A traction device for connecting and docking multiple conductors with different cross-sections on a power transmission line
By designing the prefabricated traction device, the problem of hydraulic traction pipes being unable to be reused is solved, the stability and cost reduction of wire traction is achieved, and the anti-loosening effect is enhanced. It is suitable for the construction of connecting and laying wires with multiple splits in different cross-sections of transmission lines.
Patent Information
- Application Number
- CN202211444844.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-18
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2042-11-18
AI Technical Summary
The existing hydraulic traction pipe cannot be reused after the wire is extended, resulting in the problem of high cost of wire spread.
A prefabricated traction device including an upper connecting sleeve and a lower connecting sleeve is designed. The contact area between the slider and the aluminum stranded wire is expanded, the rotating connector can be flexibly rotated, the top line components are arranged interlaced, and the top wheel structure enhances the anti-loosening effect, ensuring the stability and detachability of the wire during the traction process.
The reuse of the wire traction device is realized, the construction cost is reduced, the stability and anti-loosening effect of the wire is improved, and the twisting and winding of the wire is avoided.
Smart Images
Figure CN116111419B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a construction technology for butting and connecting conductors with different cross-sections in the same wire-laying section during tension stringing construction of an overhead transmission line, and in particular to a butt-jointing and traction device for connecting and connecting conductors with multiple splits and different cross-sections of a transmission line. Background Art
[0002] With the continuous development of the power grid, line access is severely restricted. UHV lines are routed along remote mountainous areas, avoiding towns and cities. Weather conditions are complex, and different sections are designed for different ice thicknesses, requiring different conductor cross-sections. This has led to the emergence of design schemes that utilize multiple conductor cross-sections within the same section, primarily using conductors of the same cross-section. Only heavily iced sections or special sections utilize conductors of different cross-sections. Currently, when laying out conductors for overhead transmission lines, the construction phase involves segmented stringing according to the application areas of the conductors of different cross-sections. Due to the short application areas (specifications require a maximum length of 6-8 kilometers and no more than 20 stringing pulleys for each section), coupled with the difficulty in selecting a tensioning site due to terrain restrictions, stringing construction is inefficient and difficult.
[0003] There are also construction methods for continuously deploying conductors of different cross-sections on site. For example, the utility model patent with publication number CN216958798U discloses a connection device for connecting conductors of different large cross-sections during conductor traction construction. The device comprises a torsion-resistant wire rope, a rotary connector connected to each end, and a traction tube. The rotary connector is a linear structure, rotatably connected to the torsion-resistant wire rope and the traction tube. The two traction tubes are hydraulically connected to the conductors. Because the hydraulic traction tube is a consumable material and cannot be reused, it must be cut and scrapped after the conductor is deployed. This is expensive to use and the cost of conductor deployment is high. Summary of the Invention
[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a traction device for connecting and docking multiple conductors of different cross-sections in a transmission line, so as to solve the problem of high conductor deployment costs caused by the inability to reuse existing hydraulic traction tubes when deploying conductors.
[0005] In order to achieve the above object, the technical solution adopted by the present invention is:
[0006] The top end of the sliding sleeve is provided with a screw thread on the top of the sliding sleeve, and the bottom end of the sliding sleeve is provided with a screw thread on the top of the sliding sleeve.
[0007] As a further preferred embodiment of the present technical solution, the rear side of the hanging ring is a conical structure, which facilitates the traction device to pass through the line-releasing pulley.
[0008] As a further preferred embodiment of the present technical solution, the front of the lower connecting sleeve is provided with an annular top plate, and after the upper connecting sleeve and the lower connecting sleeve are assembled, the front end of the top plate abuts against the rear of the slider to prevent the slider from sliding backward and causing the aluminum stranded wire to loosen.
