A combined power line cross arm

Abstract

The present application relates to the technical fields of power line cable fixing device, in particular to a combined power line cross arm, which comprises two groups of arc-shaped clamping rings for clamping wire poles, the outer side of the arc-shaped clamping ring is fixed with a horizontally arranged support seat, a plurality of groups of installation grooves are formed in the upper part of the support seat, and a mounting seat is detachably assembled above the installation grooves; a first arc-shaped slot is formed in the inside of the mounting seat, a first arc-shaped limiting plate is assembled in the first arc-shaped slot, and a fixing seat is integrally connected to one side of the mounting seat; through the self-adaptive temperature sensing design of the heat-shrinkable transmission assembly, the clamping force is automatically adjusted with the change of the environmental temperature, the clamping force is reduced at high temperature to avoid the damage of the cable insulation layer, and the clamping force is increased at low temperature to prevent the loosening of the cable, effectively solving the technical problems of the clamping gap or excessive extrusion of the traditional cross arm caused by the temperature change, significantly improving the operation stability and safety of the line in the seasonal temperature difference environment, and without manual adjustment.

Description

Technical Field

[0001] This invention relates to the field of power line cable fixing devices, specifically to a combined power line crossarm. Background Technology

[0002] During the erection of power transmission lines, various clamps are typically used in conjunction with crossarms to install and secure cables. Currently used traditional cable clamping structures are simple in design and have limited applicability, failing to simultaneously meet the clamping and securing needs of cables with various diameters. In actual assembly operations, when using smaller clamps to hold thicker diameter cables, the overall clamping contact area is too small, resulting in weak clamping and limiting effects, making the cable prone to displacement and loosening. Conversely, when using larger clamps to hold thinner diameter cables, the ample clamping space can easily cause compression and damage to the cable's outer insulation layer, affecting the safety of the line operation. Meanwhile, traditional clamping components are fixed assembly structures that cannot automatically adjust the clamping tightness according to the cable's own condition. In daily outdoor use, the cable will undergo thermal expansion and contraction deformation due to the alternating hot and cold environment, causing gaps in the original clamping position, further reducing the overall fixation stability and easily leading to adverse conditions such as line layout deviation. The overall practical performance is poor and it is difficult to meet the requirements of long-term stable deployment of power lines. Therefore, a combined power line crossarm is proposed to effectively improve the cable clamping adaptability and fixation firmness, ensuring the stable and reliable operation of transmission lines. Summary of the Invention

[0003] To address the problems in the existing technology, the present invention provides a combined power line crossarm that effectively improves the adaptability and fixing firmness of cable clamps, ensuring the stable and reliable operation of transmission lines.

[0004] The technical solution adopted by this invention to solve its technical problem is a combined power line crossarm, including two sets of arc-shaped retaining rings for clamping the power pole. A horizontally arranged support base is fixed on the outside of the arc-shaped retaining rings. Several sets of mounting slots are opened on the upper part of the support base. A mounting base is detachably assembled on the upper part of the mounting slot. A first arc-shaped slot is opened inside the mounting base. A first arc-shaped limiting plate is assembled in the first arc-shaped slot. A fixed base is integrally connected to one side of the mounting base. A second arc-shaped slot is opened at the bottom of the fixed base. A second arc-shaped limiting plate is arranged in the second arc-shaped slot. The mounting base and the fixed base are provided with a connected mounting channel. The mounting channel is equipped with a heat-shrinkable transmission component. The side of the support base is detachably installed with an adjustment seat corresponding to the fixed base. When the first arc-shaped limiting plate is pressed and moves upward, it drives the second arc-shaped limiting plate to move downward to clamp the cable through the heat-shrinkable transmission component. The heat-shrinkable transmission component adaptively adjusts the clamping force of the first arc-shaped limiting plate and the second arc-shaped limiting plate according to changes in ambient temperature.

[0005] Specifically, the heat-shrinkable transmission assembly includes a first adjusting rod slidably disposed in the mounting groove and a first extrusion rod vertically fixed to the upper part of the first arc-shaped limiting plate. The first extrusion rod passes upward through the mounting base and is slidably connected to the mounting base. The upper end of the first extrusion rod is provided with a first guide surface. One end of the first adjusting rod is fixed with a first adjusting block. The first adjusting block is provided with a second guide surface that cooperates with the first guide surface. Several vertical second extrusion rods are fixed on the upper surface of the second arc-shaped limiting plate. The second extrusion rods pass upward through the fixed seat and slide with the fixed seat. Several sets of extrusion springs are connected between the second arc-shaped limiting plate and the inner wall of the second arc-shaped slot. The mounting groove in the fixed seat is provided with a second adjusting rod. A second adjusting block is fixed to one end of the second adjusting rod. A third guide surface is provided on the second adjusting block. A fourth guide surface that mates with the third guide surface is provided on one side of the second extrusion rod. A heat shrinkable component is connected between the first adjusting rod and the second adjusting rod. The end of the second adjusting rod away from the heat shrinkable component is connected to a hydraulic pressure supply structure.

