pole;The fixed block has hollow cavity, power component is arranged in the hollow cavity of fixed block, the power component is extended to the inner pole of two sides by driving shaft respectively, and the telescopic component is symmetrically arranged in the inner pole of two sides;Telescopic component includes meshing transmission rack and pinion, driving shaft end is provided with bevel gear pair and is driven on pinion by pivot, and one end of rack is connected with the inner pole of support pole;The strut provided by the present application can effectively solve the problem that the distance between overhead conductors is not easy to control in the existing operation method, and the support pole of the present application has self-locking and self-locking review functions, which enhances the safety of the equipment.

Description

Technical Field

[0001] This invention relates to the field of high-voltage line installation and maintenance equipment technology, specifically to a telescopic insulating support rod based on a 10KV overhead line. Background Technology

[0002] To meet the ever-increasing electricity demand from users, power grid companies are increasing the frequency of upgrades and renovations to power equipment systems and lines year by year. Among them, 10kV overhead distribution lines are currently the power supply and distribution lines with the largest coverage in the domestic power grid. During maintenance, some circuits will be shut down, which will seriously affect production and daily life. In order to reduce the frequency and duration of power outages, a large number of live-line maintenance operations are required. Therefore, it is necessary to equip the network with safe and reliable live-line working poles suitable for 10kV overhead distribution lines.

[0003] 10kV lines are typically installed using an equilateral triangular arrangement, with a relatively small phase spacing, commonly 0.8-1.0 meters. This arrangement effectively reduces crossarm length and tower load, making it suitable for rural areas or regions with complex terrain.

[0004] Chinese patent document (publication number: CN104617515B) discloses a maintenance support rod for 10kV power distribution line poles. The main body of the support rod is a slender insulating rod with a U-shaped fork plate on the upper section and the lower part of the insulating rod inserted into a sliding sleeve of a fixing clip. One side of the sliding sleeve of the fixing clip has a clamping plate and a clamping clamp that can be clamped to the pole. The other side of the fixing clip is equipped with a lifting device, and the lifting part of the lifting device is connected to the lower end of the insulating rod. The advantages are: by fixing this device to the upper part of the pole, the conductor can be supported and maintenance work can be carried out simultaneously by operating the lifting device. It can replace manual labor, and its simple structure, convenient operation, safety and reliability make it a promising tool for live-line maintenance on 10kV power distribution line poles.

[0005] Traditional live-line work on 10kV overhead lines often involves erecting poles using a delta configuration. The poles are single insulated rods. During operation, the two outer phases are spread apart, while the middle phase is secured with an insulated rope and pulled apart by a ground electrician to ensure smooth descent. This method requires coordination from an electrician inside the work bucket when spreading the outer phases, posing a risk of lateral stress on the bucket. Furthermore, the operation is limited by space constraints; the ground electrician is often within the pole's lowering range when pulling the middle phase insulated rope, and the middle phase conductor experiences significant downward tension during descent, posing a risk of insufficient safety distance between unshielded phases. The erection and dismantling of the pole are complex, inefficient, and highly dangerous.

[0006] The use of struts requires cooperation from multiple parties, involves complex procedures, and the support structure is unstable, prone to sliding and displacement. There are no stop and safety devices, posing significant safety hazards. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a telescopic insulating support rod based on a 10KV overhead line. This eliminates the need for ground electricians to pull down the middle phase, effectively solving problems such as difficulty in controlling the phase distance of overhead conductors and lack of specialized tools in existing work methods. This significantly improves the utilization rate of human resources and operational safety. The support rod of this invention has self-locking and self-locking verification functions, enhancing the safety of the equipment.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A telescopic insulating support rod based on a 10kV overhead line includes two support rods and multiple conductor clamps sleeved on three-phase conductors. Each support rod comprises two to three sections and is telescopically oriented. The heads of adjacent support rods are connected by a fixing block. Each support rod end is connected to a conductor clamp, which is sleeved on the corresponding three-phase conductor. One end of the support rod is a hollow outer rod. The fixing block has a hollow cavity, and a power assembly is installed inside the hollow cavity. The power assembly extends to the outer rods on both sides via a drive shaft. Telescopic components are symmetrically arranged inside the outer rods on both sides. The telescopic components include a meshing rack and gear. A bevel gear pair is installed at the end of the drive shaft and is driven to the gear via a rotating shaft. One end of the rack is connected to the inner rod of the support rod. When the power assembly is activated, it synchronously drives the support rods on both sides to extend or retract.

[0010] Preferably, the support rod is in two sections, including an outer rod and an inner rod. One end of the inner rod is retractably installed inside the outer rod, and the end of the inner rod is connected to a rack. The other end of the inner rod is connected to a wire clamp, which is sleeved on the adjacent three-phase conductor.

[0011] Preferably, a stop unit is provided on one side of the rack. The stop unit includes a guide block, a stop rod, and a slot at the bottom of the rack. A T-slot is provided on the guide block, and the stop rod is slidably installed in the T-slot. A guide rod is fixed on the stop rod. A protrusion is fixed on one end of the guide block near the rack, and a stop spring is connected between the protrusion and the guide rod. A wedge head is provided on the end of the stop rod near the rack, and the opening of the slot expands outward to form a flared mouth.

[0012] Preferably, an unlocking unit is provided on one side of the stop rod. The unlocking unit includes a vertical rod and a swing rod. The vertical rod is fixedly connected to the inside of the outer rod. The swing rod is connected to the vertical rod through a first pin. A limiting groove is provided at the end of the swing rod near the stop rod. A guide rod is provided on the stop rod and slides through the limiting groove. A lifting unit is provided on the side of the swing rod end away from the limiting groove.

