A double-hanging-point structure of ground wire of power transmission line suspension tower

Abstract

This utility model discloses a double-hanging-point structure for the ground wire of a transmission line suspension tower, relating to the field of transmission line technology. It includes a tower fixing frame, with reinforcing angle steel fixedly installed on both sides. An upper hanging point angle steel and a lower hanging point angle steel are fixedly installed at the front ends of the two reinforcing angle steels. Stiffening plates are installed on both the upper and lower hanging point angle steels. A U-shaped clamp is installed between the upper and lower hanging point angle steels, with a hanging point steel plate installed at the front end of the U-shaped clamp. Hanging hole mounting grooves are provided at both the upper and lower ends of the hanging point steel plate. This utility model achieves free longitudinal position adjustment through the interaction of a side sliding head, a smoothing head, a side sliding groove, a smoothing groove, a first screw hole, and a first screw. This allows the stiffening plate to move according to load requirements, adapting to different tension points through sliding, improving local bending strength. It eliminates the need for custom-made stiffening plates of different sizes, thus enhancing versatility.

Description

Technical Field

[0001] This utility model relates to the field of power transmission line technology, specifically a double-suspension point structure for the ground wire of a power transmission line suspension tower. Background Technology

[0002] Suspension towers are the backbone support structure of transmission lines. They suspend conductors and ground wires through crossarms, bearing mechanical loads (wind loads, ice loads) and electrical isolation tasks. The diameter of the ground wire (including OPGW composite ground wire) varies significantly (Φ8–30mm), and it is necessary to have both lightning protection and communication functions. Its suspension points must meet the requirements of high strength, fatigue resistance and multi-specification compatibility.

[0003] Traditional single-point suspension has the risk of single-point failure (such as loose bolts causing the ground wire to fall off), while the double-point suspension structure distributes the load through symmetrical design, improves safety redundancy, and meets the latest power grid independent dual-string standard.

[0004] According to the patent authorization announcement number CN222531298U, a double suspension point structure for the ground wire of a transmission line suspension tower is disclosed. The existing stiffening plate is welded and fixed to the angle steel of the suspension point, which cannot dynamically strengthen the high stress area (such as near the suspension hole), resulting in local deformation or even breakage. In addition, the suspension holes of the suspension point steel plate are fixed in diameter. When changing ground wires of different diameters, the entire steel plate needs to be disassembled, which is difficult to adapt to the suspension needs of ground wires of different specifications. Utility Model Content

[0005] The purpose of this utility model is to provide a double-suspension point structure for the ground wire of a transmission line suspension tower to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A double-hanging-point structure for the ground wire of a transmission line suspension tower includes a tower fixing frame. Reinforcing angle steels are fixedly installed on both sides of the tower fixing frame. An upper hanging point angle steel and a lower hanging point angle steel are fixedly installed at the front ends of the two reinforcing angle steels. Stiffening plates are installed on both the upper and lower hanging point angle steels. A U-shaped clamp is installed between the upper and lower hanging point angle steels. A hanging point steel plate is installed at the front end of the U-shaped clamp. Hanging hole sleeve mounting grooves are opened at both the upper and lower ends of the hanging point steel plate. Replaceable hanging hole sleeves are fitted inside the mounting grooves.

[0007] As a further embodiment of this utility model: the U-shaped clamp is installed between the upper hanging point angle steel and the lower hanging point angle steel by a second hexagonal socket bolt, and the second hexagonal socket bolt passes through the corresponding mounting holes of the U-shaped clamp and the upper and lower hanging point angle steels.

[0008] As a further embodiment of this utility model: the outer wall of the replaceable hanging hole sleeve is provided with an assembly protrusion, and the inner wall of the mounting groove of the hanging hole sleeve is provided with an assembly groove that matches the assembly protrusion. The assembly protrusion and the assembly groove are inserted and cooperated to realize the pre-positioning of the replaceable hanging hole sleeve.