[0006] Specifically, the heat shrinkable component includes a piston cylinder fixedly installed in the mounting channel, with a first piston plate and a second piston plate slidably connected inside the piston cylinder; the ends of a first adjusting rod and a second adjusting rod pass through the piston cylinder and are fixedly connected to the first piston plate and the second piston plate, respectively; and a temperature-sensitive reverse expansion fluid is filled between the first piston plate and the second piston plate.

[0007] Specifically, the hydraulic pressure supply structure includes a hydraulic housing fixedly installed in the mounting groove of the fixed seat, and a sealing slide plate is slidably connected inside the hydraulic housing; the end of the second adjusting rod away from the piston cylinder passes through the hydraulic housing and is fixedly connected to the sealing slide plate; a top pressure spring is fixedly connected between the sealing slide plate and the inner wall of the hydraulic housing.

[0008] Specifically, the inner side of the arc-shaped retaining ring is provided with several arc-shaped mounting grooves, and a hydraulic expansion pad is provided in the arc-shaped mounting grooves; the outer side of the arc-shaped retaining ring is provided with a liquid inlet connector that communicates with the hydraulic expansion pad; the outer side of the fixed seat is provided with a liquid outlet connector that communicates with the hydraulic housing, and the liquid outlet connector is connected to the liquid inlet connector through a pipeline.

[0009] Specifically, bolt mounting holes are provided on the side of the two sets of arc-shaped retaining rings that are close to each other. The adjacent arc-shaped retaining rings are locked together by several sets of bolts passing through the bolt mounting holes.

[0010] Specifically, both the upper surface of the support base and the upper surface of the adjustment base are provided with arc-shaped clamping grooves, which correspond vertically to the first arc-shaped groove and the second arc-shaped groove, respectively.

[0011] Specifically, both the first and second arc-shaped limiting plates have anti-slip buffer pads on their inner sides.

[0012] The beneficial effects of this invention are: (1) The combined power line crossarm of the present invention realizes automatic adjustment of clamping force with changes in ambient temperature through the adaptive temperature sensing design of heat shrinkable transmission components. The clamping force is reduced at high temperature to avoid damage to the cable insulation layer, and the clamping force is increased at low temperature to prevent the cable from loosening. It effectively solves the technical problem of excessive clamping gap or squeezing caused by temperature changes in traditional crossarms, significantly improves the operational stability and safety of the line in the four seasons temperature difference environment, and does not require manual adjustment.

[0013] (2) The combined power line crossarm of the present invention, through the clamping structure of the first arc-shaped limiting plate and the second arc-shaped limiting plate linked together, and with the detachable adjusting seat, can adapt to cables of different diameters. It can adapt to cables of various diameters without changing different specifications of clamps, which solves the problems of narrow application range and insufficient clamping area of ​​traditional devices, and significantly improves the versatility and adaptability of the power crossarm. In addition, when installing thicker cables, the first arc-shaped limiting plate can move upward to drive the second arc-shaped limiting plate downward, which, together with the adjusting seat, greatly increases the wrapping area, evenly disperses the clamping stress, avoids stress concentration and cable damage, and improves the versatility and clamping safety of the crossarm.

