Telescopic insulating support rod based on 10KV overhead line

Abstract

The invention relates to the technical field of high-voltage wire installation and maintenance equipment, in particular to a 10KV overhead line-based telescopic insulating supporting rod, which comprises supporting rods and a plurality of wire clamps, the head parts of the adjacent supporting rods are connected through a fixing block, the end parts of the supporting rods are connected with the wire clamps, and the wire clamps sleeve corresponding three-phase wires. The head of one end of the supporting rod is an outer rod of a hollow structure. The fixing block is provided with a hollow cavity, a power assembly is arranged in the hollow cavity of the fixing block, the power assembly extends into the outer rods on the two sides through a driving shaft, and telescopic assemblies are symmetrically arranged in the outer rods on the two sides; the telescopic assembly comprises a rack and a gear which are in meshing transmission, the end of the driving shaft is provided with a bevel gear pair and is in transmission with the gear through a rotating shaft, and one end of the rack is connected with an inner rod of the supporting rod. The supporting rod provided by the invention can effectively solve the problem that the phase distance of overhead conductors is not easy to control in an existing operation method, and the supporting rod has self-locking and self-locking rechecking functions, so that the safety of equipment is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage line installation and maintenance equipment, and in particular to a telescopic insulating support rod based on a 10KV overhead line. Background Art

[0002] To meet the growing electricity demand of power users, power grid companies are upgrading and renovating power equipment systems and lines with increasing frequency year by year. Among these, 10kV overhead distribution lines represent the largest power supply and distribution lines in the domestic power grid. During maintenance, some circuits are subject to power outages, severely impacting production and daily life. To reduce the frequency and duration of power outages, extensive live-line maintenance and inspections are required. Therefore, safe and reliable live-line working poles suitable for 10kV overhead distribution lines are essential.

[0003] 10kV lines are typically installed in an equilateral triangle arrangement, with a smaller phase spacing, typically 0.8-1.0 meters. This arrangement effectively reduces crossarm length and tower loads, making it suitable for rural areas or areas with complex terrain.

[0004] A Chinese patent document (publication number: CN104617515B) discloses a 10KV distribution line pole-top maintenance support rod. The main body of the support rod is a slender insulating rod with a U-shaped fork plate installed on the upper section. The lower section of the insulating rod is inserted into the sliding sleeve of a fixing clamp. One side of the fixing clamp's sliding sleeve is equipped with a clamping plate and a clamp that can be clamped to the power pole. The other side of the fixing clamp is equipped with a lifter, and the lifting component of the lifter is connected to the lower end of the insulating rod. The beneficial effect is that this device can be fixed to the top of the power pole and the lifter can be operated to support the conductor while performing maintenance work. It can replace human labor. With its simple structure, easy operation, safety and reliability, it is expected to become an essential tool for live maintenance on 10KV distribution line poles.

[0005] Traditional live distribution operations often involve erecting live poles for 10kV overhead lines in a triangular arrangement. The pole is a single insulated pole. During operation, the two phases are spread apart, and the center phase is tied with an insulating rope, which is then pulled apart by ground-based electricians to ensure smooth lowering of the pole. This type of pole requires the cooperation of an electrician inside the workbench to spread the two phases apart, posing a risk of lateral forces on the workbench. Furthermore, due to site constraints, ground-based electricians often find themselves within the pole-falling range when pulling the center phase insulating rope. The center phase conductor is subjected to significant downward force during the pull, posing a risk of insufficient safety distance between uncovered phases. The pole erection and removal process is complex, resulting in low efficiency and a high risk factor.

[0006] The use of the support rod requires cooperation from multiple parties, the operation process is complicated, and the support structure is unstable and prone to sliding and shifting. There is no stop safety device, which poses a great safety hazard. Summary of the Invention

[0007] In response to the shortcomings of the existing technology, the present invention provides a telescopic insulating support rod based on a 10KV overhead line, which does not require a ground electrician to pull down the middle phase. It can effectively solve the problems of the existing operation method such as the difficulty in controlling the phase-to-phase distance of overhead conductors and the lack of special tools, thereby greatly improving the utilization rate of human resources and operation safety. The support rod of the present invention has self-locking and self-locking review functions, which enhances the safety of the equipment.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A telescopic insulating support rod based on a 10KV overhead line comprises two support rods and a plurality of conductor clamps sleeved on a three-phase conductor. The support rods comprise 2 to 3 sections and are telescopically arranged. The heads of adjacent support rods are connected by a fixed block. The ends of the support rods are connected to conductor clamps, which are sleeved on the corresponding three-phase conductors. The head of one end of the support rod is an outer rod with a hollow structure. The fixed block has a hollow cavity. A power assembly is arranged in the hollow cavity of the fixed block. The power assembly extends to the outer rods on both sides through a driving shaft. The outer rods on both sides are symmetrically arranged with telescopic assemblies. The telescopic assembly comprises a meshing transmission rack and a gear. A bevel gear pair is provided at the end of the driving shaft and is transmitted to the gear through a rotating shaft. One end of the rack is connected to the inner rod of the support rod. When the power assembly is started, the support rods on both sides are synchronously driven to extend or retract.