[0013] Preferably, the lifting unit includes a sleeve shaft, which is sleeved on the outside of the rotating shaft. A gear is fixed to the outer periphery of the sleeve shaft. The sleeve shaft has a linkage sleeve, which is located on one side of the gear and close to the swing arm. An annular area is provided between the inner wall of the linkage sleeve and the outer wall of the rotating shaft. A through arc-shaped groove is symmetrically opened on the annular wall of the linkage sleeve. A guide ring is sleeved on the rotating shaft located in the annular area. A sliding rod groove component is provided between the inner wall of the guide ring and the rotating shaft to realize the up and down movement of the guide ring. A protrusion is fixed on the outer peripheral surface of the guide ring, and a guide post is fixed on the protrusion. The guide post slides through the arc-shaped groove.

[0014] Preferably, two sliding plates are provided in the annular area, located on both sides of the protrusion, and the two sliding plates slide in opposite directions along the circumference between the outer circumference of the guide ring and the inner wall of the linkage sleeve; a guide strip is fixed on the surface of the inner wall of the linkage sleeve, and the inner wall of the guide strip is slidably disposed with the outer wall of the guide ring; an arc spring is provided on each of the two sliding plates corresponding to the adjacent side of the guide strip, and the two ends of the arc spring are fixedly connected to the adjacent side of the guide strip and the side of the sliding plate, respectively.

[0015] Preferably, a lifting ring is fitted around the outer periphery of the linkage sleeve, a sliding component is provided inside the lifting ring, and an annular groove is opened at the bottom of the lifting ring. The guide post is slidably installed inside the annular groove. Wing plates are fixed on both sides of the outer peripheral surface of the lifting ring. One wing plate abuts against the swing rod and is located below it, and a sliding guide limit pair is provided at the bottom of the other wing plate.

[0016] Preferably, a stop verification unit is provided below the stop rod. The stop verification unit includes a knocking rod, a lock box, and a lock tongue. The knocking rod is mounted on the upright through a second pin. A verification tension spring is fixed on the knocking rod, and the other end of the verification tension spring is fixedly connected to the upright. The lock box is located on the side of the knocking rod end away from the stop rod. A lock tongue is slidably arranged inside the lock box. A return spring is installed on the end of the lock tongue away from the knocking rod. A second wedge is arranged in the direction of the lock tongue toward the wing plate. A first wedge is fixed on the wing plate corresponding to the second wedge.

[0017] Preferably, the power assembly includes a motor and a transmission unit. The transmission unit includes a worm gear pair or a cylindrical gear pair disposed at the output end of the motor, and the worm gear pair or the cylindrical gear pair is driven to the drive shaft.

[0018] Preferably, the support rod is in three sections, including an inner rod and two outer rods. The two outer rods are telescopically sleeved on both ends of the inner rod. The ends of the inner rod are respectively connected to adjacent racks. The ends of the outer rods away from the inner rod are connected to wire clamps, which are sleeved on adjacent three-phase conductors.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The telescopic insulating support rod of the present invention achieves synchronous and proportional distance adjustment of three-phase conductors through a single motor drive, which simplifies the complexity of the control system and improves the adjustment accuracy. The equilateral triangle layout design ensures that the distance between the three-phase conductors remains consistent, avoiding conductor offset and preventing accidents caused by uneven distribution of electric field between phases. Its core lies in setting two support rods of equal length connected at an angle of 60 degrees, so that the three conductor clamps at the ends of the support rods are located at the three vertices of the equilateral triangle. With the synchronous extension and retraction of the two support rods operated by a single motor, the precise automatic adjustment of the distance between the three-phase conductors is achieved. Specifically, the support rod includes a slidingly fitted outer rod and an inner rod. The outer rod has a hollow structure and a telescopic component is installed inside it. The power component is installed inside the fixed block. The power component drives the drive shaft to rotate and transmits power to the gear of the telescopic component through a bevel gear pair. The gear meshes with the rack installed inside the two support rods. Since the support rods maintain a fixed included angle and the two support rods are of equal length, the three wire clamps at the ends of the support rods always remain at the three vertices of an equilateral triangle. When the motor starts, the two support rods extend or shorten synchronously at the same rate, the side length of the equilateral triangle increases or decreases synchronously, and the distance between the wire clamps changes proportionally, thereby realizing the synchronous adjustment of the spacing between the three-phase wires.

[0021] 2. The stop unit of this invention is set as a plug-in stop locking structure, which can firmly lock the length of the support rod in multiple positions to prevent accidental movement under the action of external forces such as strong winds; the motor-driven automatic unlocking unit ensures the sequence and safety of operation, preventing the rack from being forcibly driven in an incompletely unlocked state, which could damage the equipment or cause deviation and safety hazards; specifically, the stop rod extends into the corresponding slot on the rack under the action of the stop spring. This plug-in stop structure ensures that it forms a limit in multiple directions, preventing non-active displacement and ensuring the relative distance of the three-phase conductors; when it is necessary to adjust the length of the support rod, the motor first drives the rotating shaft to rotate relative to the sleeve shaft and the linkage sleeve. The rotating shaft drives the guide ring to rotate. Due to the sliding of the guide post on the guide ring, the guide ring is fixed in place. Installed in an arc-shaped groove, the guide ring moves upward under the guidance of the arc-shaped groove. The up-and-down movement of the guide ring directly drives the lifting ring to move up and down. The lifting ring is connected to a wing plate, which moves up and down together with the lifting ring. When the wing plate moves upward, it pushes the swing rod to rotate around the first pin shaft. The swing rod drives the stop rod to move away from the rack until it disengages from the slot, thus releasing the stop unit from restricting the extension and retraction of the support rod. During this process, the guide ring rotates relative to the linkage sleeve. The convex stop pushes the slide plate on one side to move in the annular area, compressing the corresponding arc spring. When the stop unit is released from its limit, the rotating shaft is driven along the circumference through the guide ring. After the convex stop squeezes the arc spring, it pushes the guide bar and the linkage sleeve to rotate together, realizing the rotation of the sleeve shaft, and then proceeding to complete the next step of extension and retraction adjustment.