[0014] (3) The combined power line crossarm of the present invention achieves synchronous enhancement of cable clamping and pole clamping force through the cooperation of heat shrinkable transmission components, hydraulic pressure supply structure and hydraulic expansion pad in arc-shaped clasp. The wire diameter and load automatically enhance the clamping force of the arc-shaped clasp on the pole. The larger the load, the stronger the clamping force, effectively improving the crossarm's anti-slip, anti-torsion and anti-wind vibration capabilities, and avoiding loosening and failure during long-term operation. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is an isometric view of the present invention; Figure 2 This is an isometric view of the present invention without the adjustment seat installed; Figure 3 This is a cross-sectional view of the support base portion of the present invention; Figure 4 for Figure 3 Enlarged view of region A; Figure 5 This is a schematic diagram of the lower structure of the mounting base and fixing base of the present invention; Figure 6 This is a schematic diagram of the connection structure between the first adjusting rod and the second adjusting rod of the present invention; Figure 7 This is a schematic cross-sectional view of the piston cylinder structure of the present invention; Figure 8 This is a schematic diagram of the arc-shaped retaining ring connection structure of the present invention; Figure 9 This is a schematic cross-sectional view of the hydraulic housing structure of the present invention; In the diagram: 1. Arc-shaped retaining ring; 2. Support base; 3. Mounting groove; 4. Mounting base; 5. First arc-shaped slot; 6. First arc-shaped limiting plate; 7. Fixed base; 8. Second arc-shaped slot; 9. Second arc-shaped limiting plate; 10. Adjusting base; 11. First adjusting rod; 12. First pressing rod; 13. First guide surface; 14. First adjusting block; 15. Second guide surface; 16. Second pressing rod; 17. Pressing spring; 18. Second adjusting rod; 19. Second adjusting block; 20. Third guide surface; 21. Fourth guide surface; 22. Piston cylinder; 23. First piston plate; 24. Second piston plate; 25. Hydraulic housing; 26. Sealing slide plate; 27. Top pressure spring; 28. Arc-shaped mounting groove; 29. ​​Hydraulic expansion pad; 30. Liquid inlet connector; 31. Liquid outlet connector; 32. Bolt mounting hole; 33. Arc-shaped clamping groove; 34. Pipeline. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0018] To effectively improve the compatibility and fixation strength of cable clamps and ensure the stable and reliable operation of power transmission lines, as one embodiment of the present invention, such as... Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, the present invention provides a combined power line crossarm, comprising two sets of arc-shaped retaining rings 1 for clamping the power pole. A horizontally arranged support base 2 is fixed on the outside of the arc-shaped retaining ring 1. Several sets of mounting grooves 3 are provided on the upper part of the support base 2. A mounting base 4 is detachably assembled above the mounting grooves 3. A first arc-shaped slot 5 is provided inside the mounting base 4. A first arc-shaped limiting plate 6 is assembled in the first arc-shaped slot 5. A fixing base 7 is integrally connected to one side of the mounting base 4. A second arc-shaped slot 8 is provided at the bottom of the fixing base 7. A second arc-shaped limiting plate 9 is provided in the second arc-shaped slot 8. The mounting base 4 and the fixed base 7 are provided with a communicating mounting channel. The mounting channel is equipped with a heat-shrinkable transmission component. The side of the support base 2 is detachably equipped with an adjustment base 10 corresponding to the fixed base 7. When the first arc-shaped limiting plate 6 is pressed and moves upward, it drives the second arc-shaped limiting plate 9 to move downward to clamp the cable through the heat-shrinkable transmission component. The heat-shrinkable transmission component adaptively adjusts the clamping force of the first arc-shaped limiting plate 6 and the second arc-shaped limiting plate 9 according to the change of ambient temperature.

[0019] When in use, first attach the two sets of arc-shaped clips 1 to the utility pole and fix them in place to ensure the stable installation of the support base 2. Then place the cable to be fixed in the mounting groove 3 on the upper part of the support base 2, and then assemble the mounting base 4 into the mounting groove 3. When the cable is thin, the corresponding adjustment seat 10 can be removed. During the downward movement of the mounting seat 4, the first arc-shaped limiting plate 6 directly contacts the surface of the cable. With the help of the arc-shaped clamping groove 33 of the support seat 2, stable clamping can be completed. At this time, the fixing seat 7 can form an auxiliary limit on the upper part of the cable, effectively preventing the cable from shaking or shifting during use. When the cable is thick, ensure that the corresponding position is equipped with the adjustment seat 10. During the downward movement of the mounting seat 4, the thick cable will squeeze the first arc-shaped limiting plate 6 to move upward, thereby driving the heat-shrinkable transmission component to move, causing the second arc-shaped limiting plate 9 in the fixed seat 7 to move downward and fit with the cable. With the adjustment seat 10, the clamping force area of ​​the cable can be greatly increased. While improving the clamping stability, it avoids hard contact that could cause cable damage. It can adapt to cables of different thicknesses without the need to replace different specifications of clamps. It solves the problems of narrow application range, insufficient clamping area, easy loosening or easy damage to cables of traditional clamping structures. The overall adaptability is stronger and the use is safer, which can meet the usage requirements of long-term stable deployment of power lines. Meanwhile, the heat-shrinkable transmission component can sense changes in ambient temperature in real time. When the cable expands due to heat in the summer, the heat-shrinkable transmission component automatically reduces the clamping force of the first arc-shaped limiting plate 6 to prevent excessive clamping force from damaging the cable insulation layer. When the cable contracts due to cold in the winter, the heat-shrinkable transmission component automatically increases the clamping force to prevent the cable from shifting due to loose clamping. This solves the problem of clamping gaps or excessive compression caused by alternating hot and cold temperatures in traditional structures.