[0010] Preferably, the support rod is divided into two sections, including an outer rod and an inner rod. One end of the inner rod is telescopically installed in the outer rod, the end of the inner rod is connected to the rack, and the other end of the inner rod is connected to the wire clamp, and the wire clamp is provided on the adjacent three-phase wire.

[0011] Preferably, a stop unit is provided on one side of the rack, and the stop unit includes a guide block, a stop rod and a slot opened 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 convex rod is fixed on one end of the guide block close to the rack, and a stop tension spring is connected between the convex rod and the guide rod; a wedge-shaped head is provided on the end of the stop rod close to the rack, and the opening of the slot expands outward to form a bell mouth.

[0012] Preferably, an unlocking unit is provided on one side of the stop rod, and the unlocking unit includes a vertical rod and a rocker rod. The vertical rod is fixedly connected to the inside of the outer rod, and the vertical rod is connected to the rocker rod through a first pin shaft. A limiting groove is provided at one end of the rocker rod close to the stop rod, and a guide rod is provided on the stop rod, and the guide rod is slidably passed through the limiting groove; a lifting unit is provided on the side of the rocker 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, and the 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 rocker arm; an annular area is provided between the inner wall of the linkage sleeve and the outer wall of the rotating shaft, and an 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, and 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 convex block is fixed on the outer peripheral surface of the guide ring, and a guide column is fixed on the convex block. The guide column slides through the arc groove;

[0014] Preferably, two slides are provided in the annular area, the two slides are located on both sides of the convex stop, and the two slides slide toward each other along the circumference between the outer periphery of the guide ring and the inner wall of the linkage sleeve; a guide bar is fixed on the inner wall surface of the linkage sleeve, and the inner wall of the guide bar is slidably arranged with the outer wall of the guide ring, and the two slides are respectively provided with arc springs corresponding to the adjacent sides of the guide bar, and the two ends of the arc spring are respectively fixedly connected to the adjacent sides of the guide bar and the side of the slide.

[0015] Preferably, a lifting ring is sleeved on the outer periphery of the linkage sleeve, a sliding component is arranged inside the lifting ring, an annular groove is provided at the inner bottom of the lifting ring, and the guide column is slidably installed inside the annular groove; wing plates are fixed on both sides of the outer peripheral surface of the lifting ring, the wing plate on one side abuts against the rocker arm and is located below it, and a sliding guide limit pair is provided at the bottom of the wing plate on the other side.

[0016] Preferably, a stop check unit is provided below the stop rod, and the stop check unit includes a knock rod, a lock box and a lock tongue. The knock rod is installed on the vertical rod through a second pin shaft, and a check tension spring is fixed on the knock rod, and the other end of the check tension spring is fixedly connected to the vertical rod; the lock box is located on the side of the knock rod end away from the stop rod, and a lock tongue is slidingly provided inside the lock box, and a reset spring is installed on the end of the lock tongue away from the knock rod; a second wedge is provided on the lock tongue toward the wing plate, and 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 arranged at the output end of the motor, and the worm gear pair or the cylindrical gear pair are both transmission-connected to the driving shaft.

[0018] Preferably, the support rod is divided into three sections, including an inner rod and two outer rods. The two outer rods are telescopically connected to the two ends of the inner rod. The two ends of the inner rod are respectively connected to adjacent racks. The end of the outer rod away from the inner rod is connected to the wire clamp, and the wire clamp is set on the adjacent three-phase wire.