[0009] As a further optimization of the present technical solution, a sleeve 1 is provided in the middle of the end cover, the inner hole of the sleeve 1 is a funnel-shaped structure, the end of the sleeve 1 is provided with an internal thread, the internal thread of the sleeve 1 is connected with a top screw, the top screw is a hollow structure, the rear end of the top screw is provided with a plurality of partition grooves, the partition grooves divide the rear part of the top screw into a multi-petal structure, after the top screw is screwed into the sleeve 1, the rear end of the top screw is closed toward the middle under the interference of the inner wall of the sleeve 1, the steel core is clamped, and the clamping strength and stability of the traction device on the wire are further ensured.
[0010] As a further preferred embodiment of the present technical solution, a rotary connector is further provided on one side of the hanging ring, and the rotary connector includes a mounting fixture, a rotary joint 1 and a rotary joint 2, the rotary joint 1 and the mounting fixture are fixedly connected by a number of positioning pins, a stepped hole is provided inside the mounting fixture, a rolling bearing is installed at the front end of the rotary joint 2, and the rolling bearing is arranged in the stepped hole, and two sets of wing plates are provided on the outside of the rotary joint 1 and the rotary joint 2, and the ends of the two sets of wing plates are connected by pins; the rotary connector can rotate flexibly and at high speed in the positive and reverse directions under different force conditions under the rated load, and the tensile strength is not lower than the breaking force of the wire, thereby avoiding twisting and entanglement of the wire.
[0011] As a further preferred embodiment of the present technical solution, the pin is externally rotatably connected to a bushing, thereby reducing wear on the wire rope and the pin.
[0012] As a further preference of the present technical solution, several top wire assemblies are provided at the upper and lower parts of the lower connecting sleeve, and the top wire assembly includes a bracket, and the lower part of the bracket is rotatably connected to a top wheel, the top wheel is an eccentric wheel structure, and the small diameter end of the top wheel is against the aluminum stranded wire, an adjusting bolt is provided at the upper part of the bracket, and several screw holes are provided on the side wall of the lower connecting sleeve, and the adjusting bolt screw holes are threadedly connected, and limit baffles are provided on both sides of the bracket, and one end of the limit baffle is fixedly connected to the inner wall of the lower connecting sleeve; after the slider fixes the wire, the adjusting bolt is rotated to make the small diameter end of the top wheel against the aluminum stranded wire, and when the wire slides forward or backward in the traction device, the friction between the wire and the top wheel drives the top wheel to rotate, and the top wheels of the eccentric structure on the upper and lower sides clamp the wire tighter when rotating, thereby preventing the wire from sliding.
[0013] As a further preferred embodiment of the present technical solution, the upper and lower top wire assemblies are arranged in an alternating manner. When the wire slides in the traction device, the top wheel presses the wire tightly to make the wire into a continuously curved wave shape, thereby enhancing the anti-loosening effect of the wire.
[0014] The beneficial effects of the present invention are:
[0015] 1) The present invention adopts an assembled traction device, which can be disassembled and reused after the wire traction is completed, thereby reducing the operating cost of the wire traction.
[0016] 2) The rear side of the hanging ring is a tapered structure, which makes it easier for the traction device to pass through the line-laying pulley.
[0017] 3) An annular top plate is provided at the front of the lower connecting sleeve. After the upper connecting sleeve and the lower connecting sleeve are assembled, the front end of the top plate abuts against the rear of the slider to prevent the slider from sliding backward and causing the aluminum stranded wire to loosen.
[0018] 4) A sleeve 1 is provided in the middle of the end cover. The inner hole of the sleeve 1 is a funnel-shaped structure. The end of the sleeve 1 is provided with an internal thread. The internal thread of the sleeve 1 is connected to a top screw. The rear end of the top screw is provided with a plurality of separation grooves. The separation grooves separate the rear part of the top screw into a multi-petal structure. After the top screw is screwed into the sleeve 1, the rear end of the top screw is closed toward the middle under the interference of the inner wall of the sleeve 1, clamping the steel core, further ensuring the clamping strength and stability of the traction device on the wire.