[0009] As a further aspect of this utility model: the replaceable hanging hole sleeve has various specifications, and the inner diameter of the replaceable hanging hole sleeve of different specifications is different, so as to adapt to different specifications of ground wires with a diameter range of Φ8–30mm.

[0010] As a further embodiment of this utility model: the reinforcing angle steel is fixedly connected to the tower fixing frame, the upper hanging point angle steel and the lower hanging point angle steel by means of a first internal hexagonal bolt, and the tower fixing frame, the upper hanging point angle steel and the lower hanging point angle steel are all provided with bolt holes for the first internal hexagonal bolt to pass through.

[0011] As a further embodiment of this utility model: a right-angle groove is provided on the inclined surface of the stiffening plate near both ends, and a first screw is installed in the right-angle groove, and the first screw does not protrude from the inclined surface of the stiffening plate.

[0012] As a further embodiment of this utility model: both the upper hanging point angle steel and the lower hanging point angle steel are provided with first screw holes, and multiple first screw holes are distributed at equal intervals along the length direction of the upper hanging point angle steel and the lower hanging point angle steel, and the first screw is threadedly connected to the first screw hole at the corresponding position.

[0013] As a further embodiment of this utility model: the side of the upper hanging point angle steel and the side of the lower hanging point angle steel are both provided with side sliding grooves, the side sliding grooves extend along the length direction of the upper hanging point angle steel and the lower hanging point angle steel, and the side end of the stiffening plate is equipped with a side sliding head that is slidably connected to the side sliding groove.

[0014] As a further embodiment of this utility model: the bottom surface of the upper hanging point angle steel and the bottom surface of the lower hanging point angle steel are both provided with smooth grooves, the smooth grooves are arranged parallel to the side sliding grooves, and the surface of the stiffening plate is equipped with a smooth head and is slidably connected to the smooth groove.

[0015] As a further embodiment of this utility model: the replaceable hanging sleeve is provided with a second screw hole, and the hanging point steel plate is provided with a second mounting hole coaxial with the second screw hole. The surface of the hanging point steel plate is provided with a second screw. The second screw passes through the second mounting hole of the hanging point steel plate and engages with the second screw hole to fix the replaceable hanging sleeve in the mounting groove of the hanging sleeve.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves free adjustment of longitudinal position through the cooperation of side sliding head, smoothing head, side sliding groove, smoothing groove, first screw hole and first screw, so that the stiffening plate can be moved according to the load requirements. By sliding, it can adapt to different tension points (such as moving the high load area to the vicinity of the replaceable hanging hole sleeve), improve the local bending strength, and eliminate the need to customize stiffening plates of different sizes, making it more versatile.

[0017] 2. This utility model features a replaceable hanging hole sleeve, which is fixed in the mounting groove of the hanging hole sleeve by a second screw. This allows personnel to easily adjust the inner diameter of the replaceable hanging hole sleeve according to the diameter of the ground wire of the suspension tower, making the device adaptable to different specifications of ground wires and thus expanding its application range. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a double-suspension point structure for the ground wire of a transmission line suspension tower.

[0020] Figure 2 This is a partial structural diagram of a double-suspension point structure for the ground wire of a transmission line suspension tower.

[0021] Figure 3 A double-suspension point structure for the ground wire of a transmission line suspension tower. Figure 1 Enlarged view of the structure at point A in the middle.

[0022] Figure 4 This is a schematic diagram of the upper suspension point angle steel structure of a double suspension point structure for the ground wire of a transmission line suspension tower.

[0023] 1. Tower fixing bracket; 2. Upper hanging point angle steel; 3. Lower hanging point angle steel; 4. Reinforcing angle steel; 5. First hex bolt; 6. U-shaped clamp; 7. Second hex bolt; 8. Hanging point steel plate; 9. Replaceable hanging hole sleeve; 10. Stiffening plate; 11. Side sliding head; 12. Smoothing head; 13. Side sliding groove; 14. Smoothing groove; 15. Right angle groove; 16. First screw; 17. First screw hole; 18. Bolt through hole; 19. Second screw; 20. Hanging hole sleeve mounting groove; 21. Second screw hole; 22. Assembly protrusion. Detailed Implementation

[0024] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0025] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a double-suspension point structure for the ground wire of a transmission line suspension tower.