[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 is driven by a single motor to achieve synchronous and proportional distance adjustment of the three-phase conductors, simplifying the complexity of the control system and improving the adjustment accuracy. The equilateral triangle layout design ensures that the distance between the three-phase conductors always remains consistent, avoiding conductor deviation, which further leads to uneven distribution of the electric field between phases and accidents. The core of the invention is to connect two equal-length support rods and maintain an angle of 60 degrees, so that the three wire clamps at the ends of the support rods are at the three vertices of the equilateral triangle, and cooperate with a single motor to operate the synchronous extension and retraction of the two support rods, thereby achieving precise automatic adjustment of the distance between the three-phase conductors. Specifically, the support rod includes an outer rod and an inner rod that are slidably sleeved. The outer rod is a hollow structure. A telescopic assembly is arranged inside the outer rod. The power assembly is installed in the fixed block. The power assembly drives the active shaft to rotate, and transmits power to the gear of the telescopic assembly through the bevel gear pair. The gear is engaged with the rack installed inside the two support rods for transmission; since a fixed angle of degrees is maintained between the support rods 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 vertex positions of an equilateral triangle; when the motor is started, 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 synchronous adjustment of the spacing between the three-phase conductors.

[0021] 2. The stop unit of the present invention is configured as a plug-in stop locking structure, which can firmly lock the length of the support rod at multiple positions to avoid accidental movement under external forces such as strong winds; the motor-driven automatic unlocking unit ensures the sequence and safety of operation, and prevents the rack from being forcibly driven in an incompletely unlocked state to damage the equipment or cause displacement and pose a safety hazard; specifically, the stop rod extends into the corresponding slot on the rack under the action of the stop spring, and this plug-in stop structure ensures that limits are formed in multiple directions, avoids inactive displacement, and ensures the relative distance of the three-phase conductors; when the length of the support rod needs to be adjusted, the motor first drives the rotating shaft to rotate relative to the sleeve shaft and the linkage sleeve, and the rotating shaft drives the guide ring to rotate, and the guide column on the guide ring slides and is arranged Installed in the arc groove, the guide ring moves upward under the guidance of the arc groove, and the up and down movement of the guide ring directly drives the lifting ring to move up and down; the lifting ring is connected with a wing plate, and the wing plate moves up and down with the lifting ring. When the wing plate moves upward, it pushes the rocker bar to rotate around the first pin shaft, and the rocker bar drives the stop rod to move in the direction away from the rack until it disengages from the slot, so that the stop unit releases the telescopic restriction on the support rod; in this process, the guide ring rotates relative to the linkage sleeve, and the cam pushes the slide plate on one side to move in the annular area so that the corresponding arc spring is compressed. When the stop unit is released from the limit, the rotating shaft is transmitted along the circumference through the guide ring, and the cam squeezes the arc spring and pushes the guide bar and the linkage sleeve to rotate together, realizing the rotation of the sleeve shaft, and then completing the next step of telescopic adjustment.

[0022] 3. The stop check unit of the present invention is triggered after the rotating shaft stops rotating. The stop check unit knocks the stop rod through the cooperation of the knock rod and the check spring, preventing 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. This ensures that the stop rod can enter the slot to form a stable limit position, further preventing the support rod from deflecting when not in operation.

[0023] Specifically, when the wing plate moves upward to push the rocker rod to rotate, and the rocker rod drives the stop rod to disengage from the slot to release the limit, the first wedge moves upward with the wing plate to release 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, the knock rod is pushed to rotate around the second pin shaft, so that the other end of the stop rod moves to above the lock tongue and is limited. At this time, the lock tongue forms an energy storage limit on the knock rod;

[0024] Since the sleeve shaft and the linkage sleeve are provided with damping outside, the rotating shaft is set to rotate freely. When 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 resets and pushes the adjacent slide plate to move in the direction of the initial position (i.e., the direction close to the other slide plate). In the process of movement, the slide plate pushes the cam to move circumferentially, and the arc groove drives the guide column and the guide ring to move downward together. The guide column further drives the lifting ring to move downward. In this process, the stop rod is in the stop spring. Under the reset action, it moves toward the direction close to the card slot to limit the position; at the same time, the first wedge at the bottom of the wing plate moves downward to push the second wedge to translate, so that the lock tongue releases the limit on the knock rod, and the knock rod rotates under the reset action of the check tension spring to form a knock on the end of the stop rod, and the knocking generates vibration to make the stop rod that has not fully entered the locked state extend into the card slot; it prevents the wedge-shaped head on the stop rod from being stuck at the opening of the card slot or resting on the wall between adjacent card slots, ensuring that the stop rod can enter the card slot to form a stable limit, and further preventing the support rod from deflecting in the non-operating state. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 2 It is a three-dimensional schematic diagram of the power assembly 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 It is a partial cross-sectional schematic diagram of the stop and check unit of the telescopic support rod of the present invention;