[0022] 3. The stop verification unit of the present invention is triggered after the rotating shaft stops rotating. The stop verification unit strikes the stop rod through the cooperation of the knocking rod and the verification tension spring, so as to prevent the wedge head on the stop rod from getting stuck at the opening of the slot or resting on the wall between adjacent slots, ensuring that the stop rod can enter the slot to form a stable limit, and further preventing the support rod from shifting in the non-operating state.

[0023] Specifically, when the wing plate moves upward and pushes the swing rod to rotate, and the swing rod drives the stop rod to disengage from the slot and release the limit, the first wedge moves upward with the wing plate and releases the limit on the second wedge, causing the lock tongue to extend out of the lock box under the action of the return spring. At the same time, during the downward movement of the stop rod, it pushes the knocking rod to rotate around the second pin, so that the other end of the stop rod travels to the top of the lock tongue and is limited. At this time, the lock tongue forms an energy storage limit on the knocking rod.

[0024] Because the sleeve shaft and linkage sleeve are externally damped, the rotating shaft is set to rotate freely. After the motor drives the rotating shaft to rotate and adjust the telescopic distance, the motor stops, and the rotating shaft, sleeve shaft, and linkage sleeve stop rotating in the direction driven by the motor. At this time, the compressed arc spring returns to its original position and pushes the adjacent slide plate to move towards its initial position (i.e., towards the other slide plate). During the movement of the slide plate, it pushes the convex stop to move circumferentially, and the arc groove drives the guide post and guide ring to move downward together. The guide post further drives the lifting ring to move downward. During this process, the stop rod is stopped by the stop spring. Under the reset action, the device moves towards the slot to limit the movement; simultaneously, the first wedge at the bottom of the wing plate moves downward, pushing the second wedge to translate, causing the locking tongue to release the limit on the knocking rod. Under the reset action of the resetting spring, the knocking rod rotates, striking the end of the stop rod. The striking creates vibration, causing the stop rod, which is not fully locked, to extend into the slot. This prevents the wedge-shaped head on the stop rod from getting stuck at the opening of the slot or resting on the wall between adjacent slots, ensuring that the stop rod can enter the slot to form a stable limit, and further preventing the support rod from shifting when not in operation. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the overall installation structure of the telescopic support rod of the present invention;

[0026] Figure 2 This is a three-dimensional schematic diagram of the power component structure of the telescopic support rod of the present invention;

[0027] Figure 3 This is a three-dimensional schematic diagram of the internal structure of the outer rod of the telescopic support rod of the present invention;

[0028] Figure 4 This is a schematic diagram of the disassembled structure of the linkage sleeve and lifting ring of the telescopic support rod of the present invention;

[0029] Figure 5This is a schematic diagram of the internal disassembled structure of the linkage sleeve of the telescopic support rod of the present invention;

[0030] Figure 6 This is a three-dimensional schematic diagram of the installation structure of the unlocking unit of the telescopic support rod of the present invention;

[0031] Figure 7 This is a cross-sectional schematic diagram of the stop verification unit of the telescopic support rod of the present invention;

[0032] Figure 8 This is a three-dimensional schematic diagram of the disassembled stop unit structure of the telescopic support rod of the present invention;

[0033] In the diagram: Three-phase conductor - 11; Outer rod - 12; Inner rod - 13; Support rod - 14; Fixing block - 15; Reinforcing rod - 16; Wire clamp - 17; Motor - 18; Worm gear - 19; Worm wheel - 20; Drive shaft - 21; Rotating shaft - 22; Bevel gear pair - 23; Gear - 24; Rack - 25; Sleeve shaft - 26; First bearing seat - 27; Second bearing seat - 28; Linkage sleeve - 29; Lifting ring - 30; Sliding guide limit pair - 31; Wing plate - 32; Sliding component - 33; Arc groove - 34; Guide column - 35 ; Guide rod-36; Slide plate-37; Arc spring-38; Guide bar-39; Guide ring-40; Protruding stop-41; Guide groove-42; Swing rod-43; Limiting groove-44; Guide block-45; Stop rod-46; Stop tension spring-47; Upright rod-48; Knocking rod-49; Check tension spring-50; First wedge-51; Lock box-52; Second wedge-53; Lock tongue-54; Return spring-55; Protruding rod-56; Guide rod-57; T-slot-58; Wedge head-59; Slot-60; Ring groove-61. Detailed Implementation

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[0035] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Example 1:

[0037] A telescopic insulating support rod based on a 10KV overhead line includes two support rods 14 and multiple conductor clamps 17 sleeved on three-phase conductors 11. Each support rod 14 has two to three sections and is telescopically configurable. The heads of adjacent support rods 14 are connected by a fixing block 15. Each end of the support rod 14 is connected to a conductor clamp 17, which is sleeved on the corresponding three-phase conductor 11. The head of each support rod 14 is a hollow outer rod 12. The fixing block 15 has a hollow cavity, and a power assembly is installed inside the hollow cavity. The power assembly extends to the outer rods 12 on both sides via a drive shaft 21. Telescopic components are symmetrically installed inside the outer rods 12 on both sides. The telescopic components include a rack 25 and a gear 24 for meshing transmission. A bevel gear pair 23 is installed at the end of the drive shaft 21 and is transmitted to the gear 24 via a rotating shaft 22. One end of the rack 25 is connected to the inner rod 13 of the support rod 14. When the power assembly is activated, it synchronously drives the support rods 14 on both sides to extend or retract.

