Cable power transmission tower cross arm with adjustable angle

Abstract

The invention belongs to the technical field of power transmission cable installation equipment, and particularly relates to an angle-adjustable cable power transmission tower cross arm which comprises a supporting device and a cross arm device. The supporting device comprises a mounting panel, a supporting arm and an adjusting mechanism, the cross arm device is arranged on the supporting device, the adjusting mechanism is arranged on the supporting device, and the relative position of the cross arm device and the supporting device is changed by utilizing the adjusting mechanism, so that the cross arm device realizes parallel, diagonal bracing and vertical multi-posture adjustment. One end of the supporting arm is fixed to the upper portion of the front side face of the installation panel, and the other end of the supporting arm extends outwards. The cross arm device has a multi-posture adjusting function, and multi-posture switching of the cross arm device is realized through an adjusting mechanism with a telescopic function and a double-hinge connecting structure: the cross arm device can be regulated to be switched among various postures such as parallel, inclined support and vertical postures by taking a bearing hinge seat as a rotating fulcrum and changing the extension length of a telescopic rod; and the differentiated requirements of complex terrains and line trends are met.

Description

Technical Field

[0001] This invention relates to the field of power transmission cable installation equipment technology, specifically to an adjustable-angle crossarm for a power transmission tower. Background Technology

[0002] As the core load-bearing component of a transmission tower, the crossarm plays a crucial role in supporting cables and ensuring safe spacing between lines. Its structural rationality directly affects the stability and adaptability of the transmission system. In actual transmission line construction, due to the influence of terrain conditions, line direction, and environmental constraints, such as mountainous areas, slopes, corners, and branches, the requirements for the crossarm's posture are diverse, necessitating installation at different angles to achieve a reasonable cable arrangement.

[0003] However, existing crossarms on transmission towers generally suffer from a fixed structure: most crossarms adopt an integrated rigid design, with a fixed posture after leaving the factory, only capable of supporting cables at a single angle, and cannot adjust the tilt angle according to on-site construction needs. If encountering complex terrain or special line layout requirements, it is necessary to customize special crossarms for different angles, which not only prolongs the construction preparation cycle, but also significantly increases equipment procurement costs and inventory management costs.

[0004] Therefore, this invention proposes an adjustable-angle crossarm for cable transmission towers. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable-angle crossarm for cable transmission towers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adjustable-angle crossarm for a cable transmission tower, comprising a support device and a crossarm assembly. The support device includes a mounting panel, a support arm, and an adjustment mechanism. The crossarm assembly is mounted on the support device, and the adjustment mechanism is provided on the support device. The adjustment mechanism is used to change the relative position of the crossarm assembly and the support device, enabling the crossarm assembly to achieve multi-position adjustment, including parallel, diagonal, and vertical orientations.

[0007] One end of the support arm is fixed to the upper front side of the mounting panel, and the other end extends outward. A load-bearing hinge seat is provided at the end of the support arm away from the mounting panel. A through groove is provided in the middle of the support arm, and the adjustment mechanism is located in the through groove.

[0008] The adjustment mechanism includes a base rod and a telescopic rod. The telescopic rod is movably inserted into the inner cavity of the base rod, and the bottom of the base rod is rotatably positioned on the lower front side of the mounting panel.

[0009] The main body of the crossarm is a lightweight frame, with modular flat panels and cover plates on the outside, and cable clamps on the top of the crossarm.

[0010] Preferably, the mounting panel is a rectangular panel with mounting bolts at the four corners. The mounting panel is attached to the tower arm of the transmission tower and fixed with mounting bolts.

[0011] Preferably, the base rod is screwed with dovetail bolts, and the telescopic rod has evenly spaced screw holes on its outer wall. The telescopic rod extends and retracts within the inner cavity of the base rod, and is then locked in place using dovetail bolts.

[0012] The top of the telescopic rod is installed at the bottom of the crossarm device, and the tilt angle of the crossarm device can be adjusted by changing the length of the telescopic rod of the adjustment mechanism.

[0013] Preferably, two load-bearing hinge heads are provided at the bottom center of the crossarm device. One load-bearing hinge head is rotatably installed at the load-bearing hinge seat, and the other load-bearing hinge head is rotatably installed at the top of the telescopic rod, so as to realize the movable connection between the adjustment mechanism and the crossarm device.