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

[0033] Figure: three-phase conductor 11; outer rod 12; inner rod 13; support rod 14; fixing block 15; reinforcement rod 16; wire clamp 17; motor 18; worm 19; worm gear 20; driving shaft 21; rotating shaft 22; bevel gear pair 23; gear 24; rack 25; sleeve 26; first bearing seat 27; second bearing seat 28; linkage sleeve 29; lifting ring 30; sliding guide limit pair 31; wing plate 32; sliding member 33; arc groove 34; guide post 35 ; Guide rod-36; Slide plate-37; Arc spring-38; Guide strip-39; Guide ring-40; Protrusion-41; Guide groove-42; Rocker arm-43; Limiting groove-44; Guide block-45; Stop rod-46; Stop spring-47; Vertical rod-48; Knock rod-49; Check spring-50; First wedge-51; Lock box-52; Second wedge-53; Lock tongue-54; Return spring-55; Protrusion-56; Guide rod-57; T-slot-58; Wedge head-59; Slot-60; Ring groove-61. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood 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 a plurality of conductor clamps 17 sleeved on a three-phase conductor 11. The support rod 14 includes 2 to 3 sections and is telescopically arranged. The heads of adjacent support rods 14 are connected by a fixed block 15. The ends of the support rods 14 are connected to the conductor clamps 17. The conductor clamps 17 are sleeved on the corresponding three-phase conductors 11. The heads of the support rods 14 are outer rods 12 with a hollow structure; the fixed block 15 has a hollow cavity, and a power assembly is arranged in the hollow cavity of the fixed block. The power assembly extends to the outer rods 12 on both sides through a driving shaft 21, and the telescopic assemblies are symmetrically arranged in the outer rods 12 on both sides; the telescopic assembly includes a rack 25 and a gear 24 with meshing transmission. A bevel gear pair 23 is provided at the end of the driving 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 assembly is started, the support rods 14 on both sides are synchronously driven to extend or retract.

[0038] When the three-phase conductor is an equilateral triangle, two or three support rods 14 may be provided.

[0039] One end of the two support rods 14 is fixedly connected and forms a 60-degree angle. There are three wire clamps 17 set at the ends of the two support rods 14. The three wire clamps 17 are located at the vertices of an equilateral triangle, and the three wire clamps 17 are respectively sleeved on the three-phase conductors. The two support rods are extended or retracted synchronously through adjustment of a power component, so that the three-phase conductors move evenly and synchronously.

[0040] A reinforcement rod 16 is provided between two adjacent outer rods 16 , and the reinforcement rod 16 is made of insulating material.

[0041] The outer rod, inner rod, fixed block, wire clamp, reinforcement rod, gear, rotating shaft, rack, rocker arm, vertical pole, tension spring, spring and other components in this application are all made of non-metallic materials to avoid the formation of concentrated areas of electric fields near the three-phase wires, ensure the insulation strength of the air, and ensure construction safety.

[0042] The spring can be made of glass fiber reinforced epoxy resin composite material, which has an insulating effect. The material has excellent elastic recovery performance, an elastic modulus of up to 20-24GPa, and a tensile strength of more than 500MPa.

[0043] The tension spring can be made of carbon fiber reinforced PEEK (polyetheretherketone) material, which has an insulating effect. This material has mechanical properties similar to those of metal and a tensile strength of up to 230MPa.

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

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

[0046] The rack is suitable for carbon fiber reinforced composite materials or high-strength engineering plastic PEEK (polyetheretherketone), which has excellent dimensional stability and mechanical strength, and provides long-term and 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 has excellent fatigue resistance. The driving shaft can be made of carbon fiber composite pipe, 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 of HV1500 or above) and perfect insulation performance (volume resistivity>10 14 Ω·cm).

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

[0050] The motor in this invention is remotely controlled. The remote control system should utilize wireless communication technology operating at a frequency of 2.4 GHz. The receiver housing should be constructed of carbon fiber-reinforced polyamide with a wall thickness of at least 6 mm, ensuring a dielectric strength of at least 25 kV / mm. Special processing should be used to provide electromagnetic shielding (shielding effectiveness > 60 dB). The receiving antenna should be made of a non-metallic material, such as a glass fiber-reinforced epoxy resin antenna mast with a printed circuit antenna, and housed within 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 utilizes a multi-layer FR-4 epoxy glass cloth laminate coated with conformal paint (moisture-proof, dust-proof, and mildew-proof). All electronic components are spaced at least 5mm apart from the PCB to ensure creepage distances fully meet high-voltage safety requirements. The motor is powered by a rechargeable lithium-ion battery. The battery pack housing is constructed of flame-retardant ABS material (compliant with UL94 V-0 standards) and features triple protection against overcharge, over-discharge, and short-circuit. Electrical isolation from the motor is achieved via a DC-DC isolation converter (voltage rating ≥ 5kV).