[0038] In the case where the three-phase conductors are in an equilateral triangle, two or three support rods 14 can be installed.

[0039] Two support rods 14 are fixedly connected at one end and form a 60-degree angle. There are a total of three wire clamps 17 at the ends of the two support rods 14. The three wire clamps 17 are located at the vertices of an equilateral triangle and are respectively fitted onto the three-phase conductors. The synchronous extension or retraction of the two support rods is achieved by adjusting the power component, so that the three-phase conductors move uniformly and synchronously.

[0040] Among them, a reinforcing rod 16 is provided between two adjacent outer rods 16, and the reinforcing rod 16 is made of insulating material.

[0041] The outer rod, inner rod, fixing block, wire clamp, reinforcing rod, gear, shaft, rack, swing rod, upright, tension spring, and spring components in this application are all made of non-metallic materials to avoid the formation of concentrated electric field areas near the three-phase conductors, ensure the air insulation strength, and guarantee construction safety.

[0042] Springs can be made of glass fiber reinforced epoxy resin composite material, which has an insulating effect. This material has excellent elastic recovery properties, with an elastic modulus of 20-24 GPa and a tensile strength of over 500 MPa.

[0043] For tension springs, carbon fiber reinforced PEEK (polyether ether ketone) material can be selected. It has an insulating effect and has mechanical properties similar to metals, with a tensile strength of up to 230 MPa.

[0044] Gears can be made of glass fiber reinforced nylon 66 or POM (polyoxymethylene) material. These materials have excellent mechanical strength, self-lubricating properties and wear resistance, and can withstand contact stress of up to 80MPa while maintaining an insulation strength of over 20kV.

[0045] The shaft can be made of epoxy fiberglass or G11 grade epoxy laminate material. The bending strength along the fiber direction of such materials can reach more than 400MPa, and the insulation breakdown strength exceeds 15kV / mm, which can meet the torque requirements in the transmission process.

[0046] Racks are suitable for use with carbon fiber reinforced composite materials or high-strength engineering plastic PEEK (polyether ether ketone), which have excellent dimensional stability and mechanical strength, and provide long-term reliable meshing transmission while ensuring insulation performance;

[0047] Considering the complex stress state of bevel gear pairs, reinforced PEEK material with a glass fiber content of more than 30% can be selected. This material not only has extremely high mechanical strength (tensile strength >130MPa) but also excellent fatigue resistance. The drive shaft can be made of carbon fiber composite tubing, which has high axial strength and light weight.

[0048] Linear bearings can be made of silicon nitride (Si3N4) ceramic material, which has excellent wear resistance (hardness exceeding HV1500) and perfect insulation properties (volume resistivity >10). 14 Ω·cm).

[0049] Ball bearings can be constructed entirely of ceramic, with inner and outer rings made of zirconium oxide (ZrO2) ceramic and balls made of silicon nitride. This combination leverages the high strength of zirconium oxide (flexural strength >900MPa) and the low friction properties of silicon nitride to create an ideal insulated bearing system.

[0050] The motor in this invention is remotely controlled. The remote control system should employ wireless communication technology with an operating frequency of 2.4 GHz. The receiver shell is made of carbon fiber reinforced polyamide material with a wall thickness of not less than 6 mm, ensuring an insulation strength of 25 kV / mm or higher. It should also undergo special processing to achieve electromagnetic shielding performance (shielding effectiveness > 60 dB). The receiving antenna must be made of non-metallic material, such as a glass fiber reinforced epoxy resin antenna mast with a printed circuit antenna, and placed inside an insulating epoxy resin protective cover, maintaining a safe distance of at least 200 mm from the motor body.

[0051] The signal processing circuit board uses a multi-layer FR-4 epoxy resin glass cloth laminate with a three-proof coating (moisture-proof, dust-proof, and mildew-proof). The distance between all electronic components and the PCB should be no less than 5mm to ensure that the creepage distance fully meets the high-voltage safety requirements. The motor power supply uses a rechargeable lithium-ion battery. The battery pack casing uses flame-retardant ABS material (compliant with UL94 V-0 standard) and is equipped with overcharge, over-discharge, and short-circuit protection circuits. Electrical isolation between the battery pack and the motor is achieved through a DC-DC isolation converter (withstand voltage rating ≥5kV).

[0052] The bearing housing should be made of phenolic laminate or SMC (sheet molding compound) material to provide stable support; the bearing itself can be a ceramic ball bearing or a nylon self-lubricating bearing, reducing the use of metal materials. These material choices ensure an ideal balance between electrical insulation and mechanical performance of the entire transmission system, while also considering weather resistance and long-term stability, ensuring safe and reliable operation in a 10kV high-voltage environment.

[0053] Furthermore, the support rod 14 is divided into two sections, including an outer rod 12 and an inner rod 13. One end of the inner rod 13 is telescopically installed inside the outer rod 12. The end of the inner rod 13 is detachably connected to a rack 25. The other end of the inner rod 13 is connected to a wire clamp 17, which is sleeved on the adjacent three-phase wire 11.