[0026] In existing technologies, suspension towers, as the backbone support structure of transmission lines, need to suspend ground wires of different diameters via crossarms and bear mechanical loads and electrical isolation tasks. Traditional single-point suspension structures have the risk of single-point failure; for example, loose bolts may cause the ground wire to fall off. Although existing double-point suspension technology distributes the load through symmetrical design, the stiffening plate 10 is fixed by welding, which cannot dynamically strengthen high-stress areas, leading to local deformation or breakage. In addition, the hanging holes of the suspension steel plate 8 are of fixed diameter, and replacing ground wires of different diameters requires disassembling the entire steel plate, making it difficult to adapt to various specifications within the Φ8–30mm range.

[0027] To address the aforementioned issues, a dual-hanging-point structure is needed that can both distribute the load and improve safety redundancy, while also flexibly adapting to different grounding wire specifications. Analysis revealed that the key to resolving the technical contradictions lies in the connection stability between the hanging point angle steel and the tower fixing frame 1, the quick replacement capability of the hanging hole sleeves, and the dynamic adjustment function of the stiffening plate 10. Therefore, it is proposed to install reinforcing angle steel 4 on both sides of the tower fixing frame 1, connecting the hanging point angle steel with bolts, and introducing replaceable hanging hole sleeves 9 and sliding stiffening plates 10 to achieve a balance between structural strength and adaptability.

[0028] Therefore, as Figures 1 to 4 As shown, this application proposes a structure including a tower fixing frame 1. Reinforcing angle steels 4 are fixedly installed on both sides of the tower fixing frame 1. Upper hanging point angle steel 2 and lower hanging point angle steel 3 are fixedly installed at the front ends of the two reinforcing angle steels 4. Stiffening plates 10 are installed on both the upper hanging point angle steel 2 and the lower hanging point angle steel 3. U-shaped clamps 6 are installed between the two. Hanging point steel plates 8 are installed at the front ends of the U-shaped clamps 6. Hanging hole sleeve installation grooves 20 are opened at the top and bottom of the hanging point steel plates 8. Replaceable hanging hole sleeves 9 are installed in the grooves.

[0029] Among them, the reinforcing angle steel 4 refers to the angle steel component connected to the tower fixing frame 1 by bolts, specifically using L-shaped cross-section steel, used to enhance the connection stability between the tower fixing frame 1 and the hanging point angle steel. The upper hanging point angle steel 2 and the lower hanging point angle steel 3 refer to the angle steel components respectively fixed to the front end of the reinforcing angle steel 4, which can be connected to the reinforcing angle steel 4 by the first internal hex bolt 5, used to bear the ground wire suspension load. The stiffening plate 10 refers to the reinforcing component installed on the hanging point angle steel, specifically using a steel plate with a right angle groove 15, connected to the hanging point angle steel by the first screw 16, used to disperse local stress.

[0030] Compared to existing technologies, the traditional stiffening plate 10 is welded and fixed, making it unadjustable. In contrast, this solution uses a sliding connection for the stiffening plate 10, allowing its position to be adjusted according to stress distribution, thus preventing localized deformation. Existing hanging holes have fixed diameters and require complete disassembly and replacement. This solution uses replaceable hanging hole sleeves 9, requiring only the sleeve to be replaced to accommodate different grounding wires, significantly improving maintenance efficiency. Furthermore, the connection method between the reinforcing angle steel 4 and the first internal hex bolt 5 of the hanging point angle steel enhances structural stability and reduces the risk of single-point failure.

[0031] Through the above technical solutions, this application achieves distributed bearing of ground wire suspension load, reducing the probability of single-point failure; the replaceable mounting sleeve 9 can quickly adapt to ground wires of different diameters, reducing maintenance downtime; the adjustable design of the stiffening plate 10 can dynamically strengthen high-stress areas and extend the service life of the structure.