[0052] The bearing seats are constructed from phenolic cloth laminate or SMC (sheet molding compound) to provide stable support. The bearings themselves can utilize ceramic ball bearings or nylon self-lubricating bearings to reduce the use of metal. These material choices ensure an ideal balance between electrical insulation and mechanical properties for 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 in the outer rod 12, and the end of the inner rod 13 is detachably connected to the rack 25. The other end of the inner rod 13 is connected to the wire clamp 17, and the wire clamp 17 is sleeved on the adjacent three-phase wire 11.

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

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

[0056] The core of the system is to connect two support rods 14 of equal length and maintain an angle of 60 degrees, so that the three wire clamps 17 at the ends of the support rods are at the three vertices of an equilateral triangle, and cooperate with a single motor 18 to operate the synchronous extension and retraction of the two support rods 14, thereby realizing precise automatic adjustment of the distance between the three-phase conductors 11. Specifically, the motor 18 is installed on the fixed block 15, and is connected to the worm wheel 20 through the worm 19, driving the driving shaft 21 to rotate, and the power is transferred to the gear 24 through the bevel gear pair 23. The gear 24 is engaged with the rack 25 installed inside the two support rods 14 for transmission. When the motor 18 is started, the two support rods 14 extend or shorten synchronously at the same rate; since a fixed angle of 60 degrees is maintained between the support rods 14, 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 vertex positions of an equilateral triangle; when the support rod 14 extends, the side length of the equilateral triangle increases synchronously, and the distance between the wire clamps 17 increases proportionally; when the support rod 14 shortens, 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, and the unlocking unit includes a vertical rod 48 and a rocker rod 43. The vertical rod 48 is fixedly connected to the inside of the outer rod 12, and the vertical rod 48 is connected to the rocker rod 43 through a first pin shaft. A limiting groove 44 is provided on one end of the rocker rod 43 close to the stop rod 46, and a guide rod is provided on the stop rod 46, and the guide rod is slidably passed through the limiting groove 44; a lifting unit is provided on one side of the end of the rocker rod 43 away from the limiting groove 44.

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

[0059] Furthermore, the lifting unit includes a sleeve shaft 26, which is sleeved on the outside of the rotating shaft 22, and the gear 24 is fixed to the outer periphery of the sleeve shaft 26. The sleeve shaft 26 has a linkage sleeve 29, which is located on one side of the gear 24 and is close to the rocker 43. An annular area is provided between the inner wall of the linkage sleeve 29 and the outer wall of the rotating shaft 22. The annular wall of the linkage sleeve 29 is symmetrically provided with a penetrating arc groove 34. 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 convex stopper 41 is fixed on the outer peripheral surface of 40, and a guide column 35 is fixed on the convex stopper 41, and the guide column 35 is slidably inserted into the arc groove 34; two slide plates 37 are provided in the annular area, and the two slide plates 37 slide relatively along the circumferential direction between the outer periphery of the guide ring 40 and the inner wall of the linkage sleeve 29; a guide bar 39 is fixed on the inner wall surface of the linkage sleeve 29, and the inner wall of the guide bar 39 is slidably arranged with the outer wall of the guide ring 40, and the two slide plates 37 are respectively provided with arc springs 38 corresponding to the adjacent side surfaces of the guide bars 39, and the two ends of the arc spring 38 are respectively fixedly connected to the adjacent side surfaces of the guide bar 39 and the side surfaces of the slide plates 37.

[0060] See also Figure 6 and Figure 7 Except for the linkage sleeve 29, the parts of the sleeve 26 that cooperate with the rotating shaft 22 adopt a fitting sliding setting, and there is an annular area with an annular space between the linkage sleeve 29 and the matching section of the rotating shaft 22; the annular area can be: an annular groove is opened on the inner wall of the sleeve 26, or it is formed by reducing the diameter of the outer peripheral 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 to the outer peripheral surface of the rotating shaft 22 . The guide rod 36 passes through the guide groove 42 .

[0062] A first bearing seat 27 is mounted on the exterior of the rotating shaft 22 and fixedly connected to the inner wall of the outer rod 12 via a first support rod. A second bearing seat 28 is mounted on one end of the sleeve shaft 26 and fixedly connected to the inner wall of the outer rod 12 via a second support rod. The other end of the sleeve shaft 26 is mounted on the inner wall of the outer rod 12 via a third bearing seat. A rotating bearing is located at the junction of the rotating shaft 22 and the sleeve shaft 26. It should be noted that the bearing seats are both equipped with bearings and connected to the rotating shaft or sleeve shaft.