[0054] Furthermore, a stop unit is provided on one side of the rack 25. The stop unit includes a guide block 45, a stop rod 46, and a slot 60 opened at the bottom of the rack 25. The slots 60 are arranged linearly and continuously arranged along the moving direction of the rack 25. The guide block 45 is fixed inside the outer rod 12. A T-slot 58 is opened on the guide block 45. The stop rod 46 is slidably installed in the T-slot 58. A guide rod 57 is fixed on the stop rod 46. The guide rod 57 passes through the T-slot 58 and extends to the outside of the guide block. A protrusion 56 is fixed at one end of the guide block 45 near the rack 25. A stop spring 47 is connected between the protrusion 56 and the guide rod 57. A wedge head 59 is provided at the end of the stop rod 46 near the rack. The opening of the slot 60 expands outward to form a flared mouth.

[0055] See Figure 1 and Figure 8 The telescopic insulating support rod of the present invention is driven by a single motor 18 to realize synchronous and proportional distance adjustment of the three-phase conductors 11, which simplifies the complexity of the control system and improves the reliability. The equilateral triangle layout design ensures that the distance between the three-phase conductors 11 is always consistent, avoiding the problem of uneven distribution of electric field between phases.

[0056] Its core lies in setting two support rods 14 of equal length connected and maintaining an included angle of 60 degrees, so that the three wire clamps 17 at the ends of the support rods are located at the three vertices of an equilateral triangle. With the cooperation of a single motor 18 to operate the synchronous extension and retraction of the two support rods 14, the precise automatic adjustment of the distance between the three-phase wires 11 can be achieved. Specifically, the motor 18 is mounted on the fixed block 15 and is connected to the worm gear 20 via the worm 19, driving the drive shaft 21 to rotate. The power is then transmitted to the gear 24 via the bevel gear pair 23. The gear 24 meshes with the rack 25 installed inside the two support rods 14. When the motor 18 starts, the two support rods 14 extend or shorten synchronously at the same rate. Since the support rods 14 maintain a fixed angle of 60 degrees and the two support rods 14 are of equal length, the three wire clamps 17 at the ends of the support rods 14 always remain at the three vertices of the equilateral triangle. When the support rods 14 extend, the side length of the equilateral triangle increases synchronously, and the distance between the wire clamps 17 increases proportionally. When the support rods 14 shorten, the side length of the equilateral triangle decreases synchronously, and the distance between the wire clamps 17 decreases proportionally.

[0057] Furthermore, an unlocking unit is provided on one side of the stop rod 46. The unlocking unit includes a vertical rod 48 and a swing rod 43. The vertical rod 48 is fixedly connected to the inside of the outer rod 12. The swing rod 43 is connected to the vertical rod 48 through a first pin. A limiting groove 44 is provided at the end of the swing rod 43 near the stop rod 46. A guide rod is provided on the stop rod 46 and slides through the limiting groove 44. A lifting unit is provided on the side of the end of the swing rod 43 away from the limiting groove 44.

[0058] See Figure 6 The first pin on the swing arm 43 is located off-center, and the distance between one end of the stop rod 46 and the first pin is greater than that between the other end; according to the lever principle, the torque of the swing arm 43 on both sides of the first pin is distributed in a certain proportion.

[0059] Furthermore, the lifting unit includes a sleeve 26, which is sleeved on the outside of the rotating shaft 22. A gear 24 is fixed to the outer periphery of the sleeve 26. The sleeve 26 has a linkage sleeve 29, which is located on one side of the gear 24 and close to the rocker arm 43. An annular area is provided between the inner wall of the linkage sleeve 29 and the outer wall of the rotating shaft 22. Symmetrically through arc-shaped grooves 34 are provided on the annular wall of the linkage sleeve 29. A guide ring 40 is sleeved on the rotating shaft 22 located in the annular area. A sliding rod groove component is provided between the inner wall of the guide ring 40 and the rotating shaft 22 to realize the up and down movement of the guide ring 40. A protrusion 41 is fixed on the outer peripheral surface of the guide ring 40, and a guide post 35 is fixed on the protrusion 41. The guide post 35 slides through the arc groove 34. Two sliding plates 37 are arranged in the annular area. The two sliding plates 37 slide relative to each other in the circumferential direction between the outer periphery of the guide ring 40 and the inner wall of the linkage sleeve 29. A guide strip 39 is fixed on the inner wall surface of the linkage sleeve 29. The inner wall of the guide strip 39 slides against the outer wall of the guide ring 40. Arc springs 38 are respectively arranged on the side of the two sliding plates 37 corresponding to the adjacent side of the guide strip 39. The two ends of the arc springs 38 are respectively fixedly connected to the side of the adjacent guide strip 39 and the side of the sliding plate 37.

[0060] See Figure 6 and Figure 7 Except for the linkage sleeve 29, the parts of the sleeve 26 that mate with the rotating shaft 22 are fitted and slidably arranged. There is an annular area between the mating section of the linkage sleeve 29 and the rotating shaft 22. The annular area can be formed by opening an annular groove on the inner wall of the sleeve 26 or by reducing the diameter on the outer circumferential surface of the rotating shaft 22.

[0061] The sliding rod groove component includes a guide groove 42 formed on the inner wall of the guide ring 40 and a guide rod 36 fixed on the outer peripheral surface of the rotating shaft 22, with the guide rod 36 passing through the inside of the guide groove 42.