[0032] like Figure 1 As shown, this application further proposes that the U-shaped clamp 6 is installed between the upper hanging point angle steel 2 and the lower hanging point angle steel 3 by means of the second internal hex bolt 7, and the second internal hex bolt 7 passes through the corresponding mounting holes of the U-shaped clamp 6 and the upper hanging point angle steel 2 and the lower hanging point angle steel 3.

[0033] The second hexagon socket head cap screw 7 is a fastener with a hexagonal groove, specifically made of high-strength alloy steel. Its threaded portion mates with the internal thread of mounting hole one, and tightening the screw creates a rigid connection between the U-shaped clamp 6 and the angle steel. Mounting hole one refers to a through hole formed on the upper and lower hanging point angle steel 2 and 3, which can be drilled using a CNC machine tool. The hole diameter matches the screw diameter of the second hexagon socket head cap screw 7 to ensure that the bolt maintains axial alignment when passing through, allowing the load to be evenly transmitted along the bolt's axial direction.

[0034] Through the above technical solution, this application effectively solves the problem that traditional welded structures cannot dynamically adapt to the strengthening requirements of high stress areas. The rigid fixing method of the second internal hex bolt 7 connection can reduce the risk of connection loosening due to vibration, and at the same time provide basic conditions for the modular maintenance of the hanging point structure, significantly improving the reliability and maintenance efficiency of the ground wire suspension system.

[0035] like Figure 1 and Figure 3 As shown, this application further proposes that the outer wall of the replaceable hanging hole sleeve 9 is provided with an assembly protrusion 22, and the inner wall of the hanging hole sleeve mounting groove 20 is provided with an assembly groove that matches the assembly protrusion 22. The assembly protrusion 22 and the assembly groove are inserted and engaged to achieve the pre-positioning of the replaceable hanging hole sleeve 9.

[0036] The assembly protrusion 22 refers to a protruding structure on the outer wall of the replaceable hanging sleeve 9. It can be implemented using a trapezoidal or rectangular cross-section protrusion, and its function is to physically limit the movement of the assembly groove, preventing the replaceable hanging sleeve 9 from shifting during installation. The assembly groove refers to a recessed structure on the inner wall of the hanging sleeve mounting groove 20. It can be implemented using a groove whose shape complements that of the assembly protrusion 22. Its function is to provide guiding space for the assembly protrusion 22, allowing the replaceable hanging sleeve 9 to be quickly inserted and maintain its initial position.

[0037] Compared with existing technologies, the existing replaceable mounting sleeve 9 requires manual alignment by the operator during installation. However, this solution uses the insertion and engagement of the mounting protrusion 22 and the mounting groove to enable the replaceable mounting sleeve 9 to be calibrated in the early stage of installation without the need for additional adjustment steps.

[0038] Through the above technical solution, this application can ensure that the replaceable hanging hole sleeve 9 can quickly complete the initial positioning during the installation process, reduce the difficulty of manual operation, and avoid the risk of connection failure between the replaceable hanging hole sleeve 9 and the hanging point steel plate 8 due to positioning deviation, thereby improving the assembly efficiency and reliability of the ground wire suspension structure.

[0039] like Figure 1 and Figure 3 As shown. This application further proposes that the replaceable mounting sleeve 9 exists in various specifications, with different inner diameters for each specification, to accommodate grounding wires with diameters ranging from Φ8 to 30mm.

[0040] The replaceable mounting sleeve 9 is a detachable ring-shaped component, specifically made of high-strength alloy steel, with its inner diameter fitting a clearance with the ground wire diameter. This component is pre-positioned by the insertion of the mounting protrusion 22 into the mounting groove 20, and then secured by the second screw 19, forming a detachable connection structure. The various specifications refer to the serialized configuration of the inner diameter parameters of the replaceable mounting sleeve 9. Specifically, kits with different inner diameters can be manufactured using standardized processing techniques; for example, the inner diameter can be set to stepped specifications such as Φ8mm, Φ12mm, and Φ18mm. This design allows the same mounting point steel plate 8 to be matched with ground wires of different diameters by replacing the replaceable mounting sleeves 9 with different inner diameters. Specifically, the compatibility with different ground wire specifications within the diameter range of Φ8–30mm means that the inner diameter of the replaceable mounting sleeve 9 corresponds to the outer diameter of the ground wire.

