Overhead line supporting structure detection system

Abstract

The invention relates to an overhead line support structure detection system in the technical field of power grid maintenance, which comprises a tower body and a cross arm rod fixed at the upper part of the tower body, an elastic support ring is sleeved outside the tower body close to the cross arm rod, and a plurality of flexible strain gauges in signal connection with an external processor are laid on the whole lower ring surface of the elastic support ring in an annular array manner. The annular surface of the elastic supporting ring is arranged to be in a wave shape in the circumferential direction of the elastic supporting ring so that the elastic supporting ring can deform in the circumferential direction and the axial direction. The cross arm rod is provided with a plurality of detection points along a rod body, and a dowel bar is fixedly connected between each detection point and the outer edge of the corresponding elastic support ring; the detection system is convenient to install, high in adaptability and more comprehensive in stress direction detection.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid maintenance, and particularly to a detection system for an overhead line support structure. Background Art

[0002] With the expansion of the scale of the power grid, support structures such as poles and iron towers of overhead lines are long-term exposed to complex environments and are vulnerable to external forces such as strong winds, icing, and geological settlement, resulting in structural deformation, inclination, or even fracture, threatening the safety of the power grid. Traditionally, maintenance mainly relies on manual inspections and visual checks. Maintenance personnel regularly climb poles or use tools such as telescopes and drones for visual inspections, and judge problems such as structural posture, corrosion, cracks, and bolt loosening through experience. The disadvantages are poor detection timeliness, strong subjectivity, and there are also safety detection risks in thunderstorm, ice and snow, or strong wind environments. In some existing scenarios, strain gauges are also used to monitor local areas of the support structure, such as cross arms. Data is transmitted back by wired or wireless means. According to the deformation analysis of the strain gauges, the force and deformation conditions of the cross arms can be judged. Although the problems of traditional manual inspections are solved, there are still the following defects: First, due to the different structures of cross arms and the relatively large number of detection points, directly attaching strain gauges is not only troublesome, but also often fails to adapt to the structural changes of cross arms, resulting in improper attachment and high installation requirements, leading to low adaptability to existing poles. Second, because the cross arm is a cantilever structure, the outer end is vulnerable to forces in various directions, but currently, strain gauges are often only attached to the lower surface of the cross arm to detect its vertical deformation, resulting in incomplete detection. Summary of the Invention

[0003] In order to overcome the deficiencies in the background art and solve the existing technical problems, the present invention discloses a detection system for an overhead line support structure, which is not only easy to install and has strong adaptability, but also has a more comprehensive detection of the force direction.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A detection system for an overhead line support structure includes a tower body and a cross arm fixed to the upper part of the tower body. An elastic support ring is sleeved outside the tower body near the cross arm. A plurality of flexible strain gauges signal-connected to an external processor are arranged in a circular array on the entire lower ring surface of the elastic support ring. The ring surface of the elastic support ring is set as a wavy shape along the circumferential direction of the elastic support ring, so that the elastic support ring can deform in the circumferential and axial directions. A plurality of detection points are arranged along the rod body of the cross arm, and a force transmission rod is fixedly connected between each detection point and the outer edge of the corresponding elastic support ring.

[0005] Further, the elastic support ring gradually changes from a planar shape on the inner ring surface to a wavy shape on the outer ring surface.

[0006] Furthermore, multiple flexible strain gauges are also arranged in multiple circles from the outer ring surface to the inner ring surface of the elastic support ring.

[0007] Furthermore, the elastic support ring is composed of two semi-ring units detachably connected.

[0008] Furthermore, a vibration sensor is installed on the elastic support ring.

[0009] Furthermore, the tower body is a vertical rod, the inner diameter of the elastic support ring is larger than the diameter of the tower body, and the outer diameter of the elastic support ring is 1.5 to 3 times the diameter of the tower body.

[0010] Furthermore, the upper end of each force transmission rod is detachably and fixedly connected or welded to the corresponding detection point of the cross arm rod.

[0011] Furthermore, the lower ends of multiple force transmission rods are connected in a uniformly spaced circular arrangement along the elastic support ring.

[0012] Due to the above-mentioned technical solution, the present invention has the following beneficial effects: The overhead line support structure detection system disclosed by the present invention can attach the strain gauge to the elastic support ring and use the force transmission rod to conduct the deformation force of the cross arm rod for indirect detection. Due to the wavy structure of the elastic support ring design, when it conducts force, it can not only deform axially but also circumferentially, thereby increasing the comprehensiveness of the deformation detection of the cross arm rod; more importantly, the strain gauge does not need to be directly attached to the cross arm rod, improving the convenience and adaptability of installation and detection. Description of the Drawings

[0013] Figure 1 is the implementation structure schematic diagram of the present invention; Figure 2 is a three-dimensional structure schematic diagram of the elastic support ring; Figure 3 is another structure schematic diagram of the elastic support ring.

[0014] In the figure: 1, tower body; 2, cross arm rod; 3, elastic support ring; 301, semi-ring unit; 4, force transmission rod; 5, detection point. Detailed Embodiments

[0015] Next, the technical solution of the present invention will be described in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or position relationship, it is only corresponding to the drawings of the present invention for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation.