[0062] A first bearing seat 27 is provided on the outside of the rotating shaft 22, and the first bearing seat 27 is fixedly connected to the inner wall of the outer rod 12 through a first support rod; a second bearing seat 28 is provided at one end of the sleeve shaft 26, and the second bearing seat 28 is fixedly connected to the inner wall of the outer rod 12 through a second support rod; the other end of the sleeve shaft 26 is installed on the inner wall of the outer rod 12 through a third bearing seat; a rotating bearing is provided at the connection between the bottom end of the rotating shaft 22 and the sleeve shaft 26. It should be noted that bearings are provided in all bearing seats and connected to the rotating shaft or sleeve shaft.

[0063] Furthermore, a lifting ring 30 is fitted around the outer periphery of the linkage sleeve 29, a sliding component 33 is provided inside the lifting ring 30, and an annular groove 61 is opened at the bottom of the lifting ring 30. The end of the guide post 35 is slidably installed inside the annular groove 61. Wing plates 32 are fixed on both sides of the outer peripheral surface of the lifting ring 30. One wing plate 32 abuts against the swing rod 43 and is located below it, and a sliding guide limit pair 31 is provided at the bottom of the other wing plate 32.

[0064] See Figure 6 The sliding guide limit pair 31 can be a dovetail guide rail, so that the lifting ring 30 can reciprocate in the axial direction of the linkage sleeve 29.

[0065] The sliding component 33 can be a linear sliding bearing or a ball sleeve bearing, which facilitates the smooth movement of the lifting ring 30 around the outer periphery of the linkage sleeve 29 and avoids jamming when the lifting ring 30 is driven by the single point support of the guide column 35.

[0066] The guide post 35 and the protrusion 41 can be connected by a thread. A through hole is provided in the annular groove 61. During the installation process, the guide post 35 passes through the through hole and is screwed onto the protrusion 41. The protrusion 41 is then screwed on and fixed with a screwdriver. The exposed length of the guide post 35 is kept short to avoid interference between the guide post 35 and the lifting ring 30.

[0067] The stop unit of the present invention is set as a plug-in stop locking structure, which is superior to unidirectional limiting and can firmly lock the length of the support rod 14 in multiple positions to prevent accidental movement under the action of external forces such as strong winds; the automatic unlocking unit driven by the motor 18 ensures the sequence and safety of operation and prevents the rack 25 from being forcibly driven in an incompletely unlocked state and damaging the transmission mechanism.

[0068] Specifically, the stop rod 46, under the action of the stop spring 47, extends into the corresponding slot 60 on the rack 25. This plug-in stop structure ensures limiting in multiple directions, preventing unintentional displacement. When the length of the support rod 14 needs to be adjusted, the motor 18 first drives the rotating shaft 22 to rotate relative to the sleeve shaft 26 and the linkage sleeve 29. The rotating shaft 22 drives the guide ring 40 to rotate. Since the guide post 35 on the guide ring 40 is slidably installed in the arc groove 34, the guide ring 40 moves upward under the guidance of the arc groove 34. Since the end of the guide post 35 is installed in the ring groove 61 of the lifting ring 30, the up and down movement of the guide ring 40 directly drives the up and down movement of the lifting ring 30. The lifting ring 30 is connected to a wing. Plate 32 and wing plate 32 move up and down together with lifting ring 30. When wing plate 32 moves up, it pushes swing rod 43 to rotate around the first pin shaft. Swing rod 43 drives stop rod 46 to move away from rack 25 until it disengages from slot 60, so that the stop unit releases the extension and retraction restriction on support rod. During this process, guide ring 40 rotates relative to linkage sleeve 29. Protrusion 41 pushes slide plate 37 on one side to move in the annular area, so that the corresponding arc spring 38 is compressed. When the stop unit is released from the limit, rotating shaft 22 is radially transmitted through guide ring 40. After protrusion 41 squeezes arc spring 38, it pushes guide bar 39 and linkage sleeve 29 to rotate together, realizing the rotation of sleeve shaft 26, and then completing the next extension and retraction adjustment.

[0069] Furthermore, a stop verification unit is provided below the stop rod 46. The stop verification unit includes a knocking rod 49, a lock box 52, and a locking tongue 54. The knocking rod 49 is mounted on the upright rod 48 via a second pin. A verification tension spring 50 is fixed on the knocking rod 49 located on one side of the upright rod 48 and close to the stop rod 46. The other end of the verification tension spring 50 is fixedly connected to the upright rod 48. The lock box 52 is located on the side of the knocking rod 49 away from the stop rod 46. The lock box 52 is fixedly connected to the inner wall of the outer rod 12. The locking tongue 54 is slidably provided inside the lock box 52. The locking tongue 54 can abut against the end of the knocking rod 49. A return spring 55 is installed on the end of the locking tongue 54 away from the knocking rod 49. A second wedge 53 is provided on the locking tongue 54 facing the wing plate 32. A first wedge 51 is fixed on the wing plate 32 corresponding to the second wedge 53.

[0070] See Figure 6 and Figure 7 The second pin is located at the eccentric position of the knocking rod 49, and the second pin is eccentrically close to one end of the lock box 52. The knocking rod 49, the upright rod, and the second pin form a lever structure. The large stroke rotation of the knocking rod 49 near the stop rod 46 is converted into a small stroke at the other end, so that the torque can be converted in different proportions.

[0071] The stop verification unit of the present invention is triggered after the rotating shaft 22 stops rotating. The stop verification unit strikes the stop rod 46 through the cooperation of the knocking rod 49 and the verification tension spring 50, so as to prevent the wedge head 59 on the stop rod 46 from getting stuck at the opening of the slot 60 or resting on the wall between adjacent slots 60, ensuring that the stop rod 46 can enter the slot 60 to form a stable limit, and further preventing the support rod from shifting in the non-operational state.