[0041] Specifically, when different diameter ground wires need to be installed, the original replaceable hanging hole sleeve 9 is removed from the hanging hole sleeve mounting groove 20 by removing the second screw 19. A new replaceable hanging hole sleeve 9 with an inner diameter matching the target ground wire diameter is selected, and its assembly protrusion 22 is inserted into the assembly groove of the hanging hole sleeve mounting groove 20 to complete the pre-positioning. Then, the second screw 19 is tightened to fix it.

[0042] Through the above technical solution, this application solves the problem that the traditional fixed-diameter hanging point steel plate 8 cannot adapt to multiple specifications of ground wires, and realizes rapid specification switching of ground wire hanging points. The modular replacement method of the replaceable hanging hole sleeve 9 avoids the disassembly of the entire structure, significantly reducing the time cost and operation difficulty of ground wire replacement, while the serialized inner diameter design ensures the suspension stability of ground wires of different diameters.

[0043] like Figure 1 and Figure 4 As shown, this application further proposes that the reinforcing angle steel 4 is fixedly connected to the tower fixing frame 1, the upper hanging point angle steel 2 and the lower hanging point angle steel 3 by the first internal hex bolt 5. The tower fixing frame 1, the upper hanging point angle steel 2 and the lower hanging point angle steel 3 are all provided with bolt holes 18 for the first internal hex bolt 5 to pass through.

[0044] Among them, the reinforcing angle steel 4 refers to the L-shaped steel component used to enhance the connection strength between the tower fixing frame 1 and the hanging point angle steel. Among them, the first internal hex bolt 5 refers to the fastener used to achieve a detachable connection, which can be a carbon steel bolt with a strength grade of 8.8, and the bolt diameter can be, for example, M16 or M20 to adapt to different load requirements.

[0045] Compared to existing technologies, traditional welded connections are prone to stress concentration and weld cracking under alternating loads. This solution, using the first hexagon socket head cap screw 5, eliminates defects in the heat-affected zone of the weld and achieves uniform pressure distribution at the connection interface through adjustable preload. When it is necessary to adjust the hanging point position or replace damaged parts, only the corresponding first hexagon socket head cap screw 5 needs to be removed for modular replacement, avoiding the reduced construction efficiency caused by disassembling the entire structure.

[0046] like Figure 4 As shown, this application further proposes that the inclined surface of the stiffening plate 10 is provided with a right-angle groove 15 near both ends. The groove size of the right-angle groove 15 is adapted to the head size of the first screw 16. The first screw 16 is installed in the right-angle groove 15 and does not protrude from the inclined surface of the stiffening plate 10.

[0047] The right-angle groove 15 refers to a groove provided at both ends of the inclined surface of the stiffening plate 10, with a shape matching the head of the first screw 16. It can be achieved through machining or stamping, and its depth is equal to the height of the head of the first screw 16, ensuring that the first screw 16 is flush with the surface of the stiffening plate 10 after installation. The first screw 16 is a fastener used to fix the stiffening plate 10, and can be a countersunk screw or a flat-head screw, detachably fixing the stiffening plate 10 to the hanging point angle steel through a threaded connection.

[0048] Compared with existing technologies, the existing stiffening plate 10 is fixed by welding, which cannot be adjusted according to actual working conditions, resulting in the inability to specifically strengthen high-stress areas. This solution uses a detachable first screw 16 connected to the right-angle groove 15 in an embedded design, which avoids the material fatigue problem caused by welding, and can achieve dynamic strengthening by adjusting the installation position of the stiffening plate 10, while eliminating the risk of stress concentration caused by the exposed head of the first screw 16.