[0019] 5) A rotary connector is also provided on one side of the hanging ring. Under the rated load, the rotary connector can rotate flexibly and at high speed in the forward and reverse directions under different force conditions. The tensile strength is not lower than the breaking force of the wire, which avoids the twisting and entanglement of the wire.
[0020] 6) The pin is externally rotatably connected to a sleeve, which reduces wear on the wire rope and the pin.
[0021] 7) Several top wire assemblies are provided at the upper and lower parts of the lower connecting sleeve, and the top wire assembly includes a bracket, and the lower part of the bracket is rotatably connected to a top wheel, the top wheel is an eccentric wheel structure, and the small diameter end of the top wheel is against the aluminum stranded wire, and an adjusting bolt is provided on the upper part of the bracket, and the adjusting bolt is threadedly connected to the side wall of the lower connecting sleeve, and limit baffles are provided on both sides of the bracket, and one end of the limit baffle is fixedly connected to the inner wall of the lower connecting sleeve; after the slider fixes the wire, the adjusting bolt is rotated to make the small diameter end of the top wheel against the aluminum stranded wire, and when the wire slides forward or backward in the traction device, the friction between the wire and the top wheel drives the top wheel to rotate, and the top wheels of the eccentric structure on the upper and lower sides clamp the wire tighter when rotating, thereby preventing the wire from sliding.
[0022] 8) The upper and lower top wire assemblies are arranged in a staggered manner. When the wire slides in the traction device, the top wheel presses the wire tightly to make the wire into a continuous curved wave shape, thereby enhancing the anti-loosening effect of the wire. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Attachment Figure 1 The present invention is a schematic structural diagram of a traction device for connecting and docking multiple conductors with different cross-sections in a power transmission line.
[0024] Attachment Figure 2 It is a cross-sectional view of a traction device for connecting and docking multiple conductors with different cross-sections of a power transmission line according to the present invention.
[0025] Attachment Figure 3 The present invention is a schematic diagram of the internal structure of a connecting sleeve on a traction device for connecting and docking multiple conductors of different cross-sections on a power transmission line.
[0026] Attachment Figure 4 The present invention is a schematic diagram of the internal structure of a lower connecting sleeve of a traction device for connecting and docking multiple conductors of different cross-sections in a power transmission line.
[0027] Attachment Figure 5 The present invention is a schematic diagram of the structure of an end cover in a traction device for connecting and docking multiple conductors of different cross-sections in a power transmission line.
[0028] Attachment Figure 6 It is an exploded view of a wire pulling assembly in a traction device for connecting and docking multiple conductors of different cross-sections in a power transmission line according to the present invention.
[0029] Attachment Figure 7 The present invention is a schematic structural diagram of a top wire assembly in a traction device for connecting and docking multiple conductors of different cross-sections in a power transmission line.
[0030] Attachment Figure 8 The present invention is a schematic diagram of the structure of a rotary connector in a traction device for connecting and docking multiple conductors of different cross-sections in a power transmission line.
[0031] Attachment Figure 9It is a cross-sectional view of a rotary connector in a traction device for connecting and docking multiple conductors of different cross-sections in a power transmission line according to the present invention.
[0032] Attachment Figure 10 This is a diagram showing the use status of a traction device for connecting and docking multiple conductors of different cross-sections in a power transmission line according to the present invention.