[0014] A support plate is installed on the side of the top of the support arm away from the load-bearing hinge seat. The top surface of the support plate contacts the bottom of the crossarm device, and the support plate serves as a balance support point when the crossarm device is in a parallel posture.

[0015] Preferably, the main body of the crossarm device is a U-shaped frame, with flat plates installed on both the upper and lower sides of the frame, and cable clamps evenly installed on the top surface of the upper flat plate.

[0016] The flat plate is installed by bolts, and the materials include, but are not limited to, special plastics, acrylic sheets or metals, which, together with the frame, reduce the overall weight of the crossbeam device.

[0017] Preferably, cover plates are fixed on the front and rear sides of the frame to effectively prevent rainwater erosion. Limit heads are provided at both ends of the frame, and the limit heads are covered with insulating rubber heads.

[0018] Compared with the prior art, the beneficial effects of the present invention are: This solution features multi-position adjustment capabilities and strong adaptability. Through a telescopic adjustment mechanism and a double-hinge connection structure, the crossarm device achieves multi-position switching: using the load-bearing hinge seat as the rotation fulcrum, by changing the extension length of the telescopic rod, the crossarm device can be adjusted to switch between various positions such as parallel, diagonal, and vertical, adapting to the diverse needs of complex terrain and route alignment. Compared to traditional fixed crossarms, no custom-made special components are required, significantly improving the equipment's versatility.

[0019] The adjustment operation is convenient and efficient, reducing construction difficulty. The adjustment mechanism adopts a design that uses dovetail bolts and evenly distributed screw holes. The extension and retraction of the telescopic rod can be adjusted simply by loosening the bolts, and the bolts can be tightened after positioning to complete the fixation. The whole process does not require special tools and is suitable for high-altitude operation scenarios.

[0020] The flat panel adopts a modular design with bolted connections, and lightweight materials such as special plastics and acrylic sheets can be selected according to requirements. Combined with the U-shaped frame, it reduces the weight by 30%-40% compared to traditional all-metal crossarms, thus reducing the load on the transmission tower. At the same time, the standardized adjustment mechanism and diversified material selection reduce customization costs and inventory pressure, combining economic benefits with environmental value. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the present invention in a parallel state.

[0023] Figure 3 This is a schematic diagram of the structure of the present invention in the diagonal bracing state.

[0024] Figure 4 This is a schematic diagram of the structure of the present invention in a vertical state.

[0025] In the diagram: 1. Support device, 1-1. Mounting panel, 1-2. Mounting bolt, 1-3. Support arm, 1-4. Load-bearing hinge seat, 1-5. Base rod, 1-6. Telescopic rod, 1-7. Dovetail bolt, 1-8. Load-bearing hinge head, 1-9. Support plate; 2. Crossbeam assembly, 2-1. Frame, 2-2. Flat plate, 2-3. Limiting head; 3. Cable clamps. Detailed Implementation

[0026] Traditional crossarms have a single structure and can only hold the cable in one position. If the position of the crossarm needs to be changed, it needs to be customized separately, which is very troublesome and inconvenient and increases the cost of use. This solution solves this problem. Through its own adjustment structure, the crossarm device 2 can be adjusted to multiple positions to meet the diverse installation needs of transmission tower cables.

[0027] Please see Figure 1-4 An adjustable-angle crossarm for a cable transmission tower includes a support device 1 and a crossarm device 2. The support device 1 includes a mounting panel 1-1, a support arm 1-3, and an adjustment mechanism. The mounting panel 1-1 is a rectangular panel with mounting bolts 1-2 at its four corners. The mounting panel 1-1 is attached to the tower arm of the transmission tower and fixed by screwing with the mounting bolts 1-2.

[0028] The crossbeam device 2 is mounted on the support device 1. The support device 1 is equipped with an adjustment mechanism. The adjustment mechanism is used to change the relative position of the crossbeam device 2 and the support device 1, so that the crossbeam device 2 can achieve multi-position adjustment such as parallel, oblique, and vertical.

[0029] One end of the support arm 1-3 is fixed to the upper front side of the mounting panel 1-1, and the other end extends outward. The end of the support arm 1-3 away from the mounting panel 1-1 is provided with a load-bearing hinge seat 1-4. A through groove is opened in the middle of the support arm 1-3, and the adjustment mechanism is located in the through groove.

[0030] The adjustment mechanism includes a base rod 1-5 and a telescopic rod 1-6. The telescopic rod 1-6 is movably inserted into the inner cavity of the base rod 1-5, and the bottom of the base rod 1-5 is rotatably positioned on the lower front side of the mounting panel 1-1.