[0049] like Figure 4 As shown, this application further proposes that both the upper hanging point angle steel 2 and the lower hanging point angle steel 3 are provided with first screw holes 17, and multiple first screw holes 17 are distributed at equal intervals along the length direction of the upper hanging point angle steel 2 and the lower hanging point angle steel 3, and the first screw 16 is threadedly connected to the first screw hole 17 at the corresponding position.

[0050] The first screw hole 17 refers to a threaded hole formed on the surface of the angle steel, which can be achieved by drilling and tapping, and is used to form a threaded connection with the first screw 16. The equal spacing distribution means that the center distance between two adjacent first screw holes 17 is equal, which can be achieved by drilling at fixed intervals during machining, so that the stiffening plate 10 can be installed at different positions according to the actual stress requirements.

[0051] Compared with existing technologies, the existing stiffening plate 10 is fixed by welding, which cannot be adjusted according to actual working conditions, resulting in the stress concentration area not being effectively covered. In contrast, this solution uses a movable stiffening plate 10 in conjunction with the equally spaced first screw holes 17, which can flexibly adapt to different stress distribution states and avoid the risk of local deformation or breakage caused by fixed welding.

[0052] like Figure 1 and Figure 4 As shown, this application further proposes that the side of the upper hanging point angle steel 2 and the side of the lower hanging point angle steel 3 are provided with side sliding grooves 13. The side sliding grooves 13 extend along the length direction of the upper hanging point angle steel 2 and the lower hanging point angle steel 3. The side sliding head 11 is installed on the side end of the stiffening plate 10 and is slidably connected with the side sliding grooves 13.

[0053] The side sliding groove 13 refers to a long, narrow groove structure formed on the side of the angle steel, which can be formed by machining or stamping. Its extension direction is consistent with the length direction of the angle steel, and it guides the stiffening plate 10 to move longitudinally along the angle steel. The side sliding head 11 refers to a protruding component located at the side end of the stiffening plate 10, which can be a welded or bolted metal block. Its shape matches the inner cross-section of the side sliding groove 13, and it achieves sliding limitation by embedding itself into the groove. The sliding connection refers to the movable mechanical fit between the side sliding head 11 and the side sliding groove 13.

[0054] Compared to existing technologies, traditional stiffening plates 10 cannot be adjusted after welding and fixing, resulting in ineffective support for high-stress areas. This solution, however, utilizes the sliding engagement of the side sliding groove 13 and the side sliding head 11 to allow the stiffening plate 10 to move along the length of the angle steel according to actual working conditions, achieving dynamic reinforcement of different areas. This adjustable characteristic not only improves the structure's adaptability to different load distributions but also reduces the risk of deformation caused by localized stress concentration.

[0055] like Figure 1 , Figure 2 and Figure 4 As shown, this application further proposes that the bottom surface of the upper hanging point angle steel 2 and the bottom surface of the lower hanging point angle steel 3 are provided with smooth grooves 14. The smooth grooves 14 are arranged parallel to the side sliding grooves 13. The surface of the stiffening plate 10 is equipped with a smooth head 12 and is slidably connected to the smooth grooves 14.

[0056] The smoothing groove 14 refers to an elongated groove formed on the bottom surface of the angle steel, which can be formed by machining or stamping. Its extension direction is parallel to the side sliding groove 13, and it is used to accommodate the smoothing head 12 and limit its sliding trajectory. The smoothing head 12 refers to a protruding structure fixed to the surface of the stiffening plate 10, which can be installed by welding or bolting. Its shape is adapted to the inner cavity of the smoothing groove 14, and the displacement adjustment of the stiffening plate 10 along the length of the angle steel is realized through sliding fit.

[0057] When it is necessary to adjust the installation position of the stiffening plate 10 on the angle steel, the stiffening plate 10 can be moved synchronously along the side sliding groove 13 and the smooth groove 14, and then fixed after sliding to the target area. This structure allows the support position of the stiffening plate 10 to be dynamically adjusted according to the actual stress distribution requirements, avoiding local deformation caused by stress concentration.

[0058] In some specific embodiments, the cross-sectional shape of the smoothing groove 14 can be rectangular or trapezoidal, the corresponding shape of the smoothing head 12 can be designed as a matching prism structure, and the sliding contact surface can be coated with lubricating material to reduce frictional resistance.