[0072] Specifically, when the wing plate 32 moves upward and pushes the swing rod 43 to rotate, and the swing rod 43 drives the stop rod 46 to disengage from the slot 60 and release the limit, the first wedge 51 moves upward with the wing plate 32 to release the limit on the second wedge 53, causing the locking tongue 54 to extend out of the lock box 52 under the action of the return spring 55. At the same time, during the downward movement of the stop rod 46, it pushes the knocking rod 49 to rotate around the second pin, so that the other end of the stop rod 46 travels to the top of the locking tongue 54 and is limited. At this time, the locking tongue 54 forms an energy storage limit on the knocking rod 49.

[0073] Because the sleeve 26 and the linkage sleeve 29 are externally damped, the rotating shaft 22 is set to rotate freely. After the motor 18 drives the rotating shaft 22 to rotate and adjust the telescopic distance, the motor 18 stops, and the rotating shaft 22, sleeve 26, and linkage sleeve 29 stop rotating in the direction driven by the motor. At this time, the compressed arc spring 38 resets and pushes the adjacent slide plate 37 to move towards the initial position (i.e., towards the other slide plate 37). During the movement, the slide plate 37 pushes the convex stop 41 to move radially, and the arc groove 34 drives the guide post 35 and the guide ring 40 to move downward together. The guide post 35 further drives the lifting ring 30 to move downward. During this process, the stop rod 46 stops the pull. Under the reset action of the spring 47, the spring moves towards the slot 60 to limit the movement; at the same time, the first wedge 51 at the bottom of the wing plate 32 moves downward to push the second wedge 53 to translate, so that the locking tongue 54 releases the limit of the knocking rod 49. Under the reset action of the resetting spring 50, the knocking rod 49 rotates to knock on the end of the stop rod 46. The knocking generates vibration, causing the stop rod 46, which is not fully locked, to extend into the slot 60. This prevents the wedge head 59 on the stop rod 46 from getting stuck at the opening of the slot 60 or resting on the wall between adjacent slots 60, ensuring that the stop rod 46 can enter the slot 60 to form a stable limit, and further preventing the support rod from shifting when not in operation.

[0074] Furthermore, the power assembly includes a motor 18 and a transmission unit. The transmission unit includes a worm gear pair or a cylindrical gear pair disposed at the output end of the motor 18, and the worm gear pair or the cylindrical gear pair is connected to the drive shaft 21.

[0075] See Figure 2 The worm gear pair includes a worm 19 and a worm wheel 20. The worm wheel 20 is mounted on the drive shaft 21. The worm 19 is mounted on the output end of the motor 18, and the worm 19 is connected to the worm wheel 20 in a driving connection.

[0076] It should be noted that in this invention, friction damping is provided on the outside of the sleeve shaft 26 and the linkage sleeve 29, and the rotating shaft 22 is set to rotate freely, so as to maintain the resistance difference between the rotating shaft 22 and the linkage sleeve 29, which is conducive to the relative rotation of the two.

[0077] Dovetail grooves along the axial direction can also be provided on the opposite surfaces of the two sliding plates 37, and a sliding rod corresponding to the dovetail groove is provided on the side of the protrusion 41. When the protrusion 41 is driven to rotate by the motor 18 and the rotating shaft 22, the protrusion 41 simultaneously drives the two sliding plates 37 to move, causing the two arc springs 38 to deform. When returning to normal, the reset force of the two arc springs 38 ensures that the guide ring 40 and the protrusion 41 move in opposite directions, with a certain degree of balance and sufficient power.

[0078] Example 2:

[0079] Unlike embodiment 1, the support rod 14 can also be configured as three sections, including an inner rod 13 and two outer rods 12. The two outer rods 12 are telescopically sleeved on both ends of the inner rod 13. The two ends of the inner rod 13 are respectively connected to adjacent racks 25. The ends of the outer rods 12 away from the inner rod are connected to wire clamps 17. The wire clamps 17 are sleeved on adjacent three-phase wires 11.

[0080] In this embodiment, one end of the two support rods 14 intersects and is fixed, while the other end is a free end;

[0081] The fixed end is similar to the mechanism in Embodiment 1, while the free end of the outer rod 12 is equipped with a telescopic component, and the power is set separately.

[0082] In this embodiment, the simultaneous adjustment of the telescopic components set at the two free ends can achieve the function in Embodiment 1. This design can be used as a backup in case a single unit fails and cannot be used.

[0083] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that all related improvements to the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A telescopic insulating support rod based on a 10KV overhead line, comprising two support rods (14) and multiple conductor clamps (17) sleeved on a three-phase conductor (11), characterized in that, The support rod (14) comprises 2 to 3 sections and is telescopic. The heads of adjacent support rods (14) are connected by a fixing block (15). Each end of the support rod (14) is connected to a wire clamp (17), which is sleeved on the corresponding three-phase wire (11). One end of the support rod (14) is a hollow outer rod (12). The fixing block (15) has a hollow cavity. A power component is installed in the hollow cavity of the fixing block. The power component extends to the outer rods (12) on both sides through the drive shaft (21). Telescopic components are symmetrically installed in the outer rods (12) on both sides. The telescopic component includes a rack (25) and a gear (24) for meshing transmission. A bevel gear pair (23) is installed at the end of the drive shaft (21) and is transmitted to the gear (24) through a rotating shaft (22). One end of the rack (25) is connected to the inner rod (13) of the support rod (14). When the power component is started, it synchronously drives the support rods (14) on both sides to extend or retract.