[0063] Furthermore, a lifting ring 30 is sleeved on the outer periphery of the linkage sleeve 29, a sliding component 33 is provided inside the lifting ring 30, an annular groove 61 is provided at the bottom inner portion of the lifting ring 30, and the end portion of the guide column 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, the wing plate 32 on one side abuts against the rocker arm 43 and is located below it, and a sliding guide limit pair 31 is provided at the bottom of the wing plate 32 on the other side.

[0064] See also 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 on 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 column 35 and the cam 41 can be connected by a threaded connection, and a through hole is set on the ring groove 61. During the installation process, the guide column 35 passes through the through hole and is screwed to the cam 41, and is fixed with a screwdriver, and the exposed length of the guide column 35 is shortened to avoid interference between the guide column 35 and the lifting ring 30.

[0067] The stop unit of the present invention is configured as a plug-in stop lock structure, which is superior to a one-way limit and can firmly lock the length of the support rod 14 at multiple positions to prevent accidental movement under external forces such as strong winds. The automatic unlocking unit driven by the motor 18 ensures the sequential and safe operation and prevents the rack 25 from being forcibly driven when not fully unlocked, thereby damaging the transmission mechanism.

[0068] Specifically, the stop rod 46 extends into the corresponding slot 60 on the rack 25 under the action of the stop spring 47. This plug-in stop structure ensures that a limit is formed in multiple directions to avoid inactive displacement; when it is necessary to adjust the length of the support rod 14, the motor 18 first drives the rotating shaft 22 to rotate relative to the sleeve shaft 26 and the linkage sleeve 29, and the rotating shaft 22 drives the guide ring 40 to rotate. Since the guide column 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 column 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 lifting ring 30 to move up and down; the lifting ring 30 is connected to the wing The plate 32 and the wing plate 32 move up and down together with the lifting ring 30. When the wing plate 32 moves upward, it pushes the rocker bar 43 to rotate around the first pin shaft, and the rocker bar 43 drives the stop rod 46 to move in the direction away from the rack 25 until it disengages from the slot 60, so that the stop unit releases the telescopic restriction on the support rod; in this process, the guide ring 40 rotates relative to the linkage sleeve 29, and the cam 41 pushes the 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, the rotating shaft 22 is radially transmitted through the guide ring 40. The cam 41 squeezes the arc spring 38 and then pushes the guide bar 39 and the linkage sleeve 29 to rotate together, realizing the rotation of the sleeve shaft 26, and then completes the next step of telescopic adjustment.

[0069] Furthermore, a stop check unit is provided below the stop rod 46, and the stop check unit includes a knock rod 49, a lock box 52 and a lock tongue 54. The knock rod 49 is mounted on the vertical rod 48 through a second pin shaft, and a check tension spring 50 is fixed on the knock rod 49 located on one side of the vertical rod 48 and close to the stop rod 46, and the other end of the check tension spring 50 is fixedly connected to the vertical rod 48; the lock box 52 is located on the side of the end of the knock rod 49 away from the stop rod 46, and the lock box 52 is fixedly connected to the inner wall of the outer rod 12, and a lock tongue 54 is slidingly provided inside the lock box 52, and the lock tongue 54 can abut the end of the knock rod 49, and a return spring 55 is installed on the end of the lock tongue 54 away from the knock rod 49; a second wedge 53 is provided on the lock tongue 54 toward the direction of the wing plate 32, and a first wedge 51 is fixed on the wing plate 32 corresponding to the second wedge 53.

[0070] See also Figure 6 and Figure 7 The second pin is located at an eccentric position of the knock rod 49, and the second pin is eccentrically close to one end of the lock box 52. The knock rod 49, the vertical rod and the second pin form a lever structure. The large stroke rotation of one end of the knock rod 49 close to the stop rod 46 is converted into a small stroke at the other end; the torque is converted according to different proportions.

[0071] The stop check unit of the present invention is triggered after the rotating shaft 22 stops rotating. The stop check unit knocks the stop rod 46 through the cooperation of the knock rod 49 and the check tension spring 50, preventing the wedge-shaped head 59 on the stop rod 46 from being 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, further preventing the support rod from deflecting in the non-operating state;

[0072] Specifically, when the wing plate 32 moves upward to push the rocker rod 43 to rotate, and the rocker rod 43 drives the stop rod 46 to disengage from the locking groove 60 to 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 lock 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, the knock rod 49 is pushed to rotate around the second pin shaft, so that the other end of the stop rod 46 moves to above the lock tongue 54 and is restricted. At this time, the lock tongue 54 forms an energy storage limit on the knock rod 49.