[0020] To address the technical problems of poor compatibility, unadjustable clamping force, and easy damage to cables associated with traditional clamping devices, for example, such as... Figure 6 As shown, the present invention also includes a heat-shrinkable transmission assembly comprising a first adjusting rod 11 slidably disposed in the mounting groove and a first pressing rod 12 vertically fixed to the upper part of the first arc-shaped limiting plate 6. The first pressing rod 12 passes upward through the mounting base 4 and is slidably connected to the mounting base 4. The upper end of the first pressing rod 12 is provided with a first guide surface 13. One end of the first adjusting rod 11 is fixed with a first adjusting block 14. The first adjusting block 14 is provided with a second guide surface 15 that cooperates with the first guide surface 13. Several vertical second extrusion rods 16 are fixed on the upper surface of the second arc-shaped limiting plate 9. The second extrusion rods 16 pass upward through the fixed seat 7 and are slidably connected to the fixed seat 7. Several sets of extrusion springs 17 are connected between the second arc-shaped limiting plate 9 and the inner wall of the second arc-shaped slot 8. The mounting groove in the fixed seat 7 is provided with a second adjusting rod 18. A second adjusting block 19 is fixed to one end of the second adjusting rod 18. A third guide surface 20 is provided on the second adjusting block 19. A fourth guide surface 21 that cooperates with the third guide surface 20 is provided on one side of the second extrusion rod 16. A heat shrinkable part is connected between the first adjusting rod 11 and the second adjusting rod 18. The end of the second adjusting rod 18 away from the heat shrinkable part is connected to a hydraulic pressure supply structure.

[0021] During use, for thick cables, the mounting base 4 moves downward and assembles with the support base 2. The outer wall of the cable presses against the first arc-shaped limiting plate 6, causing it to move upward. The first arc-shaped limiting plate 6 drives the first pressing rod 12 to move upward synchronously. The first guide surface 13 at the upper end of the first pressing rod 12 and the second guide surface 15 of the first adjusting block 14 press against each other, driving the first adjusting rod 11 to move horizontally towards the fixed base 7. After the first adjusting rod 11 moves, it acts on the heat shrink part and drives the second adjusting rod 18 to move horizontally. The second adjusting rod 18 drives the second adjusting block 19 to move. The third guide surface 20 on the adjusting block 19 is pressed and engaged with the fourth guide surface 21 of the second pressing rod 16, driving the second pressing rod 16 to move downward. When the second pressing rod 16 moves downward, it stretches the pressing spring 17, and at the same time drives the second arc-shaped limiting plate 9 to move downward smoothly. The second arc-shaped limiting plate 9 cooperates with the adjusting seat 10 assembled below to increase the clamping and wrapping area of ​​the thick cable, avoiding damage, deformation or crushing of the cable insulation layer caused by the small contact area and stress concentration of the traditional fixed clamping method. It effectively improves the uniformity, stability and safety of the clamping of the thick cable and reduces the hidden dangers of line operation. When clamping thin cables, the hydraulic pressure supply structure maintains pre-tightening pressure in the initial state, driving the second adjusting rod 18, the heat shrink component, and the first adjusting rod 11 to reset and move, so that the first pressing rod 12 and the first arc-shaped limiting plate 6 maintain a reasonable pre-tightening force. When the thin cable is pressed down by the mounting base 4, there is no need to squeeze the transmission components significantly. It can achieve stable clamping by relying on the preset clamping force, and there will be no problems such as excessively loose clamping, shaking, or displacement. It is compatible with different wire diameters, has stronger versatility, and is more convenient to install. It can effectively solve the technical problems of poor compatibility, non-adjustable clamping force, and easy damage to cables of traditional clamping devices, and significantly improve the safety of use and long-term operational stability of power line crossarms.

[0022] To improve the safety of power cable fixing, for example, such as Figure 6 , Figure 7As shown, the present invention also includes a heat shrinkable component comprising a piston cylinder 22 fixedly installed in an installation channel, wherein a first piston plate 23 and a second piston plate 24 are slidably connected within the piston cylinder 22; the ends of a first adjusting rod 11 and a second adjusting rod 18 pass through the piston cylinder 22 and are fixedly connected to the first piston plate 23 and the second piston plate 24 respectively; and a temperature-sensitive anti-expansion fluid is filled between the first piston plate 23 and the second piston plate 24.