[0033] In the figure: 1. Upper connecting sleeve; 11. Slide groove; 12. Slider; 13. Stud; 2. Lower connecting sleeve; 21. Top plate; 22. Limit baffle; 23. Screw hole; 3. Top wire assembly; 31. Top wheel; 32. Bracket; 33. Adjusting bolt; 4. End cover; 41. Kidney-shaped groove 1; 42. Sleeve 1; 43. Top screw; 5. Pull wire assembly; 51. Connecting plate; 52. Kidney-shaped groove 2; 53. Screw sleeve; 54. Hanging ring; 6. Rotary connector; 61. Rotary joint 1; 62. Rotary joint 2; 63. Mounting hardware; 64. Rolling bearing; 65. Bushing; 66. Locating pin; 7. Steel wire rope; 8. Aluminum stranded wire; 9. Steel core. DETAILED DESCRIPTION
[0034] The following is combined with Figure 1-10 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0035] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", 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, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure and operation, and therefore cannot be understood as a limitation on the present invention.
[0036] like Figure 1-3 、 Figure 5-6As shown, a transmission line multi-split different cross-section conductor connection and docking traction device includes an upper connecting sleeve 1 and a lower connecting sleeve 2. The front end of the upper connecting sleeve 1 is a conical structure, and a plurality of slide grooves 11 are provided inside the upper connecting sleeve 1. The slide grooves 11 are provided on the inner wall of the conical structure of the upper connecting sleeve 1. A plurality of sliders 12 are slidably connected to the slide grooves 11. The upper end of the slider 12 is an inclined surface, and the inclination is equal to the taper of the upper connecting sleeve 1. The lower end of the slider 12 is an arc surface, which expands the contact area between the slider 12 and the aluminum stranded wire 8; one end of the slider 12 is fixedly connected to a stud 13, and the front end of the upper connecting sleeve 1 is provided with a plurality of slide grooves 11. There is an end cover 4, which is provided with a plurality of waist-shaped grooves 41. The front end of the stud 13 passes through the waist-shaped groove 41 and is threadedly connected to a fastening nut; a pull wire assembly 5 is also provided on one side of the end cover 4, and the pull wire assembly 5 includes a connecting plate 51, which is provided with a plurality of waist-shaped grooves 52. The front end of the stud 13 passes through the waist-shaped groove 52 and is threadedly connected to another set of fastening nuts. A screw sleeve 53 is fixedly connected to one side of the connecting plate 51, and a hanging ring 54 is threadedly connected to one side of the screw sleeve 53; the lower connecting sleeve 2 is threadedly connected to the rear part of the upper connecting sleeve 1, and the tail part of the lower connecting sleeve 2 is a conical structure.
[0037] like Figure 6 As shown, in this embodiment, the rear side of the hanging ring 54 is a tapered structure, which facilitates the traction device to pass through the line-releasing pulley.
[0038] like Figure 2 、 Figure 4 As shown, in this embodiment, an annular top plate 21 is provided at the front of the lower connecting sleeve 2. After the upper connecting sleeve 1 and the lower connecting sleeve 2 are assembled, the front end of the top plate 21 abuts against the rear of the slider 12 to prevent the slider 12 from sliding backward and causing the aluminum stranded wire 8 to loosen.
[0039] like Figure 5 As shown, in this embodiment, a sleeve 42 is provided in the middle of the end cover 4, the inner hole of the sleeve 42 is a funnel-shaped structure, the end of the sleeve 42 is provided with an internal thread, and the internal thread of the sleeve 42 is connected to a top screw 43, and the top screw 43 is a hollow structure. The rear end of the top screw 43 is provided with a plurality of separation grooves, and the separation grooves separate the rear part of the top screw 43 into a multi-petal structure. After the top screw 43 is screwed into the sleeve 42, the rear end of the top screw 43 is closed toward the middle under the interference of the inner wall of the sleeve 42, clamping the steel core 9, further ensuring the clamping strength and stability of the traction device on the wire.