[0016] Combined with the attached Figures 1-3The described overhead line support structure detection system includes a tower body 1 and a cross arm pole 2 fixed to the upper part of the tower body 1. An elastic support ring 3 is sleeved outside the tower body 1 near the cross arm pole 2. Generally, the elastic support ring 3 is arranged below the corresponding cross arm pole 2. As required, the elastic support ring 3 is composed of two semi-ring units 301 that are detachably connected. As shown in the appendix Figure 3 As described, a connecting plate is provided at the connecting end face and connected by bolts, which is convenient for sleeving outside the tower body 1. In addition, the tower body 1 is a vertical rod, the inner diameter of the elastic support ring 3 is larger than the diameter of the tower body 1, and the outer diameter of the elastic support ring 3 is 1.5 to 3 times the diameter of the tower body 1. When not in contact with the tower body 1 and with fewer detection points 5, the elastic support ring 3 can be designed smaller, which can save materials and reduce costs; A plurality of flexible strain gauges signal-connected to an external processor are arranged in a circular array on the entire lower ring surface of the elastic support ring 3 for detecting the deformation of the elastic support ring 3. Moreover, installing on the lower ring surface can also play a certain protective role. If the area of a single flexible strain gauge is small, multiple flexible strain gauges can also be arranged in multiple circles from the outer ring surface to the inner ring surface of the elastic support ring 3. As required, a vibration sensor is installed on the elastic support ring 3 for detecting vibration. The ring surface of the elastic support ring 3 is set as a wavy shape along the circumferential direction of the elastic support ring 3 so that the elastic support ring 3 can deform in the circumferential and axial directions. The elastic support ring 3 itself has axial deformability. After adding the wavy shape, it can also deform circumferentially when the cross arm pole 2 rotates and is stressed. In addition, the elastic support ring 3 gradually changes from a planar shape on the inner ring surface to a wavy shape on the outer ring surface, and a certain planarity can increase the sensitivity of axial deformation; A plurality of detection points 5 are arranged along the rod body of the cross arm pole 2. A force transmission rod 4 is fixedly connected between each detection point 5 and the outer edge of the corresponding elastic support ring 3. The force transmission rod 4 is used to transmit the deformation force received by the cross arm pole 2 to the elastic support ring 3, which is convenient for the detection points 5 to be set at any position on the surface of the cross arm pole 2. The upper end of each force transmission rod 4 is detachably fixedly connected or welded to the corresponding detection point 5 of the cross arm pole 2. If it is a temporary detection, spot welding connection or detachable connection can be designed for easy disassembly and assembly. If it is a long-term detection, welding is preferably used. As required, the lower ends of the plurality of force transmission rods 4 are connected in a uniformly spaced circular array along the elastic support ring 3, which can reduce the deformation interference at each position and is convenient for independent detection and analysis.

[0017] When implementing the described overhead line support structure detection system, before installing the elastic support ring 3, the strain gauges can be first attached to the elastic support ring 3, and then connected and installed at the corresponding position of the cross arm pole 2 using the force transmission rod 4. It is convenient and practical. Then, the deformation force of the cross arm pole 2 can be transmitted through the force transmission rod 4 for indirect detection. Due to the wavy structure designed for the elastic support ring 3, when it conducts force, it can deform axially and circumferentially, thus increasing the comprehensiveness of the deformation detection of the cross arm pole 2.

[0018] The parts not detailed in the present invention are prior arts. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the above embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention, and any reference signs in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. An overhead line support structure detection system, characterized in that: The tower body (1) comprises a tower body (1) and a cross arm (2) fixed to the upper part of the tower body (1); an elastic support ring (3) is provided on the outer cover of the tower body (1) near the cross arm (2); a plurality of flexible strain gauges connected to external processor signals are laid in an annular array on the entire lower annular surface of the elastic support ring (3); the annular surface of the elastic support ring (3) is arranged in a wavy shape along the circumference of the elastic support ring (3) so that the elastic support ring (3) can be deformed in the circumferential and axial directions; the cross arm (2) is provided with a plurality of detection points (5) along the rod body, and a force transmission rod (4) is fixedly connected between each detection point (5) and the outer edge of the corresponding elastic support ring (3).

2. The overhead line support structure detection system according to claim 1, characterized in that: The elastic support ring (3) gradually changes from a flat inner ring surface to a wavy outer ring surface.

3. The overhead line support structure detection system according to claim 1, characterized in that: A plurality of flexible strain gauges are also arranged in a plurality of circles from the outer ring surface to the inner ring surface of the elastic support ring (3).

4. The overhead line support structure detection system according to claim 1, characterized in that: The elastic support ring (3) consists of two half-ring units (301) that are detachably connected.

5. The overhead line support structure detection system according to claim 1, characterized in that: The elastic support ring (3) is equipped with a vibration sensor.

6. The overhead line support structure detection system according to claim 1, characterized in that: The tower body (1) is a vertical rod, the inner diameter of the elastic support ring (3) is larger than the diameter of the tower body (1), and the outer diameter of the elastic support ring (3) is 1.5 to 3 times the diameter of the tower body (1).

7. The overhead line support structure detection system according to claim 1, characterized in that: The upper end of each force transmission rod (4) is detachably fixedly connected or welded to a corresponding detection point (5) of the cross arm (2).

8. The overhead line support structure detection system according to claim 1, characterized in that: The lower ends of the plurality of force transmission rods (4) are evenly spaced and connected in a ring along the elastic support ring (3).

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