[0023] In use, for thicker cables, the mounting base 4 presses down to move the first arc-shaped limiting plate 6 upward and drive the first adjusting rod 11 to move. The first adjusting rod 11 drives the first piston plate 23 to move horizontally inside the piston cylinder 22. The first piston plate 23 squeezes the temperature-sensitive anti-expansion fluid inside the piston cylinder 22, pushing the second piston plate 24 to move synchronously. The second piston plate 24 drives the second adjusting rod 18 to move, thereby driving the second arc-shaped limiting plate 9 to move downward smoothly. This, together with the adjusting base 10, increases the clamping and wrapping area of ​​the thicker cable, avoiding stress concentration and damage to the cable. When the cable expands due to heat in summer or high temperature environment, the temperature-sensitive anti-expansion fluid contracts due to heat, causing the first piston plate 23 and the second piston plate 24 to move closer to each other, automatically reducing the pushing stroke of the first adjusting rod 11 and the second adjusting rod 18, reducing the clamping force of the first arc-shaped limiting plate 6 and the second arc-shaped limiting plate 9, avoiding excessive clamping force that could cause damage, deformation or crushing of the cable insulation layer, and achieving automatic high temperature unloading protection. When the cable contracts due to the cold in low-temperature winter conditions, the temperature-sensitive anti-expansion fluid expands in volume, pushing the first piston plate 23 and the second piston plate 24 away from each other. This causes the first adjusting rod 11 and the second adjusting rod 18 to reset and push, automatically increasing the clamping force of the first arc-shaped limiting plate 6 and the second arc-shaped limiting plate 9. This prevents the cable from loosening, shaking, shifting, or falling off due to contraction, achieving automatic tightening at low temperatures. It requires no electric drive or manual adjustment and can achieve all-weather adaptive clamping based on ambient temperature and cable deformation. This solves the problems of traditional clamping devices being unable to adapt to thermal expansion and contraction, being prone to loosening, being prone to wire compression, and having poor reliability, significantly improving the safety and long-term operational stability of power cable fixing.

[0024] For example, such as Figure 6 , Figure 9 As shown, the present invention also includes a hydraulic pressure supply structure comprising a hydraulic housing 25 fixedly installed in the mounting groove of the fixed base 7, and a sealing slide plate 26 being slidably connected inside the hydraulic housing 25; one end of the second adjusting rod 18 away from the piston cylinder 22 passes through the hydraulic housing 25 and is fixedly connected to the sealing slide plate 26; a top pressure spring 27 is fixedly connected between the sealing slide plate 26 and the inner wall of the hydraulic housing 25.

[0025] In use, in the initial state, the top pressure spring 27 continuously pushes the sealing slide plate 26, causing the sealing slide plate 26 to drive the second adjusting rod 18 to maintain the preset pushing position. The second adjusting rod 18, through the cooperation of the heat shrink part, the first piston plate 23, the first adjusting rod 11 and the guide surface, drives the first arc-shaped limiting plate 6 to maintain the initial pre-tightening force, which can stably adapt to the clamping requirements of thin cables, avoid problems such as loose clamping, shaking and swaying of thin cables due to insufficient pre-tightening force, and ensure that the thin cables are installed firmly and reliably. When clamping a thicker cable, the mounting base 4 presses down, causing the first arc-shaped limiting plate 6 to be squeezed upwards. This sequentially drives the first adjusting rod 11, the first piston plate 23, the temperature-sensitive anti-expansion fluid, the second piston plate 24, and the second adjusting rod 18 to move horizontally. The second adjusting rod 18 pushes the sealing slide plate 26 to move smoothly within the hydraulic housing 25. During the movement of the sealing slide plate 26, the top pressure spring 27 is compressed to store energy, ensuring that both thick and thin cables can be reliably clamped. It also provides continuous reset capability during temperature adaptive adjustment, keeping the clamping force of the first arc-shaped limiting plate 6 and the second arc-shaped limiting plate 9 within a reasonable range, effectively improving the overall structural stability.

[0026] To improve the reliability of the connection between the crossarm and the utility pole, for example, such as Figure 1 , Figure 2 , Figure 4 , Figure 8 As shown, the present invention also includes a plurality of arc-shaped mounting grooves 28 on the inner side of the arc-shaped retaining ring 1, and a hydraulic expansion pad 29 is provided in the arc-shaped mounting grooves 28; an inlet connector 30 connected to the hydraulic expansion pad 29 is provided on the outer side of the arc-shaped retaining ring 1; and an outlet connector 31 connected to the hydraulic housing 25 is provided on the outer side of the fixed seat 7, and the outlet connector 31 is connected to the inlet connector 30 through a pipeline 34.