2. The telescopic insulating strut based on a 10KV overhead line as described in claim 1, characterized in that, The support rod (14) consists of two sections, including an outer rod (12) and an inner rod (13). One end of the inner rod (13) is telescopically installed inside the outer rod (12). The end of the inner rod (13) is connected to a rack (25), and the other end of the inner rod (13) is connected to a wire clamp (17). The wire clamp (17) is sleeved on the adjacent three-phase conductor (11).

3. The telescopic insulating strut based on a 10KV overhead line according to claim 2, characterized in that, A stop unit is provided on one side of the rack (25). The stop unit includes a guide block (45), a stop rod (46), and a slot (60) opened at the bottom of the rack (25). A T-slot (58) is opened on the guide block (45). The stop rod (46) is slidably installed in the T-slot (58). A guide rod (57) is fixed on the stop rod (46). A protrusion (56) is fixed at one end of the guide block (45) near the rack (25). A stop spring (47) is connected between the protrusion (56) and the guide rod (57). A wedge head (59) is provided at the end of the stop rod (46) near the rack. The opening of the slot (60) expands outward to form a flared mouth.

4. The telescopic insulating strut based on a 10KV overhead line according to claim 3, characterized in that, An unlocking unit is provided on one side of the stop rod (46). The unlocking unit includes a vertical rod (48) and a swing rod (43). The vertical rod (48) is fixedly connected to the inside of the outer rod (12). The swing rod (43) is connected to the vertical rod (48) through a first pin. A limiting groove (44) is provided at one end of the swing rod (43) near the stop rod (46). A guide rod is provided on the stop rod (46). The guide rod slides through the limiting groove (44). A lifting unit is provided on one side of the end of the swing rod (43) away from the limiting groove (44).

5. The telescopic insulating strut based on a 10KV overhead line according to claim 4, characterized in that, The lifting unit includes a sleeve (26), which is sleeved on the outside of the rotating shaft (22). A gear (24) is fixed on the outer periphery of the sleeve (26). The sleeve (26) has a linkage sleeve (29), which is located on one side of the gear (24) and close to the swing rod (43). An annular area is provided between the inner wall of the linkage sleeve (29) and the outer wall of the rotating shaft (22). A through arc groove (34) is symmetrically opened on the annular wall of the linkage sleeve (29). A guide ring (40) is sleeved on the rotating shaft (22) located in the annular area. A sliding rod groove component is provided between the inner wall of the guide ring (40) and the rotating shaft (22) to realize the up and down movement of the guide ring (40). A protrusion (41) is fixed on the outer peripheral surface of the guide ring (40). A guide post (35) is fixed on the protrusion (41). The guide post (35) slides through the arc groove (34).

6. The telescopic insulating strut based on a 10KV overhead line according to claim 5, characterized in that, Two sliding plates (37) are provided in the annular area. The two sliding plates (37) are located on both sides of the protrusion (41). The two sliding plates (37) slide in opposite directions along the circumference between the outer circumference of the guide ring (40) and the inner wall of the linkage sleeve (29). A guide strip (39) is fixed on the inner wall surface of the linkage sleeve (29). The inner wall of the guide strip (39) slides against the outer wall of the guide ring (40). The two sliding plates (37) are respectively provided with arc springs (38) corresponding to the side of the adjacent guide strip (39). The two ends of the arc springs (38) are respectively fixedly connected to the side of the adjacent guide strip (39) and the side of the sliding plate (37).

7. The telescopic insulating strut based on a 10KV overhead line according to claim 6, characterized in that, A lifting ring (30) is fitted around the outer periphery of the linkage sleeve (29). A sliding component (33) is provided inside the lifting ring (30). An annular groove (61) is opened at the bottom of the lifting ring (30). The guide post (35) is slidably installed inside the annular groove (61). Wing plates (32) are fixed on both sides of the outer peripheral surface of the lifting ring (30). One wing plate (32) abuts against the swing rod (43) and is located below it. A sliding guide limit pair (31) is provided at the bottom of the other wing plate (32).

8. The telescopic insulating strut based on a 10KV overhead line according to claim 7, characterized in that, A stop verification unit is provided below the stop rod (46). The stop verification unit includes a knocking rod (49), a lock box (52), and a lock tongue (54). The knocking rod (49) is mounted on the upright rod (48) through a second pin. A verification tension spring (50) is fixed on the knocking rod (49), and the other end of the verification tension spring (50) is fixedly connected to the upright rod (48). The lock box (52) is located on the side of the knocking rod (49) away from the stop rod (46). The lock tongue (54) is slidably provided inside the lock box (52). A return spring (55) is installed on the end of the lock tongue (54) away from the knocking rod (49). A second wedge (53) is provided on the lock tongue (54) facing the wing plate (32). A first wedge (51) is fixed on the wing plate (32) corresponding to the second wedge (53).

9. The telescopic insulating strut based on a 10KV overhead line according to claim 1, characterized in that, The power assembly includes a motor (18) and a transmission unit. The transmission unit includes a worm gear pair or a cylindrical gear pair disposed at the output end of the motor (18). The worm gear pair or the cylindrical gear pair is connected to the drive shaft (21).

10. The telescopic insulating strut based on a 10KV overhead line according to claim 1, characterized in that, The support rod (14) consists of three sections, including an inner rod (13) and two outer rods (12). The two outer rods (12) are telescopically sleeved on both ends of the inner rod (13). The ends of the inner rod (13) are respectively connected to adjacent racks (25). The ends of the outer rods (12) away from the inner rod are connected to wire clamps (17). The wire clamps (17) are sleeved on adjacent three-phase conductors (11).

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