[0031] Dovetail bolts 1-7 are screwed onto the base rod 1-5. Screw holes are evenly opened on the outer wall of the telescopic rod 1-6. The telescopic rod 1-6 is adjusted in position within the inner cavity of the base rod 1-5, and then locked and fixed by screwing the dovetail bolts 1-7 into the corresponding screw holes.

[0032] The top of the telescopic rod 1-6 is installed at the bottom of the crossarm device 2. The tilt angle of the crossarm device 2 can be adjusted by changing the length of the telescopic rod 1-6 of the adjustment mechanism, which is convenient and efficient.

[0033] Two load-bearing hinge heads 1-8 are provided at the bottom center of the crossarm device 2. One load-bearing hinge head 1-8 is rotatably installed at the load-bearing hinge seat 1-4, and the other load-bearing hinge head 1-8 is rotatably installed at the top of the telescopic rod 1-6, so as to realize the movable connection between the adjustment mechanism and the crossarm device 2.

[0034] A support plate 1-9 is provided on the side of the top of the support arm 1-3 away from the load-bearing hinge seat 1-4. The top surface of the support plate 1-9 contacts the bottom of the crossarm device 2. When the crossarm device 2 is in a parallel posture, the support plate 1-9 serves as the balance support point of the crossarm device 2.

[0035] The main body of the crossarm device 2 is a U-shaped frame 2-1. Flat plates 2-2 are installed on both the upper and lower sides of the frame 2-1. Cable clamps 3 are evenly installed on the top surface of the upper flat plate 2-2.

[0036] The flat plate 2-2 is installed by bolts and can be made of special plastic, acrylic sheet or metal material, depending on actual needs, which facilitates the diversification of materials and, together with the frame 2-1, effectively reduces the overall weight of the crossbeam device 2.

[0037] Cover plates are fixed to the front and rear sides of frame 2-1 to effectively prevent rainwater erosion, allowing the main body of frame 2-1 to be used for a longer period of time. Limit heads 2-3 are provided at the left and right ends of frame 2-1, and the limit heads 2-3 are covered with insulating rubber heads.

[0038] Working principle: Mounting panel 1-1 is screwed onto the tower arm of the transmission tower by mounting bolts 1-2 at the four corners, providing a stable mounting base for the entire crossarm. One end of the support arm 1-3 is fixed to the upper front side of the mounting panel 1-1, and the other end extends outward and is equipped with a load-bearing hinge seat 1-4 for supporting the crossarm device 2. At the same time, the through groove in the middle of the support arm 1-3 provides space for the adjustment mechanism.

[0039] The bottom of the adjusting mechanism's base rod 1-5 is rotatably connected to the lower front side of the mounting panel 1-1, and the telescopic rod 1-6 is movably inserted into the inner cavity of the base rod 1-5. The operator can adjust the length of the telescopic rod 1-6 extending beyond the base rod 1-5 as needed. After adjustment, the dovetail bolt 1-7 is screwed into the corresponding screw hole on the outer wall of the telescopic rod 1-6 to lock the relative position of the telescopic rod 1-6 and the base rod 1-5, thus fixing the overall length of the adjusting mechanism.

[0040] The two load-bearing hinge heads 1-8 at the bottom center of the crossarm device 2 are rotatably connected to the load-bearing hinge seat 1-4 at the end of the support arm 1-3 and the top of the telescopic rod 1-6, forming a triangular linkage structure. When the telescopic rod 1-6 of the adjustment mechanism extends or retracts to change its length, it will push or pull the crossarm device 2 around the load-bearing hinge seat 1-4 with the rotating connection point as the fulcrum, thereby changing the relative angle between the crossarm device 2 and the support device 1, and realizing the switching of multiple postures such as parallel, oblique support and vertical.

[0041] When the crossarm device 2 is adjusted to a parallel position, the support plate 1-9 at the top of the support arm 1-3 will contact the bottom of the crossarm device 2, becoming the balance support point of the crossarm, enhancing the load-bearing stability of the crossarm in a parallel state, and avoiding angular deviation caused by the weight of the cable.