[0040] like Figure 8-9As shown, in this embodiment, a rotary connector 6 is further provided on one side of the hanging ring 54, and the rotary connector 6 includes a mounting fixture 63, a rotary joint 1 61 and a rotary joint 2 62. The rotary joint 1 61 and the mounting fixture 63 are fixedly connected by a number of positioning pins 66. A stepped hole is provided inside the mounting fixture 63, and a rolling bearing 64 is installed at the front end of the rotary joint 2 62. The rolling bearing 64 is arranged in the stepped hole. Two sets of wing plates are provided on the outside of the rotary joint 1 61 and the rotary joint 2 62, and the ends of the two sets of wing plates are connected by pins; the rotary connector 6 can rotate flexibly and at high speed in the positive and reverse directions under different force conditions under the rated load, and the tensile strength is not lower than the breaking force of the wire, thereby avoiding the twisting and entanglement of the wire.
[0041] like Figure 9 As shown, in this embodiment, the pin is externally rotatably connected to a shaft sleeve 65, which reduces the wear of the wire rope 7 and the pin.
[0042] like Figure 2 、 Figure 7 As shown, in this embodiment, several top wire assemblies 3 are provided at the upper and lower parts of the lower connecting sleeve 2, and the top wire assembly 3 includes a bracket 32, and the lower part of the bracket 32 is rotatably connected to the top wheel 31, and the top wheel 31 is an eccentric wheel structure, and the small diameter end of the top wheel 31 is against the aluminum stranded wire 8, and an adjusting bolt 33 is provided on the upper part of the bracket 32, and a plurality of screw holes 23 are provided on the side wall of the lower connecting sleeve 2, and the adjusting bolt 33 screw holes 23 are threadedly connected. Limit baffles 22 are provided on both sides of the bracket 32, and one end of the limit baffle 22 is fixedly connected to the inner wall of the lower connecting sleeve 2; after the slider 12 fixes the wire, the adjusting bolt 33 is rotated to make the small diameter end of the top wheel 31 against the aluminum stranded wire 8. When the wire slides forward or backward in the traction device, the friction between the wire and the top wheel 31 drives the top wheel 31 to rotate, and the top wheels 31 of the eccentric structure on the upper and lower sides clamp the wire tighter when they rotate, thereby preventing the wire from sliding.
[0043] like Figure 2 As shown, in this embodiment, the upper and lower top wire assemblies 3 are arranged alternately. When the wire slides in the traction device, the top wheel 31 presses the wire tightly to make the wire into a continuously curved wave shape, thereby enhancing the anti-loosening effect of the wire.
[0044] like Figure 9As shown, when in use, the steel wire rope 7 is connected to the middle of the rotary connector 6 of the two traction devices, and two steel-core aluminum stranded wires of different diameters are installed inside the traction devices at both ends. Specifically, the lower connecting sleeve 2 is first inserted from the end of the wire, and then the wire is inserted into the upper connecting sleeve 1, so that the front end of the aluminum stranded wire 8 is in front of the slider 12, and then the lower connecting sleeve 2 is screwed into the upper connecting sleeve 1, and the two are connected, so that the top plate 21 pushes the slider 12 forward, and the slider 12 slides forward while approaching the middle of the upper connecting sleeve 1 until the lower end surface of the slider 12 is against the aluminum stranded wire 8, and at the same time, the fastening nut on one side of the end cover 4 is turned, which also It has the effect of moving the slider 12 closer to the middle of the upper connecting sleeve 1. After the aluminum stranded wire 8 is fixed, the top screw 43 is screwed into the side of the end cover 4 to fix the steel core 9, and then the connecting plate 51 is connected to the stud 13, and the hanging ring 54 and the rotary connector 6 are connected in sequence. When the wire is pulled, the hanging ring 54 pulls the stud 13 to move to the front of the upper connecting sleeve 1, so that the clamping force between the slider 12 and the aluminum stranded wire 8 becomes closer and closer, ensuring the stability of the connection between the aluminum stranded wire 8 and the traction device. In addition, the present invention also adopts an assembled traction device, which can be disassembled and reused after the wire traction is completed, reducing the operating cost of wire traction.
[0045] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.