[0059] like Figure 1 and Figure 3As shown, this application further proposes that the replaceable hanging sleeve 9 has a second screw hole 21, and the hanging point steel plate 8 has a second mounting hole coaxial with the second screw hole 21. The second screw 19 passes through the second mounting hole of the hanging point steel plate 8 and is threaded into the second screw hole 21 to fix the replaceable hanging sleeve 9 in the hanging sleeve mounting groove 20.

[0060] The second screw hole 21 refers to a threaded hole formed on the outer wall of the replaceable hanging sleeve 9, which can be achieved by drilling and tapping, and is used to form a threaded connection with the second screw 19. The second mounting hole refers to a through hole on the hanging point steel plate 8 that is coaxial with the second screw hole 21, which can be processed by laser cutting or stamping, and is used to guide the second screw 19 through the hanging point steel plate 8. The second screw 19 is a fastener with external threads, which can be made of stainless steel. By screwing it into the second screw hole 21, an axial clamping force is generated, fixing the replaceable hanging sleeve 9 to the hanging point steel plate 8.

[0061] Specifically, when it is necessary to replace the replaceable hanging sleeve 9 with one of different inner diameters, the second screw 19 is unscrewed out of the second screw hole 21, releasing the axial pressure on the replaceable hanging sleeve 9. At this time, the old replaceable hanging sleeve 9 can be pulled out along the hanging sleeve mounting groove 20. After the new replaceable hanging sleeve 9 is inserted into the hanging sleeve mounting groove 20, the mounting protrusion 22 is inserted into the mounting groove to achieve pre-positioning. The second screw 19 passes through the mounting hole 2 and is screwed into the second screw hole 21. Through the threaded engagement, a clamping force is generated, so that the replaceable hanging sleeve 9 and the hanging point steel plate 8 form a rigid connection.

[0062] Compared with existing technologies, the replaceable hanging sleeve 9 and the hanging point steel plate 8 are fixed by welding or integral molding. Replacement requires cutting or disassembling the hanging point steel plate 8 as a whole, which is complicated and damages the structure. This solution achieves quick installation and removal of the replaceable hanging sleeve 9 by means of the threaded engagement of the second screw 19 and the second screw hole 21, without damaging the structure of the hanging point steel plate 8, while maintaining connection stability.

[0063] The working principle of the double-hanging-point structure for the ground wire of the transmission line suspension tower is as follows: When in use, the stiffening plate 10 is moved according to the load requirements. During adjustment, the first screw 16 is unscrewed first, and then the stiffening plate 10 is pushed. The side sliding head 11 and the smoothing head 12 on the stiffening plate 10 can slide along the side sliding groove 13 and the smoothing groove 14 respectively. When it slides to the appropriate position, the stiffening plate 10 is fixed by the first screw 16. When it is necessary to hang ground wires of different specifications, the second screw 19 is unscrewed first, and then the replaceable hanging hole sleeve 9 is removed and replaced with a new replaceable hanging hole sleeve 9. Then the replaceable hanging hole sleeve 9 is fixed by the second screw 19. Finally, the ground wire of the corresponding specification is passed through the upper and lower replaceable hanging hole sleeves 9 to achieve double hanging of the ground wire.

[0064] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A double-suspension point structure for the ground wire of a transmission line suspension tower, comprising a tower fixing frame (1), characterized in that: The iron tower fixing frame (1) is fixedly installed with reinforcing angle steel (4) on both sides. The front ends of the two reinforcing angle steel (4) are fixedly installed with upper hanging point angle steel (2) and lower hanging point angle steel (3). Stiffening plates (10) are installed on the upper hanging point angle steel (2) and lower hanging point angle steel (3). U-shaped clamps (6) are installed between the upper hanging point angle steel (2) and lower hanging point angle steel (3). Hanging point steel plates (8) are installed at the front end of the U-shaped clamps (6). Hanging hole sleeve installation grooves (20) are opened at both the top and bottom of the hanging point steel plates (8). Replaceable hanging hole sleeves (9) are installed in the inner cavity of the hanging hole sleeve installation grooves (20).