[0073] Since the sleeve 26 and the linkage sleeve 29 are provided with damping outside, the rotating shaft 22 is set to rotate freely. When the motor 18 drives the rotating shaft 22 to rotate and adjust the telescopic distance, the motor 18 stops, and the rotating shaft 22, the sleeve 26 and the linkage sleeve 29 stop rotating in the direction of the motor drive. At this time, the compressed arc spring 38 resets and pushes the adjacent slide 37 to move in the direction of the initial position (i.e., close to the direction of the other slide 37). During the movement of the slide 37, the cam 41 is pushed to move radially, and the arc groove 34 drives the guide column 35 and the guide ring 40 to move downward together. The guide column 35 further drives the lifting ring 30 to move downward. In this process, the stop rod 46 is pulled in the stop position. Under the reset action of the spring 47, it moves toward the direction close to the slot 60 for limiting; 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 lock tongue 54 releases the limit on the knock rod 49, and the knock rod 49 rotates under the reset action of the check tension spring 50 to form a knock on the end of the stop rod 46. The knocking generates vibration, causing the stop rod 46 that has not fully entered the locked state to extend into the slot 60; preventing the wedge head 59 on the stop rod 46 from being 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, further preventing the support rod from deflecting in the non-operating state.

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

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

[0076] It should be noted that, in the present invention, friction damping is provided on the outside of the sleeve 26 and the linkage sleeve 29, and the rotating shaft 22 is provided for free rotation, so as to maintain the resistance difference between the rotating shaft 22 and the linkage sleeve 29, thereby facilitating the relative rotation of the two.

[0077] Dovetail grooves along the axial direction can also be provided on the opposite surfaces of the two slides 37, and a slide rod corresponding to the dovetail groove is provided on the side surface corresponding to the cam 41; when the cam 41 is driven to rotate by the motor 18 and the rotating shaft 22, the cam 41 simultaneously drives the two slides 37 to move, causing the two arc springs 38 to deform; during recovery, the restoring force of the two arc springs 38 ensures that the guide ring 40 and the cam 41 move in opposite directions, with a certain degree of balance and sufficient power.

[0078] Example 2:

[0079] Different from embodiment 1, the support rod 14 can also be set to 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 the adjacent racks 25. The end of the outer rod 12 away from the inner rod is connected to the wire clamp 17, and the wire clamp 17 is sleeved on the adjacent three-phase conductor 11.

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

[0081] The setting of the intersecting fixed end is similar to the mechanism of embodiment 1, while the telescopic component is set inside the outer rod 12 at the free end, and the power is set separately.

[0082] In this embodiment, the functions of Example 1 can be realized by adjusting the telescopic components provided at the two free ends simultaneously. This design can be used as a backup to prevent a single unit from failing and becoming unusable.

[0083] The present invention illustrates the technical concept of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned embodiments. In other words, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that relevant improvements to the present invention fall within the scope of protection and disclosure of the present invention.

Claims

1. A telescopic insulating support rod based on a 10KV overhead line, comprising two support rods (14) and a plurality of conductor clamps (17) sleeved on a three-phase conductor (11), characterized in that: The support rod (14) includes 2 to 3 sections and is telescopically arranged. The heads of adjacent support rods (14) are connected by a fixed block (15). The ends of the support rods (14) are connected with a wire clamp (17). The wire clamp (17) is sleeved on the corresponding three-phase wire (11). The head of one end of the support rod (14) is an outer rod (12) with a hollow structure. The fixed block (15) has a hollow cavity. A power component is arranged in the hollow cavity of the fixed block. The power component extends to the outer rods (12) on both sides through a driving shaft (21). The outer rods (12) on both sides are symmetrically arranged with a telescopic component. The telescopic component includes a rack (25) and a gear (24) that are meshed and driven. A bevel gear pair (23) is arranged at the end of the driving 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, the support rods (14) on both sides are synchronously driven to extend or retract.

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

3. The telescopic insulating support rod based on 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 comprising a guide block (45), a stop rod (46) and a clamping groove (60) provided at the bottom of the rack (25); a T-shaped slot (58) is provided on the guide block (45), the stop rod (46) is slidably installed in the T-shaped slot (58), a guide rod (57) is fixed on the stop rod (46), a convex rod (56) is fixed on one end of the guide block (45) close to the rack (25), and a stop spring (47) is connected between the convex rod (56) and the guide rod (57); a wedge-shaped head (59) is provided at the end of the stop rod (46) close to the rack, and the opening of the clamping groove (60) expands outward to form a bell mouth.