Claims
1. A device for connecting and docking conductors of multiple transmission lines with different cross-sections, comprising an upper connecting sleeve and a lower connecting sleeve, characterized in that: The front end of the upper connecting sleeve is a conical structure, and a plurality of sliding grooves are provided inside the upper connecting sleeve. The sliding grooves are arranged on the inner wall of the conical structure of the upper connecting sleeve, and a plurality of sliders are slidably connected to the sliding grooves. The upper end of the slider is an inclined surface, and the inclination is equal to the taper of the upper connecting sleeve, and the lower end of the slider is an arc surface; a stud is fixedly connected to one end of the slider, and an end cover is provided at the front end of the upper connecting sleeve, and a plurality of waist-shaped grooves 1 are provided on the end cover, and the front end of the stud passes through the waist-shaped groove 1 and is threadedly connected to a fastening nut; a pull wire assembly is also provided on one side of the end cover, and the pull wire assembly includes a connecting plate, and a plurality of waist-shaped grooves 2 are provided on the connecting plate, and the front end of the stud passes through the waist-shaped groove 2 and is threadedly connected to another set of fastening nuts, and the connecting plate One side is fixedly connected with a screw sleeve, and one side of the screw sleeve is threadedly connected to a hanging ring; the lower connecting sleeve is threadedly connected to the rear part of the upper connecting sleeve, and the tail part of the lower connecting sleeve is a conical structure; the front part of the lower connecting sleeve is provided with an annular top plate, and the front end of the top plate is against the rear part of the slider after the upper connecting sleeve and the lower connecting sleeve are assembled; the middle part of the end cover is provided with a sleeve one, the inner hole of the sleeve one is a funnel-shaped structure, the end of the sleeve one is provided with an internal thread, and the internal thread of the sleeve one is connected with a top screw, the top screw is a hollow structure, and the rear end of the top screw is provided with a plurality of separation grooves, which separate the rear part of the top screw into a multi-petal structure. After the top screw is screwed into the sleeve one, the rear end of the top screw is closed towards the middle under the interference of the inner wall of the sleeve one.
2. A device for connecting and traction of multiple split conductors of different cross-sections for a power transmission line according to claim 1, characterized in that: The rear side of the hanging ring is a tapered structure.
3. A device for connecting and traction of multiple split conductors of different cross-sections for a power transmission line according to claim 1, characterized in that: A rotary connector is also provided on one side of the hanging ring, and the rotary connector includes a mounting fixture, a rotary joint 1 and a rotary joint 2. The rotary joint 1 is fixedly connected to the mounting fixture by a number of positioning pins. A stepped hole is provided inside the mounting fixture, and a rolling bearing is installed at the front end of the rotary joint 2. The rolling bearing is arranged in the stepped hole. Two sets of wing plates are provided on the outside of the rotary joint 1 and the rotary joint 2, and the ends of the two sets of wing plates are connected by pins.
4. A device for connecting and traction of multiple split conductors of different cross-sections for power transmission lines according to claim 3, characterized in that: The pin is externally rotatably connected to a shaft sleeve.
5. A device for connecting and traction of multiple split conductors of different cross-sections for a power transmission line according to any one of claims 1 to 4, characterized in that: Several top line assemblies are provided at the upper and lower parts of the lower connecting sleeve, and the top line assembly includes a bracket, and the lower part of the bracket is rotatably connected to the top wheel, the top wheel is an eccentric wheel structure, and the small diameter end of the top wheel is against the aluminum stranded wire, the upper part of the bracket is provided with an adjusting bolt, and the side wall of the lower connecting sleeve is provided with a plurality of screw holes, and the adjusting bolt screw holes are threadedly connected, and limit baffles are provided on both sides of the bracket, and one end of the limit baffle is fixedly connected to the inner wall of the lower connecting sleeve.
6. A device for connecting and traction of multiple split conductors of different cross-sections for a power transmission line according to claim 5, characterized in that: The upper and lower top line components are staggered.