[0027] During use, the cable pushes the first arc-shaped limiting plate 6 to a certain displacement during clamping, which in turn drives the heat-shrinkable transmission component and the hydraulic pressure supply structure to move. The sealing slide plate 26 moves within the hydraulic housing 25 and delivers the internal liquid through the liquid outlet joint 31 and the pipeline 34 to the liquid inlet joint 30, and finally enters the hydraulic expansion pad 29, causing the hydraulic expansion pad 29 to expand inward and generate a tightening force, forcing the arc-shaped retaining ring 1 to open outward and further tighten the pole, greatly improving the clamping force and anti-loosening force between the arc-shaped retaining ring 1 and the pole, and preventing the crossarm from loosening, slipping or deflecting. Moreover, the thicker the cable and the more cables installed, the greater the displacement of the sealing slide plate 26, the greater the liquid supply, the stronger the tightening force of the hydraulic expansion pad 29, and the more stable the fixing effect. Even when clamping thin cables, a basic liquid supply pressure can be generated to keep the hydraulic expansion pad 29 in a preset tightening state, so that stable fixing can be achieved without repeated manual adjustment of bolts. The overall clamping force is adaptively enhanced with the cable diameter and load, which significantly improves the connection reliability between the crossarm and the pole. Furthermore, the clamping force generated by the expansion of the hydraulic expansion pad 29 can significantly reduce the swaying amplitude and vibration transmission of the cable under the action of wind, effectively suppress the resonance phenomenon between the crossarm and the cable, and avoid problems such as bolt loosening, structural fatigue, and clamping failure caused by long-term wind vibration.

[0028] For example, such as Figure 4 As shown, the present invention also includes bolt mounting holes 32 on the side of the two sets of arc-shaped retaining rings 1 that are close to each other, and the adjacent arc-shaped retaining rings 1 are locked together by several sets of bolts passing through the bolt mounting holes 32.

[0029] In use, the two sets of arc-shaped retaining rings 1 can be quickly fitted and locked onto the utility pole by passing the bolts through the bolt mounting holes 32, ensuring that the arc-shaped retaining rings 1 are firmly connected to the utility pole, and meeting the needs of rapid construction and stable fixing of outdoor power lines.

[0030] For example, such as Figure 3 As shown, the present invention also includes arc-shaped clamping grooves 33 on the upper surface of the support base 2 and the upper surface of the adjustment base 10, respectively corresponding to the first arc-shaped groove 5 and the second arc-shaped groove 8.

[0031] In use, the arc-shaped clamping groove 33 on the upper surface of the support base 2 and the adjustment base 10 can be adapted to the outer arc surface of the cable, and correspond to the first arc-shaped groove 5 and the second arc-shaped groove 8, which facilitates the rapid placement, centering and stable clamping of the cable, improves the clamping fit and installation smoothness, and effectively improves the assembly accuracy and clamping reliability.

[0032] For example, the present invention further includes that the inner sides of both the first arc-shaped limiting plate 6 and the second arc-shaped limiting plate 9 are provided with anti-slip buffer pads.

[0033] When in use, the anti-slip buffer pad can directly and flexibly contact the outer wall of the cable, increasing the coefficient of friction between the pad and the cable, preventing the cable from sliding, shifting, or twisting under wind vibration or temperature deformation, and improving clamping stability. At the same time, the buffer pad can play a flexible buffering role, avoiding the direct compression of the cable by the rigid structure, which can cause scratches, indentations, damage, or cracks to the insulation layer, and extend the service life of the cable and the clamping structure.