4. The telescopic insulating support rod based on 10KV overhead line according to claim 3, characterized in that: An unlocking unit is provided on one side of the stop rod (46), and the unlocking unit includes a vertical rod (48) and a rocking rod (43). The vertical rod (48) is fixedly connected to the inside of the outer rod (12). The vertical rod (48) is connected to the rocking rod (43) via a first pin shaft. A limiting groove (44) is provided on one end of the rocking rod (43) close to the stop rod (46). A guide rod is provided on the stop rod (46), and the guide rod is slidably inserted into the limiting groove (44). A lifting unit is provided on one side of the end of the rocking rod (43) away from the limiting groove (44).

5. The telescopic insulating support rod based on 10KV overhead line according to claim 4, characterized in that: The lifting unit comprises a sleeve shaft (26), the sleeve shaft (26) is sleeved on the outside of the rotating shaft (22), the gear (24) is fixed to the outer periphery of the sleeve shaft (26), the sleeve shaft (26) has a linkage sleeve (29), the linkage sleeve (29) is located on one side of the gear (24) and close to the rocker (43); an annular area is arranged between the inner wall of the linkage sleeve (29) and the outer wall of the rotating shaft (22), and an 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 arranged between the inner wall of the guide ring (40) and the rotating shaft (22) to realize the upward and downward movement of the guide ring (40), a convex block (41) is fixed on the outer peripheral surface of the guide ring (40), a guide column (35) is fixed on the convex block (41), and the guide column (35) is slidably penetrated in the arc groove (34).

6. The telescopic insulating support rod based on 10KV overhead lines according to claim 5, characterized in that: Two slide plates (37) are arranged in the annular area, and the two slide plates (37) are located on both sides of the convex block (41). The two slide plates (37) slide toward each other along the circumference between the outer periphery of the guide ring (40) and the inner wall of the linkage sleeve (29); a guide bar (39) is fixed on the inner wall surface of the linkage sleeve (29), and the inner wall of the guide bar (39) is slidably arranged with the outer wall of the guide ring (40). The two slide plates (37) are respectively provided with arc springs (38) corresponding to the side surfaces of the adjacent guide bars (39), and the two ends of the arc springs (38) are respectively fixedly connected to the side surfaces of the adjacent guide bars (39) and the side surfaces of the slide plates (37).

7. The telescopic insulating support rod based on 10KV overhead lines according to claim 6, characterized in that: A lifting ring (30) is sleeved on the outer periphery of the linkage sleeve (29), a sliding component (33) is arranged inside the lifting ring (30), an annular groove (61) is provided at the bottom of the lifting ring (30), and the guide column (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), the wing plate (32) on one side abuts against the rocker (43) and is located below it, and a sliding guide limit pair (31) is provided at the bottom of the wing plate (32) on the other side.

8. The telescopic insulating support rod based on 10KV overhead lines according to claim 7, characterized in that: A stop check unit is provided below the stop rod (46), and the stop check unit comprises a knock rod (49), a lock box (52) and a lock tongue (54). The knock rod (49) is mounted on the vertical rod (48) through a second pin shaft, a check spring (50) is fixed on the knock rod (49), and the other end of the check spring (50) is fixedly connected to the vertical rod (48); the lock box (52) is located on one side of the end of the knock rod (49) away from the stop rod (46), a lock tongue (54) is slidably provided inside the lock box (52), and a return spring (55) is installed on the end of the lock tongue (54) away from the knock rod (49); a second wedge (53) is provided on the lock tongue (54) toward the wing plate (32), and a first wedge (51) is fixed on the wing plate (32) corresponding to the second wedge (53).

9. The telescopic insulating support rod based on 10KV overhead lines according to claim 1, characterized in that: The power assembly comprises a motor (18) and a transmission unit, wherein the transmission unit comprises a worm gear pair or a cylindrical gear pair arranged at the output end of the motor (18), and the worm gear pair or the cylindrical gear pair are both transmission-connected to a driving shaft (21).

10. The telescopic insulating support rod based on 10KV overhead lines according to claim 1, characterized in that: The support rod (14) is composed of three sections, including an inner rod (13) and two outer rods (12). The two outer rods (12) are telescopically sleeved on the two 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 rod (12) away from the inner rod are connected to the wire clamp (17). The wire clamp (17) is sleeved on the adjacent three-phase wire (11).

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