2. The double-suspension point structure for the ground wire of a transmission line suspension tower according to claim 1, characterized in that: The U-shaped clamp (6) is installed between the upper hanging point angle steel (2) and the lower hanging point angle steel (3) by a second internal hex bolt (7). The second internal hex bolt (7) passes through the corresponding mounting holes of the U-shaped clamp (6) and the upper hanging point angle steel (2) and the lower hanging point angle steel (3).

3. The double-suspension point structure for the ground wire of a transmission line suspension tower according to claim 2, characterized in that: The outer wall of the replaceable hanging sleeve (9) is provided with an assembly protrusion (22), and the inner wall of the mounting groove (20) of the hanging sleeve is provided with an assembly groove that matches the assembly protrusion (22). The assembly protrusion (22) and the assembly groove are inserted and engaged to achieve the pre-positioning of the replaceable hanging sleeve (9).

4. The double-suspension point structure for the ground wire of a transmission line suspension tower according to claim 3, characterized in that: The replaceable mounting sleeve (9) comes in a variety of different specifications, and the inner diameter of the replaceable mounting sleeve (9) of different specifications is different, so as to adapt to different specifications of ground wires with a diameter range of Φ8–30mm.

5. The double-suspension point structure for the ground wire of a transmission line suspension tower according to claim 4, characterized in that: The reinforcing angle steel (4) is fixedly connected to the tower fixing frame (1), the upper hanging point angle steel (2) and the lower hanging point angle steel (3) by the first internal hex bolt (5). The tower fixing frame (1), the upper hanging point angle steel (2) and the lower hanging point angle steel (3) are all provided with bolt holes (18) for the first internal hex bolt (5) to pass through.

6. The double-suspension point structure for the ground wire of a transmission line suspension tower according to claim 5, characterized in that: The stiffening plate (10) has right-angle grooves (15) near both ends on its inclined surface. A first screw (16) is installed in the right-angle groove (15), and the first screw (16) does not protrude from the inclined surface of the stiffening plate (10).

7. A double-suspension point structure for the ground wire of a transmission line suspension tower according to claim 6, characterized in that: Both the upper hanging point angle steel (2) and the lower hanging point angle steel (3) are provided with first screw holes (17). Multiple first screw holes (17) are distributed at equal intervals along the length direction of the upper hanging point angle steel (2) and the lower hanging point angle steel (3). The first screw (16) is threadedly connected to the first screw hole (17) at the corresponding position.

8. A double-suspension point structure for the ground wire of a transmission line suspension tower according to claim 7, characterized in that: Side sliding grooves (13) are provided on the side of the upper hanging point angle steel (2) and the side of the lower hanging point angle steel (3). The side sliding grooves (13) extend along the length direction of the upper hanging point angle steel (2) and the lower hanging point angle steel (3). A side sliding head (11) that is slidably connected to the side sliding groove (13) is installed on the side end of the stiffening plate (10).

9. A double-suspension point structure for the ground wire of a transmission line suspension tower according to claim 8, characterized in that: The bottom surface of the upper hanging point angle steel (2) and the bottom surface of the lower hanging point angle steel (3) are provided with smooth grooves (14). The smooth grooves (14) are arranged parallel to the side sliding grooves (13). The surface of the stiffening plate (10) is equipped with a smooth head (12) and is slidably connected to the smooth grooves (14).

10. A double-suspension point structure for the ground wire of a transmission line suspension tower according to claim 9, characterized in that: The replaceable hanging sleeve (9) is provided with a second screw hole (21), and the hanging point steel plate (8) is provided with a second mounting hole coaxial with the second screw hole (21). The surface of the hanging point steel plate (8) is provided with a second screw (19). The second screw (19) passes through the second mounting hole of the hanging point steel plate (8) and engages with the second screw hole (21) to fix the replaceable hanging sleeve (9) in the hanging sleeve mounting groove (20).

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