[0034] When using this invention, two sets of arc-shaped retaining rings 1 are first fitted onto the outside of the utility pole. The two sets of arc-shaped retaining rings 1 are then locked and assembled by passing bolts through the bolt mounting holes 32, so that the arc-shaped retaining rings 1 initially grip the utility pole, thereby achieving rapid positioning and fixing of the support base 2. The operation is simple and the installation efficiency is high, which can meet the needs of rapid construction of outdoor power lines. Depending on the thickness of the cable to be clamped, choose whether to assemble the adjustment seat 10: when the cable is thin, it is not necessary to assemble the adjustment seat 10 on the side of the support seat 2; when the cable is thick, the adjustment seat 10 can be detachably assembled on the side of the support seat 2 and aligned vertically with the fixed seat 7. By using the adjustment seat 10, the device can flexibly adapt to cables of different diameters, improving the overall versatility and adaptability. Place the cable to be fixed in the mounting groove 3 on the upper part of the support base 2, so that the cable falls into the arc-shaped clamping groove 33 of the support base 2. The arc-shaped clamping groove 33 is adapted to the outer arc surface of the cable, which can realize the rapid centering and positioning of the cable. The mounting base 4 is fitted onto the mounting groove 3 of the support base 2 and pressed down. During the downward movement of the mounting base 4, the first arc-shaped limiting plate 6 in the first arc-shaped slot 5 contacts the surface of the cable. The thin cable can be directly clamped stably through the first arc-shaped limiting plate 6 and the arc-shaped clamping groove 33. At the same time, the fixing base 7 forms an auxiliary limit on the upper part of the thin cable, effectively preventing the thin cable from shaking or shifting, and ensuring that the clamping is firm and reliable. When clamping a thicker cable, the mounting base 4 continuously moves downward, causing the thicker cable to squeeze the first arc-shaped limiting plate 6 upward. The first arc-shaped limiting plate 6 drives the first pressing rod 12 to move upward synchronously. The first guide surface 13 of the first pressing rod 12 and the second guide surface 15 of the first adjusting block 14 press together, driving the first adjusting rod 11 to move horizontally to the side of the fixed base 7. After the first adjusting rod 11 moves, it drives the first piston plate 23 inside the piston cylinder 22 to move synchronously. The first piston plate 23 squeezes the temperature-sensitive reverse expansion fluid inside the piston cylinder 22, pushing the second piston plate 24 and the second adjusting rod 18 to move horizontally. The third guide surface 20 of the second adjusting block 19 and the fourth guide surface 21 of the second pressing rod 16 cooperate, driving the second pressing rod 16 and the second arc-shaped limiting plate 9 to move downward smoothly. The second arc-shaped limiting plate 9, in conjunction with the adjusting base 10, increases the clamping and wrapping area of ​​the thicker cable, evenly disperses the clamping stress, avoids local stress concentration causing damage, deformation or crushing of the cable insulation layer, and significantly improves the clamping safety of the thicker cable. When the second extrusion rod 16 moves down, it stretches the extrusion spring 17. Simultaneously, the second adjustment rod 18 pushes the sealing slide plate 26 inside the hydraulic housing 25 to move. The sealing slide plate 26 compresses the top pressure spring 27 to store energy. The top pressure spring 27 provides continuous pre-tightening force and reset capability for the device, ensuring that the clamping force of thick and thin cables is always within a reasonable range, and improving the overall structural stability. During the movement of the sealing slide plate 26, the liquid in the hydraulic housing 25 is transported to the inlet connector 30 through the outlet connector 31 and the pipeline 34, and finally enters the hydraulic expansion pad 29 inside the arc-shaped retaining ring 1, causing the hydraulic expansion pad 29 to expand inward and generate a tightening force, which forces the arc-shaped retaining ring 1 to open outward and further tighten the pole. The thicker the cable and the more cables installed, the stronger the tightening force, which effectively improves the crossarm's anti-slip, anti-torsion, and anti-wind vibration capabilities, avoids loosening and failure during long-term operation, and enhances the reliability of outdoor use. After the device is put into use, the temperature-sensitive anti-expansion fluid in the heat-shrinkable transmission component senses changes in ambient temperature in real time: when the high-temperature cable expands due to heat in summer, the temperature-sensitive anti-expansion fluid contracts due to heat, reducing the clamping force of the first arc-shaped limiting plate 6 and the second arc-shaped limiting plate 9, and avoiding excessive squeezing and damage to the cable; when the low-temperature cable contracts due to cold in winter, the temperature-sensitive anti-expansion fluid expands in volume, automatically increasing the clamping force to prevent the cable from loosening or falling off. It does not require electric drive or manual adjustment, and achieves all-weather temperature adaptive clamping, solving the problem of clamping gaps or excessive squeezing caused by alternating hot and cold temperatures in traditional devices.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite power line crossarm, characterized in that, It includes two sets of arc-shaped retaining rings (1) for clamping the utility poles. A horizontally arranged support base (2) is fixed on the outside of the arc-shaped retaining ring (1). Several sets of mounting slots (3) are opened on the upper part of the support base (2). A mounting seat (4) is detachably assembled above the mounting slots (3). A first arc-shaped slot (5) is opened inside the mounting seat (4). A first arc-shaped limiting plate (6) is assembled in the first arc-shaped slot (5). A fixed seat (7) is integrally connected to one side of the mounting seat (4). A second arc-shaped slot (8) is opened at the bottom of the fixed seat (7). A second arc-shaped limiting plate (9) is installed in the second arc-shaped slot (8). The mounting base (4) and the fixed base (7) are provided with a connected mounting channel. The mounting channel is equipped with a heat-shrinkable transmission component. The side of the support base (2) is detachably equipped with an adjustment base (10) corresponding to the fixed base (7). When the first arc-shaped limiting plate (6) is pressed and moves upward, it drives the second arc-shaped limiting plate (9) to move downward to clamp the cable through the heat-shrinkable transmission component. The heat-shrinkable transmission component adaptively adjusts the clamping force of the first arc-shaped limiting plate (6) and the second arc-shaped limiting plate (9) according to the change of ambient temperature.