[0042] The main body of the crossarm device 2, the U-shaped frame 2-1, has flat plates 2-2 installed on its upper and lower sides. Cable clamps 3 on the top surface of the upper flat plate 2-2 are used to fix the cables. The cover plates on the front and rear sides of the frame 2-1 can prevent rainwater erosion and extend its service life. The limiting heads 2-3 at both ends are covered with insulating rubber heads, providing insulation protection. Meanwhile, the flat plates 2-2 are bolted and their material is optional, working in conjunction with the U-shaped frame 2-1 to achieve a lightweight design and reduce the load on the support device 1.

[0043] The entire device adjusts the length of the mechanism to drive the crossarm device 2 to rotate around the hinge connection point. Combined with the locking structure and auxiliary support, it achieves stable adjustment of the crossarm in multiple postures to meet the diverse installation needs of cables.

Claims

1. An adjustable-angle crossarm for a cable transmission tower, comprising a support device (1) and a crossarm device (2), characterized in that: The support device (1) includes a mounting panel (1-1), a support arm (1-3) and an adjustment mechanism. The crossbeam device (2) is mounted on the support device (1). The adjustment mechanism is set on the support device (1). The relative position of the crossbeam device (2) and the support device (1) is changed by the adjustment mechanism, so that the crossbeam device (2) can achieve multi-position adjustment of parallel, oblique and vertical. One end of the support arm (1-3) is fixed to the upper front side of the mounting panel (1-1), and the other end extends outward. A load-bearing hinge seat (1-4) is provided at the end of the support arm (1-3) away from the mounting panel (1-1). A through groove is provided in the middle of the support arm (1-3), and the adjustment mechanism is located in the through groove. The adjustment mechanism includes a base rod (1-5) and a telescopic rod (1-6). The telescopic rod (1-6) is movably inserted into the inner cavity of the base rod (1-5). The bottom of the base rod (1-5) is rotatably set on the lower part of the front side of the mounting panel (1-1). The main body of the crossarm device (2) is a lightweight frame (2-1), and a modular flat plate (2-2) and a cover plate are provided on the outside. A cable clamp (3) is provided on the top of the crossarm device (2).

2. The adjustable-angle crossarm of a cable transmission tower according to claim 1, characterized in that: The mounting panel (1-1) is a rectangular panel with mounting bolts (1-2) at the four corners. The mounting panel (1-1) is attached to the tower arm of the transmission tower and fixed with mounting bolts (1-2).

3. The adjustable-angle crossarm of a cable transmission tower according to claim 1, characterized in that: The base rod (1-5) is screwed with dovetail bolts (1-7), and the telescopic rod (1-6) has evenly spaced screw holes on its outer wall. The telescopic rod (1-6) is adjusted in the inner cavity of the base rod (1-5), and then locked and fixed with dovetail bolts (1-7). The top of the telescopic rod (1-6) is installed at the bottom of the crossarm device (2). The tilt angle of the crossarm device (2) can be adjusted by changing the length of the telescopic rod (1-6) of the adjustment mechanism.

4. An adjustable-angle crossarm for a cable transmission tower according to claim 3, characterized in that: Two load-bearing hinge heads (1-8) are provided in the middle of the bottom of the crossarm device (2). One load-bearing hinge head (1-8) is rotatably installed at the load-bearing hinge seat (1-4), and the other load-bearing hinge head (1-8) is rotatably installed at the top of the telescopic rod (1-6) to realize the movable connection between the adjustment mechanism and the crossarm device (2). A support plate (1-9) is provided on the side of the top of the support arm (1-3) away from the load-bearing hinge seat (1-4). The top surface of the support plate (1-9) contacts the bottom of the crossarm device (2). The support plate (1-9) serves as a balance support point when the crossarm device (2) is in a parallel posture.

5. An adjustable-angle crossarm for a cable transmission tower according to claim 1, characterized in that: The main body of the crossarm device (2) is a U-shaped frame (2-1). Flat plates (2-2) are installed on both the upper and lower sides of the frame (2-1). Cable clamps (3) are evenly installed on the top surface of the upper flat plate (2-2). The flat plate (2-2) is installed by bolts. The material includes, but is not limited to, special plastics, acrylic sheets or metals. It works with the frame (2-1) to reduce the overall weight of the crossbeam device (2).

6. An adjustable-angle crossarm for a cable transmission tower according to claim 5, characterized in that: Cover plates are fixed on the front and rear sides of the frame (2-1) to effectively block the erosion of rainwater; limit heads (2-3) are set at the left and right ends of the frame (2-1), and the limit heads (2-3) are covered with insulating rubber heads.

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