2. The combined power line crossarm according to claim 1, characterized in that, The heat-shrinkable transmission assembly includes a first adjusting rod (11) slidably disposed in the mounting groove and a first pressing rod (12) vertically fixed on the upper part of the first arc-shaped limiting plate (6). The first pressing rod (12) passes upward through the mounting base (4) and is slidably connected to the mounting base (4). The upper end of the first pressing rod (12) is provided with a first guide surface (13). One end of the first adjusting rod (11) is fixed with a first adjusting block (14). The first adjusting block (14) is provided with a second guide surface (15) that cooperates with the first guide surface (13). Several vertical second extrusion rods (16) are fixed on the upper surface of the second arc-shaped limiting plate (9). The second extrusion rods (16) pass upward through the fixed seat (7) and are slidably connected to the fixed seat (7). Several sets of extrusion springs (17) are connected between the second arc-shaped limiting plate (9) and the inner wall of the second arc-shaped slot (8). The mounting groove in the fixed seat (7) is provided with a second adjusting rod (18). A second adjusting block (19) is fixed at one end of the second adjusting rod (18). A third guide surface (20) is provided on the second adjusting block (19). A fourth guide surface (21) that cooperates with the third guide surface (20) is provided on one side of the second extrusion rod (16). A heat shrinkable part is connected between the first adjusting rod (11) and the second adjusting rod (18). The end of the second adjusting rod (18) away from the heat shrinkable part is connected to a hydraulic pressure supply structure.

3. A combined power line crossarm according to claim 2, characterized in that, The heat shrinkable part includes a piston cylinder (22) fixedly installed in the mounting channel, and a first piston plate (23) and a second piston plate (24) are sealed and slidably connected inside the piston cylinder (22); the ends of the first adjusting rod (11) and the second adjusting rod (18) pass through the piston cylinder (22) and are fixedly connected to the first piston plate (23) and the second piston plate (24) respectively; the space between the first piston plate (23) and the second piston plate (24) is filled with a temperature-sensitive reverse expansion fluid.

4. A combined power line crossarm according to claim 3, characterized in that, The hydraulic pressure supply structure includes a hydraulic housing (25) fixedly installed in the mounting groove of the fixed seat (7), and a sealing slide plate (26) is sealed and slidably connected inside the hydraulic housing (25); the end of the second adjusting rod (18) away from the piston cylinder (22) passes through the hydraulic housing (25) and is fixedly connected to the sealing slide plate (26); a top pressure spring (27) is fixedly connected between the sealing slide plate (26) and the inner wall of the hydraulic housing (25).

5. A combined power line crossarm according to claim 4, characterized in that, The inner side of the arc-shaped retaining ring (1) is provided with several arc-shaped mounting grooves (28), and the arc-shaped mounting grooves (28) are provided with hydraulic expansion pads (29); the outer side of the arc-shaped retaining ring (1) is provided with a liquid inlet connector (30) that communicates with the hydraulic expansion pads (29); the outer side of the fixed seat (7) is provided with a liquid outlet connector (31) that communicates with the hydraulic housing (25), and the liquid outlet connector (31) is connected to the liquid inlet connector (30) through a pipeline (34).

6. A combined power line crossarm according to claim 5, characterized in that, Two sets of arc-shaped retaining rings (1) are provided with bolt mounting holes (32) on the side of each other. The adjacent arc-shaped retaining rings (1) are locked together by several sets of bolts passing through the bolt mounting holes (32).

7. A combined power line crossarm according to claim 6, characterized in that, Both the upper surface of the support base (2) and the upper surface of the adjustment base (10) are provided with arc-shaped clamping grooves (33), which correspond to the first arc-shaped groove (5) and the second arc-shaped groove (8) respectively.

8. A combined power line crossarm according to claim 7, characterized in that, The inner sides of the first arc-shaped limiting plate (6) and the second arc-shaped limiting plate (9) are provided with anti-slip buffer pads.

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